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 #define MLOG_MASK_PREFIX ML_INODE 35 #include <cluster/masklog.h> 36 37 #include "ocfs2.h" 38 39 #include "alloc.h" 40 #include "dir.h" 41 #include "blockcheck.h" 42 #include "dlmglue.h" 43 #include "extent_map.h" 44 #include "file.h" 45 #include "heartbeat.h" 46 #include "inode.h" 47 #include "journal.h" 48 #include "namei.h" 49 #include "suballoc.h" 50 #include "super.h" 51 #include "symlink.h" 52 #include "sysfile.h" 53 #include "uptodate.h" 54 #include "xattr.h" 55 #include "refcounttree.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 mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno); 135 136 /* Ok. By now we've either got the offsets passed to us by the 137 * caller, or we just pulled them off the bh. Lets do some 138 * sanity checks to make sure they're OK. */ 139 if (blkno == 0) { 140 inode = ERR_PTR(-EINVAL); 141 mlog_errno(PTR_ERR(inode)); 142 goto bail; 143 } 144 145 args.fi_blkno = blkno; 146 args.fi_flags = flags; 147 args.fi_ino = ino_from_blkno(sb, blkno); 148 args.fi_sysfile_type = sysfile_type; 149 150 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor, 151 ocfs2_init_locked_inode, &args); 152 /* inode was *not* in the inode cache. 2.6.x requires 153 * us to do our own read_inode call and unlock it 154 * afterwards. */ 155 if (inode && inode->i_state & I_NEW) { 156 mlog(0, "Inode was not in inode cache, reading it.\n"); 157 ocfs2_read_locked_inode(inode, &args); 158 unlock_new_inode(inode); 159 } 160 if (inode == NULL) { 161 inode = ERR_PTR(-ENOMEM); 162 mlog_errno(PTR_ERR(inode)); 163 goto bail; 164 } 165 if (is_bad_inode(inode)) { 166 iput(inode); 167 inode = ERR_PTR(-ESTALE); 168 goto bail; 169 } 170 171 bail: 172 if (!IS_ERR(inode)) { 173 mlog(0, "returning inode with number %llu\n", 174 (unsigned long long)OCFS2_I(inode)->ip_blkno); 175 mlog_exit_ptr(inode); 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 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque); 196 197 args = opaque; 198 199 mlog_bug_on_msg(!inode, "No inode in find actor!\n"); 200 201 if (oi->ip_blkno != args->fi_blkno) 202 goto bail; 203 204 ret = 1; 205 bail: 206 mlog_exit(ret); 207 return ret; 208 } 209 210 /* 211 * initialize the new inode, but don't do anything that would cause 212 * us to sleep. 213 * return 0 on success, 1 on failure 214 */ 215 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque) 216 { 217 struct ocfs2_find_inode_args *args = opaque; 218 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key, 219 ocfs2_file_ip_alloc_sem_key; 220 221 mlog_entry("inode = %p, opaque = %p\n", inode, opaque); 222 223 inode->i_ino = args->fi_ino; 224 OCFS2_I(inode)->ip_blkno = args->fi_blkno; 225 if (args->fi_sysfile_type != 0) 226 lockdep_set_class(&inode->i_mutex, 227 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]); 228 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE || 229 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE || 230 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE || 231 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE) 232 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem, 233 &ocfs2_quota_ip_alloc_sem_key); 234 else 235 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem, 236 &ocfs2_file_ip_alloc_sem_key); 237 238 mlog_exit(0); 239 return 0; 240 } 241 242 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 243 int create_ino) 244 { 245 struct super_block *sb; 246 struct ocfs2_super *osb; 247 int use_plocks = 1; 248 249 mlog_entry("(0x%p, size:%llu)\n", inode, 250 (unsigned long long)le64_to_cpu(fe->i_size)); 251 252 sb = inode->i_sb; 253 osb = OCFS2_SB(sb); 254 255 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) || 256 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks()) 257 use_plocks = 0; 258 259 /* 260 * These have all been checked by ocfs2_read_inode_block() or set 261 * by ocfs2_mknod_locked(), so a failure is a code bug. 262 */ 263 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode 264 cannot create a superblock 265 inode today. change if 266 that is needed. */ 267 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))); 268 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation); 269 270 271 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 272 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); 273 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features); 274 275 inode->i_version = 1; 276 inode->i_generation = le32_to_cpu(fe->i_generation); 277 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 278 inode->i_mode = le16_to_cpu(fe->i_mode); 279 inode->i_uid = le32_to_cpu(fe->i_uid); 280 inode->i_gid = le32_to_cpu(fe->i_gid); 281 282 /* Fast symlinks will have i_size but no allocated clusters. */ 283 if (S_ISLNK(inode->i_mode) && !fe->i_clusters) 284 inode->i_blocks = 0; 285 else 286 inode->i_blocks = ocfs2_inode_sector_count(inode); 287 inode->i_mapping->a_ops = &ocfs2_aops; 288 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 289 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 290 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 291 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 292 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 293 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 294 295 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno)) 296 mlog(ML_ERROR, 297 "ip_blkno %llu != i_blkno %llu!