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/slab.h> 29 #include <linux/highmem.h> 30 #include <linux/pagemap.h> 31 #include <linux/smp_lock.h> 32 33 #include <asm/byteorder.h> 34 35 #define MLOG_MASK_PREFIX ML_INODE 36 #include <cluster/masklog.h> 37 38 #include "ocfs2.h" 39 40 #include "alloc.h" 41 #include "dlmglue.h" 42 #include "extent_map.h" 43 #include "file.h" 44 #include "inode.h" 45 #include "journal.h" 46 #include "namei.h" 47 #include "suballoc.h" 48 #include "super.h" 49 #include "symlink.h" 50 #include "sysfile.h" 51 #include "uptodate.h" 52 #include "vote.h" 53 54 #include "buffer_head_io.h" 55 56 #define OCFS2_FI_FLAG_NOWAIT 0x1 57 #define OCFS2_FI_FLAG_DELETE 0x2 58 struct ocfs2_find_inode_args 59 { 60 u64 fi_blkno; 61 unsigned long fi_ino; 62 unsigned int fi_flags; 63 }; 64 65 static int ocfs2_read_locked_inode(struct inode *inode, 66 struct ocfs2_find_inode_args *args); 67 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque); 68 static int ocfs2_find_actor(struct inode *inode, void *opaque); 69 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, 70 struct inode *inode, 71 struct buffer_head *fe_bh); 72 73 struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb, 74 u64 blkno, 75 int delete_vote) 76 { 77 struct ocfs2_find_inode_args args; 78 79 /* ocfs2_ilookup_for_vote should *only* be called from the 80 * vote thread */ 81 BUG_ON(current != osb->vote_task); 82 83 args.fi_blkno = blkno; 84 args.fi_flags = OCFS2_FI_FLAG_NOWAIT; 85 if (delete_vote) 86 args.fi_flags |= OCFS2_FI_FLAG_DELETE; 87 args.fi_ino = ino_from_blkno(osb->sb, blkno); 88 return ilookup5(osb->sb, args.fi_ino, ocfs2_find_actor, &args); 89 } 90 91 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno) 92 { 93 struct inode *inode = NULL; 94 struct super_block *sb = osb->sb; 95 struct ocfs2_find_inode_args args; 96 97 mlog_entry("(blkno = %"MLFu64")\n", blkno); 98 99 /* Ok. By now we've either got the offsets passed to us by the 100 * caller, or we just pulled them off the bh. Lets do some 101 * sanity checks to make sure they're OK. */ 102 if (blkno == 0) { 103 inode = ERR_PTR(-EINVAL); 104 mlog_errno(PTR_ERR(inode)); 105 goto bail; 106 } 107 108 args.fi_blkno = blkno; 109 args.fi_flags = 0; 110 args.fi_ino = ino_from_blkno(sb, blkno); 111 112 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor, 113 ocfs2_init_locked_inode, &args); 114 /* inode was *not* in the inode cache. 2.6.x requires 115 * us to do our own read_inode call and unlock it 116 * afterwards. */ 117 if (inode && inode->i_state & I_NEW) { 118 mlog(0, "Inode was not in inode cache, reading it.\n"); 119 ocfs2_read_locked_inode(inode, &args); 120 unlock_new_inode(inode); 121 } 122 if (inode == NULL) { 123 inode = ERR_PTR(-ENOMEM); 124 mlog_errno(PTR_ERR(inode)); 125 goto bail; 126 } 127 if (is_bad_inode(inode)) { 128 iput(inode); 129 inode = ERR_PTR(-ESTALE); 130 mlog_errno(PTR_ERR(inode)); 131 goto bail; 132 } 133 134 bail: 135 if (!IS_ERR(inode)) { 136 mlog(0, "returning inode with number %"MLFu64"\n", 137 OCFS2_I(inode)->ip_blkno); 138 mlog_exit_ptr(inode); 139 } else 140 mlog_errno(PTR_ERR(inode)); 141 142 return inode; 143 } 144 145 146 /* 147 * here's how inodes get read from disk: 148 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR 149 * found? : return the in-memory inode 150 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE 151 */ 152 153 static int ocfs2_find_actor(struct inode *inode, void *opaque) 154 { 155 struct ocfs2_find_inode_args *args = NULL; 156 struct ocfs2_inode_info *oi = OCFS2_I(inode); 157 int ret = 0; 158 159 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque); 160 161 args = opaque; 162 163 mlog_bug_on_msg(!inode, "No inode in find actor!