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linux-next/net/sched/cls_u32.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* net/sched/cls_u32.c Ugly (or Universal) 32bit key Packet Classifier.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* The filters are packed to hash tables of key nodes
* with a set of 32bit key/mask pairs at every node.
* Nodes reference next level hash tables etc.
*
* This scheme is the best universal classifier I managed to
* invent; it is not super-fast, but it is not slow (provided you
* program it correctly), and general enough. And its relative
* speed grows as the number of rules becomes larger.
*
* It seems that it represents the best middle point between
* speed and manageability both by human and by machine.
*
* It is especially useful for link sharing combined with QoS;
* pure RSVP doesn't need such a general approach and can use
* much simpler (and faster) schemes, sort of cls_rsvp.c.
*
* JHS: We should remove the CONFIG_NET_CLS_IND from here
* eventually when the meta match extension is made available
*
* nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro>
*/
#include <linux/module.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
#include <linux/percpu.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
net_sched: avoid generating same handle for u32 filters When kernel generates a handle for a u32 filter, it tries to start from the max in the bucket. So when we have a filter with the max (fff) handle, it will cause kernel always generates the same handle for new filters. This can be shown by the following command: tc qdisc add dev eth0 ingress tc filter add dev eth0 parent ffff: protocol ip pref 770 handle 800::fff u32 match ip protocol 1 0xff tc filter add dev eth0 parent ffff: protocol ip pref 770 u32 match ip protocol 1 0xff ... we will get some u32 filters with same handle: # tc filter show dev eth0 parent ffff: filter protocol ip pref 770 u32 filter protocol ip pref 770 u32 fh 800: ht divisor 1 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 handles should be unique. This patch fixes it by looking up a bitmap, so that can guarantee the handle is as unique as possible. For compatibility, we still start from 0x800. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-18 08:34:53 +08:00
#include <linux/bitmap.h>
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
#include <linux/netdevice.h>
#include <linux/hash.h>
[NET_SCHED]: Remove unnecessary includes Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-03 13:49:07 +08:00
#include <net/netlink.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <net/act_api.h>
#include <net/pkt_cls.h>
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
#include <linux/netdevice.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
struct tc_u_knode {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_knode __rcu *next;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
u32 handle;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode __rcu *ht_up;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct tcf_exts exts;
#ifdef CONFIG_NET_CLS_IND
net_sched: optimize tcf_match_indev() tcf_match_indev() is called in fast path, it is not wise to search for a netdev by ifindex and then compare by its name, just compare the ifindex. Also, dev->name could be changed by user-space, therefore the match would be always fail, but dev->ifindex could be consistent. BTW, this will also save some bytes from the core struct of u32. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10 08:14:02 +08:00
int ifindex;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
u8 fshift;
struct tcf_result res;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode __rcu *ht_down;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_CLS_U32_PERF
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
struct tc_u32_pcnt __percpu *pf;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
u32 flags;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_CLS_U32_MARK
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
u32 val;
u32 mask;
u32 __percpu *pcpu_success;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tcf_proto *tp;
net_sched: use tcf_queue_work() in u32 filter Defer the tcf_exts_destroy() in RCU callback to tc filter workqueue and get RTNL lock. Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-27 09:24:36 +08:00
union {
struct work_struct work;
struct rcu_head rcu;
};
net: sched: cls_u32: rcu can not be last node tc_u32_sel 'sel' in tc_u_knode expects to be the last element in the structure and pads the structure with tc_u32_key fields for each key. kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL) CC: Eric Dumazet <edumazet@google.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-18 02:11:46 +08:00
/* The 'sel' field MUST be the last field in structure to allow for
* tc_u32_keys allocated at end of structure.
*/
struct tc_u32_sel sel;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
};
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
struct tc_u_hnode {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode __rcu *next;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
u32 handle;
u32 prio;
struct tc_u_common *tp_c;
int refcnt;
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
unsigned int divisor;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct rcu_head rcu;
net_sched: fix struct tc_u_hnode layout in u32 We dynamically allocate divisor+1 entries for ->ht[] in tc_u_hnode: ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL); So ->ht is supposed to be the last field of this struct, however this is broken, since an rcu head is appended after it. Fixes: 1ce87720d456 ("net: sched: make cls_u32 lockless") Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-10 08:03:40 +08:00
/* The 'ht' field MUST be the last field in structure to allow for
* more entries allocated at end of structure.
*/
struct tc_u_knode __rcu *ht[1];
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
};
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
struct tc_u_common {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode __rcu *hlist;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct Qdisc *q;
int refcnt;
u32 hgenerator;
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
struct hlist_node hnode;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct rcu_head rcu;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
};
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
static inline unsigned int u32_hash_fold(__be32 key,
const struct tc_u32_sel *sel,
u8 fshift)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
unsigned int h = ntohl(key & sel->hmask) >> fshift;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return h;
}
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct {
struct tc_u_knode *knode;
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
unsigned int off;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} stack[TC_U32_MAXDEPTH];
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode *ht = rcu_dereference_bh(tp->root);
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
unsigned int off = skb_network_offset(skb);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct tc_u_knode *n;
int sdepth = 0;
int off2 = 0;
int sel = 0;
#ifdef CONFIG_CLS_U32_PERF
int j;
#endif
int i, r;
next_ht:
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
n = rcu_dereference_bh(ht->ht[sel]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
next_knode:
if (n) {
struct tc_u32_key *key = n->sel.keys;
#ifdef CONFIG_CLS_U32_PERF
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
__this_cpu_inc(n->pf->rcnt);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
j = 0;
#endif
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
if (tc_skip_sw(n->flags)) {
n = rcu_dereference_bh(n->next);
goto next_knode;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_CLS_U32_MARK
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
if ((skb->mark & n->mask) != n->val) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
n = rcu_dereference_bh(n->next);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto next_knode;
} else {
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
__this_cpu_inc(*n->pcpu_success);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
#endif
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
for (i = n->sel.nkeys; i > 0; i--, key++) {
u32: negative offset fix It was possible to use a negative offset in a u32 match to reference the ethernet header or other parts of the link layer header. This fixes the regression caused by: commit fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d Author: Changli Gao <xiaosuo@gmail.com> Date: Wed Jun 2 07:32:42 2010 -0700 cls_u32: use skb_header_pointer() to dereference data safely Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-08-02 21:44:13 +08:00
int toff = off + key->off + (off2 & key->offmask);
cls_u32: fix sparse warnings The variable _data is used in asm-generic to define sections which causes sparse warnings, so just rename the variable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-21 00:14:23 +08:00
__be32 *data, hdata;
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
cls_u32: signedness bug skb_headroom() is unsigned so "skb_headroom(skb) + toff" is also unsigned and can't be less than zero. This test was added in 66d50d25: "u32: negative offset fix" It was supposed to fix a regression. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-04 10:28:36 +08:00
if (skb_headroom(skb) + toff > INT_MAX)
u32: negative offset fix It was possible to use a negative offset in a u32 match to reference the ethernet header or other parts of the link layer header. This fixes the regression caused by: commit fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d Author: Changli Gao <xiaosuo@gmail.com> Date: Wed Jun 2 07:32:42 2010 -0700 cls_u32: use skb_header_pointer() to dereference data safely Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-08-02 21:44:13 +08:00
goto out;
cls_u32: fix sparse warnings The variable _data is used in asm-generic to define sections which causes sparse warnings, so just rename the variable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-21 00:14:23 +08:00
data = skb_header_pointer(skb, toff, 4, &hdata);
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
if (!data)
goto out;
if ((*data ^ key->val) & key->mask) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
n = rcu_dereference_bh(n->next);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto next_knode;
}
#ifdef CONFIG_CLS_U32_PERF
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
__this_cpu_inc(n->pf->kcnts[j]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
j++;
#endif
}
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht = rcu_dereference_bh(n->ht_down);
if (!ht) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
check_terminal:
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
if (n->sel.flags & TC_U32_TERMINAL) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*res = n->res;
#ifdef CONFIG_NET_CLS_IND
net_sched: optimize tcf_match_indev() tcf_match_indev() is called in fast path, it is not wise to search for a netdev by ifindex and then compare by its name, just compare the ifindex. Also, dev->name could be changed by user-space, therefore the match would be always fail, but dev->ifindex could be consistent. BTW, this will also save some bytes from the core struct of u32. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10 08:14:02 +08:00
if (!tcf_match_indev(skb, n->ifindex)) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
n = rcu_dereference_bh(n->next);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto next_knode;
}
#endif
#ifdef CONFIG_CLS_U32_PERF
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
__this_cpu_inc(n->pf->rhit);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
r = tcf_exts_exec(skb, &n->exts, res);
if (r < 0) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
n = rcu_dereference_bh(n->next);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto next_knode;
}
return r;
}
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
n = rcu_dereference_bh(n->next);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto next_knode;
}
/* PUSH */
if (sdepth >= TC_U32_MAXDEPTH)
goto deadloop;
stack[sdepth].knode = n;
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
stack[sdepth].off = off;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sdepth++;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht = rcu_dereference_bh(n->ht_down);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sel = 0;
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
if (ht->divisor) {
cls_u32: fix sparse warnings The variable _data is used in asm-generic to define sections which causes sparse warnings, so just rename the variable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-21 00:14:23 +08:00
__be32 *data, hdata;
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
data = skb_header_pointer(skb, off + n->sel.hoff, 4,
cls_u32: fix sparse warnings The variable _data is used in asm-generic to define sections which causes sparse warnings, so just rename the variable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-21 00:14:23 +08:00
&hdata);
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
if (!data)
goto out;
sel = ht->divisor & u32_hash_fold(*data, &n->sel,
n->fshift);
}
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT)))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto next_ht;
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
off2 = n->sel.off + 3;
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
if (n->sel.flags & TC_U32_VAROFFSET) {
cls_u32: fix sparse warnings The variable _data is used in asm-generic to define sections which causes sparse warnings, so just rename the variable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-21 00:14:23 +08:00
__be16 *data, hdata;
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
data = skb_header_pointer(skb,
off + n->sel.offoff,
cls_u32: fix sparse warnings The variable _data is used in asm-generic to define sections which causes sparse warnings, so just rename the variable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-21 00:14:23 +08:00
2, &hdata);
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
if (!data)
goto out;
off2 += ntohs(n->sel.offmask & *data) >>
n->sel.offshift;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
off2 &= ~3;
}
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
if (n->sel.flags & TC_U32_EAT) {
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
off += off2;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
off2 = 0;
}
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
if (off < skb->len)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto next_ht;
}
/* POP */
if (sdepth--) {
n = stack[sdepth].knode;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht = rcu_dereference_bh(n->ht_up);
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
off = stack[sdepth].off;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto check_terminal;
}
cls_u32: use skb_header_pointer() to dereference data safely use skb_header_pointer() to dereference data safely the original skb->data dereference isn't safe, as there isn't any skb->len or skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch. And when the skb isn't long enough, we terminate the function u32_classify() immediately with -1. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02 22:32:42 +08:00
out:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -1;
deadloop:
net: Convert net_ratelimit uses to net_<level>_ratelimited Standardize the net core ratelimited logging functions. Coalesce formats, align arguments. Change a printk then vprintk sequence to use printf extension %pV. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-14 05:56:26 +08:00
net_warn_ratelimited("cls_u32: dead loop\n");
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -1;
}
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
static struct tc_u_hnode *u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct tc_u_hnode *ht;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
for (ht = rtnl_dereference(tp_c->hlist);
ht;
ht = rtnl_dereference(ht->next))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (ht->handle == handle)
break;
return ht;
}
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
static struct tc_u_knode *u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
unsigned int sel;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct tc_u_knode *n = NULL;
sel = TC_U32_HASH(handle);
if (sel > ht->divisor)
goto out;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
for (n = rtnl_dereference(ht->ht[sel]);
n;
n = rtnl_dereference(n->next))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (n->handle == handle)
break;
out:
return n;
}
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
static void *u32_get(struct tcf_proto *tp, u32 handle)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct tc_u_hnode *ht;
struct tc_u_common *tp_c = tp->data;
if (TC_U32_HTID(handle) == TC_U32_ROOT)
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht = rtnl_dereference(tp->root);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
else
ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
if (!ht)
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
return NULL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (TC_U32_KEY(handle) == 0)
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
return ht;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
return u32_lookup_key(ht, handle);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
static u32 gen_new_htid(struct tc_u_common *tp_c)
{
int i = 0x800;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
/* hgenerator only used inside rtnl lock it is safe to increment
* without read _copy_ update semantics
*/
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
do {
if (++tp_c->hgenerator == 0x7FF)
tp_c->hgenerator = 1;
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
} while (--i > 0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
}
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
static struct hlist_head *tc_u_common_hash;
#define U32_HASH_SHIFT 10
#define U32_HASH_SIZE (1 << U32_HASH_SHIFT)
static unsigned int tc_u_hash(const struct tcf_proto *tp)
{
struct net_device *dev = tp->q->dev_queue->dev;
u32 qhandle = tp->q->handle;
int ifindex = dev->ifindex;
return hash_64((u64)ifindex << 32 | qhandle, U32_HASH_SHIFT);
}
static struct tc_u_common *tc_u_common_find(const struct tcf_proto *tp)
{
struct tc_u_common *tc;
unsigned int h;
h = tc_u_hash(tp);
hlist_for_each_entry(tc, &tc_u_common_hash[h], hnode) {
if (tc->q == tp->q)
return tc;
}
return NULL;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
static int u32_init(struct tcf_proto *tp)
{
struct tc_u_hnode *root_ht;
struct tc_u_common *tp_c;
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
unsigned int h;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
tp_c = tc_u_common_find(tp);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[NET]: Conversions from kmalloc+memset to k(z|c)alloc. Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-22 05:51:30 +08:00
root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (root_ht == NULL)
return -ENOBUFS;
root_ht->refcnt++;
root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
root_ht->prio = tp->prio;
if (tp_c == NULL) {
[NET]: Conversions from kmalloc+memset to k(z|c)alloc. Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-22 05:51:30 +08:00
tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (tp_c == NULL) {
kfree(root_ht);
return -ENOBUFS;
}
tp_c->q = tp->q;
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
INIT_HLIST_NODE(&tp_c->hnode);
h = tc_u_hash(tp);
hlist_add_head(&tp_c->hnode, &tc_u_common_hash[h]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
tp_c->refcnt++;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
RCU_INIT_POINTER(root_ht->next, tp_c->hlist);
rcu_assign_pointer(tp_c->hlist, root_ht);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
root_ht->tp_c = tp_c;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
rcu_assign_pointer(tp->root, root_ht);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
tp->data = tp_c;
return 0;
}
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n,
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
bool free_pf)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
net_sched: remove the first parameter from tcf_exts_destroy() Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <hadi@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-26 01:26:37 +08:00
tcf_exts_destroy(&n->exts);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (n->ht_down)
n->ht_down->refcnt--;
#ifdef CONFIG_CLS_U32_PERF
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
if (free_pf)
free_percpu(n->pf);
net: cls_u32: fix missed pcpu_success free_percpu This fixes a missed free_percpu in the unwind code path and when keys are destroyed. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:04 +08:00
#endif
#ifdef CONFIG_CLS_U32_MARK
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
if (free_pf)
free_percpu(n->pcpu_success);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
kfree(n);
return 0;
}
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
/* u32_delete_key_rcu should be called when free'ing a copied
* version of a tc_u_knode obtained from u32_init_knode(). When
* copies are obtained from u32_init_knode() the statistics are
* shared between the old and new copies to allow readers to
* continue to update the statistics during the copy. To support
* this the u32_delete_key_rcu variant does not free the percpu
* statistics.
