1. 14 Aug, 2019 4 commits
  2. 12 Aug, 2019 8 commits
    • André Draszik's avatar
      net: phy: at803x: stop switching phy delay config needlessly · bb0ce4c1
      André Draszik authored
      This driver does a funny dance disabling and re-enabling
      RX and/or TX delays. In any of the RGMII-ID modes, it first
      disables the delays, just to re-enable them again right
      away. This looks like a needless exercise.
      
      Just enable the respective delays when in any of the
      relevant 'id' modes, and disable them otherwise.
      
      Also, remove comments which don't add anything that can't be
      seen by looking at the code.
      Signed-off-by: default avatarAndré Draszik <git@andred.net>
      CC: Andrew Lunn <andrew@lunn.ch>
      CC: Florian Fainelli <f.fainelli@gmail.com>
      CC: Heiner Kallweit <hkallweit1@gmail.com>
      CC: "David S. Miller" <davem@davemloft.net>
      CC: netdev@vger.kernel.org
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bb0ce4c1
    • Nathan Chancellor's avatar
      net: tc35815: Explicitly check NET_IP_ALIGN is not zero in tc35815_rx · 125b7e09
      Nathan Chancellor authored
      clang warns:
      
      drivers/net/ethernet/toshiba/tc35815.c:1507:30: warning: use of logical
      '&&' with constant operand [-Wconstant-logical-operand]
                              if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
                                                        ^  ~~~~~~~~~~~~
      drivers/net/ethernet/toshiba/tc35815.c:1507:30: note: use '&' for a
      bitwise operation
                              if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
                                                        ^~
                                                        &
      drivers/net/ethernet/toshiba/tc35815.c:1507:30: note: remove constant to
      silence this warning
                              if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
                                                       ~^~~~~~~~~~~~~~~
      1 warning generated.
      
      Explicitly check that NET_IP_ALIGN is not zero, which matches how this
      is checked in other parts of the tree. Because NET_IP_ALIGN is a build
      time constant, this check will be constant folded away during
      optimization.
      
      Fixes: 82a9928d ("tc35815: Enable StripCRC feature")
      Link: https://github.com/ClangBuiltLinux/linux/issues/608Signed-off-by: default avatarNathan Chancellor <natechancellor@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      125b7e09
    • Chris Packham's avatar
      tipc: initialise addr_trail_end when setting node addresses · 8874ecae
      Chris Packham authored
      We set the field 'addr_trial_end' to 'jiffies', instead of the current
      value 0, at the moment the node address is initialized. This guarantees
      we don't inadvertently enter an address trial period when the node
      address is explicitly set by the user.
      Signed-off-by: default avatarChris Packham <chris.packham@alliedtelesis.co.nz>
      Acked-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8874ecae
    • Chen-Yu Tsai's avatar
      net: dsa: Check existence of .port_mdb_add callback before calling it · 58799865
      Chen-Yu Tsai authored
      The dsa framework has optional .port_mdb_{prepare,add,del} callback fields
      for drivers to handle multicast database entries. When adding an entry, the
      framework goes through a prepare phase, then a commit phase. Drivers not
      providing these callbacks should be detected in the prepare phase.
      
      DSA core may still bypass the bridge layer and call the dsa_port_mdb_add
      function directly with no prepare phase or no switchdev trans object,
      and the framework ends up calling an undefined .port_mdb_add callback.
      This results in a NULL pointer dereference, as shown in the log below.
      
      The other functions seem to be properly guarded. Do the same for
      .port_mdb_add in dsa_switch_mdb_add_bitmap() as well.
      
