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 46 #define CREATE_TRACE_POINTS 47 #include "ocfs2_trace.h" 48 49 #include <cluster/masklog.h> 50 51 #include "ocfs2.h" 52 53 /* this should be the only file to include a version 1 header */ 54 #include "ocfs1_fs_compat.h" 55 56 #include "alloc.h" 57 #include "aops.h" 58 #include "blockcheck.h" 59 #include "dlmglue.h" 60 #include "export.h" 61 #include "extent_map.h" 62 #include "heartbeat.h" 63 #include "inode.h" 64 #include "journal.h" 65 #include "localalloc.h" 66 #include "namei.h" 67 #include "slot_map.h" 68 #include "super.h" 69 #include "sysfile.h" 70 #include "uptodate.h" 71 #include "xattr.h" 72 #include "quota.h" 73 #include "refcounttree.h" 74 #include "suballoc.h" 75 76 #include "buffer_head_io.h" 77 78 static struct kmem_cache *ocfs2_inode_cachep; 79 struct kmem_cache *ocfs2_dquot_cachep; 80 struct kmem_cache *ocfs2_qf_chunk_cachep; 81 82 /* OCFS2 needs to schedule several different types of work which 83 * require cluster locking, disk I/O, recovery waits, etc. Since these 84 * types of work tend to be heavy we avoid using the kernel events 85 * workqueue and schedule on our own. */ 86 struct workqueue_struct *ocfs2_wq = NULL; 87 88 static struct dentry *ocfs2_debugfs_root; 89 90 MODULE_AUTHOR("Oracle"); 91 MODULE_LICENSE("GPL"); 92 MODULE_DESCRIPTION("OCFS2 cluster file system"); 93 94 struct mount_options 95 { 96 unsigned long commit_interval; 97 unsigned long mount_opt; 98 unsigned int atime_quantum; 99 signed short slot; 100 int localalloc_opt; 101 unsigned int resv_level; 102 int dir_resv_level; 103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 104 }; 105 106 static int ocfs2_parse_options(struct super_block *sb, char *options, 107 struct mount_options *mopt, 108 int is_remount); 109 static int ocfs2_check_set_options(struct super_block *sb, 110 struct mount_options *options); 111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 112 static void ocfs2_put_super(struct super_block *sb); 113 static int ocfs2_mount_volume(struct super_block *sb); 114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 116 static int ocfs2_initialize_mem_caches(void); 117 static void ocfs2_free_mem_caches(void); 118 static void ocfs2_delete_osb(struct ocfs2_super *osb); 119 120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 121 122 static int ocfs2_sync_fs(struct super_block *sb, int wait); 123 124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 127 static int ocfs2_check_volume(struct ocfs2_super *osb); 128 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 129 struct buffer_head *bh, 130 u32 sectsize, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_initialize_super(struct super_block *sb, 133 struct buffer_head *bh, 134 int sector_size, 135 struct ocfs2_blockcheck_stats *stats); 136 static int ocfs2_get_sector(struct super_block *sb, 137 struct buffer_head **bh, 138 int block, 139 int sect_size); 140 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 141 static void ocfs2_destroy_inode(struct inode *inode); 142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 143 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 144 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 145 146 static struct dquot **ocfs2_get_dquots(struct inode *inode) 147 { 148 return OCFS2_I(inode)->i_dquot; 149 } 150 151 static const struct super_operations ocfs2_sops = { 152 .statfs = ocfs2_statfs, 153 .alloc_inode = ocfs2_alloc_inode, 154 .destroy_inode = ocfs2_destroy_inode, 155 .drop_inode = ocfs2_drop_inode, 156 .evict_inode = ocfs2_evict_inode, 157 .sync_fs = ocfs2_sync_fs, 158 .put_super = ocfs2_put_super, 159 .remount_fs = ocfs2_remount, 160 .show_options = ocfs2_show_options, 161 .quota_read = ocfs2_quota_read, 162 .quota_write = ocfs2_quota_write, 163 .get_dquots = ocfs2_get_dquots, 164 }; 165 166 enum { 167 Opt_barrier, 168 Opt_err_panic, 169 Opt_err_ro, 170 Opt_intr, 171 Opt_nointr, 172 Opt_hb_none, 173 Opt_hb_local, 174 Opt_hb_global, 175 Opt_data_ordered, 176 Opt_data_writeback, 177 Opt_atime_quantum, 178 Opt_slot, 179 Opt_commit, 180 Opt_localalloc, 181 Opt_localflocks, 182 Opt_stack, 183 Opt_user_xattr, 184 Opt_nouser_xattr, 185 Opt_inode64, 186 Opt_acl, 187 Opt_noacl, 188 Opt_usrquota, 189 Opt_grpquota, 190 Opt_coherency_buffered, 191 Opt_coherency_full, 192 Opt_resv_level, 193 Opt_dir_resv_level, 194 Opt_journal_async_commit, 195 Opt_err, 196 }; 197 198 static const match_table_t tokens = { 199 {Opt_barrier, "barrier=%u"}, 200 {Opt_err_panic, "errors=panic"}, 201 {Opt_err_ro, "errors=remount-ro"}, 202 {Opt_intr, "intr"}, 203 {Opt_nointr, "nointr"}, 204 {Opt_hb_none, OCFS2_HB_NONE}, 205 {Opt_hb_local, OCFS2_HB_LOCAL}, 206 {Opt_hb_global, OCFS2_HB_GLOBAL}, 207 {Opt_data_ordered, "data=ordered"}, 208 {Opt_data_writeback, "data=writeback"}, 209 {Opt_atime_quantum, "atime_quantum=%u"}, 210 {Opt_slot, "preferred_slot=%u"}, 211 {Opt_commit, "commit=%u"}, 212 {Opt_localalloc, "localalloc=%d"}, 213 {Opt_localflocks, "localflocks"}, 214 {Opt_stack, "cluster_stack=%s"}, 215 {Opt_user_xattr, "user_xattr"}, 216 {Opt_nouser_xattr, "nouser_xattr"}, 217 {Opt_inode64, "inode64"}, 218 {Opt_acl, "acl"}, 219 {Opt_noacl, "noacl"}, 220 {Opt_usrquota, "usrquota"}, 221 {Opt_grpquota, "grpquota"}, 222 {Opt_coherency_buffered, "coherency=buffered"}, 223 {Opt_coherency_full, "coherency=full"}, 224 {Opt_resv_level, "resv_level=%u"}, 225 {Opt_dir_resv_level, "dir_resv_level=%u"}, 226 {Opt_journal_async_commit, "journal_async_commit"}, 227 {Opt_err, NULL} 228 }; 229 230 #ifdef CONFIG_DEBUG_FS 231 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 232 { 233 struct ocfs2_cluster_connection *cconn = osb->cconn; 234 struct ocfs2_recovery_map *rm = osb->recovery_map; 235 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 236 int i, out = 0; 237 238 out += snprintf(buf + out, len - out, 239 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 240 "Device", osb->dev_str, osb->uuid_str, 241 osb->fs_generation, osb->vol_label); 242 243 out += snprintf(buf + out, len - out, 244 "%10s => State: %d Flags: 0x%lX\n", "Volume", 245 atomic_read(&osb->vol_state), osb->osb_flags); 246 247 out += snprintf(buf + out, len - out, 248 "%10s => Block: %lu Cluster: %d\n", "Sizes", 249 osb->sb->s_blocksize, osb->s_clustersize); 250 251 out += snprintf(buf + out, len - out, 252 "%10s => Compat: 0x%X Incompat: 0x%X " 253 "ROcompat: 0x%X\n", 254 "Features", osb->s_feature_compat, 255 osb->s_feature_incompat, osb->s_feature_ro_compat); 256 257 out += snprintf(buf + out, len - out, 258 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 259 osb->s_mount_opt, osb->s_atime_quantum); 260 261 if (cconn) { 262 out += snprintf(buf + out, len - out, 263 "%10s => Stack: %s Name: %*s " 264 "Version: %d.%d\n", "Cluster", 265 (*osb->osb_cluster_stack == '\0' ? 266 "o2cb" : osb->osb_cluster_stack), 267 cconn->cc_namelen, cconn->cc_name, 268 cconn->cc_version.pv_major, 269 cconn->cc_version.pv_minor); 270 } 271 272 spin_lock(&osb->dc_task_lock); 273 out += snprintf(buf + out, len - out, 274 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 275 "WorkSeq: %lu\n", "DownCnvt", 276 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 277 osb->blocked_lock_count, osb->dc_wake_sequence, 278 osb->dc_work_sequence); 279 spin_unlock(&osb->dc_task_lock); 280 281 spin_lock(&osb->osb_lock); 282 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 283 "Recovery", 284 (osb->recovery_thread_task ? 