1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * inode.c 5 * 6 * vfs' aops, fops, dops and iops 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/fs.h> 27 #include <linux/types.h> 28 #include <linux/highmem.h> 29 #include <linux/pagemap.h> 30 #include <linux/quotaops.h> 31 32 #include <asm/byteorder.h> 33 34 #include <cluster/masklog.h> 35 36 #include "ocfs2.h" 37 38 #include "alloc.h" 39 #include "dir.h" 40 #include "blockcheck.h" 41 #include "dlmglue.h" 42 #include "extent_map.h" 43 #include "file.h" 44 #include "heartbeat.h" 45 #include "inode.h" 46 #include "journal.h" 47 #include "namei.h" 48 #include "suballoc.h" 49 #include "super.h" 50 #include "symlink.h" 51 #include "sysfile.h" 52 #include "uptodate.h" 53 #include "xattr.h" 54 #include "refcounttree.h" 55 #include "ocfs2_trace.h" 56 57 #include "buffer_head_io.h" 58 59 struct ocfs2_find_inode_args 60 { 61 u64 fi_blkno; 62 unsigned long fi_ino; 63 unsigned int fi_flags; 64 unsigned int fi_sysfile_type; 65 }; 66 67 static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES]; 68 69 static int ocfs2_read_locked_inode(struct inode *inode, 70 struct ocfs2_find_inode_args *args); 71 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque); 72 static int ocfs2_find_actor(struct inode *inode, void *opaque); 73 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, 74 struct inode *inode, 75 struct buffer_head *fe_bh); 76 77 void ocfs2_set_inode_flags(struct inode *inode) 78 { 79 unsigned int flags = OCFS2_I(inode)->ip_attr; 80 81 inode->i_flags &= ~(S_IMMUTABLE | 82 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC); 83 84 if (flags & OCFS2_IMMUTABLE_FL) 85 inode->i_flags |= S_IMMUTABLE; 86 87 if (flags & OCFS2_SYNC_FL) 88 inode->i_flags |= S_SYNC; 89 if (flags & OCFS2_APPEND_FL) 90 inode->i_flags |= S_APPEND; 91 if (flags & OCFS2_NOATIME_FL) 92 inode->i_flags |= S_NOATIME; 93 if (flags & OCFS2_DIRSYNC_FL) 94 inode->i_flags |= S_DIRSYNC; 95 } 96 97 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */ 98 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi) 99 { 100 unsigned int flags = oi->vfs_inode.i_flags; 101 102 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL| 103 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL); 104 if (flags & S_SYNC) 105 oi->ip_attr |= OCFS2_SYNC_FL; 106 if (flags & S_APPEND) 107 oi->ip_attr |= OCFS2_APPEND_FL; 108 if (flags & S_IMMUTABLE) 109 oi->ip_attr |= OCFS2_IMMUTABLE_FL; 110 if (flags & S_NOATIME) 111 oi->ip_attr |= OCFS2_NOATIME_FL; 112 if (flags & S_DIRSYNC) 113 oi->ip_attr |= OCFS2_DIRSYNC_FL; 114 } 115 116 struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno) 117 { 118 struct ocfs2_find_inode_args args; 119 120 args.fi_blkno = blkno; 121 args.fi_flags = 0; 122 args.fi_ino = ino_from_blkno(sb, blkno); 123 args.fi_sysfile_type = 0; 124 125 return ilookup5(sb, blkno, ocfs2_find_actor, &args); 126 } 127 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags, 128 int sysfile_type) 129 { 130 struct inode *inode = NULL; 131 struct super_block *sb = osb->sb; 132 struct ocfs2_find_inode_args args; 133 journal_t *journal = OCFS2_SB(sb)->journal->j_journal; 134 135 trace_ocfs2_iget_begin((unsigned long long)blkno, flags, 136 sysfile_type); 137 138 /* Ok. By now we've either got the offsets passed to us by the 139 * caller, or we just pulled them off the bh. Lets do some 140 * sanity checks to make sure they're OK. */ 141 if (blkno == 0) { 142 inode = ERR_PTR(-EINVAL); 143 mlog_errno(PTR_ERR(inode)); 144 goto bail; 145 } 146 147 args.fi_blkno = blkno; 148 args.fi_flags = flags; 149 args.fi_ino = ino_from_blkno(sb, blkno); 150 args.fi_sysfile_type = sysfile_type; 151 152 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor, 153 ocfs2_init_locked_inode, &args); 154 /* inode was *not* in the inode cache. 2.6.x requires 155 * us to do our own read_inode call and unlock it 156 * afterwards. */ 157 if (inode == NULL) { 158 inode = ERR_PTR(-ENOMEM); 159 mlog_errno(PTR_ERR(inode)); 160 goto bail; 161 } 162 trace_ocfs2_iget5_locked(inode->i_state); 163 if (inode->i_state & I_NEW) { 164 ocfs2_read_locked_inode(inode, &args); 165 unlock_new_inode(inode); 166 } 167 if (is_bad_inode(inode)) { 168 iput(inode); 169 inode = ERR_PTR(-ESTALE); 170 goto bail; 171 } 172 173 /* 174 * Set transaction id's of transactions that have to be committed 175 * to finish f[data]sync. We set them to currently running transaction 176 * as we cannot be sure that the inode or some of its metadata isn't 177 * part of the transaction - the inode could have been reclaimed and 178 * now it is reread from disk. 179 */ 180 if (journal) { 181 transaction_t *transaction; 182 tid_t tid; 183 struct ocfs2_inode_info *oi = OCFS2_I(inode); 184 185 read_lock(&journal->j_state_lock); 186 if (journal->j_running_transaction) 187 transaction = journal->j_running_transaction; 188 else 189 transaction = journal->j_committing_transaction; 190 if (transaction) 191 tid = transaction->t_tid; 192 else 193 tid = journal->j_commit_sequence; 194 read_unlock(&journal->j_state_lock); 195 oi->i_sync_tid = tid; 196 oi->i_datasync_tid = tid; 197 } 198 199 bail: 200 if (!IS_ERR(inode)) { 201 trace_ocfs2_iget_end(inode, 202 (unsigned long long)OCFS2_I(inode)->ip_blkno); 203 } 204 205 return inode; 206 } 207 208 209 /* 210 * here's how inodes get read from disk: 211 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR 212 * found? : return the in-memory inode 213 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE 214 */ 215 216 static int ocfs2_find_actor(struct inode *inode, void *opaque) 217 { 218 struct ocfs2_find_inode_args *args = NULL; 219 struct ocfs2_inode_info *oi = OCFS2_I(inode); 220 int ret = 0; 221 222 args = opaque; 223 224 mlog_bug_on_msg(!inode, "No inode in find actor!