*/
net_sched: use tcf_queue_work() in u32 filter Defer the tcf_exts_destroy() in RCU callback to tc filter workqueue and get RTNL lock. Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-27 09:24:36 +08:00
static void u32_delete_key_work(struct work_struct *work)
{
struct tc_u_knode *key = container_of(work, struct tc_u_knode, work);
rtnl_lock();
u32_destroy_key(key->tp, key, false);
rtnl_unlock();
}
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
static void u32_delete_key_rcu(struct rcu_head *rcu)
{
struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);
net_sched: use tcf_queue_work() in u32 filter Defer the tcf_exts_destroy() in RCU callback to tc filter workqueue and get RTNL lock. Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-27 09:24:36 +08:00
INIT_WORK(&key->work, u32_delete_key_work);
tcf_queue_work(&key->work);
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
}
/* u32_delete_key_freepf_rcu is the rcu callback variant
* that free's the entire structure including the statistics
* percpu variables. Only use this if the key is not a copy
* returned by u32_init_knode(). See u32_delete_key_rcu()
* for the variant that should be used with keys return from
* u32_init_knode()
*/
net_sched: use tcf_queue_work() in u32 filter Defer the tcf_exts_destroy() in RCU callback to tc filter workqueue and get RTNL lock. Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-27 09:24:36 +08:00
static void u32_delete_key_freepf_work(struct work_struct *work)
{
struct tc_u_knode *key = container_of(work, struct tc_u_knode, work);
rtnl_lock();
u32_destroy_key(key->tp, key, true);
rtnl_unlock();
}
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
static void u32_delete_key_freepf_rcu(struct rcu_head *rcu)
{
struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);
net_sched: use tcf_queue_work() in u32 filter Defer the tcf_exts_destroy() in RCU callback to tc filter workqueue and get RTNL lock. Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-27 09:24:36 +08:00
INIT_WORK(&key->work, u32_delete_key_freepf_work);
tcf_queue_work(&key->work);
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
}
net_sched: change "foo* bar" to "foo *bar" "foo* bar" or "foo * bar" should be "foo *bar". Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-10 20:55:31 +08:00
static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_knode __rcu **kp;
struct tc_u_knode *pkp;
net: sched: cls_u32 add missing rcu_assign_pointer and annotation Add missing rcu_assign_pointer and missing annotation for ht_up in cls_u32.c Caught by kbuild bot, >> net/sched/cls_u32.c:378:36: sparse: incorrect type in initializer (different address spaces) net/sched/cls_u32.c:378:36: expected struct tc_u_hnode *ht net/sched/cls_u32.c:378:36: got struct tc_u_hnode [noderef] <asn:4>*ht_up >> net/sched/cls_u32.c:610:54: sparse: incorrect type in argument 4 (different address spaces) net/sched/cls_u32.c:610:54: expected struct tc_u_hnode *ht net/sched/cls_u32.c:610:54: got struct tc_u_hnode [noderef] <asn:4>*ht_up >> net/sched/cls_u32.c:684:18: sparse: incorrect type in assignment (different address spaces) net/sched/cls_u32.c:684:18: expected struct tc_u_hnode [noderef] <asn:4>*ht_up net/sched/cls_u32.c:684:18: got struct tc_u_hnode *[assigned] ht >> net/sched/cls_u32.c:359:18: sparse: dereference of noderef expression Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16 14:30:49 +08:00
struct tc_u_hnode *ht = rtnl_dereference(key->ht_up);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (ht) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
kp = &ht->ht[TC_U32_HASH(key->handle)];
for (pkp = rtnl_dereference(*kp); pkp;
kp = &pkp->next, pkp = rtnl_dereference(*kp)) {
if (pkp == key) {
RCU_INIT_POINTER(*kp, key->next);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: avoid calling tcf_unbind_filter() in call_rcu callback This fixes the following crash: [ 63.976822] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 63.980094] CPU: 1 PID: 15 Comm: ksoftirqd/1 Not tainted 3.17.0-rc6+ #648 [ 63.980094] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 63.980094] task: ffff880117dea690 ti: ffff880117dfc000 task.ti: ffff880117dfc000 [ 63.980094] RIP: 0010:[<ffffffff817e6d07>] [<ffffffff817e6d07>] u32_destroy_key+0x27/0x6d [ 63.980094] RSP: 0018:ffff880117dffcc0 EFLAGS: 00010202 [ 63.980094] RAX: ffff880117dea690 RBX: ffff8800d02e0820 RCX: 0000000000000000 [ 63.980094] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 6b6b6b6b6b6b6b6b [ 63.980094] RBP: ffff880117dffcd0 R08: 0000000000000000 R09: 0000000000000000 [ 63.980094] R10: 00006c0900006ba8 R11: 00006ba100006b9d R12: 0000000000000001 [ 63.980094] R13: ffff8800d02e0898 R14: ffffffff817e6d4d R15: ffff880117387a30 [ 63.980094] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 63.980094] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 63.980094] CR2: 00007f07e6732fed CR3: 000000011665b000 CR4: 00000000000006e0 [ 63.980094] Stack: [ 63.980094] ffff88011a9cd300 ffffffff82051ac0 ffff880117dffce0 ffffffff817e6d68 [ 63.980094] ffff880117dffd70 ffffffff810cb4c7 ffffffff810cb3cd ffff880117dfffd8 [ 63.980094] ffff880117dea690 ffff880117dea690 ffff880117dfffd8 000000000000000a [ 63.980094] Call Trace: [ 63.980094] [<ffffffff817e6d68>] u32_delete_key_freepf_rcu+0x1b/0x1d [ 63.980094] [<ffffffff810cb4c7>] rcu_process_callbacks+0x3bb/0x691 [ 63.980094] [<ffffffff810cb3cd>] ? rcu_process_callbacks+0x2c1/0x691 [ 63.980094] [<ffffffff817e6d4d>] ? u32_destroy_key+0x6d/0x6d [ 63.980094] [<ffffffff810780a4>] __do_softirq+0x142/0x323 [ 63.980094] [<ffffffff810782a8>] run_ksoftirqd+0x23/0x53 [ 63.980094] [<ffffffff81092126>] smpboot_thread_fn+0x203/0x221 [ 63.980094] [<ffffffff81091f23>] ? smpboot_unpark_thread+0x33/0x33 [ 63.980094] [<ffffffff8108e44d>] kthread+0xc9/0xd1 [ 63.980094] [<ffffffff819e00ea>] ? do_wait_for_common+0xf8/0x125 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 [ 63.980094] [<ffffffff819e43ec>] ret_from_fork+0x7c/0xb0 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 tp could be freed in call_rcu callback too, the order is not guaranteed. John Fastabend says: ==================== Its worth noting why this is safe. Any running schedulers will either read the valid class field or it will be zeroed. All schedulers today when the class is 0 do a lookup using the same call used by the tcf_exts_bind(). So even if we have a running classifier hit the null class pointer it will do a lookup and get to the same result. This is particularly fragile at the moment because the only way to verify this is to audit the schedulers call sites. ==================== Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-01 07:07:24 +08:00
tcf_unbind_filter(tp, &key->res);
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
call_rcu(&key->rcu, u32_delete_key_freepf_rcu);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
}
}
net: convert BUG_TRAP to generic WARN_ON Removes legacy reinvent-the-wheel type thing. The generic machinery integrates much better to automated debugging aids such as kerneloops.org (and others), and is unambiguous due to better naming. Non-intuively BUG_TRAP() is actually equal to WARN_ON() rather than BUG_ON() though some might actually be promoted to BUG_ON() but I left that to future. I could make at least one BUILD_BUG_ON conversion. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-26 12:43:18 +08:00
WARN_ON(1);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
static void u32_remove_hw_knode(struct tcf_proto *tp, u32 handle)
{
struct net_device *dev = tp->q->dev_queue->dev;
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
struct tc_cls_u32_offload cls_u32 = {};
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: remove cops->tcf_cl_offload cops->tcf_cl_offload is no longer needed, as the drivers check what they can and cannot offload using the classid identify helpers. So remove this. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-09 20:30:35 +08:00
if (!tc_should_offload(dev, 0))
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
return;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
tc_cls_common_offload_init(&cls_u32.common, tp);
cls_u32.command = TC_CLSU32_DELETE_KNODE;
cls_u32.knode.handle = handle;
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSU32, &cls_u32);
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
}
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
static int u32_replace_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h,
u32 flags)
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
{
struct net_device *dev = tp->q->dev_queue->dev;
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
struct tc_cls_u32_offload cls_u32 = {};
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
int err;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: remove cops->tcf_cl_offload cops->tcf_cl_offload is no longer needed, as the drivers check what they can and cannot offload using the classid identify helpers. So remove this. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-09 20:30:35 +08:00
if (!tc_should_offload(dev, flags))
net: cls_u32: be more strict about skip-sw flag Return an error if user requested skip-sw and the underlaying hardware cannot handle tc offloads (or offloads are disabled). Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-06 23:16:48 +08:00
return tc_skip_sw(flags) ? -EINVAL : 0;
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
tc_cls_common_offload_init(&cls_u32.common, tp);
cls_u32.command = TC_CLSU32_NEW_HNODE;
cls_u32.hnode.divisor = h->divisor;
cls_u32.hnode.handle = h->handle;
cls_u32.hnode.prio = h->prio;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSU32, &cls_u32);
net: cls_u32: be more strict about skip-sw flag Return an error if user requested skip-sw and the underlaying hardware cannot handle tc offloads (or offloads are disabled). Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-06 23:16:48 +08:00
if (tc_skip_sw(flags))
return err;
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
return 0;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
}
static void u32_clear_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h)
{
struct net_device *dev = tp->q->dev_queue->dev;
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
struct tc_cls_u32_offload cls_u32 = {};
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: remove cops->tcf_cl_offload cops->tcf_cl_offload is no longer needed, as the drivers check what they can and cannot offload using the classid identify helpers. So remove this. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-09 20:30:35 +08:00
if (!tc_should_offload(dev, 0))
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
return;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
tc_cls_common_offload_init(&cls_u32.common, tp);
cls_u32.command = TC_CLSU32_DELETE_HNODE;
cls_u32.hnode.divisor = h->divisor;
cls_u32.hnode.handle = h->handle;
cls_u32.hnode.prio = h->prio;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSU32, &cls_u32);
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
}
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
static int u32_replace_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n,
u32 flags)
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
{
struct net_device *dev = tp->q->dev_queue->dev;
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
struct tc_cls_u32_offload cls_u32 = {};
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
int err;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
net: sched: remove cops->tcf_cl_offload cops->tcf_cl_offload is no longer needed, as the drivers check what they can and cannot offload using the classid identify helpers. So remove this. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-09 20:30:35 +08:00
if (!tc_should_offload(dev, flags))
net: cls_u32: be more strict about skip-sw flag for knodes Return an error if user requested skip-sw and the underlaying hardware cannot handle tc offloads (or offloads are disabled). This patch fixes the knode handling. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-09 03:11:04 +08:00
return tc_skip_sw(flags) ? -EINVAL : 0;
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
tc_cls_common_offload_init(&cls_u32.common, tp);
cls_u32.command = TC_CLSU32_REPLACE_KNODE;
cls_u32.knode.handle = n->handle;
cls_u32.knode.fshift = n->fshift;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
#ifdef CONFIG_CLS_U32_MARK
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
cls_u32.knode.val = n->val;
cls_u32.knode.mask = n->mask;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
#else
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
cls_u32.knode.val = 0;
cls_u32.knode.mask = 0;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
#endif
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
cls_u32.knode.sel = &n->sel;
cls_u32.knode.exts = &n->exts;
net: cls_u32: be more strict about skip-sw flag for knodes Return an error if user requested skip-sw and the underlaying hardware cannot handle tc offloads (or offloads are disabled). This patch fixes the knode handling. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-09 03:11:04 +08:00
