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 void ocfs2_free_replay_slots(struct ocfs2_super *osb);
154 /*
155 * Journal Control:
156 * Initialize, Load, Shutdown, Wipe a journal.
157 *
158 * ocfs2_journal_alloc - Initialize skeleton for journal structure.
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_alloc(struct ocfs2_super *osb);
173 int ocfs2_journal_init(struct ocfs2_super *osb, 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
ocfs2_start_checkpoint(struct ocfs2_super * osb)186 static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb)
187 {
188 wake_up(&osb->checkpoint_event);
189 }
190
ocfs2_checkpoint_inode(struct inode * inode)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_assure_trans_credits(handle_t *handle,
247 int nblocks);
248 int ocfs2_allocate_extend_trans(handle_t *handle,
249 int thresh);
250
251 /*
252 * Define an arbitrary limit for the amount of data we will anticipate
253 * writing to any given transaction. For unbounded transactions such as
254 * fallocate(2) we can write more than this, but we always
255 * start off at the maximum transaction size and grow the transaction
256 * optimistically as we go.
257 */
258 #define OCFS2_MAX_TRANS_DATA 64U
259
260 /*
261 * Create access is for when we get a newly created buffer and we're
262 * not gonna read it off disk, but rather fill it ourselves. Right
263 * now, we don't do anything special with this (it turns into a write
264 * request), but this is a good placeholder in case we do...
265 *
266 * Write access is for when we read a block off disk and are going to
267 * modify it. This way the journalling layer knows it may need to make
268 * a copy of that block (if it's part of another, uncommitted
269 * transaction) before we do so.
270 */
271 #define OCFS2_JOURNAL_ACCESS_CREATE 0
272 #define OCFS2_JOURNAL_ACCESS_WRITE 1
273 #define OCFS2_JOURNAL_ACCESS_UNDO 2
274
275
276 /* ocfs2_inode */
277 int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci,
278 struct buffer_head *bh, int type);
279 /* ocfs2_extent_block */
280 int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci,
281 struct buffer_head *bh, int type);
282 /* ocfs2_refcount_block */
283 int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci,
284 struct buffer_head *bh, int type);
285 /* ocfs2_group_desc */
286 int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci,
287 struct buffer_head *bh, int type);
288 /* ocfs2_xattr_block */
289 int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci,
290 struct buffer_head *bh, int type);
291 /* quota blocks */
292 int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci,
293 struct buffer_head *bh, int type);
294 /* dirblock */
295 int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci,
296 struct buffer_head *bh, int type);
297 /* ocfs2_dx_root_block */
298 int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci,
299 struct buffer_head *bh, int type);
300 /* ocfs2_dx_leaf */
301 int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci,
302 struct buffer_head *bh, int type);
303 /* Anything that has no ecc */
304 int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci,
305 struct buffer_head *bh, int type);
306
307 /*
308 * A word about the journal_access/journal_dirty "dance". It is
309 * entirely legal to journal_access a buffer more than once (as long
310 * as the access type is the same -- I'm not sure what will happen if
311 * access type is different but this should never happen anyway) It is
312 * also legal to journal_dirty a buffer more than once. In fact, you
313 * can even journal_access a buffer after you've done a
314 * journal_access/journal_dirty pair. The only thing you cannot do
315 * however, is journal_dirty a buffer which you haven't yet passed to
316 * journal_access at least once.
317 *
318 * That said, 99% of the time this doesn't matter and this is what the
319 * path looks like:
320 *
321 * <read a bh>
322 * ocfs2_journal_access(handle, bh, OCFS2_JOURNAL_ACCESS_WRITE);
323 * <modify the bh>
324 * ocfs2_journal_dirty(handle, bh);
325 */
326 void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh);
327
328 /*
329 * Credit Macros:
330 * Convenience macros to calculate number of credits needed.
331 *
332 * For convenience sake, I have a set of macros here which calculate
333 * the *maximum* number of sectors which will be changed for various
334 * metadata updates.
335 */
336
337 /* simple file updates like chmod, etc. */
338 #define OCFS2_INODE_UPDATE_CREDITS 1
339
340 /* extended attribute block update */
341 #define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1
342
343 /* Update of a single quota block */
344 #define OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 1
345
346 /* global quotafile inode update, data block */
347 #define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
348 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
349
350 #define OCFS2_LOCAL_QINFO_WRITE_CREDITS OCFS2_QUOTA_BLOCK_UPDATE_CREDITS
351 /*
352 * The two writes below can accidentally see global info dirty due
353 * to set_info() quotactl so make them prepared for the writes.