\n", 298 (unsigned long long)OCFS2_I(inode)->ip_blkno, 299 (unsigned long long)le64_to_cpu(fe->i_blkno)); 300 301 inode->i_nlink = ocfs2_read_links_count(fe); 302 303 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) { 304 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE; 305 inode->i_flags |= S_NOQUOTA; 306 } 307 308 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) { 309 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 310 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino); 311 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) { 312 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 313 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) { 314 inode->i_flags |= S_NOQUOTA; 315 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) { 316 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino); 317 /* we can't actually hit this as read_inode can't 318 * handle superblocks today ;-) */ 319 BUG(); 320 } 321 322 switch (inode->i_mode & S_IFMT) { 323 case S_IFREG: 324 if (use_plocks) 325 inode->i_fop = &ocfs2_fops; 326 else 327 inode->i_fop = &ocfs2_fops_no_plocks; 328 inode->i_op = &ocfs2_file_iops; 329 i_size_write(inode, le64_to_cpu(fe->i_size)); 330 break; 331 case S_IFDIR: 332 inode->i_op = &ocfs2_dir_iops; 333 if (use_plocks) 334 inode->i_fop = &ocfs2_dops; 335 else 336 inode->i_fop = &ocfs2_dops_no_plocks; 337 i_size_write(inode, le64_to_cpu(fe->i_size)); 338 break; 339 case S_IFLNK: 340 if (ocfs2_inode_is_fast_symlink(inode)) 341 inode->i_op = &ocfs2_fast_symlink_inode_operations; 342 else 343 inode->i_op = &ocfs2_symlink_inode_operations; 344 i_size_write(inode, le64_to_cpu(fe->i_size)); 345 break; 346 default: 347 inode->i_op = &ocfs2_special_file_iops; 348 init_special_inode(inode, inode->i_mode, 349 inode->i_rdev); 350 break; 351 } 352 353 if (create_ino) { 354 inode->i_ino = ino_from_blkno(inode->i_sb, 355 le64_to_cpu(fe->i_blkno)); 356 357 /* 358 * If we ever want to create system files from kernel, 359 * the generation argument to 360 * ocfs2_inode_lock_res_init() will have to change. 361 */ 362 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL); 363 364 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres, 365 OCFS2_LOCK_TYPE_META, 0, inode); 366 367 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, 368 OCFS2_LOCK_TYPE_OPEN, 0, inode); 369 } 370 371 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres, 372 OCFS2_LOCK_TYPE_RW, inode->i_generation, 373 inode); 374 375 ocfs2_set_inode_flags(inode); 376 377 OCFS2_I(inode)->ip_last_used_slot = 0; 378 OCFS2_I(inode)->ip_last_used_group = 0; 379 mlog_exit_void(); 380 } 381 382 static int ocfs2_read_locked_inode(struct inode *inode, 383 struct ocfs2_find_inode_args *args) 384 { 385 struct super_block *sb; 386 struct ocfs2_super *osb; 387 struct ocfs2_dinode *fe; 388 struct buffer_head *bh = NULL; 389 int status, can_lock; 390 u32 generation = 0; 391 392 mlog_entry("(0x%p, 0x%p)\n", inode, args); 393 394 status = -EINVAL; 395 if (inode == NULL || inode->i_sb == NULL) { 396 mlog(ML_ERROR, "bad inode\n"); 397 return status; 398 } 399 sb = inode->i_sb; 400 osb = OCFS2_SB(sb); 401 402 if (!args) { 403 mlog(ML_ERROR, "bad inode args\n"); 404 make_bad_inode(inode); 405 return status; 406 } 407 408 /* 409 * To improve performance of cold-cache inode stats, we take 410 * the cluster lock here if possible. 411 * 412 * Generally, OCFS2 never trusts the contents of an inode 413 * unless it's holding a cluster lock, so taking it here isn't 414 * a correctness issue as much as it is a performance 415 * improvement. 416 * 417 * There are three times when taking the lock is not a good idea: 418 * 419 * 1) During startup, before we have initialized the DLM. 420 * 421 * 2) If we are reading certain system files which never get 422 * cluster locks (local alloc, truncate log). 423 * 424 * 3) If the process doing the iget() is responsible for 425 * orphan dir recovery. We're holding the orphan dir lock and 426 * can get into a deadlock with another process on another 427 * node in ->delete_inode(). 