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sctp: Make sctp_enqueue_event tak an skb list.

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Pass this, instead of an event.  Then everything trickles down and we
always have events a non-empty list.

Then we needs a list creating stub to place into .enqueue_event for sctp_stream_interleave_1.

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>
This commit is contained in:
David Miller 2019-04-11 15:02:04 -07:00 committed by David S. Miller
parent 5e8f641db6
commit 178ca044aa
2 changed files with 39 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
net/sctp/stream_interleave.c
View File

@ -484,14 +484,15 @@ static struct sctp_ulpevent *sctp_intl_order(struct sctp_ulpq *ulpq,
}
static int sctp_enqueue_event(struct sctp_ulpq *ulpq,
struct sctp_ulpevent *event)
struct sk_buff_head *skb_list)
{
struct sk_buff *skb = sctp_event2skb(event);
struct sock *sk = ulpq->asoc->base.sk;
struct sctp_sock *sp = sctp_sk(sk);
struct sk_buff_head *skb_list;
struct sctp_ulpevent *event;
struct sk_buff *skb;
skb_list = (struct sk_buff_head *)skb->prev;
skb = __skb_peek(skb_list);
event = sctp_skb2event(skb);
if (sk->sk_shutdown & RCV_SHUTDOWN &&
(sk->sk_shutdown & SEND_SHUTDOWN ||
@ -858,19 +859,24 @@ static int sctp_ulpevent_idata(struct sctp_ulpq *ulpq,
if (!(event->msg_flags & SCTP_DATA_UNORDERED)) {
event = sctp_intl_reasm(ulpq, event);
if (event && event->msg_flags & MSG_EOR) {
if (event) {
skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
if (event->msg_flags & MSG_EOR)
event = sctp_intl_order(ulpq, event);
}
} else {
event = sctp_intl_reasm_uo(ulpq, event);
if (event) {
skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
}
}
if (event) {
event_eor = (event->msg_flags & MSG_EOR) ? 1 : 0;
sctp_enqueue_event(ulpq, event);
sctp_enqueue_event(ulpq, &temp);
}
return event_eor;
@ -944,20 +950,27 @@ out:
static void sctp_intl_start_pd(struct sctp_ulpq *ulpq, gfp_t gfp)
{
struct sctp_ulpevent *event;
struct sk_buff_head temp;
if (!skb_queue_empty(&ulpq->reasm)) {
do {
event = sctp_intl_retrieve_first(ulpq);
if (event)
sctp_enqueue_event(ulpq, event);
if (event) {
skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
sctp_enqueue_event(ulpq, &temp);
}
} while (event);
}
if (!skb_queue_empty(&ulpq->reasm_uo)) {
do {
event = sctp_intl_retrieve_first_uo(ulpq);
if (event)
sctp_enqueue_event(ulpq, event);
if (event) {
skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
sctp_enqueue_event(ulpq, &temp);
}
} while (event);
}
}
@ -1059,7 +1072,7 @@ static void sctp_intl_reap_ordered(struct sctp_ulpq *ulpq, __u16 sid)
if (event) {
sctp_intl_retrieve_ordered(ulpq, event);
sctp_enqueue_event(ulpq, event);
sctp_enqueue_event(ulpq, &temp);
}
}
@ -1326,6 +1339,16 @@ static struct sctp_stream_interleave sctp_stream_interleave_0 = {
.handle_ftsn = sctp_handle_fwdtsn,
};
static int do_sctp_enqueue_event(struct sctp_ulpq *ulpq,
struct sctp_ulpevent *event)
{
struct sk_buff_head temp;
skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
return sctp_enqueue_event(ulpq, &temp);
}
static struct sctp_stream_interleave sctp_stream_interleave_1 = {
.data_chunk_len = sizeof(struct sctp_idata_chunk),
.ftsn_chunk_len = sizeof(struct sctp_ifwdtsn_chunk),
@ -1334,7 +1357,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_1 = {
.assign_number = sctp_chunk_assign_mid,
.validate_data = sctp_validate_idata,
.ulpevent_data = sctp_ulpevent_idata,
.enqueue_event = sctp_enqueue_event,
.enqueue_event = do_sctp_enqueue_event,
.renege_events = sctp_renege_events,
.start_pd = sctp_intl_start_pd,
.abort_pd = sctp_intl_abort_pd,

3
net/sctp/ulpqueue.c
View File

@ -116,11 +116,12 @@ int sctp_ulpq_tail_data(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk,
event = sctp_ulpq_reasm(ulpq, event);
/* Do ordering if needed. */
if ((event) && (event->msg_flags & MSG_EOR)) {
if (event) {
/* Create a temporary list to collect chunks on. */
skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
if (event->msg_flags & MSG_EOR)
event = sctp_ulpq_order(ulpq, event);
}