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1 : : // SPDX-License-Identifier: GPL-2.0+
2 : : /*
3 : : * ext4_jbd2.h
4 : : *
5 : : * Written by Stephen C. Tweedie <sct@redhat.com>, 1999
6 : : *
7 : : * Copyright 1998--1999 Red Hat corp --- All Rights Reserved
8 : : *
9 : : * Ext4-specific journaling extensions.
10 : : */
11 : :
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)
20 : :
21 : : /* Define the number of blocks we need to account to a transaction to
22 : : * modify one block of data.
23 : : *
24 : : * We may have to touch one inode, one bitmap buffer, up to three
25 : : * indirection blocks, the group and superblock summaries, and the data
26 : : * block to complete the transaction.
27 : : *
28 : : * For extents-enabled fs we may have to allocate and modify up to
29 : : * 5 levels of tree, data block (for each of these we need bitmap + group
30 : : * summaries), root which is stored in the inode, sb
31 : : */
32 : :
33 : : #define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \
34 : : (ext4_has_feature_extents(sb) ? 20U : 8U)
35 : :
36 : : /* Extended attribute operations touch at most two data buffers,
37 : : * two bitmap buffers, and two group summaries, in addition to the inode
38 : : * and the superblock, which are already accounted for. */
39 : :
40 : : #define EXT4_XATTR_TRANS_BLOCKS 6U
41 : :
42 : : /* Define the minimum size for a transaction which modifies data. This
43 : : * needs to take into account the fact that we may end up modifying two
44 : : * quota files too (one for the group, one for the user quota). The
45 : : * superblock only gets updated once, of course, so don't bother
46 : : * counting that again for the quota updates. */
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))
51 : :
52 : : /*
53 : : * Define the number of metadata blocks we need to account to modify data.
54 : : *
55 : : * This include super block, inode block, quota blocks and xattr blocks
56 : : */
57 : : #define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \
58 : : EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
59 : :
60 : : /* Define an arbitrary limit for the amount of data we will anticipate
61 : : * writing to any given transaction. For unbounded transactions such as
62 : : * write(2) and truncate(2) we can write more than this, but we always
63 : : * start off at the maximum transaction size and grow the transaction
64 : : * optimistically as we go. */
65 : :
66 : : #define EXT4_MAX_TRANS_DATA 64U
67 : :
68 : : /* We break up a large truncate or write transaction once the handle's
69 : : * buffer credits gets this low, we need either to extend the
70 : : * transaction or to start a new one. Reserve enough space here for
71 : : * inode, bitmap, superblock, group and indirection updates for at least
72 : : * one block, plus two quota updates. Quota allocations are not
73 : : * needed. */
74 : :
75 : : #define EXT4_RESERVE_TRANS_BLOCKS 12U
76 : :
77 : : /*
78 : : * Number of credits needed if we need to insert an entry into a
79 : : * directory. For each new index block, we need 4 blocks (old index
80 : : * block, new index block, bitmap block, bg summary). For normal
81 : : * htree directories there are 2 levels; if the largedir feature
82 : : * enabled it's 3 levels.
83 : : */
84 : : #define EXT4_INDEX_EXTRA_TRANS_BLOCKS 12U
85 : :
86 : : #ifdef CONFIG_QUOTA
87 : : /* Amount of blocks needed for quota update - we know that the structure was
88 : : * allocated so we need to update only data block */
89 : : #define EXT4_QUOTA_TRANS_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\
90 : : ext4_has_feature_quota(sb)) ? 1 : 0)
91 : : /* Amount of blocks needed for quota insert/delete - we do some block writes
92 : : * but inode, sb and group updates are done only once */
93 : : #define EXT4_QUOTA_INIT_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\
94 : : ext4_has_feature_quota(sb)) ?\
95 : : (DQUOT_INIT_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\
96 : : +3+DQUOT_INIT_REWRITE) : 0)
97 : :
98 : : #define EXT4_QUOTA_DEL_BLOCKS(sb) ((test_opt(sb, QUOTA) ||\
99 : : ext4_has_feature_quota(sb)) ?\
100 : : (DQUOT_DEL_ALLOC*(EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)\
101 : : +3+DQUOT_DEL_REWRITE) : 0)
102 : : #else
103 : : #define EXT4_QUOTA_TRANS_BLOCKS(sb) 0
104 : : #define EXT4_QUOTA_INIT_BLOCKS(sb) 0
105 : : #define EXT4_QUOTA_DEL_BLOCKS(sb) 0
106 : : #endif
107 : : #define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
108 : : #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
109 : : #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
110 : :
111 : : /*
112 : : * Ext4 handle operation types -- for logging purposes
113 : : */
114 : : #define EXT4_HT_MISC 0
115 : : #define EXT4_HT_INODE 1
116 : : #define EXT4_HT_WRITE_PAGE 2
117 : : #define EXT4_HT_MAP_BLOCKS 3
118 : : #define EXT4_HT_DIR 4
119 : : #define EXT4_HT_TRUNCATE 5
120 : : #define EXT4_HT_QUOTA 6
121 : : #define EXT4_HT_RESIZE 7
122 : : #define EXT4_HT_MIGRATE 8
123 : : #define EXT4_HT_MOVE_EXTENTS 9
124 : : #define EXT4_HT_XATTR 10
125 : : #define EXT4_HT_EXT_CONVERT 11
126 : : #define EXT4_HT_MAX 12
127 : :
128 : : /**
129 : : * struct ext4_journal_cb_entry - Base structure for callback information.
