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 45 #define MLOG_MASK_PREFIX ML_SUPER 46 #include <cluster/masklog.h> 47 48 #include "ocfs2.h" 49 50 /* this should be the only file to include a version 1 header */ 51 #include "ocfs1_fs_compat.h" 52 53 #include "alloc.h" 54 #include "blockcheck.h" 55 #include "dlmglue.h" 56 #include "export.h" 57 #include "extent_map.h" 58 #include "heartbeat.h" 59 #include "inode.h" 60 #include "journal.h" 61 #include "localalloc.h" 62 #include "namei.h" 63 #include "slot_map.h" 64 #include "super.h" 65 #include "sysfile.h" 66 #include "uptodate.h" 67 #include "ver.h" 68 #include "xattr.h" 69 #include "quota.h" 70 #include "refcounttree.h" 71 #include "suballoc.h" 72 73 #include "buffer_head_io.h" 74 75 static struct kmem_cache *ocfs2_inode_cachep = NULL; 76 struct kmem_cache *ocfs2_dquot_cachep; 77 struct kmem_cache *ocfs2_qf_chunk_cachep; 78 79 /* OCFS2 needs to schedule several differnt types of work which 80 * require cluster locking, disk I/O, recovery waits, etc. Since these 81 * types of work tend to be heavy we avoid using the kernel events 82 * workqueue and schedule on our own. */ 83 struct workqueue_struct *ocfs2_wq = NULL; 84 85 static struct dentry *ocfs2_debugfs_root = NULL; 86 87 MODULE_AUTHOR("Oracle"); 88 MODULE_LICENSE("GPL"); 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 vfsmount *mnt); 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 const struct super_operations ocfs2_sops = { 143 .statfs = ocfs2_statfs, 144 .alloc_inode = ocfs2_alloc_inode, 145 .destroy_inode = ocfs2_destroy_inode, 146 .drop_inode = ocfs2_drop_inode, 147 .evict_inode = ocfs2_evict_inode, 148 .sync_fs = ocfs2_sync_fs, 149 .put_super = ocfs2_put_super, 150 .remount_fs = ocfs2_remount, 151 .show_options = ocfs2_show_options, 152 .quota_read = ocfs2_quota_read, 153 .quota_write = ocfs2_quota_write, 154 }; 155 156 enum { 157 Opt_barrier, 158 Opt_err_panic, 159 Opt_err_ro, 160 Opt_intr, 161 Opt_nointr, 162 Opt_hb_none, 163 Opt_hb_local, 164 Opt_hb_global, 165 Opt_data_ordered, 166 Opt_data_writeback, 167 Opt_atime_quantum, 168 Opt_slot, 169 Opt_commit, 170 Opt_localalloc, 171 Opt_localflocks, 172 Opt_stack, 173 Opt_user_xattr, 174 Opt_nouser_xattr, 175 Opt_inode64, 176 Opt_acl, 177 Opt_noacl, 178 Opt_usrquota, 179 Opt_grpquota, 180 Opt_coherency_buffered, 181 Opt_coherency_full, 182 Opt_resv_level, 183 Opt_dir_resv_level, 184 Opt_err, 185 }; 186 187 static const match_table_t tokens = { 188 {Opt_barrier, "barrier=%u"}, 189 {Opt_err_panic, "errors=panic"}, 190 {Opt_err_ro, "errors=remount-ro"}, 191 {Opt_intr, "intr"}, 192 {Opt_nointr, "nointr"}, 193 {Opt_hb_none, OCFS2_HB_NONE}, 194 {Opt_hb_local, OCFS2_HB_LOCAL}, 195 {Opt_hb_global, OCFS2_HB_GLOBAL}, 196 {Opt_data_ordered, "data=ordered"}, 197 {Opt_data_writeback, "data=writeback"}, 198 {Opt_atime_quantum, "atime_quantum=%u"}, 199 {Opt_slot, "preferred_slot=%u"}, 200 {Opt_commit, "commit=%u"}, 201 {Opt_localalloc, "localalloc=%d"}, 202 {Opt_localflocks, "localflocks"}, 203 {Opt_stack, "cluster_stack=%s"}, 204 {Opt_user_xattr, "user_xattr"}, 205 {Opt_nouser_xattr, "nouser_xattr"}, 206 {Opt_inode64, "inode64"}, 207 {Opt_acl, "acl"}, 208 {Opt_noacl, "noacl"}, 209 {Opt_usrquota, "usrquota"}, 210 {Opt_grpquota, "grpquota"}, 211 {Opt_coherency_buffered, "coherency=buffered"}, 212 {Opt_coherency_full, "coherency=full"}, 213 {Opt_resv_level, "resv_level=%u"}, 214 {Opt_dir_resv_level, "dir_resv_level=%u"}, 215 {Opt_err, NULL} 216 }; 217 218 #ifdef CONFIG_DEBUG_FS 219 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 220 { 221 struct ocfs2_cluster_connection *cconn = osb->cconn; 222 struct ocfs2_recovery_map *rm = osb->recovery_map; 223 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 224 int i, out = 0; 225 226 out += snprintf(buf + out, len - out, 227 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 228 "Device", osb->dev_str, osb->uuid_str, 229 osb->fs_generation, osb->vol_label); 230 231 out += snprintf(buf + out, len - out, 232 "%10s => State: %d Flags: 0x%lX\n", "Volume", 233 atomic_read(&osb->vol_state), osb->osb_flags); 234 235 out += snprintf(buf + out, len - out, 236 "%10s => Block: %lu Cluster: %d\n", "Sizes", 237 osb->sb->s_blocksize, osb->s_clustersize); 238 239 out += snprintf(buf + out, len - out, 240 "%10s => Compat: 0x%X Incompat: 0x%X " 241 "ROcompat: 0x%X\n", 242 "Features", osb->s_feature_compat, 243 osb->s_feature_incompat, osb->s_feature_ro_compat); 244 245 out += snprintf(buf + out, len - out, 246 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 247 osb->s_mount_opt, osb->s_atime_quantum); 248 249 if (cconn) { 250 out += snprintf(buf + out, len - out, 251 "%10s => Stack: %s Name: %*s " 252 "Version: %d.%d\n", "Cluster", 253 (*osb->osb_cluster_stack == '\0' ? 254 "o2cb" : osb->osb_cluster_stack), 255 cconn->cc_namelen, cconn->cc_name, 256 cconn->cc_version.pv_major, 257 cconn->cc_version.pv_minor); 258 } 259 260 spin_lock(&osb->dc_task_lock); 261 out += snprintf(buf + out, len - out, 262 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 263 "WorkSeq: %lu\n", "DownCnvt", 264 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 265 osb->blocked_lock_count, osb->dc_wake_sequence, 266 osb->dc_work_sequence); 267 spin_unlock(&osb->dc_task_lock); 268 269 spin_lock(&osb->osb_lock); 270 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 271 "Recovery", 272 (osb->recovery_thread_task ? 273 task_pid_nr(osb->recovery_thread_task) : -1)); 274 if (rm->rm_used == 0) 275 out += snprintf(buf + out, len - out, " None\n"); 276 else { 277 for (i = 0; i < rm->rm_used; i++) 278 out += snprintf(buf + out, len - out, " %d", 279 rm->rm_entries[i]); 280 out += snprintf(buf + out, len - out, "\n"); 281 } 282 spin_unlock(&osb->osb_lock); 283 284 out += snprintf(buf + out, len - out, 285 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 286 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 287 osb->osb_commit_interval, 288 atomic_read(&osb->needs_checkpoint)); 289 290 out += snprintf(buf + out, len - out, 291 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 292 "Journal", osb->journal->j_state, 293 osb->journal->j_trans_id, 294 atomic_read(&osb->journal->j_num_trans)); 295 296 out += snprintf(buf + out, len - out, 297 "%10s => GlobalAllocs: %d LocalAllocs: %d " 298 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 299 "Stats", 300 atomic_read(&osb->alloc_stats.bitmap_data), 301 atomic_read(&osb->alloc_stats.local_data), 302 atomic_read(&osb->alloc_stats.bg_allocs), 303 atomic_read(&osb->alloc_stats.moves), 304 atomic_read(&osb->alloc_stats.bg_extends)); 305 306 out += snprintf(buf + out, len - out, 