1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * super.c 4 * 5 * load/unload driver, mount/dismount volumes 6 * 7 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 8 */ 9 10 #include <linux/module.h> 11 #include <linux/fs.h> 12 #include <linux/types.h> 13 #include <linux/slab.h> 14 #include <linux/highmem.h> 15 #include <linux/init.h> 16 #include <linux/random.h> 17 #include <linux/statfs.h> 18 #include <linux/moduleparam.h> 19 #include <linux/blkdev.h> 20 #include <linux/socket.h> 21 #include <linux/inet.h> 22 #include <linux/parser.h> 23 #include <linux/crc32.h> 24 #include <linux/debugfs.h> 25 #include <linux/mount.h> 26 #include <linux/seq_file.h> 27 #include <linux/quotaops.h> 28 #include <linux/cleancache.h> 29 #include <linux/signal.h> 30 31 #define CREATE_TRACE_POINTS 32 #include "ocfs2_trace.h" 33 34 #include <cluster/masklog.h> 35 36 #include "ocfs2.h" 37 38 /* this should be the only file to include a version 1 header */ 39 #include "ocfs1_fs_compat.h" 40 41 #include "alloc.h" 42 #include "aops.h" 43 #include "blockcheck.h" 44 #include "dlmglue.h" 45 #include "export.h" 46 #include "extent_map.h" 47 #include "heartbeat.h" 48 #include "inode.h" 49 #include "journal.h" 50 #include "localalloc.h" 51 #include "namei.h" 52 #include "slot_map.h" 53 #include "super.h" 54 #include "sysfile.h" 55 #include "uptodate.h" 56 #include "xattr.h" 57 #include "quota.h" 58 #include "refcounttree.h" 59 #include "suballoc.h" 60 61 #include "buffer_head_io.h" 62 #include "filecheck.h" 63 64 static struct kmem_cache *ocfs2_inode_cachep; 65 struct kmem_cache *ocfs2_dquot_cachep; 66 struct kmem_cache *ocfs2_qf_chunk_cachep; 67 68 static struct dentry *ocfs2_debugfs_root; 69 70 MODULE_AUTHOR("Oracle"); 71 MODULE_LICENSE("GPL"); 72 MODULE_DESCRIPTION("OCFS2 cluster file system"); 73 74 struct mount_options 75 { 76 unsigned long commit_interval; 77 unsigned long mount_opt; 78 unsigned int atime_quantum; 79 unsigned short slot; 80 int localalloc_opt; 81 unsigned int resv_level; 82 int dir_resv_level; 83 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 84 }; 85 86 static int ocfs2_parse_options(struct super_block *sb, char *options, 87 struct mount_options *mopt, 88 int is_remount); 89 static int ocfs2_check_set_options(struct super_block *sb, 90 struct mount_options *options); 91 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 92 static void ocfs2_put_super(struct super_block *sb); 93 static int ocfs2_mount_volume(struct super_block *sb); 94 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 95 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 96 static int ocfs2_initialize_mem_caches(void); 97 static void ocfs2_free_mem_caches(void); 98 static void ocfs2_delete_osb(struct ocfs2_super *osb); 99 100 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 101 102 static int ocfs2_sync_fs(struct super_block *sb, int wait); 103 104 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 105 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 106 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 107 static int ocfs2_check_volume(struct ocfs2_super *osb); 108 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 109 struct buffer_head *bh, 110 u32 sectsize, 111 struct ocfs2_blockcheck_stats *stats); 112 static int ocfs2_initialize_super(struct super_block *sb, 113 struct buffer_head *bh, 114 int sector_size, 115 struct ocfs2_blockcheck_stats *stats); 116 static int ocfs2_get_sector(struct super_block *sb, 117 struct buffer_head **bh, 118 int block, 119 int sect_size); 120 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 121 static void ocfs2_free_inode(struct inode *inode); 122 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 123 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 124 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 125 126 static struct dquot **ocfs2_get_dquots(struct inode *inode) 127 { 128 return OCFS2_I(inode)->i_dquot; 129 } 130 131 static const struct super_operations ocfs2_sops = { 132 .statfs = ocfs2_statfs, 133 .alloc_inode = ocfs2_alloc_inode, 134 .free_inode = ocfs2_free_inode, 135 .drop_inode = ocfs2_drop_inode, 136 .evict_inode = ocfs2_evict_inode, 137 .sync_fs = ocfs2_sync_fs, 138 .put_super = ocfs2_put_super, 139 .remount_fs = ocfs2_remount, 140 .show_options = ocfs2_show_options, 141 .quota_read = ocfs2_quota_read, 142 .quota_write = ocfs2_quota_write, 143 .get_dquots = ocfs2_get_dquots, 144 }; 145 146 enum { 147 Opt_barrier, 148 Opt_err_panic, 149 Opt_err_ro, 150 Opt_intr, 151 Opt_nointr, 152 Opt_hb_none, 153 Opt_hb_local, 154 Opt_hb_global, 155 Opt_data_ordered, 156 Opt_data_writeback, 157 Opt_atime_quantum, 158 Opt_slot, 159 Opt_commit, 160 Opt_localalloc, 161 Opt_localflocks, 162 Opt_stack, 163 Opt_user_xattr, 164 Opt_nouser_xattr, 165 Opt_inode64, 166 Opt_acl, 167 Opt_noacl, 168 Opt_usrquota, 169 Opt_grpquota, 170 Opt_coherency_buffered, 171 Opt_coherency_full, 172 Opt_resv_level, 173 Opt_dir_resv_level, 174 Opt_journal_async_commit, 175 Opt_err_cont, 176 Opt_nocluster, 177 Opt_err, 178 }; 179 180 static const match_table_t tokens = { 181 {Opt_barrier, "barrier=%u"}, 182 {Opt_err_panic, "errors=panic"}, 183 {Opt_err_ro, "errors=remount-ro"}, 184 {Opt_intr, "intr"}, 185 {Opt_nointr, "nointr"}, 186 {Opt_hb_none, OCFS2_HB_NONE}, 187 {Opt_hb_local, OCFS2_HB_LOCAL}, 188 {Opt_hb_global, OCFS2_HB_GLOBAL}, 189 {Opt_data_ordered, "data=ordered"}, 190 {Opt_data_writeback, "data=writeback"}, 191 {Opt_atime_quantum, "atime_quantum=%u"}, 192 {Opt_slot, "preferred_slot=%u"}, 193 {Opt_commit, "commit=%u"}, 194 {Opt_localalloc, "localalloc=%d"}, 195 {Opt_localflocks, "localflocks"}, 196 {Opt_stack, "cluster_stack=%s"}, 197 {Opt_user_xattr, "user_xattr"}, 198 {Opt_nouser_xattr, "nouser_xattr"}, 199 {Opt_inode64, "inode64"}, 200 {Opt_acl, "acl"}, 201 {Opt_noacl, "noacl"}, 202 {Opt_usrquota, "usrquota"}, 203 {Opt_grpquota, "grpquota"}, 204 {Opt_coherency_buffered, "coherency=buffered"}, 205 {Opt_coherency_full, "coherency=full"}, 206 {Opt_resv_level, "resv_level=%u"}, 207 {Opt_dir_resv_level, "dir_resv_level=%u"}, 208 {Opt_journal_async_commit, "journal_async_commit"}, 209 {Opt_err_cont, "errors=continue"}, 210 {Opt_nocluster, "nocluster"}, 211 {Opt_err, NULL} 212 }; 213 214 #ifdef CONFIG_DEBUG_FS 215 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 216 { 217 struct ocfs2_cluster_connection *cconn = osb->cconn; 218 struct ocfs2_recovery_map *rm = osb->recovery_map; 219 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 220 int i, out = 0; 221 unsigned long flags; 222 223 out += scnprintf(buf + out, len - out, 224 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 225 "Device", osb->dev_str, osb->uuid_str, 226 osb->fs_generation, osb->vol_label); 227 228 out += scnprintf(buf + out, len - out, 229 "%10s => State: %d Flags: 0x%lX\n", "Volume", 230 atomic_read(&osb->vol_state), osb->osb_flags); 231 232 out += scnprintf(buf + out, len - out, 233 "%10s => Block: %lu Cluster: %d\n", "Sizes", 234 osb->sb->s_blocksize, osb->s_clustersize); 235 236 out += scnprintf(buf + out, len - out, 237 "%10s => Compat: 0x%X Incompat: 0x%X " 238 "ROcompat: 0x%X\n", 239 "Features", osb->s_feature_compat, 240 osb->s_feature_incompat, osb->s_feature_ro_compat); 241 242 out += scnprintf(buf + out, len - out, 243 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 244 osb->s_mount_opt, osb->s_atime_quantum); 245 246 if (cconn) { 247 out += scnprintf(buf + out, len - out, 248 "%10s => Stack: %s Name: %*s " 249 "Version: %d.%d\n", "Cluster", 250 (*osb->osb_cluster_stack == '\0' ? 251 "o2cb" : osb->osb_cluster_stack), 252 cconn->cc_namelen, cconn->cc_name, 253 cconn->cc_version.pv_major, 254 cconn->cc_version.pv_minor); 255 } 256 257 spin_lock_irqsave(&osb->dc_task_lock, flags); 258 out += scnprintf(buf + out, len - out, 259 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 260 "WorkSeq: %lu\n", "DownCnvt", 261 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 262 osb->blocked_lock_count, osb->dc_wake_sequence, 263 osb->dc_work_sequence); 264 spin_unlock_irqrestore(&osb->dc_task_lock, flags); 265 266 spin_lock(&osb->osb_lock); 267 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 268 "Recovery", 269 (osb->recovery_thread_task ? 