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12#ifndef _EXT4_JBD2_H
13#define _EXT4_JBD2_H
14
15#include <linux/fs.h>
16#include <linux/jbd2.h>
17#include "ext4.h"
18
19#define EXT4_JOURNAL(inode) (EXT4_SB((inode)->i_sb)->s_journal)
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32
33#define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \
34 (ext4_has_feature_extents(sb) ? 20U : 8U)
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39
40#define EXT4_XATTR_TRANS_BLOCKS 6U
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47
48#define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \
49 EXT4_XATTR_TRANS_BLOCKS - 2 + \
50 EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
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56
57#define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \
58 EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
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65
66#define EXT4_MAX_TRANS_DATA 64U
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74
75#define EXT4_RESERVE_TRANS_BLOCKS 12U
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83
84#define EXT4_INDEX_EXTRA_TRANS_BLOCKS 12U
85
86#ifdef CONFIG_QUOTA
87
88
89#define EXT4_QUOTA_TRANS_BLOCKS(sb) ((ext4_quota_capable(sb)) ? 1 : 0)
90
91
92#define EXT4_QUOTA_INIT_BLOCKS(sb) ((ext4_quota_capable(sb)) ?\
93 (DQUOT_INIT_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\
94 +3+DQUOT_INIT_REWRITE) : 0)
95
96#define EXT4_QUOTA_DEL_BLOCKS(sb) ((ext4_quota_capable(sb)) ?\
97 (DQUOT_DEL_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\
98 +3+DQUOT_DEL_REWRITE) : 0)
99#else
100#define EXT4_QUOTA_TRANS_BLOCKS(sb) 0
101#define EXT4_QUOTA_INIT_BLOCKS(sb) 0
102#define EXT4_QUOTA_DEL_BLOCKS(sb) 0
103#endif
104#define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
105#define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
106#define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
107
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110
111#define EXT4_HT_MISC 0
112#define EXT4_HT_INODE 1
113#define EXT4_HT_WRITE_PAGE 2
114#define EXT4_HT_MAP_BLOCKS 3
115#define EXT4_HT_DIR 4
116#define EXT4_HT_TRUNCATE 5
117#define EXT4_HT_QUOTA 6
118#define EXT4_HT_RESIZE 7
119#define EXT4_HT_MIGRATE 8
120#define EXT4_HT_MOVE_EXTENTS 9
121#define EXT4_HT_XATTR 10
122#define EXT4_HT_EXT_CONVERT 11
123#define EXT4_HT_MAX 12
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132
133struct ext4_journal_cb_entry {
134
135 struct list_head jce_list;
136
137
138 void (*jce_func)(struct super_block *sb,
139 struct ext4_journal_cb_entry *jce, int error);
140
141
142};
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165static inline void _ext4_journal_callback_add(handle_t *handle,
166 struct ext4_journal_cb_entry *jce)
167{
168
169 list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list);
170}
171
172static inline void ext4_journal_callback_add(handle_t *handle,
173 void (*func)(struct super_block *sb,
174 struct ext4_journal_cb_entry *jce,
175 int rc),
176 struct ext4_journal_cb_entry *jce)
177{
178 struct ext4_sb_info *sbi =
179 EXT4_SB(handle->h_transaction->t_journal->j_private);
180
181
182 jce->jce_func = func;
183 spin_lock(&sbi->s_md_lock);
184 _ext4_journal_callback_add(handle, jce);
185 spin_unlock(&sbi->s_md_lock);
186}
187
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193
194
195static inline bool ext4_journal_callback_try_del(handle_t *handle,
196 struct ext4_journal_cb_entry *jce)
197{
198 bool deleted;
199 struct ext4_sb_info *sbi =
200 EXT4_SB(handle->h_transaction->t_journal->j_private);
201
202 spin_lock(&sbi->s_md_lock);
203 deleted = !list_empty(&jce->jce_list);
204 list_del_init(&jce->jce_list);
205 spin_unlock(&sbi->s_md_lock);
206 return deleted;
207}
208
209int
210ext4_mark_iloc_dirty(handle_t *handle,
211 struct inode *inode,
212 struct ext4_iloc *iloc);
213
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217
218
219int ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
220 struct ext4_iloc *iloc);
221
222#define ext4_mark_inode_dirty(__h, __i) \