307 "%10s => State: %u Descriptor: %llu Size: %u bits " 308 "Default: %u bits\n", 309 "LocalAlloc", osb->local_alloc_state, 310 (unsigned long long)osb->la_last_gd, 311 osb->local_alloc_bits, osb->local_alloc_default_bits); 312 313 spin_lock(&osb->osb_lock); 314 out += snprintf(buf + out, len - out, 315 "%10s => InodeSlot: %d StolenInodes: %d, " 316 "MetaSlot: %d StolenMeta: %d\n", "Steal", 317 osb->s_inode_steal_slot, 318 atomic_read(&osb->s_num_inodes_stolen), 319 osb->s_meta_steal_slot, 320 atomic_read(&osb->s_num_meta_stolen)); 321 spin_unlock(&osb->osb_lock); 322 323 out += snprintf(buf + out, len - out, "OrphanScan => "); 324 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 325 os->os_count, os->os_seqno); 326 out += snprintf(buf + out, len - out, " Last Scan: "); 327 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 328 out += snprintf(buf + out, len - out, "Disabled\n"); 329 else 330 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 331 (get_seconds() - os->os_scantime.tv_sec)); 332 333 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 334 "Slots", "Num", "RecoGen"); 335 for (i = 0; i < osb->max_slots; ++i) { 336 out += snprintf(buf + out, len - out, 337 "%10s %c %3d %10d\n", 338 " ", 339 (i == osb->slot_num ? '*' : ' '), 340 i, osb->slot_recovery_generations[i]); 341 } 342 343 return out; 344 } 345 346 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 347 { 348 struct ocfs2_super *osb = inode->i_private; 349 char *buf = NULL; 350 351 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 352 if (!buf) 353 goto bail; 354 355 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 356 357 file->private_data = buf; 358 359 return 0; 360 bail: 361 return -ENOMEM; 362 } 363 364 static int ocfs2_debug_release(struct inode *inode, struct file *file) 365 { 366 kfree(file->private_data); 367 return 0; 368 } 369 370 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 371 size_t nbytes, loff_t *ppos) 372 { 373 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 374 i_size_read(file->f_mapping->host)); 375 } 376 #else 377 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 378 { 379 return 0; 380 } 381 static int ocfs2_debug_release(struct inode *inode, struct file *file) 382 { 383 return 0; 384 } 385 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 386 size_t nbytes, loff_t *ppos) 387 { 388 return 0; 389 } 390 #endif /* CONFIG_DEBUG_FS */ 391 392 static const struct file_operations ocfs2_osb_debug_fops = { 393 .open = ocfs2_osb_debug_open, 394 .release = ocfs2_debug_release, 395 .read = ocfs2_debug_read, 396 .llseek = generic_file_llseek, 397 }; 398 399 static int ocfs2_sync_fs(struct super_block *sb, int wait) 400 { 401 int status; 402 tid_t target; 403 struct ocfs2_super *osb = OCFS2_SB(sb); 404 405 if (ocfs2_is_hard_readonly(osb)) 406 return -EROFS; 407 408 if (wait) { 409 status = ocfs2_flush_truncate_log(osb); 410 if (status < 0) 411 mlog_errno(status); 412 } else { 413 ocfs2_schedule_truncate_log_flush(osb, 0); 414 } 415 416 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 417 &target)) { 418 if (wait) 419 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 420 target); 421 } 422 return 0; 423 } 424 425 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 426 { 427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 428 && (ino == USER_QUOTA_SYSTEM_INODE 429 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 430 return 0; 431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 432 && (ino == GROUP_QUOTA_SYSTEM_INODE 433 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 434 return 0; 435 return 1; 436 } 437 438 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 439 { 440 struct inode *new = NULL; 441 int status = 0; 442 int i; 443 444 mlog_entry_void(); 445 446 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 447 if (IS_ERR(new)) { 448 status = PTR_ERR(new); 449 mlog_errno(status); 450 goto bail; 451 } 452 osb->root_inode = new; 453 454 new = ocfs2_iget(osb, osb->system_dir_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->sys_root_inode = new; 461 462 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 463 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 464 if (!ocfs2_need_system_inode(osb, i)) 465 continue; 466 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 467 if (!new) { 468 ocfs2_release_system_inodes(osb); 469 status = -EINVAL; 470 mlog_errno(status); 471 /* FIXME: Should ERROR_RO_FS */ 472 mlog(ML_ERROR, "Unable to load system inode %d, " 473 "possibly corrupt fs?", i); 474 goto bail; 475 } 476 // the array now has one ref, so drop this one 477 iput(new); 478 } 479 480 bail: 481 mlog_exit(status); 482 return status; 483 } 484 485 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 486 { 487 struct inode *new = NULL; 488 int status = 0; 489 int i; 490 491 mlog_entry_void(); 492 493 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 494 i < NUM_SYSTEM_INODES; 495 i++) { 496 if (!ocfs2_need_system_inode(osb, i)) 497 continue; 498 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 499 if (!new) { 500 ocfs2_release_system_inodes(osb); 501 status = -EINVAL; 502 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 503 status, i, osb->slot_num); 504 goto bail; 505 } 506 /* the array now has one ref, so drop this one */ 507 iput(new); 508 } 509 510 bail: 511 mlog_exit(status); 512 return status; 513 } 514 515 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 516 { 517 int i; 518 struct inode *inode; 519 520 mlog_entry_void(); 521 522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 523 inode = osb->global_system_inodes[i]; 524 if (inode) { 525 iput(inode); 526 osb->global_system_inodes[i] = NULL; 527 } 528 } 529 530 inode = osb->sys_root_inode; 531 if (inode) { 532 iput(inode); 533 osb->sys_root_inode = NULL; 534 } 535 536 inode = osb->root_inode; 537 if (inode) { 538 iput(inode); 539 osb->root_inode = NULL; 540 } 541 542 if (!osb->local_system_inodes) 543 goto out; 544 545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 546 if (osb->local_system_inodes[i]) { 547 iput(osb->local_system_inodes[i]); 548 osb->local_system_inodes[i] = NULL; 549 } 550 } 551 552 kfree(osb->local_system_inodes); 553 osb->local_system_inodes = NULL; 554 555 out: 556 mlog_exit(0); 557 } 558 559 /* We're allocating fs objects, use GFP_NOFS */ 560 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 561 { 562 struct ocfs2_inode_info *oi; 563 564 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 565 if (!oi) 566 return NULL; 567 568 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 569 return &oi->vfs_inode; 570 } 571 572 static void ocfs2_i_callback(struct rcu_head *head) 573 { 574 struct inode *inode = container_of(head, struct inode, i_rcu); 575 INIT_LIST_HEAD(&inode->i_dentry); 576 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 577 } 578 579 static void ocfs2_destroy_inode(struct inode *inode) 580 { 581 call_rcu(&inode->i_rcu, ocfs2_i_callback); 582 } 583 584 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 585 unsigned int cbits) 586 { 587 unsigned int bytes = 1 << cbits; 588 unsigned int trim = bytes; 589 unsigned int bitshift = 32; 590 591 /* 592 * i_size and all block offsets in ocfs2 are always 64 bits 593 * wide. i_clusters is 32 bits, in cluster-sized units. So on 594 * 64 bit platforms, cluster size will be the limiting factor. 