\n"); 164 165 if (oi->ip_blkno != args->fi_blkno) 166 goto bail; 167 168 /* OCFS2_FI_FLAG_NOWAIT is *only* set from 169 * ocfs2_ilookup_for_vote which won't create an inode for one 170 * that isn't found. The vote thread which doesn't want to get 171 * an inode which is in the process of going away - otherwise 172 * the call to __wait_on_freeing_inode in find_inode_fast will 173 * cause it to deadlock on an inode which may be waiting on a 174 * vote (or lock release) in delete_inode */ 175 if ((args->fi_flags & OCFS2_FI_FLAG_NOWAIT) && 176 (inode->i_state & (I_FREEING|I_CLEAR))) { 177 /* As stated above, we're not going to return an 178 * inode. In the case of a delete vote, the voting 179 * code is going to signal the other node to go 180 * ahead. Mark that state here, so this freeing inode 181 * has the state when it gets to delete_inode. */ 182 if (args->fi_flags & OCFS2_FI_FLAG_DELETE) { 183 spin_lock(&oi->ip_lock); 184 ocfs2_mark_inode_remotely_deleted(inode); 185 spin_unlock(&oi->ip_lock); 186 } 187 goto bail; 188 } 189 190 ret = 1; 191 bail: 192 mlog_exit(ret); 193 return ret; 194 } 195 196 /* 197 * initialize the new inode, but don't do anything that would cause 198 * us to sleep. 199 * return 0 on success, 1 on failure 200 */ 201 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque) 202 { 203 struct ocfs2_find_inode_args *args = opaque; 204 205 mlog_entry("inode = %p, opaque = %p\n", inode, opaque); 206 207 inode->i_ino = args->fi_ino; 208 OCFS2_I(inode)->ip_blkno = args->fi_blkno; 209 210 mlog_exit(0); 211 return 0; 212 } 213 214 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 215 int create_ino) 216 { 217 struct super_block *sb; 218 struct ocfs2_super *osb; 219 int status = -EINVAL; 220 221 mlog_entry("(0x%p, size:%"MLFu64")\n", inode, fe->i_size); 222 223 sb = inode->i_sb; 224 osb = OCFS2_SB(sb); 225 226 /* this means that read_inode cannot create a superblock inode 227 * today. change if needed. */ 228 if (!OCFS2_IS_VALID_DINODE(fe) || 229 !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) { 230 mlog(ML_ERROR, "Invalid dinode: i_ino=%lu, i_blkno=%"MLFu64", " 231 "signature = %.*s, flags = 0x%x\n", 232 inode->i_ino, le64_to_cpu(fe->i_blkno), 7, 233 fe->i_signature, le32_to_cpu(fe->i_flags)); 234 goto bail; 235 } 236 237 if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) { 238 mlog(ML_ERROR, "file entry generation does not match " 239 "superblock! osb->fs_generation=%x, " 240 "fe->i_fs_generation=%x\n", 241 osb->fs_generation, le32_to_cpu(fe->i_fs_generation)); 242 goto bail; 243 } 244 245 inode->i_version = 1; 246 inode->i_generation = le32_to_cpu(fe->i_generation); 247 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 248 inode->i_mode = le16_to_cpu(fe->i_mode); 249 inode->i_uid = le32_to_cpu(fe->i_uid); 250 inode->i_gid = le32_to_cpu(fe->i_gid); 251 inode->i_blksize = (u32)osb->s_clustersize; 252 253 /* Fast symlinks will have i_size but no allocated clusters. */ 254 if (S_ISLNK(inode->i_mode) && !fe->i_clusters) 255 inode->i_blocks = 0; 256 else 257 inode->i_blocks = 258 ocfs2_align_bytes_to_sectors(le64_to_cpu(fe->i_size)); 259 inode->i_mapping->a_ops = &ocfs2_aops; 260 inode->i_flags |= S_NOATIME; 261 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 262 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 263 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 264 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 265 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 266 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 267 268 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno)) 269 mlog(ML_ERROR, 270 "ip_blkno %"MLFu64" != i_blkno %"MLFu64"!\n", 271 OCFS2_I(inode)->ip_blkno, fe->i_blkno); 272 273 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 274 OCFS2_I(inode)->ip_orphaned_slot = OCFS2_INVALID_SLOT; 275 276 if (create_ino) 277 inode->i_ino = ino_from_blkno(inode->i_sb, 278 le64_to_cpu(fe->i_blkno)); 279 280 mlog(0, "blkno = %"MLFu64", ino = %lu, create_ino = %s\n", 281 fe->i_blkno, inode->i_ino, create_ino ? "true" : "false"); 282 283 inode->i_nlink = le16_to_cpu(fe->i_links_count); 284 285 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) { 286 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 287 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino); 288 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) { 289 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP; 290 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) { 291 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino); 292 /* we can't