1. 25 Sep, 2018 5 commits
    • Greg Kroah-Hartman's avatar
      Merge tag 'usb-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · bfb0e9b4
      Greg Kroah-Hartman authored
      I wrote:
        "USB fixes for 4.19-rc6
      
         Here are some small USB core and driver fixes for reported issues for
         4.19-rc6.
      
         The most visible is the oops fix for when the USB core is built into the
         kernel that is present in 4.18.  Turns out not many people actually do
         that so it went unnoticed for a while.  The rest is some tiny typec,
         musb, and other core fixes.
      
         All have been in linux-next with no reported issues."
      
      * tag 'usb-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        usb: typec: mux: Take care of driver module reference counting
        usb: core: safely deal with the dynamic quirk lists
        usb: roles: Take care of driver module reference counting
        USB: handle NULL config in usb_find_alt_setting()
        USB: fix error handling in usb_driver_claim_interface()
        USB: remove LPM management from usb_driver_claim_interface()
        USB: usbdevfs: restore warning for nonsensical flags
        USB: usbdevfs: sanitize flags more
        Revert "usb: cdc-wdm: Fix a sleep-in-atomic-context bug in service_outstanding_interrupt()"
        usb: musb: dsps: do not disable CPPI41 irq in driver teardown
      bfb0e9b4
    • Greg Kroah-Hartman's avatar
      Merge tag 'tty-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · ccf791e5
      Greg Kroah-Hartman authored
      I wrote:
        "TTY/Serial driver fixes for 4.19-rc6
      
         Here are a number of small tty and serial driver fixes for reported
         issues for 4.19-rc6.
      
         One should hopefully resolve a much-reported issue that syzbot has found
         in the tty layer.  Although there are still more issues there, getting
         this fixed is nice to see finally happen.
      
         All of these have been in linux-next for a while with no reported
         issues."
      
      * tag 'tty-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        serial: imx: restore handshaking irq for imx1
        tty: vt_ioctl: fix potential Spectre v1
        tty: Drop tty->count on tty_reopen() failure
        serial: cpm_uart: return immediately from console poll
        tty: serial: lpuart: avoid leaking struct tty_struct
        serial: mvebu-uart: Fix reporting of effective CSIZE to userspace
      ccf791e5
    • Greg Kroah-Hartman's avatar
      Merge tag 'char-misc-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · fc0c8146
      Greg Kroah-Hartman authored
      Greg (well I), wrote:
        "Char/Misc driver fixes for 4.19-rc6
      
         Here are some soundwire and intel_th (tracing) driver fixes for some
         reported issues.
      
         All of these have been in linux-next for a week with no reported issues."
      
      * tag 'char-misc-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        intel_th: pci: Add Ice Lake PCH support
        intel_th: Fix resource handling for ACPI glue layer
        intel_th: Fix device removal logic
        soundwire: Fix acquiring bus lock twice during master release
        soundwire: Fix incorrect exit after configuring stream
        soundwire: Fix duplicate stream state assignment
      fc0c8146
    • Lubomir Rintel's avatar
      Revert "uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name" · 8c0f9f5b
      Lubomir Rintel authored
      This changes UAPI, breaking iwd and libell:
      
        ell/key.c: In function 'kernel_dh_compute':
        ell/key.c:205:38: error: 'struct keyctl_dh_params' has no member named 'private'; did you mean 'dh_private'?
          struct keyctl_dh_params params = { .private = private,
                                              ^~~~~~~
                                              dh_private
      
      This reverts commit 8a2336e5.
      
      Fixes: 8a2336e5 ("uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name")
      Signed-off-by: default avatarLubomir Rintel <lkundrak@v3.sk>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      cc: Randy Dunlap <rdunlap@infradead.org>
      cc: Mat Martineau <mathew.j.martineau@linux.intel.com>
      cc: Stephan Mueller <smueller@chronox.de>
      cc: James Morris <jmorris@namei.org>
      cc: "Serge E. Hallyn" <serge@hallyn.com>
      cc: Mat Martineau <mathew.j.martineau@linux.intel.com>
      cc: Andrew Morton <akpm@linux-foundation.org>
      cc: Linus Torvalds <torvalds@linux-foundation.org>
      cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarJames Morris <james.morris@microsoft.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      8c0f9f5b
    • Greg Kroah-Hartman's avatar
      Merge gitolite.kernel.org:/pub/scm/linux/kernel/git/davem/net · 2dd68cc7
      Greg Kroah-Hartman authored
      Dave writes:
        "Networking fixes:
      
        1) Fix multiqueue handling of coalesce timer in stmmac, from Jose
           Abreu.
      
