It is not safe to have the string table for statistics change order or
size over the lifetime of a given netdevice. This is because of the
nature of the 3-step process for obtaining stats. First, user space
performs a request for the size of the strings table. Second it performs
a separate request for the strings themselves, after allocating space
for the table. Third, it requests the stats themselves, also allocating
space for the table.
If the size decreased, there is potential to see garbage data or stats
values. In the worst case, we could potentially see stats values become
mis-aligned with their strings, so that it looks like a statistic is
being reported differently than it actually is.
Even worse, if the size increased, there is potential that the strings
table or stats table was not allocated large enough and the stats code
could access and write to memory it should not, potentially resulting in
undefined behavior and system crashes.
It isn't even safe if the size always changes under the RTNL lock. This
is because the calls take place over multiple user space commands, so it
is not possible to hold the RTNL lock for the entire duration of
obtaining strings and stats. Further, not all consumers of the ethtool
API are the user space ethtool program, and it is possible that one
assumes the strings will not change (valid under the current contract),
and thus only requests the stats values when requesting stats in a loop.
Finally, it's not possible in the general case to detect when the size
changes, because it is quite possible that one value which could impact
the stat size increased, while another decreased. This would result in
the same total number of stats, but reordering them so that stats no
longer line up with the strings they belong to. Since only size changes
aren't enough, we would need some sort of hash or token to determine
when the strings no longer match. This would require extending the
ethtool stats commands, but there is no more space in the relevant
structures.
The real solution to resolve this would be to add a completely new API
for stats, probably over netlink.
In the ice driver, the only thing impacting the stats that is not
constant is the number of queues. Instead of reporting stats for each
used queue, report stats for each allocated queue. We do not change the
number of queues allocated for a given netdevice, as we pass this into
the alloc_etherdev_mq() function to set the num_tx_queues and
num_rx_queues.
This resolves the potential bugs at the slight cost of displaying many
queue statistics which will not be activated.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Use define for the unit size shift of the Rx LAN context descriptor base
address instead of the magic number 7.
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
All BPF hash and LRU maps currently have a known and global seed
we feed into jhash() which is 0. This is suboptimal, thus fix it
by generating a random seed upon hashtab setup time which we can
later on feed into jhash() on lookup, update and deletions.
Fixes: 0f8e4bd8a1 ("bpf: add hashtable type of eBPF maps")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Eduardo Valentin <eduval@amazon.com>
There is already a check for owner == ICE_SCHED_NODE_OWNER_LAN at the
beginning of ice_sched_update_vsi_child_nodes. Remove the additional
check to address the static analysis tool smatch issue "warn: we tested
'owner' before and it was 'false'".
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This patch fixes the following smatch errors:
1) Fix "odd binop '0x0 & 0xc'" when performing the bitwise-and with a
constant value of zero (ICE_AQC_GSET_RSS_LUT_TABLE_SIZE_128_FLAG).
Remove a similar bitwise-and with 0 in ice_add_marker_act() and use the
right mask ICE_LG_ACT_GENERIC_OFFSET_M in the expression.
2) Fix a similar issue "odd binop '0x0 & 0x1800' in ice_req_irq_msix_misc.
3) Fix "odd binop '0x380000 & 0x7fff8'" in ice_add_marker_act(). Also, use
a new define ICE_LG_ACT_GENERIC_OFF_RX_DESC_PROF_IDX instead of magic
number '7'.
4) Fix warn: odd binop '0x0 & 0x18' in ice_set_dflt_vsi_ctx() by removing
unnecessary logic to explicitly unset bits 3 and 4 in port_vlan_bits.
These bits are unset already by the memset on ctxt->info.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
A previous commit removed the ability to have per-rq flags. We used
those flags to maintain inflight counts. Since we don't have those
anymore, we have to always maintain inflight counts, even if wbt is
disabled. This is clearly suboptimal.
Add a queue quiesce around changing the wbt latency settings from sysfs
to work around this. With that, we can reliably put the enabled check in
our bio_to_wbt_flags(), since we know the WBT_TRACKED flag will be
consistent for the lifetime of the request.
