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 iput(inode); 977 } 978 } 979 980 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 981 { 982 struct dentry *root; 983 int status, sector_size; 984 struct mount_options parsed_options; 985 struct inode *inode = NULL; 986 struct ocfs2_super *osb = NULL; 987 struct buffer_head *bh = NULL; 988 char nodestr[12]; 989 struct ocfs2_blockcheck_stats stats; 990 991 trace_ocfs2_fill_super(sb, data, silent); 992 993 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 994 status = -EINVAL; 995 goto read_super_error; 996 } 997 998 /* probe for superblock */ 999 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1000 if (status < 0) { 1001 mlog(ML_ERROR, "superblock probe failed!\n"); 1002 goto read_super_error; 1003 } 1004 1005 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1006 osb = OCFS2_SB(sb); 1007 if (status < 0) { 1008 mlog_errno(status); 1009 goto read_super_error; 1010 } 1011 brelse(bh); 1012 bh = NULL; 1013 1014 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1015 status = -EINVAL; 1016 goto read_super_error; 1017 } 1018 osb->s_mount_opt = parsed_options.mount_opt; 1019 osb->s_atime_quantum = parsed_options.atime_quantum; 1020 osb->preferred_slot = parsed_options.slot; 1021 osb->osb_commit_interval = parsed_options.commit_interval; 1022 1023 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1024 osb->osb_resv_level = parsed_options.resv_level; 1025 osb->osb_dir_resv_level = parsed_options.resv_level; 1026 if (parsed_options.dir_resv_level == -1) 1027 osb->osb_dir_resv_level = parsed_options.resv_level; 1028 else 1029 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1030 1031 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1032 if (status) 1033 goto read_super_error; 1034 1035 sb->s_magic = OCFS2_SUPER_MAGIC; 1036 1037 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) | 1038 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0); 1039 1040 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY, 1041 * heartbeat=none */ 1042 if (bdev_read_only(sb->s_bdev)) { 1043 if (!sb_rdonly(sb)) { 1044 status = -EACCES; 1045 mlog(ML_ERROR, "Readonly device detected but readonly " 1046 "mount was not specified.\n"); 1047 goto read_super_error; 1048 } 1049 1050 /* You should not be able to start a local heartbeat 1051 * on a readonly device. */ 1052 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1053 status = -EROFS; 1054 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1055 "device.\n"); 1056 goto read_super_error; 1057 } 1058 1059 status = ocfs2_check_journals_nolocks(osb); 1060 if (status < 0) { 1061 if (status == -EROFS) 1062 mlog(ML_ERROR, "Recovery required on readonly " 1063 "file system, but write access is " 1064 "unavailable.\n"); 1065 else 1066 mlog_errno(status); 1067 goto read_super_error; 1068 } 1069 1070 ocfs2_set_ro_flag(osb, 1); 1071 1072 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1073 "Cluster services will not be used for this mount. " 1074 "Recovery will be skipped.\n", osb->dev_str); 1075 } 1076 1077 if (!ocfs2_is_hard_readonly(osb)) { 1078 if (sb_rdonly(sb)) 1079 ocfs2_set_ro_flag(osb, 0); 1080 } 1081 1082 status = ocfs2_verify_heartbeat(osb); 1083 if (status < 0) { 1084 mlog_errno(status); 1085 goto read_super_error; 1086 } 1087 1088 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1089 ocfs2_debugfs_root); 1090 1091 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root, 1092 osb, &ocfs2_osb_debug_fops); 1093 1094 if (ocfs2_meta_ecc(osb)) 1095 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats, 1096 osb->osb_debug_root); 1097 1098 status = ocfs2_mount_volume(sb); 1099 if (status < 0) 1100 goto read_super_error; 1101 1102 if (osb->root_inode) 1103 inode = igrab(osb->root_inode); 1104 1105 if (!inode) { 1106 status = -EIO; 1107 mlog_errno(status); 1108 goto read_super_error; 1109 } 1110 1111 root = d_make_root(inode); 1112 if (!root) { 1113 status = -ENOMEM; 1114 mlog_errno(status); 1115 goto read_super_error; 1116 } 1117 1118 sb->s_root = root; 1119 1120 ocfs2_complete_mount_recovery(osb); 1121 1122 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL, 1123 &ocfs2_kset->kobj); 1124 if (!osb->osb_dev_kset) { 1125 status = -ENOMEM; 1126 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id); 1127 goto read_super_error; 1128 } 1129 1130 /* Create filecheck sysfs related directories/files at 1131 * /sys/fs/ocfs2/<devname>/filecheck */ 1132 if (ocfs2_filecheck_create_sysfs(osb)) { 1133 status = -ENOMEM; 1134 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at " 1135 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id); 1136 goto read_super_error; 1137 } 1138 1139 if (ocfs2_mount_local(osb)) 1140 snprintf(nodestr, sizeof(nodestr), "local"); 1141 else 1142 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1143 1144 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1145 "with %s data mode.\n", 1146 osb->dev_str, nodestr, osb->slot_num, 1147 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1148 "ordered"); 1149 1150 if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) && 1151 !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT)) 1152 printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted " 1153 "without cluster aware mode.