285 task_pid_nr(osb->recovery_thread_task) : -1)); 286 if (rm->rm_used == 0) 287 out += snprintf(buf + out, len - out, " None\n"); 288 else { 289 for (i = 0; i < rm->rm_used; i++) 290 out += snprintf(buf + out, len - out, " %d", 291 rm->rm_entries[i]); 292 out += snprintf(buf + out, len - out, "\n"); 293 } 294 spin_unlock(&osb->osb_lock); 295 296 out += snprintf(buf + out, len - out, 297 "%10s => Pid: %d Interval: %lu\n", "Commit", 298 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 299 osb->osb_commit_interval); 300 301 out += snprintf(buf + out, len - out, 302 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 303 "Journal", osb->journal->j_state, 304 osb->journal->j_trans_id, 305 atomic_read(&osb->journal->j_num_trans)); 306 307 out += snprintf(buf + out, len - out, 308 "%10s => GlobalAllocs: %d LocalAllocs: %d " 309 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 310 "Stats", 311 atomic_read(&osb->alloc_stats.bitmap_data), 312 atomic_read(&osb->alloc_stats.local_data), 313 atomic_read(&osb->alloc_stats.bg_allocs), 314 atomic_read(&osb->alloc_stats.moves), 315 atomic_read(&osb->alloc_stats.bg_extends)); 316 317 out += snprintf(buf + out, len - out, 318 "%10s => State: %u Descriptor: %llu Size: %u bits " 319 "Default: %u bits\n", 320 "LocalAlloc", osb->local_alloc_state, 321 (unsigned long long)osb->la_last_gd, 322 osb->local_alloc_bits, osb->local_alloc_default_bits); 323 324 spin_lock(&osb->osb_lock); 325 out += snprintf(buf + out, len - out, 326 "%10s => InodeSlot: %d StolenInodes: %d, " 327 "MetaSlot: %d StolenMeta: %d\n", "Steal", 328 osb->s_inode_steal_slot, 329 atomic_read(&osb->s_num_inodes_stolen), 330 osb->s_meta_steal_slot, 331 atomic_read(&osb->s_num_meta_stolen)); 332 spin_unlock(&osb->osb_lock); 333 334 out += snprintf(buf + out, len - out, "OrphanScan => "); 335 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 336 os->os_count, os->os_seqno); 337 out += snprintf(buf + out, len - out, " Last Scan: "); 338 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 339 out += snprintf(buf + out, len - out, "Disabled\n"); 340 else 341 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 342 (get_seconds() - os->os_scantime.tv_sec)); 343 344 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 345 "Slots", "Num", "RecoGen"); 346 for (i = 0; i < osb->max_slots; ++i) { 347 out += snprintf(buf + out, len - out, 348 "%10s %c %3d %10d\n", 349 " ", 350 (i == osb->slot_num ? '*' : ' '), 351 i, osb->slot_recovery_generations[i]); 352 } 353 354 return out; 355 } 356 357 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 358 { 359 struct ocfs2_super *osb = inode->i_private; 360 char *buf = NULL; 361 362 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 363 if (!buf) 364 goto bail; 365 366 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 367 368 file->private_data = buf; 369 370 return 0; 371 bail: 372 return -ENOMEM; 373 } 374 375 static int ocfs2_debug_release(struct inode *inode, struct file *file) 376 { 377 kfree(file->private_data); 378 return 0; 379 } 380 381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 382 size_t nbytes, loff_t *ppos) 383 { 384 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 385 i_size_read(file->f_mapping->host)); 386 } 387 #else 388 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 389 { 390 return 0; 391 } 392 static int ocfs2_debug_release(struct inode *inode, struct file *file) 393 { 394 return 0; 395 } 396 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 397 size_t nbytes, loff_t *ppos) 398 { 399 return 0; 400 } 401 #endif /* CONFIG_DEBUG_FS */ 402 403 static const struct file_operations ocfs2_osb_debug_fops = { 404 .open = ocfs2_osb_debug_open, 405 .release = ocfs2_debug_release, 406 .read = ocfs2_debug_read, 407 .llseek = generic_file_llseek, 408 }; 409 410 static int ocfs2_sync_fs(struct super_block *sb, int wait) 411 { 412 int status; 413 tid_t target; 414 struct ocfs2_super *osb = OCFS2_SB(sb); 415 416 if (ocfs2_is_hard_readonly(osb)) 417 return -EROFS; 418 419 if (wait) { 420 status = ocfs2_flush_truncate_log(osb); 421 if (status < 0) 422 mlog_errno(status); 423 } else { 424 ocfs2_schedule_truncate_log_flush(osb, 0); 425 } 426 427 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 428 &target)) { 429 if (wait) 430 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 431 target); 432 } 433 return 0; 434 } 435 436 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 437 { 438 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 439 && (ino == USER_QUOTA_SYSTEM_INODE 440 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 441 return 0; 442 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 443 && (ino == GROUP_QUOTA_SYSTEM_INODE 444 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 445 return 0; 446 return 1; 447 } 448 449 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 450 { 451 struct inode *new = NULL; 452 int status = 0; 453 int i; 454 455 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 456 if (IS_ERR(new)) { 457 status = PTR_ERR(new); 458 mlog_errno(status); 459 goto bail; 460 } 461 osb->root_inode = new; 462 463 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 464 if (IS_ERR(new)) { 465 status = PTR_ERR(new); 466 mlog_errno(status); 467 goto bail; 468 } 469 osb->sys_root_inode = new; 470 471 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 472 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 473 if (!ocfs2_need_system_inode(osb, i)) 474 continue; 475 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 476 if (!new) { 477 ocfs2_release_system_inodes(osb); 478 status = -EINVAL; 479 mlog_errno(status); 480 /* FIXME: Should ERROR_RO_FS */ 481 mlog(ML_ERROR, "Unable to load system inode %d, " 482 "possibly corrupt fs?", i); 483 goto bail; 484 } 485 // the array now has one ref, so drop this one 486 iput(new); 487 } 488 489 bail: 490 if (status) 491 mlog_errno(status); 492 return status; 493 } 494 495 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 496 { 497 struct inode *new = NULL; 498 int status = 0; 499 int i; 500 501 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 502 i < NUM_SYSTEM_INODES; 503 i++) { 504 if (!ocfs2_need_system_inode(osb, i)) 505 continue; 506 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 507 if (!new) { 508 ocfs2_release_system_inodes(osb); 509 status = -EINVAL; 510 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 511 status, i, osb->slot_num); 512 goto bail; 513 } 514 /* the array now has one ref, so drop this one */ 515 iput(new); 516 } 517 518 bail: 519 if (status) 520 mlog_errno(status); 521 return status; 522 } 523 524 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 525 { 526 int i; 527 struct inode *inode; 528 529 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 530 inode = osb->global_system_inodes[i]; 531 if (inode) { 532 iput(inode); 533 osb->global_system_inodes[i] = NULL; 534 } 535 } 536 537 inode = osb->sys_root_inode; 538 if (inode) { 539 iput(inode); 540 osb->sys_root_inode = NULL; 541 } 542 543 inode = osb->root_inode; 544 if (inode) { 545 iput(inode); 546 osb->root_inode = NULL; 547 } 548 549 if (!osb->local_system_inodes) 550 return; 551 552 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 553 if (osb->local_system_inodes[i]) { 554 iput(osb->local_system_inodes[i]); 555 osb->local_system_inodes[i] = NULL; 556 } 557 } 558 559 kfree(osb->local_system_inodes); 560 osb->local_system_inodes = NULL; 561 } 562 563 /* We're allocating fs objects, use GFP_NOFS */ 564 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 565 { 566 struct ocfs2_inode_info *oi; 567 568 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 569 if (!oi) 570 return NULL; 571 572 oi->i_sync_tid = 0; 573 oi->i_datasync_tid = 0; 574 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 575 576 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 577 return &oi->vfs_inode; 578 } 579 580 static void ocfs2_i_callback(struct rcu_head *head) 581 { 582 struct inode *inode = container_of(head, struct inode, i_rcu); 583 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 584 } 585 586 static void ocfs2_destroy_inode(struct inode *inode) 587 { 588 call_rcu(&inode->i_rcu, ocfs2_i_callback); 589 } 590 591 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 592 unsigned int cbits) 593 { 594 unsigned int bytes = 1 << cbits; 595 unsigned int trim = bytes; 596 unsigned int bitshift = 32; 597 598 /* 599 * i_size and all block offsets in ocfs2 are always 64 bits 600 * wide. i_clusters is 32 bits, in cluster-sized units. So on 601 * 64 bit platforms, cluster size will be the limiting factor. 602 */ 603 604 #if BITS_PER_LONG == 32 605 # if defined(CONFIG_LBDAF) 606 BUILD_BUG_ON(sizeof(sector_t) != 8); 607 /* 608 * We might be limited by page cache size. 609 */ 610 if (bytes > PAGE_CACHE_SIZE) { 611 bytes = PAGE_CACHE_SIZE; 612 trim = 1; 613 /* 614 * Shift by 31 here so that we don't get larger than 615 * MAX_LFS_FILESIZE 616 */ 617 bitshift = 31; 618 } 619 # else 620 /* 621 * We are limited by the size of sector_t. Use block size, as 622 * that's what we expose to the VFS. 623 */ 624 bytes = 1 << bbits; 625 trim = 1; 626 bitshift = 31; 627 # endif 628 #endif 629 630 /* 631 * Trim by a whole cluster when we can actually approach the 632 * on-disk limits. Otherwise we can overflow i_clusters when 633 * an extent start is at the max offset. 