270 task_pid_nr(osb->recovery_thread_task) : -1)); 271 if (rm->rm_used == 0) 272 out += scnprintf(buf + out, len - out, " None\n"); 273 else { 274 for (i = 0; i < rm->rm_used; i++) 275 out += scnprintf(buf + out, len - out, " %d", 276 rm->rm_entries[i]); 277 out += scnprintf(buf + out, len - out, "\n"); 278 } 279 spin_unlock(&osb->osb_lock); 280 281 out += scnprintf(buf + out, len - out, 282 "%10s => Pid: %d Interval: %lu\n", "Commit", 283 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 284 osb->osb_commit_interval); 285 286 out += scnprintf(buf + out, len - out, 287 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 288 "Journal", osb->journal->j_state, 289 osb->journal->j_trans_id, 290 atomic_read(&osb->journal->j_num_trans)); 291 292 out += scnprintf(buf + out, len - out, 293 "%10s => GlobalAllocs: %d LocalAllocs: %d " 294 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 295 "Stats", 296 atomic_read(&osb->alloc_stats.bitmap_data), 297 atomic_read(&osb->alloc_stats.local_data), 298 atomic_read(&osb->alloc_stats.bg_allocs), 299 atomic_read(&osb->alloc_stats.moves), 300 atomic_read(&osb->alloc_stats.bg_extends)); 301 302 out += scnprintf(buf + out, len - out, 303 "%10s => State: %u Descriptor: %llu Size: %u bits " 304 "Default: %u bits\n", 305 "LocalAlloc", osb->local_alloc_state, 306 (unsigned long long)osb->la_last_gd, 307 osb->local_alloc_bits, osb->local_alloc_default_bits); 308 309 spin_lock(&osb->osb_lock); 310 out += scnprintf(buf + out, len - out, 311 "%10s => InodeSlot: %d StolenInodes: %d, " 312 "MetaSlot: %d StolenMeta: %d\n", "Steal", 313 osb->s_inode_steal_slot, 314 atomic_read(&osb->s_num_inodes_stolen), 315 osb->s_meta_steal_slot, 316 atomic_read(&osb->s_num_meta_stolen)); 317 spin_unlock(&osb->osb_lock); 318 319 out += scnprintf(buf + out, len - out, "OrphanScan => "); 320 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ", 321 os->os_count, os->os_seqno); 322 out += scnprintf(buf + out, len - out, " Last Scan: "); 323 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 324 out += scnprintf(buf + out, len - out, "Disabled\n"); 325 else 326 out += scnprintf(buf + out, len - out, "%lu seconds ago\n", 327 (unsigned long)(ktime_get_seconds() - os->os_scantime)); 328 329 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n", 330 "Slots", "Num", "RecoGen"); 331 for (i = 0; i < osb->max_slots; ++i) { 332 out += scnprintf(buf + out, len - out, 333 "%10s %c %3d %10d\n", 334 " ", 335 (i == osb->slot_num ? '*' : ' '), 336 i, osb->slot_recovery_generations[i]); 337 } 338 339 return out; 340 } 341 342 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 343 { 344 struct ocfs2_super *osb = inode->i_private; 345 char *buf = NULL; 346 347 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 348 if (!buf) 349 goto bail; 350 351 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 352 353 file->private_data = buf; 354 355 return 0; 356 bail: 357 return -ENOMEM; 358 } 359 360 static int ocfs2_debug_release(struct inode *inode, struct file *file) 361 { 362 kfree(file->private_data); 363 return 0; 364 } 365 366 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 367 size_t nbytes, loff_t *ppos) 368 { 369 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 370 i_size_read(file->f_mapping->host)); 371 } 372 #else 373 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 374 { 375 return 0; 376 } 377 static int ocfs2_debug_release(struct inode *inode, struct file *file) 378 { 379 return 0; 380 } 381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 382 size_t nbytes, loff_t *ppos) 383 { 384 return 0; 385 } 386 #endif /* CONFIG_DEBUG_FS */ 387 388 static const struct file_operations ocfs2_osb_debug_fops = { 389 .open = ocfs2_osb_debug_open, 390 .release = ocfs2_debug_release, 391 .read = ocfs2_debug_read, 392 .llseek = generic_file_llseek, 393 }; 394 395 static int ocfs2_sync_fs(struct super_block *sb, int wait) 396 { 397 int status; 398 tid_t target; 399 struct ocfs2_super *osb = OCFS2_SB(sb); 400 401 if (ocfs2_is_hard_readonly(osb)) 402 return -EROFS; 403 404 if (wait) { 405 status = ocfs2_flush_truncate_log(osb); 406 if (status < 0) 407 mlog_errno(status); 408 } else { 409 ocfs2_schedule_truncate_log_flush(osb, 0); 410 } 411 412 if (jbd2_journal_start_commit(osb->journal->j_journal, 413 &target)) { 414 if (wait) 415 jbd2_log_wait_commit(osb->journal->j_journal, 416 target); 417 } 418 return 0; 419 } 420 421 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 422 { 423 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 424 && (ino == USER_QUOTA_SYSTEM_INODE 425 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 426 return 0; 427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 428 && (ino == GROUP_QUOTA_SYSTEM_INODE 429 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 430 return 0; 431 return 1; 432 } 433 434 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 435 { 436 struct inode *new = NULL; 437 int status = 0; 438 int i; 439 440 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 441 if (IS_ERR(new)) { 442 status = PTR_ERR(new); 443 mlog_errno(status); 444 goto bail; 445 } 446 osb->root_inode = new; 447 448 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 449 if (IS_ERR(new)) { 450 status = PTR_ERR(new); 451 mlog_errno(status); 452 goto bail; 453 } 454 osb->sys_root_inode = new; 455 456 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 457 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 458 if (!ocfs2_need_system_inode(osb, i)) 459 continue; 460 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 461 if (!new) { 462 ocfs2_release_system_inodes(osb); 463 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 464 mlog_errno(status); 465 mlog(ML_ERROR, "Unable to load system inode %d, " 466 "possibly corrupt fs?", i); 467 goto bail; 468 } 469 // the array now has one ref, so drop this one 470 iput(new); 471 } 472 473 bail: 474 if (status) 475 mlog_errno(status); 476 return status; 477 } 478 479 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 480 { 481 struct inode *new = NULL; 482 int status = 0; 483 int i; 484 485 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 486 i < NUM_SYSTEM_INODES; 487 i++) { 488 if (!ocfs2_need_system_inode(osb, i)) 489 continue; 490 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 491 if (!new) { 492 ocfs2_release_system_inodes(osb); 493 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 494 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 495 status, i, osb->slot_num); 496 goto bail; 497 } 498 /* the array now has one ref, so drop this one */ 499 iput(new); 500 } 501 502 bail: 503 if (status) 504 mlog_errno(status); 505 return status; 506 } 507 508 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 509 { 510 int i; 511 struct inode *inode; 512 513 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 514 inode = osb->global_system_inodes[i]; 515 if (inode) { 516 iput(inode); 517 osb->global_system_inodes[i] = NULL; 518 } 519 } 520 521 inode = osb->sys_root_inode; 522 if (inode) { 523 iput(inode); 524 osb->sys_root_inode = NULL; 525 } 526 527 inode = osb->root_inode; 528 if (inode) { 529 iput(inode); 530 osb->root_inode = NULL; 531 } 532 533 if (!osb->local_system_inodes) 534 return; 535 536 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 537 if (osb->local_system_inodes[i]) { 538 iput(osb->local_system_inodes[i]); 539 osb->local_system_inodes[i] = NULL; 540 } 541 } 542 543 kfree(osb->local_system_inodes); 544 osb->local_system_inodes = NULL; 545 } 546 547 /* We're allocating fs objects, use GFP_NOFS */ 548 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 549 { 550 struct ocfs2_inode_info *oi; 551 552 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 553 if (!oi) 554 return NULL; 555 556 oi->i_sync_tid = 0; 557 oi->i_datasync_tid = 0; 558 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 559 560 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 561 return &oi->vfs_inode; 562 } 563 564 static void ocfs2_free_inode(struct inode *inode) 565 { 566 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 567 } 568 569 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 570 unsigned int cbits) 571 { 572 unsigned int bytes = 1 << cbits; 573 unsigned int trim = bytes; 574 unsigned int bitshift = 32; 575 576 /* 577 * i_size and all block offsets in ocfs2 are always 64 bits 578 * wide. i_clusters is 32 bits, in cluster-sized units. So on 579 * 64 bit platforms, cluster size will be the limiting factor. 580 */ 581 582 #if BITS_PER_LONG == 32 583 BUILD_BUG_ON(sizeof(sector_t) != 8); 584 /* 585 * We might be limited by page cache size. 586 */ 587 if (bytes > PAGE_SIZE) { 588 bytes = PAGE_SIZE; 589 trim = 1; 590 /* 591 * Shift by 31 here so that we don't get larger than 592 * MAX_LFS_FILESIZE 593 */ 594 bitshift = 31; 595 } 596 #endif 597 598 /* 599 * Trim by a whole cluster when we can actually approach the 600 * on-disk limits. Otherwise we can overflow i_clusters when 601 * an extent start is at the max offset. 602 */ 603 return (((unsigned long long)bytes) << bitshift) - trim; 604 } 605 606 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 607 { 608 int incompat_features; 609 int ret = 0; 610 struct mount_options parsed_options; 611 struct ocfs2_super *osb = OCFS2_SB(sb); 612 u32 tmp; 613 614 sync_filesystem(sb); 615 616 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 617 !ocfs2_check_set_options(sb, &parsed_options)) { 618 ret = -EINVAL; 619 goto out; 620 } 621 622 tmp = OCFS2_MOUNT_NOCLUSTER; 623 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 624 ret = -EINVAL; 625 mlog(ML_ERROR, "Cannot change nocluster option on remount\n"); 626 goto out; 627 } 628 629 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 630 OCFS2_MOUNT_HB_NONE; 631 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 632 ret = -EINVAL; 633 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 634 goto out; 635 } 636 637 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 638 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 639 ret = -EINVAL; 640 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 641 goto out; 642 } 643 644 /* Probably don't want this on remount; it might 645 * mess with other nodes */ 646 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 647 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 648 ret = -EINVAL; 649 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 650 goto out; 651 } 652 653 /* We're going to/from readonly mode. */ 654 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 655 /* Disable quota accounting before remounting RO */ 656 if (*flags & SB_RDONLY) { 657 ret = ocfs2_susp_quotas(osb, 0); 658 if (ret < 0) 659 goto out; 660 } 661 /* Lock here so the check of HARD_RO and the potential 662 * setting of SOFT_RO is atomic. */ 663 spin_lock(&osb->osb_lock); 664 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 665 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 666 ret = -EROFS; 667 goto unlock_osb; 668 } 669 670 if (*flags & SB_RDONLY) { 671 sb->s_flags |= SB_RDONLY; 672 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 673 } else { 674 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 675 mlog(ML_ERROR, "Cannot remount RDWR " 676 "filesystem due to previous errors.