journal.h

  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
 16enum ocfs2_journal_state {
 17	OCFS2_JOURNAL_FREE = 0,
 18	OCFS2_JOURNAL_LOADED,
 19	OCFS2_JOURNAL_IN_SHUTDOWN,
 20};
 21
 22struct ocfs2_super;
 23struct 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
 30struct ocfs2_recovery_map {
 31	unsigned int rm_used;
 32	unsigned int rm_entries[];
 33};
 34
 35
 36struct 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
 64extern spinlock_t trans_inc_lock;
 65
 66/* wrap j_trans_id so we never have it equal to zero. */
 67static 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
 78static 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. */
 91static 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. */
107static 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 */
122static 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
133static 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. */
142void ocfs2_orphan_scan_init(struct ocfs2_super *osb);
143void ocfs2_orphan_scan_start(struct ocfs2_super *osb);
144void ocfs2_orphan_scan_stop(struct ocfs2_super *osb);
145
146void ocfs2_complete_recovery(struct work_struct *work);
147void ocfs2_wait_for_recovery(struct ocfs2_super *osb);
148
149int ocfs2_recovery_init(struct ocfs2_super *osb);
150void ocfs2_recovery_exit(struct ocfs2_super *osb);
151void ocfs2_recovery_disable_quota(struct ocfs2_super *osb);
152
153int ocfs2_compute_replay_slots(struct ocfs2_super *osb);
154void ocfs2_free_replay_slots(struct ocfs2_super *osb);
155/*
156 *  Journal Control:
157 *  Initialize, Load, Shutdown, Wipe a journal.
158 *
159 *  ocfs2_journal_alloc    - Initialize skeleton for journal structure.
160 *  ocfs2_journal_init     - Initialize journal structures in the OSB.
161 *  ocfs2_journal_load     - Load the given journal off disk. Replay it if
162 *                          there's transactions still in there.
163 *  ocfs2_journal_shutdown - Shutdown a journal, this will flush all
164 *                          uncommitted, uncheckpointed transactions.
165 *  ocfs2_journal_wipe     - Wipe transactions from a journal. Optionally
166 *                          zero out each block.
167 *  ocfs2_recovery_thread  - Perform recovery on a node. osb is our own osb.
168 *  ocfs2_mark_dead_nodes - Start recovery on nodes we won't get a heartbeat
169 *                          event on.
170 *  ocfs2_start_checkpoint - Kick the commit thread to do a checkpoint.
171 */
172void   ocfs2_set_journal_params(struct ocfs2_super *osb);
173int    ocfs2_journal_alloc(struct ocfs2_super *osb);
174int    ocfs2_journal_init(struct ocfs2_super *osb, int *dirty);
175void   ocfs2_journal_shutdown(struct ocfs2_super *osb);
176int    ocfs2_journal_wipe(struct ocfs2_journal *journal,
177			  int full);
178int    ocfs2_journal_load(struct ocfs2_journal *journal, int local,
179			  int replayed);
180int    ocfs2_check_journals_nolocks(struct ocfs2_super *osb);
181void   ocfs2_recovery_thread(struct ocfs2_super *osb,
182			     int node_num);
183int    ocfs2_mark_dead_nodes(struct ocfs2_super *osb);
184void   ocfs2_complete_mount_recovery(struct ocfs2_super *osb);
185void ocfs2_complete_quota_recovery(struct ocfs2_super *osb);
186
187static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb)
188{
189	wake_up(&osb->checkpoint_event);
190}
191
192static inline void ocfs2_checkpoint_inode(struct inode *inode)
193{
194	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
195
196	if (ocfs2_mount_local(osb))
197		return;
198
199	if (!ocfs2_ci_fully_checkpointed(INODE_CACHE(inode))) {
200		/* WARNING: This only kicks off a single
201		 * checkpoint. If someone races you and adds more
202		 * metadata to the journal, you won't know, and will
203		 * wind up waiting *a lot* longer than necessary. Right
204		 * now we only use this in clear_inode so that's
205		 * OK. */
206		ocfs2_start_checkpoint(osb);
207
208		wait_event(osb->journal->j_checkpointed,
209			   ocfs2_ci_fully_checkpointed(INODE_CACHE(inode)));
210	}
211}
212
213/*
214 *  Transaction Handling:
215 *  Manage the lifetime of a transaction handle.
216 *
217 *  ocfs2_start_trans      - Begin a transaction. Give it an upper estimate of
218 *                          the number of blocks that will be changed during
219 *                          this handle.
220 *  ocfs2_commit_trans - Complete a handle. It might return -EIO if
221 *                       the journal was aborted. The majority of paths don't
222 *                       check the return value as an error there comes too
223 *                       late to do anything (and will be picked up in a
224 *                       later transaction).