634 */ 635 return (((unsigned long long)bytes) << bitshift) - trim; 636 } 637 638 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 639 { 640 int incompat_features; 641 int ret = 0; 642 struct mount_options parsed_options; 643 struct ocfs2_super *osb = OCFS2_SB(sb); 644 u32 tmp; 645 646 sync_filesystem(sb); 647 648 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 649 !ocfs2_check_set_options(sb, &parsed_options)) { 650 ret = -EINVAL; 651 goto out; 652 } 653 654 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 655 OCFS2_MOUNT_HB_NONE; 656 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 657 ret = -EINVAL; 658 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 659 goto out; 660 } 661 662 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 663 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 664 ret = -EINVAL; 665 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 666 goto out; 667 } 668 669 /* Probably don't want this on remount; it might 670 * mess with other nodes */ 671 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 672 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 673 ret = -EINVAL; 674 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 675 goto out; 676 } 677 678 /* We're going to/from readonly mode. */ 679 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 680 /* Disable quota accounting before remounting RO */ 681 if (*flags & MS_RDONLY) { 682 ret = ocfs2_susp_quotas(osb, 0); 683 if (ret < 0) 684 goto out; 685 } 686 /* Lock here so the check of HARD_RO and the potential 687 * setting of SOFT_RO is atomic. */ 688 spin_lock(&osb->osb_lock); 689 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 690 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 691 ret = -EROFS; 692 goto unlock_osb; 693 } 694 695 if (*flags & MS_RDONLY) { 696 sb->s_flags |= MS_RDONLY; 697 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 698 } else { 699 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 700 mlog(ML_ERROR, "Cannot remount RDWR " 701 "filesystem due to previous errors.\n"); 702 ret = -EROFS; 703 goto unlock_osb; 704 } 705 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 706 if (incompat_features) { 707 mlog(ML_ERROR, "Cannot remount RDWR because " 708 "of unsupported optional features " 709 "(%x).\n", incompat_features); 710 ret = -EINVAL; 711 goto unlock_osb; 712 } 713 sb->s_flags &= ~MS_RDONLY; 714 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 715 } 716 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 717 unlock_osb: 718 spin_unlock(&osb->osb_lock); 719 /* Enable quota accounting after remounting RW */ 720 if (!ret && !(*flags & MS_RDONLY)) { 721 if (sb_any_quota_suspended(sb)) 722 ret = ocfs2_susp_quotas(osb, 1); 723 else 724 ret = ocfs2_enable_quotas(osb); 725 if (ret < 0) { 726 /* Return back changes... */ 727 spin_lock(&osb->osb_lock); 728 sb->s_flags |= MS_RDONLY; 729 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 730 spin_unlock(&osb->osb_lock); 731 goto out; 732 } 733 } 734 } 735 736 if (!ret) { 737 /* Only save off the new mount options in case of a successful 738 * remount. */ 739 osb->s_mount_opt = parsed_options.mount_opt; 740 osb->s_atime_quantum = parsed_options.atime_quantum; 741 osb->preferred_slot = parsed_options.slot; 742 if (parsed_options.commit_interval) 743 osb->osb_commit_interval = parsed_options.commit_interval; 744 745 if (!ocfs2_is_hard_readonly(osb)) 746 ocfs2_set_journal_params(osb); 747 748 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 749 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 750 MS_POSIXACL : 0); 751 } 752 out: 753 return ret; 754 } 755 756 static int ocfs2_sb_probe(struct super_block *sb, 757 struct buffer_head **bh, 758 int *sector_size, 759 struct ocfs2_blockcheck_stats *stats) 760 { 761 int status, tmpstat; 762 struct ocfs1_vol_disk_hdr *hdr; 763 struct ocfs2_dinode *di; 764 int blksize; 765 766 *bh = NULL; 767 768 /* may be > 512 */ 769 *sector_size = bdev_logical_block_size(sb->s_bdev); 770 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 771 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 772 *sector_size, OCFS2_MAX_BLOCKSIZE); 773 status = -EINVAL; 774 goto bail; 775 } 776 777 /* Can this really happen? */ 778 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 779 *sector_size = OCFS2_MIN_BLOCKSIZE; 780 781 /* check block zero for old format */ 782 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 783 if (status < 0) { 784 mlog_errno(status); 785 goto bail; 786 } 787 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 788 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 789 mlog(ML_ERROR, "incompatible version: %u.%u\n", 790 hdr->major_version, hdr->minor_version); 791 status = -EINVAL; 792 } 793 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 794 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 795 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 796 hdr->signature); 797 status = -EINVAL; 798 } 799 brelse(*bh); 800 *bh = NULL; 801 if (status < 0) { 802 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 803 "upgraded before mounting with ocfs v2\n"); 804 goto bail; 805 } 806 807 /* 808 * Now check at magic offset for 512, 1024, 2048, 4096 809 * blocksizes. 4096 is the maximum blocksize because it is 810 * the minimum clustersize. 811 */ 812 status = -EINVAL; 813 for (blksize = *sector_size; 814 blksize <= OCFS2_MAX_BLOCKSIZE; 815 blksize <<= 1) { 816 tmpstat = ocfs2_get_sector(sb, bh, 817 OCFS2_SUPER_BLOCK_BLKNO, 818 blksize); 819 if (tmpstat < 0) { 820 status = tmpstat; 821 mlog_errno(status); 822 break; 823 } 824 di = (struct ocfs2_dinode *) (*bh)->b_data; 825 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 826 spin_lock_init(&stats->b_lock); 827 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 828 if (tmpstat < 0) { 829 brelse(*bh); 830 *bh = NULL; 831 } 832 if (tmpstat != -EAGAIN) { 833 status = tmpstat; 834 break; 835 } 836 } 837 838 bail: 839 return status; 840 } 841 842 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 843 { 844 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 845 846 if (osb->s_mount_opt & hb_enabled) { 847 if (ocfs2_mount_local(osb)) { 848 mlog(ML_ERROR, "Cannot heartbeat on a locally " 849 "mounted device.\n"); 850 return -EINVAL; 851 } 852 if (ocfs2_userspace_stack(osb)) { 853 mlog(ML_ERROR, "Userspace stack expected, but " 854 "o2cb heartbeat arguments passed to mount\n"); 855 return -EINVAL; 856 } 857 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 858 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 859 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 860 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 861 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 862 return -EINVAL; 863 } 864 } 865 866 if (!(osb->s_mount_opt & hb_enabled)) { 867 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 868 !ocfs2_userspace_stack(osb)) { 869 mlog(ML_ERROR, "Heartbeat has to be started to mount " 870 "a read-write clustered device.\n"); 871 return -EINVAL; 872 } 873 } 874 875 return 0; 876 } 877 878 /* 879 * If we're using a userspace stack, mount should have passed 880 * a name that matches the disk. If not, mount should not 881 * have passed a stack. 882 */ 883 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 884 struct mount_options *mopt) 885 { 886 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 887 mlog(ML_ERROR, 888 "cluster stack passed to mount, but this filesystem " 889 "does not support it\n"); 890 return -EINVAL; 891 } 892 893 if (ocfs2_userspace_stack(osb) && 894 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 895 OCFS2_STACK_LABEL_LEN)) { 896 mlog(ML_ERROR, 897 "cluster stack passed to mount (\"%s\") does not " 898 "match the filesystem (\"%s\")\n", 899 mopt->cluster_stack, 900 osb->osb_cluster_stack); 901 return -EINVAL; 902 } 903 904 return 0; 905 } 906 907 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 908 { 909 int type; 910 struct super_block *sb = osb->sb; 911 unsigned int feature[OCFS2_MAXQUOTAS] = { 912 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 913 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 914 int status = 0; 915 916 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 917 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 918 continue; 919 if (unsuspend) 920 status = dquot_resume(sb, type); 921 else { 922 struct ocfs2_mem_dqinfo *oinfo; 923 924 /* Cancel periodic syncing before suspending */ 925 oinfo = sb_dqinfo(sb, type)->dqi_priv; 926 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 927 status = dquot_suspend(sb, type); 928 } 929 if (status < 0) 930 break; 931 } 932 if (status < 0) 933 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 934 "remount (error = %d).