1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * journal.h
5 *
6 * Defines journalling api and structures.
7 *
8 * Copyright (C) 2003, 2005 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #ifndef OCFS2_JOURNAL_H
27 #define OCFS2_JOURNAL_H
28
29 #include <linux/fs.h>
30 #include <linux/jbd2.h>
31
32 enum ocfs2_journal_state {
33 OCFS2_JOURNAL_FREE = 0,
34 OCFS2_JOURNAL_LOADED,
35 OCFS2_JOURNAL_IN_SHUTDOWN,
36 };
37
38 struct ocfs2_super;
39 struct ocfs2_dinode;
40
41 /*
42 * The recovery_list is a simple linked list of node numbers to recover.
43 * It is protected by the recovery_lock.
44 */
45
46 struct ocfs2_recovery_map {
47 unsigned int rm_used;
48 unsigned int *rm_entries;
49 };
50
51
52 struct ocfs2_journal {
53 enum ocfs2_journal_state j_state; /* Journals current state */
54
55 journal_t *j_journal; /* The kernels journal type */
56 struct inode *j_inode; /* Kernel inode pointing to
57 * this journal */
58 struct ocfs2_super *j_osb; /* pointer to the super
59 * block for the node
60 * we're currently
61 * running on -- not
62 * necessarily the super
63 * block from the node
64 * which we usually run
65 * from (recovery,
66 * etc) */
67 struct buffer_head *j_bh; /* Journal disk inode block */
68 atomic_t j_num_trans; /* Number of transactions
69 * currently in the system. */
70 spinlock_t j_lock;
71 unsigned long j_trans_id;
72 struct rw_semaphore j_trans_barrier;
73 wait_queue_head_t j_checkpointed;
74
75 /* both fields protected by j_lock*/
76 struct list_head j_la_cleanups;
77 struct work_struct j_recovery_work;
78 };
79
80 extern spinlock_t trans_inc_lock;
81
82 /* wrap j_trans_id so we never have it equal to zero. */
ocfs2_inc_trans_id(struct ocfs2_journal * j)83 static inline unsigned long ocfs2_inc_trans_id(struct ocfs2_journal *j)
84 {
85 unsigned long old_id;
86 spin_lock(&trans_inc_lock);
87 old_id = j->j_trans_id++;
88 if (unlikely(!j->j_trans_id))
89 j->j_trans_id = 1;
90 spin_unlock(&trans_inc_lock);
91 return old_id;
92 }
93
ocfs2_set_ci_lock_trans(struct ocfs2_journal * journal,struct ocfs2_caching_info * ci)94 static inline void ocfs2_set_ci_lock_trans(struct ocfs2_journal *journal,
95 struct ocfs2_caching_info *ci)
96 {
97 spin_lock(&trans_inc_lock);
98 ci->ci_last_trans = journal->j_trans_id;
99 spin_unlock(&trans_inc_lock);
100 }
101
102 /* Used to figure out whether it's safe to drop a metadata lock on an
103 * cached object. Returns true if all the object's changes have been
104 * checkpointed to disk. You should be holding the spinlock on the
105 * metadata lock while calling this to be sure that nobody can take
106 * the lock and put it on another transaction. */
ocfs2_ci_fully_checkpointed(struct ocfs2_caching_info * ci)107 static inline int ocfs2_ci_fully_checkpointed(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_last_trans);
115 spin_unlock(&trans_inc_lock);
116 return ret;
117 }
118
119 /* convenience function to check if an object backed by struct
120 * ocfs2_caching_info is still new (has never hit disk) Will do you a
121 * favor and set created_trans = 0 when you've
122 * been checkpointed. returns '1' if the ci is still new. */
ocfs2_ci_is_new(struct ocfs2_caching_info * ci)123 static inline int ocfs2_ci_is_new(struct ocfs2_caching_info *ci)
124 {
125 int ret;
126 struct ocfs2_journal *journal =
127 OCFS2_SB(ocfs2_metadata_cache_get_super(ci))->journal;
128
129 spin_lock(&trans_inc_lock);
130 ret = !(time_after(journal->j_trans_id, ci->ci_created_trans));
131 if (!ret)
132 ci->ci_created_trans = 0;
133 spin_unlock(&trans_inc_lock);
134 return ret;
135 }
136
137 /* Wrapper for inodes so we can check system files */
ocfs2_inode_is_new(struct inode * inode)138 static inline int ocfs2_inode_is_new(struct inode *inode)
