From 48e4704aedb9f17213206dc649fdac90f94cb749 Mon Sep 17 00:00:00 2001 From: Jason Xing Date: Mon, 26 Feb 2024 11:22:18 +0800 Subject: tcp: add a dropreason definitions and prepare for cookie check Adding one drop reason to detect the condition of skb dropped because of hook points in cookie check and extending NO_SOCKET to consider another two cases can be used later. Signed-off-by: Jason Xing Reviewed-by: Eric Dumazet Reviewed-by: David Ahern Reviewed-by: Kuniyuki Iwashima Signed-off-by: David S. Miller --- include/net/dropreason-core.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h index 6d3a20163260..a871f061558d 100644 --- a/include/net/dropreason-core.h +++ b/include/net/dropreason-core.h @@ -54,6 +54,7 @@ FN(NEIGH_QUEUEFULL) \ FN(NEIGH_DEAD) \ FN(TC_EGRESS) \ + FN(SECURITY_HOOK) \ FN(QDISC_DROP) \ FN(CPU_BACKLOG) \ FN(XDP) \ @@ -105,7 +106,13 @@ enum skb_drop_reason { SKB_CONSUMED, /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ SKB_DROP_REASON_NOT_SPECIFIED, - /** @SKB_DROP_REASON_NO_SOCKET: socket not found */ + /** + * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. + * Reason could be one of three cases: + * 1) no established/listening socket found during lookup process + * 2) no valid request socket during 3WHS process + * 3) no valid child socket during 3WHS process + */ SKB_DROP_REASON_NO_SOCKET, /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ SKB_DROP_REASON_PKT_TOO_SMALL, @@ -271,6 +278,8 @@ enum skb_drop_reason { SKB_DROP_REASON_NEIGH_DEAD, /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ SKB_DROP_REASON_TC_EGRESS, + /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ + SKB_DROP_REASON_SECURITY_HOOK, /** * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( * failed to enqueue to current qdisc) -- cgit v1.2.3-59-g8ed1b