354 */
355 /* quota data block, global info */
356 /* Write to local quota file */
357 #define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
358 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
359
360 /* global quota data block, local quota data block, global quota inode,
361 * global quota info */
362 #define OCFS2_QSYNC_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
363 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
364
ocfs2_quota_trans_credits(struct super_block * sb)365 static inline int ocfs2_quota_trans_credits(struct super_block *sb)
366 {
367 int credits = 0;
368
369 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA))
370 credits += OCFS2_QWRITE_CREDITS;
371 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA))
372 credits += OCFS2_QWRITE_CREDITS;
373 return credits;
374 }
375
376 /* group extend. inode update and last group update. */
377 #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
378
379 /* group add. inode update and the new group update. */
380 #define OCFS2_GROUP_ADD_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
381
382 /* get one bit out of a suballocator: dinode + group descriptor +
383 * prev. group desc. if we relink. */
384 #define OCFS2_SUBALLOC_ALLOC (3)
385
ocfs2_inline_to_extents_credits(struct super_block * sb)386 static inline int ocfs2_inline_to_extents_credits(struct super_block *sb)
387 {
388 return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS +
389 ocfs2_quota_trans_credits(sb);
390 }
391
392 /* dinode + group descriptor update. We don't relink on free yet. */
393 #define OCFS2_SUBALLOC_FREE (2)
394
395 #define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS
396 #define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE \
397 + OCFS2_TRUNCATE_LOG_UPDATE)
398
ocfs2_remove_extent_credits(struct super_block * sb)399 static inline int ocfs2_remove_extent_credits(struct super_block *sb)
400 {
401 return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS +
402 ocfs2_quota_trans_credits(sb);
403 }
404
405 /* data block for new dir/symlink, allocation of directory block, dx_root
406 * update for free list */
407 #define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1)
408
ocfs2_add_dir_index_credits(struct super_block * sb)409 static inline int ocfs2_add_dir_index_credits(struct super_block *sb)
410 {
411 /* 1 block for index, 2 allocs (data, metadata), 1 clusters
412 * worth of blocks for initial extent. */
413 return 1 + 2 * OCFS2_SUBALLOC_ALLOC +
414 ocfs2_clusters_to_blocks(sb, 1);
415 }
416
417 /* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode
418 * alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr
419 * blocks + quota update */
ocfs2_mknod_credits(struct super_block * sb,int is_dir,int xattr_credits)420 static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir,
421 int xattr_credits)
422 {
423 int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS;
424
425 if (is_dir)
426 dir_credits += ocfs2_add_dir_index_credits(sb);
427
428 return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits +
429 ocfs2_quota_trans_credits(sb);
430 }
431
432 /* local alloc metadata change + main bitmap updates */
433 #define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS \
434 + OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE)
435
436 /* used when we don't need an allocation change for a dir extend. One
437 * for the dinode, one for the new block. */
438 #define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2)
439
440 /* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota
441 * update on dir + index leaf + dx root update for free list +
442 * previous dirblock update in the free list */
ocfs2_link_credits(struct super_block * sb)443 static inline int ocfs2_link_credits(struct super_block *sb)
444 {
445 return 2 * OCFS2_INODE_UPDATE_CREDITS + 4 +
446 ocfs2_quota_trans_credits(sb);
447 }
448
449 /* inode + dir inode (if we unlink a dir), + dir entry block + orphan
450 * dir inode link + dir inode index leaf + dir index root */
ocfs2_unlink_credits(struct super_block * sb)451 static inline int ocfs2_unlink_credits(struct super_block *sb)
452 {
453 /* The quota update from ocfs2_link_credits is unused here... */
454 return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb);
455 }
456
457 /* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry +
458 * inode alloc group descriptor + orphan dir index root +
459 * orphan dir index leaf */
460 #define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4)
461
462 /* dinode + orphan dir dinode + extent tree leaf block + orphan dir entry +
463 * orphan dir index root + orphan dir index leaf */
464 #define OCFS2_INODE_ADD_TO_ORPHAN_CREDITS (2 * OCFS2_INODE_UPDATE_CREDITS + 4)
465 #define OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS OCFS2_INODE_ADD_TO_ORPHAN_CREDITS
466
467 /* dinode update, old dir dinode update, new dir dinode update, old
468 * dir dir entry, new dir dir entry, dir entry update for renaming
469 * directory + target unlink + 3 x dir index leaves */
ocfs2_rename_credits(struct super_block * sb)470 static inline int ocfs2_rename_credits(struct super_block *sb)
471 {
472 return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb);
473 }
474
475 /* global bitmap dinode, group desc., relinked group,
476 * suballocator dinode, group desc., relinked group,
477 * dinode, xattr block */
478 #define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \
479 + OCFS2_INODE_UPDATE_CREDITS \
480 + OCFS2_XATTR_BLOCK_UPDATE_CREDITS)
481
482 /* inode update, removal of dx root block from allocator */
483 #define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
484 OCFS2_SUBALLOC_FREE)
485
ocfs2_calc_dxi_expand_credits(struct super_block * sb)486 static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb)
487 {
488 int credits = 1 + OCFS2_SUBALLOC_ALLOC;
489
490 credits += ocfs2_clusters_to_blocks(sb, 1);
491 credits += ocfs2_quota_trans_credits(sb);
492
493 return credits;
494 }
495
496 /* inode update, new refcount block and its allocation credits. */
497 #define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \
498 + OCFS2_SUBALLOC_ALLOC)
499
500 /* inode and the refcount block update. */
501 #define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
502
503 /*
504 * inode and the refcount block update.