428 * 429 * #1 and #2 can be simply solved by never taking the lock 430 * here for system files (which are the only type we read 431 * during mount). It's a heavier approach, but our main 432 * concern is user-accesible files anyway. 433 * 434 * #3 works itself out because we'll eventually take the 435 * cluster lock before trusting anything anyway. 436 */ 437 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE) 438 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) 439 && !ocfs2_mount_local(osb); 440 441 /* 442 * To maintain backwards compatibility with older versions of 443 * ocfs2-tools, we still store the generation value for system 444 * files. The only ones that actually matter to userspace are 445 * the journals, but it's easier and inexpensive to just flag 446 * all system files similarly. 447 */ 448 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE) 449 generation = osb->fs_generation; 450 451 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres, 452 OCFS2_LOCK_TYPE_META, 453 generation, inode); 454 455 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, 456 OCFS2_LOCK_TYPE_OPEN, 457 0, inode); 458 459 if (can_lock) { 460 status = ocfs2_open_lock(inode); 461 if (status) { 462 make_bad_inode(inode); 463 mlog_errno(status); 464 return status; 465 } 466 status = ocfs2_inode_lock(inode, NULL, 0); 467 if (status) { 468 make_bad_inode(inode); 469 mlog_errno(status); 470 return status; 471 } 472 } 473 474 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) { 475 status = ocfs2_try_open_lock(inode, 0); 476 if (status) { 477 make_bad_inode(inode); 478 return status; 479 } 480 } 481 482 if (can_lock) { 483 status = ocfs2_read_inode_block_full(inode, &bh, 484 OCFS2_BH_IGNORE_CACHE); 485 } else { 486 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh); 487 if (!status) 488 status = ocfs2_validate_inode_block(osb->sb, bh); 489 } 490 if (status < 0) { 491 mlog_errno(status); 492 goto bail; 493 } 494 495 status = -EINVAL; 496 fe = (struct ocfs2_dinode *) bh->b_data; 497 498 /* 499 * This is a code bug. Right now the caller needs to 500 * understand whether it is asking for a system file inode or 501 * not so the proper lock names can be built. 502 */ 503 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) != 504 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE), 505 "Inode %llu: system file state is ambigous\n", 506 (unsigned long long)args->fi_blkno); 507 508 if (S_ISCHR(le16_to_cpu(fe->i_mode)) || 509 S_ISBLK(le16_to_cpu(fe->i_mode))) 510 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 511 512 ocfs2_populate_inode(inode, fe, 0); 513 514 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno)); 515 516 status = 0; 517 518 bail: 519 if (can_lock) 520 ocfs2_inode_unlock(inode, 0); 521 522 if (status < 0) 523 make_bad_inode(inode); 524 525 if (args && bh) 526 brelse(bh); 527 528 mlog_exit(status); 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_truncate_context *tc = NULL; 543 struct ocfs2_dinode *fe; 544 handle_t *handle = NULL; 545 546 mlog_entry_void(); 547 548 fe = (struct ocfs2_dinode *) fe_bh->b_data; 549 550 /* 551 * This check will also skip truncate of inodes with inline 552 * data and fast symlinks. 553 */ 554 if (fe->i_clusters) { 555 if (ocfs2_should_order_data(inode)) 556 ocfs2_begin_ordered_truncate(inode, 0); 557 558 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); 559 if (IS_ERR(handle)) { 560 status = PTR_ERR(handle); 561 handle = NULL; 562 mlog_errno(status); 563 goto out; 564 } 565 566 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 567 fe_bh, 568 OCFS2_JOURNAL_ACCESS_WRITE); 569 if (status < 0) { 570 mlog_errno(status); 571 goto out; 572 } 573 574 i_size_write(inode, 0); 575 576 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); 577 if (status < 0) { 578 mlog_errno(status); 579 goto out; 580 } 581 582 ocfs2_commit_trans(osb, handle); 583 handle = NULL; 584 585 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc); 586 if (status < 0) { 587 mlog_errno(status); 588 goto out; 589 } 590 591 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc); 592 if (status < 0) { 593 mlog_errno(status); 594 goto out; 595 } 596 } 597 598 out: 599 if (handle) 600 ocfs2_commit_trans(osb, handle); 601 mlog_exit(status); 602 return status; 603 } 604 605 static int ocfs2_remove_inode(struct inode *inode, 606 struct buffer_head *di_bh, 607 struct inode *orphan_dir_inode, 608 struct buffer_head *orphan_dir_bh) 609 { 610 int status; 611 struct inode *inode_alloc_inode = NULL; 612 struct buffer_head *inode_alloc_bh = NULL; 613 handle_t *handle; 614 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 615 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 616 