\n"); 677 ret = -EROFS; 678 goto unlock_osb; 679 } 680 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 681 if (incompat_features) { 682 mlog(ML_ERROR, "Cannot remount RDWR because " 683 "of unsupported optional features " 684 "(%x).\n", incompat_features); 685 ret = -EINVAL; 686 goto unlock_osb; 687 } 688 sb->s_flags &= ~SB_RDONLY; 689 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 690 } 691 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 692 unlock_osb: 693 spin_unlock(&osb->osb_lock); 694 /* Enable quota accounting after remounting RW */ 695 if (!ret && !(*flags & SB_RDONLY)) { 696 if (sb_any_quota_suspended(sb)) 697 ret = ocfs2_susp_quotas(osb, 1); 698 else 699 ret = ocfs2_enable_quotas(osb); 700 if (ret < 0) { 701 /* Return back changes... */ 702 spin_lock(&osb->osb_lock); 703 sb->s_flags |= SB_RDONLY; 704 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 705 spin_unlock(&osb->osb_lock); 706 goto out; 707 } 708 } 709 } 710 711 if (!ret) { 712 /* Only save off the new mount options in case of a successful 713 * remount. */ 714 osb->s_mount_opt = parsed_options.mount_opt; 715 osb->s_atime_quantum = parsed_options.atime_quantum; 716 osb->preferred_slot = parsed_options.slot; 717 if (parsed_options.commit_interval) 718 osb->osb_commit_interval = parsed_options.commit_interval; 719 720 if (!ocfs2_is_hard_readonly(osb)) 721 ocfs2_set_journal_params(osb); 722 723 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 724 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 725 SB_POSIXACL : 0); 726 } 727 out: 728 return ret; 729 } 730 731 static int ocfs2_sb_probe(struct super_block *sb, 732 struct buffer_head **bh, 733 int *sector_size, 734 struct ocfs2_blockcheck_stats *stats) 735 { 736 int status, tmpstat; 737 struct ocfs1_vol_disk_hdr *hdr; 738 struct ocfs2_dinode *di; 739 int blksize; 740 741 *bh = NULL; 742 743 /* may be > 512 */ 744 *sector_size = bdev_logical_block_size(sb->s_bdev); 745 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 746 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 747 *sector_size, OCFS2_MAX_BLOCKSIZE); 748 status = -EINVAL; 749 goto bail; 750 } 751 752 /* Can this really happen? */ 753 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 754 *sector_size = OCFS2_MIN_BLOCKSIZE; 755 756 /* check block zero for old format */ 757 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 758 if (status < 0) { 759 mlog_errno(status); 760 goto bail; 761 } 762 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 763 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 764 mlog(ML_ERROR, "incompatible version: %u.%u\n", 765 hdr->major_version, hdr->minor_version); 766 status = -EINVAL; 767 } 768 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 769 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 770 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 771 hdr->signature); 772 status = -EINVAL; 773 } 774 brelse(*bh); 775 *bh = NULL; 776 if (status < 0) { 777 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 778 "upgraded before mounting with ocfs v2\n"); 779 goto bail; 780 } 781 782 /* 783 * Now check at magic offset for 512, 1024, 2048, 4096 784 * blocksizes. 4096 is the maximum blocksize because it is 785 * the minimum clustersize. 786 */ 787 status = -EINVAL; 788 for (blksize = *sector_size; 789 blksize <= OCFS2_MAX_BLOCKSIZE; 790 blksize <<= 1) { 791 tmpstat = ocfs2_get_sector(sb, bh, 792 OCFS2_SUPER_BLOCK_BLKNO, 793 blksize); 794 if (tmpstat < 0) { 795 status = tmpstat; 796 mlog_errno(status); 797 break; 798 } 799 di = (struct ocfs2_dinode *) (*bh)->b_data; 800 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 801 spin_lock_init(&stats->b_lock); 802 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 803 if (tmpstat < 0) { 804 brelse(*bh); 805 *bh = NULL; 806 } 807 if (tmpstat != -EAGAIN) { 808 status = tmpstat; 809 break; 810 } 811 } 812 813 bail: 814 return status; 815 } 816 817 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 818 { 819 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 820 821 if (osb->s_mount_opt & hb_enabled) { 822 if (ocfs2_mount_local(osb)) { 823 mlog(ML_ERROR, "Cannot heartbeat on a locally " 824 "mounted device.\n"); 825 return -EINVAL; 826 } 827 if (ocfs2_userspace_stack(osb)) { 828 mlog(ML_ERROR, "Userspace stack expected, but " 829 "o2cb heartbeat arguments passed to mount\n"); 830 return -EINVAL; 831 } 832 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 833 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 834 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 835 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 836 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 837 return -EINVAL; 838 } 839 } 840 841 if (!(osb->s_mount_opt & hb_enabled)) { 842 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 843 !ocfs2_userspace_stack(osb)) { 844 mlog(ML_ERROR, "Heartbeat has to be started to mount " 845 "a read-write clustered device.\n"); 846 return -EINVAL; 847 } 848 } 849 850 return 0; 851 } 852 853 /* 854 * If we're using a userspace stack, mount should have passed 855 * a name that matches the disk. If not, mount should not 856 * have passed a stack. 857 */ 858 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 859 struct mount_options *mopt) 860 { 861 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 862 mlog(ML_ERROR, 863 "cluster stack passed to mount, but this filesystem " 864 "does not support it\n"); 865 return -EINVAL; 866 } 867 868 if (ocfs2_userspace_stack(osb) && 869 !(osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) && 870 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 871 OCFS2_STACK_LABEL_LEN)) { 872 mlog(ML_ERROR, 873 "cluster stack passed to mount (\"%s\") does not " 874 "match the filesystem (\"%s\")\n", 875 mopt->cluster_stack, 876 osb->osb_cluster_stack); 877 return -EINVAL; 878 } 879 880 return 0; 881 } 882 883 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 884 { 885 int type; 886 struct super_block *sb = osb->sb; 887 unsigned int feature[OCFS2_MAXQUOTAS] = { 888 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 889 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 890 int status = 0; 891 892 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 893 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 894 continue; 895 if (unsuspend) 896 status = dquot_resume(sb, type); 897 else { 898 struct ocfs2_mem_dqinfo *oinfo; 899 900 /* Cancel periodic syncing before suspending */ 901 oinfo = sb_dqinfo(sb, type)->dqi_priv; 902 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 903 status = dquot_suspend(sb, type); 904 } 905 if (status < 0) 906 break; 907 } 908 if (status < 0) 909 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 910 "remount (error = %d).\n", status); 911 return status; 912 } 913 914 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 915 { 916 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 917 struct super_block *sb = osb->sb; 918 unsigned int feature[OCFS2_MAXQUOTAS] = { 919 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 920 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 921 unsigned int ino[OCFS2_MAXQUOTAS] = { 922 LOCAL_USER_QUOTA_SYSTEM_INODE, 923 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 924 int status; 925 int type; 926 927 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 928 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 929 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 930 continue; 931 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 932 osb->slot_num); 933 if (!inode[type]) { 934 status = -ENOENT; 935 goto out_quota_off; 936 } 937 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2, 938 DQUOT_USAGE_ENABLED); 939 if (status < 0) 940 goto out_quota_off; 941 } 942 943 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 944 iput(inode[type]); 945 return 0; 946 out_quota_off: 947 ocfs2_disable_quotas(osb); 948 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 949 iput(inode[type]); 950 mlog_errno(status); 951 return status; 952 } 953 954 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 955 { 956 int type; 957 struct inode *inode; 958 struct super_block *sb = osb->sb; 959 struct ocfs2_mem_dqinfo *oinfo; 960 961 /* We mostly ignore errors in this function because there's not much 962 * we can do when we see them */ 963 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 964 if (!sb_has_quota_loaded(sb, type)) 965 continue; 966 oinfo = sb_dqinfo(sb, type)->dqi_priv; 967 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 968 inode = igrab(sb->s_dquot.files[type]); 969 /* Turn off quotas. This will remove all dquot structures from 970 * memory and so they will be automatically synced to global 971 * quota files */ 972 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 973 DQUOT_LIMITS_ENABLED); 974 iput(inode); 975 } 976 } 977 978 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 979 { 980 struct dentry *root; 981 int status, sector_size; 982 struct mount_options parsed_options; 983 struct inode *inode = NULL; 984 struct ocfs2_super *osb = NULL; 985 struct buffer_head *bh = NULL; 986 char nodestr[12]; 987 struct ocfs2_blockcheck_stats stats; 988 989 trace_ocfs2_fill_super(sb, data, silent); 990 991 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 992 status = -EINVAL; 993 goto read_super_error; 994 } 995 996 /* probe for superblock */ 997 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 998 if (status < 0) { 999 mlog(ML_ERROR, "superblock probe failed!