1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * journal.h
6 *
7 * Defines journalling api and structures.
8 *
9 * Copyright (C) 2003, 2005 Oracle. All rights reserved.
10 */
11
12 #ifndef OCFS2_JOURNAL_H
13 #define OCFS2_JOURNAL_H
14
15 #include <linux/fs.h>
16 #include <linux/jbd2.h>
17
18 enum ocfs2_journal_state {
19 OCFS2_JOURNAL_FREE = 0,
20 OCFS2_JOURNAL_LOADED,
21 OCFS2_JOURNAL_IN_SHUTDOWN,
22 };
23
24 struct ocfs2_super;
25 struct ocfs2_dinode;
26
27 /*
28 * The recovery_list is a simple linked list of node numbers to recover.
29 * It is protected by the recovery_lock.
30 */
31
32 struct ocfs2_recovery_map {
33 unsigned int rm_used;
34 unsigned int *rm_entries;
35 };
36
37
38 struct ocfs2_journal {
39 enum ocfs2_journal_state j_state; /* Journals current state */
40
41 journal_t *j_journal; /* The kernels journal type */
42 struct inode *j_inode; /* Kernel inode pointing to
43 * this journal */
44 struct ocfs2_super *j_osb; /* pointer to the super
45 * block for the node
46 * we're currently
47 * running on -- not
48 * necessarily the super
49 * block from the node
50 * which we usually run
51 * from (recovery,
52 * etc) */
53 struct buffer_head *j_bh; /* Journal disk inode block */
54 atomic_t j_num_trans; /* Number of transactions
55 * currently in the system. */
56 spinlock_t j_lock;
57 unsigned long j_trans_id;
58 struct rw_semaphore j_trans_barrier;
59 wait_queue_head_t j_checkpointed;
60
61 /* both fields protected by j_lock*/
62 struct list_head j_la_cleanups;
63 struct work_struct j_recovery_work;
64 };
65
66 extern spinlock_t trans_inc_lock;
67
68 /* wrap j_trans_id so we never have it equal to zero. */
69 static inline unsigned long ocfs2_inc_trans_id(struct ocfs2_journal *j)
70 {
71 unsigned long old_id;
72 spin_lock(&trans_inc_lock);
73 old_id = j->j_trans_id++;
74 if (unlikely(!j->j_trans_id))
75 j->j_trans_id = 1;
76 spin_unlock(&trans_inc_lock);
77 return old_id;
78 }
79
80 static inline void ocfs2_set_ci_lock_trans(struct ocfs2_journal *journal,
81 struct ocfs2_caching_info *ci)
82 {
83 spin_lock(&trans_inc_lock);
84 ci->ci_last_trans = journal->j_trans_id;
85 spin_unlock(&trans_inc_lock);
86 }
87
88 /* Used to figure out whether it's safe to drop a metadata lock on an
89 * cached object. Returns true if all the object's changes have been
90 * checkpointed to disk. You should be holding the spinlock on the
91 * metadata lock while calling this to be sure that nobody can take
92 * the lock and put it on another transaction. */
93 static inline int ocfs2_ci_fully_checkpointed(struct ocfs2_caching_info *ci)
94 {
95 int ret;
96 struct ocfs2_journal *journal =
97 OCFS2_SB(ocfs2_metadata_cache_get_super(ci))->journal;
98
99 spin_lock(&trans_inc_lock);
100 ret = time_after(journal->j_trans_id, ci->ci_last_trans);
101 spin_unlock(&trans_inc_lock);
102 return ret;
103 }
104
105 /* convenience function to check if an object backed by struct
106 * ocfs2_caching_info is still new (has never hit disk) Will do you a
107 * favor and set created_trans = 0 when you've
108 * been checkpointed. returns '1' if the ci is still new. */
109 static inline int ocfs2_ci_is_new(struct ocfs2_caching_info *ci)
110 {
111 int ret;
112 struct ocfs2_journal *journal =
113 OCFS2_SB(ocfs2_metadata_cache_get_super(ci))->journal;
114
115 spin_lock(&trans_inc_lock);
116 ret = !(time_after(journal->j_trans_id, ci->ci_created_trans));
117 if (!ret)
118 ci->ci_created_trans = 0;
119 spin_unlock(&trans_inc_lock);
120 return ret;
121 }
122
123 /* Wrapper for inodes so we can check system files */
124 static inline int ocfs2_inode_is_new(struct inode *inode)
125 {
126 /* System files are never "new" as they're written out by
127 * mkfs. This helps us early during mount, before we have the
128 * journal open and j_trans_id could be junk. */
129 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SYSTEM_FILE)
130 return 0;
131
132 return ocfs2_ci_is_new(INODE_CACHE(inode));
