sctp: add subscribe per asoc

The member subscribe should be per asoc, so that sockopt SCTP_EVENT
in the next patch can subscribe a event from one asoc only.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 17 insertions, 10 deletions

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index bc7808aa2760..7eaa294d938d 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -2077,6 +2077,8 @@ struct sctp_association {
 
         int sent_cnt_removable;
 
+        __u16 subscribe;
+
         __u64 abandoned_unsent[SCTP_PR_INDEX(MAX) + 1];
         __u64 abandoned_sent[SCTP_PR_INDEX(MAX) + 1];
 };
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 6a28b96e779e..685c7ef11eb4 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -135,6 +135,8 @@ static struct sctp_association *sctp_association_init(
          */
         asoc->max_burst = sp->max_burst;
 
+        asoc->subscribe = sp->subscribe;
+
         /* initialize association timers */
         asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE] = asoc->rto_initial;
         asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT] = asoc->rto_initial;
diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index 6c761af960fd..0b203b821709 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -86,11 +86,10 @@ void sctp_datamsg_free(struct sctp_datamsg *msg)
 /* Final destructruction of datamsg memory. */
 static void sctp_datamsg_destroy(struct sctp_datamsg *msg)
 {
+        struct sctp_association *asoc = NULL;
         struct list_head *pos, *temp;
         struct sctp_chunk *chunk;
-        struct sctp_sock *sp;
         struct sctp_ulpevent *ev;
-        struct sctp_association *asoc = NULL;
         int error = 0, notify;
 
         /* If we failed, we may need to notify. */
@@ -108,8 +107,7 @@ static void sctp_datamsg_destroy(struct sctp_datamsg *msg)
                         else
                                 error = asoc->outqueue.error;
 
-                        sp = sctp_sk(asoc->base.sk);
-                        notify = sctp_ulpevent_type_enabled(sp->subscribe,
+                        notify = sctp_ulpevent_type_enabled(asoc->subscribe,
                                                             SCTP_SEND_FAILED);
                 }
 
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 9d7512958a6a..c7718272d69b 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2307,6 +2307,7 @@ static int sctp_setsockopt_events(struct sock *sk, char __user *optval,
         struct sctp_event_subscribe subscribe;
         __u8 *sn_type = (__u8 *)&subscribe;
         struct sctp_sock *sp = sctp_sk(sk);
+        struct sctp_association *asoc;
         int i;
 
         if (optlen > sizeof(struct sctp_event_subscribe))
@@ -2319,14 +2320,17 @@ static int sctp_setsockopt_events(struct sock *sk, char __user *optval,
                 sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i,
                                        sn_type[i]);
 
+        list_for_each_entry(asoc, &sp->ep->asocs, asocs)
+                asoc->subscribe = sctp_sk(sk)->subscribe;
+
         /* 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(sp->subscribe, SCTP_SENDER_DRY_EVENT)) {
-                struct sctp_association *asoc = sctp_id2assoc(sk, 0);
                 struct sctp_ulpevent *event;
 
+                asoc = sctp_id2assoc(sk, 0);
                 if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
                         event = sctp_ulpevent_make_sender_dry_event(asoc,
                                         GFP_USER | __GFP_NOWARN);
diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index ceef5a3a5aac..a6bf21579466 100644
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -503,7 +503,7 @@ static int sctp_enqueue_event(struct sctp_ulpq *ulpq,
                 sk_incoming_cpu_update(sk);
         }
 
-        if (!sctp_ulpevent_is_enabled(event, sp->subscribe))
+        if (!sctp_ulpevent_is_enabled(event, ulpq->asoc->subscribe))
                 goto out_free;
 
         if (skb_list)
@@ -992,16 +992,17 @@ static void sctp_intl_stream_abort_pd(struct sctp_ulpq *ulpq, __u16 sid,
                                       __u32 mid, __u16 flags, gfp_t gfp)
 {
         struct sock *sk = ulpq->asoc->base.sk;
-        struct sctp_sock *sp = sctp_sk(sk);
         struct sctp_ulpevent *ev = NULL;
 
-        if (!sctp_ulpevent_type_enabled(sp->subscribe,
+        if (!sctp_ulpevent_type_enabled(ulpq->asoc->subscribe,
                                         SCTP_PARTIAL_DELIVERY_EVENT))
                 return;
 
         ev = sctp_ulpevent_make_pdapi(ulpq->asoc, SCTP_PARTIAL_DELIVERY_ABORTED,
                                       sid, mid, flags, gfp);
         if (ev) {
+                struct sctp_sock *sp = sctp_sk(sk);
+
                 __skb_queue_tail(&sk->sk_receive_queue, sctp_event2skb(ev));
 
                 if (!sp->data_ready_signalled) {
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index b36dd9024da3..5dde92101743 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -219,7 +219,7 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
                 sk_incoming_cpu_update(sk);
         }
         /* Check if the user wishes to receive this event.  */
-        if (!sctp_ulpevent_is_enabled(event, sp->subscribe))
+        if (!sctp_ulpevent_is_enabled(event, ulpq->asoc->subscribe))
                 goto out_free;
 
         /* If we are in partial delivery mode, post to the lobby until
@@ -1137,7 +1137,7 @@ void sctp_ulpq_abort_pd(struct sctp_ulpq *ulpq, gfp_t gfp)
 
         sk = ulpq->asoc->base.sk;
         sp = sctp_sk(sk);
-        if (sctp_ulpevent_type_enabled(sp->subscribe,
+        if (sctp_ulpevent_type_enabled(ulpq->asoc->subscribe,
                                        SCTP_PARTIAL_DELIVERY_EVENT))
                 ev = sctp_ulpevent_make_pdapi(ulpq->asoc,
                                               SCTP_PARTIAL_DELIVERY_ABORTED,