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