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 out; 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 out; 1000 } 1001 1002 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1003 brelse(bh); 1004 bh = NULL; 1005 if (status < 0) 1006 goto out; 1007 1008 osb = OCFS2_SB(sb); 1009 1010 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1011 status = -EINVAL; 1012 goto out_super; 1013 } 1014 osb->s_mount_opt = parsed_options.mount_opt; 1015 osb->s_atime_quantum = parsed_options.atime_quantum; 1016 osb->preferred_slot = parsed_options.slot; 1017 osb->osb_commit_interval = parsed_options.commit_interval; 1018 1019 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1020 osb->osb_resv_level = parsed_options.resv_level; 1021 osb->osb_dir_resv_level = parsed_options.resv_level; 1022 if (parsed_options.dir_resv_level == -1) 1023 osb->osb_dir_resv_level = parsed_options.resv_level; 1024 else 1025 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1026 1027 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1028 if (status) 1029 goto out_super; 1030 1031 sb->s_magic = OCFS2_SUPER_MAGIC; 1032 1033 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) | 1034 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0); 1035 1036 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY, 1037 * heartbeat=none */ 1038 if (bdev_read_only(sb->s_bdev)) { 1039 if (!sb_rdonly(sb)) { 1040 status = -EACCES; 1041 mlog(ML_ERROR, "Readonly device detected but readonly " 1042 "mount was not specified.\n"); 1043 goto out_super; 1044 } 1045 1046 /* You should not be able to start a local heartbeat 1047 * on a readonly device. */ 1048 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1049 status = -EROFS; 1050 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1051 "device.\n"); 1052 goto out_super; 1053 } 1054 1055 status = ocfs2_check_journals_nolocks(osb); 1056 if (status < 0) { 1057 if (status == -EROFS) 1058 mlog(ML_ERROR, "Recovery required on readonly " 1059 "file system, but write access is " 1060 "unavailable.\n"); 1061 goto out_super; 1062 } 1063 1064 ocfs2_set_ro_flag(osb, 1); 1065 1066 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1067 "Cluster services will not be used for this mount. " 1068 "Recovery will be skipped.\n", osb->dev_str); 1069 } 1070 1071 if (!ocfs2_is_hard_readonly(osb)) { 1072 if (sb_rdonly(sb)) 1073 ocfs2_set_ro_flag(osb, 0); 1074 } 1075 1076 status = ocfs2_verify_heartbeat(osb); 1077 if (status < 0) 1078 goto out_super; 1079 1080 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1081 ocfs2_debugfs_root); 1082 1083 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root, 1084 osb, &ocfs2_osb_debug_fops); 1085 1086 if (ocfs2_meta_ecc(osb)) 1087 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats, 1088 osb->osb_debug_root); 1089 1090 status = ocfs2_mount_volume(sb); 1091 if (status < 0) 1092 goto out_debugfs; 1093 1094 if (osb->root_inode) 1095 inode = igrab(osb->root_inode); 1096 1097 if (!inode) { 1098 status = -EIO; 1099 goto out_dismount; 1100 } 1101 1102 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL, 1103 &ocfs2_kset->kobj); 1104 if (!osb->osb_dev_kset) { 1105 status = -ENOMEM; 1106 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id); 1107 goto out_dismount; 1108 } 1109 1110 /* Create filecheck sysfs related directories/files at 1111 * /sys/fs/ocfs2/<devname>/filecheck */ 1112 if (ocfs2_filecheck_create_sysfs(osb)) { 1113 status = -ENOMEM; 1114 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at " 1115 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id); 1116 goto out_dismount; 1117 } 1118 1119 root = d_make_root(inode); 1120 if (!root) { 1121 status = -ENOMEM; 1122 goto out_dismount; 1123 } 1124 1125 sb->s_root = root; 1126 1127 ocfs2_complete_mount_recovery(osb); 1128 1129 if (ocfs2_mount_local(osb)) 1130 snprintf(nodestr, sizeof(nodestr), "local"); 1131 else 1132 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1133 1134 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1135 "with %s data mode.\n", 1136 osb->dev_str, nodestr, osb->slot_num, 1137 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1138 "ordered"); 1139 1140 if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) && 1141 !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT)) 1142 printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted " 1143 "without cluster aware mode.\n", osb->dev_str); 1144 1145 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1146 wake_up(&osb->osb_mount_event); 1147 1148 /* Now we can initialize quotas because we can afford to wait 1149 * for cluster locks recovery now. That also means that truncation 1150 * log recovery can happen but that waits for proper quota setup */ 1151 if (!sb_rdonly(sb)) { 1152 status = ocfs2_enable_quotas(osb); 1153 if (status < 0) { 1154 /* We have to err-out specially here because 1155 * s_root is already set */ 1156 mlog_errno(status); 1157 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1158 wake_up(&osb->osb_mount_event); 1159 return status; 1160 } 1161 } 1162 1163 ocfs2_complete_quota_recovery(osb); 1164 1165 /* Now we wake up again for processes waiting for quotas */ 1166 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1167 wake_up(&osb->osb_mount_event); 1168 1169 /* Start this when the mount is almost sure of being successful */ 1170 ocfs2_orphan_scan_start(osb); 1171 1172 return status; 1173 1174 out_dismount: 1175 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1176 wake_up(&osb->osb_mount_event); 1177 ocfs2_dismount_volume(sb, 1); 1178 goto out; 1179 1180 out_debugfs: 1181 debugfs_remove_recursive(osb->osb_debug_root); 1182 out_super: 1183 ocfs2_release_system_inodes(osb); 1184 kfree(osb->recovery_map); 1185 ocfs2_delete_osb(osb); 1186 kfree(osb); 1187 out: 1188 mlog_errno(status); 1189 1190 return status; 1191 } 1192 1193 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1194 int flags, 1195 const char *dev_name, 1196 void *data) 1197 { 1198 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1199 } 1200 1201 static struct file_system_type ocfs2_fs_type = { 1202 .owner = THIS_MODULE, 1203 .name = "ocfs2", 1204 .mount = ocfs2_mount, 1205 .kill_sb = kill_block_super, 1206 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1207 .next = NULL 1208 }; 1209 MODULE_ALIAS_FS("ocfs2"); 1210 1211 static int ocfs2_check_set_options(struct super_block *sb, 1212 struct mount_options *options) 1213 { 1214 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1215 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1216 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1217 mlog(ML_ERROR, "User quotas were requested, but this " 1218 "filesystem does not have the feature enabled.