if (n->ht_down)
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
cls_u32.knode.link_handle = n->ht_down->handle;
net: cls_u32: be more strict about skip-sw flag for knodes Return an error if user requested skip-sw and the underlaying hardware cannot handle tc offloads (or offloads are disabled). This patch fixes the knode handling. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-09 03:11:04 +08:00
net: sched: get rid of struct tc_to_netdev Get rid of struct tc_to_netdev which is now just unnecessary container and rather pass per-type structures down to drivers directly. Along with that, consolidate the naming of per-type structure variables in cls_*. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07 16:15:32 +08:00
err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSU32, &cls_u32);
net/sched: cls_u32: Reflect HW offload status U32 support for the "in hw" offloading flags. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Reviewed-by: Amir Vadai <amir@vadai.me> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-16 16:31:15 +08:00
if (!err)
n->flags |= TCA_CLS_FLAGS_IN_HW;
net: cls_u32: be more strict about skip-sw flag for knodes Return an error if user requested skip-sw and the underlaying hardware cannot handle tc offloads (or offloads are disabled). This patch fixes the knode handling. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-09 03:11:04 +08:00
if (tc_skip_sw(flags))
return err;
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
return 0;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
}
net_sched: avoid calling tcf_unbind_filter() in call_rcu callback This fixes the following crash: [ 63.976822] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 63.980094] CPU: 1 PID: 15 Comm: ksoftirqd/1 Not tainted 3.17.0-rc6+ #648 [ 63.980094] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 63.980094] task: ffff880117dea690 ti: ffff880117dfc000 task.ti: ffff880117dfc000 [ 63.980094] RIP: 0010:[<ffffffff817e6d07>] [<ffffffff817e6d07>] u32_destroy_key+0x27/0x6d [ 63.980094] RSP: 0018:ffff880117dffcc0 EFLAGS: 00010202 [ 63.980094] RAX: ffff880117dea690 RBX: ffff8800d02e0820 RCX: 0000000000000000 [ 63.980094] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 6b6b6b6b6b6b6b6b [ 63.980094] RBP: ffff880117dffcd0 R08: 0000000000000000 R09: 0000000000000000 [ 63.980094] R10: 00006c0900006ba8 R11: 00006ba100006b9d R12: 0000000000000001 [ 63.980094] R13: ffff8800d02e0898 R14: ffffffff817e6d4d R15: ffff880117387a30 [ 63.980094] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 63.980094] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 63.980094] CR2: 00007f07e6732fed CR3: 000000011665b000 CR4: 00000000000006e0 [ 63.980094] Stack: [ 63.980094] ffff88011a9cd300 ffffffff82051ac0 ffff880117dffce0 ffffffff817e6d68 [ 63.980094] ffff880117dffd70 ffffffff810cb4c7 ffffffff810cb3cd ffff880117dfffd8 [ 63.980094] ffff880117dea690 ffff880117dea690 ffff880117dfffd8 000000000000000a [ 63.980094] Call Trace: [ 63.980094] [<ffffffff817e6d68>] u32_delete_key_freepf_rcu+0x1b/0x1d [ 63.980094] [<ffffffff810cb4c7>] rcu_process_callbacks+0x3bb/0x691 [ 63.980094] [<ffffffff810cb3cd>] ? rcu_process_callbacks+0x2c1/0x691 [ 63.980094] [<ffffffff817e6d4d>] ? u32_destroy_key+0x6d/0x6d [ 63.980094] [<ffffffff810780a4>] __do_softirq+0x142/0x323 [ 63.980094] [<ffffffff810782a8>] run_ksoftirqd+0x23/0x53 [ 63.980094] [<ffffffff81092126>] smpboot_thread_fn+0x203/0x221 [ 63.980094] [<ffffffff81091f23>] ? smpboot_unpark_thread+0x33/0x33 [ 63.980094] [<ffffffff8108e44d>] kthread+0xc9/0xd1 [ 63.980094] [<ffffffff819e00ea>] ? do_wait_for_common+0xf8/0x125 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 [ 63.980094] [<ffffffff819e43ec>] ret_from_fork+0x7c/0xb0 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 tp could be freed in call_rcu callback too, the order is not guaranteed. John Fastabend says: ==================== Its worth noting why this is safe. Any running schedulers will either read the valid class field or it will be zeroed. All schedulers today when the class is 0 do a lookup using the same call used by the tcf_exts_bind(). So even if we have a running classifier hit the null class pointer it will do a lookup and get to the same result. This is particularly fragile at the moment because the only way to verify this is to audit the schedulers call sites. ==================== Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-01 07:07:24 +08:00
static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct tc_u_knode *n;
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
unsigned int h;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
for (h = 0; h <= ht->divisor; h++) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
while ((n = rtnl_dereference(ht->ht[h])) != NULL) {
RCU_INIT_POINTER(ht->ht[h],
rtnl_dereference(n->next));
net_sched: avoid calling tcf_unbind_filter() in call_rcu callback This fixes the following crash: [ 63.976822] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 63.980094] CPU: 1 PID: 15 Comm: ksoftirqd/1 Not tainted 3.17.0-rc6+ #648 [ 63.980094] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 63.980094] task: ffff880117dea690 ti: ffff880117dfc000 task.ti: ffff880117dfc000 [ 63.980094] RIP: 0010:[<ffffffff817e6d07>] [<ffffffff817e6d07>] u32_destroy_key+0x27/0x6d [ 63.980094] RSP: 0018:ffff880117dffcc0 EFLAGS: 00010202 [ 63.980094] RAX: ffff880117dea690 RBX: ffff8800d02e0820 RCX: 0000000000000000 [ 63.980094] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 6b6b6b6b6b6b6b6b [ 63.980094] RBP: ffff880117dffcd0 R08: 0000000000000000 R09: 0000000000000000 [ 63.980094] R10: 00006c0900006ba8 R11: 00006ba100006b9d R12: 0000000000000001 [ 63.980094] R13: ffff8800d02e0898 R14: ffffffff817e6d4d R15: ffff880117387a30 [ 63.980094] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 63.980094] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 63.980094] CR2: 00007f07e6732fed CR3: 000000011665b000 CR4: 00000000000006e0 [ 63.980094] Stack: [ 63.980094] ffff88011a9cd300 ffffffff82051ac0 ffff880117dffce0 ffffffff817e6d68 [ 63.980094] ffff880117dffd70 ffffffff810cb4c7 ffffffff810cb3cd ffff880117dfffd8 [ 63.980094] ffff880117dea690 ffff880117dea690 ffff880117dfffd8 000000000000000a [ 63.980094] Call Trace: [ 63.980094] [<ffffffff817e6d68>] u32_delete_key_freepf_rcu+0x1b/0x1d [ 63.980094] [<ffffffff810cb4c7>] rcu_process_callbacks+0x3bb/0x691 [ 63.980094] [<ffffffff810cb3cd>] ? rcu_process_callbacks+0x2c1/0x691 [ 63.980094] [<ffffffff817e6d4d>] ? u32_destroy_key+0x6d/0x6d [ 63.980094] [<ffffffff810780a4>] __do_softirq+0x142/0x323 [ 63.980094] [<ffffffff810782a8>] run_ksoftirqd+0x23/0x53 [ 63.980094] [<ffffffff81092126>] smpboot_thread_fn+0x203/0x221 [ 63.980094] [<ffffffff81091f23>] ? smpboot_unpark_thread+0x33/0x33 [ 63.980094] [<ffffffff8108e44d>] kthread+0xc9/0xd1 [ 63.980094] [<ffffffff819e00ea>] ? do_wait_for_common+0xf8/0x125 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 [ 63.980094] [<ffffffff819e43ec>] ret_from_fork+0x7c/0xb0 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 tp could be freed in call_rcu callback too, the order is not guaranteed. John Fastabend says: ==================== Its worth noting why this is safe. Any running schedulers will either read the valid class field or it will be zeroed. All schedulers today when the class is 0 do a lookup using the same call used by the tcf_exts_bind(). So even if we have a running classifier hit the null class pointer it will do a lookup and get to the same result. This is particularly fragile at the moment because the only way to verify this is to audit the schedulers call sites. ==================== Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-01 07:07:24 +08:00
tcf_unbind_filter(tp, &n->res);
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
u32_remove_hw_knode(tp, n->handle);
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
call_rcu(&n->rcu, u32_delete_key_freepf_rcu);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
}
static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
{
struct tc_u_common *tp_c = tp->data;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode __rcu **hn;
struct tc_u_hnode *phn;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: convert BUG_TRAP to generic WARN_ON Removes legacy reinvent-the-wheel type thing. The generic machinery integrates much better to automated debugging aids such as kerneloops.org (and others), and is unambiguous due to better naming. Non-intuively BUG_TRAP() is actually equal to WARN_ON() rather than BUG_ON() though some might actually be promoted to BUG_ON() but I left that to future. I could make at least one BUILD_BUG_ON conversion. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-26 12:43:18 +08:00
WARN_ON(ht->refcnt);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: avoid calling tcf_unbind_filter() in call_rcu callback This fixes the following crash: [ 63.976822] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 63.980094] CPU: 1 PID: 15 Comm: ksoftirqd/1 Not tainted 3.17.0-rc6+ #648 [ 63.980094] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 63.980094] task: ffff880117dea690 ti: ffff880117dfc000 task.ti: ffff880117dfc000 [ 63.980094] RIP: 0010:[<ffffffff817e6d07>] [<ffffffff817e6d07>] u32_destroy_key+0x27/0x6d [ 63.980094] RSP: 0018:ffff880117dffcc0 EFLAGS: 00010202 [ 63.980094] RAX: ffff880117dea690 RBX: ffff8800d02e0820 RCX: 0000000000000000 [ 63.980094] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 6b6b6b6b6b6b6b6b [ 63.980094] RBP: ffff880117dffcd0 R08: 0000000000000000 R09: 0000000000000000 [ 63.980094] R10: 00006c0900006ba8 R11: 00006ba100006b9d R12: 0000000000000001 [ 63.980094] R13: ffff8800d02e0898 R14: ffffffff817e6d4d R15: ffff880117387a30 [ 63.980094] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 63.980094] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 63.980094] CR2: 00007f07e6732fed CR3: 000000011665b000 CR4: 00000000000006e0 [ 63.980094] Stack: [ 63.980094] ffff88011a9cd300 ffffffff82051ac0 ffff880117dffce0 ffffffff817e6d68 [ 63.980094] ffff880117dffd70 ffffffff810cb4c7 ffffffff810cb3cd ffff880117dfffd8 [ 63.980094] ffff880117dea690 ffff880117dea690 ffff880117dfffd8 000000000000000a [ 63.980094] Call Trace: [ 63.980094] [<ffffffff817e6d68>] u32_delete_key_freepf_rcu+0x1b/0x1d [ 63.980094] [<ffffffff810cb4c7>] rcu_process_callbacks+0x3bb/0x691 [ 63.980094] [<ffffffff810cb3cd>] ? rcu_process_callbacks+0x2c1/0x691 [ 63.980094] [<ffffffff817e6d4d>] ? u32_destroy_key+0x6d/0x6d [ 63.980094] [<ffffffff810780a4>] __do_softirq+0x142/0x323 [ 63.980094] [<ffffffff810782a8>] run_ksoftirqd+0x23/0x53 [ 63.980094] [<ffffffff81092126>] smpboot_thread_fn+0x203/0x221 [ 63.980094] [<ffffffff81091f23>] ? smpboot_unpark_thread+0x33/0x33 [ 63.980094] [<ffffffff8108e44d>] kthread+0xc9/0xd1 [ 63.980094] [<ffffffff819e00ea>] ? do_wait_for_common+0xf8/0x125 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 [ 63.980094] [<ffffffff819e43ec>] ret_from_fork+0x7c/0xb0 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 tp could be freed in call_rcu callback too, the order is not guaranteed. John Fastabend says: ==================== Its worth noting why this is safe. Any running schedulers will either read the valid class field or it will be zeroed. All schedulers today when the class is 0 do a lookup using the same call used by the tcf_exts_bind(). So even if we have a running classifier hit the null class pointer it will do a lookup and get to the same result. This is particularly fragile at the moment because the only way to verify this is to audit the schedulers call sites. ==================== Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-01 07:07:24 +08:00
u32_clear_hnode(tp, ht);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
hn = &tp_c->hlist;
for (phn = rtnl_dereference(*hn);
phn;
hn = &phn->next, phn = rtnl_dereference(*hn)) {
if (phn == ht) {
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
u32_clear_hw_hnode(tp, ht);
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
RCU_INIT_POINTER(*hn, ht->next);
kfree_rcu(ht, rcu);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
}
return -ENOENT;
}
net_sched: destroy proto tp when all filters are gone Kernel automatically creates a tp for each (kind, protocol, priority) tuple, which has handle 0, when we add a new filter, but it still is left there after we remove our own, unless we don't specify the handle (literally means all the filters under the tuple). For example this one is left: # tc filter show dev eth0 filter parent 8001: protocol arp pref 49152 basic The user-space is hard to clean up these for kernel because filters like u32 are organized in a complex way. So kernel is responsible to remove it after all filters are gone. Each type of filter has its own way to store the filters, so each type has to provide its way to check if all filters are gone. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim<jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-07 03:47:59 +08:00
static bool ht_empty(struct tc_u_hnode *ht)
{
unsigned int h;
for (h = 0; h <= ht->divisor; h++)