130 : : *
131 : : * This struct is a 'seed' structure for a using with your own callback
132 : : * structs. If you are using callbacks you must allocate one of these
133 : : * or another struct of your own definition which has this struct
134 : : * as it's first element and pass it to ext4_journal_callback_add().
135 : : */
136 : : struct ext4_journal_cb_entry {
137 : : /* list information for other callbacks attached to the same handle */
138 : : struct list_head jce_list;
139 : :
140 : : /* Function to call with this callback structure */
141 : : void (*jce_func)(struct super_block *sb,
142 : : struct ext4_journal_cb_entry *jce, int error);
143 : :
144 : : /* user data goes here */
145 : : };
146 : :
147 : : /**
148 : : * ext4_journal_callback_add: add a function to call after transaction commit
149 : : * @handle: active journal transaction handle to register callback on
150 : : * @func: callback function to call after the transaction has committed:
151 : : * @sb: superblock of current filesystem for transaction
152 : : * @jce: returned journal callback data
153 : : * @rc: journal state at commit (0 = transaction committed properly)
154 : : * @jce: journal callback data (internal and function private data struct)
155 : : *
156 : : * The registered function will be called in the context of the journal thread
157 : : * after the transaction for which the handle was created has completed.
158 : : *
159 : : * No locks are held when the callback function is called, so it is safe to
160 : : * call blocking functions from within the callback, but the callback should
161 : : * not block or run for too long, or the filesystem will be blocked waiting for
162 : : * the next transaction to commit. No journaling functions can be used, or
163 : : * there is a risk of deadlock.
164 : : *
165 : : * There is no guaranteed calling order of multiple registered callbacks on
166 : : * the same transaction.
167 : : */
168 : : static inline void _ext4_journal_callback_add(handle_t *handle,
169 : : struct ext4_journal_cb_entry *jce)
170 : : {
171 : : /* Add the jce to transaction's private list */
172 : : list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list);
173 : : }
174 : :
175 : : static inline void ext4_journal_callback_add(handle_t *handle,
176 : : void (*func)(struct super_block *sb,
177 : : struct ext4_journal_cb_entry *jce,
178 : : int rc),
179 : : struct ext4_journal_cb_entry *jce)
180 : : {
181 : : struct ext4_sb_info *sbi =
182 : : EXT4_SB(handle->h_transaction->t_journal->j_private);
183 : :
184 : : /* Add the jce to transaction's private list */
185 : : jce->jce_func = func;
186 : : spin_lock(&sbi->s_md_lock);
187 : : _ext4_journal_callback_add(handle, jce);
188 : : spin_unlock(&sbi->s_md_lock);
189 : : }
190 : :
191 : :
192 : : /**
193 : : * ext4_journal_callback_del: delete a registered callback
194 : : * @handle: active journal transaction handle on which callback was registered
195 : : * @jce: registered journal callback entry to unregister
196 : : * Return true if object was successfully removed
197 : : */
198 : : static inline bool ext4_journal_callback_try_del(handle_t *handle,
199 : : struct ext4_journal_cb_entry *jce)
200 : : {
201 : : bool deleted;
202 : : struct ext4_sb_info *sbi =
203 : : EXT4_SB(handle->h_transaction->t_journal->j_private);
204 : :
205 : : spin_lock(&sbi->s_md_lock);
206 : : deleted = !list_empty(&jce->jce_list);
207 : : list_del_init(&jce->jce_list);
208 : : spin_unlock(&sbi->s_md_lock);
209 : : return deleted;
210 : : }
211 : :
212 : : int
213 : : ext4_mark_iloc_dirty(handle_t *handle,
214 : : struct inode *inode,
215 : : struct ext4_iloc *iloc);
216 : :
217 : : /*
218 : : * On success, We end up with an outstanding reference count against
219 : : * iloc->bh. This _must_ be cleaned up later.
