1. 08 Jun, 2015 15 commits
  2. 07 Jun, 2015 11 commits
    • Fugang Duan's avatar
      net: fec: ptp: correct the ENET_ATCOR value · 34270f5f
      Fugang Duan authored
      The current driver adjust freq formula is:
      fe * diff = ppb * pc
      Note:
        fe: ENET ref clock frequency in Hz
        diff = inc_corr - inc: difference between default increment and correction increment
        ppb: parts per billion adjustment from base
        pc: correction period (in number of fe clock cycles)
      
      The correction increment will be used after N cycles of regular increments,
      not every N cycles (with N being the correction period). For example, set ENET_ATCOR=4,
      INC=8, INC_CORR=9, there will be 4 increments of 8 (ENET_ATINC[INC]) , followed by 1
      increment of 9 (ENET_ATINC[INC_CORR]).
      
      So, the correct formula is:
      	fe * diff = ppb * (pc + 1)
      
      For ENET_ATCOR, a value 0 disables the correction counter and no corrections occur.
      So base on the origin formula, set pc = pc > 1 ? pc - 1 : pc.
      Signed-off-by: default avatarFugang Duan <[email protected]>
      Signed-off-by: default avatarFrank Li <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      34270f5f
    • Michal Simek's avatar
      net: ll_temac: Remove sparse warnings · 84ea0ded
      Michal Simek authored
      Remove sparse warnings:
      drivers/net/ethernet/xilinx/ll_temac_main.c:65:16: warning: cast removes
      address space of expression
      drivers/net/ethernet/xilinx/ll_temac_main.c:70:9: warning: cast removes
      address space of expression
      drivers/net/ethernet/xilinx/ll_temac_main.c:127:16: warning: cast
      removes address space of expression
      drivers/net/ethernet/xilinx/ll_temac_main.c:137:9: warning: cast removes
      address space of expression
      drivers/net/ethernet/xilinx/ll_temac_main.c:409:3: warning: symbol
      'temac_options' was not declared. Should it be static?
      drivers/net/ethernet/xilinx/ll_temac_main.c:590:6: warning: symbol
      'temac_adjust_link' was not declared. Should it be static?
      Signed-off-by: default avatarMichal Simek <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      84ea0ded
    • Eric Dumazet's avatar
      tcp: get_cookie_sock() consolidation · b80c0e78
      Eric Dumazet authored
      IPv4 and IPv6 share same implementation of get_cookie_sock(),
      and there is no point inlining it.
      
      We add tcp_ prefix to the common helper name and export it.
      Signed-off-by: default avatarEric Dumazet <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      b80c0e78
    • Florian Fainelli's avatar
      net: bcmgenet: improve TX timeout · 13ea6578
      Florian Fainelli authored
      Dump useful ring statistics along with interrupt status, software
      maintained pointers and hardware registers to help troubleshoot TX queue
      stalls.
      
      When a timeout occurs, disable TX NAPI for the rings, dump their states
      while interrupts are disabled, re-enable interrupts, NAPI and queue flow
      control to help with the recovery.
      Signed-off-by: default avatarFlorian Fainelli <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      13ea6578
    • Andrew Lunn's avatar
      net: dsa: mv88e6xxx: Fix deadlock by double lock · 80edb722
      Andrew Lunn authored
      ethtool -S on a DSA interface can deadlock for some switches because
      the same lock is taken twice. Use the register read function which
      expects the lock to be already held.
      Signed-off-by: default avatarAndrew Lunn <[email protected]>
      Fixes: 31888234 ("net: dsa: mv88e6xxx: Replace stats mutex with SMI mutex")
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      80edb722
    • Alexei Starovoitov's avatar
      bpf: allow programs to write to certain skb fields · d691f9e8
      Alexei Starovoitov authored
      allow programs read/write skb->mark, tc_index fields and
      ((struct qdisc_skb_cb *)cb)->data.
      
      mark and tc_index are generically useful in TC.
      cb[0]-cb[4] are primarily used to pass arguments from one
      program to another called via bpf_tail_call() which can
      be seen in sockex3_kern.c example.
      
      All fields of 'struct __sk_buff' are readable to socket and tc_cls_act progs.
      mark, tc_index are writeable from tc_cls_act only.
      cb[0]-cb[4] are writeable by both sockets and tc_cls_act.
      
      Add verifier tests and improve sample code.
      Signed-off-by: default avatarAlexei Starovoitov <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      d691f9e8
    • Alexei Starovoitov's avatar
      bpf: make programs see skb->data == L2 for ingress and egress · 3431205e
      Alexei Starovoitov authored
      eBPF programs attached to ingress and egress qdiscs see inconsistent skb->data.
      For ingress L2 header is already pulled, whereas for egress it's present.
      This is known to program writers which are currently forced to use
      BPF_LL_OFF workaround.
      Since programs don't change skb internal pointers it is safe to do
      pull/push right around invocation of the program and earlier taps and
      later pt->func() will not be affected.
      Multiple taps via packet_rcv(), tpacket_rcv() are doing the same trick
      around run_filter/BPF_PROG_RUN even if skb_shared.
      
      This fix finally allows programs to use optimized LD_ABS/IND instructions
      without BPF_LL_OFF for higher performance.
      tc ingress + cls_bpf + samples/bpf/tcbpf1_kern.o
             w/o JIT   w/JIT
      before  20.5     23.6 Mpps
      after   21.8     26.6 Mpps
      
      Old programs with BPF_LL_OFF will still work as-is.
      
