1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/init.h> 32 #include <linux/random.h> 33 #include <linux/statfs.h> 34 #include <linux/moduleparam.h> 35 #include <linux/blkdev.h> 36 #include <linux/socket.h> 37 #include <linux/inet.h> 38 #include <linux/parser.h> 39 #include <linux/crc32.h> 40 #include <linux/debugfs.h> 41 #include <linux/mount.h> 42 #include <linux/seq_file.h> 43 #include <linux/quotaops.h> 44 #include <linux/cleancache.h> 45 #include <linux/signal.h> 46 47 #define CREATE_TRACE_POINTS 48 #include "ocfs2_trace.h" 49 50 #include <cluster/masklog.h> 51 52 #include "ocfs2.h" 53 54 /* this should be the only file to include a version 1 header */ 55 #include "ocfs1_fs_compat.h" 56 57 #include "alloc.h" 58 #include "aops.h" 59 #include "blockcheck.h" 60 #include "dlmglue.h" 61 #include "export.h" 62 #include "extent_map.h" 63 #include "heartbeat.h" 64 #include "inode.h" 65 #include "journal.h" 66 #include "localalloc.h" 67 #include "namei.h" 68 #include "slot_map.h" 69 #include "super.h" 70 #include "sysfile.h" 71 #include "uptodate.h" 72 #include "xattr.h" 73 #include "quota.h" 74 #include "refcounttree.h" 75 #include "suballoc.h" 76 77 #include "buffer_head_io.h" 78 #include "filecheck.h" 79 80 static struct kmem_cache *ocfs2_inode_cachep; 81 struct kmem_cache *ocfs2_dquot_cachep; 82 struct kmem_cache *ocfs2_qf_chunk_cachep; 83 84 static struct dentry *ocfs2_debugfs_root; 85 86 MODULE_AUTHOR("Oracle"); 87 MODULE_LICENSE("GPL"); 88 MODULE_DESCRIPTION("OCFS2 cluster file system"); 89 90 struct mount_options 91 { 92 unsigned long commit_interval; 93 unsigned long mount_opt; 94 unsigned int atime_quantum; 95 signed short slot; 96 int localalloc_opt; 97 unsigned int resv_level; 98 int dir_resv_level; 99 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 100 }; 101 102 static int ocfs2_parse_options(struct super_block *sb, char *options, 103 struct mount_options *mopt, 104 int is_remount); 105 static int ocfs2_check_set_options(struct super_block *sb, 106 struct mount_options *options); 107 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 108 static void ocfs2_put_super(struct super_block *sb); 109 static int ocfs2_mount_volume(struct super_block *sb); 110 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 111 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 112 static int ocfs2_initialize_mem_caches(void); 113 static void ocfs2_free_mem_caches(void); 114 static void ocfs2_delete_osb(struct ocfs2_super *osb); 115 116 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 117 118 static int ocfs2_sync_fs(struct super_block *sb, int wait); 119 120 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 121 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 122 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 123 static int ocfs2_check_volume(struct ocfs2_super *osb); 124 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 125 struct buffer_head *bh, 126 u32 sectsize, 127 struct ocfs2_blockcheck_stats *stats); 128 static int ocfs2_initialize_super(struct super_block *sb, 129 struct buffer_head *bh, 130 int sector_size, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_get_sector(struct super_block *sb, 133 struct buffer_head **bh, 134 int block, 135 int sect_size); 136 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 137 static void ocfs2_destroy_inode(struct inode *inode); 138 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 139 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 140 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 141 142 static struct dquot **ocfs2_get_dquots(struct inode *inode) 143 { 144 return OCFS2_I(inode)->i_dquot; 145 } 146 147 static const struct super_operations ocfs2_sops = { 148 .statfs = ocfs2_statfs, 149 .alloc_inode = ocfs2_alloc_inode, 150 .destroy_inode = ocfs2_destroy_inode, 151 .drop_inode = ocfs2_drop_inode, 152 .evict_inode = ocfs2_evict_inode, 153 .sync_fs = ocfs2_sync_fs, 154 .put_super = ocfs2_put_super, 155 .remount_fs = ocfs2_remount, 156 .show_options = ocfs2_show_options, 157 .quota_read = ocfs2_quota_read, 158 .quota_write = ocfs2_quota_write, 159 .get_dquots = ocfs2_get_dquots, 160 }; 161 162 enum { 163 Opt_barrier, 164 Opt_err_panic, 165 Opt_err_ro, 166 Opt_intr, 167 Opt_nointr, 168 Opt_hb_none, 169 Opt_hb_local, 170 Opt_hb_global, 171 Opt_data_ordered, 172 Opt_data_writeback, 173 Opt_atime_quantum, 174 Opt_slot, 175 Opt_commit, 176 Opt_localalloc, 177 Opt_localflocks, 178 Opt_stack, 179 Opt_user_xattr, 180 Opt_nouser_xattr, 181 Opt_inode64, 182 Opt_acl, 183 Opt_noacl, 184 Opt_usrquota, 185 Opt_grpquota, 186 Opt_coherency_buffered, 187 Opt_coherency_full, 188 Opt_resv_level, 189 Opt_dir_resv_level, 190 Opt_journal_async_commit, 191 Opt_err_cont, 192 Opt_err, 193 }; 194 195 static const match_table_t tokens = { 196 {Opt_barrier, "barrier=%u"}, 197 {Opt_err_panic, "errors=panic"}, 198 {Opt_err_ro, "errors=remount-ro"}, 199 {Opt_intr, "intr"}, 200 {Opt_nointr, "nointr"}, 201 {Opt_hb_none, OCFS2_HB_NONE}, 202 {Opt_hb_local, OCFS2_HB_LOCAL}, 203 {Opt_hb_global, OCFS2_HB_GLOBAL}, 204 {Opt_data_ordered, "data=ordered"}, 205 {Opt_data_writeback, "data=writeback"}, 206 {Opt_atime_quantum, "atime_quantum=%u"}, 207 {Opt_slot, "preferred_slot=%u"}, 208 {Opt_commit, "commit=%u"}, 209 {Opt_localalloc, "localalloc=%d"}, 210 {Opt_localflocks, "localflocks"}, 211 {Opt_stack, "cluster_stack=%s"}, 212 {Opt_user_xattr, "user_xattr"}, 213 {Opt_nouser_xattr, "nouser_xattr"}, 214 {Opt_inode64, "inode64"}, 215 {Opt_acl, "acl"}, 216 {Opt_noacl, "noacl"}, 217 {Opt_usrquota, "usrquota"}, 218 {Opt_grpquota, "grpquota"}, 219 {Opt_coherency_buffered, "coherency=buffered"}, 220 {Opt_coherency_full, "coherency=full"}, 221 {Opt_resv_level, "resv_level=%u"}, 222 {Opt_dir_resv_level, "dir_resv_level=%u"}, 223 {Opt_journal_async_commit, "journal_async_commit"}, 224 {Opt_err_cont, "errors=continue"}, 225 {Opt_err, NULL} 226 }; 227 228 #ifdef CONFIG_DEBUG_FS 229 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 230 { 231 struct ocfs2_cluster_connection *cconn = osb->cconn; 232 struct ocfs2_recovery_map *rm = osb->recovery_map; 233 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 234 int i, out = 0; 235 unsigned long flags; 236 237 out += snprintf(buf + out, len - out, 238 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 239 "Device", osb->dev_str, osb->uuid_str, 240 osb->fs_generation, osb->vol_label); 241 242 out += snprintf(buf + out, len - out, 243 "%10s => State: %d Flags: 0x%lX\n", "Volume", 244 atomic_read(&osb->vol_state), osb->osb_flags); 245 246 out += snprintf(buf + out, len - out, 247 "%10s => Block: %lu Cluster: %d\n", "Sizes", 248 osb->sb->s_blocksize, osb->s_clustersize); 249 250 out += snprintf(buf + out, len - out, 251 "%10s => Compat: 0x%X Incompat: 0x%X " 252 "ROcompat: 0x%X\n", 253 "Features", osb->s_feature_compat, 254 osb->s_feature_incompat, osb->s_feature_ro_compat); 255 256 out += snprintf(buf + out, len - out, 257 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 258 osb->s_mount_opt, osb->s_atime_quantum); 259 260 if (cconn) { 261 out += snprintf(buf + out, len - out, 262 "%10s => Stack: %s Name: %*s " 263 "Version: %d.%d\n", "Cluster", 264 (*osb->osb_cluster_stack == '\0' ? 265 "o2cb" : osb->osb_cluster_stack), 266 cconn->cc_namelen, cconn->cc_name, 267 cconn->cc_version.pv_major, 268 cconn->cc_version.pv_minor); 269 } 270 271 spin_lock_irqsave(&osb->dc_task_lock, flags); 272 out += snprintf(buf + out, len - out, 273 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 274 "WorkSeq: %lu\n", "DownCnvt", 275 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 276 osb->blocked_lock_count, osb->dc_wake_sequence, 277 osb->dc_work_sequence); 278 spin_unlock_irqrestore(&osb->dc_task_lock, flags); 279 280 spin_lock(&osb->osb_lock); 281 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 282 "Recovery", 283 (osb->recovery_thread_task ? 284 task_pid_nr(osb->recovery_thread_task) : -1)); 285 if (rm->rm_used == 0) 286 out += snprintf(buf + out, len - out, " None\n"); 287 else { 288 for (i = 0; i < rm->rm_used; i++) 289 out += snprintf(buf + out, len - out, " %d", 290 rm->rm_entries[i]); 291 out += snprintf(buf + out, len - out, "\n"); 292 } 293 spin_unlock(&osb->osb_lock); 294 295 out += snprintf(buf + out, len - out, 296 "%10s => Pid: %d Interval: %lu\n", "Commit", 297 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 298 osb->osb_commit_interval); 299 300 out += snprintf(buf + out, len - out, 301 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 302 "Journal", osb->journal->j_state, 303 osb->journal->j_trans_id, 304 atomic_read(&osb->journal->j_num_trans)); 305 306 out += snprintf(buf + out, len - out, 307 "%10s => GlobalAllocs: %d LocalAllocs: %d " 308 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 309 "Stats", 310 atomic_read(&osb->alloc_stats.bitmap_data), 311 atomic_read(&osb->alloc_stats.local_data), 312 atomic_read(&osb->alloc_stats.bg_allocs), 313 atomic_read(&osb->alloc_stats.moves), 314 atomic_read(&osb->alloc_stats.bg_extends)); 315 316 out += snprintf(buf + out, len - out, 317 "%10s => State: %u Descriptor: %llu Size: %u bits " 318 "Default: %u bits\n", 319 "LocalAlloc", osb->local_alloc_state, 320 (unsigned long long)osb->la_last_gd, 321 osb->local_alloc_bits, osb->local_alloc_default_bits); 322 323 spin_lock(&osb->osb_lock); 324 out += snprintf(buf + out, len - out, 325 "%10s => InodeSlot: %d StolenInodes: %d, " 326 "MetaSlot: %d StolenMeta: %d\n", "Steal", 327 osb->s_inode_steal_slot, 328 atomic_read(&osb->s_num_inodes_stolen), 329 osb->s_meta_steal_slot, 330 atomic_read(&osb->s_num_meta_stolen)); 331 