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authorXin Long <lucien.xin@gmail.com>2017-12-14 19:41:29 +0300
committerDavid S. Miller <davem@davemloft.net>2017-12-15 21:52:22 +0300
commitde60fe9105431f504de9f8793b1da237a7d7f7ed (patch)
tree6628209f7a3f30d7d5dfd5233806122d0a6617da /net/sctp
parent47b20a88566f89dd0cc80c46f59ce0a12259d404 (diff)
downloadlinux-de60fe9105431f504de9f8793b1da237a7d7f7ed.tar.xz
sctp: implement handle_ftsn for sctp_stream_interleave
handle_ftsn is added as a member of sctp_stream_interleave, used to skip ssn for data or mid for idata, called for SCTP_CMD_PROCESS_FWDTSN cmd. sctp_handle_iftsn works for ifwdtsn, and sctp_handle_fwdtsn works for fwdtsn. Note that different from sctp_handle_fwdtsn, sctp_handle_iftsn could do stream abort pd. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo R. Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/sm_sideeffect.c15
-rw-r--r--net/sctp/stream_interleave.c49
2 files changed, 51 insertions, 13 deletions
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index be7c6dbdb283..16ddf2ca1438 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -1007,18 +1007,6 @@ static void sctp_cmd_process_operr(struct sctp_cmd_seq *cmds,
}
}
-/* Process variable FWDTSN chunk information. */
-static void sctp_cmd_process_fwdtsn(struct sctp_ulpq *ulpq,
- struct sctp_chunk *chunk)
-{
- struct sctp_fwdtsn_skip *skip;
-
- /* Walk through all the skipped SSNs */
- sctp_walk_fwdtsn(skip, chunk) {
- sctp_ulpq_skip(ulpq, ntohs(skip->stream), ntohs(skip->ssn));
- }
-}
-
/* Helper function to remove the association non-primary peer
* transports.
*/
@@ -1372,7 +1360,8 @@ static int sctp_cmd_interpreter(enum sctp_event event_type,
break;
case SCTP_CMD_PROCESS_FWDTSN:
- sctp_cmd_process_fwdtsn(&asoc->ulpq, cmd->obj.chunk);
+ asoc->stream.si->handle_ftsn(&asoc->ulpq,
+ cmd->obj.chunk);
break;
case SCTP_CMD_GEN_SACK:
diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index f62771ccaf5d..8c7cf8f08711 100644
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -1239,6 +1239,53 @@ static void sctp_report_iftsn(struct sctp_ulpq *ulpq, __u32 ftsn)
sctp_intl_abort_pd(ulpq, GFP_ATOMIC);
}
+static void sctp_handle_fwdtsn(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk)
+{
+ struct sctp_fwdtsn_skip *skip;
+
+ /* Walk through all the skipped SSNs */
+ sctp_walk_fwdtsn(skip, chunk)
+ sctp_ulpq_skip(ulpq, ntohs(skip->stream), ntohs(skip->ssn));
+}
+
+static void sctp_intl_skip(struct sctp_ulpq *ulpq, __u16 sid, __u32 mid,
+ __u8 flags)
+{
+ struct sctp_stream_in *sin = sctp_stream_in(ulpq->asoc, sid);
+ struct sctp_stream *stream = &ulpq->asoc->stream;
+
+ if (flags & SCTP_FTSN_U_BIT) {
+ if (sin->pd_mode_uo && MID_lt(sin->mid_uo, mid)) {
+ sin->pd_mode_uo = 0;
+ sctp_intl_stream_abort_pd(ulpq, sid, mid, 0x1,
+ GFP_ATOMIC);
+ }
+ return;
+ }
+
+ if (MID_lt(mid, sctp_mid_peek(stream, in, sid)))
+ return;
+
+ if (sin->pd_mode) {
+ sin->pd_mode = 0;
+ sctp_intl_stream_abort_pd(ulpq, sid, mid, 0x0, GFP_ATOMIC);
+ }
+
+ sctp_mid_skip(stream, in, sid, mid);
+
+ sctp_intl_reap_ordered(ulpq, sid);
+}
+
+static void sctp_handle_iftsn(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk)
+{
+ struct sctp_ifwdtsn_skip *skip;
+
+ /* Walk through all the skipped MIDs and abort stream pd if possible */
+ sctp_walk_ifwdtsn(skip, chunk)
+ sctp_intl_skip(ulpq, ntohs(skip->stream),
+ ntohl(skip->mid), skip->flags);
+}
+
static struct sctp_stream_interleave sctp_stream_interleave_0 = {
.data_chunk_len = sizeof(struct sctp_data_chunk),
.ftsn_chunk_len = sizeof(struct sctp_fwdtsn_chunk),
@@ -1255,6 +1302,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_0 = {
.generate_ftsn = sctp_generate_fwdtsn,
.validate_ftsn = sctp_validate_fwdtsn,
.report_ftsn = sctp_report_fwdtsn,
+ .handle_ftsn = sctp_handle_fwdtsn,
};
static struct sctp_stream_interleave sctp_stream_interleave_1 = {
@@ -1273,6 +1321,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_1 = {
.generate_ftsn = sctp_generate_iftsn,
.validate_ftsn = sctp_validate_iftsn,
.report_ftsn = sctp_report_iftsn,
+ .handle_ftsn = sctp_handle_iftsn,
};
void sctp_stream_interleave_init(struct sctp_stream *stream)