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