@@ -2688,7 +2688,7 @@ static inline bool sk_dev_equal_l3scope(struct sock *sk, int dif)
void sock_def_readable(struct sock *sk);
-int sock_bindtoindex(struct sock *sk, int ifindex);
+int sock_bindtoindex(struct sock *sk, int ifindex, bool lock_sk);
void sock_enable_timestamps(struct sock *sk);
void sock_no_linger(struct sock *sk);
void sock_set_keepalive(struct sock *sk);
@@ -594,13 +594,15 @@ static int sock_bindtoindex_locked(struct sock *sk, int ifindex)
return ret;
}
-int sock_bindtoindex(struct sock *sk, int ifindex)
+int sock_bindtoindex(struct sock *sk, int ifindex, bool lock_sk)
{
int ret;
- lock_sock(sk);
+ if (lock_sk)
+ lock_sock(sk);
ret = sock_bindtoindex_locked(sk, ifindex);
- release_sock(sk);
+ if (lock_sk)
+ release_sock(sk);
return ret;
}
@@ -646,7 +648,7 @@ static int sock_setbindtodevice(struct sock *sk, char __user *optval,
goto out;
}
- return sock_bindtoindex(sk, index);
+ return sock_bindtoindex(sk, index, true);
out:
#endif
@@ -22,7 +22,7 @@ int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
goto error;
if (cfg->bind_ifindex) {
- err = sock_bindtoindex(sock->sk, cfg->bind_ifindex);
+ err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true);
if (err < 0)
goto error;
}
@@ -30,7 +30,7 @@ int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
goto error;
}
if (cfg->bind_ifindex) {
- err = sock_bindtoindex(sock->sk, cfg->bind_ifindex);
+ err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true);
if (err < 0)
goto error;
}
The sock_bindtoindex intended for kernel wide usage however it will lock the socket regardless of the context. This modification relax this behavior optionally: locking the socket will be optional by calling the sock_bindtoindex with lock_sk = true. The modification applied to all users of the sock_bindtoindex. Signed-off-by: Ferenc Fejes <fejes@inf.elte.hu> --- include/net/sock.h | 2 +- net/core/sock.c | 10 ++++++---- net/ipv4/udp_tunnel.c | 2 +- net/ipv6/ip6_udp_tunnel.c | 2 +- 4 files changed, 9 insertions(+), 7 deletions(-)