617 inode_alloc_inode = 618 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, 619 le16_to_cpu(di->i_suballoc_slot)); 620 if (!inode_alloc_inode) { 621 status = -EEXIST; 622 mlog_errno(status); 623 goto bail; 624 } 625 626 mutex_lock(&inode_alloc_inode->i_mutex); 627 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1); 628 if (status < 0) { 629 mutex_unlock(&inode_alloc_inode->i_mutex); 630 631 mlog_errno(status); 632 goto bail; 633 } 634 635 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS + 636 ocfs2_quota_trans_credits(inode->i_sb)); 637 if (IS_ERR(handle)) { 638 status = PTR_ERR(handle); 639 mlog_errno(status); 640 goto bail_unlock; 641 } 642 643 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 644 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 645 orphan_dir_bh); 646 if (status < 0) { 647 mlog_errno(status); 648 goto bail_commit; 649 } 650 } 651 652 /* set the inodes dtime */ 653 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 654 OCFS2_JOURNAL_ACCESS_WRITE); 655 if (status < 0) { 656 mlog_errno(status); 657 goto bail_commit; 658 } 659 660 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec); 661 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL)); 662 663 status = ocfs2_journal_dirty(handle, di_bh); 664 if (status < 0) { 665 mlog_errno(status); 666 goto bail_commit; 667 } 668 669 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh); 670 dquot_free_inode(inode); 671 672 status = ocfs2_free_dinode(handle, inode_alloc_inode, 673 inode_alloc_bh, di); 674 if (status < 0) 675 mlog_errno(status); 676 677 bail_commit: 678 ocfs2_commit_trans(osb, handle); 679 bail_unlock: 680 ocfs2_inode_unlock(inode_alloc_inode, 1); 681 mutex_unlock(&inode_alloc_inode->i_mutex); 682 brelse(inode_alloc_bh); 683 bail: 684 iput(inode_alloc_inode); 685 686 return status; 687 } 688 689 /* 690 * Serialize with orphan dir recovery. If the process doing 691 * recovery on this orphan dir does an iget() with the dir 692 * i_mutex held, we'll deadlock here. Instead we detect this 693 * and exit early - recovery will wipe this inode for us. 694 */ 695 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb, 696 int slot) 697 { 698 int ret = 0; 699 700 spin_lock(&osb->osb_lock); 701 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) { 702 mlog(0, "Recovery is happening on orphan dir %d, will skip " 703 "this inode\n", slot); 704 ret = -EDEADLK; 705 goto out; 706 } 707 /* This signals to the orphan recovery process that it should 708 * wait for us to handle the wipe. */ 709 osb->osb_orphan_wipes[slot]++; 710 out: 711 spin_unlock(&osb->osb_lock); 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 = -EEXIST; 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 /* We shouldn't be getting here for the root directory 823 * inode.. */ 824 if (inode == osb->root_inode) { 825 mlog(ML_ERROR, "Skipping delete of root inode.\n"); 826 goto bail; 827 } 828 829 /* If we're coming from downconvert_thread we can't go into our own 830 * voting [hello, deadlock city!], so unforuntately we just 831 * have to skip deleting this guy. That's OK though because 832 * the node who's doing the actual deleting should handle it 833 * anyway. */ 834 if (current == osb->dc_task) { 835 mlog(0, "Skipping delete of %lu because we're currently " 836 "in downconvert\n", inode->i_ino); 837 goto bail; 838 } 839 840 spin_lock(&oi->ip_lock); 841 /* OCFS2 *never* deletes system files. This should technically 842 * never get here as system file inodes should always have a 843 * positive link count. */ 844 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) { 845 mlog(ML_ERROR, "Skipping delete of system file %llu\n", 846 (unsigned long long)oi->ip_blkno); 847 goto bail_unlock; 848 } 849 850 /* If we have allowd wipe of this inode for another node, it 851 * will be marked here so we can safely skip it. Recovery will 852 * cleanup any inodes we might inadvertantly skip here. */ 853 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) { 854 mlog(0, "Skipping delete of %lu because another node " 855 "has done this for us.\n", inode->i_ino); 856 goto bail_unlock; 857 } 858 859 ret = 1; 860 bail_unlock: 861 spin_unlock(&oi->ip_lock); 862 bail: 863 return ret; 864 } 865 866 /* Query the cluster to determine whether we should wipe an inode from 867 * disk or not. 868 * 869 * Requires the inode to have the cluster lock. */ 870 static int ocfs2_query_inode_wipe(struct inode *inode, 871 struct buffer_head *di_bh, 872 int *wipe) 873 { 874 int status = 0; 875 struct ocfs2_inode_info *oi = OCFS2_I(inode); 876 struct ocfs2_dinode *di; 877 878 *wipe = 0; 879 880 /* While we were waiting for the cluster lock in 881 * ocfs2_delete_inode, another node might have asked to delete 882 * the inode. Recheck our flags to catch this. */ 883 if (!ocfs2_inode_is_valid_to_delete(inode)) { 884 mlog(0, "Skipping delete of %llu because flags changed\n", 885 (unsigned long long)oi->ip_blkno); 886 goto bail; 887 } 888 889 /* Now that we have an up to date inode, we can double check 890 * the link count. */ 891 if (inode->i_nlink) { 892 mlog(0, "Skipping delete of %llu because nlink = %u\n", 893 (unsigned long long)oi->ip_blkno, inode->i_nlink); 894 goto bail; 895 } 896 897 /* Do some basic inode verification... */ 898 di = (struct ocfs2_dinode *) di_bh->b_data; 899 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) && 900 !