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linux-next/net/tipc/bcast.h

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[TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-03 02:04:38 +08:00
/*
* net/tipc/bcast.h: Include file for TIPC broadcast code
[NET] TIPC: Fix whitespace errors. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-09 22:25:21 +08:00
*
tipc: simplify socket multicast reception The structure 'tipc_port_list' is used to collect port numbers representing multicast destination socket on a receiving node. The list is not based on a standard linked list, and is in reality optimized for the uncommon case that there are more than one multicast destinations per node. This makes the list handling unecessarily complex, and as a consequence, even the socket multicast reception becomes more complex. In this commit, we replace 'tipc_port_list' with a new 'struct tipc_plist', which is based on a standard list. We give the new list stack (push/pop) semantics, someting that simplifies the implementation of the function tipc_sk_mcast_rcv(). Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-05 21:36:43 +08:00
* Copyright (c) 2003-2006, 2014-2015, Ericsson AB
tipc: Clean up tracking of node requesting a broadcast retransmit Allows the broadcast link to track the node that is requesting a retransmit in a new field dedicated to that purpose. This replaces the existing mechanism that (ab)uses an existing node structure linked list field to do the tracking. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-01-19 02:53:16 +08:00
* Copyright (c) 2005, 2010-2011, Wind River Systems
[TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-03 02:04:38 +08:00
* All rights reserved.
*
[TIPC] License header update The license header in each file now more clearly state that this code is licensed under a dual BSD/GPL. Before this was only evident if you looked at the MODULE_LICENSE line in core.c. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-11 20:30:43 +08:00
* Redistribution and use in source and binary forms, with or without
[TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-03 02:04:38 +08:00
* modification, are permitted provided that the following conditions are met:
*
[TIPC] License header update The license header in each file now more clearly state that this code is licensed under a dual BSD/GPL. Before this was only evident if you looked at the MODULE_LICENSE line in core.c. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-11 20:30:43 +08:00
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
[TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-03 02:04:38 +08:00
*
[TIPC] License header update The license header in each file now more clearly state that this code is licensed under a dual BSD/GPL. Before this was only evident if you looked at the MODULE_LICENSE line in core.c. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-11 20:30:43 +08:00
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
[TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-03 02:04:38 +08:00
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _TIPC_BCAST_H
#define _TIPC_BCAST_H
tipc: move bcast definitions to bcast.c Currently, a number of structure and function definitions related to the broadcast functionality are unnecessarily exposed in the file bcast.h. This obscures the fact that the external interface towards the broadcast link in fact is very narrow, and causes unnecessary recompilations of other files when anything changes in those definitions. In this commit, we move as many of those definitions as is currently possible to the file bcast.c. We also rename the structure 'tipc_bclink' to 'tipc_bc_base', both since the name does not correctly describe the contents of this struct, and will do so even less in the future, and because we want to use the term 'link' more appropriately in the functionality introduced later in this series. Finally, we rename a couple of functions, such as tipc_bclink_xmit() and others that will be kept in the future, to include the term 'bcast' instead. There are no functional changes in this commit. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:33 +08:00
#include "core.h"
tipc: make tipc broadcast link support net namespace TIPC broadcast link is statically established and its relevant states are maintained with the global variables: "bcbearer", "bclink" and "bcl". Allowing different namespace to own different broadcast link instances, these variables must be moved to tipc_net structure and broadcast link instances would be allocated and initialized when namespace is created. Signed-off-by: Ying Xue <ying.xue@windriver.com> Tested-by: Tero Aho <Tero.Aho@coriant.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-09 15:27:07 +08:00
struct tipc_node;
tipc: move bcast definitions to bcast.c Currently, a number of structure and function definitions related to the broadcast functionality are unnecessarily exposed in the file bcast.h. This obscures the fact that the external interface towards the broadcast link in fact is very narrow, and causes unnecessary recompilations of other files when anything changes in those definitions. In this commit, we move as many of those definitions as is currently possible to the file bcast.c. We also rename the structure 'tipc_bclink' to 'tipc_bc_base', both since the name does not correctly describe the contents of this struct, and will do so even less in the future, and because we want to use the term 'link' more appropriately in the functionality introduced later in this series. Finally, we rename a couple of functions, such as tipc_bclink_xmit() and others that will be kept in the future, to include the term 'bcast' instead. There are no functional changes in this commit. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:33 +08:00