Fixes: c1c80384c8 ("block: remove external dependency on wbt_flags")
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The commit e7e8184747 ("powerpc/64s: move machine check SLB flushing
to mm/slb.c") introduced a bug in reloading bolted SLB entries. Unused
bolted entries are stored with .esid=0 in the slb_shadow area, and
that value is now used directly as the RB input to slbmte, which means
the RB[52:63] index field is set to 0, which causes SLB entry 0 to be
cleared.
Fix this by storing the index bits in the unused bolted entries, which
directs the slbmte to the right place.
The SLB shadow area is also used by the hypervisor, but PAPR is okay
with that, from LoPAPR v1.1, 14.11.1.3 SLB Shadow Buffer:
Note: SLB is filled sequentially starting at index 0
from the shadow buffer ignoring the contents of
RB field bits 52-63
Fixes: e7e8184747 ("powerpc/64s: move machine check SLB flushing to mm/slb.c")
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Commit 76fa4975f3 ("KVM: PPC: Check if IOMMU page is contained in
the pinned physical page", 2018-07-17) added some checks to ensure
that guest DMA mappings don't attempt to map more than the guest is
entitled to access. However, errors in the logic mean that legitimate
guest requests to map pages for DMA are being denied in some
situations. Specifically, if the first page of the range passed to
mm_iommu_get() is mapped with a normal page, and subsequent pages are
mapped with transparent huge pages, we end up with mem->pageshift ==
0. That means that the page size checks in mm_iommu_ua_to_hpa() and
mm_iommu_up_to_hpa_rm() will always fail for every page in that
region, and thus the guest can never map any memory in that region for
DMA, typically leading to a flood of error messages like this:
qemu-system-ppc64: VFIO_MAP_DMA: -22
qemu-system-ppc64: vfio_dma_map(0x10005f47780, 0x800000000000000, 0x10000, 0x7fff63ff0000) = -22 (Invalid argument)
The logic errors in mm_iommu_get() are:
(a) use of 'ua' not 'ua + (i << PAGE_SHIFT)' in the find_linux_pte()
call (meaning that find_linux_pte() returns the pte for the
first address in the range, not the address we are currently up
to);
(b) use of 'pageshift' as the variable to receive the hugepage shift
returned by find_linux_pte() - for a normal page this gets set
to 0, leading to us setting mem->pageshift to 0 when we conclude
that the pte returned by find_linux_pte() didn't match the page
we were looking at;
(c) comparing 'compshift', which is a page order, i.e. log base 2 of
the number of pages, with 'pageshift', which is a log base 2 of
the number of bytes.
To fix these problems, this patch introduces 'cur_ua' to hold the
current user address and uses that in the find_linux_pte() call;
introduces 'pteshift' to hold the hugepage shift found by
find_linux_pte(); and compares 'pteshift' with 'compshift +
PAGE_SHIFT' rather than 'compshift'.
The patch also moves the local_irq_restore to the point after the PTE
pointer returned by find_linux_pte() has been dereferenced because
otherwise the PTE could change underneath us, and adds a check to
avoid doing the find_linux_pte() call once mem->pageshift has been
reduced to PAGE_SHIFT, as an optimization.
Fixes: 76fa4975f3 ("KVM: PPC: Check if IOMMU page is contained in the pinned physical page")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The Nest MMU workaround is only needed for RW upgrades. Avoid doing
that for other PTE updates.
We also avoid clearing the PTE while marking it invalid. This is
because other page table walkers will find this PTE none and can
result in unexpected behaviour due to that. Instead we clear
_PAGE_PRESENT and set the software PTE bit _PAGE_INVALID.
pte_present() is already updated to check for both bits. This makes
sure page table walkers will find the PTE present and things like
pte_pfn(pte) returns the right value.
Based on an original patch from Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
LLVM/clang/eBPF: (Arnaldo Carvalho de Melo)
- Allow passing options to llc in addition to to clang.
Hardware tracing: (Jack Henschel)
- Improve error message for PMU address filters, clarifying availability of
that feature in hardware having hardware tracing such as Intel PT.
Python interface: (Jiri Olsa)
- Fix read_on_cpu() interface.
