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(osb->journal->j_journal, 427 &target)) { 428 if (wait) 429 jbd2_log_wait_commit(osb->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 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL, 1165 &ocfs2_kset->kobj); 1166 if (!osb->osb_dev_kset) { 1167 status = -ENOMEM; 1168 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id); 1169 goto read_super_error; 1170 } 1171 1172 /* Create filecheck sysfs related directories/files at 1173 * /sys/fs/ocfs2/<devname>/filecheck */ 1174 if (ocfs2_filecheck_create_sysfs(osb)) { 1175 status = -ENOMEM; 1176 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at " 1177 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id); 1178 goto read_super_error; 1179 } 1180 1181 if (ocfs2_mount_local(osb)) 1182 snprintf(nodestr, sizeof(nodestr), "local"); 1183 else 1184 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1185 1186 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1187 "with %s data mode.\n", 1188 osb->dev_str, nodestr, osb->slot_num, 1189 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1190 "ordered"); 1191 1192 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1193 wake_up(&osb->osb_mount_event); 1194 1195 /* Now we can initialize quotas because we can afford to wait 1196 * for cluster locks recovery now. That also means that truncation 1197 * log recovery can happen but that waits for proper quota setup */ 1198 if (!sb_rdonly(sb)) { 1199 status = ocfs2_enable_quotas(osb); 1200 if (status < 0) { 1201 /* We have to err-out specially here because 1202 * s_root is already set */ 1203 mlog_errno(status); 1204 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1205 wake_up(&osb->osb_mount_event); 1206 return status; 1207 } 1208 } 1209 1210 ocfs2_complete_quota_recovery(osb); 1211 1212 /* Now we wake up again for processes waiting for quotas */ 1213 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1214 wake_up(&osb->osb_mount_event); 1215 1216 /* Start this when the mount is almost sure of being successful */ 1217 ocfs2_orphan_scan_start(osb); 1218 1219 return status; 1220 1221 read_super_error: 1222 brelse(bh); 1223 1224 if (status) 1225 mlog_errno(status); 1226 1227 if (osb) { 1228 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1229 wake_up(&osb->osb_mount_event); 1230 ocfs2_dismount_volume(sb, 1); 1231 } 1232 1233 return status; 1234 } 1235 1236 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1237 int flags, 1238 const char *dev_name, 1239 void *data) 1240 { 1241 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1242 } 1243 1244 static struct file_system_type ocfs2_fs_type = { 1245 .owner = THIS_MODULE, 1246 .name = "ocfs2", 1247 .mount = ocfs2_mount, 1248 .kill_sb = kill_block_super, 1249 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1250 .next = NULL 1251 }; 1252 MODULE_ALIAS_FS("ocfs2"); 1253 1254 static int ocfs2_check_set_options(struct super_block *sb, 1255 struct mount_options *options) 1256 { 1257 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1258 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1259 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1260 mlog(ML_ERROR, "User quotas were requested, but this " 1261 "filesystem does not have the feature enabled.\n"); 1262 return 0; 1263 } 1264 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1265 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1266 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1267 mlog(ML_ERROR, "Group quotas were requested, but this " 1268 "filesystem does not have the feature enabled.\n"); 1269 return 0; 1270 } 1271 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1272 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1273 mlog(ML_ERROR, "ACL support requested but extended attributes " 1274 "feature is not enabled\n"); 1275 return 0; 1276 } 1277 /* No ACL setting specified? Use XATTR feature... */ 1278 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1279 OCFS2_MOUNT_NO_POSIX_ACL))) { 1280 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1281 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1282 else 1283 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1284 } 1285 return 1; 1286 } 1287 1288 static int ocfs2_parse_options(struct super_block *sb, 1289 char *options, 1290 struct mount_options *mopt, 1291 int is_remount) 1292 { 1293 int status, user_stack = 0; 1294 char *p; 1295 u32 tmp; 1296 int token, option; 1297 substring_t args[MAX_OPT_ARGS]; 1298 1299 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1300 1301 mopt->commit_interval = 0; 1302 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1303 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1304 mopt->slot = OCFS2_INVALID_SLOT; 1305 mopt->localalloc_opt = -1; 1306 mopt->cluster_stack[0] = '\0'; 1307 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1308 mopt->dir_resv_level = -1; 1309 1310 if (!options) { 1311 status = 1; 1312 goto bail; 1313 } 1314 1315 while ((p = strsep(&options, ",")) != NULL) { 1316 if (!*p) 1317 continue; 1318 1319 token = match_token(p, tokens, args); 1320 switch (token) { 1321 case Opt_hb_local: 1322 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1323 break; 1324 case Opt_hb_none: 1325 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1326 break; 1327 case Opt_hb_global: 1328 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1329 break; 1330 case Opt_barrier: 1331 if (match_int(&args[0], &option)) { 1332 status = 0; 1333 goto bail; 1334 } 1335 if (option) 1336 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1337 else 1338 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1339 break; 1340 case Opt_intr: 1341 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1342 break; 1343 case Opt_nointr: 1344 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1345 break; 1346 case Opt_err_panic: 1347 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1348 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1349 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1350 break; 1351 case Opt_err_ro: 1352 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1353 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1354 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1355 break; 1356 case Opt_err_cont: 1357 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1358 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1359 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1360 break; 1361 case Opt_data_ordered: 1362 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1363 break; 1364 case Opt_data_writeback: 1365 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1366 break; 1367 case Opt_user_xattr: 1368 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1369 break; 1370 case Opt_nouser_xattr: 1371 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1372 break; 1373 case Opt_atime_quantum: 1374 if (match_int(&args[0], &option)) { 1375 status = 0; 1376 goto bail; 1377 } 1378 if (option >= 0) 1379 mopt->atime_quantum = option; 1380 break; 1381 case Opt_slot: 1382 if (match_int(&args[0], &option)) { 1383 status = 0; 1384 goto bail; 1385 } 1386 if (option) 1387 mopt->slot = (s16)option; 1388 break; 1389 case Opt_commit: 1390 if (match_int(&args[0], &option)) { 1391 status = 0; 1392 goto bail; 1393 } 1394 if (option < 0) 1395 return 0; 1396 if (option == 0) 1397 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1398 mopt->commit_interval = HZ * option; 1399 break; 1400 case Opt_localalloc: 1401 if (match_int(&args[0], &option)) { 1402 status = 0; 1403 goto bail; 1404 } 1405 if (option >= 0) 1406 mopt->localalloc_opt = option; 1407 break; 1408 case Opt_localflocks: 1409 /* 1410 * Changing this during remount could race 1411 * flock() requests, or "unbalance" existing 1412 * ones (e.g., a lock is taken in one mode but 1413 * dropped in the other). If users care enough 1414 * to flip locking modes during remount, we 1415 * could add a "local" flag to individual 1416 * flock structures for proper tracking of 1417 * state. 1418 */ 1419 if (!is_remount) 1420 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1421 break; 1422 case Opt_stack: 1423 /* Check both that the option we were passed 1424 * is of the right length and that it is a proper 1425 * string of the right length. 1426 */ 1427 if (((args[0].to - args[0].from) != 1428 OCFS2_STACK_LABEL_LEN) || 1429 (strnlen(args[0].from, 1430 OCFS2_STACK_LABEL_LEN) != 1431 OCFS2_STACK_LABEL_LEN)) { 1432 mlog(ML_ERROR, 1433 "Invalid cluster_stack option\n"); 1434 status = 0; 1435 goto bail; 1436 } 1437 memcpy(mopt->cluster_stack, args[0].from, 1438 OCFS2_STACK_LABEL_LEN); 1439 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1440 /* 1441 * Open code the memcmp here as we don't have 1442 * an osb to pass to 1443 * ocfs2_userspace_stack(). 1444 */ 1445 if (memcmp(mopt->cluster_stack, 1446 OCFS2_CLASSIC_CLUSTER_STACK, 1447 OCFS2_STACK_LABEL_LEN)) 1448 user_stack = 1; 1449 break; 1450 case Opt_inode64: 1451 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1452 break; 1453 case Opt_usrquota: 1454 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1455 break; 1456 case Opt_grpquota: 1457 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1458 break; 1459 case Opt_coherency_buffered: 1460 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1461 break; 1462 case Opt_coherency_full: 1463 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1464 break; 1465 case Opt_acl: 1466 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1467 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1468 break; 1469 case Opt_noacl: 1470 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1471 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1472 break; 1473 case Opt_resv_level: 1474 if (is_remount) 1475 break; 1476 if (match_int(&args[0], &option)) { 1477 status = 0; 1478 goto bail; 1479 } 1480 if (option >= OCFS2_MIN_RESV_LEVEL && 1481 option < OCFS2_MAX_RESV_LEVEL) 1482 mopt->resv_level = option; 1483 break; 1484 case Opt_dir_resv_level: 1485 if (is_remount) 1486 break; 1487 if (match_int(&args[0], &option)) { 1488 status = 0; 1489 goto bail; 1490 } 1491 if (option >= OCFS2_MIN_RESV_LEVEL && 1492 option < OCFS2_MAX_RESV_LEVEL) 1493 mopt->dir_resv_level = option; 1494 break; 1495 case Opt_journal_async_commit: 1496 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1497 break; 1498 default: 1499 mlog(ML_ERROR, 1500 "Unrecognized mount option \"%s\" " 1501 "or missing value\n", p); 1502 status = 0; 1503 goto bail; 1504 } 1505 } 1506 1507 if (user_stack == 0) { 1508 /* Ensure only one heartbeat mode */ 1509 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1510 OCFS2_MOUNT_HB_GLOBAL | 1511 OCFS2_MOUNT_HB_NONE); 1512 if (hweight32(tmp) != 1) { 1513 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1514 status = 0; 1515 goto bail; 1516 } 1517 } 1518 1519 status = 1; 1520 1521 bail: 1522 return status; 1523 } 1524 1525 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1526 { 1527 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1528 unsigned long opts = osb->s_mount_opt; 1529 unsigned int local_alloc_megs; 1530 1531 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1532 seq_printf(s, ",_netdev"); 1533 if (opts & OCFS2_MOUNT_HB_LOCAL) 1534 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1535 else 1536 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1537 } else 1538 seq_printf(s, ",%s", OCFS2_HB_NONE); 1539 1540 if (opts & OCFS2_MOUNT_NOINTR) 1541 seq_printf(s, ",nointr"); 1542 1543 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1544 seq_printf(s, ",data=writeback"); 1545 else 1546 seq_printf(s, ",data=ordered"); 1547 1548 if (opts & OCFS2_MOUNT_BARRIER) 1549 seq_printf(s, ",barrier=1"); 1550 1551 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1552 seq_printf(s, ",errors=panic"); 1553 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1554 seq_printf(s, ",errors=continue"); 1555 else 1556 seq_printf(s, ",errors=remount-ro"); 1557 1558 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1559 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1560 1561 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1562 1563 if (osb->osb_commit_interval) 1564 seq_printf(s, ",commit=%u", 1565 (unsigned) (osb->osb_commit_interval / HZ)); 1566 1567 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1568 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1569 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1570 1571 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1572 seq_printf(s, ",localflocks,"); 1573 1574 if (osb->osb_cluster_stack[0]) 1575 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1576 OCFS2_STACK_LABEL_LEN); 1577 if (opts & OCFS2_MOUNT_USRQUOTA) 1578 seq_printf(s, ",usrquota"); 1579 if (opts & OCFS2_MOUNT_GRPQUOTA) 1580 seq_printf(s, ",grpquota"); 1581 1582 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1583 seq_printf(s, ",coherency=buffered"); 1584 else 1585 seq_printf(s, ",coherency=full"); 1586 1587 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1588 seq_printf(s, ",nouser_xattr"); 1589 else 1590 seq_printf(s, ",user_xattr"); 1591 1592 if (opts & OCFS2_MOUNT_INODE64) 1593 seq_printf(s, ",inode64"); 1594 1595 if (opts & OCFS2_MOUNT_POSIX_ACL) 1596 seq_printf(s, ",acl"); 1597 else 1598 seq_printf(s, ",noacl"); 1599 1600 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1601 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1602 1603 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1604 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1605 1606 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1607 seq_printf(s, ",journal_async_commit"); 1608 1609 return 0; 1610 } 1611 1612 static int __init ocfs2_init(void) 1613 { 1614 int status; 1615 1616 status = init_ocfs2_uptodate_cache(); 1617 if (status < 0) 1618 goto out1; 1619 1620 status = ocfs2_initialize_mem_caches(); 1621 if (status < 0) 1622 goto out2; 1623 1624 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1625 if (!ocfs2_debugfs_root) { 1626 status = -ENOMEM; 1627 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1628 goto out3; 1629 } 1630 1631 ocfs2_set_locking_protocol(); 1632 1633 status = register_quota_format(&ocfs2_quota_format); 1634 if (status < 0) 1635 goto out3; 1636 status = register_filesystem(&ocfs2_fs_type); 1637 if (!status) 1638 return 0; 1639 1640 unregister_quota_format(&ocfs2_quota_format); 1641 out3: 1642 debugfs_remove(ocfs2_debugfs_root); 1643 ocfs2_free_mem_caches(); 1644 out2: 1645 exit_ocfs2_uptodate_cache(); 1646 out1: 1647 mlog_errno(status); 1648 return status; 1649 } 1650 1651 static void __exit ocfs2_exit(void) 1652 { 1653 unregister_quota_format(&ocfs2_quota_format); 1654 1655 debugfs_remove(ocfs2_debugfs_root); 1656 1657 ocfs2_free_mem_caches(); 1658 1659 unregister_filesystem(&ocfs2_fs_type); 1660 1661 exit_ocfs2_uptodate_cache(); 1662 } 1663 1664 static void ocfs2_put_super(struct super_block *sb) 1665 { 1666 trace_ocfs2_put_super(sb); 1667 1668 ocfs2_sync_blockdev(sb); 1669 ocfs2_dismount_volume(sb, 0); 1670 } 1671 1672 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1673 { 1674 struct ocfs2_super *osb; 1675 u32 numbits, freebits; 1676 int status; 1677 struct ocfs2_dinode *bm_lock; 1678 struct buffer_head *bh = NULL; 1679 struct inode *inode = NULL; 1680 1681 trace_ocfs2_statfs(dentry->d_sb, buf); 1682 1683 osb = OCFS2_SB(dentry->d_sb); 1684 1685 inode = ocfs2_get_system_file_inode(osb, 1686 GLOBAL_BITMAP_SYSTEM_INODE, 1687 OCFS2_INVALID_SLOT); 1688 if (!inode) { 1689 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1690 status = -EIO; 1691 goto bail; 1692 } 1693 1694 status = ocfs2_inode_lock(inode, &bh, 0); 1695 if (status < 0) { 1696 mlog_errno(status); 1697 goto bail; 1698 } 1699 1700 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1701 1702 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1703 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1704 1705 buf->f_type = OCFS2_SUPER_MAGIC; 1706 buf->f_bsize = dentry->d_sb->s_blocksize; 1707 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1708 buf->f_blocks = ((sector_t) numbits) * 1709 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1710 buf->f_bfree = ((sector_t) freebits) * 1711 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1712 buf->f_bavail = buf->f_bfree; 1713 buf->f_files = numbits; 1714 buf->f_ffree = freebits; 1715 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1716 & 0xFFFFFFFFUL; 1717 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1718 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1719 1720 brelse(bh); 1721 1722 ocfs2_inode_unlock(inode, 0); 1723 status = 0; 1724 bail: 1725 iput(inode); 1726 1727 if (status) 1728 mlog_errno(status); 1729 1730 return status; 1731 } 1732 1733 static void ocfs2_inode_init_once(void *data) 1734 { 1735 struct ocfs2_inode_info *oi = data; 1736 1737 oi->ip_flags = 0; 1738 oi->ip_open_count = 0; 1739 spin_lock_init(&oi->ip_lock); 1740 ocfs2_extent_map_init(&oi->vfs_inode); 1741 INIT_LIST_HEAD(&oi->ip_io_markers); 1742 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1743 oi->ip_dir_start_lookup = 0; 1744 init_rwsem(&oi->ip_alloc_sem); 1745 init_rwsem(&oi->ip_xattr_sem); 1746 mutex_init(&oi->ip_io_mutex); 1747 1748 oi->ip_blkno = 0ULL; 1749 oi->ip_clusters = 0; 1750 1751 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1752 1753 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1754 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1755 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1756 1757 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1758 &ocfs2_inode_caching_ops); 1759 1760 inode_init_once(&oi->vfs_inode); 1761 } 1762 1763 static int ocfs2_initialize_mem_caches(void) 1764 { 1765 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1766 sizeof(struct ocfs2_inode_info), 1767 0, 1768 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1769 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1770 ocfs2_inode_init_once); 1771 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1772 sizeof(struct ocfs2_dquot), 1773 0, 1774 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1775 SLAB_MEM_SPREAD), 1776 NULL); 1777 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1778 sizeof(struct ocfs2_quota_chunk), 1779 0, 1780 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1781 NULL); 1782 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1783 !ocfs2_qf_chunk_cachep) { 1784 kmem_cache_destroy(ocfs2_inode_cachep); 1785 kmem_cache_destroy(ocfs2_dquot_cachep); 1786 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1787 return -ENOMEM; 1788 } 1789 1790 return 0; 1791 } 1792 1793 static void ocfs2_free_mem_caches(void) 1794 { 1795 /* 1796 * Make sure all delayed rcu free inodes are flushed before we 1797 * destroy cache. 1798 */ 1799 rcu_barrier(); 1800 kmem_cache_destroy(ocfs2_inode_cachep); 1801 ocfs2_inode_cachep = NULL; 1802 1803 kmem_cache_destroy(ocfs2_dquot_cachep); 1804 ocfs2_dquot_cachep = NULL; 1805 1806 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1807 ocfs2_qf_chunk_cachep = NULL; 1808 } 1809 1810 static int ocfs2_get_sector(struct super_block *sb, 1811 struct buffer_head **bh, 1812 int block, 1813 int sect_size) 1814 { 1815 if (!sb_set_blocksize(sb, sect_size)) { 1816 mlog(ML_ERROR, "unable to set blocksize\n"); 1817 return -EIO; 1818 } 1819 1820 *bh = sb_getblk(sb, block); 1821 if (!*bh) { 1822 mlog_errno(-ENOMEM); 1823 return -ENOMEM; 1824 } 1825 lock_buffer(*bh); 1826 if (!buffer_dirty(*bh)) 1827 clear_buffer_uptodate(*bh); 1828 unlock_buffer(*bh); 1829 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1830 wait_on_buffer(*bh); 1831 if (!buffer_uptodate(*bh)) { 1832 mlog_errno(-EIO); 1833 brelse(*bh); 1834 *bh = NULL; 1835 return -EIO; 1836 } 1837 1838 return 0; 1839 } 1840 1841 static int ocfs2_mount_volume(struct super_block *sb) 1842 { 1843 int status = 0; 1844 int unlock_super = 0; 1845 struct ocfs2_super *osb = OCFS2_SB(sb); 1846 1847 if (ocfs2_is_hard_readonly(osb)) 1848 goto leave; 1849 1850 status = ocfs2_dlm_init(osb); 1851 if (status < 0) { 1852 mlog_errno(status); 1853 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1854 mlog(ML_ERROR, "couldn't mount because cluster name on" 1855 " disk does not match the running cluster name.\n"); 1856 goto leave; 1857 } 1858 1859 status = ocfs2_super_lock(osb, 1); 1860 if (status < 0) { 1861 mlog_errno(status); 1862 goto leave; 1863 } 1864 unlock_super = 1; 1865 1866 /* This will load up the node map and add ourselves to it. */ 1867 status = ocfs2_find_slot(osb); 1868 if (status < 0) { 1869 mlog_errno(status); 1870 goto leave; 1871 } 1872 1873 /* load all node-local system inodes */ 1874 status = ocfs2_init_local_system_inodes(osb); 1875 if (status < 0) { 1876 mlog_errno(status); 1877 goto leave; 1878 } 1879 1880 status = ocfs2_check_volume(osb); 1881 if (status < 0) { 1882 mlog_errno(status); 1883 goto leave; 1884 } 1885 1886 status = ocfs2_truncate_log_init(osb); 1887 if (status < 0) 1888 mlog_errno(status); 1889 1890 leave: 1891 if (unlock_super) 1892 ocfs2_super_unlock(osb, 1); 1893 1894 return status; 1895 } 1896 1897 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1898 { 1899 int tmp, hangup_needed = 0; 1900 struct ocfs2_super *osb = NULL; 1901 char nodestr[12]; 1902 1903 trace_ocfs2_dismount_volume(sb); 1904 1905 BUG_ON(!sb); 1906 osb = OCFS2_SB(sb); 1907 BUG_ON(!osb); 1908 1909 /* Remove file check sysfs related directores/files, 1910 * and wait for the pending file check operations */ 1911 ocfs2_filecheck_remove_sysfs(osb); 1912 1913 kset_unregister(osb->osb_dev_kset); 1914 1915 debugfs_remove(osb->osb_ctxt); 1916 1917 /* Orphan scan should be stopped as early as possible */ 1918 ocfs2_orphan_scan_stop(osb); 1919 1920 ocfs2_disable_quotas(osb); 1921 1922 /* All dquots should be freed by now */ 1923 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1924 /* Wait for worker to be done with the work structure in osb */ 1925 cancel_work_sync(&osb->dquot_drop_work); 1926 1927 ocfs2_shutdown_local_alloc(osb); 1928 1929 ocfs2_truncate_log_shutdown(osb); 1930 1931 /* This will disable recovery and flush any recovery work. */ 1932 ocfs2_recovery_exit(osb); 1933 1934 ocfs2_journal_shutdown(osb); 1935 1936 ocfs2_sync_blockdev(sb); 1937 1938 ocfs2_purge_refcount_trees(osb); 1939 1940 /* No cluster connection means we've failed during mount, so skip 1941 * all the steps which depended on that to complete. */ 1942 if (osb->cconn) { 1943 tmp = ocfs2_super_lock(osb, 1); 1944 if (tmp < 0) { 1945 mlog_errno(tmp); 1946 return; 1947 } 1948 } 1949 1950 if (osb->slot_num != OCFS2_INVALID_SLOT) 1951 ocfs2_put_slot(osb); 1952 1953 if (osb->cconn) 1954 ocfs2_super_unlock(osb, 1); 1955 1956 ocfs2_release_system_inodes(osb); 1957 1958 /* 1959 * If we're dismounting due to mount error, mount.ocfs2 will clean 1960 * up heartbeat. If we're a local mount, there is no heartbeat. 1961 * If we failed before we got a uuid_str yet, we can't stop 1962 * heartbeat. Otherwise, do it. 1963 */ 1964 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1965 !ocfs2_is_hard_readonly(osb)) 1966 hangup_needed = 1; 1967 1968 if (osb->cconn) 1969 ocfs2_dlm_shutdown(osb, hangup_needed); 1970 1971 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1972 debugfs_remove(osb->osb_debug_root); 1973 1974 if (hangup_needed) 1975 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1976 1977 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1978 1979 if (ocfs2_mount_local(osb)) 1980 snprintf(nodestr, sizeof(nodestr), "local"); 1981 else 1982 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1983 1984 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1985 osb->dev_str, nodestr); 1986 1987 ocfs2_delete_osb(osb); 1988 kfree(osb); 1989 sb->s_dev = 0; 1990 sb->s_fs_info = NULL; 1991 } 1992 1993 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1994 unsigned uuid_bytes) 1995 { 1996 int i, ret; 1997 char *ptr; 1998 1999 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2000 2001 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2002 if (osb->uuid_str == NULL) 2003 return -ENOMEM; 2004 2005 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2006 /* print with null */ 2007 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2008 if (ret != 2) /* drop super cleans up */ 2009 return -EINVAL; 2010 /* then only advance past the last char */ 2011 ptr += 2; 2012 } 2013 2014 return 0; 2015 } 2016 2017 /* Make sure entire volume is addressable by our journal. Requires 2018 osb_clusters_at_boot to be valid and for the journal to have been 2019 initialized by ocfs2_journal_init(). */ 2020 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2021 { 2022 int status = 0; 2023 u64 max_block = 2024 ocfs2_clusters_to_blocks(osb->sb, 2025 osb->osb_clusters_at_boot) - 1; 2026 2027 /* 32-bit block number is always OK. */ 2028 if (max_block <= (u32)~0ULL) 2029 goto out; 2030 2031 /* Volume is "huge", so see if our journal is new enough to 2032 support it. */ 2033 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2034 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2035 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2036 JBD2_FEATURE_INCOMPAT_64BIT))) { 2037 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2038 "Enable the 'block64' journal option with tunefs.ocfs2"); 2039 status = -EFBIG; 2040 goto out; 2041 } 2042 2043 out: 2044 return status; 2045 } 2046 2047 static int ocfs2_initialize_super(struct super_block *sb, 2048 struct buffer_head *bh, 2049 int sector_size, 2050 struct ocfs2_blockcheck_stats *stats) 2051 { 2052 int status; 2053 int i, cbits, bbits; 2054 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2055 struct inode *inode = NULL; 2056 struct ocfs2_journal *journal; 2057 struct ocfs2_super *osb; 2058 u64 total_blocks; 2059 2060 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2061 if (!osb) { 2062 status = -ENOMEM; 2063 mlog_errno(status); 2064 goto bail; 2065 } 2066 2067 sb->s_fs_info = osb; 2068 sb->s_op = &ocfs2_sops; 2069 sb->s_d_op = &ocfs2_dentry_ops; 2070 sb->s_export_op = &ocfs2_export_ops; 2071 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2072 sb->dq_op = &ocfs2_quota_operations; 2073 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2074 sb->s_xattr = ocfs2_xattr_handlers; 2075 sb->s_time_gran = 1; 2076 sb->s_flags |= SB_NOATIME; 2077 /* this is needed to support O_LARGEFILE */ 2078 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2079 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2080 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2081 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid, 2082 sizeof(di->id2.i_super.s_uuid)); 2083 2084 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2085 2086 for (i = 0; i < 3; i++) 2087 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2088 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2089 2090 osb->sb = sb; 2091 osb->s_sectsize_bits = blksize_bits(sector_size); 2092 BUG_ON(!osb->s_sectsize_bits); 2093 2094 spin_lock_init(&osb->dc_task_lock); 2095 init_waitqueue_head(&osb->dc_event); 2096 osb->dc_work_sequence = 0; 2097 osb->dc_wake_sequence = 0; 2098 INIT_LIST_HEAD(&osb->blocked_lock_list); 2099 osb->blocked_lock_count = 0; 2100 spin_lock_init(&osb->osb_lock); 2101 spin_lock_init(&osb->osb_xattr_lock); 2102 ocfs2_init_steal_slots(osb); 2103 2104 mutex_init(&osb->system_file_mutex); 2105 2106 atomic_set(&osb->alloc_stats.moves, 0); 2107 atomic_set(&osb->alloc_stats.local_data, 0); 2108 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2109 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2110 atomic_set(&osb->alloc_stats.bg_extends, 0); 2111 2112 /* Copy the blockcheck stats from the superblock probe */ 2113 osb->osb_ecc_stats = *stats; 2114 2115 ocfs2_init_node_maps(osb); 2116 2117 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2118 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2119 2120 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2121 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2122 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2123 osb->max_slots); 2124 status = -EINVAL; 2125 goto bail; 2126 } 2127 2128 ocfs2_orphan_scan_init(osb); 2129 2130 status = ocfs2_recovery_init(osb); 2131 if (status) { 2132 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2133 mlog_errno(status); 2134 goto bail; 2135 } 2136 2137 init_waitqueue_head(&osb->checkpoint_event); 2138 2139 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2140 2141 osb->slot_num = OCFS2_INVALID_SLOT; 2142 2143 osb->s_xattr_inline_size = le16_to_cpu( 2144 di->id2.i_super.s_xattr_inline_size); 2145 2146 osb->local_alloc_state = OCFS2_LA_UNUSED; 2147 osb->local_alloc_bh = NULL; 2148 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2149 2150 init_waitqueue_head(&osb->osb_mount_event); 2151 2152 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2153 if (status) { 2154 mlog_errno(status); 2155 goto bail; 2156 } 2157 2158 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2159 if (!osb->vol_label) { 2160 mlog(ML_ERROR, "unable to alloc vol label\n"); 2161 status = -ENOMEM; 2162 goto bail; 2163 } 2164 2165 osb->slot_recovery_generations = 2166 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2167 GFP_KERNEL); 2168 if (!osb->slot_recovery_generations) { 2169 status = -ENOMEM; 2170 mlog_errno(status); 2171 goto bail; 2172 } 2173 2174 init_waitqueue_head(&osb->osb_wipe_event); 2175 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2176 sizeof(*osb->osb_orphan_wipes), 2177 GFP_KERNEL); 2178 if (!osb->osb_orphan_wipes) { 2179 status = -ENOMEM; 2180 mlog_errno(status); 2181 goto bail; 2182 } 2183 2184 osb->osb_rf_lock_tree = RB_ROOT; 2185 2186 osb->s_feature_compat = 2187 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2188 osb->s_feature_ro_compat = 2189 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2190 osb->s_feature_incompat = 2191 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2192 2193 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2194 mlog(ML_ERROR, "couldn't mount because of unsupported " 2195 "optional features (%x).\n", i); 2196 status = -EINVAL; 2197 goto bail; 2198 } 2199 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2200 mlog(ML_ERROR, "couldn't mount RDWR because of " 2201 "unsupported optional features (%x).\n", i); 2202 status = -EINVAL; 2203 goto bail; 2204 } 2205 2206 if (ocfs2_clusterinfo_valid(osb)) { 2207 osb->osb_stackflags = 2208 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2209 strlcpy(osb->osb_cluster_stack, 2210 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2211 OCFS2_STACK_LABEL_LEN + 1); 2212 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2213 mlog(ML_ERROR, 2214 "couldn't mount because of an invalid " 2215 "cluster stack label (%s) \n", 2216 osb->osb_cluster_stack); 2217 status = -EINVAL; 2218 goto bail; 2219 } 2220 strlcpy(osb->osb_cluster_name, 2221 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2222 OCFS2_CLUSTER_NAME_LEN + 1); 2223 } else { 2224 /* The empty string is identical with classic tools that 2225 * don't know about s_cluster_info. */ 2226 osb->osb_cluster_stack[0] = '\0'; 2227 } 2228 2229 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2230 2231 /* FIXME 2232 * This should be done in ocfs2_journal_init(), but unknown 2233 * ordering issues will cause the filesystem to crash. 2234 * If anyone wants to figure out what part of the code 2235 * refers to osb->journal before ocfs2_journal_init() is run, 2236 * be my guest. 2237 */ 2238 /* initialize our journal structure */ 2239 2240 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2241 if (!journal) { 2242 mlog(ML_ERROR, "unable to alloc journal\n"); 2243 status = -ENOMEM; 2244 goto bail; 2245 } 2246 osb->journal = journal; 2247 journal->j_osb = osb; 2248 2249 atomic_set(&journal->j_num_trans, 0); 2250 init_rwsem(&journal->j_trans_barrier); 2251 init_waitqueue_head(&journal->j_checkpointed); 2252 spin_lock_init(&journal->j_lock); 2253 journal->j_trans_id = (unsigned long) 1; 2254 INIT_LIST_HEAD(&journal->j_la_cleanups); 2255 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2256 journal->j_state = OCFS2_JOURNAL_FREE; 2257 2258 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2259 init_llist_head(&osb->dquot_drop_list); 2260 2261 /* get some pseudo constants for clustersize bits */ 2262 osb->s_clustersize_bits = 2263 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2264 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2265 2266 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2267 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2268 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2269 osb->s_clustersize); 2270 status = -EINVAL; 2271 goto bail; 2272 } 2273 2274 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2275 le32_to_cpu(di->i_clusters)); 2276 2277 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2278 total_blocks); 2279 if (status) { 2280 mlog(ML_ERROR, "Volume too large " 2281 "to mount safely on this system"); 2282 status = -EFBIG; 2283 goto bail; 2284 } 2285 2286 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2287 sizeof(di->id2.i_super.s_uuid))) { 2288 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2289 status = -ENOMEM; 2290 goto bail; 2291 } 2292 2293 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2294 OCFS2_MAX_VOL_LABEL_LEN); 2295 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2296 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2297 osb->first_cluster_group_blkno = 2298 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2299 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2300 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2301 