spin_unlock(&osb->osb_lock); 332 333 out += snprintf(buf + out, len - out, "OrphanScan => "); 334 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 335 os->os_count, os->os_seqno); 336 out += snprintf(buf + out, len - out, " Last Scan: "); 337 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 338 out += snprintf(buf + out, len - out, "Disabled\n"); 339 else 340 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 341 (unsigned long)(ktime_get_seconds() - os->os_scantime)); 342 343 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 344 "Slots", "Num", "RecoGen"); 345 for (i = 0; i < osb->max_slots; ++i) { 346 out += snprintf(buf + out, len - out, 347 "%10s %c %3d %10d\n", 348 " ", 349 (i == osb->slot_num ? '*' : ' '), 350 i, osb->slot_recovery_generations[i]); 351 } 352 353 return out; 354 } 355 356 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 357 { 358 struct ocfs2_super *osb = inode->i_private; 359 char *buf = NULL; 360 361 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 362 if (!buf) 363 goto bail; 364 365 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 366 367 file->private_data = buf; 368 369 return 0; 370 bail: 371 return -ENOMEM; 372 } 373 374 static int ocfs2_debug_release(struct inode *inode, struct file *file) 375 { 376 kfree(file->private_data); 377 return 0; 378 } 379 380 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 381 size_t nbytes, loff_t *ppos) 382 { 383 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 384 i_size_read(file->f_mapping->host)); 385 } 386 #else 387 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 388 { 389 return 0; 390 } 391 static int ocfs2_debug_release(struct inode *inode, struct file *file) 392 { 393 return 0; 394 } 395 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 396 size_t nbytes, loff_t *ppos) 397 { 398 return 0; 399 } 400 #endif /* CONFIG_DEBUG_FS */ 401 402 static const struct file_operations ocfs2_osb_debug_fops = { 403 .open = ocfs2_osb_debug_open, 404 .release = ocfs2_debug_release, 405 .read = ocfs2_debug_read, 406 .llseek = generic_file_llseek, 407 }; 408 409 static int ocfs2_sync_fs(struct super_block *sb, int wait) 410 { 411 int status; 412 tid_t target; 413 struct ocfs2_super *osb = OCFS2_SB(sb); 414 415 if (ocfs2_is_hard_readonly(osb)) 416 return -EROFS; 417 418 if (wait) { 419 status = ocfs2_flush_truncate_log(osb); 420 if (status < 0) 421 mlog_errno(status); 422 } else { 423 ocfs2_schedule_truncate_log_flush(osb, 0); 424 } 425 426 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 427 &target)) { 428 if (wait) 429 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 430 target); 431 } 432 return 0; 433 } 434 435 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 436 { 437 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 438 && (ino == USER_QUOTA_SYSTEM_INODE 439 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 440 return 0; 441 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 442 && (ino == GROUP_QUOTA_SYSTEM_INODE 443 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 444 return 0; 445 return 1; 446 } 447 448 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 449 { 450 struct inode *new = NULL; 451 int status = 0; 452 int i; 453 454 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 455 if (IS_ERR(new)) { 456 status = PTR_ERR(new); 457 mlog_errno(status); 458 goto bail; 459 } 460 osb->root_inode = new; 461 462 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 463 if (IS_ERR(new)) { 464 status = PTR_ERR(new); 465 mlog_errno(status); 466 goto bail; 467 } 468 osb->sys_root_inode = new; 469 470 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 471 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 472 if (!ocfs2_need_system_inode(osb, i)) 473 continue; 474 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 475 if (!new) { 476 ocfs2_release_system_inodes(osb); 477 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 478 mlog_errno(status); 479 mlog(ML_ERROR, "Unable to load system inode %d, " 480 "possibly corrupt fs?", i); 481 goto bail; 482 } 483 // the array now has one ref, so drop this one 484 iput(new); 485 } 486 487 bail: 488 if (status) 489 mlog_errno(status); 490 return status; 491 } 492 493 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 494 { 495 struct inode *new = NULL; 496 int status = 0; 497 int i; 498 499 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 500 i < NUM_SYSTEM_INODES; 501 i++) { 502 if (!ocfs2_need_system_inode(osb, i)) 503 continue; 504 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 505 if (!new) { 506 ocfs2_release_system_inodes(osb); 507 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 508 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 509 status, i, osb->slot_num); 510 goto bail; 511 } 512 /* the array now has one ref, so drop this one */ 513 iput(new); 514 } 515 516 bail: 517 if (status) 518 mlog_errno(status); 519 return status; 520 } 521 522 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 523 { 524 int i; 525 struct inode *inode; 526 527 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 528 inode = osb->global_system_inodes[i]; 529 if (inode) { 530 iput(inode); 531 osb->global_system_inodes[i] = NULL; 532 } 533 } 534 535 inode = osb->sys_root_inode; 536 if (inode) { 537 iput(inode); 538 osb->sys_root_inode = NULL; 539 } 540 541 inode = osb->root_inode; 542 if (inode) { 543 iput(inode); 544 osb->root_inode = NULL; 545 } 546 547 if (!osb->local_system_inodes) 548 return; 549 550 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 551 if (osb->local_system_inodes[i]) { 552 iput(osb->local_system_inodes[i]); 553 osb->local_system_inodes[i] = NULL; 554 } 555 } 556 557 kfree(osb->local_system_inodes); 558 osb->local_system_inodes = NULL; 559 } 560 561 /* We're allocating fs objects, use GFP_NOFS */ 562 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 563 { 564 struct ocfs2_inode_info *oi; 565 566 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 567 if (!oi) 568 return NULL; 569 570 oi->i_sync_tid = 0; 571 oi->i_datasync_tid = 0; 572 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 573 574 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 575 return &oi->vfs_inode; 576 } 577 578 static void ocfs2_i_callback(struct rcu_head *head) 579 { 580 struct inode *inode = container_of(head, struct inode, i_rcu); 581 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 582 } 583 584 static void ocfs2_destroy_inode(struct inode *inode) 585 { 586 call_rcu(&inode->i_rcu, ocfs2_i_callback); 587 } 588 589 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 590 unsigned int cbits) 591 { 592 unsigned int bytes = 1 << cbits; 593 unsigned int trim = bytes; 594 unsigned int bitshift = 32; 595 596 /* 597 * i_size and all block offsets in ocfs2 are always 64 bits 598 * wide. i_clusters is 32 bits, in cluster-sized units. So on 599 * 64 bit platforms, cluster size will be the limiting factor. 600 */ 601 602 #if BITS_PER_LONG == 32 603 # if defined(CONFIG_LBDAF) 604 BUILD_BUG_ON(sizeof(sector_t) != 8); 605 /* 606 * We might be limited by page cache size. 607 */ 608 if (bytes > PAGE_SIZE) { 609 bytes = PAGE_SIZE; 610 trim = 1; 611 /* 612 * Shift by 31 here so that we don't get larger than 613 * MAX_LFS_FILESIZE 614 */ 615 bitshift = 31; 616 } 617 # else 618 /* 619 * We are limited by the size of sector_t. Use block size, as 620 * that's what we expose to the VFS. 621 */ 622 bytes = 1 << bbits; 623 trim = 1; 624 bitshift = 31; 625 # endif 626 #endif 627 628 /* 629 * Trim by a whole cluster when we can actually approach the 630 * on-disk limits. Otherwise we can overflow i_clusters when 631 * an extent start is at the max offset. 632 */ 633 return (((unsigned long long)bytes) << bitshift) - trim; 634 } 635 636 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 637 { 638 int incompat_features; 639 int ret = 0; 640 struct mount_options parsed_options; 641 struct ocfs2_super *osb = OCFS2_SB(sb); 642 u32 tmp; 643 644 sync_filesystem(sb); 645 646 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 647 !ocfs2_check_set_options(sb, &parsed_options)) { 648 ret = -EINVAL; 649 goto out; 650 } 651 652 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 653 OCFS2_MOUNT_HB_NONE; 654 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 655 ret = -EINVAL; 656 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 657 goto out; 658 } 659 660 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 661 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 662 ret = -EINVAL; 663 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 664 goto out; 665 } 666 667 /* Probably don't want this on remount; it might 668 * mess with other nodes */ 669 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 670 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 671 ret = -EINVAL; 672 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 673 goto out; 674 } 675 676 /* We're going to/from readonly mode. */ 677 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 678 /* Disable quota accounting before remounting RO */ 679 if (*flags & SB_RDONLY) { 680 ret = ocfs2_susp_quotas(osb, 0); 681 if (ret < 0) 682 goto out; 683 } 684 /* Lock here so the check of HARD_RO and the potential 685 * setting of SOFT_RO is atomic. */ 686 spin_lock(&osb->osb_lock); 687 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 688 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 689 ret = -EROFS; 690 goto unlock_osb; 691 } 692 693 if (*flags & SB_RDONLY) { 694 sb->s_flags |= SB_RDONLY; 695 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 696 } else { 697 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 698 mlog(ML_ERROR, "Cannot remount RDWR " 699 "filesystem due to previous errors.