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-rw-r--r-- | include/linux/ext4_jbd.h | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/include/linux/ext4_jbd.h b/include/linux/ext4_jbd.h deleted file mode 100644 index 3dbf6c779037..000000000000 --- a/include/linux/ext4_jbd.h +++ /dev/null | |||
@@ -1,268 +0,0 @@ | |||
1 | /* | ||
2 | * linux/include/linux/ext4_jbd.h | ||
3 | * | ||
4 | * Written by Stephen C. Tweedie <sct@redhat.com>, 1999 | ||
5 | * | ||
6 | * Copyright 1998--1999 Red Hat corp --- All Rights Reserved | ||
7 | * | ||
8 | * This file is part of the Linux kernel and is made available under | ||
9 | * the terms of the GNU General Public License, version 2, or at your | ||
10 | * option, any later version, incorporated herein by reference. | ||
11 | * | ||
12 | * Ext4-specific journaling extensions. | ||
13 | */ | ||
14 | |||
15 | #ifndef _LINUX_EXT4_JBD_H | ||
16 | #define _LINUX_EXT4_JBD_H | ||
17 | |||
18 | #include <linux/fs.h> | ||
19 | #include <linux/jbd.h> | ||
20 | #include <linux/ext4_fs.h> | ||
21 | |||
22 | #define EXT4_JOURNAL(inode) (EXT4_SB((inode)->i_sb)->s_journal) | ||
23 | |||
24 | /* Define the number of blocks we need to account to a transaction to | ||
25 | * modify one block of data. | ||
26 | * | ||
27 | * We may have to touch one inode, one bitmap buffer, up to three | ||
28 | * indirection blocks, the group and superblock summaries, and the data | ||
29 | * block to complete the transaction. */ | ||
30 | |||
31 | #define EXT4_SINGLEDATA_TRANS_BLOCKS 8U | ||
32 | |||
33 | /* Extended attribute operations touch at most two data buffers, | ||
34 | * two bitmap buffers, and two group summaries, in addition to the inode | ||
35 | * and the superblock, which are already accounted for. */ | ||
36 | |||
37 | #define EXT4_XATTR_TRANS_BLOCKS 6U | ||
38 | |||
39 | /* Define the minimum size for a transaction which modifies data. This | ||
40 | * needs to take into account the fact that we may end up modifying two | ||
41 | * quota files too (one for the group, one for the user quota). The | ||
42 | * superblock only gets updated once, of course, so don't bother | ||
43 | * counting that again for the quota updates. */ | ||
44 | |||
45 | #define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS + \ | ||
46 | EXT4_XATTR_TRANS_BLOCKS - 2 + \ | ||
47 | 2*EXT4_QUOTA_TRANS_BLOCKS(sb)) | ||
48 | |||
49 | /* Delete operations potentially hit one directory's namespace plus an | ||
50 | * entire inode, plus arbitrary amounts of bitmap/indirection data. Be | ||
51 | * generous. We can grow the delete transaction later if necessary. */ | ||
52 | |||
53 | #define EXT4_DELETE_TRANS_BLOCKS(sb) (2 * EXT4_DATA_TRANS_BLOCKS(sb) + 64) | ||
54 | |||
55 | /* Define an arbitrary limit for the amount of data we will anticipate | ||
56 | * writing to any given transaction. For unbounded transactions such as | ||
57 | * write(2) and truncate(2) we can write more than this, but we always | ||
58 | * start off at the maximum transaction size and grow the transaction | ||
59 | * optimistically as we go. */ | ||
60 | |||
61 | #define EXT4_MAX_TRANS_DATA 64U | ||
62 | |||
63 | /* We break up a large truncate or write transaction once the handle's | ||
64 | * buffer credits gets this low, we need either to extend the | ||
65 | * transaction or to start a new one. Reserve enough space here for | ||
66 | * inode, bitmap, superblock, group and indirection updates for at least | ||
67 | * one block, plus two quota updates. Quota allocations are not | ||
68 | * needed. */ | ||
69 | |||
70 | #define EXT4_RESERVE_TRANS_BLOCKS 12U | ||
71 | |||
72 | #define EXT4_INDEX_EXTRA_TRANS_BLOCKS 8 | ||
73 | |||
74 | #ifdef CONFIG_QUOTA | ||