\n", status); 935 return status; 936 } 937 938 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 939 { 940 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 941 struct super_block *sb = osb->sb; 942 unsigned int feature[OCFS2_MAXQUOTAS] = { 943 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 944 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 945 unsigned int ino[OCFS2_MAXQUOTAS] = { 946 LOCAL_USER_QUOTA_SYSTEM_INODE, 947 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 948 int status; 949 int type; 950 951 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 952 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 953 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 954 continue; 955 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 956 osb->slot_num); 957 if (!inode[type]) { 958 status = -ENOENT; 959 goto out_quota_off; 960 } 961 status = dquot_enable(inode[type], type, QFMT_OCFS2, 962 DQUOT_USAGE_ENABLED); 963 if (status < 0) 964 goto out_quota_off; 965 } 966 967 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 968 iput(inode[type]); 969 return 0; 970 out_quota_off: 971 ocfs2_disable_quotas(osb); 972 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 973 iput(inode[type]); 974 mlog_errno(status); 975 return status; 976 } 977 978 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 979 { 980 int type; 981 struct inode *inode; 982 struct super_block *sb = osb->sb; 983 struct ocfs2_mem_dqinfo *oinfo; 984 985 /* We mostly ignore errors in this function because there's not much 986 * we can do when we see them */ 987 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 988 if (!sb_has_quota_loaded(sb, type)) 989 continue; 990 /* Cancel periodic syncing before we grab dqonoff_mutex */ 991 oinfo = sb_dqinfo(sb, type)->dqi_priv; 992 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 993 inode = igrab(sb->s_dquot.files[type]); 994 /* Turn off quotas. This will remove all dquot structures from 995 * memory and so they will be automatically synced to global 996 * quota files */ 997 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 998 DQUOT_LIMITS_ENABLED); 999 if (!inode) 1000 continue; 1001 iput(inode); 1002 } 1003 } 1004 1005 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1006 { 1007 struct dentry *root; 1008 int status, sector_size; 1009 struct mount_options parsed_options; 1010 struct inode *inode = NULL; 1011 struct ocfs2_super *osb = NULL; 1012 struct buffer_head *bh = NULL; 1013 char nodestr[12]; 1014 struct ocfs2_blockcheck_stats stats; 1015 1016 trace_ocfs2_fill_super(sb, data, silent); 1017 1018 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1019 status = -EINVAL; 1020 goto read_super_error; 1021 } 1022 1023 /* probe for superblock */ 1024 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1025 if (status < 0) { 1026 mlog(ML_ERROR, "superblock probe failed!\n"); 1027 goto read_super_error; 1028 } 1029 1030 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1031 osb = OCFS2_SB(sb); 1032 if (status < 0) { 1033 mlog_errno(status); 1034 goto read_super_error; 1035 } 1036 brelse(bh); 1037 bh = NULL; 1038 1039 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1040 status = -EINVAL; 1041 goto read_super_error; 1042 } 1043 osb->s_mount_opt = parsed_options.mount_opt; 1044 osb->s_atime_quantum = parsed_options.atime_quantum; 1045 osb->preferred_slot = parsed_options.slot; 1046 osb->osb_commit_interval = parsed_options.commit_interval; 1047 1048 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1049 osb->osb_resv_level = parsed_options.resv_level; 1050 osb->osb_dir_resv_level = parsed_options.resv_level; 1051 if (parsed_options.dir_resv_level == -1) 1052 osb->osb_dir_resv_level = parsed_options.resv_level; 1053 else 1054 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1055 1056 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1057 if (status) 1058 goto read_super_error; 1059 1060 sb->s_magic = OCFS2_SUPER_MAGIC; 1061 1062 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1063 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1064 1065 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1066 * heartbeat=none */ 1067 if (bdev_read_only(sb->s_bdev)) { 1068 if (!(sb->s_flags & MS_RDONLY)) { 1069 status = -EACCES; 1070 mlog(ML_ERROR, "Readonly device detected but readonly " 1071 "mount was not specified.\n"); 1072 goto read_super_error; 1073 } 1074 1075 /* You should not be able to start a local heartbeat 1076 * on a readonly device. */ 1077 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1078 status = -EROFS; 1079 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1080 "device.\n"); 1081 goto read_super_error; 1082 } 1083 1084 status = ocfs2_check_journals_nolocks(osb); 1085 if (status < 0) { 1086 if (status == -EROFS) 1087 mlog(ML_ERROR, "Recovery required on readonly " 1088 "file system, but write access is " 1089 "unavailable.\n"); 1090 else 1091 mlog_errno(status); 1092 goto read_super_error; 1093 } 1094 1095 ocfs2_set_ro_flag(osb, 1); 1096 1097 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1098 "Cluster services will not be used for this mount. " 1099 "Recovery will be skipped.\n", osb->dev_str); 1100 } 1101 1102 if (!ocfs2_is_hard_readonly(osb)) { 1103 if (sb->s_flags & MS_RDONLY) 1104 ocfs2_set_ro_flag(osb, 0); 1105 } 1106 1107 status = ocfs2_verify_heartbeat(osb); 1108 if (status < 0) { 1109 mlog_errno(status); 1110 goto read_super_error; 1111 } 1112 1113 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1114 ocfs2_debugfs_root); 1115 if (!osb->osb_debug_root) { 1116 status = -EINVAL; 1117 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1118 goto read_super_error; 1119 } 1120 1121 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1122 osb->osb_debug_root, 1123 osb, 1124 &ocfs2_osb_debug_fops); 1125 if (!osb->osb_ctxt) { 1126 status = -EINVAL; 1127 mlog_errno(status); 1128 goto read_super_error; 1129 } 1130 1131 if (ocfs2_meta_ecc(osb)) { 1132 status = ocfs2_blockcheck_stats_debugfs_install( 1133 &osb->osb_ecc_stats, 1134 osb->osb_debug_root); 1135 if (status) { 1136 mlog(ML_ERROR, 1137 "Unable to create blockcheck statistics " 1138 "files\n"); 1139 goto read_super_error; 1140 } 1141 } 1142 1143 status = ocfs2_mount_volume(sb); 1144 if (status < 0) 1145 goto read_super_error; 1146 1147 if (osb->root_inode) 1148 inode = igrab(osb->root_inode); 1149 1150 if (!inode) { 1151 status = -EIO; 1152 mlog_errno(status); 1153 goto read_super_error; 1154 } 1155 1156 root = d_make_root(inode); 1157 if (!root) { 1158 status = -ENOMEM; 1159 mlog_errno(status); 1160 goto read_super_error; 1161 } 1162 1163 sb->s_root = root; 1164 1165 ocfs2_complete_mount_recovery(osb); 1166 1167 if (ocfs2_mount_local(osb)) 1168 snprintf(nodestr, sizeof(nodestr), "local"); 1169 else 1170 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1171 1172 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1173 "with %s data mode.\n", 1174 osb->dev_str, nodestr, osb->slot_num, 1175 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1176 "ordered"); 1177 1178 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1179 wake_up(&osb->osb_mount_event); 1180 1181 /* Now we can initialize quotas because we can afford to wait 1182 * for cluster locks recovery now. That also means that truncation 1183 * log recovery can happen but that waits for proper quota setup */ 1184 if (!(sb->s_flags & MS_RDONLY)) { 1185 status = ocfs2_enable_quotas(osb); 1186 if (status < 0) { 1187 /* We have to err-out specially here because 1188 * s_root is already set */ 1189 mlog_errno(status); 1190 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1191 wake_up(&osb->osb_mount_event); 1192 return status; 1193 } 1194 } 1195 1196 ocfs2_complete_quota_recovery(osb); 1197 1198 /* Now we wake up again for processes waiting for quotas */ 1199 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1200 wake_up(&osb->osb_mount_event); 1201 1202 /* Start this when the mount is almost sure of being successful */ 1203 ocfs2_orphan_scan_start(osb); 1204 1205 return status; 1206 1207 read_super_error: 1208 brelse(bh); 1209 1210 if (osb) { 1211 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1212 wake_up(&osb->osb_mount_event); 1213 ocfs2_dismount_volume(sb, 1); 1214 } 1215 1216 if (status) 1217 mlog_errno(status); 1218 return status; 1219 } 1220 1221 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1222 int flags, 1223 const char *dev_name, 1224 void *data) 1225 { 1226 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1227 } 1228 1229 static struct file_system_type ocfs2_fs_type = { 1230 .owner = THIS_MODULE, 1231 .name = "ocfs2", 1232 .mount = ocfs2_mount, 1233 .kill_sb = kill_block_super, 1234 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1235 .next = NULL 1236 }; 1237 MODULE_ALIAS_FS("ocfs2"); 1238 1239 static int ocfs2_check_set_options(struct super_block *sb, 1240 struct mount_options *options) 1241 { 1242 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1243 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1244 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1245 mlog(ML_ERROR, "User quotas were requested, but this " 1246 "filesystem does not have the feature enabled.