ELF/DWARF libraries: (Jiri Olsa)
- Fix handling of the combo compressed module file + decompressed associated
debuginfo file.
Build (Rasmus Villemoes)
- Disable parallelism for 'make clean', avoiding multiple submakes deleting
the same files and causing the build to fail on systems such as Yocto.
Kernel ABI copies: (Arnaldo Carvalho de Melo)
- Update tools's copy of x86's cpufeatures.h.
- Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'.
Miscellaneous: (Steven Rostedt)
- Change libtraceevent to SPDX License format.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-4.19-20180820' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
LLVM/clang/eBPF: (Arnaldo Carvalho de Melo)
- Allow passing options to llc in addition to to clang.
Hardware tracing: (Jack Henschel)
- Improve error message for PMU address filters, clarifying availability of
that feature in hardware having hardware tracing such as Intel PT.
Python interface: (Jiri Olsa)
- Fix read_on_cpu() interface.
ELF/DWARF libraries: (Jiri Olsa)
- Fix handling of the combo compressed module file + decompressed associated
debuginfo file.
Build (Rasmus Villemoes)
- Disable parallelism for 'make clean', avoiding multiple submakes deleting
the same files and causing the build to fail on systems such as Yocto.
Kernel ABI copies: (Arnaldo Carvalho de Melo)
- Update tools's copy of x86's cpufeatures.h.
- Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'.
Miscellaneous: (Steven Rostedt)
- Change libtraceevent to SPDX License format.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
My fix for a recursive Kconfig dependency caused another issue where the
ACPI specific options end up in the top-level menu in 'menuconfig'. This
was an unintended side-effect of having a silent option between
'menuconfig ACPI' and 'if ACPI'.
Moving the ARCH_SUPPORTS_ACPI symbol ahead of the ACPI menu solves that
problem and restores the previous presentation.
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Fixes: 2c870e6113 (arm64: fix ACPI dependencies)
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Johan Hedberg says:
====================
pull request: bluetooth 2018-08-23
Here are two important Bluetooth fixes for the MediaTek and RealTek HCI
drivers.
Please let me know if there are any issues pulling, thanks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Huazhong Tan says:
====================
net: hns3: bug fix & optimization for HNS3 driver
This patchset presents a bug fix found out when CONFIG_ARM64_64K_PAGES
enable and an optimization for HNS3 driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
'truesize' is supposed to be u32, not int, so fix it.
Signed-off-by: Huazhong tan <tanhuazhong@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When enable the config item "CONFIG_ARM64_64K_PAGES", the size of
PAGE_SIZE is 65536(64K). But the type of page_offset is u16, it will
overflow. So change it to u32, when "CONFIG_ARM64_64K_PAGES" enabled.
Fixes: 76ad4f0ee7 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 6edb3c96a5 ("net/ipv6: Defer initialization of dst to data path")
forgot to handle anycast route and init anycast rt->dst.input to ip6_forward.
Fix it by setting anycast rt->dst.input back to ip6_input.
Fixes: 6edb3c96a5 ("net/ipv6: Defer initialization of dst to data path")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Huazhong Tan says:
====================
net: hns: bug fixes & optimization for HNS driver
This patchset presents some bug fixes found out when CONFIG_ARM64_64K_PAGES
enable and an optimization for HNS driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Update hns to drop the hns_nic_get_headlen function in favour of
eth_get_headlen, and hence also removes now redundant hns_nic_get_headlen.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
skb->truesize is not meant to be tracking amount of used bytes in a skb,
but amount of reserved/consumed bytes in memory.
For instance, if we use a single byte in last page fragment, we have to
account the full size of the fragment.
So skb_add_rx_frag needs to calculate the length of the entire buffer into
turesize.
Fixes: 9cbe9fd521 ("net: hns: optimize XGE capability by reducing cpu usage")
Signed-off-by: Huazhong tan <tanhuazhong@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
'truesize' is supposed to be u32, not int, so fix it.
Signed-off-by: Huazhong tan <tanhuazhong@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When enable the config item "CONFIG_ARM64_64K_PAGES", the size of PAGE_SIZE
is 65536(64K). But the type of length and page_offset are u16, they will
overflow. So change them to u32.