actually hit this as read_inode can't 293 * handle superblocks today ;-) */ 294 BUG(); 295 } 296 297 switch (inode->i_mode & S_IFMT) { 298 case S_IFREG: 299 inode->i_fop = &ocfs2_fops; 300 inode->i_op = &ocfs2_file_iops; 301 i_size_write(inode, le64_to_cpu(fe->i_size)); 302 break; 303 case S_IFDIR: 304 inode->i_op = &ocfs2_dir_iops; 305 inode->i_fop = &ocfs2_dops; 306 i_size_write(inode, le64_to_cpu(fe->i_size)); 307 break; 308 case S_IFLNK: 309 if (ocfs2_inode_is_fast_symlink(inode)) 310 inode->i_op = &ocfs2_fast_symlink_inode_operations; 311 else 312 inode->i_op = &ocfs2_symlink_inode_operations; 313 i_size_write(inode, le64_to_cpu(fe->i_size)); 314 break; 315 default: 316 inode->i_op = &ocfs2_special_file_iops; 317 init_special_inode(inode, inode->i_mode, 318 inode->i_rdev); 319 break; 320 } 321 322 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres, 323 OCFS2_LOCK_TYPE_RW, inode); 324 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres, 325 OCFS2_LOCK_TYPE_META, inode); 326 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres, 327 OCFS2_LOCK_TYPE_DATA, inode); 328 329 status = 0; 330 bail: 331 mlog_exit(status); 332 return status; 333 } 334 335 static int ocfs2_read_locked_inode(struct inode *inode, 336 struct ocfs2_find_inode_args *args) 337 { 338 struct super_block *sb; 339 struct ocfs2_super *osb; 340 struct ocfs2_dinode *fe; 341 struct buffer_head *bh = NULL; 342 int status; 343 int sysfile = 0; 344 345 mlog_entry("(0x%p, 0x%p)\n", inode, args); 346 347 status = -EINVAL; 348 if (inode == NULL || inode->i_sb == NULL) { 349 mlog(ML_ERROR, "bad inode\n"); 350 goto bail; 351 } 352 sb = inode->i_sb; 353 osb = OCFS2_SB(sb); 354 355 if (!args) { 356 mlog(ML_ERROR, "bad inode args\n"); 357 make_bad_inode(inode); 358 goto bail; 359 } 360 361 /* Read the FE off disk. This is safe because the kernel only 362 * does one read_inode2 for a new inode, and if it doesn't 363 * exist yet then nobody can be working on it! */ 364 status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0, NULL); 365 if (status < 0) { 366 mlog_errno(status); 367 make_bad_inode(inode); 368 goto bail; 369 } 370 371 fe = (struct ocfs2_dinode *) bh->b_data; 372 if (!OCFS2_IS_VALID_DINODE(fe)) { 373 mlog(ML_ERROR, "Invalid dinode #%"MLFu64": signature = %.*s\n", 374 fe->i_blkno, 7, fe->i_signature); 375 make_bad_inode(inode); 376 goto bail; 377 } 378 379 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) 380 sysfile = 1; 381 382 if (S_ISCHR(le16_to_cpu(fe->i_mode)) || 383 S_ISBLK(le16_to_cpu(fe->i_mode))) 384 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); 385 386 status = -EINVAL; 387 if (ocfs2_populate_inode(inode, fe, 0) < 0) { 388 mlog(ML_ERROR, "populate inode failed! i_blkno=%"MLFu64", " 389 "i_ino=%lu\n", fe->i_blkno, inode->i_ino); 390 make_bad_inode(inode); 391 goto bail; 392 } 393 394 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno)); 395 396 if (sysfile) 397 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE; 398 399 status = 0; 400 401 bail: 402 if (args && bh) 403 brelse(bh); 404 405 mlog_exit(status); 406 return status; 407 } 408 409 void ocfs2_sync_blockdev(struct super_block *sb) 410 { 411 sync_blockdev(sb->s_bdev); 412 } 413 414 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, 415 struct inode *inode, 416 struct buffer_head *fe_bh) 417 { 418 int status = 0; 419 struct ocfs2_journal_handle *handle = NULL; 420 struct ocfs2_truncate_context *tc = NULL; 421 struct ocfs2_dinode *fe; 422 423 mlog_entry_void(); 424 425 fe = (struct ocfs2_dinode *) fe_bh->b_data; 426 427 /* zero allocation, zero truncate :) */ 428 if (!fe->i_clusters) 429 goto bail; 430 431 handle = ocfs2_start_trans(osb, handle, OCFS2_INODE_UPDATE_CREDITS); 432 if (IS_ERR(handle)) { 433 status = PTR_ERR(handle); 434 handle = NULL; 435 mlog_errno(status); 436 goto bail; 437 } 438 439 status = ocfs2_set_inode_size(handle, inode, fe_bh, 0ULL); 440 if (status < 0) { 441 mlog_errno(status); 442 goto bail; 443 } 444 445 ocfs2_commit_trans(handle); 446 handle = NULL; 447 448 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc); 449 if (status < 0) { 450 mlog_errno(status); 451 goto bail; 452 } 