Eric Lee / smarc-fsl-linux-kernel

16 Sep, 2011

1 commit

  • 946cedccb   tcp: Change possible SYN flooding messages ... Browse Code »

    "Possible SYN flooding on port xxxx " messages can fill logs on servers.

    Change logic to log the message only once per listener, and add two new
    SNMP counters to track :

    TCPReqQFullDoCookies : number of times a SYNCOOKIE was replied to client

    TCPReqQFullDrop : number of times a SYN request was dropped because
    syncookies were not enabled.

    Based on a prior patch from Tom Herbert, and suggestions from David.

    Signed-off-by: Eric Dumazet
    CC: Tom Herbert
    Signed-off-by: David S. Miller

    Eric Dumazet
     

09 Dec, 2010

1 commit

03 Jun, 2010

1 commit

  • b5f7e7554   ipv4: add LINUX_MIB_IPRPFILTER snmp counter ... Browse Code »

    Christoph Lameter mentioned that packets could be dropped in input path
    because of rp_filter settings, without any SNMP counter being
    incremented. System administrator can have a hard time to track the
    problem.

    This patch introduces a new counter, LINUX_MIB_IPRPFILTER, incremented
    each time we drop a packet because Reverse Path Filter triggers.

    (We receive an IPv4 datagram on a given interface, and find the route to
    send an answer would use another interface)

    netstat -s | grep IPReversePathFilter
    IPReversePathFilter: 21714

    Reported-by: Christoph Lameter
    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

04 Apr, 2010

1 commit

  • 1f8438a85   icmp: Account for ICMP out errors ... Browse Code »

    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: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

22 Mar, 2010

1 commit

  • 907cdda52   tcp: Add SNMP counter for DEFER_ACCEPT ... Browse Code »

    Its currently hard to diagnose when ACK frames are dropped because an
    application set TCP_DEFER_ACCEPT on its listening socket.

    See http://bugzilla.kernel.org/show_bug.cgi?id=15507

    This patch adds a SNMP value, named TCPDeferAcceptDrop

    netstat -s | grep TCPDeferAcceptDrop
    TCPDeferAcceptDrop: 0

    This counter is incremented every time we drop a pure ACK frame received
    by a socket in SYN_RECV state because its SYNACK retrans count is lower
    than defer_accept value.

    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

09 Mar, 2010

1 commit

  • 6cce09f87   tcp: Add SNMP counters for backlog and min_ttl drops ... Browse Code »

    Commit 6b03a53a (tcp: use limited socket backlog) added the possibility
    of dropping frames when backlog queue is full.

    Commit d218d111 (tcp: Generalized TTL Security Mechanism) added the
    possibility of dropping frames when TTL is under a given limit.

    This patch adds new SNMP MIB entries, named TCPBacklogDrop and
    TCPMinTTLDrop, published in /proc/net/netstat in TcpExt: line

    netstat -s | egrep "TCPBacklogDrop|TCPMinTTLDrop"
    TCPBacklogDrop: 0
    TCPMinTTLDrop: 0

    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

19 Feb, 2010

1 commit

27 Apr, 2009

1 commit

  • edf391ff1   snmp: add missing counters for RFC 4293 ... Browse Code »

    The IP MIB (RFC 4293) defines stats for InOctets, OutOctets, InMcastOctets and
    OutMcastOctets:
    http://tools.ietf.org/html/rfc4293
    But it seems we don't track those in any way that easy to separate from other
    protocols. This patch adds those missing counters to the stats file. Tested
    successfully by me

    With help from Eric Dumazet.

    Signed-off-by: Neil Horman
    Signed-off-by: David S. Miller

    Neil Horman
     

25 Nov, 2008

1 commit

30 Jul, 2008

1 commit

01 Feb, 2008

1 commit

  • 9472c9ef6   [XFRM]: Fix statistics. ... Browse Code »

    o Outbound sequence number overflow error status
    is counted as XfrmOutStateSeqError.
    o Additionaly, it changes inbound sequence number replay
    error name from XfrmInSeqOutOfWindow to XfrmInStateSeqError
    to apply name scheme above.
    o Inbound IPv4 UDP encapsuling type mismatch error is wrongly
    mapped to XfrmInStateInvalid then this patch fiex the error
    to XfrmInStateMismatch.

