1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * journal.c 5 * 6 * Defines functions of journalling api 7 * 8 * Copyright (C) 2003, 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/kthread.h> 31 32 #define MLOG_MASK_PREFIX ML_JOURNAL 33 #include <cluster/masklog.h> 34 35 #include "ocfs2.h" 36 37 #include "alloc.h" 38 #include "dlmglue.h" 39 #include "extent_map.h" 40 #include "heartbeat.h" 41 #include "inode.h" 42 #include "journal.h" 43 #include "localalloc.h" 44 #include "namei.h" 45 #include "slot_map.h" 46 #include "super.h" 47 #include "vote.h" 48 #include "sysfile.h" 49 50 #include "buffer_head_io.h" 51 52 DEFINE_SPINLOCK(trans_inc_lock); 53 54 static int ocfs2_force_read_journal(struct inode *inode); 55 static int ocfs2_recover_node(struct ocfs2_super *osb, 56 int node_num); 57 static int __ocfs2_recovery_thread(void *arg); 58 static int ocfs2_commit_cache(struct ocfs2_super *osb); 59 static int ocfs2_wait_on_mount(struct ocfs2_super *osb); 60 static void ocfs2_handle_cleanup_locks(struct ocfs2_journal *journal, 61 struct ocfs2_journal_handle *handle); 62 static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle *handle); 63 static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, 64 int dirty); 65 static int ocfs2_trylock_journal(struct ocfs2_super *osb, 66 int slot_num); 67 static int ocfs2_recover_orphans(struct ocfs2_super *osb, 68 int slot); 69 static int ocfs2_commit_thread(void *arg); 70 71 static int ocfs2_commit_cache(struct ocfs2_super *osb) 72 { 73 int status = 0; 74 unsigned int flushed; 75 unsigned long old_id; 76 struct ocfs2_journal *journal = NULL; 77 78 mlog_entry_void(); 79 80 journal = osb->journal; 81 82 /* Flush all pending commits and checkpoint the journal. */ 83 down_write(&journal->j_trans_barrier); 84 85 if (atomic_read(&journal->j_num_trans) == 0) { 86 up_write(&journal->j_trans_barrier); 87 mlog(0, "No transactions for me to flush!\n"); 88 goto finally; 89 } 90 91 journal_lock_updates(journal->j_journal); 92 status = journal_flush(journal->j_journal); 93 journal_unlock_updates(journal->j_journal); 94 if (status < 0) { 95 up_write(&journal->j_trans_barrier); 96 mlog_errno(status); 97 goto finally; 98 } 99 100 old_id = ocfs2_inc_trans_id(journal); 101 102 flushed = atomic_read(&journal->j_num_trans); 103 atomic_set(&journal->j_num_trans, 0); 104 up_write(&journal->j_trans_barrier); 105 106 mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n", 107 journal->j_trans_id, flushed); 108 109 ocfs2_kick_vote_thread(osb); 110 wake_up(&journal->j_checkpointed); 111 finally: 112 mlog_exit(status); 113 return status; 114 } 115 116 struct ocfs2_journal_handle *ocfs2_alloc_handle(struct ocfs2_super *osb) 117 { 118 struct ocfs2_journal_handle *retval = NULL; 119 120 retval = kcalloc(1, sizeof(*retval), GFP_NOFS); 121 if (!retval) { 122 mlog(ML_ERROR, "Failed to allocate memory for journal " 123 "handle!\n"); 124 return NULL; 125 } 126 127 retval->max_buffs = 0; 128 retval->num_locks = 0; 129 retval->k_handle = NULL; 130 131 INIT_LIST_HEAD(&retval->locks); 132 INIT_LIST_HEAD(&retval->inode_list); 133 retval->journal = osb->journal; 134 135 return retval; 136 } 137 138 /* pass it NULL and it will allocate a new handle object for you. If 139 * you pass it a handle however, it may still return error, in which 140 * case it has free'd the passed handle for you. */ 141 struct ocfs2_journal_handle *ocfs2_start_trans(struct ocfs2_super *osb, 142 struct ocfs2_journal_handle *handle, 143 int max_buffs) 144 { 145 int ret; 146 journal_t *journal = osb->journal->j_journal; 147 148 mlog_entry("(max_buffs = %d)\n", max_buffs); 149 150 BUG_ON(!osb || !osb->journal->j_journal); 151 152 if (ocfs2_is_hard_readonly(osb)) { 153 ret = -EROFS; 154 goto done_free; 155 } 156 157 BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE); 158 BUG_ON(max_buffs <= 0); 159 160 /* JBD might support this, but our journalling code doesn't yet. */ 161 if (journal_current_handle()) { 162 mlog(ML_ERROR, "Recursive transaction attempted!\n"); 163 BUG(); 164 } 165 166 if (!handle) 167 handle = ocfs2_alloc_handle(osb); 168 if (!handle) { 169 ret = -ENOMEM; 170 mlog(ML_ERROR, "Failed to allocate memory for journal " 171 "handle!\n"); 172 goto done_free; 173 } 174 175 handle->max_buffs = max_buffs; 176 177 down_read(&osb->journal->j_trans_barrier); 178 179 /* actually start the transaction now */ 180 handle->k_handle = journal_start(journal, max_buffs); 181 if (IS_ERR(handle->k_handle)) { 182 up_read(&osb->journal->j_trans_barrier); 183 184 ret = PTR_ERR(handle->k_handle); 185 handle->k_handle = NULL; 186 mlog_errno(ret); 187 188 if (is_journal_aborted(journal)) { 189 ocfs2_abort(osb->sb, "Detected aborted journal"); 190 ret = -EROFS; 191 } 192 goto done_free; 193 } 194 195 atomic_inc(&(osb->journal->j_num_trans)); 196 handle->flags |= OCFS2_HANDLE_STARTED; 197 198 mlog_exit_ptr(handle); 199 return handle; 200 201 done_free: 202 if (handle) 203 ocfs2_commit_unstarted_handle(handle); /* will kfree handle */ 204 205 mlog_exit(ret); 206 return ERR_PTR(ret); 207 } 208 209 void ocfs2_handle_add_inode(struct ocfs2_journal_handle *handle, 210 struct inode *inode) 211 { 212 BUG_ON(!handle); 213 BUG_ON(!inode); 214 215 atomic_inc(&inode->i_count); 216 217 /* we're obviously changing it... */ 218 mutex_lock(&inode->i_mutex); 219 220 /* sanity check */ 221 BUG_ON(OCFS2_I(inode)->ip_handle); 222 BUG_ON(!list_empty(&OCFS2_I(inode)->ip_handle_list)); 223 224 OCFS2_I(inode)->ip_handle = handle; 225 list_move_tail(&(OCFS2_I(inode)->ip_handle_list), &(handle->inode_list)); 226 } 227 228 static void ocfs2_handle_unlock_inodes(struct ocfs2_journal_handle *handle) 229 { 230 struct list_head *p, *n; 231 struct inode *inode; 232 struct ocfs2_inode_info *oi; 233 234 list_for_each_safe(p, n, &handle->inode_list) { 235 oi = list_entry(p, struct ocfs2_inode_info, 236 ip_handle_list); 237 inode = &oi->vfs_inode; 238 239 