Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[sfrench/cifs-2.6.git] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index acdfb5d2bcaa44a8a0ecdcfcae14202d1ed75bc3..725b8bea58a78bba07c7cf4c0cbd5f615d3c065f 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -81,6 +81,11 @@ fib_multipath_hash_policy - INTEGER
        0 - Layer 3
        1 - Layer 4
 
+fib_sync_mem - UNSIGNED INTEGER
+       Amount of dirty memory from fib entries that can be backlogged before
+       synchronize_rcu is forced.
+         Default: 512kB   Minimum: 64kB   Maximum: 64MB
+
 ip_forward_update_priority - INTEGER
        Whether to update SKB priority from "TOS" field in IPv4 header after it
        is forwarded. The new SKB priority is mapped from TOS field value
@@ -422,6 +427,7 @@ tcp_min_rtt_wlen - INTEGER
        minimum RTT when it is moved to a longer path (e.g., due to traffic
        engineering). A longer window makes the filter more resistant to RTT
        inflations such as transient congestion. The unit is seconds.
+       Possible values: 0 - 86400 (1 day)
        Default: 300
 
 tcp_moderate_rcvbuf - BOOLEAN
@@ -1336,6 +1342,7 @@ tag - INTEGER
        Default value is 0.
 
 xfrm4_gc_thresh - INTEGER
+       (Obsolete since linux-4.14)
        The threshold at which we will start garbage collecting for IPv4
        destination cache entries.  At twice this value the system will
        refuse new allocations.
@@ -1908,17 +1915,43 @@ enhanced_dad - BOOLEAN
 
 icmp/*:
 ratelimit - INTEGER
-       Limit the maximal rates for sending ICMPv6 packets.
+       Limit the maximal rates for sending ICMPv6 messages.
        0 to disable any limiting,
        otherwise the minimal space between responses in milliseconds.
        Default: 1000
 
+ratemask - list of comma separated ranges
+       For ICMPv6 message types matching the ranges in the ratemask, limit
+       the sending of the message according to ratelimit parameter.
+
+       The format used for both input and output is a comma separated
+       list of ranges (e.g. "0-127,129" for ICMPv6 message type 0 to 127 and
+       129). Writing to the file will clear all previous ranges of ICMPv6
+       message types and update the current list with the input.
+
+       Refer to: https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml
+       for numerical values of ICMPv6 message types, e.g. echo request is 128
+       and echo reply is 129.
+
+       Default: 0-1,3-127 (rate limit ICMPv6 errors except Packet Too Big)
+
 echo_ignore_all - BOOLEAN
        If set non-zero, then the kernel will ignore all ICMP ECHO
        requests sent to it over the IPv6 protocol.
        Default: 0
 
+echo_ignore_multicast - BOOLEAN
+       If set non-zero, then the kernel will ignore all ICMP ECHO
+       requests sent to it over the IPv6 protocol via multicast.
+       Default: 0
+
+echo_ignore_anycast - BOOLEAN
+       If set non-zero, then the kernel will ignore all ICMP ECHO
+       requests sent to it over the IPv6 protocol destined to anycast address.
+       Default: 0
+
 xfrm6_gc_thresh - INTEGER
+       (Obsolete since linux-4.14)
        The threshold at which we will start garbage collecting for IPv6
        destination cache entries.  At twice this value the system will
        refuse new allocations.