453 454 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc); 455 if (status < 0) { 456 mlog_errno(status); 457 goto bail; 458 } 459 bail: 460 if (handle) 461 ocfs2_commit_trans(handle); 462 463 mlog_exit(status); 464 return status; 465 } 466 467 static int ocfs2_remove_inode(struct inode *inode, 468 struct buffer_head *di_bh, 469 struct inode *orphan_dir_inode, 470 struct buffer_head *orphan_dir_bh) 471 { 472 int status; 473 struct inode *inode_alloc_inode = NULL; 474 struct buffer_head *inode_alloc_bh = NULL; 475 struct ocfs2_journal_handle *handle; 476 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 477 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 478 479 inode_alloc_inode = 480 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, 481 le16_to_cpu(di->i_suballoc_slot)); 482 if (!inode_alloc_inode) { 483 status = -EEXIST; 484 mlog_errno(status); 485 goto bail; 486 } 487 488 mutex_lock(&inode_alloc_inode->i_mutex); 489 status = ocfs2_meta_lock(inode_alloc_inode, NULL, &inode_alloc_bh, 1); 490 if (status < 0) { 491 mutex_unlock(&inode_alloc_inode->i_mutex); 492 493 mlog_errno(status); 494 goto bail; 495 } 496 497 handle = ocfs2_start_trans(osb, NULL, OCFS2_DELETE_INODE_CREDITS); 498 if (IS_ERR(handle)) { 499 status = PTR_ERR(handle); 500 mlog_errno(status); 501 goto bail_unlock; 502 } 503 504 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 505 orphan_dir_bh); 506 if (status < 0) { 507 mlog_errno(status); 508 goto bail_commit; 509 } 510 511 /* set the inodes dtime */ 512 status = ocfs2_journal_access(handle, inode, di_bh, 513 OCFS2_JOURNAL_ACCESS_WRITE); 514 if (status < 0) { 515 mlog_errno(status); 516 goto bail_commit; 517 } 518 519 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec); 520 le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL)); 521 522 status = ocfs2_journal_dirty(handle, di_bh); 523 if (status < 0) { 524 mlog_errno(status); 525 goto bail_commit; 526 } 527 528 ocfs2_remove_from_cache(inode, di_bh); 529 530 status = ocfs2_free_dinode(handle, inode_alloc_inode, 531 inode_alloc_bh, di); 532 if (status < 0) 533 mlog_errno(status); 534 535 bail_commit: 536 ocfs2_commit_trans(handle); 537 bail_unlock: 538 ocfs2_meta_unlock(inode_alloc_inode, 1); 539 mutex_unlock(&inode_alloc_inode->i_mutex); 540 brelse(inode_alloc_bh); 541 bail: 542 iput(inode_alloc_inode); 543 544 return status; 545 } 546 547 static int ocfs2_wipe_inode(struct inode *inode, 548 struct buffer_head *di_bh) 549 { 550 int status, orphaned_slot; 551 struct inode *orphan_dir_inode = NULL; 552 struct buffer_head *orphan_dir_bh = NULL; 553 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 554 555 /* We've already voted on this so it should be readonly - no 556 * spinlock needed. */ 557 orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot; 558 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 559 ORPHAN_DIR_SYSTEM_INODE, 560 orphaned_slot); 561 if (!orphan_dir_inode) { 562 status = -EEXIST; 563 mlog_errno(status); 564 goto bail; 565 } 566 567 /* Lock the orphan dir. The lock will be held for the entire 568 * delete_inode operation. We do this now to avoid races with 569 * recovery completion on other nodes. */ 570 mutex_lock(&orphan_dir_inode->i_mutex); 571 status = ocfs2_meta_lock(orphan_dir_inode, NULL, &orphan_dir_bh, 1); 572 if (status < 0) { 573 mutex_unlock(&orphan_dir_inode->i_mutex); 574 575 mlog_errno(status); 576 goto bail; 577 } 578 579 /* we do this while holding the orphan dir lock because we 580 * don't want recovery being run from another node to vote for 581 * an inode delete on us -- this will result in two nodes 582 * truncating the same file! */ 583 status = ocfs2_truncate_for_delete(osb, inode, di_bh); 584 if (status < 0) { 585 mlog_errno(status); 586 goto bail_unlock_dir; 587 } 588 589 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode, 590 orphan_dir_bh); 591 if (status < 0) 592 mlog_errno(status); 593 594 bail_unlock_dir: 595 ocfs2_meta_unlock(orphan_dir_inode, 1); 596 mutex_unlock(&orphan_dir_inode->i_mutex); 597 brelse(orphan_dir_bh); 598 bail: 599 iput(orphan_dir_inode); 600 601 return status; 602 } 603 604 /* There is a series of simple checks that should be done before a 605 * vote is even considered. Encapsulate those in this function. */ 606 static int ocfs2_inode_is_valid_to_delete(struct inode *inode) 607 { 608 int ret = 0; 609 struct ocfs2_inode_info *oi = OCFS2_I(inode); 610 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 611 612 /* We shouldn't be getting here for the root directory 613 * inode.. */ 614 if (inode == osb->root_inode) { 615 mlog(ML_ERROR, "Skipping delete of root inode.