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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_LOG_H__
19#define __XFS_LOG_H__
20
21/* get lsn fields */
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#define CYCLE_LSN(lsn) ((uint)((lsn)>>32))
23#define BLOCK_LSN(lsn) ((uint)(lsn))
Christoph Hellwigb53e6752007-10-12 10:59:34 +100024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025/* this is used in a spot where we might otherwise double-endian-flip */
Christoph Hellwigb53e6752007-10-12 10:59:34 +100026#define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0])
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28#ifdef __KERNEL__
29/*
Nathan Scottc41564b2006-03-29 08:55:14 +100030 * By comparing each component, we don't have to worry about extra
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 * endian issues in treating two 32 bit numbers as one 64 bit number
32 */
Andrew Mortona1365642006-01-08 01:04:09 -080033static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034{
35 if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2))
36 return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999;
37
38 if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2))
39 return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999;
40
41 return 0;
42}
43
44#define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
45
46/*
47 * Macros, structures, prototypes for interface to the log manager.
48 */
49
50/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 * Flags to xfs_log_done()
52 */
53#define XFS_LOG_REL_PERM_RESERV 0x1
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055/*
56 * Flags to xfs_log_reserve()
57 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 * XFS_LOG_PERM_RESERV: Permanent reservation. When writes are
59 * performed against this type of reservation, the reservation
60 * is not decreased. Long running transactions should use this.
61 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#define XFS_LOG_PERM_RESERV 0x2
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64/*
65 * Flags to xfs_log_force()
66 *
67 * XFS_LOG_SYNC: Synchronous force in-core log to disk
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 */
69#define XFS_LOG_SYNC 0x1
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71#endif /* __KERNEL__ */
72
73
74/* Log Clients */
75#define XFS_TRANSACTION 0x69
76#define XFS_VOLUME 0x2
77#define XFS_LOG 0xaa
78
Tim Shimmin7e9c6392005-09-02 16:42:05 +100079
80/* Region types for iovec's i_type */
Tim Shimmin7e9c6392005-09-02 16:42:05 +100081#define XLOG_REG_TYPE_BFORMAT 1
82#define XLOG_REG_TYPE_BCHUNK 2
83#define XLOG_REG_TYPE_EFI_FORMAT 3
84#define XLOG_REG_TYPE_EFD_FORMAT 4
85#define XLOG_REG_TYPE_IFORMAT 5
86#define XLOG_REG_TYPE_ICORE 6
87#define XLOG_REG_TYPE_IEXT 7
88#define XLOG_REG_TYPE_IBROOT 8
89#define XLOG_REG_TYPE_ILOCAL 9
90#define XLOG_REG_TYPE_IATTR_EXT 10
91#define XLOG_REG_TYPE_IATTR_BROOT 11
92#define XLOG_REG_TYPE_IATTR_LOCAL 12
93#define XLOG_REG_TYPE_QFORMAT 13
94#define XLOG_REG_TYPE_DQUOT 14
95#define XLOG_REG_TYPE_QUOTAOFF 15
96#define XLOG_REG_TYPE_LRHEADER 16
97#define XLOG_REG_TYPE_UNMOUNT 17
98#define XLOG_REG_TYPE_COMMIT 18
99#define XLOG_REG_TYPE_TRANSHDR 19
100#define XLOG_REG_TYPE_MAX 19
Tim Shimmin7e9c6392005-09-02 16:42:05 +1000101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102typedef struct xfs_log_iovec {
Christoph Hellwig4e0d5f92010-06-23 18:11:15 +1000103 void *i_addr; /* beginning address of region */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 int i_len; /* length in bytes of region */
Tim Shimmin12598452006-01-11 21:02:47 +1100105 uint i_type; /* type of region */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106} xfs_log_iovec_t;
107
Dave Chinner55b66332010-03-23 11:43:17 +1100108struct xfs_log_vec {
109 struct xfs_log_vec *lv_next; /* next lv in build list */
110 int lv_niovecs; /* number of iovecs in lv */
111 struct xfs_log_iovec *lv_iovecp; /* iovec array */
Dave Chinner71e330b2010-05-21 14:37:18 +1000112 struct xfs_log_item *lv_item; /* owner */
113 char *lv_buf; /* formatted buffer */
114 int lv_buf_len; /* size of formatted buffer */
Dave Chinner55b66332010-03-23 11:43:17 +1100115};
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117/*
118 * Structure used to pass callback function and the function's argument
119 * to the log manager.
