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net/sctp: Make wrappers for accessing in/out streams

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This patch introduces wrappers for accessing in/out streams indirectly.
This will enable to replace physically contiguous memory arrays
of streams with flexible arrays (or maybe any other appropriate
mechanism) which do memory allocation on a per-page basis.

Signed-off-by: Oleg Babin <obabin@virtuozzo.com>
Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Konstantin Khorenko
2018-08-10 20:11:42 +03:00
committed by David S. Miller
parent b70f1f3af4
commit 05364ca03c
9 changed files with 103 additions and 81 deletions
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35
include/net/sctp/structs.h
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@@ -398,37 +398,35 @@ void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new);
/* What is the current SSN number for this stream? */
#define sctp_ssn_peek(stream, type, sid) \
((stream)->type[sid].ssn)
(sctp_stream_##type((stream), (sid))->ssn)
/* Return the next SSN number for this stream. */
#define sctp_ssn_next(stream, type, sid) \
((stream)->type[sid].ssn++)
(sctp_stream_##type((stream), (sid))->ssn++)
/* Skip over this ssn and all below. */
#define sctp_ssn_skip(stream, type, sid, ssn) \
((stream)->type[sid].ssn = ssn + 1)
(sctp_stream_##type((stream), (sid))->ssn = ssn + 1)
/* What is the current MID number for this stream? */
#define sctp_mid_peek(stream, type, sid) \
((stream)->type[sid].mid)
(sctp_stream_##type((stream), (sid))->mid)
/* Return the next MID number for this stream. */
#define sctp_mid_next(stream, type, sid) \
((stream)->type[sid].mid++)
(sctp_stream_##type((stream), (sid))->mid++)
/* Skip over this mid and all below. */
#define sctp_mid_skip(stream, type, sid, mid) \
((stream)->type[sid].mid = mid + 1)
#define sctp_stream_in(asoc, sid) (&(asoc)->stream.in[sid])
(sctp_stream_##type((stream), (sid))->mid = mid + 1)
/* What is the current MID_uo number for this stream? */
#define sctp_mid_uo_peek(stream, type, sid) \
((stream)->type[sid].mid_uo)
(sctp_stream_##type((stream), (sid))->mid_uo)
/* Return the next MID_uo number for this stream. */
#define sctp_mid_uo_next(stream, type, sid) \
((stream)->type[sid].mid_uo++)
(sctp_stream_##type((stream), (sid))->mid_uo++)
/*
* Pointers to address related SCTP functions.
@@ -1463,6 +1461,23 @@ struct sctp_stream {
struct sctp_stream_interleave *si;
};
static inline struct sctp_stream_out *sctp_stream_out(
const struct sctp_stream *stream,
__u16 sid)
{
return ((struct sctp_stream_out *)(stream->out)) + sid;
}
static inline struct sctp_stream_in *sctp_stream_in(
const struct sctp_stream *stream,
__u16 sid)
{
return ((struct sctp_stream_in *)(stream->in)) + sid;
}
#define SCTP_SO(s, i) sctp_stream_out((s), (i))
#define SCTP_SI(s, i) sctp_stream_in((s), (i))
#define SCTP_STREAM_CLOSED 0x00
#define SCTP_STREAM_OPEN 0x01