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net: initialize mark in sockcm_init

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Avoid open coding initialization of sockcm fields.
Avoid reading the sk_priority field twice.

This ensures all callers, existing and future, will correctly try a
cmsg passed mark before sk_mark.

This patch extends support for cmsg mark to:
packet_spkt and packet_tpacket and net/can/raw.c.

This patch extends support for cmsg priority to:
packet_spkt and packet_tpacket.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20250214222720.3205500-3-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Willem de Bruijn
2025-02-14 17:26:59 -05:00
committed by Jakub Kicinski
parent aaf6532d11
commit 6ad861519a
3 changed files with 6 additions and 6 deletions
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include/net/sock.h
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@@ -1829,6 +1829,7 @@ static inline void sockcm_init(struct sockcm_cookie *sockc,
const struct sock *sk)
{
*sockc = (struct sockcm_cookie) {
.mark = READ_ONCE(sk->sk_mark),
.tsflags = READ_ONCE(sk->sk_tsflags),
.priority = READ_ONCE(sk->sk_priority),
};