OCFS2_I(inode)->ip_handle = NULL; 240 list_del_init(&OCFS2_I(inode)->ip_handle_list); 241 242 mutex_unlock(&inode->i_mutex); 243 iput(inode); 244 } 245 } 246 247 /* This is trivial so we do it out of the main commit 248 * paths. Beware, it can be called from start_trans too! */ 249 static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle *handle) 250 { 251 mlog_entry_void(); 252 253 BUG_ON(handle->flags & OCFS2_HANDLE_STARTED); 254 255 ocfs2_handle_unlock_inodes(handle); 256 /* You are allowed to add journal locks before the transaction 257 * has started. */ 258 ocfs2_handle_cleanup_locks(handle->journal, handle); 259 260 kfree(handle); 261 262 mlog_exit_void(); 263 } 264 265 void ocfs2_commit_trans(struct ocfs2_journal_handle *handle) 266 { 267 handle_t *jbd_handle; 268 int retval; 269 struct ocfs2_journal *journal = handle->journal; 270 271 mlog_entry_void(); 272 273 BUG_ON(!handle); 274 275 if (!(handle->flags & OCFS2_HANDLE_STARTED)) { 276 ocfs2_commit_unstarted_handle(handle); 277 mlog_exit_void(); 278 return; 279 } 280 281 /* release inode semaphores we took during this transaction */ 282 ocfs2_handle_unlock_inodes(handle); 283 284 /* ocfs2_extend_trans may have had to call journal_restart 285 * which will always commit the transaction, but may return 286 * error for any number of reasons. If this is the case, we 287 * clear k_handle as it's not valid any more. */ 288 if (handle->k_handle) { 289 jbd_handle = handle->k_handle; 290 291 if (handle->flags & OCFS2_HANDLE_SYNC) 292 jbd_handle->h_sync = 1; 293 else 294 jbd_handle->h_sync = 0; 295 296 /* actually stop the transaction. if we've set h_sync, 297 * it'll have been committed when we return */ 298 retval = journal_stop(jbd_handle); 299 if (retval < 0) { 300 mlog_errno(retval); 301 mlog(ML_ERROR, "Could not commit transaction\n"); 302 BUG(); 303 } 304 305 handle->k_handle = NULL; /* it's been free'd in journal_stop */ 306 } 307 308 ocfs2_handle_cleanup_locks(journal, handle); 309 310 up_read(&journal->j_trans_barrier); 311 312 kfree(handle); 313 mlog_exit_void(); 314 } 315 316 /* 317 * 'nblocks' is what you want to add to the current 318 * transaction. extend_trans will either extend the current handle by 319 * nblocks, or commit it and start a new one with nblocks credits. 320 * 321 * WARNING: This will not release any semaphores or disk locks taken 322 * during the transaction, so make sure they were taken *before* 323 * start_trans or we'll have ordering deadlocks. 324 * 325 * WARNING2: Note that we do *not* drop j_trans_barrier here. This is 326 * good because transaction ids haven't yet been recorded on the 327 * cluster locks associated with this handle. 328 */ 329 int ocfs2_extend_trans(struct ocfs2_journal_handle *handle, 330 int nblocks) 331 { 332 int status; 333 334 BUG_ON(!handle); 335 BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); 336 BUG_ON(!nblocks); 337 338 mlog_entry_void(); 339 340 mlog(0, "Trying to extend transaction by %d blocks\n", nblocks); 341 342 status = journal_extend(handle->k_handle, nblocks); 343 if (status < 0) { 344 mlog_errno(status); 345 goto bail; 346 } 347 348 if (status > 0) { 349 mlog(0, "journal_extend failed, trying journal_restart\n"); 350 status = journal_restart(handle->k_handle, nblocks); 351 if (status < 0) { 352 handle->k_handle = NULL; 353 mlog_errno(status); 354 goto bail; 355 } 356 handle->max_buffs = nblocks; 357 } else 358 handle->max_buffs += nblocks; 359 360 status = 0; 361 bail: 362 363 mlog_exit(status); 364 return status; 365 } 366 367 int ocfs2_journal_access(struct ocfs2_journal_handle *handle, 368 struct inode *inode, 369 struct buffer_head *bh, 370 int type) 371 { 372 int status; 373 374 BUG_ON(!inode); 375 BUG_ON(!handle); 376 BUG_ON(!bh); 377 BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); 378 379 mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %zu\n", 380 (unsigned long long)bh->b_blocknr, type, 381 (type == OCFS2_JOURNAL_ACCESS_CREATE) ? 382 "OCFS2_JOURNAL_ACCESS_CREATE" : 383 "OCFS2_JOURNAL_ACCESS_WRITE", 384 bh->b_size); 385 386 /* we can safely remove this assertion after testing. */ 387 if (!buffer_uptodate(bh)) { 388 mlog(ML_ERROR, "giving me a buffer that's not uptodate!\n"); 389 mlog(ML_ERROR, "b_blocknr=%llu\n", 390 (unsigned long long)bh->b_blocknr); 391 BUG(); 392 } 393 394 /* Set the current transaction information on the inode so 395 * that the locking code knows whether it can drop it's locks 396 * on this inode or not. We're protected from the commit 397 * thread updating the current transaction id until 398 * ocfs2_commit_trans() because ocfs2_start_trans() took 399 * j_trans_barrier for us. */ 400 ocfs2_set_inode_lock_trans(OCFS2_SB(inode->i_sb)->journal, inode); 401 402 mutex_lock(&OCFS2_I(inode)->ip_io_mutex); 403 switch (type) { 404 case OCFS2_JOURNAL_ACCESS_CREATE: 405 case OCFS2_JOURNAL_ACCESS_WRITE: 406 status = journal_get_write_access(handle->k_handle, bh); 407 break; 408 409 case OCFS2_JOURNAL_ACCESS_UNDO: 410 status = journal_get_undo_access(handle->k_handle, bh); 411 break; 412 413 default: 414 status = -EINVAL; 415 mlog(ML_ERROR, "Uknown access type!\n"); 416 } 417 mutex_unlock(&OCFS2_I(inode)->ip_io_mutex); 418 419 if (status < 0) 420 mlog(ML_ERROR, "Error %d getting %d access to buffer!