1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * journal.h 6 * 7 * Defines journalling api and structures. 8 * 9 * Copyright (C) 2003, 2005 Oracle. All rights reserved. 10 */ 11 12 #ifndef OCFS2_JOURNAL_H 13 #define OCFS2_JOURNAL_H 14 15 #include <linux/fs.h> 16 #include <linux/jbd2.h> 17 18 enum ocfs2_journal_state { 19 OCFS2_JOURNAL_FREE = 0, 20 OCFS2_JOURNAL_LOADED, 21 OCFS2_JOURNAL_IN_SHUTDOWN, 22 }; 23 24 struct ocfs2_super; 25 struct ocfs2_dinode; 26 27 /* 28 * The recovery_list is a simple linked list of node numbers to recover. 29 * It is protected by the recovery_lock. 30 */ 31 32 struct ocfs2_recovery_map { 33 unsigned int rm_used; 34 unsigned int *rm_entries; 35 }; 36 37 38 struct ocfs2_journal { 39 enum ocfs2_journal_state j_state; /* Journals current state */ 40 41 journal_t *j_journal; /* The kernels journal type */ 42 struct inode *j_inode; /* Kernel inode pointing to 43 * this journal */ 44 struct ocfs2_super *j_osb; /* pointer to the super 45 * block for the node 46 * we're currently 47 * running on -- not 48 * necessarily the super 49 * block from the node 50 * which we usually run 51 * from (recovery, 52 * etc) */ 53 struct buffer_head *j_bh; /* Journal disk inode block */ 54 atomic_t j_num_trans; /* Number of transactions 55 * currently in the system. */ 56 spinlock_t j_lock; 57 unsigned long j_trans_id; 58 struct rw_semaphore j_trans_barrier; 59 wait_queue_head_t j_checkpointed; 60 61 /* both fields protected by j_lock*/ 62 struct list_head j_la_cleanups; 63 struct work_struct j_recovery_work; 64 }; 65 66 extern spinlock_t trans_inc_lock; 67 68 /* wrap j_trans_id so we never have it equal to zero. */ 69 static inline unsigned long ocfs2_inc_trans_id(struct ocfs2_journal *j) 70 { 71 unsigned long old_id; 72 spin_lock(&trans_inc_lock); 73 old_id = j->j_trans_id++; 74 if (unlikely(!j->j_trans_id)) 75 j->j_trans_id = 1; 76 spin_unlock(&trans_inc_lock); 77 return old_id; 78 } 79 80 static inline void ocfs2_set_ci_lock_trans(struct ocfs2_journal *journal, 81 struct ocfs2_caching_info *ci) 82 { 83 spin_lock(&trans_inc_lock); 84 ci->ci_last_trans = journal->j_trans_id; 85 spin_unlock(&trans_inc_lock); 86 } 87 88 /* Used to figure out whether it's safe to drop a metadata lock on an 89 * cached object. Returns true if all the object's changes have been 90 * checkpointed to disk. You should be holding the spinlock on the 91 * metadata lock while calling this to be sure that nobody can take 92 * the lock and put it on another transaction. */ 93 static inline int ocfs2_ci_fully_checkpointed(struct ocfs2_caching_info *ci) 94 { 95 int ret; 96 struct ocfs2_journal *journal = 97 OCFS2_SB(ocfs2_metadata_cache_get_super(ci))->journal; 98 99 spin_lock(&trans_inc_lock); 100 ret = time_after(journal->j_trans_id, ci->ci_last_trans); 101 spin_unlock(&trans_inc_lock); 102 return ret; 103 } 104 105 /* convenience function to check if an object backed by struct 106 * ocfs2_caching_info is still new (has never hit disk) Will do you a 107 * favor and set created_trans = 0 when you've 108 * been checkpointed. returns '1' if the ci is still new. */ 109 static inline int ocfs2_ci_is_new(struct ocfs2_caching_info *ci) 110 { 111 int ret; 112 struct ocfs2_journal *journal = 113 OCFS2_SB(ocfs2_metadata_cache_get_super(ci))->journal; 114 115 spin_lock(&trans_inc_lock); 116 ret = !(time_after(journal->j_trans_id, ci->ci_created_trans)); 117 if (!ret) 118 ci->ci_created_trans = 0; 119 spin_unlock(&trans_inc_lock); 120 return ret; 121 } 122 123 /* Wrapper for inodes so we can check system files */ 124 static inline int ocfs2_inode_is_new(struct inode *inode) 125 { 126 /* System files are never "new" as they're written out by 127 * mkfs. This helps us early during mount, before we have the 128 * journal open and j_trans_id could be junk. */ 129 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SYSTEM_FILE) 130 return 0; 131 132 return ocfs2_ci_is_new(INODE_CACHE(inode)); 133 } 134 135 static inline void ocfs2_ci_set_new(struct ocfs2_super *osb, 136 struct ocfs2_caching_info *ci) 137 { 138 spin_lock(&trans_inc_lock); 139 ci->ci_created_trans = osb->journal->j_trans_id; 140 spin_unlock(&trans_inc_lock); 141 } 142 143 /* Exported only for the journal struct init code in super.c. Do not call. */ 144 void ocfs2_orphan_scan_init(struct ocfs2_super *osb); 145 void ocfs2_orphan_scan_start(struct ocfs2_super *osb); 146 void ocfs2_orphan_scan_stop(struct ocfs2_super *osb); 147 148 void ocfs2_complete_recovery(struct work_struct *work); 149 void ocfs2_wait_for_recovery(struct ocfs2_super *osb); 150 151 int ocfs2_recovery_init(struct ocfs2_super *osb); 152 void ocfs2_recovery_exit(struct ocfs2_super *osb); 153 154 int ocfs2_compute_replay_slots(struct ocfs2_super *osb); 155 /* 156 * Journal Control: 157 * Initialize, Load, Shutdown, Wipe a journal. 