\n"); 700 ret = -EROFS; 701 goto unlock_osb; 702 } 703 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 704 if (incompat_features) { 705 mlog(ML_ERROR, "Cannot remount RDWR because " 706 "of unsupported optional features " 707 "(%x).\n", incompat_features); 708 ret = -EINVAL; 709 goto unlock_osb; 710 } 711 sb->s_flags &= ~SB_RDONLY; 712 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 713 } 714 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 715 unlock_osb: 716 spin_unlock(&osb->osb_lock); 717 /* Enable quota accounting after remounting RW */ 718 if (!ret && !(*flags & SB_RDONLY)) { 719 if (sb_any_quota_suspended(sb)) 720 ret = ocfs2_susp_quotas(osb, 1); 721 else 722 ret = ocfs2_enable_quotas(osb); 723 if (ret < 0) { 724 /* Return back changes... */ 725 spin_lock(&osb->osb_lock); 726 sb->s_flags |= SB_RDONLY; 727 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 728 spin_unlock(&osb->osb_lock); 729 goto out; 730 } 731 } 732 } 733 734 if (!ret) { 735 /* Only save off the new mount options in case of a successful 736 * remount. */ 737 osb->s_mount_opt = parsed_options.mount_opt; 738 osb->s_atime_quantum = parsed_options.atime_quantum; 739 osb->preferred_slot = parsed_options.slot; 740 if (parsed_options.commit_interval) 741 osb->osb_commit_interval = parsed_options.commit_interval; 742 743 if (!ocfs2_is_hard_readonly(osb)) 744 ocfs2_set_journal_params(osb); 745 746 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 747 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 748 SB_POSIXACL : 0); 749 } 750 out: 751 return ret; 752 } 753 754 static int ocfs2_sb_probe(struct super_block *sb, 755 struct buffer_head **bh, 756 int *sector_size, 757 struct ocfs2_blockcheck_stats *stats) 758 { 759 int status, tmpstat; 760 struct ocfs1_vol_disk_hdr *hdr; 761 struct ocfs2_dinode *di; 762 int blksize; 763 764 *bh = NULL; 765 766 /* may be > 512 */ 767 *sector_size = bdev_logical_block_size(sb->s_bdev); 768 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 769 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 770 *sector_size, OCFS2_MAX_BLOCKSIZE); 771 status = -EINVAL; 772 goto bail; 773 } 774 775 /* Can this really happen? */ 776 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 777 *sector_size = OCFS2_MIN_BLOCKSIZE; 778 779 /* check block zero for old format */ 780 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 781 if (status < 0) { 782 mlog_errno(status); 783 goto bail; 784 } 785 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 786 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 787 mlog(ML_ERROR, "incompatible version: %u.%u\n", 788 hdr->major_version, hdr->minor_version); 789 status = -EINVAL; 790 } 791 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 792 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 793 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 794 hdr->signature); 795 status = -EINVAL; 796 } 797 brelse(*bh); 798 *bh = NULL; 799 if (status < 0) { 800 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 801 "upgraded before mounting with ocfs v2\n"); 802 goto bail; 803 } 804 805 /* 806 * Now check at magic offset for 512, 1024, 2048, 4096 807 * blocksizes. 4096 is the maximum blocksize because it is 808 * the minimum clustersize. 809 */ 810 status = -EINVAL; 811 for (blksize = *sector_size; 812 blksize <= OCFS2_MAX_BLOCKSIZE; 813 blksize <<= 1) { 814 tmpstat = ocfs2_get_sector(sb, bh, 815 OCFS2_SUPER_BLOCK_BLKNO, 816 blksize); 817 if (tmpstat < 0) { 818 status = tmpstat; 819 mlog_errno(status); 820 break; 821 } 822 di = (struct ocfs2_dinode *) (*bh)->b_data; 823 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 824 spin_lock_init(&stats->b_lock); 825 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 826 if (tmpstat < 0) { 827 brelse(*bh); 828 *bh = NULL; 829 } 830 if (tmpstat != -EAGAIN) { 831 status = tmpstat; 832 break; 833 } 834 } 835 836 bail: 837 return status; 838 } 839 840 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 841 { 842 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 843 844 if (osb->s_mount_opt & hb_enabled) { 845 if (ocfs2_mount_local(osb)) { 846 mlog(ML_ERROR, "Cannot heartbeat on a locally " 847 "mounted device.\n"); 848 return -EINVAL; 849 } 850 if (ocfs2_userspace_stack(osb)) { 851 mlog(ML_ERROR, "Userspace stack expected, but " 852 "o2cb heartbeat arguments passed to mount\n"); 853 return -EINVAL; 854 } 855 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 856 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 857 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 858 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 859 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 860 return -EINVAL; 861 } 862 } 863 864 if (!(osb->s_mount_opt & hb_enabled)) { 865 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 866 !ocfs2_userspace_stack(osb)) { 867 mlog(ML_ERROR, "Heartbeat has to be started to mount " 868 "a read-write clustered device.\n"); 869 return -EINVAL; 870 } 871 } 872 873 return 0; 874 } 875 876 /* 877 * If we're using a userspace stack, mount should have passed 878 * a name that matches the disk. If not, mount should not 879 * have passed a stack. 880 */ 881 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 882 struct mount_options *mopt) 883 { 884 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 885 mlog(ML_ERROR, 886 "cluster stack passed to mount, but this filesystem " 887 "does not support it\n"); 888 return -EINVAL; 889 } 890 891 if (ocfs2_userspace_stack(osb) && 892 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 893 OCFS2_STACK_LABEL_LEN)) { 894 mlog(ML_ERROR, 895 "cluster stack passed to mount (\"%s\") does not " 896 "match the filesystem (\"%s\")\n", 897 mopt->cluster_stack, 898 osb->osb_cluster_stack); 899 return -EINVAL; 900 } 901 902 return 0; 903 } 904 905 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 906 { 907 int type; 908 struct super_block *sb = osb->sb; 909 unsigned int feature[OCFS2_MAXQUOTAS] = { 910 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 911 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 912 int status = 0; 913 914 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 915 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 916 continue; 917 if (unsuspend) 918 status = dquot_resume(sb, type); 919 else { 920 struct ocfs2_mem_dqinfo *oinfo; 921 922 /* Cancel periodic syncing before suspending */ 923 oinfo = sb_dqinfo(sb, type)->dqi_priv; 924 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 925 status = dquot_suspend(sb, type); 926 } 927 if (status < 0) 928 break; 929 } 930 if (status < 0) 931 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 932 "remount (error = %d).\n", status); 933 return status; 934 } 935 936 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 937 { 938 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 939 struct super_block *sb = osb->sb; 940 unsigned int feature[OCFS2_MAXQUOTAS] = { 941 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 942 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 943 unsigned int ino[OCFS2_MAXQUOTAS] = { 944 LOCAL_USER_QUOTA_SYSTEM_INODE, 945 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 946 int status; 947 int type; 948 949 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 950 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 951 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 952 continue; 953 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 954 osb->slot_num); 955 if (!inode[type]) { 956 status = -ENOENT; 957 goto out_quota_off; 958 } 959 status = dquot_enable(inode[type], type, QFMT_OCFS2, 960 DQUOT_USAGE_ENABLED); 961 if (status < 0) 962 goto out_quota_off; 963 } 964 965 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 966 iput(inode[type]); 967 return 0; 968 out_quota_off: 969 ocfs2_disable_quotas(osb); 970 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 971 iput(inode[type]); 972 mlog_errno(status); 973 return status; 974 } 975 976 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 977 { 978 int type; 979 struct inode *inode; 980 struct super_block *sb = osb->sb; 981 struct ocfs2_mem_dqinfo *oinfo; 982 983 /* We mostly ignore errors in this function because there's not much 984 * we can do when we see them */ 985 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 986 if (!sb_has_quota_loaded(sb, type)) 987 continue; 988 oinfo = sb_dqinfo(sb, type)->dqi_priv; 989 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 990 inode = igrab(sb->s_dquot.files[type]); 991 /* Turn off quotas. This will remove all dquot structures from 992 * memory and so they will be automatically synced to global 993 * quota files */ 994 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 995 DQUOT_LIMITS_ENABLED); 996 if (!inode) 997 continue; 998 iput(inode); 999 } 1000 } 1001 1002 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1003 { 1004 struct dentry *root; 1005 int status, sector_size; 1006 struct mount_options parsed_options; 1007 struct inode *inode = NULL; 1008 struct ocfs2_super *osb = NULL; 1009 struct buffer_head *bh = NULL; 1010 char nodestr[12]; 1011 struct ocfs2_blockcheck_stats stats; 1012 1013 trace_ocfs2_fill_super(sb, data, silent); 1014 1015 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1016 status = -EINVAL; 1017 goto read_super_error; 1018 } 1019 1020 /* probe for superblock */ 1021 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1022 if (status < 0) { 1023 mlog(ML_ERROR, "superblock probe failed!\n"); 1024 goto read_super_error; 1025 } 1026 1027 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1028 osb = OCFS2_SB(sb); 1029 if (status < 0) { 1030 mlog_errno(status); 1031 goto read_super_error; 1032 } 1033 brelse(bh); 1034 bh = NULL; 1035 1036 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1037 status = -EINVAL; 1038 goto read_super_error; 1039 } 1040 osb->s_mount_opt = parsed_options.mount_opt; 1041 osb->s_atime_quantum = parsed_options.atime_quantum; 1042 osb->preferred_slot = parsed_options.slot; 1043 osb->osb_commit_interval = parsed_options.commit_interval; 1044 1045 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1046 osb->osb_resv_level = parsed_options.resv_level; 1047 osb->osb_dir_resv_level = parsed_options.resv_level; 1048 if (parsed_options.dir_resv_level == -1) 1049 osb->osb_dir_resv_level = parsed_options.resv_level; 1050 else 1051 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1052 1053 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1054 if (status) 1055 goto read_super_error; 1056 1057 sb->s_magic = OCFS2_SUPER_MAGIC; 1058 1059 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) | 1060 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0); 1061 1062 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY, 1063 * heartbeat=none */ 1064 if (bdev_read_only(sb->s_bdev)) { 1065 if (!sb_rdonly(sb)) { 1066 status = -EACCES; 1067 mlog(ML_ERROR, "Readonly device detected but readonly " 1068 "mount was not specified.\n"); 1069 goto read_super_error; 1070 } 1071 1072 /* You should not be able to start a local heartbeat 1073 * on a readonly device. */ 1074 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1075 status = -EROFS; 1076 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1077 "device.\n"); 1078 goto read_super_error; 1079 } 1080 1081 status = ocfs2_check_journals_nolocks(osb); 1082 if (status < 0) { 1083 if (status == -EROFS) 1084 mlog(ML_ERROR, "Recovery required on readonly " 1085 "file system, but write access is " 1086 "unavailable.\n"); 1087 else 1088 mlog_errno(status); 1089 goto read_super_error; 1090 } 1091 1092 ocfs2_set_ro_flag(osb, 1); 1093 1094 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1095 "Cluster services will not be used for this mount. " 1096 "Recovery will be skipped.\n", osb->dev_str); 1097 } 1098 1099 if (!ocfs2_is_hard_readonly(osb)) { 1100 if (sb_rdonly(sb)) 1101 ocfs2_set_ro_flag(osb, 0); 1102 } 1103 1104 status = ocfs2_verify_heartbeat(osb); 1105 if (status < 0) { 1106 mlog_errno(status); 1107 goto read_super_error; 1108 } 1109 1110 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1111 ocfs2_debugfs_root); 1112 if (!osb->osb_debug_root) { 1113 status = -EINVAL; 1114 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1115 goto read_super_error; 1116 } 1117 1118 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1119 osb->osb_debug_root, 1120 osb, 1121 &ocfs2_osb_debug_fops); 1122 if (!osb->osb_ctxt) { 1123 status = -EINVAL; 1124 mlog_errno(status); 1125 goto read_super_error; 1126 } 1127 1128 if (ocfs2_meta_ecc(osb)) { 1129 status = ocfs2_blockcheck_stats_debugfs_install( 1130 &osb->osb_ecc_stats, 1131 osb->osb_debug_root); 1132 if (status) { 1133 mlog(ML_ERROR, 1134 "Unable to create blockcheck statistics " 1135 "files\n"); 1136 goto read_super_error; 1137 } 1138 } 1139 1140 status = ocfs2_mount_volume(sb); 1141 if (status < 0) 1142 goto read_super_error; 1143 1144 if (osb->root_inode) 1145 inode = igrab(osb->root_inode); 1146 1147 if (!inode) { 1148 status = -EIO; 1149 mlog_errno(status); 1150 goto read_super_error; 1151 } 1152 1153 root = d_make_root(inode); 1154 if (!root) { 1155 status = -ENOMEM; 1156 mlog_errno(status); 1157 goto read_super_error; 1158 } 1159 1160 sb->s_root = root; 1161 1162 ocfs2_complete_mount_recovery(osb); 1163 1164 if (ocfs2_mount_local(osb)) 1165 snprintf(nodestr, sizeof(nodestr), "local"); 1166 else 1167 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1168 1169 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1170 "with %s data mode.\n", 1171 osb->dev_str, nodestr, osb->slot_num, 1172 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1173 "ordered"); 1174 1175 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1176 wake_up(&osb->osb_mount_event); 1177 1178 /* Now we can initialize quotas because we can afford to wait 1179 * for cluster locks recovery now. That also means that truncation 1180 * log recovery can happen but that waits for proper quota setup */ 1181 if (!sb_rdonly(sb)) { 1182 status = ocfs2_enable_quotas(osb); 1183 if (status < 0) { 1184 /* We have to err-out specially here because 1185 * s_root is already set */ 1186 mlog_errno(status); 1187 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1188 wake_up(&osb->osb_mount_event); 1189 return status; 1190 } 1191 } 1192 1193 ocfs2_complete_quota_recovery(osb); 1194 1195 /* Now we wake up again for processes waiting for quotas */ 1196 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1197 wake_up(&osb->osb_mount_event); 1198 1199 /* Start this when the mount is almost sure of being successful */ 1200 ocfs2_orphan_scan_start(osb); 1201 1202 /* Create filecheck sysfile /sys/fs/ocfs2/<devname>/filecheck */ 1203 ocfs2_filecheck_create_sysfs(sb); 1204 1205 return status; 1206 1207 read_super_error: 1208 brelse(bh); 1209 1210 if (status) 1211 mlog_errno(status); 1212 1213 if (osb) { 1214 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1215 wake_up(&osb->osb_mount_event); 1216 ocfs2_dismount_volume(sb, 1); 1217 } 1218 1219 return status; 1220 } 1221 1222 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1223 int flags, 1224 const char *dev_name, 1225 void *data) 1226 { 1227 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1228 } 1229 1230 static struct file_system_type ocfs2_fs_type = { 1231 .owner = THIS_MODULE, 1232 .name = "ocfs2", 1233 .mount = ocfs2_mount, 1234 .kill_sb = kill_block_super, 1235 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1236 .next = NULL 1237 }; 1238 MODULE_ALIAS_FS("ocfs2"); 1239 1240 static int ocfs2_check_set_options(struct super_block *sb, 1241 struct mount_options *options) 1242 { 1243 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1244 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1245 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1246 mlog(ML_ERROR, "User quotas were requested, but this " 1247 "filesystem does not have the feature enabled.\n"); 1248 return 0; 1249 } 1250 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1251 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1252 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1253 mlog(ML_ERROR, "Group quotas were requested, but this " 1254 "filesystem does not have the feature enabled.\n"); 1255 return 0; 1256 } 1257 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1258 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1259 mlog(ML_ERROR, "ACL support requested but extended attributes " 1260 "feature is not enabled\n"); 1261 return 0; 1262 } 1263 /* No ACL setting specified? Use XATTR feature... */ 1264 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1265 OCFS2_MOUNT_NO_POSIX_ACL))) { 1266 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1267 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1268 else 1269 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1270 } 1271 return 1; 1272 } 1273 1274 static int ocfs2_parse_options(struct super_block *sb, 1275 char *options, 1276 struct mount_options *mopt, 1277 int is_remount) 1278 { 1279 int status, user_stack = 0; 1280 char *p; 1281 u32 tmp; 1282 int token, option; 1283 substring_t args[MAX_OPT_ARGS]; 1284 1285 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1286 1287 mopt->commit_interval = 0; 1288 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1289 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1290 mopt->slot = OCFS2_INVALID_SLOT; 1291 mopt->localalloc_opt = -1; 1292 mopt->cluster_stack[0] = '\0'; 1293 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1294 mopt->dir_resv_level = -1; 1295 1296 if (!options) { 1297 status = 1; 1298 goto bail; 1299 } 1300 1301 while ((p = strsep(&options, ",")) != NULL) { 1302 if (!*p) 1303 continue; 1304 1305 token = match_token(p, tokens, args); 1306 switch (token) { 1307 case Opt_hb_local: 1308 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1309 break; 1310 case Opt_hb_none: 1311 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1312 break; 1313 case Opt_hb_global: 1314 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1315 break; 1316 case Opt_barrier: 1317 if (match_int(&args[0], &option)) { 1318 status = 0; 1319 goto bail; 1320 } 1321 if (option) 1322 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1323 else 1324 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1325 break; 1326 case Opt_intr: 1327 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1328 break; 1329 case Opt_nointr: 1330 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1331 break; 1332 case Opt_err_panic: 1333 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1334 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1335 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1336 break; 1337 case Opt_err_ro: 1338 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1339 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1340 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1341 break; 1342 case Opt_err_cont: 1343 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1344 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1345 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1346 break; 1347 