\n"); 225 226 trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno); 227 228 if (oi->ip_blkno != args->fi_blkno) 229 goto bail; 230 231 ret = 1; 232 bail: 233 return ret; 234 } 235 236 /* 237 * initialize the new inode, but don't do anything that would cause 238 * us to sleep. 239 * return 0 on success, 1 on failure 240 */ 241 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque) 242 { 243 struct ocfs2_find_inode_args *args = opaque; 244 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key, 245 ocfs2_file_ip_alloc_sem_key; 246 247 inode->i_ino = args->fi_ino; 248 OCFS2_I(inode)->ip_blkno = args->fi_blkno; 249 if (args->fi_sysfile_type != 0) 250 lockdep_set_class(&inode->i_mutex, 251 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]); 252 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE || 253 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE || 254 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE || 255 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE) 256 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem, 257 &ocfs2_quota_ip_alloc_sem_key); 258 else 259 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem, 260 &ocfs2_file_ip_alloc_sem_key); 261 262 return 0; 263 } 264 265 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 266 int create_ino) 267 { 268 struct super_block *sb; 269 struct ocfs2_super *osb; 270 int use_plocks = 1; 271 272 sb = inode->i_sb; 273 osb = OCFS2_SB(sb); 274 275 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) || 276 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks()) 277 use_plocks = 0; 278 279 /* 280 * These have all been checked by ocfs2_read_inode_block() or set 281 * by ocfs2_mknod_locked(), so a failure is a code bug. 282 */ 283 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode 284 cannot create a superblock 285 inode today. change if 286 that is needed. */ 287 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))); 288 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation); 289 290 291 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 292 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); 293 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features); 294 295 inode->i_version = 1; 296 inode->i_generation = le32_to_cpu(fe->i_generation); 297 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 298 inode->i_mode = le16_to_cpu(fe->i_mode); 299 i_uid_write(inode, le32_to_cpu(fe->i_uid)); 300 i_gid_write(inode, le32_to_cpu(fe->i_gid)); 301 302 /* Fast symlinks will have i_size but no allocated clusters. */ 303 if (S_ISLNK(inode->i_mode) && !fe->i_clusters) { 304 inode->i_blocks = 0; 305 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 306 } else { 307 inode->i_blocks = ocfs2_inode_sector_count(inode); 308 inode->i_mapping->a_ops = &ocfs2_aops; 309 } 310 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 311 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 312 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 313 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 314 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 315 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 316 317 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno)) 318 mlog(ML_ERROR, 319 "ip_blkno %llu != i_blkno %llu!\n", 320 (unsigned long long)OCFS2_I(inode)->ip_blkno, 321 (unsigned long long)le64_to_cpu(fe->i_blkno)); 322 323 set_nlink(inode, ocfs2_read_links_count(fe)); 324 325 trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno, 326 le32_to_cpu(fe->i_flags)); 327 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) { 328 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE; 329 inode->i_flags |= S_NOQUOTA; 330 } 331 332 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) { 333 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 334 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) { 335 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 336 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) { 337 inode->i_flags |= S_NOQUOTA; 338 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) { 339 /* we can't actually hit this as read_inode can't 340 * handle superblocks today ;-) */ 341 BUG(); 342 } 343 344 switch (inode->i_mode & S_IFMT) { 345 case S_IFREG: 346 if (use_plocks) 347 inode->i_fop = &ocfs2_fops; 348 else 349 inode->i_fop = &ocfs2_fops_no_plocks; 350 inode->i_op = &ocfs2_file_iops; 351 i_size_write(inode, le64_to_cpu(fe->i_size)); 352 break; 353 case S_IFDIR: 354 inode->i_op = &ocfs2_dir_iops; 355 if (use_plocks) 356 inode->i_fop = &ocfs2_dops; 357 else 358 inode->i_fop = &ocfs2_dops_no_plocks; 359 i_size_write(inode, le64_to_cpu(fe->i_size)); 360 OCFS2_I(inode)->ip_dir_lock_gen = 1; 361 break; 362 case S_IFLNK: 363 inode->i_op = &ocfs2_symlink_inode_operations; 364 i_size_write(inode, le64_to_cpu(fe->i_size)); 365 break; 366 default: 367 inode->i_op = &ocfs2_special_file_iops; 368 init_special_inode(inode, inode->i_mode, 369 inode->i_rdev); 370 break; 371 } 372 373 if (create_ino) { 374 inode->i_ino = ino_from_blkno(inode->i_sb, 375 le64_to_cpu(fe->i_blkno)); 376 377 /* 378 * If we ever want to create system files from kernel, 379 * the generation argument to 380 * ocfs2_inode_lock_res_init() will have to change. 