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net: lockless SO_PASSCRED, SO_PASSPIDFD and SO_PASSSEC

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sock->flags are atomic, no need to hold the socket lock
in sk_setsockopt() for SO_PASSCRED, SO_PASSPIDFD and SO_PASSSEC.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-09-21 20:28:12 +00:00 committed by David S. Miller
parent 10bbf1652c
commit 8ebfb6db5a
1 changed files with 9 additions and 11 deletions
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20
net/core/sock.c
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@ -1126,6 +1126,15 @@ int sk_setsockopt(struct sock *sk, int level, int optname,
return 0;
}
return -EPERM;
case SO_PASSSEC:
assign_bit(SOCK_PASSSEC, &sock->flags, valbool);
return 0;
case SO_PASSCRED:
assign_bit(SOCK_PASSCRED, &sock->flags, valbool);
return 0;
case SO_PASSPIDFD:
assign_bit(SOCK_PASSPIDFD, &sock->flags, valbool);
return 0;
}
sockopt_lock_sock(sk);
@ -1248,14 +1257,6 @@ set_sndbuf:
case SO_BSDCOMPAT:
break;
case SO_PASSCRED:
assign_bit(SOCK_PASSCRED, &sock->flags, valbool);
break;
case SO_PASSPIDFD:
assign_bit(SOCK_PASSPIDFD, &sock->flags, valbool);
break;
case SO_TIMESTAMP_OLD:
case SO_TIMESTAMP_NEW:
case SO_TIMESTAMPNS_OLD:
@ -1361,9 +1362,6 @@ set_sndbuf:
sock_valbool_flag(sk, SOCK_FILTER_LOCKED, valbool);
break;
case SO_PASSSEC:
assign_bit(SOCK_PASSSEC, &sock->flags, valbool);
break;
case SO_MARK:
if (!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {