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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 */ | |
1da177e4 LT |
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]) |
1da177e4 LT |
27 | |
28 | #ifdef __KERNEL__ | |
29 | /* | |
c41564b5 | 30 | * By comparing each component, we don't have to worry about extra |
1da177e4 LT |
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 | ||
1da177e4 LT |
50 | /* |
51 | * Flags to xfs_log_done() | |
52 | */ | |
53 | #define XFS_LOG_REL_PERM_RESERV 0x1 | |
54 | ||
1da177e4 LT |
55 | /* |
56 | * Flags to xfs_log_reserve() | |
57 | * | |
1da177e4 LT |
58 | * 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 | */ | |
1da177e4 | 62 | #define XFS_LOG_PERM_RESERV 0x2 |
1da177e4 LT |
63 | |
64 | /* | |
65 | * Flags to xfs_log_force() | |
66 | * | |
67 | * XFS_LOG_SYNC: Synchronous force in-core log to disk | |
1da177e4 LT |
68 | */ |
69 | #define XFS_LOG_SYNC 0x1 | |
1da177e4 LT |
70 | |
71 | #endif /* __KERNEL__ */ | |
72 | ||
73 | ||
74 | /* Log Clients */ | |
75 | #define XFS_TRANSACTION 0x69 | |
76 | #define XFS_VOLUME 0x2 | |
77 | #define XFS_LOG 0xaa | |
78 | ||
7e9c6396 TS |
79 | |
80 | /* Region types for iovec's i_type */ | |
7e9c6396 TS |
81 | #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 | |
7e9c6396 | 101 | |
1da177e4 | 102 | typedef struct xfs_log_iovec { |
4e0d5f92 | 103 | void *i_addr; /* beginning address of region */ |
1da177e4 | 104 | int i_len; /* length in bytes of region */ |
1259845d | 105 | uint i_type; /* type of region */ |
1da177e4 LT |
106 | } xfs_log_iovec_t; |
107 | ||
55b66332 DC |
108 | struct 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 */ | |
71e330b5 DC |
112 | struct xfs_log_item *lv_item; /* owner */ |
113 | char *lv_buf; /* formatted buffer */ | |
114 | int lv_buf_len; /* size of formatted buffer */ | |
55b66332 DC |
115 | }; |
116 | ||
1da177e4 LT |
117 | /* |
118 | * Structure used to pass callback function and the function's argument | |
119 | * to the log manager. | |
120 | */ | |
121 | typedef 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 */ | |
130 | struct xfs_mount; | |
35a8a72f | 131 | struct xlog_in_core; |
cc09c0dc | 132 | struct xlog_ticket; |
43f5efc5 DC |
133 | struct xfs_log_item; |
134 | struct xfs_item_ops; | |
955833cf | 135 | struct xfs_trans; |
43f5efc5 DC |
136 | |
137 | void xfs_log_item_init(struct xfs_mount *mp, | |
138 | struct xfs_log_item *item, | |
139 | int type, | |
272e42b2 | 140 | const struct xfs_item_ops *ops); |
35a8a72f | 141 | |
1da177e4 | 142 | xfs_lsn_t xfs_log_done(struct xfs_mount *mp, |
35a8a72f CH |
143 | struct xlog_ticket *ticket, |
144 | struct xlog_in_core **iclog, | |
1da177e4 | 145 | uint flags); |
f538d4da | 146 | int _xfs_log_force(struct xfs_mount *mp, |
f538d4da CH |
147 | uint flags, |
148 | int *log_forced); | |
b911ca04 | 149 | void xfs_log_force(struct xfs_mount *mp, |
b911ca04 | 150 | uint flags); |
a14a348b CH |
151 | int _xfs_log_force_lsn(struct xfs_mount *mp, |
152 | xfs_lsn_t lsn, | |
153 | uint flags, | |
154 | int *log_forced); | |
155 | void xfs_log_force_lsn(struct xfs_mount *mp, | |
156 | xfs_lsn_t lsn, | |
157 | uint flags); | |
1da177e4 LT |
158 | int xfs_log_mount(struct xfs_mount *mp, |
159 | struct xfs_buftarg *log_target, | |
160 | xfs_daddr_t start_block, | |
161 | int num_bblocks); | |
4249023a | 162 | int xfs_log_mount_finish(struct xfs_mount *mp); |
09a423a3 CH |
163 | xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); |
164 | void xfs_log_space_wake(struct xfs_mount *mp, | |
165 | bool opportunistic); | |
1da177e4 | 166 | int xfs_log_notify(struct xfs_mount *mp, |
35a8a72f | 167 | struct xlog_in_core *iclog, |
1da177e4 LT |
168 | xfs_log_callback_t *callback_entry); |
169 | int xfs_log_release_iclog(struct xfs_mount *mp, | |
35a8a72f | 170 | struct xlog_in_core *iclog); |
1da177e4 LT |
171 | int xfs_log_reserve(struct xfs_mount *mp, |
172 | int length, | |
173 | int count, | |
35a8a72f | 174 | struct xlog_ticket **ticket, |
1da177e4 | 175 | __uint8_t clientid, |
7e9c6396 TS |
176 | uint flags, |
177 | uint t_type); | |
1da177e4 | 178 | int xfs_log_unmount_write(struct xfs_mount *mp); |
21b699c8 | 179 | void xfs_log_unmount(struct xfs_mount *mp); |
1da177e4 LT |
180 | int xfs_log_force_umount(struct xfs_mount *mp, int logerror); |
181 | int xfs_log_need_covered(struct xfs_mount *mp); | |
182 | ||
183 | void xlog_iodone(struct xfs_buf *); | |
184 | ||
71e330b5 | 185 | struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket); |
cc09c0dc DC |
186 | void xfs_log_ticket_put(struct xlog_ticket *ticket); |
187 | ||
0244b960 | 188 | int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp, |
71e330b5 | 189 | xfs_lsn_t *commit_lsn, int flags); |
ccf7c23f | 190 | bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); |
71e330b5 | 191 | |
1da177e4 | 192 | #endif |
1da177e4 | 193 | #endif /* __XFS_LOG_H__ */ |