\n"); 1000 goto read_super_error; 1001 } 1002 1003 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1004 osb = OCFS2_SB(sb); 1005 if (status < 0) { 1006 mlog_errno(status); 1007 goto read_super_error; 1008 } 1009 brelse(bh); 1010 bh = NULL; 1011 1012 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1013 status = -EINVAL; 1014 goto read_super_error; 1015 } 1016 osb->s_mount_opt = parsed_options.mount_opt; 1017 osb->s_atime_quantum = parsed_options.atime_quantum; 1018 osb->preferred_slot = parsed_options.slot; 1019 osb->osb_commit_interval = parsed_options.commit_interval; 1020 1021 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1022 osb->osb_resv_level = parsed_options.resv_level; 1023 osb->osb_dir_resv_level = parsed_options.resv_level; 1024 if (parsed_options.dir_resv_level == -1) 1025 osb->osb_dir_resv_level = parsed_options.resv_level; 1026 else 1027 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1028 1029 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1030 if (status) 1031 goto read_super_error; 1032 1033 sb->s_magic = OCFS2_SUPER_MAGIC; 1034 1035 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) | 1036 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0); 1037 1038 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY, 1039 * heartbeat=none */ 1040 if (bdev_read_only(sb->s_bdev)) { 1041 if (!sb_rdonly(sb)) { 1042 status = -EACCES; 1043 mlog(ML_ERROR, "Readonly device detected but readonly " 1044 "mount was not specified.\n"); 1045 goto read_super_error; 1046 } 1047 1048 /* You should not be able to start a local heartbeat 1049 * on a readonly device. */ 1050 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1051 status = -EROFS; 1052 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1053 "device.\n"); 1054 goto read_super_error; 1055 } 1056 1057 status = ocfs2_check_journals_nolocks(osb); 1058 if (status < 0) { 1059 if (status == -EROFS) 1060 mlog(ML_ERROR, "Recovery required on readonly " 1061 "file system, but write access is " 1062 "unavailable.\n"); 1063 else 1064 mlog_errno(status); 1065 goto read_super_error; 1066 } 1067 1068 ocfs2_set_ro_flag(osb, 1); 1069 1070 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1071 "Cluster services will not be used for this mount. " 1072 "Recovery will be skipped.\n", osb->dev_str); 1073 } 1074 1075 if (!ocfs2_is_hard_readonly(osb)) { 1076 if (sb_rdonly(sb)) 1077 ocfs2_set_ro_flag(osb, 0); 1078 } 1079 1080 status = ocfs2_verify_heartbeat(osb); 1081 if (status < 0) { 1082 mlog_errno(status); 1083 goto read_super_error; 1084 } 1085 1086 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1087 ocfs2_debugfs_root); 1088 1089 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root, 1090 osb, &ocfs2_osb_debug_fops); 1091 1092 if (ocfs2_meta_ecc(osb)) 1093 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats, 1094 osb->osb_debug_root); 1095 1096 status = ocfs2_mount_volume(sb); 1097 if (status < 0) 1098 goto read_super_error; 1099 1100 if (osb->root_inode) 1101 inode = igrab(osb->root_inode); 1102 1103 if (!inode) { 1104 status = -EIO; 1105 mlog_errno(status); 1106 goto read_super_error; 1107 } 1108 1109 root = d_make_root(inode); 1110 if (!root) { 1111 status = -ENOMEM; 1112 mlog_errno(status); 1113 goto read_super_error; 1114 } 1115 1116 sb->s_root = root; 1117 1118 ocfs2_complete_mount_recovery(osb); 1119 1120 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL, 1121 &ocfs2_kset->kobj); 1122 if (!osb->osb_dev_kset) { 1123 status = -ENOMEM; 1124 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id); 1125 goto read_super_error; 1126 } 1127 1128 /* Create filecheck sysfs related directories/files at 1129 * /sys/fs/ocfs2/<devname>/filecheck */ 1130 if (ocfs2_filecheck_create_sysfs(osb)) { 1131 status = -ENOMEM; 1132 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at " 1133 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id); 1134 goto read_super_error; 1135 } 1136 1137 if (ocfs2_mount_local(osb)) 1138 snprintf(nodestr, sizeof(nodestr), "local"); 1139 else 1140 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1141 1142 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1143 "with %s data mode.\n", 1144 osb->dev_str, nodestr, osb->slot_num, 1145 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1146 "ordered"); 1147 1148 if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) && 1149 !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT)) 1150 printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted " 1151 "without cluster aware mode.\n", osb->dev_str); 1152 1153 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1154 wake_up(&osb->osb_mount_event); 1155 1156 /* Now we can initialize quotas because we can afford to wait 1157 * for cluster locks recovery now. That also means that truncation 1158 * log recovery can happen but that waits for proper quota setup */ 1159 if (!sb_rdonly(sb)) { 1160 status = ocfs2_enable_quotas(osb); 1161 if (status < 0) { 1162 /* We have to err-out specially here because 1163 * s_root is already set */ 1164 mlog_errno(status); 1165 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1166 wake_up(&osb->osb_mount_event); 1167 return status; 1168 } 1169 } 1170 1171 ocfs2_complete_quota_recovery(osb); 1172 1173 /* Now we wake up again for processes waiting for quotas */ 1174 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1175 wake_up(&osb->osb_mount_event); 1176 1177 /* Start this when the mount is almost sure of being successful */ 1178 ocfs2_orphan_scan_start(osb); 1179 1180 return status; 1181 1182 read_super_error: 1183 brelse(bh); 1184 1185 if (status) 1186 mlog_errno(status); 1187 1188 if (osb) { 1189 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1190 wake_up(&osb->osb_mount_event); 1191 ocfs2_dismount_volume(sb, 1); 1192 } 1193 1194 return status; 1195 } 1196 1197 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1198 int flags, 1199 const char *dev_name, 1200 void *data) 1201 { 1202 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1203 } 1204 1205 static struct file_system_type ocfs2_fs_type = { 1206 .owner = THIS_MODULE, 1207 .name = "ocfs2", 1208 .mount = ocfs2_mount, 1209 .kill_sb = kill_block_super, 1210 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1211 .next = NULL 1212 }; 1213 MODULE_ALIAS_FS("ocfs2"); 1214 1215 static int ocfs2_check_set_options(struct super_block *sb, 1216 struct mount_options *options) 1217 { 1218 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1219 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1220 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1221 mlog(ML_ERROR, "User quotas were requested, but this " 1222 "filesystem does not have the feature enabled.\n"); 1223 return 0; 1224 } 1225 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1226 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1227 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1228 mlog(ML_ERROR, "Group quotas were requested, but this " 1229 "filesystem does not have the feature enabled.\n"); 1230 return 0; 1231 } 1232 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1233 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1234 mlog(ML_ERROR, "ACL support requested but extended attributes " 1235 "feature is not enabled\n"); 1236 return 0; 1237 } 1238 /* No ACL setting specified? Use XATTR feature... */ 1239 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1240 OCFS2_MOUNT_NO_POSIX_ACL))) { 1241 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1242 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1243 else 1244 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1245 } 1246 return 1; 1247 } 1248 1249 static int ocfs2_parse_options(struct super_block *sb, 1250 char *options, 1251 struct mount_options *mopt, 1252 int is_remount) 1253 { 1254 int status, user_stack = 0; 1255 char *p; 1256 u32 tmp; 1257 int token, option; 1258 substring_t args[MAX_OPT_ARGS]; 1259 1260 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1261 1262 mopt->commit_interval = 0; 1263 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1264 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1265 mopt->slot = OCFS2_INVALID_SLOT; 1266 mopt->localalloc_opt = -1; 1267 mopt->cluster_stack[0] = '\0'; 1268 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1269 mopt->dir_resv_level = -1; 1270 1271 if (!options) { 1272 status = 1; 1273 goto bail; 1274 } 1275 1276 while ((p = strsep(&options, ",")) != NULL) { 1277 if (!