139 {
140 /* System files are never "new" as they're written out by
141 * mkfs. This helps us early during mount, before we have the
142 * journal open and j_trans_id could be junk. */
143 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SYSTEM_FILE)
144 return 0;
145
146 return ocfs2_ci_is_new(INODE_CACHE(inode));
147 }
148
ocfs2_ci_set_new(struct ocfs2_super * osb,struct ocfs2_caching_info * ci)149 static inline void ocfs2_ci_set_new(struct ocfs2_super *osb,
150 struct ocfs2_caching_info *ci)
151 {
152 spin_lock(&trans_inc_lock);
153 ci->ci_created_trans = osb->journal->j_trans_id;
154 spin_unlock(&trans_inc_lock);
155 }
156
157 /* Exported only for the journal struct init code in super.c. Do not call. */
158 void ocfs2_orphan_scan_init(struct ocfs2_super *osb);
159 void ocfs2_orphan_scan_start(struct ocfs2_super *osb);
160 void ocfs2_orphan_scan_stop(struct ocfs2_super *osb);
161 void ocfs2_orphan_scan_exit(struct ocfs2_super *osb);
162
163 void ocfs2_complete_recovery(struct work_struct *work);
164 void ocfs2_wait_for_recovery(struct ocfs2_super *osb);
165
166 int ocfs2_recovery_init(struct ocfs2_super *osb);
167 void ocfs2_recovery_exit(struct ocfs2_super *osb);
168
169 int ocfs2_compute_replay_slots(struct ocfs2_super *osb);
170 /*
171 * Journal Control:
172 * Initialize, Load, Shutdown, Wipe a journal.
173 *
174 * ocfs2_journal_init - Initialize journal structures in the OSB.
175 * ocfs2_journal_load - Load the given journal off disk. Replay it if
176 * there's transactions still in there.
177 * ocfs2_journal_shutdown - Shutdown a journal, this will flush all
178 * uncommitted, uncheckpointed transactions.
179 * ocfs2_journal_wipe - Wipe transactions from a journal. Optionally
180 * zero out each block.
181 * ocfs2_recovery_thread - Perform recovery on a node. osb is our own osb.
182 * ocfs2_mark_dead_nodes - Start recovery on nodes we won't get a heartbeat
183 * event on.
184 * ocfs2_start_checkpoint - Kick the commit thread to do a checkpoint.
185 */
186 void ocfs2_set_journal_params(struct ocfs2_super *osb);
187 int ocfs2_journal_init(struct ocfs2_journal *journal,
188 int *dirty);
189 void ocfs2_journal_shutdown(struct ocfs2_super *osb);
190 int ocfs2_journal_wipe(struct ocfs2_journal *journal,
191 int full);
192 int ocfs2_journal_load(struct ocfs2_journal *journal, int local,
193 int replayed);
194 int ocfs2_check_journals_nolocks(struct ocfs2_super *osb);
195 void ocfs2_recovery_thread(struct ocfs2_super *osb,
196 int node_num);
197 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb);
198 void ocfs2_complete_mount_recovery(struct ocfs2_super *osb);
199 void ocfs2_complete_quota_recovery(struct ocfs2_super *osb);
200
ocfs2_start_checkpoint(struct ocfs2_super * osb)201 static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb)
202 {
203 wake_up(&osb->checkpoint_event);
204 }
205
ocfs2_checkpoint_inode(struct inode * inode)206 static inline void ocfs2_checkpoint_inode(struct inode *inode)
207 {
208 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
209
210 if (ocfs2_mount_local(osb))
211 return;
212
213 if (!ocfs2_ci_fully_checkpointed(INODE_CACHE(inode))) {
214 /* WARNING: This only kicks off a single
215 * checkpoint. If someone races you and adds more
216 * metadata to the journal, you won't know, and will
217 * wind up waiting *a lot* longer than necessary. Right
218 * now we only use this in clear_inode so that's
219 * OK. */
220 ocfs2_start_checkpoint(osb);
221
222 wait_event(osb->journal->j_checkpointed,
223 ocfs2_ci_fully_checkpointed(INODE_CACHE(inode)));
224 }
225 }
226
227 /*
228 * Transaction Handling:
229 * Manage the lifetime of a transaction handle.