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) { 901 /* 902 * Inodes in the orphan dir must have ORPHANED_FL. The only 903 * inodes that come back out of the orphan dir are reflink 904 * targets. A reflink target may be moved out of the orphan 905 * dir between the time we scan the directory and the time we 906 * process it. This would lead to HAS_REFCOUNT_FL being set but 907 * ORPHANED_FL not. 908 */ 909 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) { 910 mlog(0, "Reflinked inode %llu is no longer orphaned. " 911 "it shouldn't be deleted\n", 912 (unsigned long long)oi->ip_blkno); 913 goto bail; 914 } 915 916 /* for lack of a better error? */ 917 status = -EEXIST; 918 mlog(ML_ERROR, 919 "Inode %llu (on-disk %llu) not orphaned! " 920 "Disk flags 0x%x, inode flags 0x%x\n", 921 (unsigned long long)oi->ip_blkno, 922 (unsigned long long)le64_to_cpu(di->i_blkno), 923 le32_to_cpu(di->i_flags), oi->ip_flags); 924 goto bail; 925 } 926 927 /* has someone already deleted us?! baaad... */ 928 if (di->i_dtime) { 929 status = -EEXIST; 930 mlog_errno(status); 931 goto bail; 932 } 933 934 /* 935 * This is how ocfs2 determines whether an inode is still live 936 * within the cluster. Every node takes a shared read lock on 937 * the inode open lock in ocfs2_read_locked_inode(). When we 938 * get to ->delete_inode(), each node tries to convert it's 939 * lock to an exclusive. Trylocks are serialized by the inode 940 * meta data lock. If the upconvert suceeds, we know the inode 941 * is no longer live and can be deleted. 942 * 943 * Though we call this with the meta data lock held, the 944 * trylock keeps us from ABBA deadlock. 945 */ 946 status = ocfs2_try_open_lock(inode, 1); 947 if (status == -EAGAIN) { 948 status = 0; 949 mlog(0, "Skipping delete of %llu because it is in use on " 950 "other nodes\n", (unsigned long long)oi->ip_blkno); 951 goto bail; 952 } 953 if (status < 0) { 954 mlog_errno(status); 955 goto bail; 956 } 957 958 *wipe = 1; 959 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n", 960 (unsigned long long)oi->ip_blkno, 961 le16_to_cpu(di->i_orphaned_slot)); 962 963 bail: 964 return status; 965 } 966 967 /* Support function for ocfs2_delete_inode. Will help us keep the 968 * inode data in a consistent state for clear_inode. Always truncates 969 * pages, optionally sync's them first. */ 970 static void ocfs2_cleanup_delete_inode(struct inode *inode, 971 int sync_data) 972 { 973 mlog(0, "Cleanup inode %llu, sync = %d\n", 974 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data); 975 if (sync_data) 976 write_inode_now(inode, 1); 977 truncate_inode_pages(&inode->i_data, 0); 978 } 979 980 void ocfs2_delete_inode(struct inode *inode) 981 { 982 int wipe, status; 983 sigset_t blocked, oldset; 984 struct buffer_head *di_bh = NULL; 985 986 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); 987 988 /* When we fail in read_inode() we mark inode as bad. The second test 989 * catches the case when inode allocation fails before allocating 990 * a block for inode. */ 991 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno) { 992 mlog(0, "Skipping delete of bad inode\n"); 993 goto bail; 994 } 995 996 dquot_initialize(inode); 997 998 if (!ocfs2_inode_is_valid_to_delete(inode)) { 999 /* It's probably not necessary to truncate_inode_pages 1000 * here but we do it for safety anyway (it will most 1001 * likely be a no-op anyway) */ 1002 ocfs2_cleanup_delete_inode(inode, 0); 1003 goto bail; 1004 } 1005 1006 /* We want to block signals in delete_inode as the lock and 1007 * messaging paths may return us -ERESTARTSYS. Which would 1008 * cause us to exit early, resulting in inodes being orphaned 1009 * forever. */ 1010 sigfillset(&blocked); 1011 status = sigprocmask(SIG_BLOCK, &blocked, &oldset); 1012 if (status < 0) { 1013 mlog_errno(status); 1014 ocfs2_cleanup_delete_inode(inode, 1); 1015 goto bail; 1016 } 1017 1018 /* 1019 * Synchronize us against ocfs2_get_dentry. We take this in 1020 * shared mode so that all nodes can still concurrently 1021 * process deletes. 