struct tipc_msg;
struct tipc_nl_msg;
tipc: add functionality to lookup multicast destination nodes As a further preparation for the upcoming 'replicast' functionality, we add some necessary structs and functions for looking up and returning a list of all nodes that host destinations for a given multicast message. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-19 02:50:51 +08:00
struct tipc_nlist;
struct tipc_nitem;
tipc: narrow down exposure of struct tipc_node In our effort to have less code and include dependencies between entities such as node, link and bearer, we try to narrow down the exposed interface towards the node as much as possible. In this commit, we move the definition of struct tipc_node, along with many of its associated function declarations, from node.h to node.c. We also move some function definitions from link.c and name_distr.c to node.c, since they access fields in struct tipc_node that should not be externally visible. The moved functions are renamed according to new location, and made static whenever possible. There are no functional changes in this commit. Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20 03:30:45 +08:00
extern const char tipc_bclink_name[];
[TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-03 02:04:38 +08:00
tipc: make replicast a user selectable option If the bearer carrying multicast messages supports broadcast, those messages will be sent to all cluster nodes, irrespective of whether these nodes host any actual destinations socket or not. This is clearly wasteful if the cluster is large and there are only a few real destinations for the message being sent. In this commit we extend the eligibility of the newly introduced "replicast" transmit option. We now make it possible for a user to select which method he wants to be used, either as a mandatory setting via setsockopt(), or as a relative setting where we let the broadcast layer decide which method to use based on the ratio between cluster size and the message's actual number of destination nodes. In the latter case, a sending socket must stick to a previously selected method until it enters an idle period of at least 5 seconds. This eliminates the risk of message reordering caused by method change, i.e., when changes to cluster size or number of destinations would otherwise mandate a new method to be used. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-19 02:50:53 +08:00
#define TIPC_METHOD_EXPIRE msecs_to_jiffies(5000)
tipc: add functionality to lookup multicast destination nodes As a further preparation for the upcoming 'replicast' functionality, we add some necessary structs and functions for looking up and returning a list of all nodes that host destinations for a given multicast message. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-19 02:50:51 +08:00
struct tipc_nlist {
struct list_head list;
u32 self;
u16 remote;
bool local;
};
void tipc_nlist_init(struct tipc_nlist *nl, u32 self);
void tipc_nlist_purge(struct tipc_nlist *nl);
void tipc_nlist_add(struct tipc_nlist *nl, u32 node);
void tipc_nlist_del(struct tipc_nlist *nl, u32 node);
tipc: make replicast a user selectable option If the bearer carrying multicast messages supports broadcast, those messages will be sent to all cluster nodes, irrespective of whether these nodes host any actual destinations socket or not. This is clearly wasteful if the cluster is large and there are only a few real destinations for the message being sent. In this commit we extend the eligibility of the newly introduced "replicast" transmit option. We now make it possible for a user to select which method he wants to be used, either as a mandatory setting via setsockopt(), or as a relative setting where we let the broadcast layer decide which method to use based on the ratio between cluster size and the message's actual number of destination nodes. In the latter case, a sending socket must stick to a previously selected method until it enters an idle period of at least 5 seconds. This eliminates the risk of message reordering caused by method change, i.e., when changes to cluster size or number of destinations would otherwise mandate a new method to be used. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-19 02:50:53 +08:00
/* Cookie to be used between socket and broadcast layer
* @rcast: replicast (instead of broadcast) was used at previous xmit
* @mandatory: broadcast/replicast indication was set by user
* @expires: re-evaluate non-mandatory transmit method if we are past this
*/
struct tipc_mc_method {
bool rcast;
bool mandatory;
unsigned long expires;
};
