1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * super.c 6 * 7 * load/unload driver, mount/dismount volumes 8 * 9 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10 */ 11 12 #include <linux/module.h> 13 #include <linux/fs.h> 14 #include <linux/types.h> 15 #include <linux/slab.h> 16 #include <linux/highmem.h> 17 #include <linux/init.h> 18 #include <linux/random.h> 19 #include <linux/statfs.h> 20 #include <linux/moduleparam.h> 21 #include <linux/blkdev.h> 22 #include <linux/socket.h> 23 #include <linux/inet.h> 24 #include <linux/parser.h> 25 #include <linux/crc32.h> 26 #include <linux/debugfs.h> 27 #include <linux/mount.h> 28 #include <linux/seq_file.h> 29 #include <linux/quotaops.h> 30 #include <linux/cleancache.h> 31 #include <linux/signal.h> 32 33 #define CREATE_TRACE_POINTS 34 #include "ocfs2_trace.h" 35 36 #include <cluster/masklog.h> 37 38 #include "ocfs2.h" 39 40 /* this should be the only file to include a version 1 header */ 41 #include "ocfs1_fs_compat.h" 42 43 #include "alloc.h" 44 #include "aops.h" 45 #include "blockcheck.h" 46 #include "dlmglue.h" 47 #include "export.h" 48 #include "extent_map.h" 49 #include "heartbeat.h" 50 #include "inode.h" 51 #include "journal.h" 52 #include "localalloc.h" 53 #include "namei.h" 54 #include "slot_map.h" 55 #include "super.h" 56 #include "sysfile.h" 57 #include "uptodate.h" 58 #include "xattr.h" 59 #include "quota.h" 60 #include "refcounttree.h" 61 #include "suballoc.h" 62 63 #include "buffer_head_io.h" 64 #include "filecheck.h" 65 66 static struct kmem_cache *ocfs2_inode_cachep; 67 struct kmem_cache *ocfs2_dquot_cachep; 68 struct kmem_cache *ocfs2_qf_chunk_cachep; 69 70 static struct dentry *ocfs2_debugfs_root; 71 72 MODULE_AUTHOR("Oracle"); 73 MODULE_LICENSE("GPL"); 74 MODULE_DESCRIPTION("OCFS2 cluster file system"); 75 76 struct mount_options 77 { 78 unsigned long commit_interval; 79 unsigned long mount_opt; 80 unsigned int atime_quantum; 81 unsigned short slot; 82 int localalloc_opt; 83 unsigned int resv_level; 84 int dir_resv_level; 85 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 86 }; 87 88 static int ocfs2_parse_options(struct super_block *sb, char *options, 89 struct mount_options *mopt, 90 int is_remount); 91 static int ocfs2_check_set_options(struct super_block *sb, 92 struct mount_options *options); 93 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 94 static void ocfs2_put_super(struct super_block *sb); 95 static int ocfs2_mount_volume(struct super_block *sb); 96 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 97 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 98 static int ocfs2_initialize_mem_caches(void); 99 static void ocfs2_free_mem_caches(void); 100 static void ocfs2_delete_osb(struct ocfs2_super *osb); 101 102 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 103 104 static int ocfs2_sync_fs(struct super_block *sb, int wait); 105 106 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 107 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 108 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 109 static int ocfs2_check_volume(struct ocfs2_super *osb); 110 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 111 struct buffer_head *bh, 112 u32 sectsize, 113 struct ocfs2_blockcheck_stats *stats); 114 static int ocfs2_initialize_super(struct super_block *sb, 115 struct buffer_head *bh, 116 int sector_size, 117 struct ocfs2_blockcheck_stats *stats); 118 static int ocfs2_get_sector(struct super_block *sb, 119 struct buffer_head **bh, 120 int block, 121 int sect_size); 122 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 123 static void ocfs2_free_inode(struct inode *inode); 124 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 125 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 126 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 127 128 static struct dquot **ocfs2_get_dquots(struct inode *inode) 129 { 130 return OCFS2_I(inode)->i_dquot; 131 } 132 133 static const struct super_operations ocfs2_sops = { 134 .statfs = ocfs2_statfs, 135 .alloc_inode = ocfs2_alloc_inode, 136 .free_inode = ocfs2_free_inode, 137 .drop_inode = ocfs2_drop_inode, 138 .evict_inode = ocfs2_evict_inode, 139 .sync_fs = ocfs2_sync_fs, 140 .put_super = ocfs2_put_super, 141 .remount_fs = ocfs2_remount, 142 .show_options = ocfs2_show_options, 143 .quota_read = ocfs2_quota_read, 144 .quota_write = ocfs2_quota_write, 145 .get_dquots = ocfs2_get_dquots, 146 }; 147 148 enum { 149 Opt_barrier, 150 Opt_err_panic, 151 Opt_err_ro, 152 Opt_intr, 153 Opt_nointr, 154 Opt_hb_none, 155 Opt_hb_local, 156 Opt_hb_global, 157 Opt_data_ordered, 158 Opt_data_writeback, 159 Opt_atime_quantum, 160 Opt_slot, 161 Opt_commit, 162 Opt_localalloc, 163 Opt_localflocks, 164 Opt_stack, 165 Opt_user_xattr, 166 Opt_nouser_xattr, 167 Opt_inode64, 168 Opt_acl, 169 Opt_noacl, 170 Opt_usrquota, 171 Opt_grpquota, 172 Opt_coherency_buffered, 173 Opt_coherency_full, 174 Opt_resv_level, 175 Opt_dir_resv_level, 176 Opt_journal_async_commit, 177 Opt_err_cont, 178 Opt_nocluster, 179 Opt_err, 180 }; 181 182 static const match_table_t tokens = { 183 {Opt_barrier, "barrier=%u"}, 184 {Opt_err_panic, "errors=panic"}, 185 {Opt_err_ro, "errors=remount-ro"}, 186 {Opt_intr, "intr"}, 187 {Opt_nointr, "nointr"}, 188 {Opt_hb_none, OCFS2_HB_NONE}, 189 {Opt_hb_local, OCFS2_HB_LOCAL}, 190 {Opt_hb_global, OCFS2_HB_GLOBAL}, 191 {Opt_data_ordered, "data=ordered"}, 192 {Opt_data_writeback, "data=writeback"}, 193 {Opt_atime_quantum, "atime_quantum=%u"}, 194 {Opt_slot, "preferred_slot=%u"}, 195 {Opt_commit, "commit=%u"}, 196 {Opt_localalloc, "localalloc=%d"}, 197 {Opt_localflocks, "localflocks"}, 198 {Opt_stack, "cluster_stack=%s"}, 199 {Opt_user_xattr, "user_xattr"}, 200 {Opt_nouser_xattr, "nouser_xattr"}, 201 {Opt_inode64, "inode64"}, 202 {Opt_acl, "acl"}, 203 {Opt_noacl, "noacl"}, 204 {Opt_usrquota, "usrquota"}, 205 {Opt_grpquota, "grpquota"}, 206 {Opt_coherency_buffered, "coherency=buffered"}, 207 {Opt_coherency_full, "coherency=full"}, 208 {Opt_resv_level, "resv_level=%u"}, 209 {Opt_dir_resv_level, "dir_resv_level=%u"}, 210 {Opt_journal_async_commit, "journal_async_commit"}, 211 {Opt_err_cont, "errors=continue"}, 212 {Opt_nocluster, "nocluster"}, 213 {Opt_err, NULL} 214 }; 215 216 #ifdef CONFIG_DEBUG_FS 217 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 218 { 219 struct ocfs2_cluster_connection *cconn = osb->cconn; 220 struct ocfs2_recovery_map *rm = osb->recovery_map; 221 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 222 int i, out = 0; 223 unsigned long flags; 224 225 out += scnprintf(buf + out, len - out, 226 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 227 "Device", osb->dev_str, osb->uuid_str, 228 osb->fs_generation, osb->vol_label); 229 230 out += scnprintf(buf + out, len - out, 231 "%10s => State: %d Flags: 0x%lX\n", "Volume", 232 atomic_read(&osb->vol_state), osb->osb_flags); 233 234 out += scnprintf(buf + out, len - out, 235 "%10s => Block: %lu Cluster: %d\n", "Sizes", 236 osb->sb->s_blocksize, osb->s_clustersize); 237 238 out += scnprintf(buf + out, len - out, 239 "%10s => Compat: 0x%X Incompat: 0x%X " 240 "ROcompat: 0x%X\n", 241 "Features", osb->s_feature_compat, 242 osb->s_feature_incompat, osb->s_feature_ro_compat); 243 244 out += scnprintf(buf + out, len - out, 245 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 246 osb->s_mount_opt, osb->s_atime_quantum); 247 248 if (cconn) { 249 out += scnprintf(buf + out, len - out, 250 "%10s => Stack: %s Name: %*s " 251 "Version: %d.%d\n", "Cluster", 252 (*osb->osb_cluster_stack == '\0' ? 253 "o2cb" : osb->osb_cluster_stack), 254 cconn->cc_namelen, cconn->cc_name, 255 cconn->cc_version.pv_major, 256 cconn->cc_version.pv_minor); 257 } 258 259 spin_lock_irqsave(&osb->dc_task_lock, flags); 260 out += scnprintf(buf + out, len - out, 261 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 262 "WorkSeq: %lu\n", "DownCnvt", 263 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 264 osb->blocked_lock_count, osb->dc_wake_sequence, 265 osb->dc_work_sequence); 266 spin_unlock_irqrestore(&osb->dc_task_lock, flags); 267 268 spin_lock(&osb->osb_lock); 269 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 270 "Recovery", 271 (osb->recovery_thread_task ? 272 task_pid_nr(osb->recovery_thread_task) : -1)); 273 if (rm->rm_used == 0) 274 out += scnprintf(buf + out, len - out, " None\n"); 275 else { 276 for (i = 0; i < rm->rm_used; i++) 277 out += scnprintf(buf + out, len - out, " %d", 278 rm->rm_entries[i]); 279 out += scnprintf(buf + out, len - out, "\n"); 280 } 281 spin_unlock(&osb->osb_lock); 282 283 out += scnprintf(buf + out, len - out, 284 "%10s => Pid: %d Interval: %lu\n", "Commit", 285 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 286 osb->osb_commit_interval); 287 288 out += scnprintf(buf + out, len - out, 289 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 290 "Journal", osb->journal->j_state, 291 osb->journal->j_trans_id, 292 atomic_read(&osb->journal->j_num_trans)); 293 294 out += scnprintf(buf + out, len - out, 295 "%10s => GlobalAllocs: %d LocalAllocs: %d " 296 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 297 "Stats", 298 atomic_read(&osb->alloc_stats.bitmap_data), 299 atomic_read(&osb->alloc_stats.local_data), 300 atomic_read(&osb->alloc_stats.bg_allocs), 301 atomic_read(&osb->alloc_stats.moves), 302 atomic_read(&osb->alloc_stats.bg_extends)); 303 304 out += scnprintf(buf + out, len - out, 305 "%10s => State: %u Descriptor: %llu Size: %u bits " 306 "Default: %u bits\n", 307 "LocalAlloc", osb->local_alloc_state, 308 (unsigned long long)osb->la_last_gd, 309 osb->local_alloc_bits, osb->local_alloc_default_bits); 310 311 spin_lock(&osb->osb_lock); 312 out += scnprintf(buf + out, len - out, 313 "%10s => InodeSlot: %d StolenInodes: %d, " 314 "MetaSlot: %d StolenMeta: %d\n", "Steal", 315 osb->s_inode_steal_slot, 316 atomic_read(&osb->s_num_inodes_stolen), 317 osb->s_meta_steal_slot, 318 atomic_read(&osb->s_num_meta_stolen)); 319 spin_unlock(&osb->osb_lock); 320 321 out += scnprintf(buf + out, len - out, "OrphanScan => "); 322 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ", 323 os->os_count, os->os_seqno); 324 out += scnprintf(buf + out, len - out, " Last Scan: "); 325 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 326 out += scnprintf(buf + out, len - out, "Disabled\n"); 327 else 328 out += scnprintf(buf + out, len - out, "%lu seconds ago\n", 329 (unsigned long)(ktime_get_seconds() - os->os_scantime)); 330 331 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n", 332 "Slots", "Num", "RecoGen"); 333 for (i = 0; i < osb->max_slots; ++i) { 334 out += scnprintf(buf + out, len - out, 335 "%10s %c %3d %10d\n", 336 " ", 337 (i == osb->slot_num ? '*' : ' '), 338 i, osb->slot_recovery_generations[i]); 339 } 340 341 return out; 342 } 343 344 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 345 { 346 struct ocfs2_super *osb = inode->i_private; 347 char *buf = NULL; 348 349 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 350 if (!buf) 351 goto bail; 352 353 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 354 355 file->private_data = buf; 356 357 return 0; 358 bail: 359 return -ENOMEM; 360 } 361 362 static int ocfs2_debug_release(struct inode *inode, struct file *file) 363 { 364 kfree(file->private_data); 365 return 0; 366 } 367 368 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 369 size_t nbytes, loff_t *ppos) 370 { 371 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 372 i_size_read(file->f_mapping->host)); 373 } 374 #else 375 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 376 { 377 return 0; 378 } 379 static int ocfs2_debug_release(struct inode *inode, struct file *file) 380 { 381 return 0; 382 } 383 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 384 size_t nbytes, loff_t *ppos) 385 { 386 return 0; 387 } 388 #endif /* CONFIG_DEBUG_FS */ 389 390 static const struct file_operations ocfs2_osb_debug_fops = { 391 .open = ocfs2_osb_debug_open, 392 .release = ocfs2_debug_release, 393 .read = ocfs2_debug_read, 394 .llseek = generic_file_llseek, 395 }; 396 397 static int ocfs2_sync_fs(struct super_block *sb, int wait) 398 { 399 int status; 400 tid_t target; 401 struct ocfs2_super *osb = OCFS2_SB(sb); 402 403 if (ocfs2_is_hard_readonly(osb)) 404 return -EROFS; 405 406 if (wait) { 407 status = ocfs2_flush_truncate_log(osb); 408 if (status < 0) 409 mlog_errno(status); 410 } else { 411 ocfs2_schedule_truncate_log_flush(osb, 0); 412 } 413 414 if (jbd2_journal_start_commit(osb->journal->j_journal, 415 &target)) { 416 if (wait) 417 jbd2_log_wait_commit(osb->journal->j_journal, 418 target); 419 } 420 return 0; 421 } 422 423 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 424 { 425 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 426 && (ino == USER_QUOTA_SYSTEM_INODE 427 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 428 return 0; 429 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 430 && (ino == GROUP_QUOTA_SYSTEM_INODE 431 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 432 return 0; 433 return 1; 434 } 435 436 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 437 { 438 struct inode *new = NULL; 439 int status = 0; 440 int i; 441 442 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 443 if (IS_ERR(new)) { 444 status = PTR_ERR(new); 445 mlog_errno(status); 446 goto bail; 447 } 448 osb->root_inode = new; 449 450 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 451 if (IS_ERR(new)) { 452 status = PTR_ERR(new); 453 mlog_errno(status); 454 goto bail; 455 } 456 osb->sys_root_inode = new; 457 458 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 459 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 460 if (!ocfs2_need_system_inode(osb, i)) 461 continue; 462 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 463 if (!new) { 464 ocfs2_release_system_inodes(osb); 465 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 466 mlog_errno(status); 467 mlog(ML_ERROR, "Unable to load system inode %d, " 468 "possibly corrupt fs?", i); 469 goto bail; 470 } 471 // the array now has one ref, so drop this one 472 iput(new); 473 } 474 475 bail: 476 if (status) 477 mlog_errno(status); 478 return status; 479 } 480 481 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 482 { 483 struct inode *new = NULL; 484 int status = 0; 485 int i; 486 487 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 488 i < NUM_SYSTEM_INODES; 489 i++) { 490 if (!ocfs2_need_system_inode(osb, i)) 491 continue; 492 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 493 if (!new) { 494 ocfs2_release_system_inodes(osb); 495 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 496 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 497 status, i, osb->slot_num); 498 goto bail; 499 } 500 /* the array now has one ref, so drop this one */ 501 iput(new); 502 } 503 504 bail: 505 if (status) 506 mlog_errno(status); 507 return status; 508 } 509 510 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 511 { 512 int i; 513 struct inode *inode; 514 515 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 516 inode = osb->global_system_inodes[i]; 517 if (inode) { 518 iput(inode); 519 osb->global_system_inodes[i] = NULL; 520 } 521 } 522 523 inode = osb->sys_root_inode; 524 if (inode) { 525 iput(inode); 526 osb->sys_root_inode = NULL; 527 } 528 529 inode = osb->root_inode; 530 if (inode) { 531 iput(inode); 532 osb->root_inode = NULL; 533 } 534 535 if (!osb->local_system_inodes) 536 return; 537 538 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 539 if (osb->local_system_inodes[i]) { 540 iput(osb->local_system_inodes[i]); 541 osb->local_system_inodes[i] = NULL; 542 } 543 } 544 545 kfree(osb->local_system_inodes); 546 osb->local_system_inodes = NULL; 547 } 548 549 /* We're allocating fs objects, use GFP_NOFS */ 550 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 551 { 552 struct ocfs2_inode_info *oi; 553 554 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 555 if (!oi) 556 return NULL; 557 558 oi->i_sync_tid = 0; 559 oi->i_datasync_tid = 0; 560 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 561 562 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 563 return &oi->vfs_inode; 564 } 565 566 static void ocfs2_free_inode(struct inode *inode) 567 { 568 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 569 } 570 571 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 572 unsigned int cbits) 573 { 574 unsigned int bytes = 1 << cbits; 575 unsigned int trim = bytes; 576 unsigned int bitshift = 32; 577 578 /* 579 * i_size and all block offsets in ocfs2 are always 64 bits 580 * wide. i_clusters is 32 bits, in cluster-sized units. So on 581 * 64 bit platforms, cluster size will be the limiting factor. 582 */ 583 584 #if BITS_PER_LONG == 32 585 BUILD_BUG_ON(sizeof(sector_t) != 8); 586 /* 587 * We might be limited by page cache size. 588 */ 589 if (bytes > PAGE_SIZE) { 590 bytes = PAGE_SIZE; 591 trim = 1; 592 /* 593 * Shift by 31 here so that we don't get larger than 594 * MAX_LFS_FILESIZE 595 */ 596 bitshift = 31; 597 } 598 #endif 599 600 /* 601 * Trim by a whole cluster when we can actually approach the 602 * on-disk limits. Otherwise we can overflow i_clusters when 603 * an extent start is at the max offset. 604 */ 605 return (((unsigned long long)bytes) << bitshift) - trim; 606 } 607 608 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 609 { 610 int incompat_features; 611 int ret = 0; 612 struct mount_options parsed_options; 613 struct ocfs2_super *osb = OCFS2_SB(sb); 614 u32 tmp; 615 616 sync_filesystem(sb); 617 618 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 619 !ocfs2_check_set_options(sb, &parsed_options)) { 620 ret = -EINVAL; 621 goto out; 622 } 623 624 tmp = OCFS2_MOUNT_NOCLUSTER; 625 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 626 ret = -EINVAL; 627 mlog(ML_ERROR, "Cannot change nocluster option on remount\n"); 628 goto out; 629 } 630 631 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 632 OCFS2_MOUNT_HB_NONE; 633 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 634 ret = -EINVAL; 635 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 636 goto out; 637 } 638 639 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 640 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 641 ret = -EINVAL; 642 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 643 goto out; 644 } 645 646 /* Probably don't want this on remount; it might 647 * mess with other nodes */ 648 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 649 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 650 ret = -EINVAL; 651 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 652 goto out; 653 } 654 655 /* We're going to/from readonly mode. */ 656 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 657 /* Disable quota accounting before remounting RO */ 658 if (*flags & SB_RDONLY) { 659 ret = ocfs2_susp_quotas(osb, 0); 660 if (ret < 0) 661 goto out; 662 } 663 /* Lock here so the check of HARD_RO and the potential 664 * setting of SOFT_RO is atomic. */ 665 spin_lock(&osb->osb_lock); 666 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 667 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 668 ret = -EROFS; 669 goto unlock_osb; 670 } 671 672 if (*flags & SB_RDONLY) { 673 sb->s_flags |= SB_RDONLY; 674 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 675 } else { 676 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 677 mlog(ML_ERROR, "Cannot remount RDWR " 678 "filesystem due to previous errors.\n"); 679 ret = -EROFS; 680 goto unlock_osb; 681 } 682 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 683 if (incompat_features) { 684 mlog(ML_ERROR, "Cannot remount RDWR because " 685 "of unsupported optional features " 686 "(%x).\n", incompat_features); 687 ret = -EINVAL; 688 goto unlock_osb; 689 } 690 sb->s_flags &= ~SB_RDONLY; 691 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 692 } 693 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 694 unlock_osb: 695 spin_unlock(&osb->osb_lock); 696 /* Enable quota accounting after remounting RW */ 697 if (!ret && !(*flags & SB_RDONLY)) { 698 if (sb_any_quota_suspended(sb)) 699 ret = ocfs2_susp_quotas(osb, 1); 700 else 701 ret = ocfs2_enable_quotas(osb); 702 if (ret < 0) { 703 /* Return back changes... */ 704 spin_lock(&osb->osb_lock); 705 sb->s_flags |= SB_RDONLY; 706 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 707 spin_unlock(&osb->osb_lock); 708 goto out; 709 } 710 } 711 } 712 713 if (!ret) { 714 /* Only save off the new mount options in case of a successful 715 * remount. */ 716 osb->s_mount_opt = parsed_options.mount_opt; 717 osb->s_atime_quantum = parsed_options.atime_quantum; 718 osb->preferred_slot = parsed_options.slot; 719 if (parsed_options.commit_interval) 720 osb->osb_commit_interval = parsed_options.commit_interval; 721 722 if (!ocfs2_is_hard_readonly(osb)) 723 ocfs2_set_journal_params(osb); 724 725 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 726 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 727 SB_POSIXACL : 0); 728 } 729 out: 730 return ret; 731 } 732 733 static int ocfs2_sb_probe(struct super_block *sb, 734 struct buffer_head **bh, 735 int *sector_size, 736 struct ocfs2_blockcheck_stats *stats) 737 { 738 int status, tmpstat; 739 struct ocfs1_vol_disk_hdr *hdr; 740 struct ocfs2_dinode *di; 741 int blksize; 742 743 *bh = NULL; 744 745 /* may be > 512 */ 746 *sector_size = bdev_logical_block_size(sb->s_bdev); 747 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 748 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 749 *sector_size, OCFS2_MAX_BLOCKSIZE); 750 status = -EINVAL; 751 goto bail; 752 } 753 754 /* Can this really happen? */ 755 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 756 *sector_size = OCFS2_MIN_BLOCKSIZE; 757 758 /* check block zero for old format */ 759 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 760 if (status < 0) { 761 mlog_errno(status); 762 goto bail; 763 } 764 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 765 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 766 mlog(ML_ERROR, "incompatible version: %u.%u\n", 767 hdr->major_version, hdr->minor_version); 768 status = -EINVAL; 769 } 770 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 771 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 772 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 773 hdr->signature); 774 status = -EINVAL; 775 } 776 brelse(*bh); 777 *bh = NULL; 778 if (status < 0) { 779 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 780 "upgraded before mounting with ocfs v2\n"); 781 goto bail; 782 } 783 784 /* 785 * Now check at magic offset for 512, 1024, 2048, 4096 786 * blocksizes. 4096 is the maximum blocksize because it is 787 * the minimum clustersize. 788 */ 789 status = -EINVAL; 790 for (blksize = *sector_size; 791 blksize <= OCFS2_MAX_BLOCKSIZE; 792 blksize <<= 1) { 793 tmpstat = ocfs2_get_sector(sb, bh, 794 OCFS2_SUPER_BLOCK_BLKNO, 795 blksize); 796 if (tmpstat < 0) { 797 status = tmpstat; 798 mlog_errno(status); 799 break; 800 } 801 di = (struct ocfs2_dinode *) (*bh)->b_data; 802 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 803 spin_lock_init(&stats->b_lock); 804 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 805 if (tmpstat < 0) { 806 brelse(*bh); 807 *bh = NULL; 808 } 809 if (tmpstat != -EAGAIN) { 810 status = tmpstat; 811 break; 812 } 813 } 814 815 bail: 816 return status; 817 } 818 819 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 820 { 821 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 822 823 if (osb->s_mount_opt & hb_enabled) { 824 if (ocfs2_mount_local(osb)) { 825 mlog(ML_ERROR, "Cannot heartbeat on a locally " 826 "mounted device.\n"); 827 return -EINVAL; 828 } 829 if (ocfs2_userspace_stack(osb)) { 830 mlog(ML_ERROR, "Userspace stack expected, but " 831 "o2cb heartbeat arguments passed to mount\n"); 832 return -EINVAL; 833 } 834 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 835 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 836 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 837 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 838 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 839 return -EINVAL; 840 } 841 } 842 843 if (!(osb->s_mount_opt & hb_enabled)) { 844 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 845 !ocfs2_userspace_stack(osb)) { 846 mlog(ML_ERROR, "Heartbeat has to be started to mount " 847 "a read-write clustered device.\n"); 848 return -EINVAL; 849 } 850 } 851 852 return 0; 853 } 854 855 /* 856 * If we're using a userspace stack, mount should have passed 857 * a name that matches the disk. If not, mount should not 858 * have passed a stack. 859 */ 860 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 861 struct mount_options *mopt) 862 { 863 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 864 mlog(ML_ERROR, 865 "cluster stack passed to mount, but this filesystem " 866 "does not support it\n"); 867 return -EINVAL; 868 } 869 870 if (ocfs2_userspace_stack(osb) && 871 !(osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) && 872 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 873 OCFS2_STACK_LABEL_LEN)) { 874 mlog(ML_ERROR, 875 "cluster stack passed to mount (\"%s\") does not " 876 "match the filesystem (\"%s\")\n", 877 mopt->cluster_stack, 878 osb->osb_cluster_stack); 879 return -EINVAL; 880 } 881 882 return 0; 883 } 884 885 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 886 { 887 int type; 888 struct super_block *sb = osb->sb; 889 unsigned int feature[OCFS2_MAXQUOTAS] = { 890 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 891 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 892 int status = 0; 893 894 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 895 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 896 continue; 897 if (unsuspend) 898 status = dquot_resume(sb, type); 899 else { 900 struct ocfs2_mem_dqinfo *oinfo; 901 902 /* Cancel periodic syncing before suspending */ 903 oinfo = sb_dqinfo(sb, type)->dqi_priv; 904 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 905 status = dquot_suspend(sb, type); 906 } 907 if (status < 0) 908 break; 909 } 910 if (status < 0) 911 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 912 "remount (error = %d).\n", status); 913 return status; 914 } 915 916 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 917 { 918 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 919 struct super_block *sb = osb->sb; 920 unsigned int feature[OCFS2_MAXQUOTAS] = { 921 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 922 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 923 unsigned int ino[OCFS2_MAXQUOTAS] = { 924 LOCAL_USER_QUOTA_SYSTEM_INODE, 925 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 926 int status; 927 int type; 928 929 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 930 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 931 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 932 continue; 933 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 934 osb->slot_num); 935 if (!inode[type]) { 936 status = -ENOENT; 937 goto out_quota_off; 938 } 939 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2, 940 DQUOT_USAGE_ENABLED); 941 if (status < 0) 942 goto out_quota_off; 943 } 944 945 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 946 iput(inode[type]); 947 return 0; 948 out_quota_off: 949 ocfs2_disable_quotas(osb); 950 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 951 iput(inode[type]); 952 mlog_errno(status); 953 return status; 954 } 955 956 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 957 { 958 int type; 959 struct inode *inode; 960 struct super_block *sb = osb->sb; 961 struct ocfs2_mem_dqinfo *oinfo; 962 963 /* We mostly ignore errors in this function because there's not much 964 * we can do when we see them */ 965 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 966 if (!sb_has_quota_loaded(sb, type)) 967 continue; 968 oinfo = sb_dqinfo(sb, type)->dqi_priv; 969 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 970 inode = igrab(sb->s_dquot.files[type]); 971 /* Turn off quotas. This will remove all dquot structures from 972 * memory and so they will be automatically synced to global 973 * quota files */ 974 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 975 DQUOT_LIMITS_ENABLED); 976 if (!inode) 977 continue; 978 iput(inode); 979 } 980 } 981 982 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 983 { 984 struct dentry *root; 985 int status, sector_size; 986 struct mount_options parsed_options; 987 struct inode *inode = NULL; 988 struct ocfs2_super *osb = NULL; 989 struct buffer_head *bh = NULL; 990 char nodestr[12]; 991 struct ocfs2_blockcheck_stats stats; 992 993 trace_ocfs2_fill_super(sb, data, silent); 994 995 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 996 status = -EINVAL; 997 goto read_super_error; 998 } 999 1000 /* probe for superblock */ 1001 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1002 if (status < 0) { 1003 mlog(ML_ERROR, "superblock probe failed!\n"); 1004 goto read_super_error; 1005 } 1006 1007 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1008 osb = OCFS2_SB(sb); 1009 if (status < 0) { 1010 mlog_errno(status); 1011 goto read_super_error; 1012 } 1013 brelse(bh); 1014 bh = NULL; 1015 1016 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1017 status = -EINVAL; 1018 goto read_super_error; 1019 } 1020 osb->s_mount_opt = parsed_options.mount_opt; 1021 osb->s_atime_quantum = parsed_options.atime_quantum; 1022 osb->preferred_slot = parsed_options.slot; 1023 osb->osb_commit_interval = parsed_options.commit_interval; 1024 1025 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1026 osb->osb_resv_level = parsed_options.resv_level; 1027 osb->osb_dir_resv_level = parsed_options.resv_level; 1028 if (parsed_options.dir_resv_level == -1) 1029 osb->osb_dir_resv_level = parsed_options.resv_level; 1030 else 1031 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1032 1033 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1034 if (status) 1035 goto read_super_error; 1036 1037 sb->s_magic = OCFS2_SUPER_MAGIC; 1038 1039 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) | 1040 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0); 1041 1042 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY, 1043 * heartbeat=none */ 1044 if (bdev_read_only(sb->s_bdev)) { 1045 if (!sb_rdonly(sb)) { 1046 status = -EACCES; 1047 mlog(ML_ERROR, "Readonly device detected but readonly " 1048 "mount was not specified.\n"); 1049 goto read_super_error; 1050 } 1051 1052 /* You should not be able to start a local heartbeat 1053 * on a readonly device. */ 1054 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1055 status = -EROFS; 1056 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1057 "device.\n"); 1058 goto read_super_error; 1059 } 1060 1061 status = ocfs2_check_journals_nolocks(osb); 1062 if (status < 0) { 1063 if (status == -EROFS) 1064 mlog(ML_ERROR, "Recovery required on readonly " 1065 "file system, but write access is " 1066 "unavailable.\n"); 1067 else 1068 mlog_errno(status); 1069 goto read_super_error; 1070 } 1071 1072 ocfs2_set_ro_flag(osb, 1); 1073 1074 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1075 "Cluster services will not be used for this mount. " 1076 "Recovery will be skipped.\n", osb->dev_str); 1077 } 1078 1079 if (!ocfs2_is_hard_readonly(osb)) { 1080 if (sb_rdonly(sb)) 1081 ocfs2_set_ro_flag(osb, 0); 1082 } 1083 1084 status = ocfs2_verify_heartbeat(osb); 1085 if (status < 0) { 1086 mlog_errno(status); 1087 goto read_super_error; 1088 } 1089 1090 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1091 ocfs2_debugfs_root); 1092 1093 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root, 1094 osb, &ocfs2_osb_debug_fops); 1095 1096 if (ocfs2_meta_ecc(osb)) 1097 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats, 1098 osb->osb_debug_root); 1099 1100 status = ocfs2_mount_volume(sb); 1101 if (status < 0) 1102 goto read_super_error; 1103 1104 if (osb->root_inode) 1105 inode = igrab(osb->root_inode); 1106 1107 if (!inode) { 1108 status = -EIO; 1109 mlog_errno(status); 1110 goto read_super_error; 1111 } 1112 1113 root = d_make_root(inode); 1114 if (!root) { 1115 status = -ENOMEM; 1116 mlog_errno(status); 1117 goto read_super_error; 1118 } 1119 1120 sb->s_root = root; 1121 1122 ocfs2_complete_mount_recovery(osb); 1123 1124 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL, 1125 &ocfs2_kset->kobj); 1126 if (!osb->osb_dev_kset) { 1127 status = -ENOMEM; 1128 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id); 1129 goto read_super_error; 1130 } 1131 1132 /* Create filecheck sysfs related directories/files at 1133 * /sys/fs/ocfs2/<devname>/filecheck */ 1134 if (ocfs2_filecheck_create_sysfs(osb)) { 1135 status = -ENOMEM; 1136 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at " 1137 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id); 1138 goto read_super_error; 1139 } 1140 1141 if (ocfs2_mount_local(osb)) 1142 snprintf(nodestr, sizeof(nodestr), "local"); 1143 else 1144 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1145 1146 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1147 "with %s data mode.\n", 1148 osb->dev_str, nodestr, osb->slot_num, 1149 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1150 "ordered"); 1151 1152 if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) && 1153 !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT)) 1154 printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted " 1155 "without cluster aware mode.\n", osb->dev_str); 1156 1157 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1158 wake_up(&osb->osb_mount_event); 1159 1160 /* Now we can initialize quotas because we can afford to wait 1161 * for cluster locks recovery now. That also means that truncation 1162 * log recovery can happen but that waits for proper quota setup */ 1163 if (!sb_rdonly(sb)) { 1164 status = ocfs2_enable_quotas(osb); 1165 if (status < 0) { 1166 /* We have to err-out specially here because 1167 * s_root is already set */ 1168 mlog_errno(status); 1169 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1170 wake_up(&osb->osb_mount_event); 1171 return status; 1172 } 1173 } 1174 1175 ocfs2_complete_quota_recovery(osb); 1176 1177 /* Now we wake up again for processes waiting for quotas */ 1178 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1179 wake_up(&osb->osb_mount_event); 1180 1181 /* Start this when the mount is almost sure of being successful */ 1182 ocfs2_orphan_scan_start(osb); 1183 1184 return status; 1185 1186 read_super_error: 1187 brelse(bh); 1188 1189 if (status) 1190 mlog_errno(status); 1191 1192 if (osb) { 1193 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1194 wake_up(&osb->osb_mount_event); 1195 ocfs2_dismount_volume(sb, 1); 1196 } 1197 1198 return status; 1199 } 1200 1201 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1202 int flags, 1203 const char *dev_name, 1204 void *data) 1205 { 1206 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1207 } 1208 1209 static struct file_system_type ocfs2_fs_type = { 1210 .owner = THIS_MODULE, 1211 .name = "ocfs2", 1212 .mount = ocfs2_mount, 1213 .kill_sb = kill_block_super, 1214 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1215 .next = NULL 1216 }; 1217 MODULE_ALIAS_FS("ocfs2"); 1218 1219 static int ocfs2_check_set_options(struct super_block *sb, 1220 struct mount_options *options) 1221 { 1222 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1223 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1224 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1225 mlog(ML_ERROR, "User quotas were requested, but this " 1226 "filesystem does not have the feature enabled.\n"); 1227 return 0; 1228 } 1229 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1230 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1231 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1232 mlog(ML_ERROR, "Group quotas were requested, but this " 1233 "filesystem does not have the feature enabled.\n"); 1234 return 0; 1235 } 1236 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1237 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1238 mlog(ML_ERROR, "ACL support requested but extended attributes " 1239 "feature is not enabled\n"); 1240 return 0; 1241 } 1242 /* No ACL setting specified? Use XATTR feature... */ 1243 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1244 OCFS2_MOUNT_NO_POSIX_ACL))) { 1245 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1246 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1247 else 1248 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1249 } 1250 return 1; 1251 } 1252 1253 static int ocfs2_parse_options(struct super_block *sb, 1254 char *options, 1255 struct mount_options *mopt, 1256 int is_remount) 1257 { 1258 int status, user_stack = 0; 1259 char *p; 1260 u32 tmp; 1261 int token, option; 1262 substring_t args[MAX_OPT_ARGS]; 1263 1264 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1265 1266 mopt->commit_interval = 0; 1267 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1268 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1269 mopt->slot = OCFS2_INVALID_SLOT; 1270 mopt->localalloc_opt = -1; 1271 mopt->cluster_stack[0] = '\0'; 1272 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1273 mopt->dir_resv_level = -1; 1274 1275 if (!options) { 1276 status = 1; 1277 goto bail; 1278 } 1279 1280 while ((p = strsep(&options, ",")) != NULL) { 1281 if (!*p) 1282 continue; 1283 1284 token = match_token(p, tokens, args); 1285 switch (token) { 1286 case Opt_hb_local: 1287 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1288 break; 1289 case Opt_hb_none: 1290 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1291 break; 1292 case Opt_hb_global: 1293 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1294 break; 1295 case Opt_barrier: 1296 if (match_int(&args[0], &option)) { 1297 status = 0; 1298 goto bail; 1299 } 1300 if (option) 1301 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1302 else 1303 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1304 break; 1305 case Opt_intr: 1306 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1307 break; 1308 case Opt_nointr: 1309 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1310 break; 1311 case Opt_err_panic: 1312 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1313 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1314 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1315 break; 1316 case Opt_err_ro: 1317 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1318 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1319 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1320 break; 1321 case Opt_err_cont: 1322 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1323 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1324 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1325 break; 1326 case Opt_data_ordered: 1327 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1328 break; 1329 case Opt_data_writeback: 1330 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1331 break; 1332 case Opt_user_xattr: 1333 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1334 break; 1335 case Opt_nouser_xattr: 1336 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1337 break; 1338 case Opt_atime_quantum: 1339 if (match_int(&args[0], &option)) { 1340 status = 0; 1341 goto bail; 1342 } 1343 if (option >= 0) 1344 mopt->atime_quantum = option; 1345 break; 1346 case Opt_slot: 1347 if (match_int(&args[0], &option)) { 1348 status = 0; 1349 goto bail; 1350 } 1351 if (option) 1352 mopt->slot = (u16)option; 1353 break; 1354 case Opt_commit: 1355 if (match_int(&args[0], &option)) { 1356 status = 0; 1357 goto bail; 1358 } 1359 if (option < 0) 1360 return 0; 1361 if (option == 0) 1362 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1363 mopt->commit_interval = HZ * option; 1364 break; 1365 case Opt_localalloc: 1366 if (match_int(&args[0], &option)) { 1367 status = 0; 1368 goto bail; 1369 } 1370 if (option >= 0) 1371 mopt->localalloc_opt = option; 1372 break; 1373 case Opt_localflocks: 1374 /* 1375 * Changing this during remount could race 1376 * flock() requests, or "unbalance" existing 1377 * ones (e.g., a lock is taken in one mode but 1378 * dropped in the other). If users care enough 1379 * to flip locking modes during remount, we 1380 * could add a "local" flag to individual 1381 * flock structures for proper tracking of 1382 * state. 1383 */ 1384 if (!is_remount) 1385 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1386 break; 1387 case Opt_stack: 1388 /* Check both that the option we were passed 1389 * is of the right length and that it is a proper 1390 * string of the right length. 1391 */ 1392 if (((args[0].to - args[0].from) != 1393 OCFS2_STACK_LABEL_LEN) || 1394 (strnlen(args[0].from, 1395 OCFS2_STACK_LABEL_LEN) != 1396 OCFS2_STACK_LABEL_LEN)) { 1397 mlog(ML_ERROR, 1398 "Invalid cluster_stack option\n"); 1399 status = 0; 1400 goto bail; 1401 } 1402 memcpy(mopt->cluster_stack, args[0].from, 1403 OCFS2_STACK_LABEL_LEN); 1404 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1405 /* 1406 * Open code the memcmp here as we don't have 1407 * an osb to pass to 1408 * ocfs2_userspace_stack(). 1409 */ 1410 if (memcmp(mopt->cluster_stack, 1411 OCFS2_CLASSIC_CLUSTER_STACK, 1412 OCFS2_STACK_LABEL_LEN)) 1413 user_stack = 1; 1414 break; 1415 case Opt_inode64: 1416 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1417 break; 1418 case Opt_usrquota: 1419 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1420 break; 1421 case Opt_grpquota: 1422 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1423 break; 1424 case Opt_coherency_buffered: 1425 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1426 break; 1427 case Opt_coherency_full: 1428 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1429 break; 1430 case Opt_acl: 1431 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1432 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1433 break; 1434 case Opt_noacl: 1435 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1436 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1437 break; 1438 case Opt_resv_level: 1439 if (is_remount) 1440 break; 1441 if (match_int(&args[0], &option)) { 1442 status = 0; 1443 goto bail; 1444 } 1445 if (option >= OCFS2_MIN_RESV_LEVEL && 1446 option < OCFS2_MAX_RESV_LEVEL) 1447 mopt->resv_level = option; 1448 break; 1449 case Opt_dir_resv_level: 1450 if (is_remount) 1451 break; 1452 if (match_int(&args[0], &option)) { 1453 status = 0; 1454 goto bail; 1455 } 1456 if (option >= OCFS2_MIN_RESV_LEVEL && 1457 option < OCFS2_MAX_RESV_LEVEL) 1458 mopt->dir_resv_level = option; 1459 break; 1460 case Opt_journal_async_commit: 1461 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1462 break; 1463 case Opt_nocluster: 1464 mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER; 1465 break; 1466 default: 1467 mlog(ML_ERROR, 1468 "Unrecognized mount option \"%s\" " 1469 "or missing value\n", p); 1470 status = 0; 1471 goto bail; 1472 } 1473 } 1474 1475 if (user_stack == 0) { 1476 /* Ensure only one heartbeat mode */ 1477 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1478 OCFS2_MOUNT_HB_GLOBAL | 1479 OCFS2_MOUNT_HB_NONE); 1480 if (hweight32(tmp) != 1) { 1481 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1482 status = 0; 1483 goto bail; 1484 } 1485 } 1486 1487 status = 1; 1488 1489 bail: 1490 return status; 1491 } 1492 1493 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1494 { 1495 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1496 unsigned long opts = osb->s_mount_opt; 1497 unsigned int local_alloc_megs; 1498 1499 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1500 seq_printf(s, ",_netdev"); 1501 if (opts & OCFS2_MOUNT_HB_LOCAL) 1502 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1503 else 1504 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1505 } else 1506 seq_printf(s, ",%s", OCFS2_HB_NONE); 1507 1508 if (opts & OCFS2_MOUNT_NOINTR) 1509 seq_printf(s, ",nointr"); 1510 1511 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1512 seq_printf(s, ",data=writeback"); 1513 else 1514 seq_printf(s, ",data=ordered"); 1515 1516 if (opts & OCFS2_MOUNT_BARRIER) 1517 seq_printf(s, ",barrier=1"); 1518 1519 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1520 seq_printf(s, ",errors=panic"); 1521 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1522 seq_printf(s, ",errors=continue"); 1523 else 1524 seq_printf(s, ",errors=remount-ro"); 1525 1526 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1527 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1528 1529 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1530 1531 if (osb->osb_commit_interval) 1532 seq_printf(s, ",commit=%u", 1533 (unsigned) (osb->osb_commit_interval / HZ)); 1534 1535 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1536 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1537 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1538 1539 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1540 seq_printf(s, ",localflocks,"); 1541 1542 if (osb->osb_cluster_stack[0]) 1543 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1544 OCFS2_STACK_LABEL_LEN); 1545 if (opts & OCFS2_MOUNT_USRQUOTA) 1546 seq_printf(s, ",usrquota"); 1547 if (opts & OCFS2_MOUNT_GRPQUOTA) 1548 seq_printf(s, ",grpquota"); 1549 1550 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1551 seq_printf(s, ",coherency=buffered"); 1552 else 1553 seq_printf(s, ",coherency=full"); 1554 1555 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1556 seq_printf(s, ",nouser_xattr"); 1557 else 1558 seq_printf(s, ",user_xattr"); 1559 1560 if (opts & OCFS2_MOUNT_INODE64) 1561 seq_printf(s, ",inode64"); 1562 1563 if (opts & OCFS2_MOUNT_POSIX_ACL) 1564 seq_printf(s, ",acl"); 1565 else 1566 seq_printf(s, ",noacl"); 1567 1568 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1569 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1570 1571 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1572 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1573 1574 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1575 seq_printf(s, ",journal_async_commit"); 1576 1577 if (opts & OCFS2_MOUNT_NOCLUSTER) 1578 seq_printf(s, ",nocluster"); 1579 1580 return 0; 1581 } 1582 1583 static int __init ocfs2_init(void) 1584 { 1585 int status; 1586 1587 status = init_ocfs2_uptodate_cache(); 1588 if (status < 0) 1589 goto out1; 1590 1591 status = ocfs2_initialize_mem_caches(); 1592 if (status < 0) 1593 goto out2; 1594 1595 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1596 1597 ocfs2_set_locking_protocol(); 1598 1599 status = register_quota_format(&ocfs2_quota_format); 1600 if (status < 0) 1601 goto out3; 1602 status = register_filesystem(&ocfs2_fs_type); 1603 if (!status) 1604 return 0; 1605 1606 unregister_quota_format(&ocfs2_quota_format); 1607 out3: 1608 debugfs_remove(ocfs2_debugfs_root); 1609 ocfs2_free_mem_caches(); 1610 out2: 1611 exit_ocfs2_uptodate_cache(); 1612 out1: 1613 mlog_errno(status); 1614 return status; 1615 } 1616 1617 static void __exit ocfs2_exit(void) 1618 { 1619 unregister_quota_format(&ocfs2_quota_format); 1620 1621 debugfs_remove(ocfs2_debugfs_root); 1622 1623 ocfs2_free_mem_caches(); 1624 1625 unregister_filesystem(&ocfs2_fs_type); 1626 1627 exit_ocfs2_uptodate_cache(); 1628 } 1629 1630 static void ocfs2_put_super(struct super_block *sb) 1631 { 1632 trace_ocfs2_put_super(sb); 1633 1634 ocfs2_sync_blockdev(sb); 1635 ocfs2_dismount_volume(sb, 0); 1636 } 1637 1638 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1639 { 1640 struct ocfs2_super *osb; 1641 u32 numbits, freebits; 1642 int status; 1643 struct ocfs2_dinode *bm_lock; 1644 struct buffer_head *bh = NULL; 1645 struct inode *inode = NULL; 1646 1647 trace_ocfs2_statfs(dentry->d_sb, buf); 1648 1649 osb = OCFS2_SB(dentry->d_sb); 1650 1651 inode = ocfs2_get_system_file_inode(osb, 1652 GLOBAL_BITMAP_SYSTEM_INODE, 1653 OCFS2_INVALID_SLOT); 1654 if (!inode) { 1655 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1656 status = -EIO; 1657 goto bail; 1658 } 1659 1660 status = ocfs2_inode_lock(inode, &bh, 0); 1661 if (status < 0) { 1662 mlog_errno(status); 1663 goto bail; 1664 } 1665 1666 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1667 1668 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1669 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1670 1671 buf->f_type = OCFS2_SUPER_MAGIC; 1672 buf->f_bsize = dentry->d_sb->s_blocksize; 1673 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1674 buf->f_blocks = ((sector_t) numbits) * 1675 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1676 buf->f_bfree = ((sector_t) freebits) * 1677 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1678 buf->f_bavail = buf->f_bfree; 1679 buf->f_files = numbits; 1680 buf->f_ffree = freebits; 1681 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1682 & 0xFFFFFFFFUL; 1683 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1684 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1685 1686 brelse(bh); 1687 1688 ocfs2_inode_unlock(inode, 0); 1689 status = 0; 1690 bail: 1691 iput(inode); 1692 1693 if (status) 1694 mlog_errno(status); 1695 1696 return status; 1697 } 1698 1699 static void ocfs2_inode_init_once(void *data) 1700 { 1701 struct ocfs2_inode_info *oi = data; 1702 1703 oi->ip_flags = 0; 1704 oi->ip_open_count = 0; 1705 spin_lock_init(&oi->ip_lock); 1706 ocfs2_extent_map_init(&oi->vfs_inode); 1707 INIT_LIST_HEAD(&oi->ip_io_markers); 1708 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1709 oi->ip_dir_start_lookup = 0; 1710 init_rwsem(&oi->ip_alloc_sem); 1711 init_rwsem(&oi->ip_xattr_sem); 1712 mutex_init(&oi->ip_io_mutex); 1713 1714 oi->ip_blkno = 0ULL; 1715 oi->ip_clusters = 0; 1716 oi->ip_next_orphan = NULL; 1717 1718 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1719 1720 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1721 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1722 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1723 1724 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1725 &ocfs2_inode_caching_ops); 1726 1727 inode_init_once(&oi->vfs_inode); 1728 } 1729 1730 static int ocfs2_initialize_mem_caches(void) 1731 { 1732 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1733 sizeof(struct ocfs2_inode_info), 1734 0, 1735 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1736 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1737 ocfs2_inode_init_once); 1738 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1739 sizeof(struct ocfs2_dquot), 1740 0, 1741 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1742 SLAB_MEM_SPREAD), 1743 NULL); 1744 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1745 sizeof(struct ocfs2_quota_chunk), 1746 0, 1747 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1748 NULL); 1749 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1750 !ocfs2_qf_chunk_cachep) { 1751 kmem_cache_destroy(ocfs2_inode_cachep); 1752 kmem_cache_destroy(ocfs2_dquot_cachep); 1753 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1754 return -ENOMEM; 1755 } 1756 1757 return 0; 1758 } 1759 1760 static void ocfs2_free_mem_caches(void) 1761 { 1762 /* 1763 * Make sure all delayed rcu free inodes are flushed before we 1764 * destroy cache. 1765 */ 1766 rcu_barrier(); 1767 kmem_cache_destroy(ocfs2_inode_cachep); 1768 ocfs2_inode_cachep = NULL; 1769 1770 kmem_cache_destroy(ocfs2_dquot_cachep); 1771 ocfs2_dquot_cachep = NULL; 1772 1773 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1774 ocfs2_qf_chunk_cachep = NULL; 1775 } 1776 1777 static int ocfs2_get_sector(struct super_block *sb, 1778 struct buffer_head **bh, 1779 int block, 1780 int sect_size) 1781 { 1782 if (!sb_set_blocksize(sb, sect_size)) { 1783 mlog(ML_ERROR, "unable to set blocksize\n"); 1784 return -EIO; 1785 } 1786 1787 *bh = sb_getblk(sb, block); 1788 if (!*bh) { 1789 mlog_errno(-ENOMEM); 1790 return -ENOMEM; 1791 } 1792 lock_buffer(*bh); 1793 if (!buffer_dirty(*bh)) 1794 clear_buffer_uptodate(*bh); 1795 unlock_buffer(*bh); 1796 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1797 wait_on_buffer(*bh); 1798 if (!buffer_uptodate(*bh)) { 1799 mlog_errno(-EIO); 1800 brelse(*bh); 1801 *bh = NULL; 1802 return -EIO; 1803 } 1804 1805 return 0; 1806 } 1807 1808 static int ocfs2_mount_volume(struct super_block *sb) 1809 { 1810 int status = 0; 1811 int unlock_super = 0; 1812 struct ocfs2_super *osb = OCFS2_SB(sb); 1813 1814 if (ocfs2_is_hard_readonly(osb)) 1815 goto leave; 1816 1817 mutex_init(&osb->obs_trim_fs_mutex); 1818 1819 status = ocfs2_dlm_init(osb); 1820 if (status < 0) { 1821 mlog_errno(status); 1822 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1823 mlog(ML_ERROR, "couldn't mount because cluster name on" 1824 " disk does not match the running cluster name.\n"); 1825 goto leave; 1826 } 1827 1828 status = ocfs2_super_lock(osb, 1); 1829 if (status < 0) { 1830 mlog_errno(status); 1831 goto leave; 1832 } 1833 unlock_super = 1; 1834 1835 /* This will load up the node map and add ourselves to it. */ 1836 status = ocfs2_find_slot(osb); 1837 if (status < 0) { 1838 mlog_errno(status); 1839 goto leave; 1840 } 1841 1842 /* load all node-local system inodes */ 1843 status = ocfs2_init_local_system_inodes(osb); 1844 if (status < 0) { 1845 mlog_errno(status); 1846 goto leave; 1847 } 1848 1849 status = ocfs2_check_volume(osb); 1850 if (status < 0) { 1851 mlog_errno(status); 1852 goto leave; 1853 } 1854 1855 status = ocfs2_truncate_log_init(osb); 1856 if (status < 0) 1857 mlog_errno(status); 1858 1859 leave: 1860 if (unlock_super) 1861 ocfs2_super_unlock(osb, 1); 1862 1863 return status; 1864 } 1865 1866 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1867 { 1868 int tmp, hangup_needed = 0; 1869 struct ocfs2_super *osb = NULL; 1870 char nodestr[12]; 1871 1872 trace_ocfs2_dismount_volume(sb); 1873 1874 BUG_ON(!sb); 1875 osb = OCFS2_SB(sb); 1876 BUG_ON(!osb); 1877 1878 /* Remove file check sysfs related directores/files, 1879 * and wait for the pending file check operations */ 1880 ocfs2_filecheck_remove_sysfs(osb); 1881 1882 kset_unregister(osb->osb_dev_kset); 1883 1884 /* Orphan scan should be stopped as early as possible */ 1885 ocfs2_orphan_scan_stop(osb); 1886 1887 ocfs2_disable_quotas(osb); 1888 1889 /* All dquots should be freed by now */ 1890 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1891 /* Wait for worker to be done with the work structure in osb */ 1892 cancel_work_sync(&osb->dquot_drop_work); 1893 1894 ocfs2_shutdown_local_alloc(osb); 1895 1896 ocfs2_truncate_log_shutdown(osb); 1897 1898 /* This will disable recovery and flush any recovery work. */ 1899 ocfs2_recovery_exit(osb); 1900 1901 ocfs2_journal_shutdown(osb); 1902 1903 ocfs2_sync_blockdev(sb); 1904 1905 ocfs2_purge_refcount_trees(osb); 1906 1907 /* No cluster connection means we've failed during mount, so skip 1908 * all the steps which depended on that to complete. */ 1909 if (osb->cconn) { 1910 tmp = ocfs2_super_lock(osb, 1); 1911 if (tmp < 0) { 1912 mlog_errno(tmp); 1913 return; 1914 } 1915 } 1916 1917 if (osb->slot_num != OCFS2_INVALID_SLOT) 1918 ocfs2_put_slot(osb); 1919 1920 if (osb->cconn) 1921 ocfs2_super_unlock(osb, 1); 1922 1923 ocfs2_release_system_inodes(osb); 1924 1925 /* 1926 * If we're dismounting due to mount error, mount.ocfs2 will clean 1927 * up heartbeat. If we're a local mount, there is no heartbeat. 1928 * If we failed before we got a uuid_str yet, we can't stop 1929 * heartbeat. Otherwise, do it. 1930 */ 1931 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1932 !ocfs2_is_hard_readonly(osb)) 1933 hangup_needed = 1; 1934 1935 if (osb->cconn) 1936 ocfs2_dlm_shutdown(osb, hangup_needed); 1937 1938 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1939 debugfs_remove_recursive(osb->osb_debug_root); 1940 1941 if (hangup_needed) 1942 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1943 1944 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1945 1946 if (ocfs2_mount_local(osb)) 1947 snprintf(nodestr, sizeof(nodestr), "local"); 1948 else 1949 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1950 1951 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1952 osb->dev_str, nodestr); 1953 1954 ocfs2_delete_osb(osb); 1955 kfree(osb); 1956 sb->s_dev = 0; 1957 sb->s_fs_info = NULL; 1958 } 1959 1960 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1961 unsigned uuid_bytes) 1962 { 1963 int i, ret; 1964 char *ptr; 1965 1966 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1967 1968 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1969 if (osb->uuid_str == NULL) 1970 return -ENOMEM; 1971 1972 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1973 /* print with null */ 1974 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1975 if (ret != 2) /* drop super cleans up */ 1976 return -EINVAL; 1977 /* then only advance past the last char */ 1978 ptr += 2; 1979 } 1980 1981 return 0; 1982 } 1983 1984 /* Make sure entire volume is addressable by our journal. Requires 1985 osb_clusters_at_boot to be valid and for the journal to have been 1986 initialized by ocfs2_journal_init(). */ 1987 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 1988 { 1989 int status = 0; 1990 u64 max_block = 1991 ocfs2_clusters_to_blocks(osb->sb, 1992 osb->osb_clusters_at_boot) - 1; 1993 1994 /* 32-bit block number is always OK. */ 1995 if (max_block <= (u32)~0ULL) 1996 goto out; 1997 1998 /* Volume is "huge", so see if our journal is new enough to 1999 support it. */ 2000 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2001 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2002 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2003 JBD2_FEATURE_INCOMPAT_64BIT))) { 2004 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2005 "Enable the 