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authorVlad Yasevich <vladislav.yasevich@hp.com>2008-10-09 01:19:01 +0400
committerDavid S. Miller <davem@davemloft.net>2008-10-09 01:19:01 +0400
commit02015180e2509afd2e3fe3790a333b30708a116b (patch)
treed2d92b62758f01375602cd7e44cb9ffbb3e44d59 /net
parent8e1ee18c332e08bee9d8bd66e63cd564fbf17fc2 (diff)
downloadlinux-02015180e2509afd2e3fe3790a333b30708a116b.tar.xz
sctp: shrink sctp_tsnmap some more by removing gabs array
The gabs array in the sctp_tsnmap structure is only used in one place, sctp_make_sack(). As such, carrying the array around in the sctp_tsnmap and thus directly in the sctp_association is rather pointless since most of the time it's just taking up space. Now, let sctp_make_sack create and populate it and then throw it away when it's done. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/sm_make_chunk.c6
-rw-r--r--net/sctp/tsnmap.c15
2 files changed, 12 insertions, 9 deletions
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 6dd9b3ef33d0..fd8acb48c3f2 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -702,12 +702,14 @@ struct sctp_chunk *sctp_make_sack(const struct sctp_association *asoc)
__u32 ctsn;
__u16 num_gabs, num_dup_tsns;
struct sctp_tsnmap *map = (struct sctp_tsnmap *)&asoc->peer.tsn_map;
+ struct sctp_gap_ack_block gabs[SCTP_MAX_GABS];
+ memset(gabs, 0, sizeof(gabs));
ctsn = sctp_tsnmap_get_ctsn(map);
SCTP_DEBUG_PRINTK("sackCTSNAck sent: 0x%x.\n", ctsn);
/* How much room is needed in the chunk? */
- num_gabs = sctp_tsnmap_num_gabs(map);
+ num_gabs = sctp_tsnmap_num_gabs(map, gabs);
num_dup_tsns = sctp_tsnmap_num_dups(map);
/* Initialize the SACK header. */
@@ -763,7 +765,7 @@ struct sctp_chunk *sctp_make_sack(const struct sctp_association *asoc)
/* Add the gap ack block information. */
if (num_gabs)
sctp_addto_chunk(retval, sizeof(__u32) * num_gabs,
- sctp_tsnmap_get_gabs(map));
+ gabs);
/* Add the duplicate TSN information. */
if (num_dup_tsns)
diff --git a/net/sctp/tsnmap.c b/net/sctp/tsnmap.c
index 142ed7ca424d..35c73e82553a 100644
--- a/net/sctp/tsnmap.c
+++ b/net/sctp/tsnmap.c
@@ -335,10 +335,11 @@ void sctp_tsnmap_renege(struct sctp_tsnmap *map, __u32 tsn)
}
/* How many gap ack blocks do we have recorded? */
-__u16 sctp_tsnmap_num_gabs(struct sctp_tsnmap *map)
+__u16 sctp_tsnmap_num_gabs(struct sctp_tsnmap *map,
+ struct sctp_gap_ack_block *gabs)
{
struct sctp_tsnmap_iter iter;
- int gabs = 0;
+ int ngaps = 0;
/* Refresh the gap ack information. */
if (sctp_tsnmap_has_gap(map)) {
@@ -348,14 +349,14 @@ __u16 sctp_tsnmap_num_gabs(struct sctp_tsnmap *map)
&start,
&end)) {
- map->gabs[gabs].start = htons(start);
- map->gabs[gabs].end = htons(end);
- gabs++;
- if (gabs >= SCTP_MAX_GABS)
+ gabs[ngaps].start = htons(start);
+ gabs[ngaps].end = htons(end);
+ ngaps++;
+ if (ngaps >= SCTP_MAX_GABS)
break;
}
}
- return gabs;
+ return ngaps;
}
static int sctp_tsnmap_grow(struct sctp_tsnmap *map, u16 gap)