Fixes: 6fe6611ff2 ("net: add Hisilicon Network Subsystem hnae framework support")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kevin Yang says:
====================
tcp_bbr: PROBE_RTT minor bug fixes
This series includes two minor bug fixes for the TCP BBR PROBE_RTT
mechanism, and one preparatory patch:
(1) A preparatory patch to reorganize the PROBE_RTT logic by refactoring
(into its own function) the code to exit PROBE_RTT, since the next
patch will be using that code in a new context.
(2) Fix: When BBR restarts from idle and if BBR is in PROBE_RTT mode,
BBR should check if it's time to exit PROBE_RTT. If yes, then BBR
should exit PROBE_RTT mode and restore the cwnd to its full value.
(3) Fix: Apply the PROBE_RTT cwnd cap even if the count of fully-ACKed
packets is 0.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit fixes a corner case where TCP BBR would enter PROBE_RTT
mode but not reduce its cwnd. If a TCP receiver ACKed less than one
full segment, the number of delivered/acked packets was 0, so that
bbr_set_cwnd() would short-circuit and exit early, without cutting
cwnd to the value we want for PROBE_RTT.
The fix is to instead make sure that even when 0 full packets are
ACKed, we do apply all the appropriate caps, including the cap that
applies in PROBE_RTT mode.
Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Kevin Yang <yyd@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fix the case where BBR does not exit PROBE_RTT mode when
it restarts from idle. When BBR restarts from idle and if BBR is in
PROBE_RTT mode, BBR should check if it's time to exit PROBE_RTT. If
yes, then BBR should exit PROBE_RTT mode and restore the cwnd to its
full value.
Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Kevin Yang <yyd@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch add a helper function bbr_check_probe_rtt_done() to
1. check the condition to see if bbr should exit probe_rtt mode;
2. process the logic of exiting probe_rtt mode.
Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Kevin Yang <yyd@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
tcp uses per-cpu (and per namespace) sockets (net->ipv4.tcp_sk) internally
to send some control packets.
1) RST packets, through tcp_v4_send_reset()
2) ACK packets in SYN-RECV and TIME-WAIT state, through tcp_v4_send_ack()
These packets assert IP_DF, and also use the hashed IP ident generator
to provide an IPv4 ID number.
Geoff Alexander reported this could be used to build off-path attacks.
These packets should not be fragmented, since their size is smaller than
IPV4_MIN_MTU. Only some tunneled paths could eventually have to fragment,
regardless of inner IPID.
We really can use zero IPID, to address the flaw, and as a bonus,
avoid a couple of atomic operations in ip_idents_reserve()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Geoff Alexander <alexandg@cs.unm.edu>
Tested-by: Geoff Alexander <alexandg@cs.unm.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
All the 3 callers of addrconf_add_mroute() assert RTNL
lock, they don't take any additional lock either, so
it is safe to convert it to GFP_KERNEL.
Same for sit_add_v4_addrs().
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The new tcf_exts_for_each_action() macro doesn't reference its
arguments when CONFIG_NET_CLS_ACT is disabled, which leads to
a harmless warning in at least one driver:
drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c: In function 'tc_fill_actions':
drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c:64:6: error: unused variable 'i' [-Werror=unused-variable]
Adding a cast to void lets us avoid this kind of warning.
To be on the safe side, do it for all three arguments, not
just the one that caused the warning.
Fixes: 244cd96adb ("net_sched: remove list_head from tc_action")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The TC filter flow mapping override completely skipped the call to
cake_hash(); however that meant that the internal state was not being
updated, which ultimately leads to deadlocks in some configurations. Fix
that by passing the overridden flow ID into cake_hash() instead so it can
react appropriately.
In addition, the major number of the class ID can now be set to override
the host mapping in host isolation mode. If both host and flow are
overridden (or if the respective modes are disabled), flow dissection and
hashing will be skipped entirely; otherwise, the hashing will be kept for
the portions that are not set by the filter.
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
The ncsi_pkg_info_all_nl() .dumpit handler is missing the NLM_F_MULTI
flag, causing additional package information after the first to be lost.