case Opt_data_ordered: 1348 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1349 break; 1350 case Opt_data_writeback: 1351 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1352 break; 1353 case Opt_user_xattr: 1354 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1355 break; 1356 case Opt_nouser_xattr: 1357 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1358 break; 1359 case Opt_atime_quantum: 1360 if (match_int(&args[0], &option)) { 1361 status = 0; 1362 goto bail; 1363 } 1364 if (option >= 0) 1365 mopt->atime_quantum = option; 1366 break; 1367 case Opt_slot: 1368 if (match_int(&args[0], &option)) { 1369 status = 0; 1370 goto bail; 1371 } 1372 if (option) 1373 mopt->slot = (s16)option; 1374 break; 1375 case Opt_commit: 1376 if (match_int(&args[0], &option)) { 1377 status = 0; 1378 goto bail; 1379 } 1380 if (option < 0) 1381 return 0; 1382 if (option == 0) 1383 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1384 mopt->commit_interval = HZ * option; 1385 break; 1386 case Opt_localalloc: 1387 if (match_int(&args[0], &option)) { 1388 status = 0; 1389 goto bail; 1390 } 1391 if (option >= 0) 1392 mopt->localalloc_opt = option; 1393 break; 1394 case Opt_localflocks: 1395 /* 1396 * Changing this during remount could race 1397 * flock() requests, or "unbalance" existing 1398 * ones (e.g., a lock is taken in one mode but 1399 * dropped in the other). If users care enough 1400 * to flip locking modes during remount, we 1401 * could add a "local" flag to individual 1402 * flock structures for proper tracking of 1403 * state. 1404 */ 1405 if (!is_remount) 1406 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1407 break; 1408 case Opt_stack: 1409 /* Check both that the option we were passed 1410 * is of the right length and that it is a proper 1411 * string of the right length. 1412 */ 1413 if (((args[0].to - args[0].from) != 1414 OCFS2_STACK_LABEL_LEN) || 1415 (strnlen(args[0].from, 1416 OCFS2_STACK_LABEL_LEN) != 1417 OCFS2_STACK_LABEL_LEN)) { 1418 mlog(ML_ERROR, 1419 "Invalid cluster_stack option\n"); 1420 status = 0; 1421 goto bail; 1422 } 1423 memcpy(mopt->cluster_stack, args[0].from, 1424 OCFS2_STACK_LABEL_LEN); 1425 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1426 /* 1427 * Open code the memcmp here as we don't have 1428 * an osb to pass to 1429 * ocfs2_userspace_stack(). 1430 */ 1431 if (memcmp(mopt->cluster_stack, 1432 OCFS2_CLASSIC_CLUSTER_STACK, 1433 OCFS2_STACK_LABEL_LEN)) 1434 user_stack = 1; 1435 break; 1436 case Opt_inode64: 1437 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1438 break; 1439 case Opt_usrquota: 1440 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1441 break; 1442 case Opt_grpquota: 1443 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1444 break; 1445 case Opt_coherency_buffered: 1446 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1447 break; 1448 case Opt_coherency_full: 1449 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1450 break; 1451 case Opt_acl: 1452 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1453 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1454 break; 1455 case Opt_noacl: 1456 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1457 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1458 break; 1459 case Opt_resv_level: 1460 if (is_remount) 1461 break; 1462 if (match_int(&args[0], &option)) { 1463 status = 0; 1464 goto bail; 1465 } 1466 if (option >= OCFS2_MIN_RESV_LEVEL && 1467 option < OCFS2_MAX_RESV_LEVEL) 1468 mopt->resv_level = option; 1469 break; 1470 case Opt_dir_resv_level: 1471 if (is_remount) 1472 break; 1473 if (match_int(&args[0], &option)) { 1474 status = 0; 1475 goto bail; 1476 } 1477 if (option >= OCFS2_MIN_RESV_LEVEL && 1478 option < OCFS2_MAX_RESV_LEVEL) 1479 mopt->dir_resv_level = option; 1480 break; 1481 case Opt_journal_async_commit: 1482 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1483 break; 1484 default: 1485 mlog(ML_ERROR, 1486 "Unrecognized mount option \"%s\" " 1487 "or missing value\n", p); 1488 status = 0; 1489 goto bail; 1490 } 1491 } 1492 1493 if (user_stack == 0) { 1494 /* Ensure only one heartbeat mode */ 1495 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1496 OCFS2_MOUNT_HB_GLOBAL | 1497 OCFS2_MOUNT_HB_NONE); 1498 if (hweight32(tmp) != 1) { 1499 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1500 status = 0; 1501 goto bail; 1502 } 1503 } 1504 1505 status = 1; 1506 1507 bail: 1508 return status; 1509 } 1510 1511 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1512 { 1513 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1514 unsigned long opts = osb->s_mount_opt; 1515 unsigned int local_alloc_megs; 1516 1517 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1518 seq_printf(s, ",_netdev"); 1519 if (opts & OCFS2_MOUNT_HB_LOCAL) 1520 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1521 else 1522 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1523 } else 1524 seq_printf(s, ",%s", OCFS2_HB_NONE); 1525 1526 if (opts & OCFS2_MOUNT_NOINTR) 1527 seq_printf(s, ",nointr"); 1528 1529 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1530 seq_printf(s, ",data=writeback"); 1531 else 1532 seq_printf(s, ",data=ordered"); 1533 1534 if (opts & OCFS2_MOUNT_BARRIER) 1535 seq_printf(s, ",barrier=1"); 1536 1537 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1538 seq_printf(s, ",errors=panic"); 1539 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1540 seq_printf(s, ",errors=continue"); 1541 else 1542 seq_printf(s, ",errors=remount-ro"); 1543 1544 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1545 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1546 1547 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1548 1549 if (osb->osb_commit_interval) 1550 seq_printf(s, ",commit=%u", 1551 (unsigned) (osb->osb_commit_interval / HZ)); 1552 1553 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1554 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1555 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1556 1557 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1558 seq_printf(s, ",localflocks,"); 1559 1560 if (osb->osb_cluster_stack[0]) 1561 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1562 OCFS2_STACK_LABEL_LEN); 1563 if (opts & OCFS2_MOUNT_USRQUOTA) 1564 seq_printf(s, ",usrquota"); 1565 if (opts & OCFS2_MOUNT_GRPQUOTA) 1566 seq_printf(s, ",grpquota"); 1567 1568 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1569 seq_printf(s, ",coherency=buffered"); 1570 else 1571 seq_printf(s, ",coherency=full"); 1572 1573 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1574 seq_printf(s, ",nouser_xattr"); 1575 else 1576 seq_printf(s, ",user_xattr"); 1577 1578 if (opts & OCFS2_MOUNT_INODE64) 1579 seq_printf(s, ",inode64"); 1580 1581 if (opts & OCFS2_MOUNT_POSIX_ACL) 1582 seq_printf(s, ",acl"); 1583 else 1584 seq_printf(s, ",noacl"); 1585 1586 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1587 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1588 1589 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1590 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1591 1592 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1593 seq_printf(s, ",journal_async_commit"); 1594 1595 return 0; 1596 } 1597 1598 static int __init ocfs2_init(void) 1599 { 1600 int status; 1601 1602 status = init_ocfs2_uptodate_cache(); 1603 if (status < 0) 1604 goto out1; 1605 1606 status = ocfs2_initialize_mem_caches(); 1607 if (status < 0) 1608 goto out2; 1609 1610 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1611 if (!ocfs2_debugfs_root) { 1612 status = -ENOMEM; 1613 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1614 goto out3; 1615 } 1616 1617 ocfs2_set_locking_protocol(); 1618 1619 status = register_quota_format(&ocfs2_quota_format); 1620 if (status < 0) 1621 goto out3; 1622 status = register_filesystem(&ocfs2_fs_type); 1623 if (!status) 1624 return 0; 1625 1626 unregister_quota_format(&ocfs2_quota_format); 1627 out3: 1628 debugfs_remove(ocfs2_debugfs_root); 1629 ocfs2_free_mem_caches(); 1630 out2: 1631 exit_ocfs2_uptodate_cache(); 1632 out1: 1633 mlog_errno(status); 1634 return status; 1635 } 1636 1637 static void __exit ocfs2_exit(void) 1638 { 1639 unregister_quota_format(&ocfs2_quota_format); 1640 1641 debugfs_remove(ocfs2_debugfs_root); 1642 1643 ocfs2_free_mem_caches(); 1644 1645 unregister_filesystem(&ocfs2_fs_type); 1646 1647 exit_ocfs2_uptodate_cache(); 1648 } 1649 1650 static void ocfs2_put_super(struct super_block *sb) 1651 { 1652 trace_ocfs2_put_super(sb); 1653 1654 ocfs2_sync_blockdev(sb); 1655 ocfs2_dismount_volume(sb, 0); 1656 ocfs2_filecheck_remove_sysfs(sb); 1657 } 1658 1659 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1660 { 1661 struct ocfs2_super *osb; 1662 u32 numbits, freebits; 1663 int status; 1664 struct ocfs2_dinode *bm_lock; 1665 struct buffer_head *bh = NULL; 1666 struct inode *inode = NULL; 1667 1668 trace_ocfs2_statfs(dentry->d_sb, buf); 1669 1670 osb = OCFS2_SB(dentry->d_sb); 1671 1672 inode = ocfs2_get_system_file_inode(osb, 1673 GLOBAL_BITMAP_SYSTEM_INODE, 1674 OCFS2_INVALID_SLOT); 1675 if (!inode) { 1676 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1677 status = -EIO; 1678 goto bail; 1679 } 1680 1681 status = ocfs2_inode_lock(inode, &bh, 0); 1682 if (status < 0) { 1683 mlog_errno(status); 1684 goto bail; 1685 } 1686 1687 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1688 1689 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1690 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1691 1692 buf->f_type = OCFS2_SUPER_MAGIC; 1693 buf->f_bsize = dentry->d_sb->s_blocksize; 1694 