if (rcu_access_pointer(ht->ht[h]))
return false;
return true;
}
net_sched: move the empty tp check from ->destroy() to ->delete() We could have a race condition where in ->classify() path we dereference tp->root and meanwhile a parallel ->destroy() makes it a NULL. Daniel cured this bug in commit d936377414fa ("net, sched: respect rcu grace period on cls destruction"). This happens when ->destroy() is called for deleting a filter to check if we are the last one in tp, this tp is still linked and visible at that time. The root cause of this problem is the semantic of ->destroy(), it does two things (for non-force case): 1) check if tp is empty 2) if tp is empty we could really destroy it and its caller, if cares, needs to check its return value to see if it is really destroyed. Therefore we can't unlink tp unless we know it is empty. As suggested by Daniel, we could actually move the test logic to ->delete() so that we can safely unlink tp after ->delete() tells us the last one is just deleted and before ->destroy(). Fixes: 1e052be69d04 ("net_sched: destroy proto tp when all filters are gone") Cc: Roi Dayan <roid@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-20 05:21:21 +08:00
static void u32_destroy(struct tcf_proto *tp)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct tc_u_common *tp_c = tp->data;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode *root_ht = rtnl_dereference(tp->root);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: convert BUG_TRAP to generic WARN_ON Removes legacy reinvent-the-wheel type thing. The generic machinery integrates much better to automated debugging aids such as kerneloops.org (and others), and is unambiguous due to better naming. Non-intuively BUG_TRAP() is actually equal to WARN_ON() rather than BUG_ON() though some might actually be promoted to BUG_ON() but I left that to future. I could make at least one BUILD_BUG_ON conversion. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-26 12:43:18 +08:00
WARN_ON(root_ht == NULL);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (root_ht && --root_ht->refcnt == 0)
u32_destroy_hnode(tp, root_ht);
if (--tp_c->refcnt == 0) {
struct tc_u_hnode *ht;
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
hlist_del(&tp_c->hnode);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
for (ht = rtnl_dereference(tp_c->hlist);
ht;
ht = rtnl_dereference(ht->next)) {
[NET_SCHED] cls_u32: refcounting fix for u32_delete() Deleting of nonroot hnodes mostly doesn't work in u32_delete(): refcnt == 1 is expected, but such hnodes' refcnts are initialized with 0 and charged only with "link" nodes. Now they'll start with 1 like usual. Thanks to Patrick McHardy for an improving suggestion. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-13 09:37:13 +08:00
ht->refcnt--;
net_sched: avoid calling tcf_unbind_filter() in call_rcu callback This fixes the following crash: [ 63.976822] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 63.980094] CPU: 1 PID: 15 Comm: ksoftirqd/1 Not tainted 3.17.0-rc6+ #648 [ 63.980094] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 63.980094] task: ffff880117dea690 ti: ffff880117dfc000 task.ti: ffff880117dfc000 [ 63.980094] RIP: 0010:[<ffffffff817e6d07>] [<ffffffff817e6d07>] u32_destroy_key+0x27/0x6d [ 63.980094] RSP: 0018:ffff880117dffcc0 EFLAGS: 00010202 [ 63.980094] RAX: ffff880117dea690 RBX: ffff8800d02e0820 RCX: 0000000000000000 [ 63.980094] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 6b6b6b6b6b6b6b6b [ 63.980094] RBP: ffff880117dffcd0 R08: 0000000000000000 R09: 0000000000000000 [ 63.980094] R10: 00006c0900006ba8 R11: 00006ba100006b9d R12: 0000000000000001 [ 63.980094] R13: ffff8800d02e0898 R14: ffffffff817e6d4d R15: ffff880117387a30 [ 63.980094] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 63.980094] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 63.980094] CR2: 00007f07e6732fed CR3: 000000011665b000 CR4: 00000000000006e0 [ 63.980094] Stack: [ 63.980094] ffff88011a9cd300 ffffffff82051ac0 ffff880117dffce0 ffffffff817e6d68 [ 63.980094] ffff880117dffd70 ffffffff810cb4c7 ffffffff810cb3cd ffff880117dfffd8 [ 63.980094] ffff880117dea690 ffff880117dea690 ffff880117dfffd8 000000000000000a [ 63.980094] Call Trace: [ 63.980094] [<ffffffff817e6d68>] u32_delete_key_freepf_rcu+0x1b/0x1d [ 63.980094] [<ffffffff810cb4c7>] rcu_process_callbacks+0x3bb/0x691 [ 63.980094] [<ffffffff810cb3cd>] ? rcu_process_callbacks+0x2c1/0x691 [ 63.980094] [<ffffffff817e6d4d>] ? u32_destroy_key+0x6d/0x6d [ 63.980094] [<ffffffff810780a4>] __do_softirq+0x142/0x323 [ 63.980094] [<ffffffff810782a8>] run_ksoftirqd+0x23/0x53 [ 63.980094] [<ffffffff81092126>] smpboot_thread_fn+0x203/0x221 [ 63.980094] [<ffffffff81091f23>] ? smpboot_unpark_thread+0x33/0x33 [ 63.980094] [<ffffffff8108e44d>] kthread+0xc9/0xd1 [ 63.980094] [<ffffffff819e00ea>] ? do_wait_for_common+0xf8/0x125 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 [ 63.980094] [<ffffffff819e43ec>] ret_from_fork+0x7c/0xb0 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 tp could be freed in call_rcu callback too, the order is not guaranteed. John Fastabend says: ==================== Its worth noting why this is safe. Any running schedulers will either read the valid class field or it will be zeroed. All schedulers today when the class is 0 do a lookup using the same call used by the tcf_exts_bind(). So even if we have a running classifier hit the null class pointer it will do a lookup and get to the same result. This is particularly fragile at the moment because the only way to verify this is to audit the schedulers call sites. ==================== Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-01 07:07:24 +08:00
u32_clear_hnode(tp, ht);
[NET_SCHED] cls_u32: refcounting fix for u32_delete() Deleting of nonroot hnodes mostly doesn't work in u32_delete(): refcnt == 1 is expected, but such hnodes' refcnts are initialized with 0 and charged only with "link" nodes. Now they'll start with 1 like usual. Thanks to Patrick McHardy for an improving suggestion. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-13 09:37:13 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
while ((ht = rtnl_dereference(tp_c->hlist)) != NULL) {
RCU_INIT_POINTER(tp_c->hlist, ht->next);
kfree_rcu(ht, rcu);
[NET]: cleanup extra semicolons Spring cleaning time... There seems to be a lot of places in the network code that have extra bogus semicolons after conditionals. Most commonly is a bogus semicolon after: switch() { } Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-21 08:09:22 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
kfree(tp_c);
}
tp->data = NULL;
}
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
static int u32_delete(struct tcf_proto *tp, void *arg, bool *last)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
struct tc_u_hnode *ht = arg;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode *root_ht = rtnl_dereference(tp->root);
net_sched: move the empty tp check from ->destroy() to ->delete() We could have a race condition where in ->classify() path we dereference tp->root and meanwhile a parallel ->destroy() makes it a NULL. Daniel cured this bug in commit d936377414fa ("net, sched: respect rcu grace period on cls destruction"). This happens when ->destroy() is called for deleting a filter to check if we are the last one in tp, this tp is still linked and visible at that time. The root cause of this problem is the semantic of ->destroy(), it does two things (for non-force case): 1) check if tp is empty 2) if tp is empty we could really destroy it and its caller, if cares, needs to check its return value to see if it is really destroyed. Therefore we can't unlink tp unless we know it is empty. As suggested by Daniel, we could actually move the test logic to ->delete() so that we can safely unlink tp after ->delete() tells us the last one is just deleted and before ->destroy(). Fixes: 1e052be69d04 ("net_sched: destroy proto tp when all filters are gone") Cc: Roi Dayan <roid@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-20 05:21:21 +08:00
struct tc_u_common *tp_c = tp->data;
int ret = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (ht == NULL)
net_sched: move the empty tp check from ->destroy() to ->delete() We could have a race condition where in ->classify() path we dereference tp->root and meanwhile a parallel ->destroy() makes it a NULL. Daniel cured this bug in commit d936377414fa ("net, sched: respect rcu grace period on cls destruction"). This happens when ->destroy() is called for deleting a filter to check if we are the last one in tp, this tp is still linked and visible at that time. The root cause of this problem is the semantic of ->destroy(), it does two things (for non-force case): 1) check if tp is empty 2) if tp is empty we could really destroy it and its caller, if cares, needs to check its return value to see if it is really destroyed. Therefore we can't unlink tp unless we know it is empty. As suggested by Daniel, we could actually move the test logic to ->delete() so that we can safely unlink tp after ->delete() tells us the last one is just deleted and before ->destroy(). Fixes: 1e052be69d04 ("net_sched: destroy proto tp when all filters are gone") Cc: Roi Dayan <roid@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-20 05:21:21 +08:00
goto out;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
if (TC_U32_KEY(ht->handle)) {
u32_remove_hw_knode(tp, ht->handle);
net_sched: move the empty tp check from ->destroy() to ->delete() We could have a race condition where in ->classify() path we dereference tp->root and meanwhile a parallel ->destroy() makes it a NULL. Daniel cured this bug in commit d936377414fa ("net, sched: respect rcu grace period on cls destruction"). This happens when ->destroy() is called for deleting a filter to check if we are the last one in tp, this tp is still linked and visible at that time. The root cause of this problem is the semantic of ->destroy(), it does two things (for non-force case): 1) check if tp is empty 2) if tp is empty we could really destroy it and its caller, if cares, needs to check its return value to see if it is really destroyed. Therefore we can't unlink tp unless we know it is empty. As suggested by Daniel, we could actually move the test logic to ->delete() so that we can safely unlink tp after ->delete() tells us the last one is just deleted and before ->destroy(). Fixes: 1e052be69d04 ("net_sched: destroy proto tp when all filters are gone") Cc: Roi Dayan <roid@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-20 05:21:21 +08:00
ret = u32_delete_key(tp, (struct tc_u_knode *)ht);
goto out;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
if (root_ht == ht)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -EINVAL;
[NET_SCHED] cls_u32: refcounting fix for u32_delete() Deleting of nonroot hnodes mostly doesn't work in u32_delete(): refcnt == 1 is expected, but such hnodes' refcnts are initialized with 0 and charged only with "link" nodes. Now they'll start with 1 like usual. Thanks to Patrick McHardy for an improving suggestion. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-13 09:37:13 +08:00
if (ht->refcnt == 1) {
ht->refcnt--;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
u32_destroy_hnode(tp, ht);
[NET_SCHED] cls_u32: refcounting fix for u32_delete() Deleting of nonroot hnodes mostly doesn't work in u32_delete(): refcnt == 1 is expected, but such hnodes' refcnts are initialized with 0 and charged only with "link" nodes. Now they'll start with 1 like usual. Thanks to Patrick McHardy for an improving suggestion. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-13 09:37:13 +08:00
} else {
return -EBUSY;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: move the empty tp check from ->destroy() to ->delete() We could have a race condition where in ->classify() path we dereference tp->root and meanwhile a parallel ->destroy() makes it a NULL. Daniel cured this bug in commit d936377414fa ("net, sched: respect rcu grace period on cls destruction"). This happens when ->destroy() is called for deleting a filter to check if we are the last one in tp, this tp is still linked and visible at that time. The root cause of this problem is the semantic of ->destroy(), it does two things (for non-force case): 1) check if tp is empty 2) if tp is empty we could really destroy it and its caller, if cares, needs to check its return value to see if it is really destroyed. Therefore we can't unlink tp unless we know it is empty. As suggested by Daniel, we could actually move the test logic to ->delete() so that we can safely unlink tp after ->delete() tells us the last one is just deleted and before ->destroy(). Fixes: 1e052be69d04 ("net_sched: destroy proto tp when all filters are gone") Cc: Roi Dayan <roid@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-20 05:21:21 +08:00
out:
*last = true;
if (root_ht) {
if (root_ht->refcnt > 1) {
*last = false;
goto ret;
}
if (root_ht->refcnt == 1) {
if (!ht_empty(root_ht)) {
*last = false;
goto ret;
}
}
}
if (tp_c->refcnt > 1) {
*last = false;
goto ret;
}
if (tp_c->refcnt == 1) {
struct tc_u_hnode *ht;
