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Date: Wed, 27 Feb 2019 17:00:24 -0800 (PST)
From: David Miller <davem@...emloft.net>
To: netdev@...r.kernel.org
CC: marcelo.leitner@...il.com, lucien.xin@...il.com,
nhorman@...driver.com
Subject: [PATCH RFC v3 4/5] sctp: Make sctp_enqueue_event tak an skb list.
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@...emloft.net>
---
net/sctp/stream_interleave.c | 44 +++++++++++++++++++++++++++---------
1 file changed, 33 insertions(+), 11 deletions(-)
diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index b6b251b8b3cf..0bc3d9329d9a 100644
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -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 ||
@@ -866,11 +867,15 @@ static int sctp_ulpevent_idata(struct sctp_ulpq *ulpq,
}
} 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 +949,27 @@ static struct sctp_ulpevent *sctp_intl_retrieve_first(struct sctp_ulpq *ulpq)
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 +1071,7 @@ 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 +1338,16 @@ 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 +1356,7 @@ 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,
--
2.20.1
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