'block64' journal option with tunefs.ocfs2"); 2006 status = -EFBIG; 2007 goto out; 2008 } 2009 2010 out: 2011 return status; 2012 } 2013 2014 static int ocfs2_initialize_super(struct super_block *sb, 2015 struct buffer_head *bh, 2016 int sector_size, 2017 struct ocfs2_blockcheck_stats *stats) 2018 { 2019 int status; 2020 int i, cbits, bbits; 2021 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2022 struct inode *inode = NULL; 2023 struct ocfs2_journal *journal; 2024 struct ocfs2_super *osb; 2025 u64 total_blocks; 2026 2027 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2028 if (!osb) { 2029 status = -ENOMEM; 2030 mlog_errno(status); 2031 goto bail; 2032 } 2033 2034 sb->s_fs_info = osb; 2035 sb->s_op = &ocfs2_sops; 2036 sb->s_d_op = &ocfs2_dentry_ops; 2037 sb->s_export_op = &ocfs2_export_ops; 2038 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2039 sb->dq_op = &ocfs2_quota_operations; 2040 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2041 sb->s_xattr = ocfs2_xattr_handlers; 2042 sb->s_time_gran = 1; 2043 sb->s_flags |= SB_NOATIME; 2044 /* this is needed to support O_LARGEFILE */ 2045 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2046 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2047 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2048 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid, 2049 sizeof(di->id2.i_super.s_uuid)); 2050 2051 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2052 2053 for (i = 0; i < 3; i++) 2054 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2055 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2056 2057 osb->sb = sb; 2058 osb->s_sectsize_bits = blksize_bits(sector_size); 2059 BUG_ON(!osb->s_sectsize_bits); 2060 2061 spin_lock_init(&osb->dc_task_lock); 2062 init_waitqueue_head(&osb->dc_event); 2063 osb->dc_work_sequence = 0; 2064 osb->dc_wake_sequence = 0; 2065 INIT_LIST_HEAD(&osb->blocked_lock_list); 2066 osb->blocked_lock_count = 0; 2067 spin_lock_init(&osb->osb_lock); 2068 spin_lock_init(&osb->osb_xattr_lock); 2069 ocfs2_init_steal_slots(osb); 2070 2071 mutex_init(&osb->system_file_mutex); 2072 2073 atomic_set(&osb->alloc_stats.moves, 0); 2074 atomic_set(&osb->alloc_stats.local_data, 0); 2075 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2076 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2077 atomic_set(&osb->alloc_stats.bg_extends, 0); 2078 2079 /* Copy the blockcheck stats from the superblock probe */ 2080 osb->osb_ecc_stats = *stats; 2081 2082 ocfs2_init_node_maps(osb); 2083 2084 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2085 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2086 2087 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2088 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2089 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2090 osb->max_slots); 2091 status = -EINVAL; 2092 goto bail; 2093 } 2094 2095 ocfs2_orphan_scan_init(osb); 2096 2097 status = ocfs2_recovery_init(osb); 2098 if (status) { 2099 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2100 mlog_errno(status); 2101 goto bail; 2102 } 2103 2104 init_waitqueue_head(&osb->checkpoint_event); 2105 2106 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2107 2108 osb->slot_num = OCFS2_INVALID_SLOT; 2109 2110 osb->s_xattr_inline_size = le16_to_cpu( 2111 di->id2.i_super.s_xattr_inline_size); 2112 2113 osb->local_alloc_state = OCFS2_LA_UNUSED; 2114 osb->local_alloc_bh = NULL; 2115 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2116 2117 init_waitqueue_head(&osb->osb_mount_event); 2118 2119 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2120 if (status) { 2121 mlog_errno(status); 2122 goto bail; 2123 } 2124 2125 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2126 if (!osb->vol_label) { 2127 mlog(ML_ERROR, "unable to alloc vol label\n"); 2128 status = -ENOMEM; 2129 goto bail; 2130 } 2131 2132 osb->slot_recovery_generations = 2133 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2134 GFP_KERNEL); 2135 if (!osb->slot_recovery_generations) { 2136 status = -ENOMEM; 2137 mlog_errno(status); 2138 goto bail; 2139 } 2140 2141 init_waitqueue_head(&osb->osb_wipe_event); 2142 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2143 sizeof(*osb->osb_orphan_wipes), 2144 GFP_KERNEL); 2145 if (!osb->osb_orphan_wipes) { 2146 status = -ENOMEM; 2147 mlog_errno(status); 2148 goto bail; 2149 } 2150 2151 osb->osb_rf_lock_tree = RB_ROOT; 2152 2153 osb->s_feature_compat = 2154 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2155 osb->s_feature_ro_compat = 2156 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2157 osb->s_feature_incompat = 2158 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2159 2160 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2161 mlog(ML_ERROR, "couldn't mount because of unsupported " 2162 "optional features (%x).\n", i); 2163 status = -EINVAL; 2164 goto bail; 2165 } 2166 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2167 mlog(ML_ERROR, "couldn't mount RDWR because of " 2168 "unsupported optional features (%x).\n", i); 2169 status = -EINVAL; 2170 goto bail; 2171 } 2172 2173 if (ocfs2_clusterinfo_valid(osb)) { 2174 osb->osb_stackflags = 2175 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2176 strlcpy(osb->osb_cluster_stack, 2177 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2178 OCFS2_STACK_LABEL_LEN + 1); 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 strlcpy(osb->osb_cluster_name, 2188 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2189 OCFS2_CLUSTER_NAME_LEN + 1); 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 /* FIXME 2199 * This should be done in ocfs2_journal_init(), but unknown 2200 * ordering issues will cause the filesystem to crash. 2201 * If anyone wants to figure out what part of the code 2202 * refers to osb->journal before ocfs2_journal_init() is run, 2203 * be my guest. 2204 */ 2205 /* initialize our journal structure */ 2206 2207 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2208 if (!journal) { 2209 mlog(ML_ERROR, "unable to alloc journal\n"); 2210 status = -ENOMEM; 2211 goto bail; 2212 } 2213 osb->journal = journal; 2214 journal->j_osb = osb; 2215 2216 atomic_set(&journal->j_num_trans, 0); 2217 init_rwsem(&journal->j_trans_barrier); 2218 init_waitqueue_head(&journal->j_checkpointed); 2219 spin_lock_init(&journal->j_lock); 2220 journal->j_trans_id = (unsigned long) 1; 2221 INIT_LIST_HEAD(&journal->j_la_cleanups); 2222 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2223 journal->j_state = OCFS2_JOURNAL_FREE; 2224 2225 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2226 init_llist_head(&osb->dquot_drop_list); 2227 2228 /* get some pseudo constants for clustersize bits */ 2229 osb->s_clustersize_bits = 2230 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2231 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2232 2233 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2234 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2235 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2236 osb->s_clustersize); 2237 status = -EINVAL; 2238 goto bail; 2239 } 2240 2241 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2242 le32_to_cpu(di->i_clusters)); 2243 2244 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2245 total_blocks); 2246 if (status) { 2247 mlog(ML_ERROR, "Volume too large " 2248 "to mount safely on this system"); 2249 status = -EFBIG; 2250 goto bail; 2251 } 2252 2253 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2254 sizeof(di->id2.i_super.s_uuid))) { 2255 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2256 status = -ENOMEM; 2257 goto bail; 2258 } 2259 2260 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2261 OCFS2_MAX_VOL_LABEL_LEN); 2262 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2263 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2264 osb->first_cluster_group_blkno = 2265 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2266 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2267 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2268 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2269 (unsigned long long)osb->root_blkno, 2270 (unsigned long long)osb->system_dir_blkno, 2271 osb->s_clustersize_bits); 2272 2273 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2274 if (!osb->osb_dlm_debug) { 2275 status = -ENOMEM; 2276 mlog_errno(status); 2277 goto bail; 2278 } 2279 2280 atomic_set(&osb->vol_state, VOLUME_INIT); 2281 2282 /* load root, system_dir, and all global system inodes */ 2283 status = ocfs2_init_global_system_inodes(osb); 2284 if (status < 0) { 2285 mlog_errno(status); 2286 goto bail; 2287 } 2288 2289 /* 2290 * global bitmap 2291 */ 2292 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2293 OCFS2_INVALID_SLOT); 2294 if (!inode) { 2295 status = -EINVAL; 2296 mlog_errno(status); 2297 goto bail; 2298 } 2299 2300 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2301 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2302 iput(inode); 2303 2304 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2305 osb->s_feature_incompat) * 8; 2306 2307 status = ocfs2_init_slot_info(osb); 2308 if (status < 0) { 2309 mlog_errno(status); 2310 goto bail; 2311 } 2312 cleancache_init_shared_fs(sb); 2313 2314 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2315 if (!osb->ocfs2_wq) { 2316 status = -ENOMEM; 2317 mlog_errno(status); 2318 } 2319 2320 bail: 2321 return status; 2322 } 2323 2324 /* 2325 * will return: -EAGAIN if it is ok to keep searching for superblocks 2326 * -EINVAL if there is a bad superblock 2327 * 0 on success 2328 */ 2329 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2330 struct buffer_head *bh, 2331 u32 blksz, 2332 struct ocfs2_blockcheck_stats *stats) 2333 { 2334 int status = -EAGAIN; 2335 2336 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2337 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2338 /* We have to do a raw check of the feature here */ 2339 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2340 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2341 status = ocfs2_block_check_validate(bh->b_data, 2342 bh->b_size, 2343 &di->i_check, 2344 stats); 2345 if (status) 2346 goto out; 2347 } 2348 status = -EINVAL; 2349 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2350 mlog(ML_ERROR, "found superblock with incorrect block " 2351 "size: found %u, should be %u\n", 2352 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2353 blksz); 2354 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2355 OCFS2_MAJOR_REV_LEVEL || 2356 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2357 OCFS2_MINOR_REV_LEVEL) { 2358 mlog(ML_ERROR, "found superblock with bad version: " 2359 "found %u.