595 */ 596 597 #if BITS_PER_LONG == 32 598 # if defined(CONFIG_LBDAF) 599 BUILD_BUG_ON(sizeof(sector_t) != 8); 600 /* 601 * We might be limited by page cache size. 602 */ 603 if (bytes > PAGE_CACHE_SIZE) { 604 bytes = PAGE_CACHE_SIZE; 605 trim = 1; 606 /* 607 * Shift by 31 here so that we don't get larger than 608 * MAX_LFS_FILESIZE 609 */ 610 bitshift = 31; 611 } 612 # else 613 /* 614 * We are limited by the size of sector_t. Use block size, as 615 * that's what we expose to the VFS. 616 */ 617 bytes = 1 << bbits; 618 trim = 1; 619 bitshift = 31; 620 # endif 621 #endif 622 623 /* 624 * Trim by a whole cluster when we can actually approach the 625 * on-disk limits. Otherwise we can overflow i_clusters when 626 * an extent start is at the max offset. 627 */ 628 return (((unsigned long long)bytes) << bitshift) - trim; 629 } 630 631 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 632 { 633 int incompat_features; 634 int ret = 0; 635 struct mount_options parsed_options; 636 struct ocfs2_super *osb = OCFS2_SB(sb); 637 u32 tmp; 638 639 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 640 !ocfs2_check_set_options(sb, &parsed_options)) { 641 ret = -EINVAL; 642 goto out; 643 } 644 645 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 646 OCFS2_MOUNT_HB_NONE; 647 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 648 ret = -EINVAL; 649 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 650 goto out; 651 } 652 653 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 654 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 655 ret = -EINVAL; 656 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 657 goto out; 658 } 659 660 /* Probably don't want this on remount; it might 661 * mess with other nodes */ 662 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 663 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 664 ret = -EINVAL; 665 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 666 goto out; 667 } 668 669 /* We're going to/from readonly mode. */ 670 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 671 /* Disable quota accounting before remounting RO */ 672 if (*flags & MS_RDONLY) { 673 ret = ocfs2_susp_quotas(osb, 0); 674 if (ret < 0) 675 goto out; 676 } 677 /* Lock here so the check of HARD_RO and the potential 678 * setting of SOFT_RO is atomic. */ 679 spin_lock(&osb->osb_lock); 680 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 681 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 682 ret = -EROFS; 683 goto unlock_osb; 684 } 685 686 if (*flags & MS_RDONLY) { 687 mlog(0, "Going to ro mode.\n"); 688 sb->s_flags |= MS_RDONLY; 689 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 690 } else { 691 mlog(0, "Making ro filesystem writeable.\n"); 692 693 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 694 mlog(ML_ERROR, "Cannot remount RDWR " 695 "filesystem due to previous errors.\n"); 696 ret = -EROFS; 697 goto unlock_osb; 698 } 699 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 700 if (incompat_features) { 701 mlog(ML_ERROR, "Cannot remount RDWR because " 702 "of unsupported optional features " 703 "(%x).\n", incompat_features); 704 ret = -EINVAL; 705 goto unlock_osb; 706 } 707 sb->s_flags &= ~MS_RDONLY; 708 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 709 } 710 unlock_osb: 711 spin_unlock(&osb->osb_lock); 712 /* Enable quota accounting after remounting RW */ 713 if (!ret && !(*flags & MS_RDONLY)) { 714 if (sb_any_quota_suspended(sb)) 715 ret = ocfs2_susp_quotas(osb, 1); 716 else 717 ret = ocfs2_enable_quotas(osb); 718 if (ret < 0) { 719 /* Return back changes... */ 720 spin_lock(&osb->osb_lock); 721 sb->s_flags |= MS_RDONLY; 722 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 723 spin_unlock(&osb->osb_lock); 724 goto out; 725 } 726 } 727 } 728 729 if (!ret) { 730 /* Only save off the new mount options in case of a successful 731 * remount. */ 732 osb->s_mount_opt = parsed_options.mount_opt; 733 osb->s_atime_quantum = parsed_options.atime_quantum; 734 osb->preferred_slot = parsed_options.slot; 735 if (parsed_options.commit_interval) 736 osb->osb_commit_interval = parsed_options.commit_interval; 737 738 if (!ocfs2_is_hard_readonly(osb)) 739 ocfs2_set_journal_params(osb); 740 741 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 742 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 743 MS_POSIXACL : 0); 744 } 745 out: 746 return ret; 747 } 748 749 static int ocfs2_sb_probe(struct super_block *sb, 750 struct buffer_head **bh, 751 int *sector_size, 752 struct ocfs2_blockcheck_stats *stats) 753 { 754 int status, tmpstat; 755 struct ocfs1_vol_disk_hdr *hdr; 756 struct ocfs2_dinode *di; 757 int blksize; 758 759 *bh = NULL; 760 761 /* may be > 512 */ 762 *sector_size = bdev_logical_block_size(sb->s_bdev); 763 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 764 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 765 *sector_size, OCFS2_MAX_BLOCKSIZE); 766 status = -EINVAL; 767 goto bail; 768 } 769 770 /* Can this really happen? */ 771 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 772 *sector_size = OCFS2_MIN_BLOCKSIZE; 773 774 /* check block zero for old format */ 775 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 776 if (status < 0) { 777 mlog_errno(status); 778 goto bail; 779 } 780 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 781 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 782 mlog(ML_ERROR, "incompatible version: %u.%u\n", 783 hdr->major_version, hdr->minor_version); 784 status = -EINVAL; 785 } 786 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 787 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 788 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 789 hdr->signature); 790 status = -EINVAL; 791 } 792 brelse(*bh); 793 *bh = NULL; 794 if (status < 0) { 795 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 796 "upgraded before mounting with ocfs v2\n"); 797 goto bail; 798 } 799 800 /* 801 * Now check at magic offset for 512, 1024, 2048, 4096 802 * blocksizes. 