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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_LOG_H__ | |
19 | #define __XFS_LOG_H__ | |
20 | ||
21 | /* get lsn fields */ | |
22 | ||
23 | #define CYCLE_LSN(lsn) ((uint)((lsn)>>32)) | |
24 | #define BLOCK_LSN(lsn) ((uint)(lsn)) | |
b53e675d | 25 | |
1da177e4 | 26 | /* this is used in a spot where we might otherwise double-endian-flip */ |
b53e675d | 27 | #define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0]) |
1da177e4 LT |
28 | |
29 | #ifdef __KERNEL__ | |
30 | /* | |
c41564b5 | 31 | * By comparing each component, we don't have to worry about extra |
1da177e4 LT |
32 | * endian issues in treating two 32 bit numbers as one 64 bit number |
33 | */ | |
a1365647 | 34 | static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) |
1da177e4 LT |
35 | { |
36 | if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2)) | |
37 | return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999; | |
38 | ||
39 | if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2)) | |
40 | return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999; | |
41 | ||
42 | return 0; | |
43 | } | |
44 | ||
45 | #define XFS_LSN_CMP(x,y) _lsn_cmp(x,y) | |
46 | ||
47 | /* | |
48 | * Macros, structures, prototypes for interface to the log manager. | |
49 | */ | |
50 | ||
1da177e4 LT |
51 | /* |
52 | * Flags to xfs_log_done() | |
53 | */ | |
54 | #define XFS_LOG_REL_PERM_RESERV 0x1 | |
55 | ||
1da177e4 LT |
56 | /* |
57 | * Flags to xfs_log_reserve() | |
58 | * | |
59 | * XFS_LOG_SLEEP: If space is not available, sleep (default) | |
60 | * XFS_LOG_NOSLEEP: If space is not available, return error | |
61 | * XFS_LOG_PERM_RESERV: Permanent reservation. When writes are | |
62 | * performed against this type of reservation, the reservation | |
63 | * is not decreased. Long running transactions should use this. | |
64 | */ | |
65 | #define XFS_LOG_SLEEP 0x0 | |
66 | #define XFS_LOG_NOSLEEP 0x1 | |
67 | #define XFS_LOG_PERM_RESERV 0x2 | |
1da177e4 LT |
68 | |
69 | /* | |
70 | * Flags to xfs_log_force() | |
71 | * | |
72 | * XFS_LOG_SYNC: Synchronous force in-core log to disk | |
1da177e4 LT |
73 | */ |
74 | #define XFS_LOG_SYNC 0x1 | |
1da177e4 LT |
75 | |
76 | #endif /* __KERNEL__ */ | |
77 | ||
78 | ||
79 | /* Log Clients */ | |
80 | #define XFS_TRANSACTION 0x69 | |
81 | #define XFS_VOLUME 0x2 | |
82 | #define XFS_LOG 0xaa | |
83 | ||
7e9c6396 TS |
84 | |
85 | /* Region types for iovec's i_type */ | |
7e9c6396 TS |
86 | #define XLOG_REG_TYPE_BFORMAT 1 |
87 | #define XLOG_REG_TYPE_BCHUNK 2 | |
88 | #define XLOG_REG_TYPE_EFI_FORMAT 3 | |
89 | #define XLOG_REG_TYPE_EFD_FORMAT 4 | |
90 | #define XLOG_REG_TYPE_IFORMAT 5 | |
91 | #define XLOG_REG_TYPE_ICORE 6 | |
92 | #define XLOG_REG_TYPE_IEXT 7 | |
93 | #define XLOG_REG_TYPE_IBROOT 8 | |
94 | #define XLOG_REG_TYPE_ILOCAL 9 | |
95 | #define XLOG_REG_TYPE_IATTR_EXT 10 | |
96 | #define XLOG_REG_TYPE_IATTR_BROOT 11 | |
97 | #define XLOG_REG_TYPE_IATTR_LOCAL 12 | |
98 | #define XLOG_REG_TYPE_QFORMAT 13 | |
99 | #define XLOG_REG_TYPE_DQUOT 14 | |
100 | #define XLOG_REG_TYPE_QUOTAOFF 15 | |
101 | #define XLOG_REG_TYPE_LRHEADER 16 | |
102 | #define XLOG_REG_TYPE_UNMOUNT 17 | |
103 | #define XLOG_REG_TYPE_COMMIT 18 | |
104 | #define XLOG_REG_TYPE_TRANSHDR 19 | |
105 | #define XLOG_REG_TYPE_MAX 19 | |
7e9c6396 | 106 | |
1da177e4 | 107 | typedef struct xfs_log_iovec { |