230 *
231 * ocfs2_start_trans - Begin a transaction. Give it an upper estimate of
232 * the number of blocks that will be changed during
233 * this handle.
234 * ocfs2_commit_trans - Complete a handle. It might return -EIO if
235 * the journal was aborted. The majority of paths don't
236 * check the return value as an error there comes too
237 * late to do anything (and will be picked up in a
238 * later transaction).
239 * ocfs2_extend_trans - Extend a handle by nblocks credits. This may
240 * commit the handle to disk in the process, but will
241 * not release any locks taken during the transaction.
242 * ocfs2_journal_access* - Notify the handle that we want to journal this
243 * buffer. Will have to call ocfs2_journal_dirty once
244 * we've actually dirtied it. Type is one of . or .
245 * Always call the specific flavor of
246 * ocfs2_journal_access_*() unless you intend to
247 * manage the checksum by hand.
248 * ocfs2_journal_dirty - Mark a journalled buffer as having dirty data.
249 * ocfs2_jbd2_file_inode - Mark an inode so that its data goes out before
250 * the current handle commits.
251 */
252
253 /* You must always start_trans with a number of buffs > 0, but it's
254 * perfectly legal to go through an entire transaction without having
255 * dirtied any buffers. */
256 handle_t *ocfs2_start_trans(struct ocfs2_super *osb,
257 int max_buffs);
258 int ocfs2_commit_trans(struct ocfs2_super *osb,
259 handle_t *handle);
260 int ocfs2_extend_trans(handle_t *handle, int nblocks);
261 int ocfs2_allocate_extend_trans(handle_t *handle,
262 int thresh);
263
264 /*
265 * Define an arbitrary limit for the amount of data we will anticipate
266 * writing to any given transaction. For unbounded transactions such as
267 * fallocate(2) we can write more than this, but we always
268 * start off at the maximum transaction size and grow the transaction
269 * optimistically as we go.
270 */
271 #define OCFS2_MAX_TRANS_DATA 64U
272
273 /*
274 * Create access is for when we get a newly created buffer and we're
275 * not gonna read it off disk, but rather fill it ourselves. Right
276 * now, we don't do anything special with this (it turns into a write
277 * request), but this is a good placeholder in case we do...
278 *
279 * Write access is for when we read a block off disk and are going to
280 * modify it. This way the journalling layer knows it may need to make
281 * a copy of that block (if it's part of another, uncommitted
282 * transaction) before we do so.
283 */
284 #define OCFS2_JOURNAL_ACCESS_CREATE 0
285 #define OCFS2_JOURNAL_ACCESS_WRITE 1
286 #define OCFS2_JOURNAL_ACCESS_UNDO 2
287
288
289 /* ocfs2_inode */
290 int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci,
291 struct buffer_head *bh, int type);
292 /* ocfs2_extent_block */
293 int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci,
294 struct buffer_head *bh, int type);
295 /* ocfs2_refcount_block */
296 int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci,
297 struct buffer_head *bh, int type);
298 /* ocfs2_group_desc */
299 int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci,
300 struct buffer_head *bh, int type);
301 /* ocfs2_xattr_block */
302 int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci,
303 struct buffer_head *bh, int type);
304 /* quota blocks */
305 int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci,
306 struct buffer_head *bh, int type);
307 /* dirblock */
308 int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci,
309 struct buffer_head *bh, int type);
310 /* ocfs2_dx_root_block */
311 int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci,
312 struct buffer_head *bh, int type);
313 /* ocfs2_dx_leaf */
314 int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci,
315 struct buffer_head *bh, int type);
316 /* Anything that has no ecc */
317 int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci,
318 struct buffer_head *bh, int type);
319
320 /*
321 * A word about the journal_access/journal_dirty "dance". It is
322 * entirely legal to journal_access a buffer more than once (as long
323 * as the access type is the same -- I'm not sure what will happen if
324 * access type is different but this should never happen anyway) It is
325 * also legal to journal_dirty a buffer more than once. In fact, you
326 * can even journal_access a buffer after you've done a
327 * journal_access/journal_dirty pair. The only thing you cannot do
328 * however, is journal_dirty a buffer which you haven't yet passed to
329 * journal_access at least once.
