1. 30 Oct, 2010 1 commit
  2. 30 Jun, 2010 1 commit
    • Eric Dumazet's avatar
      snmp: 64bit ipstats_mib for all arches · 4ce3c183
      Eric Dumazet authored
      
      
      /proc/net/snmp and /proc/net/netstat expose SNMP counters.
      
      Width of these counters is either 32 or 64 bits, depending on the size
      of "unsigned long" in kernel.
      
      This means user program parsing these files must already be prepared to
      deal with 64bit values, regardless of user program being 32 or 64 bit.
      
      This patch introduces 64bit snmp values for IPSTAT mib, where some
      counters can wrap pretty fast if they are 32bit wide.
      
      # netstat -s|egrep "InOctets|OutOctets"
          InOctets: 244068329096
          OutOctets: 244069348848
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4ce3c183
  3. 18 May, 2010 1 commit
  4. 03 Apr, 2010 1 commit
    • Eric Dumazet's avatar
      icmp: Account for ICMP out errors · 1f8438a8
      Eric Dumazet authored
      
      
      When ip_append() fails because of socket limit or memory shortage,
      increment ICMP_MIB_OUTERRORS counter, so that "netstat -s" can report
      these errors.
      
      LANG=C netstat -s | grep "ICMP messages failed"
          0 ICMP messages failed
      
      For IPV6, implement ICMP6_MIB_OUTERRORS counter as well.
      
      # grep Icmp6OutErrors /proc/net/dev_snmp6/*
      /proc/net/dev_snmp6/eth0:Icmp6OutErrors                   	0
      /proc/net/dev_snmp6/lo:Icmp6OutErrors                   	0
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1f8438a8
  5. 17 Feb, 2010 1 commit
    • Tejun Heo's avatar
      percpu: add __percpu sparse annotations to net · 7d720c3e
      Tejun Heo authored
      
      
      Add __percpu sparse annotations to net.
      
      These annotations are to make sparse consider percpu variables to be
      in a different address space and warn if accessed without going
      through percpu accessors.  This patch doesn't affect normal builds.
      
      The macro and type tricks around snmp stats make things a bit
      interesting.  DEFINE/DECLARE_SNMP_STAT() macros mark the target field
      as __percpu and SNMP_UPD_PO_STATS() macro is updated accordingly.  All
      snmp_mib_*() users which used to cast the argument to (void **) are
      updated to cast it to (void __percpu **).
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
      Cc: Patrick McHardy <kaber@trash.net>
      Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
      Cc: Vlad Yasevich <vladislav.yasevich@hp.com>
      Cc: netdev@vger.kernel.org
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7d720c3e
  6. 23 Jan, 2010 1 commit
  7. 17 Jan, 2010 1 commit
  8. 10 Jan, 2010 1 commit
    • Jiri Slaby's avatar
      NET: ipv6, remove unnecessary check · c3f6c21d
      Jiri Slaby authored
      
      
      Stanse found a potential null dereference in snmp6_unregister_dev.
      There is a check for idev being NULL, but it is dereferenced
      earlier. But idev cannot be NULL when passed to
      snmp6_unregister_dev, so remove the test.
      Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
      Cc: "Pekka Savola (ipv6)" <pekkas@netcore.fi>
      Cc: James Morris <jmorris@namei.org>
      Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
      Cc: Patrick McHardy <kaber@trash.net>
      Cc: netdev@vger.kernel.org
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c3f6c21d
  9. 05 Aug, 2009 1 commit
  10. 27 Apr, 2009 1 commit
  11. 20 Nov, 2008 1 commit
  12. 08 Oct, 2008 1 commit
  13. 07 Oct, 2008 8 commits
  14. 30 Jul, 2008 1 commit
  15. 19 Jul, 2008 1 commit
  16. 18 Jul, 2008 2 commits
  17. 11 Jun, 2008 1 commit
  18. 02 May, 2008 1 commit
  19. 31 Mar, 2008 3 commits
  20. 25 Mar, 2008 1 commit
  21. 06 Mar, 2008 1 commit
    • David S. Miller's avatar
      [UDP]: Revert udplite and code split. · db8dac20
      David S. Miller authored
      This reverts commit db1ed684 ("[IPV6]
      UDP: Rename IPv6 UDP files."), commit
      8be8af8f ("[IPV4] UDP: Move
      IPv4-specific bits to other file.") and commit
      e898d4db
      