\n"); 1247 return 0; 1248 } 1249 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1250 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1251 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1252 mlog(ML_ERROR, "Group quotas were requested, but this " 1253 "filesystem does not have the feature enabled.\n"); 1254 return 0; 1255 } 1256 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1257 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1258 mlog(ML_ERROR, "ACL support requested but extended attributes " 1259 "feature is not enabled\n"); 1260 return 0; 1261 } 1262 /* No ACL setting specified? Use XATTR feature... */ 1263 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1264 OCFS2_MOUNT_NO_POSIX_ACL))) { 1265 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1266 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1267 else 1268 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1269 } 1270 return 1; 1271 } 1272 1273 static int ocfs2_parse_options(struct super_block *sb, 1274 char *options, 1275 struct mount_options *mopt, 1276 int is_remount) 1277 { 1278 int status, user_stack = 0; 1279 char *p; 1280 u32 tmp; 1281 1282 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1283 1284 mopt->commit_interval = 0; 1285 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1286 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1287 mopt->slot = OCFS2_INVALID_SLOT; 1288 mopt->localalloc_opt = -1; 1289 mopt->cluster_stack[0] = '\0'; 1290 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1291 mopt->dir_resv_level = -1; 1292 1293 if (!options) { 1294 status = 1; 1295 goto bail; 1296 } 1297 1298 while ((p = strsep(&options, ",")) != NULL) { 1299 int token, option; 1300 substring_t args[MAX_OPT_ARGS]; 1301 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_PANIC; 1334 break; 1335 case Opt_err_ro: 1336 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1337 break; 1338 case Opt_data_ordered: 1339 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1340 break; 1341 case Opt_data_writeback: 1342 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1343 break; 1344 case Opt_user_xattr: 1345 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1346 break; 1347 case Opt_nouser_xattr: 1348 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1349 break; 1350 case Opt_atime_quantum: 1351 if (match_int(&args[0], &option)) { 1352 status = 0; 1353 goto bail; 1354 } 1355 if (option >= 0) 1356 mopt->atime_quantum = option; 1357 break; 1358 case Opt_slot: 1359 option = 0; 1360 if (match_int(&args[0], &option)) { 1361 status = 0; 1362 goto bail; 1363 } 1364 if (option) 1365 mopt->slot = (s16)option; 1366 break; 1367 case Opt_commit: 1368 option = 0; 1369 if (match_int(&args[0], &option)) { 1370 status = 0; 1371 goto bail; 1372 } 1373 if (option < 0) 1374 return 0; 1375 if (option == 0) 1376 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1377 mopt->commit_interval = HZ * option; 1378 break; 1379 case Opt_localalloc: 1380 option = 0; 1381 if (match_int(&args[0], &option)) { 1382 status = 0; 1383 goto bail; 1384 } 1385 if (option >= 0) 1386 mopt->localalloc_opt = option; 1387 break; 1388 case Opt_localflocks: 1389 /* 1390 * Changing this during remount could race 1391 * flock() requests, or "unbalance" existing 1392 * ones (e.g., a lock is taken in one mode but 1393 * dropped in the other). If users care enough 1394 * to flip locking modes during remount, we 1395 * could add a "local" flag to individual 1396 * flock structures for proper tracking of 1397 * state. 1398 */ 1399 if (!is_remount) 1400 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1401 break; 1402 case Opt_stack: 1403 /* Check both that the option we were passed 1404 * is of the right length and that it is a proper 1405 * string of the right length. 1406 */ 1407 if (((args[0].to - args[0].from) != 1408 OCFS2_STACK_LABEL_LEN) || 1409 (strnlen(args[0].from, 1410 OCFS2_STACK_LABEL_LEN) != 1411 OCFS2_STACK_LABEL_LEN)) { 1412 mlog(ML_ERROR, 1413 "Invalid cluster_stack option\n"); 1414 status = 0; 1415 goto bail; 1416 } 1417 memcpy(mopt->cluster_stack, args[0].from, 1418 OCFS2_STACK_LABEL_LEN); 1419 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1420 /* 1421 * Open code the memcmp here as we don't have 1422 * an osb to pass to 1423 * ocfs2_userspace_stack(). 1424 */ 1425 if (memcmp(mopt->cluster_stack, 1426 OCFS2_CLASSIC_CLUSTER_STACK, 1427 OCFS2_STACK_LABEL_LEN)) 1428 user_stack = 1; 1429 break; 1430 case Opt_inode64: 1431 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1432 break; 1433 case Opt_usrquota: 1434 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1435 break; 1436 case Opt_grpquota: 1437 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1438 break; 1439 case Opt_coherency_buffered: 1440 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1441 break; 1442 case Opt_coherency_full: 1443 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1444 break; 1445 case Opt_acl: 1446 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1447 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1448 break; 1449 case Opt_noacl: 1450 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1451 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1452 break; 1453 case Opt_resv_level: 1454 if (is_remount) 1455 break; 1456 if (match_int(&args[0], &option)) { 1457 status = 0; 1458 goto bail; 1459 } 1460 if (option >= OCFS2_MIN_RESV_LEVEL && 1461 option < OCFS2_MAX_RESV_LEVEL) 1462 mopt->resv_level = option; 1463 break; 1464 case Opt_dir_resv_level: 1465 if (is_remount) 1466 break; 1467 if (match_int(&args[0], &option)) { 1468 status = 0; 1469 goto bail; 1470 } 1471 if (option >= OCFS2_MIN_RESV_LEVEL && 1472 option < OCFS2_MAX_RESV_LEVEL) 1473 mopt->dir_resv_level = option; 1474 break; 1475 case Opt_journal_async_commit: 1476 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1477 break; 1478 default: 1479 mlog(ML_ERROR, 1480 "Unrecognized mount option \"%s\" " 1481 "or missing value\n", p); 1482 status = 0; 1483 goto bail; 1484 } 1485 } 1486 1487 if (user_stack == 0) { 1488 /* Ensure only one heartbeat mode */ 1489 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1490 OCFS2_MOUNT_HB_GLOBAL | 1491 OCFS2_MOUNT_HB_NONE); 1492 if (hweight32(tmp) != 1) { 1493 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1494 status = 0; 1495 goto bail; 1496 } 1497 } 1498 1499 status = 1; 1500 1501 bail: 1502 return status; 1503 } 1504 1505 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1506 { 1507 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1508 unsigned long opts = osb->s_mount_opt; 1509 unsigned int local_alloc_megs; 1510 1511 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1512 seq_printf(s, ",_netdev"); 1513 if (opts & OCFS2_MOUNT_HB_LOCAL) 1514 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1515 else 1516 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1517 } else 1518 seq_printf(s, ",%s", OCFS2_HB_NONE); 1519 1520 if (opts & OCFS2_MOUNT_NOINTR) 1521 seq_printf(s, ",nointr"); 1522 1523 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1524 seq_printf(s, ",data=writeback"); 1525 else 1526 seq_printf(s, ",data=ordered"); 1527 1528 if (opts & OCFS2_MOUNT_BARRIER) 1529 seq_printf(s, ",barrier=1"); 1530 1531 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1532 seq_printf(s, ",errors=panic"); 1533 else 1534 seq_printf(s, ",errors=remount-ro"); 1535 1536 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1537 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1538 1539 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1540 1541 if (osb->osb_commit_interval) 1542 seq_printf(s, ",commit=%u", 1543 (unsigned) (osb->osb_commit_interval / HZ)); 1544 1545 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1546 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1547 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1548 1549 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1550 seq_printf(s, ",localflocks,"); 1551 1552 if (osb->osb_cluster_stack[0]) 1553 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1554 osb->osb_cluster_stack); 1555 if (opts & OCFS2_MOUNT_USRQUOTA) 1556 