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1da177e4 1/*
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2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
1da177e4 4 *
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5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
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7 * published by the Free Software Foundation.
8 *
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9 * 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.
1da177e4 13 *
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14 * 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
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17 */
18#ifndef __XFS_LOG_H__
19#define __XFS_LOG_H__
20
21/* get lsn fields */
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22#define CYCLE_LSN(lsn) ((uint)((lsn)>>32))
23#define BLOCK_LSN(lsn) ((uint)(lsn))
b53e675d 24
1da177e4 25/* this is used in a spot where we might otherwise double-endian-flip */
b53e675d 26#define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0])
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27
28#ifdef __KERNEL__
29/*
c41564b5 30 * By comparing each component, we don't have to worry about extra
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31 * endian issues in treating two 32 bit numbers as one 64 bit number
32 */
a1365647 33static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
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34{
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
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50/*
51 * Flags to xfs_log_done()
52 */
53#define XFS_LOG_REL_PERM_RESERV 0x1
54
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55/*
56 * Flags to xfs_log_force()
57 *
58 * XFS_LOG_SYNC: Synchronous force in-core log to disk
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59 */
60#define XFS_LOG_SYNC 0x1
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61
62#endif /* __KERNEL__ */
63
64
65/* Log Clients */
66#define XFS_TRANSACTION 0x69
67#define XFS_VOLUME 0x2
68#define XFS_LOG 0xaa
69
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70
71/* Region types for iovec's i_type */
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72#define XLOG_REG_TYPE_BFORMAT 1
73#define XLOG_REG_TYPE_BCHUNK 2
74#define XLOG_REG_TYPE_EFI_FORMAT 3
75#define XLOG_REG_TYPE_EFD_FORMAT 4
76#define XLOG_REG_TYPE_IFORMAT 5
77#define XLOG_REG_TYPE_ICORE 6
78#define XLOG_REG_TYPE_IEXT 7
79#define XLOG_REG_TYPE_IBROOT 8
80#define XLOG_REG_TYPE_ILOCAL 9
81#define XLOG_REG_TYPE_IATTR_EXT 10
82#define XLOG_REG_TYPE_IATTR_BROOT 11
83#define XLOG_REG_TYPE_IATTR_LOCAL 12
84#define XLOG_REG_TYPE_QFORMAT 13
85#define XLOG_REG_TYPE_DQUOT 14
86#define XLOG_REG_TYPE_QUOTAOFF 15
87#define XLOG_REG_TYPE_LRHEADER 16
88#define XLOG_REG_TYPE_UNMOUNT 17
89#define XLOG_REG_TYPE_COMMIT 18
90#define XLOG_REG_TYPE_TRANSHDR 19
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91#define XLOG_REG_TYPE_ICREATE 20
92#define XLOG_REG_TYPE_MAX 20
7e9c6396 93
1da177e4 94typedef struct xfs_log_iovec {
4e0d5f92 95 void *i_addr; /* beginning address of region */
1da177e4 96 int i_len; /* length in bytes of region */
1259845d 97 uint i_type; /* type of region */
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98} xfs_log_iovec_t;
99
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100struct xfs_log_vec {
101 struct xfs_log_vec *lv_next; /* next lv in build list */
102 int lv_niovecs; /* number of iovecs in lv */
103 struct xfs_log_iovec *lv_iovecp; /* iovec array */
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104 struct xfs_log_item *lv_item; /* owner */
105 char *lv_buf; /* formatted buffer */
106 int lv_buf_len; /* size of formatted buffer */
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107};
108
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DC
109#define XFS_LOG_VEC_ORDERED (-1)
110
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111/*
112 * Structure used to pass callback function and the function's argument
113 * to the log manager.
114 */
115typedef struct xfs_log_callback {
116 struct xfs_log_callback *cb_next;
117 void (*cb_func)(void *, int);
118 void *cb_arg;
119} xfs_log_callback_t;
120
121
122#ifdef __KERNEL__
123/* Log manager interfaces */
124struct xfs_mount;
35a8a72f 125struct xlog_in_core;
cc09c0dc 126struct xlog_ticket;
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127struct xfs_log_item;
128struct xfs_item_ops;
955833cf 129struct xfs_trans;
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130
131void xfs_log_item_init(struct xfs_mount *mp,
132 struct xfs_log_item *item,
133 int type,
272e42b2 134 const struct xfs_item_ops *ops);
35a8a72f 135
1da177e4 136xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
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137 struct xlog_ticket *ticket,
138 struct xlog_in_core **iclog,
1da177e4 139 uint flags);
f538d4da 140int _xfs_log_force(struct xfs_mount *mp,
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CH
141 uint flags,
142 int *log_forced);
b911ca04 143void xfs_log_force(struct xfs_mount *mp,
b911ca04 144 uint flags);
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CH
145int _xfs_log_force_lsn(struct xfs_mount *mp,
146 xfs_lsn_t lsn,
147 uint flags,
148 int *log_forced);
149void xfs_log_force_lsn(struct xfs_mount *mp,
150 xfs_lsn_t lsn,
151 uint flags);
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152int xfs_log_mount(struct xfs_mount *mp,
153 struct xfs_buftarg *log_target,
154 xfs_daddr_t start_block,
155 int num_bblocks);
4249023a 156int xfs_log_mount_finish(struct xfs_mount *mp);
09a423a3 157xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
1c304625 158xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
cfb7cdca 159void xfs_log_space_wake(struct xfs_mount *mp);
1da177e4 160int xfs_log_notify(struct xfs_mount *mp,
35a8a72f 161 struct xlog_in_core *iclog,
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162 xfs_log_callback_t *callback_entry);
163int xfs_log_release_iclog(struct xfs_mount *mp,
35a8a72f 164 struct xlog_in_core *iclog);
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165int xfs_log_reserve(struct xfs_mount *mp,
166 int length,
167 int count,
35a8a72f 168 struct xlog_ticket **ticket,
1da177e4 169 __uint8_t clientid,
9006fb91 170 bool permanent,
7e9c6396 171 uint t_type);
9006fb91 172int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic);
1da177e4 173int xfs_log_unmount_write(struct xfs_mount *mp);
21b699c8 174void xfs_log_unmount(struct xfs_mount *mp);
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175int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
176int xfs_log_need_covered(struct xfs_mount *mp);
177
178void xlog_iodone(struct xfs_buf *);
179
71e330b5 180struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
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181void xfs_log_ticket_put(struct xlog_ticket *ticket);
182
0244b960 183int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
71e330b5 184 xfs_lsn_t *commit_lsn, int flags);
ccf7c23f 185bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
71e330b5 186
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187void xfs_log_work_queue(struct xfs_mount *mp);
188void xfs_log_worker(struct work_struct *work);
c75921a7 189void xfs_log_quiesce(struct xfs_mount *mp);
f661f1e0 190
1da177e4 191#endif
1da177e4 192#endif /* __XFS_LOG_H__ */