133 }
134
135 static inline void ocfs2_ci_set_new(struct ocfs2_super *osb,
136 struct ocfs2_caching_info *ci)
137 {
138 spin_lock(&trans_inc_lock);
139 ci->ci_created_trans = osb->journal->j_trans_id;
140 spin_unlock(&trans_inc_lock);
141 }
142
143 /* Exported only for the journal struct init code in super.c. Do not call. */
144 void ocfs2_orphan_scan_init(struct ocfs2_super *osb);
145 void ocfs2_orphan_scan_start(struct ocfs2_super *osb);
146 void ocfs2_orphan_scan_stop(struct ocfs2_super *osb);
147
148 void ocfs2_complete_recovery(struct work_struct *work);
149 void ocfs2_wait_for_recovery(struct ocfs2_super *osb);
150
151 int ocfs2_recovery_init(struct ocfs2_super *osb);
152 void ocfs2_recovery_exit(struct ocfs2_super *osb);
153
154 int ocfs2_compute_replay_slots(struct ocfs2_super *osb);
155 /*
156 * Journal Control:
157 * Initialize, Load, Shutdown, Wipe a journal.
158 *
159 * ocfs2_journal_init - Initialize journal structures in the OSB.
160 * ocfs2_journal_load - Load the given journal off disk. Replay it if
161 * there's transactions still in there.
162 * ocfs2_journal_shutdown - Shutdown a journal, this will flush all
163 * uncommitted, uncheckpointed transactions.
164 * ocfs2_journal_wipe - Wipe transactions from a journal. Optionally
165 * zero out each block.
166 * ocfs2_recovery_thread - Perform recovery on a node. osb is our own osb.
167 * ocfs2_mark_dead_nodes - Start recovery on nodes we won't get a heartbeat
168 * event on.
169 * ocfs2_start_checkpoint - Kick the commit thread to do a checkpoint.
170 */
171 void ocfs2_set_journal_params(struct ocfs2_super *osb);
172 int ocfs2_journal_init(struct ocfs2_journal *journal,
173 int *dirty);
174 void ocfs2_journal_shutdown(struct ocfs2_super *osb);
175 int ocfs2_journal_wipe(struct ocfs2_journal *journal,
176 int full);
177 int ocfs2_journal_load(struct ocfs2_journal *journal, int local,
178 int replayed);
179 int ocfs2_check_journals_nolocks(struct ocfs2_super *osb);
180 void ocfs2_recovery_thread(struct ocfs2_super *osb,
181 int node_num);
182 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb);
183 void ocfs2_complete_mount_recovery(struct ocfs2_super *osb);
184 void ocfs2_complete_quota_recovery(struct ocfs2_super *osb);
185
186 static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb)
187 {
188 wake_up(&osb->checkpoint_event);
189 }
190
191 static inline void ocfs2_checkpoint_inode(struct inode *inode)
192 {
193 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
194
195 if (ocfs2_mount_local(osb))
196 return;
197
198 if (!ocfs2_ci_fully_checkpointed(INODE_CACHE(inode))) {
199 /* WARNING: This only kicks off a single
200 * checkpoint. If someone races you and adds more
201 * metadata to the journal, you won't know, and will
202 * wind up waiting *a lot* longer than necessary. Right
203 * now we only use this in clear_inode so that's
204 * OK. */
205 ocfs2_start_checkpoint(osb);
206
207 wait_event(osb->journal->j_checkpointed,
208 ocfs2_ci_fully_checkpointed(INODE_CACHE(inode)));
209 }
210 }
211
212 /*
213 * Transaction Handling:
214 * Manage the lifetime of a transaction handle.
215 *
216 * ocfs2_start_trans - Begin a transaction. Give it an upper estimate of
217 * the number of blocks that will be changed during
218 * this handle.
219 * ocfs2_commit_trans - Complete a handle. It might return -EIO if
220 * the journal was aborted. The majority of paths don't
221 * check the return value as an error there comes too
222 * late to do anything (and will be picked up in a
223 * later transaction).
224 * ocfs2_extend_trans - Extend a handle by nblocks credits. This may
225 * commit the handle to disk in the process, but will
226 * not release any locks taken during the transaction.
227 * ocfs2_journal_access* - Notify the handle that we want to journal this
228 * buffer. Will have to call ocfs2_journal_dirty once
229 * we've actually dirtied it. Type is one of . or .