seq_printf(s, ",usrquota"); 1557 if (opts & OCFS2_MOUNT_GRPQUOTA) 1558 seq_printf(s, ",grpquota"); 1559 1560 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1561 seq_printf(s, ",coherency=buffered"); 1562 else 1563 seq_printf(s, ",coherency=full"); 1564 1565 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1566 seq_printf(s, ",nouser_xattr"); 1567 else 1568 seq_printf(s, ",user_xattr"); 1569 1570 if (opts & OCFS2_MOUNT_INODE64) 1571 seq_printf(s, ",inode64"); 1572 1573 if (opts & OCFS2_MOUNT_POSIX_ACL) 1574 seq_printf(s, ",acl"); 1575 else 1576 seq_printf(s, ",noacl"); 1577 1578 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1579 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1580 1581 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1582 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1583 1584 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1585 seq_printf(s, ",journal_async_commit"); 1586 1587 return 0; 1588 } 1589 1590 static int __init ocfs2_init(void) 1591 { 1592 int status; 1593 1594 status = init_ocfs2_uptodate_cache(); 1595 if (status < 0) 1596 goto out1; 1597 1598 status = ocfs2_initialize_mem_caches(); 1599 if (status < 0) 1600 goto out2; 1601 1602 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1603 if (!ocfs2_wq) { 1604 status = -ENOMEM; 1605 goto out3; 1606 } 1607 1608 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1609 if (!ocfs2_debugfs_root) { 1610 status = -ENOMEM; 1611 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1612 goto out4; 1613 } 1614 1615 ocfs2_set_locking_protocol(); 1616 1617 status = register_quota_format(&ocfs2_quota_format); 1618 if (status < 0) 1619 goto out4; 1620 status = register_filesystem(&ocfs2_fs_type); 1621 if (!status) 1622 return 0; 1623 1624 unregister_quota_format(&ocfs2_quota_format); 1625 out4: 1626 destroy_workqueue(ocfs2_wq); 1627 debugfs_remove(ocfs2_debugfs_root); 1628 out3: 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 if (ocfs2_wq) { 1640 flush_workqueue(ocfs2_wq); 1641 destroy_workqueue(ocfs2_wq); 1642 } 1643 1644 unregister_quota_format(&ocfs2_quota_format); 1645 1646 debugfs_remove(ocfs2_debugfs_root); 1647 1648 ocfs2_free_mem_caches(); 1649 1650 unregister_filesystem(&ocfs2_fs_type); 1651 1652 exit_ocfs2_uptodate_cache(); 1653 } 1654 1655 static void ocfs2_put_super(struct super_block *sb) 1656 { 1657 trace_ocfs2_put_super(sb); 1658 1659 ocfs2_sync_blockdev(sb); 1660 ocfs2_dismount_volume(sb, 0); 1661 } 1662 1663 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1664 { 1665 struct ocfs2_super *osb; 1666 u32 numbits, freebits; 1667 int status; 1668 struct ocfs2_dinode *bm_lock; 1669 struct buffer_head *bh = NULL; 1670 struct inode *inode = NULL; 1671 1672 trace_ocfs2_statfs(dentry->d_sb, buf); 1673 1674 osb = OCFS2_SB(dentry->d_sb); 1675 1676 inode = ocfs2_get_system_file_inode(osb, 1677 GLOBAL_BITMAP_SYSTEM_INODE, 1678 OCFS2_INVALID_SLOT); 1679 if (!inode) { 1680 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1681 status = -EIO; 1682 goto bail; 1683 } 1684 1685 status = ocfs2_inode_lock(inode, &bh, 0); 1686 if (status < 0) { 1687 mlog_errno(status); 1688 goto bail; 1689 } 1690 1691 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1692 1693 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1694 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1695 1696 buf->f_type = OCFS2_SUPER_MAGIC; 1697 buf->f_bsize = dentry->d_sb->s_blocksize; 1698 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1699 buf->f_blocks = ((sector_t) numbits) * 1700 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1701 buf->f_bfree = ((sector_t) freebits) * 1702 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1703 buf->f_bavail = buf->f_bfree; 1704 buf->f_files = numbits; 1705 buf->f_ffree = freebits; 1706 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1707 & 0xFFFFFFFFUL; 1708 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1709 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1710 1711 brelse(bh); 1712 1713 ocfs2_inode_unlock(inode, 0); 1714 status = 0; 1715 bail: 1716 if (inode) 1717 iput(inode); 1718 1719 if (status) 1720 mlog_errno(status); 1721 1722 return status; 1723 } 1724 1725 static void ocfs2_inode_init_once(void *data) 1726 { 1727 struct ocfs2_inode_info *oi = data; 1728 1729 oi->ip_flags = 0; 1730 oi->ip_open_count = 0; 1731 spin_lock_init(&oi->ip_lock); 1732 ocfs2_extent_map_init(&oi->vfs_inode); 1733 INIT_LIST_HEAD(&oi->ip_io_markers); 1734 oi->ip_dir_start_lookup = 0; 1735 mutex_init(&oi->ip_unaligned_aio); 1736 init_rwsem(&oi->ip_alloc_sem); 1737 init_rwsem(&oi->ip_xattr_sem); 1738 mutex_init(&oi->ip_io_mutex); 1739 1740 oi->ip_blkno = 0ULL; 1741 oi->ip_clusters = 0; 1742 1743 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1744 1745 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1746 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1747 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1748 1749 init_waitqueue_head(&oi->append_dio_wq); 1750 1751 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1752 &ocfs2_inode_caching_ops); 1753 1754 inode_init_once(&oi->vfs_inode); 1755 } 1756 1757 static int ocfs2_initialize_mem_caches(void) 1758 { 1759 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1760 sizeof(struct ocfs2_inode_info), 1761 0, 1762 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1763 SLAB_MEM_SPREAD), 1764 ocfs2_inode_init_once); 1765 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1766 sizeof(struct ocfs2_dquot), 1767 0, 1768 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1769 SLAB_MEM_SPREAD), 1770 NULL); 1771 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1772 sizeof(struct ocfs2_quota_chunk), 1773 0, 1774 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1775 NULL); 1776 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1777 !ocfs2_qf_chunk_cachep) { 1778 if (ocfs2_inode_cachep) 1779 kmem_cache_destroy(ocfs2_inode_cachep); 1780 if (ocfs2_dquot_cachep) 1781 kmem_cache_destroy(ocfs2_dquot_cachep); 1782 if (ocfs2_qf_chunk_cachep) 1783 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1784 return -ENOMEM; 1785 } 1786 1787 return 0; 1788 } 1789 1790 static void ocfs2_free_mem_caches(void) 1791 { 1792 /* 1793 * Make sure all delayed rcu free inodes are flushed before we 1794 * destroy cache. 1795 */ 1796 rcu_barrier(); 1797 if (ocfs2_inode_cachep) 1798 kmem_cache_destroy(ocfs2_inode_cachep); 1799 ocfs2_inode_cachep = NULL; 1800 1801 if (ocfs2_dquot_cachep) 1802 kmem_cache_destroy(ocfs2_dquot_cachep); 1803 ocfs2_dquot_cachep = NULL; 1804 1805 if (ocfs2_qf_chunk_cachep) 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(READ, 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 goto leave; 1854 } 1855 1856 status = ocfs2_super_lock(osb, 1); 1857 if (status < 0) { 1858 mlog_errno(status); 1859 goto leave; 1860 } 1861 unlock_super = 1; 1862 1863 /* This will load up the node map and add ourselves to it. */ 1864 status = ocfs2_find_slot(osb); 1865 if (status < 0) { 1866 mlog_errno(status); 1867 goto leave; 1868 } 1869 1870 /* load all node-local system inodes */ 1871 status = ocfs2_init_local_system_inodes(osb); 1872 if (status < 0) { 1873 mlog_errno(status); 1874 goto leave; 1875 } 1876 1877 status = ocfs2_check_volume(osb); 1878 if (status < 0) { 1879 mlog_errno(status); 1880 goto leave; 1881 } 1882 1883 status = ocfs2_truncate_log_init(osb); 1884 if (status < 0) 1885 mlog_errno(status); 1886 1887 leave: 1888 if (unlock_super) 1889 ocfs2_super_unlock(osb, 1); 1890 1891 return status; 1892 } 1893 1894 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1895 { 1896 int tmp, hangup_needed = 0; 1897 struct ocfs2_super *osb = NULL; 1898 char nodestr[12]; 1899 1900 trace_ocfs2_dismount_volume(sb); 1901 1902 BUG_ON(!sb); 1903 osb = OCFS2_SB(sb); 1904 BUG_ON(!osb); 1905 1906 debugfs_remove(osb->osb_ctxt); 1907 1908 /* Orphan scan should be stopped as early as possible */ 1909 ocfs2_orphan_scan_stop(osb); 1910 1911 ocfs2_disable_quotas(osb); 1912 1913 /* All dquots should be freed by now */ 1914 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1915 /* Wait for worker to be done with the work structure in osb */ 1916 cancel_work_sync(&osb->dquot_drop_work); 1917 1918 ocfs2_shutdown_local_alloc(osb); 1919 1920 ocfs2_truncate_log_shutdown(osb); 1921 1922 /* This will disable recovery and flush any recovery work. */ 1923 ocfs2_recovery_exit(osb); 1924 1925 ocfs2_journal_shutdown(osb); 1926 1927 ocfs2_sync_blockdev(sb); 1928 1929 ocfs2_purge_refcount_trees(osb); 1930 1931 /* No cluster connection means we've failed during mount, so skip 1932 * all the steps which depended on that to complete. */ 1933 if (osb->cconn) { 1934 tmp = ocfs2_super_lock(osb, 1); 1935 if (tmp < 0) { 1936 mlog_errno(tmp); 1937 return; 1938 } 1939 } 1940 1941 if (osb->slot_num != OCFS2_INVALID_SLOT) 1942 ocfs2_put_slot(osb); 1943 1944 if (osb->cconn) 1945 ocfs2_super_unlock(osb, 1); 1946 1947 ocfs2_release_system_inodes(osb); 1948 1949 /* 1950 * If we're dismounting due to mount error, mount.ocfs2 will clean 1951 * up heartbeat. If we're a local mount, there is no heartbeat. 