223 __ext4_mark_inode_dirty((__h), (__i), __func__, __LINE__)
224int __ext4_mark_inode_dirty(handle_t *handle, struct inode *inode,
225 const char *func, unsigned int line);
226
227int ext4_expand_extra_isize(struct inode *inode,
228 unsigned int new_extra_isize,
229 struct ext4_iloc *iloc);
230
231
232
233int __ext4_journal_get_write_access(const char *where, unsigned int line,
234 handle_t *handle, struct super_block *sb,
235 struct buffer_head *bh,
236 enum ext4_journal_trigger_type trigger_type);
237
238int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
239 int is_metadata, struct inode *inode,
240 struct buffer_head *bh, ext4_fsblk_t blocknr);
241
242int __ext4_journal_get_create_access(const char *where, unsigned int line,
243 handle_t *handle, struct super_block *sb,
244 struct buffer_head *bh,
245 enum ext4_journal_trigger_type trigger_type);
246
247int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
248 handle_t *handle, struct inode *inode,
249 struct buffer_head *bh);
250
251#define ext4_journal_get_write_access(handle, sb, bh, trigger_type) \
252 __ext4_journal_get_write_access(__func__, __LINE__, (handle), (sb), \
253 (bh), (trigger_type))
254#define ext4_forget(handle, is_metadata, inode, bh, block_nr) \
255 __ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \
256 (bh), (block_nr))
257#define ext4_journal_get_create_access(handle, sb, bh, trigger_type) \
258 __ext4_journal_get_create_access(__func__, __LINE__, (handle), (sb), \
259 (bh), (trigger_type))
260#define ext4_handle_dirty_metadata(handle, inode, bh) \
261 __ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \
262 (bh))
263
264handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
265 int type, int blocks, int rsv_blocks,
266 int revoke_creds);
267int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle);
268
269#define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096)
270
271
272
273static inline int ext4_handle_valid(handle_t *handle)
274{
275 if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT)
276 return 0;
277 return 1;
278}
279
280static inline void ext4_handle_sync(handle_t *handle)
281{
282 if (ext4_handle_valid(handle))
283 handle->h_sync = 1;
284}
285
286static inline int ext4_handle_is_aborted(handle_t *handle)
287{
288 if (ext4_handle_valid(handle))
289 return is_handle_aborted(handle);
290 return 0;
291}
292
293static inline int ext4_free_metadata_revoke_credits(struct super_block *sb,
294 int blocks)
295{
296
297 return blocks * EXT4_SB(sb)->s_cluster_ratio;
298}
299
300static inline int ext4_trans_default_revoke_credits(struct super_block *sb)
301{
302 return ext4_free_metadata_revoke_credits(sb, 8);
303}
304
305#define ext4_journal_start_sb(sb, type, nblocks) \
306 __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0, \
307 ext4_trans_default_revoke_credits(sb))
308
309#define ext4_journal_start(inode, type, nblocks) \
310 __ext4_journal_start((inode), __LINE__, (type), (nblocks), 0, \
311 ext4_trans_default_revoke_credits((inode)->i_sb))
312
313#define ext4_journal_start_with_reserve(inode, type, blocks, rsv_blocks)\
314 __ext4_journal_start((inode), __LINE__, (type), (blocks), (rsv_blocks),\
315 ext4_trans_default_revoke_credits((inode)->i_sb))
316
317#define ext4_journal_start_with_revoke(inode, type, blocks, revoke_creds) \
318 __ext4_journal_start((inode), __LINE__, (type), (blocks), 0, \
319 (revoke_creds))
320
321static inline handle_t *__ext4_journal_start(struct inode *inode,
322 unsigned int line, int type,
323 int blocks, int rsv_blocks,
324 int revoke_creds)
325{
326 return __ext4_journal_start_sb(inode->i_sb, line, type, blocks,
327 rsv_blocks, revoke_creds);
328}
329
330#define ext4_journal_stop(handle) \
331 __ext4_journal_stop(__func__, __LINE__, (handle))
332
333#define ext4_journal_start_reserved(handle, type) \
334 __ext4_journal_start_reserved((handle), __LINE__, (type))
335
336handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
337 int type);
338
339static inline handle_t *ext4_journal_current_handle(void)
340{
341 return journal_current_handle();
342}
343
344static inline int ext4_journal_extend(handle_t *handle, int nblocks, int revoke)
