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sock: Introduce sk_set_prio_allowed helper function

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Simplify priority setting permissions with the 'sk_set_prio_allowed'
function, centralizing the validation logic. This change is made in
anticipation of a second caller in a following patch.
No functional changes.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Anna Emese Nyiri <annaemesenyiri@gmail.com>
Link: https://patch.msgid.link/20241213084457.45120-2-annaemesenyiri@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Anna Emese Nyiri 2024-12-13 09:44:54 +01:00 committed by Jakub Kicinski
parent 4fe205539c
commit 77ec16be75
1 changed files with 8 additions and 3 deletions
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11
net/core/sock.c
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@ -454,6 +454,13 @@ static int sock_set_timeout(long *timeo_p, sockptr_t optval, int optlen,
return 0;
}
static bool sk_set_prio_allowed(const struct sock *sk, int val)
{
return ((val >= TC_PRIO_BESTEFFORT && val <= TC_PRIO_INTERACTIVE) ||
sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) ||
sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN));
}
static bool sock_needs_netstamp(const struct sock *sk)
{
switch (sk->sk_family) {
@ -1193,9 +1200,7 @@ int sk_setsockopt(struct sock *sk, int level, int optname,
/* handle options which do not require locking the socket. */
switch (optname) {
case SO_PRIORITY:
if ((val >= 0 && val <= 6) ||
sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) ||
sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
if (sk_set_prio_allowed(sk, val)) {
sock_set_priority(sk, val);
return 0;
}