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2302 (unsigned long long)osb->root_blkno, 2303 (unsigned long long)osb->system_dir_blkno, 2304 osb->s_clustersize_bits); 2305 2306 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2307 if (!osb->osb_dlm_debug) { 2308 status = -ENOMEM; 2309 mlog_errno(status); 2310 goto bail; 2311 } 2312 2313 atomic_set(&osb->vol_state, VOLUME_INIT); 2314 2315 /* load root, system_dir, and all global system inodes */ 2316 status = ocfs2_init_global_system_inodes(osb); 2317 if (status < 0) { 2318 mlog_errno(status); 2319 goto bail; 2320 } 2321 2322 /* 2323 * global bitmap 2324 */ 2325 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2326 OCFS2_INVALID_SLOT); 2327 if (!inode) { 2328 status = -EINVAL; 2329 mlog_errno(status); 2330 goto bail; 2331 } 2332 2333 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2334 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2335 iput(inode); 2336 2337 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2338 osb->s_feature_incompat) * 8; 2339 2340 status = ocfs2_init_slot_info(osb); 2341 if (status < 0) { 2342 mlog_errno(status); 2343 goto bail; 2344 } 2345 cleancache_init_shared_fs(sb); 2346 2347 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2348 if (!osb->ocfs2_wq) { 2349 status = -ENOMEM; 2350 mlog_errno(status); 2351 } 2352 2353 bail: 2354 return status; 2355 } 2356 2357 /* 2358 * will return: -EAGAIN if it is ok to keep searching for superblocks 2359 * -EINVAL if there is a bad superblock 2360 * 0 on success 2361 */ 2362 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2363 struct buffer_head *bh, 2364 u32 blksz, 2365 struct ocfs2_blockcheck_stats *stats) 2366 { 2367 int status = -EAGAIN; 2368 2369 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2370 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2371 /* We have to do a raw check of the feature here */ 2372 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2373 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2374 status = ocfs2_block_check_validate(bh->b_data, 2375 bh->b_size, 2376 &di->i_check, 2377 stats); 2378 if (status) 2379 goto out; 2380 } 2381 status = -EINVAL; 2382 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2383 mlog(ML_ERROR, "found superblock with incorrect block " 2384 "size: found %u, should be %u\n", 2385 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2386 blksz); 2387 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2388 OCFS2_MAJOR_REV_LEVEL || 2389 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2390 OCFS2_MINOR_REV_LEVEL) { 2391 mlog(ML_ERROR, "found superblock with bad version: " 2392 "found %u.%u, should be %u.%u\n", 2393 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2394 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2395 OCFS2_MAJOR_REV_LEVEL, 2396 OCFS2_MINOR_REV_LEVEL); 2397 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2398 mlog(ML_ERROR, "bad block number on superblock: " 2399 "found %llu, should be %llu\n", 2400 (unsigned long long)le64_to_cpu(di->i_blkno), 2401 (unsigned long long)bh->b_blocknr); 2402 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2403 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2404 mlog(ML_ERROR, "bad cluster size found: %u\n", 2405 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2406 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2407 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2408 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2409 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2410 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2411 mlog(ML_ERROR, 2412 "Superblock slots found greater than file system " 2413 "maximum: found %u, max %u\n", 2414 le16_to_cpu(di->id2.i_super.s_max_slots), 2415 OCFS2_MAX_SLOTS); 2416 } else { 2417 /* found it! */ 2418 status = 0; 2419 } 2420 } 2421 2422 out: 2423 if (status && status != -EAGAIN) 2424 mlog_errno(status); 2425 return status; 2426 } 2427 2428 static int ocfs2_check_volume(struct ocfs2_super *osb) 2429 { 2430 int status; 2431 int dirty; 2432 int local; 2433 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2434 * recover 2435 * ourselves. */ 2436 2437 /* Init our journal object. */ 2438 status = ocfs2_journal_init(osb->journal, &dirty); 2439 if (status < 0) { 2440 mlog(ML_ERROR, "Could not initialize journal!\n"); 2441 goto finally; 2442 } 2443 2444 /* Now that journal has been initialized, check to make sure 2445 entire volume is addressable. */ 2446 status = ocfs2_journal_addressable(osb); 2447 if (status) 2448 goto finally; 2449 2450 /* If the journal was unmounted cleanly then we don't want to 2451 * recover anything. Otherwise, journal_load will do that 2452 * dirty work for us :) */ 2453 if (!dirty) { 2454 status = ocfs2_journal_wipe(osb->journal, 0); 2455 if (status < 0) { 2456 mlog_errno(status); 2457 goto finally; 2458 } 2459 } else { 2460 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2461 "unmounted cleanly, recovering it.