220 : : */
221 : :
222 : : int ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
223 : : struct ext4_iloc *iloc);
224 : :
225 : : int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode);
226 : :
227 : : int ext4_expand_extra_isize(struct inode *inode,
228 : : unsigned int new_extra_isize,
229 : : struct ext4_iloc *iloc);
230 : : /*
231 : : * Wrapper functions with which ext4 calls into JBD.
232 : : */
233 : : int __ext4_journal_get_write_access(const char *where, unsigned int line,
234 : : handle_t *handle, struct buffer_head *bh);
235 : :
236 : : int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
237 : : int is_metadata, struct inode *inode,
238 : : struct buffer_head *bh, ext4_fsblk_t blocknr);
239 : :
240 : : int __ext4_journal_get_create_access(const char *where, unsigned int line,
241 : : handle_t *handle, struct buffer_head *bh);
242 : :
243 : : int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
244 : : handle_t *handle, struct inode *inode,
245 : : struct buffer_head *bh);
246 : :
247 : : int __ext4_handle_dirty_super(const char *where, unsigned int line,
248 : : handle_t *handle, struct super_block *sb);
249 : :
250 : : #define ext4_journal_get_write_access(handle, bh) \
251 : : __ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh))
252 : : #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \
253 : : __ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \
254 : : (bh), (block_nr))
255 : : #define ext4_journal_get_create_access(handle, bh) \
256 : : __ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh))
257 : : #define ext4_handle_dirty_metadata(handle, inode, bh) \
258 : : __ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \
259 : : (bh))
260 : : #define ext4_handle_dirty_super(handle, sb) \
261 : : __ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb))
262 : :
263 : : handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
264 : : int type, int blocks, int rsv_blocks,
265 : : int revoke_creds);
266 : : int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle);
267 : :
268 : : #define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096)
269 : :
270 : : /* Note: Do not use this for NULL handles. This is only to determine if
271 : : * a properly allocated handle is using a journal or not. */
272 : 331406 : static inline int ext4_handle_valid(handle_t *handle)
273 : : {
274 [ + - + + : 262214 : if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT)
+ - + - +
- + - + -
+ - ]
275 [ # # # # : 0 : return 0;
# # # # ]
276 : : return 1;
277 : : }
278 : :
279 : 0 : static inline void ext4_handle_sync(handle_t *handle)
280 : : {
281 [ # # # # : 0 : if (ext4_handle_valid(handle))
# # # # #
# # # #
# ]
282 : 0 : handle->h_sync = 1;
283 : : }
284 : :
285 : 0 : static inline int ext4_handle_is_aborted(handle_t *handle)
286 : : {
287 [ # # # # ]: 0 : if (ext4_handle_valid(handle))
288 [ # # # # ]: 0 : return is_handle_aborted(handle);
289 : : return 0;
290 : : }
291 : :
292 : 41518 : static inline int ext4_free_metadata_revoke_credits(struct super_block *sb,
293 : : int blocks)
294 : : {
295 : : /* Freeing each metadata block can result in freeing one cluster */
296 [ - - ]: 41388 : return blocks * EXT4_SB(sb)->s_cluster_ratio;
297 : : }
298 : :
299 : 41128 : static inline int ext4_trans_default_revoke_credits(struct super_block *sb)
300 : : {
301 [ - - + - : 41128 : return ext4_free_metadata_revoke_credits(sb, 8);
- + - - -
+ ]
302 : : }
303 : :
304 : : #define ext4_journal_start_sb(sb, type, nblocks) \
305 : : __ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0, \
306 : : ext4_trans_default_revoke_credits(sb))
307 : :
308 : : #define ext4_journal_start(inode, type, nblocks) \
