net/sctp: Make wrappers for accessing in/out streams
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>
diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index f1f1d1b..7ca6fe4 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -162,7 +162,7 @@ int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt,
stream->outcnt = outcnt;
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_OPEN;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN;
sched->init(stream);
@@ -193,7 +193,7 @@ int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid)
soute = kzalloc(sizeof(*soute), GFP_KERNEL);
if (!soute)
return -ENOMEM;
- stream->out[sid].ext = soute;
+ SCTP_SO(stream, sid)->ext = soute;
return sctp_sched_init_sid(stream, sid, GFP_KERNEL);
}
@@ -205,7 +205,7 @@ void sctp_stream_free(struct sctp_stream *stream)
sched->free(stream);
for (i = 0; i < stream->outcnt; i++)
- kfree(stream->out[i].ext);
+ kfree(SCTP_SO(stream, i)->ext);
kfree(stream->out);
kfree(stream->in);
}
@@ -215,12 +215,12 @@ void sctp_stream_clear(struct sctp_stream *stream)
int i;
for (i = 0; i < stream->outcnt; i++) {
- stream->out[i].mid = 0;
- stream->out[i].mid_uo = 0;
+ SCTP_SO(stream, i)->mid = 0;
+ SCTP_SO(stream, i)->mid_uo = 0;
}
for (i = 0; i < stream->incnt; i++)
- stream->in[i].mid = 0;
+ SCTP_SI(stream, i)->mid = 0;
}
void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new)
@@ -273,8 +273,8 @@ static bool sctp_stream_outq_is_empty(struct sctp_stream *stream,
for (i = 0; i < str_nums; i++) {
__u16 sid = ntohs(str_list[i]);
- if (stream->out[sid].ext &&
- !list_empty(&stream->out[sid].ext->outq))
+ if (SCTP_SO(stream, sid)->ext &&
+ !list_empty(&SCTP_SO(stream, sid)->ext->outq))
return false;
}
@@ -361,11 +361,11 @@ int sctp_send_reset_streams(struct sctp_association *asoc,
if (out) {
if (str_nums)
for (i = 0; i < str_nums; i++)
- stream->out[str_list[i]].state =
+ SCTP_SO(stream, str_list[i])->state =
SCTP_STREAM_CLOSED;
else
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_CLOSED;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED;
}
asoc->strreset_chunk = chunk;
@@ -380,11 +380,11 @@ int sctp_send_reset_streams(struct sctp_association *asoc,
if (str_nums)
for (i = 0; i < str_nums; i++)
- stream->out[str_list[i]].state =
+ SCTP_SO(stream, str_list[i])->state =
SCTP_STREAM_OPEN;
else
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_OPEN;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN;
goto out;
}
@@ -418,7 +418,7 @@ int sctp_send_reset_assoc(struct sctp_association *asoc)
/* Block further xmit of data until this request is completed */
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_CLOSED;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED;
asoc->strreset_chunk = chunk;
sctp_chunk_hold(asoc->strreset_chunk);
@@ -429,7 +429,7 @@ int sctp_send_reset_assoc(struct sctp_association *asoc)
asoc->strreset_chunk = NULL;
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_OPEN;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN;
return retval;
}
@@ -609,10 +609,10 @@ struct sctp_chunk *sctp_process_strreset_outreq(
}
for (i = 0; i < nums; i++)
- stream->in[ntohs(str_p[i])].mid = 0;
+ SCTP_SI(stream, ntohs(str_p[i]))->mid = 0;
} else {
for (i = 0; i < stream->incnt; i++)
- stream->in[i].mid = 0;
+ SCTP_SI(stream, i)->mid = 0;
}
result = SCTP_STRRESET_PERFORMED;
@@ -683,11 +683,11 @@ struct sctp_chunk *sctp_process_strreset_inreq(
if (nums)
for (i = 0; i < nums; i++)
- stream->out[ntohs(str_p[i])].state =
+ SCTP_SO(stream, ntohs(str_p[i]))->state =
SCTP_STREAM_CLOSED;
else
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_CLOSED;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_CLOSED;
asoc->strreset_chunk = chunk;
asoc->strreset_outstanding = 1;
@@ -786,11 +786,11 @@ struct sctp_chunk *sctp_process_strreset_tsnreq(
* incoming and outgoing streams.
*/
for (i = 0; i < stream->outcnt; i++) {
- stream->out[i].mid = 0;
- stream->out[i].mid_uo = 0;
+ SCTP_SO(stream, i)->mid = 0;
+ SCTP_SO(stream, i)->mid_uo = 0;
}
for (i = 0; i < stream->incnt; i++)
- stream->in[i].mid = 0;
+ SCTP_SI(stream, i)->mid = 0;
result = SCTP_STRRESET_PERFORMED;
@@ -979,15 +979,18 @@ struct sctp_chunk *sctp_process_strreset_resp(
sizeof(__u16);
if (result == SCTP_STRRESET_PERFORMED) {
+ struct sctp_stream_out *sout;
if (nums) {
for (i = 0; i < nums; i++) {
- stream->out[ntohs(str_p[i])].mid = 0;
- stream->out[ntohs(str_p[i])].mid_uo = 0;
+ sout = SCTP_SO(stream, ntohs(str_p[i]));
+ sout->mid = 0;
+ sout->mid_uo = 0;
}
} else {
for (i = 0; i < stream->outcnt; i++) {
- stream->out[i].mid = 0;
- stream->out[i].mid_uo = 0;
+ sout = SCTP_SO(stream, i);
+ sout->mid = 0;
+ sout->mid_uo = 0;
}
}
@@ -995,7 +998,7 @@ struct sctp_chunk *sctp_process_strreset_resp(
}
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_OPEN;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN;
*evp = sctp_ulpevent_make_stream_reset_event(asoc, flags,
nums, str_p, GFP_ATOMIC);
@@ -1050,15 +1053,15 @@ struct sctp_chunk *sctp_process_strreset_resp(
asoc->adv_peer_ack_point = asoc->ctsn_ack_point;
for (i = 0; i < stream->outcnt; i++) {
- stream->out[i].mid = 0;
- stream->out[i].mid_uo = 0;
+ SCTP_SO(stream, i)->mid = 0;
+ SCTP_SO(stream, i)->mid_uo = 0;
}
for (i = 0; i < stream->incnt; i++)
- stream->in[i].mid = 0;
+ SCTP_SI(stream, i)->mid = 0;
}
for (i = 0; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_OPEN;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN;
*evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags,
stsn, rtsn, GFP_ATOMIC);
@@ -1072,7 +1075,7 @@ struct sctp_chunk *sctp_process_strreset_resp(
if (result == SCTP_STRRESET_PERFORMED)
for (i = number; i < stream->outcnt; i++)
- stream->out[i].state = SCTP_STREAM_OPEN;
+ SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN;
else
stream->outcnt = number;