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 	if (!is_handle_aborted(handle)) {
641 		oi->i_sync_tid = handle->h_transaction->t_tid;
642 		if (datasync)
643 			oi->i_datasync_tid = handle->h_transaction->t_tid;
644 	}
645 }
646 
647 #endif /* OCFS2_JOURNAL_H */
648