158 * 159 * ocfs2_journal_init - Initialize journal structures in the OSB. 160 * ocfs2_journal_load - Load the given journal off disk. Replay it if 161 * there's transactions still in there. 162 * ocfs2_journal_shutdown - Shutdown a journal, this will flush all 163 * uncommitted, uncheckpointed transactions. 164 * ocfs2_journal_wipe - Wipe transactions from a journal. Optionally 165 * zero out each block. 166 * ocfs2_recovery_thread - Perform recovery on a node. osb is our own osb. 167 * ocfs2_mark_dead_nodes - Start recovery on nodes we won't get a heartbeat 168 * event on. 169 * ocfs2_start_checkpoint - Kick the commit thread to do a checkpoint. 170 */ 171 void ocfs2_set_journal_params(struct ocfs2_super *osb); 172 int ocfs2_journal_init(struct ocfs2_journal *journal, 173 int *dirty); 174 void ocfs2_journal_shutdown(struct ocfs2_super *osb); 175 int ocfs2_journal_wipe(struct ocfs2_journal *journal, 176 int full); 177 int ocfs2_journal_load(struct ocfs2_journal *journal, int local, 178 int replayed); 179 int ocfs2_check_journals_nolocks(struct ocfs2_super *osb); 180 void ocfs2_recovery_thread(struct ocfs2_super *osb, 181 int node_num); 182 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb); 183 void ocfs2_complete_mount_recovery(struct ocfs2_super *osb); 184 void ocfs2_complete_quota_recovery(struct ocfs2_super *osb); 185 186 static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb) 187 { 188 wake_up(&osb->checkpoint_event); 189 } 190 191 static inline void ocfs2_checkpoint_inode(struct inode *inode) 192 { 193 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 194 195 if (ocfs2_mount_local(osb)) 196 return; 197 198 if (!ocfs2_ci_fully_checkpointed(INODE_CACHE(inode))) { 199 /* WARNING: This only kicks off a single 200 * checkpoint. If someone races you and adds more 201 * metadata to the journal, you won't know, and will 202 * wind up waiting *a lot* longer than necessary. Right 203 * now we only use this in clear_inode so that's 204 * OK. */ 205 ocfs2_start_checkpoint(osb); 206 207 wait_event(osb->journal->j_checkpointed, 208 ocfs2_ci_fully_checkpointed(INODE_CACHE(inode))); 209 } 210 } 211 212 /* 213 * Transaction Handling: 214 * Manage the lifetime of a transaction handle. 215 * 216 * ocfs2_start_trans - Begin a transaction. Give it an upper estimate of 217 * the number of blocks that will be changed during 218 * this handle. 219 * ocfs2_commit_trans - Complete a handle. It might return -EIO if 220 * the journal was aborted. The majority of paths don't 221 * check the return value as an error there comes too 222 * late to do anything (and will be picked up in a 223 * later transaction). 224 * ocfs2_extend_trans - Extend a handle by nblocks credits. This may 225 * commit the handle to disk in the process, but will 226 * not release any locks taken during the transaction. 227 * ocfs2_journal_access* - Notify the handle that we want to journal this 228 * buffer. Will have to call ocfs2_journal_dirty once 229 * we've actually dirtied it. Type is one of . or . 230 * Always call the specific flavor of 231 * ocfs2_journal_access_*() unless you intend to 232 * manage the checksum by hand. 233 * ocfs2_journal_dirty - Mark a journalled buffer as having dirty data. 234 * ocfs2_jbd2_inode_add_write - Mark an inode with range so that its data goes 235 * out before the current handle commits. 236 */ 237 238 /* You must always start_trans with a number of buffs > 0, but it's 239 * perfectly legal to go through an entire transaction without having 240 * dirtied any buffers. */ 241 handle_t *ocfs2_start_trans(struct ocfs2_super *osb, 242 int max_buffs); 243 int ocfs2_commit_trans(struct ocfs2_super *osb, 244 handle_t *handle); 245 int ocfs2_extend_trans(handle_t *handle, int nblocks); 246 int ocfs2_allocate_extend_trans(handle_t *handle, 247 int thresh); 248 249 /* 250 * Define an arbitrary limit for the amount of data we will anticipate 251 * writing to any given transaction. For unbounded transactions such as 252 * fallocate(2) we can write more than this, but we always 253 * start off at the maximum transaction size and grow the transaction 254 * optimistically as we go. 255 */ 256 #define OCFS2_MAX_TRANS_DATA 64U 257 258 /* 259 * Create access is for when we get a newly created buffer and we're 260 * not gonna read it off disk, but rather fill it ourselves. Right 261 * now, we don't do anything special with this (it turns into a write 262 * request), but this is a good placeholder in case we do... 263 * 264 * Write access is for when we read a block off disk and are going to 265 * modify it. This way the journalling layer knows it may need to make 266 * a copy of that block (if it's part of another, uncommitted 267 * transaction) before we do so. 268 */ 269 #define OCFS2_JOURNAL_ACCESS_CREATE 0 270 #define OCFS2_JOURNAL_ACCESS_WRITE 1 271 #define OCFS2_JOURNAL_ACCESS_UNDO 2 272 273 274 /* ocfs2_inode */ 275 int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci, 276 struct buffer_head *bh, int type); 277 /* ocfs2_extent_block */ 278 int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci, 279 struct buffer_head *bh, int type); 280 /* ocfs2_refcount_block */ 281 int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci, 282 struct buffer_head *bh, int type); 283 /* ocfs2_group_desc */ 284 int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci, 285 struct buffer_head *bh, int type); 286 /* ocfs2_xattr_block */ 287 int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci, 288 struct buffer_head *bh, int type); 289 /* quota blocks */ 290 int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci, 291 struct buffer_head *bh, int type); 292 /* dirblock */ 293 int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci, 294 struct buffer_head *bh, int type); 295 /* ocfs2_dx_root_block */ 296 int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci, 297 struct buffer_head *bh, int type); 298 /* ocfs2_dx_leaf */ 299 int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci, 300 struct buffer_head *bh, int type); 301 /* Anything that has no ecc */ 302 int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci, 303 struct buffer_head *bh, int type); 304 305 /* 306 * A word about the journal_access/journal_dirty "dance". It is 307 * entirely legal to journal_access a buffer more than once (as long 308 * as the access type is the same -- I'm not sure what will happen if 309 * access type is different but this should never happen anyway) It is 310 * also legal to journal_dirty a buffer more than once. In fact, you 311 * can even journal_access a buffer after you've done a 312 * journal_access/journal_dirty pair. The only thing you cannot do 313 * however, is journal_dirty a buffer which you haven't yet passed to 314 * journal_access at least once. 315 * 316 * That said, 99% of the time this doesn't matter and this is what the 317 * path looks like: 318 * 319 * <read a bh> 320 * ocfs2_journal_access(handle, bh, OCFS2_JOURNAL_ACCESS_WRITE); 321 * <modify the bh> 322 * ocfs2_journal_dirty(handle, bh); 323 */ 324 void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh); 325 326 /* 327 * Credit Macros: 328 * Convenience macros to calculate number of credits needed. 329 * 330 * For convenience sake, I have a set of macros here which calculate 331 * the *maximum* number of sectors which will be changed for various 332 * metadata updates. 333 */ 334 335 /* simple file updates like chmod, etc. */ 336 #define OCFS2_INODE_UPDATE_CREDITS 1 337 338 /* extended attribute block update */ 339 #define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1 340 341 /* Update of a single quota block */ 342 #define OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 1 343 344 /* global quotafile inode update, data block */ 345 #define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \ 346 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 347 348 #define OCFS2_LOCAL_QINFO_WRITE_CREDITS OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 349 /* 350 * The two writes below can accidentally see global info dirty due 351 * to set_info() quotactl so make them prepared for the writes. 