1022 */ 1023 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0); 1024 if (status < 0) { 1025 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status); 1026 ocfs2_cleanup_delete_inode(inode, 0); 1027 goto bail_unblock; 1028 } 1029 /* Lock down the inode. This gives us an up to date view of 1030 * it's metadata (for verification), and allows us to 1031 * serialize delete_inode on multiple nodes. 1032 * 1033 * Even though we might be doing a truncate, we don't take the 1034 * allocation lock here as it won't be needed - nobody will 1035 * have the file open. 1036 */ 1037 status = ocfs2_inode_lock(inode, &di_bh, 1); 1038 if (status < 0) { 1039 if (status != -ENOENT) 1040 mlog_errno(status); 1041 ocfs2_cleanup_delete_inode(inode, 0); 1042 goto bail_unlock_nfs_sync; 1043 } 1044 1045 /* Query the cluster. This will be the final decision made 1046 * before we go ahead and wipe the inode. */ 1047 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe); 1048 if (!wipe || status < 0) { 1049 /* Error and remote inode busy both mean we won't be 1050 * removing the inode, so they take almost the same 1051 * path. */ 1052 if (status < 0) 1053 mlog_errno(status); 1054 1055 /* Someone in the cluster has disallowed a wipe of 1056 * this inode, or it was never completely 1057 * orphaned. Write out the pages and exit now. */ 1058 ocfs2_cleanup_delete_inode(inode, 1); 1059 goto bail_unlock_inode; 1060 } 1061 1062 ocfs2_cleanup_delete_inode(inode, 0); 1063 1064 status = ocfs2_wipe_inode(inode, di_bh); 1065 if (status < 0) { 1066 if (status != -EDEADLK) 1067 mlog_errno(status); 1068 goto bail_unlock_inode; 1069 } 1070 1071 /* 1072 * Mark the inode as successfully deleted. 1073 * 1074 * This is important for ocfs2_clear_inode() as it will check 1075 * this flag and skip any checkpointing work 1076 * 1077 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate 1078 * the LVB for other nodes. 1079 */ 1080 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED; 1081 1082 bail_unlock_inode: 1083 ocfs2_inode_unlock(inode, 1); 1084 brelse(di_bh); 1085 1086 bail_unlock_nfs_sync: 1087 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0); 1088 1089 bail_unblock: 1090 status = sigprocmask(SIG_SETMASK, &oldset, NULL); 1091 if (status < 0) 1092 mlog_errno(status); 1093 bail: 1094 clear_inode(inode); 1095 mlog_exit_void(); 1096 } 1097 1098 void ocfs2_clear_inode(struct inode *inode) 1099 { 1100 int status; 1101 struct ocfs2_inode_info *oi = OCFS2_I(inode); 1102 1103 mlog_entry_void(); 1104 1105 if (!inode) 1106 goto bail; 1107 1108 mlog(0, "Clearing inode: %llu, nlink = %u\n", 1109 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink); 1110 1111 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL, 1112 "Inode=%lu\n", inode->i_ino); 1113 1114 dquot_drop(inode); 1115 1116 /* To preven remote deletes we hold open lock before, now it 1117 * is time to unlock PR and EX open locks. */ 1118 ocfs2_open_unlock(inode); 1119 1120 /* Do these before all the other work so that we don't bounce 1121 * the downconvert thread while waiting to destroy the locks. */ 1122 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres); 1123 ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres); 1124 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres); 1125 1126 /* We very well may get a clear_inode before all an inodes 1127 * metadata has hit disk. Of course, we can't drop any cluster 1128 * locks until the journal has finished with it. The only 1129 * exception here are successfully wiped inodes - their 1130 * metadata can now be considered to be part of the system 1131 * inodes from which it came. */ 1132 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED)) 1133 ocfs2_checkpoint_inode(inode); 1134 1135 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers), 1136 "Clear inode of %llu, inode has io markers\n", 1137 (unsigned long long)oi->ip_blkno); 1138 1139 ocfs2_extent_map_trunc(inode, 0); 1140 1141 status = ocfs2_drop_inode_locks(inode); 1142 if (status < 0) 1143 mlog_errno(status); 1144 1145 ocfs2_lock_res_free(&oi->ip_rw_lockres); 1146 ocfs2_lock_res_free(&oi->ip_inode_lockres); 1147 ocfs2_lock_res_free(&oi->ip_open_lockres); 1148 1149 ocfs2_metadata_cache_exit(INODE_CACHE(inode)); 1150 1151 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached, 1152 "Clear inode of %llu, inode has %u cache items\n", 1153 (unsigned long long)oi->ip_blkno, 1154 INODE_CACHE(inode)->ci_num_cached); 1155 1156 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE), 1157 "Clear inode of %llu, inode has a bad flag\n", 1158 (unsigned long long)oi->ip_blkno); 1159 1160 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock), 1161 "Clear inode of %llu, inode is locked\n", 1162 (unsigned long long)oi->ip_blkno); 