\n", osb->dev_str); 1154 1155 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1156 wake_up(&osb->osb_mount_event); 1157 1158 /* Now we can initialize quotas because we can afford to wait 1159 * for cluster locks recovery now. That also means that truncation 1160 * log recovery can happen but that waits for proper quota setup */ 1161 if (!sb_rdonly(sb)) { 1162 status = ocfs2_enable_quotas(osb); 1163 if (status < 0) { 1164 /* We have to err-out specially here because 1165 * s_root is already set */ 1166 mlog_errno(status); 1167 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1168 wake_up(&osb->osb_mount_event); 1169 return status; 1170 } 1171 } 1172 1173 ocfs2_complete_quota_recovery(osb); 1174 1175 /* Now we wake up again for processes waiting for quotas */ 1176 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1177 wake_up(&osb->osb_mount_event); 1178 1179 /* Start this when the mount is almost sure of being successful */ 1180 ocfs2_orphan_scan_start(osb); 1181 1182 return status; 1183 1184 read_super_error: 1185 brelse(bh); 1186 1187 if (status) 1188 mlog_errno(status); 1189 1190 if (osb) { 1191 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1192 wake_up(&osb->osb_mount_event); 1193 ocfs2_dismount_volume(sb, 1); 1194 } 1195 1196 return status; 1197 } 1198 1199 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1200 int flags, 1201 const char *dev_name, 1202 void *data) 1203 { 1204 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1205 } 1206 1207 static struct file_system_type ocfs2_fs_type = { 1208 .owner = THIS_MODULE, 1209 .name = "ocfs2", 1210 .mount = ocfs2_mount, 1211 .kill_sb = kill_block_super, 1212 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1213 .next = NULL 1214 }; 1215 MODULE_ALIAS_FS("ocfs2"); 1216 1217 static int ocfs2_check_set_options(struct super_block *sb, 1218 struct mount_options *options) 1219 { 1220 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1221 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1222 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1223 mlog(ML_ERROR, "User quotas were requested, but this " 1224 "filesystem does not have the feature enabled.\n"); 1225 return 0; 1226 } 1227 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1228 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1229 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1230 mlog(ML_ERROR, "Group quotas were requested, but this " 1231 "filesystem does not have the feature enabled.\n"); 1232 return 0; 1233 } 1234 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1235 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1236 mlog(ML_ERROR, "ACL support requested but extended attributes " 1237 "feature is not enabled\n"); 1238 return 0; 1239 } 1240 /* No ACL setting specified? Use XATTR feature... */ 1241 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1242 OCFS2_MOUNT_NO_POSIX_ACL))) { 1243 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1244 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1245 else 1246 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1247 } 1248 return 1; 1249 } 1250 1251 static int ocfs2_parse_options(struct super_block *sb, 1252 char *options, 1253 struct mount_options *mopt, 1254 int is_remount) 1255 { 1256 int status, user_stack = 0; 1257 char *p; 1258 u32 tmp; 1259 int token, option; 1260 substring_t args[MAX_OPT_ARGS]; 1261 1262 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1263 1264 mopt->commit_interval = 0; 1265 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1266 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1267 mopt->slot = OCFS2_INVALID_SLOT; 1268 mopt->localalloc_opt = -1; 1269 mopt->cluster_stack[0] = '\0'; 1270 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1271 mopt->dir_resv_level = -1; 1272 1273 if (!options) { 1274 status = 1; 1275 goto bail; 1276 } 1277 1278 while ((p = strsep(&options, ",")) != NULL) { 1279 if (!*p) 1280 continue; 1281 1282 token = match_token(p, tokens, args); 1283 switch (token) { 1284 case Opt_hb_local: 1285 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1286 break; 1287 case Opt_hb_none: 1288 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1289 break; 1290 case Opt_hb_global: 1291 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1292 break; 1293 case Opt_barrier: 1294 if (match_int(&args[0], &option)) { 1295 status = 0; 1296 goto bail; 1297 } 1298 if (option) 1299 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1300 else 1301 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1302 break; 1303 case Opt_intr: 1304 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1305 break; 1306 case Opt_nointr: 1307 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1308 break; 1309 case Opt_err_panic: 1310 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1311 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1312 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1313 break; 1314 case Opt_err_ro: 1315 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1316 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1317 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1318 break; 1319 case Opt_err_cont: 1320 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1321 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1322 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1323 break; 1324 case Opt_data_ordered: 1325 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1326 break; 1327 case Opt_data_writeback: 1328 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1329 break; 1330 case Opt_user_xattr: 1331 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1332 break; 1333 case Opt_nouser_xattr: 1334 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1335 break; 1336 case Opt_atime_quantum: 1337 if (match_int(&args[0], &option)) { 1338 status = 0; 1339 goto bail; 1340 } 1341 if (option >= 0) 1342 mopt->atime_quantum = option; 1343 break; 1344 case Opt_slot: 1345 if (match_int(&args[0], &option)) { 1346 status = 0; 1347 goto bail; 1348 } 1349 if (option) 1350 mopt->slot = (u16)option; 1351 break; 1352 case Opt_commit: 1353 if (match_int(&args[0], &option)) { 1354 status = 0; 1355 goto bail; 1356 } 1357 if (option < 0) 1358 return 0; 1359 if (option == 0) 1360 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1361 mopt->commit_interval = HZ * option; 1362 break; 1363 case Opt_localalloc: 1364 if (match_int(&args[0], &option)) { 1365 status = 0; 1366 goto bail; 1367 } 1368 if (option >= 0) 1369 mopt->localalloc_opt = option; 1370 break; 1371 case Opt_localflocks: 1372 /* 1373 * Changing this during remount could race 1374 * flock() requests, or "unbalance" existing 1375 * ones (e.g., a lock is taken in one mode but 1376 * dropped in the other). If users care enough 1377 * to flip locking modes during remount, we 1378 * could add a "local" flag to individual 1379 * flock structures for proper tracking of 1380 * state. 