345{
346 if (ext4_handle_valid(handle))
347 return jbd2_journal_extend(handle, nblocks, revoke);
348 return 0;
349}
350
351static inline int ext4_journal_restart(handle_t *handle, int nblocks,
352 int revoke)
353{
354 if (ext4_handle_valid(handle))
355 return jbd2__journal_restart(handle, nblocks, revoke, GFP_NOFS);
356 return 0;
357}
358
359int __ext4_journal_ensure_credits(handle_t *handle, int check_cred,
360 int extend_cred, int revoke_cred);
361
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372
373#define ext4_journal_ensure_credits_fn(handle, check_cred, extend_cred, \
374 revoke_cred, fn) \
375({ \
376 __label__ __ensure_end; \
377 int err = __ext4_journal_ensure_credits((handle), (check_cred), \
378 (extend_cred), (revoke_cred)); \
379 \
380 if (err <= 0) \
381 goto __ensure_end; \
382 err = (fn); \
383 if (err < 0) \
384 goto __ensure_end; \
385 err = ext4_journal_restart((handle), (extend_cred), (revoke_cred)); \
386 if (err == 0) \
387 err = 1; \
388__ensure_end: \
389 err; \
390})
391
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397
398
399static inline int ext4_journal_ensure_credits(handle_t *handle, int credits,
400 int revoke_creds)
401{
402 return ext4_journal_ensure_credits_fn(handle, credits, credits,
403 revoke_creds, 0);
404}
405
406static inline int ext4_journal_blocks_per_page(struct inode *inode)
407{
408 if (EXT4_JOURNAL(inode) != NULL)
409 return jbd2_journal_blocks_per_page(inode);
410 return 0;
411}
412
413static inline int ext4_journal_force_commit(journal_t *journal)
414{
415 if (journal)
416 return jbd2_journal_force_commit(journal);
417 return 0;
418}
419
420static inline int ext4_jbd2_inode_add_write(handle_t *handle,
421 struct inode *inode, loff_t start_byte, loff_t length)
422{
423 if (ext4_handle_valid(handle))
424 return jbd2_journal_inode_ranged_write(handle,
425 EXT4_I(inode)->jinode, start_byte, length);
426 return 0;
427}
428
429static inline int ext4_jbd2_inode_add_wait(handle_t *handle,
430 struct inode *inode, loff_t start_byte, loff_t length)
431{
432 if (ext4_handle_valid(handle))
433 return jbd2_journal_inode_ranged_wait(handle,
434 EXT4_I(inode)->jinode, start_byte, length);
435 return 0;
436}
437
438static inline void ext4_update_inode_fsync_trans(handle_t *handle,
439 struct inode *inode,
440 int datasync)
441{
442 struct ext4_inode_info *ei = EXT4_I(inode);
443
444 if (ext4_handle_valid(handle) && !is_handle_aborted(handle)) {
445 ei->i_sync_tid = handle->h_transaction->t_tid;
446 if (datasync)
447 ei->i_datasync_tid = handle->h_transaction->t_tid;
448 }
449}
450
451
452int ext4_force_commit(struct super_block *sb);
453
454
455
456
457#define EXT4_INODE_JOURNAL_DATA_MODE 0x01
458#define EXT4_INODE_ORDERED_DATA_MODE 0x02
459#define EXT4_INODE_WRITEBACK_DATA_MODE 0x04
460
461int ext4_inode_journal_mode(struct inode *inode);
462
463static inline int ext4_should_journal_data(struct inode *inode)
464{
465 return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE;
466}
467
468static inline int ext4_should_order_data(struct inode *inode)
469{
470 return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE;
471}
472
473static inline int ext4_should_writeback_data(struct inode *inode)
474{
475 return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE;
476}
477
478static inline int ext4_free_data_revoke_credits(struct inode *inode, int blocks)
479{
480 if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
481 return 0;
482 if (!ext4_should_journal_data(inode))
483 return 0;
484
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487
488 return blocks + 2*(EXT4_SB(inode->i_sb)->s_cluster_ratio - 1);
489}
490
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500static inline int ext4_should_dioread_nolock(struct inode *inode)
501{
502 if (!test_opt(inode->i_sb, DIOREAD_NOLOCK))
503 return 0;
504 if (!S_ISREG(inode->i_mode))
505 return 0;
506 if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
507 return 0;
508 if (ext4_should_journal_data(inode))
509 return 0;
510
511 if (!test_opt(inode->i_sb, DELALLOC))
512 return 0;
513 return 1;
514}
515
516#endif
517