330 *
331 * That said, 99% of the time this doesn't matter and this is what the
332 * path looks like:
333 *
334 * <read a bh>
335 * ocfs2_journal_access(handle, bh, OCFS2_JOURNAL_ACCESS_WRITE);
336 * <modify the bh>
337 * ocfs2_journal_dirty(handle, bh);
338 */
339 void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh);
340
341 /*
342 * Credit Macros:
343 * Convenience macros to calculate number of credits needed.
344 *
345 * For convenience sake, I have a set of macros here which calculate
346 * the *maximum* number of sectors which will be changed for various
347 * metadata updates.
348 */
349
350 /* simple file updates like chmod, etc. */
351 #define OCFS2_INODE_UPDATE_CREDITS 1
352
353 /* extended attribute block update */
354 #define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1
355
356 /* Update of a single quota block */
357 #define OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 1
358
359 /* global quotafile inode update, data block */
360 #define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
361 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
362
363 #define OCFS2_LOCAL_QINFO_WRITE_CREDITS OCFS2_QUOTA_BLOCK_UPDATE_CREDITS
364 /*
365 * The two writes below can accidentally see global info dirty due
366 * to set_info() quotactl so make them prepared for the writes.
367 */
368 /* quota data block, global info */
369 /* Write to local quota file */
370 #define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
371 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
372
373 /* global quota data block, local quota data block, global quota inode,
374 * global quota info */
375 #define OCFS2_QSYNC_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
376 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
377
ocfs2_quota_trans_credits(struct super_block * sb)378 static inline int ocfs2_quota_trans_credits(struct super_block *sb)
379 {
380 int credits = 0;
381
382 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA))
383 credits += OCFS2_QWRITE_CREDITS;
384 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA))
385 credits += OCFS2_QWRITE_CREDITS;
386 return credits;
387 }
388
389 /* group extend. inode update and last group update. */
390 #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
391
392 /* group add. inode update and the new group update. */
393 #define OCFS2_GROUP_ADD_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
394
395 /* get one bit out of a suballocator: dinode + group descriptor +
396 * prev. group desc. if we relink. */
397 #define OCFS2_SUBALLOC_ALLOC (3)
398
ocfs2_inline_to_extents_credits(struct super_block * sb)399 static inline int ocfs2_inline_to_extents_credits(struct super_block *sb)
400 {
401 return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS +
402 ocfs2_quota_trans_credits(sb);
403 }
404
405 /* dinode + group descriptor update. We don't relink on free yet. */
406 #define OCFS2_SUBALLOC_FREE (2)
407
408 #define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS
409 #define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE \
410 + OCFS2_TRUNCATE_LOG_UPDATE)
411
ocfs2_remove_extent_credits(struct super_block * sb)412 static inline int ocfs2_remove_extent_credits(struct super_block *sb)
413 {
414 return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS +
415 ocfs2_quota_trans_credits(sb);
416 }
417
418 /* data block for new dir/symlink, allocation of directory block, dx_root
419 * update for free list */
420 #define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1)
421
ocfs2_add_dir_index_credits(struct super_block * sb)422 static inline int ocfs2_add_dir_index_credits(struct super_block *sb)
423 {
424 /* 1 block for index, 2 allocs (data, metadata), 1 clusters
425 * worth of blocks for initial extent. */
426 return 1 + 2 * OCFS2_SUBALLOC_ALLOC +
427 ocfs2_clusters_to_blocks(sb, 1);
428 }
429
430 /* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode
431 * alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr
432 * blocks + quota update */
ocfs2_mknod_credits(struct super_block * sb,int is_dir,int xattr_credits)433 static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir,
434 int xattr_credits)
435 {
436 int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS;
437
438 if (is_dir)
439 dir_credits += ocfs2_add_dir_index_credits(sb);
440
441 return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits +
442 ocfs2_quota_trans_credits(sb);
443 }
444
445 /* local alloc metadata change + main bitmap updates */
446 #define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS \
447 + OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE)
448
449 /* used when we don't need an allocation change for a dir extend. One
450 * for the dinode, one for the new block. */
451 #define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2)
452
453 /* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota
454 * update on dir + index leaf + dx root update for free list +
455 * previous dirblock update in the free list */
ocfs2_link_credits(struct super_block * sb)456 static inline int ocfs2_link_credits(struct super_block *sb)
457 {
458 return 2*OCFS2_INODE_UPDATE_CREDITS + 4 +
459 ocfs2_quota_trans_credits(sb);
460 }
461
462 /* inode + dir inode (if we unlink a dir), + dir entry block + orphan
463 * dir inode link + dir inode index leaf + dir index root */
ocfs2_unlink_credits(struct super_block * sb)464 static inline int ocfs2_unlink_credits(struct super_block *sb)
465 {
466 /* The quota update from ocfs2_link_credits is unused here... */
467 return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb);
468 }
469
470 /* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry +
471 * inode alloc group descriptor + orphan dir index root +
472 * orphan dir index leaf */
473 #define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4)
474
475 /* dinode + orphan dir dinode + extent tree leaf block + orphan dir entry +
476 * orphan dir index root + orphan dir index leaf */
477 #define OCFS2_INODE_ADD_TO_ORPHAN_CREDITS (2 * OCFS2_INODE_UPDATE_CREDITS + 4)
478 #define OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS OCFS2_INODE_ADD_TO_ORPHAN_CREDITS
479
480 /* dinode update, old dir dinode update, new dir dinode update, old
481 * dir dir entry, new dir dir entry, dir entry update for renaming
482 * directory + target unlink + 3 x dir index leaves */
ocfs2_rename_credits(struct super_block * sb)483 static inline int ocfs2_rename_credits(struct super_block *sb)
484 {
485 return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb);
486 }
487
488 /* global bitmap dinode, group desc., relinked group,
489 * suballocator dinode, group desc., relinked group,
490 * dinode, xattr block */
491 #define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \
492 + OCFS2_INODE_UPDATE_CREDITS \
493 + OCFS2_XATTR_BLOCK_UPDATE_CREDITS)
494
495 /* inode update, removal of dx root block from allocator */
496 #define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
497 OCFS2_SUBALLOC_FREE)
498
ocfs2_calc_dxi_expand_credits(struct super_block * sb)499 static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb)
500 {
501 int credits = 1 + OCFS2_SUBALLOC_ALLOC;
502
503 credits += ocfs2_clusters_to_blocks(sb, 1);
504 credits += ocfs2_quota_trans_credits(sb);
505
506 return credits;
507 }
508
509 /* inode update, new refcount block and its allocation credits. */
510 #define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \
511 + OCFS2_SUBALLOC_ALLOC)
512
513 /* inode and the refcount block update. */
514 #define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
515
516 /*
517 * inode and the refcount block update.
518 * It doesn't include the credits for sub alloc change.
519 * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added.
520 */
521 #define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
522
523 /* 2 metadata alloc, 2 new blocks and root refcount block */
524 #define OCFS2_EXPAND_REFCOUNT_TREE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + 3)
525
526 /*
527 * Please note that the caller must make sure that root_el is the root
528 * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
529 * the result may be wrong.
530 */
ocfs2_calc_extend_credits(struct super_block * sb,struct ocfs2_extent_list * root_el)531 static inline int ocfs2_calc_extend_credits(struct super_block *sb,
532 struct ocfs2_extent_list *root_el)
533 {
534 int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks;
535
536 /* bitmap dinode, group desc. + relinked group. */
537 bitmap_blocks = OCFS2_SUBALLOC_ALLOC;
538
539 /* we might need to shift tree depth so lets assume an
540 * absolute worst case of complete fragmentation. Even with
541 * that, we only need one update for the dinode, and then
542 * however many metadata chunks needed * a remaining suballoc
543 * alloc. */
544 sysfile_bitmap_blocks = 1 +
545 (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el);
546
547 /* this does not include *new* metadata blocks, which are
548 * accounted for in sysfile_bitmap_blocks. root_el +
549 * prev. last_eb_blk + blocks along edge of tree.