1381 */ 1382 if (!is_remount) 1383 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1384 break; 1385 case Opt_stack: 1386 /* Check both that the option we were passed 1387 * is of the right length and that it is a proper 1388 * string of the right length. 1389 */ 1390 if (((args[0].to - args[0].from) != 1391 OCFS2_STACK_LABEL_LEN) || 1392 (strnlen(args[0].from, 1393 OCFS2_STACK_LABEL_LEN) != 1394 OCFS2_STACK_LABEL_LEN)) { 1395 mlog(ML_ERROR, 1396 "Invalid cluster_stack option\n"); 1397 status = 0; 1398 goto bail; 1399 } 1400 memcpy(mopt->cluster_stack, args[0].from, 1401 OCFS2_STACK_LABEL_LEN); 1402 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1403 /* 1404 * Open code the memcmp here as we don't have 1405 * an osb to pass to 1406 * ocfs2_userspace_stack(). 1407 */ 1408 if (memcmp(mopt->cluster_stack, 1409 OCFS2_CLASSIC_CLUSTER_STACK, 1410 OCFS2_STACK_LABEL_LEN)) 1411 user_stack = 1; 1412 break; 1413 case Opt_inode64: 1414 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1415 break; 1416 case Opt_usrquota: 1417 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1418 break; 1419 case Opt_grpquota: 1420 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1421 break; 1422 case Opt_coherency_buffered: 1423 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1424 break; 1425 case Opt_coherency_full: 1426 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1427 break; 1428 case Opt_acl: 1429 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1430 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1431 break; 1432 case Opt_noacl: 1433 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1434 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1435 break; 1436 case Opt_resv_level: 1437 if (is_remount) 1438 break; 1439 if (match_int(&args[0], &option)) { 1440 status = 0; 1441 goto bail; 1442 } 1443 if (option >= OCFS2_MIN_RESV_LEVEL && 1444 option < OCFS2_MAX_RESV_LEVEL) 1445 mopt->resv_level = option; 1446 break; 1447 case Opt_dir_resv_level: 1448 if (is_remount) 1449 break; 1450 if (match_int(&args[0], &option)) { 1451 status = 0; 1452 goto bail; 1453 } 1454 if (option >= OCFS2_MIN_RESV_LEVEL && 1455 option < OCFS2_MAX_RESV_LEVEL) 1456 mopt->dir_resv_level = option; 1457 break; 1458 case Opt_journal_async_commit: 1459 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1460 break; 1461 case Opt_nocluster: 1462 mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER; 1463 break; 1464 default: 1465 mlog(ML_ERROR, 1466 "Unrecognized mount option \"%s\" " 1467 "or missing value\n", p); 1468 status = 0; 1469 goto bail; 1470 } 1471 } 1472 1473 if (user_stack == 0) { 1474 /* Ensure only one heartbeat mode */ 1475 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1476 OCFS2_MOUNT_HB_GLOBAL | 1477 OCFS2_MOUNT_HB_NONE); 1478 if (hweight32(tmp) != 1) { 1479 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1480 status = 0; 1481 goto bail; 1482 } 1483 } 1484 1485 status = 1; 1486 1487 bail: 1488 return status; 1489 } 1490 1491 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1492 { 1493 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1494 unsigned long opts = osb->s_mount_opt; 1495 unsigned int local_alloc_megs; 1496 1497 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1498 seq_printf(s, ",_netdev"); 1499 if (opts & OCFS2_MOUNT_HB_LOCAL) 1500 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1501 else 1502 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1503 } else 1504 seq_printf(s, ",%s", OCFS2_HB_NONE); 1505 1506 if (opts & OCFS2_MOUNT_NOINTR) 1507 seq_printf(s, ",nointr"); 1508 1509 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1510 seq_printf(s, ",data=writeback"); 1511 else 1512 seq_printf(s, ",data=ordered"); 1513 1514 if (opts & OCFS2_MOUNT_BARRIER) 1515 seq_printf(s, ",barrier=1"); 1516 1517 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1518 seq_printf(s, ",errors=panic"); 1519 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1520 seq_printf(s, ",errors=continue"); 1521 else 1522 seq_printf(s, ",errors=remount-ro"); 1523 1524 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1525 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1526 1527 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1528 1529 if (osb->osb_commit_interval) 1530 seq_printf(s, ",commit=%u", 1531 (unsigned) (osb->osb_commit_interval / HZ)); 1532 1533 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1534 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1535 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1536 1537 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1538 seq_printf(s, ",localflocks,"); 1539 1540 if (osb->osb_cluster_stack[0]) 1541 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1542 OCFS2_STACK_LABEL_LEN); 1543 if (opts & OCFS2_MOUNT_USRQUOTA) 1544 seq_printf(s, ",usrquota"); 1545 if (opts & OCFS2_MOUNT_GRPQUOTA) 1546 seq_printf(s, ",grpquota"); 1547 1548 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1549 seq_printf(s, ",coherency=buffered"); 1550 else 1551 seq_printf(s, ",coherency=full"); 1552 1553 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1554 seq_printf(s, ",nouser_xattr"); 1555 else 1556 seq_printf(s, ",user_xattr"); 1557 1558 if (opts & OCFS2_MOUNT_INODE64) 1559 seq_printf(s, ",inode64"); 1560 1561 if (opts & OCFS2_MOUNT_POSIX_ACL) 1562 seq_printf(s, ",acl"); 1563 else 1564 seq_printf(s, ",noacl"); 1565 1566 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1567 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1568 1569 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1570 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1571 1572 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1573 seq_printf(s, ",journal_async_commit"); 1574 1575 if (opts & OCFS2_MOUNT_NOCLUSTER) 1576 seq_printf(s, ",nocluster"); 1577 1578 