\n"); 616 goto bail; 617 } 618 619 /* If we're coming from process_vote we can't go into our own 620 * voting [hello, deadlock city!], so unforuntately we just 621 * have to skip deleting this guy. That's OK though because 622 * the node who's doing the actual deleting should handle it 623 * anyway. */ 624 if (current == osb->vote_task) { 625 mlog(0, "Skipping delete of %lu because we're currently " 626 "in process_vote\n", inode->i_ino); 627 goto bail; 628 } 629 630 spin_lock(&oi->ip_lock); 631 /* OCFS2 *never* deletes system files. This should technically 632 * never get here as system file inodes should always have a 633 * positive link count. */ 634 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) { 635 mlog(ML_ERROR, "Skipping delete of system file %"MLFu64".\n", 636 oi->ip_blkno); 637 goto bail_unlock; 638 } 639 640 /* If we have voted "yes" on the wipe of this inode for 641 * another node, it will be marked here so we can safely skip 642 * it. Recovery will cleanup any inodes we might inadvertantly 643 * skip here. */ 644 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) { 645 mlog(0, "Skipping delete of %lu because another node " 646 "has done this for us.\n", inode->i_ino); 647 goto bail_unlock; 648 } 649 650 ret = 1; 651 bail_unlock: 652 spin_unlock(&oi->ip_lock); 653 bail: 654 return ret; 655 } 656 657 /* Query the cluster to determine whether we should wipe an inode from 658 * disk or not. 659 * 660 * Requires the inode to have the cluster lock. */ 661 static int ocfs2_query_inode_wipe(struct inode *inode, 662 struct buffer_head *di_bh, 663 int *wipe) 664 { 665 int status = 0; 666 struct ocfs2_inode_info *oi = OCFS2_I(inode); 667 struct ocfs2_dinode *di; 668 669 *wipe = 0; 670 671 /* While we were waiting for the cluster lock in 672 * ocfs2_delete_inode, another node might have asked to delete 673 * the inode. Recheck our flags to catch this. */ 674 if (!ocfs2_inode_is_valid_to_delete(inode)) { 675 mlog(0, "Skipping delete of %"MLFu64" because flags changed\n", 676 oi->ip_blkno); 677 goto bail; 678 } 679 680 /* Now that we have an up to date inode, we can double check 681 * the link count. */ 682 if (inode->i_nlink) { 683 mlog(0, "Skipping delete of %"MLFu64" because nlink = %u\n", 684 oi->ip_blkno, inode->i_nlink); 685 goto bail; 686 } 687 688 /* Do some basic inode verification... */ 689 di = (struct ocfs2_dinode *) di_bh->b_data; 690 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) { 691 /* for lack of a better error? */ 692 status = -EEXIST; 693 mlog(ML_ERROR, 694 "Inode %"MLFu64" (on-disk %"MLFu64") not orphaned! " 695 "Disk flags 0x%x, inode flags 0x%x\n", 696 oi->ip_blkno, di->i_blkno, di->i_flags, oi->ip_flags); 697 goto bail; 698 } 699 700 /* has someone already deleted us?! baaad... */ 701 if (di->i_dtime) { 702 status = -EEXIST; 703 mlog_errno(status); 704 goto bail; 705 } 706 707 status = ocfs2_request_delete_vote(inode); 708 /* -EBUSY means that other nodes are still using the 709 * inode. We're done here though, so avoid doing anything on 710 * disk and let them worry about deleting it. */ 711 if (status == -EBUSY) { 712 status = 0; 713 mlog(0, "Skipping delete of %"MLFu64" because it is in use on" 714 "other nodes\n", oi->ip_blkno); 715 goto bail; 716 } 717 if (status < 0) { 718 mlog_errno(status); 719 goto bail; 720 } 721 722 spin_lock(&oi->ip_lock); 723 if (oi->ip_orphaned_slot == OCFS2_INVALID_SLOT) { 724 /* Nobody knew which slot this inode was orphaned 725 * into. This may happen during node death and 726 * recovery knows how to clean it up so we can safely 727 * ignore this inode for now on. */ 728 mlog(0, "Nobody knew where inode %"MLFu64" was orphaned!