\n"); 1219 return 0; 1220 } 1221 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1222 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1223 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1224 mlog(ML_ERROR, "Group quotas were requested, but this " 1225 "filesystem does not have the feature enabled.\n"); 1226 return 0; 1227 } 1228 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1229 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1230 mlog(ML_ERROR, "ACL support requested but extended attributes " 1231 "feature is not enabled\n"); 1232 return 0; 1233 } 1234 /* No ACL setting specified? Use XATTR feature... */ 1235 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1236 OCFS2_MOUNT_NO_POSIX_ACL))) { 1237 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1238 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1239 else 1240 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1241 } 1242 return 1; 1243 } 1244 1245 static int ocfs2_parse_options(struct super_block *sb, 1246 char *options, 1247 struct mount_options *mopt, 1248 int is_remount) 1249 { 1250 int status, user_stack = 0; 1251 char *p; 1252 u32 tmp; 1253 int token, option; 1254 substring_t args[MAX_OPT_ARGS]; 1255 1256 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1257 1258 mopt->commit_interval = 0; 1259 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1260 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1261 mopt->slot = OCFS2_INVALID_SLOT; 1262 mopt->localalloc_opt = -1; 1263 mopt->cluster_stack[0] = '\0'; 1264 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1265 mopt->dir_resv_level = -1; 1266 1267 if (!options) { 1268 status = 1; 1269 goto bail; 1270 } 1271 1272 while ((p = strsep(&options, ",")) != NULL) { 1273 if (!*p) 1274 continue; 1275 1276 token = match_token(p, tokens, args); 1277 switch (token) { 1278 case Opt_hb_local: 1279 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1280 break; 1281 case Opt_hb_none: 1282 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1283 break; 1284 case Opt_hb_global: 1285 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1286 break; 1287 case Opt_barrier: 1288 if (match_int(&args[0], &option)) { 1289 status = 0; 1290 goto bail; 1291 } 1292 if (option) 1293 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1294 else 1295 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1296 break; 1297 case Opt_intr: 1298 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1299 break; 1300 case Opt_nointr: 1301 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1302 break; 1303 case Opt_err_panic: 1304 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1305 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1306 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1307 break; 1308 case Opt_err_ro: 1309 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1310 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1311 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1312 break; 1313 case Opt_err_cont: 1314 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1315 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1316 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1317 break; 1318 case Opt_data_ordered: 1319 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1320 break; 1321 case Opt_data_writeback: 1322 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1323 break; 1324 case Opt_user_xattr: 1325 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1326 break; 1327 case Opt_nouser_xattr: 1328 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1329 break; 1330 case Opt_atime_quantum: 1331 if (match_int(&args[0], &option)) { 1332 status = 0; 1333 goto bail; 1334 } 1335 if (option >= 0) 1336 mopt->atime_quantum = option; 1337 break; 1338 case Opt_slot: 1339 if (match_int(&args[0], &option)) { 1340 status = 0; 1341 goto bail; 1342 } 1343 if (option) 1344 mopt->slot = (u16)option; 1345 break; 1346 case Opt_commit: 1347 if (match_int(&args[0], &option)) { 1348 status = 0; 1349 goto bail; 1350 } 1351 if (option < 0) 1352 return 0; 1353 if (option == 0) 1354 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1355 mopt->commit_interval = HZ * option; 1356 break; 1357 case Opt_localalloc: 1358 if (match_int(&args[0], &option)) { 1359 status = 0; 1360 goto bail; 1361 } 1362 if (option >= 0) 1363 mopt->localalloc_opt = option; 1364 break; 1365 case Opt_localflocks: 1366 /* 1367 * Changing this during remount could race 1368 * flock() requests, or "unbalance" existing 1369 * ones (e.g., a lock is taken in one mode but 1370 * dropped in the other). If users care enough 1371 * to flip locking modes during remount, we 1372 * could add a "local" flag to individual 1373 * flock structures for proper tracking of 1374 * state. 1375 */ 1376 if (!is_remount) 1377 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1378 break; 1379 case Opt_stack: 1380 /* Check both that the option we were passed 1381 * is of the right length and that it is a proper 1382 * string of the right length. 1383 */ 1384 if (((args[0].to - args[0].from) != 1385 OCFS2_STACK_LABEL_LEN) || 1386 (strnlen(args[0].from, 1387 OCFS2_STACK_LABEL_LEN) != 1388 OCFS2_STACK_LABEL_LEN)) { 1389 mlog(ML_ERROR, 1390 "Invalid cluster_stack option\n"); 1391 status = 0; 1392 goto bail; 1393 } 1394 memcpy(mopt->cluster_stack, args[0].from, 1395 OCFS2_STACK_LABEL_LEN); 1396 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1397 /* 1398 * Open code the memcmp here as we don't have 1399 * an osb to pass to 1400 * ocfs2_userspace_stack(). 