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ipv4: icmp: icmpv4_xrlim_allow() optimization if net.ipv4.icmp_ratelimit is zero
authorEric Dumazet <edumazet@google.com>
Mon, 16 Feb 2026 14:28:31 +0000 (14:28 +0000)
committerJakub Kicinski <kuba@kernel.org>
Thu, 19 Feb 2026 00:46:36 +0000 (16:46 -0800)
commitd8d9ef29886733428470655f2f99bc7493589fcb
tree858dd55f91b832f246f5db60b1d7cb7f727c89f2tree | snapshot
parent0201eedb69b24a6be9b7c1716287a89c4dde2320commit | diff
ipv4: icmp: icmpv4_xrlim_allow() optimization if net.ipv4.icmp_ratelimit is zero

If net.ipv4.icmp_ratelimit is zero, we do not have to call
inet_getpeer_v4() and inet_peer_xrlim_allow().

Both can be very expensive under DDOS.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260216142832.3834174-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net/ipv4/icmp.c diff | blob | blame | history
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