         2) Fix memory corruption in NFC, from Suren Baghdasaryan.
      
         3) Don't write reserved bits in ravb driver, from Kazuya Mizuguchi.
      
         4) SMC bug fixes from Karsten Graul, YueHaibing, and Ursula Braun.
      
         5) Fix TX done race in mvpp2, from Antoine Tenart.
      
         6) ipv6 metrics leak, from Wei Wang.
      
         7) Adjust firmware version requirements in mlxsw, from Petr Machata.
      
         8) Fix autonegotiation on resume in r8169, from Heiner Kallweit.
      
         9) Fixed missing entries when dumping /proc/net/if_inet6, from Jeff
            Barnhill.
      
         10) Fix double free in devlink, from Dan Carpenter.
      
         11) Fix ethtool regression from UFO feature removal, from Maciej
             Żenczykowski.
      
         12) Fix drivers that have a ndo_poll_controller() that captures the
             cpu entirely on loaded hosts by trying to drain all rx and tx
             queues, from Eric Dumazet.
      
         13) Fix memory corruption with jumbo frames in aquantia driver, from
             Friedemann Gerold."
      
      * gitolite.kernel.org:/pub/scm/linux/kernel/git/davem/net: (79 commits)
        net: mvneta: fix the remaining Rx descriptor unmapping issues
        ip_tunnel: be careful when accessing the inner header
        mpls: allow routes on ip6gre devices
        net: aquantia: memory corruption on jumbo frames
        tun: remove ndo_poll_controller
        nfp: remove ndo_poll_controller
        bnxt: remove ndo_poll_controller
        bnx2x: remove ndo_poll_controller
        mlx5: remove ndo_poll_controller
        mlx4: remove ndo_poll_controller
        i40evf: remove ndo_poll_controller
        ice: remove ndo_poll_controller
        igb: remove ndo_poll_controller
        ixgb: remove ndo_poll_controller
        fm10k: remove ndo_poll_controller
        ixgbevf: remove ndo_poll_controller
        ixgbe: remove ndo_poll_controller
        bonding: use netpoll_poll_dev() helper
        netpoll: make ndo_poll_controller() optional
        rds: Fix build regression.
        ...
      2dd68cc7
  2. 24 Sep, 2018 22 commits
    • Antoine Tenart's avatar
      net: mvneta: fix the remaining Rx descriptor unmapping issues · f4a51879
      Antoine Tenart authored
      With CONFIG_DMA_API_DEBUG enabled we get DMA unmapping warning in
      various places of the mvneta driver, for example when putting down an
      interface while traffic is passing through.
      
      The issue is when using s/w buffer management, the Rx buffers are mapped
      using dma_map_page but unmapped with dma_unmap_single. This patch fixes
      this by using the right unmapping function.
      
      Fixes: 562e2f46 ("net: mvneta: Improve the buffer allocation method for SWBM")
      Signed-off-by: default avatarAntoine Tenart <antoine.tenart@bootlin.com>
      Reviewed-by: default avatarGregory CLEMENT <gregory.clement@bootlin.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f4a51879
    • Paolo Abeni's avatar
      ip_tunnel: be careful when accessing the inner header · ccfec9e5
      Paolo Abeni authored
      Cong noted that we need the same checks introduced by commit 76c0ddd8
      ("ip6_tunnel: be careful when accessing the inner header")
      even for ipv4 tunnels.
      
      Fixes: c5441932 ("GRE: Refactor GRE tunneling code.")
      Suggested-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ccfec9e5
    • Saif Hasan's avatar
      mpls: allow routes on ip6gre devices · d8e2262a
      Saif Hasan authored
      Summary:
      
      This appears to be necessary and sufficient change to enable `MPLS` on
      `ip6gre` tunnels (RFC4023).
      