          8<--- cut here ---
          Unable to handle kernel NULL pointer dereference at virtual address 00000000
          pgd = (ptrval)
          [00000000] *pgd=00000000
          Internal error: Oops: 80000005 [#1] SMP ARM
          Modules linked in: rtl8xxxu rtl8192cu rtl_usb rtl8192c_common rtlwifi mac80211 cfg80211
          CPU: 1 PID: 134 Comm: kworker/1:2 Not tainted 5.3.0-rc1-00247-gd3519030752a #1
          Hardware name: Allwinner sun7i (A20) Family
          Workqueue: events switchdev_deferred_process_work
          PC is at 0x0
          LR is at dsa_switch_event+0x570/0x620
          pc : [<00000000>]    lr : [<c08533ec>]    psr: 80070013
          sp : ee871db8  ip : 00000000  fp : ee98d0a4
          r10: 0000000c  r9 : 00000008  r8 : ee89f710
          r7 : ee98d040  r6 : ee98d088  r5 : c0f04c48  r4 : ee98d04c
          r3 : 00000000  r2 : ee89f710  r1 : 00000008  r0 : ee98d040
          Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
          Control: 10c5387d  Table: 6deb406a  DAC: 00000051
          Process kworker/1:2 (pid: 134, stack limit = 0x(ptrval))
          Stack: (0xee871db8 to 0xee872000)
          1da0:                                                       ee871e14 103ace2d
          1dc0: 00000000 ffffffff 00000000 ee871e14 00000005 00000000 c08524a0 00000000
          1de0: ffffe000 c014bdfc c0f04c48 ee871e98 c0f04c48 ee9e5000 c0851120 c014bef0
          1e00: 00000000 b643aea2 ee9b4068 c08509a8 ee2bf940 ee89f710 ee871ecb 00000000
          1e20: 00000008 103ace2d 00000000 c087e248 ee29c868 103ace2d 00000001 ffffffff
          1e40: 00000000 ee871e98 00000006 00000000 c0fb2a50 c087e2d0 ffffffff c08523c4
          1e60: ffffffff c014bdfc 00000006 c0fad2d0 ee871e98 ee89f710 00000000 c014c500
          1e80: 00000000 ee89f3c0 c0f04c48 00000000 ee9e5000 c087dfb4 ee9e5000 00000000
          1ea0: ee89f710 ee871ecb 00000001 103ace2d 00000000 c0f04c48 00000000 c087e0a8
          1ec0: 00000000 efd9a3e0 0089f3c0 103ace2d ee89f700 ee89f710 ee9e5000 00000122
          1ee0: 00000100 c087e130 ee89f700 c0fad2c8 c1003ef0 c087de4c 2e928000 c0fad2ec
          1f00: c0fad2ec ee839580 ef7a62c0 ef7a9400 00000000 c087def8 c0fad2ec c01447dc
          1f20: ef315640 ef7a62c0 00000008 ee839580 ee839594 ef7a62c0 00000008 c0f03d00
          1f40: ef7a62d8 ef7a62c0 ffffe000 c0145b84 ffffe000 c0fb2420 c0bfaa8c 00000000
          1f60: ffffe000 ee84b600 ee84b5c0 00000000 ee870000 ee839580 c0145b40 ef0e5ea4
          1f80: ee84b61c c014a6f8 00000001 ee84b5c0 c014a5b0 00000000 00000000 00000000
          1fa0: 00000000 00000000 00000000 c01010e8 00000000 00000000 00000000 00000000
          1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
          1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
          [<c08533ec>] (dsa_switch_event) from [<c014bdfc>] (notifier_call_chain+0x48/0x84)
          [<c014bdfc>] (notifier_call_chain) from [<c014bef0>] (raw_notifier_call_chain+0x18/0x20)
          [<c014bef0>] (raw_notifier_call_chain) from [<c08509a8>] (dsa_port_mdb_add+0x48/0x74)
          [<c08509a8>] (dsa_port_mdb_add) from [<c087e248>] (__switchdev_handle_port_obj_add+0x54/0xd4)
          [<c087e248>] (__switchdev_handle_port_obj_add) from [<c087e2d0>] (switchdev_handle_port_obj_add+0x8/0x14)
          [<c087e2d0>] (switchdev_handle_port_obj_add) from [<c08523c4>] (dsa_slave_switchdev_blocking_event+0x94/0xa4)
          [<c08523c4>] (dsa_slave_switchdev_blocking_event) from [<c014bdfc>] (notifier_call_chain+0x48/0x84)
          [<c014bdfc>] (notifier_call_chain) from [<c014c500>] (blocking_notifier_call_chain+0x50/0x68)
          [<c014c500>] (blocking_notifier_call_chain) from [<c087dfb4>] (switchdev_port_obj_notify+0x44/0xa8)
          [<c087dfb4>] (switchdev_port_obj_notify) from [<c087e0a8>] (switchdev_port_obj_add_now+0x90/0x104)
          [<c087e0a8>] (switchdev_port_obj_add_now) from [<c087e130>] (switchdev_port_obj_add_deferred+0x14/0x5c)
          [<c087e130>] (switchdev_port_obj_add_deferred) from [<c087de4c>] (switchdev_deferred_process+0x64/0x104)
          [<c087de4c>] (switchdev_deferred_process) from [<c087def8>] (switchdev_deferred_process_work+0xc/0x14)
          [<c087def8>] (switchdev_deferred_process_work) from [<c01447dc>] (process_one_work+0x218/0x50c)
          [<c01447dc>] (process_one_work) from [<c0145b84>] (worker_thread+0x44/0x5bc)
          [<c0145b84>] (worker_thread) from [<c014a6f8>] (kthread+0x148/0x150)
          [<c014a6f8>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
          Exception stack(0xee871fb0 to 0xee871ff8)
          1fa0:                                     00000000 00000000 00000000 00000000
          1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
          1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
          Code: bad PC value
          ---[ end trace 1292c61abd17b130 ]---
      