550 * calc_symlink_credits passes because we just need 1
551 * credit for the dinode there. */
552 extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
553
554 return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks +
555 ocfs2_quota_trans_credits(sb);
556 }
557
ocfs2_calc_symlink_credits(struct super_block * sb)558 static inline int ocfs2_calc_symlink_credits(struct super_block *sb)
559 {
560 int blocks = ocfs2_mknod_credits(sb, 0, 0);
561
562 /* links can be longer than one block so we may update many
563 * within our single allocated extent. */
564 blocks += ocfs2_clusters_to_blocks(sb, 1);
565
566 return blocks + ocfs2_quota_trans_credits(sb);
567 }
568
ocfs2_calc_group_alloc_credits(struct super_block * sb,unsigned int cpg)569 static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb,
570 unsigned int cpg)
571 {
572 int blocks;
573 int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1;
574 /* parent inode update + new block group header + bitmap inode update
575 + bitmap blocks affected */
576 blocks = 1 + 1 + 1 + bitmap_blocks;
577 return blocks;
578 }
579
580 /*
581 * Allocating a discontiguous block group requires the credits from
582 * ocfs2_calc_group_alloc_credits() as well as enough credits to fill
583 * the group descriptor's extent list. The caller already has started
584 * the transaction with ocfs2_calc_group_alloc_credits(). They extend
585 * it with these credits.
586 */
ocfs2_calc_bg_discontig_credits(struct super_block * sb)587 static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb)
588 {
589 return ocfs2_extent_recs_per_gd(sb);
590 }
591
ocfs2_calc_tree_trunc_credits(struct super_block * sb,unsigned int clusters_to_del,struct ocfs2_dinode * fe,struct ocfs2_extent_list * last_el)592 static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb,
593 unsigned int clusters_to_del,
594 struct ocfs2_dinode *fe,
595 struct ocfs2_extent_list *last_el)
596 {
597 /* for dinode + all headers in this pass + update to next leaf */
598 u16 next_free = le16_to_cpu(last_el->l_next_free_rec);
599 u16 tree_depth = le16_to_cpu(fe->id2.i_list.l_tree_depth);
600 int credits = 1 + tree_depth + 1;
601 int i;
602
603 i = next_free - 1;
604 BUG_ON(i < 0);
605
606 /* We may be deleting metadata blocks, so metadata alloc dinode +
607 one desc. block for each possible delete. */
608 if (tree_depth && next_free == 1 &&
609 ocfs2_rec_clusters(last_el, &last_el->l_recs[i]) == clusters_to_del)
610 credits += 1 + tree_depth;
611
612 /* update to the truncate log. */
613 credits += OCFS2_TRUNCATE_LOG_UPDATE;
614
615 credits += ocfs2_quota_trans_credits(sb);
616
617 return credits;
618 }
619
ocfs2_jbd2_file_inode(handle_t * handle,struct inode * inode)620 static inline int ocfs2_jbd2_file_inode(handle_t *handle, struct inode *inode)
621 {
622 return jbd2_journal_inode_add_write(handle, &OCFS2_I(inode)->ip_jinode);
623 }
624
ocfs2_begin_ordered_truncate(struct inode * inode,loff_t new_size)625 static inline int ocfs2_begin_ordered_truncate(struct inode *inode,
626 loff_t new_size)
627 {
628 return jbd2_journal_begin_ordered_truncate(
629 OCFS2_SB(inode->i_sb)->journal->j_journal,
630 &OCFS2_I(inode)->ip_jinode,
631 new_size);
632 }
633
ocfs2_update_inode_fsync_trans(handle_t * handle,struct inode * inode,int datasync)634 static inline void ocfs2_update_inode_fsync_trans(handle_t *handle,
635 struct inode *inode,
636 int datasync)
637 {
638 struct ocfs2_inode_info *oi = OCFS2_I(inode);
639
640 oi->i_sync_tid = handle->h_transaction->t_tid;
641 if (datasync)
642 oi->i_datasync_tid = handle->h_transaction->t_tid;
643 }
644
645 #endif /* OCFS2_JOURNAL_H */
646
