Merge branch 'sctp-rcv-side-stream-reconf-ssn-reset-req-chunk'

Xin Long says:

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

Patch 3/7 and 4/7 are to implement receiver-side procedures for the
Outgoing and Incoming SSN Reset Request Parameter described in rfc6525
section 5.2.2 and 5.2.3

Patch 1/7 and 2/7 are ahead of them to define some apis.

Patch 5/7-7/7 are to add the process of reconf chunk event in rx path.

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:
  - re-split the patchset and make sure it has no dead codes for review.
  - rename the titles of the commits and improve some changelogs.
  - drop __packed from some structures in patch 1/7.
  - fix some kbuild warnings in patch 3/7 by initializing str_p = NULL.
  - sctp_chunk_lookup_strreset_param changes to return sctp_paramhdr_t *
    and uses sctp_strreset_tsnreq to access request_seq in patch 3/7.
  - use __u<size> in uapi sctp.h in patch 1/7.
  - do str_list endian conversion when generating stream_reset_event in patch
    2/7.
  - remove str_list endian conversion, pass resp_seq param with network endian
    to lookup_strreset_param in 3/7.
  - move str_list endian conversion out of sctp_make_strreset_req, so that
    sctp_make_strreset_req can be used more conveniently to process inreq in
    patch 4/7.
  - remove sctp_merge_reconf_chunk and not support response with multiparam
    in patch 6/7.
====================

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

1 files changed, 24 insertions, 0 deletions

diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index b055788de0cf..7a4804c4a593 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -749,4 +749,28 @@ struct sctp_strreset_addstrm {
 	__u16 reserved;
 };
 
+enum {
+	SCTP_STRRESET_NOTHING_TO_DO	= 0x00,
+	SCTP_STRRESET_PERFORMED		= 0x01,
+	SCTP_STRRESET_DENIED		= 0x02,
+	SCTP_STRRESET_ERR_WRONG_SSN	= 0x03,
+	SCTP_STRRESET_ERR_IN_PROGRESS	= 0x04,
+	SCTP_STRRESET_ERR_BAD_SEQNO	= 0x05,
+	SCTP_STRRESET_IN_PROGRESS	= 0x06,
+};
+
+struct sctp_strreset_resp {
+	sctp_paramhdr_t param_hdr;
+	__u32 response_seq;
+	__u32 result;
+};
+
+struct sctp_strreset_resptsn {
+	sctp_paramhdr_t param_hdr;
+	__u32 response_seq;
+	__u32 result;
+	__u32 senders_next_tsn;
+	__u32 receivers_next_tsn;
+};
+
 #endif /* __LINUX_SCTP_H__ */