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net: dropreason: add SKB_DROP_REASON_FRAG_TOO_FAR

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IPv4 reassembly unit can decide to drop frags based on
/proc/sys/net/ipv4/ipfrag_max_dist sysctl.

Add a specific drop reason to track this specific
and weird case.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet
2022-10-29 15:45:20 +00:00
committed by Jakub Kicinski
parent 77adfd3a1d
commit 3bdfb04f13
2 changed files with 7 additions and 1 deletions
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2
net/ipv4/ip_fragment.c
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@@ -256,7 +256,7 @@ static int ip_frag_reinit(struct ipq *qp)
}
sum_truesize = inet_frag_rbtree_purge(&qp->q.rb_fragments,
SKB_DROP_REASON_NOT_SPECIFIED);
SKB_DROP_REASON_FRAG_TOO_FAR);
sub_frag_mem_limit(qp->q.fqdir, sum_truesize);
qp->q.flags = 0;