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authorDavid S. Miller <davem@davemloft.net>2011-07-14 18:56:40 +0400
committerDavid S. Miller <davem@davemloft.net>2011-07-14 18:56:40 +0400
commit6a7ebdf2fd15417e87b4fd02ff411aeaca34da5f (patch)
tree86b15d8cd3e25c97b348b5a61bdb16c02726a480 /net/sctp/socket.c
parentf6b72b6217f8c24f2a54988e58af858b4e66024d (diff)
parent51414d41084496aaefd06d7f19eb8206e8bfac2d (diff)
downloadlinux-6a7ebdf2fd15417e87b4fd02ff411aeaca34da5f.tar.xz
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: net/bluetooth/l2cap_core.c
Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c36
1 files changed, 31 insertions, 5 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 1c6aec1f9ec4..836aa63ee121 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1454,6 +1454,7 @@ SCTP_STATIC void sctp_close(struct sock *sk, long timeout)
struct sctp_endpoint *ep;
struct sctp_association *asoc;
struct list_head *pos, *temp;
+ unsigned int data_was_unread;
SCTP_DEBUG_PRINTK("sctp_close(sk: 0x%p, timeout:%ld)\n", sk, timeout);
@@ -1463,6 +1464,10 @@ SCTP_STATIC void sctp_close(struct sock *sk, long timeout)
ep = sctp_sk(sk)->ep;
+ /* Clean up any skbs sitting on the receive queue. */
+ data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue);
+ data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby);
+
/* Walk all associations on an endpoint. */
list_for_each_safe(pos, temp, &ep->asocs) {
asoc = list_entry(pos, struct sctp_association, asocs);
@@ -1480,7 +1485,9 @@ SCTP_STATIC void sctp_close(struct sock *sk, long timeout)
}
}
- if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
+ if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) ||
+ !skb_queue_empty(&asoc->ulpq.reasm) ||
+ (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) {
struct sctp_chunk *chunk;
chunk = sctp_make_abort_user(asoc, NULL, 0);
@@ -1490,10 +1497,6 @@ SCTP_STATIC void sctp_close(struct sock *sk, long timeout)
sctp_primitive_SHUTDOWN(asoc, NULL);
}
- /* Clean up any skbs sitting on the receive queue. */
- sctp_queue_purge_ulpevents(&sk->sk_receive_queue);
- sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby);
-
/* On a TCP-style socket, block for at most linger_time if set. */
if (sctp_style(sk, TCP) && timeout)
sctp_wait_for_close(sk, timeout);
@@ -2143,10 +2146,33 @@ static int sctp_setsockopt_disable_fragments(struct sock *sk,
static int sctp_setsockopt_events(struct sock *sk, char __user *optval,
unsigned int optlen)
{
+ struct sctp_association *asoc;
+ struct sctp_ulpevent *event;
+
if (optlen > sizeof(struct sctp_event_subscribe))
return -EINVAL;
if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen))
return -EFAULT;
+
+ /*
+ * At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
+ * if there is no data to be sent or retransmit, the stack will
+ * immediately send up this notification.
+ */
+ if (sctp_ulpevent_type_enabled(SCTP_SENDER_DRY_EVENT,
+ &sctp_sk(sk)->subscribe)) {
+ asoc = sctp_id2assoc(sk, 0);
+
+ if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
+ event = sctp_ulpevent_make_sender_dry_event(asoc,
+ GFP_ATOMIC);
+ if (!event)
+ return -ENOMEM;
+
+ sctp_ulpq_tail_event(&asoc->ulpq, event);
+ }
+ }
+
return 0;
}