225 *  ocfs2_extend_trans     - Extend a handle by nblocks credits. This may
226 *                          commit the handle to disk in the process, but will
227 *                          not release any locks taken during the transaction.
228 *  ocfs2_journal_access* - Notify the handle that we want to journal this
229 *                          buffer. Will have to call ocfs2_journal_dirty once
230 *                          we've actually dirtied it. Type is one of . or .
231 *                          Always call the specific flavor of
232 *                          ocfs2_journal_access_*() unless you intend to
233 *                          manage the checksum by hand.
234 *  ocfs2_journal_dirty    - Mark a journalled buffer as having dirty data.
235 *  ocfs2_jbd2_inode_add_write  - Mark an inode with range so that its data goes
236 *                                out before the current handle commits.
237 */
238
239/* You must always start_trans with a number of buffs > 0, but it's
240 * perfectly legal to go through an entire transaction without having
241 * dirtied any buffers. */
242handle_t		    *ocfs2_start_trans(struct ocfs2_super *osb,
243					       int max_buffs);
244int			     ocfs2_commit_trans(struct ocfs2_super *osb,
245						handle_t *handle);
246int			     ocfs2_extend_trans(handle_t *handle, int nblocks);
247int			     ocfs2_assure_trans_credits(handle_t *handle,
248						int nblocks);
249int			     ocfs2_allocate_extend_trans(handle_t *handle,
250						int thresh);
251
252/*
253 * Define an arbitrary limit for the amount of data we will anticipate
254 * writing to any given transaction.  For unbounded transactions such as
255 * fallocate(2) we can write more than this, but we always
256 * start off at the maximum transaction size and grow the transaction
257 * optimistically as we go.
258 */
259#define OCFS2_MAX_TRANS_DATA	64U
260
261/*
262 * Create access is for when we get a newly created buffer and we're
263 * not gonna read it off disk, but rather fill it ourselves.  Right
264 * now, we don't do anything special with this (it turns into a write
265 * request), but this is a good placeholder in case we do...
266 *
267 * Write access is for when we read a block off disk and are going to
268 * modify it. This way the journalling layer knows it may need to make
269 * a copy of that block (if it's part of another, uncommitted
270 * transaction) before we do so.
271 */
272#define OCFS2_JOURNAL_ACCESS_CREATE 0
273#define OCFS2_JOURNAL_ACCESS_WRITE  1
274#define OCFS2_JOURNAL_ACCESS_UNDO   2
275
276
277/* ocfs2_inode */
278int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci,
279			    struct buffer_head *bh, int type);
280/* ocfs2_extent_block */
281int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci,
282			    struct buffer_head *bh, int type);
283/* ocfs2_refcount_block */
284int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci,
285			    struct buffer_head *bh, int type);
286/* ocfs2_group_desc */
287int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci,
288			    struct buffer_head *bh, int type);
289/* ocfs2_xattr_block */
290int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci,
291			    struct buffer_head *bh, int type);
292/* quota blocks */
293int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci,
294			    struct buffer_head *bh, int type);
295/* dirblock */
296int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci,
297			    struct buffer_head *bh, int type);
298/* ocfs2_dx_root_block */
299int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci,
300			    struct buffer_head *bh, int type);
301/* ocfs2_dx_leaf */
302int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci,
303			    struct buffer_head *bh, int type);
304/* Anything that has no ecc */
305int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci,
306			 struct buffer_head *bh, int type);
307
308/*
309 * A word about the journal_access/journal_dirty "dance". It is
310 * entirely legal to journal_access a buffer more than once (as long
311 * as the access type is the same -- I'm not sure what will happen if
312 * access type is different but this should never happen anyway) It is
313 * also legal to journal_dirty a buffer more than once. In fact, you
314 * can even journal_access a buffer after you've done a
315 * journal_access/journal_dirty pair. The only thing you cannot do
316 * however, is journal_dirty a buffer which you haven't yet passed to
317 * journal_access at least once.
318 *
319 * That said, 99% of the time this doesn't matter and this is what the
320 * path looks like:
321 *
322 *	<read a bh>
323 *	ocfs2_journal_access(handle, bh,	OCFS2_JOURNAL_ACCESS_WRITE);
324 *	<modify the bh>
325 * 	ocfs2_journal_dirty(handle, bh);
326 */
327void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh);
328
329/*
330 *  Credit Macros:
331 *  Convenience macros to calculate number of credits needed.
332 *
333 *  For convenience sake, I have a set of macros here which calculate
334 *  the *maximum* number of sectors which will be changed for various
335 *  metadata updates.
