Merge branch 'sctp-sender-side-stream-reconf-ssn-reset-request-chunk'

Xin Long says:

====================
sctp: add sender-side procedures for stream reconf ssn reset request chunk

Patch 6/6 is to implement sender-side procedures for the Outgoing
and Incoming SSN Reset Request Parameter described in rfc6525
section 5.1.2 and 5.1.3

Patches 1-5/6 are ahead of it to define some apis and asoc members
for it.

Note that with this patchset, asoc->reconf_enable has no chance yet to
be set, until the patch "sctp: add get and set sockopt for reconf_enable"
is applied in the future. As we can not just enable it when sctp is not
capable of processing reconf chunk yet.

v1->v2:
  - put these into a smaller group.
  - rename some temporary variables in the codes.
  - rename the titles of the commits and improve some changelogs.
v2->v3:
  - re-split the patchset and make sure it has no dead codes for review.
v3->v4:
  - move sctp_make_reconf() into patch 1/6 to avoid kbuild warning.
  - drop unused struct sctp_strreset_req.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
index a406adcc0793..03c27cefffb1 100644
--- a/include/uapi/linux/sctp.h
+++ b/include/uapi/linux/sctp.h
@@ -115,6 +115,8 @@ typedef __s32 sctp_assoc_t;
 #define SCTP_PR_SUPPORTED	113
 #define SCTP_DEFAULT_PRINFO	114
 #define SCTP_PR_ASSOC_STATUS	115
+#define SCTP_ENABLE_STREAM_RESET	118
+#define SCTP_RESET_STREAMS	119
 
 /* PR-SCTP policies */
 #define SCTP_PR_SCTP_NONE	0x0000
@@ -138,6 +140,15 @@ typedef __s32 sctp_assoc_t;
 #define SCTP_PR_RTX_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
 #define SCTP_PR_PRIO_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)
 
+/* For enable stream reset */
+#define SCTP_ENABLE_RESET_STREAM_REQ	0x01
+#define SCTP_ENABLE_RESET_ASSOC_REQ	0x02
+#define SCTP_ENABLE_CHANGE_ASSOC_REQ	0x04
+#define SCTP_ENABLE_STRRESET_MASK	0x07
+
+#define SCTP_STREAM_RESET_INCOMING	0x01
+#define SCTP_STREAM_RESET_OUTGOING	0x02
+
 /* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
 /* On user space Linux, these live in <bits/socket.h> as an enum.  */
 enum sctp_msg_flags {
@@ -1008,4 +1019,11 @@ struct sctp_info {
 	__u32	__reserved3;
 };
 
+struct sctp_reset_streams {
+	sctp_assoc_t srs_assoc_id;
+	uint16_t srs_flags;
+	uint16_t srs_number_streams;	/* 0 == ALL */
+	uint16_t srs_stream_list[];	/* list if srs_num_streams is not 0 */
+};
+
 #endif /* _UAPI_SCTP_H */