Merge remote-tracking branch 'usb/usb-next'

[karo-tx-linux.git] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 10742902146fc1da3ae1c84a94929b42a79e29d0..a46d78583ae1d9b1a8b49b96066f423f4b29d037 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -440,6 +440,10 @@ tcp_syncookies - BOOLEAN
        SYN flood warnings in logs not being really flooded, your server
        is seriously misconfigured.
 
+       If you want to test which effects syncookies have to your
+       network connections you can set this knob to 2 to enable
+       unconditionally generation of syncookies.
+
 tcp_fastopen - INTEGER
        Enable TCP Fast Open feature (draft-ietf-tcpm-fastopen) to send data
        in the opening SYN packet. To use this feature, the client application
@@ -478,6 +482,15 @@ tcp_syn_retries - INTEGER
 tcp_timestamps - BOOLEAN
        Enable timestamps as defined in RFC1323.
 
+tcp_min_tso_segs - INTEGER
+       Minimal number of segments per TSO frame.
+       Since linux-3.12, TCP does an automatic sizing of TSO frames,
+       depending on flow rate, instead of filling 64Kbytes packets.
+       For specific usages, it's possible to force TCP to build big
+       TSO frames. Note that TCP stack might split too big TSO packets
+       if available window is too small.
+       Default: 2
+
 tcp_tso_win_divisor - INTEGER
        This allows control over what percentage of the congestion window
        can be consumed by a single TSO frame.
@@ -516,6 +529,19 @@ tcp_wmem - vector of 3 INTEGERs: min, default, max
        this value is ignored.
        Default: between 64K and 4MB, depending on RAM size.
 
+tcp_notsent_lowat - UNSIGNED INTEGER
+       A TCP socket can control the amount of unsent bytes in its write queue,
+       thanks to TCP_NOTSENT_LOWAT socket option. poll()/select()/epoll()
+       reports POLLOUT events if the amount of unsent bytes is below a per
+       socket value, and if the write queue is not full. sendmsg() will
+       also not add new buffers if the limit is hit.
+
+       This global variable controls the amount of unsent data for
+       sockets not using TCP_NOTSENT_LOWAT. For these sockets, a change
+       to the global variable has immediate effect.
+
+       Default: UINT_MAX (0xFFFFFFFF)
+
 tcp_workaround_signed_windows - BOOLEAN
        If set, assume no receipt of a window scaling option means the
        remote TCP is broken and treats the window as a signed quantity.
@@ -1022,7 +1048,15 @@ disable_policy - BOOLEAN
 disable_xfrm - BOOLEAN
        Disable IPSEC encryption on this interface, whatever the policy
 
+igmpv2_unsolicited_report_interval - INTEGER
+       The interval in milliseconds in which the next unsolicited
+       IGMPv1 or IGMPv2 report retransmit will take place.
+       Default: 10000 (10 seconds)
 
+igmpv3_unsolicited_report_interval - INTEGER
+       The interval in milliseconds in which the next unsolicited
+       IGMPv3 report retransmit will take place.
+       Default: 1000 (1 seconds)
 
 tag - INTEGER
        Allows you to write a number, which can be used as required.
@@ -1314,6 +1348,27 @@ ndisc_notify - BOOLEAN
        1 - Generate unsolicited neighbour advertisements when device is brought
            up or hardware address changes.
 
+mldv1_unsolicited_report_interval - INTEGER
+       The interval in milliseconds in which the next unsolicited
+       MLDv1 report retransmit will take place.
+       Default: 10000 (10 seconds)
+
+mldv2_unsolicited_report_interval - INTEGER
+       The interval in milliseconds in which the next unsolicited
+       MLDv2 report retransmit will take place.
+       Default: 1000 (1 second)
+
+force_mld_version - INTEGER
+       0 - (default) No enforcement of a MLD version, MLDv1 fallback allowed
+       1 - Enforce to use MLD version 1
+       2 - Enforce to use MLD version 2
+
+suppress_frag_ndisc - INTEGER
+       Control RFC 6980 (Security Implications of IPv6 Fragmentation
+       with IPv6 Neighbor Discovery) behavior:
+       1 - (default) discard fragmented neighbor discovery packets
+       0 - allow fragmented neighbor discovery packets
+
 icmp/*:
 ratelimit - INTEGER
        Limit the maximal rates for sending ICMPv6 packets.