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