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. */ ocfs2_inc_trans_id(struct ocfs2_journal * j)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 ocfs2_set_ci_lock_trans(struct ocfs2_journal * journal,struct ocfs2_caching_info * ci)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. */ ocfs2_ci_fully_checkpointed(struct ocfs2_caching_info * ci)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. */ ocfs2_ci_is_new(struct ocfs2_caching_info * ci)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 */ ocfs2_inode_is_new(struct inode * inode)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 ocfs2_ci_set_new(struct ocfs2_super * osb,struct ocfs2_caching_info * ci)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 void ocfs2_free_replay_slots(struct ocfs2_super *osb); 154 /* 155 * Journal Control: 156 * Initialize, Load, Shutdown, Wipe a journal. 157 * 158 * ocfs2_journal_alloc - Initialize skeleton for journal structure. 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_alloc(struct ocfs2_super *osb); 173 int ocfs2_journal_init(struct ocfs2_super *osb, 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 ocfs2_start_checkpoint(struct ocfs2_super * osb)186 static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb) 187 { 188 wake_up(&osb->checkpoint_event); 189 } 190 ocfs2_checkpoint_inode(struct inode * inode)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_assure_trans_credits(handle_t *handle, 247 int nblocks); 248 int ocfs2_allocate_extend_trans(handle_t *handle, 249 int thresh); 250 251 /* 252 * Define an arbitrary limit for the amount of data we will anticipate 253 * writing to any given transaction. For unbounded transactions such as 254 * fallocate(2) we can write more than this, but we always 255 * start off at the maximum transaction size and grow the transaction 256 * optimistically as we go. 257 */ 258 #define OCFS2_MAX_TRANS_DATA 64U 259 260 /* 261 * Create access is for when we get a newly created buffer and we're 262 * not gonna read it off disk, but rather fill it ourselves. Right 263 * now, we don't do anything special with this (it turns into a write 264 * request), but this is a good placeholder in case we do... 265 * 266 * Write access is for when we read a block off disk and are going to 267 * modify it. This way the journalling layer knows it may need to make 268 * a copy of that block (if it's part of another, uncommitted 269 * transaction) before we do so. 270 */ 271 #define OCFS2_JOURNAL_ACCESS_CREATE 0 272 #define OCFS2_JOURNAL_ACCESS_WRITE 1 273 #define OCFS2_JOURNAL_ACCESS_UNDO 2 274 275 276 /* ocfs2_inode */ 277 int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci, 278 struct buffer_head *bh, int type); 279 /* ocfs2_extent_block */ 280 int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci, 281 struct buffer_head *bh, int type); 282 /* ocfs2_refcount_block */ 283 int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci, 284 struct buffer_head *bh, int type); 285 /* ocfs2_group_desc */ 286 int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci, 287 struct buffer_head *bh, int type); 288 /* ocfs2_xattr_block */ 289 int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci, 290 struct buffer_head *bh, int type); 291 /* quota blocks */ 292 int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci, 293 struct buffer_head *bh, int type); 294 /* dirblock */ 295 int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci, 296 struct buffer_head *bh, int type); 297 /* ocfs2_dx_root_block */ 298 int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci, 299 struct buffer_head *bh, int type); 300 /* ocfs2_dx_leaf */ 301 int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci, 302 struct buffer_head *bh, int type); 303 /* Anything that has no ecc */ 304 int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci, 305 struct buffer_head *bh, int type); 306 307 /* 308 * A word about the journal_access/journal_dirty "dance". It is 309 * entirely legal to journal_access a buffer more than once (as long 310 * as the access type is the same -- I'm not sure what will happen if 311 * access type is different but this should never happen anyway) It is 312 * also legal to journal_dirty a buffer more than once. In fact, you 313 * can even journal_access a buffer after you've done a 314 * journal_access/journal_dirty pair. The only thing you cannot do 315 * however, is journal_dirty a buffer which you haven't yet passed to 316 * journal_access at least once. 317 * 318 * That said, 99% of the time this doesn't matter and this is what the 319 * path looks like: 320 * 321 * <read a bh> 322 * ocfs2_journal_access(handle, bh, OCFS2_JOURNAL_ACCESS_WRITE); 323 * <modify the bh> 324 * ocfs2_journal_dirty(handle, bh); 325 */ 326 void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh); 327 328 /* 329 * Credit Macros: 330 * Convenience macros to calculate number of credits needed. 331 * 332 * For convenience sake, I have a set of macros here which calculate 333 * the *maximum* number of sectors which will be changed for various 334 * metadata updates. 