\n", 421 status, type); 422 423 mlog_exit(status); 424 return status; 425 } 426 427 int ocfs2_journal_dirty(struct ocfs2_journal_handle *handle, 428 struct buffer_head *bh) 429 { 430 int status; 431 432 BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); 433 434 mlog_entry("(bh->b_blocknr=%llu)\n", 435 (unsigned long long)bh->b_blocknr); 436 437 status = journal_dirty_metadata(handle->k_handle, bh); 438 if (status < 0) 439 mlog(ML_ERROR, "Could not dirty metadata buffer. " 440 "(bh->b_blocknr=%llu)\n", 441 (unsigned long long)bh->b_blocknr); 442 443 mlog_exit(status); 444 return status; 445 } 446 447 int ocfs2_journal_dirty_data(handle_t *handle, 448 struct buffer_head *bh) 449 { 450 int err = journal_dirty_data(handle, bh); 451 if (err) 452 mlog_errno(err); 453 /* TODO: When we can handle it, abort the handle and go RO on 454 * error here. */ 455 456 return err; 457 } 458 459 /* We always assume you're adding a metadata lock at level 'ex' */ 460 int ocfs2_handle_add_lock(struct ocfs2_journal_handle *handle, 461 struct inode *inode) 462 { 463 int status; 464 struct ocfs2_journal_lock *lock; 465 466 BUG_ON(!inode); 467 468 lock = kmem_cache_alloc(ocfs2_lock_cache, GFP_NOFS); 469 if (!lock) { 470 status = -ENOMEM; 471 mlog_errno(-ENOMEM); 472 goto bail; 473 } 474 475 if (!igrab(inode)) 476 BUG(); 477 lock->jl_inode = inode; 478 479 list_add_tail(&(lock->jl_lock_list), &(handle->locks)); 480 handle->num_locks++; 481 482 status = 0; 483 bail: 484 mlog_exit(status); 485 return status; 486 } 487 488 static void ocfs2_handle_cleanup_locks(struct ocfs2_journal *journal, 489 struct ocfs2_journal_handle *handle) 490 { 491 struct list_head *p, *n; 492 struct ocfs2_journal_lock *lock; 493 struct inode *inode; 494 495 list_for_each_safe(p, n, &(handle->locks)) { 496 lock = list_entry(p, struct ocfs2_journal_lock, 497 jl_lock_list); 498 list_del(&lock->jl_lock_list); 499 handle->num_locks--; 500 501 inode = lock->jl_inode; 502 ocfs2_meta_unlock(inode, 1); 503 if (atomic_read(&inode->i_count) == 1) 504 mlog(ML_ERROR, 505 "Inode %llu, I'm doing a last iput for!", 506 (unsigned long long)OCFS2_I(inode)->ip_blkno); 507 iput(inode); 508 kmem_cache_free(ocfs2_lock_cache, lock); 509 } 510 } 511 512 #define OCFS2_DEFAULT_COMMIT_INTERVAL (HZ * 5) 513 514 void ocfs2_set_journal_params(struct ocfs2_super *osb) 515 { 516 journal_t *journal = osb->journal->j_journal; 517 518 spin_lock(&journal->j_state_lock); 519 journal->j_commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL; 520 if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) 521 journal->j_flags |= JFS_BARRIER; 522 else 523 journal->j_flags &= ~JFS_BARRIER; 524 spin_unlock(&journal->j_state_lock); 525 } 526 527 int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty) 528 { 529 int status = -1; 530 struct inode *inode = NULL; /* the journal inode */ 531 journal_t *j_journal = NULL; 532 struct ocfs2_dinode *di = NULL; 533 struct buffer_head *bh = NULL; 534 struct ocfs2_super *osb; 535 int meta_lock = 0; 536 537 mlog_entry_void(); 538 539 BUG_ON(!journal); 540 541 osb = journal->j_osb; 542 543 /* already have the inode for our journal */ 544 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, 545 osb->slot_num); 546 if (inode == NULL) { 547 status = -EACCES; 548 mlog_errno(status); 549 goto done; 550 } 551 if (is_bad_inode(inode)) { 552 mlog(ML_ERROR, "access error (bad inode)\n"); 553 iput(inode); 554 inode = NULL; 555 status = -EACCES; 556 goto done; 557 } 558 559 SET_INODE_JOURNAL(inode); 560 OCFS2_I(inode)->ip_open_count++; 561 562 /* Skip recovery waits here - journal inode metadata never 563 * changes in a live cluster so it can be considered an 564 * exception to the rule. */ 565 status = ocfs2_meta_lock_full(inode, NULL, &bh, 1, 566 OCFS2_META_LOCK_RECOVERY); 567 if (status < 0) { 568 if (status != -ERESTARTSYS) 569 mlog(ML_ERROR, "Could not get lock on journal!\n"); 570 goto done; 571 } 572 573 meta_lock = 1; 574 di = (struct ocfs2_dinode *)bh->b_data; 575 576 if (inode->i_size < OCFS2_MIN_JOURNAL_SIZE) { 577 mlog(ML_ERROR, "Journal file size (%lld) is too small!\n", 578 inode->i_size); 579 status = -EINVAL; 580 goto done; 581 } 582 583 mlog(0, "inode->i_size = %lld\n", inode->i_size); 584 mlog(0, "inode->i_blocks = %llu\n", 585 (unsigned long long)inode->i_blocks); 586 mlog(0, "inode->ip_clusters = %u\n", OCFS2_I(inode)->ip_clusters); 587 588 /* call the kernels journal init function now */ 589 j_journal = journal_init_inode(inode); 590 if (j_journal == NULL) { 591 mlog(ML_ERROR, "Linux journal layer error\n"); 592 status = -EINVAL; 593 goto done; 594 } 595 596 mlog(0, "Returned from journal_init_inode\n"); 597 mlog(0, "j_journal->j_maxlen = %u\n", j_journal->j_maxlen); 598 599 *dirty = (le32_to_cpu(di->id1.journal1.ij_flags) & 600 OCFS2_JOURNAL_DIRTY_FL); 601 602 journal->j_journal = j_journal; 603 journal->j_inode = inode; 604 journal->j_bh = bh; 605 606 ocfs2_set_journal_params(osb); 607 608 journal->j_state = OCFS2_JOURNAL_LOADED; 609 610 status = 0; 611 done: 612 if (status < 0) { 613 if (meta_lock) 614 ocfs2_meta_unlock(inode, 1); 615 if (bh != NULL) 616 brelse(bh); 617 if (inode) { 618 OCFS2_I(inode)->ip_open_count--; 619 iput(inode); 620 } 621 } 622 623 mlog_exit(status); 624 return status; 625 } 626 627 static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, 628 int dirty) 629 { 630 int status; 631 unsigned int flags; 632 struct ocfs2_journal *journal = osb->journal; 633 struct buffer_head *bh = journal->j_bh; 634 struct ocfs2_dinode *fe; 635 636 mlog_entry_void(); 637 638 fe = (struct ocfs2_dinode *)bh->b_data; 639 if (!OCFS2_IS_VALID_DINODE(fe)) { 640 /* This is called from startup/shutdown which will 641 * handle the errors in a specific manner, so no need 642 * to call ocfs2_error() here. */ 643 mlog(ML_ERROR, "Journal dinode %llu has invalid " 644 "signature: %.*s", (unsigned long long)fe->i_blkno, 7, 645 fe->i_signature); 646 status = -EIO; 647 goto out; 648 } 649 650 flags = le32_to_cpu(fe->id1.journal1.ij_flags); 651 if (dirty) 652 flags |= OCFS2_JOURNAL_DIRTY_FL; 653 else 654 flags &= ~OCFS2_JOURNAL_DIRTY_FL; 655 fe->id1.journal1.ij_flags = cpu_to_le32(flags); 656 657 status = ocfs2_write_block(osb, bh, journal->j_inode); 658 if (status < 0) 659 mlog_errno(status); 660 661 out: 662 mlog_exit(status); 663 return status; 664 } 665 666 /* 667 * If the journal has been kmalloc'd it needs to be freed after this 668 * call. 669 */ 670 void ocfs2_journal_shutdown(struct ocfs2_super *osb) 671 { 672 struct ocfs2_journal *journal = NULL; 673 int status = 0; 674 struct inode *inode = NULL; 675 int num_running_trans = 0; 676 677 mlog_entry_void(); 678 679 BUG_ON(!osb); 680 681 journal = osb->journal; 682 if (!journal) 683 goto done; 684 685 inode = journal->j_inode; 686 687 if (journal->j_state != OCFS2_JOURNAL_LOADED) 688 goto done; 689 690 /* need to inc inode use count as journal_destroy will iput. */ 691 if (!igrab(inode)) 692 BUG(); 693 694 num_running_trans = atomic_read(&(osb->journal->j_num_trans)); 695 if (num_running_trans > 0) 696 mlog(0, "Shutting down journal: must wait on %d " 697 "running transactions!\n", 698 num_running_trans); 699 700 /* Do a commit_cache here. It will flush our journal, *and* 701 * release any locks that are still held. 702 * set the SHUTDOWN flag and release the trans lock. 703 * the commit thread will take the trans lock for us below. */ 704 journal->j_state = OCFS2_JOURNAL_IN_SHUTDOWN; 705 706 /* The OCFS2_JOURNAL_IN_SHUTDOWN will signal to commit_cache to not 707 * drop the trans_lock (which we want to hold until we 708 * completely destroy the journal. */ 709 if (osb->commit_task) { 710 /* Wait for the commit thread */ 711 mlog(0, "Waiting for ocfs2commit to exit....\n"); 712 kthread_stop(osb->commit_task); 713 osb->commit_task = NULL; 714 } 715 716 BUG_ON(atomic_read(&(osb->journal->j_num_trans)) != 0); 717 718 status = ocfs2_journal_toggle_dirty(osb, 0); 719 if (status < 0) 720 mlog_errno(status); 721 722 /* Shutdown the kernel journal system */ 723 journal_destroy(journal->j_journal); 724 725 OCFS2_I(inode)->ip_open_count--; 726 727 /* unlock our journal */ 728 ocfs2_meta_unlock(inode, 1); 729 730 brelse(journal->j_bh); 731 journal->j_bh = NULL; 732 733 journal->j_state = OCFS2_JOURNAL_FREE; 734 735 // up_write(&journal->j_trans_barrier); 736 done: 737 if (inode) 738 iput(inode); 739 mlog_exit_void(); 740 } 741 742 static void ocfs2_clear_journal_error(struct super_block *sb, 743 journal_t *journal, 744 int slot) 745 { 746 int olderr; 747 748 olderr = journal_errno(journal); 749 if (olderr) { 750 mlog(ML_ERROR, "File system error %d recorded in " 751 "journal %u.\n", olderr, slot); 752 mlog(ML_ERROR, "File system on device %s needs checking.\n", 753 sb->s_id); 754 755 journal_ack_err(journal); 756 journal_clear_err(journal); 757 } 758 } 759 760 int ocfs2_journal_load(struct ocfs2_journal *journal) 761 { 762 int status = 0; 763 struct ocfs2_super *osb; 764 765 mlog_entry_void(); 766 767 if (!journal) 768 BUG(); 769 770 osb = journal->j_osb; 771 772 status = journal_load(journal->j_journal); 773 if (status < 0) { 774 mlog(ML_ERROR, "Failed to load journal!\n"); 775 goto done; 776 } 777 778 ocfs2_clear_journal_error(osb->sb, journal->j_journal, osb->slot_num); 779 780 status = ocfs2_journal_toggle_dirty(osb, 1); 781 if (status < 0) { 782 mlog_errno(status); 783 goto done; 784 } 785 786 /* Launch the commit thread */ 787 osb->commit_task = kthread_run(ocfs2_commit_thread, osb, "ocfs2cmt"); 788 if (IS_ERR(osb->commit_task)) { 789 status = PTR_ERR(osb->commit_task); 790 osb->commit_task = NULL; 791 mlog(ML_ERROR, "unable to launch ocfs2commit thread, error=%d", 792 status); 793 goto done; 794 } 795 796 done: 797 mlog_exit(status); 798 return status; 799 } 800 801 802 /* 'full' flag tells us whether we clear out all blocks or if we just 803 * mark the journal clean */ 804 int ocfs2_journal_wipe(struct ocfs2_journal *journal, int full) 805 { 806 int status; 807 808 mlog_entry_void(); 809 810 BUG_ON(!journal); 811 812 status = journal_wipe(journal->j_journal, full); 813 if (status < 0) { 814 mlog_errno(status); 815 goto bail; 816 } 817 818 status = ocfs2_journal_toggle_dirty(journal->j_osb, 0); 819 if (status < 0) 820 mlog_errno(status); 821 822 bail: 823 mlog_exit(status); 824 return status; 825 } 826 827 /* 828 * JBD Might read a cached version of another nodes journal file. We 829 * don't want this as this file changes often and we get no 830 * notification on those changes. The only way to be sure that we've 831 * got the most up to date version of those blocks then is to force 832 * read them off disk. Just searching through the buffer cache won't 833 * work as there may be pages backing this file which are still marked 834 * up to date. We know things can't change on this file underneath us 835 * as we have the lock by now :) 836 */ 837 static int ocfs2_force_read_journal(struct inode *inode) 838 { 839 int status = 0; 840 int i, p_blocks; 841 u64 v_blkno, p_blkno; 842 #define CONCURRENT_JOURNAL_FILL 32 843 struct buffer_head *bhs[CONCURRENT_JOURNAL_FILL]; 844 845 mlog_entry_void(); 846 847 BUG_ON(inode->i_blocks != 848 ocfs2_align_bytes_to_sectors(i_size_read(inode))); 849 850 memset(bhs, 0, sizeof(struct buffer_head *) * CONCURRENT_JOURNAL_FILL); 851 852 mlog(0, "Force reading %llu blocks\n", 853 (unsigned long long)(inode->i_blocks >> 854 (inode->i_sb->s_blocksize_bits - 9))); 855 856 v_blkno = 0; 857 while (v_blkno < 858 (inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9))) { 859 860 status = ocfs2_extent_map_get_blocks(inode, v_blkno, 861 1, &p_blkno, 862 &p_blocks); 863 if (status < 0) { 864 mlog_errno(status); 865 goto bail; 866 } 867 868 if (p_blocks > CONCURRENT_JOURNAL_FILL) 869 p_blocks = CONCURRENT_JOURNAL_FILL; 870 871 /* We are reading journal data which should not 872 * be put in the uptodate cache */ 873 status = ocfs2_read_blocks(OCFS2_SB(inode->i_sb), 874 p_blkno, p_blocks, bhs, 0, 875 NULL); 876 if (status < 0) { 877 mlog_errno(status); 878 goto bail; 879 } 880 881 for(i = 0; i < p_blocks; i++) { 882 brelse(bhs[i]); 883 bhs[i] = NULL; 884 } 885 886 v_blkno += p_blocks; 887 } 888 889 bail: 890 for(i = 0; i < CONCURRENT_JOURNAL_FILL; i++) 891 if (bhs[i]) 892 brelse(bhs[i]); 893 mlog_exit(status); 894 return status; 895 } 896 897 struct ocfs2_la_recovery_item { 898 struct list_head lri_list; 899 int lri_slot; 900 struct ocfs2_dinode *lri_la_dinode; 901 struct ocfs2_dinode *lri_tl_dinode; 902 }; 903 904 /* Does the second half of the recovery process. By this point, the 905 * node is marked clean and can actually be considered recovered, 906 * hence it's no longer in the recovery map, but there's still some 907 * cleanup we can do which shouldn't happen within the recovery thread 908 * as locking in that context becomes very difficult if we are to take 909 * recovering nodes into account. 