1401 */ 1402 if (memcmp(mopt->cluster_stack, 1403 OCFS2_CLASSIC_CLUSTER_STACK, 1404 OCFS2_STACK_LABEL_LEN)) 1405 user_stack = 1; 1406 break; 1407 case Opt_inode64: 1408 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1409 break; 1410 case Opt_usrquota: 1411 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1412 break; 1413 case Opt_grpquota: 1414 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1415 break; 1416 case Opt_coherency_buffered: 1417 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1418 break; 1419 case Opt_coherency_full: 1420 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1421 break; 1422 case Opt_acl: 1423 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1424 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1425 break; 1426 case Opt_noacl: 1427 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1428 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1429 break; 1430 case Opt_resv_level: 1431 if (is_remount) 1432 break; 1433 if (match_int(&args[0], &option)) { 1434 status = 0; 1435 goto bail; 1436 } 1437 if (option >= OCFS2_MIN_RESV_LEVEL && 1438 option < OCFS2_MAX_RESV_LEVEL) 1439 mopt->resv_level = option; 1440 break; 1441 case Opt_dir_resv_level: 1442 if (is_remount) 1443 break; 1444 if (match_int(&args[0], &option)) { 1445 status = 0; 1446 goto bail; 1447 } 1448 if (option >= OCFS2_MIN_RESV_LEVEL && 1449 option < OCFS2_MAX_RESV_LEVEL) 1450 mopt->dir_resv_level = option; 1451 break; 1452 case Opt_journal_async_commit: 1453 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1454 break; 1455 case Opt_nocluster: 1456 mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER; 1457 break; 1458 default: 1459 mlog(ML_ERROR, 1460 "Unrecognized mount option \"%s\" " 1461 "or missing value\n", p); 1462 status = 0; 1463 goto bail; 1464 } 1465 } 1466 1467 if (user_stack == 0) { 1468 /* Ensure only one heartbeat mode */ 1469 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1470 OCFS2_MOUNT_HB_GLOBAL | 1471 OCFS2_MOUNT_HB_NONE); 1472 if (hweight32(tmp) != 1) { 1473 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1474 status = 0; 1475 goto bail; 1476 } 1477 } 1478 1479 status = 1; 1480 1481 bail: 1482 return status; 1483 } 1484 1485 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1486 { 1487 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1488 unsigned long opts = osb->s_mount_opt; 1489 unsigned int local_alloc_megs; 1490 1491 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1492 seq_printf(s, ",_netdev"); 1493 if (opts & OCFS2_MOUNT_HB_LOCAL) 1494 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1495 else 1496 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1497 } else 1498 seq_printf(s, ",%s", OCFS2_HB_NONE); 1499 1500 if (opts & OCFS2_MOUNT_NOINTR) 1501 seq_printf(s, ",nointr"); 1502 1503 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1504 seq_printf(s, ",data=writeback"); 1505 else 1506 seq_printf(s, ",data=ordered"); 1507 1508 if (opts & OCFS2_MOUNT_BARRIER) 1509 seq_printf(s, ",barrier=1"); 1510 1511 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1512 seq_printf(s, ",errors=panic"); 1513 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1514 seq_printf(s, ",errors=continue"); 1515 else 1516 seq_printf(s, ",errors=remount-ro"); 1517 1518 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1519 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1520 1521 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1522 1523 if (osb->osb_commit_interval) 1524 seq_printf(s, ",commit=%u", 1525 (unsigned) (osb->osb_commit_interval / HZ)); 1526 1527 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1528 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1529 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1530 1531 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1532 seq_printf(s, ",localflocks,"); 1533 1534 if (osb->osb_cluster_stack[0]) 1535 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1536 OCFS2_STACK_LABEL_LEN); 1537 if (opts & OCFS2_MOUNT_USRQUOTA) 1538 seq_printf(s, ",usrquota"); 1539 if (opts & OCFS2_MOUNT_GRPQUOTA) 1540 seq_printf(s, ",grpquota"); 1541 1542 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1543 seq_printf(s, ",coherency=buffered"); 1544 else 1545 seq_printf(s, ",coherency=full"); 1546 1547 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1548 seq_printf(s, ",nouser_xattr"); 1549 else 1550 seq_printf(s, ",user_xattr"); 1551 1552 if (opts & OCFS2_MOUNT_INODE64) 1553 seq_printf(s, ",inode64"); 1554 1555 if (opts & OCFS2_MOUNT_POSIX_ACL) 1556 seq_printf(s, ",acl"); 1557 else 1558 seq_printf(s, ",noacl"); 1559 1560 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1561 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1562 1563 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1564 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1565 1566 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1567 seq_printf(s, ",journal_async_commit"); 1568 1569 if (opts & OCFS2_MOUNT_NOCLUSTER) 1570 seq_printf(s, ",nocluster"); 1571 1572 return 0; 1573 } 1574 1575 static int __init ocfs2_init(void) 1576 { 1577 int status; 1578 1579 status = init_ocfs2_uptodate_cache(); 1580 if (status < 0) 1581 goto out1; 1582 1583 status = ocfs2_initialize_mem_caches(); 1584 if (status < 0) 1585 goto out2; 1586 1587 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1588 1589 ocfs2_set_locking_protocol(); 1590 1591 status = register_quota_format(&ocfs2_quota_format); 1592 if (status < 0) 1593 goto out3; 1594 status = register_filesystem(&ocfs2_fs_type); 1595 if (!status) 1596 return 0; 1597 1598 unregister_quota_format(&ocfs2_quota_format); 1599 out3: 1600 debugfs_remove(ocfs2_debugfs_root); 1601 ocfs2_free_mem_caches(); 1602 out2: 1603 exit_ocfs2_uptodate_cache(); 1604 out1: 1605 mlog_errno(status); 1606 return status; 1607 } 1608 1609 static void __exit ocfs2_exit(void) 1610 { 1611 unregister_quota_format(&ocfs2_quota_format); 1612 1613 debugfs_remove(ocfs2_debugfs_root); 1614 1615 ocfs2_free_mem_caches(); 1616 1617 unregister_filesystem(&ocfs2_fs_type); 1618 1619 exit_ocfs2_uptodate_cache(); 1620 } 