      This diff allows IP6GRE devices to be recognized by MPLS kernel module
      and hence user can configure interface to accept packets with mpls
      headers as well setup mpls routes on them.
      
      Test Plan:
      
      Test plan consists of multiple containers connected via GRE-V6 tunnel.
      Then carrying out testing steps as below.
      
      - Carry out necessary sysctl settings on all containers
      
      ```
      sysctl -w net.mpls.platform_labels=65536
      sysctl -w net.mpls.ip_ttl_propagate=1
      sysctl -w net.mpls.conf.lo.input=1
      ```
      
      - Establish IP6GRE tunnels
      
      ```
      ip -6 tunnel add name if_1_2_1 mode ip6gre \
        local 2401:db00:21:6048:feed:0::1 \
        remote 2401:db00:21:6048:feed:0::2 key 1
      ip link set dev if_1_2_1 up
      sysctl -w net.mpls.conf.if_1_2_1.input=1
      ip -4 addr add 169.254.0.2/31 dev if_1_2_1 scope link
      
      ip -6 tunnel add name if_1_3_1 mode ip6gre \
        local 2401:db00:21:6048:feed:0::1 \
        remote 2401:db00:21:6048:feed:0::3 key 1
      ip link set dev if_1_3_1 up
      sysctl -w net.mpls.conf.if_1_3_1.input=1
      ip -4 addr add 169.254.0.4/31 dev if_1_3_1 scope link
      ```
      
      - Install MPLS encap rules on node-1 towards node-2
      
      ```
      ip route add 192.168.0.11/32 nexthop encap mpls 32/64 \
        via inet 169.254.0.3 dev if_1_2_1
      ```
      
      - Install MPLS forwarding rules on node-2 and node-3
      ```
      // node2
      ip -f mpls route add 32 via inet 169.254.0.7 dev if_2_4_1
      
      // node3
      ip -f mpls route add 64 via inet 169.254.0.12 dev if_4_3_1
      ```
      
      - Ping 192.168.0.11 (node4) from 192.168.0.1 (node1) (where routing
        towards 192.168.0.1 is via IP route directly towards node1 from node4)
      ```
      ping 192.168.0.11
      ```
      
      - tcpdump on interface to capture ping packets wrapped within MPLS
        header which inturn wrapped within IP6GRE header
      
      ```
      16:43:41.121073 IP6
        2401:db00:21:6048:feed::1 > 2401:db00:21:6048:feed::2:
        DSTOPT GREv0, key=0x1, length 100:
        MPLS (label 32, exp 0, ttl 255) (label 64, exp 0, [S], ttl 255)
        IP 192.168.0.1 > 192.168.0.11:
        ICMP echo request, id 1208, seq 45, length 64
      
      0x0000:  6000 2cdb 006c 3c3f 2401 db00 0021 6048  `.,..l<?$....!`H
      0x0010:  feed 0000 0000 0001 2401 db00 0021 6048  ........$....!`H
      0x0020:  feed 0000 0000 0002 2f00 0401 0401 0100  ......../.......
      0x0030:  2000 8847 0000 0001 0002 00ff 0004 01ff  ...G............
      0x0040:  4500 0054 3280 4000 ff01 c7cb c0a8 0001  E..T2.@.........
      0x0050:  c0a8 000b 0800 a8d7 04b8 002d 2d3c a05b  ...........--<.[
      0x0060:  0000 0000 bcd8 0100 0000 0000 1011 1213  ................
      0x0070:  1415 1617 1819 1a1b 1c1d 1e1f 2021 2223  .............!"#
      0x0080:  2425 2627 2829 2a2b 2c2d 2e2f 3031 3233  $%&'()*+,-./0123
      0x0090:  3435 3637                                4567
      ```
      Signed-off-by: default avatarSaif Hasan <has@fb.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d8e2262a
    • David S. Miller's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf · d2f85c9e
      David S. Miller authored
      Daniel Borkmann says:
      
      ====================
      pull-request: bpf 2018-09-24
      
      The following pull-request contains BPF updates for your *net* tree.
      
