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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)) | |
25 | /* this is used in a spot where we might otherwise double-endian-flip */ | |
26 | #define CYCLE_LSN_DISK(lsn) (((uint *)&(lsn))[0]) | |
27 | ||
28 | #ifdef __KERNEL__ | |
29 | /* | |
30 | * By comparing each compnent, we don't have to worry about extra | |
31 | * endian issues in treating two 32 bit numbers as one 64 bit number | |
32 | */ | |
a1365647 | 33 | static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2) |
1da177e4 LT |
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 | ||
50 | /* | |
51 | * Flags to xfs_log_mount | |
52 | */ | |
53 | #define XFS_LOG_RECOVER 0x1 | |
54 | ||
55 | /* | |
56 | * Flags to xfs_log_done() | |
57 | */ | |
58 | #define XFS_LOG_REL_PERM_RESERV 0x1 | |
59 | ||
60 | ||
61 | /* | |
62 | * Flags to xfs_log_reserve() | |
63 | * | |
64 | * XFS_LOG_SLEEP: If space is not available, sleep (default) | |
65 | * XFS_LOG_NOSLEEP: If space is not available, return error | |
66 | * XFS_LOG_PERM_RESERV: Permanent reservation. When writes are | |
67 | * performed against this type of reservation, the reservation | |
68 | * is not decreased. Long running transactions should use this. | |
69 | */ | |
70 | #define XFS_LOG_SLEEP 0x0 | |
71 | #define XFS_LOG_NOSLEEP 0x1 | |
72 | #define XFS_LOG_PERM_RESERV 0x2 | |
73 | #define XFS_LOG_RESV_ALL (XFS_LOG_NOSLEEP|XFS_LOG_PERM_RESERV) | |
74 | ||
75 | ||
76 | /* | |
77 | * Flags to xfs_log_force() | |
78 | * | |
79 | * XFS_LOG_SYNC: Synchronous force in-core log to disk | |
80 | * XFS_LOG_FORCE: Start in-core log write now. | |
81 | * XFS_LOG_URGE: Start write within some window of time. | |
82 | * | |
83 | * Note: Either XFS_LOG_FORCE or XFS_LOG_URGE must be set. | |
84 | */ | |
85 | #define XFS_LOG_SYNC 0x1 | |
86 | #define XFS_LOG_FORCE 0x2 | |
87 | #define XFS_LOG_URGE 0x4 | |
88 | ||
89 | #endif /* __KERNEL__ */ | |
90 | ||
91 | ||
92 | /* Log Clients */ | |
93 | #define XFS_TRANSACTION 0x69 | |
94 | #define XFS_VOLUME 0x2 | |
95 | #define XFS_LOG 0xaa | |
96 | ||
7e9c6396 TS |
97 | |
98 | /* Region types for iovec's i_type */ | |
7e9c6396 TS |
99 | #define XLOG_REG_TYPE_BFORMAT 1 |
100 | #define XLOG_REG_TYPE_BCHUNK 2 | |
101 | #define XLOG_REG_TYPE_EFI_FORMAT 3 | |
102 | #define XLOG_REG_TYPE_EFD_FORMAT 4 | |
103 | #define XLOG_REG_TYPE_IFORMAT 5 | |
104 | #define XLOG_REG_TYPE_ICORE 6 | |
105 | #define XLOG_REG_TYPE_IEXT 7 | |
106 | #define XLOG_REG_TYPE_IBROOT 8 | |
107 | #define XLOG_REG_TYPE_ILOCAL 9 | |
108 | #define XLOG_REG_TYPE_IATTR_EXT 10 | |
109 | #define XLOG_REG_TYPE_IATTR_BROOT 11 | |
110 | #define XLOG_REG_TYPE_IATTR_LOCAL 12 | |
111 | #define XLOG_REG_TYPE_QFORMAT 13 | |
112 | #define XLOG_REG_TYPE_DQUOT 14 | |
113 | #define XLOG_REG_TYPE_QUOTAOFF 15 | |
114 | #define XLOG_REG_TYPE_LRHEADER 16 | |