\n", 729 oi->ip_blkno); 730 } else { 731 *wipe = 1; 732 733 mlog(0, "Inode %"MLFu64" is ok to wipe from orphan dir %d\n", 734 oi->ip_blkno, oi->ip_orphaned_slot); 735 } 736 spin_unlock(&oi->ip_lock); 737 738 bail: 739 return status; 740 } 741 742 /* Support function for ocfs2_delete_inode. Will help us keep the 743 * inode data in a consistent state for clear_inode. Always truncates 744 * pages, optionally sync's them first. */ 745 static void ocfs2_cleanup_delete_inode(struct inode *inode, 746 int sync_data) 747 { 748 mlog(0, "Cleanup inode %"MLFu64", sync = %d\n", 749 OCFS2_I(inode)->ip_blkno, sync_data); 750 if (sync_data) 751 write_inode_now(inode, 1); 752 truncate_inode_pages(&inode->i_data, 0); 753 } 754 755 void ocfs2_delete_inode(struct inode *inode) 756 { 757 int wipe, status; 758 sigset_t blocked, oldset; 759 struct buffer_head *di_bh = NULL; 760 761 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); 762 763 if (is_bad_inode(inode)) { 764 mlog(0, "Skipping delete of bad inode\n"); 765 goto bail; 766 } 767 768 if (!ocfs2_inode_is_valid_to_delete(inode)) { 769 /* It's probably not necessary to truncate_inode_pages 770 * here but we do it for safety anyway (it will most 771 * likely be a no-op anyway) */ 772 ocfs2_cleanup_delete_inode(inode, 0); 773 goto bail; 774 } 775 776 /* We want to block signals in delete_inode as the lock and 777 * messaging paths may return us -ERESTARTSYS. Which would 778 * cause us to exit early, resulting in inodes being orphaned 779 * forever. */ 780 sigfillset(&blocked); 781 status = sigprocmask(SIG_BLOCK, &blocked, &oldset); 782 if (status < 0) { 783 mlog_errno(status); 784 ocfs2_cleanup_delete_inode(inode, 1); 785 goto bail; 786 } 787 788 /* Lock down the inode. This gives us an up to date view of 789 * it's metadata (for verification), and allows us to 790 * serialize delete_inode votes. 791 * 792 * Even though we might be doing a truncate, we don't take the 793 * allocation lock here as it won't be needed - nobody will 794 * have the file open. 795 */ 796 status = ocfs2_meta_lock(inode, NULL, &di_bh, 1); 797 if (status < 0) { 798 if (status != -ENOENT) 799 mlog_errno(status); 800 ocfs2_cleanup_delete_inode(inode, 0); 801 goto bail_unblock; 802 } 803 804 /* Query the cluster. This will be the final decision made 805 * before we go ahead and wipe the inode. */ 806 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe); 807 if (!wipe || status < 0) { 808 /* Error and inode busy vote both mean we won't be 809 * removing the inode, so they take almost the same 810 * path. */ 811 if (status < 0) 812 mlog_errno(status); 813 814 /* Someone in the cluster has voted to not wipe this 815 * inode, or it was never completely orphaned. Write 816 * out the pages and exit now. */ 817 ocfs2_cleanup_delete_inode(inode, 1); 818 goto bail_unlock_inode; 819 } 820 821 ocfs2_cleanup_delete_inode(inode, 0); 822 823 status = ocfs2_wipe_inode(inode, di_bh); 824 if (status < 0) { 825 mlog_errno(status); 826 goto bail_unlock_inode; 827 } 828 829 /* Mark the inode as successfully deleted. This is important 830 * for ocfs2_clear_inode as it will check this flag and skip 831 * any checkpointing work */ 832 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED; 833 834 bail_unlock_inode: 835 ocfs2_meta_unlock(inode, 1); 836 brelse(di_bh); 837 bail_unblock: 838 status = sigprocmask(SIG_SETMASK, &oldset, NULL); 839 if (status < 0) 840 mlog_errno(status); 841 bail: 842 clear_inode(inode); 843 mlog_exit_void(); 844 } 845 846 void ocfs2_clear_inode(struct inode *inode) 847 { 848 int status; 849 struct ocfs2_inode_info *oi = OCFS2_I(inode); 850 851 mlog_entry_void(); 852 853 if (!inode) 854 goto bail; 855 856 mlog(0, "Clearing inode: %"MLFu64", nlink = %u\n", 857 OCFS2_I(inode)->ip_blkno, inode->i_nlink); 858 859 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL, 860 "Inode=%lu\n", inode->i_ino); 861 862 /* Do these before all the other work so that we don't bounce 863 * the vote thread while waiting to destroy the locks. */ 864 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres); 865 ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres); 866 