75 | /* Amount of blocks needed for quota update - we know that the structure was | ||
76 | * allocated so we need to update only inode+data */ | ||
77 | #define EXT4_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0) | ||
78 | /* Amount of blocks needed for quota insert/delete - we do some block writes | ||
79 | * but inode, sb and group updates are done only once */ | ||
80 | #define EXT4_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\ | ||
81 | (EXT4_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0) | ||
82 | #define EXT4_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\ | ||
83 | (EXT4_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0) | ||
84 | #else | ||
85 | #define EXT4_QUOTA_TRANS_BLOCKS(sb) 0 | ||
86 | #define EXT4_QUOTA_INIT_BLOCKS(sb) 0 | ||
87 | #define EXT4_QUOTA_DEL_BLOCKS(sb) 0 | ||
88 | #endif | ||
89 | |||
90 | int | ||
91 | ext4_mark_iloc_dirty(handle_t *handle, | ||
92 | struct inode *inode, | ||
93 | struct ext4_iloc *iloc); | ||
94 | |||
95 | /* | ||
96 | * On success, We end up with an outstanding reference count against | ||
97 | * iloc->bh. This _must_ be cleaned up later. | ||
98 | */ | ||
99 | |||
100 | int ext4_reserve_inode_write(handle_t *handle, struct inode *inode, | ||
101 | struct ext4_iloc *iloc); | ||
102 | |||
103 | int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode); | ||
104 | |||
105 | /* | ||
106 | * Wrapper functions with which ext4 calls into JBD. The intent here is | ||
107 | * to allow these to be turned into appropriate stubs so ext4 can control | ||
108 | * ext2 filesystems, so ext2+ext4 systems only nee one fs. This work hasn't | ||
109 | * been done yet. | ||
110 | */ | ||
111 | |||
112 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, | ||
113 | struct buffer_head *bh, handle_t *handle, int err); | ||
114 | |||
115 | static inline int | ||
116 | __ext4_journal_get_undo_access(const char *where, handle_t *handle, | ||
117 | struct buffer_head *bh) | ||
118 | { | ||
119 | int err = journal_get_undo_access(handle, bh); | ||
120 | if (err) | ||
121 | ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err); | ||
122 | return err; | ||
123 | } | ||
124 | |||
125 | static inline int | ||
126 | __ext4_journal_get_write_access(const char *where, handle_t *handle, | ||
127 | struct buffer_head *bh) | ||
128 | { | ||
129 | int err = journal_get_write_access(handle, bh); | ||
130 | if (err) | ||
131 | ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err); | ||
132 | return err; | ||
133 | } | ||
134 | |||
135 | static inline void | ||
136 | ext4_journal_release_buffer(handle_t *handle, struct buffer_head *bh) | ||
137 | { | ||
138 | journal_release_buffer(handle, bh); | ||
139 | } | ||
140 | |||
141 | static inline int | ||
142 | __ext4_journal_forget(const char *where, handle_t *handle, struct buffer_head *bh) | ||
143 | { | ||
144 | int err = journal_forget(handle, bh); | ||
145 | if (err) | ||
146 | ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err); | ||
147 | return err; | ||
148 | } | ||
149 | |||
150 | static inline int | ||
151 | __ext4_journal_revoke(const char *where, handle_t *handle, | ||
152 | unsigned long blocknr, struct buffer_head *bh) | ||
153 | { | ||
154 | int err = journal_revoke(handle, blocknr, bh); | ||
155 | if (err) | ||
156 | ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err); | ||
157 | return err; | ||
158 | } | ||
159 | |||
160 | static inline int | ||
161 | __ext4_journal_get_create_access(const char *where, | ||
162 | handle_t *handle, struct buffer_head *bh) | ||
163 | { | ||
164 | int err = journal_get_create_access(handle, bh); | ||
165 | if (err) | ||
166 | ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err); | ||
167 | return err; | ||
168 | } | ||
169 | |||