115 | #define XLOG_REG_TYPE_UNMOUNT 17 | |
116 | #define XLOG_REG_TYPE_COMMIT 18 | |
117 | #define XLOG_REG_TYPE_TRANSHDR 19 | |
118 | #define XLOG_REG_TYPE_MAX 19 | |
7e9c6396 | 119 | |
7e9c6396 | 120 | #define XLOG_VEC_SET_TYPE(vecp, t) ((vecp)->i_type = (t)) |
7e9c6396 | 121 | |
1da177e4 LT |
122 | typedef struct xfs_log_iovec { |
123 | xfs_caddr_t i_addr; /* beginning address of region */ | |
124 | int i_len; /* length in bytes of region */ | |
1259845d | 125 | uint i_type; /* type of region */ |
1da177e4 LT |
126 | } xfs_log_iovec_t; |
127 | ||
128 | typedef void* xfs_log_ticket_t; | |
129 | ||
130 | /* | |
131 | * Structure used to pass callback function and the function's argument | |
132 | * to the log manager. | |
133 | */ | |
134 | typedef struct xfs_log_callback { | |
135 | struct xfs_log_callback *cb_next; | |
136 | void (*cb_func)(void *, int); | |
137 | void *cb_arg; | |
138 | } xfs_log_callback_t; | |
139 | ||
140 | ||
141 | #ifdef __KERNEL__ | |
142 | /* Log manager interfaces */ | |
143 | struct xfs_mount; | |
144 | xfs_lsn_t xfs_log_done(struct xfs_mount *mp, | |
145 | xfs_log_ticket_t ticket, | |
146 | void **iclog, | |
147 | uint flags); | |
f538d4da CH |
148 | int _xfs_log_force(struct xfs_mount *mp, |
149 | xfs_lsn_t lsn, | |
150 | uint flags, | |
151 | int *log_forced); | |
152 | #define xfs_log_force(mp, lsn, flags) \ | |
153 | _xfs_log_force(mp, lsn, flags, NULL); | |
1da177e4 LT |
154 | int xfs_log_mount(struct xfs_mount *mp, |
155 | struct xfs_buftarg *log_target, | |
156 | xfs_daddr_t start_block, | |
157 | int num_bblocks); | |
158 | int xfs_log_mount_finish(struct xfs_mount *mp, int); | |
159 | void xfs_log_move_tail(struct xfs_mount *mp, | |
160 | xfs_lsn_t tail_lsn); | |
161 | int xfs_log_notify(struct xfs_mount *mp, | |
162 | void *iclog, | |
163 | xfs_log_callback_t *callback_entry); | |
164 | int xfs_log_release_iclog(struct xfs_mount *mp, | |
165 | void *iclog_hndl); | |
166 | int xfs_log_reserve(struct xfs_mount *mp, | |
167 | int length, | |
168 | int count, | |
169 | xfs_log_ticket_t *ticket, | |
170 | __uint8_t clientid, | |
7e9c6396 TS |
171 | uint flags, |
172 | uint t_type); | |
1da177e4 LT |
173 | int xfs_log_write(struct xfs_mount *mp, |
174 | xfs_log_iovec_t region[], | |
175 | int nentries, | |
176 | xfs_log_ticket_t ticket, | |
177 | xfs_lsn_t *start_lsn); | |
178 | int xfs_log_unmount(struct xfs_mount *mp); | |
179 | int xfs_log_unmount_write(struct xfs_mount *mp); | |
180 | void xfs_log_unmount_dealloc(struct xfs_mount *mp); | |
181 | int xfs_log_force_umount(struct xfs_mount *mp, int logerror); | |
182 | int xfs_log_need_covered(struct xfs_mount *mp); | |
183 | ||
184 | void xlog_iodone(struct xfs_buf *); | |
185 | ||
186 | #endif | |
187 | ||
188 | ||
189 | extern int xlog_debug; /* set to 1 to enable real log */ | |
190 | ||
191 | ||
192 | #endif /* __XFS_LOG_H__ */ |