return 0; 1579 } 1580 1581 static int __init ocfs2_init(void) 1582 { 1583 int status; 1584 1585 status = init_ocfs2_uptodate_cache(); 1586 if (status < 0) 1587 goto out1; 1588 1589 status = ocfs2_initialize_mem_caches(); 1590 if (status < 0) 1591 goto out2; 1592 1593 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1594 1595 ocfs2_set_locking_protocol(); 1596 1597 status = register_quota_format(&ocfs2_quota_format); 1598 if (status < 0) 1599 goto out3; 1600 status = register_filesystem(&ocfs2_fs_type); 1601 if (!status) 1602 return 0; 1603 1604 unregister_quota_format(&ocfs2_quota_format); 1605 out3: 1606 debugfs_remove(ocfs2_debugfs_root); 1607 ocfs2_free_mem_caches(); 1608 out2: 1609 exit_ocfs2_uptodate_cache(); 1610 out1: 1611 mlog_errno(status); 1612 return status; 1613 } 1614 1615 static void __exit ocfs2_exit(void) 1616 { 1617 unregister_quota_format(&ocfs2_quota_format); 1618 1619 debugfs_remove(ocfs2_debugfs_root); 1620 1621 ocfs2_free_mem_caches(); 1622 1623 unregister_filesystem(&ocfs2_fs_type); 1624 1625 exit_ocfs2_uptodate_cache(); 1626 } 1627 1628 static void ocfs2_put_super(struct super_block *sb) 1629 { 1630 trace_ocfs2_put_super(sb); 1631 1632 ocfs2_sync_blockdev(sb); 1633 ocfs2_dismount_volume(sb, 0); 1634 } 1635 1636 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1637 { 1638 struct ocfs2_super *osb; 1639 u32 numbits, freebits; 1640 int status; 1641 struct ocfs2_dinode *bm_lock; 1642 struct buffer_head *bh = NULL; 1643 struct inode *inode = NULL; 1644 1645 trace_ocfs2_statfs(dentry->d_sb, buf); 1646 1647 osb = OCFS2_SB(dentry->d_sb); 1648 1649 inode = ocfs2_get_system_file_inode(osb, 1650 GLOBAL_BITMAP_SYSTEM_INODE, 1651 OCFS2_INVALID_SLOT); 1652 if (!inode) { 1653 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1654 status = -EIO; 1655 goto bail; 1656 } 1657 1658 status = ocfs2_inode_lock(inode, &bh, 0); 1659 if (status < 0) { 1660 mlog_errno(status); 1661 goto bail; 1662 } 1663 1664 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1665 1666 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1667 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1668 1669 buf->f_type = OCFS2_SUPER_MAGIC; 1670 buf->f_bsize = dentry->d_sb->s_blocksize; 1671 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1672 buf->f_blocks = ((sector_t) numbits) * 1673 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1674 buf->f_bfree = ((sector_t) freebits) * 1675 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1676 buf->f_bavail = buf->f_bfree; 1677 buf->f_files = numbits; 1678 buf->f_ffree = freebits; 1679 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1680 & 0xFFFFFFFFUL; 1681 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1682 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1683 1684 brelse(bh); 1685 1686 ocfs2_inode_unlock(inode, 0); 1687 status = 0; 1688 bail: 1689 iput(inode); 1690 1691 if (status) 1692 mlog_errno(status); 1693 1694 return status; 1695 } 1696 1697 static void ocfs2_inode_init_once(void *data) 1698 { 1699 struct ocfs2_inode_info *oi = data; 1700 1701 oi->ip_flags = 0; 1702 oi->ip_open_count = 0; 1703 spin_lock_init(&oi->ip_lock); 1704 ocfs2_extent_map_init(&oi->vfs_inode); 1705 INIT_LIST_HEAD(&oi->ip_io_markers); 1706 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1707 oi->ip_dir_start_lookup = 0; 1708 init_rwsem(&oi->ip_alloc_sem); 1709 init_rwsem(&oi->ip_xattr_sem); 1710 mutex_init(&oi->ip_io_mutex); 1711 1712 oi->ip_blkno = 0ULL; 1713 oi->ip_clusters = 0; 1714 oi->ip_next_orphan = NULL; 1715 1716 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1717 1718 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1719 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1720 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1721 1722 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1723 &ocfs2_inode_caching_ops); 1724 1725 inode_init_once(&oi->vfs_inode); 1726 } 1727 1728 static int ocfs2_initialize_mem_caches(void) 1729 { 1730 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1731 sizeof(struct ocfs2_inode_info), 1732 0, 1733 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1734 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1735 ocfs2_inode_init_once); 1736 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1737 sizeof(struct ocfs2_dquot), 1738 0, 1739 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1740 SLAB_MEM_SPREAD), 1741 NULL); 1742 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1743 sizeof(struct ocfs2_quota_chunk), 1744 0, 1745 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1746 NULL); 1747 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1748 !ocfs2_qf_chunk_cachep) { 1749 kmem_cache_destroy(ocfs2_inode_cachep); 1750 kmem_cache_destroy(ocfs2_dquot_cachep); 1751 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1752 return -ENOMEM; 1753 } 1754 1755 return 0; 1756 } 1757 1758 static void ocfs2_free_mem_caches(void) 1759 { 1760 /* 1761 * Make sure all delayed rcu free inodes are flushed before we 1762 * destroy cache. 1763 */ 1764 rcu_barrier(); 1765 kmem_cache_destroy(ocfs2_inode_cachep); 1766 ocfs2_inode_cachep = NULL; 1767 1768 kmem_cache_destroy(ocfs2_dquot_cachep); 1769 ocfs2_dquot_cachep = NULL; 1770 1771 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1772 ocfs2_qf_chunk_cachep = NULL; 1773 } 1774 1775 static int ocfs2_get_sector(struct super_block *sb, 1776 struct buffer_head **bh, 1777 int block, 1778 int sect_size) 1779 { 1780 if (!sb_set_blocksize(sb, sect_size)) { 1781 mlog(ML_ERROR, "unable to set blocksize\n"); 1782 return -EIO; 1783 } 1784 1785 *bh = sb_getblk(sb, block); 1786 if (!