4096 is the maximum blocksize because it is 803 * the minimum clustersize. 804 */ 805 status = -EINVAL; 806 for (blksize = *sector_size; 807 blksize <= OCFS2_MAX_BLOCKSIZE; 808 blksize <<= 1) { 809 tmpstat = ocfs2_get_sector(sb, bh, 810 OCFS2_SUPER_BLOCK_BLKNO, 811 blksize); 812 if (tmpstat < 0) { 813 status = tmpstat; 814 mlog_errno(status); 815 break; 816 } 817 di = (struct ocfs2_dinode *) (*bh)->b_data; 818 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 819 spin_lock_init(&stats->b_lock); 820 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 821 if (tmpstat < 0) { 822 brelse(*bh); 823 *bh = NULL; 824 } 825 if (tmpstat != -EAGAIN) { 826 status = tmpstat; 827 break; 828 } 829 } 830 831 bail: 832 return status; 833 } 834 835 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 836 { 837 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 838 839 if (osb->s_mount_opt & hb_enabled) { 840 if (ocfs2_mount_local(osb)) { 841 mlog(ML_ERROR, "Cannot heartbeat on a locally " 842 "mounted device.\n"); 843 return -EINVAL; 844 } 845 if (ocfs2_userspace_stack(osb)) { 846 mlog(ML_ERROR, "Userspace stack expected, but " 847 "o2cb heartbeat arguments passed to mount\n"); 848 return -EINVAL; 849 } 850 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 851 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 852 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 853 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 854 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 855 return -EINVAL; 856 } 857 } 858 859 if (!(osb->s_mount_opt & hb_enabled)) { 860 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 861 !ocfs2_userspace_stack(osb)) { 862 mlog(ML_ERROR, "Heartbeat has to be started to mount " 863 "a read-write clustered device.\n"); 864 return -EINVAL; 865 } 866 } 867 868 return 0; 869 } 870 871 /* 872 * If we're using a userspace stack, mount should have passed 873 * a name that matches the disk. If not, mount should not 874 * have passed a stack. 875 */ 876 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 877 struct mount_options *mopt) 878 { 879 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 880 mlog(ML_ERROR, 881 "cluster stack passed to mount, but this filesystem " 882 "does not support it\n"); 883 return -EINVAL; 884 } 885 886 if (ocfs2_userspace_stack(osb) && 887 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 888 OCFS2_STACK_LABEL_LEN)) { 889 mlog(ML_ERROR, 890 "cluster stack passed to mount (\"%s\") does not " 891 "match the filesystem (\"%s\")\n", 892 mopt->cluster_stack, 893 osb->osb_cluster_stack); 894 return -EINVAL; 895 } 896 897 return 0; 898 } 899 900 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 901 { 902 int type; 903 struct super_block *sb = osb->sb; 904 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 905 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 906 int status = 0; 907 908 for (type = 0; type < MAXQUOTAS; type++) { 909 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 910 continue; 911 if (unsuspend) 912 status = dquot_resume(sb, type); 913 else { 914 struct ocfs2_mem_dqinfo *oinfo; 915 916 /* Cancel periodic syncing before suspending */ 917 oinfo = sb_dqinfo(sb, type)->dqi_priv; 918 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 919 status = dquot_suspend(sb, type); 920 } 921 if (status < 0) 922 break; 923 } 924 if (status < 0) 925 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 926 "remount (error = %d).\n", status); 927 return status; 928 } 929 930 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 931 { 932 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 933 struct super_block *sb = osb->sb; 934 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 935 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 936 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 937 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 938 int status; 939 int type; 940 941 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 942 for (type = 0; type < MAXQUOTAS; type++) { 943 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 944 continue; 945 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 946 osb->slot_num); 947 if (!inode[type]) { 948 status = -ENOENT; 949 goto out_quota_off; 950 } 951 status = dquot_enable(inode[type], type, QFMT_OCFS2, 952 DQUOT_USAGE_ENABLED); 953 if (status < 0) 954 goto out_quota_off; 955 } 956 957 for (type = 0; type < MAXQUOTAS; type++) 958 iput(inode[type]); 959 return 0; 960 out_quota_off: 961 ocfs2_disable_quotas(osb); 962 for (type = 0; type < MAXQUOTAS; type++) 963 iput(inode[type]); 964 mlog_errno(status); 965 return status; 966 } 967 968 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 969 { 970 int type; 971 struct inode *inode; 972 struct super_block *sb = osb->sb; 973 struct ocfs2_mem_dqinfo *oinfo; 974 975 /* We mostly ignore errors in this function because there's not much 976 * we can do when we see them */ 977 for (type = 0; type < MAXQUOTAS; type++) { 978 if (!sb_has_quota_loaded(sb, type)) 979 continue; 980 /* Cancel periodic syncing before we grab dqonoff_mutex */ 981 oinfo = sb_dqinfo(sb, type)->dqi_priv; 982 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 983 inode = igrab(sb->s_dquot.files[type]); 984 /* Turn off quotas. This will remove all dquot structures from 985 * memory and so they will be automatically synced to global 986 * quota files */ 987 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 988 DQUOT_LIMITS_ENABLED); 989 if (!inode) 990 continue; 991 iput(inode); 992 } 993 } 994 995 /* Handle quota on quotactl */ 996 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 997 char *path) 998 { 999 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 1000 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 1001 1002 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 1003 return -EINVAL; 1004 1005 return dquot_enable(sb_dqopt(sb)->files[type], type, 1006 format_id, DQUOT_LIMITS_ENABLED); 1007 } 1008 1009 /* Handle quota off quotactl */ 1010 static int ocfs2_quota_off(struct super_block *sb, int type) 1011 { 1012 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 1013 } 1014 1015 static const struct quotactl_ops ocfs2_quotactl_ops = { 1016 .quota_on = ocfs2_quota_on, 1017 .quota_off = ocfs2_quota_off, 1018 .quota_sync = dquot_quota_sync, 1019 .get_info = dquot_get_dqinfo, 1020 .set_info = dquot_set_dqinfo, 1021 .get_dqblk = dquot_get_dqblk, 1022 .set_dqblk = dquot_set_dqblk, 1023 }; 1024 1025 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1026 { 1027 struct dentry *root; 1028 int status, sector_size; 1029 struct mount_options parsed_options; 1030 struct inode *inode = NULL; 1031 struct ocfs2_super *osb = NULL; 1032 struct buffer_head *bh = NULL; 1033 char nodestr[8]; 1034 struct ocfs2_blockcheck_stats stats; 1035 1036 mlog_entry("%p, %p, %i", sb, data, silent); 1037 1038 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1039 status = -EINVAL; 1040 goto read_super_error; 1041 } 1042 1043 /* probe for superblock */ 1044 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1045 if (status < 0) { 1046 mlog(ML_ERROR, "superblock probe failed!