4139b3b3 | 108 | xfs_caddr_t i_addr; /* beginning address of region */ |
1da177e4 | 109 | int i_len; /* length in bytes of region */ |
1259845d | 110 | uint i_type; /* type of region */ |
1da177e4 LT |
111 | } xfs_log_iovec_t; |
112 | ||
1da177e4 LT |
113 | /* |
114 | * Structure used to pass callback function and the function's argument | |
115 | * to the log manager. | |
116 | */ | |
117 | typedef struct xfs_log_callback { | |
118 | struct xfs_log_callback *cb_next; | |
119 | void (*cb_func)(void *, int); | |
120 | void *cb_arg; | |
121 | } xfs_log_callback_t; | |
122 | ||
123 | ||
124 | #ifdef __KERNEL__ | |
125 | /* Log manager interfaces */ | |
126 | struct xfs_mount; | |
35a8a72f | 127 | struct xlog_in_core; |
cc09c0dc | 128 | struct xlog_ticket; |
43f5efc5 DC |
129 | struct xfs_log_item; |
130 | struct xfs_item_ops; | |
131 | ||
132 | void xfs_log_item_init(struct xfs_mount *mp, | |
133 | struct xfs_log_item *item, | |
134 | int type, | |
135 | struct xfs_item_ops *ops); | |
35a8a72f | 136 | |
1da177e4 | 137 | xfs_lsn_t xfs_log_done(struct xfs_mount *mp, |
35a8a72f CH |
138 | struct xlog_ticket *ticket, |
139 | struct xlog_in_core **iclog, | |
1da177e4 | 140 | uint flags); |
f538d4da | 141 | int _xfs_log_force(struct xfs_mount *mp, |
f538d4da CH |
142 | uint flags, |
143 | int *log_forced); | |
b911ca04 | 144 | void xfs_log_force(struct xfs_mount *mp, |
b911ca04 | 145 | uint flags); |
a14a348b CH |
146 | int _xfs_log_force_lsn(struct xfs_mount *mp, |
147 | xfs_lsn_t lsn, | |
148 | uint flags, | |
149 | int *log_forced); | |
150 | void xfs_log_force_lsn(struct xfs_mount *mp, | |
151 | xfs_lsn_t lsn, | |
152 | uint flags); | |
1da177e4 LT |
153 | int xfs_log_mount(struct xfs_mount *mp, |
154 | struct xfs_buftarg *log_target, | |
155 | xfs_daddr_t start_block, | |
156 | int num_bblocks); | |
4249023a | 157 | int xfs_log_mount_finish(struct xfs_mount *mp); |
1da177e4 LT |
158 | void xfs_log_move_tail(struct xfs_mount *mp, |
159 | xfs_lsn_t tail_lsn); | |
160 | int xfs_log_notify(struct xfs_mount *mp, | |
35a8a72f | 161 | struct xlog_in_core *iclog, |
1da177e4 LT |
162 | xfs_log_callback_t *callback_entry); |
163 | int xfs_log_release_iclog(struct xfs_mount *mp, | |
35a8a72f | 164 | struct xlog_in_core *iclog); |
1da177e4 LT |
165 | int xfs_log_reserve(struct xfs_mount *mp, |
166 | int length, | |
167 | int count, | |
35a8a72f | 168 | struct xlog_ticket **ticket, |
1da177e4 | 169 | __uint8_t clientid, |
7e9c6396 TS |
170 | uint flags, |
171 | uint t_type); | |
1da177e4 LT |
172 | int xfs_log_write(struct xfs_mount *mp, |
173 | xfs_log_iovec_t region[], | |
174 | int nentries, | |
35a8a72f | 175 | struct xlog_ticket *ticket, |
1da177e4 | 176 | xfs_lsn_t *start_lsn); |
1da177e4 | 177 | int xfs_log_unmount_write(struct xfs_mount *mp); |
21b699c8 | 178 | void xfs_log_unmount(struct xfs_mount *mp); |
1da177e4 LT |
179 | int xfs_log_force_umount(struct xfs_mount *mp, int logerror); |
180 | int xfs_log_need_covered(struct xfs_mount *mp); | |
181 | ||
182 | void xlog_iodone(struct xfs_buf *); | |
183 | ||
cc09c0dc DC |
184 | struct xlog_ticket * xfs_log_ticket_get(struct xlog_ticket *ticket); |
185 | void xfs_log_ticket_put(struct xlog_ticket *ticket); | |
186 | ||
1da177e4 LT |
187 | #endif |
188 | ||
189 | ||
190 | extern int xlog_debug; /* set to 1 to enable real log */ | |
191 | ||
192 | ||
193 | #endif /* __XFS_LOG_H__ */ |