for (ht = rtnl_dereference(tp_c->hlist);
ht;
ht = rtnl_dereference(ht->next))
if (!ht_empty(ht)) {
*last = false;
break;
}
}
ret:
return ret;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
net_sched: avoid generating same handle for u32 filters When kernel generates a handle for a u32 filter, it tries to start from the max in the bucket. So when we have a filter with the max (fff) handle, it will cause kernel always generates the same handle for new filters. This can be shown by the following command: tc qdisc add dev eth0 ingress tc filter add dev eth0 parent ffff: protocol ip pref 770 handle 800::fff u32 match ip protocol 1 0xff tc filter add dev eth0 parent ffff: protocol ip pref 770 u32 match ip protocol 1 0xff ... we will get some u32 filters with same handle: # tc filter show dev eth0 parent ffff: filter protocol ip pref 770 u32 filter protocol ip pref 770 u32 fh 800: ht divisor 1 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 handles should be unique. This patch fixes it by looking up a bitmap, so that can guarantee the handle is as unique as possible. For compatibility, we still start from 0x800. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-18 08:34:53 +08:00
#define NR_U32_NODE (1<<12)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
{
struct tc_u_knode *n;
net_sched: avoid generating same handle for u32 filters When kernel generates a handle for a u32 filter, it tries to start from the max in the bucket. So when we have a filter with the max (fff) handle, it will cause kernel always generates the same handle for new filters. This can be shown by the following command: tc qdisc add dev eth0 ingress tc filter add dev eth0 parent ffff: protocol ip pref 770 handle 800::fff u32 match ip protocol 1 0xff tc filter add dev eth0 parent ffff: protocol ip pref 770 u32 match ip protocol 1 0xff ... we will get some u32 filters with same handle: # tc filter show dev eth0 parent ffff: filter protocol ip pref 770 u32 filter protocol ip pref 770 u32 fh 800: ht divisor 1 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 handles should be unique. This patch fixes it by looking up a bitmap, so that can guarantee the handle is as unique as possible. For compatibility, we still start from 0x800. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-18 08:34:53 +08:00
unsigned long i;
unsigned long *bitmap = kzalloc(BITS_TO_LONGS(NR_U32_NODE) * sizeof(unsigned long),
GFP_KERNEL);
if (!bitmap)
return handle | 0xFFF;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
for (n = rtnl_dereference(ht->ht[TC_U32_HASH(handle)]);
n;
n = rtnl_dereference(n->next))
net_sched: avoid generating same handle for u32 filters When kernel generates a handle for a u32 filter, it tries to start from the max in the bucket. So when we have a filter with the max (fff) handle, it will cause kernel always generates the same handle for new filters. This can be shown by the following command: tc qdisc add dev eth0 ingress tc filter add dev eth0 parent ffff: protocol ip pref 770 handle 800::fff u32 match ip protocol 1 0xff tc filter add dev eth0 parent ffff: protocol ip pref 770 u32 match ip protocol 1 0xff ... we will get some u32 filters with same handle: # tc filter show dev eth0 parent ffff: filter protocol ip pref 770 u32 filter protocol ip pref 770 u32 fh 800: ht divisor 1 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 handles should be unique. This patch fixes it by looking up a bitmap, so that can guarantee the handle is as unique as possible. For compatibility, we still start from 0x800. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-18 08:34:53 +08:00
set_bit(TC_U32_NODE(n->handle), bitmap);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: avoid generating same handle for u32 filters When kernel generates a handle for a u32 filter, it tries to start from the max in the bucket. So when we have a filter with the max (fff) handle, it will cause kernel always generates the same handle for new filters. This can be shown by the following command: tc qdisc add dev eth0 ingress tc filter add dev eth0 parent ffff: protocol ip pref 770 handle 800::fff u32 match ip protocol 1 0xff tc filter add dev eth0 parent ffff: protocol ip pref 770 u32 match ip protocol 1 0xff ... we will get some u32 filters with same handle: # tc filter show dev eth0 parent ffff: filter protocol ip pref 770 u32 filter protocol ip pref 770 u32 fh 800: ht divisor 1 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 filter protocol ip pref 770 u32 fh 800::fff order 4095 key ht 800 bkt 0 match 00010000/00ff0000 at 8 handles should be unique. This patch fixes it by looking up a bitmap, so that can guarantee the handle is as unique as possible. For compatibility, we still start from 0x800. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-18 08:34:53 +08:00
i = find_next_zero_bit(bitmap, NR_U32_NODE, 0x800);
if (i >= NR_U32_NODE)
i = find_next_zero_bit(bitmap, NR_U32_NODE, 1);
kfree(bitmap);
return handle | (i >= NR_U32_NODE ? 0xFFF : i);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
[NET_SCHED]: Use nla_policy for attribute validation in classifiers Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:36:12 +08:00
static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
[TCA_U32_CLASSID] = { .type = NLA_U32 },
[TCA_U32_HASH] = { .type = NLA_U32 },
[TCA_U32_LINK] = { .type = NLA_U32 },
[TCA_U32_DIVISOR] = { .type = NLA_U32 },
[TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) },
[TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
[TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) },
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
[TCA_U32_FLAGS] = { .type = NLA_U32 },
[NET_SCHED]: Use nla_policy for attribute validation in classifiers Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:36:12 +08:00
};
pkt_sched: namespace aware act_mirred Eric Dumazet pointed out that act_mirred needs to find the current net_ns, and struct net pointer is not provided in the call chain. His original patch made use of current->nsproxy->net_ns to find the network namespace, but this fails to work correctly for userspace code that makes use of netlink sockets in different network namespaces. Instead, pass the "struct net *" down along the call chain to where it is needed. This version removes the ifb changes as Eric has submitted that patch separately, but is otherwise identical to the previous version. Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Tested-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-14 13:15:39 +08:00
static int u32_set_parms(struct net *net, struct tcf_proto *tp,
unsigned long base, struct tc_u_hnode *ht,
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
struct tc_u_knode *n, struct nlattr **tb,
sched, cls: check if we could overwrite actions when changing a filter When actions are attached to a filter, they are a part of the filter itself, so when changing a filter we should allow to overwrite the actions inside as well. In my specific case, when I tried to _append_ a new action to an existing filter which already has an action, I got EEXIST since kernel refused to overwrite the existing one in kernel. This patch checks if we are changing the filter checking NLM_F_CREATE flag (Sigh, filters don't use NLM_F_REPLACE...) and then passes the boolean down to actions. This fixes the problem above. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-26 04:54:06 +08:00
struct nlattr *est, bool ovr)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
net_sched: properly handle failure case of tcf_exts_init() After commit 22dc13c837c3 ("net_sched: convert tcf_exts from list to pointer array") we do dynamic allocation in tcf_exts_init(), therefore we need to handle the ENOMEM case properly. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-20 03:36:54 +08:00
int err;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: cls_u32: no need to call tcf_exts_change for newly allocated struct As the n struct was allocated right before u32_set_parms call, no need to use tcf_exts_change to do atomic change, and we can just fill-up the unused exts struct directly by tcf_exts_validate. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-04 20:29:14 +08:00
err = tcf_exts_validate(net, tp, tb, est, &n->exts, ovr);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (err < 0)
return err;
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
if (tb[TCA_U32_LINK]) {
[NET_SCHED]: Use typeful attribute parsing helpers Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:35:03 +08:00
u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
pkt_sched: remove unnecessary xchg() in packet classifiers The use of xchg() hasn't been necessary since 2.2.something when proper locking was added to packet schedulers. In the case of classifiers they mostly weren't even necessary before that since they're mainly used to assign a NULL pointer to the filter root in the ->destroy path; the root is destroyed immediately after that. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-19 16:03:09 +08:00
struct tc_u_hnode *ht_down = NULL, *ht_old;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (TC_U32_KEY(handle))
net: sched: cls_u32: no need to call tcf_exts_change for newly allocated struct As the n struct was allocated right before u32_set_parms call, no need to use tcf_exts_change to do atomic change, and we can just fill-up the unused exts struct directly by tcf_exts_validate. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-04 20:29:14 +08:00
return -EINVAL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (handle) {
ht_down = u32_lookup_ht(ht->tp_c, handle);
if (ht_down == NULL)
net: sched: cls_u32: no need to call tcf_exts_change for newly allocated struct As the n struct was allocated right before u32_set_parms call, no need to use tcf_exts_change to do atomic change, and we can just fill-up the unused exts struct directly by tcf_exts_validate. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-04 20:29:14 +08:00
return -EINVAL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ht_down->refcnt++;
}
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht_old = rtnl_dereference(n->ht_down);
rcu_assign_pointer(n->ht_down, ht_down);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
pkt_sched: remove unnecessary xchg() in packet classifiers The use of xchg() hasn't been necessary since 2.2.something when proper locking was added to packet schedulers. In the case of classifiers they mostly weren't even necessary before that since they're mainly used to assign a NULL pointer to the filter root in the ->destroy path; the root is destroyed immediately after that. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-19 16:03:09 +08:00
if (ht_old)
ht_old->refcnt--;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
if (tb[TCA_U32_CLASSID]) {
[NET_SCHED]: Use typeful attribute parsing helpers Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:35:03 +08:00
n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
tcf_bind_filter(tp, &n->res, base);
}
#ifdef CONFIG_NET_CLS_IND
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
if (tb[TCA_U32_INDEV]) {
net_sched: optimize tcf_match_indev() tcf_match_indev() is called in fast path, it is not wise to search for a netdev by ifindex and then compare by its name, just compare the ifindex. Also, dev->name could be changed by user-space, therefore the match would be always fail, but dev->ifindex could be consistent. BTW, this will also save some bytes from the core struct of u32. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10 08:14:02 +08:00
int ret;
ret = tcf_change_indev(net, tb[TCA_U32_INDEV]);
if (ret < 0)
net: sched: cls_u32: no need to call tcf_exts_change for newly allocated struct As the n struct was allocated right before u32_set_parms call, no need to use tcf_exts_change to do atomic change, and we can just fill-up the unused exts struct directly by tcf_exts_validate. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-04 20:29:14 +08:00
return -EINVAL;
net_sched: optimize tcf_match_indev() tcf_match_indev() is called in fast path, it is not wise to search for a netdev by ifindex and then compare by its name, just compare the ifindex. Also, dev->name could be changed by user-space, therefore the match would be always fail, but dev->ifindex could be consistent. BTW, this will also save some bytes from the core struct of u32. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10 08:14:02 +08:00
n->ifindex = ret;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
#endif
return 0;
}
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
static void u32_replace_knode(struct tcf_proto *tp, struct tc_u_common *tp_c,
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
struct tc_u_knode *n)
{
struct tc_u_knode __rcu **ins;
struct tc_u_knode *pins;
struct tc_u_hnode *ht;
if (TC_U32_HTID(n->handle) == TC_U32_ROOT)
ht = rtnl_dereference(tp->root);
else
ht = u32_lookup_ht(tp_c, TC_U32_HTID(n->handle));
ins = &ht->ht[TC_U32_HASH(n->handle)];
/* The node must always exist for it to be replaced if this is not the
* case then something went very wrong elsewhere.