          [<c08533ec>] (dsa_switch_event) from [<c014bdfc>] (notifier_call_chain+0x48/0x84)
          corresponds to
      
      	$ arm-linux-gnueabihf-addr2line -C -i -e vmlinux c08533ec
      
      	linux/net/dsa/switch.c:156
      	linux/net/dsa/switch.c:178
      	linux/net/dsa/switch.c:328
      
      Fixes: e6db98db ("net: dsa: add switch mdb bitmap functions")
      Signed-off-by: default avatarChen-Yu Tsai <wens@csie.org>
      Reviewed-by: default avatarVivien Didelot <vivien.didelot@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      58799865
    • Petr Machata's avatar
      mlxsw: spectrum_ptp: Keep unmatched entries in a linked list · 8028ccda
      Petr Machata authored
      To identify timestamps for matching with their packets, Spectrum-1 uses a
      five-tuple of (port, direction, domain number, message type, sequence ID).
      If there are several clients from the same domain behind a single port
      sending Delay_Req's, the only thing differentiating these packets, as far
      as Spectrum-1 is concerned, is the sequence ID. Should sequence IDs between
      individual clients be similar, conflicts may arise. That is not a problem
      to hardware, which will simply deliver timestamps on a first comes, first
      served basis.
      
      However the driver uses a simple hash table to store the unmatched pieces.
      When a new conflicting piece arrives, it pushes out the previously stored
      one, which if it is a packet, is delivered without timestamp. Later on as
      the corresponding timestamps arrive, the first one is mismatched to the
      second packet, and the second one is never matched and eventually is GCd.
      
      To correct this issue, instead of using a simple rhashtable, use rhltable
      to keep the unmatched entries.
      
      Previously, a found unmatched entry would always be removed from the hash
      table. That is not the case anymore--an incompatible entry is left in the
      hash table. Therefore removal from the hash table cannot be used to confirm
      the validity of the looked-up pointer, instead the lookup would simply need
      to be redone. Therefore move it inside the critical section. This
      simplifies a lot of the code.
      