      The main changes are:
      
      1) Several fixes for BPF sockmap to only allow sockets being attached in
         ESTABLISHED state, from John.
      
      2) Fix up the license to LGPL/BSD for the libc compat header which contains
         fallback helpers that libbpf and bpftool is using, from Jakub.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d2f85c9e
    • Greg Kroah-Hartman's avatar
      Merge tag 'media/v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · 02214bfc
      Greg Kroah-Hartman authored
      Mauro briefly writes:
        "media fixes for v4.19-rc5
      
         some drivers and Kbuild fixes"
      
      * tag 'media/v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
        media: platform: fix cros-ec-cec build error
        media: staging/media/mt9t031/Kconfig: remove bogus entry
        media: i2c: mt9v111: Fix v4l2-ctrl error handling
        media: camss: add missing includes
        media: camss: Use managed memory allocations
        media: camss: mark PM functions as __maybe_unused
        media: af9035: prevent buffer overflow on write
        media: video_function_calls.rst: drop obsolete video-set-attributes reference
      02214bfc
    • Friedemann Gerold's avatar
      net: aquantia: memory corruption on jumbo frames · d26ed6b0
      Friedemann Gerold authored
      This patch fixes skb_shared area, which will be corrupted
      upon reception of 4K jumbo packets.
      
      Originally build_skb usage purpose was to reuse page for skb to eliminate
      needs of extra fragments. But that logic does not take into account that
      skb_shared_info should be reserved at the end of skb data area.
      
      In case packet data consumes all the page (4K), skb_shinfo location
      overflows the page. As a consequence, __build_skb zeroed shinfo data above
      the allocated page, corrupting next page.
      
      The issue is rarely seen in real life because jumbo are normally larger
      than 4K and that causes another code path to trigger.
      But it 100% reproducible with simple scapy packet, like:
      
          sendp(IP(dst="192.168.100.3") / TCP(dport=443) \
                / Raw(RandString(size=(4096-40))), iface="enp1s0")
      
      Fixes: 018423e9 ("net: ethernet: aquantia: Add ring support code")
      Reported-by: default avatarFriedemann Gerold <f.gerold@b-c-s.de>
      Reported-by: default avatarMichael Rauch <michael@rauch.be>
      Signed-off-by: default avatarFriedemann Gerold <f.gerold@b-c-s.de>
      Tested-by: default avatarNikita Danilov <nikita.danilov@aquantia.com>
      Signed-off-by: default avatarIgor Russkikh <igor.russkikh@aquantia.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d26ed6b0
    • David S. Miller's avatar
      Merge branch 'netpoll-avoid-capture-effects-for-NAPI-drivers' · 841dfa43
      David S. Miller authored
      Eric Dumazet says:
      
      ====================
      netpoll: avoid capture effects for NAPI drivers
      
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC).
      
      This capture, showing one ksoftirqd eating all cycles
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      It seems that all networking drivers that do use NAPI
      for their TX completions, should not provide a ndo_poll_controller() :
      
      Most NAPI drivers have netpoll support already handled
      in core networking stack, since netpoll_poll_dev()
      uses poll_napi(dev) to iterate through registered
      NAPI contexts for a device.
      
