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 void ocfs2_orphan_scan_exit(struct ocfs2_super *osb); 148 149 void ocfs2_complete_recovery(struct work_struct *work); 150 void ocfs2_wait_for_recovery(struct ocfs2_super *osb); 151 152 int ocfs2_recovery_init(struct ocfs2_super *osb); 153 void ocfs2_recovery_exit(struct ocfs2_super *osb); 154 155 int ocfs2_compute_replay_slots(struct ocfs2_super *osb); 156 /* 157 * Journal Control: 158 * Initialize, Load, Shutdown, Wipe a journal. 159 * 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 */ 172 void ocfs2_set_journal_params(struct ocfs2_super *osb); 173 int ocfs2_journal_init(struct ocfs2_journal *journal, 174 int *dirty); 175 void ocfs2_journal_shutdown(struct ocfs2_super *osb); 176 int ocfs2_journal_wipe(struct ocfs2_journal *journal, 177 int full); 178 int ocfs2_journal_load(struct ocfs2_journal *journal, int local, 179 int replayed); 180 int ocfs2_check_journals_nolocks(struct ocfs2_super *osb); 181 void ocfs2_recovery_thread(struct ocfs2_super *osb, 182 int node_num); 183 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb); 184 void ocfs2_complete_mount_recovery(struct ocfs2_super *osb); 185 void ocfs2_complete_quota_recovery(struct ocfs2_super *osb); 186 187 static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb) 188 { 189 wake_up(&osb->checkpoint_event); 190 } 191 192 static 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_file_inode - Mark an inode so that its data goes out before 236 * 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. */ 242 handle_t *ocfs2_start_trans(struct ocfs2_super *osb, 243 int max_buffs); 244 int ocfs2_commit_trans(struct ocfs2_super *osb, 245 handle_t *handle); 246 int ocfs2_extend_trans(handle_t *handle, int nblocks); 247 int ocfs2_allocate_extend_trans(handle_t *handle, 248 int thresh); 249 250 /* 251 * Define an arbitrary limit for the amount of data we will anticipate 252 * writing to any given transaction. For unbounded transactions such as 253 * fallocate(2) we can write more than this, but we always 254 * start off at the maximum transaction size and grow the transaction 255 * optimistically as we go. 256 */ 257 #define OCFS2_MAX_TRANS_DATA 64U 258 259 /* 260 * Create access is for when we get a newly created buffer and we're 261 * not gonna read it off disk, but rather fill it ourselves. Right 262 * now, we don't do anything special with this (it turns into a write 263 * request), but this is a good placeholder in case we do... 264 * 265 * Write access is for when we read a block off disk and are going to 266 * modify it. This way the journalling layer knows it may need to make 267 * a copy of that block (if it's part of another, uncommitted 268 * transaction) before we do so. 269 */ 270 #define OCFS2_JOURNAL_ACCESS_CREATE 0 271 #define OCFS2_JOURNAL_ACCESS_WRITE 1 272 #define OCFS2_JOURNAL_ACCESS_UNDO 2 273 274 275 /* ocfs2_inode */ 276 int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci, 277 struct buffer_head *bh, int type); 278 /* ocfs2_extent_block */ 279 int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci, 280 struct buffer_head *bh, int type); 281 /* ocfs2_refcount_block */ 282 int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci, 283 struct buffer_head *bh, int type); 284 /* ocfs2_group_desc */ 285 int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci, 286 struct buffer_head *bh, int type); 287 /* ocfs2_xattr_block */ 288 int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci, 289 struct buffer_head *bh, int type); 290 /* quota blocks */ 291 int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci, 292 struct buffer_head *bh, int type); 293 /* dirblock */ 294 int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci, 295 struct buffer_head *bh, int type); 296 /* ocfs2_dx_root_block */ 297 int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci, 298 struct buffer_head *bh, int type); 299 /* ocfs2_dx_leaf */ 300 int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci, 301 struct buffer_head *bh, int type); 302 /* Anything that has no ecc */ 303 int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci, 