381 */ 382 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL); 383 384 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres, 385 OCFS2_LOCK_TYPE_META, 0, inode); 386 387 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, 388 OCFS2_LOCK_TYPE_OPEN, 0, inode); 389 } 390 391 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres, 392 OCFS2_LOCK_TYPE_RW, inode->i_generation, 393 inode); 394 395 ocfs2_set_inode_flags(inode); 396 397 OCFS2_I(inode)->ip_last_used_slot = 0; 398 OCFS2_I(inode)->ip_last_used_group = 0; 399 400 if (S_ISDIR(inode->i_mode)) 401 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv, 402 OCFS2_RESV_FLAG_DIR); 403 } 404 405 static int ocfs2_read_locked_inode(struct inode *inode, 406 struct ocfs2_find_inode_args *args) 407 { 408 struct super_block *sb; 409 struct ocfs2_super *osb; 410 struct ocfs2_dinode *fe; 411 struct buffer_head *bh = NULL; 412 int status, can_lock; 413 u32 generation = 0; 414 415 status = -EINVAL; 416 sb = inode->i_sb; 417 osb = OCFS2_SB(sb); 418 419 /* 420 * To improve performance of cold-cache inode stats, we take 421 * the cluster lock here if possible. 422 * 423 * Generally, OCFS2 never trusts the contents of an inode 424 * unless it's holding a cluster lock, so taking it here isn't 425 * a correctness issue as much as it is a performance 426 * improvement. 427 * 428 * There are three times when taking the lock is not a good idea: 429 * 430 * 1) During startup, before we have initialized the DLM. 431 * 432 * 2) If we are reading certain system files which never get 433 * cluster locks (local alloc, truncate log). 434 * 435 * 3) If the process doing the iget() is responsible for 436 * orphan dir recovery. We're holding the orphan dir lock and 437 * can get into a deadlock with another process on another 438 * node in ->delete_inode(). 439 * 440 * #1 and #2 can be simply solved by never taking the lock 441 * here for system files (which are the only type we read 442 * during mount). It's a heavier approach, but our main 443 * concern is user-accessible files anyway. 444 * 445 * #3 works itself out because we'll eventually take the 446 * cluster lock before trusting anything anyway. 447 */ 448 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE) 449 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) 450 && !ocfs2_mount_local(osb); 451 452 trace_ocfs2_read_locked_inode( 453 (unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock); 454 455 /* 456 * To maintain backwards compatibility with older versions of 457 * ocfs2-tools, we still store the generation value for system 458 * files. The only ones that actually matter to userspace are 459 * the journals, but it's easier and inexpensive to just flag 460 * all system files similarly. 461 */ 462 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE) 463 generation = osb->fs_generation; 464 465 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres, 466 OCFS2_LOCK_TYPE_META, 467 generation, inode); 468 469 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, 470 OCFS2_LOCK_TYPE_OPEN, 471 0, inode); 472 473 if (can_lock) { 474 status = ocfs2_open_lock(inode); 475 if (status) { 476 make_bad_inode(inode); 477 mlog_errno(status); 478 return status; 479 } 480 status = ocfs2_inode_lock(inode, NULL, 0); 481 if (status) { 482 make_bad_inode(inode); 483 mlog_errno(status); 484 return status; 485 } 486 } 487 488 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) { 489 status = ocfs2_try_open_lock(inode, 0); 490 if (status) { 491 make_bad_inode(inode); 492 return status; 493 } 494 } 495 496 if (can_lock) { 497 status = ocfs2_read_inode_block_full(inode, &bh, 498 OCFS2_BH_IGNORE_CACHE); 499 } else { 500 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh); 501 /* 502 * If buffer is in jbd, then its checksum may not have been 503 * computed as yet. 504 */ 505 if (!status && !buffer_jbd(bh)) 506 status = ocfs2_validate_inode_block(osb->sb, bh); 507 } 508 if (status < 0) { 509 mlog_errno(status); 510 goto bail; 511 } 512 513 status = -EINVAL; 514 fe = (struct ocfs2_dinode *) bh->b_data; 515 516 /* 517 * This is a code bug. Right now the caller needs to 518 * understand whether it is asking for a system file inode or 519 * not so the proper lock names can be built. 520 */ 521 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) != 522 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE), 523 "Inode %llu: system file state is ambigous\n", 524 (unsigned long long)args->fi_blkno); 525 526 if (S_ISCHR(le16_to_cpu(fe->i_mode)) || 527 S_ISBLK(le16_to_cpu(fe->i_mode))) 528 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 529 530 ocfs2_populate_inode(inode, fe, 0); 531 532 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno)); 533 534 status = 0; 535 536 bail: 537 if (can_lock) 538 ocfs2_inode_unlock(inode, 0); 539 540 if (status < 0) 541 make_bad_inode(inode); 542 543 brelse(bh); 544 545 return status; 546 } 547 548 void ocfs2_sync_blockdev(struct super_block *sb) 549 { 550 sync_blockdev(sb->s_bdev); 551 } 552 553 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, 554 struct inode *inode, 555 struct buffer_head *fe_bh) 556 { 557 int status = 0; 558 struct ocfs2_dinode *fe; 559 handle_t *handle = NULL; 560 561 fe = (struct ocfs2_dinode *) fe_bh->b_data; 562 563 /* 564 * This check will also skip truncate of inodes with inline 565 * data and fast symlinks. 