309 : : __ext4_journal_start((inode), __LINE__, (type), (nblocks), 0, \
310 : : ext4_trans_default_revoke_credits((inode)->i_sb))
311 : :
312 : : #define ext4_journal_start_with_reserve(inode, type, blocks, rsv_blocks)\
313 : : __ext4_journal_start((inode), __LINE__, (type), (blocks), (rsv_blocks),\
314 : : ext4_trans_default_revoke_credits((inode)->i_sb))
315 : :
316 : : #define ext4_journal_start_with_revoke(inode, type, blocks, revoke_creds) \
317 : : __ext4_journal_start((inode), __LINE__, (type), (blocks), 0, \
318 : : (revoke_creds))
319 : :
320 : 32288 : static inline handle_t *__ext4_journal_start(struct inode *inode,
321 : : unsigned int line, int type,
322 : : int blocks, int rsv_blocks,
323 : : int revoke_creds)
324 : : {
325 : 32288 : return __ext4_journal_start_sb(inode->i_sb, line, type, blocks,
326 : : rsv_blocks, revoke_creds);
327 : : }
328 : :
329 : : #define ext4_journal_stop(handle) \
330 : : __ext4_journal_stop(__func__, __LINE__, (handle))
331 : :
332 : : #define ext4_journal_start_reserved(handle, type) \
333 : : __ext4_journal_start_reserved((handle), __LINE__, (type))
334 : :
335 : : handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
336 : : int type);
337 : :
338 : : static inline void ext4_journal_free_reserved(handle_t *handle)
339 : : {
340 : : if (ext4_handle_valid(handle))
341 : : jbd2_journal_free_reserved(handle);
342 : : }
343 : :
344 : 20813 : static inline handle_t *ext4_journal_current_handle(void)
345 : : {
346 [ - + - + : 20813 : return journal_current_handle();
- - - - +
- ]
347 : : }
348 : :
349 : 0 : static inline int ext4_journal_extend(handle_t *handle, int nblocks, int revoke)
350 : : {
351 [ # # ]: 0 : if (ext4_handle_valid(handle))
352 : 0 : return jbd2_journal_extend(handle, nblocks, revoke);
353 : : return 0;
354 : : }
355 : :
356 : 0 : static inline int ext4_journal_restart(handle_t *handle, int nblocks,
357 : : int revoke)
358 : : {
359 [ # # ]: 0 : if (ext4_handle_valid(handle))
360 : 0 : return jbd2__journal_restart(handle, nblocks, revoke, GFP_NOFS);
361 : : return 0;
362 : : }
363 : :
364 : : int __ext4_journal_ensure_credits(handle_t *handle, int check_cred,
365 : : int extend_cred, int revoke_cred);
366 : :
367 : :
368 : : /*
369 : : * Ensure @handle has at least @check_creds credits available. If not,
370 : : * transaction will be extended or restarted to contain at least @extend_cred
371 : : * credits. Before restarting transaction @fn is executed to allow for cleanup
372 : : * before the transaction is restarted.
373 : : *
374 : : * The return value is < 0 in case of error, 0 in case the handle has enough
375 : : * credits or transaction extension succeeded, 1 in case transaction had to be
376 : : * restarted.
377 : : */
378 : : #define ext4_journal_ensure_credits_fn(handle, check_cred, extend_cred, \
379 : : revoke_cred, fn) \
380 : : ({ \
381 : : __label__ __ensure_end; \
382 : : int err = __ext4_journal_ensure_credits((handle), (check_cred), \
383 : : (extend_cred), (revoke_cred)); \
384 : : \
385 : : if (err <= 0) \
386 : : goto __ensure_end; \
387 : : err = (fn); \
388 : : if (err < 0) \
389 : : goto __ensure_end; \
390 : : err = ext4_journal_restart((handle), (extend_cred), (revoke_cred)); \
391 : : if (err == 0) \
392 : : err = 1; \
393 : : __ensure_end: \
394 : : err; \
395 : : })
396 : :
397 : : /*
398 : : * Ensure given handle has at least requested amount of credits available,
399 : : * possibly restarting transaction if needed. We also make sure the transaction
400 : : * has space for at least ext4_trans_default_revoke_credits(sb) revoke records
401 : : * as freeing one or two blocks is very common pattern and requesting this is
402 : : * very cheap.
