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authorDavid Miller <davem@davemloft.net>2019-04-12 01:02:07 +0300
committerDavid S. Miller <davem@davemloft.net>2019-04-12 07:33:31 +0300
commit013b96ec64616b57fc631b304dfcecc5bc288f90 (patch)
tree0b4e504f19d268f8003d58a82b9cbbf249d36d1d /net/sctp/ulpqueue.c
parent178ca044aa60cb05102148b635cb82f6986451a3 (diff)
downloadlinux-013b96ec64616b57fc631b304dfcecc5bc288f90.tar.xz
sctp: Pass sk_buff_head explicitly to sctp_ulpq_tail_event().
Now the SKB list implementation assumption can be removed. And now that we know that the list head is always non-NULL we can remove the code blocks dealing with that as well. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/ulpqueue.c')
-rw-r--r--net/sctp/ulpqueue.c29
1 files changed, 11 insertions, 18 deletions
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index a698f1a509bf..7cdc3623fa35 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -130,7 +130,7 @@ int sctp_ulpq_tail_data(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk,
*/
if (event) {
event_eor = (event->msg_flags & MSG_EOR) ? 1 : 0;
- sctp_ulpq_tail_event(ulpq, event);
+ sctp_ulpq_tail_event(ulpq, &temp);
}
return event_eor;
@@ -194,18 +194,17 @@ static int sctp_ulpq_clear_pd(struct sctp_ulpq *ulpq)
return sctp_clear_pd(ulpq->asoc->base.sk, ulpq->asoc);
}
-/* If the SKB of 'event' is on a list, it is the first such member
- * of that list.
- */
-int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
+int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sk_buff_head *skb_list)
{
struct sock *sk = ulpq->asoc->base.sk;
struct sctp_sock *sp = sctp_sk(sk);
- struct sk_buff_head *queue, *skb_list;
- struct sk_buff *skb = sctp_event2skb(event);
+ struct sctp_ulpevent *event;
+ struct sk_buff_head *queue;
+ struct sk_buff *skb;
int clear_pd = 0;
- skb_list = (struct sk_buff_head *) skb->prev;
+ skb = __skb_peek(skb_list);
+ event = sctp_skb2event(skb);
/* If the socket is just going to throw this away, do not
* even try to deliver it.
@@ -258,13 +257,7 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
}
}
- /* If we are harvesting multiple skbs they will be
- * collected on a list.
- */
- if (skb_list)
- skb_queue_splice_tail_init(skb_list, queue);
- else
- __skb_queue_tail(queue, skb);
+ skb_queue_splice_tail_init(skb_list, queue);
/* Did we just complete partial delivery and need to get
* rolling again? Move pending data to the receive
@@ -757,7 +750,7 @@ static void sctp_ulpq_reasm_drain(struct sctp_ulpq *ulpq)
* sctp_ulpevent for very first SKB on the temp' list.
*/
if (event)
- sctp_ulpq_tail_event(ulpq, event);
+ sctp_ulpq_tail_event(ulpq, &temp);
}
}
@@ -957,7 +950,7 @@ static void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq, __u16 sid)
if (event) {
/* see if we have more ordered that we can deliver */
sctp_ulpq_retrieve_ordered(ulpq, event);
- sctp_ulpq_tail_event(ulpq, event);
+ sctp_ulpq_tail_event(ulpq, &temp);
}
}
@@ -1087,7 +1080,7 @@ void sctp_ulpq_partial_delivery(struct sctp_ulpq *ulpq,
skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
- sctp_ulpq_tail_event(ulpq, event);
+ sctp_ulpq_tail_event(ulpq, &temp);
sctp_ulpq_set_pd(ulpq);
return;
}