566 */ 567 if (fe->i_clusters) { 568 if (ocfs2_should_order_data(inode)) 569 ocfs2_begin_ordered_truncate(inode, 0); 570 571 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); 572 if (IS_ERR(handle)) { 573 status = PTR_ERR(handle); 574 handle = NULL; 575 mlog_errno(status); 576 goto out; 577 } 578 579 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 580 fe_bh, 581 OCFS2_JOURNAL_ACCESS_WRITE); 582 if (status < 0) { 583 mlog_errno(status); 584 goto out; 585 } 586 587 i_size_write(inode, 0); 588 589 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); 590 if (status < 0) { 591 mlog_errno(status); 592 goto out; 593 } 594 595 ocfs2_commit_trans(osb, handle); 596 handle = NULL; 597 598 status = ocfs2_commit_truncate(osb, inode, fe_bh); 599 if (status < 0) { 600 mlog_errno(status); 601 goto out; 602 } 603 } 604 605 out: 606 if (handle) 607 ocfs2_commit_trans(osb, handle); 608 return status; 609 } 610 611 static int ocfs2_remove_inode(struct inode *inode, 612 struct buffer_head *di_bh, 613 struct inode *orphan_dir_inode, 614 struct buffer_head *orphan_dir_bh) 615 { 616 int status; 617 struct inode *inode_alloc_inode = NULL; 618 struct buffer_head *inode_alloc_bh = NULL; 619 handle_t *handle; 620 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 621 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 622 623 inode_alloc_inode = 624 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, 625 le16_to_cpu(di->i_suballoc_slot)); 626 if (!inode_alloc_inode) { 627 status = -ENOENT; 628 mlog_errno(status); 629 goto bail; 630 } 631 632 mutex_lock(&inode_alloc_inode->i_mutex); 633 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1); 634 if (status < 0) { 635 mutex_unlock(&inode_alloc_inode->i_mutex); 636 637 mlog_errno(status); 638 goto bail; 639 } 640 641 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS + 642 ocfs2_quota_trans_credits(inode->i_sb)); 643 if (IS_ERR(handle)) { 644 status = PTR_ERR(handle); 645 mlog_errno(status); 646 goto bail_unlock; 647 } 648 649 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 650 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 651 orphan_dir_bh, false); 652 if (status < 0) { 653 mlog_errno(status); 654 goto bail_commit; 655 } 656 } 657 658 /* set the inodes dtime */ 659 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 660 OCFS2_JOURNAL_ACCESS_WRITE); 661 if (status < 0) { 662 mlog_errno(status); 663 goto bail_commit; 664 } 665 666 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec); 667 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL)); 668 ocfs2_journal_dirty(handle, di_bh); 669 670 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh); 671 dquot_free_inode(inode); 672 673 status = ocfs2_free_dinode(handle, inode_alloc_inode, 674 inode_alloc_bh, di); 675 if (status < 0) 676 mlog_errno(status); 677 678 bail_commit: 679 ocfs2_commit_trans(osb, handle); 680 bail_unlock: 681 ocfs2_inode_unlock(inode_alloc_inode, 1); 682 mutex_unlock(&inode_alloc_inode->i_mutex); 683 brelse(inode_alloc_bh); 684 bail: 685 iput(inode_alloc_inode); 686 687 return status; 688 } 689 690 /* 691 * Serialize with orphan dir recovery. If the process doing 692 * recovery on this orphan dir does an iget() with the dir 693 * i_mutex held, we'll deadlock here. Instead we detect this 694 * and exit early - recovery will wipe this inode for us. 695 */ 696 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb, 697 int slot) 698 { 699 int ret = 0; 700 701 spin_lock(&osb->osb_lock); 702 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) { 703 ret = -EDEADLK; 704 goto out; 705 } 706 /* This signals to the orphan recovery process that it should 707 * wait for us to handle the wipe. */ 708 osb->osb_orphan_wipes[slot]++; 709 out: 710 spin_unlock(&osb->osb_lock); 711 trace_ocfs2_check_orphan_recovery_state(slot, ret); 712 return ret; 713 } 714 715 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb, 716 int slot) 717 { 718 spin_lock(&osb->osb_lock); 719 osb->osb_orphan_wipes[slot]--; 720 spin_unlock(&osb->osb_lock); 721 722 wake_up(&osb->osb_wipe_event); 723 } 724 725 static int ocfs2_wipe_inode(struct inode *inode, 726 struct buffer_head *di_bh) 727 { 728 int status, orphaned_slot = -1; 729 struct inode *orphan_dir_inode = NULL; 730 struct buffer_head *orphan_dir_bh = NULL; 731 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 732 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 733 734 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 735 orphaned_slot = le16_to_cpu(di->i_orphaned_slot); 736 737 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot); 738 if (status) 739 return status; 740 741 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 742 ORPHAN_DIR_SYSTEM_INODE, 743 orphaned_slot); 744 if (!orphan_dir_inode) { 745 status = -ENOENT; 746 mlog_errno(status); 747 goto bail; 748 } 749 750 /* Lock the orphan dir. The lock will be held for the entire 751 * delete_inode operation. We do this now to avoid races with 752 * recovery completion on other nodes. */ 753 mutex_lock(&orphan_dir_inode->i_mutex); 754 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 755 if (status < 0) { 756 mutex_unlock(&orphan_dir_inode->i_mutex); 757 758 mlog_errno(status); 759 goto bail; 760 } 761 } 762 763 /* we do this while holding the orphan dir lock because we 764 * don't want recovery being run from another node to try an 765 * inode delete underneath us -- this will result in two nodes 766 * truncating the same file! */ 767 status = ocfs2_truncate_for_delete(osb, inode, di_bh); 768 if (status < 0) { 769 mlog_errno(status); 770 goto bail_unlock_dir; 771 } 772 773 /* Remove any dir index tree */ 774 if (S_ISDIR(inode->i_mode)) { 775 status = ocfs2_dx_dir_truncate(inode, di_bh); 776 if (status) { 777 mlog_errno(status); 778 goto bail_unlock_dir; 779 } 780 } 781 782 /*Free extended attribute resources associated with this inode.*/ 783 status = ocfs2_xattr_remove(inode, di_bh); 784 if (status < 0) { 785 mlog_errno(status); 786 goto bail_unlock_dir; 787 } 788 789 status = ocfs2_remove_refcount_tree(inode, di_bh); 790 if (status < 0) { 791 mlog_errno(status); 792 goto bail_unlock_dir; 793 } 794 795 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode, 796 orphan_dir_bh); 797 if (status < 0) 798 mlog_errno(status); 799 800 bail_unlock_dir: 801 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR) 802 return status; 803 804 ocfs2_inode_unlock(orphan_dir_inode, 1); 805 mutex_unlock(&orphan_dir_inode->i_mutex); 806 brelse(orphan_dir_bh); 807 bail: 808 iput(orphan_dir_inode); 809 ocfs2_signal_wipe_completion(osb, orphaned_slot); 810 811 return status; 812 } 813 814 /* There is a series of simple checks that should be done before a 815 * trylock is even considered. Encapsulate those in this function. */ 816 static int ocfs2_inode_is_valid_to_delete(struct inode *inode) 817 { 818 int ret = 0; 819 struct ocfs2_inode_info *oi = OCFS2_I(inode); 820 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 821 822 trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task, 823 (unsigned long long)oi->ip_blkno, 824 oi->ip_flags); 825 826 /* We shouldn't be getting here for the root directory 827 * inode.. */ 828 if (inode == osb->root_inode) { 829 mlog(ML_ERROR, "Skipping delete of root inode.\n"); 830 goto bail; 831 } 832 833 /* 834 * If we're coming from downconvert_thread we can't go into our own 835 * voting [hello, deadlock city!] so we cannot delete the inode. But 836 * since we dropped last inode ref when downconverting dentry lock, 837 * we cannot have the file open and thus the node doing unlink will 838 * take care of deleting the inode. 839 */ 840 if (current == osb->dc_task) 841 goto bail; 842 843 spin_lock(&oi->ip_lock); 844 /* OCFS2 *never* deletes system files. This should technically 845 * never get here as system file inodes should always have a 846 * positive link count. */ 847 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) { 848 mlog(ML_ERROR, "Skipping delete of system file %llu\n", 849 (unsigned long long)oi->ip_blkno); 850 goto bail_unlock; 851 } 852 853 ret = 1; 854 bail_unlock: 855 spin_unlock(&oi->ip_lock); 856 bail: 857 return ret; 858 } 859 860 /* Query the cluster to determine whether we should wipe an inode from 861 * disk or not. 862 * 863 * Requires the inode to have the cluster lock. */ 864 static int ocfs2_query_inode_wipe(struct inode *inode, 865 struct buffer_head *di_bh, 866 int *wipe) 867 { 868 int status = 0, reason = 0; 869 struct ocfs2_inode_info *oi = OCFS2_I(inode); 870 struct ocfs2_dinode *di; 871 872 *wipe = 0; 873 874 trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno, 875 inode->i_nlink); 876 877 /* While we were waiting for the cluster lock in 878 * ocfs2_delete_inode, another node might have asked to delete 879 * the inode. Recheck our flags to catch this. */ 880 if (!ocfs2_inode_is_valid_to_delete(inode)) { 881 reason = 1; 882 goto bail; 883 } 884 885 /* Now that we have an up to date inode, we can double check 886 * the link count. */ 887 if (inode->i_nlink) 888 goto bail; 889 890 /* Do some basic inode verification... */ 891 di = (struct ocfs2_dinode *) di_bh->b_data; 892 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) && 893 !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 894 /* 895 * Inodes in the orphan dir must have ORPHANED_FL. The only 896 * inodes that come back out of the orphan dir are reflink 897 * targets. A reflink target may be moved out of the orphan 898 * dir between the time we scan the directory and the time we 899 * process it. This would lead to HAS_REFCOUNT_FL being set but 900 * ORPHANED_FL not. 901 */ 902 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) { 903 reason = 2; 904 goto bail; 905 } 906 907 /* for lack of a better error? */ 908 status = -EEXIST; 909 mlog(ML_ERROR, 910 "Inode %llu (on-disk %llu) not orphaned! " 911 "Disk flags 0x%x, inode flags 0x%x\n", 912 (unsigned long long)oi->ip_blkno, 913 (unsigned long long)le64_to_cpu(di->i_blkno), 914 le32_to_cpu(di->i_flags), oi->ip_flags); 915 goto bail; 916 } 917 918 /* has someone already deleted us?! baaad... */ 919 if (di->i_dtime) { 920 status = -EEXIST; 921 mlog_errno(status); 922 goto bail; 923 } 924 925 /* 926 * This is how ocfs2 determines whether an inode is still live 927 * within the cluster. Every node takes a shared read lock on 928 * the inode open lock in ocfs2_read_locked_inode(). When we 929 * get to ->delete_inode(), each node tries to convert it's 930 * lock to an exclusive. Trylocks are serialized by the inode 931 * meta data lock. If the upconvert succeeds, we know the inode 932 * is no longer live and can be deleted. 933 * 934 * Though we call this with the meta data lock held, the 935 * trylock keeps us from ABBA deadlock. 936 */ 937 status = ocfs2_try_open_lock(inode, 1); 938 if (status == -EAGAIN) { 939 status = 0; 940 reason = 3; 941 goto bail; 942 } 943 if (status < 0) { 944 mlog_errno(status); 945 goto bail; 946 } 947 948 *wipe = 1; 949 trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot)); 950 951 bail: 952 trace_ocfs2_query_inode_wipe_end(status, reason); 953 return status; 954 } 955 956 /* Support function for ocfs2_delete_inode. Will help us keep the 957 * inode data in a consistent state for clear_inode. Always truncates 958 * pages, optionally sync's them first. */ 959 static void ocfs2_cleanup_delete_inode(struct inode *inode, 960 int sync_data) 961 { 962 trace_ocfs2_cleanup_delete_inode( 963 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data); 964 if (sync_data) 965 filemap_write_and_wait(inode->i_mapping); 966 truncate_inode_pages_final(&inode->i_data); 967 } 968 969 static void ocfs2_delete_inode(struct inode *inode) 970 { 971 int wipe, status; 972 sigset_t oldset; 973 struct buffer_head *di_bh = NULL; 974 struct ocfs2_dinode *di = NULL; 975 976 trace_ocfs2_delete_inode(inode->i_ino, 977 (unsigned long long)OCFS2_I(inode)->ip_blkno, 978 is_bad_inode(inode)); 979 980 /* When we fail in read_inode() we mark inode as bad. The second test 981 * catches the case when inode allocation fails before allocating 982 * a block for inode. */ 983 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno) 984 goto bail; 985 986 if (!ocfs2_inode_is_valid_to_delete(inode)) { 987 /* It's probably not necessary to truncate_inode_pages 988 * here but we do it for safety anyway (it will most 989 * likely be a no-op anyway) */ 990 ocfs2_cleanup_delete_inode(inode, 0); 991 goto bail; 992 } 993 994 dquot_initialize(inode); 995 996 /* We want to block signals in delete_inode as the lock and 997 * messaging paths may return us -ERESTARTSYS. Which would 998 * cause us to exit early, resulting in inodes being orphaned 999 * forever. */ 1000 ocfs2_block_signals(&oldset); 1001 1002 /* 1003 * Synchronize us against ocfs2_get_dentry. We take this in 1004 * shared mode so that all nodes can still concurrently 1005 * process deletes. 1006 */ 1007 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0); 1008 if (status < 0) { 1009 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status); 1010 ocfs2_cleanup_delete_inode(inode, 0); 1011 goto bail_unblock; 1012 } 1013 /* Lock down the inode. This gives us an up to date view of 1014 * it's metadata (for verification), and allows us to 1015 * serialize delete_inode on multiple nodes. 1016 * 1017 * Even though we might be doing a truncate, we don't take the 1018 * allocation lock here as it won't be needed - nobody will 1019 * have the file open. 1020 */ 1021 status = ocfs2_inode_lock(inode, &di_bh, 1); 1022 if (status < 0) { 1023 if (status != -ENOENT) 1024 mlog_errno(status); 1025 ocfs2_cleanup_delete_inode(inode, 0); 1026 goto bail_unlock_nfs_sync; 1027 } 1028 1029 di = (struct ocfs2_dinode *)di_bh->b_data; 1030 /* Skip inode deletion and wait for dio orphan entry recovered 1031 * first */ 1032 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 1033 ocfs2_cleanup_delete_inode(inode, 0); 1034 goto bail_unlock_inode; 1035 } 1036 1037 /* Query the cluster. This will be the final decision made 1038 * before we go ahead and wipe the inode. */ 1039 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe); 1040 if (!wipe || status < 0) { 1041 /* Error and remote inode busy both mean we won't be 1042 * removing the inode, so they take almost the same 1043 * path. */ 1044 if (status < 0) 1045 mlog_errno(status); 1046 1047 /* Someone in the cluster has disallowed a wipe of 1048 * this inode, or it was never completely 1049 * orphaned. Write out the pages and exit now. */ 1050 ocfs2_cleanup_delete_inode(inode, 1); 1051 goto bail_unlock_inode; 1052 } 1053 1054 ocfs2_cleanup_delete_inode(inode, 0); 1055 1056 status = ocfs2_wipe_inode(inode, di_bh); 1057 if (status < 0) { 1058 if (status != -EDEADLK) 1059 mlog_errno(status); 1060 goto bail_unlock_inode; 1061 } 1062 1063 /* 1064 * Mark the inode as successfully deleted. 1065 * 1066 * This is important for ocfs2_clear_inode() as it will check 1067 * this flag and skip any checkpointing work 1068 * 1069 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate 1070 * the LVB for other nodes. 1071 */ 1072 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED; 1073 1074 bail_unlock_inode: 1075 ocfs2_inode_unlock(inode, 1); 1076 brelse(di_bh); 1077 1078 bail_unlock_nfs_sync: 1079 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0); 1080 1081 bail_unblock: 1082 ocfs2_unblock_signals(&oldset); 1083 bail: 1084 return; 1085 } 1086 1087 static void ocfs2_clear_inode(struct inode *inode) 1088 { 1089 int status; 1090 struct ocfs2_inode_info *oi = OCFS2_I(inode); 1091 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 1092 1093 clear_inode(inode); 1094 trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno, 1095 inode->i_nlink); 1096 1097 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL, 1098 "Inode=%lu\n", inode->i_ino); 1099 1100 dquot_drop(inode); 1101 1102 /* To preven remote deletes we hold open lock before, now it 1103 * is time to unlock PR and EX open locks. */ 1104 ocfs2_open_unlock(inode); 1105 1106 /* Do these before all the other work so that we don't bounce 1107 * the downconvert thread while waiting to destroy the locks. */ 1108 ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres); 1109 ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres); 1110 ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres); 1111 1112 ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap, 1113 &oi->ip_la_data_resv); 1114 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1115 1116 /* We very well may get a clear_inode before all an inodes 1117 * metadata has hit disk. Of course, we can't drop any cluster 1118 * locks until the journal has finished with it. The only 1119 * exception here are successfully wiped inodes - their 1120 * metadata can now be considered to be part of the system 1121 * inodes from which it came. */ 1122 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED)) 1123 ocfs2_checkpoint_inode(inode); 1124 1125 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers), 1126 "Clear inode of %llu, inode has io markers\n", 1127 (unsigned long long)oi->ip_blkno); 1128 1129 ocfs2_extent_map_trunc(inode, 0); 1130 1131 status = ocfs2_drop_inode_locks(inode); 1132 if (status < 0) 1133 mlog_errno(status); 1134 1135 ocfs2_lock_res_free(&oi->ip_rw_lockres); 1136 ocfs2_lock_res_free(&oi->ip_inode_lockres); 1137 ocfs2_lock_res_free(&oi->ip_open_lockres); 1138 1139 ocfs2_metadata_cache_exit(INODE_CACHE(inode)); 1140 1141 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached, 1142 "Clear inode of %llu, inode has %u cache items\n", 1143 (unsigned long long)oi->ip_blkno, 1144 INODE_CACHE(inode)->ci_num_cached); 1145 1146 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE), 1147 "Clear inode of %llu, inode has a bad flag\n", 1148 (unsigned long long)oi->ip_blkno); 1149 1150 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock), 1151 "Clear inode of %llu, inode is locked\n", 1152 (unsigned long long)oi->ip_blkno); 1153 1154 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex), 1155 "Clear inode of %llu, io_mutex is locked\n", 1156 (unsigned long long)oi->ip_blkno); 1157 mutex_unlock(&oi->ip_io_mutex); 1158 1159 /* 1160 * down_trylock() returns 0, down_write_trylock() returns 1 1161 * kernel 1, world 0 1162 */ 1163 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem), 1164 "Clear inode of %llu, alloc_sem is locked\n", 1165 (unsigned long long)oi->ip_blkno); 1166 up_write(&oi->ip_alloc_sem); 1167 1168 mlog_bug_on_msg(oi->ip_open_count, 1169 "Clear inode of %llu has open count %d\n", 1170 (unsigned long long)oi->ip_blkno, oi->ip_open_count); 1171 1172 /* Clear all other flags. */ 1173 oi->ip_flags = 0; 1174 oi->ip_dir_start_lookup = 0; 1175 oi->ip_blkno = 0ULL; 1176 1177 /* 1178 * ip_jinode is used to track txns against this inode. We ensure that 1179 * the journal is flushed before journal shutdown. Thus it is safe to 1180 * have inodes get cleaned up after journal shutdown. 1181 */ 1182 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal, 1183 &oi->ip_jinode); 1184 } 1185 1186 void ocfs2_evict_inode(struct inode *inode) 1187 { 1188 if (!inode->i_nlink || 1189 (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) { 1190 ocfs2_delete_inode(inode); 1191 } else { 1192 truncate_inode_pages_final(&inode->i_data); 1193 } 1194 ocfs2_clear_inode(inode); 1195 } 1196 1197 /* Called under inode_lock, with no more references on the 1198 * struct inode, so it's safe here to check the flags field 1199 * and to manipulate i_nlink without any other locks. */ 1200 int ocfs2_drop_inode(struct inode *inode) 1201 { 1202 struct ocfs2_inode_info *oi = OCFS2_I(inode); 1203 1204 trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno, 1205 inode->i_nlink, oi->ip_flags); 1206 1207 assert_spin_locked(&inode->i_lock); 1208 inode->i_state |= I_WILL_FREE; 1209 spin_unlock(&inode->i_lock); 1210 write_inode_now(inode, 1); 1211 spin_lock(&inode->i_lock); 1212 WARN_ON(inode->i_state & I_NEW); 1213 inode->i_state &= ~I_WILL_FREE; 1214 1215 return 1; 1216 } 1217 1218 /* 1219 * This is called from our getattr. 1220 */ 1221 int ocfs2_inode_revalidate(struct dentry *dentry) 1222 { 1223 struct inode *inode = d_inode(dentry); 1224 int status = 0; 1225 1226 trace_ocfs2_inode_revalidate(inode, 1227 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL, 1228 inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0); 1229 1230 if (!inode) { 1231 status = -ENOENT; 1232 goto bail; 1233 } 1234 1235 spin_lock(&OCFS2_I(inode)->ip_lock); 1236 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { 1237 spin_unlock(&OCFS2_I(inode)->ip_lock); 1238 status = -ENOENT; 1239 goto bail; 1240 } 1241 spin_unlock(&OCFS2_I(inode)->ip_lock); 1242 1243 /* Let ocfs2_inode_lock do the work of updating our struct 1244 * inode for us. */ 1245 status = ocfs2_inode_lock(inode, NULL, 0); 1246 if (status < 0) { 1247 if (status != -ENOENT) 1248 mlog_errno(status); 1249 goto bail; 1250 } 1251 ocfs2_inode_unlock(inode, 0); 1252 bail: 1253 return status; 1254 } 1255 1256 /* 1257 * Updates a disk inode from a 1258 * struct inode. 1259 * Only takes ip_lock. 1260 */ 1261 int ocfs2_mark_inode_dirty(handle_t *handle, 1262 struct inode *inode, 1263 struct buffer_head *bh) 1264 { 1265 int status; 1266 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; 1267 1268 trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno); 1269 1270 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, 1271 OCFS2_JOURNAL_ACCESS_WRITE); 1272 if (status < 0) { 1273 mlog_errno(status); 1274 goto leave; 1275 } 1276 1277 spin_lock(&OCFS2_I(inode)->ip_lock); 1278 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters); 1279 ocfs2_get_inode_flags(OCFS2_I(inode)); 1280 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr); 1281 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); 1282 spin_unlock(&OCFS2_I(inode)->ip_lock); 1283 1284 fe->i_size = cpu_to_le64(i_size_read(inode)); 1285 ocfs2_set_links_count(fe, inode->i_nlink); 1286 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 1287 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 1288 fe->i_mode = cpu_to_le16(inode->i_mode); 1289 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 1290 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 1291 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 1292 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 1293 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 1294 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 1295 1296 ocfs2_journal_dirty(handle, bh); 1297 ocfs2_update_inode_fsync_trans(handle, inode, 1); 1298 leave: 1299 return status; 1300 } 1301 1302 /* 1303 * 1304 * Updates a struct inode from a disk inode. 