1621 1622 static void ocfs2_put_super(struct super_block *sb) 1623 { 1624 trace_ocfs2_put_super(sb); 1625 1626 ocfs2_sync_blockdev(sb); 1627 ocfs2_dismount_volume(sb, 0); 1628 } 1629 1630 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1631 { 1632 struct ocfs2_super *osb; 1633 u32 numbits, freebits; 1634 int status; 1635 struct ocfs2_dinode *bm_lock; 1636 struct buffer_head *bh = NULL; 1637 struct inode *inode = NULL; 1638 1639 trace_ocfs2_statfs(dentry->d_sb, buf); 1640 1641 osb = OCFS2_SB(dentry->d_sb); 1642 1643 inode = ocfs2_get_system_file_inode(osb, 1644 GLOBAL_BITMAP_SYSTEM_INODE, 1645 OCFS2_INVALID_SLOT); 1646 if (!inode) { 1647 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1648 status = -EIO; 1649 goto bail; 1650 } 1651 1652 status = ocfs2_inode_lock(inode, &bh, 0); 1653 if (status < 0) { 1654 mlog_errno(status); 1655 goto bail; 1656 } 1657 1658 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1659 1660 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1661 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1662 1663 buf->f_type = OCFS2_SUPER_MAGIC; 1664 buf->f_bsize = dentry->d_sb->s_blocksize; 1665 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1666 buf->f_blocks = ((sector_t) numbits) * 1667 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1668 buf->f_bfree = ((sector_t) freebits) * 1669 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1670 buf->f_bavail = buf->f_bfree; 1671 buf->f_files = numbits; 1672 buf->f_ffree = freebits; 1673 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1674 & 0xFFFFFFFFUL; 1675 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1676 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1677 1678 brelse(bh); 1679 1680 ocfs2_inode_unlock(inode, 0); 1681 status = 0; 1682 bail: 1683 iput(inode); 1684 1685 if (status) 1686 mlog_errno(status); 1687 1688 return status; 1689 } 1690 1691 static void ocfs2_inode_init_once(void *data) 1692 { 1693 struct ocfs2_inode_info *oi = data; 1694 1695 oi->ip_flags = 0; 1696 oi->ip_open_count = 0; 1697 spin_lock_init(&oi->ip_lock); 1698 ocfs2_extent_map_init(&oi->vfs_inode); 1699 INIT_LIST_HEAD(&oi->ip_io_markers); 1700 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1701 oi->ip_dir_start_lookup = 0; 1702 init_rwsem(&oi->ip_alloc_sem); 1703 init_rwsem(&oi->ip_xattr_sem); 1704 mutex_init(&oi->ip_io_mutex); 1705 1706 oi->ip_blkno = 0ULL; 1707 oi->ip_clusters = 0; 1708 oi->ip_next_orphan = NULL; 1709 1710 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1711 1712 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1713 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1714 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1715 1716 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1717 &ocfs2_inode_caching_ops); 1718 1719 inode_init_once(&oi->vfs_inode); 1720 } 1721 1722 static int ocfs2_initialize_mem_caches(void) 1723 { 1724 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1725 sizeof(struct ocfs2_inode_info), 1726 0, 1727 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1728 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1729 ocfs2_inode_init_once); 1730 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1731 sizeof(struct ocfs2_dquot), 1732 0, 1733 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1734 SLAB_MEM_SPREAD), 1735 NULL); 1736 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1737 sizeof(struct ocfs2_quota_chunk), 1738 0, 1739 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1740 NULL); 1741 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1742 !ocfs2_qf_chunk_cachep) { 1743 kmem_cache_destroy(ocfs2_inode_cachep); 1744 kmem_cache_destroy(ocfs2_dquot_cachep); 1745 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1746 return -ENOMEM; 1747 } 1748 1749 return 0; 1750 } 1751 1752 static void ocfs2_free_mem_caches(void) 1753 { 1754 /* 1755 * Make sure all delayed rcu free inodes are flushed before we 1756 * destroy cache. 1757 */ 1758 rcu_barrier(); 1759 kmem_cache_destroy(ocfs2_inode_cachep); 1760 ocfs2_inode_cachep = NULL; 1761 1762 kmem_cache_destroy(ocfs2_dquot_cachep); 1763 ocfs2_dquot_cachep = NULL; 1764 1765 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1766 ocfs2_qf_chunk_cachep = NULL; 1767 } 1768 1769 static int ocfs2_get_sector(struct super_block *sb, 1770 struct buffer_head **bh, 1771 int block, 1772 int sect_size) 1773 { 1774 if (!sb_set_blocksize(sb, sect_size)) { 1775 mlog(ML_ERROR, "unable to set blocksize\n"); 1776 return -EIO; 1777 } 1778 1779 *bh = sb_getblk(sb, block); 1780 if (!*bh) { 1781 mlog_errno(-ENOMEM); 1782 return -ENOMEM; 1783 } 1784 lock_buffer(*bh); 1785 if (!buffer_dirty(*bh)) 1786 clear_buffer_uptodate(*bh); 1787 unlock_buffer(*bh); 1788 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1789 wait_on_buffer(*bh); 1790 if (!buffer_uptodate(*bh)) { 1791 mlog_errno(-EIO); 1792 brelse(*bh); 1793 *bh = NULL; 1794 return -EIO; 1795 } 1796 1797 return 0; 1798 } 1799 1800 static int ocfs2_mount_volume(struct super_block *sb) 1801 { 1802 int status = 0; 1803 struct ocfs2_super *osb = OCFS2_SB(sb); 1804 1805 if (ocfs2_is_hard_readonly(osb)) 1806 goto out; 1807 1808 mutex_init(&osb->obs_trim_fs_mutex); 1809 1810 status = ocfs2_dlm_init(osb); 1811 if (status < 0) { 1812 mlog_errno(status); 1813 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1814 mlog(ML_ERROR, "couldn't mount because cluster name on" 1815 " disk does not match the running cluster name.