335 */ 336 337 /* simple file updates like chmod, etc. */ 338 #define OCFS2_INODE_UPDATE_CREDITS 1 339 340 /* extended attribute block update */ 341 #define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1 342 343 /* Update of a single quota block */ 344 #define OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 1 345 346 /* global quotafile inode update, data block */ 347 #define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \ 348 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 349 350 #define OCFS2_LOCAL_QINFO_WRITE_CREDITS OCFS2_QUOTA_BLOCK_UPDATE_CREDITS 351 /* 352 * The two writes below can accidentally see global info dirty due 353 * to set_info() quotactl so make them prepared for the writes. 354 */ 355 /* quota data block, global info */ 356 /* Write to local quota file */ 357 #define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \ 358 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 359 360 /* global quota data block, local quota data block, global quota inode, 361 * global quota info */ 362 #define OCFS2_QSYNC_CREDITS (OCFS2_QINFO_WRITE_CREDITS + \ 363 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS) 364 ocfs2_quota_trans_credits(struct super_block * sb)365 static inline int ocfs2_quota_trans_credits(struct super_block *sb) 366 { 367 int credits = 0; 368 369 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) 370 credits += OCFS2_QWRITE_CREDITS; 371 if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) 372 credits += OCFS2_QWRITE_CREDITS; 373 return credits; 374 } 375 376 /* group extend. inode update and last group update. */ 377 #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 378 379 /* group add. inode update and the new group update. */ 380 #define OCFS2_GROUP_ADD_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 381 382 /* get one bit out of a suballocator: dinode + group descriptor + 383 * prev. group desc. if we relink. */ 384 #define OCFS2_SUBALLOC_ALLOC (3) 385 ocfs2_inline_to_extents_credits(struct super_block * sb)386 static inline int ocfs2_inline_to_extents_credits(struct super_block *sb) 387 { 388 return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS + 389 ocfs2_quota_trans_credits(sb); 390 } 391 392 /* dinode + group descriptor update. We don't relink on free yet. */ 393 #define OCFS2_SUBALLOC_FREE (2) 394 395 #define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS 396 #define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE \ 397 + OCFS2_TRUNCATE_LOG_UPDATE) 398 ocfs2_remove_extent_credits(struct super_block * sb)399 static inline int ocfs2_remove_extent_credits(struct super_block *sb) 400 { 401 return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS + 402 ocfs2_quota_trans_credits(sb); 403 } 404 405 /* data block for new dir/symlink, allocation of directory block, dx_root 406 * update for free list */ 407 #define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + OCFS2_SUBALLOC_ALLOC + 1) 408 ocfs2_add_dir_index_credits(struct super_block * sb)409 static inline int ocfs2_add_dir_index_credits(struct super_block *sb) 410 { 411 /* 1 block for index, 2 allocs (data, metadata), 1 clusters 412 * worth of blocks for initial extent. */ 413 return 1 + 2 * OCFS2_SUBALLOC_ALLOC + 414 ocfs2_clusters_to_blocks(sb, 1); 415 } 416 417 /* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode 418 * alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr 419 * blocks + quota update */ ocfs2_mknod_credits(struct super_block * sb,int is_dir,int xattr_credits)420 static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir, 421 int xattr_credits) 422 { 423 int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS; 424 425 if (is_dir) 426 dir_credits += ocfs2_add_dir_index_credits(sb); 427 428 return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits + 429 ocfs2_quota_trans_credits(sb); 430 } 431 432 /* local alloc metadata change + main bitmap updates */ 433 #define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS \ 434 + OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE) 435 436 /* used when we don't need an allocation change for a dir extend. One 437 * for the dinode, one for the new block. */ 438 #define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2) 439 440 /* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota 441 * update on dir + index leaf + dx root update for free list + 442 * previous dirblock update in the free list */ ocfs2_link_credits(struct super_block * sb)443 static inline int ocfs2_link_credits(struct super_block *sb) 444 { 445 return 2 * OCFS2_INODE_UPDATE_CREDITS + 4 + 446 ocfs2_quota_trans_credits(sb); 447 } 448 449 /* inode + dir inode (if we unlink a dir), + dir entry block + orphan 450 * dir inode link + dir inode index leaf + dir index root */ ocfs2_unlink_credits(struct super_block * sb)451 static inline int ocfs2_unlink_credits(struct super_block *sb) 452 { 453 /* The quota update from ocfs2_link_credits is unused here... */ 454 return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb); 455 } 456 457 /* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry + 458 * inode alloc group descriptor + orphan dir index root + 459 * orphan dir index leaf */ 460 #define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4) 461 462 /* dinode + orphan dir dinode + extent tree leaf block + orphan dir entry + 463 * orphan dir index root + orphan dir index leaf */ 464 #define OCFS2_INODE_ADD_TO_ORPHAN_CREDITS (2 * OCFS2_INODE_UPDATE_CREDITS + 4) 465 #define OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS OCFS2_INODE_ADD_TO_ORPHAN_CREDITS 466 467 /* dinode update, old dir dinode update, new dir dinode update, old 468 * dir dir entry, new dir dir entry, dir entry update for renaming 469 * directory + target unlink + 3 x dir index leaves */ ocfs2_rename_credits(struct