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1695 buf->f_blocks = ((sector_t) numbits) * 1696 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1697 buf->f_bfree = ((sector_t) freebits) * 1698 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1699 buf->f_bavail = buf->f_bfree; 1700 buf->f_files = numbits; 1701 buf->f_ffree = freebits; 1702 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1703 & 0xFFFFFFFFUL; 1704 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1705 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1706 1707 brelse(bh); 1708 1709 ocfs2_inode_unlock(inode, 0); 1710 status = 0; 1711 bail: 1712 iput(inode); 1713 1714 if (status) 1715 mlog_errno(status); 1716 1717 return status; 1718 } 1719 1720 static void ocfs2_inode_init_once(void *data) 1721 { 1722 struct ocfs2_inode_info *oi = data; 1723 1724 oi->ip_flags = 0; 1725 oi->ip_open_count = 0; 1726 spin_lock_init(&oi->ip_lock); 1727 ocfs2_extent_map_init(&oi->vfs_inode); 1728 INIT_LIST_HEAD(&oi->ip_io_markers); 1729 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1730 oi->ip_dir_start_lookup = 0; 1731 init_rwsem(&oi->ip_alloc_sem); 1732 init_rwsem(&oi->ip_xattr_sem); 1733 mutex_init(&oi->ip_io_mutex); 1734 1735 oi->ip_blkno = 0ULL; 1736 oi->ip_clusters = 0; 1737 1738 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1739 1740 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1741 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1742 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1743 1744 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1745 &ocfs2_inode_caching_ops); 1746 1747 inode_init_once(&oi->vfs_inode); 1748 } 1749 1750 static int ocfs2_initialize_mem_caches(void) 1751 { 1752 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1753 sizeof(struct ocfs2_inode_info), 1754 0, 1755 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1756 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1757 ocfs2_inode_init_once); 1758 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1759 sizeof(struct ocfs2_dquot), 1760 0, 1761 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1762 SLAB_MEM_SPREAD), 1763 NULL); 1764 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1765 sizeof(struct ocfs2_quota_chunk), 1766 0, 1767 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1768 NULL); 1769 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1770 !ocfs2_qf_chunk_cachep) { 1771 if (ocfs2_inode_cachep) 1772 kmem_cache_destroy(ocfs2_inode_cachep); 1773 if (ocfs2_dquot_cachep) 1774 kmem_cache_destroy(ocfs2_dquot_cachep); 1775 if (ocfs2_qf_chunk_cachep) 1776 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1777 return -ENOMEM; 1778 } 1779 1780 return 0; 1781 } 1782 1783 static void ocfs2_free_mem_caches(void) 1784 { 1785 /* 1786 * Make sure all delayed rcu free inodes are flushed before we 1787 * destroy cache. 1788 */ 1789 rcu_barrier(); 1790 if (ocfs2_inode_cachep) 1791 kmem_cache_destroy(ocfs2_inode_cachep); 1792 ocfs2_inode_cachep = NULL; 1793 1794 if (ocfs2_dquot_cachep) 1795 kmem_cache_destroy(ocfs2_dquot_cachep); 1796 ocfs2_dquot_cachep = NULL; 1797 1798 if (ocfs2_qf_chunk_cachep) 1799 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1800 ocfs2_qf_chunk_cachep = NULL; 1801 } 1802 1803 static int ocfs2_get_sector(struct super_block *sb, 1804 struct buffer_head **bh, 1805 int block, 1806 int sect_size) 1807 { 1808 if (!sb_set_blocksize(sb, sect_size)) { 1809 mlog(ML_ERROR, "unable to set blocksize\n"); 1810 return -EIO; 1811 } 1812 1813 *bh = sb_getblk(sb, block); 1814 if (!*bh) { 1815 mlog_errno(-ENOMEM); 1816 return -ENOMEM; 1817 } 1818 lock_buffer(*bh); 1819 if (!buffer_dirty(*bh)) 1820 clear_buffer_uptodate(*bh); 1821 unlock_buffer(*bh); 1822 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1823 wait_on_buffer(*bh); 1824 if (!buffer_uptodate(*bh)) { 1825 mlog_errno(-EIO); 1826 brelse(*bh); 1827 *bh = NULL; 1828 return -EIO; 1829 } 1830 1831 return 0; 1832 } 1833 1834 static int ocfs2_mount_volume(struct super_block *sb) 1835 { 1836 int status = 0; 1837 int unlock_super = 0; 1838 struct ocfs2_super *osb = OCFS2_SB(sb); 1839 1840 if (ocfs2_is_hard_readonly(osb)) 1841 goto leave; 1842 1843 status = ocfs2_dlm_init(osb); 1844 if (status < 0) { 1845 mlog_errno(status); 1846 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1847 mlog(ML_ERROR, "couldn't mount because cluster name on" 1848 " disk does not match the running cluster name.\n"); 1849 goto leave; 1850 } 1851 1852 status = ocfs2_super_lock(osb, 1); 1853 if (status < 0) { 1854 mlog_errno(status); 1855 goto leave; 1856 } 1857 unlock_super = 1; 1858 1859 /* This will load up the node map and add ourselves to it. */ 1860 status = ocfs2_find_slot(osb); 1861 if (status < 0) { 1862 mlog_errno(status); 1863 goto leave; 1864 } 1865 1866 /* load all node-local system inodes */ 1867 status = ocfs2_init_local_system_inodes(osb); 1868 if (status < 0) { 1869 mlog_errno(status); 1870 goto leave; 1871 } 1872 1873 status = ocfs2_check_volume(osb); 1874 if (status < 0) { 1875 mlog_errno(status); 1876 goto leave; 1877 } 1878 1879 status = ocfs2_truncate_log_init(osb); 1880 if (status < 0) 1881 mlog_errno(status); 1882 1883 leave: 1884 if (unlock_super) 1885 ocfs2_super_unlock(osb, 1); 1886 1887 return status; 1888 } 1889 1890 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1891 { 1892 int tmp, hangup_needed = 0; 1893 struct ocfs2_super *osb = NULL; 1894 char nodestr[12]; 1895 1896 trace_ocfs2_dismount_volume(sb); 1897 1898 BUG_ON(!sb); 1899 osb = OCFS2_SB(sb); 1900 BUG_ON(!osb); 1901 1902 debugfs_remove(osb->osb_ctxt); 1903 1904 /* Orphan scan should be stopped as early as possible */ 1905 ocfs2_orphan_scan_stop(osb); 1906 1907 ocfs2_disable_quotas(osb); 1908 1909 /* All dquots should be freed by now */ 1910 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1911 /* Wait for worker to be done with the work structure in osb */ 1912 cancel_work_sync(&osb->dquot_drop_work); 1913 1914 ocfs2_shutdown_local_alloc(osb); 1915 1916 ocfs2_truncate_log_shutdown(osb); 1917 1918 /* This will disable recovery and flush any recovery work. */ 1919 ocfs2_recovery_exit(osb); 1920 1921 ocfs2_journal_shutdown(osb); 1922 1923 ocfs2_sync_blockdev(sb); 1924 1925 ocfs2_purge_refcount_trees(osb); 1926 1927 /* No cluster connection means we've failed during mount, so skip 1928 * all the steps which depended on that to complete. */ 1929 if (osb->cconn) { 1930 tmp = ocfs2_super_lock(osb, 1); 1931 if (tmp < 0) { 1932 mlog_errno(tmp); 1933 return; 1934 } 1935 } 1936 1937 if (osb->slot_num != OCFS2_INVALID_SLOT) 1938 ocfs2_put_slot(osb); 1939 1940 if (osb->cconn) 1941 ocfs2_super_unlock(osb, 1); 1942 1943 ocfs2_release_system_inodes(osb); 1944 1945 /* 1946 * If we're dismounting due to mount error, mount.ocfs2 will clean 1947 * up heartbeat. If we're a local mount, there is no heartbeat. 1948 * If we failed before we got a uuid_str yet, we can't stop 1949 * heartbeat. Otherwise, do it. 1950 */ 1951 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1952 !ocfs2_is_hard_readonly(osb)) 1953 hangup_needed = 1; 1954 1955 if (osb->cconn) 1956 ocfs2_dlm_shutdown(osb, hangup_needed); 1957 1958 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1959 debugfs_remove(osb->osb_debug_root); 1960 1961 if (hangup_needed) 1962 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1963 1964 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1965 1966 if (ocfs2_mount_local(osb)) 1967 snprintf(nodestr, sizeof(nodestr), "local"); 1968 else 1969 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1970 1971 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1972 osb->dev_str, nodestr); 1973 1974 ocfs2_delete_osb(osb); 1975 kfree(osb); 1976 sb->s_dev = 0; 1977 sb->s_fs_info = NULL; 1978 } 1979 1980 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1981 unsigned uuid_bytes) 1982 { 1983 int i, ret; 1984 char *ptr; 1985 1986 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1987 1988 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1989 if (osb->uuid_str == NULL) 1990 return -ENOMEM; 1991 1992 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1993 /* print with null */ 1994 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1995 if (ret != 2) /* drop super cleans up */ 1996 return -EINVAL; 1997 /* then only advance past the last char */ 1998 ptr += 2; 1999 } 2000 2001 return 0; 2002 } 2003 2004 /* Make sure entire volume is addressable by our journal. Requires 2005 osb_clusters_at_boot to be valid and for the journal to have been 2006 initialized by ocfs2_journal_init(). */ 2007 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2008 { 2009 int status = 0; 2010 u64 max_block = 2011 ocfs2_clusters_to_blocks(osb->sb, 2012 osb->osb_clusters_at_boot) - 1; 2013 2014 /* 32-bit block number is always OK. */ 2015 if (max_block <= (u32)~0ULL) 2016 goto out; 2017 2018 /* Volume is "huge", so see if our journal is new enough to 2019 support it. */ 2020 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2021 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2022 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2023 JBD2_FEATURE_INCOMPAT_64BIT))) { 2024 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2025 "Enable the 'block64' journal option with tunefs.ocfs2"); 2026 status = -EFBIG; 2027 goto out; 2028 } 2029 2030 out: 2031 return status; 2032 } 2033 2034 static int ocfs2_initialize_super(struct super_block *sb, 2035 struct buffer_head *bh, 2036 int sector_size, 2037 struct ocfs2_blockcheck_stats *stats) 2038 { 2039 int status; 2040 int i, cbits, bbits; 2041 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2042 