\n"); 1816 goto out; 1817 } 1818 1819 status = ocfs2_super_lock(osb, 1); 1820 if (status < 0) { 1821 mlog_errno(status); 1822 goto out_dlm; 1823 } 1824 1825 /* This will load up the node map and add ourselves to it. */ 1826 status = ocfs2_find_slot(osb); 1827 if (status < 0) { 1828 mlog_errno(status); 1829 goto out_super_lock; 1830 } 1831 1832 /* load all node-local system inodes */ 1833 status = ocfs2_init_local_system_inodes(osb); 1834 if (status < 0) { 1835 mlog_errno(status); 1836 goto out_super_lock; 1837 } 1838 1839 status = ocfs2_check_volume(osb); 1840 if (status < 0) { 1841 mlog_errno(status); 1842 goto out_system_inodes; 1843 } 1844 1845 status = ocfs2_truncate_log_init(osb); 1846 if (status < 0) { 1847 mlog_errno(status); 1848 goto out_system_inodes; 1849 } 1850 1851 ocfs2_super_unlock(osb, 1); 1852 return 0; 1853 1854 out_system_inodes: 1855 if (osb->local_alloc_state == OCFS2_LA_ENABLED) 1856 ocfs2_shutdown_local_alloc(osb); 1857 ocfs2_release_system_inodes(osb); 1858 /* before journal shutdown, we should release slot_info */ 1859 ocfs2_free_slot_info(osb); 1860 ocfs2_journal_shutdown(osb); 1861 out_super_lock: 1862 ocfs2_super_unlock(osb, 1); 1863 out_dlm: 1864 ocfs2_dlm_shutdown(osb, 0); 1865 out: 1866 return status; 1867 } 1868 1869 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1870 { 1871 int tmp, hangup_needed = 0; 1872 struct ocfs2_super *osb = NULL; 1873 char nodestr[12]; 1874 1875 trace_ocfs2_dismount_volume(sb); 1876 1877 BUG_ON(!sb); 1878 osb = OCFS2_SB(sb); 1879 BUG_ON(!osb); 1880 1881 /* Remove file check sysfs related directores/files, 1882 * and wait for the pending file check operations */ 1883 ocfs2_filecheck_remove_sysfs(osb); 1884 1885 kset_unregister(osb->osb_dev_kset); 1886 1887 /* Orphan scan should be stopped as early as possible */ 1888 ocfs2_orphan_scan_stop(osb); 1889 1890 ocfs2_disable_quotas(osb); 1891 1892 /* All dquots should be freed by now */ 1893 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1894 /* Wait for worker to be done with the work structure in osb */ 1895 cancel_work_sync(&osb->dquot_drop_work); 1896 1897 ocfs2_shutdown_local_alloc(osb); 1898 1899 ocfs2_truncate_log_shutdown(osb); 1900 1901 /* This will disable recovery and flush any recovery work. */ 1902 ocfs2_recovery_exit(osb); 1903 1904 ocfs2_sync_blockdev(sb); 1905 1906 ocfs2_purge_refcount_trees(osb); 1907 1908 /* No cluster connection means we've failed during mount, so skip 1909 * all the steps which depended on that to complete. */ 1910 if (osb->cconn) { 1911 tmp = ocfs2_super_lock(osb, 1); 1912 if (tmp < 0) { 1913 mlog_errno(tmp); 1914 return; 1915 } 1916 } 1917 1918 if (osb->slot_num != OCFS2_INVALID_SLOT) 1919 ocfs2_put_slot(osb); 1920 1921 if (osb->cconn) 1922 ocfs2_super_unlock(osb, 1); 1923 1924 ocfs2_release_system_inodes(osb); 1925 1926 ocfs2_journal_shutdown(osb); 1927 1928 /* 1929 * If we're dismounting due to mount error, mount.ocfs2 will clean 1930 * up heartbeat. If we're a local mount, there is no heartbeat. 1931 * If we failed before we got a uuid_str yet, we can't stop 1932 * heartbeat. Otherwise, do it. 1933 */ 1934 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1935 !ocfs2_is_hard_readonly(osb)) 1936 hangup_needed = 1; 1937 1938 if (osb->cconn) 1939 ocfs2_dlm_shutdown(osb, hangup_needed); 1940 1941 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1942 debugfs_remove_recursive(osb->osb_debug_root); 1943 1944 if (hangup_needed) 1945 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1946 1947 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1948 1949 if (ocfs2_mount_local(osb)) 1950 snprintf(nodestr, sizeof(nodestr), "local"); 1951 else 1952 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1953 1954 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1955 osb->dev_str, nodestr); 1956 1957 ocfs2_delete_osb(osb); 1958 kfree(osb); 1959 sb->s_dev = 0; 1960 sb->s_fs_info = NULL; 1961 } 1962 1963 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1964 unsigned uuid_bytes) 1965 { 1966 int i, ret; 1967 char *ptr; 1968 1969 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1970 1971 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1972 if (osb->uuid_str == NULL) 1973 return -ENOMEM; 1974 1975 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1976 /* print with null */ 1977 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1978 if (ret != 2) /* drop super cleans up */ 1979 return -EINVAL; 1980 /* then only advance past the last char */ 1981 ptr += 2; 1982 } 1983 1984 return 0; 1985 } 1986 1987 /* Make sure entire volume is addressable by our journal. Requires 1988 osb_clusters_at_boot to be valid and for the journal to have been 1989 initialized by ocfs2_journal_init(). */ 1990 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 1991 { 1992 int status = 0; 1993 u64 max_block = 1994 ocfs2_clusters_to_blocks(osb->sb, 1995 osb->osb_clusters_at_boot) - 1; 1996 1997 /* 32-bit block number is always OK. */ 1998 if (max_block <= (u32)~0ULL) 1999 goto out; 2000 2001 /* Volume is "huge", so see if our journal is new enough to 2002 support it. */ 2003 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2004 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2005 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2006 JBD2_FEATURE_INCOMPAT_64BIT))) { 2007 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2008 "Enable the 'block64' journal option with tunefs.ocfs2"); 2009 status = -EFBIG; 2010 goto out; 2011 } 2012 2013 out: 2014 return status; 2015 } 2016 2017 static int ocfs2_initialize_super(struct super_block *sb, 2018 struct buffer_head *bh, 2019 int sector_size, 2020 struct ocfs2_blockcheck_stats *stats) 2021 { 2022 int status; 2023 int i, cbits, bbits; 2024 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2025 struct inode *inode = NULL; 2026 struct ocfs2_super *osb; 2027 u64 total_blocks; 2028 2029 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2030 if (!osb) { 2031 status = -ENOMEM; 2032 mlog_errno(status); 2033 goto out; 2034 } 2035 2036 sb->s_fs_info = osb; 2037 sb->s_op = &ocfs2_sops; 2038 sb->s_d_op = &ocfs2_dentry_ops; 2039 sb->s_export_op = &ocfs2_export_ops; 2040 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2041 sb->dq_op = &ocfs2_quota_operations; 2042 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2043 sb->s_xattr = ocfs2_xattr_handlers; 2044 sb->s_time_gran = 1; 2045 sb->s_flags |= SB_NOATIME; 2046 /* this is needed to support O_LARGEFILE */ 2047 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2048 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2049 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2050 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid, 2051 sizeof(di->id2.i_super.s_uuid)); 2052 2053 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2054 