       ("[UDP]: Allow users to
      configure UDP-Lite.").
      
      First, udplite is of such small cost, and it is a core protocol just
      like TCP and normal UDP are.
      
      We spent enormous amounts of effort to make udplite share as much code
      with core UDP as possible.  All of that work is less valuable if we're
      just going to slap a config option on udplite support.
      
      It is also causing build failures, as reported on linux-next, showing
      that the changeset was not tested very well.  In fact, this is the
      second build failure resulting from the udplite change.
      
      Finally, the config options provided was a bool, instead of a modular
      option.  Meaning the udplite code does not even get build tested
      by allmodconfig builds, and furthermore the user is not presented
      with a reasonable modular build option which is particularly needed
      by distribution vendors.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      db8dac20
  22. 05 Mar, 2008 1 commit
  23. 03 Mar, 2008 1 commit
    • YOSHIFUJI Hideaki's avatar
      [UDP]: Allow users to configure UDP-Lite. · e898d4db
      YOSHIFUJI Hideaki authored
      
      
      Let's give users an option for disabling UDP-Lite (~4K).
      
      old:
      |    text	   data	    bss	    dec	    hex	filename
      |  286498	  12432	   6072	 305002	  4a76a	net/ipv4/built-in.o
      |  193830	   8192	   3204	 205226	  321aa	net/ipv6/ipv6.o
      
      new (without UDP-Lite):
      |    text	   data	    bss	    dec	    hex	filename
      |  284086	  12136	   5432	 301654	  49a56	net/ipv4/built-in.o
      |  191835	   7832	   3076	 202743	  317f7	net/ipv6/ipv6.o
      Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
      e898d4db
  24. 28 Feb, 2008 1 commit
  25. 28 Jan, 2008 4 commits
  26. 21 Jan, 2008 1 commit
  27. 07 Nov, 2007 1 commit
    • Eric Dumazet's avatar
      [NET]: Define infrastructure to keep 'inuse' changes in an efficent SMP/NUMA way. · 286ab3d4
      Eric Dumazet authored
      
      
      "struct proto" currently uses an array stats[NR_CPUS] to track change on
      'inuse' sockets per protocol.
      
      If NR_CPUS is big, this means we use a big memory area for this.
      Moreover, all this memory area is located on a single node on NUMA
      machines, increasing memory pressure on the boot node.
      
      In this patch, I tried to :
      
      - Keep a fast !CONFIG_SMP implementation
      - Keep a fast CONFIG_SMP implementation for often used protocols
      (tcp,udp,raw,...)
      - Introduce a NUMA efficient implementation
      
      Some helper macros are defined in include/net/sock.h
      These macros take into account CONFIG_SMP
      
      If a "struct proto" is declared without using DEFINE_PROTO_INUSE /
      REF_PROTO_INUSE
      macros, it will automatically use a default implementation, using a
      dynamically allocated percpu zone.
      This default implementation will be NUMA efficient, but might use 32/64
      bytes per possible cpu
      because of current alloc_percpu() implementation.
      However it still should be better than previous implementation based on
      stats[NR_CPUS] field.
      
      When a "struct proto" is changed to use the new macros, we use a single
      static "int" percpu variable,
      lowering the memory and cpu costs, still preserving NUMA efficiency.
      Signed-off-by: default avatarEric Dumazet <dada1@cosmosbay.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      286ab3d4