\n"); 1047 goto read_super_error; 1048 } 1049 1050 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1051 osb = OCFS2_SB(sb); 1052 if (status < 0) { 1053 mlog_errno(status); 1054 goto read_super_error; 1055 } 1056 brelse(bh); 1057 bh = NULL; 1058 1059 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1060 status = -EINVAL; 1061 goto read_super_error; 1062 } 1063 osb->s_mount_opt = parsed_options.mount_opt; 1064 osb->s_atime_quantum = parsed_options.atime_quantum; 1065 osb->preferred_slot = parsed_options.slot; 1066 osb->osb_commit_interval = parsed_options.commit_interval; 1067 1068 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1069 osb->osb_resv_level = parsed_options.resv_level; 1070 osb->osb_dir_resv_level = parsed_options.resv_level; 1071 if (parsed_options.dir_resv_level == -1) 1072 osb->osb_dir_resv_level = parsed_options.resv_level; 1073 else 1074 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1075 1076 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1077 if (status) 1078 goto read_super_error; 1079 1080 sb->s_magic = OCFS2_SUPER_MAGIC; 1081 1082 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1083 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1084 1085 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1086 * heartbeat=none */ 1087 if (bdev_read_only(sb->s_bdev)) { 1088 if (!(sb->s_flags & MS_RDONLY)) { 1089 status = -EACCES; 1090 mlog(ML_ERROR, "Readonly device detected but readonly " 1091 "mount was not specified.\n"); 1092 goto read_super_error; 1093 } 1094 1095 /* You should not be able to start a local heartbeat 1096 * on a readonly device. */ 1097 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1098 status = -EROFS; 1099 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1100 "device.\n"); 1101 goto read_super_error; 1102 } 1103 1104 status = ocfs2_check_journals_nolocks(osb); 1105 if (status < 0) { 1106 if (status == -EROFS) 1107 mlog(ML_ERROR, "Recovery required on readonly " 1108 "file system, but write access is " 1109 "unavailable.\n"); 1110 else 1111 mlog_errno(status); 1112 goto read_super_error; 1113 } 1114 1115 ocfs2_set_ro_flag(osb, 1); 1116 1117 printk(KERN_NOTICE "Readonly device detected. No cluster " 1118 "services will be utilized for this mount. Recovery " 1119 "will be skipped.\n"); 1120 } 1121 1122 if (!ocfs2_is_hard_readonly(osb)) { 1123 if (sb->s_flags & MS_RDONLY) 1124 ocfs2_set_ro_flag(osb, 0); 1125 } 1126 1127 status = ocfs2_verify_heartbeat(osb); 1128 if (status < 0) { 1129 mlog_errno(status); 1130 goto read_super_error; 1131 } 1132 1133 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1134 ocfs2_debugfs_root); 1135 if (!osb->osb_debug_root) { 1136 status = -EINVAL; 1137 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1138 goto read_super_error; 1139 } 1140 1141 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1142 osb->osb_debug_root, 1143 osb, 1144 &ocfs2_osb_debug_fops); 1145 if (!osb->osb_ctxt) { 1146 status = -EINVAL; 1147 mlog_errno(status); 1148 goto read_super_error; 1149 } 1150 1151 if (ocfs2_meta_ecc(osb)) { 1152 status = ocfs2_blockcheck_stats_debugfs_install( 1153 &osb->osb_ecc_stats, 1154 osb->osb_debug_root); 1155 if (status) { 1156 mlog(ML_ERROR, 1157 "Unable to create blockcheck statistics " 1158 "files\n"); 1159 goto read_super_error; 1160 } 1161 } 1162 1163 status = ocfs2_mount_volume(sb); 1164 if (osb->root_inode) 1165 inode = igrab(osb->root_inode); 1166 1167 if (status < 0) 1168 goto read_super_error; 1169 1170 if (!inode) { 1171 status = -EIO; 1172 mlog_errno(status); 1173 goto read_super_error; 1174 } 1175 1176 root = d_alloc_root(inode); 1177 if (!root) { 1178 status = -ENOMEM; 1179 mlog_errno(status); 1180 goto read_super_error; 1181 } 1182 1183 sb->s_root = root; 1184 1185 ocfs2_complete_mount_recovery(osb); 1186 1187 if (ocfs2_mount_local(osb)) 1188 snprintf(nodestr, sizeof(nodestr), "local"); 1189 else 1190 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1191 1192 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1193 "with %s data mode.\n", 1194 osb->dev_str, nodestr, osb->slot_num, 1195 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1196 "ordered"); 1197 1198 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1199 wake_up(&osb->osb_mount_event); 1200 1201 /* Now we can initialize quotas because we can afford to wait 1202 * for cluster locks recovery now. That also means that truncation 1203 * log recovery can happen but that waits for proper quota setup */ 1204 if (!(sb->s_flags & MS_RDONLY)) { 1205 status = ocfs2_enable_quotas(osb); 1206 if (status < 0) { 1207 /* We have to err-out specially here because 1208 * s_root is already set */ 1209 mlog_errno(status); 1210 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1211 wake_up(&osb->osb_mount_event); 1212 mlog_exit(status); 1213 return status; 1214 } 1215 } 1216 1217 ocfs2_complete_quota_recovery(osb); 1218 1219 /* Now we wake up again for processes waiting for quotas */ 1220 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1221 wake_up(&osb->osb_mount_event); 1222 1223 /* Start this when the mount is almost sure of being successful */ 1224 ocfs2_orphan_scan_start(osb); 1225 1226 mlog_exit(status); 1227 return status; 1228 1229 read_super_error: 1230 brelse(bh); 1231 1232 if (inode) 1233 iput(inode); 1234 1235 if (osb) { 1236 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1237 wake_up(&osb->osb_mount_event); 1238 ocfs2_dismount_volume(sb, 1); 1239 } 1240 1241 mlog_exit(status); 1242 return status; 1243 } 1244 1245 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1246 int flags, 1247 const char *dev_name, 1248 void *data) 1249 { 1250 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1251 } 1252 1253 static void ocfs2_kill_sb(struct super_block *sb) 1254 { 1255 struct ocfs2_super *osb = OCFS2_SB(sb); 1256 1257 /* Failed mount? */ 1258 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1259 goto out; 1260 1261 /* Prevent further queueing of inode drop events */ 1262 spin_lock(&dentry_list_lock); 1263 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1264 spin_unlock(&dentry_list_lock); 1265 /* Wait for work to finish and/or remove it */ 1266 cancel_work_sync(&osb->dentry_lock_work); 1267 out: 1268 kill_block_super(sb); 1269 } 1270 1271 static struct file_system_type ocfs2_fs_type = { 1272 .owner = THIS_MODULE, 1273 .name = "ocfs2", 1274 .mount = ocfs2_mount, 1275 .kill_sb = ocfs2_kill_sb, 1276 1277 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1278 .next = NULL 1279 }; 1280 1281 static int ocfs2_check_set_options(struct super_block *sb, 1282 struct mount_options *options) 1283 { 1284 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1285 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1286 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1287 mlog(ML_ERROR, "User quotas were requested, but this " 1288 "filesystem does not have the feature enabled.