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super.c
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linux-6.19.14/fs/ocfs2/super.c
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * super.c 4 * 5 * load/unload driver, mount/dismount volumes 6 * 7 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 8 */ 9 10#include <linux/module.h> 11#include <linux/fs.h> 12#include <linux/types.h> 13#include <linux/slab.h> 14#include <linux/highmem.h> 15#include <linux/init.h> 16#include <linux/random.h> 17#include <linux/statfs.h> 18#include <linux/moduleparam.h> 19#include <linux/blkdev.h> 20#include <linux/socket.h> 21#include <linux/inet.h> 22#include <linux/fs_parser.h> 23#include <linux/fs_context.h> 24#include <linux/crc32.h> 25#include <linux/debugfs.h> 26#include <linux/seq_file.h> 27#include <linux/quotaops.h> 28#include <linux/signal.h> 29 30#define CREATE_TRACE_POINTS 31#include "ocfs2_trace.h" 32 33#include <cluster/masklog.h> 34 35#include "ocfs2.h" 36 37/* this should be the only file to include a version 1 header */ 38#include "ocfs1_fs_compat.h" 39 40#include "alloc.h" 41#include "aops.h" 42#include "blockcheck.h" 43#include "dlmglue.h" 44#include "export.h" 45#include "extent_map.h" 46#include "heartbeat.h" 47#include "inode.h" 48#include "journal.h" 49#include "localalloc.h" 50#include "namei.h" 51#include "slot_map.h" 52#include "super.h" 53#include "sysfile.h" 54#include "uptodate.h" 55#include "xattr.h" 56#include "quota.h" 57#include "refcounttree.h" 58#include "suballoc.h" 59 60#include "buffer_head_io.h" 61#include "filecheck.h" 62 63static struct kmem_cache *ocfs2_inode_cachep; 64struct kmem_cache *ocfs2_dquot_cachep; 65struct kmem_cache *ocfs2_qf_chunk_cachep; 66 67static struct dentry *ocfs2_debugfs_root; 68 69MODULE_AUTHOR("Oracle"); 70MODULE_LICENSE("GPL"); 71MODULE_DESCRIPTION("OCFS2 cluster file system"); 72 73struct mount_options 74{ 75 unsigned long commit_interval; 76 unsigned long mount_opt; 77 unsigned int atime_quantum; 78 unsigned short slot; 79 int localalloc_opt; 80 unsigned int resv_level; 81 int dir_resv_level; 82 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 83 bool user_stack; 84}; 85 86static int ocfs2_parse_param(struct fs_context *fc, struct fs_parameter *param); 87static int ocfs2_check_set_options(struct super_block *sb, 88 struct mount_options *options); 89static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 90static void ocfs2_put_super(struct super_block *sb); 91static int ocfs2_mount_volume(struct super_block *sb); 92static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 93static int ocfs2_initialize_mem_caches(void); 94static void ocfs2_free_mem_caches(void); 95static void ocfs2_delete_osb(struct ocfs2_super *osb); 96 97static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 98 99static int ocfs2_sync_fs(struct super_block *sb, int wait); 100 101static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 102static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 103static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 104static int ocfs2_check_volume(struct ocfs2_super *osb); 105static int ocfs2_verify_volume(struct ocfs2_dinode *di, 106 struct buffer_head *bh, 107 u32 sectsize, 108 struct ocfs2_blockcheck_stats *stats); 109static int ocfs2_initialize_super(struct super_block *sb, 110 struct buffer_head *bh, 111 int sector_size, 112 struct ocfs2_blockcheck_stats *stats); 113static int ocfs2_get_sector(struct super_block *sb, 114 struct buffer_head **bh, 115 int block, 116 int sect_size); 117static struct inode *ocfs2_alloc_inode(struct super_block *sb); 118static void ocfs2_free_inode(struct inode *inode); 119static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 120static int ocfs2_enable_quotas(struct ocfs2_super *osb); 121static void ocfs2_disable_quotas(struct ocfs2_super *osb); 122 123static struct dquot __rcu **ocfs2_get_dquots(struct inode *inode) 124{ 125 return OCFS2_I(inode)->i_dquot; 126} 127 128static const struct super_operations ocfs2_sops = { 129 .statfs = ocfs2_statfs, 130 .alloc_inode = ocfs2_alloc_inode, 131 .free_inode = ocfs2_free_inode, 132 .drop_inode = inode_just_drop, 133 .evict_inode = ocfs2_evict_inode, 134 .sync_fs = ocfs2_sync_fs, 135 .put_super = ocfs2_put_super, 136 .show_options = ocfs2_show_options, 137 .quota_read = ocfs2_quota_read, 138 .quota_write = ocfs2_quota_write, 139 .get_dquots = ocfs2_get_dquots, 140}; 141 142enum { 143 Opt_barrier, 144 Opt_errors, 145 Opt_intr, 146 Opt_heartbeat, 147 Opt_data, 148 Opt_atime_quantum, 149 Opt_slot, 150 Opt_commit, 151 Opt_localalloc, 152 Opt_localflocks, 153 Opt_stack, 154 Opt_user_xattr, 155 Opt_inode64, 156 Opt_acl, 157 Opt_usrquota, 158 Opt_grpquota, 159 Opt_coherency, 160 Opt_resv_level, 161 Opt_dir_resv_level, 162 Opt_journal_async_commit, 163}; 164 165static const struct constant_table ocfs2_param_errors[] = { 166 {"panic", OCFS2_MOUNT_ERRORS_PANIC}, 167 {"remount-ro", OCFS2_MOUNT_ERRORS_ROFS}, 168 {"continue", OCFS2_MOUNT_ERRORS_CONT}, 169 {} 170}; 171 172static const struct constant_table ocfs2_param_heartbeat[] = { 173 {"local", OCFS2_MOUNT_HB_LOCAL}, 174 {"none", OCFS2_MOUNT_HB_NONE}, 175 {"global", OCFS2_MOUNT_HB_GLOBAL}, 176 {} 177}; 178 179static const struct constant_table ocfs2_param_data[] = { 180 {"writeback", OCFS2_MOUNT_DATA_WRITEBACK}, 181 {"ordered", 0}, 182 {} 183}; 184 185static const struct constant_table ocfs2_param_coherency[] = { 186 {"buffered", OCFS2_MOUNT_COHERENCY_BUFFERED}, 187 {"full", 0}, 188 {} 189}; 190 191static const struct fs_parameter_spec ocfs2_param_spec[] = { 192 fsparam_u32 ("barrier", Opt_barrier), 193 fsparam_enum ("errors", Opt_errors, ocfs2_param_errors), 194 fsparam_flag_no ("intr", Opt_intr), 195 fsparam_enum ("heartbeat", Opt_heartbeat, ocfs2_param_heartbeat), 196 fsparam_enum ("data", Opt_data, ocfs2_param_data), 197 fsparam_u32 ("atime_quantum", Opt_atime_quantum), 198 fsparam_u32 ("preferred_slot", Opt_slot), 199 fsparam_u32 ("commit", Opt_commit), 200 fsparam_s32 ("localalloc", Opt_localalloc), 201 fsparam_flag ("localflocks", Opt_localflocks), 202 fsparam_string ("cluster_stack", Opt_stack), 203 fsparam_flag_no ("user_xattr", Opt_user_xattr), 204 fsparam_flag ("inode64", Opt_inode64), 205 fsparam_flag_no ("acl", Opt_acl), 206 fsparam_flag ("usrquota", Opt_usrquota), 207 fsparam_flag ("grpquota", Opt_grpquota), 208 fsparam_enum ("coherency", Opt_coherency, ocfs2_param_coherency), 209 fsparam_u32 ("resv_level", Opt_resv_level), 210 fsparam_u32 ("dir_resv_level", Opt_dir_resv_level), 211 fsparam_flag ("journal_async_commit", Opt_journal_async_commit), 212 {} 213}; 214 215#ifdef CONFIG_DEBUG_FS 216static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 217{ 218 struct ocfs2_cluster_connection *cconn = osb->cconn; 219 struct ocfs2_recovery_map *rm = osb->recovery_map; 220 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 221 int i, out = 0; 222 unsigned long flags; 223 224 out += scnprintf(buf + out, len - out, 225 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 226 "Device", osb->dev_str, osb->uuid_str, 227 osb->fs_generation, osb->vol_label); 228 229 out += scnprintf(buf + out, len - out, 230 "%10s => State: %d Flags: 0x%lX\n", "Volume", 231 atomic_read(&osb->vol_state), osb->osb_flags); 232 233 out += scnprintf(buf + out, len - out, 234 "%10s => Block: %lu Cluster: %d\n", "Sizes", 235 osb->sb->s_blocksize, osb->s_clustersize); 236 237 out += scnprintf(buf + out, len - out, 238 "%10s => Compat: 0x%X Incompat: 0x%X " 239 "ROcompat: 0x%X\n", 240 "Features", osb->s_feature_compat, 241 osb->s_feature_incompat, osb->s_feature_ro_compat); 242 243 out += scnprintf(buf + out, len - out, 244 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 245 osb->s_mount_opt, osb->s_atime_quantum); 246 247 if (cconn) { 248 out += scnprintf(buf + out, len - out, 249 "%10s => Stack: %s Name: %*s " 250 "Version: %d.%d\n", "Cluster", 251 (*osb->osb_cluster_stack == '\0' ? 252 "o2cb" : osb->osb_cluster_stack), 253 cconn->cc_namelen, cconn->cc_name, 254 cconn->cc_version.pv_major, 255 cconn->cc_version.pv_minor); 256 } 257 258 spin_lock_irqsave(&osb->dc_task_lock, flags); 259 out += scnprintf(buf + out, len - out, 260 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 261 "WorkSeq: %lu\n", "DownCnvt", 262 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 263 osb->blocked_lock_count, osb->dc_wake_sequence, 264 osb->dc_work_sequence); 265 spin_unlock_irqrestore(&osb->dc_task_lock, flags); 266 267 spin_lock(&osb->osb_lock); 268 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 269 "Recovery", 270 (osb->recovery_thread_task ? 271 task_pid_nr(osb->recovery_thread_task) : -1)); 272 if (rm->rm_used == 0) 273 out += scnprintf(buf + out, len - out, " None\n"); 274 else { 275 for (i = 0; i < rm->rm_used; i++) 276 out += scnprintf(buf + out, len - out, " %d", 277 rm->rm_entries[i]); 278 out += scnprintf(buf + out, len - out, "\n"); 279 } 280 spin_unlock(&osb->osb_lock); 281 282 out += scnprintf(buf + out, len - out, 283 "%10s => Pid: %d Interval: %lu\n", "Commit", 284 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 285 osb->osb_commit_interval); 286 287 out += scnprintf(buf + out, len - out, 288 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 289 "Journal", osb->journal->j_state, 290 osb->journal->j_trans_id, 291 atomic_read(&osb->journal->j_num_trans)); 292 293 out += scnprintf(buf + out, len - out, 294 "%10s => GlobalAllocs: %d LocalAllocs: %d " 295 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 296 "Stats", 297 atomic_read(&osb->alloc_stats.bitmap_data), 298 atomic_read(&osb->alloc_stats.local_data), 299 atomic_read(&osb->alloc_stats.bg_allocs), 300 atomic_read(&osb->alloc_stats.moves), 301 atomic_read(&osb->alloc_stats.bg_extends)); 302 303 out += scnprintf(buf + out, len - out, 304 "%10s => State: %u Descriptor: %llu Size: %u bits " 305 "Default: %u bits\n", 306 "LocalAlloc", osb->local_alloc_state, 307 (unsigned long long)osb->la_last_gd, 308 osb->local_alloc_bits, osb->local_alloc_default_bits); 309 310 spin_lock(&osb->osb_lock); 311 out += scnprintf(buf + out, len - out, 312 "%10s => InodeSlot: %d StolenInodes: %d, " 313 "MetaSlot: %d StolenMeta: %d\n", "Steal", 314 osb->s_inode_steal_slot, 315 atomic_read(&osb->s_num_inodes_stolen), 316 osb->s_meta_steal_slot, 317 atomic_read(&osb->s_num_meta_stolen)); 318 spin_unlock(&osb->osb_lock); 319 320 out += scnprintf(buf + out, len - out, "OrphanScan => "); 321 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ", 322 os->os_count, os->os_seqno); 323 out += scnprintf(buf + out, len - out, " Last Scan: "); 324 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 325 out += scnprintf(buf + out, len - out, "Disabled\n"); 326 else 327 out += scnprintf(buf + out, len - out, "%lu seconds ago\n", 328 (unsigned long)(ktime_get_seconds() - os->os_scantime)); 329 330 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n", 331 "Slots", "Num", "RecoGen"); 332 for (i = 0; i < osb->max_slots; ++i) { 333 out += scnprintf(buf + out, len - out, 334 "%10s %c %3d %10d\n", 335 " ", 336 (i == osb->slot_num ? '*' : ' '), 337 i, osb->slot_recovery_generations[i]); 338 } 339 340 return out; 341} 342 343static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 344{ 345 struct ocfs2_super *osb = inode->i_private; 346 char *buf = NULL; 347 348 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 349 if (!buf) 350 goto bail; 351 352 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 353 354 file->private_data = buf; 355 356 return 0; 357bail: 358 return -ENOMEM; 359} 360 361static int ocfs2_debug_release(struct inode *inode, struct file *file) 362{ 363 kfree(file->private_data); 364 return 0; 365} 366 367static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 368 size_t nbytes, loff_t *ppos) 369{ 370 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 371 i_size_read(file->f_mapping->host)); 372} 373#else 374static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 375{ 376 return 0; 377} 378static int ocfs2_debug_release(struct inode *inode, struct file *file) 379{ 380 return 0; 381} 382static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 383 size_t nbytes, loff_t *ppos) 384{ 385 return 0; 386} 387#endif /* CONFIG_DEBUG_FS */ 388 389static const struct file_operations ocfs2_osb_debug_fops = { 390 .open = ocfs2_osb_debug_open, 391 .release = ocfs2_debug_release, 392 .read = ocfs2_debug_read, 393 .llseek = generic_file_llseek, 394}; 395 396static int ocfs2_sync_fs(struct super_block *sb, int wait) 397{ 398 int status; 399 tid_t target; 400 struct ocfs2_super *osb = OCFS2_SB(sb); 401 402 if (ocfs2_is_hard_readonly(osb)) 403 return -EROFS; 404 405 if (wait) { 406 status = ocfs2_flush_truncate_log(osb); 407 if (status < 0) 408 mlog_errno(status); 409 } else { 410 ocfs2_schedule_truncate_log_flush(osb, 0); 411 } 412 413 if (jbd2_journal_start_commit(osb->journal->j_journal, 414 &target)) { 415 if (wait) 416 jbd2_log_wait_commit(osb->journal->j_journal, 417 target); 418 } 419 return 0; 420} 421 422static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 423{ 424 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 425 && (ino == USER_QUOTA_SYSTEM_INODE 426 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 427 return 0; 428 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 429 && (ino == GROUP_QUOTA_SYSTEM_INODE 430 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 431 return 0; 432 return 1; 433} 434 435static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 436{ 437 struct inode *new = NULL; 438 int status = 0; 439 int i; 440 441 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 442 if (IS_ERR(new)) { 443 status = PTR_ERR(new); 444 mlog_errno(status); 445 goto bail; 446 } 447 osb->root_inode = new; 448 449 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 450 if (IS_ERR(new)) { 451 status = PTR_ERR(new); 452 mlog_errno(status); 453 goto bail; 454 } 455 osb->sys_root_inode = new; 456 457 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 458 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 459 if (!ocfs2_need_system_inode(osb, i)) 460 continue; 461 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 462 if (!new) { 463 ocfs2_release_system_inodes(osb); 464 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 465 mlog_errno(status); 466 mlog(ML_ERROR, "Unable to load system inode %d, " 467 "possibly corrupt fs?", i); 468 goto bail; 469 } 470 // the array now has one ref, so drop this one 471 iput(new); 472 } 473 474bail: 475 if (status) 476 mlog_errno(status); 477 return status; 478} 479 480static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 481{ 482 struct inode *new = NULL; 483 int status = 0; 484 int i; 485 486 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 487 i < NUM_SYSTEM_INODES; 488 i++) { 489 if (!ocfs2_need_system_inode(osb, i)) 490 continue; 491 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 492 if (!new) { 493 ocfs2_release_system_inodes(osb); 494 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 495 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 496 status, i, osb->slot_num); 497 goto bail; 498 } 499 /* the array now has one ref, so drop this one */ 500 iput(new); 501 } 502 503bail: 504 if (status) 505 mlog_errno(status); 506 return status; 507} 508 509static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 510{ 511 int i; 512 struct inode *inode; 513 514 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 515 inode = osb->global_system_inodes[i]; 516 if (inode) { 517 iput(inode); 518 osb->global_system_inodes[i] = NULL; 519 } 520 } 521 522 inode = osb->sys_root_inode; 523 if (inode) { 524 iput(inode); 525 osb->sys_root_inode = NULL; 526 } 527 528 inode = osb->root_inode; 529 if (inode) { 530 iput(inode); 531 osb->root_inode = NULL; 532 } 533 534 if (!osb->local_system_inodes) 535 return; 536 537 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 538 if (osb->local_system_inodes[i]) { 539 iput(osb->local_system_inodes[i]); 540 osb->local_system_inodes[i] = NULL; 541 } 542 } 543 544 kfree(osb->local_system_inodes); 545 osb->local_system_inodes = NULL; 546} 547 548/* We're allocating fs objects, use GFP_NOFS */ 549static struct inode *ocfs2_alloc_inode(struct super_block *sb) 550{ 551 struct ocfs2_inode_info *oi; 552 553 oi = alloc_inode_sb(sb, ocfs2_inode_cachep, GFP_NOFS); 554 if (!oi) 555 return NULL; 556 557 oi->i_sync_tid = 0; 558 oi->i_datasync_tid = 0; 559 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 560 561 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 562 return &oi->vfs_inode; 563} 564 565static void ocfs2_free_inode(struct inode *inode) 566{ 567 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 568} 569 570static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 571 unsigned int cbits) 572{ 573 unsigned int bytes = 1 << cbits; 574 unsigned int trim = bytes; 575 unsigned int bitshift = 32; 576 577 /* 578 * i_size and all block offsets in ocfs2 are always 64 bits 579 * wide. i_clusters is 32 bits, in cluster-sized units. So on 580 * 64 bit platforms, cluster size will be the limiting factor. 581 */ 582 583#if BITS_PER_LONG == 32 584 BUILD_BUG_ON(sizeof(sector_t) != 8); 585 /* 586 * We might be limited by page cache size. 587 */ 588 if (bytes > PAGE_SIZE) { 589 bytes = PAGE_SIZE; 590 trim = 1; 591 /* 592 * Shift by 31 here so that we don't get larger than 593 * MAX_LFS_FILESIZE 594 */ 595 bitshift = 31; 596 } 597#endif 598 599 /* 600 * Trim by a whole cluster when we can actually approach the 601 * on-disk limits. Otherwise we can overflow i_clusters when 602 * an extent start is at the max offset. 603 */ 604 return (((unsigned long long)bytes) << bitshift) - trim; 605} 606 607static int ocfs2_reconfigure(struct fs_context *fc) 608{ 609 int incompat_features; 610 int ret = 0; 611 struct mount_options *parsed_options = fc->fs_private; 612 struct super_block *sb = fc->root->d_sb; 613 struct ocfs2_super *osb = OCFS2_SB(sb); 614 u32 tmp; 615 616 sync_filesystem(sb); 617 618 if (!ocfs2_check_set_options(sb, parsed_options)) { 619 ret = -EINVAL; 620 goto out; 621 } 622 623 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 624 OCFS2_MOUNT_HB_NONE; 625 if ((osb->s_mount_opt & tmp) != (parsed_options->mount_opt & tmp)) { 626 ret = -EINVAL; 627 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 628 goto out; 629 } 630 631 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 632 (parsed_options->mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 633 ret = -EINVAL; 634 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 635 goto out; 636 } 637 638 /* Probably don't want this on remount; it might 639 * mess with other nodes */ 640 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 641 (parsed_options->mount_opt & OCFS2_MOUNT_INODE64)) { 642 ret = -EINVAL; 643 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 644 goto out; 645 } 646 647 /* We're going to/from readonly mode. */ 648 if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 649 /* Disable quota accounting before remounting RO */ 650 if (fc->sb_flags & SB_RDONLY) { 651 ret = ocfs2_susp_quotas(osb, 0); 652 if (ret < 0) 653 goto out; 654 } 655 /* Lock here so the check of HARD_RO and the potential 656 * setting of SOFT_RO is atomic. */ 657 spin_lock(&osb->osb_lock); 658 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 659 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 660 ret = -EROFS; 661 goto unlock_osb; 662 } 663 664 if (fc->sb_flags & SB_RDONLY) { 665 sb->s_flags |= SB_RDONLY; 666 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 667 } else { 668 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 669 mlog(ML_ERROR, "Cannot remount RDWR " 670 "filesystem due to previous errors.\n"); 671 ret = -EROFS; 672 goto unlock_osb; 673 } 674 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 675 if (incompat_features) { 676 mlog(ML_ERROR, "Cannot remount RDWR because " 677 "of unsupported optional features " 678 "(%x).\n", incompat_features); 679 ret = -EINVAL; 680 goto unlock_osb; 681 } 682 sb->s_flags &= ~SB_RDONLY; 683 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 684 } 685 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, fc->sb_flags); 686unlock_osb: 687 spin_unlock(&osb->osb_lock); 688 /* Enable quota accounting after remounting RW */ 689 if (!ret && !(fc->sb_flags & SB_RDONLY)) { 690 if (sb_any_quota_suspended(sb)) 691 ret = ocfs2_susp_quotas(osb, 1); 692 else 693 ret = ocfs2_enable_quotas(osb); 694 if (ret < 0) { 695 /* Return back changes... */ 696 spin_lock(&osb->osb_lock); 697 sb->s_flags |= SB_RDONLY; 698 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 699 spin_unlock(&osb->osb_lock); 700 goto out; 701 } 702 } 703 } 704 705 if (!ret) { 706 /* Only save off the new mount options in case of a successful 707 * remount. */ 708 osb->s_mount_opt = parsed_options->mount_opt; 709 osb->s_atime_quantum = parsed_options->atime_quantum; 710 osb->preferred_slot = parsed_options->slot; 711 if (parsed_options->commit_interval) 712 osb->osb_commit_interval = parsed_options->commit_interval; 713 714 if (!ocfs2_is_hard_readonly(osb)) 715 ocfs2_set_journal_params(osb); 716 717 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 718 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 719 SB_POSIXACL : 0); 720 } 721out: 722 return ret; 723} 724 725static int ocfs2_sb_probe(struct super_block *sb, 726 struct buffer_head **bh, 727 int *sector_size, 728 struct ocfs2_blockcheck_stats *stats) 729{ 730 int status, tmpstat; 731 struct ocfs1_vol_disk_hdr *hdr; 732 struct ocfs2_dinode *di; 733 int blksize; 734 735 *bh = NULL; 736 737 /* may be > 512 */ 738 *sector_size = bdev_logical_block_size(sb->s_bdev); 739 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 740 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 741 *sector_size, OCFS2_MAX_BLOCKSIZE); 742 status = -EINVAL; 743 goto bail; 744 } 745 746 /* Can this really happen? */ 747 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 748 *sector_size = OCFS2_MIN_BLOCKSIZE; 749 750 /* check block zero for old format */ 751 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 752 if (status < 0) { 753 mlog_errno(status); 754 goto bail; 755 } 756 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 757 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 758 mlog(ML_ERROR, "incompatible version: %u.%u\n", 759 hdr->major_version, hdr->minor_version); 760 status = -EINVAL; 761 } 762 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 763 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 764 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 765 hdr->signature); 766 status = -EINVAL; 767 } 768 brelse(*bh); 769 *bh = NULL; 770 if (status < 0) { 771 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 772 "upgraded before mounting with ocfs v2\n"); 773 goto bail; 774 } 775 776 /* 777 * Now check at magic offset for 512, 1024, 2048, 4096 778 * blocksizes. 4096 is the maximum blocksize because it is 779 * the minimum clustersize. 780 */ 781 status = -EINVAL; 782 for (blksize = *sector_size; 783 blksize <= OCFS2_MAX_BLOCKSIZE; 784 blksize <<= 1) { 785 tmpstat = ocfs2_get_sector(sb, bh, 786 OCFS2_SUPER_BLOCK_BLKNO, 787 blksize); 788 if (tmpstat < 0) { 789 status = tmpstat; 790 mlog_errno(status); 791 break; 792 } 793 di = (struct ocfs2_dinode *) (*bh)->b_data; 794 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 795 spin_lock_init(&stats->b_lock); 796 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 797 if (tmpstat < 0) { 798 brelse(*bh); 799 *bh = NULL; 800 } 801 if (tmpstat != -EAGAIN) { 802 status = tmpstat; 803 break; 804 } 805 } 806 807bail: 808 return status; 809} 810 811static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 812{ 813 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 814 815 if (osb->s_mount_opt & hb_enabled) { 816 if (ocfs2_mount_local(osb)) { 817 mlog(ML_ERROR, "Cannot heartbeat on a locally " 818 "mounted device.\n"); 819 return -EINVAL; 820 } 821 if (ocfs2_userspace_stack(osb)) { 822 mlog(ML_ERROR, "Userspace stack expected, but " 823 "o2cb heartbeat arguments passed to mount\n"); 824 return -EINVAL; 825 } 826 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 827 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 828 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 829 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 830 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 831 return -EINVAL; 832 } 833 } 834 835 if (!(osb->s_mount_opt & hb_enabled)) { 836 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 837 !ocfs2_userspace_stack(osb)) { 838 mlog(ML_ERROR, "Heartbeat has to be started to mount " 839 "a read-write clustered device.\n"); 840 return -EINVAL; 841 } 842 } 843 844 return 0; 845} 846 847/* 848 * If we're using a userspace stack, mount should have passed 849 * a name that matches the disk. If not, mount should not 850 * have passed a stack. 851 */ 852static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 853 struct mount_options *mopt) 854{ 855 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 856 mlog(ML_ERROR, 857 "cluster stack passed to mount, but this filesystem " 858 "does not support it\n"); 859 return -EINVAL; 860 } 861 862 if (ocfs2_userspace_stack(osb) && 863 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 864 OCFS2_STACK_LABEL_LEN)) { 865 mlog(ML_ERROR, 866 "cluster stack passed to mount (\"%s\") does not " 867 "match the filesystem (\"%s\")\n", 868 mopt->cluster_stack, 869 osb->osb_cluster_stack); 870 return -EINVAL; 871 } 872 873 return 0; 874} 875 876static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 877{ 878 int type; 879 struct super_block *sb = osb->sb; 880 unsigned int feature[OCFS2_MAXQUOTAS] = { 881 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 882 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 883 int status = 0; 884 885 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 886 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 887 continue; 888 if (unsuspend) 889 status = dquot_resume(sb, type); 890 else { 891 struct ocfs2_mem_dqinfo *oinfo; 892 893 /* Cancel periodic syncing before suspending */ 894 oinfo = sb_dqinfo(sb, type)->dqi_priv; 895 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 896 status = dquot_suspend(sb, type); 897 } 898 if (status < 0) 899 break; 900 } 901 if (status < 0) 902 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 903 "remount (error = %d).\n", status); 904 return status; 905} 906 907static int ocfs2_enable_quotas(struct ocfs2_super *osb) 908{ 909 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 910 struct super_block *sb = osb->sb; 911 unsigned int feature[OCFS2_MAXQUOTAS] = { 912 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 913 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 914 unsigned int ino[OCFS2_MAXQUOTAS] = { 915 LOCAL_USER_QUOTA_SYSTEM_INODE, 916 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 917 int status; 918 int type; 919 920 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 921 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 922 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 923 continue; 924 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 925 osb->slot_num); 926 if (!inode[type]) { 927 status = -ENOENT; 928 goto out_quota_off; 929 } 930 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2, 931 DQUOT_USAGE_ENABLED); 932 if (status < 0) 933 goto out_quota_off; 934 } 935 936 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 937 iput(inode[type]); 938 return 0; 939out_quota_off: 940 ocfs2_disable_quotas(osb); 941 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 942 iput(inode[type]); 943 mlog_errno(status); 944 return status; 945} 946 947static void ocfs2_disable_quotas(struct ocfs2_super *osb) 948{ 949 int type; 950 struct inode *inode; 951 struct super_block *sb = osb->sb; 952 struct ocfs2_mem_dqinfo *oinfo; 953 954 /* We mostly ignore errors in this function because there's not much 955 * we can do when we see them */ 956 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 957 if (!sb_has_quota_loaded(sb, type)) 958 continue; 959 if (!sb_has_quota_suspended(sb, type)) { 960 oinfo = sb_dqinfo(sb, type)->dqi_priv; 961 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 962 } 963 inode = igrab(sb->s_dquot.files[type]); 964 /* Turn off quotas. This will remove all dquot structures from 965 * memory and so they will be automatically synced to global 966 * quota files */ 967 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 968 DQUOT_LIMITS_ENABLED); 969 iput(inode); 970 } 971} 972 973static int ocfs2_fill_super(struct super_block *sb, struct fs_context *fc) 974{ 975 struct dentry *root; 976 int status, sector_size; 977 struct mount_options *parsed_options = fc->fs_private; 978 struct inode *inode = NULL; 979 struct ocfs2_super *osb = NULL; 980 struct buffer_head *bh = NULL; 981 char nodestr[12]; 982 struct ocfs2_blockcheck_stats stats; 983 984 trace_ocfs2_fill_super(sb, fc, fc->sb_flags & SB_SILENT); 985 986 /* probe for superblock */ 987 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 988 if (status < 0) { 989 mlog(ML_ERROR, "superblock probe failed!\n"); 990 goto out; 991 } 992 993 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 994 brelse(bh); 995 bh = NULL; 996 if (status < 0) 997 goto out; 998 999 osb = OCFS2_SB(sb); 1000 1001 if (!ocfs2_check_set_options(sb, parsed_options)) { 1002 status = -EINVAL; 1003 goto out_super; 1004 } 1005 osb->s_mount_opt = parsed_options->mount_opt; 1006 osb->s_atime_quantum = parsed_options->atime_quantum; 1007 osb->preferred_slot = parsed_options->slot; 1008 osb->osb_commit_interval = parsed_options->commit_interval; 1009 1010 ocfs2_la_set_sizes(osb, parsed_options->localalloc_opt); 1011 osb->osb_resv_level = parsed_options->resv_level; 1012 osb->osb_dir_resv_level = parsed_options->resv_level; 1013 if (parsed_options->dir_resv_level == -1) 1014 osb->osb_dir_resv_level = parsed_options->resv_level; 1015 else 1016 osb->osb_dir_resv_level = parsed_options->dir_resv_level; 1017 1018 status = ocfs2_verify_userspace_stack(osb, parsed_options); 1019 if (status) 1020 goto out_super; 1021 1022 sb->s_magic = OCFS2_SUPER_MAGIC; 1023 1024 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) | 1025 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0); 1026 1027 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY, 1028 * heartbeat=none */ 1029 if (bdev_read_only(sb->s_bdev)) { 1030 if (!sb_rdonly(sb)) { 1031 status = -EACCES; 1032 mlog(ML_ERROR, "Readonly device detected but readonly " 1033 "mount was not specified.\n"); 1034 goto out_super; 1035 } 1036 1037 /* You should not be able to start a local heartbeat 1038 * on a readonly device. */ 1039 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1040 status = -EROFS; 1041 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1042 "device.\n"); 1043 goto out_super; 1044 } 1045 1046 status = ocfs2_check_journals_nolocks(osb); 1047 if (status < 0) { 1048 if (status == -EROFS) 1049 mlog(ML_ERROR, "Recovery required on readonly " 1050 "file system, but write access is " 1051 "unavailable.\n"); 1052 goto out_super; 1053 } 1054 1055 ocfs2_set_ro_flag(osb, 1); 1056 1057 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1058 "Cluster services will not be used for this mount. " 1059 "Recovery will be skipped.\n", osb->dev_str); 1060 } 1061 1062 if (!ocfs2_is_hard_readonly(osb)) { 1063 if (sb_rdonly(sb)) 1064 ocfs2_set_ro_flag(osb, 0); 1065 } 1066 1067 status = ocfs2_verify_heartbeat(osb); 1068 if (status < 0) 1069 goto out_super; 1070 1071 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1072 ocfs2_debugfs_root); 1073 1074 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root, 1075 osb, &ocfs2_osb_debug_fops); 1076 1077 if (ocfs2_meta_ecc(osb)) { 1078 ocfs2_initialize_journal_triggers(sb, osb->s_journal_triggers); 1079 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats, 1080 osb->osb_debug_root); 1081 } 1082 1083 status = ocfs2_mount_volume(sb); 1084 if (status < 0) 1085 goto out_debugfs; 1086 1087 if (osb->root_inode) 1088 inode = igrab(osb->root_inode); 1089 1090 if (!inode) { 1091 status = -EIO; 1092 goto out_dismount; 1093 } 1094 1095 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL, 1096 &ocfs2_kset->kobj); 1097 if (!osb->osb_dev_kset) { 1098 status = -ENOMEM; 1099 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id); 1100 goto out_dismount; 1101 } 1102 1103 /* Create filecheck sysfs related directories/files at 1104 * /sys/fs/ocfs2/<devname>/filecheck */ 1105 if (ocfs2_filecheck_create_sysfs(osb)) { 1106 status = -ENOMEM; 1107 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at " 1108 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id); 1109 goto out_dismount; 1110 } 1111 1112 root = d_make_root(inode); 1113 if (!root) { 1114 status = -ENOMEM; 1115 goto out_dismount; 1116 } 1117 1118 sb->s_root = root; 1119 1120 ocfs2_complete_mount_recovery(osb); 1121 1122 if (ocfs2_mount_local(osb)) 1123 snprintf(nodestr, sizeof(nodestr), "local"); 1124 else 1125 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1126 1127 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1128 "with %s data mode.\n", 1129 osb->dev_str, nodestr, osb->slot_num, 1130 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1131 "ordered"); 1132 1133 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1134 wake_up(&osb->osb_mount_event); 1135 1136 /* Now we can initialize quotas because we can afford to wait 1137 * for cluster locks recovery now. That also means that truncation 1138 * log recovery can happen but that waits for proper quota setup */ 1139 if (!sb_rdonly(sb)) { 1140 status = ocfs2_enable_quotas(osb); 1141 if (status < 0) { 1142 /* We have to err-out specially here because 1143 * s_root is already set */ 1144 mlog_errno(status); 1145 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1146 wake_up(&osb->osb_mount_event); 1147 return status; 1148 } 1149 } 1150 1151 ocfs2_complete_quota_recovery(osb); 1152 1153 /* Now we wake up again for processes waiting for quotas */ 1154 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1155 wake_up(&osb->osb_mount_event); 1156 1157 /* Start this when the mount is almost sure of being successful */ 1158 ocfs2_orphan_scan_start(osb); 1159 1160 return status; 1161 1162out_dismount: 1163 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1164 wake_up(&osb->osb_mount_event); 1165 ocfs2_free_replay_slots(osb); 1166 ocfs2_dismount_volume(sb, 1); 1167 goto out; 1168 1169out_debugfs: 1170 debugfs_remove_recursive(osb->osb_debug_root); 1171out_super: 1172 ocfs2_release_system_inodes(osb); 1173 kfree(osb->recovery_map); 1174 ocfs2_delete_osb(osb); 1175 kfree(osb); 1176out: 1177 mlog_errno(status); 1178 1179 return status; 1180} 1181 1182static int ocfs2_get_tree(struct fs_context *fc) 1183{ 1184 return get_tree_bdev(fc, ocfs2_fill_super); 1185} 1186 1187static void ocfs2_free_fc(struct fs_context *fc) 1188{ 1189 kfree(fc->fs_private); 1190} 1191 1192static const struct fs_context_operations ocfs2_context_ops = { 1193 .parse_param = ocfs2_parse_param, 1194 .get_tree = ocfs2_get_tree, 1195 .reconfigure = ocfs2_reconfigure, 1196 .free = ocfs2_free_fc, 1197}; 1198 1199static int ocfs2_init_fs_context(struct fs_context *fc) 1200{ 1201 struct mount_options *mopt; 1202 1203 mopt = kzalloc(sizeof(struct mount_options), GFP_KERNEL); 1204 if (!mopt) 1205 return -EINVAL; 1206 1207 mopt->commit_interval = 0; 1208 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1209 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1210 mopt->slot = OCFS2_INVALID_SLOT; 1211 mopt->localalloc_opt = -1; 1212 mopt->cluster_stack[0] = '\0'; 1213 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1214 mopt->dir_resv_level = -1; 1215 1216 fc->fs_private = mopt; 1217 fc->ops = &ocfs2_context_ops; 1218 1219 return 0; 1220} 1221 1222static struct file_system_type ocfs2_fs_type = { 1223 .owner = THIS_MODULE, 1224 .name = "ocfs2", 1225 .kill_sb = kill_block_super, 1226 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1227 .next = NULL, 1228 .init_fs_context = ocfs2_init_fs_context, 1229 .parameters = ocfs2_param_spec, 1230}; 1231MODULE_ALIAS_FS("ocfs2"); 1232 1233static int ocfs2_check_set_options(struct super_block *sb, 1234 struct mount_options *options) 1235{ 1236 if (options->user_stack == 0) { 1237 u32 tmp; 1238 1239 /* Ensure only one heartbeat mode */ 1240 tmp = options->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1241 OCFS2_MOUNT_HB_GLOBAL | 1242 OCFS2_MOUNT_HB_NONE); 1243 if (hweight32(tmp) != 1) { 1244 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1245 return 0; 1246 } 1247 } 1248 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1249 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1250 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1251 mlog(ML_ERROR, "User quotas were requested, but this " 1252 "filesystem does not have the feature enabled.\n"); 1253 return 0; 1254 } 1255 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1256 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1257 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1258 mlog(ML_ERROR, "Group quotas were requested, but this " 1259 "filesystem does not have the feature enabled.\n"); 1260 return 0; 1261 } 1262 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1263 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1264 mlog(ML_ERROR, "ACL support requested but extended attributes " 1265 "feature is not enabled\n"); 1266 return 0; 1267 } 1268 /* No ACL setting specified? Use XATTR feature... */ 1269 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1270 OCFS2_MOUNT_NO_POSIX_ACL))) { 1271 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1272 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1273 else 1274 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1275 } 1276 return 1; 1277} 1278 1279static int ocfs2_parse_param(struct fs_context *fc, struct fs_parameter *param) 1280{ 1281 struct fs_parse_result result; 1282 int opt; 1283 struct mount_options *mopt = fc->fs_private; 1284 bool is_remount = (fc->purpose & FS_CONTEXT_FOR_RECONFIGURE); 1285 1286 trace_ocfs2_parse_options(is_remount, param->key); 1287 1288 opt = fs_parse(fc, ocfs2_param_spec, param, &result); 1289 if (opt < 0) 1290 return opt; 1291 1292 switch (opt) { 1293 case Opt_heartbeat: 1294 mopt->mount_opt |= result.uint_32; 1295 break; 1296 case Opt_barrier: 1297 if (result.uint_32) 1298 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1299 else 1300 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1301 break; 1302 case Opt_intr: 1303 if (result.negated) 1304 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1305 else 1306 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1307 break; 1308 case Opt_errors: 1309 mopt->mount_opt &= ~(OCFS2_MOUNT_ERRORS_CONT | 1310 OCFS2_MOUNT_ERRORS_ROFS | 1311 OCFS2_MOUNT_ERRORS_PANIC); 1312 mopt->mount_opt |= result.uint_32; 1313 break; 1314 case Opt_data: 1315 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1316 mopt->mount_opt |= result.uint_32; 1317 break; 1318 case Opt_user_xattr: 1319 if (result.negated) 1320 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1321 else 1322 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1323 break; 1324 case Opt_atime_quantum: 1325 mopt->atime_quantum = result.uint_32; 1326 break; 1327 case Opt_slot: 1328 if (result.uint_32) 1329 mopt->slot = (u16)result.uint_32; 1330 break; 1331 case Opt_commit: 1332 if (result.uint_32 == 0) 1333 mopt->commit_interval = HZ * JBD2_DEFAULT_MAX_COMMIT_AGE; 1334 else 1335 mopt->commit_interval = HZ * result.uint_32; 1336 break; 1337 case Opt_localalloc: 1338 if (result.int_32 >= 0) 1339 mopt->localalloc_opt = result.int_32; 1340 break; 1341 case Opt_localflocks: 1342 /* 1343 * Changing this during remount could race flock() requests, or 1344 * "unbalance" existing ones (e.g., a lock is taken in one mode 1345 * but dropped in the other). If users care enough to flip 1346 * locking modes during remount, we could add a "local" flag to 1347 * individual flock structures for proper tracking of state. 1348 */ 1349 if (!is_remount) 1350 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1351 break; 1352 case Opt_stack: 1353 /* Check both that the option we were passed is of the right 1354 * length and that it is a proper string of the right length. 1355 */ 1356 if (strlen(param->string) != OCFS2_STACK_LABEL_LEN) { 1357 mlog(ML_ERROR, "Invalid cluster_stack option\n"); 1358 return -EINVAL; 1359 } 1360 memcpy(mopt->cluster_stack, param->string, OCFS2_STACK_LABEL_LEN); 1361 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1362 /* 1363 * Open code the memcmp here as we don't have an osb to pass 1364 * to ocfs2_userspace_stack(). 1365 */ 1366 if (memcmp(mopt->cluster_stack, 1367 OCFS2_CLASSIC_CLUSTER_STACK, 1368 OCFS2_STACK_LABEL_LEN)) 1369 mopt->user_stack = 1; 1370 break; 1371 case Opt_inode64: 1372 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1373 break; 1374 case Opt_usrquota: 1375 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1376 break; 1377 case Opt_grpquota: 1378 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1379 break; 1380 case Opt_coherency: 1381 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1382 mopt->mount_opt |= result.uint_32; 1383 break; 1384 case Opt_acl: 1385 if (result.negated) { 1386 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1387 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1388 } else { 1389 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1390 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1391 } 1392 break; 1393 case Opt_resv_level: 1394 if (is_remount) 1395 break; 1396 if (result.uint_32 >= OCFS2_MIN_RESV_LEVEL && 1397 result.uint_32 < OCFS2_MAX_RESV_LEVEL) 1398 mopt->resv_level = result.uint_32; 1399 break; 1400 case Opt_dir_resv_level: 1401 if (is_remount) 1402 break; 1403 if (result.uint_32 >= OCFS2_MIN_RESV_LEVEL && 1404 result.uint_32 < OCFS2_MAX_RESV_LEVEL) 1405 mopt->dir_resv_level = result.uint_32; 1406 break; 1407 case Opt_journal_async_commit: 1408 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1409 break; 1410 default: 1411 return -EINVAL; 1412 } 1413 1414 return 0; 1415} 1416 1417static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1418{ 1419 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1420 unsigned long opts = osb->s_mount_opt; 1421 unsigned int local_alloc_megs; 1422 1423 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1424 seq_printf(s, ",_netdev"); 1425 if (opts & OCFS2_MOUNT_HB_LOCAL) 1426 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1427 else 1428 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1429 } else 1430 seq_printf(s, ",%s", OCFS2_HB_NONE); 1431 1432 if (opts & OCFS2_MOUNT_NOINTR) 1433 seq_printf(s, ",nointr"); 1434 1435 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1436 seq_printf(s, ",data=writeback"); 1437 else 1438 seq_printf(s, ",data=ordered"); 1439 1440 if (opts & OCFS2_MOUNT_BARRIER) 1441 seq_printf(s, ",barrier=1"); 1442 1443 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1444 seq_printf(s, ",errors=panic"); 1445 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1446 seq_printf(s, ",errors=continue"); 1447 else 1448 seq_printf(s, ",errors=remount-ro"); 1449 1450 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1451 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1452 1453 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1454 1455 if (osb->osb_commit_interval) 1456 seq_printf(s, ",commit=%u", 1457 (unsigned) (osb->osb_commit_interval / HZ)); 1458 1459 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1460 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1461 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1462 1463 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1464 seq_printf(s, ",localflocks,"); 1465 1466 if (osb->osb_cluster_stack[0]) 1467 seq_show_option(s, "cluster_stack", osb->osb_cluster_stack); 1468 if (opts & OCFS2_MOUNT_USRQUOTA) 1469 seq_printf(s, ",usrquota"); 1470 if (opts & OCFS2_MOUNT_GRPQUOTA) 1471 seq_printf(s, ",grpquota"); 1472 1473 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1474 seq_printf(s, ",coherency=buffered"); 1475 else 1476 seq_printf(s, ",coherency=full"); 1477 1478 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1479 seq_printf(s, ",nouser_xattr"); 1480 else 1481 seq_printf(s, ",user_xattr"); 1482 1483 if (opts & OCFS2_MOUNT_INODE64) 1484 seq_printf(s, ",inode64"); 1485 1486 if (opts & OCFS2_MOUNT_POSIX_ACL) 1487 seq_printf(s, ",acl"); 1488 else 1489 seq_printf(s, ",noacl"); 1490 1491 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1492 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1493 1494 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1495 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1496 1497 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1498 seq_printf(s, ",journal_async_commit"); 1499 1500 return 0; 1501} 1502 1503static int __init ocfs2_init(void) 1504{ 1505 int status; 1506 1507 status = init_ocfs2_uptodate_cache(); 1508 if (status < 0) 1509 goto out1; 1510 1511 status = ocfs2_initialize_mem_caches(); 1512 if (status < 0) 1513 goto out2; 1514 1515 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1516 1517 ocfs2_set_locking_protocol(); 1518 1519 register_quota_format(&ocfs2_quota_format); 1520 1521 status = register_filesystem(&ocfs2_fs_type); 1522 if (!status) 1523 return 0; 1524 1525 unregister_quota_format(&ocfs2_quota_format); 1526 debugfs_remove(ocfs2_debugfs_root); 1527 ocfs2_free_mem_caches(); 1528out2: 1529 exit_ocfs2_uptodate_cache(); 1530out1: 1531 mlog_errno(status); 1532 return status; 1533} 1534 1535static void __exit ocfs2_exit(void) 1536{ 1537 unregister_quota_format(&ocfs2_quota_format); 1538 1539 debugfs_remove(ocfs2_debugfs_root); 1540 1541 ocfs2_free_mem_caches(); 1542 1543 unregister_filesystem(&ocfs2_fs_type); 1544 1545 exit_ocfs2_uptodate_cache(); 1546} 1547 1548static void ocfs2_put_super(struct super_block *sb) 1549{ 1550 trace_ocfs2_put_super(sb); 1551 1552 ocfs2_sync_blockdev(sb); 1553 ocfs2_dismount_volume(sb, 0); 1554} 1555 1556static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1557{ 1558 struct ocfs2_super *osb; 1559 u32 numbits, freebits; 1560 int status; 1561 struct ocfs2_dinode *bm_lock; 1562 struct buffer_head *bh = NULL; 1563 struct inode *inode = NULL; 1564 1565 trace_ocfs2_statfs(dentry->d_sb, buf); 1566 1567 osb = OCFS2_SB(dentry->d_sb); 1568 1569 inode = ocfs2_get_system_file_inode(osb, 1570 GLOBAL_BITMAP_SYSTEM_INODE, 1571 OCFS2_INVALID_SLOT); 1572 if (!inode) { 1573 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1574 status = -EIO; 1575 goto bail; 1576 } 1577 1578 status = ocfs2_inode_lock(inode, &bh, 0); 1579 if (status < 0) { 1580 mlog_errno(status); 1581 goto bail; 1582 } 1583 1584 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1585 1586 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1587 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1588 1589 buf->f_type = OCFS2_SUPER_MAGIC; 1590 buf->f_bsize = dentry->d_sb->s_blocksize; 1591 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1592 buf->f_blocks = ((sector_t) numbits) * 1593 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1594 buf->f_bfree = ((sector_t) freebits) * 1595 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1596 buf->f_bavail = buf->f_bfree; 1597 buf->f_files = numbits; 1598 buf->f_ffree = freebits; 1599 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1600 & 0xFFFFFFFFUL; 1601 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1602 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1603 1604 brelse(bh); 1605 1606 ocfs2_inode_unlock(inode, 0); 1607 status = 0; 1608bail: 1609 iput(inode); 1610 1611 if (status) 1612 mlog_errno(status); 1613 1614 return status; 1615} 1616 1617static void ocfs2_inode_init_once(void *data) 1618{ 1619 struct ocfs2_inode_info *oi = data; 1620 1621 oi->ip_flags = 0; 1622 oi->ip_open_count = 0; 1623 spin_lock_init(&oi->ip_lock); 1624 ocfs2_extent_map_init(&oi->vfs_inode); 1625 INIT_LIST_HEAD(&oi->ip_io_markers); 1626 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1627 oi->ip_dir_start_lookup = 0; 1628 init_rwsem(&oi->ip_alloc_sem); 1629 init_rwsem(&oi->ip_xattr_sem); 1630 mutex_init(&oi->ip_io_mutex); 1631 1632 oi->ip_blkno = 0ULL; 1633 oi->ip_clusters = 0; 1634 oi->ip_next_orphan = NULL; 1635 1636 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1637 1638 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1639 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1640 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1641 1642 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1643 &ocfs2_inode_caching_ops); 1644 1645 inode_init_once(&oi->vfs_inode); 1646} 1647 1648static int ocfs2_initialize_mem_caches(void) 1649{ 1650 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1651 sizeof(struct ocfs2_inode_info), 1652 0, 1653 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1654 SLAB_ACCOUNT), 1655 ocfs2_inode_init_once); 1656 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1657 sizeof(struct ocfs2_dquot), 1658 0, 1659 SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT, 1660 NULL); 1661 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1662 sizeof(struct ocfs2_quota_chunk), 1663 0, 1664 SLAB_RECLAIM_ACCOUNT, 1665 NULL); 1666 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1667 !ocfs2_qf_chunk_cachep) { 1668 kmem_cache_destroy(ocfs2_inode_cachep); 1669 kmem_cache_destroy(ocfs2_dquot_cachep); 1670 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1671 return -ENOMEM; 1672 } 1673 1674 return 0; 1675} 1676 1677static void ocfs2_free_mem_caches(void) 1678{ 1679 /* 1680 * Make sure all delayed rcu free inodes are flushed before we 1681 * destroy cache. 1682 */ 1683 rcu_barrier(); 1684 kmem_cache_destroy(ocfs2_inode_cachep); 1685 ocfs2_inode_cachep = NULL; 1686 1687 kmem_cache_destroy(ocfs2_dquot_cachep); 1688 ocfs2_dquot_cachep = NULL; 1689 1690 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1691 ocfs2_qf_chunk_cachep = NULL; 1692} 1693 1694static int ocfs2_get_sector(struct super_block *sb, 1695 struct buffer_head **bh, 1696 int block, 1697 int sect_size) 1698{ 1699 if (!sb_set_blocksize(sb, sect_size)) { 1700 mlog(ML_ERROR, "unable to set blocksize\n"); 1701 return -EIO; 1702 } 1703 1704 *bh = sb_getblk(sb, block); 1705 if (!*bh) { 1706 mlog_errno(-ENOMEM); 1707 return -ENOMEM; 1708 } 1709 lock_buffer(*bh); 1710 if (!buffer_dirty(*bh)) 1711 clear_buffer_uptodate(*bh); 1712 unlock_buffer(*bh); 1713 if (bh_read(*bh, 0) < 0) { 1714 mlog_errno(-EIO); 1715 brelse(*bh); 1716 *bh = NULL; 1717 return -EIO; 1718 } 1719 1720 return 0; 1721} 1722 1723static int ocfs2_mount_volume(struct super_block *sb) 1724{ 1725 int status = 0; 1726 struct ocfs2_super *osb = OCFS2_SB(sb); 1727 1728 if (ocfs2_is_hard_readonly(osb)) 1729 goto out; 1730 1731 mutex_init(&osb->obs_trim_fs_mutex); 1732 1733 status = ocfs2_dlm_init(osb); 1734 if (status < 0) { 1735 mlog_errno(status); 1736 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1737 mlog(ML_ERROR, "couldn't mount because cluster name on" 1738 " disk does not match the running cluster name.\n"); 1739 goto out; 1740 } 1741 1742 status = ocfs2_super_lock(osb, 1); 1743 if (status < 0) { 1744 mlog_errno(status); 1745 goto out_dlm; 1746 } 1747 1748 /* This will load up the node map and add ourselves to it. */ 1749 status = ocfs2_find_slot(osb); 1750 if (status < 0) { 1751 mlog_errno(status); 1752 goto out_super_lock; 1753 } 1754 1755 /* load all node-local system inodes */ 1756 status = ocfs2_init_local_system_inodes(osb); 1757 if (status < 0) { 1758 mlog_errno(status); 1759 goto out_super_lock; 1760 } 1761 1762 status = ocfs2_check_volume(osb); 1763 if (status < 0) { 1764 mlog_errno(status); 1765 goto out_system_inodes; 1766 } 1767 1768 status = ocfs2_truncate_log_init(osb); 1769 if (status < 0) { 1770 mlog_errno(status); 1771 goto out_check_volume; 1772 } 1773 1774 ocfs2_super_unlock(osb, 1); 1775 return 0; 1776 1777out_check_volume: 1778 ocfs2_free_replay_slots(osb); 1779out_system_inodes: 1780 if (osb->local_alloc_state == OCFS2_LA_ENABLED) 1781 ocfs2_shutdown_local_alloc(osb); 1782 ocfs2_release_system_inodes(osb); 1783 /* before journal shutdown, we should release slot_info */ 1784 ocfs2_free_slot_info(osb); 1785 ocfs2_journal_shutdown(osb); 1786out_super_lock: 1787 ocfs2_super_unlock(osb, 1); 1788out_dlm: 1789 ocfs2_dlm_shutdown(osb, 0); 1790out: 1791 return status; 1792} 1793 1794static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1795{ 1796 int tmp, hangup_needed = 0; 1797 struct ocfs2_super *osb = NULL; 1798 char nodestr[12]; 1799 1800 trace_ocfs2_dismount_volume(sb); 1801 1802 BUG_ON(!sb); 1803 osb = OCFS2_SB(sb); 1804 BUG_ON(!osb); 1805 1806 /* Remove file check sysfs related directories/files, 1807 * and wait for the pending file check operations */ 1808 ocfs2_filecheck_remove_sysfs(osb); 1809 1810 kset_unregister(osb->osb_dev_kset); 1811 1812 /* Orphan scan should be stopped as early as possible */ 1813 ocfs2_orphan_scan_stop(osb); 1814 1815 /* Stop quota recovery so that we can disable quotas */ 1816 ocfs2_recovery_disable_quota(osb); 1817 1818 ocfs2_disable_quotas(osb); 1819 1820 /* All dquots should be freed by now */ 1821 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1822 /* Wait for worker to be done with the work structure in osb */ 1823 cancel_work_sync(&osb->dquot_drop_work); 1824 1825 ocfs2_shutdown_local_alloc(osb); 1826 1827 ocfs2_truncate_log_shutdown(osb); 1828 1829 /* This will disable recovery and flush any recovery work. */ 1830 ocfs2_recovery_exit(osb); 1831 1832 ocfs2_sync_blockdev(sb); 1833 1834 ocfs2_purge_refcount_trees(osb); 1835 1836 /* No cluster connection means we've failed during mount, so skip 1837 * all the steps which depended on that to complete. */ 1838 if (osb->cconn) { 1839 tmp = ocfs2_super_lock(osb, 1); 1840 if (tmp < 0) { 1841 mlog_errno(tmp); 1842 return; 1843 } 1844 } 1845 1846 if (osb->slot_num != OCFS2_INVALID_SLOT) 1847 ocfs2_put_slot(osb); 1848 1849 if (osb->cconn) 1850 ocfs2_super_unlock(osb, 1); 1851 1852 ocfs2_release_system_inodes(osb); 1853 1854 ocfs2_journal_shutdown(osb); 1855 1856 /* 1857 * If we're dismounting due to mount error, mount.ocfs2 will clean 1858 * up heartbeat. If we're a local mount, there is no heartbeat. 1859 * If we failed before we got a uuid_str yet, we can't stop 1860 * heartbeat. Otherwise, do it. 1861 */ 1862 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1863 !ocfs2_is_hard_readonly(osb)) 1864 hangup_needed = 1; 1865 1866 ocfs2_dlm_shutdown(osb, hangup_needed); 1867 1868 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1869 debugfs_remove_recursive(osb->osb_debug_root); 1870 1871 if (hangup_needed) 1872 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1873 1874 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1875 1876 if (ocfs2_mount_local(osb)) 1877 snprintf(nodestr, sizeof(nodestr), "local"); 1878 else 1879 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1880 1881 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1882 osb->dev_str, nodestr); 1883 1884 ocfs2_delete_osb(osb); 1885 kfree(osb); 1886 sb->s_dev = 0; 1887 sb->s_fs_info = NULL; 1888} 1889 1890static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1891 unsigned uuid_bytes) 1892{ 1893 int i, ret; 1894 char *ptr; 1895 1896 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1897 1898 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1899 if (osb->uuid_str == NULL) 1900 return -ENOMEM; 1901 1902 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1903 /* print with null */ 1904 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1905 if (ret != 2) /* drop super cleans up */ 1906 return -EINVAL; 1907 /* then only advance past the last char */ 1908 ptr += 2; 1909 } 1910 1911 return 0; 1912} 1913 1914/* Make sure entire volume is addressable by our journal. Requires 1915 osb_clusters_at_boot to be valid and for the journal to have been 1916 initialized by ocfs2_journal_init(). */ 1917static int ocfs2_journal_addressable(struct ocfs2_super *osb) 1918{ 1919 int status = 0; 1920 u64 max_block = 1921 ocfs2_clusters_to_blocks(osb->sb, 1922 osb->osb_clusters_at_boot) - 1; 1923 1924 /* 32-bit block number is always OK. */ 1925 if (max_block <= (u32)~0ULL) 1926 goto out; 1927 1928 /* Volume is "huge", so see if our journal is new enough to 1929 support it. */ 1930 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 1931 OCFS2_FEATURE_COMPAT_JBD2_SB) && 1932 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 1933 JBD2_FEATURE_INCOMPAT_64BIT))) { 1934 mlog(ML_ERROR, "The journal cannot address the entire volume. " 1935 "Enable the 'block64' journal option with tunefs.ocfs2"); 1936 status = -EFBIG; 1937 goto out; 1938 } 1939 1940 out: 1941 return status; 1942} 1943 1944static int ocfs2_initialize_super(struct super_block *sb, 1945 struct buffer_head *bh, 1946 int sector_size, 1947 struct ocfs2_blockcheck_stats *stats) 1948{ 1949 int status; 1950 int i, cbits, bbits; 1951 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1952 struct inode *inode = NULL; 1953 struct ocfs2_super *osb; 1954 u64 total_blocks; 1955 1956 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 1957 if (!osb) { 1958 status = -ENOMEM; 1959 mlog_errno(status); 1960 goto out; 1961 } 1962 1963 sb->s_fs_info = osb; 1964 sb->s_op = &ocfs2_sops; 1965 set_default_d_op(sb, &ocfs2_dentry_ops); 1966 sb->s_export_op = &ocfs2_export_ops; 1967 sb->s_qcop = &dquot_quotactl_sysfile_ops; 1968 sb->dq_op = &ocfs2_quota_operations; 1969 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 1970 sb->s_xattr = ocfs2_xattr_handlers; 1971 sb->s_time_gran = 1; 1972 sb->s_flags |= SB_NOATIME; 1973 /* this is needed to support O_LARGEFILE */ 1974 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1975 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 1976 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 1977 super_set_uuid(sb, di->id2.i_super.s_uuid, 1978 sizeof(di->id2.i_super.s_uuid)); 1979 1980 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 1981 1982 for (i = 0; i < 3; i++) 1983 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 1984 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 1985 1986 osb->sb = sb; 1987 osb->s_sectsize_bits = blksize_bits(sector_size); 1988 BUG_ON(!osb->s_sectsize_bits); 1989 1990 spin_lock_init(&osb->dc_task_lock); 1991 init_waitqueue_head(&osb->dc_event); 1992 osb->dc_work_sequence = 0; 1993 osb->dc_wake_sequence = 0; 1994 INIT_LIST_HEAD(&osb->blocked_lock_list); 1995 osb->blocked_lock_count = 0; 1996 spin_lock_init(&osb->osb_lock); 1997 spin_lock_init(&osb->osb_xattr_lock); 1998 ocfs2_init_steal_slots(osb); 1999 2000 mutex_init(&osb->system_file_mutex); 2001 2002 atomic_set(&osb->alloc_stats.moves, 0); 2003 atomic_set(&osb->alloc_stats.local_data, 0); 2004 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2005 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2006 atomic_set(&osb->alloc_stats.bg_extends, 0); 2007 2008 /* Copy the blockcheck stats from the superblock probe */ 2009 osb->osb_ecc_stats = *stats; 2010 2011 ocfs2_init_node_maps(osb); 2012 2013 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2014 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2015 2016 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2017 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2018 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2019 osb->max_slots); 2020 status = -EINVAL; 2021 goto out; 2022 } 2023 2024 ocfs2_orphan_scan_init(osb); 2025 2026 status = ocfs2_recovery_init(osb); 2027 if (status) { 2028 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2029 mlog_errno(status); 2030 goto out; 2031 } 2032 2033 init_waitqueue_head(&osb->checkpoint_event); 2034 2035 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2036 2037 osb->slot_num = OCFS2_INVALID_SLOT; 2038 2039 osb->s_xattr_inline_size = le16_to_cpu( 2040 di->id2.i_super.s_xattr_inline_size); 2041 2042 osb->local_alloc_state = OCFS2_LA_UNUSED; 2043 osb->local_alloc_bh = NULL; 2044 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2045 2046 init_waitqueue_head(&osb->osb_mount_event); 2047 2048 ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2049 2050 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2051 if (!osb->vol_label) { 2052 mlog(ML_ERROR, "unable to alloc vol label\n"); 2053 status = -ENOMEM; 2054 goto out_recovery_map; 2055 } 2056 2057 osb->slot_recovery_generations = 2058 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2059 GFP_KERNEL); 2060 if (!osb->slot_recovery_generations) { 2061 status = -ENOMEM; 2062 mlog_errno(status); 2063 goto out_vol_label; 2064 } 2065 2066 init_waitqueue_head(&osb->osb_wipe_event); 2067 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2068 sizeof(*osb->osb_orphan_wipes), 2069 GFP_KERNEL); 2070 if (!osb->osb_orphan_wipes) { 2071 status = -ENOMEM; 2072 mlog_errno(status); 2073 goto out_slot_recovery_gen; 2074 } 2075 2076 osb->osb_rf_lock_tree = RB_ROOT; 2077 2078 osb->s_feature_compat = 2079 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2080 osb->s_feature_ro_compat = 2081 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2082 osb->s_feature_incompat = 2083 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2084 2085 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2086 mlog(ML_ERROR, "couldn't mount because of unsupported " 2087 "optional features (%x).\n", i); 2088 status = -EINVAL; 2089 goto out_orphan_wipes; 2090 } 2091 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2092 mlog(ML_ERROR, "couldn't mount RDWR because of " 2093 "unsupported optional features (%x).\n", i); 2094 status = -EINVAL; 2095 goto out_orphan_wipes; 2096 } 2097 2098 if (ocfs2_clusterinfo_valid(osb)) { 2099 /* 2100 * ci_stack and ci_cluster in ocfs2_cluster_info may not be null 2101 * terminated, so make sure no overflow happens here by using 2102 * memcpy. Destination strings will always be null terminated 2103 * because osb is allocated using kzalloc. 2104 */ 2105 osb->osb_stackflags = 2106 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2107 memcpy(osb->osb_cluster_stack, 2108 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2109 OCFS2_STACK_LABEL_LEN); 2110 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2111 mlog(ML_ERROR, 2112 "couldn't mount because of an invalid " 2113 "cluster stack label (%s) \n", 2114 osb->osb_cluster_stack); 2115 status = -EINVAL; 2116 goto out_orphan_wipes; 2117 } 2118 memcpy(osb->osb_cluster_name, 2119 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2120 OCFS2_CLUSTER_NAME_LEN); 2121 } else { 2122 /* The empty string is identical with classic tools that 2123 * don't know about s_cluster_info. */ 2124 osb->osb_cluster_stack[0] = '\0'; 2125 } 2126 2127 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2128 2129 /* 2130 * FIXME 2131 * This should be done in ocfs2_journal_init(), but any inode 2132 * writes back operation will cause the filesystem to crash. 2133 */ 2134 status = ocfs2_journal_alloc(osb); 2135 if (status < 0) 2136 goto out_orphan_wipes; 2137 2138 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2139 init_llist_head(&osb->dquot_drop_list); 2140 2141 /* get some pseudo constants for clustersize bits */ 2142 osb->s_clustersize_bits = 2143 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2144 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2145 2146 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2147 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2148 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2149 osb->s_clustersize); 2150 status = -EINVAL; 2151 goto out_journal; 2152 } 2153 2154 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2155 le32_to_cpu(di->i_clusters)); 2156 2157 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2158 total_blocks); 2159 if (status) { 2160 mlog(ML_ERROR, "Volume too large " 2161 "to mount safely on this system"); 2162 status = -EFBIG; 2163 goto out_journal; 2164 } 2165 2166 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2167 sizeof(di->id2.i_super.s_uuid))) { 2168 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2169 status = -ENOMEM; 2170 goto out_journal; 2171 } 2172 2173 strscpy(osb->vol_label, di->id2.i_super.s_label, 2174 OCFS2_MAX_VOL_LABEL_LEN); 2175 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2176 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2177 osb->first_cluster_group_blkno = 2178 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2179 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2180 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2181 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2182 (unsigned long long)osb->root_blkno, 2183 (unsigned long long)osb->system_dir_blkno, 2184 osb->s_clustersize_bits); 2185 2186 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2187 if (!osb->osb_dlm_debug) { 2188 status = -ENOMEM; 2189 mlog_errno(status); 2190 goto out_uuid_str; 2191 } 2192 2193 atomic_set(&osb->vol_state, VOLUME_INIT); 2194 2195 /* load root, system_dir, and all global system inodes */ 2196 status = ocfs2_init_global_system_inodes(osb); 2197 if (status < 0) { 2198 mlog_errno(status); 2199 goto out_dlm_out; 2200 } 2201 2202 /* 2203 * global bitmap 2204 */ 2205 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2206 OCFS2_INVALID_SLOT); 2207 if (!inode) { 2208 status = -EINVAL; 2209 mlog_errno(status); 2210 goto out_system_inodes; 2211 } 2212 2213 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2214 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2215 iput(inode); 2216 2217 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2218 osb->s_feature_incompat) * 8; 2219 2220 status = ocfs2_init_slot_info(osb); 2221 if (status < 0) { 2222 mlog_errno(status); 2223 goto out_system_inodes; 2224 } 2225 2226 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2227 if (!osb->ocfs2_wq) { 2228 status = -ENOMEM; 2229 mlog_errno(status); 2230 goto out_slot_info; 2231 } 2232 2233 return status; 2234 2235out_slot_info: 2236 ocfs2_free_slot_info(osb); 2237out_system_inodes: 2238 ocfs2_release_system_inodes(osb); 2239out_dlm_out: 2240 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2241out_uuid_str: 2242 kfree(osb->uuid_str); 2243out_journal: 2244 kfree(osb->journal); 2245out_orphan_wipes: 2246 kfree(osb->osb_orphan_wipes); 2247out_slot_recovery_gen: 2248 kfree(osb->slot_recovery_generations); 2249out_vol_label: 2250 kfree(osb->vol_label); 2251out_recovery_map: 2252 kfree(osb->recovery_map); 2253out: 2254 kfree(osb); 2255 sb->s_fs_info = NULL; 2256 return status; 2257} 2258 2259/* 2260 * will return: -EAGAIN if it is ok to keep searching for superblocks 2261 * -EINVAL if there is a bad superblock 2262 * 0 on success 2263 */ 2264static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2265 struct buffer_head *bh, 2266 u32 blksz, 2267 struct ocfs2_blockcheck_stats *stats) 2268{ 2269 int status = -EAGAIN; 2270 u32 blksz_bits; 2271 2272 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2273 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2274 /* We have to do a raw check of the feature here */ 2275 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2276 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2277 status = ocfs2_block_check_validate(bh->b_data, 2278 bh->b_size, 2279 &di->i_check, 2280 stats); 2281 if (status) 2282 goto out; 2283 } 2284 status = -EINVAL; 2285 /* Acceptable block sizes are 512 bytes, 1K, 2K and 4K. */ 2286 blksz_bits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2287 if (blksz_bits < 9 || blksz_bits > 12) { 2288 mlog(ML_ERROR, "found superblock with incorrect block " 2289 "size bits: found %u, should be 9, 10, 11, or 12\n", 2290 blksz_bits); 2291 } else if ((1 << blksz_bits) != blksz) { 2292 mlog(ML_ERROR, "found superblock with incorrect block " 2293 "size: found %u, should be %u\n", 1 << blksz_bits, blksz); 2294 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2295 OCFS2_MAJOR_REV_LEVEL || 2296 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2297 OCFS2_MINOR_REV_LEVEL) { 2298 mlog(ML_ERROR, "found superblock with bad version: " 2299 "found %u.%u, should be %u.%u\n", 2300 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2301 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2302 OCFS2_MAJOR_REV_LEVEL, 2303 OCFS2_MINOR_REV_LEVEL); 2304 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2305 mlog(ML_ERROR, "bad block number on superblock: " 2306 "found %llu, should be %llu\n", 2307 (unsigned long long)le64_to_cpu(di->i_blkno), 2308 (unsigned long long)bh->b_blocknr); 2309 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2310 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2311 mlog(ML_ERROR, "bad cluster size bit found: %u\n", 2312 le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2313 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2314 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2315 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2316 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2317 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2318 mlog(ML_ERROR, 2319 "Superblock slots found greater than file system " 2320 "maximum: found %u, max %u\n", 2321 le16_to_cpu(di->id2.i_super.s_max_slots), 2322 OCFS2_MAX_SLOTS); 2323 } else { 2324 /* found it! */ 2325 status = 0; 2326 } 2327 } 2328 2329out: 2330 if (status && status != -EAGAIN) 2331 mlog_errno(status); 2332 return status; 2333} 2334 2335static int ocfs2_check_volume(struct ocfs2_super *osb) 2336{ 2337 int status; 2338 int dirty; 2339 int local; 2340 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2341 * recover 2342 * ourselves. */ 2343 2344 /* Init our journal object. */ 2345 status = ocfs2_journal_init(osb, &dirty); 2346 if (status < 0) { 2347 mlog(ML_ERROR, "Could not initialize journal!\n"); 2348 goto finally; 2349 } 2350 2351 /* Now that journal has been initialized, check to make sure 2352 entire volume is addressable. */ 2353 status = ocfs2_journal_addressable(osb); 2354 if (status) 2355 goto finally; 2356 2357 /* If the journal was unmounted cleanly then we don't want to 2358 * recover anything. Otherwise, journal_load will do that 2359 * dirty work for us :) */ 2360 if (!dirty) { 2361 status = ocfs2_journal_wipe(osb->journal, 0); 2362 if (status < 0) { 2363 mlog_errno(status); 2364 goto finally; 2365 } 2366 } else { 2367 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2368 "unmounted cleanly, recovering it.\n", osb->dev_str); 2369 } 2370 2371 local = ocfs2_mount_local(osb); 2372 2373 /* will play back anything left in the journal. */ 2374 status = ocfs2_journal_load(osb->journal, local, dirty); 2375 if (status < 0) { 2376 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2377 goto finally; 2378 } 2379 2380 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2381 jbd2_journal_set_features(osb->journal->j_journal, 2382 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2383 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2384 else 2385 jbd2_journal_clear_features(osb->journal->j_journal, 2386 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2387 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2388 2389 if (dirty) { 2390 /* recover my local alloc if we didn't unmount cleanly. */ 2391 status = ocfs2_begin_local_alloc_recovery(osb, 2392 osb->slot_num, 2393 &local_alloc); 2394 if (status < 0) { 2395 mlog_errno(status); 2396 goto finally; 2397 } 2398 /* we complete the recovery process after we've marked 2399 * ourselves as mounted. */ 2400 } 2401 2402 status = ocfs2_load_local_alloc(osb); 2403 if (status < 0) { 2404 mlog_errno(status); 2405 goto finally; 2406 } 2407 2408 if (dirty) { 2409 /* Recovery will be completed after we've mounted the 2410 * rest of the volume. */ 2411 osb->local_alloc_copy = local_alloc; 2412 local_alloc = NULL; 2413 } 2414 2415 /* go through each journal, trylock it and if you get the 2416 * lock, and it's marked as dirty, set the bit in the recover 2417 * map and launch a recovery thread for it. */ 2418 status = ocfs2_mark_dead_nodes(osb); 2419 if (status < 0) { 2420 mlog_errno(status); 2421 goto finally; 2422 } 2423 2424 status = ocfs2_compute_replay_slots(osb); 2425 if (status < 0) 2426 mlog_errno(status); 2427 2428finally: 2429 kfree(local_alloc); 2430 2431 if (status) 2432 mlog_errno(status); 2433 return status; 2434} 2435 2436/* 2437 * The routine gets called from dismount or close whenever a dismount on 2438 * volume is requested and the osb open count becomes 1. 2439 * It will remove the osb from the global list and also free up all the 2440 * initialized resources and fileobject. 2441 */ 2442static void ocfs2_delete_osb(struct ocfs2_super *osb) 2443{ 2444 /* This function assumes that the caller has the main osb resource */ 2445 2446 /* ocfs2_initializer_super have already created this workqueue */ 2447 if (osb->ocfs2_wq) 2448 destroy_workqueue(osb->ocfs2_wq); 2449 2450 ocfs2_free_slot_info(osb); 2451 2452 kfree(osb->osb_orphan_wipes); 2453 kfree(osb->slot_recovery_generations); 2454 /* FIXME 2455 * This belongs in journal shutdown, but because we have to 2456 * allocate osb->journal at the middle of ocfs2_initialize_super(), 2457 * we free it here. 2458 */ 2459 kfree(osb->journal); 2460 kfree(osb->local_alloc_copy); 2461 kfree(osb->uuid_str); 2462 kfree(osb->vol_label); 2463 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2464 memset(osb, 0, sizeof(struct ocfs2_super)); 2465} 2466 2467/* Depending on the mount option passed, perform one of the following: 2468 * Put OCFS2 into a readonly state (default) 2469 * Return EIO so that only the process errs 2470 * Fix the error as if fsck.ocfs2 -y 2471 * panic 2472 */ 2473static int ocfs2_handle_error(struct super_block *sb) 2474{ 2475 struct ocfs2_super *osb = OCFS2_SB(sb); 2476 int rv = 0; 2477 2478 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2479 pr_crit("On-disk corruption discovered. " 2480 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2481 2482 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2483 panic("OCFS2: (device %s): panic forced after error\n", 2484 sb->s_id); 2485 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2486 pr_crit("OCFS2: Returning error to the calling process.\n"); 2487 rv = -EIO; 2488 } else { /* default option */ 2489 rv = -EROFS; 2490 if (sb_rdonly(sb) && ocfs2_emergency_state(osb)) 2491 return rv; 2492 2493 pr_crit("OCFS2: File system is now read-only.\n"); 2494 sb->s_flags |= SB_RDONLY; 2495 ocfs2_set_ro_flag(osb, 0); 2496 } 2497 2498 return rv; 2499} 2500 2501int __ocfs2_error(struct super_block *sb, const char *function, 2502 const char *fmt, ...) 2503{ 2504 struct va_format vaf; 2505 va_list args; 2506 2507 va_start(args, fmt); 2508 vaf.fmt = fmt; 2509 vaf.va = &args; 2510 2511 /* Not using mlog here because we want to show the actual 2512 * function the error came from. */ 2513 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2514 sb->s_id, function, &vaf); 2515 2516 va_end(args); 2517 2518 return ocfs2_handle_error(sb); 2519} 2520 2521/* Handle critical errors. This is intentionally more drastic than 2522 * ocfs2_handle_error, so we only use for things like journal errors, 2523 * etc. */ 2524void __ocfs2_abort(struct super_block *sb, const char *function, 2525 const char *fmt, ...) 2526{ 2527 struct va_format vaf; 2528 va_list args; 2529 2530 va_start(args, fmt); 2531 2532 vaf.fmt = fmt; 2533 vaf.va = &args; 2534 2535 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2536 sb->s_id, function, &vaf); 2537 2538 va_end(args); 2539 2540 /* We don't have the cluster support yet to go straight to 2541 * hard readonly in here. Until then, we want to keep 2542 * ocfs2_abort() so that we can at least mark critical 2543 * errors. 2544 * 2545 * TODO: This should abort the journal and alert other nodes 2546 * that our slot needs recovery. */ 2547 2548 /* Force a panic(). This stinks, but it's better than letting 2549 * things continue without having a proper hard readonly 2550 * here. */ 2551 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2552 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2553 ocfs2_handle_error(sb); 2554} 2555 2556/* 2557 * Void signal blockers, because in-kernel sigprocmask() only fails 2558 * when SIG_* is wrong. 2559 */ 2560void ocfs2_block_signals(sigset_t *oldset) 2561{ 2562 int rc; 2563 sigset_t blocked; 2564 2565 sigfillset(&blocked); 2566 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2567 BUG_ON(rc); 2568} 2569 2570void ocfs2_unblock_signals(sigset_t *oldset) 2571{ 2572 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2573 BUG_ON(rc); 2574} 2575 2576module_init(ocfs2_init); 2577module_exit(ocfs2_exit);
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