1163 1164 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex), 1165 "Clear inode of %llu, io_mutex is locked\n", 1166 (unsigned long long)oi->ip_blkno); 1167 mutex_unlock(&oi->ip_io_mutex); 1168 1169 /* 1170 * down_trylock() returns 0, down_write_trylock() returns 1 1171 * kernel 1, world 0 1172 */ 1173 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem), 1174 "Clear inode of %llu, alloc_sem is locked\n", 1175 (unsigned long long)oi->ip_blkno); 1176 up_write(&oi->ip_alloc_sem); 1177 1178 mlog_bug_on_msg(oi->ip_open_count, 1179 "Clear inode of %llu has open count %d\n", 1180 (unsigned long long)oi->ip_blkno, oi->ip_open_count); 1181 1182 /* Clear all other flags. */ 1183 oi->ip_flags = 0; 1184 oi->ip_dir_start_lookup = 0; 1185 oi->ip_blkno = 0ULL; 1186 1187 /* 1188 * ip_jinode is used to track txns against this inode. We ensure that 1189 * the journal is flushed before journal shutdown. Thus it is safe to 1190 * have inodes get cleaned up after journal shutdown. 1191 */ 1192 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal, 1193 &oi->ip_jinode); 1194 1195 bail: 1196 mlog_exit_void(); 1197 } 1198 1199 /* Called under inode_lock, with no more references on the 1200 * struct inode, so it's safe here to check the flags field 1201 * and to manipulate i_nlink without any other locks. */ 1202 void ocfs2_drop_inode(struct inode *inode) 1203 { 1204 struct ocfs2_inode_info *oi = OCFS2_I(inode); 1205 1206 mlog_entry_void(); 1207 1208 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n", 1209 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags); 1210 1211 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) 1212 generic_delete_inode(inode); 1213 else 1214 generic_drop_inode(inode); 1215 1216 mlog_exit_void(); 1217 } 1218 1219 /* 1220 * This is called from our getattr. 1221 */ 1222 int ocfs2_inode_revalidate(struct dentry *dentry) 1223 { 1224 struct inode *inode = dentry->d_inode; 1225 int status = 0; 1226 1227 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode, 1228 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL); 1229 1230 if (!inode) { 1231 mlog(0, "eep, no inode!\n"); 1232 status = -ENOENT; 1233 goto bail; 1234 } 1235 1236 spin_lock(&OCFS2_I(inode)->ip_lock); 1237 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { 1238 spin_unlock(&OCFS2_I(inode)->ip_lock); 1239 mlog(0, "inode deleted!\n"); 1240 status = -ENOENT; 1241 goto bail; 1242 } 1243 spin_unlock(&OCFS2_I(inode)->ip_lock); 1244 1245 /* Let ocfs2_inode_lock do the work of updating our struct 1246 * inode for us. */ 1247 status = ocfs2_inode_lock(inode, NULL, 0); 1248 if (status < 0) { 1249 if (status != -ENOENT) 1250 mlog_errno(status); 1251 goto bail; 1252 } 1253 ocfs2_inode_unlock(inode, 0); 1254 bail: 1255 mlog_exit(status); 1256 1257 return status; 1258 } 1259 1260 /* 1261 * Updates a disk inode from a 1262 * struct inode. 1263 * Only takes ip_lock. 1264 */ 1265 int ocfs2_mark_inode_dirty(handle_t *handle, 1266 struct inode *inode, 1267 struct buffer_head *bh) 1268 { 1269 int status; 1270 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; 1271 1272 mlog_entry("(inode %llu)\n", 1273 (unsigned long long)OCFS2_I(inode)->ip_blkno); 1274 1275 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, 1276 OCFS2_JOURNAL_ACCESS_WRITE); 1277 if (status < 0) { 1278 mlog_errno(status); 1279 goto leave; 1280 } 1281 1282 spin_lock(&OCFS2_I(inode)->ip_lock); 1283 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters); 1284 ocfs2_get_inode_flags(OCFS2_I(inode)); 1285 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr); 1286 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); 1287 spin_unlock(&OCFS2_I(inode)->ip_lock); 1288 1289 fe->i_size = cpu_to_le64(i_size_read(inode)); 1290 ocfs2_set_links_count(fe, inode->i_nlink); 1291 fe->i_uid = cpu_to_le32(inode->i_uid); 1292 fe->i_gid = cpu_to_le32(inode->i_gid); 1293 fe->i_mode = cpu_to_le16(inode->i_mode); 1294 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 1295 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 1296 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 1297 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 1298 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 1299 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 1300 1301 status = ocfs2_journal_dirty(handle, bh); 1302 if (status < 0) 1303 mlog_errno(status); 1304 1305 status = 0; 1306 leave: 1307 1308 mlog_exit(status); 1309 return status; 1310 } 1311 1312 /* 1313 * 1314 * Updates a struct inode from a disk inode. 