*bh) { 1787 mlog_errno(-ENOMEM); 1788 return -ENOMEM; 1789 } 1790 lock_buffer(*bh); 1791 if (!buffer_dirty(*bh)) 1792 clear_buffer_uptodate(*bh); 1793 unlock_buffer(*bh); 1794 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1795 wait_on_buffer(*bh); 1796 if (!buffer_uptodate(*bh)) { 1797 mlog_errno(-EIO); 1798 brelse(*bh); 1799 *bh = NULL; 1800 return -EIO; 1801 } 1802 1803 return 0; 1804 } 1805 1806 static int ocfs2_mount_volume(struct super_block *sb) 1807 { 1808 int status = 0; 1809 int unlock_super = 0; 1810 struct ocfs2_super *osb = OCFS2_SB(sb); 1811 1812 if (ocfs2_is_hard_readonly(osb)) 1813 goto leave; 1814 1815 mutex_init(&osb->obs_trim_fs_mutex); 1816 1817 status = ocfs2_dlm_init(osb); 1818 if (status < 0) { 1819 mlog_errno(status); 1820 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1821 mlog(ML_ERROR, "couldn't mount because cluster name on" 1822 " disk does not match the running cluster name.\n"); 1823 goto leave; 1824 } 1825 1826 status = ocfs2_super_lock(osb, 1); 1827 if (status < 0) { 1828 mlog_errno(status); 1829 goto leave; 1830 } 1831 unlock_super = 1; 1832 1833 /* This will load up the node map and add ourselves to it. */ 1834 status = ocfs2_find_slot(osb); 1835 if (status < 0) { 1836 mlog_errno(status); 1837 goto leave; 1838 } 1839 1840 /* load all node-local system inodes */ 1841 status = ocfs2_init_local_system_inodes(osb); 1842 if (status < 0) { 1843 mlog_errno(status); 1844 goto leave; 1845 } 1846 1847 status = ocfs2_check_volume(osb); 1848 if (status < 0) { 1849 mlog_errno(status); 1850 goto leave; 1851 } 1852 1853 status = ocfs2_truncate_log_init(osb); 1854 if (status < 0) 1855 mlog_errno(status); 1856 1857 leave: 1858 if (unlock_super) 1859 ocfs2_super_unlock(osb, 1); 1860 1861 return status; 1862 } 1863 1864 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1865 { 1866 int tmp, hangup_needed = 0; 1867 struct ocfs2_super *osb = NULL; 1868 char nodestr[12]; 1869 1870 trace_ocfs2_dismount_volume(sb); 1871 1872 BUG_ON(!sb); 1873 osb = OCFS2_SB(sb); 1874 BUG_ON(!osb); 1875 1876 /* Remove file check sysfs related directores/files, 1877 * and wait for the pending file check operations */ 1878 ocfs2_filecheck_remove_sysfs(osb); 1879 1880 kset_unregister(osb->osb_dev_kset); 1881 1882 /* Orphan scan should be stopped as early as possible */ 1883 ocfs2_orphan_scan_stop(osb); 1884 1885 ocfs2_disable_quotas(osb); 1886 1887 /* All dquots should be freed by now */ 1888 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1889 /* Wait for worker to be done with the work structure in osb */ 1890 cancel_work_sync(&osb->dquot_drop_work); 1891 1892 ocfs2_shutdown_local_alloc(osb); 1893 1894 ocfs2_truncate_log_shutdown(osb); 1895 1896 /* This will disable recovery and flush any recovery work. */ 1897 ocfs2_recovery_exit(osb); 1898 1899 ocfs2_journal_shutdown(osb); 1900 1901 ocfs2_sync_blockdev(sb); 1902 1903 ocfs2_purge_refcount_trees(osb); 1904 1905 /* No cluster connection means we've failed during mount, so skip 1906 * all the steps which depended on that to complete. */ 1907 if (osb->cconn) { 1908 tmp = ocfs2_super_lock(osb, 1); 1909 if (tmp < 0) { 1910 mlog_errno(tmp); 1911 return; 1912 } 1913 } 1914 1915 if (osb->slot_num != OCFS2_INVALID_SLOT) 1916 ocfs2_put_slot(osb); 1917 1918 if (osb->cconn) 1919 ocfs2_super_unlock(osb, 1); 1920 1921 ocfs2_release_system_inodes(osb); 1922 1923 /* 1924 * If we're dismounting due to mount error, mount.ocfs2 will clean 1925 * up heartbeat. If we're a local mount, there is no heartbeat. 1926 * If we failed before we got a uuid_str yet, we can't stop 1927 * heartbeat. Otherwise, do it. 1928 */ 1929 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1930 !ocfs2_is_hard_readonly(osb)) 1931 hangup_needed = 1; 1932 1933 if (osb->cconn) 1934 ocfs2_dlm_shutdown(osb, hangup_needed); 1935 1936 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1937 debugfs_remove_recursive(osb->osb_debug_root); 1938 1939 if (hangup_needed) 1940 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1941 1942 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1943 1944 if (ocfs2_mount_local(osb)) 1945 snprintf(nodestr, sizeof(nodestr), "local"); 1946 else 1947 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1948 1949 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1950 osb->dev_str, nodestr); 1951 1952 ocfs2_delete_osb(osb); 1953 kfree(osb); 1954 sb->s_dev = 0; 1955 sb->s_fs_info = NULL; 1956 } 1957 1958 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1959 unsigned uuid_bytes) 1960 { 1961 int i, ret; 1962 char *ptr; 1963 1964 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1965 1966 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1967 if (osb->uuid_str == NULL) 1968 return -ENOMEM; 1969 1970 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1971 /* print with null */ 1972 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1973 if (ret != 2) /* drop super cleans up */ 1974 return -EINVAL; 1975 /* then only advance past the last char */ 1976 ptr += 2; 1977 } 1978 1979 return 0; 1980 } 1981 1982 /* Make sure entire volume is addressable by our journal. Requires 1983 osb_clusters_at_boot to be valid and for the journal to have been 1984 initialized by ocfs2_journal_init(). */ 1985 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 1986 { 1987 int status = 0; 1988 u64 max_block = 1989 ocfs2_clusters_to_blocks(osb->sb, 1990 osb->osb_clusters_at_boot) - 1; 1991 1992 /* 32-bit block number is always OK. */ 1993 if (max_block <= (u32)~0ULL) 1994 goto out; 1995 1996 /* Volume is "huge", so see if our journal is new enough to 1997 support it. */ 1998 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 1999 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2000 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2001 JBD2_FEATURE_INCOMPAT_64BIT))) { 2002 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2003 "Enable the 'block64' journal option with tunefs.ocfs2"); 2004 status = -EFBIG; 2005 goto out; 2006 } 2007 2008 out: 2009 return status; 2010 } 2011 2012 static int ocfs2_initialize_super(struct super_block *sb, 2013 struct buffer_head *bh, 2014 int sector_size, 2015 struct ocfs2_blockcheck_stats *stats) 2016 { 2017 int status; 2018 int i, cbits, bbits; 2019 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2020 struct inode *inode = NULL; 2021 struct ocfs2_journal *journal; 2022 struct ocfs2_super *osb; 2023 