1. 05 Sep, 2017 15 commits
    • Jason Wang's avatar
      tun: rename generic_xdp to skb_xdp · 1cfe6e93
      Jason Wang authored
      Rename "generic_xdp" to "skb_xdp" to avoid confusing it with the
      generic XDP which will be done at netif_receive_skb().
      
      Cc: Daniel Borkmann <daniel@iogearbox.net>
      Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1cfe6e93
    • Jason Wang's avatar
      tun: reserve extra headroom only when XDP is set · 7df13219
      Jason Wang authored
      We reserve headroom unconditionally which could cause unnecessary
      stress on socket memory accounting because of increased trusesize. Fix
      this by only reserve extra headroom when XDP is set.
      
      Cc: Jakub Kicinski <kubakici@wp.pl>
      Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7df13219
    • David S. Miller's avatar
      Merge branch 'dsa-tx-queues' · 9e776f22
      David S. Miller authored
      Florian Fainelli says:
      
      ====================
      net: dsa: Allow switch drivers to indicate number of TX queues
      
      This patch series extracts the parts of the patch set that are likely not to be
      controversial and actually bringing multi-queue support to DSA-created network
      devices.
      
      With these patches, we can now use sch_multiq as documented under
      Documentation/networking/multique.txt and let applications dedice the switch
      port output queue they want to use. Currently only Broadcom tags utilize that
      information.
      
      Resending based on David's feedback regarding the patches not in patchwork.
      
      Changes in v2:
      - use a proper define for the number of TX queues in bcm_sf2.c (Andrew)
      
      Changes from RFC:
      
      - dropped the ability to configure RX queues since we don't do anything with
        those just yet
      - dropped the patches that dealt with binding the DSA slave network devices
        queues with their master network devices queues this will be worked on
        separately.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9e776f22
    • Florian Fainelli's avatar
      net: dsa: bcm_sf2: Configure IMP port TC2QOS mapping · c837fc81
      Florian Fainelli authored
      Even though TC2QOS mapping is for switch egress queues, we need to
      configure it correclty in order for the Broadcom tag ingress (CPU ->
      switch) queue selection to work correctly since there is a 1:1 mapping
      between switch egress queues and ingress queues.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c837fc81
    • Florian Fainelli's avatar
      net: dsa: bcm_sf2: Advertise number of egress queues · 18118377
      Florian Fainelli authored
      The switch supports 8 egress queues per port, so indicate that such that
      net/dsa/slave.c::dsa_slave_create can allocate the right number of TX queues.
      While at it use SF2_NUM_EGRESS_QUEUE as a define for the number of queues we
      support.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      18118377
    • Florian Fainelli's avatar
      net: dsa: tag_brcm: Set output queue from skb queue mapping · 0f15b098
      Florian Fainelli authored
      We originally used skb->priority but that was not quite correct as this
      bitfield needs to contain the egress switch queue we intend to send this
      SKB to.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0f15b098
    • Florian Fainelli's avatar
      net: dsa: Allow switch drivers to indicate number of TX queues · 55199df6
      Florian Fainelli authored
      Let switch drivers indicate how many TX queues they support. Some
      switches, such as Broadcom Starfighter 2 are designed with 8 egress
      queues. Future changes will allow us to leverage the queue mapping and
      direct the transmission towards a particular queue.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      55199df6
    • Ido Schimmel's avatar
      f1c2eddf
    • Thomas Meyer's avatar
      net/mlx4_core: Use ARRAY_SIZE macro · 691223ec
      Thomas Meyer authored
      Use ARRAY_SIZE macro, rather than explicitly coding some variant of it
      yourself.
      Found with: find -type f -name "*.c" -o -name "*.h" | xargs perl -p -i -e
      's/\bsizeof\s*\(\s*(\w+)\s*\)\s*\ /\s*sizeof\s*\(\s*\1\s*\[\s*0\s*\]\s*\)
      /ARRAY_SIZE(\1)/g' and manual check/verification.
      Signed-off-by: default avatarThomas Meyer <thomas@m3y3r.de>
      Reviewed-by: default avatarTariq Toukan <tariqt@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      691223ec
    • David S. Miller's avatar
      Merge branch 'flow_dissector-fixes' · c4492d8a
      David S. Miller authored
      Tom Herbert says:
      
      ====================
      flow_dissector: Flow dissector fixes
      
      This patch set fixes some basic issues with __skb_flow_dissect function.
      