      This patch series take care of the first round, we will
      handle other drivers in future rounds.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      841dfa43
    • Eric Dumazet's avatar
      tun: remove ndo_poll_controller · 765cdc20
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      tun uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      765cdc20
    • Eric Dumazet's avatar
      nfp: remove ndo_poll_controller · 0825ce70
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      nfp uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
      Acked-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
      Tested-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0825ce70
    • Eric Dumazet's avatar
      bnxt: remove ndo_poll_controller · 58e0e22b
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      bnxt uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Michael Chan <michael.chan@broadcom.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      58e0e22b
    • Eric Dumazet's avatar
      bnx2x: remove ndo_poll_controller · d8ea6a91
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      bnx2x uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Ariel Elior <ariel.elior@cavium.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d8ea6a91
    • Eric Dumazet's avatar
      mlx5: remove ndo_poll_controller · 9c29bcd1
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      mlx5 uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Saeed Mahameed <saeedm@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9c29bcd1
    • Eric Dumazet's avatar
      mlx4: remove ndo_poll_controller · a24b66c2
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      mlx4 uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Tariq Toukan <tariqt@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a24b66c2
    • Eric Dumazet's avatar
      i40evf: remove ndo_poll_controller · 1aa28fb9
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      i40evf uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1aa28fb9
    • Eric Dumazet's avatar
      ice: remove ndo_poll_controller · 158a08a6
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      ice uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      158a08a6
    • Eric Dumazet's avatar
      igb: remove ndo_poll_controller · 0542997e
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      igb uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0542997e
    • Eric Dumazet's avatar
      ixgb: remove ndo_poll_controller · 2753166e
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      ixgb uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      
      This also removes a problematic use of disable_irq() in
      a context it is forbidden, as explained in commit
      af3e0fcf ("8139too: Use disable_irq_nosync() in
      rtl8139_poll_controller()")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2753166e
    • Eric Dumazet's avatar
      fm10k: remove ndo_poll_controller · dda9d57e
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      lasts for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      fm10k uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      dda9d57e
    • Eric Dumazet's avatar
      ixgbevf: remove ndo_poll_controller · 6f5d941e
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      ixgbevf uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6f5d941e
    • Eric Dumazet's avatar
      ixgbe: remove ndo_poll_controller · b80e71a9
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      ixgbe uses NAPI for TX completions, so we better let core
      networking stack call the napi->poll() to avoid the capture.
      Reported-by: default avatarSong Liu <songliubraving@fb.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Tested-by: default avatarSong Liu <songliubraving@fb.com>
      Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b80e71a9
    • Eric Dumazet's avatar
      bonding: use netpoll_poll_dev() helper · 93f62ad5
      Eric Dumazet authored
      We want to allow NAPI drivers to no longer provide
      ndo_poll_controller() method, as it has been proven problematic.
      
      team driver must not look at its presence, but instead call
      netpoll_poll_dev() which factorize the needed actions.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Jay Vosburgh <j.vosburgh@gmail.com>
      Cc: Veaceslav Falico <vfalico@gmail.com>
      Cc: Andy Gospodarek <andy@greyhouse.net>
      Acked-by: default avatarJay Vosburgh <jay.vosburgh@canonical.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      93f62ad5
    • Eric Dumazet's avatar
      netpoll: make ndo_poll_controller() optional · ac3d9dd0
      Eric Dumazet authored
      As diagnosed by Song Liu, ndo_poll_controller() can
      be very dangerous on loaded hosts, since the cpu
      calling ndo_poll_controller() might steal all NAPI
      contexts (for all RX/TX queues of the NIC). This capture
      can last for unlimited amount of time, since one
      cpu is generally not able to drain all the queues under load.
      
      It seems that all networking drivers that do use NAPI
      for their TX completions, should not provide a ndo_poll_controller().
      
      NAPI drivers have netpoll support already handled
      in core networking stack, since netpoll_poll_dev()
      uses poll_napi(dev) to iterate through registered
      NAPI contexts for a device.
      
      This patch allows netpoll_poll_dev() to process NAPI
      contexts even for drivers not providing ndo_poll_controller(),
      allowing for following patches in NAPI drivers.
      
      Also we export netpoll_poll_dev() so that it can be called
      by bonding/team drivers in following patches.
      Reported-by: default avatarSong Liu <songliubraving@fb.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Tested-by: default avatarSong Liu <songliubraving@fb.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ac3d9dd0
  3. 23 Sep, 2018 9 commits
  4. 22 Sep, 2018 4 commits
    • Nathan Chancellor's avatar
      RDS: IB: Use DEFINE_PER_CPU_SHARED_ALIGNED for rds_ib_stats · 8360ed67
      Nathan Chancellor authored
      Clang warns when two declarations' section attributes don't match.
      