u64 total_blocks; 2024 2025 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2026 if (!osb) { 2027 status = -ENOMEM; 2028 mlog_errno(status); 2029 goto bail; 2030 } 2031 2032 sb->s_fs_info = osb; 2033 sb->s_op = &ocfs2_sops; 2034 sb->s_d_op = &ocfs2_dentry_ops; 2035 sb->s_export_op = &ocfs2_export_ops; 2036 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2037 sb->dq_op = &ocfs2_quota_operations; 2038 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2039 sb->s_xattr = ocfs2_xattr_handlers; 2040 sb->s_time_gran = 1; 2041 sb->s_flags |= SB_NOATIME; 2042 /* this is needed to support O_LARGEFILE */ 2043 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2044 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2045 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2046 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid, 2047 sizeof(di->id2.i_super.s_uuid)); 2048 2049 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2050 2051 for (i = 0; i < 3; i++) 2052 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2053 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2054 2055 osb->sb = sb; 2056 osb->s_sectsize_bits = blksize_bits(sector_size); 2057 BUG_ON(!osb->s_sectsize_bits); 2058 2059 spin_lock_init(&osb->dc_task_lock); 2060 init_waitqueue_head(&osb->dc_event); 2061 osb->dc_work_sequence = 0; 2062 osb->dc_wake_sequence = 0; 2063 INIT_LIST_HEAD(&osb->blocked_lock_list); 2064 osb->blocked_lock_count = 0; 2065 spin_lock_init(&osb->osb_lock); 2066 spin_lock_init(&osb->osb_xattr_lock); 2067 ocfs2_init_steal_slots(osb); 2068 2069 mutex_init(&osb->system_file_mutex); 2070 2071 atomic_set(&osb->alloc_stats.moves, 0); 2072 atomic_set(&osb->alloc_stats.local_data, 0); 2073 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2074 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2075 atomic_set(&osb->alloc_stats.bg_extends, 0); 2076 2077 /* Copy the blockcheck stats from the superblock probe */ 2078 osb->osb_ecc_stats = *stats; 2079 2080 ocfs2_init_node_maps(osb); 2081 2082 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2083 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2084 2085 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2086 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2087 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2088 osb->max_slots); 2089 status = -EINVAL; 2090 goto bail; 2091 } 2092 2093 ocfs2_orphan_scan_init(osb); 2094 2095 status = ocfs2_recovery_init(osb); 2096 if (status) { 2097 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2098 mlog_errno(status); 2099 goto bail; 2100 } 2101 2102 init_waitqueue_head(&osb->checkpoint_event); 2103 2104 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2105 2106 osb->slot_num = OCFS2_INVALID_SLOT; 2107 2108 osb->s_xattr_inline_size = le16_to_cpu( 2109 di->id2.i_super.s_xattr_inline_size); 2110 2111 osb->local_alloc_state = OCFS2_LA_UNUSED; 2112 osb->local_alloc_bh = NULL; 2113 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2114 2115 init_waitqueue_head(&osb->osb_mount_event); 2116 2117 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2118 if (status) { 2119 mlog_errno(status); 2120 goto bail; 2121 } 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 bail; 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 bail; 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 bail; 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 bail; 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 bail; 2169 } 2170 2171 if (ocfs2_clusterinfo_valid(osb)) { 2172 osb->osb_stackflags = 2173 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2174 strlcpy(osb->osb_cluster_stack, 2175 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2176 OCFS2_STACK_LABEL_LEN + 1); 2177 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2178 mlog(ML_ERROR, 2179 "couldn't mount because of an invalid " 2180 "cluster stack label (%s) \n", 2181 osb->osb_cluster_stack); 2182 status = -EINVAL; 2183 goto bail; 2184 } 2185 strlcpy(osb->osb_cluster_name, 2186 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2187 OCFS2_CLUSTER_NAME_LEN + 1); 2188 } else { 2189 /* The empty string is identical with classic tools that 2190 * don't know about s_cluster_info. */ 2191 osb->osb_cluster_stack[0] = '\0'; 2192 } 2193 2194 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2195 2196 /* FIXME 2197 * This should be done in ocfs2_journal_init(), but unknown 2198 * ordering issues will cause the filesystem to crash. 2199 * If anyone wants to figure out what part of the code 2200 * refers to osb->journal before ocfs2_journal_init() is run, 2201 * be my guest. 2202 */ 2203 /* initialize our journal structure */ 2204 2205 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2206 if (!journal) { 2207 mlog(ML_ERROR, "unable to alloc journal\n"); 2208 status = -ENOMEM; 2209 goto bail; 2210 } 2211 osb->journal = journal; 2212 journal->j_osb = osb; 2213 2214 atomic_set(&journal->j_num_trans, 0); 2215 init_rwsem(&journal->j_trans_barrier); 2216 init_waitqueue_head(&journal->j_checkpointed); 2217 spin_lock_init(&journal->j_lock); 2218 journal->j_trans_id = (unsigned long) 1; 2219 INIT_LIST_HEAD(&journal->j_la_cleanups); 2220 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2221 journal->j_state = OCFS2_JOURNAL_FREE; 2222 2223 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2224 init_llist_head(&osb->dquot_drop_list); 2225 2226 /* get some pseudo constants for clustersize bits */ 2227 osb->s_clustersize_bits = 2228 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2229 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2230 2231 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2232 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2233 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2234 osb->s_clustersize); 2235 status = -EINVAL; 2236 goto bail; 2237 } 2238 2239 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2240 le32_to_cpu(di->i_clusters)); 2241 2242 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2243 