sctp: implement start_pd for sctp_stream_interleave

start_pd is added as a member of sctp_stream_interleave, used to
do partial_delivery for data or idata when datalen >= asoc->rwnd
in sctp_eat_data. The codes have been done in last patches, but
they need to be extracted into start_pd, so that it could be used
for SCTP_CMD_PART_DELIVER cmd as well.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 4 insertions, 1 deletions

diff --git a/include/net/sctp/stream_interleave.h b/include/net/sctp/stream_interleave.h
index 16a71cb2b098..317d9b3a5299 100644
--- a/include/net/sctp/stream_interleave.h
+++ b/include/net/sctp/stream_interleave.h
@@ -45,6 +45,7 @@ struct sctp_stream_interleave {
                                  struct sctp_ulpevent *event);
         void    (*renege_events)(struct sctp_ulpq *ulpq,
                                  struct sctp_chunk *chunk, gfp_t gfp);
+        void    (*start_pd)(struct sctp_ulpq *ulpq, gfp_t gfp);
 };
 
 void sctp_stream_interleave_init(struct sctp_stream *stream);
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 2bec17ad7fc9..36710549a4ca 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -1731,7 +1731,7 @@ static int sctp_cmd_interpreter(enum sctp_event event_type,
                         break;
 
                 case SCTP_CMD_PART_DELIVER:
-                        sctp_ulpq_partial_delivery(&asoc->ulpq, GFP_ATOMIC);
+                        asoc->stream.si->start_pd(&asoc->ulpq, GFP_ATOMIC);
                         break;
 
                 case SCTP_CMD_RENEGE:
diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index d62ad5c62092..4dce8d33c5ab 100644
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -661,6 +661,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_0 = {
         .ulpevent_data          = sctp_ulpq_tail_data,
         .enqueue_event          = sctp_ulpq_tail_event,
         .renege_events          = sctp_ulpq_renege,
+        .start_pd               = sctp_ulpq_partial_delivery,
 };
 
 static struct sctp_stream_interleave sctp_stream_interleave_1 = {
@@ -672,6 +673,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_1 = {
         .ulpevent_data          = sctp_ulpevent_idata,
         .enqueue_event          = sctp_enqueue_event,
         .renege_events          = sctp_renege_events,
+        .start_pd               = sctp_intl_start_pd,
 };
 
 void sctp_stream_interleave_init(struct sctp_stream *stream)