304 struct buffer_head *bh, int type); 305 306 /* 307 * A word about the journal_access/journal_dirty "dance". It is 308 * entirely legal to journal_access a buffer more than once (as long 309 * as the access type is the same -- I'm not sure what will happen if 310 * access type is different but this should never happen anyway) It is 311 * also legal to journal_dirty a buffer more than once. In fact, you 312 * can even journal_access a buffer after you've done a 313 * journal_access/journal_dirty pair. The only thing you cannot do 314 * however, is journal_dirty a buffer which you haven't yet passed to 315 * journal_access at least once. 316 * 317 * That said, 99% of the time this doesn't matter and this is what the 318 * path looks like: 319 * 320 * <read a bh> 321 * ocfs2_journal_access(handle, bh, OCFS2_JOURNAL_ACCESS_WRITE); 322 * <modify the bh> 323 * ocfs2_journal_dirty(handle, bh); 324 */ 325 void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh); 326 327 /* 328 * Credit Macros: 329 * Convenience macros to calculate number of credits needed. 330 * 331 * For convenience sake, I have a set of macros here which calculate 332 * the *maximum* number of sectors which will be changed for various 333 * metadata updates. 334 */ 335 336 /* simple file updates like chmod, etc. */ 337 #define OCFS2_INODE_UPDATE_CREDITS 1 338 339 /* extended attribute block update */ 340 #define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1 341 342 /* Update of a single quota block */ 343 #define OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 1 344 345 /* global quotafile inode update, data block */ 346 #define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \ 347 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 348 349 #define OCFS2_LOCAL_QINFO_WRITE_CREDITS OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 350 /* 351 * The two writes below can accidentally see global info dirty due 352 * to set_info() quotactl so make them prepared for the writes. 353 */ 354 /* quota data block, global info */ 355 /* Write to local quota file */ 356 #define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \ 357 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 358 359 /* global quota data block, local quota data block, global quota inode, 360 * global quota info */ 361 #define OCFS2_QSYNC_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \ 362 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 363 364 static inline int ocfs2_quota_trans_credits(struct super_block *sb) 365 { 366 int credits = 0; 367 368 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) 369 credits += OCFS2_QWRITE_CREDITS; 370 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) 371 credits += OCFS2_QWRITE_CREDITS; 372 return credits; 373 } 374 375 /* group extend. inode update and last group update. */ 376 #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 377 378 /* group add. inode update and the new group update. */ 379 #define OCFS2_GROUP_ADD_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 380 381 /* get one bit out of a suballocator: dinode + group descriptor + 382 * prev. group desc. if we relink. */ 383 #define OCFS2_SUBALLOC_ALLOC (3) 384 385 static inline int ocfs2_inline_to_extents_credits(struct super_block *sb) 386 { 387 return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS + 388 ocfs2_quota_trans_credits(sb); 389 } 390 391 /* dinode + group descriptor update. We don't relink on free yet. */ 392 #define OCFS2_SUBALLOC_FREE (2) 393 394 #define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS 395 #define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE \ 396 + OCFS2_TRUNCATE_LOG_UPDATE) 397 398 static inline int ocfs2_remove_extent_credits(struct super_block *sb) 399 { 400 return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS + 401 ocfs2_quota_trans_credits(sb); 402 } 403 404 /* data block for new dir/symlink, allocation of directory block, dx_root 405 * update for free list */ 406 #define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1) 407 408 static inline int ocfs2_add_dir_index_credits(struct