*/
for (pins = rtnl_dereference(*ins); ;
ins = &pins->next, pins = rtnl_dereference(*ins))
if (pins->handle == n->handle)
break;
RCU_INIT_POINTER(n->next, pins->next);
rcu_assign_pointer(*ins, n);
}
static struct tc_u_knode *u32_init_knode(struct tcf_proto *tp,
struct tc_u_knode *n)
{
struct tc_u_knode *new;
struct tc_u32_sel *s = &n->sel;
new = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key),
GFP_KERNEL);
if (!new)
return NULL;
RCU_INIT_POINTER(new->next, n->next);
new->handle = n->handle;
RCU_INIT_POINTER(new->ht_up, n->ht_up);
#ifdef CONFIG_NET_CLS_IND
new->ifindex = n->ifindex;
#endif
new->fshift = n->fshift;
new->res = n->res;
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
new->flags = n->flags;
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
RCU_INIT_POINTER(new->ht_down, n->ht_down);
/* bump reference count as long as we hold pointer to structure */
if (new->ht_down)
new->ht_down->refcnt++;
#ifdef CONFIG_CLS_U32_PERF
/* Statistics may be incremented by readers during update
* so we must keep them in tact. When the node is later destroyed
* a special destroy call must be made to not free the pf memory.
*/
new->pf = n->pf;
#endif
#ifdef CONFIG_CLS_U32_MARK
new->val = n->val;
new->mask = n->mask;
/* Similarly success statistics must be moved as pointers */
new->pcpu_success = n->pcpu_success;
#endif
new->tp = tp;
memcpy(&new->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
net_sched: properly handle failure case of tcf_exts_init() After commit 22dc13c837c3 ("net_sched: convert tcf_exts from list to pointer array") we do dynamic allocation in tcf_exts_init(), therefore we need to handle the ENOMEM case properly. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-20 03:36:54 +08:00
if (tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE)) {
kfree(new);
return NULL;
}
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
return new;
}
pkt_sched: namespace aware act_mirred Eric Dumazet pointed out that act_mirred needs to find the current net_ns, and struct net pointer is not provided in the call chain. His original patch made use of current->nsproxy->net_ns to find the network namespace, but this fails to work correctly for userspace code that makes use of netlink sockets in different network namespaces. Instead, pass the "struct net *" down along the call chain to where it is needed. This version removes the ifb changes as Eric has submitted that patch separately, but is otherwise identical to the previous version. Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Tested-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-14 13:15:39 +08:00
static int u32_change(struct net *net, struct sk_buff *in_skb,
net sched: Pass the skb into change so it can access NETLINK_CB cls_flow.c plays with uids and gids. Unless I misread that code it is possible for classifiers to depend on the specific uid and gid values. Therefore I need to know the user namespace of the netlink socket that is installing the packet classifiers. Pass in the rtnetlink skb so I can access the NETLINK_CB of the passed packet. In particular I want access to sk_user_ns(NETLINK_CB(in_skb).ssk). Pass in not the user namespace but the incomming rtnetlink skb into the the classifier change routines as that is generally the more useful parameter. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2012-05-26 03:42:45 +08:00
struct tcf_proto *tp, unsigned long base, u32 handle,
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
struct nlattr **tca, void **arg, bool ovr)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct tc_u_common *tp_c = tp->data;
struct tc_u_hnode *ht;
struct tc_u_knode *n;
struct tc_u32_sel *s;
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
struct nlattr *opt = tca[TCA_OPTIONS];
struct nlattr *tb[TCA_U32_MAX + 1];
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
u32 htid, flags = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int err;
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
#ifdef CONFIG_CLS_U32_PERF
size_t size;
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (opt == NULL)
return handle ? -EINVAL : 0;
netlink: pass extended ACK struct to parsing functions Pass the new extended ACK reporting struct to all of the generic netlink parsing functions. For now, pass NULL in almost all callers (except for some in the core.) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-12 20:34:07 +08:00
err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy, NULL);
[NET_SCHED]: Propagate nla_parse return value nla_parse() returns more detailed errno codes, propagate them back on error. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:33:32 +08:00
if (err < 0)
return err;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
if (tb[TCA_U32_FLAGS]) {
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
flags = nla_get_u32(tb[TCA_U32_FLAGS]);
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
if (!tc_flags_valid(flags))
net: cls_u32: fix error code for invalid flags 'err' variable is not set in this test, we would return whatever previous test set 'err' to. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-06 23:16:47 +08:00
return -EINVAL;
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
}
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
n = *arg;
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
if (n) {
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
struct tc_u_knode *new;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (TC_U32_KEY(n->handle) == 0)
return -EINVAL;
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
if (n->flags != flags)
return -EINVAL;
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
new = u32_init_knode(tp, n);
if (!new)
return -ENOMEM;
err = u32_set_parms(net, tp, base,
rtnl_dereference(n->ht_up), new, tb,
tca[TCA_RATE], ovr);
if (err) {
u32_destroy_key(tp, new, false);
return err;
}
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
err = u32_replace_hw_knode(tp, new, flags);
if (err) {
u32_destroy_key(tp, new, false);
return err;
}
net/sched: cls_u32: Reflect HW offload status U32 support for the "in hw" offloading flags. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Reviewed-by: Amir Vadai <amir@vadai.me> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-16 16:31:15 +08:00
if (!tc_in_hw(new->flags))
new->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
u32_replace_knode(tp, tp_c, new);
net_sched: avoid calling tcf_unbind_filter() in call_rcu callback This fixes the following crash: [ 63.976822] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 63.980094] CPU: 1 PID: 15 Comm: ksoftirqd/1 Not tainted 3.17.0-rc6+ #648 [ 63.980094] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 63.980094] task: ffff880117dea690 ti: ffff880117dfc000 task.ti: ffff880117dfc000 [ 63.980094] RIP: 0010:[<ffffffff817e6d07>] [<ffffffff817e6d07>] u32_destroy_key+0x27/0x6d [ 63.980094] RSP: 0018:ffff880117dffcc0 EFLAGS: 00010202 [ 63.980094] RAX: ffff880117dea690 RBX: ffff8800d02e0820 RCX: 0000000000000000 [ 63.980094] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 6b6b6b6b6b6b6b6b [ 63.980094] RBP: ffff880117dffcd0 R08: 0000000000000000 R09: 0000000000000000 [ 63.980094] R10: 00006c0900006ba8 R11: 00006ba100006b9d R12: 0000000000000001 [ 63.980094] R13: ffff8800d02e0898 R14: ffffffff817e6d4d R15: ffff880117387a30 [ 63.980094] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 63.980094] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 63.980094] CR2: 00007f07e6732fed CR3: 000000011665b000 CR4: 00000000000006e0 [ 63.980094] Stack: [ 63.980094] ffff88011a9cd300 ffffffff82051ac0 ffff880117dffce0 ffffffff817e6d68 [ 63.980094] ffff880117dffd70 ffffffff810cb4c7 ffffffff810cb3cd ffff880117dfffd8 [ 63.980094] ffff880117dea690 ffff880117dea690 ffff880117dfffd8 000000000000000a [ 63.980094] Call Trace: [ 63.980094] [<ffffffff817e6d68>] u32_delete_key_freepf_rcu+0x1b/0x1d [ 63.980094] [<ffffffff810cb4c7>] rcu_process_callbacks+0x3bb/0x691 [ 63.980094] [<ffffffff810cb3cd>] ? rcu_process_callbacks+0x2c1/0x691 [ 63.980094] [<ffffffff817e6d4d>] ? u32_destroy_key+0x6d/0x6d [ 63.980094] [<ffffffff810780a4>] __do_softirq+0x142/0x323 [ 63.980094] [<ffffffff810782a8>] run_ksoftirqd+0x23/0x53 [ 63.980094] [<ffffffff81092126>] smpboot_thread_fn+0x203/0x221 [ 63.980094] [<ffffffff81091f23>] ? smpboot_unpark_thread+0x33/0x33 [ 63.980094] [<ffffffff8108e44d>] kthread+0xc9/0xd1 [ 63.980094] [<ffffffff819e00ea>] ? do_wait_for_common+0xf8/0x125 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 [ 63.980094] [<ffffffff819e43ec>] ret_from_fork+0x7c/0xb0 [ 63.980094] [<ffffffff8108e384>] ? __kthread_parkme+0x61/0x61 tp could be freed in call_rcu callback too, the order is not guaranteed. John Fastabend says: ==================== Its worth noting why this is safe. Any running schedulers will either read the valid class field or it will be zeroed. All schedulers today when the class is 0 do a lookup using the same call used by the tcf_exts_bind(). So even if we have a running classifier hit the null class pointer it will do a lookup and get to the same result. This is particularly fragile at the moment because the only way to verify this is to audit the schedulers call sites. ==================== Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-01 07:07:24 +08:00
tcf_unbind_filter(tp, &n->res);
net: sched: cls_u32 changes to knode must appear atomic to readers Changes to the cls_u32 classifier must appear atomic to the readers. Before this patch if a change is requested for both the exts and ifindex, first the ifindex is updated then the exts with tcf_exts_change(). This opens a small window where a reader can have a exts chain with an incorrect ifindex. This violates the the RCU semantics. Here we resolve this by always passing u32_set_parms() a copy of the tc_u_knode to work on and then inserting it into the hash table after the updates have been successfully applied. Tested with the following short script: #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 handle 1: \ u32 divisor 256 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 99 \ u32 link 1: hashkey mask ffffff00 at 12 \ match ip src 192.168.8.0/2 #tc filter add dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 192.168.8.0/8 match ip tos 0x0a 1e #tc filter change dev p3p2 parent 8001:0 protocol ip prio 102 \ handle 1::10 u32 classid 1:2 ht 1: \ match ip src 1.1.0.0/8 match ip tos 0x0b 1e CC: Eric Dumazet <edumazet@google.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:34 +08:00
call_rcu(&n->rcu, u32_delete_key_rcu);
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
if (tb[TCA_U32_DIVISOR]) {
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (--divisor > 0x100)
return -EINVAL;
if (TC_U32_KEY(handle))
return -EINVAL;
if (handle == 0) {
handle = gen_new_htid(tp->data);
if (handle == 0)
return -ENOMEM;
}
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (ht == NULL)
return -ENOBUFS;
ht->tp_c = tp_c;
[NET_SCHED] cls_u32: refcounting fix for u32_delete() Deleting of nonroot hnodes mostly doesn't work in u32_delete(): refcnt == 1 is expected, but such hnodes' refcnts are initialized with 0 and charged only with "link" nodes. Now they'll start with 1 like usual. Thanks to Patrick McHardy for an improving suggestion. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-13 09:37:13 +08:00
ht->refcnt = 1;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ht->divisor = divisor;
ht->handle = handle;
ht->prio = tp->prio;
net: cls_u32: catch all hardware offload errors Errors reported by u32_replace_hw_hnode() were not propagated. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-09 03:11:03 +08:00
err = u32_replace_hw_hnode(tp, ht, flags);
if (err) {
kfree(ht);
return err;
}
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
RCU_INIT_POINTER(ht->next, tp_c->hlist);
rcu_assign_pointer(tp_c->hlist, ht);
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
*arg = ht;
net: sched: add cls_u32 offload hooks for netdevs This patch allows netdev drivers to consume cls_u32 offloads via the ndo_setup_tc ndo op. This works aligns with how network drivers have been doing qdisc offloads for mqprio. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-17 13:17:09 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
if (tb[TCA_U32_HASH]) {
[NET_SCHED]: Use typeful attribute parsing helpers Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:35:03 +08:00
htid = nla_get_u32(tb[TCA_U32_HASH]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (TC_U32_HTID(htid) == TC_U32_ROOT) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht = rtnl_dereference(tp->root);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
htid = ht->handle;
} else {
ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
if (ht == NULL)
return -EINVAL;
}
} else {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht = rtnl_dereference(tp->root);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
htid = ht->handle;
}
if (ht->divisor < TC_U32_HASH(htid))
return -EINVAL;
if (handle) {
if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
return -EINVAL;
handle = htid | TC_U32_NODE(handle);
} else
handle = gen_new_kid(ht, htid);
[NET_SCHED]: Use nla_policy for attribute validation in classifiers Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:36:12 +08:00
if (tb[TCA_U32_SEL] == NULL)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -EINVAL;
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
