This patch is to add streamout and streamin arrays in asoc, initialize
them in sctp_process_init and free them in sctp_association_free.
Stream arrays are used to replace ssnmap to save more stream things in
the next patch.
Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
---
include/net/sctp/structs.h | 18 ++++++++++++++++++
net/sctp/associola.c | 19 +++++++++++++++++++
net/sctp/sm_make_chunk.c | 17 ++++++++++++++++-
3 files changed, 53 insertions(+), 1 deletion(-)
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 87d56cc..549f17d 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -1331,6 +1331,18 @@ struct sctp_inithdr_host {
__u32 initial_tsn;
};
+struct sctp_stream_out {
+ __u16 ssn;
+ __u8 state;
+};
+
+struct sctp_stream_in {
+ __u16 ssn;
+};
+
+#define SCTP_STREAM_CLOSED 0x00
+#define SCTP_STREAM_OPEN 0x01
+
/* SCTP_GET_ASSOC_STATS counters */
struct sctp_priv_assoc_stats {
/* Maximum observed rto in the association during subsequent
@@ -1879,6 +1891,12 @@ struct sctp_association {
temp:1, /* Is it a temporary association? */
prsctp_enable:1;
+ /* stream arrays */
+ struct sctp_stream_out *streamout;
+ struct sctp_stream_in *streamin;
+ __u16 streamoutcnt;
+ __u16 streamincnt;
+
struct sctp_priv_assoc_stats stats;
int sent_cnt_removable;
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index d3cc30c..290ec4d 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -361,6 +361,10 @@ void sctp_association_free(struct sctp_association *asoc)
/* Free ssnmap storage. */
sctp_ssnmap_free(asoc->ssnmap);
+ /* Free stream information. */
+ kfree(asoc->streamout);
+ kfree(asoc->streamin);
+
/* Clean up the bound address list. */
sctp_bind_addr_free(&asoc->base.bind_addr);
@@ -1130,6 +1134,8 @@ void sctp_assoc_update(struct sctp_association *asoc,
* has been discarded and needs retransmission.
*/
if (asoc->state >= SCTP_STATE_ESTABLISHED) {
+ int i;
+
asoc->next_tsn = new->next_tsn;
asoc->ctsn_ack_point = new->ctsn_ack_point;
asoc->adv_peer_ack_point = new->adv_peer_ack_point;
@@ -1139,6 +1145,12 @@ void sctp_assoc_update(struct sctp_association *asoc,
*/
sctp_ssnmap_clear(asoc->ssnmap);
+ for (i = 0; i < asoc->streamoutcnt; i++)
+ asoc->streamout[i].ssn = 0;
+
+ for (i = 0; i < asoc->streamincnt; i++)
+ asoc->streamin[i].ssn = 0;
+
/* Flush the ULP reassembly and ordered queue.
* Any data there will now be stale and will
* cause problems.
@@ -1168,6 +1180,13 @@ void sctp_assoc_update(struct sctp_association *asoc,
new->ssnmap = NULL;
}
+ if (!asoc->streamin && !asoc->streamout) {
+ asoc->streamout = new->streamout;
+ asoc->streamin = new->streamin;
+ new->streamout = NULL;
+ new->streamin = NULL;
+ }
+
if (!asoc->assoc_id) {
/* get a new association id since we don't have one
* yet.
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 9e9690b..eeadeef 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -2442,13 +2442,28 @@ int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk,
* association.
*/
if (!asoc->temp) {
- int error;
+ int error, i;
+
+ asoc->streamoutcnt = asoc->c.sinit_num_ostreams;
+ asoc->streamincnt = asoc->c.sinit_max_instreams;
asoc->ssnmap = sctp_ssnmap_new(asoc->c.sinit_max_instreams,
asoc->c.sinit_num_ostreams, gfp);
if (!asoc->ssnmap)
goto clean_up;
+ asoc->streamout = kcalloc(asoc->streamoutcnt,
+ sizeof(*asoc->streamout), gfp);
+ if (!asoc->streamout)
+ goto clean_up;
+ for (i = 0; i < asoc->streamoutcnt; i++)
+ asoc->streamout[i].state = SCTP_STREAM_OPEN;
+
+ asoc->streamin = kcalloc(asoc->streamincnt,
+ sizeof(*asoc->streamin), gfp);
+ if (!asoc->streamin)
+ goto clean_up;
+
error = sctp_assoc_set_id(asoc, gfp);
if (error)
goto clean_up;
--
2.1.0
--
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