    Signed-off-by: Masahide NAKAMURA
    Signed-off-by: David S. Miller

    Masahide NAKAMURA
     

29 Jan, 2008

1 commit

  • 558f82ef6   [XFRM]: Define packet dropping statistics. ... Browse Code »

    This statistics is shown factor dropped by transformation
    at /proc/net/xfrm_stat for developer.
    It is a counter designed from current transformation source code
    and defined as linux private MIB.

    See Documentation/networking/xfrm_proc.txt for the detail.

    Signed-off-by: Masahide NAKAMURA
    Signed-off-by: David S. Miller

    Masahide NAKAMURA
     

11 Oct, 2007

4 commits

  • 912d8f0b1   [TCP] MIB: Count FRTO's successfully detected spurious RTOs ... Browse Code »

    Signed-off-by: Ilpo Järvinen
    Signed-off-by: David S. Miller

    Ilpo Järvinen
     
  • 96793b482   [IPV4]: Add ICMPMsgStats MIB (RFC 4293) ... Browse Code »

    Background: RFC 4293 deprecates existing individual, named ICMP
    type counters to be replaced with the ICMPMsgStatsTable. This table
    includes entries for both IPv4 and IPv6, and requires counting of all
    ICMP types, whether or not the machine implements the type.

    These patches "remove" (but not really) the existing counters, and
    replace them with the ICMPMsgStats tables for v4 and v6.
    It includes the named counters in the /proc places they were, but gets the
    values for them from the new tables. It also counts packets generated
    from raw socket output (e.g., OutEchoes, MLD queries, RA's from
    radvd, etc).

    Changes:
    1) create icmpmsg_statistics mib
    2) create icmpv6msg_statistics mib
    3) modify existing counters to use these
    4) modify /proc/net/snmp to add "IcmpMsg" with all ICMP types
    listed by number for easy SNMP parsing
    5) modify /proc/net/snmp printing for "Icmp" to get the named data
    from new counters.

    Signed-off-by: David L Stevens
    Signed-off-by: David S. Miller

    David L Stevens
     
  • 14878f75a   [IPV6]: Add ICMPMsgStats MIB (RFC 4293) [rev 2] ... Browse Code »

    Background: RFC 4293 deprecates existing individual, named ICMP
    type counters to be replaced with the ICMPMsgStatsTable. This table
    includes entries for both IPv4 and IPv6, and requires counting of all
    ICMP types, whether or not the machine implements the type.

    These patches "remove" (but not really) the existing counters, and
    replace them with the ICMPMsgStats tables for v4 and v6.
    It includes the named counters in the /proc places they were, but gets the
    values for them from the new tables. It also counts packets generated
    from raw socket output (e.g., OutEchoes, MLD queries, RA's from
    radvd, etc).

    Changes:
    1) create icmpmsg_statistics mib
    2) create icmpv6msg_statistics mib
    3) modify existing counters to use these
    4) modify /proc/net/snmp to add "IcmpMsg" with all ICMP types
    listed by number for easy SNMP parsing
    5) modify /proc/net/snmp printing for "Icmp" to get the named data
    from new counters.
    [new to 2nd revision]
    6) support per-interface ICMP stats
    7) use common macro for per-device stat macros

    Signed-off-by: David L Stevens
    Signed-off-by: David S. Miller

    David L Stevens
     
  • 18f02545a   [TCP] MIB: Add counters for discarded SACK blocks ... Browse Code »

    In DSACK case, some events are not extraordinary, such as packet
    duplication generated DSACK. They can arrive easily below
    snd_una when undo_marker is not set (TCP being in CA_Open),
    counting such DSACKs amoung SACK discards will likely just
    mislead if they occur in some scenario when there are other
    problems as well. Similarly, excessively delayed packets could
    cause "normal" DSACKs. Therefore, separate counters are
    allocated for DSACK events.

    Signed-off-by: Ilpo Järvinen
    Signed-off-by: David S. Miller

    Ilpo Järvinen
     

30 Apr, 2007

1 commit

23 Sep, 2006

2 commits

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds