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; 133 134 trace_ocfs2_iget_begin((unsigned long long)blkno, flags, 135 sysfile_type); 136 137 /* Ok. By now we've either got the offsets passed to us by the 138 * caller, or we just pulled them off the bh. Lets do some 139 * sanity checks to make sure they're OK. */ 140 if (blkno == 0) { 141 inode = ERR_PTR(-EINVAL); 142 mlog_errno(PTR_ERR(inode)); 143 goto bail; 144 } 145 146 args.fi_blkno = blkno; 147 args.fi_flags = flags; 148 args.fi_ino = ino_from_blkno(sb, blkno); 149 args.fi_sysfile_type = sysfile_type; 150 151 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor, 152 ocfs2_init_locked_inode, &args); 153 /* inode was *not* in the inode cache. 2.6.x requires 154 * us to do our own read_inode call and unlock it 155 * afterwards. */ 156 if (inode == NULL) { 157 inode = ERR_PTR(-ENOMEM); 158 mlog_errno(PTR_ERR(inode)); 159 goto bail; 160 } 161 trace_ocfs2_iget5_locked(inode->i_state); 162 if (inode->i_state & I_NEW) { 163 ocfs2_read_locked_inode(inode, &args); 164 unlock_new_inode(inode); 165 } 166 if (is_bad_inode(inode)) { 167 iput(inode); 168 inode = ERR_PTR(-ESTALE); 169 goto bail; 170 } 171 172 bail: 173 if (!IS_ERR(inode)) { 174 trace_ocfs2_iget_end(inode, 175 (unsigned long long)OCFS2_I(inode)->ip_blkno); 176 } 177 178 return inode; 179 } 180 181 182 /* 183 * here's how inodes get read from disk: 184 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR 185 * found? : return the in-memory inode 186 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE 187 */ 188 189 static int ocfs2_find_actor(struct inode *inode, void *opaque) 190 { 191 struct ocfs2_find_inode_args *args = NULL; 192 struct ocfs2_inode_info *oi = OCFS2_I(inode); 193 int ret = 0; 194 195 args = opaque; 196 197 mlog_bug_on_msg(!inode, "No inode in find actor!\n"); 198 199 trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno); 200 201 if (oi->ip_blkno != args->fi_blkno) 202 goto bail; 203 204 ret = 1; 205 bail: 206 return ret; 207 } 208 209 /* 210 * initialize the new inode, but don't do anything that would cause 211 * us to sleep. 212 * return 0 on success, 1 on failure 213 */ 214 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque) 215 { 216 struct ocfs2_find_inode_args *args = opaque; 217 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key, 218 ocfs2_file_ip_alloc_sem_key; 219 220 inode->i_ino = args->fi_ino; 221 OCFS2_I(inode)->ip_blkno = args->fi_blkno; 222 if (args->fi_sysfile_type != 0) 223 lockdep_set_class(&inode->i_mutex, 224 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]); 225 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE || 226 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE || 227 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE || 228 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE) 229 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem, 230 &ocfs2_quota_ip_alloc_sem_key); 231 else 232 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem, 233 &ocfs2_file_ip_alloc_sem_key); 234 235 return 0; 236 } 237 238 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 239 int create_ino) 240 { 241 struct super_block *sb; 242 struct ocfs2_super *osb; 243 int use_plocks = 1; 244 245 sb = inode->i_sb; 246 osb = OCFS2_SB(sb); 247 248 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) || 249 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks()) 250 use_plocks = 0; 251 252 /* 253 * These have all been checked by ocfs2_read_inode_block() or set 254 * by ocfs2_mknod_locked(), so a failure is a code bug. 255 */ 256 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode 257 cannot create a superblock 258 inode today. change if 259 that is needed. */ 260 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))); 261 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation); 262 263 264 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 265 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); 266 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features); 267 268 inode->i_version = 1; 269 inode->i_generation = le32_to_cpu(fe->i_generation); 270 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 271 inode->i_mode = le16_to_cpu(fe->i_mode); 272 inode->i_uid = le32_to_cpu(fe->i_uid); 273 inode->i_gid = le32_to_cpu(fe->i_gid); 274 275 /* Fast symlinks will have i_size but no allocated clusters. */ 276 if (S_ISLNK(inode->i_mode) && !fe->i_clusters) { 277 inode->i_blocks = 0; 278 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 279 } else { 280 inode->i_blocks = ocfs2_inode_sector_count(inode); 281 inode->i_mapping->a_ops = &ocfs2_aops; 282 } 283 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 284 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 285 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 286 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 287 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 288 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 289 290 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno)) 291 mlog(ML_ERROR, 292 "ip_blkno %llu != i_blkno %llu!\n", 293 (unsigned long long)OCFS2_I(inode)->ip_blkno, 294 (unsigned long long)le64_to_cpu(fe->i_blkno)); 295 296 set_nlink(inode, ocfs2_read_links_count(fe)); 297 298 trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno, 299 le32_to_cpu(fe->i_flags)); 300 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) { 301 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE; 302 inode->i_flags |= S_NOQUOTA; 303 } 304 305 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) { 306 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 307 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) { 308 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 309 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) { 310 inode->i_flags |= S_NOQUOTA; 311 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) { 312 /* we can't actually hit this as read_inode can't 313 * handle superblocks today ;-) */ 314 BUG(); 315 } 316 317 switch (inode->i_mode & S_IFMT) { 318 case S_IFREG: 319 if (use_plocks) 320 inode->i_fop = &ocfs2_fops; 321 else 322 inode->i_fop = &ocfs2_fops_no_plocks; 323 inode->i_op = &ocfs2_file_iops; 324 i_size_write(inode, le64_to_cpu(fe->i_size)); 325 break; 326 case S_IFDIR: 327 inode->i_op = &ocfs2_dir_iops; 328 if (use_plocks) 329 inode->i_fop = &ocfs2_dops; 330 else 331 inode->i_fop = &ocfs2_dops_no_plocks; 332 i_size_write(inode, le64_to_cpu(fe->i_size)); 333 OCFS2_I(inode)->ip_dir_lock_gen = 1; 334 break; 335 case S_IFLNK: 336 inode->i_op = &ocfs2_symlink_inode_operations; 337 i_size_write(inode, le64_to_cpu(fe->i_size)); 338 break; 339 default: 340 inode->i_op = &ocfs2_special_file_iops; 341 init_special_inode(inode, inode->i_mode, 342 inode->i_rdev); 343 break; 344 } 345 346 if (create_ino) { 347 inode->i_ino = ino_from_blkno(inode->i_sb, 348 le64_to_cpu(fe->i_blkno)); 349 350 /* 351 * If we ever want to create system files from kernel, 352 * the generation argument to 353 * ocfs2_inode_lock_res_init() will have to change. 354 */ 355 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL); 356 357 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres, 358 OCFS2_LOCK_TYPE_META, 0, inode); 359 360 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, 361 OCFS2_LOCK_TYPE_OPEN, 0, inode); 362 } 363 364 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres, 365 OCFS2_LOCK_TYPE_RW, inode->i_generation, 366 inode); 367 368 ocfs2_set_inode_flags(inode); 369 370 OCFS2_I(inode)->ip_last_used_slot = 0; 371 OCFS2_I(inode)->ip_last_used_group = 0; 372 373 if (S_ISDIR(inode->i_mode)) 374 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv, 375 OCFS2_RESV_FLAG_DIR); 376 } 377 378 static int ocfs2_read_locked_inode(struct inode *inode, 379 struct ocfs2_find_inode_args *args) 380 { 381 struct super_block *sb; 382 struct ocfs2_super *osb; 383 struct ocfs2_dinode *fe; 384 struct buffer_head *bh = NULL; 385 int status, can_lock; 386 u32 generation = 0; 387 388 status = -EINVAL; 389 if (inode == NULL || inode->i_sb == NULL) { 390 mlog(ML_ERROR, "bad inode\n"); 391 return status; 392 } 393 sb = inode->i_sb; 394 osb = OCFS2_SB(sb); 395 396 if (!args) { 397 mlog(ML_ERROR, "bad inode args\n"); 398 make_bad_inode(inode); 399 return status; 400 } 401 402 /* 403 * To improve performance of cold-cache inode stats, we take 404 * the cluster lock here if possible. 405 * 406 * Generally, OCFS2 never trusts the contents of an inode 407 * unless it's holding a cluster lock, so taking it here isn't 408 * a correctness issue as much as it is a performance 409 * improvement. 410 * 411 * There are three times when taking the lock is not a good idea: 412 * 413 * 1) During startup, before we have initialized the DLM. 414 * 415 * 2) If we are reading certain system files which never get 416 * cluster locks (local alloc, truncate log). 417 * 418 * 3) If the process doing the iget() is responsible for 419 * orphan dir recovery. We're holding the orphan dir lock and 420 * can get into a deadlock with another process on another 421 * node in ->delete_inode(). 422 * 423 * #1 and #2 can be simply solved by never taking the lock 424 * here for system files (which are the only type we read 425 * during mount). It's a heavier approach, but our main 426 * concern is user-accessible files anyway. 427 * 428 * #3 works itself out because we'll eventually take the 429 * cluster lock before trusting anything anyway. 430 */ 431 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE) 432 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) 433 && !ocfs2_mount_local(osb); 434 435 trace_ocfs2_read_locked_inode( 436 (unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock); 437 438 /* 439 * To maintain backwards compatibility with older versions of 440 * ocfs2-tools, we still store the generation value for system 441 * files. The only ones that actually matter to userspace are 442 * the journals, but it's easier and inexpensive to just flag 443 * all system files similarly. 444 */ 445 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE) 446 generation = osb->fs_generation; 447 448 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres, 449 OCFS2_LOCK_TYPE_META, 450 generation, inode); 451 452 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, 453 OCFS2_LOCK_TYPE_OPEN, 454 0, inode); 455 456 if (can_lock) { 457 status = ocfs2_open_lock(inode); 458 if (status) { 459 make_bad_inode(inode); 460 mlog_errno(status); 461 return status; 462 } 463 status = ocfs2_inode_lock(inode, NULL, 0); 464 if (status) { 465 make_bad_inode(inode); 466 mlog_errno(status); 467 return status; 468 } 469 } 470 471 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) { 472 status = ocfs2_try_open_lock(inode, 0); 473 if (status) { 474 make_bad_inode(inode); 475 return status; 476 } 477 } 478 479 if (can_lock) { 480 status = ocfs2_read_inode_block_full(inode, &bh, 481 OCFS2_BH_IGNORE_CACHE); 482 } else { 483 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh); 484 /* 485 * If buffer is in jbd, then its checksum may not have been 486 * computed as yet. 487 */ 488 if (!status && !buffer_jbd(bh)) 489 status = ocfs2_validate_inode_block(osb->sb, bh); 490 } 491 if (status < 0) { 492 mlog_errno(status); 493 goto bail; 494 } 495 496 status = -EINVAL; 497 fe = (struct ocfs2_dinode *) bh->b_data; 498 499 /* 500 * This is a code bug. Right now the caller needs to 501 * understand whether it is asking for a system file inode or 502 * not so the proper lock names can be built. 503 */ 504 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) != 505 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE), 506 "Inode %llu: system file state is ambigous\n", 507 (unsigned long long)args->fi_blkno); 508 509 if (S_ISCHR(le16_to_cpu(fe->i_mode)) || 510 S_ISBLK(le16_to_cpu(fe->i_mode))) 511 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 512 513 ocfs2_populate_inode(inode, fe, 0); 514 515 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno)); 516 517 status = 0; 518 519 bail: 520 if (can_lock) 521 ocfs2_inode_unlock(inode, 0); 522 523 if (status < 0) 524 make_bad_inode(inode); 525 526 if (args && bh) 527 brelse(bh); 528 529 return status; 530 } 531 532 void ocfs2_sync_blockdev(struct super_block *sb) 533 { 534 sync_blockdev(sb->s_bdev); 535 } 536 537 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, 538 struct inode *inode, 539 struct buffer_head *fe_bh) 540 { 541 int status = 0; 542 struct ocfs2_dinode *fe; 543 handle_t *handle = NULL; 544 545 fe = (struct ocfs2_dinode *) fe_bh->b_data; 546 547 /* 548 * This check will also skip truncate of inodes with inline 549 * data and fast symlinks. 550 */ 551 if (fe->i_clusters) { 552 if (ocfs2_should_order_data(inode)) 553 ocfs2_begin_ordered_truncate(inode, 0); 554 555 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); 556 if (IS_ERR(handle)) { 557 status = PTR_ERR(handle); 558 handle = NULL; 559 mlog_errno(status); 560 goto out; 561 } 562 563 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 564 fe_bh, 565 OCFS2_JOURNAL_ACCESS_WRITE); 566 if (status < 0) { 567 mlog_errno(status); 568 goto out; 569 } 570 571 i_size_write(inode, 0); 572 573 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); 574 if (status < 0) { 575 mlog_errno(status); 576 goto out; 577 } 578 579 ocfs2_commit_trans(osb, handle); 580 handle = NULL; 581 582 status = ocfs2_commit_truncate(osb, inode, fe_bh); 583 if (status < 0) { 584 mlog_errno(status); 585 goto out; 586 } 587 } 588 589 out: 590 if (handle) 591 ocfs2_commit_trans(osb, handle); 592 return status; 593 } 594 595 static int ocfs2_remove_inode(struct inode *inode, 596 struct buffer_head *di_bh, 597 struct inode *orphan_dir_inode, 598 struct buffer_head *orphan_dir_bh) 599 { 600 int status; 601 struct inode *inode_alloc_inode = NULL; 602 struct buffer_head *inode_alloc_bh = NULL; 603 handle_t *handle; 604 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 605 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 606 607 inode_alloc_inode = 608 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, 609 le16_to_cpu(di->i_suballoc_slot)); 610 if (!inode_alloc_inode) { 611 status = -EEXIST; 612 mlog_errno(status); 613 goto bail; 614 } 615 616 mutex_lock(&inode_alloc_inode->i_mutex); 617 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1); 618 if (status < 0) { 619 mutex_unlock(&inode_alloc_inode->i_mutex); 620 621 mlog_errno(status); 622 goto bail; 623 } 624 625 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS + 626 ocfs2_quota_trans_credits(inode->i_sb)); 627 if (IS_ERR(handle)) { 628 status = PTR_ERR(handle); 629 mlog_errno(status); 630 goto bail_unlock; 631 } 632 633 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 634 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 635 orphan_dir_bh); 636 if (status < 0) { 637 mlog_errno(status); 638 goto bail_commit; 639 } 640 } 641 642 /* set the inodes dtime */ 643 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 644 OCFS2_JOURNAL_ACCESS_WRITE); 645 if (status < 0) { 646 mlog_errno(status); 647 goto bail_commit; 648 } 649 650 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec); 651 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL)); 652 ocfs2_journal_dirty(handle, di_bh); 653 654 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh); 655 dquot_free_inode(inode); 656 657 status = ocfs2_free_dinode(handle, inode_alloc_inode, 658 inode_alloc_bh, di); 659 if (status < 0) 660 mlog_errno(status); 661 662 bail_commit: 663 ocfs2_commit_trans(osb, handle); 664 bail_unlock: 665 ocfs2_inode_unlock(inode_alloc_inode, 1); 666 mutex_unlock(&inode_alloc_inode->i_mutex); 667 brelse(inode_alloc_bh); 668 bail: 669 iput(inode_alloc_inode); 670 671 return status; 672 } 673 674 /* 675 * Serialize with orphan dir recovery. If the process doing 676 * recovery on this orphan dir does an iget() with the dir 677 * i_mutex held, we'll deadlock here. Instead we detect this 678 * and exit early - recovery will wipe this inode for us. 679 */ 680 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb, 681 int slot) 682 { 683 int ret = 0; 684 685 spin_lock(&osb->osb_lock); 686 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) { 687 ret = -EDEADLK; 688 goto out; 689 } 690 /* This signals to the orphan recovery process that it should 691 * wait for us to handle the wipe. */ 692 osb->osb_orphan_wipes[slot]++; 693 out: 694 spin_unlock(&osb->osb_lock); 695 trace_ocfs2_check_orphan_recovery_state(slot, ret); 696 return ret; 697 } 698 699 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb, 700 int slot) 701 { 702 spin_lock(&osb->osb_lock); 703 osb->osb_orphan_wipes[slot]--; 704 spin_unlock(&osb->osb_lock); 705 706 wake_up(&osb->osb_wipe_event); 707 } 708 709 static int ocfs2_wipe_inode(struct inode *inode, 710 struct buffer_head *di_bh) 711 { 712 int status, orphaned_slot = -1; 713 struct inode *orphan_dir_inode = NULL; 714 struct buffer_head *orphan_dir_bh = NULL; 715 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 716 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 717 718 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 719 orphaned_slot = le16_to_cpu(di->i_orphaned_slot); 720 721 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot); 722 if (status) 723 return status; 724 725 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 726 ORPHAN_DIR_SYSTEM_INODE, 727 orphaned_slot); 728 if (!orphan_dir_inode) { 729 status = -EEXIST; 730 mlog_errno(status); 731 goto bail; 732 } 733 734 /* Lock the orphan dir. The lock will be held for the entire 735 * delete_inode operation. We do this now to avoid races with 736 * recovery completion on other nodes. */ 737 mutex_lock(&orphan_dir_inode->i_mutex); 738 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 739 if (status < 0) { 740 mutex_unlock(&orphan_dir_inode->i_mutex); 741 742 mlog_errno(status); 743 goto bail; 744 } 745 } 746 747 /* we do this while holding the orphan dir lock because we 748 * don't want recovery being run from another node to try an 749 * inode delete underneath us -- this will result in two nodes 750 * truncating the same file! */ 751 status = ocfs2_truncate_for_delete(osb, inode, di_bh); 752 if (status < 0) { 753 mlog_errno(status); 754 goto bail_unlock_dir; 755 } 756 757 /* Remove any dir index tree */ 758 if (S_ISDIR(inode->i_mode)) { 759 status = ocfs2_dx_dir_truncate(inode, di_bh); 760 if (status) { 761 mlog_errno(status); 762 goto bail_unlock_dir; 763 } 764 } 765 766 /*Free extended attribute resources associated with this inode.*/ 767 status = ocfs2_xattr_remove(inode, di_bh); 768 if (status < 0) { 769 mlog_errno(status); 770 goto bail_unlock_dir; 771 } 772 773 status = ocfs2_remove_refcount_tree(inode, di_bh); 774 if (status < 0) { 775 mlog_errno(status); 776 goto bail_unlock_dir; 777 } 778 779 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode, 780 orphan_dir_bh); 781 if (status < 0) 782 mlog_errno(status); 783 784 bail_unlock_dir: 785 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR) 786 return status; 787 788 ocfs2_inode_unlock(orphan_dir_inode, 1); 789 mutex_unlock(&orphan_dir_inode->i_mutex); 790 brelse(orphan_dir_bh); 791 bail: 792 iput(orphan_dir_inode); 793 ocfs2_signal_wipe_completion(osb, orphaned_slot); 794 795 return status; 796 } 797 798 /* There is a series of simple checks that should be done before a 799 * trylock is even considered. Encapsulate those in this function. */ 800 static int ocfs2_inode_is_valid_to_delete(struct inode *inode) 801 { 802 int ret = 0; 803 struct ocfs2_inode_info *oi = OCFS2_I(inode); 804 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 805 806 trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task, 807 (unsigned long long)oi->ip_blkno, 808 oi->ip_flags); 809 810 /* We shouldn't be getting here for the root directory 811 * inode.. */ 812 if (inode == osb->root_inode) { 813 mlog(ML_ERROR, "Skipping delete of root inode.\n"); 814 goto bail; 815 } 816 817 /* If we're coming from downconvert_thread we can't go into our own 818 * voting [hello, deadlock city!], so unforuntately we just 819 * have to skip deleting this guy. That's OK though because 820 * the node who's doing the actual deleting should handle it 821 * anyway. */ 822 if (current == osb->dc_task) 823 goto bail; 824 825 spin_lock(&oi->ip_lock); 826 /* OCFS2 *never* deletes system files. This should technically 827 * never get here as system file inodes should always have a 828 * positive link count. */ 829 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) { 830 mlog(ML_ERROR, "Skipping delete of system file %llu\n", 831 (unsigned long long)oi->ip_blkno); 832 goto bail_unlock; 833 } 834 835 /* If we have allowd wipe of this inode for another node, it 836 * will be marked here so we can safely skip it. Recovery will 837 * cleanup any inodes we might inadvertently skip here. */ 838 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) 839 goto bail_unlock; 840 841 ret = 1; 842 bail_unlock: 843 spin_unlock(&oi->ip_lock); 844 bail: 845 return ret; 846 } 847 848 /* Query the cluster to determine whether we should wipe an inode from 849 * disk or not. 850 * 851 * Requires the inode to have the cluster lock. */ 852 static int ocfs2_query_inode_wipe(struct inode *inode, 853 struct buffer_head *di_bh, 854 int *wipe) 855 { 856 int status = 0, reason = 0; 857 struct ocfs2_inode_info *oi = OCFS2_I(inode); 858 struct ocfs2_dinode *di; 859 860 *wipe = 0; 861 862 trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno, 863 inode->i_nlink); 864 865 /* While we were waiting for the cluster lock in 866 * ocfs2_delete_inode, another node might have asked to delete 867 * the inode. Recheck our flags to catch this. */ 868 if (!ocfs2_inode_is_valid_to_delete(inode)) { 869 reason = 1; 870 goto bail; 871 } 872 873 /* Now that we have an up to date inode, we can double check 874 * the link count. */ 875 if (inode->i_nlink) 876 goto bail; 877 878 /* Do some basic inode verification... */ 879 di = (struct ocfs2_dinode *) di_bh->b_data; 880 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) && 881 !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 882 /* 883 * Inodes in the orphan dir must have ORPHANED_FL. The only 884 * inodes that come back out of the orphan dir are reflink 885 * targets. A reflink target may be moved out of the orphan 886 * dir between the time we scan the directory and the time we 887 * process it. This would lead to HAS_REFCOUNT_FL being set but 888 * ORPHANED_FL not. 889 */ 890 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) { 891 reason = 2; 892 goto bail; 893 } 894 895 /* for lack of a better error? */ 896 status = -EEXIST; 897 mlog(ML_ERROR, 898 "Inode %llu (on-disk %llu) not orphaned! " 899 "Disk flags 0x%x, inode flags 0x%x\n", 900 (unsigned long long)oi->ip_blkno, 901 (unsigned long long)le64_to_cpu(di->i_blkno), 902 le32_to_cpu(di->i_flags), oi->ip_flags); 903 goto bail; 904 } 905 906 /* has someone already deleted us?! baaad... */ 907 if (di->i_dtime) { 908 status = -EEXIST; 909 mlog_errno(status); 910 goto bail; 911 } 912 913 /* 914 * This is how ocfs2 determines whether an inode is still live 915 * within the cluster. Every node takes a shared read lock on 916 * the inode open lock in ocfs2_read_locked_inode(). When we 917 * get to ->delete_inode(), each node tries to convert it's 918 * lock to an exclusive. Trylocks are serialized by the inode 919 * meta data lock. If the upconvert succeeds, we know the inode 920 * is no longer live and can be deleted. 921 * 922 * Though we call this with the meta data lock held, the 923 * trylock keeps us from ABBA deadlock. 924 */ 925 status = ocfs2_try_open_lock(inode, 1); 926 if (status == -EAGAIN) { 927 status = 0; 928 reason = 3; 929 goto bail; 930 } 931 if (status < 0) { 932 mlog_errno(status); 933 goto bail; 934 } 935 936 *wipe = 1; 937 trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot)); 938 939 bail: 940 trace_ocfs2_query_inode_wipe_end(status, reason); 941 return status; 942 } 943 944 /* Support function for ocfs2_delete_inode. Will help us keep the 945 * inode data in a consistent state for clear_inode. Always truncates 946 * pages, optionally sync's them first. */ 947 static void ocfs2_cleanup_delete_inode(struct inode *inode, 948 int sync_data) 949 { 950 trace_ocfs2_cleanup_delete_inode( 951 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data); 952 if (sync_data) 953 filemap_write_and_wait(inode->i_mapping); 954 truncate_inode_pages(&inode->i_data, 0); 955 } 956 957 static void ocfs2_delete_inode(struct inode *inode) 958 { 959 int wipe, status; 960 sigset_t oldset; 961 struct buffer_head *di_bh = NULL; 962 963 trace_ocfs2_delete_inode(inode->i_ino, 964 (unsigned long long)OCFS2_I(inode)->ip_blkno, 965 is_bad_inode(inode)); 966 967 /* When we fail in read_inode() we mark inode as bad. The second test 968 * catches the case when inode allocation fails before allocating 969 * a block for inode. */ 970 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno) 971 goto bail; 972 973 dquot_initialize(inode); 974 975 if (!ocfs2_inode_is_valid_to_delete(inode)) { 976 /* It's probably not necessary to truncate_inode_pages 977 * here but we do it for safety anyway (it will most 978 * likely be a no-op anyway) */ 979 ocfs2_cleanup_delete_inode(inode, 0); 980 goto bail; 981 } 982 983 /* We want to block signals in delete_inode as the lock and 984 * messaging paths may return us -ERESTARTSYS. Which would 985 * cause us to exit early, resulting in inodes being orphaned 986 * forever. */ 987 ocfs2_block_signals(&oldset); 988 989 /* 990 * Synchronize us against ocfs2_get_dentry. We take this in 991 * shared mode so that all nodes can still concurrently 992 * process deletes. 993 */ 994 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0); 995 if (status < 0) { 996 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status); 997 ocfs2_cleanup_delete_inode(inode, 0); 998 goto bail_unblock; 999 } 1000 /* Lock down the inode. This gives us an up to date view of 1001 * it's metadata (for verification), and allows us to 1002 * serialize delete_inode on multiple nodes. 1003 * 1004 * Even though we might be doing a truncate, we don't take the 1005 * allocation lock here as it won't be needed - nobody will 1006 * have the file open. 1007 */ 1008 status = ocfs2_inode_lock(inode, &di_bh, 1); 1009 if (status < 0) { 1010 if (status != -ENOENT) 1011 mlog_errno(status); 1012 ocfs2_cleanup_delete_inode(inode, 0); 1013 goto bail_unlock_nfs_sync; 1014 } 1015 1016 /* Query the cluster. This will be the final decision made 1017 * before we go ahead and wipe the inode. */ 1018 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe); 1019 if (!wipe || status < 0) { 1020 /* Error and remote inode busy both mean we won't be 1021 * removing the inode, so they take almost the same 1022 * path. */ 1023 if (status < 0) 1024 mlog_errno(status); 1025 1026 /* Someone in the cluster has disallowed a wipe of 1027 * this inode, or it was never completely 1028 * orphaned. Write out the pages and exit now. */ 1029 ocfs2_cleanup_delete_inode(inode, 1); 1030 goto bail_unlock_inode; 1031 } 1032 1033 ocfs2_cleanup_delete_inode(inode, 0); 1034 1035 status = ocfs2_wipe_inode(inode, di_bh); 1036 if (status < 0) { 1037 if (status != -EDEADLK) 1038 mlog_errno(status); 1039 goto bail_unlock_inode; 1040 } 1041 1042 /* 1043 * Mark the inode as successfully deleted. 1044 * 1045 * This is important for ocfs2_clear_inode() as it will check 1046 * this flag and skip any checkpointing work 1047 * 1048 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate 1049 * the LVB for other nodes. 1050 */ 1051 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED; 1052 1053 bail_unlock_inode: 1054 ocfs2_inode_unlock(inode, 1); 1055 brelse(di_bh); 1056 1057 bail_unlock_nfs_sync: 1058 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0); 1059 1060 bail_unblock: 1061 ocfs2_unblock_signals(&oldset); 1062 bail: 1063 return; 1064 } 1065 1066 static void ocfs2_clear_inode(struct inode *inode) 1067 { 1068 int status; 1069 struct ocfs2_inode_info *oi = OCFS2_I(inode); 1070 1071 clear_inode(inode); 1072 trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno, 1073 inode->i_nlink); 1074 1075 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL, 1076 "Inode=%lu\n", inode->i_ino); 1077 1078 dquot_drop(inode); 1079 1080 /* To preven remote deletes we hold open lock before, now it 1081 * is time to unlock PR and EX open locks. */ 1082 ocfs2_open_unlock(inode); 1083 1084 /* Do these before all the other work so that we don't bounce 1085 * the downconvert thread while waiting to destroy the locks. */ 1086 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres); 1087 ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres); 1088 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres); 1089 1090 ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap, 1091 &oi->ip_la_data_resv); 1092 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1093 1094 /* We very well may get a clear_inode before all an inodes 1095 * metadata has hit disk. Of course, we can't drop any cluster 1096 * locks until the journal has finished with it. The only 1097 * exception here are successfully wiped inodes - their 1098 * metadata can now be considered to be part of the system 1099 * inodes from which it came. */ 1100 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED)) 1101 ocfs2_checkpoint_inode(inode); 1102 1103 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers), 1104 "Clear inode of %llu, inode has io markers\n", 1105 (unsigned long long)oi->ip_blkno); 1106 1107 ocfs2_extent_map_trunc(inode, 0); 1108 1109 status = ocfs2_drop_inode_locks(inode); 1110 if (status < 0) 1111 mlog_errno(status); 1112 1113 ocfs2_lock_res_free(&oi->ip_rw_lockres); 1114 ocfs2_lock_res_free(&oi->ip_inode_lockres); 1115 ocfs2_lock_res_free(&oi->ip_open_lockres); 1116 1117 ocfs2_metadata_cache_exit(INODE_CACHE(inode)); 1118 1119 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached, 1120 "Clear inode of %llu, inode has %u cache items\n", 1121 (unsigned long long)oi->ip_blkno, 1122 INODE_CACHE(inode)->ci_num_cached); 1123 1124 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE), 1125 "Clear inode of %llu, inode has a bad flag\n", 1126 (unsigned long long)oi->ip_blkno); 1127 1128 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock), 1129 "Clear inode of %llu, inode is locked\n", 1130 (unsigned long long)oi->ip_blkno); 1131 1132 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex), 1133 "Clear inode of %llu, io_mutex is locked\n", 1134 (unsigned long long)oi->ip_blkno); 1135 mutex_unlock(&oi->ip_io_mutex); 1136 1137 /* 1138 * down_trylock() returns 0, down_write_trylock() returns 1 1139 * kernel 1, world 0 1140 */ 1141 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem), 1142 "Clear inode of %llu, alloc_sem is locked\n", 1143 (unsigned long long)oi->ip_blkno); 1144 up_write(&oi->ip_alloc_sem); 1145 1146 mlog_bug_on_msg(oi->ip_open_count, 1147 "Clear inode of %llu has open count %d\n", 1148 (unsigned long long)oi->ip_blkno, oi->ip_open_count); 1149 1150 /* Clear all other flags. */ 1151 oi->ip_flags = 0; 1152 oi->ip_dir_start_lookup = 0; 1153 oi->ip_blkno = 0ULL; 1154 1155 /* 1156 * ip_jinode is used to track txns against this inode. We ensure that 1157 * the journal is flushed before journal shutdown. Thus it is safe to 1158 * have inodes get cleaned up after journal shutdown. 1159 */ 1160 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal, 1161 &oi->ip_jinode); 1162 } 1163 1164 void ocfs2_evict_inode(struct inode *inode) 1165 { 1166 if (!inode->i_nlink || 1167 (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) { 1168 ocfs2_delete_inode(inode); 1169 } else { 1170 truncate_inode_pages(&inode->i_data, 0); 1171 } 1172 ocfs2_clear_inode(inode); 1173 } 1174 1175 /* Called under inode_lock, with no more references on the 1176 * struct inode, so it's safe here to check the flags field 1177 * and to manipulate i_nlink without any other locks. */ 1178 int ocfs2_drop_inode(struct inode *inode) 1179 { 1180 struct ocfs2_inode_info *oi = OCFS2_I(inode); 1181 int res; 1182 1183 trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno, 1184 inode->i_nlink, oi->ip_flags); 1185 1186 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) 1187 res = 1; 1188 else 1189 res = generic_drop_inode(inode); 1190 1191 return res; 1192 } 1193 1194 /* 1195 * This is called from our getattr. 1196 */ 1197 int ocfs2_inode_revalidate(struct dentry *dentry) 1198 { 1199 struct inode *inode = dentry->d_inode; 1200 int status = 0; 1201 1202 trace_ocfs2_inode_revalidate(inode, 1203 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL, 1204 inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0); 1205 1206 if (!inode) { 1207 status = -ENOENT; 1208 goto bail; 1209 } 1210 1211 spin_lock(&OCFS2_I(inode)->ip_lock); 1212 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { 1213 spin_unlock(&OCFS2_I(inode)->ip_lock); 1214 status = -ENOENT; 1215 goto bail; 1216 } 1217 spin_unlock(&OCFS2_I(inode)->ip_lock); 1218 1219 /* Let ocfs2_inode_lock do the work of updating our struct 1220 * inode for us. */ 1221 status = ocfs2_inode_lock(inode, NULL, 0); 1222 if (status < 0) { 1223 if (status != -ENOENT) 1224 mlog_errno(status); 1225 goto bail; 1226 } 1227 ocfs2_inode_unlock(inode, 0); 1228 bail: 1229 return status; 1230 } 1231 1232 /* 1233 * Updates a disk inode from a 1234 * struct inode. 1235 * Only takes ip_lock. 1236 */ 1237 int ocfs2_mark_inode_dirty(handle_t *handle, 1238 struct inode *inode, 1239 struct buffer_head *bh) 1240 { 1241 int status; 1242 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; 1243 1244 trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno); 1245 1246 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, 1247 OCFS2_JOURNAL_ACCESS_WRITE); 1248 if (status < 0) { 1249 mlog_errno(status); 1250 goto leave; 1251 } 1252 1253 spin_lock(&OCFS2_I(inode)->ip_lock); 1254 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters); 1255 ocfs2_get_inode_flags(OCFS2_I(inode)); 1256 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr); 1257 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); 1258 spin_unlock(&OCFS2_I(inode)->ip_lock); 1259 1260 fe->i_size = cpu_to_le64(i_size_read(inode)); 1261 ocfs2_set_links_count(fe, inode->i_nlink); 1262 fe->i_uid = cpu_to_le32(inode->i_uid); 1263 fe->i_gid = cpu_to_le32(inode->i_gid); 1264 fe->i_mode = cpu_to_le16(inode->i_mode); 1265 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 1266 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 1267 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 1268 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 1269 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 1270 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 1271 1272 ocfs2_journal_dirty(handle, bh); 1273 leave: 1274 return status; 1275 } 1276 1277 /* 1278 * 1279 * Updates a struct inode from a disk inode. 