struct inode *inode = NULL; 2043 struct ocfs2_journal *journal; 2044 struct ocfs2_super *osb; 2045 u64 total_blocks; 2046 2047 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2048 if (!osb) { 2049 status = -ENOMEM; 2050 mlog_errno(status); 2051 goto bail; 2052 } 2053 2054 sb->s_fs_info = osb; 2055 sb->s_op = &ocfs2_sops; 2056 sb->s_d_op = &ocfs2_dentry_ops; 2057 sb->s_export_op = &ocfs2_export_ops; 2058 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2059 sb->dq_op = &ocfs2_quota_operations; 2060 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2061 sb->s_xattr = ocfs2_xattr_handlers; 2062 sb->s_time_gran = 1; 2063 sb->s_flags |= SB_NOATIME; 2064 /* this is needed to support O_LARGEFILE */ 2065 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2066 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2067 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2068 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid, 2069 sizeof(di->id2.i_super.s_uuid)); 2070 2071 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2072 2073 for (i = 0; i < 3; i++) 2074 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2075 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2076 2077 osb->sb = sb; 2078 osb->s_sectsize_bits = blksize_bits(sector_size); 2079 BUG_ON(!osb->s_sectsize_bits); 2080 2081 spin_lock_init(&osb->dc_task_lock); 2082 init_waitqueue_head(&osb->dc_event); 2083 osb->dc_work_sequence = 0; 2084 osb->dc_wake_sequence = 0; 2085 INIT_LIST_HEAD(&osb->blocked_lock_list); 2086 osb->blocked_lock_count = 0; 2087 spin_lock_init(&osb->osb_lock); 2088 spin_lock_init(&osb->osb_xattr_lock); 2089 ocfs2_init_steal_slots(osb); 2090 2091 mutex_init(&osb->system_file_mutex); 2092 2093 atomic_set(&osb->alloc_stats.moves, 0); 2094 atomic_set(&osb->alloc_stats.local_data, 0); 2095 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2096 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2097 atomic_set(&osb->alloc_stats.bg_extends, 0); 2098 2099 /* Copy the blockcheck stats from the superblock probe */ 2100 osb->osb_ecc_stats = *stats; 2101 2102 ocfs2_init_node_maps(osb); 2103 2104 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2105 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2106 2107 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2108 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2109 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2110 osb->max_slots); 2111 status = -EINVAL; 2112 goto bail; 2113 } 2114 2115 ocfs2_orphan_scan_init(osb); 2116 2117 status = ocfs2_recovery_init(osb); 2118 if (status) { 2119 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2120 mlog_errno(status); 2121 goto bail; 2122 } 2123 2124 init_waitqueue_head(&osb->checkpoint_event); 2125 2126 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2127 2128 osb->slot_num = OCFS2_INVALID_SLOT; 2129 2130 osb->s_xattr_inline_size = le16_to_cpu( 2131 di->id2.i_super.s_xattr_inline_size); 2132 2133 osb->local_alloc_state = OCFS2_LA_UNUSED; 2134 osb->local_alloc_bh = NULL; 2135 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2136 2137 init_waitqueue_head(&osb->osb_mount_event); 2138 2139 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2140 if (status) { 2141 mlog_errno(status); 2142 goto bail; 2143 } 2144 2145 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2146 if (!osb->vol_label) { 2147 mlog(ML_ERROR, "unable to alloc vol label\n"); 2148 status = -ENOMEM; 2149 goto bail; 2150 } 2151 2152 osb->slot_recovery_generations = 2153 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2154 GFP_KERNEL); 2155 if (!osb->slot_recovery_generations) { 2156 status = -ENOMEM; 2157 mlog_errno(status); 2158 goto bail; 2159 } 2160 2161 init_waitqueue_head(&osb->osb_wipe_event); 2162 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2163 sizeof(*osb->osb_orphan_wipes), 2164 GFP_KERNEL); 2165 if (!osb->osb_orphan_wipes) { 2166 status = -ENOMEM; 2167 mlog_errno(status); 2168 goto bail; 2169 } 2170 2171 osb->osb_rf_lock_tree = RB_ROOT; 2172 2173 osb->s_feature_compat = 2174 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2175 osb->s_feature_ro_compat = 2176 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2177 osb->s_feature_incompat = 2178 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2179 2180 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2181 mlog(ML_ERROR, "couldn't mount because of unsupported " 2182 "optional features (%x).\n", i); 2183 status = -EINVAL; 2184 goto bail; 2185 } 2186 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2187 mlog(ML_ERROR, "couldn't mount RDWR because of " 2188 "unsupported optional features (%x).\n", i); 2189 status = -EINVAL; 2190 goto bail; 2191 } 2192 2193 if (ocfs2_clusterinfo_valid(osb)) { 2194 osb->osb_stackflags = 2195 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2196 strlcpy(osb->osb_cluster_stack, 2197 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2198 OCFS2_STACK_LABEL_LEN + 1); 2199 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2200 mlog(ML_ERROR, 2201 "couldn't mount because of an invalid " 2202 "cluster stack label (%s) \n", 2203 osb->osb_cluster_stack); 2204 status = -EINVAL; 2205 goto bail; 2206 } 2207 strlcpy(osb->osb_cluster_name, 2208 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2209 OCFS2_CLUSTER_NAME_LEN + 1); 2210 } else { 2211 /* The empty string is identical with classic tools that 2212 * don't know about s_cluster_info. */ 2213 osb->osb_cluster_stack[0] = '\0'; 2214 } 2215 2216 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2217 2218 /* FIXME 2219 * This should be done in ocfs2_journal_init(), but unknown 2220 * ordering issues will cause the filesystem to crash. 2221 * If anyone wants to figure out what part of the code 2222 * refers to osb->journal before ocfs2_journal_init() is run, 2223 * be my guest. 2224 */ 2225 /* initialize our journal structure */ 2226 2227 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2228 if (!journal) { 2229 mlog(ML_ERROR, "unable to alloc journal\n"); 2230 status = -ENOMEM; 2231 goto bail; 2232 } 2233 osb->journal = journal; 2234 journal->j_osb = osb; 2235 2236 atomic_set(&journal->j_num_trans, 0); 2237 init_rwsem(&journal->j_trans_barrier); 2238 init_waitqueue_head(&journal->j_checkpointed); 2239 spin_lock_init(&journal->j_lock); 2240 journal->j_trans_id = (unsigned long) 1; 2241 INIT_LIST_HEAD(&journal->j_la_cleanups); 2242 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2243 journal->j_state = OCFS2_JOURNAL_FREE; 2244 2245 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2246 init_llist_head(&osb->dquot_drop_list); 2247 2248 /* get some pseudo constants for clustersize bits */ 2249 osb->s_clustersize_bits = 2250 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2251 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2252 2253 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2254 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2255 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2256 osb->s_clustersize); 2257 status = -EINVAL; 2258 goto bail; 2259 } 2260 2261 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2262 le32_to_cpu(di->i_clusters)); 2263 2264 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2265 total_blocks); 2266 if (status) { 2267 mlog(ML_ERROR, "Volume too large " 2268 "to mount safely on this system"); 2269 status = -EFBIG; 2270 goto bail; 2271 } 2272 2273 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2274 sizeof(di->id2.i_super.s_uuid))) { 2275 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2276 status = -ENOMEM; 2277 goto bail; 2278 } 2279 2280 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2281 OCFS2_MAX_VOL_LABEL_LEN); 2282 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2283 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2284 osb->first_cluster_group_blkno = 2285 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2286 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2287 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2288 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2289 (unsigned long long)osb->root_blkno, 2290 (unsigned long long)osb->system_dir_blkno, 2291 osb->s_clustersize_bits); 2292 2293 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2294 if (!osb->osb_dlm_debug) { 2295 status = -ENOMEM; 2296 mlog_errno(status); 2297 goto bail; 2298 } 2299 2300 atomic_set(&osb->vol_state, VOLUME_INIT); 2301 2302 /* load root, system_dir, and all global system inodes */ 2303 status = ocfs2_init_global_system_inodes(osb); 2304 if (status < 0) { 2305 mlog_errno(status); 2306 goto bail; 2307 } 2308 2309 /* 2310 * global bitmap 2311 */ 2312 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2313 OCFS2_INVALID_SLOT); 2314 if (!inode) { 2315 status = -EINVAL; 2316 mlog_errno(status); 2317 goto bail; 2318 } 2319 2320 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2321 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2322 iput(inode); 2323 2324 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2325 osb->s_feature_incompat) * 8; 2326 2327 status = ocfs2_init_slot_info(osb); 2328 if (status < 0) { 2329 mlog_errno(status); 2330 goto bail; 2331 } 2332 cleancache_init_shared_fs(sb); 2333 2334 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2335 if (!osb->ocfs2_wq) { 2336 status = -ENOMEM; 2337 mlog_errno(status); 2338 } 2339 2340 bail: 2341 return status; 2342 } 2343 2344 /* 2345 * will return: -EAGAIN if it is ok to keep searching for superblocks 2346 * -EINVAL if there is a bad superblock 2347 * 0 on success 2348 */ 2349 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2350 struct buffer_head *bh, 2351 u32 blksz, 2352 struct ocfs2_blockcheck_stats *stats) 2353 { 2354 int status = -EAGAIN; 2355 2356 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2357 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2358 /* We have to do a raw check of the feature here */ 2359 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2360 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2361 status = ocfs2_block_check_validate(bh->b_data, 2362 bh->b_size, 2363 &di->i_check, 2364 stats); 2365 if (status) 2366 goto out; 2367 } 2368 status = -EINVAL; 2369 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2370 mlog(ML_ERROR, "found superblock with incorrect block " 2371 "size: found %u, should be %u\n", 2372 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2373 blksz); 2374 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2375 OCFS2_MAJOR_REV_LEVEL || 2376 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2377 OCFS2_MINOR_REV_LEVEL) { 2378 mlog(ML_ERROR, "found superblock with bad version: " 2379 "found %u.