diff options
Diffstat (limited to 'include/net/sctp/tsnmap.h')
| -rw-r--r-- | include/net/sctp/tsnmap.h | 77 |
1 files changed, 21 insertions, 56 deletions
diff --git a/include/net/sctp/tsnmap.h b/include/net/sctp/tsnmap.h index 021947da70e..31b8dbaad45 100644 --- a/include/net/sctp/tsnmap.h +++ b/include/net/sctp/tsnmap.h @@ -1,46 +1,39 @@ -/* SCTP kernel reference Implementation +/* SCTP kernel implementation * (C) Copyright IBM Corp. 2001, 2004 * Copyright (c) 1999-2000 Cisco, Inc. * Copyright (c) 1999-2001 Motorola, Inc. * Copyright (c) 2001 Intel Corp. * - * This file is part of the SCTP kernel reference Implementation + * This file is part of the SCTP kernel implementation * * These are the definitions needed for the tsnmap type. The tsnmap is used * to track out of order TSNs received. * - * The SCTP reference implementation is free software; + * This SCTP implementation is free software; * you can redistribute it and/or modify it under the terms of * the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * - * The SCTP reference implementation is distributed in the hope that it + * This SCTP implementation is distributed in the hope that it * will be useful, but WITHOUT ANY WARRANTY; without even the implied * ************************ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with GNU CC; see the file COPYING. If not, write to - * the Free Software Foundation, 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. + * along with GNU CC; see the file COPYING. If not, see + * <http://www.gnu.org/licenses/>. * * Please send any bug reports or fixes you make to the * email address(es): - * lksctp developers <lksctp-developers@lists.sourceforge.net> - * - * Or submit a bug report through the following website: - * http://www.sf.net/projects/lksctp + * lksctp developers <linux-sctp@vger.kernel.org> * * Written or modified by: * Jon Grimm <jgrimm@us.ibm.com> * La Monte H.P. Yarroll <piggy@acm.org> * Karl Knutson <karl@athena.chicago.il.us> * Sridhar Samudrala <sri@us.ibm.com> - * - * Any bugs reported given to us we will try to fix... any fixes shared will - * be incorporated into the next SCTP release. */ #include <net/sctp/constants.h> @@ -60,18 +53,7 @@ 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 +71,15 @@ 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; @@ -105,29 +87,19 @@ struct sctp_tsnmap { * every SACK. Store up to SCTP_MAX_DUP_TSNS worth of * information. */ - __u32 dup_tsns[SCTP_MAX_DUP_TSNS]; __u16 num_dup_tsns; - - /* Record gap ack block information here. */ - struct sctp_gap_ack_block gabs[SCTP_MAX_GABS]; - - int malloced; - - __u8 raw_map[0]; + __be32 dup_tsns[SCTP_MAX_DUP_TSNS]; }; 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 +110,8 @@ 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, + struct sctp_transport *trans); /* Mark this TSN and all lower as seen. */ void sctp_tsnmap_skip(struct sctp_tsnmap *map, __u32 tsn); @@ -162,31 +135,23 @@ static inline __u16 sctp_tsnmap_num_dups(struct sctp_tsnmap *map) } /* Return pointer to duplicate tsn array as needed by SACK. */ -static inline __u32 *sctp_tsnmap_get_dups(struct sctp_tsnmap *map) +static inline __be32 *sctp_tsnmap_get_dups(struct sctp_tsnmap *map) { map->num_dup_tsns = 0; return map->dup_tsns; } /* 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); /* Refresh the count on pending data. */ __u16 sctp_tsnmap_pending(struct sctp_tsnmap *map); -/* Return pointer to gap ack blocks as needed by SACK. */ -static inline struct sctp_gap_ack_block *sctp_tsnmap_get_gabs(struct sctp_tsnmap *map) -{ - return map->gabs; -} - /* 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 |