super_block *sb) 409 { 410 /* 1 block for index, 2 allocs (data, metadata), 1 clusters 411 * worth of blocks for initial extent. */ 412 return 1 + 2 * OCFS2_SUBALLOC_ALLOC + 413 ocfs2_clusters_to_blocks(sb, 1); 414 } 415 416 /* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode 417 * alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr 418 * blocks + quota update */ 419 static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir, 420 int xattr_credits) 421 { 422 int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS; 423 424 if (is_dir) 425 dir_credits += ocfs2_add_dir_index_credits(sb); 426 427 return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits + 428 ocfs2_quota_trans_credits(sb); 429 } 430 431 /* local alloc metadata change + main bitmap updates */ 432 #define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS \ 433 + OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE) 434 435 /* used when we don't need an allocation change for a dir extend. One 436 * for the dinode, one for the new block. */ 437 #define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2) 438 439 /* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota 440 * update on dir + index leaf + dx root update for free list + 441 * previous dirblock update in the free list */ 442 static inline int ocfs2_link_credits(struct super_block *sb) 443 { 444 return 2*OCFS2_INODE_UPDATE_CREDITS + 4 + 445 ocfs2_quota_trans_credits(sb); 446 } 447 448 /* inode + dir inode (if we unlink a dir), + dir entry block + orphan 449 * dir inode link + dir inode index leaf + dir index root */ 450 static inline int ocfs2_unlink_credits(struct super_block *sb) 451 { 452 /* The quota update from ocfs2_link_credits is unused here... */ 453 return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb); 454 } 455 456 /* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry + 457 * inode alloc group descriptor + orphan dir index root + 458 * orphan dir index leaf */ 459 #define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4) 460 461 /* dinode + orphan dir dinode + extent tree leaf block + orphan dir entry + 462 * orphan dir index root + orphan dir index leaf */ 463 #define OCFS2_INODE_ADD_TO_ORPHAN_CREDITS (2 * OCFS2_INODE_UPDATE_CREDITS + 4) 464 #define OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS OCFS2_INODE_ADD_TO_ORPHAN_CREDITS 465 466 /* dinode update, old dir dinode update, new dir dinode update, old 467 * dir dir entry, new dir dir entry, dir entry update for renaming 468 * directory + target unlink + 3 x dir index leaves */ 469 static inline int ocfs2_rename_credits(struct super_block *sb) 470 { 471 return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb); 472 } 473 474 /* global bitmap dinode, group desc., relinked group, 475 * suballocator dinode, group desc., relinked group, 476 * dinode, xattr block */ 477 #define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \ 478 + OCFS2_INODE_UPDATE_CREDITS \ 479 + OCFS2_XATTR_BLOCK_UPDATE_CREDITS) 480 481 /* inode update, removal of dx root block from allocator */ 482 #define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \ 483 OCFS2_SUBALLOC_FREE) 484 485 static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb) 486 { 487 int credits = 1 + OCFS2_SUBALLOC_ALLOC; 488 489 credits += ocfs2_clusters_to_blocks(sb, 1); 490 credits += ocfs2_quota_trans_credits(sb); 491 492 return credits; 493 } 494 495 /* inode update, new refcount block and its allocation credits. */ 496 #define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \ 497 + OCFS2_SUBALLOC_ALLOC) 498 499 /* inode and the refcount block update. */ 500 #define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 501 502 /* 503 * inode and the refcount block update. 504 * It doesn't include the credits for sub alloc change. 505 * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added. 506 */ 507 #define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 508 509 /* 2 metadata alloc, 2 new blocks and root refcount block */ 510 #define OCFS2_EXPAND_REFCOUNT_TREE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + 3) 511 512 /* 513 * Please note that the caller must make sure that root_el is the root 514 * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise 515 * the result may be wrong. 