      Fixes: 87486427 ("mlxsw: spectrum: PTP: Support SIOCGHWTSTAMP, SIOCSHWTSTAMP ioctls")
      Reported-by: default avatarAlex Veber <alexve@mellanox.com>
      Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8028ccda
    • Jonathan Neuschäfer's avatar
      net: nps_enet: Fix function names in doc comments · d81f4141
      Jonathan Neuschäfer authored
      Adjust the function names in two doc comments to match the corresponding
      functions.
      Signed-off-by: default avatarJonathan Neuschäfer <j.neuschaefer@gmx.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d81f4141
    • David Howells's avatar
      rxrpc: Fix local refcounting · 68553f1a
      David Howells authored
      Fix rxrpc_unuse_local() to handle a NULL local pointer as it can be called
      on an unbound socket on which rx->local is not yet set.
      
      The following reproduced (includes omitted):
      
      	int main(void)
      	{
      		socket(AF_RXRPC, SOCK_DGRAM, AF_INET);
      		return 0;
      	}
      
      causes the following oops to occur:
      
      	BUG: kernel NULL pointer dereference, address: 0000000000000010
      	...
      	RIP: 0010:rxrpc_unuse_local+0x8/0x1b
      	...
      	Call Trace:
      	 rxrpc_release+0x2b5/0x338
      	 __sock_release+0x37/0xa1
      	 sock_close+0x14/0x17
      	 __fput+0x115/0x1e9
      	 task_work_run+0x72/0x98
      	 do_exit+0x51b/0xa7a
      	 ? __context_tracking_exit+0x4e/0x10e
      	 do_group_exit+0xab/0xab
      	 __x64_sys_exit_group+0x14/0x17
      	 do_syscall_64+0x89/0x1d4
      	 entry_SYSCALL_64_after_hwframe+0x49/0xbe
      
      Reported-by: syzbot+20dee719a2e090427b5f@syzkaller.appspotmail.com
      Fixes: 730c5fd4 ("rxrpc: Fix local endpoint refcounting")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      cc: Jeffrey Altman <jaltman@auristor.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      68553f1a
    • David Ahern's avatar
      netdevsim: Restore per-network namespace accounting for fib entries · 59c84b9f
      David Ahern authored
      Prior to the commit in the fixes tag, the resource controller in netdevsim
      tracked fib entries and rules per network namespace. Restore that behavior.
      
      Fixes: 5fc49422 ("netdevsim: create devlink instance per netdevsim instance")
      Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      59c84b9f
  3. 11 Aug, 2019 1 commit
    • David S. Miller's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf · 9481382b
      David S. Miller authored
      Daniel Borkmann says:
      
      ====================
      pull-request: bpf 2019-08-11
      
      The following pull-request contains BPF updates for your *net* tree.
      
      The main changes are:
      
      1) x64 JIT code generation fix for backward-jumps to 1st insn, from Alexei.
      
      2) Fix buggy multi-closing of BTF file descriptor in libbpf, from Andrii.
      
      3) Fix libbpf_num_possible_cpus() to make it thread safe, from Takshak.
      
      4) Fix bpftool to dump an error if pinning fails, from Jakub.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9481382b
  4. 10 Aug, 2019 1 commit
  5. 09 Aug, 2019 24 commits
  6. 08 Aug, 2019 2 commits
    • Guillaume Nault's avatar
      inet: frags: re-introduce skb coalescing for local delivery · 891584f4
      Guillaume Nault authored
      Before commit d4289fcc ("net: IP6 defrag: use rbtrees for IPv6
      defrag"), a netperf UDP_STREAM test[0] using big IPv6 datagrams (thus
      generating many fragments) and running over an IPsec tunnel, reported
      more than 6Gbps throughput. After that patch, the same test gets only
      9Mbps when receiving on a be2net nic (driver can make a big difference
      here, for example, ixgbe doesn't seem to be affected).
      
      By reusing the IPv4 defragmentation code, IPv6 lost fragment coalescing
      (IPv4 fragment coalescing was dropped by commit 14fe22e3 ("Revert
      "ipv4: use skb coalescing in defragmentation"")).
      