1315 * does no i/o, only takes ip_lock. 1316 */ 1317 void ocfs2_refresh_inode(struct inode *inode, 1318 struct ocfs2_dinode *fe) 1319 { 1320 spin_lock(&OCFS2_I(inode)->ip_lock); 1321 1322 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 1323 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); 1324 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features); 1325 ocfs2_set_inode_flags(inode); 1326 i_size_write(inode, le64_to_cpu(fe->i_size)); 1327 inode->i_nlink = ocfs2_read_links_count(fe); 1328 inode->i_uid = le32_to_cpu(fe->i_uid); 1329 inode->i_gid = le32_to_cpu(fe->i_gid); 1330 inode->i_mode = le16_to_cpu(fe->i_mode); 1331 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0) 1332 inode->i_blocks = 0; 1333 else 1334 inode->i_blocks = ocfs2_inode_sector_count(inode); 1335 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 1336 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 1337 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 1338 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 1339 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 1340 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 1341 1342 spin_unlock(&OCFS2_I(inode)->ip_lock); 1343 } 1344 1345 int ocfs2_validate_inode_block(struct super_block *sb, 1346 struct buffer_head *bh) 1347 { 1348 int rc; 1349 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1350 1351 mlog(0, "Validating dinode %llu\n", 1352 (unsigned long long)bh->b_blocknr); 1353 1354 BUG_ON(!buffer_uptodate(bh)); 1355 1356 /* 1357 * If the ecc fails, we return the error but otherwise 1358 * leave the filesystem running. We know any error is 1359 * local to this block. 1360 */ 1361 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check); 1362 if (rc) { 1363 mlog(ML_ERROR, "Checksum failed for dinode %llu\n", 1364 (unsigned long long)bh->b_blocknr); 1365 goto bail; 1366 } 1367 1368 /* 1369 * Errors after here are fatal. 1370 */ 1371 1372 rc = -EINVAL; 1373 1374 if (!OCFS2_IS_VALID_DINODE(di)) { 1375 ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n", 1376 (unsigned long long)bh->b_blocknr, 7, 1377 di->i_signature); 1378 goto bail; 1379 } 1380 1381 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) { 1382 ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n", 1383 (unsigned long long)bh->b_blocknr, 1384 (unsigned long long)le64_to_cpu(di->i_blkno)); 1385 goto bail; 1386 } 1387 1388 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) { 1389 ocfs2_error(sb, 1390 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n", 1391 (unsigned long long)bh->b_blocknr); 1392 goto bail; 1393 } 1394 1395 if (le32_to_cpu(di->i_fs_generation) != 1396 OCFS2_SB(sb)->fs_generation) { 1397 ocfs2_error(sb, 1398 "Invalid dinode #%llu: fs_generation is %u\n", 1399 (unsigned long long)bh->b_blocknr, 1400 le32_to_cpu(di->i_fs_generation)); 1401 goto bail; 1402 } 1403 1404 rc = 0; 1405 1406 bail: 1407 return rc; 1408 } 1409 1410 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, 1411 int flags) 1412 { 1413 int rc; 1414 struct buffer_head *tmp = *bh; 1415 1416 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno, 1417 1, &tmp, flags, ocfs2_validate_inode_block); 1418 1419 /* If ocfs2_read_blocks() got us a new bh, pass it up. */ 1420 if (!rc && !*bh) 1421 *bh = tmp; 1422 1423 return rc; 1424 } 1425 1426 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh) 1427 { 1428 return ocfs2_read_inode_block_full(inode, bh, 0); 1429 } 1430 1431 1432 static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci) 1433 { 1434 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1435 1436 return oi->ip_blkno; 1437 } 1438 1439 static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci) 1440 { 1441 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1442 1443 return oi->vfs_inode.i_sb; 1444 } 1445 1446 static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci) 1447 { 1448 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1449 1450 spin_lock(&oi->ip_lock); 1451 } 1452 1453 static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci) 1454 { 1455 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1456 1457 spin_unlock(&oi->ip_lock); 1458 } 1459 1460 static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci) 1461 { 1462 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1463 1464 mutex_lock(&oi->ip_io_mutex); 1465 } 1466 1467 static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci) 1468 { 1469 struct ocfs2_inode_info *oi = cache_info_to_inode(ci); 1470 1471 mutex_unlock(&oi->ip_io_mutex); 1472 } 1473 1474 const struct ocfs2_caching_operations ocfs2_inode_caching_ops = { 1475 .co_owner = ocfs2_inode_cache_owner, 1476 .co_get_super = ocfs2_inode_cache_get_super, 1477 .co_cache_lock = ocfs2_inode_cache_lock, 1478 .co_cache_unlock = ocfs2_inode_cache_unlock, 1479 .co_io_lock = ocfs2_inode_cache_io_lock, 1480 .co_io_unlock = ocfs2_inode_cache_io_unlock, 1481 }; 1482 1483