s = nla_data(tb[TCA_U32_SEL]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[NET]: Conversions from kmalloc+memset to k(z|c)alloc. Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-22 05:51:30 +08:00
n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (n == NULL)
return -ENOBUFS;
#ifdef CONFIG_CLS_U32_PERF
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64);
n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt));
if (!n->pf) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
kfree(n);
return -ENOBUFS;
}
#endif
memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
net: sched: cls_u32 add missing rcu_assign_pointer and annotation Add missing rcu_assign_pointer and missing annotation for ht_up in cls_u32.c Caught by kbuild bot, >> net/sched/cls_u32.c:378:36: sparse: incorrect type in initializer (different address spaces) net/sched/cls_u32.c:378:36: expected struct tc_u_hnode *ht net/sched/cls_u32.c:378:36: got struct tc_u_hnode [noderef] <asn:4>*ht_up >> net/sched/cls_u32.c:610:54: sparse: incorrect type in argument 4 (different address spaces) net/sched/cls_u32.c:610:54: expected struct tc_u_hnode *ht net/sched/cls_u32.c:610:54: got struct tc_u_hnode [noderef] <asn:4>*ht_up >> net/sched/cls_u32.c:684:18: sparse: incorrect type in assignment (different address spaces) net/sched/cls_u32.c:684:18: expected struct tc_u_hnode [noderef] <asn:4>*ht_up net/sched/cls_u32.c:684:18: got struct tc_u_hnode *[assigned] ht >> net/sched/cls_u32.c:359:18: sparse: dereference of noderef expression Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16 14:30:49 +08:00
RCU_INIT_POINTER(n->ht_up, ht);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
n->handle = handle;
[PKT_SCHED] CLS_U32: Use ffs() instead of C code on hash mask to get first set bit. Computing the rank of the first set bit in the hash mask (for using later in u32_hash_fold()) was done with plain C code. Using ffs() instead makes the code more readable and improves performance (since ffs() is better optimized in assembler). Using the conditional operator on hash mask before applying ntohl() also saves one ntohl() call if mask is 0. Signed-off-by: Radu Rendec <radu.rendec@ines.ro> Signed-off-by: Jarek Poplawski <jarkao2@o2.pl> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-11 13:54:50 +08:00
n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
n->flags = flags;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
n->tp = tp;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net_sched: properly handle failure case of tcf_exts_init() After commit 22dc13c837c3 ("net_sched: convert tcf_exts from list to pointer array") we do dynamic allocation in tcf_exts_init(), therefore we need to handle the ENOMEM case properly. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-20 03:36:54 +08:00
err = tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE);
if (err < 0)
goto errout;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_CLS_U32_MARK
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
n->pcpu_success = alloc_percpu(u32);
net: cls_u32: fix missed pcpu_success free_percpu This fixes a missed free_percpu in the unwind code path and when keys are destroyed. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:04 +08:00
if (!n->pcpu_success) {
err = -ENOMEM;
goto errout;
}
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
if (tb[TCA_U32_MARK]) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct tc_u32_mark *mark;
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
mark = nla_data(tb[TCA_U32_MARK]);
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
n->val = mark->val;
n->mask = mark->mask;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
#endif
sched, cls: check if we could overwrite actions when changing a filter When actions are attached to a filter, they are a part of the filter itself, so when changing a filter we should allow to overwrite the actions inside as well. In my specific case, when I tried to _append_ a new action to an existing filter which already has an action, I got EEXIST since kernel refused to overwrite the existing one in kernel. This patch checks if we are changing the filter checking NLM_F_CREATE flag (Sigh, filters don't use NLM_F_REPLACE...) and then passes the boolean down to actions. This fixes the problem above. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-26 04:54:06 +08:00
err = u32_set_parms(net, tp, base, ht, n, tb, tca[TCA_RATE], ovr);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (err == 0) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_knode __rcu **ins;
struct tc_u_knode *pins;
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
err = u32_replace_hw_knode(tp, n, flags);
if (err)
goto errhw;
net/sched: cls_u32: Reflect HW offload status U32 support for the "in hw" offloading flags. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Reviewed-by: Amir Vadai <amir@vadai.me> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-16 16:31:15 +08:00
if (!tc_in_hw(n->flags))
n->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ins = &ht->ht[TC_U32_HASH(handle)];
for (pins = rtnl_dereference(*ins); pins;
ins = &pins->next, pins = rtnl_dereference(*ins))
if (TC_U32_NODE(handle) < TC_U32_NODE(pins->handle))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
break;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
RCU_INIT_POINTER(n->next, pins);
rcu_assign_pointer(*ins, n);
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
*arg = n;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
net: cls_u32: fix missed pcpu_success free_percpu This fixes a missed free_percpu in the unwind code path and when keys are destroyed. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:04 +08:00
net: cls_u32: Add support for skip-sw flag to tc u32 classifier. On devices that support TC U32 offloads, this flag enables a filter to be added only to HW. skip-sw and skip-hw are mutually exclusive flags. By default without any flags, the filter is added to both HW and SW, but no error checks are done in case of failure to add to HW. With skip-sw, failure to add to HW is treated as an error. Here is a sample script that adds 2 filters, one with skip-sw and the other with skip-hw flag. # add ingress qdisc tc qdisc add dev p4p1 ingress # enable hw tc offload. ethtool -K p4p1 hw-tc-offload on # add u32 filter with skip-sw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:1 u32 ht 800: flowid 800:1 \ skip-sw \ match ip src 192.168.1.0/24 \ action drop # add u32 filter with skip-hw flag. tc filter add dev p4p1 parent ffff: protocol ip prio 99 \ handle 800:0:2 u32 ht 800: flowid 800:2 \ skip-hw \ match ip src 192.168.2.0/24 \ action drop Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-13 08:08:23 +08:00
errhw:
net: cls_u32: fix missed pcpu_success free_percpu This fixes a missed free_percpu in the unwind code path and when keys are destroyed. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-20 12:50:04 +08:00
#ifdef CONFIG_CLS_U32_MARK
free_percpu(n->pcpu_success);
#endif
net_sched: properly handle failure case of tcf_exts_init() After commit 22dc13c837c3 ("net_sched: convert tcf_exts from list to pointer array") we do dynamic allocation in tcf_exts_init(), therefore we need to handle the ENOMEM case properly. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-20 03:36:54 +08:00
errout:
tcf_exts_destroy(&n->exts);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_CLS_U32_PERF
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
free_percpu(n->pf);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
kfree(n);
return err;
}
static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
struct tc_u_common *tp_c = tp->data;
struct tc_u_hnode *ht;
struct tc_u_knode *n;
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
unsigned int h;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (arg->stop)
return;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
for (ht = rtnl_dereference(tp_c->hlist);
ht;
ht = rtnl_dereference(ht->next)) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (ht->prio != tp->prio)
continue;
if (arg->count >= arg->skip) {
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
if (arg->fn(tp, ht, arg) < 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
arg->stop = 1;
return;
}
}
arg->count++;
for (h = 0; h <= ht->divisor; h++) {
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
for (n = rtnl_dereference(ht->ht[h]);
n;
n = rtnl_dereference(n->next)) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (arg->count < arg->skip) {
arg->count++;
continue;
}
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
if (arg->fn(tp, n, arg) < 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
arg->stop = 1;
return;
}
arg->count++;
}
}
}
}
net_sched: add reverse binding for tc class TC filters when used as classifiers are bound to TC classes. However, there is a hidden difference when adding them in different orders: 1. If we add tc classes before its filters, everything is fine. Logically, the classes exist before we specify their ID's in filters, it is easy to bind them together, just as in the current code base. 2. If we add tc filters before the tc classes they bind, we have to do dynamic lookup in fast path. What's worse, this happens all the time not just once, because on fast path tcf_result is passed on stack, there is no way to propagate back to the one in tc filters. This hidden difference hurts performance silently if we have many tc classes in hierarchy. This patch intends to close this gap by doing the reverse binding when we create a new class, in this case we can actually search all the filters in its parent, match and fixup by classid. And because tcf_result is specific to each type of tc filter, we have to introduce a new ops for each filter to tell how to bind the class. Note, we still can NOT totally get rid of those class lookup in ->enqueue() because cgroup and flow filters have no way to determine the classid at setup time, they still have to go through dynamic lookup. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-31 05:30:36 +08:00
static void u32_bind_class(void *fh, u32 classid, unsigned long cl)
{
struct tc_u_knode *n = fh;
if (n && n->res.classid == classid)
n->res.class = cl;
}
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
static int u32_dump(struct net *net, struct tcf_proto *tp, void *fh,
net sched: stylistic cleanups Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-18 20:45:33 +08:00
struct sk_buff *skb, struct tcmsg *t)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
struct tc_u_knode *n = fh;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
struct tc_u_hnode *ht_up, *ht_down;
[NET_SCHED]: Use nla_nest_start/nla_nest_end Use nla_nest_start/nla_nest_end for dumping nested attributes. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:34:11 +08:00
struct nlattr *nest;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (n == NULL)
return skb->len;
t->tcm_handle = n->handle;
[NET_SCHED]: Use nla_nest_start/nla_nest_end Use nla_nest_start/nla_nest_end for dumping nested attributes. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:34:11 +08:00
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
goto nla_put_failure;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (TC_U32_KEY(n->handle) == 0) {
net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-05 12:31:43 +08:00
struct tc_u_hnode *ht = fh;
net_sched: cleanups Cleanup net/sched code to current CodingStyle and practices. Reduce inline abuse Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-20 03:26:56 +08:00
u32 divisor = ht->divisor + 1;
pkt_sched: Stop using NLA_PUT*(). These macros contain a hidden goto, and are thus extremely error prone and make code hard to audit. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-29 17:11:39 +08:00
if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor))
goto nla_put_failure;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else {
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
#ifdef CONFIG_CLS_U32_PERF
struct tc_u32_pcnt *gpf;
int cpu;
net: sched: fix unsued cpu variable kbuild test robot reported an unused variable cpu in cls_u32.c after the patch below. This happens when PERF and MARK config variables are disabled Fix this is to use separate variables for perf and mark and define the cpu variable inside the ifdef logic. Fixes: 459d5f626da7 ("net: sched: make cls_u32 per cpu")' Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16 14:30:26 +08:00
#endif
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
pkt_sched: Stop using NLA_PUT*(). These macros contain a hidden goto, and are thus extremely error prone and make code hard to audit. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-29 17:11:39 +08:00
if (nla_put(skb, TCA_U32_SEL,
sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
&n->sel))
goto nla_put_failure;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht_up = rtnl_dereference(n->ht_up);
if (ht_up) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
u32 htid = n->handle & 0xFFFFF000;
pkt_sched: Stop using NLA_PUT*(). These macros contain a hidden goto, and are thus extremely error prone and make code hard to audit. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-29 17:11:39 +08:00
if (nla_put_u32(skb, TCA_U32_HASH, htid))
goto nla_put_failure;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
pkt_sched: Stop using NLA_PUT*(). These macros contain a hidden goto, and are thus extremely error prone and make code hard to audit. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-29 17:11:39 +08:00