*p) 1278 continue; 1279 1280 token = match_token(p, tokens, args); 1281 switch (token) { 1282 case Opt_hb_local: 1283 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1284 break; 1285 case Opt_hb_none: 1286 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1287 break; 1288 case Opt_hb_global: 1289 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1290 break; 1291 case Opt_barrier: 1292 if (match_int(&args[0], &option)) { 1293 status = 0; 1294 goto bail; 1295 } 1296 if (option) 1297 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1298 else 1299 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1300 break; 1301 case Opt_intr: 1302 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1303 break; 1304 case Opt_nointr: 1305 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1306 break; 1307 case Opt_err_panic: 1308 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1309 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1310 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1311 break; 1312 case Opt_err_ro: 1313 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1314 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1315 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1316 break; 1317 case Opt_err_cont: 1318 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1319 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1320 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1321 break; 1322 case Opt_data_ordered: 1323 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1324 break; 1325 case Opt_data_writeback: 1326 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1327 break; 1328 case Opt_user_xattr: 1329 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1330 break; 1331 case Opt_nouser_xattr: 1332 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1333 break; 1334 case Opt_atime_quantum: 1335 if (match_int(&args[0], &option)) { 1336 status = 0; 1337 goto bail; 1338 } 1339 if (option >= 0) 1340 mopt->atime_quantum = option; 1341 break; 1342 case Opt_slot: 1343 if (match_int(&args[0], &option)) { 1344 status = 0; 1345 goto bail; 1346 } 1347 if (option) 1348 mopt->slot = (u16)option; 1349 break; 1350 case Opt_commit: 1351 if (match_int(&args[0], &option)) { 1352 status = 0; 1353 goto bail; 1354 } 1355 if (option < 0) 1356 return 0; 1357 if (option == 0) 1358 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1359 mopt->commit_interval = HZ * option; 1360 break; 1361 case Opt_localalloc: 1362 if (match_int(&args[0], &option)) { 1363 status = 0; 1364 goto bail; 1365 } 1366 if (option >= 0) 1367 mopt->localalloc_opt = option; 1368 break; 1369 case Opt_localflocks: 1370 /* 1371 * Changing this during remount could race 1372 * flock() requests, or "unbalance" existing 1373 * ones (e.g., a lock is taken in one mode but 1374 * dropped in the other). If users care enough 1375 * to flip locking modes during remount, we 1376 * could add a "local" flag to individual 1377 * flock structures for proper tracking of 1378 * state. 1379 */ 1380 if (!is_remount) 1381 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1382 break; 1383 case Opt_stack: 1384 /* Check both that the option we were passed 1385 * is of the right length and that it is a proper 1386 * string of the right length. 1387 */ 1388 if (((args[0].to - args[0].from) != 1389 OCFS2_STACK_LABEL_LEN) || 1390 (strnlen(args[0].from, 1391 OCFS2_STACK_LABEL_LEN) != 1392 OCFS2_STACK_LABEL_LEN)) { 1393 mlog(ML_ERROR, 1394 "Invalid cluster_stack option\n"); 1395 status = 0; 1396 goto bail; 1397 } 1398 memcpy(mopt->cluster_stack, args[0].from, 1399 OCFS2_STACK_LABEL_LEN); 1400 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1401 /* 1402 * Open code the memcmp here as we don't have 1403 * an osb to pass to 1404 * ocfs2_userspace_stack(). 1405 */ 1406 if (memcmp(mopt->cluster_stack, 1407 OCFS2_CLASSIC_CLUSTER_STACK, 1408 OCFS2_STACK_LABEL_LEN)) 1409 user_stack = 1; 1410 break; 1411 case Opt_inode64: 1412 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1413 break; 1414 case Opt_usrquota: 1415 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1416 break; 1417 case Opt_grpquota: 1418 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1419 break; 1420 case Opt_coherency_buffered: 1421 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1422 break; 1423 case Opt_coherency_full: 1424 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1425 break; 1426 case Opt_acl: 1427 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1428 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1429 break; 1430 case Opt_noacl: 1431 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1432 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1433 break; 1434 case Opt_resv_level: 1435 if (is_remount) 1436 break; 1437 if (match_int(&args[0], &option)) { 1438 status = 0; 1439 goto bail; 1440 } 1441 if (option >= OCFS2_MIN_RESV_LEVEL && 1442 option < OCFS2_MAX_RESV_LEVEL) 1443 mopt->resv_level = option; 1444 break; 1445 case Opt_dir_resv_level: 1446 if (is_remount) 1447 break; 1448 if (match_int(&args[0], &option)) { 1449 status = 0; 1450 goto bail; 1451 } 1452 if (option >= OCFS2_MIN_RESV_LEVEL && 1453 option < OCFS2_MAX_RESV_LEVEL) 1454 mopt->dir_resv_level = option; 1455 break; 1456 case Opt_journal_async_commit: 1457 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1458 break; 1459 case Opt_nocluster: 1460 mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER; 1461 break; 1462 default: 1463 mlog(ML_ERROR, 1464 "Unrecognized mount option \"%s\" " 1465 "or missing value\n", p); 1466 status = 0; 1467 goto bail; 1468 } 1469 } 1470 1471 if (user_stack == 0) { 1472 /* Ensure only one heartbeat mode */ 1473 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1474 OCFS2_MOUNT_HB_GLOBAL | 1475 OCFS2_MOUNT_HB_NONE); 1476 if (hweight32(tmp) != 1) { 1477 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1478 status = 0; 1479 goto bail; 1480 } 1481 } 1482 1483 status = 1; 1484 1485 bail: 1486 return status; 1487 } 1488 1489 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1490 { 1491 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1492 unsigned long opts = osb->s_mount_opt; 1493 unsigned int local_alloc_megs; 1494 1495 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1496 seq_printf(s, ",_netdev"); 1497 if (opts & OCFS2_MOUNT_HB_LOCAL) 1498 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1499 else 1500 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1501 } else 1502 seq_printf(s, ",%s", OCFS2_HB_NONE); 1503 1504 if (opts & OCFS2_MOUNT_NOINTR) 1505 seq_printf(s, ",nointr"); 1506 1507 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1508 seq_printf(s, ",data=writeback"); 1509 else 1510 seq_printf(s, ",data=ordered"); 1511 1512 if (opts & OCFS2_MOUNT_BARRIER) 1513 seq_printf(s, ",barrier=1"); 1514 1515 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1516 seq_printf(s, ",errors=panic"); 1517 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1518 seq_printf(s, ",errors=continue"); 1519 else 1520 seq_printf(s, ",errors=remount-ro"); 1521 1522 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1523 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1524 1525 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1526 1527 if (osb->osb_commit_interval) 1528 seq_printf(s, ",commit=%u", 1529 (unsigned) (osb->osb_commit_interval / HZ)); 1530 1531 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1532 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1533 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1534 1535 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1536 seq_printf(s, ",localflocks,"); 1537 1538 if (osb->osb_cluster_stack[0]) 1539 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1540 OCFS2_STACK_LABEL_LEN); 1541 if (opts & OCFS2_MOUNT_USRQUOTA) 1542 seq_printf(s, ",usrquota"); 1543 if (opts & OCFS2_MOUNT_GRPQUOTA) 1544 seq_printf(s, ",grpquota"); 1545 1546 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1547 seq_printf(s, ",coherency=buffered"); 1548 else 1549 seq_printf(s, ",coherency=full"); 1550 1551 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1552 seq_printf(s, ",nouser_xattr"); 1553 else 1554 seq_printf(s, ",user_xattr"); 1555 1556 if (opts & OCFS2_MOUNT_INODE64) 1557 seq_printf(s, ",inode64"); 1558 1559 if (opts & OCFS2_MOUNT_POSIX_ACL) 1560 seq_printf(s, ",acl"); 1561 else 1562 seq_printf(s, ",noacl"); 1563 1564 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1565 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1566 1567 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1568 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1569 1570 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1571 seq_printf(s, ",journal_async_commit"); 1572 1573 if (opts & OCFS2_MOUNT_NOCLUSTER) 1574 seq_printf(s, ",nocluster"); 1575 1576 return 0; 1577 } 1578 1579 static int __init ocfs2_init(void) 1580 { 1581 int status; 1582 1583 status = init_ocfs2_uptodate_cache(); 1584 if (status < 0) 1585 goto out1; 1586 1587 status = ocfs2_initialize_mem_caches(); 1588 if (status < 0) 1589 goto out2; 1590 1591 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1592 1593 ocfs2_set_locking_protocol(); 1594 1595 status = register_quota_format(&ocfs2_quota_format); 1596 if (status < 0) 1597 goto out3; 1598 status = register_filesystem(&ocfs2_fs_type); 1599 if (!status) 1600 return 0; 1601 1602 unregister_quota_format(&ocfs2_quota_format); 1603 out3: 1604 debugfs_remove(ocfs2_debugfs_root); 1605 ocfs2_free_mem_caches(); 1606 out2: 1607 exit_ocfs2_uptodate_cache(); 1608 out1: 1609 mlog_errno(status); 1610 return status; 1611 } 1612 1613 static void __exit ocfs2_exit(void) 1614 { 1615 unregister_quota_format(&ocfs2_quota_format); 1616 1617 debugfs_remove(ocfs2_debugfs_root); 1618 1619 ocfs2_free_mem_caches(); 1620 1621 unregister_filesystem(&ocfs2_fs_type); 1622 1623 exit_ocfs2_uptodate_cache(); 1624 } 1625 1626 static void ocfs2_put_super(struct super_block *sb) 1627 { 1628 trace_ocfs2_put_super(sb); 1629 1630 ocfs2_sync_blockdev(sb); 1631 ocfs2_dismount_volume(sb, 0); 1632 } 1633 1634 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1635 { 1636 struct ocfs2_super *osb; 1637 u32 numbits, freebits; 1638 int status; 1639 struct ocfs2_dinode *bm_lock; 1640 struct buffer_head *bh = NULL; 1641 struct inode *inode = NULL; 1642 1643 