aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/ext4_jbd2.h
diff options
context:
space:
mode:
authorDave Kleikamp <shaggy@austin.ibm.com>2006-10-11 04:20:57 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-11 14:14:15 -0400
commit470decc613ab2048b619a01028072d932d9086ee (patch)
tree5268576f5099040db94b8e984983c0bb28b2a9a7 /include/linux/ext4_jbd2.h
parent02ea2104c55b625cf5b5d9ba8586a4fc17920f5c (diff)
[PATCH] jbd2: initial copy of files from jbd
This is a simple copy of the files in fs/jbd to fs/jbd2 and /usr/incude/linux/[ext4_]jbd.h to /usr/include/[ext4_]jbd2.h Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/ext4_jbd2.h')
-rw-r--r--include/linux/ext4_jbd2.h268
1 files changed, 268 insertions, 0 deletions
diff --git a/include/linux/ext4_jbd2.h b/include/linux/ext4_jbd2.h
new file mode 100644
index 000000000000..3dbf6c779037
--- /dev/null
+++ b/include/linux/ext4_jbd2.h
@@ -0,0 +1,268 @@
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
90int
91ext4_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
100int ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
101 struct ext4_iloc *iloc);
102
103int 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
112void ext4_journal_abort_handle(const char *caller, const char *err_fn,
113 struct buffer_head *bh, handle_t *handle, int err);
114
115static 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
125static 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
135static inline void
136ext4_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
137{
138 journal_release_buffer(handle, bh);
139}
140
141static 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
150static 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
160static 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
170static 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
194int ext4_journal_dirty_data(handle_t *handle, struct buffer_head *bh);
195
196handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks);
197int __ext4_journal_stop(const char *where, handle_t *handle);
198
199static 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
207static inline handle_t *ext4_journal_current_handle(void)
208{
209 return journal_current_handle();
210}
211
212static inline int ext4_journal_extend(handle_t *handle, int nblocks)
213{
214 return journal_extend(handle, nblocks);
215}
216
217static inline int ext4_journal_restart(handle_t *handle, int nblocks)
218{
219 return journal_restart(handle, nblocks);
220}
221
222static inline int ext4_journal_blocks_per_page(struct inode *inode)
223{
224 return journal_blocks_per_page(inode);
225}
226
227static inline int ext4_journal_force_commit(journal_t *journal)
228{
229 return journal_force_commit(journal);
230}
231
232/* super.c */
233int ext4_force_commit(struct super_block *sb);
234
235static 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
246static 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
257static 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 */