Also fixup a sanity check in ncsi_write_package_info() to reject out of
range package IDs.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
When splitting a huge pmd pte, we need to mark the pmd entry invalid. We
can do that by clearing _PAGE_PRESENT bit. But then that will be taken as a
swap pte. In order to differentiate between the two use a software pte bit
when invalidating.
For regular pte, due to bd5050e38a ("powerpc/mm/radix: Change pte relax
sequence to handle nest MMU hang") we need to mark the pte entry invalid when
relaxing access permission. Instead of marking pte_none which can result in
different page table walk routines possibly skipping this pte entry, invalidate
it but still keep it marked present.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Commit 5769beaf18 ("powerpc/mm: Add proper pte access check helper
for other platforms") replaced generic pte_access_permitted() by an
arch specific one.
The generic one is defined as
(pte_present(pte) && (!(write) || pte_write(pte)))
The arch specific one is open coded checking that _PAGE_USER and
_PAGE_WRITE (_PAGE_RW) flags are set, but lacking to check that
_PAGE_RO and _PAGE_PRIVILEGED are unset, leading to a useless test
on targets like the 8xx which defines _PAGE_RW and _PAGE_USER as 0.
Commit 5fa5b16be5 ("powerpc/mm/hugetlb: Use pte_access_permitted
for hugetlb access check") replaced some tests performed with
pte helpers by a call to pte_access_permitted(), leading to the same
issue.
This patch rewrites powerpc/nohash pte_access_permitted()
using pte helpers.
Fixes: 5769beaf18 ("powerpc/mm: Add proper pte access check helper for other platforms")
Fixes: 5fa5b16be5 ("powerpc/mm/hugetlb: Use pte_access_permitted for hugetlb access check")
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Revert commits:
95b0e6357d x86/mm/tlb: Always use lazy TLB mode
64482aafe5 x86/mm/tlb: Only send page table free TLB flush to lazy TLB CPUs
ac03158969 x86/mm/tlb: Make lazy TLB mode lazier
61d0beb579 x86/mm/tlb: Restructure switch_mm_irqs_off()
2ff6ddf19c x86/mm/tlb: Leave lazy TLB mode at page table free time
In order to simplify the TLB invalidate fixes for x86 and unify the
parts that need backporting. We'll try again later.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit cafa0010cd ("Raise the minimum required gcc version to 4.6")
recently exposed a brittle part of the build for supporting non-gcc
compilers.
Both Clang and ICC define __GNUC__, __GNUC_MINOR__, and
__GNUC_PATCHLEVEL__ for quick compatibility with code bases that haven't
added compiler specific checks for __clang__ or __INTEL_COMPILER.
This is brittle, as they happened to get compatibility by posing as a
certain version of GCC. This broke when upgrading the minimal version
of GCC required to build the kernel, to a version above what ICC and
Clang claim to be.
Rather than always including compiler-gcc.h then undefining or
redefining macros in compiler-intel.h or compiler-clang.h, let's
separate out the compiler specific macro definitions into mutually
exclusive headers, do more proper compiler detection, and keep shared
definitions in compiler_types.h.
Fixes: cafa0010cd ("Raise the minimum required gcc version to 4.6")
Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Eli Friedman <efriedma@codeaurora.org>
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
During review, it was found that the target, service, and srchost
keywords are easily conflated. Add an explainer.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Clean up: The global callback_cred is no longer used, so it can be
removed.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
I've had trouble when operating a multi-homed Linux NFS server with
Kerberos using NFSv4.0. Lately, I've seen my clients reporting
this (and then hanging):
May 9 11:43:26 manet kernel: NFS: NFSv4 callback contains invalid cred
The client-side commit f11b2a1cfb ("nfs4: copy acceptor name from
context to nfs_client") appears to be related, but I suspect this
problem has been going on for some time before that.
RFC 7530 Section 3.3.3 says:
> For Kerberos V5, nfs/hostname would be a server principal in the
> Kerberos Key Distribution Center database. This is the same
> principal the client acquired a GSS-API context for when it issued
> the SETCLIENTID operation ...