1305 * does no i/o, only takes ip_lock. 1306 */ 1307 void ocfs2_refresh_inode(struct inode *inode, 1308 struct ocfs2_dinode *fe) 1309 { 1310 spin_lock(&OCFS2_I(inode)->ip_lock); 1311 1312 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 1313 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); 1314 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features); 1315 ocfs2_set_inode_flags(inode); 1316 i_size_write(inode, le64_to_cpu(fe->i_size)); 1317 set_nlink(inode, ocfs2_read_links_count(fe)); 1318 i_uid_write(inode, le32_to_cpu(fe->i_uid)); 1319 i_gid_write(inode, le32_to_cpu(fe->i_gid)); 1320 inode->i_mode = le16_to_cpu(fe->i_mode); 1321 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0) 1322 inode->i_blocks = 0; 1323 else 1324 inode->i_blocks = ocfs2_inode_sector_count(inode); 1325 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 1326 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 1327 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 1328 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 1329 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 1330 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 1331 1332 spin_unlock(&OCFS2_I(inode)->ip_lock); 1333 } 1334 1335 int ocfs2_validate_inode_block(struct super_block *sb, 1336 struct buffer_head *bh) 1337 { 1338 int rc; 1339 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1340 1341 trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr); 1342 1343 BUG_ON(!buffer_uptodate(bh)); 1344 1345 /* 1346 * If the ecc fails, we return the error but otherwise 1347 * leave the filesystem running. We know any error is 1348 * local to this block. 1349 */ 1350 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check); 1351 if (rc) { 1352 mlog(ML_ERROR, "Checksum failed for dinode %llu\n", 1353 (unsigned long long)bh->b_blocknr); 1354 goto bail; 1355 } 1356 1357 /* 1358 * Errors after here are fatal. 1359 */ 1360 1361 rc = -EINVAL; 1362 1363 if (!OCFS2_IS_VALID_DINODE(di)) { 1364 rc = ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n", 1365 (unsigned long long)bh->b_blocknr, 7, 1366 di->i_signature); 1367 goto bail; 1368 } 1369 1370 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) { 1371 rc = ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n", 1372 (unsigned long long)bh->b_blocknr, 1373 (unsigned long long)le64_to_cpu(di->i_blkno)); 1374 goto bail; 1375 } 1376 1377 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) { 1378 rc = ocfs2_error(sb, 1379 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n", 1380 (unsigned long long)bh->b_blocknr); 1381 goto bail; 1382 } 1383 1384 if (le32_to_cpu(di->i_fs_generation) != 1385 OCFS2_SB(sb)->fs_generation) { 1386 rc = ocfs2_error(sb, 1387 "Invalid dinode #%llu: fs_generation is %u\n", 1388 (unsigned long long)bh->b_blocknr, 1389 le32_to_cpu(di->i_fs_generation)); 1390 goto bail; 1391 } 1392 1393 rc = 0; 1394 1395 bail: 1396 return rc; 1397 } 1398 1399 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, 1400 int flags) 1401 { 1402 int rc; 1403 struct buffer_head *tmp = *bh; 1404 1405 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno, 1406 1, &tmp, flags, ocfs2_validate_inode_block); 1407 1408 /* If ocfs2_read_blocks() got us a new bh, pass it up. */ 1409 if (!rc && !*bh) 1410 *bh = tmp; 1411 1412 return rc; 1413 } 1414 1415 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh) 1416 { 1417 return ocfs2_read_inode_block_full(inode, bh, 0); 1418 } 1419 1420 1421 static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci) 1422 { 1423 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1424 1425 return oi->ip_blkno; 1426 } 1427 1428 static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci) 1429 { 1430 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1431 1432 return oi->vfs_inode.i_sb; 1433 } 1434 1435 static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci) 1436 { 1437 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1438 1439 spin_lock(&oi->ip_lock); 1440 } 1441 1442 static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci) 1443 { 1444 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1445 1446 spin_unlock(&oi->ip_lock); 1447 } 1448 1449 static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci) 1450 { 1451 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1452 1453 mutex_lock(&oi->ip_io_mutex); 1454 } 1455 1456 static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci) 1457 { 1458 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1459 1460 mutex_unlock(&oi->ip_io_mutex); 1461 } 1462 1463 const struct ocfs2_caching_operations ocfs2_inode_caching_ops = { 1464 .co_owner = ocfs2_inode_cache_owner, 1465 .co_get_super = ocfs2_inode_cache_get_super, 1466 .co_cache_lock = ocfs2_inode_cache_lock, 1467 .co_cache_unlock = ocfs2_inode_cache_unlock, 1468 .co_io_lock = ocfs2_inode_cache_io_lock, 1469 .co_io_unlock = ocfs2_inode_cache_io_unlock, 1470 }; 1471 1472