120 */
121typedef struct xfs_log_callback {
122 struct xfs_log_callback *cb_next;
123 void (*cb_func)(void *, int);
124 void *cb_arg;
125} xfs_log_callback_t;
126
127
128#ifdef __KERNEL__
129/* Log manager interfaces */
130struct xfs_mount;
Christoph Hellwig35a8a722010-02-15 23:34:54 +0000131struct xlog_in_core;
Dave Chinnercc09c0d2008-11-17 17:37:10 +1100132struct xlog_ticket;
Dave Chinner43f5efc2010-03-23 10:10:00 +1100133struct xfs_log_item;
134struct xfs_item_ops;
Dave Chinner955833c2010-05-14 21:41:46 +1000135struct xfs_trans;
Dave Chinner43f5efc2010-03-23 10:10:00 +1100136
137void xfs_log_item_init(struct xfs_mount *mp,
138 struct xfs_log_item *item,
139 int type,
Christoph Hellwig272e42b2011-10-28 09:54:24 +0000140 const struct xfs_item_ops *ops);
Christoph Hellwig35a8a722010-02-15 23:34:54 +0000141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
Christoph Hellwig35a8a722010-02-15 23:34:54 +0000143 struct xlog_ticket *ticket,
144 struct xlog_in_core **iclog,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 uint flags);
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100146int _xfs_log_force(struct xfs_mount *mp,
Christoph Hellwigf538d4d2005-11-02 10:26:59 +1100147 uint flags,
148 int *log_forced);
David Chinnerb911ca02008-04-10 12:24:30 +1000149void xfs_log_force(struct xfs_mount *mp,
David Chinnerb911ca02008-04-10 12:24:30 +1000150 uint flags);
Christoph Hellwiga14a3482010-01-19 09:56:46 +0000151int _xfs_log_force_lsn(struct xfs_mount *mp,
152 xfs_lsn_t lsn,
153 uint flags,
154 int *log_forced);
155void xfs_log_force_lsn(struct xfs_mount *mp,
156 xfs_lsn_t lsn,
157 uint flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158int xfs_log_mount(struct xfs_mount *mp,
159 struct xfs_buftarg *log_target,
160 xfs_daddr_t start_block,
161 int num_bblocks);
Christoph Hellwig42490232008-08-13 16:49:32 +1000162int xfs_log_mount_finish(struct xfs_mount *mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163void xfs_log_move_tail(struct xfs_mount *mp,
164 xfs_lsn_t tail_lsn);
165int xfs_log_notify(struct xfs_mount *mp,
Christoph Hellwig35a8a722010-02-15 23:34:54 +0000166 struct xlog_in_core *iclog,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 xfs_log_callback_t *callback_entry);
168int xfs_log_release_iclog(struct xfs_mount *mp,
Christoph Hellwig35a8a722010-02-15 23:34:54 +0000169 struct xlog_in_core *iclog);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170int xfs_log_reserve(struct xfs_mount *mp,
171 int length,
172 int count,
Christoph Hellwig35a8a722010-02-15 23:34:54 +0000173 struct xlog_ticket **ticket,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 __uint8_t clientid,
Tim Shimmin7e9c6392005-09-02 16:42:05 +1000175 uint flags,
176 uint t_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177int xfs_log_write(struct xfs_mount *mp,
178 xfs_log_iovec_t region[],
179 int nentries,
Christoph Hellwig35a8a722010-02-15 23:34:54 +0000180 struct xlog_ticket *ticket,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 xfs_lsn_t *start_lsn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182int xfs_log_unmount_write(struct xfs_mount *mp);
Christoph Hellwig21b699c2009-03-16 08:19:29 +0100183void xfs_log_unmount(struct xfs_mount *mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
185int xfs_log_need_covered(struct xfs_mount *mp);
186
187void xlog_iodone(struct xfs_buf *);
188
Dave Chinner71e330b2010-05-21 14:37:18 +1000189struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
Dave Chinnercc09c0d2008-11-17 17:37:10 +1100190void xfs_log_ticket_put(struct xlog_ticket *ticket);
191
Dave Chinnerc6f990d2011-01-27 13:23:28 +1100192void xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
Dave Chinner71e330b2010-05-21 14:37:18 +1000193 struct xfs_log_vec *log_vector,
194 xfs_lsn_t *commit_lsn, int flags);
Dave Chinnerccf7c232010-05-20 23:19:42 +1000195bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
Dave Chinner71e330b2010-05-21 14:37:18 +1000196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198#endif /* __XFS_LOG_H__ */