910 * 911 * NOTE: This function can and will sleep on recovery of other nodes 912 * during cluster locking, just like any other ocfs2 process. 913 */ 914 void ocfs2_complete_recovery(void *data) 915 { 916 int ret; 917 struct ocfs2_super *osb = data; 918 struct ocfs2_journal *journal = osb->journal; 919 struct ocfs2_dinode *la_dinode, *tl_dinode; 920 struct ocfs2_la_recovery_item *item; 921 struct list_head *p, *n; 922 LIST_HEAD(tmp_la_list); 923 924 mlog_entry_void(); 925 926 mlog(0, "completing recovery from keventd\n"); 927 928 spin_lock(&journal->j_lock); 929 list_splice_init(&journal->j_la_cleanups, &tmp_la_list); 930 spin_unlock(&journal->j_lock); 931 932 list_for_each_safe(p, n, &tmp_la_list) { 933 item = list_entry(p, struct ocfs2_la_recovery_item, lri_list); 934 list_del_init(&item->lri_list); 935 936 mlog(0, "Complete recovery for slot %d\n", item->lri_slot); 937 938 la_dinode = item->lri_la_dinode; 939 if (la_dinode) { 940 mlog(0, "Clean up local alloc %llu\n", 941 (unsigned long long)la_dinode->i_blkno); 942 943 ret = ocfs2_complete_local_alloc_recovery(osb, 944 la_dinode); 945 if (ret < 0) 946 mlog_errno(ret); 947 948 kfree(la_dinode); 949 } 950 951 tl_dinode = item->lri_tl_dinode; 952 if (tl_dinode) { 953 mlog(0, "Clean up truncate log %llu\n", 954 (unsigned long long)tl_dinode->i_blkno); 955 956 ret = ocfs2_complete_truncate_log_recovery(osb, 957 tl_dinode); 958 if (ret < 0) 959 mlog_errno(ret); 960 961 kfree(tl_dinode); 962 } 963 964 ret = ocfs2_recover_orphans(osb, item->lri_slot); 965 if (ret < 0) 966 mlog_errno(ret); 967 968 kfree(item); 969 } 970 971 mlog(0, "Recovery completion\n"); 972 mlog_exit_void(); 973 } 974 975 /* NOTE: This function always eats your references to la_dinode and 976 * tl_dinode, either manually on error, or by passing them to 977 * ocfs2_complete_recovery */ 978 static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal, 979 int slot_num, 980 struct ocfs2_dinode *la_dinode, 981 struct ocfs2_dinode *tl_dinode) 982 { 983 struct ocfs2_la_recovery_item *item; 984 985 item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_NOFS); 986 if (!item) { 987 /* Though we wish to avoid it, we are in fact safe in 988 * skipping local alloc cleanup as fsck.ocfs2 is more 989 * than capable of reclaiming unused space. */ 990 if (la_dinode) 991 kfree(la_dinode); 992 993 if (tl_dinode) 994 kfree(tl_dinode); 995 996 mlog_errno(-ENOMEM); 997 return; 998 } 999 1000 INIT_LIST_HEAD(&item->lri_list); 1001 item->lri_la_dinode = la_dinode; 1002 item->lri_slot = slot_num; 1003 item->lri_tl_dinode = tl_dinode; 1004 1005 spin_lock(&journal->j_lock); 1006 list_add_tail(&item->lri_list, &journal->j_la_cleanups); 1007 queue_work(ocfs2_wq, &journal->j_recovery_work); 1008 spin_unlock(&journal->j_lock); 1009 } 1010 1011 /* Called by the mount code to queue recovery the last part of 1012 * recovery for it's own slot. */ 1013 void ocfs2_complete_mount_recovery(struct ocfs2_super *osb) 1014 { 1015 struct ocfs2_journal *journal = osb->journal; 1016 1017 if (osb->dirty) { 1018 /* No need to queue up our truncate_log as regular 1019 * cleanup will catch that. */ 1020 ocfs2_queue_recovery_completion(journal, 1021 osb->slot_num, 1022 osb->local_alloc_copy, 1023 NULL); 1024 ocfs2_schedule_truncate_log_flush(osb, 0); 1025 1026 osb->local_alloc_copy = NULL; 1027 osb->dirty = 0; 1028 } 1029 } 1030 1031 static int __ocfs2_recovery_thread(void *arg) 1032 { 1033 int status, node_num; 1034 struct ocfs2_super *osb = arg; 1035 1036 mlog_entry_void(); 1037 1038 status = ocfs2_wait_on_mount(osb); 1039 if (status < 0) { 1040 goto bail; 1041 } 1042 1043 restart: 1044 status = ocfs2_super_lock(osb, 1); 1045 if (status < 0) { 1046 mlog_errno(status); 1047 goto bail; 1048 } 1049 1050 while(!ocfs2_node_map_is_empty(osb, &osb->recovery_map)) { 1051 node_num = ocfs2_node_map_first_set_bit(osb, 1052 &osb->recovery_map); 1053 if (node_num == O2NM_INVALID_NODE_NUM) { 1054 mlog(0, "Out of nodes to recover.\n"); 1055 break; 1056 } 1057 1058 status = ocfs2_recover_node(osb, node_num); 1059 if (status < 0) { 1060 mlog(ML_ERROR, 1061 "Error %d recovering node %d on device (%u,%u)!\n", 1062 status, node_num, 1063 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1064 mlog(ML_ERROR, "Volume requires unmount.\n"); 1065 continue; 1066 } 1067 1068 ocfs2_recovery_map_clear(osb, node_num); 1069 } 1070 ocfs2_super_unlock(osb, 1); 1071 1072 /* We always run recovery on our own orphan dir - the dead 1073 * node(s) may have voted "no" on an inode delete earlier. A 1074 * revote is therefore required. */ 1075 ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL, 1076 NULL); 1077 1078 bail: 1079 mutex_lock(&osb->recovery_lock); 1080 if (!status && 1081 !ocfs2_node_map_is_empty(osb, &osb->recovery_map)) { 1082 mutex_unlock(&osb->recovery_lock); 1083 goto restart; 1084 } 1085 1086 osb->recovery_thread_task = NULL; 1087 mb(); /* sync with ocfs2_recovery_thread_running */ 1088 wake_up(&osb->recovery_event); 1089 1090 mutex_unlock(&osb->recovery_lock); 1091 1092 mlog_exit(status); 1093 /* no one is callint kthread_stop() for us so the kthread() api 1094 * requires that we call do_exit(). And it isn't exported, but 1095 * complete_and_exit() seems to be a minimal wrapper around it. */ 1096 complete_and_exit(NULL, status); 1097 return status; 1098 } 1099 1100 void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num) 1101 { 1102 mlog_entry("(node_num=%d, osb->node_num = %d)\n", 1103 node_num, osb->node_num); 1104 1105 mutex_lock(&osb->recovery_lock); 1106 if (osb->disable_recovery) 1107 goto out; 1108 1109 /* People waiting on recovery will wait on 1110 * the recovery map to empty. */ 1111 if (!ocfs2_recovery_map_set(osb, node_num)) 1112 mlog(0, "node %d already be in recovery.