diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/dccp/ipv4.c | 3 | ||||
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 11 | ||||
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 3 | ||||
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 95 |
4 files changed, 16 insertions, 96 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 656e13e38cf..1ac3e30ae79 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -37,7 +37,8 @@ EXPORT_SYMBOL_GPL(dccp_hashinfo); static int dccp_v4_get_port(struct sock *sk, const unsigned short snum) { - return inet_csk_get_port(&dccp_hashinfo, sk, snum); + return inet_csk_get_port(&dccp_hashinfo, sk, snum, + inet_csk_bind_conflict); } static void dccp_v4_hash(struct sock *sk) diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index 3fe021f1a56..f05b6e76110 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -37,7 +37,8 @@ EXPORT_SYMBOL(inet_csk_timer_bug_msg); */ int sysctl_local_port_range[2] = { 1024, 4999 }; -static inline int inet_csk_bind_conflict(struct sock *sk, struct inet_bind_bucket *tb) +int inet_csk_bind_conflict(const struct sock *sk, + const struct inet_bind_bucket *tb) { const u32 sk_rcv_saddr = inet_rcv_saddr(sk); struct sock *sk2; @@ -62,11 +63,15 @@ static inline int inet_csk_bind_conflict(struct sock *sk, struct inet_bind_bucke return node != NULL; } +EXPORT_SYMBOL_GPL(inet_csk_bind_conflict); + /* Obtain a reference to a local port for the given sock, * if snum is zero it means select any available local port. */ int inet_csk_get_port(struct inet_hashinfo *hashinfo, - struct sock *sk, unsigned short snum) + struct sock *sk, unsigned short snum, + int (*bind_conflict)(const struct sock *sk, + const struct inet_bind_bucket *tb)) { struct inet_bind_hashbucket *head; struct hlist_node *node; @@ -125,7 +130,7 @@ tb_found: goto success; } else { ret = 1; - if (inet_csk_bind_conflict(sk, tb)) + if (bind_conflict(sk, tb)) goto fail_unlock; } } diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 4d5021e1929..2aa19c89a94 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -97,7 +97,8 @@ struct inet_hashinfo __cacheline_aligned tcp_hashinfo = { static int tcp_v4_get_port(struct sock *sk, unsigned short snum) { - return inet_csk_get_port(&tcp_hashinfo, sk, snum); + return inet_csk_get_port(&tcp_hashinfo, sk, snum, + inet_csk_bind_conflict); } static void tcp_v4_hash(struct sock *sk) diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 8827389abaf..76c8f5a2f7f 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -76,8 +76,8 @@ static int tcp_v6_xmit(struct sk_buff *skb, int ipfragok); static struct tcp_func ipv6_mapped; static struct tcp_func ipv6_specific; -static inline int tcp_v6_bind_conflict(const struct sock *sk, - const struct inet_bind_bucket *tb) +int inet6_csk_bind_conflict(const struct sock *sk, + const struct inet_bind_bucket *tb) { const struct sock *sk2; const struct hlist_node *node; @@ -97,97 +97,10 @@ static inline int tcp_v6_bind_conflict(const struct sock *sk, return node != NULL; } -/* Grrr, addr_type already calculated by caller, but I don't want - * to add some silly "cookie" argument to this method just for that. - * But it doesn't matter, the recalculation is in the rarest path - * this function ever takes. - */ static int tcp_v6_get_port(struct sock *sk, unsigned short snum) { - struct inet_bind_hashbucket *head; - struct inet_bind_bucket *tb; - struct hlist_node *node; - int ret; - - local_bh_disable(); - if (snum == 0) { - int low = sysctl_local_port_range[0]; - int high = sysctl_local_port_range[1]; - int remaining = (high - low) + 1; - int rover = net_random() % (high - low) + low; - - do { - head = &tcp_hashinfo.bhash[inet_bhashfn(rover, tcp_hashinfo.bhash_size)]; - spin_lock(&head->lock); - inet_bind_bucket_for_each(tb, node, &head->chain) - if (tb->port == rover) - goto next; - break; - next: - spin_unlock(&head->lock); - if (++rover > high) - rover = low; - } while (--remaining > 0); - - /* Exhausted local port range during search? It is not - * possible for us to be holding one of the bind hash - * locks if this test triggers, because if 'remaining' - * drops to zero, we broke out of the do/while loop at - * the top level, not from the 'break;' statement. - */ - ret = 1; - if (unlikely(remaining <= 0)) - goto fail; - - /* OK, here is the one we will use. */ - snum = rover; - } else { - head = &tcp_hashinfo.bhash[inet_bhashfn(snum, tcp_hashinfo.bhash_size)]; - spin_lock(&head->lock); - inet_bind_bucket_for_each(tb, node, &head->chain) - if (tb->port == snum) - goto tb_found; - } - tb = NULL; - goto tb_not_found; -tb_found: - if (tb && !hlist_empty(&tb->owners)) { - if (tb->fastreuse > 0 && sk->sk_reuse && - sk->sk_state != TCP_LISTEN) { - goto success; - } else { - ret = 1; - if (tcp_v6_bind_conflict(sk, tb)) - goto fail_unlock; - } - } -tb_not_found: - ret = 1; - if (tb == NULL) { - tb = inet_bind_bucket_create(tcp_hashinfo.bind_bucket_cachep, head, snum); - if (tb == NULL) - goto fail_unlock; - } - if (hlist_empty(&tb->owners)) { - if (sk->sk_reuse && sk->sk_state != TCP_LISTEN) - tb->fastreuse = 1; - else - tb->fastreuse = 0; - } else if (tb->fastreuse && - (!sk->sk_reuse || sk->sk_state == TCP_LISTEN)) - tb->fastreuse = 0; - -success: - if (!inet_csk(sk)->icsk_bind_hash) - inet_bind_hash(sk, tb, snum); - BUG_TRAP(inet_csk(sk)->icsk_bind_hash == tb); - ret = 0; - -fail_unlock: - spin_unlock(&head->lock); -fail: - local_bh_enable(); - return ret; + return inet_csk_get_port(&tcp_hashinfo, sk, snum, + inet6_csk_bind_conflict); } static __inline__ void __tcp_v6_hash(struct sock *sk) |