230 * Always call the specific flavor of
231 * ocfs2_journal_access_*() unless you intend to
232 * manage the checksum by hand.
233 * ocfs2_journal_dirty - Mark a journalled buffer as having dirty data.
234 * ocfs2_jbd2_inode_add_write - Mark an inode with range so that its data goes
235 * out before the current handle commits.
236 */
237
238 /* You must always start_trans with a number of buffs > 0, but it's
239 * perfectly legal to go through an entire transaction without having
240 * dirtied any buffers. */
241 handle_t *ocfs2_start_trans(struct ocfs2_super *osb,
242 int max_buffs);
243 int ocfs2_commit_trans(struct ocfs2_super *osb,
244 handle_t *handle);
245 int ocfs2_extend_trans(handle_t *handle, int nblocks);
246 int ocfs2_allocate_extend_trans(handle_t *handle,
247 int thresh);
248
249 /*
250 * Define an arbitrary limit for the amount of data we will anticipate
251 * writing to any given transaction. For unbounded transactions such as
252 * fallocate(2) we can write more than this, but we always
253 * start off at the maximum transaction size and grow the transaction
254 * optimistically as we go.
255 */
256 #define OCFS2_MAX_TRANS_DATA 64U
257
258 /*
259 * Create access is for when we get a newly created buffer and we're
260 * not gonna read it off disk, but rather fill it ourselves. Right
261 * now, we don't do anything special with this (it turns into a write
262 * request), but this is a good placeholder in case we do...
263 *
264 * Write access is for when we read a block off disk and are going to
265 * modify it. This way the journalling layer knows it may need to make
266 * a copy of that block (if it's part of another, uncommitted
267 * transaction) before we do so.
268 */
269 #define OCFS2_JOURNAL_ACCESS_CREATE 0
270 #define OCFS2_JOURNAL_ACCESS_WRITE 1
271 #define OCFS2_JOURNAL_ACCESS_UNDO 2
272
273
274 /* ocfs2_inode */
275 int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci,
276 struct buffer_head *bh, int type);
277 /* ocfs2_extent_block */
278 int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci,
279 struct buffer_head *bh, int type);
280 /* ocfs2_refcount_block */
281 int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci,
282 struct buffer_head *bh, int type);
283 /* ocfs2_group_desc */
284 int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci,
285 struct buffer_head *bh, int type);
286 /* ocfs2_xattr_block */
287 int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci,
288 struct buffer_head *bh, int type);
289 /* quota blocks */
290 int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci,
291 struct buffer_head *bh, int type);
292 /* dirblock */
293 int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci,
294 struct buffer_head *bh, int type);
295 /* ocfs2_dx_root_block */
296 int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci,
297 struct buffer_head *bh, int type);
298 /* ocfs2_dx_leaf */
299 int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci,
300 struct buffer_head *bh, int type);
301 /* Anything that has no ecc */
302 int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci,
303 struct buffer_head *bh, int type);
304
305 /*
306 * A word about the journal_access/journal_dirty "dance". It is
307 * entirely legal to journal_access a buffer more than once (as long
308 * as the access type is the same -- I'm not sure what will happen if
309 * access type is different but this should never happen anyway) It is
310 * also legal to journal_dirty a buffer more than once. In fact, you
311 * can even journal_access a buffer after you've done a
312 * journal_access/journal_dirty pair. The only thing you cannot do
313 * however, is journal_dirty a buffer which you haven't yet passed to
314 * journal_access at least once.
315 *
316 * That said, 99% of the time this doesn't matter and this is what the
317 * path looks like:
318 *
319 * <read a bh>
320 * ocfs2_journal_access(handle, bh, OCFS2_JOURNAL_ACCESS_WRITE);
321 * <modify the bh>
322 * ocfs2_journal_dirty(handle, bh);
323 */
324 void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh);
325
326 /*
327 * Credit Macros:
328 * Convenience macros to calculate number of credits needed.
329 *
330 * For convenience sake, I have a set of macros here which calculate
331 * the *maximum* number of sectors which will be changed for various
332 * metadata updates.
333 */
334
335 /* simple file updates like chmod, etc. */
336 #define OCFS2_INODE_UPDATE_CREDITS 1
337
338 /* extended attribute block update */
339 #define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1
340
341 /* Update of a single quota block */
342 #define OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 1
343
344 /* global quotafile inode update, data block */
345 #define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
346 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
347
348 #define OCFS2_LOCAL_QINFO_WRITE_CREDITS OCFS2_QUOTA_BLOCK_UPDATE_CREDITS
349 /*
350 * The two writes below can accidentally see global info dirty due
351 * to set_info() quotactl so make them prepared for the writes.