In other words, an NFSv4.0 client expects that the server will use
the same GSS principal for callback that the client used to
establish its lease. For example, if the client used the service
principal "nfs@server.domain" to establish its lease, the server
is required to use "nfs@server.domain" when performing NFSv4.0
callback operations.
The Linux NFS server currently does not. It uses a common service
principal for all callback connections. Sometimes this works as
expected, and other times -- for example, when the server is
accessible via multiple hostnames -- it won't work at all.
This patch scrapes the target name from the client credential,
and uses that for the NFSv4.0 callback credential. That should
be correct much more often.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
NFSv4.0 callback needs to know the GSS target name the client used
when it established its lease. That information is available from
the GSS context created by gssproxy. Make it available in each
svc_cred.
Note this will also give us access to the real target service
principal name (which is typically "nfs", but spec does not require
that).
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
A multi-homed NFS server may have more than one "nfs" key in its
keytab. Enable the kernel to pick the key it wants as a machine
credential when establishing a GSS context.
This is useful for GSS-protected NFSv4.0 callbacks, which are
required by RFC 7530 S3.3.3 to use the same principal as the service
principal the client used when establishing its lease.
A complementary modification to rpc.gssd is required to fully enable
this feature.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The driver for Silead touchscreen configurations has been renamed
from silead_dmi to touchscreen_dmi since it starts supporting other
touchscreens which require some DMI quirks. At the same release cycle
it gets expanded to cover cases for Chuwi Vi10, ONDA V891W,
Connect Tablet 9, Onda V820w, and Cube KNote i1101 tablets.
Another bunch of changes is related to Mellanox platform code to allow
user space to communicate with Mellanox for system control and
monitoring purposes. The driver notifies user on hotplug device signal
receiving.
ASUS WMI drivers recognize lid flip action on UX360, and correctly
toggles airplane mode LED. In addition the keyboard backlight toggle
gets support.
ThinkPad ACPI driver enables support for calculator key (on at least P52).
It also has been fixed to support three characters model designators,
which are used for modern laptops. Earlier the battery, marked as BAT1,
on ThinkPad laptops has not been configured properly, which is fixed.
On the opposite the multi-battery configurations now probed correctly.
Dell SMBIOS driver starts working on some Dell servers which do not
support token interface. The regression with backlight detection has
also been fixed. In order to support dock mode on some laptops,
Intel virtual button driver has been fixed. The last but not least
is the fix to Intel HID driver due to changes in Dell systems that
prevented to use power button.
The following is an automated git shortlog grouped by driver:
acer-wmi:
- Silence "unsupported" message a bit
- refactor function has_cap
asus-nb-wmi:
- Add keymap entry for lid flip action on UX360
asus-wireless:
- Fix uninitialized symbol usage
- Toggle airplane mode LED
asus-wmi:
- Add keyboard backlight toggle support
- Call led hw_changed API on kbd brightness change
dell-laptop:
- Fix backlight detection
dell-smbios:
- make a function and a pointer static
dell-smbios-base:
- Support systems without tokens
dell-smbios-wmi:
- make function dell_smbios_wmi_call static
ideapad-laptop:
- Add Y520-15IKBM and Y720-15IKBM to no_hw_rfkill
- Apply no_hw_rfkill to Y20-15IKBM, too
intel-hid:
- Add support for Device Specific Methods
intel_ips:
- remove redundant variables slope and offset
intel_pmc_core:
- Add CNP SLPS0 debug registers
intel_punit_ipc:
- fix build errors
intel-vbtn:
- Add support for dock mode detection
mlx-platform:
- Fix copy-paste error in mlxplat_init()
- Remove unused define
- Change mlxreg-io configuration for MSN274x systems
- Allow mlxreg-io driver activation for more systems
- Add ASIC hotplug device configuration
- Add new attribute for mlxreg-io sysfs interfaces
- Add mlxreg-fan platform driver activation
- Add documentation mlxreg-io sysfs interfaces
- Add mlxreg-io platform driver activation
platform/mellanox:
- mlxreg-hotplug: Add hotplug hwmon uevent notification
- mlxreg-hotplug: Improve mechanism of ASIC health discovery
- Use 2-factor allocator calls
- Introduce support for Mellanox register access driver
thinkpad_acpi:
- Fix multi-battery bug
- extend battery quirk coverage
- Support battery quirk
- Proper model/release matching
- Add support for calculator hotkey
toshiba_acpi:
- Fix defined but not used build warnings
- Update KBD backlight LED on second gen laptops
touchscreen_dmi:
- Rename silead_dmi to touchscreen_dmi
- Add touchscreen info for the Chuwi Vi10 tablet
- Sort entries alphabetically
- Rename trekstor entries
- Add info for the Cube KNote i1101 tablet
- Add info for the Onda V820w tablet
- Add info for the "Connect Tablet 9" tablet
- Add info for the ONDA V891W Dual OS tablet
wmi:
- Do not mix pages and kmalloc
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Merge tag 'platform-drivers-x86-v4.19-1' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver updates from Andy Shevchenko:
- The driver for Silead touchscreen configurations has been renamed
from silead_dmi to touchscreen_dmi since it starts supporting other
touchscreens which require some DMI quirks
It also gets expanded to cover cases for Chuwi Vi10, ONDA V891W,
Connect Tablet 9, Onda V820w, and Cube KNote i1101 tablets.