403 : : */
404 : 130 : static inline int ext4_journal_ensure_credits(handle_t *handle, int credits,
405 : : int revoke_creds)
406 : : {
407 [ + - - - : 130 : return ext4_journal_ensure_credits_fn(handle, credits, credits,
- - ]
408 : : revoke_creds, 0);
409 : : }
410 : :
411 : 338 : static inline int ext4_journal_blocks_per_page(struct inode *inode)
412 : : {
413 [ + - + - ]: 338 : if (EXT4_JOURNAL(inode) != NULL)
414 : 338 : return jbd2_journal_blocks_per_page(inode);
415 : : return 0;
416 : : }
417 : :
418 : 91 : static inline int ext4_journal_force_commit(journal_t *journal)
419 : : {
420 [ + - ]: 91 : if (journal)
421 : 91 : return jbd2_journal_force_commit(journal);
422 : : return 0;
423 : : }
424 : :
425 : 0 : static inline int ext4_jbd2_inode_add_write(handle_t *handle,
426 : : struct inode *inode, loff_t start_byte, loff_t length)
427 : : {
428 [ # # # # ]: 0 : if (ext4_handle_valid(handle))
429 : 0 : return jbd2_journal_inode_ranged_write(handle,
430 : : EXT4_I(inode)->jinode, start_byte, length);
431 : : return 0;
432 : : }
433 : :
434 : 0 : static inline int ext4_jbd2_inode_add_wait(handle_t *handle,
435 : : struct inode *inode, loff_t start_byte, loff_t length)
436 : : {
437 [ # # ]: 0 : if (ext4_handle_valid(handle))
438 : 0 : return jbd2_journal_inode_ranged_wait(handle,
439 : : EXT4_I(inode)->jinode, start_byte, length);
440 : : return 0;
441 : : }
442 : :
443 : 69192 : static inline void ext4_update_inode_fsync_trans(handle_t *handle,
444 : : struct inode *inode,
445 : : int datasync)
446 : : {
447 [ - - + - : 69192 : struct ext4_inode_info *ei = EXT4_I(inode);
- - - - +
- + - + -
- - - - ]
448 : :
449 [ - - - - : 138384 : if (ext4_handle_valid(handle) && !is_handle_aborted(handle)) {
+ - + - -
- - - - -
- - + - +
- + - + -
+ - + - -
- - - - -
- - ]
450 : 69192 : ei->i_sync_tid = handle->h_transaction->t_tid;
451 [ + + ]: 65838 : if (datasync)
452 : 6851 : ei->i_datasync_tid = handle->h_transaction->t_tid;
453 : : }
454 : 65734 : }
455 : :
456 : : /* super.c */
457 : : int ext4_force_commit(struct super_block *sb);
458 : :
459 : : /*
460 : : * Ext4 inode journal modes
461 : : */
462 : : #define EXT4_INODE_JOURNAL_DATA_MODE 0x01 /* journal data mode */
463 : : #define EXT4_INODE_ORDERED_DATA_MODE 0x02 /* ordered data mode */
464 : : #define EXT4_INODE_WRITEBACK_DATA_MODE 0x04 /* writeback data mode */
465 : :
466 : : int ext4_inode_journal_mode(struct inode *inode);
467 : :
468 : 1066 : static inline int ext4_should_journal_data(struct inode *inode)
469 : : {
470 [ + + - - : 728 : return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE;
+ + - - -
+ - - - +
- - - - -
- ]
471 : : }
472 : :
473 : 3380 : static inline int ext4_should_order_data(struct inode *inode)
474 : : {
475 [ - - - - : 3380 : return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE;
- + + + ]
476 : : }
477 : :
478 : 104 : static inline int ext4_should_writeback_data(struct inode *inode)
479 : : {
480 [ + - ]: 104 : return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE;
481 : : }
482 : :
483 : 130 : static inline int ext4_free_data_revoke_credits(struct inode *inode, int blocks)
484 : : {
485 [ + - ]: 130 : if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
486 : : return 0;
487 [ + + ]: 130 : if (!ext4_should_journal_data(inode))
488 : : return 0;
489 : : /*
490 : : * Data blocks in one extent are contiguous, just account for partial
491 : : * clusters at extent boundaries
492 : : */
493 : 26 : return blocks + 2*(EXT4_SB(inode->i_sb)->s_cluster_ratio - 1);
494 : : }
495 : :
496 : : /*
497 : : * This function controls whether or not we should try to go down the
498 : : * dioread_nolock code paths, which makes it safe to avoid taking
499 : : * i_mutex for direct I/O reads. This only works for extent-based
500 : : * files, and it doesn't work if data journaling is enabled, since the
501 : : * dioread_nolock code uses b_private to pass information back to the
502 : : * I/O completion handler, and this conflicts with the jbd's use of
503 : : * b_private.
504 : : */
505 : 208 : static inline int ext4_should_dioread_nolock(struct inode *inode)
506 : : {
507 [ + - ]: 208 : if (!test_opt(inode->i_sb, DIOREAD_NOLOCK))
508 : : return 0;
509 [ + - ]: 208 : if (!S_ISREG(inode->i_mode))
510 : : return 0;
511 [ + - ]: 208 : if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
512 : : return 0;
513 : 208 : if (ext4_should_journal_data(inode))
514 : : return 0;
515 : : return 1;
516 : : }
517 : :
518 : : #endif /* _EXT4_JBD2_H */
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