total_blocks); 2244 if (status) { 2245 mlog(ML_ERROR, "Volume too large " 2246 "to mount safely on this system"); 2247 status = -EFBIG; 2248 goto bail; 2249 } 2250 2251 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2252 sizeof(di->id2.i_super.s_uuid))) { 2253 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2254 status = -ENOMEM; 2255 goto bail; 2256 } 2257 2258 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2259 OCFS2_MAX_VOL_LABEL_LEN); 2260 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2261 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2262 osb->first_cluster_group_blkno = 2263 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2264 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2265 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2266 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2267 (unsigned long long)osb->root_blkno, 2268 (unsigned long long)osb->system_dir_blkno, 2269 osb->s_clustersize_bits); 2270 2271 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2272 if (!osb->osb_dlm_debug) { 2273 status = -ENOMEM; 2274 mlog_errno(status); 2275 goto bail; 2276 } 2277 2278 atomic_set(&osb->vol_state, VOLUME_INIT); 2279 2280 /* load root, system_dir, and all global system inodes */ 2281 status = ocfs2_init_global_system_inodes(osb); 2282 if (status < 0) { 2283 mlog_errno(status); 2284 goto bail; 2285 } 2286 2287 /* 2288 * global bitmap 2289 */ 2290 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2291 OCFS2_INVALID_SLOT); 2292 if (!inode) { 2293 status = -EINVAL; 2294 mlog_errno(status); 2295 goto bail; 2296 } 2297 2298 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2299 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2300 iput(inode); 2301 2302 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2303 osb->s_feature_incompat) * 8; 2304 2305 status = ocfs2_init_slot_info(osb); 2306 if (status < 0) { 2307 mlog_errno(status); 2308 goto bail; 2309 } 2310 cleancache_init_shared_fs(sb); 2311 2312 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2313 if (!osb->ocfs2_wq) { 2314 status = -ENOMEM; 2315 mlog_errno(status); 2316 } 2317 2318 bail: 2319 return status; 2320 } 2321 2322 /* 2323 * will return: -EAGAIN if it is ok to keep searching for superblocks 2324 * -EINVAL if there is a bad superblock 2325 * 0 on success 2326 */ 2327 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2328 struct buffer_head *bh, 2329 u32 blksz, 2330 struct ocfs2_blockcheck_stats *stats) 2331 { 2332 int status = -EAGAIN; 2333 2334 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2335 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2336 /* We have to do a raw check of the feature here */ 2337 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2338 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2339 status = ocfs2_block_check_validate(bh->b_data, 2340 bh->b_size, 2341 &di->i_check, 2342 stats); 2343 if (status) 2344 goto out; 2345 } 2346 status = -EINVAL; 2347 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2348 mlog(ML_ERROR, "found superblock with incorrect block " 2349 "size: found %u, should be %u\n", 2350 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2351 blksz); 2352 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2353 OCFS2_MAJOR_REV_LEVEL || 2354 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2355 OCFS2_MINOR_REV_LEVEL) { 2356 mlog(ML_ERROR, "found superblock with bad version: " 2357 "found %u.%u, should be %u.%u\n", 2358 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2359 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2360 OCFS2_MAJOR_REV_LEVEL, 2361 OCFS2_MINOR_REV_LEVEL); 2362 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2363 mlog(ML_ERROR, "bad block number on superblock: " 2364 "found %llu, should be %llu\n", 2365 (unsigned long long)le64_to_cpu(di->i_blkno), 2366 (unsigned long long)bh->b_blocknr); 2367 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2368 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2369 mlog(ML_ERROR, "bad cluster size found: %u\n", 2370 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2371 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2372 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2373 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2374 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2375 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2376 mlog(ML_ERROR, 2377 "Superblock slots found greater than file system " 2378 "maximum: found %u, max %u\n", 2379 le16_to_cpu(di->id2.i_super.s_max_slots), 2380 OCFS2_MAX_SLOTS); 2381 } else { 2382 /* found it! */ 2383 status = 0; 2384 } 2385 } 2386 2387 out: 2388 if (status && status != -EAGAIN) 2389 mlog_errno(status); 2390 return status; 2391 } 2392 2393 static int ocfs2_check_volume(struct ocfs2_super *osb) 2394 { 2395 int status; 2396 int dirty; 2397 int local; 2398 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2399 * recover 2400 * ourselves. */ 2401 2402 /* Init our journal object. */ 2403 status = ocfs2_journal_init(osb->journal, &dirty); 2404 if (status < 0) { 2405 mlog(ML_ERROR, "Could not initialize journal!\n"); 2406 goto finally; 2407 } 2408 2409 /* Now that journal has been initialized, check to make sure 2410 entire volume is addressable. */ 2411 status = ocfs2_journal_addressable(osb); 2412 if (status) 2413 goto finally; 2414 2415 /* If the journal was unmounted cleanly then we don't want to 2416 * recover anything. Otherwise, journal_load will do that 2417 * dirty work for us :) */ 2418 if (!dirty) { 2419 status = ocfs2_journal_wipe(osb->journal, 0); 2420 if (status < 0) { 2421 mlog_errno(status); 2422 goto finally; 2423 } 2424 } else { 2425 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2426 "unmounted cleanly, recovering it.