ocfs2_mark_lockres_freeing(&oi->ip_data_lockres); 867 868 /* We very well may get a clear_inode before all an inodes 869 * metadata has hit disk. Of course, we can't drop any cluster 870 * locks until the journal has finished with it. The only 871 * exception here are successfully wiped inodes - their 872 * metadata can now be considered to be part of the system 873 * inodes from which it came. */ 874 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED)) 875 ocfs2_checkpoint_inode(inode); 876 877 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers), 878 "Clear inode of %"MLFu64", inode has io markers\n", 879 oi->ip_blkno); 880 881 ocfs2_extent_map_drop(inode, 0); 882 ocfs2_extent_map_init(inode); 883 884 status = ocfs2_drop_inode_locks(inode); 885 if (status < 0) 886 mlog_errno(status); 887 888 ocfs2_lock_res_free(&oi->ip_rw_lockres); 889 ocfs2_lock_res_free(&oi->ip_meta_lockres); 890 ocfs2_lock_res_free(&oi->ip_data_lockres); 891 892 ocfs2_metadata_cache_purge(inode); 893 894 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached, 895 "Clear inode of %"MLFu64", inode has %u cache items\n", 896 oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached); 897 898 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE), 899 "Clear inode of %"MLFu64", inode has a bad flag\n", 900 oi->ip_blkno); 901 902 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock), 903 "Clear inode of %"MLFu64", inode is locked\n", 904 oi->ip_blkno); 905 906 mlog_bug_on_msg(down_trylock(&oi->ip_io_sem), 907 "Clear inode of %"MLFu64", io_sem is locked\n", 908 oi->ip_blkno); 909 up(&oi->ip_io_sem); 910 911 /* 912 * down_trylock() returns 0, down_write_trylock() returns 1 913 * kernel 1, world 0 914 */ 915 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem), 916 "Clear inode of %"MLFu64", alloc_sem is locked\n", 917 oi->ip_blkno); 918 up_write(&oi->ip_alloc_sem); 919 920 mlog_bug_on_msg(oi->ip_open_count, 921 "Clear inode of %"MLFu64" has open count %d\n", 922 oi->ip_blkno, oi->ip_open_count); 923 mlog_bug_on_msg(!list_empty(&oi->ip_handle_list), 924 "Clear inode of %"MLFu64" has non empty handle list\n", 925 oi->ip_blkno); 926 mlog_bug_on_msg(oi->ip_handle, 927 "Clear inode of %"MLFu64" has non empty handle pointer\n", 928 oi->ip_blkno); 929 930 /* Clear all other flags. */ 931 oi->ip_flags = OCFS2_INODE_CACHE_INLINE; 932 oi->ip_created_trans = 0; 933 oi->ip_last_trans = 0; 934 oi->ip_dir_start_lookup = 0; 935 oi->ip_blkno = 0ULL; 936 937 bail: 938 mlog_exit_void(); 939 } 940 941 /* Called under inode_lock, with no more references on the 942 * struct inode, so it's safe here to check the flags field 943 * and to manipulate i_nlink without any other locks. */ 944 void ocfs2_drop_inode(struct inode *inode) 945 { 946 struct ocfs2_inode_info *oi = OCFS2_I(inode); 947 948 mlog_entry_void(); 949 950 mlog(0, "Drop inode %"MLFu64", nlink = %u, ip_flags = 0x%x\n", 951 oi->ip_blkno, inode->i_nlink, oi->ip_flags); 952 953 /* Testing ip_orphaned_slot here wouldn't work because we may 954 * not have gotten a delete_inode vote from any other nodes 955 * yet. */ 956 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) { 957 mlog(0, "Inode was orphaned on another node, clearing nlink.\n"); 958 inode->i_nlink = 0; 959 } 960 961 generic_drop_inode(inode); 962 963 mlog_exit_void(); 964 } 965 966 /* 967 * TODO: this should probably be merged into ocfs2_get_block 968 * 969 * However, you now need to pay attention to the cont_prepare_write() 970 * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much 971 * expects never to extend). 972 */ 973 struct buffer_head *ocfs2_bread(struct inode *inode, 974 int block, int *err, int reada) 975 { 976 struct buffer_head *bh = NULL; 977 int tmperr; 978 u64 p_blkno; 979 int readflags = OCFS2_BH_CACHED; 980 981 #if 0 982 /* only turn this on if we know we can deal with read_block 983 * returning nothing */ 984 if (reada) 985 readflags |= OCFS2_BH_READAHEAD; 986 #endif 987 988 if (((u64)block << inode->i_sb->s_blocksize_bits) >= 989 i_size_read(inode)) { 990 BUG_ON(!reada); 991 return NULL; 992 } 993 994 tmperr = ocfs2_extent_map_get_blocks(inode, block, 1, 995 &p_blkno, NULL); 996 if (tmperr < 0) { 997 mlog_errno(tmperr); 998 goto fail; 999 } 1000 1001 tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh, 1002 readflags, inode); 1003 if (tmperr < 0) 1004 goto fail; 1005 1006 tmperr = 0; 1007 1008 *err = 0; 1009 return bh; 1010 1011 fail: 1012 if (bh) { 1013 brelse(bh); 1014 bh = NULL; 1015 } 1016 *err = -EIO; 1017 return NULL; 1018 } 1019 1020 /* 1021 * This is called from our getattr. 