trace_ocfs2_statfs(dentry->d_sb, buf); 1644 1645 osb = OCFS2_SB(dentry->d_sb); 1646 1647 inode = ocfs2_get_system_file_inode(osb, 1648 GLOBAL_BITMAP_SYSTEM_INODE, 1649 OCFS2_INVALID_SLOT); 1650 if (!inode) { 1651 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1652 status = -EIO; 1653 goto bail; 1654 } 1655 1656 status = ocfs2_inode_lock(inode, &bh, 0); 1657 if (status < 0) { 1658 mlog_errno(status); 1659 goto bail; 1660 } 1661 1662 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1663 1664 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1665 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1666 1667 buf->f_type = OCFS2_SUPER_MAGIC; 1668 buf->f_bsize = dentry->d_sb->s_blocksize; 1669 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1670 buf->f_blocks = ((sector_t) numbits) * 1671 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1672 buf->f_bfree = ((sector_t) freebits) * 1673 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1674 buf->f_bavail = buf->f_bfree; 1675 buf->f_files = numbits; 1676 buf->f_ffree = freebits; 1677 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1678 & 0xFFFFFFFFUL; 1679 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1680 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1681 1682 brelse(bh); 1683 1684 ocfs2_inode_unlock(inode, 0); 1685 status = 0; 1686 bail: 1687 iput(inode); 1688 1689 if (status) 1690 mlog_errno(status); 1691 1692 return status; 1693 } 1694 1695 static void ocfs2_inode_init_once(void *data) 1696 { 1697 struct ocfs2_inode_info *oi = data; 1698 1699 oi->ip_flags = 0; 1700 oi->ip_open_count = 0; 1701 spin_lock_init(&oi->ip_lock); 1702 ocfs2_extent_map_init(&oi->vfs_inode); 1703 INIT_LIST_HEAD(&oi->ip_io_markers); 1704 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1705 oi->ip_dir_start_lookup = 0; 1706 init_rwsem(&oi->ip_alloc_sem); 1707 init_rwsem(&oi->ip_xattr_sem); 1708 mutex_init(&oi->ip_io_mutex); 1709 1710 oi->ip_blkno = 0ULL; 1711 oi->ip_clusters = 0; 1712 oi->ip_next_orphan = NULL; 1713 1714 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1715 1716 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1717 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1718 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1719 1720 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1721 &ocfs2_inode_caching_ops); 1722 1723 inode_init_once(&oi->vfs_inode); 1724 } 1725 1726 static int ocfs2_initialize_mem_caches(void) 1727 { 1728 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1729 sizeof(struct ocfs2_inode_info), 1730 0, 1731 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1732 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1733 ocfs2_inode_init_once); 1734 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1735 sizeof(struct ocfs2_dquot), 1736 0, 1737 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1738 SLAB_MEM_SPREAD), 1739 NULL); 1740 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1741 sizeof(struct ocfs2_quota_chunk), 1742 0, 1743 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1744 NULL); 1745 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1746 !ocfs2_qf_chunk_cachep) { 1747 kmem_cache_destroy(ocfs2_inode_cachep); 1748 kmem_cache_destroy(ocfs2_dquot_cachep); 1749 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1750 return -ENOMEM; 1751 } 1752 1753 return 0; 1754 } 1755 1756 static void ocfs2_free_mem_caches(void) 1757 { 1758 /* 1759 * Make sure all delayed rcu free inodes are flushed before we 1760 * destroy cache. 1761 */ 1762 rcu_barrier(); 1763 kmem_cache_destroy(ocfs2_inode_cachep); 1764 ocfs2_inode_cachep = NULL; 1765 1766 kmem_cache_destroy(ocfs2_dquot_cachep); 1767 ocfs2_dquot_cachep = NULL; 1768 1769 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1770 ocfs2_qf_chunk_cachep = NULL; 1771 } 1772 1773 static int ocfs2_get_sector(struct super_block *sb, 1774 struct buffer_head **bh, 1775 int block, 1776 int sect_size) 1777 { 1778 if (!sb_set_blocksize(sb, sect_size)) { 1779 mlog(ML_ERROR, "unable to set blocksize\n"); 1780 return -EIO; 1781 } 1782 1783 *bh = sb_getblk(sb, block); 1784 if (!*bh) { 1785 mlog_errno(-ENOMEM); 1786 return -ENOMEM; 1787 } 1788 lock_buffer(*bh); 1789 if (!buffer_dirty(*bh)) 1790 clear_buffer_uptodate(*bh); 1791 unlock_buffer(*bh); 1792 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1793 wait_on_buffer(*bh); 1794 if (!buffer_uptodate(*bh)) { 1795 mlog_errno(-EIO); 1796 brelse(*bh); 1797 *bh = NULL; 1798 return -EIO; 1799 } 1800 1801 return 0; 1802 } 1803 1804 static int ocfs2_mount_volume(struct super_block *sb) 1805 { 1806 int status = 0; 1807 int unlock_super = 0; 1808 struct ocfs2_super *osb = OCFS2_SB(sb); 1809 1810 if (ocfs2_is_hard_readonly(osb)) 1811 goto leave; 1812 1813 mutex_init(&osb->obs_trim_fs_mutex); 1814 1815 status = ocfs2_dlm_init(osb); 1816 if (status < 0) { 1817 mlog_errno(status); 1818 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1819 mlog(ML_ERROR, "couldn't mount because cluster name on" 1820 " disk does not match the running cluster name.\n"); 1821 goto leave; 1822 } 1823 1824 status = ocfs2_super_lock(osb, 1); 1825 if (status < 0) { 1826 mlog_errno(status); 1827 goto leave; 1828 } 1829 unlock_super = 1; 1830 1831 /* This will load up the node map and add ourselves to it. */ 1832 status = ocfs2_find_slot(osb); 1833 if (status < 0) { 1834 mlog_errno(status); 1835 goto leave; 1836 } 1837 1838 /* load all node-local system inodes */ 1839 status = ocfs2_init_local_system_inodes(osb); 1840 if (status < 0) { 1841 mlog_errno(status); 1842 goto leave; 1843 } 1844 1845 status = ocfs2_check_volume(osb); 1846 if (status < 0) { 1847 mlog_errno(status); 1848 goto leave; 1849 } 1850 1851 status = ocfs2_truncate_log_init(osb); 1852 if (status < 0) 1853 mlog_errno(status); 1854 1855 leave: 1856 if (unlock_super) 1857 ocfs2_super_unlock(osb, 1); 1858 1859 return status; 1860 } 1861 1862 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1863 { 1864 int tmp, hangup_needed = 0; 1865 struct ocfs2_super *osb = NULL; 1866 char nodestr[12]; 1867 1868 trace_ocfs2_dismount_volume(sb); 1869 1870 BUG_ON(!sb); 1871 osb = OCFS2_SB(sb); 1872 BUG_ON(!osb); 1873 1874 /* Remove file check sysfs related directores/files, 1875 * and wait for the pending file check operations */ 1876 ocfs2_filecheck_remove_sysfs(osb); 1877 1878 kset_unregister(osb->osb_dev_kset); 1879 1880 /* Orphan scan should be stopped as early as possible */ 1881 ocfs2_orphan_scan_stop(osb); 1882 1883 ocfs2_disable_quotas(osb); 1884 1885 /* All dquots should be freed by now */ 1886 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1887 /* Wait for worker to be done with the work structure in osb */ 1888 cancel_work_sync(&osb->dquot_drop_work); 1889 1890 ocfs2_shutdown_local_alloc(osb); 1891 1892 ocfs2_truncate_log_shutdown(osb); 1893 1894 /* This will disable recovery and flush any recovery work. */ 1895 ocfs2_recovery_exit(osb); 1896 1897 ocfs2_sync_blockdev(sb); 1898 1899 ocfs2_purge_refcount_trees(osb); 1900 1901 /* No cluster connection means we've failed during mount, so skip 1902 * all the steps which depended on that to complete. */ 1903 if (osb->cconn) { 1904 tmp = ocfs2_super_lock(osb, 1); 1905 if (tmp < 0) { 1906 mlog_errno(tmp); 1907 return; 1908 } 1909 } 1910 1911 if (osb->slot_num != OCFS2_INVALID_SLOT) 1912 ocfs2_put_slot(osb); 1913 1914 if (osb->cconn) 1915 ocfs2_super_unlock(osb, 1); 1916 1917 ocfs2_release_system_inodes(osb); 1918 1919 ocfs2_journal_shutdown(osb); 1920 1921 /* 1922 * If we're dismounting due to mount error, mount.ocfs2 will clean 1923 * up heartbeat. If we're a local mount, there is no heartbeat. 1924 * If we failed before we got a uuid_str yet, we can't stop 1925 * heartbeat. Otherwise, do it. 1926 */ 1927 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1928 !ocfs2_is_hard_readonly(osb)) 1929 hangup_needed = 1; 1930 1931 if (osb->cconn) 1932 ocfs2_dlm_shutdown(osb, hangup_needed); 1933 1934 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1935 debugfs_remove_recursive(osb->osb_debug_root); 1936 1937 if (hangup_needed) 1938 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1939 1940 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1941 1942 if (ocfs2_mount_local(osb)) 1943 snprintf(nodestr, sizeof(nodestr), "local"); 1944 else 1945 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1946 1947 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1948 osb->dev_str, nodestr); 1949 1950 ocfs2_delete_osb(osb); 1951 kfree(osb); 1952 sb->s_dev = 0; 1953 sb->s_fs_info = NULL; 1954 } 1955 1956 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1957 unsigned uuid_bytes) 1958 { 1959 int i, ret; 1960 char *ptr; 1961 1962 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1963 1964 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1965 if (osb->uuid_str == NULL) 1966 return -ENOMEM; 1967 1968 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1969 /* print with null */ 1970 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1971 if (ret != 2) /* drop super cleans up */ 1972 return -EINVAL; 1973 /* then only advance past the last char */ 1974 ptr += 2; 1975 } 1976 1977 return 0; 1978 } 1979 1980 /* Make sure entire volume is addressable by our journal. Requires 1981 osb_clusters_at_boot to be valid and for the journal to have been 1982 initialized by ocfs2_journal_init(). */ 1983 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 1984 { 1985 int status = 0; 1986 u64 max_block = 1987 ocfs2_clusters_to_blocks(osb->sb, 1988 osb->osb_clusters_at_boot) - 1; 1989 1990 /* 32-bit block number is always