1952 * If we failed before we got a uuid_str yet, we can't stop 1953 * heartbeat. Otherwise, do it. 1954 */ 1955 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1956 !ocfs2_is_hard_readonly(osb)) 1957 hangup_needed = 1; 1958 1959 if (osb->cconn) 1960 ocfs2_dlm_shutdown(osb, hangup_needed); 1961 1962 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1963 debugfs_remove(osb->osb_debug_root); 1964 1965 if (hangup_needed) 1966 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1967 1968 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1969 1970 if (ocfs2_mount_local(osb)) 1971 snprintf(nodestr, sizeof(nodestr), "local"); 1972 else 1973 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1974 1975 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1976 osb->dev_str, nodestr); 1977 1978 ocfs2_delete_osb(osb); 1979 kfree(osb); 1980 sb->s_dev = 0; 1981 sb->s_fs_info = NULL; 1982 } 1983 1984 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1985 unsigned uuid_bytes) 1986 { 1987 int i, ret; 1988 char *ptr; 1989 1990 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1991 1992 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1993 if (osb->uuid_str == NULL) 1994 return -ENOMEM; 1995 1996 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1997 /* print with null */ 1998 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1999 if (ret != 2) /* drop super cleans up */ 2000 return -EINVAL; 2001 /* then only advance past the last char */ 2002 ptr += 2; 2003 } 2004 2005 return 0; 2006 } 2007 2008 /* Make sure entire volume is addressable by our journal. Requires 2009 osb_clusters_at_boot to be valid and for the journal to have been 2010 initialized by ocfs2_journal_init(). */ 2011 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2012 { 2013 int status = 0; 2014 u64 max_block = 2015 ocfs2_clusters_to_blocks(osb->sb, 2016 osb->osb_clusters_at_boot) - 1; 2017 2018 /* 32-bit block number is always OK. */ 2019 if (max_block <= (u32)~0ULL) 2020 goto out; 2021 2022 /* Volume is "huge", so see if our journal is new enough to 2023 support it. */ 2024 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2025 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2026 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2027 JBD2_FEATURE_INCOMPAT_64BIT))) { 2028 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2029 "Enable the 'block64' journal option with tunefs.ocfs2"); 2030 status = -EFBIG; 2031 goto out; 2032 } 2033 2034 out: 2035 return status; 2036 } 2037 2038 static int ocfs2_initialize_super(struct super_block *sb, 2039 struct buffer_head *bh, 2040 int sector_size, 2041 struct ocfs2_blockcheck_stats *stats) 2042 { 2043 int status; 2044 int i, cbits, bbits; 2045 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2046 struct inode *inode = NULL; 2047 struct ocfs2_journal *journal; 2048 struct ocfs2_super *osb; 2049 u64 total_blocks; 2050 2051 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2052 if (!osb) { 2053 status = -ENOMEM; 2054 mlog_errno(status); 2055 goto bail; 2056 } 2057 2058 sb->s_fs_info = osb; 2059 sb->s_op = &ocfs2_sops; 2060 sb->s_d_op = &ocfs2_dentry_ops; 2061 sb->s_export_op = &ocfs2_export_ops; 2062 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2063 sb->dq_op = &ocfs2_quota_operations; 2064 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2065 sb->s_xattr = ocfs2_xattr_handlers; 2066 sb->s_time_gran = 1; 2067 sb->s_flags |= MS_NOATIME; 2068 /* this is needed to support O_LARGEFILE */ 2069 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2070 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2071 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2072 memcpy(sb->s_uuid, di->id2.i_super.s_uuid, 2073 sizeof(di->id2.i_super.s_uuid)); 2074 2075 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2076 2077 for (i = 0; i < 3; i++) 2078 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2079 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2080 2081 osb->sb = sb; 2082 /* Save off for ocfs2_rw_direct */ 2083 osb->s_sectsize_bits = blksize_bits(sector_size); 2084 BUG_ON(!osb->s_sectsize_bits); 2085 2086 spin_lock_init(&osb->dc_task_lock); 2087 init_waitqueue_head(&osb->dc_event); 2088 osb->dc_work_sequence = 0; 2089 osb->dc_wake_sequence = 0; 2090 INIT_LIST_HEAD(&osb->blocked_lock_list); 2091 osb->blocked_lock_count = 0; 2092 spin_lock_init(&osb->osb_lock); 2093 spin_lock_init(&osb->osb_xattr_lock); 2094 ocfs2_init_steal_slots(osb); 2095 2096 mutex_init(&osb->system_file_mutex); 2097 2098 atomic_set(&osb->alloc_stats.moves, 0); 2099 atomic_set(&osb->alloc_stats.local_data, 0); 2100 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2101 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2102 atomic_set(&osb->alloc_stats.bg_extends, 0); 2103 2104 /* Copy the blockcheck stats from the superblock probe */ 2105 osb->osb_ecc_stats = *stats; 2106 2107 ocfs2_init_node_maps(osb); 2108 2109 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2110 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2111 2112 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2113 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2114 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2115 osb->max_slots); 2116 status = -EINVAL; 2117 goto bail; 2118 } 2119 2120 ocfs2_orphan_scan_init(osb); 2121 2122 status = ocfs2_recovery_init(osb); 2123 if (status) { 2124 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2125 mlog_errno(status); 2126 goto bail; 2127 } 2128 2129 init_waitqueue_head(&osb->checkpoint_event); 2130 2131 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2132 2133 osb->slot_num = OCFS2_INVALID_SLOT; 2134 2135 osb->s_xattr_inline_size = le16_to_cpu( 2136 di->id2.i_super.s_xattr_inline_size); 2137 2138 osb->local_alloc_state = OCFS2_LA_UNUSED; 2139 osb->local_alloc_bh = NULL; 2140 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2141 2142 init_waitqueue_head(&osb->osb_mount_event); 2143 2144 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2145 if (status) { 2146 mlog_errno(status); 2147 goto bail; 2148 } 2149 2150 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2151 if (!osb->vol_label) { 2152 mlog(ML_ERROR, "unable to alloc vol label\n"); 2153 status = -ENOMEM; 2154 goto bail; 2155 } 2156 2157 osb->slot_recovery_generations = 2158 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2159 GFP_KERNEL); 2160 if (!osb->slot_recovery_generations) { 2161 status = -ENOMEM; 2162 mlog_errno(status); 2163 goto bail; 2164 } 2165 2166 init_waitqueue_head(&osb->osb_wipe_event); 2167 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2168 sizeof(*osb->osb_orphan_wipes), 2169 GFP_KERNEL); 2170 if (!osb->osb_orphan_wipes) { 2171 status = -ENOMEM; 2172 mlog_errno(status); 2173 goto bail; 2174 } 2175 2176 osb->osb_rf_lock_tree = RB_ROOT; 2177 2178 osb->s_feature_compat = 2179 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2180 osb->s_feature_ro_compat = 2181 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2182 osb->s_feature_incompat = 2183 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2184 2185 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2186 mlog(ML_ERROR, "couldn't mount because of unsupported " 2187 "optional features (%x).\n", i); 2188 status = -EINVAL; 2189 goto bail; 2190 } 2191 if (!(osb->sb->s_flags & MS_RDONLY) && 2192 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2193 mlog(ML_ERROR, "couldn't mount RDWR because of " 2194 "unsupported optional features (%x).\n", i); 2195 status = -EINVAL; 2196 goto bail; 2197 } 2198 2199 if (ocfs2_clusterinfo_valid(osb)) { 2200 osb->osb_stackflags = 2201 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2202 strlcpy(osb->osb_cluster_stack, 2203 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2204 OCFS2_STACK_LABEL_LEN + 1); 2205 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2206 mlog(ML_ERROR, 2207 "couldn't mount because of an invalid " 2208 "cluster stack label (%s) \n", 2209 osb->osb_cluster_stack); 2210 status = -EINVAL; 2211 goto bail; 2212 } 2213 strlcpy(osb->osb_cluster_name, 2214 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2215 OCFS2_CLUSTER_NAME_LEN + 1); 2216 } else { 2217 /* The empty string is identical with classic tools that 2218 * don't know about s_cluster_info. */ 2219 osb->osb_cluster_stack[0] = '\0'; 2220 } 2221 2222 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2223 2224 /* FIXME 2225 * This should be done in ocfs2_journal_init(), but unknown 2226 * ordering issues will cause the filesystem to crash. 