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| author | Yan Zhai <yan@cloudflare.com> | 2023-12-04 11:33:28 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-12-05 20:49:40 -0800 |
| commit | 2f57dd94bdef083855366138646b26b05f410d99 (patch) | |
| tree | fe70ed53771fe6e27cc88289f414c6598a6e62cd /include/net | |
| parent | 19b707c3f23a7923ab40732521123d9b59965cc4 (diff) | |
| download | linux-stable-2f57dd94bdef083855366138646b26b05f410d99.tar.gz linux-stable-2f57dd94bdef083855366138646b26b05f410d99.tar.bz2 linux-stable-2f57dd94bdef083855366138646b26b05f410d99.zip | |
packet: add a generic drop reason for receive
Commit da37845fdce2 ("packet: uses kfree_skb() for errors.") switches
from consume_skb to kfree_skb to improve error handling. However, this
could bring a lot of noises when we monitor real packet drops in
kfree_skb[1], because in tpacket_rcv or packet_rcv only packet clones
can be freed, not actual packets.
Adding a generic drop reason to allow distinguish these "clone drops".
[1]: https://lore.kernel.org/netdev/CABWYdi00L+O30Q=Zah28QwZ_5RU-xcxLFUK2Zj08A8MrLk9jzg@mail.gmail.com/
Fixes: da37845fdce2 ("packet: uses kfree_skb() for errors.")
Suggested-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Signed-off-by: Yan Zhai <yan@cloudflare.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/ZW4piNbx3IenYnuw@debian.debian
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/dropreason-core.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h index 3c70ad53a49c..278e4c7d465c 100644 --- a/include/net/dropreason-core.h +++ b/include/net/dropreason-core.h @@ -86,6 +86,7 @@ FN(IPV6_NDISC_NS_OTHERHOST) \ FN(QUEUE_PURGE) \ FN(TC_ERROR) \ + FN(PACKET_SOCK_ERROR) \ FNe(MAX) /** @@ -379,6 +380,11 @@ enum skb_drop_reason { /** @SKB_DROP_REASON_TC_ERROR: generic internal tc error. */ SKB_DROP_REASON_TC_ERROR, /** + * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors + * after its filter matches an incoming packet. + */ + SKB_DROP_REASON_PACKET_SOCK_ERROR, + /** * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which * shouldn't be used as a real 'reason' - only for tracing code gen */ |