2055 for (i = 0; i < 3; i++) 2056 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2057 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2058 2059 osb->sb = sb; 2060 osb->s_sectsize_bits = blksize_bits(sector_size); 2061 BUG_ON(!osb->s_sectsize_bits); 2062 2063 spin_lock_init(&osb->dc_task_lock); 2064 init_waitqueue_head(&osb->dc_event); 2065 osb->dc_work_sequence = 0; 2066 osb->dc_wake_sequence = 0; 2067 INIT_LIST_HEAD(&osb->blocked_lock_list); 2068 osb->blocked_lock_count = 0; 2069 spin_lock_init(&osb->osb_lock); 2070 spin_lock_init(&osb->osb_xattr_lock); 2071 ocfs2_init_steal_slots(osb); 2072 2073 mutex_init(&osb->system_file_mutex); 2074 2075 atomic_set(&osb->alloc_stats.moves, 0); 2076 atomic_set(&osb->alloc_stats.local_data, 0); 2077 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2078 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2079 atomic_set(&osb->alloc_stats.bg_extends, 0); 2080 2081 /* Copy the blockcheck stats from the superblock probe */ 2082 osb->osb_ecc_stats = *stats; 2083 2084 ocfs2_init_node_maps(osb); 2085 2086 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2087 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2088 2089 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2090 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2091 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2092 osb->max_slots); 2093 status = -EINVAL; 2094 goto out; 2095 } 2096 2097 ocfs2_orphan_scan_init(osb); 2098 2099 status = ocfs2_recovery_init(osb); 2100 if (status) { 2101 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2102 mlog_errno(status); 2103 goto out; 2104 } 2105 2106 init_waitqueue_head(&osb->checkpoint_event); 2107 2108 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2109 2110 osb->slot_num = OCFS2_INVALID_SLOT; 2111 2112 osb->s_xattr_inline_size = le16_to_cpu( 2113 di->id2.i_super.s_xattr_inline_size); 2114 2115 osb->local_alloc_state = OCFS2_LA_UNUSED; 2116 osb->local_alloc_bh = NULL; 2117 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2118 2119 init_waitqueue_head(&osb->osb_mount_event); 2120 2121 ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2122 2123 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2124 if (!osb->vol_label) { 2125 mlog(ML_ERROR, "unable to alloc vol label\n"); 2126 status = -ENOMEM; 2127 goto out_recovery_map; 2128 } 2129 2130 osb->slot_recovery_generations = 2131 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2132 GFP_KERNEL); 2133 if (!osb->slot_recovery_generations) { 2134 status = -ENOMEM; 2135 mlog_errno(status); 2136 goto out_vol_label; 2137 } 2138 2139 init_waitqueue_head(&osb->osb_wipe_event); 2140 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2141 sizeof(*osb->osb_orphan_wipes), 2142 GFP_KERNEL); 2143 if (!osb->osb_orphan_wipes) { 2144 status = -ENOMEM; 2145 mlog_errno(status); 2146 goto out_slot_recovery_gen; 2147 } 2148 2149 osb->osb_rf_lock_tree = RB_ROOT; 2150 2151 osb->s_feature_compat = 2152 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2153 osb->s_feature_ro_compat = 2154 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2155 osb->s_feature_incompat = 2156 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2157 2158 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2159 mlog(ML_ERROR, "couldn't mount because of unsupported " 2160 "optional features (%x).\n", i); 2161 status = -EINVAL; 2162 goto out_orphan_wipes; 2163 } 2164 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2165 mlog(ML_ERROR, "couldn't mount RDWR because of " 2166 "unsupported optional features (%x).\n", i); 2167 status = -EINVAL; 2168 goto out_orphan_wipes; 2169 } 2170 2171 if (ocfs2_clusterinfo_valid(osb)) { 2172 /* 2173 * ci_stack and ci_cluster in ocfs2_cluster_info may not be null 2174 * terminated, so make sure no overflow happens here by using 2175 * memcpy. Destination strings will always be null terminated 2176 * because osb is allocated using kzalloc. 2177 */ 2178 osb->osb_stackflags = 2179 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2180 memcpy(osb->osb_cluster_stack, 2181 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2182 OCFS2_STACK_LABEL_LEN); 2183 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2184 mlog(ML_ERROR, 2185 "couldn't mount because of an invalid " 2186 "cluster stack label (%s) \n", 2187 osb->osb_cluster_stack); 2188 status = -EINVAL; 2189 goto out_orphan_wipes; 2190 } 2191 memcpy(osb->osb_cluster_name, 2192 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2193 OCFS2_CLUSTER_NAME_LEN); 2194 } else { 2195 /* The empty string is identical with classic tools that 2196 * don't know about s_cluster_info. */ 2197 osb->osb_cluster_stack[0] = '\0'; 2198 } 2199 2200 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2201 2202 /* 2203 * FIXME 2204 * This should be done in ocfs2_journal_init(), but any inode 2205 * writes back operation will cause the filesystem to crash. 2206 */ 2207 status = ocfs2_journal_alloc(osb); 2208 if (status < 0) 2209 goto out_orphan_wipes; 2210 2211 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2212 init_llist_head(&osb->dquot_drop_list); 2213 2214 /* get some pseudo constants for clustersize bits */ 2215 osb->s_clustersize_bits = 2216 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2217 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2218 2219 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2220 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2221 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2222 osb->s_clustersize); 2223 status = -EINVAL; 2224 goto out_journal; 2225 } 2226 2227 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2228 le32_to_cpu(di->i_clusters)); 2229 2230 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2231 total_blocks); 2232 if (status) { 2233 mlog(ML_ERROR, "Volume too large " 2234 "to mount safely on this system"); 2235 status = -EFBIG; 2236 goto out_journal; 2237 } 2238 2239 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2240 sizeof(di->id2.i_super.s_uuid))) { 2241 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2242 status = -ENOMEM; 2243 goto out_journal; 2244 } 2245 