2227 * If anyone wants to figure out what part of the code 2228 * refers to osb->journal before ocfs2_journal_init() is run, 2229 * be my guest. 2230 */ 2231 /* initialize our journal structure */ 2232 2233 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2234 if (!journal) { 2235 mlog(ML_ERROR, "unable to alloc journal\n"); 2236 status = -ENOMEM; 2237 goto bail; 2238 } 2239 osb->journal = journal; 2240 journal->j_osb = osb; 2241 2242 atomic_set(&journal->j_num_trans, 0); 2243 init_rwsem(&journal->j_trans_barrier); 2244 init_waitqueue_head(&journal->j_checkpointed); 2245 spin_lock_init(&journal->j_lock); 2246 journal->j_trans_id = (unsigned long) 1; 2247 INIT_LIST_HEAD(&journal->j_la_cleanups); 2248 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2249 journal->j_state = OCFS2_JOURNAL_FREE; 2250 2251 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2252 init_llist_head(&osb->dquot_drop_list); 2253 2254 /* get some pseudo constants for clustersize bits */ 2255 osb->s_clustersize_bits = 2256 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2257 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2258 2259 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2260 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2261 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2262 osb->s_clustersize); 2263 status = -EINVAL; 2264 goto bail; 2265 } 2266 2267 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2268 le32_to_cpu(di->i_clusters)); 2269 2270 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2271 total_blocks); 2272 if (status) { 2273 mlog(ML_ERROR, "Volume too large " 2274 "to mount safely on this system"); 2275 status = -EFBIG; 2276 goto bail; 2277 } 2278 2279 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2280 sizeof(di->id2.i_super.s_uuid))) { 2281 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2282 status = -ENOMEM; 2283 goto bail; 2284 } 2285 2286 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2287 OCFS2_MAX_VOL_LABEL_LEN); 2288 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2289 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2290 osb->first_cluster_group_blkno = 2291 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2292 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2293 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2294 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2295 (unsigned long long)osb->root_blkno, 2296 (unsigned long long)osb->system_dir_blkno, 2297 osb->s_clustersize_bits); 2298 2299 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2300 if (!osb->osb_dlm_debug) { 2301 status = -ENOMEM; 2302 mlog_errno(status); 2303 goto bail; 2304 } 2305 2306 atomic_set(&osb->vol_state, VOLUME_INIT); 2307 2308 /* load root, system_dir, and all global system inodes */ 2309 status = ocfs2_init_global_system_inodes(osb); 2310 if (status < 0) { 2311 mlog_errno(status); 2312 goto bail; 2313 } 2314 2315 /* 2316 * global bitmap 2317 */ 2318 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2319 OCFS2_INVALID_SLOT); 2320 if (!inode) { 2321 status = -EINVAL; 2322 mlog_errno(status); 2323 goto bail; 2324 } 2325 2326 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2327 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2328 iput(inode); 2329 2330 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2331 osb->s_feature_incompat) * 8; 2332 2333 status = ocfs2_init_slot_info(osb); 2334 if (status < 0) { 2335 mlog_errno(status); 2336 goto bail; 2337 } 2338 cleancache_init_shared_fs(sb); 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->dirty = 1; 2492 osb->local_alloc_copy = local_alloc; 2493 local_alloc = NULL; 2494 } 2495 2496 /* go through each journal, trylock it and if you get the 2497 * lock, and it's marked as dirty, set the bit in the recover 2498 * map and launch a recovery thread for it. */ 2499 status = ocfs2_mark_dead_nodes(osb); 2500 if (status < 0) { 2501 mlog_errno(status); 2502 goto finally; 2503 } 2504 2505 status = ocfs2_compute_replay_slots(osb); 2506 if (status < 0) 2507 mlog_errno(status); 2508 2509 finally: 2510 kfree(local_alloc); 2511 2512 if (status) 2513 mlog_errno(status); 2514 return status; 2515 } 2516 2517 /* 2518 * The routine gets called from dismount or close whenever a dismount on 2519 * volume is requested and the osb open count becomes 1. 2520 * It will remove the osb from the global list and also free up all the 2521 * initialized resources and fileobject. 2522 */ 2523 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2524 { 2525 /* This function assumes that the caller has the main osb resource */ 2526 2527 ocfs2_free_slot_info(osb); 2528 2529 kfree(osb->osb_orphan_wipes); 2530 kfree(osb->slot_recovery_generations); 2531 /* FIXME 2532 * This belongs in journal shutdown, but because we have to 2533 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2534 * we free it here. 2535 */ 2536 kfree(osb->journal); 2537 kfree(osb->local_alloc_copy); 2538 kfree(osb->uuid_str); 2539 kfree(osb->vol_label); 2540 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2541 memset(osb, 0, sizeof(struct ocfs2_super)); 2542 } 2543 2544 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2545 * panic(). We do not support continue-on-error operation. */ 2546 static void ocfs2_handle_error(struct super_block *sb) 2547 { 2548 struct ocfs2_super *osb = OCFS2_SB(sb); 2549 2550 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2551 panic("OCFS2: (device %s): panic forced after error\n", 2552 sb->s_id); 2553 2554 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2555 2556 if (sb->s_flags & MS_RDONLY && 2557 (ocfs2_is_soft_readonly(osb) || 2558 ocfs2_is_hard_readonly(osb))) 2559 return; 2560 2561 printk(KERN_CRIT "File system is now read-only due to the potential " 2562 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2563 "system is unmounted.\n"); 2564 sb->s_flags |= MS_RDONLY; 2565 ocfs2_set_ro_flag(osb, 0); 2566 } 2567 2568 void __ocfs2_error(struct super_block *sb, const char *function, 2569 const char *fmt, ...) 2570 { 2571 struct va_format vaf; 2572 va_list args; 2573 2574 va_start(args, fmt); 2575 vaf.fmt = fmt; 2576 vaf.va = &args; 2577 2578 /* Not using mlog here because we want to show the actual 2579 * function the error came from. */ 2580 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV\n", 2581 sb->s_id, function, &vaf); 2582 2583 va_end(args); 2584 2585 ocfs2_handle_error(sb); 2586 } 2587 2588 /* Handle critical errors. This is intentionally more drastic than 2589 * ocfs2_handle_error, so we only use for things like journal errors, 2590 * etc. */ 2591 void __ocfs2_abort(struct super_block *sb, const char *function, 2592 const char *fmt, ...) 2593 { 2594 struct va_format vaf; 2595 va_list args; 2596 2597 va_start(args, fmt); 2598 2599 vaf.fmt = fmt; 2600 vaf.va = &args; 2601 2602 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV\n", 2603 sb->s_id, function, &vaf); 2604 2605 va_end(args); 2606 2607 /* We don't have the cluster support yet to go straight to 2608 * hard readonly in here. Until then, we want to keep 2609 * ocfs2_abort() so that we can at least mark critical 2610 * errors. 2611 * 2612 * TODO: This should abort the journal and alert other nodes 2613 * that our slot needs recovery. */ 2614 2615 /* Force a panic(). This stinks, but it's better than letting 2616 * things continue without having a proper hard readonly 2617 * here. */ 2618 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2619 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2620 ocfs2_handle_error(sb); 2621 } 2622 2623 /* 2624 * Void signal blockers, because in-kernel sigprocmask() only fails 2625 * when SIG_* is wrong. 2626 */ 2627 void ocfs2_block_signals(sigset_t *oldset) 2628 { 2629 int rc; 2630 sigset_t blocked; 2631 2632 sigfillset(&blocked); 2633 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2634 BUG_ON(rc); 2635 } 2636 2637 void ocfs2_unblock_signals(sigset_t *oldset) 2638 { 2639 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2640 BUG_ON(rc); 2641 } 2642 2643 module_init(ocfs2_init); 2644 module_exit(ocfs2_exit); 2645