\n"); 1289 return 0; 1290 } 1291 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1292 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1293 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1294 mlog(ML_ERROR, "Group quotas were requested, but this " 1295 "filesystem does not have the feature enabled.\n"); 1296 return 0; 1297 } 1298 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1299 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1300 mlog(ML_ERROR, "ACL support requested but extended attributes " 1301 "feature is not enabled\n"); 1302 return 0; 1303 } 1304 /* No ACL setting specified? Use XATTR feature... */ 1305 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1306 OCFS2_MOUNT_NO_POSIX_ACL))) { 1307 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1308 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1309 else 1310 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1311 } 1312 return 1; 1313 } 1314 1315 static int ocfs2_parse_options(struct super_block *sb, 1316 char *options, 1317 struct mount_options *mopt, 1318 int is_remount) 1319 { 1320 int status; 1321 char *p; 1322 u32 tmp; 1323 1324 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1325 options ? options : "(none)"); 1326 1327 mopt->commit_interval = 0; 1328 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1329 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1330 mopt->slot = OCFS2_INVALID_SLOT; 1331 mopt->localalloc_opt = -1; 1332 mopt->cluster_stack[0] = '\0'; 1333 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1334 mopt->dir_resv_level = -1; 1335 1336 if (!options) { 1337 status = 1; 1338 goto bail; 1339 } 1340 1341 while ((p = strsep(&options, ",")) != NULL) { 1342 int token, option; 1343 substring_t args[MAX_OPT_ARGS]; 1344 1345 if (!*p) 1346 continue; 1347 1348 token = match_token(p, tokens, args); 1349 switch (token) { 1350 case Opt_hb_local: 1351 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1352 break; 1353 case Opt_hb_none: 1354 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1355 break; 1356 case Opt_hb_global: 1357 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1358 break; 1359 case Opt_barrier: 1360 if (match_int(&args[0], &option)) { 1361 status = 0; 1362 goto bail; 1363 } 1364 if (option) 1365 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1366 else 1367 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1368 break; 1369 case Opt_intr: 1370 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1371 break; 1372 case Opt_nointr: 1373 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1374 break; 1375 case Opt_err_panic: 1376 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1377 break; 1378 case Opt_err_ro: 1379 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1380 break; 1381 case Opt_data_ordered: 1382 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1383 break; 1384 case Opt_data_writeback: 1385 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1386 break; 1387 case Opt_user_xattr: 1388 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1389 break; 1390 case Opt_nouser_xattr: 1391 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1392 break; 1393 case Opt_atime_quantum: 1394 if (match_int(&args[0], &option)) { 1395 status = 0; 1396 goto bail; 1397 } 1398 if (option >= 0) 1399 mopt->atime_quantum = option; 1400 break; 1401 case Opt_slot: 1402 option = 0; 1403 if (match_int(&args[0], &option)) { 1404 status = 0; 1405 goto bail; 1406 } 1407 if (option) 1408 mopt->slot = (s16)option; 1409 break; 1410 case Opt_commit: 1411 option = 0; 1412 if (match_int(&args[0], &option)) { 1413 status = 0; 1414 goto bail; 1415 } 1416 if (option < 0) 1417 return 0; 1418 if (option == 0) 1419 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1420 mopt->commit_interval = HZ * option; 1421 break; 1422 case Opt_localalloc: 1423 option = 0; 1424 if (match_int(&args[0], &option)) { 1425 status = 0; 1426 goto bail; 1427 } 1428 if (option >= 0) 1429 mopt->localalloc_opt = option; 1430 break; 1431 case Opt_localflocks: 1432 /* 1433 * Changing this during remount could race 1434 * flock() requests, or "unbalance" existing 1435 * ones (e.g., a lock is taken in one mode but 1436 * dropped in the other). If users care enough 1437 * to flip locking modes during remount, we 1438 * could add a "local" flag to individual 1439 * flock structures for proper tracking of 1440 * state. 1441 */ 1442 if (!is_remount) 1443 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1444 break; 1445 case Opt_stack: 1446 /* Check both that the option we were passed 1447 * is of the right length and that it is a proper 1448 * string of the right length. 1449 */ 1450 if (((args[0].to - args[0].from) != 1451 OCFS2_STACK_LABEL_LEN) || 1452 (strnlen(args[0].from, 1453 OCFS2_STACK_LABEL_LEN) != 1454 OCFS2_STACK_LABEL_LEN)) { 1455 mlog(ML_ERROR, 1456 "Invalid cluster_stack option\n"); 1457 status = 0; 1458 goto bail; 1459 } 1460 memcpy(mopt->cluster_stack, args[0].from, 1461 OCFS2_STACK_LABEL_LEN); 1462 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1463 break; 1464 case Opt_inode64: 1465 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1466 break; 1467 case Opt_usrquota: 1468 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1469 break; 1470 case Opt_grpquota: 1471 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1472 break; 1473 case Opt_coherency_buffered: 1474 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1475 break; 1476 case Opt_coherency_full: 1477 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1478 break; 1479 case Opt_acl: 1480 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1481 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1482 break; 1483 case Opt_noacl: 1484 