336 */
337
338/* simple file updates like chmod, etc. */
339#define OCFS2_INODE_UPDATE_CREDITS 1
340
341/* extended attribute block update */
342#define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1
343
344/* Update of a single quota block */
345#define OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 1
346
347/* global quotafile inode update, data block */
348#define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
349				   OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
350
351#define OCFS2_LOCAL_QINFO_WRITE_CREDITS OCFS2_QUOTA_BLOCK_UPDATE_CREDITS
352/*
353 * The two writes below can accidentally see global info dirty due
354 * to set_info() quotactl so make them prepared for the writes.
355 */
356/* quota data block, global info */
357/* Write to local quota file */
358#define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
359			      OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
360
361/* global quota data block, local quota data block, global quota inode,
362 * global quota info */
363#define OCFS2_QSYNC_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \
364			     2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS)
365
366static inline int ocfs2_quota_trans_credits(struct super_block *sb)
367{
368	int credits = 0;
369
370	if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA))
371		credits += OCFS2_QWRITE_CREDITS;
372	if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA))
373		credits += OCFS2_QWRITE_CREDITS;
374	return credits;
375}
376
377/* group extend. inode update and last group update. */
378#define OCFS2_GROUP_EXTEND_CREDITS	(OCFS2_INODE_UPDATE_CREDITS + 1)
379
380/* group add. inode update and the new group update. */
381#define OCFS2_GROUP_ADD_CREDITS	(OCFS2_INODE_UPDATE_CREDITS + 1)
382
383/* get one bit out of a suballocator: dinode + group descriptor +
384 * prev. group desc. if we relink. */
385#define OCFS2_SUBALLOC_ALLOC (3)
386
387static inline int ocfs2_inline_to_extents_credits(struct super_block *sb)
388{
389	return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS +
390	       ocfs2_quota_trans_credits(sb);
391}
392
393/* dinode + group descriptor update. We don't relink on free yet. */
394#define OCFS2_SUBALLOC_FREE  (2)
395
396#define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS
397#define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE 		      \
398					 + OCFS2_TRUNCATE_LOG_UPDATE)
399
400static inline int ocfs2_remove_extent_credits(struct super_block *sb)
401{
402	return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS +
403	       ocfs2_quota_trans_credits(sb);
404}
405
406/* data block for new dir/symlink, allocation of directory block, dx_root
407 * update for free list */
408#define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1)
409
410static inline int ocfs2_add_dir_index_credits(struct super_block *sb)
411{
412	/* 1 block for index, 2 allocs (data, metadata), 1 clusters
413	 * worth of blocks for initial extent. */
414	return 1 + 2 * OCFS2_SUBALLOC_ALLOC +
415		ocfs2_clusters_to_blocks(sb, 1);
416}
417
418/* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode
419 * alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr
420 * blocks + quota update */
421static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir,
422				      int xattr_credits)
423{
424	int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS;
425
426	if (is_dir)
427		dir_credits += ocfs2_add_dir_index_credits(sb);
428
429	return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits +
430	       ocfs2_quota_trans_credits(sb);
431}
432
433/* local alloc metadata change + main bitmap updates */
434#define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS                 \
435				  + OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE)
436
437/* used when we don't need an allocation change for a dir extend. One
438 * for the dinode, one for the new block. */
439#define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2)
440
441/* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota
442 * update on dir + index leaf + dx root update for free list +
443 * previous dirblock update in the free list */
444static inline int ocfs2_link_credits(struct super_block *sb)
445{
446	return 2 * OCFS2_INODE_UPDATE_CREDITS + 4 +
447	       ocfs2_quota_trans_credits(sb);
448}
449
450/* inode + dir inode (if we unlink a dir), + dir entry block + orphan
451 * dir inode link + dir inode index leaf + dir index root */
452static inline int ocfs2_unlink_credits(struct super_block *sb)
453{
454	/* The quota update from ocfs2_link_credits is unused here... */
455	return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb);
456}
457
458/* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry +
459 * inode alloc group descriptor + orphan dir index root +
460 * orphan dir index leaf */
461#define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4)
462
463/* dinode + orphan dir dinode + extent tree leaf block + orphan dir entry +
464 * orphan dir index root + orphan dir index leaf */
465#define OCFS2_INODE_ADD_TO_ORPHAN_CREDITS  (2 * OCFS2_INODE_UPDATE_CREDITS + 4)
466#define OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS  OCFS2_INODE_ADD_TO_ORPHAN_CREDITS
467
468/* dinode update, old dir dinode update, new dir dinode update, old
469 * dir dir entry, new dir dir entry, dir entry update for renaming
470 * directory + target unlink + 3 x dir index leaves */
471static inline int ocfs2_rename_credits(struct super_block *sb)
472{
473	return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb);
474}
475
476/* global bitmap dinode, group desc., relinked group,
477 * suballocator dinode, group desc., relinked group,
478 * dinode, xattr block */
479#define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \
480					  + OCFS2_INODE_UPDATE_CREDITS \
481					  + OCFS2_XATTR_BLOCK_UPDATE_CREDITS)
482
483/* inode update, removal of dx root block from allocator */
484#define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS +	\
485				      OCFS2_SUBALLOC_FREE)
486
487static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb)
488{
489	int credits = 1 + OCFS2_SUBALLOC_ALLOC;
490
491	credits += ocfs2_clusters_to_blocks(sb, 1);
492	credits += ocfs2_quota_trans_credits(sb);
493
494	return credits;
495}
496
497/* inode update, new refcount block and its allocation credits. */
498#define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \
499					    + OCFS2_SUBALLOC_ALLOC)
500
501/* inode and the refcount block update. */
502#define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
503
504/*
505 * inode and the refcount block update.