tipc: move bcast definitions to bcast.c Currently, a number of structure and function definitions related to the broadcast functionality are unnecessarily exposed in the file bcast.h. This obscures the fact that the external interface towards the broadcast link in fact is very narrow, and causes unnecessary recompilations of other files when anything changes in those definitions. In this commit, we move as many of those definitions as is currently possible to the file bcast.c. We also rename the structure 'tipc_bclink' to 'tipc_bc_base', both since the name does not correctly describe the contents of this struct, and will do so even less in the future, and because we want to use the term 'link' more appropriately in the functionality introduced later in this series. Finally, we rename a couple of functions, such as tipc_bclink_xmit() and others that will be kept in the future, to include the term 'bcast' instead. There are no functional changes in this commit. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:33 +08:00
int tipc_bcast_init(struct net *net);
void tipc_bcast_stop(struct net *net);
tipc: simplify bearer level broadcast Until now, we have been keeping track of the exact set of broadcast destinations though the help structure tipc_node_map. This leads us to have to maintain a whole infrastructure for supporting this, including a pseudo-bearer and a number of functions to manipulate both the bearers and the node map correctly. Apart from the complexity, this approach is also limiting, as struct tipc_node_map only can support cluster local broadcast if we want to avoid it becoming excessively large. We want to eliminate this limitation, in order to enable introduction of scoped multicast in the future. A closer analysis reveals that it is unnecessary maintaining this "full set" overview; it is sufficient to keep a counter per bearer, indicating how many nodes can be reached via this bearer at the moment. The protocol is now robust enough to handle transitional discrepancies between the nominal number of reachable destinations, as expected by the broadcast protocol itself, and the number which is actually reachable at the moment. The initial broadcast synchronization, in conjunction with the retransmission mechanism, ensures that all packets will eventually be acknowledged by the correct set of destinations. This commit introduces these changes. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:42 +08:00
void tipc_bcast_add_peer(struct net *net, struct tipc_link *l,
tipc: let broadcast packet reception use new link receive function The code path for receiving broadcast packets is currently distinct from the unicast path. This leads to unnecessary code and data duplication, something that can be avoided with some effort. We now introduce separate per-peer tipc_link instances for handling broadcast packet reception. Each receive link keeps a pointer to the common, single, broadcast link instance, and can hence handle release and retransmission of send buffers as if they belonged to the own instance. Furthermore, we let each unicast link instance keep a reference to both the pertaining broadcast receive link, and to the common send link. This makes it possible for the unicast links to easily access data for broadcast link synchronization, as well as for carrying acknowledges for received broadcast packets. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:41 +08:00
struct sk_buff_head *xmitq);
tipc: simplify bearer level broadcast Until now, we have been keeping track of the exact set of broadcast destinations though the help structure tipc_node_map. This leads us to have to maintain a whole infrastructure for supporting this, including a pseudo-bearer and a number of functions to manipulate both the bearers and the node map correctly. Apart from the complexity, this approach is also limiting, as struct tipc_node_map only can support cluster local broadcast if we want to avoid it becoming excessively large. We want to eliminate this limitation, in order to enable introduction of scoped multicast in the future. A closer analysis reveals that it is unnecessary maintaining this "full set" overview; it is sufficient to keep a counter per bearer, indicating how many nodes can be reached via this bearer at the moment. The protocol is now robust enough to handle transitional discrepancies between the nominal number of reachable destinations, as expected by the broadcast protocol itself, and the number which is actually reachable at the moment. The initial broadcast synchronization, in conjunction with the retransmission mechanism, ensures that all packets will eventually be acknowledged by the correct set of destinations. This commit introduces these changes. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:42 +08:00
void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_bcl);
void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id);
void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id);
tipc: introduce jumbo frame support for broadcast Until now, we have only been supporting a fix MTU size of 1500 bytes for all broadcast media, irrespective of their actual capability. We now make the broadcast MTU adaptable to the carrying media, i.e., we use the smallest MTU supported by any of the interfaces attached to TIPC. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:43 +08:00
int tipc_bcast_get_mtu(struct net *net);