%u, should be %u.%u\n", 2380 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2381 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2382 OCFS2_MAJOR_REV_LEVEL, 2383 OCFS2_MINOR_REV_LEVEL); 2384 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2385 mlog(ML_ERROR, "bad block number on superblock: " 2386 "found %llu, should be %llu\n", 2387 (unsigned long long)le64_to_cpu(di->i_blkno), 2388 (unsigned long long)bh->b_blocknr); 2389 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2390 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2391 mlog(ML_ERROR, "bad cluster size found: %u\n", 2392 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2393 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2394 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2395 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2396 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2397 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2398 mlog(ML_ERROR, 2399 "Superblock slots found greater than file system " 2400 "maximum: found %u, max %u\n", 2401 le16_to_cpu(di->id2.i_super.s_max_slots), 2402 OCFS2_MAX_SLOTS); 2403 } else { 2404 /* found it! */ 2405 status = 0; 2406 } 2407 } 2408 2409 out: 2410 if (status && status != -EAGAIN) 2411 mlog_errno(status); 2412 return status; 2413 } 2414 2415 static int ocfs2_check_volume(struct ocfs2_super *osb) 2416 { 2417 int status; 2418 int dirty; 2419 int local; 2420 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2421 * recover 2422 * ourselves. */ 2423 2424 /* Init our journal object. */ 2425 status = ocfs2_journal_init(osb->journal, &dirty); 2426 if (status < 0) { 2427 mlog(ML_ERROR, "Could not initialize journal!\n"); 2428 goto finally; 2429 } 2430 2431 /* Now that journal has been initialized, check to make sure 2432 entire volume is addressable. */ 2433 status = ocfs2_journal_addressable(osb); 2434 if (status) 2435 goto finally; 2436 2437 /* If the journal was unmounted cleanly then we don't want to 2438 * recover anything. Otherwise, journal_load will do that 2439 * dirty work for us :) */ 2440 if (!dirty) { 2441 status = ocfs2_journal_wipe(osb->journal, 0); 2442 if (status < 0) { 2443 mlog_errno(status); 2444 goto finally; 2445 } 2446 } else { 2447 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2448 "unmounted cleanly, recovering it.\n", osb->dev_str); 2449 } 2450 2451 local = ocfs2_mount_local(osb); 2452 2453 /* will play back anything left in the journal. */ 2454 status = ocfs2_journal_load(osb->journal, local, dirty); 2455 if (status < 0) { 2456 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2457 goto finally; 2458 } 2459 2460 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2461 jbd2_journal_set_features(osb->journal->j_journal, 2462 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2463 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2464 else 2465 jbd2_journal_clear_features(osb->journal->j_journal, 2466 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2467 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2468 2469 if (dirty) { 2470 /* recover my local alloc if we didn't unmount cleanly. */ 2471 status = ocfs2_begin_local_alloc_recovery(osb, 2472 osb->slot_num, 2473 &local_alloc); 2474 if (status < 0) { 2475 mlog_errno(status); 2476 goto finally; 2477 } 2478 /* we complete the recovery process after we've marked 2479 * ourselves as mounted. */ 2480 } 2481 2482 status = ocfs2_load_local_alloc(osb); 2483 if (status < 0) { 2484 mlog_errno(status); 2485 goto finally; 2486 } 2487 2488 if (dirty) { 2489 /* Recovery will be completed after we've mounted the 2490 * rest of the volume. */ 2491 osb->local_alloc_copy = local_alloc; 2492 local_alloc = NULL; 2493 } 2494 2495 /* go through each journal, trylock it and if you get the 2496 * lock, and it's marked as dirty, set the bit in the recover 2497 * map and launch a recovery thread for it. */ 2498 status = ocfs2_mark_dead_nodes(osb); 2499 if (status < 0) { 2500 mlog_errno(status); 2501 goto finally; 2502 } 2503 2504 status = ocfs2_compute_replay_slots(osb); 2505 if (status < 0) 2506 mlog_errno(status); 2507 2508 finally: 2509 kfree(local_alloc); 2510 2511 if (status) 2512 mlog_errno(status); 2513 return status; 2514 } 2515 2516 /* 2517 * The routine gets called from dismount or close whenever a dismount on 2518 * volume is requested and the osb open count becomes 1. 2519 * It will remove the osb from the global list and also free up all the 2520 * initialized resources and fileobject. 2521 */ 2522 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2523 { 2524 /* This function assumes that the caller has the main osb resource */ 2525 2526 /* ocfs2_initializer_super have already created this workqueue */ 2527 if (osb->ocfs2_wq) 2528 destroy_workqueue(osb->ocfs2_wq); 2529 2530 ocfs2_free_slot_info(osb); 2531 2532 kfree(osb->osb_orphan_wipes); 2533 kfree(osb->slot_recovery_generations); 2534 /* FIXME 2535 * This belongs in journal shutdown, but because we have to 2536 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2537 * we free it here. 2538 */ 2539 kfree(osb->journal); 2540 kfree(osb->local_alloc_copy); 2541 kfree(osb->uuid_str); 2542 kfree(osb->vol_label); 2543 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2544 memset(osb, 0, sizeof(struct ocfs2_super)); 2545 } 2546 2547 /* Depending on the mount option passed, perform one of the following: 2548 * Put OCFS2 into a readonly state (default) 2549 * Return EIO so that only the process errs 2550 * Fix the error as if fsck.ocfs2 -y 2551 * panic 2552 */ 2553 static int ocfs2_handle_error(struct super_block *sb) 2554 { 2555 struct ocfs2_super *osb = OCFS2_SB(sb); 2556 int rv = 0; 2557 2558 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2559 pr_crit("On-disk corruption discovered. " 2560 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2561 2562 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2563 panic("OCFS2: (device %s): panic forced after error\n", 2564 sb->s_id); 2565 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2566 pr_crit("OCFS2: Returning error to the calling process.\n"); 2567 rv = -EIO; 2568 } else { /* default option */ 2569 rv = -EROFS; 2570 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb))) 2571 return rv; 2572 2573 pr_crit("OCFS2: File system is now read-only.\n"); 2574 sb->s_flags |= SB_RDONLY; 2575 ocfs2_set_ro_flag(osb, 0); 2576 } 2577 2578 return rv; 2579 } 2580 2581 int __ocfs2_error(struct super_block *sb, const char *function, 2582 const char *fmt, ...) 2583 { 2584 struct va_format vaf; 2585 va_list args; 2586 2587 va_start(args, fmt); 2588 vaf.fmt = fmt; 2589 vaf.va = &args; 2590 2591 /* Not using mlog here because we want to show the actual 2592 * function the error came from. */ 2593 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2594 sb->s_id, function, &vaf); 2595 2596 va_end(args); 2597 2598 return ocfs2_handle_error(sb); 2599 } 2600 2601 /* Handle critical errors. This is intentionally more drastic than 2602 * ocfs2_handle_error, so we only use for things like journal errors, 2603 * etc. */ 2604 void __ocfs2_abort(struct super_block *sb, const char *function, 2605 const char *fmt, ...) 2606 { 2607 struct va_format vaf; 2608 va_list args; 2609 2610 va_start(args, fmt); 2611 2612 vaf.fmt = fmt; 2613 vaf.va = &args; 2614 2615 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2616 sb->s_id, function, &vaf); 2617 2618 va_end(args); 2619 2620 /* We don't have the cluster support yet to go straight to 2621 * hard readonly in here. Until then, we want to keep 2622 * ocfs2_abort() so that we can at least mark critical 2623 * errors. 2624 * 2625 * TODO: This should abort the journal and alert other nodes 2626 * that our slot needs recovery. */ 2627 2628 /* Force a panic(). This stinks, but it's better than letting 2629 * things continue without having a proper hard readonly 2630 * here. */ 2631 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2632 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2633 ocfs2_handle_error(sb); 2634 } 2635 2636 /* 2637 * Void signal blockers, because in-kernel sigprocmask() only fails 2638 * when SIG_* is wrong. 2639 */ 2640 void ocfs2_block_signals(sigset_t *oldset) 2641 { 2642 int rc; 2643 sigset_t blocked; 2644 2645 sigfillset(&blocked); 2646 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2647 BUG_ON(rc); 2648 } 2649 2650 void ocfs2_unblock_signals(sigset_t *oldset) 2651 { 2652 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2653 BUG_ON(rc); 2654 } 2655 2656 module_init(ocfs2_init); 2657 module_exit(ocfs2_exit); 2658