1280 * does no i/o, only takes ip_lock. 1281 */ 1282 void ocfs2_refresh_inode(struct inode *inode, 1283 struct ocfs2_dinode *fe) 1284 { 1285 spin_lock(&OCFS2_I(inode)->ip_lock); 1286 1287 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 1288 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); 1289 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features); 1290 ocfs2_set_inode_flags(inode); 1291 i_size_write(inode, le64_to_cpu(fe->i_size)); 1292 set_nlink(inode, ocfs2_read_links_count(fe)); 1293 inode->i_uid = le32_to_cpu(fe->i_uid); 1294 inode->i_gid = le32_to_cpu(fe->i_gid); 1295 inode->i_mode = le16_to_cpu(fe->i_mode); 1296 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0) 1297 inode->i_blocks = 0; 1298 else 1299 inode->i_blocks = ocfs2_inode_sector_count(inode); 1300 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 1301 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 1302 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 1303 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 1304 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 1305 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 1306 1307 spin_unlock(&OCFS2_I(inode)->ip_lock); 1308 } 1309 1310 int ocfs2_validate_inode_block(struct super_block *sb, 1311 struct buffer_head *bh) 1312 { 1313 int rc; 1314 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1315 1316 trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr); 1317 1318 BUG_ON(!buffer_uptodate(bh)); 1319 1320 /* 1321 * If the ecc fails, we return the error but otherwise 1322 * leave the filesystem running. We know any error is 1323 * local to this block. 1324 */ 1325 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check); 1326 if (rc) { 1327 mlog(ML_ERROR, "Checksum failed for dinode %llu\n", 1328 (unsigned long long)bh->b_blocknr); 1329 goto bail; 1330 } 1331 1332 /* 1333 * Errors after here are fatal. 1334 */ 1335 1336 rc = -EINVAL; 1337 1338 if (!OCFS2_IS_VALID_DINODE(di)) { 1339 ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n", 1340 (unsigned long long)bh->b_blocknr, 7, 1341 di->i_signature); 1342 goto bail; 1343 } 1344 1345 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) { 1346 ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n", 1347 (unsigned long long)bh->b_blocknr, 1348 (unsigned long long)le64_to_cpu(di->i_blkno)); 1349 goto bail; 1350 } 1351 1352 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) { 1353 ocfs2_error(sb, 1354 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n", 1355 (unsigned long long)bh->b_blocknr); 1356 goto bail; 1357 } 1358 1359 if (le32_to_cpu(di->i_fs_generation) != 1360 OCFS2_SB(sb)->fs_generation) { 1361 ocfs2_error(sb, 1362 "Invalid dinode #%llu: fs_generation is %u\n", 1363 (unsigned long long)bh->b_blocknr, 1364 le32_to_cpu(di->i_fs_generation)); 1365 goto bail; 1366 } 1367 1368 rc = 0; 1369 1370 bail: 1371 return rc; 1372 } 1373 1374 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, 1375 int flags) 1376 { 1377 int rc; 1378 struct buffer_head *tmp = *bh; 1379 1380 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno, 1381 1, &tmp, flags, ocfs2_validate_inode_block); 1382 1383 /* If ocfs2_read_blocks() got us a new bh, pass it up. */ 1384 if (!rc && !*bh) 1385 *bh = tmp; 1386 1387 return rc; 1388 } 1389 1390 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh) 1391 { 1392 return ocfs2_read_inode_block_full(inode, bh, 0); 1393 } 1394 1395 1396 static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci) 1397 { 1398 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1399 1400 return oi->ip_blkno; 1401 } 1402 1403 static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci) 1404 { 1405 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1406 1407 return oi->vfs_inode.i_sb; 1408 } 1409 1410 static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci) 1411 { 1412 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1413 1414 spin_lock(&oi->ip_lock); 1415 } 1416 1417 static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci) 1418 { 1419 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1420 1421 spin_unlock(&oi->ip_lock); 1422 } 1423 1424 static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci) 1425 { 1426 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1427 1428 mutex_lock(&oi->ip_io_mutex); 1429 } 1430 1431 static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci) 1432 { 1433 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1434 1435 mutex_unlock(&oi->ip_io_mutex); 1436 } 1437 1438 const struct ocfs2_caching_operations ocfs2_inode_caching_ops = { 1439 .co_owner = ocfs2_inode_cache_owner, 1440 .co_get_super = ocfs2_inode_cache_get_super, 1441 .co_cache_lock = ocfs2_inode_cache_lock, 1442 .co_cache_unlock = ocfs2_inode_cache_unlock, 1443 .co_io_lock = ocfs2_inode_cache_io_lock, 1444 .co_io_unlock = ocfs2_inode_cache_io_unlock, 1445 }; 1446 1447