352 */ 353 /* quota data block, global info */ 354 /* Write to local quota file */ 355 #define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \ 356 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 357 358 /* global quota data block, local quota data block, global quota inode, 359 * global quota info */ 360 #define OCFS2_QSYNC_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \ 361 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 362 363 static inline int ocfs2_quota_trans_credits(struct super_block *sb) 364 { 365 int credits = 0; 366 367 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) 368 credits += OCFS2_QWRITE_CREDITS; 369 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) 370 credits += OCFS2_QWRITE_CREDITS; 371 return credits; 372 } 373 374 /* group extend. inode update and last group update. */ 375 #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 376 377 /* group add. inode update and the new group update. */ 378 #define OCFS2_GROUP_ADD_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 379 380 /* get one bit out of a suballocator: dinode + group descriptor + 381 * prev. group desc. if we relink. */ 382 #define OCFS2_SUBALLOC_ALLOC (3) 383 384 static inline int ocfs2_inline_to_extents_credits(struct super_block *sb) 385 { 386 return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS + 387 ocfs2_quota_trans_credits(sb); 388 } 389 390 /* dinode + group descriptor update. We don't relink on free yet. */ 391 #define OCFS2_SUBALLOC_FREE (2) 392 393 #define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS 394 #define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE \ 395 + OCFS2_TRUNCATE_LOG_UPDATE) 396 397 static inline int ocfs2_remove_extent_credits(struct super_block *sb) 398 { 399 return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS + 400 ocfs2_quota_trans_credits(sb); 401 } 402 403 /* data block for new dir/symlink, allocation of directory block, dx_root 404 * update for free list */ 405 #define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1) 406 407 static inline int ocfs2_add_dir_index_credits(struct super_block *sb) 408 { 409 /* 1 block for index, 2 allocs (data, metadata), 1 clusters 410 * worth of blocks for initial extent. */ 411 return 1 + 2 * OCFS2_SUBALLOC_ALLOC + 412 ocfs2_clusters_to_blocks(sb, 1); 413 } 414 415 /* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode 416 * alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr 417 * blocks + quota update */ 418 static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir, 419 int xattr_credits) 420 { 421 int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS; 422 423 if (is_dir) 424 dir_credits += ocfs2_add_dir_index_credits(sb); 425 426 return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits + 427 ocfs2_quota_trans_credits(sb); 428 } 429 430 /* local alloc metadata change + main bitmap updates */ 431 #define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS \ 432 + OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE) 433 434 /* used when we don't need an allocation change for a dir extend. One 435 * for the dinode, one for the new block. */ 436 #define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2) 437 438 /* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota 439 * update on dir + index leaf + dx root update for free list + 440 * previous dirblock update in the free list */ 441 static inline int ocfs2_link_credits(struct super_block *sb) 442 { 443 return 2 * OCFS2_INODE_UPDATE_CREDITS + 4 + 444 ocfs2_quota_trans_credits(sb); 445 } 446 447 /* inode + dir inode (if we unlink a dir), + dir entry block + orphan 448 * dir inode link + dir inode index leaf + dir index root */ 449 static inline int ocfs2_unlink_credits(struct super_block *sb) 450 { 451 /* The quota update from ocfs2_link_credits is unused here... */ 452 return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb); 453 } 454 455 /* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry + 456 * inode alloc group descriptor + orphan dir index root + 457 * orphan dir index leaf */ 458 #define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4) 459 460 /* dinode + orphan dir dinode + extent tree leaf block + orphan dir entry + 461 * orphan dir index root + orphan dir index leaf */ 462 #define OCFS2_INODE_ADD_TO_ORPHAN_CREDITS (2 * OCFS2_INODE_UPDATE_CREDITS + 4) 463 #define OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS OCFS2_INODE_ADD_TO_ORPHAN_CREDITS 464 465 /* dinode update, old dir dinode update, new dir dinode update, old 466 * dir dir entry, new dir dir entry, dir entry update for renaming 467 * directory + target unlink + 3 x dir index leaves */ 468 static inline int ocfs2_rename_credits(struct super_block *sb) 469 { 470 return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb); 471 } 472 473 /* global bitmap dinode, group desc., relinked group, 474 * suballocator dinode, group desc., relinked group, 475 * dinode, xattr block */ 476 #define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \ 477 + OCFS2_INODE_UPDATE_CREDITS \ 478 + OCFS2_XATTR_BLOCK_UPDATE_CREDITS) 479 480 /* inode update, removal of dx root block from allocator */ 481 #define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \ 482 OCFS2_SUBALLOC_FREE) 483 484 static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb) 485 { 486 int credits = 1 + OCFS2_SUBALLOC_ALLOC; 487 488 credits += ocfs2_clusters_to_blocks(sb, 1); 489 credits += ocfs2_quota_trans_credits(sb); 490 491 return credits; 492 } 493 494 /* inode update, new refcount block and its allocation credits. */ 495 #define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \ 496 + OCFS2_SUBALLOC_ALLOC) 497 498 /* inode and the refcount block update. */ 499 #define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 500 501 /* 502 * inode and the refcount block update. 503 * It doesn't include the credits for sub alloc change. 504 * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added. 505 */ 506 #define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 507 508 /* 2 metadata alloc, 2 new blocks and root refcount block */ 509 #define OCFS2_EXPAND_REFCOUNT_TREE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + 3) 510 511 /* 512 * Please note that the caller must make sure that root_el is the root 513 * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise 514 * the result may be wrong. 515 */ 516 static inline int ocfs2_calc_extend_credits(struct super_block *sb, 517 struct ocfs2_extent_list *root_el) 518 { 519 int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks; 520 521 /* bitmap dinode, group desc. + relinked group. */ 522 bitmap_blocks = OCFS2_SUBALLOC_ALLOC; 523 524 /* we might need to shift tree depth so lets assume an 525 * absolute worst case of complete fragmentation. Even with 526 * that, we only need one update for the dinode, and then 527 * however many metadata chunks needed * a remaining suballoc 528 * alloc. */ 529 sysfile_bitmap_blocks = 1 + 530 (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el); 531 532 /* this does not include *new* metadata blocks, which are 533 * accounted for in sysfile_bitmap_blocks. root_el + 534 * prev. last_eb_blk + blocks along edge of tree. 535 * calc_symlink_credits passes because we just need 1 536 * credit for the dinode there. */ 537 extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth); 538 539 return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks + 540 ocfs2_quota_trans_credits(sb); 541 } 542 543 static inline int ocfs2_calc_symlink_credits(struct super_block *sb) 544 { 545 int blocks = ocfs2_mknod_credits(sb, 0, 0); 546 547 /* links can be longer than one block so we may update many 548 * within our single allocated extent. */ 549 blocks += ocfs2_clusters_to_blocks(sb, 1); 550 551 return blocks + ocfs2_quota_trans_credits(sb); 552 } 553 554 static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb, 555 unsigned int cpg) 556 { 557 int blocks; 558 int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1; 559 /* parent inode update + new block group header + bitmap inode update 560 + bitmap blocks affected */ 561 blocks = 1 + 1 + 1 + bitmap_blocks; 562 return blocks; 563 } 564 565 /* 566 * Allocating a discontiguous block group requires the credits from 567 * ocfs2_calc_group_alloc_credits() as well as enough credits to fill 568 * the group descriptor's extent list. The caller already has started 569 * the transaction with ocfs2_calc_group_alloc_credits(). They extend 570 * it with these credits. 571 */ 572 static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb) 573 { 574 return ocfs2_extent_recs_per_gd(sb); 575 } 576 577 static inline int ocfs2_jbd2_inode_add_write(handle_t *handle, struct inode *inode, 578 loff_t start_byte, loff_t length) 579 { 580 return jbd2_journal_inode_ranged_write(handle, 581 &OCFS2_I(inode)->ip_jinode, 582 start_byte, length); 583 } 584 585 static inline int ocfs2_begin_ordered_truncate(struct inode *inode, 586 loff_t new_size) 587 { 588 return jbd2_journal_begin_ordered_truncate( 589 OCFS2_SB(inode->i_sb)->journal->j_journal, 590 &OCFS2_I(inode)->ip_jinode, 591 new_size); 592 } 593 594 static inline void ocfs2_update_inode_fsync_trans(handle_t *handle, 595 struct inode *inode, 596 int datasync) 597 { 598 struct ocfs2_inode_info *oi = OCFS2_I(inode); 599 600 oi->i_sync_tid = handle->h_transaction->t_tid; 601 if (datasync) 602 oi->i_datasync_tid = handle->h_transaction->t_tid; 603 } 604 605 #endif /* OCFS2_JOURNAL_H */ 606