\n", osb->dev_str); 2462 } 2463 2464 local = ocfs2_mount_local(osb); 2465 2466 /* will play back anything left in the journal. */ 2467 status = ocfs2_journal_load(osb->journal, local, dirty); 2468 if (status < 0) { 2469 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2470 goto finally; 2471 } 2472 2473 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2474 jbd2_journal_set_features(osb->journal->j_journal, 2475 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2476 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2477 else 2478 jbd2_journal_clear_features(osb->journal->j_journal, 2479 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2480 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2481 2482 if (dirty) { 2483 /* recover my local alloc if we didn't unmount cleanly. */ 2484 status = ocfs2_begin_local_alloc_recovery(osb, 2485 osb->slot_num, 2486 &local_alloc); 2487 if (status < 0) { 2488 mlog_errno(status); 2489 goto finally; 2490 } 2491 /* we complete the recovery process after we've marked 2492 * ourselves as mounted. */ 2493 } 2494 2495 status = ocfs2_load_local_alloc(osb); 2496 if (status < 0) { 2497 mlog_errno(status); 2498 goto finally; 2499 } 2500 2501 if (dirty) { 2502 /* Recovery will be completed after we've mounted the 2503 * rest of the volume. */ 2504 osb->local_alloc_copy = local_alloc; 2505 local_alloc = NULL; 2506 } 2507 2508 /* go through each journal, trylock it and if you get the 2509 * lock, and it's marked as dirty, set the bit in the recover 2510 * map and launch a recovery thread for it. */ 2511 status = ocfs2_mark_dead_nodes(osb); 2512 if (status < 0) { 2513 mlog_errno(status); 2514 goto finally; 2515 } 2516 2517 status = ocfs2_compute_replay_slots(osb); 2518 if (status < 0) 2519 mlog_errno(status); 2520 2521 finally: 2522 kfree(local_alloc); 2523 2524 if (status) 2525 mlog_errno(status); 2526 return status; 2527 } 2528 2529 /* 2530 * The routine gets called from dismount or close whenever a dismount on 2531 * volume is requested and the osb open count becomes 1. 2532 * It will remove the osb from the global list and also free up all the 2533 * initialized resources and fileobject. 2534 */ 2535 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2536 { 2537 /* This function assumes that the caller has the main osb resource */ 2538 2539 /* ocfs2_initializer_super have already created this workqueue */ 2540 if (osb->ocfs2_wq) 2541 destroy_workqueue(osb->ocfs2_wq); 2542 2543 ocfs2_free_slot_info(osb); 2544 2545 kfree(osb->osb_orphan_wipes); 2546 kfree(osb->slot_recovery_generations); 2547 /* FIXME 2548 * This belongs in journal shutdown, but because we have to 2549 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2550 * we free it here. 2551 */ 2552 kfree(osb->journal); 2553 kfree(osb->local_alloc_copy); 2554 kfree(osb->uuid_str); 2555 kfree(osb->vol_label); 2556 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2557 memset(osb, 0, sizeof(struct ocfs2_super)); 2558 } 2559 2560 /* Depending on the mount option passed, perform one of the following: 2561 * Put OCFS2 into a readonly state (default) 2562 * Return EIO so that only the process errs 2563 * Fix the error as if fsck.ocfs2 -y 2564 * panic 2565 */ 2566 static int ocfs2_handle_error(struct super_block *sb) 2567 { 2568 struct ocfs2_super *osb = OCFS2_SB(sb); 2569 int rv = 0; 2570 2571 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2572 pr_crit("On-disk corruption discovered. " 2573 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2574 2575 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2576 panic("OCFS2: (device %s): panic forced after error\n", 2577 sb->s_id); 2578 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2579 pr_crit("OCFS2: Returning error to the calling process.\n"); 2580 rv = -EIO; 2581 } else { /* default option */ 2582 rv = -EROFS; 2583 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb))) 2584 return rv; 2585 2586 pr_crit("OCFS2: File system is now read-only.\n"); 2587 sb->s_flags |= SB_RDONLY; 2588 ocfs2_set_ro_flag(osb, 0); 2589 } 2590 2591 return rv; 2592 } 2593 2594 int __ocfs2_error(struct super_block *sb, const char *function, 2595 const char *fmt, ...) 2596 { 2597 struct va_format vaf; 2598 va_list args; 2599 2600 va_start(args, fmt); 2601 vaf.fmt = fmt; 2602 vaf.va = &args; 2603 2604 /* Not using mlog here because we want to show the actual 2605 * function the error came from. */ 2606 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2607 sb->s_id, function, &vaf); 2608 2609 va_end(args); 2610 2611 return ocfs2_handle_error(sb); 2612 } 2613 2614 /* Handle critical errors. This is intentionally more drastic than 2615 * ocfs2_handle_error, so we only use for things like journal errors, 2616 * etc. */ 2617 void __ocfs2_abort(struct super_block *sb, const char *function, 2618 const char *fmt, ...) 2619 { 2620 struct va_format vaf; 2621 va_list args; 2622 2623 va_start(args, fmt); 2624 2625 vaf.fmt = fmt; 2626 vaf.va = &args; 2627 2628 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2629 sb->s_id, function, &vaf); 2630 2631 va_end(args); 2632 2633 /* We don't have the cluster support yet to go straight to 2634 * hard readonly in here. Until then, we want to keep 2635 * ocfs2_abort() so that we can at least mark critical 2636 * errors. 2637 * 2638 * TODO: This should abort the journal and alert other nodes 2639 * that our slot needs recovery. */ 2640 2641 /* Force a panic(). This stinks, but it's better than letting 2642 * things continue without having a proper hard readonly 2643 * here. */ 2644 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2645 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2646 ocfs2_handle_error(sb); 2647 } 2648 2649 /* 2650 * Void signal blockers, because in-kernel sigprocmask() only fails 2651 * when SIG_* is wrong. 2652 */ 2653 void ocfs2_block_signals(sigset_t *oldset) 2654 { 2655 int rc; 2656 sigset_t blocked; 2657 2658 sigfillset(&blocked); 2659 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2660 BUG_ON(rc); 2661 } 2662 2663 void ocfs2_unblock_signals(sigset_t *oldset) 2664 { 2665 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2666 BUG_ON(rc); 2667 } 2668 2669 module_init(ocfs2_init); 2670 module_exit(ocfs2_exit); 2671