516 */ 517 static inline int ocfs2_calc_extend_credits(struct super_block *sb, 518 struct ocfs2_extent_list *root_el) 519 { 520 int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks; 521 522 /* bitmap dinode, group desc. + relinked group. */ 523 bitmap_blocks = OCFS2_SUBALLOC_ALLOC; 524 525 /* we might need to shift tree depth so lets assume an 526 * absolute worst case of complete fragmentation. Even with 527 * that, we only need one update for the dinode, and then 528 * however many metadata chunks needed * a remaining suballoc 529 * alloc. */ 530 sysfile_bitmap_blocks = 1 + 531 (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el); 532 533 /* this does not include *new* metadata blocks, which are 534 * accounted for in sysfile_bitmap_blocks. root_el + 535 * prev. last_eb_blk + blocks along edge of tree. 536 * calc_symlink_credits passes because we just need 1 537 * credit for the dinode there. */ 538 extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth); 539 540 return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks + 541 ocfs2_quota_trans_credits(sb); 542 } 543 544 static inline int ocfs2_calc_symlink_credits(struct super_block *sb) 545 { 546 int blocks = ocfs2_mknod_credits(sb, 0, 0); 547 548 /* links can be longer than one block so we may update many 549 * within our single allocated extent. */ 550 blocks += ocfs2_clusters_to_blocks(sb, 1); 551 552 return blocks + ocfs2_quota_trans_credits(sb); 553 } 554 555 static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb, 556 unsigned int cpg) 557 { 558 int blocks; 559 int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1; 560 /* parent inode update + new block group header + bitmap inode update 561 + bitmap blocks affected */ 562 blocks = 1 + 1 + 1 + bitmap_blocks; 563 return blocks; 564 } 565 566 /* 567 * Allocating a discontiguous block group requires the credits from 568 * ocfs2_calc_group_alloc_credits() as well as enough credits to fill 569 * the group descriptor's extent list. The caller already has started 570 * the transaction with ocfs2_calc_group_alloc_credits(). They extend 571 * it with these credits. 572 */ 573 static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb) 574 { 575 return ocfs2_extent_recs_per_gd(sb); 576 } 577 578 static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb, 579 unsigned int clusters_to_del, 580 struct ocfs2_dinode *fe, 581 struct ocfs2_extent_list *last_el) 582 { 583 /* for dinode + all headers in this pass + update to next leaf */ 584 u16 next_free = le16_to_cpu(last_el->l_next_free_rec); 585 u16 tree_depth = le16_to_cpu(fe->id2.i_list.l_tree_depth); 586 int credits = 1 + tree_depth + 1; 587 int i; 588 589 i = next_free - 1; 590 BUG_ON(i < 0); 591 592 /* We may be deleting metadata blocks, so metadata alloc dinode + 593 one desc. block for each possible delete. */ 594 if (tree_depth && next_free == 1 && 595 ocfs2_rec_clusters(last_el, &last_el->l_recs[i]) == clusters_to_del) 596 credits += 1 + tree_depth; 597 598 /* update to the truncate log. */ 599 credits += OCFS2_TRUNCATE_LOG_UPDATE; 600 601 credits += ocfs2_quota_trans_credits(sb); 602 603 return credits; 604 } 605 606 static inline int ocfs2_jbd2_file_inode(handle_t *handle, struct inode *inode) 607 { 608 return jbd2_journal_inode_add_write(handle, &OCFS2_I(inode)->ip_jinode); 609 } 610 611 static inline int ocfs2_begin_ordered_truncate(struct inode *inode, 612 loff_t new_size) 613 { 614 return jbd2_journal_begin_ordered_truncate( 615 OCFS2_SB(inode->i_sb)->journal->j_journal, 616 &OCFS2_I(inode)->ip_jinode, 617 new_size); 618 } 619 620 static inline void ocfs2_update_inode_fsync_trans(handle_t *handle, 621 struct inode *inode, 622 int datasync) 623 { 624 struct ocfs2_inode_info *oi = OCFS2_I(inode); 625 626 oi->i_sync_tid = handle->h_transaction->t_tid; 627 if (datasync) 628 oi->i_datasync_tid = handle->h_transaction->t_tid; 629 } 630 631 #endif /* OCFS2_JOURNAL_H */ 632