super_block * sb)470 static inline int ocfs2_rename_credits(struct super_block *sb) 471 { 472 return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb); 473 } 474 475 /* global bitmap dinode, group desc., relinked group, 476 * suballocator dinode, group desc., relinked group, 477 * dinode, xattr block */ 478 #define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \ 479 + OCFS2_INODE_UPDATE_CREDITS \ 480 + OCFS2_XATTR_BLOCK_UPDATE_CREDITS) 481 482 /* inode update, removal of dx root block from allocator */ 483 #define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \ 484 OCFS2_SUBALLOC_FREE) 485 ocfs2_calc_dxi_expand_credits(struct super_block * sb)486 static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb) 487 { 488 int credits = 1 + OCFS2_SUBALLOC_ALLOC; 489 490 credits += ocfs2_clusters_to_blocks(sb, 1); 491 credits += ocfs2_quota_trans_credits(sb); 492 493 return credits; 494 } 495 496 /* inode update, new refcount block and its allocation credits. */ 497 #define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \ 498 + OCFS2_SUBALLOC_ALLOC) 499 500 /* inode and the refcount block update. */ 501 #define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 502 503 /* 504 * inode and the refcount block update. 505 * It doesn't include the credits for sub alloc change. 506 * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added. 507 */ 508 #define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) 509 510 /* 2 metadata alloc, 2 new blocks and root refcount block */ 511 #define OCFS2_EXPAND_REFCOUNT_TREE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + 3) 512 513 /* 514 * Please note that the caller must make sure that root_el is the root 515 * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise 516 * the result may be wrong. 517 */ ocfs2_calc_extend_credits(struct super_block * sb,struct ocfs2_extent_list * root_el)518 static inline int ocfs2_calc_extend_credits(struct super_block *sb, 519 struct ocfs2_extent_list *root_el) 520 { 521 int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks; 522 523 /* bitmap dinode, group desc. + relinked group. */ 524 bitmap_blocks = OCFS2_SUBALLOC_ALLOC; 525 526 /* we might need to shift tree depth so lets assume an 527 * absolute worst case of complete fragmentation. Even with 528 * that, we only need one update for the dinode, and then 529 * however many metadata chunks needed * a remaining suballoc 530 * alloc. */ 531 sysfile_bitmap_blocks = 1 + 532 (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el); 533 534 /* this does not include *new* metadata blocks, which are 535 * accounted for in sysfile_bitmap_blocks. root_el + 536 * prev. last_eb_blk + blocks along edge of tree. 537 * calc_symlink_credits passes because we just need 1 538 * credit for the dinode there. */ 539 extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth); 540 541 return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks + 542 ocfs2_quota_trans_credits(sb); 543 } 544 ocfs2_calc_symlink_credits(struct super_block * sb)545 static inline int ocfs2_calc_symlink_credits(struct super_block *sb) 546 { 547 int blocks = ocfs2_mknod_credits(sb, 0, 0); 548 549 /* links can be longer than one block so we may update many 550 * within our single allocated extent. */ 551 blocks += ocfs2_clusters_to_blocks(sb, 1); 552 553 return blocks + ocfs2_quota_trans_credits(sb); 554 } 555 ocfs2_calc_group_alloc_credits(struct super_block * sb,unsigned int cpg)556 static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb, 557 unsigned int cpg) 558 { 559 int blocks; 560 int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1; 561 /* parent inode update + new block group header + bitmap inode update 562 + bitmap blocks affected */ 563 blocks = 1 + 1 + 1 + bitmap_blocks; 564 return blocks; 565 } 566 567 /* 568 * Allocating a discontiguous block group requires the credits from 569 * ocfs2_calc_group_alloc_credits() as well as enough credits to fill 570 * the group descriptor's extent list. The caller already has started 571 * the transaction with ocfs2_calc_group_alloc_credits(). They extend 572 * it with these credits. 573 */ ocfs2_calc_bg_discontig_credits(struct super_block * sb)574 static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb) 575 { 576 return ocfs2_extent_recs_per_gd(sb); 577 } 578 ocfs2_jbd2_inode_add_write(handle_t * handle,struct inode * inode,loff_t start_byte,loff_t length)579 static inline int ocfs2_jbd2_inode_add_write(handle_t *handle, struct inode *inode, 580 loff_t start_byte, loff_t length) 581 { 582 return jbd2_journal_inode_ranged_write(handle, 583 &OCFS2_I(inode)->ip_jinode, 584 start_byte, length); 585 } 586 ocfs2_begin_ordered_truncate(struct inode * inode,loff_t new_size)587 static inline int ocfs2_begin_ordered_truncate(struct inode *inode, 588 loff_t new_size) 589 { 590 return jbd2_journal_begin_ordered_truncate( 591 OCFS2_SB(inode->i_sb)->journal->j_journal, 592 &OCFS2_I(inode)->ip_jinode, 593 new_size); 594 } 595 ocfs2_update_inode_fsync_trans(handle_t * handle,struct inode * inode,int datasync)596 static inline void ocfs2_update_inode_fsync_trans(handle_t *handle, 597 struct inode *inode, 598 int datasync) 599 { 600 struct ocfs2_inode_info *oi = OCFS2_I(inode); 601 602 if (!is_handle_aborted(handle)) { 603 oi->i_sync_tid = handle->h_transaction->t_tid; 604 if (datasync) 605 oi->i_datasync_tid = handle->h_transaction->t_tid; 606 } 607 } 608 609 #endif /* OCFS2_JOURNAL_H */ 610