- Another bunch of changes is related to Mellanox platform code to
allow user space to communicate with Mellanox for system control and
monitoring purposes. The driver notifies user on hotplug device
signal receiving.
- ASUS WMI drivers recognize lid flip action on UX360, and correctly
toggles airplane mode LED. In addition the keyboard backlight toggle
gets support.
- ThinkPad ACPI driver enables support for calculator key (on at least
P52). It also has been fixed to support three characters model
designators, which are used for modern laptops. Earlier the battery,
marked as BAT1, on ThinkPad laptops has not been configured properly,
which is fixed. On the opposite the multi-battery configurations now
probed correctly.
- Dell SMBIOS driver starts working on some Dell servers which do not
support token interface. The regression with backlight detection has
also been fixed. In order to support dock mode on some laptops, Intel
virtual button driver has been fixed. The last but not least is the
fix to Intel HID driver due to changes in Dell systems that prevented
to use power button.
* tag 'platform-drivers-x86-v4.19-1' of git://git.infradead.org/linux-platform-drivers-x86: (47 commits)
platform/x86: acer-wmi: Silence "unsupported" message a bit
platform/x86: intel_punit_ipc: fix build errors
platform/x86: ideapad: Add Y520-15IKBM and Y720-15IKBM to no_hw_rfkill
platform/x86: asus-nb-wmi: Add keymap entry for lid flip action on UX360
platform/x86: acer-wmi: refactor function has_cap
platform/x86: thinkpad_acpi: Fix multi-battery bug
platform/x86: thinkpad_acpi: extend battery quirk coverage
platform/x86: touchscreen_dmi: Add info for the Cube KNote i1101 tablet
platform/x86: mlx-platform: Fix copy-paste error in mlxplat_init()
platform/x86: mlx-platform: Remove unused define
platform/x86: mlx-platform: Change mlxreg-io configuration for MSN274x systems
Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces
platform/x86: mlx-platform: Allow mlxreg-io driver activation for more systems
platform/x86: mlx-platform: Add ASIC hotplug device configuration
platform/mellanox: mlxreg-hotplug: Add hotplug hwmon uevent notification
platform/mellanox: mlxreg-hotplug: Improve mechanism of ASIC health discovery
platform/x86: mlx-platform: Add mlxreg-fan platform driver activation
platform/x86: dell-laptop: Fix backlight detection
platform/x86: toshiba_acpi: Fix defined but not used build warnings
platform/x86: thinkpad_acpi: Support battery quirk
...
This has been broken for an embarassingly long time (since v4.4).
Just needs a couple of __init tags on functions to make the sections
match up.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We need to do this inside the loop as well, or we can allow new
IO to supersede previous IO.
Tested-by: Anchal Agarwal <anchalag@amazon.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
We need the memory barrier before checking the list head,
use the appropriate helper for this. The matching queue
side memory barrier is provided by set_current_state().
Tested-by: Anchal Agarwal <anchalag@amazon.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