if (n->res.classid &&
nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid))
goto nla_put_failure;
net: sched: make cls_u32 lockless Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:09:16 +08:00
ht_down = rtnl_dereference(n->ht_down);
if (ht_down &&
nla_put_u32(skb, TCA_U32_LINK, ht_down->handle))
pkt_sched: Stop using NLA_PUT*(). These macros contain a hidden goto, and are thus extremely error prone and make code hard to audit. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-29 17:11:39 +08:00
goto nla_put_failure;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
net: sched: cls_u32 add bit to specify software only rules In the initial implementation the only way to stop a rule from being inserted into the hardware table was via the device feature flag. However this doesn't work well when working on an end host system where packets are expect to hit both the hardware and software datapaths. For example we can imagine a rule that will match an IP address and increment a field. If we install this rule in both hardware and software we may increment the field twice. To date we have only added support for the drop action so we have been able to ignore these cases. But as we extend the action support we will hit this example plus more such cases. Arguably these are not even corner cases in many working systems these cases will be common. To avoid forcing the driver to always abort (i.e. the above example) this patch adds a flag to add a rule in software only. A careful user can use this flag to build software and hardware datapaths that work together. One example we have found particularly useful is to use hardware resources to set the skb->mark on the skb when the match may be expensive to run in software but a mark lookup in a hash table is cheap. The idea here is hardware can do in one lookup what the u32 classifier may need to traverse multiple lists and hash tables to compute. The flag is only passed down on inserts. On deletion to avoid stale references in hardware we always try to remove a rule if it exists. The flags field is part of the classifier specific options. Although it is tempting to lift this into the generic structure doing this proves difficult do to how the tc netlink attributes are implemented along with how the dump/change routines are called. There is also precedence for putting seemingly generic pieces in the specific classifier options such as TCA_U32_POLICE, TCA_U32_ACT, etc. So although not ideal I've left FLAGS in the u32 options as well as it simplifies the code greatly and user space has already learned how to manage these bits ala 'tc' tool. Another thing if trying to update a rule we require the flags to be unchanged. This is to force user space, software u32 and the hardware u32 to keep in sync. Thanks to Simon Horman for catching this case. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-26 23:54:39 +08:00
if (n->flags && nla_put_u32(skb, TCA_U32_FLAGS, n->flags))
goto nla_put_failure;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_CLS_U32_MARK
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
if ((n->val || n->mask)) {
struct tc_u32_mark mark = {.val = n->val,
.mask = n->mask,
.success = 0};
net: sched: fix unsued cpu variable kbuild test robot reported an unused variable cpu in cls_u32.c after the patch below. This happens when PERF and MARK config variables are disabled Fix this is to use separate variables for perf and mark and define the cpu variable inside the ifdef logic. Fixes: 459d5f626da7 ("net: sched: make cls_u32 per cpu")' Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16 14:30:26 +08:00
int cpum;
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
net: sched: fix unsued cpu variable kbuild test robot reported an unused variable cpu in cls_u32.c after the patch below. This happens when PERF and MARK config variables are disabled Fix this is to use separate variables for perf and mark and define the cpu variable inside the ifdef logic. Fixes: 459d5f626da7 ("net: sched: make cls_u32 per cpu")' Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16 14:30:26 +08:00
for_each_possible_cpu(cpum) {
__u32 cnt = *per_cpu_ptr(n->pcpu_success, cpum);
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
mark.success += cnt;
}
if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark))
goto nla_put_failure;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
net_sched: cls: refactor out struct tcf_ext_map These information can be saved in tcf_exts, and this will simplify the code. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-16 12:15:07 +08:00
if (tcf_exts_dump(skb, &n->exts) < 0)
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
goto nla_put_failure;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_NET_CLS_IND
net_sched: optimize tcf_match_indev() tcf_match_indev() is called in fast path, it is not wise to search for a netdev by ifindex and then compare by its name, just compare the ifindex. Also, dev->name could be changed by user-space, therefore the match would be always fail, but dev->ifindex could be consistent. BTW, this will also save some bytes from the core struct of u32. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10 08:14:02 +08:00
if (n->ifindex) {
struct net_device *dev;
dev = __dev_get_by_index(net, n->ifindex);
if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name))
goto nla_put_failure;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
#ifdef CONFIG_CLS_U32_PERF
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
gpf = kzalloc(sizeof(struct tc_u32_pcnt) +
n->sel.nkeys * sizeof(u64),
GFP_KERNEL);
if (!gpf)
goto nla_put_failure;
for_each_possible_cpu(cpu) {
int i;
struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu);
gpf->rcnt += pf->rcnt;
gpf->rhit += pf->rhit;
for (i = 0; i < n->sel.nkeys; i++)
gpf->kcnts[i] += pf->kcnts[i];
}
sched: align nlattr properly when needed Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-26 16:06:18 +08:00
if (nla_put_64bit(skb, TCA_U32_PCNT,
sizeof(struct tc_u32_pcnt) +
n->sel.nkeys * sizeof(u64),
gpf, TCA_U32_PAD)) {
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
kfree(gpf);
pkt_sched: Stop using NLA_PUT*(). These macros contain a hidden goto, and are thus extremely error prone and make code hard to audit. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-29 17:11:39 +08:00
goto nla_put_failure;
net: sched: make cls_u32 per cpu This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13 11:08:47 +08:00
}
kfree(gpf);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
}
[NET_SCHED]: Use nla_nest_start/nla_nest_end Use nla_nest_start/nla_nest_end for dumping nested attributes. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:34:11 +08:00
nla_nest_end(skb, nest);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (TC_U32_KEY(n->handle))
net_sched: cls: refactor out struct tcf_ext_map These information can be saved in tcf_exts, and this will simplify the code. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-16 12:15:07 +08:00
if (tcf_exts_dump_stats(skb, &n->exts) < 0)
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
goto nla_put_failure;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return skb->len;
[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:11:33 +08:00
nla_put_failure:
[NET_SCHED]: Use nla_nest_start/nla_nest_end Use nla_nest_start/nla_nest_end for dumping nested attributes. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-24 12:34:11 +08:00
nla_nest_cancel(skb, nest);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -1;
}
[NET_SCHED]: mark classifier ops __read_mostly Additionally remove unnecessary NULL initilizations of the next pointer. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-23 14:10:42 +08:00
static struct tcf_proto_ops cls_u32_ops __read_mostly = {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
.kind = "u32",
.classify = u32_classify,
.init = u32_init,
.destroy = u32_destroy,
.get = u32_get,
.change = u32_change,
.delete = u32_delete,
.walk = u32_walk,
.dump = u32_dump,
net_sched: add reverse binding for tc class TC filters when used as classifiers are bound to TC classes. However, there is a hidden difference when adding them in different orders: 1. If we add tc classes before its filters, everything is fine. Logically, the classes exist before we specify their ID's in filters, it is easy to bind them together, just as in the current code base. 2. If we add tc filters before the tc classes they bind, we have to do dynamic lookup in fast path. What's worse, this happens all the time not just once, because on fast path tcf_result is passed on stack, there is no way to propagate back to the one in tc filters. This hidden difference hurts performance silently if we have many tc classes in hierarchy. This patch intends to close this gap by doing the reverse binding when we create a new class, in this case we can actually search all the filters in its parent, match and fixup by classid. And because tcf_result is specific to each type of tc filter, we have to introduce a new ops for each filter to tell how to bind the class. Note, we still can NOT totally get rid of those class lookup in ->enqueue() because cgroup and flow filters have no way to determine the classid at setup time, they still have to go through dynamic lookup. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-31 05:30:36 +08:00
.bind_class = u32_bind_class,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
.owner = THIS_MODULE,
};
static int __init init_u32(void)
{
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
int i, ret;
net sched: printk message severity The previous patch encourage me to go look at all the messages in the network scheduler and fix them. Many messages were missing any severity level. Some serious ones that should never happen were turned into WARN(), and the random noise messages that were handled changed to pr_debug(). Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-12 14:37:05 +08:00
pr_info("u32 classifier\n");
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_CLS_U32_PERF
net sched: printk message severity The previous patch encourage me to go look at all the messages in the network scheduler and fix them. Many messages were missing any severity level. Some serious ones that should never happen were turned into WARN(), and the random noise messages that were handled changed to pr_debug(). Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-12 14:37:05 +08:00
pr_info(" Performance counters on\n");
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
#ifdef CONFIG_NET_CLS_IND
net sched: printk message severity The previous patch encourage me to go look at all the messages in the network scheduler and fix them. Many messages were missing any severity level. Some serious ones that should never happen were turned into WARN(), and the random noise messages that were handled changed to pr_debug(). Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-12 14:37:05 +08:00
pr_info(" input device check on\n");
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
#ifdef CONFIG_NET_CLS_ACT
net sched: printk message severity The previous patch encourage me to go look at all the messages in the network scheduler and fix them. Many messages were missing any severity level. Some serious ones that should never happen were turned into WARN(), and the random noise messages that were handled changed to pr_debug(). Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-12 14:37:05 +08:00
pr_info(" Actions configured\n");
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
tc_u_common_hash = kvmalloc_array(U32_HASH_SIZE,
sizeof(struct hlist_head),
GFP_KERNEL);
if (!tc_u_common_hash)
return -ENOMEM;
for (i = 0; i < U32_HASH_SIZE; i++)
INIT_HLIST_HEAD(&tc_u_common_hash[i]);
ret = register_tcf_proto_ops(&cls_u32_ops);
if (ret)
kvfree(tc_u_common_hash);
return ret;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
[NET] SCHED: Fix whitespace errors. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-09 22:25:16 +08:00
static void __exit exit_u32(void)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unregister_tcf_proto_ops(&cls_u32_ops);
net_sched: kill u32_node pointer in Qdisc It is ugly to hide a u32-filter-specific pointer inside Qdisc, this breaks the TC layers: 1. Qdisc is a generic representation, should not have any specific data of any type 2. Qdisc layer is above filter layer, should only save filters in the list of struct tcf_proto. This pointer is used as the head of the chain of u32 hash tables, that is struct tc_u_hnode, because u32 filter is very special, it allows to create multiple hash tables within one qdisc and across multiple u32 filters. Instead of using this ugly pointer, we can just save it in a global hash table key'ed by (dev ifindex, qdisc handle), therefore we can still treat it as a per qdisc basis data structure conceptually. Of course, because of network namespaces, this key is not unique at all, but it is fine as we already have a pointer to Qdisc in struct tc_u_common, we can just compare the pointers when collision. And this only affects slow paths, has no impact to fast path, thanks to the pointer ->tp_c. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 07:51:30 +08:00
kvfree(tc_u_common_hash);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
module_init(init_u32)
module_exit(exit_u32)
MODULE_LICENSE("GPL");
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