%u, should be %u.%u\n", 2360 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2361 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2362 OCFS2_MAJOR_REV_LEVEL, 2363 OCFS2_MINOR_REV_LEVEL); 2364 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2365 mlog(ML_ERROR, "bad block number on superblock: " 2366 "found %llu, should be %llu\n", 2367 (unsigned long long)le64_to_cpu(di->i_blkno), 2368 (unsigned long long)bh->b_blocknr); 2369 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2370 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2371 mlog(ML_ERROR, "bad cluster size found: %u\n", 2372 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2373 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2374 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2375 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2376 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2377 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2378 mlog(ML_ERROR, 2379 "Superblock slots found greater than file system " 2380 "maximum: found %u, max %u\n", 2381 le16_to_cpu(di->id2.i_super.s_max_slots), 2382 OCFS2_MAX_SLOTS); 2383 } else { 2384 /* found it! */ 2385 status = 0; 2386 } 2387 } 2388 2389 out: 2390 if (status && status != -EAGAIN) 2391 mlog_errno(status); 2392 return status; 2393 } 2394 2395 static int ocfs2_check_volume(struct ocfs2_super *osb) 2396 { 2397 int status; 2398 int dirty; 2399 int local; 2400 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2401 * recover 2402 * ourselves. */ 2403 2404 /* Init our journal object. */ 2405 status = ocfs2_journal_init(osb->journal, &dirty); 2406 if (status < 0) { 2407 mlog(ML_ERROR, "Could not initialize journal!\n"); 2408 goto finally; 2409 } 2410 2411 /* Now that journal has been initialized, check to make sure 2412 entire volume is addressable. */ 2413 status = ocfs2_journal_addressable(osb); 2414 if (status) 2415 goto finally; 2416 2417 /* If the journal was unmounted cleanly then we don't want to 2418 * recover anything. Otherwise, journal_load will do that 2419 * dirty work for us :) */ 2420 if (!dirty) { 2421 status = ocfs2_journal_wipe(osb->journal, 0); 2422 if (status < 0) { 2423 mlog_errno(status); 2424 goto finally; 2425 } 2426 } else { 2427 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2428 "unmounted cleanly, recovering it.\n", osb->dev_str); 2429 } 2430 2431 local = ocfs2_mount_local(osb); 2432 2433 /* will play back anything left in the journal. */ 2434 status = ocfs2_journal_load(osb->journal, local, dirty); 2435 if (status < 0) { 2436 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2437 goto finally; 2438 } 2439 2440 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2441 jbd2_journal_set_features(osb->journal->j_journal, 2442 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2443 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2444 else 2445 jbd2_journal_clear_features(osb->journal->j_journal, 2446 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2447 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2448 2449 if (dirty) { 2450 /* recover my local alloc if we didn't unmount cleanly. */ 2451 status = ocfs2_begin_local_alloc_recovery(osb, 2452 osb->slot_num, 2453 &local_alloc); 2454 if (status < 0) { 2455 mlog_errno(status); 2456 goto finally; 2457 } 2458 /* we complete the recovery process after we've marked 2459 * ourselves as mounted. */ 2460 } 2461 2462 status = ocfs2_load_local_alloc(osb); 2463 if (status < 0) { 2464 mlog_errno(status); 2465 goto finally; 2466 } 2467 2468 if (dirty) { 2469 /* Recovery will be completed after we've mounted the 2470 * rest of the volume. */ 2471 osb->local_alloc_copy = local_alloc; 2472 local_alloc = NULL; 2473 } 2474 2475 /* go through each journal, trylock it and if you get the 2476 * lock, and it's marked as dirty, set the bit in the recover 2477 * map and launch a recovery thread for it. */ 2478 status = ocfs2_mark_dead_nodes(osb); 2479 if (status < 0) { 2480 mlog_errno(status); 2481 goto finally; 2482 } 2483 2484 status = ocfs2_compute_replay_slots(osb); 2485 if (status < 0) 2486 mlog_errno(status); 2487 2488 finally: 2489 kfree(local_alloc); 2490 2491 if (status) 2492 mlog_errno(status); 2493 return status; 2494 } 2495 2496 /* 2497 * The routine gets called from dismount or close whenever a dismount on 2498 * volume is requested and the osb open count becomes 1. 2499 * It will remove the osb from the global list and also free up all the 2500 * initialized resources and fileobject. 2501 */ 2502 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2503 { 2504 /* This function assumes that the caller has the main osb resource */ 2505 2506 /* ocfs2_initializer_super have already created this workqueue */ 2507 if (osb->ocfs2_wq) 2508 destroy_workqueue(osb->ocfs2_wq); 2509 2510 ocfs2_free_slot_info(osb); 2511 2512 kfree(osb->osb_orphan_wipes); 2513 kfree(osb->slot_recovery_generations); 2514 /* FIXME 2515 * This belongs in journal shutdown, but because we have to 2516 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2517 * we free it here. 2518 */ 2519 kfree(osb->journal); 2520 kfree(osb->local_alloc_copy); 2521 kfree(osb->uuid_str); 2522 kfree(osb->vol_label); 2523 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2524 memset(osb, 0, sizeof(struct ocfs2_super)); 2525 } 2526 2527 /* Depending on the mount option passed, perform one of the following: 2528 * Put OCFS2 into a readonly state (default) 2529 * Return EIO so that only the process errs 2530 * Fix the error as if fsck.ocfs2 -y 2531 * panic 2532 */ 2533 static int ocfs2_handle_error(struct super_block *sb) 2534 { 2535 struct ocfs2_super *osb = OCFS2_SB(sb); 2536 int rv = 0; 2537 2538 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2539 pr_crit("On-disk corruption discovered. " 2540 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2541 2542 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2543 panic("OCFS2: (device %s): panic forced after error\n", 2544 sb->s_id); 2545 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2546 pr_crit("OCFS2: Returning error to the calling process.\n"); 2547 rv = -EIO; 2548 } else { /* default option */ 2549 rv = -EROFS; 2550 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb))) 2551 return rv; 2552 2553 pr_crit("OCFS2: File system is now read-only.\n"); 2554 sb->s_flags |= SB_RDONLY; 2555 ocfs2_set_ro_flag(osb, 0); 2556 } 2557 2558 return rv; 2559 } 2560 2561 int __ocfs2_error(struct super_block *sb, const char *function, 2562 const char *fmt, ...) 2563 { 2564 struct va_format vaf; 2565 va_list args; 2566 2567 va_start(args, fmt); 2568 vaf.fmt = fmt; 2569 vaf.va = &args; 2570 2571 /* Not using mlog here because we want to show the actual 2572 * function the error came from. */ 2573 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2574 sb->s_id, function, &vaf); 2575 2576 va_end(args); 2577 2578 return ocfs2_handle_error(sb); 2579 } 2580 2581 /* Handle critical errors. This is intentionally more drastic than 2582 * ocfs2_handle_error, so we only use for things like journal errors, 2583 * etc. */ 2584 void __ocfs2_abort(struct super_block *sb, const char *function, 2585 const char *fmt, ...) 2586 { 2587 struct va_format vaf; 2588 va_list args; 2589 2590 va_start(args, fmt); 2591 2592 vaf.fmt = fmt; 2593 vaf.va = &args; 2594 2595 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2596 sb->s_id, function, &vaf); 2597 2598 va_end(args); 2599 2600 /* We don't have the cluster support yet to go straight to 2601 * hard readonly in here. Until then, we want to keep 2602 * ocfs2_abort() so that we can at least mark critical 2603 * errors. 2604 * 2605 * TODO: This should abort the journal and alert other nodes 2606 * that our slot needs recovery. */ 2607 2608 /* Force a panic(). This stinks, but it's better than letting 2609 * things continue without having a proper hard readonly 2610 * here. */ 2611 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2612 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2613 ocfs2_handle_error(sb); 2614 } 2615 2616 /* 2617 * Void signal blockers, because in-kernel sigprocmask() only fails 2618 * when SIG_* is wrong. 2619 */ 2620 void ocfs2_block_signals(sigset_t *oldset) 2621 { 2622 int rc; 2623 sigset_t blocked; 2624 2625 sigfillset(&blocked); 2626 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2627 BUG_ON(rc); 2628 } 2629 2630 void ocfs2_unblock_signals(sigset_t *oldset) 2631 { 2632 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2633 BUG_ON(rc); 2634 } 2635 2636 module_init(ocfs2_init); 2637 module_exit(ocfs2_exit); 2638