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1485 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1486 break; 1487 case Opt_resv_level: 1488 if (is_remount) 1489 break; 1490 if (match_int(&args[0], &option)) { 1491 status = 0; 1492 goto bail; 1493 } 1494 if (option >= OCFS2_MIN_RESV_LEVEL && 1495 option < OCFS2_MAX_RESV_LEVEL) 1496 mopt->resv_level = option; 1497 break; 1498 case Opt_dir_resv_level: 1499 if (is_remount) 1500 break; 1501 if (match_int(&args[0], &option)) { 1502 status = 0; 1503 goto bail; 1504 } 1505 if (option >= OCFS2_MIN_RESV_LEVEL && 1506 option < OCFS2_MAX_RESV_LEVEL) 1507 mopt->dir_resv_level = option; 1508 break; 1509 default: 1510 mlog(ML_ERROR, 1511 "Unrecognized mount option \"%s\" " 1512 "or missing value\n", p); 1513 status = 0; 1514 goto bail; 1515 } 1516 } 1517 1518 /* Ensure only one heartbeat mode */ 1519 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 1520 OCFS2_MOUNT_HB_NONE); 1521 if (hweight32(tmp) != 1) { 1522 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1523 status = 0; 1524 goto bail; 1525 } 1526 1527 status = 1; 1528 1529 bail: 1530 mlog_exit(status); 1531 return status; 1532 } 1533 1534 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1535 { 1536 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1537 unsigned long opts = osb->s_mount_opt; 1538 unsigned int local_alloc_megs; 1539 1540 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1541 seq_printf(s, ",_netdev"); 1542 if (opts & OCFS2_MOUNT_HB_LOCAL) 1543 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1544 else 1545 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1546 } else 1547 seq_printf(s, ",%s", OCFS2_HB_NONE); 1548 1549 if (opts & OCFS2_MOUNT_NOINTR) 1550 seq_printf(s, ",nointr"); 1551 1552 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1553 seq_printf(s, ",data=writeback"); 1554 else 1555 seq_printf(s, ",data=ordered"); 1556 1557 if (opts & OCFS2_MOUNT_BARRIER) 1558 seq_printf(s, ",barrier=1"); 1559 1560 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1561 seq_printf(s, ",errors=panic"); 1562 else 1563 seq_printf(s, ",errors=remount-ro"); 1564 1565 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1566 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1567 1568 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1569 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1570 1571 if (osb->osb_commit_interval) 1572 seq_printf(s, ",commit=%u", 1573 (unsigned) (osb->osb_commit_interval / HZ)); 1574 1575 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1576 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1577 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1578 1579 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1580 seq_printf(s, ",localflocks,"); 1581 1582 if (osb->osb_cluster_stack[0]) 1583 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1584 osb->osb_cluster_stack); 1585 if (opts & OCFS2_MOUNT_USRQUOTA) 1586 seq_printf(s, ",usrquota"); 1587 if (opts & OCFS2_MOUNT_GRPQUOTA) 1588 seq_printf(s, ",grpquota"); 1589 1590 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1591 seq_printf(s, ",coherency=buffered"); 1592 else 1593 seq_printf(s, ",coherency=full"); 1594 1595 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1596 seq_printf(s, ",nouser_xattr"); 1597 else 1598 seq_printf(s, ",user_xattr"); 1599 1600 if (opts & OCFS2_MOUNT_INODE64) 1601 seq_printf(s, ",inode64"); 1602 1603 if (opts & OCFS2_MOUNT_POSIX_ACL) 1604 seq_printf(s, ",acl"); 1605 else 1606 seq_printf(s, ",noacl"); 1607 1608 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1609 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1610 1611 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1612 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1613 1614 return 0; 1615 } 1616 1617 static int __init ocfs2_init(void) 1618 { 1619 int status; 1620 1621 mlog_entry_void(); 1622 1623 ocfs2_print_version(); 1624 1625 status = init_ocfs2_uptodate_cache(); 1626 if (status < 0) { 1627 mlog_errno(status); 1628 goto leave; 1629 } 1630 1631 status = ocfs2_initialize_mem_caches(); 1632 if (status < 0) { 1633 mlog_errno(status); 1634 goto leave; 1635 } 1636 1637 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1638 if (!ocfs2_wq) { 1639 status = -ENOMEM; 1640 goto leave; 1641 } 1642 1643 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1644 if (!ocfs2_debugfs_root) { 1645 status = -EFAULT; 1646 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1647 } 1648 1649 status = ocfs2_quota_setup(); 1650 if (status) 1651 goto leave; 1652 1653 ocfs2_set_locking_protocol(); 1654 1655 status = register_quota_format(&ocfs2_quota_format); 1656 leave: 1657 if (status < 0) { 1658 ocfs2_quota_shutdown(); 1659 ocfs2_free_mem_caches(); 1660 exit_ocfs2_uptodate_cache(); 1661 } 1662 1663 mlog_exit(status); 1664 1665 if (status >= 0) { 1666 return register_filesystem(&ocfs2_fs_type); 1667 } else 1668 return -1; 1669 } 1670 1671 static void __exit ocfs2_exit(void) 1672 { 1673 mlog_entry_void(); 1674 1675 ocfs2_quota_shutdown(); 1676 1677 if (ocfs2_wq) { 1678 flush_workqueue(ocfs2_wq); 1679 destroy_workqueue(ocfs2_wq); 1680 } 1681 1682 unregister_quota_format(&ocfs2_quota_format); 1683 1684 debugfs_remove(ocfs2_debugfs_root); 1685 1686 ocfs2_free_mem_caches(); 1687 1688 unregister_filesystem(&ocfs2_fs_type); 1689 1690 exit_ocfs2_uptodate_cache(); 1691 1692 mlog_exit_void(); 1693 } 1694 1695 static void ocfs2_put_super(struct super_block *sb) 1696 { 1697 mlog_entry("(0x%p)\n", sb); 1698 1699 ocfs2_sync_blockdev(sb); 1700 ocfs2_dismount_volume(sb, 0); 1701 1702 mlog_exit_void(); 1703 } 1704 1705 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1706 { 1707 struct ocfs2_super *osb; 1708 u32 numbits, freebits; 1709 int status; 1710 struct ocfs2_dinode *bm_lock; 1711 struct buffer_head *bh = NULL; 1712 struct inode *inode = NULL; 1713 1714 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1715 1716 osb = OCFS2_SB(dentry->d_sb); 1717 1718 inode = ocfs2_get_system_file_inode(osb, 1719 GLOBAL_BITMAP_SYSTEM_INODE, 1720 OCFS2_INVALID_SLOT); 1721 if (!inode) { 1722 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1723 status = -EIO; 1724 goto bail; 1725 } 1726 1727 status = ocfs2_inode_lock(inode, &bh, 0); 1728 if (status < 0) { 1729 mlog_errno(status); 1730 goto bail; 1731 } 1732 1733 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1734 1735 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1736 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1737 1738 buf->f_type = OCFS2_SUPER_MAGIC; 1739 buf->f_bsize = dentry->d_sb->s_blocksize; 1740 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1741 