      Without fragment coalescing, be2net runs out of Rx ring entries and
      starts to drop frames (ethtool reports rx_drops_no_frags errors). Since
      the netperf traffic is only composed of UDP fragments, any lost packet
      prevents reassembly of the full datagram. Therefore, fragments which
      have no possibility to ever get reassembled pile up in the reassembly
      queue, until the memory accounting exeeds the threshold. At that point
      no fragment is accepted anymore, which effectively discards all
      netperf traffic.
      
      When reassembly timeout expires, some stale fragments are removed from
      the reassembly queue, so a few packets can be received, reassembled
      and delivered to the netperf receiver. But the nic still drops frames
      and soon the reassembly queue gets filled again with stale fragments.
      These long time frames where no datagram can be received explain why
      the performance drop is so significant.
      
      Re-introducing fragment coalescing is enough to get the initial
      performances again (6.6Gbps with be2net): driver doesn't drop frames
      anymore (no more rx_drops_no_frags errors) and the reassembly engine
      works at full speed.
      
      This patch is quite conservative and only coalesces skbs for local
      IPv4 and IPv6 delivery (in order to avoid changing skb geometry when
      forwarding). Coalescing could be extended in the future if need be, as
      more scenarios would probably benefit from it.
      
      [0]: Test configuration
      Sender:
      ip xfrm policy flush
      ip xfrm state flush
      ip xfrm state add src fc00:1::1 dst fc00:2::1 proto esp spi 0x1000 aead 'rfc4106(gcm(aes))' 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b 96 mode transport sel src fc00:1::1 dst fc00:2::1
      ip xfrm policy add src fc00:1::1 dst fc00:2::1 dir in tmpl src fc00:1::1 dst fc00:2::1 proto esp mode transport action allow
      ip xfrm state add src fc00:2::1 dst fc00:1::1 proto esp spi 0x1001 aead 'rfc4106(gcm(aes))' 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b 96 mode transport sel src fc00:2::1 dst fc00:1::1
      ip xfrm policy add src fc00:2::1 dst fc00:1::1 dir out tmpl src fc00:2::1 dst fc00:1::1 proto esp mode transport action allow
      netserver -D -L fc00:2::1
      
      Receiver:
      ip xfrm policy flush
      ip xfrm state flush
      ip xfrm state add src fc00:2::1 dst fc00:1::1 proto esp spi 0x1001 aead 'rfc4106(gcm(aes))' 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b 96 mode transport sel src fc00:2::1 dst fc00:1::1
      ip xfrm policy add src fc00:2::1 dst fc00:1::1 dir in tmpl src fc00:2::1 dst fc00:1::1 proto esp mode transport action allow
      ip xfrm state add src fc00:1::1 dst fc00:2::1 proto esp spi 0x1000 aead 'rfc4106(gcm(aes))' 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b 96 mode transport sel src fc00:1::1 dst fc00:2::1
      ip xfrm policy add src fc00:1::1 dst fc00:2::1 dir out tmpl src fc00:1::1 dst fc00:2::1 proto esp mode transport action allow
      netperf -H fc00:2::1 -f k -P 0 -L fc00:1::1 -l 60 -t UDP_STREAM -I 99,5 -i 5,5 -T5,5 -6
      Signed-off-by: default avatarGuillaume Nault <gnault@redhat.com>
      Acked-by: default avatarFlorian Westphal <fw@strlen.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      891584f4
    • Aya Levin's avatar
      net/mlx5e: Remove redundant check in CQE recovery flow of tx reporter · a4e508ca
      Aya Levin authored
      Remove check of recovery bit, in the beginning of the CQE recovery
      function. This test is already performed right before the reporter
      is invoked, when CQE error is detected.
      
      Fixes: de8650a8 ("net/mlx5e: Add tx reporter support")
      Signed-off-by: default avatarAya Levin <ayal@mellanox.com>
      Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
      a4e508ca