506 * It doesn't include the credits for sub alloc change.
507 * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added.
508 */
509#define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
510
511/* 2 metadata alloc, 2 new blocks and root refcount block */
512#define OCFS2_EXPAND_REFCOUNT_TREE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + 3)
513
514/*
515 * Please note that the caller must make sure that root_el is the root
516 * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
517 * the result may be wrong.
518 */
519static inline int ocfs2_calc_extend_credits(struct super_block *sb,
520					    struct ocfs2_extent_list *root_el)
521{
522	int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks;
523
524	/* bitmap dinode, group desc. + relinked group. */
525	bitmap_blocks = OCFS2_SUBALLOC_ALLOC;
526
527	/* we might need to shift tree depth so lets assume an
528	 * absolute worst case of complete fragmentation.  Even with
529	 * that, we only need one update for the dinode, and then
530	 * however many metadata chunks needed * a remaining suballoc
531	 * alloc. */
532	sysfile_bitmap_blocks = 1 +
533		(OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el);
534
535	/* this does not include *new* metadata blocks, which are
536	 * accounted for in sysfile_bitmap_blocks. root_el +
537	 * prev. last_eb_blk + blocks along edge of tree.
538	 * calc_symlink_credits passes because we just need 1
539	 * credit for the dinode there. */
540	extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
541
542	return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks +
543	       ocfs2_quota_trans_credits(sb);
544}
545
546static inline int ocfs2_calc_symlink_credits(struct super_block *sb)
547{
548	int blocks = ocfs2_mknod_credits(sb, 0, 0);
549
550	/* links can be longer than one block so we may update many
551	 * within our single allocated extent. */
552	blocks += ocfs2_clusters_to_blocks(sb, 1);
553
554	return blocks + ocfs2_quota_trans_credits(sb);
555}
556
557static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb,
558						 unsigned int cpg)
559{
560	int blocks;
561	int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1;
562	/* parent inode update + new block group header + bitmap inode update
563	   + bitmap blocks affected */
564	blocks = 1 + 1 + 1 + bitmap_blocks;
565	return blocks;
566}
567
568/*
569 * Allocating a discontiguous block group requires the credits from
570 * ocfs2_calc_group_alloc_credits() as well as enough credits to fill
571 * the group descriptor's extent list.  The caller already has started
572 * the transaction with ocfs2_calc_group_alloc_credits().  They extend
573 * it with these credits.
574 */
575static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb)
576{
577	return ocfs2_extent_recs_per_gd(sb);
578}
579
580static inline int ocfs2_jbd2_inode_add_write(handle_t *handle, struct inode *inode,
581					     loff_t start_byte, loff_t length)
582{
583	return jbd2_journal_inode_ranged_write(handle,
584					       &OCFS2_I(inode)->ip_jinode,
585					       start_byte, length);
586}
587
588static inline int ocfs2_begin_ordered_truncate(struct inode *inode,
589					       loff_t new_size)
590{
591	return jbd2_journal_begin_ordered_truncate(
592				OCFS2_SB(inode->i_sb)->journal->j_journal,
593				&OCFS2_I(inode)->ip_jinode,
594				new_size);
595}
596
597static inline void ocfs2_update_inode_fsync_trans(handle_t *handle,
598						  struct inode *inode,
599						  int datasync)
600{
601	struct ocfs2_inode_info *oi = OCFS2_I(inode);
602
603	if (!is_handle_aborted(handle)) {
604		oi->i_sync_tid = handle->h_transaction->t_tid;
605		if (datasync)
606			oi->i_datasync_tid = handle->h_transaction->t_tid;
607	}
608}
609
610#endif /* OCFS2_JOURNAL_H */