1022 */ 1023 int ocfs2_inode_revalidate(struct dentry *dentry) 1024 { 1025 struct inode *inode = dentry->d_inode; 1026 int status = 0; 1027 1028 mlog_entry("(inode = 0x%p, ino = %"MLFu64")\n", inode, 1029 inode ? OCFS2_I(inode)->ip_blkno : 0ULL); 1030 1031 if (!inode) { 1032 mlog(0, "eep, no inode!\n"); 1033 status = -ENOENT; 1034 goto bail; 1035 } 1036 1037 spin_lock(&OCFS2_I(inode)->ip_lock); 1038 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { 1039 spin_unlock(&OCFS2_I(inode)->ip_lock); 1040 mlog(0, "inode deleted!\n"); 1041 status = -ENOENT; 1042 goto bail; 1043 } 1044 spin_unlock(&OCFS2_I(inode)->ip_lock); 1045 1046 /* Let ocfs2_meta_lock do the work of updating our struct 1047 * inode for us. */ 1048 status = ocfs2_meta_lock(inode, NULL, NULL, 0); 1049 if (status < 0) { 1050 if (status != -ENOENT) 1051 mlog_errno(status); 1052 goto bail; 1053 } 1054 ocfs2_meta_unlock(inode, 0); 1055 bail: 1056 mlog_exit(status); 1057 1058 return status; 1059 } 1060 1061 /* 1062 * Updates a disk inode from a 1063 * struct inode. 1064 * Only takes ip_lock. 1065 */ 1066 int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle, 1067 struct inode *inode, 1068 struct buffer_head *bh) 1069 { 1070 int status; 1071 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; 1072 1073 mlog_entry("(inode %"MLFu64")\n", OCFS2_I(inode)->ip_blkno); 1074 1075 status = ocfs2_journal_access(handle, inode, bh, 1076 OCFS2_JOURNAL_ACCESS_WRITE); 1077 if (status < 0) { 1078 mlog_errno(status); 1079 goto leave; 1080 } 1081 1082 spin_lock(&OCFS2_I(inode)->ip_lock); 1083 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters); 1084 spin_unlock(&OCFS2_I(inode)->ip_lock); 1085 1086 fe->i_size = cpu_to_le64(i_size_read(inode)); 1087 fe->i_links_count = cpu_to_le16(inode->i_nlink); 1088 fe->i_uid = cpu_to_le32(inode->i_uid); 1089 fe->i_gid = cpu_to_le32(inode->i_gid); 1090 fe->i_mode = cpu_to_le16(inode->i_mode); 1091 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 1092 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 1093 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 1094 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 1095 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 1096 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 1097 1098 status = ocfs2_journal_dirty(handle, bh); 1099 if (status < 0) 1100 mlog_errno(status); 1101 1102 status = 0; 1103 leave: 1104 1105 mlog_exit(status); 1106 return status; 1107 } 1108 1109 /* 1110 * 1111 * Updates a struct inode from a disk inode. 1112 * does no i/o, only takes ip_lock. 1113 */ 1114 void ocfs2_refresh_inode(struct inode *inode, 1115 struct ocfs2_dinode *fe) 1116 { 1117 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 1118 1119 spin_lock(&OCFS2_I(inode)->ip_lock); 1120 1121 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 1122 i_size_write(inode, le64_to_cpu(fe->i_size)); 1123 inode->i_nlink = le16_to_cpu(fe->i_links_count); 1124 inode->i_uid = le32_to_cpu(fe->i_uid); 1125 inode->i_gid = le32_to_cpu(fe->i_gid); 1126 inode->i_mode = le16_to_cpu(fe->i_mode); 1127 inode->i_blksize = (u32) osb->s_clustersize; 1128 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0) 1129 inode->i_blocks = 0; 1130 else 1131 inode->i_blocks = ocfs2_align_bytes_to_sectors(i_size_read(inode)); 1132 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); 1133 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); 1134 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); 1135 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec); 1136 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime); 1137 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec); 1138 1139 spin_unlock(&OCFS2_I(inode)->ip_lock); 1140 } 1141