\n", node_num); 1113 1114 mlog(0, "starting recovery thread...\n"); 1115 1116 if (osb->recovery_thread_task) 1117 goto out; 1118 1119 osb->recovery_thread_task = kthread_run(__ocfs2_recovery_thread, osb, 1120 "ocfs2rec"); 1121 if (IS_ERR(osb->recovery_thread_task)) { 1122 mlog_errno((int)PTR_ERR(osb->recovery_thread_task)); 1123 osb->recovery_thread_task = NULL; 1124 } 1125 1126 out: 1127 mutex_unlock(&osb->recovery_lock); 1128 wake_up(&osb->recovery_event); 1129 1130 mlog_exit_void(); 1131 } 1132 1133 /* Does the actual journal replay and marks the journal inode as 1134 * clean. Will only replay if the journal inode is marked dirty. */ 1135 static int ocfs2_replay_journal(struct ocfs2_super *osb, 1136 int node_num, 1137 int slot_num) 1138 { 1139 int status; 1140 int got_lock = 0; 1141 unsigned int flags; 1142 struct inode *inode = NULL; 1143 struct ocfs2_dinode *fe; 1144 journal_t *journal = NULL; 1145 struct buffer_head *bh = NULL; 1146 1147 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, 1148 slot_num); 1149 if (inode == NULL) { 1150 status = -EACCES; 1151 mlog_errno(status); 1152 goto done; 1153 } 1154 if (is_bad_inode(inode)) { 1155 status = -EACCES; 1156 iput(inode); 1157 inode = NULL; 1158 mlog_errno(status); 1159 goto done; 1160 } 1161 SET_INODE_JOURNAL(inode); 1162 1163 status = ocfs2_meta_lock_full(inode, NULL, &bh, 1, 1164 OCFS2_META_LOCK_RECOVERY); 1165 if (status < 0) { 1166 mlog(0, "status returned from ocfs2_meta_lock=%d\n", status); 1167 if (status != -ERESTARTSYS) 1168 mlog(ML_ERROR, "Could not lock journal!\n"); 1169 goto done; 1170 } 1171 got_lock = 1; 1172 1173 fe = (struct ocfs2_dinode *) bh->b_data; 1174 1175 flags = le32_to_cpu(fe->id1.journal1.ij_flags); 1176 1177 if (!(flags & OCFS2_JOURNAL_DIRTY_FL)) { 1178 mlog(0, "No recovery required for node %d\n", node_num); 1179 goto done; 1180 } 1181 1182 mlog(ML_NOTICE, "Recovering node %d from slot %d on device (%u,%u)\n", 1183 node_num, slot_num, 1184 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1185 1186 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 1187 1188 status = ocfs2_force_read_journal(inode); 1189 if (status < 0) { 1190 mlog_errno(status); 1191 goto done; 1192 } 1193 1194 mlog(0, "calling journal_init_inode\n"); 1195 journal = journal_init_inode(inode); 1196 if (journal == NULL) { 1197 mlog(ML_ERROR, "Linux journal layer error\n"); 1198 status = -EIO; 1199 goto done; 1200 } 1201 1202 status = journal_load(journal); 1203 if (status < 0) { 1204 mlog_errno(status); 1205 if (!igrab(inode)) 1206 BUG(); 1207 journal_destroy(journal); 1208 goto done; 1209 } 1210 1211 ocfs2_clear_journal_error(osb->sb, journal, slot_num); 1212 1213 /* wipe the journal */ 1214 mlog(0, "flushing the journal.\n"); 1215 journal_lock_updates(journal); 1216 status = journal_flush(journal); 1217 journal_unlock_updates(journal); 1218 if (status < 0) 1219 mlog_errno(status); 1220 1221 /* This will mark the node clean */ 1222 flags = le32_to_cpu(fe->id1.journal1.ij_flags); 1223 flags &= ~OCFS2_JOURNAL_DIRTY_FL; 1224 fe->id1.journal1.ij_flags = cpu_to_le32(flags); 1225 1226 status = ocfs2_write_block(osb, bh, inode); 1227 if (status < 0) 1228 mlog_errno(status); 1229 1230 if (!igrab(inode)) 1231 BUG(); 1232 1233 journal_destroy(journal); 1234 1235 done: 1236 /* drop the lock on this nodes journal */ 1237 if (got_lock) 1238 ocfs2_meta_unlock(inode, 1); 1239 1240 if (inode) 1241 iput(inode); 1242 1243 if (bh) 1244 brelse(bh); 1245 1246 mlog_exit(status); 1247 return status; 1248 } 1249 1250 /* 1251 * Do the most important parts of node recovery: 1252 * - Replay it's journal 1253 * - Stamp a clean local allocator file 1254 * - Stamp a clean truncate log 1255 * - Mark the node clean 1256 * 1257 * If this function completes without error, a node in OCFS2 can be 1258 * said to have been safely recovered. As a result, failure during the 1259 * second part of a nodes recovery process (local alloc recovery) is 1260 * far less concerning. 1261 */ 1262 static int ocfs2_recover_node(struct ocfs2_super *osb, 1263 int node_num) 1264 { 1265 int status = 0; 1266 int slot_num; 1267 struct ocfs2_slot_info *si = osb->slot_info; 1268 struct ocfs2_dinode *la_copy = NULL; 1269 struct ocfs2_dinode *tl_copy = NULL; 1270 1271 mlog_entry("(node_num=%d, osb->node_num = %d)\n", 1272 node_num, osb->node_num); 1273 1274 mlog(0, "checking node %d\n", node_num); 1275 1276 /* Should not ever be called to recover ourselves -- in that 1277 * case we should've called ocfs2_journal_load instead. */ 1278 BUG_ON(osb->node_num == node_num); 1279 1280 slot_num = ocfs2_node_num_to_slot(si, node_num); 1281 if (slot_num == OCFS2_INVALID_SLOT) { 1282 status = 0; 1283 mlog(0, "no slot for this node, so no recovery required.\n"); 1284 goto done; 1285 } 1286 1287 mlog(0, "node %d was using slot %d\n", node_num, slot_num); 1288 1289 status = ocfs2_replay_journal(osb, node_num, slot_num); 1290 if (status < 0) { 1291 mlog_errno(status); 1292 goto done; 1293 } 1294 1295 /* Stamp a clean local alloc file AFTER recovering the journal... */ 1296 status = ocfs2_begin_local_alloc_recovery(osb, slot_num, &la_copy); 1297 if (status < 0) { 1298 mlog_errno(status); 1299 goto done; 1300 } 1301 1302 /* An error from begin_truncate_log_recovery is not 1303 * serious enough to warrant halting the rest of 1304 * recovery. */ 1305 status = ocfs2_begin_truncate_log_recovery(osb, slot_num, &tl_copy); 1306 if (status < 0) 1307 mlog_errno(status); 1308 1309 /* Likewise, this would be a strange but ultimately not so 1310 * harmful place to get an error... */ 1311 ocfs2_clear_slot(si, slot_num); 1312 status = ocfs2_update_disk_slots(osb, si); 1313 if (status < 0) 1314 mlog_errno(status); 1315 1316 /* This will kfree the memory pointed to by la_copy and tl_copy */ 1317 ocfs2_queue_recovery_completion(osb->journal, slot_num, la_copy, 1318 tl_copy); 1319 1320 status = 0; 1321 done: 1322 1323 mlog_exit(status); 1324 return status; 1325 } 1326 1327 /* Test node liveness by trylocking his journal. If we get the lock, 1328 * we drop it here. Return 0 if we got the lock, -EAGAIN if node is 1329 * still alive (we couldn't get the lock) and < 0 on error. */ 1330 static int ocfs2_trylock_journal(struct ocfs2_super *osb, 1331 int slot_num) 1332 { 1333 int status, flags; 1334 struct inode *inode = NULL; 1335 1336 inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, 1337 slot_num); 1338 if (inode == NULL) { 1339 mlog(ML_ERROR, "access error\n"); 1340 status = -EACCES; 1341 goto bail; 1342 } 1343 if (is_bad_inode(inode)) { 1344 mlog(ML_ERROR, "access error (bad inode)\n"); 1345 iput(inode); 1346 inode = NULL; 1347 status = -EACCES; 1348 goto bail; 1349 } 1350 SET_INODE_JOURNAL(inode); 1351 1352 flags = OCFS2_META_LOCK_RECOVERY | OCFS2_META_LOCK_NOQUEUE; 1353 status = ocfs2_meta_lock_full(inode, NULL, NULL, 1, flags); 1354 if (status < 0) { 1355 if (status != -EAGAIN) 1356 mlog_errno(status); 1357 goto bail; 1358 } 1359 1360 ocfs2_meta_unlock(inode, 1); 1361 bail: 1362 if (inode) 1363 iput(inode); 1364 1365 return status; 1366 } 1367 1368 /* Call this underneath ocfs2_super_lock. It also assumes that the 1369 * slot info struct has been updated from disk. */ 1370 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb) 1371 { 1372 int status, i, node_num; 1373 struct ocfs2_slot_info *si = osb->slot_info; 1374 1375 /* This is called with the super block cluster lock, so we 1376 * know that the slot map can't change underneath us. */ 1377 1378 spin_lock(&si->si_lock); 1379 for(i = 0; i < si->si_num_slots; i++) { 1380 if (i == osb->slot_num) 1381 continue; 1382 if (ocfs2_is_empty_slot(si, i)) 1383 continue; 1384 1385 node_num = si->si_global_node_nums[i]; 1386 if (ocfs2_node_map_test_bit(osb, &osb->recovery_map, node_num)) 1387 continue; 1388 spin_unlock(&si->si_lock); 1389 1390 /* Ok, we have a slot occupied by another node which 1391 * is not in the recovery map. We trylock his journal 1392 * file here to test if he's alive. */ 1393 status = ocfs2_trylock_journal(osb, i); 1394 if (!status) { 1395 /* Since we're called from mount, we know that 1396 * the recovery thread can't race us on 1397 * setting / checking the recovery bits. */ 1398 ocfs2_recovery_thread(osb, node_num); 1399 } else if ((status < 0) && (status != -EAGAIN)) { 1400 mlog_errno(status); 1401 goto bail; 1402 } 1403 1404 spin_lock(&si->si_lock); 1405 } 1406 spin_unlock(&si->si_lock); 1407 1408 status = 0; 1409 bail: 1410 mlog_exit(status); 1411 return status; 1412 } 1413 1414 static int ocfs2_queue_orphans(struct ocfs2_super *osb, 1415 int slot, 1416 struct inode **head) 1417 { 1418 int status; 1419 struct inode *orphan_dir_inode = NULL; 1420 struct inode *iter; 1421 unsigned long offset, blk, local; 1422 struct buffer_head *bh = NULL; 1423 struct ocfs2_dir_entry *de; 1424 struct super_block *sb = osb->sb; 1425 1426 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 1427 ORPHAN_DIR_SYSTEM_INODE, 1428 slot); 1429 if (!orphan_dir_inode) { 1430 status = -ENOENT; 1431 mlog_errno(status); 1432 return status; 1433 } 1434 1435 mutex_lock(&orphan_dir_inode->i_mutex); 1436 status = ocfs2_meta_lock(orphan_dir_inode, NULL, NULL, 0); 1437 if (status < 0) { 1438 mlog_errno(status); 1439 goto out; 1440 } 1441 1442 offset = 0; 1443 iter = NULL; 1444 while(offset < i_size_read(orphan_dir_inode)) { 1445 blk = offset >> sb->s_blocksize_bits; 1446 1447 bh = ocfs2_bread(orphan_dir_inode, blk, &status, 0); 1448 if (!bh) 1449 status = -EINVAL; 1450 if (status < 0) { 1451 if (bh) 1452 brelse(bh); 1453 mlog_errno(status); 1454 goto out_unlock; 1455 } 1456 1457 local = 0; 1458 while(offset < i_size_read(orphan_dir_inode) 1459 && local < sb->s_blocksize) { 1460 de = (struct ocfs2_dir_entry *) (bh->b_data + local); 1461 1462 if (!ocfs2_check_dir_entry(orphan_dir_inode, 1463 de, bh, local)) { 1464 status = -EINVAL; 1465 mlog_errno(status); 1466 brelse(bh); 1467 goto out_unlock; 1468 } 1469 1470 local += le16_to_cpu(de->rec_len); 1471 offset += le16_to_cpu(de->rec_len); 1472 1473 /* I guess we silently fail on no inode? */ 1474 if (!le64_to_cpu(de->inode)) 1475 continue; 1476 if (de->file_type > OCFS2_FT_MAX) { 1477 mlog(ML_ERROR, 1478 "block %llu contains invalid de: " 1479 "inode = %llu, rec_len = %u, " 1480 "name_len = %u, file_type = %u, " 1481 "name='%.*s'\n", 1482 (unsigned long long)bh->b_blocknr, 1483 (unsigned long long)le64_to_cpu(de->inode), 1484 le16_to_cpu(de->rec_len), 1485 de->name_len, 1486 de->file_type, 1487 de->name_len, 1488 de->name); 1489 continue; 1490 } 1491 if (de->name_len == 1 && !strncmp(".", de->name, 1)) 1492 continue; 1493 if (de->name_len == 2 && !strncmp("..", de->name, 2)) 1494 continue; 1495 1496 iter = ocfs2_iget(osb, le64_to_cpu(de->inode)); 1497 if (IS_ERR(iter)) 1498 continue; 1499 1500 mlog(0, "queue orphan %llu\n", 1501 (unsigned long long)OCFS2_I(iter)->ip_blkno); 1502 /* No locking is required for the next_orphan 1503 * queue as there is only ever a single 1504 * process doing orphan recovery. */ 1505 OCFS2_I(iter)->ip_next_orphan = *head; 1506 *head = iter; 1507 } 1508 brelse(bh); 1509 } 1510 1511 out_unlock: 1512 ocfs2_meta_unlock(orphan_dir_inode, 0); 1513 out: 1514 mutex_unlock(&orphan_dir_inode->i_mutex); 1515 iput(orphan_dir_inode); 1516 return status; 1517 } 1518 1519 static int ocfs2_orphan_recovery_can_continue(struct ocfs2_super *osb, 1520 int slot) 1521 { 1522 int ret; 1523 1524 spin_lock(&osb->osb_lock); 1525 ret = !osb->osb_orphan_wipes[slot]; 1526 spin_unlock(&osb->osb_lock); 1527 return ret; 1528 } 1529 1530 static void ocfs2_mark_recovering_orphan_dir(struct ocfs2_super *osb, 1531 int slot) 1532 { 1533 spin_lock(&osb->osb_lock); 1534 /* Mark ourselves such that new processes in delete_inode() 1535 * know to quit early. */ 1536 ocfs2_node_map_set_bit(osb, &osb->osb_recovering_orphan_dirs, slot); 1537 while (osb->osb_orphan_wipes[slot]) { 1538 /* If any processes are already in the middle of an 1539 * orphan wipe on this dir, then we need to wait for 1540 * them. */ 1541 spin_unlock(&osb->osb_lock); 1542 wait_event_interruptible(osb->osb_wipe_event, 1543 ocfs2_orphan_recovery_can_continue(osb, slot)); 1544 spin_lock(&osb->osb_lock); 1545 } 1546 spin_unlock(&osb->osb_lock); 1547 } 1548 1549 static void ocfs2_clear_recovering_orphan_dir(struct ocfs2_super *osb, 1550 int slot) 1551 { 1552 ocfs2_node_map_clear_bit(osb, &osb->osb_recovering_orphan_dirs, slot); 1553 } 1554 1555 /* 1556 * Orphan recovery. Each mounted node has it's own orphan dir which we 1557 * must run during recovery. Our strategy here is to build a list of 1558 * the inodes in the orphan dir and iget/iput them. The VFS does 1559 * (most) of the rest of the work. 1560 * 1561 * Orphan recovery can happen at any time, not just mount so we have a 1562 * couple of extra considerations. 1563 * 1564 * - We grab as many inodes as we can under the orphan dir lock - 1565 * doing iget() outside the orphan dir risks getting a reference on 1566 * an invalid inode. 1567 * - We must be sure not to deadlock with other processes on the 1568 * system wanting to run delete_inode(). This can happen when they go 1569 * to lock the orphan dir and the orphan recovery process attempts to 1570 * iget() inside the orphan dir lock. This can be avoided by 1571 * advertising our state to ocfs2_delete_inode(). 1572 */ 1573 static int ocfs2_recover_orphans(struct ocfs2_super *osb, 1574 int slot) 1575 { 1576 int ret = 0; 1577 struct inode *inode = NULL; 1578 struct inode *iter; 1579 struct ocfs2_inode_info *oi; 1580 1581 mlog(0, "Recover inodes from orphan dir in slot %d\n", slot); 1582 1583 ocfs2_mark_recovering_orphan_dir(osb, slot); 1584 ret = ocfs2_queue_orphans(osb, slot, &inode); 1585 ocfs2_clear_recovering_orphan_dir(osb, slot); 1586 1587 /* Error here should be noted, but we want to continue with as 1588 * many queued inodes as we've got. */ 1589 if (ret) 1590 mlog_errno(ret); 1591 1592 while (inode) { 1593 oi = OCFS2_I(inode); 1594 mlog(0, "iput orphan %llu\n", (unsigned long long)oi->ip_blkno); 1595 1596 iter = oi->ip_next_orphan; 1597 1598 spin_lock(&oi->ip_lock); 1599 /* Delete voting may have set these on the assumption 1600 * that the other node would wipe them successfully. 1601 * If they are still in the node's orphan dir, we need 1602 * to reset that state. */ 1603 oi->ip_flags &= ~(OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE); 1604 1605 /* Set the proper information to get us going into 1606 * ocfs2_delete_inode. */ 1607 oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; 1608 oi->ip_orphaned_slot = slot; 1609 spin_unlock(&oi->ip_lock); 1610 1611 iput(inode); 1612 1613 inode = iter; 1614 } 1615 1616 return ret; 1617 } 1618 1619 static int ocfs2_wait_on_mount(struct ocfs2_super *osb) 1620 { 1621 /* This check is good because ocfs2 will wait on our recovery 1622 * thread before changing it to something other than MOUNTED 1623 * or DISABLED. */ 1624 wait_event(osb->osb_mount_event, 1625 atomic_read(&osb->vol_state) == VOLUME_MOUNTED || 1626 atomic_read(&osb->vol_state) == VOLUME_DISABLED); 1627 1628 /* If there's an error on mount, then we may never get to the 1629 * MOUNTED flag, but this is set right before 1630 * dismount_volume() so we can trust it. */ 1631 if (atomic_read(&osb->vol_state) == VOLUME_DISABLED) { 1632 mlog(0, "mount error, exiting!\n"); 1633 return -EBUSY; 1634 } 1635 1636 return 0; 1637 } 1638 1639 static int ocfs2_commit_thread(void *arg) 1640 { 1641 int status; 1642 struct ocfs2_super *osb = arg; 1643 struct ocfs2_journal *journal = osb->journal; 1644 1645 /* we can trust j_num_trans here because _should_stop() is only set in 1646 * shutdown and nobody other than ourselves should be able to start 1647 * transactions. committing on shutdown might take a few iterations 1648 * as final transactions put deleted inodes on the list */ 1649 while (!(kthread_should_stop() && 1650 atomic_read(&journal->j_num_trans) == 0)) { 1651 1652 wait_event_interruptible(osb->checkpoint_event, 1653 atomic_read(&journal->j_num_trans) 1654 || kthread_should_stop()); 1655 1656 status = ocfs2_commit_cache(osb); 1657 if (status < 0) 1658 mlog_errno(status); 1659 1660 if (kthread_should_stop() && atomic_read(&journal->j_num_trans)){ 1661 mlog(ML_KTHREAD, 1662 "commit_thread: %u transactions pending on " 1663 "shutdown\n", 1664 atomic_read(&journal->j_num_trans)); 1665 } 1666 } 1667 1668 return 0; 1669 } 1670 1671 /* Look for a dirty journal without taking any cluster locks. Used for 1672 * hard readonly access to determine whether the file system journals 1673 * require recovery. */ 1674 int ocfs2_check_journals_nolocks(struct ocfs2_super *osb) 1675 { 1676 int ret = 0; 1677 unsigned int slot; 1678 struct buffer_head *di_bh; 1679 struct ocfs2_dinode *di; 1680 struct inode *journal = NULL; 1681 1682 for(slot = 0; slot < osb->max_slots; slot++) { 1683 journal = ocfs2_get_system_file_inode(osb, 1684 JOURNAL_SYSTEM_INODE, 1685 slot); 1686 if (!journal || is_bad_inode(journal)) { 1687 ret = -EACCES; 1688 mlog_errno(ret); 1689 goto out; 1690 } 1691 1692 di_bh = NULL; 1693 ret = ocfs2_read_block(osb, OCFS2_I(journal)->ip_blkno, &di_bh, 1694 0, journal); 1695 if (ret < 0) { 1696 mlog_errno(ret); 1697 goto out; 1698 } 1699 1700 di = (struct ocfs2_dinode *) di_bh->b_data; 1701 1702 if (le32_to_cpu(di->id1.journal1.ij_flags) & 1703 OCFS2_JOURNAL_DIRTY_FL) 1704 ret = -EROFS; 1705 1706 brelse(di_bh); 1707 if (ret) 1708 break; 1709 } 1710 1711 out: 1712 if (journal) 1713 iput(journal); 1714 1715 return ret; 1716 } 1717