OK. */ 1991 if (max_block <= (u32)~0ULL) 1992 goto out; 1993 1994 /* Volume is "huge", so see if our journal is new enough to 1995 support it. */ 1996 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 1997 OCFS2_FEATURE_COMPAT_JBD2_SB) && 1998 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 1999 JBD2_FEATURE_INCOMPAT_64BIT))) { 2000 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2001 "Enable the 'block64' journal option with tunefs.ocfs2"); 2002 status = -EFBIG; 2003 goto out; 2004 } 2005 2006 out: 2007 return status; 2008 } 2009 2010 static int ocfs2_initialize_super(struct super_block *sb, 2011 struct buffer_head *bh, 2012 int sector_size, 2013 struct ocfs2_blockcheck_stats *stats) 2014 { 2015 int status; 2016 int i, cbits, bbits; 2017 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2018 struct inode *inode = NULL; 2019 struct ocfs2_super *osb; 2020 u64 total_blocks; 2021 2022 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2023 if (!osb) { 2024 status = -ENOMEM; 2025 mlog_errno(status); 2026 goto bail; 2027 } 2028 2029 sb->s_fs_info = osb; 2030 sb->s_op = &ocfs2_sops; 2031 sb->s_d_op = &ocfs2_dentry_ops; 2032 sb->s_export_op = &ocfs2_export_ops; 2033 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2034 sb->dq_op = &ocfs2_quota_operations; 2035 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2036 sb->s_xattr = ocfs2_xattr_handlers; 2037 sb->s_time_gran = 1; 2038 sb->s_flags |= SB_NOATIME; 2039 /* this is needed to support O_LARGEFILE */ 2040 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2041 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2042 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2043 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid, 2044 sizeof(di->id2.i_super.s_uuid)); 2045 2046 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2047 2048 for (i = 0; i < 3; i++) 2049 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2050 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2051 2052 osb->sb = sb; 2053 osb->s_sectsize_bits = blksize_bits(sector_size); 2054 BUG_ON(!osb->s_sectsize_bits); 2055 2056 spin_lock_init(&osb->dc_task_lock); 2057 init_waitqueue_head(&osb->dc_event); 2058 osb->dc_work_sequence = 0; 2059 osb->dc_wake_sequence = 0; 2060 INIT_LIST_HEAD(&osb->blocked_lock_list); 2061 osb->blocked_lock_count = 0; 2062 spin_lock_init(&osb->osb_lock); 2063 spin_lock_init(&osb->osb_xattr_lock); 2064 ocfs2_init_steal_slots(osb); 2065 2066 mutex_init(&osb->system_file_mutex); 2067 2068 atomic_set(&osb->alloc_stats.moves, 0); 2069 atomic_set(&osb->alloc_stats.local_data, 0); 2070 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2071 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2072 atomic_set(&osb->alloc_stats.bg_extends, 0); 2073 2074 /* Copy the blockcheck stats from the superblock probe */ 2075 osb->osb_ecc_stats = *stats; 2076 2077 ocfs2_init_node_maps(osb); 2078 2079 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2080 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2081 2082 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2083 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2084 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2085 osb->max_slots); 2086 status = -EINVAL; 2087 goto bail; 2088 } 2089 2090 ocfs2_orphan_scan_init(osb); 2091 2092 status = ocfs2_recovery_init(osb); 2093 if (status) { 2094 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2095 mlog_errno(status); 2096 goto bail; 2097 } 2098 2099 init_waitqueue_head(&osb->checkpoint_event); 2100 2101 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2102 2103 osb->slot_num = OCFS2_INVALID_SLOT; 2104 2105 osb->s_xattr_inline_size = le16_to_cpu( 2106 di->id2.i_super.s_xattr_inline_size); 2107 2108 osb->local_alloc_state = OCFS2_LA_UNUSED; 2109 osb->local_alloc_bh = NULL; 2110 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2111 2112 init_waitqueue_head(&osb->osb_mount_event); 2113 2114 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2115 if (status) { 2116 mlog_errno(status); 2117 goto bail; 2118 } 2119 2120 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2121 if (!osb->vol_label) { 2122 mlog(ML_ERROR, "unable to alloc vol label\n"); 2123 status = -ENOMEM; 2124 goto bail; 2125 } 2126 2127 osb->slot_recovery_generations = 2128 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2129 GFP_KERNEL); 2130 if (!osb->slot_recovery_generations) { 2131 status = -ENOMEM; 2132 mlog_errno(status); 2133 goto bail; 2134 } 2135 2136 init_waitqueue_head(&osb->osb_wipe_event); 2137 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2138 sizeof(*osb->osb_orphan_wipes), 2139 GFP_KERNEL); 2140 if (!osb->osb_orphan_wipes) { 2141 status = -ENOMEM; 2142 mlog_errno(status); 2143 goto bail; 2144 } 2145 2146 osb->osb_rf_lock_tree = RB_ROOT; 2147 2148 osb->s_feature_compat = 2149 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2150 osb->s_feature_ro_compat = 2151 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2152 osb->s_feature_incompat = 2153 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2154 2155 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2156 mlog(ML_ERROR, "couldn't mount because of unsupported " 2157 "optional features (%x).\n", i); 2158 status = -EINVAL; 2159 goto bail; 2160 } 2161 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2162 mlog(ML_ERROR, "couldn't mount RDWR because of " 2163 "unsupported optional features (%x).\n", i); 2164 status = -EINVAL; 2165 goto bail; 2166 } 2167 2168 if (ocfs2_clusterinfo_valid(osb)) { 2169 /* 2170 * ci_stack and ci_cluster in ocfs2_cluster_info may not be null 2171 * terminated, so make sure no overflow happens here by using 2172 * memcpy. Destination strings will always be null terminated 2173 * because osb is allocated using kzalloc. 2174 */ 2175 osb->osb_stackflags = 2176 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2177 memcpy(osb->osb_cluster_stack, 2178 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2179 OCFS2_STACK_LABEL_LEN); 2180 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2181 mlog(ML_ERROR, 2182 "couldn't mount because of an invalid " 2183 "cluster stack label (%s) \n", 2184 osb->osb_cluster_stack); 2185 status = -EINVAL; 2186 goto bail; 2187 } 2188 memcpy(osb->osb_cluster_name, 2189 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2190 OCFS2_CLUSTER_NAME_LEN); 2191 } else { 2192 /* The empty string is identical with classic tools that 2193 * don't know about s_cluster_info. */ 2194 osb->osb_cluster_stack[0] = '\0'; 2195 } 2196 2197 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2198 2199 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2200 init_llist_head(&osb->dquot_drop_list); 2201 2202 /* get some pseudo constants for clustersize bits */ 2203 osb->s_clustersize_bits = 2204 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2205 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2206 2207 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2208 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2209 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2210 osb->s_clustersize); 2211 status = -EINVAL; 2212 goto bail; 2213 } 2214 2215 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2216 le32_to_cpu(di->i_clusters)); 2217 2218 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2219 total_blocks); 2220 if (status) { 2221 mlog(ML_ERROR, "Volume too large " 2222 "to mount safely on this system"); 2223 status = -EFBIG; 2224 goto bail; 2225 } 2226 2227 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2228 sizeof(di->id2.i_super.s_uuid))) { 2229 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2230 status = -ENOMEM; 2231 goto bail; 2232 } 2233 2234 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2235 OCFS2_MAX_VOL_LABEL_LEN); 2236 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2237 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2238 osb->first_cluster_group_blkno = 2239 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2240 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2241 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2242 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2243 (unsigned long long)osb->root_blkno, 2244 (unsigned long long)osb->system_dir_blkno, 2245 osb->s_clustersize_bits); 2246 2247 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2248 if (!osb->osb_dlm_debug) { 2249 status = -ENOMEM; 2250 mlog_errno(status); 2251 goto bail; 2252 } 2253 2254 atomic_set(&osb->vol_state, VOLUME_INIT); 2255 2256 /* load root, system_dir, and all global system inodes */ 2257 status = ocfs2_init_global_system_inodes(osb); 2258 if (status < 0) { 2259 mlog_errno(status); 2260 goto bail; 2261 } 2262 2263 /* 2264 * global bitmap 2265 */ 2266 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2267 OCFS2_INVALID_SLOT); 2268 if (!inode) { 2269 status = -EINVAL; 2270 mlog_errno(status); 2271 goto bail; 2272 } 2273 2274 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2275 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2276 iput(inode); 2277 2278 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2279 osb->s_feature_incompat) * 8; 2280 2281 status = ocfs2_init_slot_info(osb); 2282 if (status < 0) { 2283 mlog_errno(status); 2284 goto bail; 2285 } 2286 cleancache_init_shared_fs(sb); 2287 2288 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2289 if (!osb->ocfs2_wq) { 2290 status = -ENOMEM; 2291 mlog_errno(status); 2292 } 2293 2294 bail: 2295 return status; 2296 } 2297 2298 /* 2299 * will return: -EAGAIN if it is ok to keep searching for superblocks 2300 * -EINVAL if there is a bad superblock 2301 * 0 on success 2302 */ 2303 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2304 struct buffer_head *bh, 2305 u32 blksz, 2306 struct ocfs2_blockcheck_stats *stats) 2307 { 2308 int status = -EAGAIN; 2309 2310 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2311 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2312 /* We have to do a raw check of the feature here */ 2313 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2314 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2315 status = ocfs2_block_check_validate(bh->b_data, 2316 bh->b_size, 2317 &di->i_check, 2318 stats); 2319 if (status) 2320 goto out; 2321 } 2322 status = -EINVAL; 2323 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2324 mlog(ML_ERROR, "found superblock with incorrect block " 2325 "size: found %u, should be %u\n", 2326 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2327 blksz); 2328 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2329 OCFS2_MAJOR_REV_LEVEL || 2330 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2331 OCFS2_MINOR_REV_LEVEL) { 2332 mlog(ML_ERROR, "found superblock with bad version: " 2333 "found %u.