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| author | Eric Dumazet <edumazet@google.com> | 2026-02-16 14:28:30 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-26 14:59:40 -0800 |
| commit | 9be9100774b51b3f88424a4a708181c817e3b46b (patch) | |
| tree | 1d274ee84ed8d96a041fbf3bc8c8e5ab48fc7956 /Documentation | |
| parent | 66036be40f7f72a3dbed1c70614e5b8d17a40ed2 (diff) | |
| download | linux-9be9100774b51b3f88424a4a708181c817e3b46b.tar.gz linux-9be9100774b51b3f88424a4a708181c817e3b46b.tar.bz2 linux-9be9100774b51b3f88424a4a708181c817e3b46b.zip | |
ipv6: icmp: remove obsolete code in icmpv6_xrlim_allow()
[ Upstream commit 0201eedb69b24a6be9b7c1716287a89c4dde2320 ]
Following part was needed before the blamed commit, because
inet_getpeer_v6() second argument was the prefix.
/* Give more bandwidth to wider prefixes. */
if (rt->rt6i_dst.plen < 128)
tmo >>= ((128 - rt->rt6i_dst.plen)>>5);
Now inet_getpeer_v6() retrieves hosts, we need to remove
@tmo adjustement or wider prefixes likes /24 allow 8x
more ICMP to be sent for a given ratelimit.
As we had this issue for a while, this patch changes net.ipv6.icmp.ratelimit
default value from 1000ms to 100ms to avoid potential regressions.
Also add a READ_ONCE() when reading net->ipv6.sysctl.icmpv6_time.
Fixes: fd0273d7939f ("ipv6: Remove external dependency on rt6i_dst and rt6i_src")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Cc: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20260216142832.3834174-4-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/ip-sysctl.rst | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst index a06cb99d66dc..7a637e87005f 100644 --- a/Documentation/networking/ip-sysctl.rst +++ b/Documentation/networking/ip-sysctl.rst @@ -3195,12 +3195,13 @@ enhanced_dad - BOOLEAN =========== ratelimit - INTEGER - Limit the maximal rates for sending ICMPv6 messages. + Limit the maximal rates for sending ICMPv6 messages to a particular + peer. 0 to disable any limiting, - otherwise the minimal space between responses in milliseconds. + otherwise the space between responses in milliseconds. - Default: 1000 + Default: 100 ratemask - list of comma separated ranges For ICMPv6 message types matching the ranges in the ratemask, limit |