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-rw-r--r--include/net/sctp/constants.h4
-rw-r--r--include/net/sctp/structs.h1
-rw-r--r--include/net/sctp/tsnmap.h39
3 files changed, 12 insertions, 32 deletions
diff --git a/include/net/sctp/constants.h b/include/net/sctp/constants.h
index c32ddf0279c..b05b0557211 100644
--- a/include/net/sctp/constants.h
+++ b/include/net/sctp/constants.h
@@ -261,7 +261,9 @@ enum { SCTP_ARBITRARY_COOKIE_ECHO_LEN = 200 };
* must be less than 65535 (2^16 - 1), or we will have overflow
* problems creating SACK's.
*/
-#define SCTP_TSN_MAP_SIZE 2048
+#define SCTP_TSN_MAP_INITIAL BITS_PER_LONG
+#define SCTP_TSN_MAP_INCREMENT SCTP_TSN_MAP_INITIAL
+#define SCTP_TSN_MAP_SIZE 4096
#define SCTP_TSN_MAX_GAP 65535
/* We will not record more than this many duplicate TSNs between two
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 94c62e4ddea..9661d7b765f 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -1545,7 +1545,6 @@ struct sctp_association {
* in tsn_map--we get it by calling sctp_tsnmap_get_ctsn().
*/
struct sctp_tsnmap tsn_map;
- __u8 _map[sctp_tsnmap_storage_size(SCTP_TSN_MAP_SIZE)];
/* Ack State : This flag indicates if the next received
* : packet is to be responded to with a
diff --git a/include/net/sctp/tsnmap.h b/include/net/sctp/tsnmap.h
index 099211bf998..6dabbee8bbd 100644
--- a/include/net/sctp/tsnmap.h
+++ b/include/net/sctp/tsnmap.h
@@ -60,18 +60,7 @@ struct sctp_tsnmap {
* It points at one of the two buffers with which we will
* ping-pong between.
*/
- __u8 *tsn_map;
-
- /* This marks the tsn which overflows the tsn_map, when the
- * cumulative ack point reaches this point we know we can switch
- * maps (tsn_map and overflow_map swap).
- */
- __u32 overflow_tsn;
-
- /* This is the overflow array for tsn_map.
- * It points at one of the other ping-pong buffers.
- */
- __u8 *overflow_map;
+ unsigned long *tsn_map;
/* This is the TSN at tsn_map[0]. */
__u32 base_tsn;
@@ -89,15 +78,15 @@ struct sctp_tsnmap {
*/
__u32 cumulative_tsn_ack_point;
+ /* This is the highest TSN we've marked. */
+ __u32 max_tsn_seen;
+
/* This is the minimum number of TSNs we can track. This corresponds
* to the size of tsn_map. Note: the overflow_map allows us to
* potentially track more than this quantity.
*/
__u16 len;
- /* This is the highest TSN we've marked. */
- __u32 max_tsn_seen;
-
/* Data chunks pending receipt. used by SCTP_STATUS sockopt */
__u16 pending_data;
@@ -110,24 +99,17 @@ struct sctp_tsnmap {
/* Record gap ack block information here. */
struct sctp_gap_ack_block gabs[SCTP_MAX_GABS];
-
- int malloced;
-
- __u8 raw_map[0];
};
struct sctp_tsnmap_iter {
__u32 start;
};
-/* This macro assists in creation of external storage for variable length
- * internal buffers. We double allocate so the overflow map works.
- */
-#define sctp_tsnmap_storage_size(count) (sizeof(__u8) * (count) * 2)
-
/* Initialize a block of memory as a tsnmap. */
struct sctp_tsnmap *sctp_tsnmap_init(struct sctp_tsnmap *, __u16 len,
- __u32 initial_tsn);
+ __u32 initial_tsn, gfp_t gfp);
+
+void sctp_tsnmap_free(struct sctp_tsnmap *map);
/* Test the tracking state of this TSN.
* Returns:
@@ -138,7 +120,7 @@ struct sctp_tsnmap *sctp_tsnmap_init(struct sctp_tsnmap *, __u16 len,
int sctp_tsnmap_check(const struct sctp_tsnmap *, __u32 tsn);
/* Mark this TSN as seen. */
-void sctp_tsnmap_mark(struct sctp_tsnmap *, __u32 tsn);
+int sctp_tsnmap_mark(struct sctp_tsnmap *, __u32 tsn);
/* Mark this TSN and all lower as seen. */
void sctp_tsnmap_skip(struct sctp_tsnmap *map, __u32 tsn);
@@ -183,10 +165,7 @@ static inline struct sctp_gap_ack_block *sctp_tsnmap_get_gabs(struct sctp_tsnmap
/* Is there a gap in the TSN map? */
static inline int sctp_tsnmap_has_gap(const struct sctp_tsnmap *map)
{
- int has_gap;
-
- has_gap = (map->cumulative_tsn_ack_point != map->max_tsn_seen);
- return has_gap;
+ return (map->cumulative_tsn_ack_point != map->max_tsn_seen);
}
/* Mark a duplicate TSN. Note: limit the storage of duplicate TSN