      We can now undo most of the earlier workaround commit:
      a166151c ("bpf: fix bpf helpers to use skb->mac_header relative offsets")
      Signed-off-by: default avatarAlexei Starovoitov <[email protected]>
      Acked-by: default avatarJamal Hadi Salim <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      3431205e
    • Eric Dumazet's avatar
      tcp: remove redundant checks II · 98da81a4
      Eric Dumazet authored
      For same reasons than in commit 12e25e10 ("tcp: remove redundant
      checks"), we can remove redundant checks done for timewait sockets.
      Signed-off-by: default avatarEric Dumazet <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      98da81a4
    • Colin Ian King's avatar
      fddi: print an address with %p format specifier rather than %x · 908e80d6
      Colin Ian King authored
      The debug is printing the struct smt_header * address using
      the %x format specifier. Fix it to use %p instead.
      Signed-off-by: default avatarColin Ian King <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      908e80d6
    • Nicholas Mc Guire's avatar
      wan: dscc4: fix build warning Wunused-but-set-variable · c5726d26
      Nicholas Mc Guire authored
      Fix:
      drivers/net/wan/dscc4.c: In function 'dscc4_open':
      drivers/net/wan/dscc4.c:1049:25: warning: variable 'ppriv' set but not used
      [-Wunused-but-set-variable]
      
      This has been in there unused since 1da177e4 (Linux-2.6.12-rc2) simply
      remove it.
      Signed-off-by: default avatarNicholas Mc Guire <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      c5726d26
    • Eric Dumazet's avatar
      inet: add IP_BIND_ADDRESS_NO_PORT to overcome bind(0) limitations · 90c337da
      Eric Dumazet authored
      When an application needs to force a source IP on an active TCP socket
      it has to use bind(IP, port=x).
      
      As most applications do not want to deal with already used ports, x is
      often set to 0, meaning the kernel is in charge to find an available
      port.
      But kernel does not know yet if this socket is going to be a listener or
      be connected.
      It has very limited choices (no full knowledge of final 4-tuple for a
      connect())
      
      With limited ephemeral port range (about 32K ports), it is very easy to
      fill the space.
      
      This patch adds a new SOL_IP socket option, asking kernel to ignore
      the 0 port provided by application in bind(IP, port=0) and only
      remember the given IP address.
      
      The port will be automatically chosen at connect() time, in a way
      that allows sharing a source port as long as the 4-tuples are unique.
      
      This new feature is available for both IPv4 and IPv6 (Thanks Neal)
      
      Tested:
      
      Wrote a test program and checked its behavior on IPv4 and IPv6.
      
      strace(1) shows sequences of bind(IP=127.0.0.2, port=0) followed by
      connect().
      Also getsockname() show that the port is still 0 right after bind()
      but properly allocated after connect().
      
      socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 5
      setsockopt(5, SOL_IP, IP_BIND_ADDRESS_NO_PORT, [1], 4) = 0
      bind(5, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("127.0.0.2")}, 16) = 0
      getsockname(5, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("127.0.0.2")}, [16]) = 0
      connect(5, {sa_family=AF_INET, sin_port=htons(53174), sin_addr=inet_addr("127.0.0.3")}, 16) = 0
      getsockname(5, {sa_family=AF_INET, sin_port=htons(38050), sin_addr=inet_addr("127.0.0.2")}, [16]) = 0
      
      IPv6 test :
      
      socket(PF_INET6, SOCK_STREAM, IPPROTO_IP) = 7
      setsockopt(7, SOL_IP, IP_BIND_ADDRESS_NO_PORT, [1], 4) = 0
      bind(7, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
      getsockname(7, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, [28]) = 0
      connect(7, {sa_family=AF_INET6, sin6_port=htons(57300), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
      getsockname(7, {sa_family=AF_INET6, sin6_port=htons(60964), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, [28]) = 0
      
      I was able to bind()/connect() a million concurrent IPv4 sockets,
      instead of ~32000 before patch.
      
      lpaa23:~# ulimit -n 1000010
      lpaa23:~# ./bind --connect --num-flows=1000000 &
      1000000 sockets
      
      lpaa23:~# grep TCP /proc/net/sockstat
      TCP: inuse 2000063 orphan 0 tw 47 alloc 2000157 mem 66
      
      Check that a given source port is indeed used by many different
      connections :
      
      lpaa23:~# ss -t src :40000 | head -10
      State      Recv-Q Send-Q   Local Address:Port          Peer Address:Port
      ESTAB      0      0           127.0.0.2:40000         127.0.202.33:44983
      ESTAB      0      0           127.0.0.2:40000         127.2.27.240:44983
      ESTAB      0      0           127.0.0.2:40000           127.2.98.5:44983
      ESTAB      0      0           127.0.0.2:40000        127.0.124.196:44983
      ESTAB      0      0           127.0.0.2:40000         127.2.139.38:44983
      ESTAB      0      0           127.0.0.2:40000          127.1.59.80:44983
      ESTAB      0      0           127.0.0.2:40000          127.3.6.228:44983
      ESTAB      0      0           127.0.0.2:40000          127.0.38.53:44983
      ESTAB      0      0           127.0.0.2:40000         127.1.197.10:44983
      Signed-off-by: default avatarEric Dumazet <[email protected]>
      Signed-off-by: default avatarDavid S. Miller <[email protected]>
      90c337da
  3. 06 Jun, 2015 8 commits
  4. 04 Jun, 2015 6 commits