      Items addressed:
        - Cleanup control flow in the function; in particular eliminate a
          bunch of goto's and implement a simplified control flow model
        - Add limits for number of encapsulations and headers that can be
          dissected
      
      v2:
        - Simplify the logic for limits on flow dissection. Just set the
          limit based on the number of headers the flow dissector can
          processes. The accounted headers includes encapsulation headers,
          extension headers, or other shim headers.
      
      Tested:
      
      Ran normal traffic, GUE, and VXLAN traffic.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c4492d8a
    • Tom Herbert's avatar
      flow_dissector: Add limit for number of headers to dissect · 1eed4dfb
      Tom Herbert authored
      In flow dissector there are no limits to the number of nested
      encapsulations or headers that might be dissected which makes for a
      nice DOS attack. This patch sets a limit of the number of headers
      that flow dissector will parse.
      
      Headers includes network layer headers, transport layer headers, shim
      headers for encapsulation, IPv6 extension headers, etc. The limit for
      maximum number of headers to parse has be set to fifteen to account for
      a reasonable number of encapsulations, extension headers, VLAN,
      in a packet. Note that this limit does not supercede the STOP_AT_*
      flags which may stop processing before the headers limit is reached.
      Reported-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
      Signed-off-by: default avatarTom Herbert <tom@quantonium.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1eed4dfb
    • Tom Herbert's avatar
      flow_dissector: Cleanup control flow · 3a1214e8
      Tom Herbert authored
      __skb_flow_dissect is riddled with gotos that make discerning the flow,
      debugging, and extending the capability difficult. This patch
      reorganizes things so that we only perform goto's after the two main
      switch statements (no gotos within the cases now). It also eliminates
      several goto labels so that there are only two labels that can be target
      for goto.
      Reported-by: default avatarAlexander Popov <alex.popov@linux.com>
      Signed-off-by: default avatarTom Herbert <tom@quantonium.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3a1214e8
    • Arnd Bergmann's avatar
      soc: ti/knav_dma: include dmaengine header · 2c08ab3f
      Arnd Bergmann authored
      A header file cleanup apparently caused a build regression
      with one driver using the knav infrastructure:
      
      In file included from drivers/net/ethernet/ti/netcp_core.c:30:0:
      include/linux/soc/ti/knav_dma.h:129:30: error: field 'direction' has incomplete type
        enum dma_transfer_direction direction;
                                    ^~~~~~~~~
      drivers/net/ethernet/ti/netcp_core.c: In function 'netcp_txpipe_open':
      drivers/net/ethernet/ti/netcp_core.c:1349:21: error: 'DMA_MEM_TO_DEV' undeclared (first use in this function); did you mean 'DMA_MEMORY_MAP'?
        config.direction = DMA_MEM_TO_DEV;
                           ^~~~~~~~~~~~~~
                           DMA_MEMORY_MAP
      drivers/net/ethernet/ti/netcp_core.c:1349:21: note: each undeclared identifier is reported only once for each function it appears in
      drivers/net/ethernet/ti/netcp_core.c: In function 'netcp_setup_navigator_resources':
      drivers/net/ethernet/ti/netcp_core.c:1659:22: error: 'DMA_DEV_TO_MEM' undeclared (first use in this function); did you mean 'DMA_DESC_HOST'?
        config.direction  = DMA_DEV_TO_MEM;
      
      As the header is no longer included implicitly through netdevice.h,
      we should include it in the header that references the enum.
      
      Fixes: 0dd5759d ("net: remove dmaengine.h inclusion from netdevice.h")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2c08ab3f
    • Arnd Bergmann's avatar
      net/ncsi: fix ncsi_vlan_rx_{add,kill}_vid references · fd0c88b7
      Arnd Bergmann authored
      We get a new link error in allmodconfig kernels after ftgmac100
      started using the ncsi helpers:
      
      ERROR: "ncsi_vlan_rx_kill_vid" [drivers/net/ethernet/faraday/ftgmac100.ko] undefined!
      ERROR: "ncsi_vlan_rx_add_vid" [drivers/net/ethernet/faraday/ftgmac100.ko] undefined!
      
      Related to that, we get another error when CONFIG_NET_NCSI is disabled:
      
      drivers/net/ethernet/faraday/ftgmac100.c:1626:25: error: 'ncsi_vlan_rx_add_vid' undeclared here (not in a function); did you mean 'ncsi_start_dev'?
      drivers/net/ethernet/faraday/ftgmac100.c:1627:26: error: 'ncsi_vlan_rx_kill_vid' undeclared here (not in a function); did you mean 'ncsi_vlan_rx_add_vid'?
      