\n", osb->dev_str); 2427 } 2428 2429 local = ocfs2_mount_local(osb); 2430 2431 /* will play back anything left in the journal. */ 2432 status = ocfs2_journal_load(osb->journal, local, dirty); 2433 if (status < 0) { 2434 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2435 goto finally; 2436 } 2437 2438 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2439 jbd2_journal_set_features(osb->journal->j_journal, 2440 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2441 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2442 else 2443 jbd2_journal_clear_features(osb->journal->j_journal, 2444 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2445 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2446 2447 if (dirty) { 2448 /* recover my local alloc if we didn't unmount cleanly. */ 2449 status = ocfs2_begin_local_alloc_recovery(osb, 2450 osb->slot_num, 2451 &local_alloc); 2452 if (status < 0) { 2453 mlog_errno(status); 2454 goto finally; 2455 } 2456 /* we complete the recovery process after we've marked 2457 * ourselves as mounted. */ 2458 } 2459 2460 status = ocfs2_load_local_alloc(osb); 2461 if (status < 0) { 2462 mlog_errno(status); 2463 goto finally; 2464 } 2465 2466 if (dirty) { 2467 /* Recovery will be completed after we've mounted the 2468 * rest of the volume. */ 2469 osb->local_alloc_copy = local_alloc; 2470 local_alloc = NULL; 2471 } 2472 2473 /* go through each journal, trylock it and if you get the 2474 * lock, and it's marked as dirty, set the bit in the recover 2475 * map and launch a recovery thread for it. */ 2476 status = ocfs2_mark_dead_nodes(osb); 2477 if (status < 0) { 2478 mlog_errno(status); 2479 goto finally; 2480 } 2481 2482 status = ocfs2_compute_replay_slots(osb); 2483 if (status < 0) 2484 mlog_errno(status); 2485 2486 finally: 2487 kfree(local_alloc); 2488 2489 if (status) 2490 mlog_errno(status); 2491 return status; 2492 } 2493 2494 /* 2495 * The routine gets called from dismount or close whenever a dismount on 2496 * volume is requested and the osb open count becomes 1. 2497 * It will remove the osb from the global list and also free up all the 2498 * initialized resources and fileobject. 2499 */ 2500 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2501 { 2502 /* This function assumes that the caller has the main osb resource */ 2503 2504 /* ocfs2_initializer_super have already created this workqueue */ 2505 if (osb->ocfs2_wq) 2506 destroy_workqueue(osb->ocfs2_wq); 2507 2508 ocfs2_free_slot_info(osb); 2509 2510 kfree(osb->osb_orphan_wipes); 2511 kfree(osb->slot_recovery_generations); 2512 /* FIXME 2513 * This belongs in journal shutdown, but because we have to 2514 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2515 * we free it here. 2516 */ 2517 kfree(osb->journal); 2518 kfree(osb->local_alloc_copy); 2519 kfree(osb->uuid_str); 2520 kfree(osb->vol_label); 2521 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2522 memset(osb, 0, sizeof(struct ocfs2_super)); 2523 } 2524 2525 /* Depending on the mount option passed, perform one of the following: 2526 * Put OCFS2 into a readonly state (default) 2527 * Return EIO so that only the process errs 2528 * Fix the error as if fsck.ocfs2 -y 2529 * panic 2530 */ 2531 static int ocfs2_handle_error(struct super_block *sb) 2532 { 2533 struct ocfs2_super *osb = OCFS2_SB(sb); 2534 int rv = 0; 2535 2536 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2537 pr_crit("On-disk corruption discovered. " 2538 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2539 2540 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2541 panic("OCFS2: (device %s): panic forced after error\n", 2542 sb->s_id); 2543 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2544 pr_crit("OCFS2: Returning error to the calling process.\n"); 2545 rv = -EIO; 2546 } else { /* default option */ 2547 rv = -EROFS; 2548 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb))) 2549 return rv; 2550 2551 pr_crit("OCFS2: File system is now read-only.\n"); 2552 sb->s_flags |= SB_RDONLY; 2553 ocfs2_set_ro_flag(osb, 0); 2554 } 2555 2556 return rv; 2557 } 2558 2559 int __ocfs2_error(struct super_block *sb, const char *function, 2560 const char *fmt, ...) 2561 { 2562 struct va_format vaf; 2563 va_list args; 2564 2565 va_start(args, fmt); 2566 vaf.fmt = fmt; 2567 vaf.va = &args; 2568 2569 /* Not using mlog here because we want to show the actual 2570 * function the error came from. */ 2571 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2572 sb->s_id, function, &vaf); 2573 2574 va_end(args); 2575 2576 return ocfs2_handle_error(sb); 2577 } 2578 2579 /* Handle critical errors. This is intentionally more drastic than 2580 * ocfs2_handle_error, so we only use for things like journal errors, 2581 * etc. */ 2582 void __ocfs2_abort(struct super_block *sb, const char *function, 2583 const char *fmt, ...) 2584 { 2585 struct va_format vaf; 2586 va_list args; 2587 2588 va_start(args, fmt); 2589 2590 vaf.fmt = fmt; 2591 vaf.va = &args; 2592 2593 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2594 sb->s_id, function, &vaf); 2595 2596 va_end(args); 2597 2598 /* We don't have the cluster support yet to go straight to 2599 * hard readonly in here. Until then, we want to keep 2600 * ocfs2_abort() so that we can at least mark critical 2601 * errors. 2602 * 2603 * TODO: This should abort the journal and alert other nodes 2604 * that our slot needs recovery. */ 2605 2606 /* Force a panic(). This stinks, but it's better than letting 2607 * things continue without having a proper hard readonly 2608 * here. */ 2609 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2610 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2611 ocfs2_handle_error(sb); 2612 } 2613 2614 /* 2615 * Void signal blockers, because in-kernel sigprocmask() only fails 2616 * when SIG_* is wrong. 2617 */ 2618 void ocfs2_block_signals(sigset_t *oldset) 2619 { 2620 int rc; 2621 sigset_t blocked; 2622 2623 sigfillset(&blocked); 2624 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2625 BUG_ON(rc); 2626 } 2627 2628 void ocfs2_unblock_signals(sigset_t *oldset) 2629 { 2630 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2631 BUG_ON(rc); 2632 } 2633 2634 module_init(ocfs2_init); 2635 module_exit(ocfs2_exit); 2636