tipc: make replicast a user selectable option If the bearer carrying multicast messages supports broadcast, those messages will be sent to all cluster nodes, irrespective of whether these nodes host any actual destinations socket or not. This is clearly wasteful if the cluster is large and there are only a few real destinations for the message being sent. In this commit we extend the eligibility of the newly introduced "replicast" transmit option. We now make it possible for a user to select which method he wants to be used, either as a mandatory setting via setsockopt(), or as a relative setting where we let the broadcast layer decide which method to use based on the ratio between cluster size and the message's actual number of destination nodes. In the latter case, a sending socket must stick to a previously selected method until it enters an idle period of at least 5 seconds. This eliminates the risk of message reordering caused by method change, i.e., when changes to cluster size or number of destinations would otherwise mandate a new method to be used. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-19 02:50:53 +08:00
void tipc_bcast_disable_rcast(struct net *net);
tipc: introduce replicast as transport option for multicast TIPC multicast messages are currently carried over a reliable 'broadcast link', making use of the underlying media's ability to transport packets as L2 broadcast or IP multicast to all nodes in the cluster. When the used bearer is lacking that ability, we can instead emulate the broadcast service by replicating and sending the packets over as many unicast links as needed to reach all identified destinations. We now introduce a new TIPC link-level 'replicast' service that does this. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-19 02:50:52 +08:00
int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts,
tipc: make replicast a user selectable option If the bearer carrying multicast messages supports broadcast, those messages will be sent to all cluster nodes, irrespective of whether these nodes host any actual destinations socket or not. This is clearly wasteful if the cluster is large and there are only a few real destinations for the message being sent. In this commit we extend the eligibility of the newly introduced "replicast" transmit option. We now make it possible for a user to select which method he wants to be used, either as a mandatory setting via setsockopt(), or as a relative setting where we let the broadcast layer decide which method to use based on the ratio between cluster size and the message's actual number of destination nodes. In the latter case, a sending socket must stick to a previously selected method until it enters an idle period of at least 5 seconds. This eliminates the risk of message reordering caused by method change, i.e., when changes to cluster size or number of destinations would otherwise mandate a new method to be used. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-19 02:50:53 +08:00
struct tipc_mc_method *method, struct tipc_nlist *dests,
u16 *cong_link_cnt);
tipc: let broadcast packet reception use new link receive function The code path for receiving broadcast packets is currently distinct from the unicast path. This leads to unnecessary code and data duplication, something that can be avoided with some effort. We now introduce separate per-peer tipc_link instances for handling broadcast packet reception. Each receive link keeps a pointer to the common, single, broadcast link instance, and can hence handle release and retransmission of send buffers as if they belonged to the own instance. Furthermore, we let each unicast link instance keep a reference to both the pertaining broadcast receive link, and to the common send link. This makes it possible for the unicast links to easily access data for broadcast link synchronization, as well as for carrying acknowledges for received broadcast packets. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:41 +08:00
int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb);
tipc: fix broadcast link synchronization problem In commit 2d18ac4ba745 ("tipc: extend broadcast link initialization criteria") we tried to fix a problem with the initial synchronization of broadcast link acknowledge values. Unfortunately that solution is not sufficient to solve the issue. We have seen it happen that LINK_PROTOCOL/STATE packets with a valid non-zero unicast acknowledge number may bypass BCAST_PROTOCOL initialization, NAME_DISTRIBUTOR and other STATE packets with invalid broadcast acknowledge numbers, leading to premature opening of the broadcast link. When the bypassed packets finally arrive, they are inadvertently accepted, and the already correctly initialized acknowledge number in the broadcast receive link is overwritten by the invalid (zero) value of the said packets. After this the broadcast link goes stale. We now fix this by marking the packets where we know the acknowledge value is or may be invalid, and then ignoring the acks from those. To this purpose, we claim an unused bit in the header to indicate that the value is invalid. We set the bit to 1 in the initial BCAST_PROTOCOL synchronization packet and all initial ("bulk") NAME_DISTRIBUTOR packets, plus those LINK_PROTOCOL packets sent out before the broadcast links are fully synchronized. This minor protocol update is fully backwards compatible. Reported-by: John Thompson <thompa.atl@gmail.com> Tested-by: John Thompson <thompa.atl@gmail.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-28 06:51:55 +08:00
void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l,
struct tipc_msg *hdr);