352 */
353 /* quota data block, global info */
354 /* Write to local quota file */
355 #define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
356 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
357
358 /* global quota data block, local quota data block, global quota inode,
359 * global quota info */
360 #define OCFS2_QSYNC_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
361 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
362
363 static inline int ocfs2_quota_trans_credits(struct super_block *sb)
364 {
365 int credits = 0;
366
367 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA))
368 credits += OCFS2_QWRITE_CREDITS;
369 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA))
370 credits += OCFS2_QWRITE_CREDITS;
371 return credits;
372 }
373
374 /* group extend. inode update and last group update. */
375 #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
376
377 /* group add. inode update and the new group update. */
378 #define OCFS2_GROUP_ADD_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
379
380 /* get one bit out of a suballocator: dinode + group descriptor +
381 * prev. group desc. if we relink. */
382 #define OCFS2_SUBALLOC_ALLOC (3)
383
384 static inline int ocfs2_inline_to_extents_credits(struct super_block *sb)
385 {
386 return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS +
387 ocfs2_quota_trans_credits(sb);
388 }
389
390 /* dinode + group descriptor update. We don't relink on free yet. */
391 #define OCFS2_SUBALLOC_FREE (2)
392
393 #define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS
394 #define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE \
395 + OCFS2_TRUNCATE_LOG_UPDATE)
396
397 static inline int ocfs2_remove_extent_credits(struct super_block *sb)
398 {
399 return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS +
400 ocfs2_quota_trans_credits(sb);
401 }
402
403 /* data block for new dir/symlink, allocation of directory block, dx_root
404 * update for free list */
405 #define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1)
406
407 static inline int ocfs2_add_dir_index_credits(struct super_block *sb)
408 {
409 /* 1 block for index, 2 allocs (data, metadata), 1 clusters
410 * worth of blocks for initial extent. */
411 return 1 + 2 * OCFS2_SUBALLOC_ALLOC +
412 ocfs2_clusters_to_blocks(sb, 1);
413 }
414
415 /* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode
416 * alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr
417 * blocks + quota update */
418 static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir,
419 int xattr_credits)
420 {
421 int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS;
422
423 if (is_dir)
424 dir_credits += ocfs2_add_dir_index_credits(sb);
425
426 return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits +
427 ocfs2_quota_trans_credits(sb);
428 }
429
430 /* local alloc metadata change + main bitmap updates */
431 #define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS \
432 + OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE)
433
434 /* used when we don't need an allocation change for a dir extend. One
435 * for the dinode, one for the new block. */
436 #define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2)
437
438 /* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota
439 * update on dir + index leaf + dx root update for free list +
440 * previous dirblock update in the free list */
441 static inline int ocfs2_link_credits(struct super_block *sb)
442 {
443 return 2 * OCFS2_INODE_UPDATE_CREDITS + 4 +
444 ocfs2_quota_trans_credits(sb);
445 }
446
447 /* inode + dir inode (if we unlink a dir), + dir entry block + orphan
448 * dir inode link + dir inode index leaf + dir index root */
449 static inline int ocfs2_unlink_credits(struct super_block *sb)
450 {
451 /* The quota update from ocfs2_link_credits is unused here... */
452 return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb);
453 }
454
455 /* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry +
456 * inode alloc group descriptor + orphan dir index root +
457 * orphan dir index leaf */
458 #define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4)
459
460 /* dinode + orphan dir dinode + extent tree leaf block + orphan dir entry +
461 * orphan dir index root + orphan dir index leaf */
462 #define OCFS2_INODE_ADD_TO_ORPHAN_CREDITS (2 * OCFS2_INODE_UPDATE_CREDITS + 4)
463 #define OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS OCFS2_INODE_ADD_TO_ORPHAN_CREDITS
464
465 /* dinode update, old dir dinode update, new dir dinode update, old
466 * dir dir entry, new dir dir entry, dir entry update for renaming
467 * directory + target unlink + 3 x dir index leaves */
468 static inline int ocfs2_rename_credits(struct super_block *sb)
469 {
470 return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb);
471 }
472
473 /* global bitmap dinode, group desc., relinked group,
474 * suballocator dinode, group desc., relinked group,
475 * dinode, xattr block */
476 #define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \
477 + OCFS2_INODE_UPDATE_CREDITS \
478 + OCFS2_XATTR_BLOCK_UPDATE_CREDITS)
479
480 /* inode update, removal of dx root block from allocator */
481 #define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
482 OCFS2_SUBALLOC_FREE)
483
484 static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb)
485 {
486 int credits = 1 + OCFS2_SUBALLOC_ALLOC;
487
488 credits += ocfs2_clusters_to_blocks(sb, 1);
489 credits += ocfs2_quota_trans_credits(sb);
490
491 return credits;
492 }
493
494 /* inode update, new refcount block and its allocation credits. */
495 #define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \
496 + OCFS2_SUBALLOC_ALLOC)
497
498 /* inode and the refcount block update. */
499 #define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
500
501 /*
502 * inode and the refcount block update.