%u, should be %u.%u\n", 2334 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2335 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2336 OCFS2_MAJOR_REV_LEVEL, 2337 OCFS2_MINOR_REV_LEVEL); 2338 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2339 mlog(ML_ERROR, "bad block number on superblock: " 2340 "found %llu, should be %llu\n", 2341 (unsigned long long)le64_to_cpu(di->i_blkno), 2342 (unsigned long long)bh->b_blocknr); 2343 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2344 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2345 mlog(ML_ERROR, "bad cluster size found: %u\n", 2346 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2347 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2348 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2349 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2350 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2351 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2352 mlog(ML_ERROR, 2353 "Superblock slots found greater than file system " 2354 "maximum: found %u, max %u\n", 2355 le16_to_cpu(di->id2.i_super.s_max_slots), 2356 OCFS2_MAX_SLOTS); 2357 } else { 2358 /* found it! */ 2359 status = 0; 2360 } 2361 } 2362 2363 out: 2364 if (status && status != -EAGAIN) 2365 mlog_errno(status); 2366 return status; 2367 } 2368 2369 static int ocfs2_check_volume(struct ocfs2_super *osb) 2370 { 2371 int status; 2372 int dirty; 2373 int local; 2374 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2375 * recover 2376 * ourselves. */ 2377 2378 /* Init our journal object. */ 2379 status = ocfs2_journal_init(osb, &dirty); 2380 if (status < 0) { 2381 mlog(ML_ERROR, "Could not initialize journal!\n"); 2382 goto finally; 2383 } 2384 2385 /* Now that journal has been initialized, check to make sure 2386 entire volume is addressable. */ 2387 status = ocfs2_journal_addressable(osb); 2388 if (status) 2389 goto finally; 2390 2391 /* If the journal was unmounted cleanly then we don't want to 2392 * recover anything. Otherwise, journal_load will do that 2393 * dirty work for us :) */ 2394 if (!dirty) { 2395 status = ocfs2_journal_wipe(osb->journal, 0); 2396 if (status < 0) { 2397 mlog_errno(status); 2398 goto finally; 2399 } 2400 } else { 2401 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2402 "unmounted cleanly, recovering it.\n", osb->dev_str); 2403 } 2404 2405 local = ocfs2_mount_local(osb); 2406 2407 /* will play back anything left in the journal. */ 2408 status = ocfs2_journal_load(osb->journal, local, dirty); 2409 if (status < 0) { 2410 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2411 goto finally; 2412 } 2413 2414 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2415 jbd2_journal_set_features(osb->journal->j_journal, 2416 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2417 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2418 else 2419 jbd2_journal_clear_features(osb->journal->j_journal, 2420 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2421 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2422 2423 if (dirty) { 2424 /* recover my local alloc if we didn't unmount cleanly. */ 2425 status = ocfs2_begin_local_alloc_recovery(osb, 2426 osb->slot_num, 2427 &local_alloc); 2428 if (status < 0) { 2429 mlog_errno(status); 2430 goto finally; 2431 } 2432 /* we complete the recovery process after we've marked 2433 * ourselves as mounted. */ 2434 } 2435 2436 status = ocfs2_load_local_alloc(osb); 2437 if (status < 0) { 2438 mlog_errno(status); 2439 goto finally; 2440 } 2441 2442 if (dirty) { 2443 /* Recovery will be completed after we've mounted the 2444 * rest of the volume. */ 2445 osb->local_alloc_copy = local_alloc; 2446 local_alloc = NULL; 2447 } 2448 2449 /* go through each journal, trylock it and if you get the 2450 * lock, and it's marked as dirty, set the bit in the recover 2451 * map and launch a recovery thread for it. */ 2452 status = ocfs2_mark_dead_nodes(osb); 2453 if (status < 0) { 2454 mlog_errno(status); 2455 goto finally; 2456 } 2457 2458 status = ocfs2_compute_replay_slots(osb); 2459 if (status < 0) 2460 mlog_errno(status); 2461 2462 finally: 2463 kfree(local_alloc); 2464 2465 if (status) 2466 mlog_errno(status); 2467 return status; 2468 } 2469 2470 /* 2471 * The routine gets called from dismount or close whenever a dismount on 2472 * volume is requested and the osb open count becomes 1. 2473 * It will remove the osb from the global list and also free up all the 2474 * initialized resources and fileobject. 2475 */ 2476 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2477 { 2478 /* This function assumes that the caller has the main osb resource */ 2479 2480 /* ocfs2_initializer_super have already created this workqueue */ 2481 if (osb->ocfs2_wq) 2482 destroy_workqueue(osb->ocfs2_wq); 2483 2484 ocfs2_free_slot_info(osb); 2485 2486 kfree(osb->osb_orphan_wipes); 2487 kfree(osb->slot_recovery_generations); 2488 kfree(osb->local_alloc_copy); 2489 kfree(osb->uuid_str); 2490 kfree(osb->vol_label); 2491 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2492 memset(osb, 0, sizeof(struct ocfs2_super)); 2493 } 2494 2495 /* Depending on the mount option passed, perform one of the following: 2496 * Put OCFS2 into a readonly state (default) 2497 * Return EIO so that only the process errs 2498 * Fix the error as if fsck.ocfs2 -y 2499 * panic 2500 */ 2501 static int ocfs2_handle_error(struct super_block *sb) 2502 { 2503 struct ocfs2_super *osb = OCFS2_SB(sb); 2504 int rv = 0; 2505 2506 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2507 pr_crit("On-disk corruption discovered. " 2508 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2509 2510 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2511 panic("OCFS2: (device %s): panic forced after error\n", 2512 sb->s_id); 2513 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2514 pr_crit("OCFS2: Returning error to the calling process.\n"); 2515 rv = -EIO; 2516 } else { /* default option */ 2517 rv = -EROFS; 2518 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb))) 2519 return rv; 2520 2521 pr_crit("OCFS2: File system is now read-only.\n"); 2522 sb->s_flags |= SB_RDONLY; 2523 ocfs2_set_ro_flag(osb, 0); 2524 } 2525 2526 return rv; 2527 } 2528 2529 int __ocfs2_error(struct super_block *sb, const char *function, 2530 const char *fmt, ...) 2531 { 2532 struct va_format vaf; 2533 va_list args; 2534 2535 va_start(args, fmt); 2536 vaf.fmt = fmt; 2537 vaf.va = &args; 2538 2539 /* Not using mlog here because we want to show the actual 2540 * function the error came from. */ 2541 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2542 sb->s_id, function, &vaf); 2543 2544 va_end(args); 2545 2546 return ocfs2_handle_error(sb); 2547 } 2548 2549 /* Handle critical errors. This is intentionally more drastic than 2550 * ocfs2_handle_error, so we only use for things like journal errors, 2551 * etc. */ 2552 void __ocfs2_abort(struct super_block *sb, const char *function, 2553 const char *fmt, ...) 2554 { 2555 struct va_format vaf; 2556 va_list args; 2557 2558 va_start(args, fmt); 2559 2560 vaf.fmt = fmt; 2561 vaf.va = &args; 2562 2563 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2564 sb->s_id, function, &vaf); 2565 2566 va_end(args); 2567 2568 /* We don't have the cluster support yet to go straight to 2569 * hard readonly in here. Until then, we want to keep 2570 * ocfs2_abort() so that we can at least mark critical 2571 * errors. 2572 * 2573 * TODO: This should abort the journal and alert other nodes 2574 * that our slot needs recovery. */ 2575 2576 /* Force a panic(). This stinks, but it's better than letting 2577 * things continue without having a proper hard readonly 2578 * here. */ 2579 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2580 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2581 ocfs2_handle_error(sb); 2582 } 2583 2584 /* 2585 * Void signal blockers, because in-kernel sigprocmask() only fails 2586 * when SIG_* is wrong. 2587 */ 2588 void ocfs2_block_signals(sigset_t *oldset) 2589 { 2590 int rc; 2591 sigset_t blocked; 2592 2593 sigfillset(&blocked); 2594 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2595 BUG_ON(rc); 2596 } 2597 2598 void ocfs2_unblock_signals(sigset_t *oldset) 2599 { 2600 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2601 BUG_ON(rc); 2602 } 2603 2604 module_init(ocfs2_init); 2605 module_exit(ocfs2_exit); 2606