170 | static inline int | ||
171 | __ext4_journal_dirty_metadata(const char *where, | ||
172 | handle_t *handle, struct buffer_head *bh) | ||
173 | { | ||
174 | int err = journal_dirty_metadata(handle, bh); | ||
175 | if (err) | ||
176 | ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err); | ||
177 | return err; | ||
178 | } | ||
179 | |||
180 | |||
181 | #define ext4_journal_get_undo_access(handle, bh) \ | ||
182 | __ext4_journal_get_undo_access(__FUNCTION__, (handle), (bh)) | ||
183 | #define ext4_journal_get_write_access(handle, bh) \ | ||
184 | __ext4_journal_get_write_access(__FUNCTION__, (handle), (bh)) | ||
185 | #define ext4_journal_revoke(handle, blocknr, bh) \ | ||
186 | __ext4_journal_revoke(__FUNCTION__, (handle), (blocknr), (bh)) | ||
187 | #define ext4_journal_get_create_access(handle, bh) \ | ||
188 | __ext4_journal_get_create_access(__FUNCTION__, (handle), (bh)) | ||
189 | #define ext4_journal_dirty_metadata(handle, bh) \ | ||
190 | __ext4_journal_dirty_metadata(__FUNCTION__, (handle), (bh)) | ||
191 | #define ext4_journal_forget(handle, bh) \ | ||
192 | __ext4_journal_forget(__FUNCTION__, (handle), (bh)) | ||
193 | |||
194 | int ext4_journal_dirty_data(handle_t *handle, struct buffer_head *bh); | ||
195 | |||
196 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks); | ||
197 | int __ext4_journal_stop(const char *where, handle_t *handle); | ||
198 | |||
199 | static inline handle_t *ext4_journal_start(struct inode *inode, int nblocks) | ||
200 | { | ||
201 | return ext4_journal_start_sb(inode->i_sb, nblocks); | ||
202 | } | ||
203 | |||
204 | #define ext4_journal_stop(handle) \ | ||
205 | __ext4_journal_stop(__FUNCTION__, (handle)) | ||
206 | |||
207 | static inline handle_t *ext4_journal_current_handle(void) | ||
208 | { | ||
209 | return journal_current_handle(); | ||
210 | } | ||
211 | |||
212 | static inline int ext4_journal_extend(handle_t *handle, int nblocks) | ||
213 | { | ||
214 | return journal_extend(handle, nblocks); | ||
215 | } | ||
216 | |||
217 | static inline int ext4_journal_restart(handle_t *handle, int nblocks) | ||
218 | { | ||
219 | return journal_restart(handle, nblocks); | ||
220 | } | ||
221 | |||
222 | static inline int ext4_journal_blocks_per_page(struct inode *inode) | ||
223 | { | ||
224 | return journal_blocks_per_page(inode); | ||
225 | } | ||
226 | |||
227 | static inline int ext4_journal_force_commit(journal_t *journal) | ||
228 | { | ||
229 | return journal_force_commit(journal); | ||
230 | } | ||
231 | |||
232 | /* super.c */ | ||
233 | int ext4_force_commit(struct super_block *sb); | ||
234 | |||
235 | static inline int ext4_should_journal_data(struct inode *inode) | ||
236 | { | ||
237 | if (!S_ISREG(inode->i_mode)) | ||
238 | return 1; | ||
239 | if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | ||
240 | return 1; | ||
241 | if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) | ||
242 | return 1; | ||
243 | return 0; | ||
244 | } | ||
245 | |||
246 | static inline int ext4_should_order_data(struct inode *inode) | ||
247 | { | ||
248 | if (!S_ISREG(inode->i_mode)) | ||
249 | return 0; | ||
250 | if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) | ||
251 | return 0; | ||
252 | if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | ||
253 | return 1; | ||
254 | return 0; | ||
255 | } | ||
256 | |||
257 | static inline int ext4_should_writeback_data(struct inode *inode) | ||
258 | { | ||
259 | if (!S_ISREG(inode->i_mode)) | ||
260 | return 0; | ||
261 | if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) | ||
262 | return 0; | ||
263 | if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | ||
264 | return 1; | ||
265 | return 0; | ||
266 | } | ||
267 | |||
268 | #endif /* _LINUX_EXT4_JBD_H */ | ||