505 * It doesn't include the credits for sub alloc change.
506 * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added.
507 */
508 #define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
509
510 /* 2 metadata alloc, 2 new blocks and root refcount block */
511 #define OCFS2_EXPAND_REFCOUNT_TREE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + 3)
512
513 /*
514 * Please note that the caller must make sure that root_el is the root
515 * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
516 * the result may be wrong.
517 */
ocfs2_calc_extend_credits(struct super_block * sb,struct ocfs2_extent_list * root_el)518 static inline int ocfs2_calc_extend_credits(struct super_block *sb,
519 struct ocfs2_extent_list *root_el)
520 {
521 int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks;
522
523 /* bitmap dinode, group desc. + relinked group. */
524 bitmap_blocks = OCFS2_SUBALLOC_ALLOC;
525
526 /* we might need to shift tree depth so lets assume an
527 * absolute worst case of complete fragmentation. Even with
528 * that, we only need one update for the dinode, and then
529 * however many metadata chunks needed * a remaining suballoc
530 * alloc. */
531 sysfile_bitmap_blocks = 1 +
532 (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el);
533
534 /* this does not include *new* metadata blocks, which are
535 * accounted for in sysfile_bitmap_blocks. root_el +
536 * prev. last_eb_blk + blocks along edge of tree.
537 * calc_symlink_credits passes because we just need 1
538 * credit for the dinode there. */
539 extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
540
541 return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks +
542 ocfs2_quota_trans_credits(sb);
543 }
544
ocfs2_calc_symlink_credits(struct super_block * sb)545 static inline int ocfs2_calc_symlink_credits(struct super_block *sb)
546 {
547 int blocks = ocfs2_mknod_credits(sb, 0, 0);
548
549 /* links can be longer than one block so we may update many
550 * within our single allocated extent. */
551 blocks += ocfs2_clusters_to_blocks(sb, 1);
552
553 return blocks + ocfs2_quota_trans_credits(sb);
554 }
555
ocfs2_calc_group_alloc_credits(struct super_block * sb,unsigned int cpg)556 static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb,
557 unsigned int cpg)
558 {
559 int blocks;
560 int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1;
561 /* parent inode update + new block group header + bitmap inode update
562 + bitmap blocks affected */
563 blocks = 1 + 1 + 1 + bitmap_blocks;
564 return blocks;
565 }
566
567 /*
568 * Allocating a discontiguous block group requires the credits from
569 * ocfs2_calc_group_alloc_credits() as well as enough credits to fill
570 * the group descriptor's extent list. The caller already has started
571 * the transaction with ocfs2_calc_group_alloc_credits(). They extend
572 * it with these credits.
573 */
ocfs2_calc_bg_discontig_credits(struct super_block * sb)574 static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb)
575 {
576 return ocfs2_extent_recs_per_gd(sb);
577 }
578
ocfs2_jbd2_inode_add_write(handle_t * handle,struct inode * inode,loff_t start_byte,loff_t length)579 static inline int ocfs2_jbd2_inode_add_write(handle_t *handle, struct inode *inode,
580 loff_t start_byte, loff_t length)
581 {
582 return jbd2_journal_inode_ranged_write(handle,
583 &OCFS2_I(inode)->ip_jinode,
584 start_byte, length);
585 }
586
ocfs2_begin_ordered_truncate(struct inode * inode,loff_t new_size)587 static inline int ocfs2_begin_ordered_truncate(struct inode *inode,
588 loff_t new_size)
589 {
590 return jbd2_journal_begin_ordered_truncate(
591 OCFS2_SB(inode->i_sb)->journal->j_journal,
592 &OCFS2_I(inode)->ip_jinode,
593 new_size);
594 }
595
ocfs2_update_inode_fsync_trans(handle_t * handle,struct inode * inode,int datasync)596 static inline void ocfs2_update_inode_fsync_trans(handle_t *handle,
597 struct inode *inode,
598 int datasync)
599 {
600 struct ocfs2_inode_info *oi = OCFS2_I(inode);
601
602 if (!is_handle_aborted(handle)) {
603 oi->i_sync_tid = handle->h_transaction->t_tid;
604 if (datasync)
605 oi->i_datasync_tid = handle->h_transaction->t_tid;
606 }
607 }
608
609 #endif /* OCFS2_JOURNAL_H */
610