2246 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2247 OCFS2_MAX_VOL_LABEL_LEN); 2248 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2249 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2250 osb->first_cluster_group_blkno = 2251 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2252 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2253 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2254 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2255 (unsigned long long)osb->root_blkno, 2256 (unsigned long long)osb->system_dir_blkno, 2257 osb->s_clustersize_bits); 2258 2259 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2260 if (!osb->osb_dlm_debug) { 2261 status = -ENOMEM; 2262 mlog_errno(status); 2263 goto out_uuid_str; 2264 } 2265 2266 atomic_set(&osb->vol_state, VOLUME_INIT); 2267 2268 /* load root, system_dir, and all global system inodes */ 2269 status = ocfs2_init_global_system_inodes(osb); 2270 if (status < 0) { 2271 mlog_errno(status); 2272 goto out_dlm_out; 2273 } 2274 2275 /* 2276 * global bitmap 2277 */ 2278 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2279 OCFS2_INVALID_SLOT); 2280 if (!inode) { 2281 status = -EINVAL; 2282 mlog_errno(status); 2283 goto out_system_inodes; 2284 } 2285 2286 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2287 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2288 iput(inode); 2289 2290 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2291 osb->s_feature_incompat) * 8; 2292 2293 status = ocfs2_init_slot_info(osb); 2294 if (status < 0) { 2295 mlog_errno(status); 2296 goto out_system_inodes; 2297 } 2298 2299 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2300 if (!osb->ocfs2_wq) { 2301 status = -ENOMEM; 2302 mlog_errno(status); 2303 goto out_slot_info; 2304 } 2305 2306 return status; 2307 2308 out_slot_info: 2309 ocfs2_free_slot_info(osb); 2310 out_system_inodes: 2311 ocfs2_release_system_inodes(osb); 2312 out_dlm_out: 2313 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2314 out_uuid_str: 2315 kfree(osb->uuid_str); 2316 out_journal: 2317 kfree(osb->journal); 2318 out_orphan_wipes: 2319 kfree(osb->osb_orphan_wipes); 2320 out_slot_recovery_gen: 2321 kfree(osb->slot_recovery_generations); 2322 out_vol_label: 2323 kfree(osb->vol_label); 2324 out_recovery_map: 2325 kfree(osb->recovery_map); 2326 out: 2327 kfree(osb); 2328 sb->s_fs_info = NULL; 2329 return status; 2330 } 2331 2332 /* 2333 * will return: -EAGAIN if it is ok to keep searching for superblocks 2334 * -EINVAL if there is a bad superblock 2335 * 0 on success 2336 */ 2337 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2338 struct buffer_head *bh, 2339 u32 blksz, 2340 struct ocfs2_blockcheck_stats *stats) 2341 { 2342 int status = -EAGAIN; 2343 2344 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2345 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2346 /* We have to do a raw check of the feature here */ 2347 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2348 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2349 status = ocfs2_block_check_validate(bh->b_data, 2350 bh->b_size, 2351 &di->i_check, 2352 stats); 2353 if (status) 2354 goto out; 2355 } 2356 status = -EINVAL; 2357 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2358 mlog(ML_ERROR, "found superblock with incorrect block " 2359 "size: found %u, should be %u\n", 2360 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2361 blksz); 2362 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2363 OCFS2_MAJOR_REV_LEVEL || 2364 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2365 OCFS2_MINOR_REV_LEVEL) { 2366 mlog(ML_ERROR, "found superblock with bad version: " 2367 "found %u.%u, should be %u.%u\n", 2368 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2369 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2370 OCFS2_MAJOR_REV_LEVEL, 2371 OCFS2_MINOR_REV_LEVEL); 2372 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2373 mlog(ML_ERROR, "bad block number on superblock: " 2374 "found %llu, should be %llu\n", 2375 (unsigned long long)le64_to_cpu(di->i_blkno), 2376 (unsigned long long)bh->b_blocknr); 2377 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2378 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2379 mlog(ML_ERROR, "bad cluster size found: %u\n", 2380 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2381 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2382 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2383 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2384 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2385 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2386 mlog(ML_ERROR, 2387 "Superblock slots found greater than file system " 2388 "maximum: found %u, max %u\n", 2389 le16_to_cpu(di->id2.i_super.s_max_slots), 2390 OCFS2_MAX_SLOTS); 2391 } else { 2392 /* found it! */ 2393 status = 0; 2394 } 2395 } 2396 2397 out: 2398 if (status && status != -EAGAIN) 2399 mlog_errno(status); 2400 return status; 2401 } 2402 2403 static int ocfs2_check_volume(struct ocfs2_super *osb) 2404 { 2405 int status; 2406 int dirty; 2407 int local; 2408 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2409 * recover 2410 * ourselves. */ 2411 2412 /* Init our journal object. */ 2413 status = ocfs2_journal_init(osb, &dirty); 2414 if (status < 0) { 2415 mlog(ML_ERROR, "Could not initialize journal!\n"); 2416 goto finally; 2417 } 2418 2419 /* Now that journal has been initialized, check to make sure 2420 entire volume is addressable. */ 2421 status = ocfs2_journal_addressable(osb); 2422 if (status) 2423 goto finally; 2424 2425 /* If the journal was unmounted cleanly then we don't want to 2426 * recover anything. Otherwise, journal_load will do that 2427 * dirty work for us :) */ 2428 if (!dirty) { 2429 status = ocfs2_journal_wipe(osb->journal, 0); 2430 if (status < 0) { 2431 mlog_errno(status); 2432 goto finally; 2433 } 2434 } else { 2435 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2436 "unmounted cleanly, recovering it.