      This fixes both problems at once, using a 'static inline' stub helper
      for the disabled case, and exporting the functions when they are present.
      
      Fixes: 51564585 ("ftgmac100: Support NCSI VLAN filtering when available")
      Fixes: 21acf630 ("net/ncsi: Configure VLAN tag filter")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fd0c88b7
    • Eric Dumazet's avatar
      bpf: fix numa_node validation · 96e5ae4e
      Eric Dumazet authored
      syzkaller reported crashes in bpf map creation or map update [1]
      
      Problem is that nr_node_ids is a signed integer,
      NUMA_NO_NODE is also an integer, so it is very tempting
      to declare numa_node as a signed integer.
      
      This means the typical test to validate a user provided value :
      
              if (numa_node != NUMA_NO_NODE &&
                  (numa_node >= nr_node_ids ||
                   !node_online(numa_node)))
      
      must be written :
      
              if (numa_node != NUMA_NO_NODE &&
                  ((unsigned int)numa_node >= nr_node_ids ||
                   !node_online(numa_node)))
      
      [1]
      kernel BUG at mm/slab.c:3256!
      invalid opcode: 0000 [#1] SMP KASAN
      Dumping ftrace buffer:
         (ftrace buffer empty)
      Modules linked in:
      CPU: 0 PID: 2946 Comm: syzkaller916108 Not tainted 4.13.0-rc7+ #35
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      task: ffff8801d2bc60c0 task.stack: ffff8801c0c90000
      RIP: 0010:____cache_alloc_node+0x1d4/0x1e0 mm/slab.c:3292
      RSP: 0018:ffff8801c0c97638 EFLAGS: 00010096
      RAX: ffffffffffff8b7b RBX: 0000000001080220 RCX: 0000000000000000
      RDX: 00000000ffff8b7b RSI: 0000000001080220 RDI: ffff8801dac00040
      RBP: ffff8801c0c976c0 R08: 0000000000000000 R09: 0000000000000000
      R10: ffff8801c0c97620 R11: 0000000000000001 R12: ffff8801dac00040
      R13: ffff8801dac00040 R14: 0000000000000000 R15: 00000000ffff8b7b
      FS:  0000000002119940(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: 0000000020001fec CR3: 00000001d2980000 CR4: 00000000001406f0
      Call Trace:
       __do_kmalloc_node mm/slab.c:3688 [inline]
       __kmalloc_node+0x33/0x70 mm/slab.c:3696
       kmalloc_node include/linux/slab.h:535 [inline]
       alloc_htab_elem+0x2a8/0x480 kernel/bpf/hashtab.c:740
       htab_map_update_elem+0x740/0xb80 kernel/bpf/hashtab.c:820
       map_update_elem kernel/bpf/syscall.c:587 [inline]
       SYSC_bpf kernel/bpf/syscall.c:1468 [inline]
       SyS_bpf+0x20c5/0x4c40 kernel/bpf/syscall.c:1443
       entry_SYSCALL_64_fastpath+0x1f/0xbe
      RIP: 0033:0x440409
      RSP: 002b:00007ffd1f1792b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
      RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440409
      RDX: 0000000000000020 RSI: 0000000020006000 RDI: 0000000000000002
      RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401d70
      R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000
      Code: 83 c2 01 89 50 18 4c 03 70 08 e8 38 f4 ff ff 4d 85 f6 0f 85 3e ff ff ff 44 89 fe 4c 89 ef e8 94 fb ff ff 49 89 c6 e9 2b ff ff ff <0f> 0b 0f 0b 0f 0b 66 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41
      RIP: ____cache_alloc_node+0x1d4/0x1e0 mm/slab.c:3292 RSP: ffff8801c0c97638
      ---[ end trace d745f355da2e33ce ]---
      Kernel panic - not syncing: Fatal exception
      
      Fixes: 96eabe7a ("bpf: Allow selecting numa node during map creation")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Martin KaFai Lau <kafai@fb.com>
      Cc: Alexei Starovoitov <ast@fb.com>
      Cc: Daniel Borkmann <daniel@iogearbox.net>
      Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
      Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      96e5ae4e
  2. 04 Sep, 2017 25 commits