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bpf: Don't check sk_fullsock() in bpf_skc_to_unix_sock().

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AF_UNIX does not use TCP_NEW_SYN_RECV nor TCP_TIME_WAIT and
checking sk->sk_family is sufficient.

Let's remove sk_fullsock() and use sk_is_unix() in
bpf_skc_to_unix_sock().

Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20260203213442.682838-3-kuniyu@google.com
This commit is contained in:
Kuniyuki Iwashima 2026-02-03 21:30:07 +00:00 committed by Martin KaFai Lau
parent f06581392e
commit c26b098bf4
1 changed files with 1 additions and 1 deletions
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2
net/core/filter.c
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@ -12021,7 +12021,7 @@ BPF_CALL_1(bpf_skc_to_unix_sock, struct sock *, sk)
* trigger an explicit type generation here.
*/
BTF_TYPE_EMIT(struct unix_sock);
if (sk && sk_fullsock(sk) && sk->sk_family == AF_UNIX)
if (sk && sk_is_unix(sk))
return (unsigned long)sk;
return (unsigned long)NULL;