\n", osb->dev_str); 2437 } 2438 2439 local = ocfs2_mount_local(osb); 2440 2441 /* will play back anything left in the journal. */ 2442 status = ocfs2_journal_load(osb->journal, local, dirty); 2443 if (status < 0) { 2444 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2445 goto finally; 2446 } 2447 2448 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2449 jbd2_journal_set_features(osb->journal->j_journal, 2450 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2451 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2452 else 2453 jbd2_journal_clear_features(osb->journal->j_journal, 2454 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2455 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2456 2457 if (dirty) { 2458 /* recover my local alloc if we didn't unmount cleanly. */ 2459 status = ocfs2_begin_local_alloc_recovery(osb, 2460 osb->slot_num, 2461 &local_alloc); 2462 if (status < 0) { 2463 mlog_errno(status); 2464 goto finally; 2465 } 2466 /* we complete the recovery process after we've marked 2467 * ourselves as mounted. */ 2468 } 2469 2470 status = ocfs2_load_local_alloc(osb); 2471 if (status < 0) { 2472 mlog_errno(status); 2473 goto finally; 2474 } 2475 2476 if (dirty) { 2477 /* Recovery will be completed after we've mounted the 2478 * rest of the volume. */ 2479 osb->local_alloc_copy = local_alloc; 2480 local_alloc = NULL; 2481 } 2482 2483 /* go through each journal, trylock it and if you get the 2484 * lock, and it's marked as dirty, set the bit in the recover 2485 * map and launch a recovery thread for it. */ 2486 status = ocfs2_mark_dead_nodes(osb); 2487 if (status < 0) { 2488 mlog_errno(status); 2489 goto finally; 2490 } 2491 2492 status = ocfs2_compute_replay_slots(osb); 2493 if (status < 0) 2494 mlog_errno(status); 2495 2496 finally: 2497 kfree(local_alloc); 2498 2499 if (status) 2500 mlog_errno(status); 2501 return status; 2502 } 2503 2504 /* 2505 * The routine gets called from dismount or close whenever a dismount on 2506 * volume is requested and the osb open count becomes 1. 2507 * It will remove the osb from the global list and also free up all the 2508 * initialized resources and fileobject. 2509 */ 2510 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2511 { 2512 /* This function assumes that the caller has the main osb resource */ 2513 2514 /* ocfs2_initializer_super have already created this workqueue */ 2515 if (osb->ocfs2_wq) 2516 destroy_workqueue(osb->ocfs2_wq); 2517 2518 ocfs2_free_slot_info(osb); 2519 2520 kfree(osb->osb_orphan_wipes); 2521 kfree(osb->slot_recovery_generations); 2522 /* FIXME 2523 * This belongs in journal shutdown, but because we have to 2524 * allocate osb->journal at the middle of ocfs2_initialize_super(), 2525 * we free it here. 2526 */ 2527 kfree(osb->journal); 2528 kfree(osb->local_alloc_copy); 2529 kfree(osb->uuid_str); 2530 kfree(osb->vol_label); 2531 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2532 memset(osb, 0, sizeof(struct ocfs2_super)); 2533 } 2534 2535 /* Depending on the mount option passed, perform one of the following: 2536 * Put OCFS2 into a readonly state (default) 2537 * Return EIO so that only the process errs 2538 * Fix the error as if fsck.ocfs2 -y 2539 * panic 2540 */ 2541 static int ocfs2_handle_error(struct super_block *sb) 2542 { 2543 struct ocfs2_super *osb = OCFS2_SB(sb); 2544 int rv = 0; 2545 2546 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2547 pr_crit("On-disk corruption discovered. " 2548 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2549 2550 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2551 panic("OCFS2: (device %s): panic forced after error\n", 2552 sb->s_id); 2553 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2554 pr_crit("OCFS2: Returning error to the calling process.\n"); 2555 rv = -EIO; 2556 } else { /* default option */ 2557 rv = -EROFS; 2558 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb))) 2559 return rv; 2560 2561 pr_crit("OCFS2: File system is now read-only.\n"); 2562 sb->s_flags |= SB_RDONLY; 2563 ocfs2_set_ro_flag(osb, 0); 2564 } 2565 2566 return rv; 2567 } 2568 2569 int __ocfs2_error(struct super_block *sb, const char *function, 2570 const char *fmt, ...) 2571 { 2572 struct va_format vaf; 2573 va_list args; 2574 2575 va_start(args, fmt); 2576 vaf.fmt = fmt; 2577 vaf.va = &args; 2578 2579 /* Not using mlog here because we want to show the actual 2580 * function the error came from. */ 2581 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2582 sb->s_id, function, &vaf); 2583 2584 va_end(args); 2585 2586 return ocfs2_handle_error(sb); 2587 } 2588 2589 /* Handle critical errors. This is intentionally more drastic than 2590 * ocfs2_handle_error, so we only use for things like journal errors, 2591 * etc. */ 2592 void __ocfs2_abort(struct super_block *sb, const char *function, 2593 const char *fmt, ...) 2594 { 2595 struct va_format vaf; 2596 va_list args; 2597 2598 va_start(args, fmt); 2599 2600 vaf.fmt = fmt; 2601 vaf.va = &args; 2602 2603 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2604 sb->s_id, function, &vaf); 2605 2606 va_end(args); 2607 2608 /* We don't have the cluster support yet to go straight to 2609 * hard readonly in here. Until then, we want to keep 2610 * ocfs2_abort() so that we can at least mark critical 2611 * errors. 2612 * 2613 * TODO: This should abort the journal and alert other nodes 2614 * that our slot needs recovery. */ 2615 2616 /* Force a panic(). This stinks, but it's better than letting 2617 * things continue without having a proper hard readonly 2618 * here. */ 2619 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2620 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2621 ocfs2_handle_error(sb); 2622 } 2623 2624 /* 2625 * Void signal blockers, because in-kernel sigprocmask() only fails 2626 * when SIG_* is wrong. 2627 */ 2628 void ocfs2_block_signals(sigset_t *oldset) 2629 { 2630 int rc; 2631 sigset_t blocked; 2632 2633 sigfillset(&blocked); 2634 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2635 BUG_ON(rc); 2636 } 2637 2638 void ocfs2_unblock_signals(sigset_t *oldset) 2639 { 2640 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2641 BUG_ON(rc); 2642 } 2643 2644 module_init(ocfs2_init); 2645 module_exit(ocfs2_exit); 2646