tipc: transfer broadcast nacks in link state messages When we send broadcasts in clusters of more 70-80 nodes, we sometimes see the broadcast link resetting because of an excessive number of retransmissions. This is caused by a combination of two factors: 1) A 'NACK crunch", where loss of broadcast packets is discovered and NACK'ed by several nodes simultaneously, leading to multiple redundant broadcast retransmissions. 2) The fact that the NACKS as such also are sent as broadcast, leading to excessive load and packet loss on the transmitting switch/bridge. This commit deals with the latter problem, by moving sending of broadcast nacks from the dedicated BCAST_PROTOCOL/NACK message type to regular unicast LINK_PROTOCOL/STATE messages. We allocate 10 unused bits in word 8 of the said message for this purpose, and introduce a new capability bit, TIPC_BCAST_STATE_NACK in order to keep the change backwards compatible. Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-02 01:52:49 +08:00
int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,
struct tipc_msg *hdr);
tipc: make tipc broadcast link support net namespace TIPC broadcast link is statically established and its relevant states are maintained with the global variables: "bcbearer", "bclink" and "bcl". Allowing different namespace to own different broadcast link instances, these variables must be moved to tipc_net structure and broadcast link instances would be allocated and initialized when namespace is created. Signed-off-by: Ying Xue <ying.xue@windriver.com> Tested-by: Tero Aho <Tero.Aho@coriant.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-09 15:27:07 +08:00
int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg);
tipc: add broadcast link window set/get to nl api Add the ability to get or set the broadcast link window through the new netlink API. The functionality was unintentionally missing from the new netlink API. Adding this means that we also fix the breakage in the old API when coming through the compat layer. Fixes: 37e2d4843f9e (tipc: convert legacy nl link prop set to nl compat) Reported-by: Tomi Ollila <tomi.ollila@iki.fi> Signed-off-by: Richard Alpe <richard.alpe@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-06 19:58:55 +08:00
int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]);
tipc: clean up unused code and structures After the previous changes in this series, we can now remove some unused code and structures, both in the broadcast, link aggregation and link code. There are no functional changes in this commit. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:48 +08:00
int tipc_bclink_reset_stats(struct net *net);
tipc: add link get/dump to new netlink api Add TIPC_NL_LINK_GET command to the new tipc netlink API. This command supports dumping all information about all links (including the broadcast link) or getting all information about a specific link (not the broadcast link). The information about a link includes name, transmission info, properties and link statistics. As the tipc broadcast link is special we unfortunately have to treat it specially. It is a deliberate decision not to abstract the broadcast link on this (API) level. Netlink logical layout of link response message: -> port -> name -> MTU -> RX -> TX -> up flag -> active flag -> properties -> priority -> tolerance -> window -> statistics -> rx_info -> rx_fragments -> rx_fragmented -> rx_bundles -> rx_bundled -> tx_info -> tx_fragments -> tx_fragmented -> tx_bundles -> tx_bundled -> msg_prof_tot -> msg_len_cnt -> msg_len_tot -> msg_len_p0 -> msg_len_p1 -> msg_len_p2 -> msg_len_p3 -> msg_len_p4 -> msg_len_p5 -> msg_len_p6 -> rx_states -> rx_probes -> rx_nacks -> rx_deferred -> tx_states -> tx_probes -> tx_nacks -> tx_acks -> retransmitted -> duplicates -> link_congs -> max_queue -> avg_queue Signed-off-by: Richard Alpe <richard.alpe@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-20 17:29:12 +08:00
tipc: move broadcast link lock to struct tipc_net The broadcast lock will need to be acquired outside bcast.c in a later commit. For this reason, we move the lock to struct tipc_net. Consistent with the changes in the previous commit, we also introducee two new functions tipc_bcast_lock() and tipc_bcast_unlock(). The code that is currently using tipc_bclink_lock()/unlock() will be phased out during the coming commits in this series. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:34 +08:00
static inline void tipc_bcast_lock(struct net *net)
{
spin_lock_bh(&tipc_net(net)->bclock);
}
static inline void tipc_bcast_unlock(struct net *net)
{
spin_unlock_bh(&tipc_net(net)->bclock);
}
tipc: let broadcast packet reception use new link receive function The code path for receiving broadcast packets is currently distinct from the unicast path. This leads to unnecessary code and data duplication, something that can be avoided with some effort. We now introduce separate per-peer tipc_link instances for handling broadcast packet reception. Each receive link keeps a pointer to the common, single, broadcast link instance, and can hence handle release and retransmission of send buffers as if they belonged to the own instance. Furthermore, we let each unicast link instance keep a reference to both the pertaining broadcast receive link, and to the common send link. This makes it possible for the unicast links to easily access data for broadcast link synchronization, as well as for carrying acknowledges for received broadcast packets. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 20:51:41 +08:00
static inline struct tipc_link *tipc_bc_sndlink(struct net *net)
{
return tipc_net(net)->bcl;
}
[TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-03 02:04:38 +08:00
#endif
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