503 * It doesn't include the credits for sub alloc change.
504 * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added.
505 */
506 #define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
507
508 /* 2 metadata alloc, 2 new blocks and root refcount block */
509 #define OCFS2_EXPAND_REFCOUNT_TREE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + 3)
510
511 /*
512 * Please note that the caller must make sure that root_el is the root
513 * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
514 * the result may be wrong.
515 */
516 static inline int ocfs2_calc_extend_credits(struct super_block *sb,
517 struct ocfs2_extent_list *root_el)
518 {
519 int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks;
520
521 /* bitmap dinode, group desc. + relinked group. */
522 bitmap_blocks = OCFS2_SUBALLOC_ALLOC;
523
524 /* we might need to shift tree depth so lets assume an
525 * absolute worst case of complete fragmentation. Even with
526 * that, we only need one update for the dinode, and then
527 * however many metadata chunks needed * a remaining suballoc
528 * alloc. */
529 sysfile_bitmap_blocks = 1 +
530 (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el);
531
532 /* this does not include *new* metadata blocks, which are
533 * accounted for in sysfile_bitmap_blocks. root_el +
534 * prev. last_eb_blk + blocks along edge of tree.
535 * calc_symlink_credits passes because we just need 1
536 * credit for the dinode there. */
537 extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
538
539 return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks +
540 ocfs2_quota_trans_credits(sb);
541 }
542
543 static inline int ocfs2_calc_symlink_credits(struct super_block *sb)
544 {
545 int blocks = ocfs2_mknod_credits(sb, 0, 0);
546
547 /* links can be longer than one block so we may update many
548 * within our single allocated extent. */
549 blocks += ocfs2_clusters_to_blocks(sb, 1);
550
551 return blocks + ocfs2_quota_trans_credits(sb);
552 }
553
554 static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb,
555 unsigned int cpg)
556 {
557 int blocks;
558 int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1;
559 /* parent inode update + new block group header + bitmap inode update
560 + bitmap blocks affected */
561 blocks = 1 + 1 + 1 + bitmap_blocks;
562 return blocks;
563 }
564
565 /*
566 * Allocating a discontiguous block group requires the credits from
567 * ocfs2_calc_group_alloc_credits() as well as enough credits to fill
568 * the group descriptor's extent list. The caller already has started
569 * the transaction with ocfs2_calc_group_alloc_credits(). They extend
570 * it with these credits.
571 */
572 static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb)
573 {
574 return ocfs2_extent_recs_per_gd(sb);
575 }
576
577 static inline int ocfs2_jbd2_inode_add_write(handle_t *handle, struct inode *inode,
578 loff_t start_byte, loff_t length)
579 {
580 return jbd2_journal_inode_ranged_write(handle,
581 &OCFS2_I(inode)->ip_jinode,
582 start_byte, length);
583 }
584
585 static inline int ocfs2_begin_ordered_truncate(struct inode *inode,
586 loff_t new_size)
587 {
588 return jbd2_journal_begin_ordered_truncate(
589 OCFS2_SB(inode->i_sb)->journal->j_journal,
590 &OCFS2_I(inode)->ip_jinode,
591 new_size);
592 }
593
594 static inline void ocfs2_update_inode_fsync_trans(handle_t *handle,
595 struct inode *inode,
596 int datasync)
597 {
598 struct ocfs2_inode_info *oi = OCFS2_I(inode);
599
600 if (!is_handle_aborted(handle)) {
601 oi->i_sync_tid = handle->h_transaction->t_tid;
602 if (datasync)
603 oi->i_datasync_tid = handle->h_transaction->t_tid;
604 }
605 }
606
607 #endif /* OCFS2_JOURNAL_H */