      net/rds/ib_stats.c:40:1: warning: section does not match previous
      declaration [-Wsection]
      DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats);
      ^
      ./include/linux/percpu-defs.h:142:2: note: expanded from macro
      'DEFINE_PER_CPU_SHARED_ALIGNED'
              DEFINE_PER_CPU_SECTION(type, name,
      PER_CPU_SHARED_ALIGNED_SECTION) \
              ^
      ./include/linux/percpu-defs.h:93:9: note: expanded from macro
      'DEFINE_PER_CPU_SECTION'
              extern __PCPU_ATTRS(sec) __typeof__(type) name;
      \
                     ^
      ./include/linux/percpu-defs.h:49:26: note: expanded from macro
      '__PCPU_ATTRS'
              __percpu __attribute__((section(PER_CPU_BASE_SECTION sec)))
      \
                                      ^
      net/rds/ib.h:446:1: note: previous attribute is here
      DECLARE_PER_CPU(struct rds_ib_statistics, rds_ib_stats);
      ^
      ./include/linux/percpu-defs.h:111:2: note: expanded from macro
      'DECLARE_PER_CPU'
              DECLARE_PER_CPU_SECTION(type, name, "")
              ^
      ./include/linux/percpu-defs.h:87:9: note: expanded from macro
      'DECLARE_PER_CPU_SECTION'
              extern __PCPU_ATTRS(sec) __typeof__(type) name
                     ^
      ./include/linux/percpu-defs.h:49:26: note: expanded from macro
      '__PCPU_ATTRS'
              __percpu __attribute__((section(PER_CPU_BASE_SECTION sec)))
      \
                                      ^
      1 warning generated.
      
      The initial definition was added in commit ec16227e ("RDS/IB:
      Infiniband transport") and the cache aligned definition was added in
      commit e6babe4c ("RDS/IB: Stats and sysctls") right after. The
      definition probably should have been updated in net/rds/ib.h, which is
      what this patch does.
      
      Link: https://github.com/ClangBuiltLinux/linux/issues/114Signed-off-by: default avatarNathan Chancellor <natechancellor@gmail.com>
      Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8360ed67
    • Omar Sandoval's avatar
      block: use nanosecond resolution for iostat · b57e99b4
      Omar Sandoval authored
      Klaus Kusche reported that the I/O busy time in /proc/diskstats was not
      updating properly on 4.18. This is because we started using ktime to
      track elapsed time, and we convert nanoseconds to jiffies when we update
      the partition counter. However, this gets rounded down, so any I/Os that
      take less than a jiffy are not accounted for. Previously in this case,
      the value of jiffies would sometimes increment while we were doing I/O,
      so at least some I/Os were accounted for.
      
      Let's convert the stats to use nanoseconds internally. We still report
      milliseconds as before, now more accurately than ever. The value is
      still truncated to 32 bits for backwards compatibility.
      
      Fixes: 522a7775 ("block: consolidate struct request timestamp fields")
      Cc: stable@vger.kernel.org
      Reported-by: default avatarKlaus Kusche <klaus.kusche@computerix.info>
      Signed-off-by: default avatarOmar Sandoval <osandov@fb.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      b57e99b4
    • Nathan Chancellor's avatar
      net/mlx4: Use cpumask_available for eq->affinity_mask · 8ac1ee6f
      Nathan Chancellor authored
      Clang warns that the address of a pointer will always evaluated as true
      in a boolean context:
      
      drivers/net/ethernet/mellanox/mlx4/eq.c:243:11: warning: address of
      array 'eq->affinity_mask' will always evaluate to 'true'
      [-Wpointer-bool-conversion]
              if (!eq->affinity_mask || cpumask_empty(eq->affinity_mask))
                  ~~~~~^~~~~~~~~~~~~
      1 warning generated.
      
      Use cpumask_available, introduced in commit f7e30f01 ("cpumask: Add
      helper cpumask_available()"), which does the proper checking and avoids
      this warning.
      
      Link: https://github.com/ClangBuiltLinux/linux/issues/86Signed-off-by: default avatarNathan Chancellor <natechancellor@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8ac1ee6f
    • Dan Carpenter's avatar
      devlink: double free in devlink_resource_fill() · 83fe9a96
      Dan Carpenter authored
      Smatch reports that devlink_dpipe_send_and_alloc_skb() frees the skb
      on error so this is a double free.  We fixed a bunch of these bugs in
      commit 7fe4d6dc ("devlink: Remove redundant free on error path") but
      we accidentally overlooked this one.
      
      Fixes: d9f9b9a4 ("devlink: Add support for resource abstraction")
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      83fe9a96