buf->f_blocks = ((sector_t) numbits) * 1742 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1743 buf->f_bfree = ((sector_t) freebits) * 1744 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1745 buf->f_bavail = buf->f_bfree; 1746 buf->f_files = numbits; 1747 buf->f_ffree = freebits; 1748 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1749 & 0xFFFFFFFFUL; 1750 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1751 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1752 1753 brelse(bh); 1754 1755 ocfs2_inode_unlock(inode, 0); 1756 status = 0; 1757 bail: 1758 if (inode) 1759 iput(inode); 1760 1761 mlog_exit(status); 1762 1763 return status; 1764 } 1765 1766 static void ocfs2_inode_init_once(void *data) 1767 { 1768 struct ocfs2_inode_info *oi = data; 1769 1770 oi->ip_flags = 0; 1771 oi->ip_open_count = 0; 1772 spin_lock_init(&oi->ip_lock); 1773 ocfs2_extent_map_init(&oi->vfs_inode); 1774 INIT_LIST_HEAD(&oi->ip_io_markers); 1775 oi->ip_dir_start_lookup = 0; 1776 1777 init_rwsem(&oi->ip_alloc_sem); 1778 init_rwsem(&oi->ip_xattr_sem); 1779 mutex_init(&oi->ip_io_mutex); 1780 1781 oi->ip_blkno = 0ULL; 1782 oi->ip_clusters = 0; 1783 1784 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1785 1786 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1787 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1788 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1789 1790 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1791 &ocfs2_inode_caching_ops); 1792 1793 inode_init_once(&oi->vfs_inode); 1794 } 1795 1796 static int ocfs2_initialize_mem_caches(void) 1797 { 1798 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1799 sizeof(struct ocfs2_inode_info), 1800 0, 1801 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1802 SLAB_MEM_SPREAD), 1803 ocfs2_inode_init_once); 1804 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1805 sizeof(struct ocfs2_dquot), 1806 0, 1807 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1808 SLAB_MEM_SPREAD), 1809 NULL); 1810 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1811 sizeof(struct ocfs2_quota_chunk), 1812 0, 1813 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1814 NULL); 1815 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1816 !ocfs2_qf_chunk_cachep) { 1817 if (ocfs2_inode_cachep) 1818 kmem_cache_destroy(ocfs2_inode_cachep); 1819 if (ocfs2_dquot_cachep) 1820 kmem_cache_destroy(ocfs2_dquot_cachep); 1821 if (ocfs2_qf_chunk_cachep) 1822 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1823 return -ENOMEM; 1824 } 1825 1826 return 0; 1827 } 1828 1829 static void ocfs2_free_mem_caches(void) 1830 { 1831 if (ocfs2_inode_cachep) 1832 kmem_cache_destroy(ocfs2_inode_cachep); 1833 ocfs2_inode_cachep = NULL; 1834 1835 if (ocfs2_dquot_cachep) 1836 kmem_cache_destroy(ocfs2_dquot_cachep); 1837 ocfs2_dquot_cachep = NULL; 1838 1839 if (ocfs2_qf_chunk_cachep) 1840 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1841 ocfs2_qf_chunk_cachep = NULL; 1842 } 1843 1844 static int ocfs2_get_sector(struct super_block *sb, 1845 struct buffer_head **bh, 1846 int block, 1847 int sect_size) 1848 { 1849 if (!sb_set_blocksize(sb, sect_size)) { 1850 mlog(ML_ERROR, "unable to set blocksize\n"); 1851 return -EIO; 1852 } 1853 1854 *bh = sb_getblk(sb, block); 1855 if (!*bh) { 1856 mlog_errno(-EIO); 1857 return -EIO; 1858 } 1859 lock_buffer(*bh); 1860 if (!buffer_dirty(*bh)) 1861 clear_buffer_uptodate(*bh); 1862 unlock_buffer(*bh); 1863 ll_rw_block(READ, 1, bh); 1864 wait_on_buffer(*bh); 1865 if (!buffer_uptodate(*bh)) { 1866 mlog_errno(-EIO); 1867 brelse(*bh); 1868 *bh = NULL; 1869 return -EIO; 1870 } 1871 1872 return 0; 1873 } 1874 1875 static int ocfs2_mount_volume(struct super_block *sb) 1876 { 1877 int status = 0; 1878 int unlock_super = 0; 1879 struct ocfs2_super *osb = OCFS2_SB(sb); 1880 1881 mlog_entry_void(); 1882 1883 if (ocfs2_is_hard_readonly(osb)) 1884 goto leave; 1885 1886 status = ocfs2_dlm_init(osb); 1887 if (status < 0) { 1888 mlog_errno(status); 1889 goto leave; 1890 } 1891 1892 status = ocfs2_super_lock(osb, 1); 1893 if (status < 0) { 1894 mlog_errno(status); 1895 goto leave; 1896 } 1897 unlock_super = 1; 1898 1899 /* This will load up the node map and add ourselves to it. */ 1900 status = ocfs2_find_slot(osb); 1901 if (status < 0) { 1902 mlog_errno(status); 1903 goto leave; 1904 } 1905 1906 /* load all node-local system inodes */ 1907 status = ocfs2_init_local_system_inodes(osb); 1908 if (status < 0) { 1909 mlog_errno(status); 1910 goto leave; 1911 } 1912 1913 status = ocfs2_check_volume(osb); 1914 if (status < 0) { 1915 mlog_errno(status); 1916 goto leave; 1917 } 1918 1919 status = ocfs2_truncate_log_init(osb); 1920 if (status < 0) 1921 mlog_errno(status); 1922 1923 leave: 1924 if (unlock_super) 1925 ocfs2_super_unlock(osb, 1); 1926 1927 mlog_exit(status); 1928 return status; 1929 } 1930 1931 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1932 { 1933 int tmp, hangup_needed = 0; 1934 struct ocfs2_super *osb = NULL; 1935 char nodestr[8]; 1936 1937 mlog_entry("(0x%p)\n", sb); 1938 1939 BUG_ON(!sb); 1940 osb = OCFS2_SB(sb); 1941 BUG_ON(!osb); 1942 1943 debugfs_remove(osb->osb_ctxt); 1944 1945 /* 1946 * Flush inode dropping work queue so that deletes are 1947 * performed while the filesystem is still working 1948 */ 1949 ocfs2_drop_all_dl_inodes(osb); 1950 1951 /* Orphan scan should be stopped as early as possible */ 1952 ocfs2_orphan_scan_stop(osb); 1953 1954 ocfs2_disable_quotas(osb); 1955 1956 ocfs2_shutdown_local_alloc(osb); 1957 1958 ocfs2_truncate_log_shutdown(osb); 1959 1960 /* This will disable recovery and flush any recovery work. */ 1961 ocfs2_recovery_exit(osb); 1962 1963 ocfs2_journal_shutdown(osb); 1964 1965 ocfs2_sync_blockdev(sb); 1966 1967 ocfs2_purge_refcount_trees(osb); 1968 1969 /* No cluster connection means we've failed during mount, so skip 1970 * all the steps which depended on that to complete. */ 1971 if (osb->cconn) { 1972 tmp = ocfs2_super_lock(osb, 1); 1973 if (tmp < 0) { 1974 mlog_errno(tmp); 1975 return; 1976 } 1977 } 1978 1979 if (osb->slot_num != OCFS2_INVALID_SLOT) 1980 ocfs2_put_slot(osb); 1981 1982 if (osb->cconn) 1983 ocfs2_super_unlock(osb, 1); 1984 1985 ocfs2_release_system_inodes(osb); 1986 1987 /* 1988 * If we're dismounting due to mount error, mount.ocfs2 will clean 1989 * up heartbeat. If we're a local mount, there is no heartbeat. 1990 * If we failed before we got a uuid_str yet, we can't stop 1991 * heartbeat. Otherwise, do it. 1992 */ 1993 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1994 hangup_needed = 1; 1995 1996 if (osb->cconn) 1997 ocfs2_dlm_shutdown(osb, hangup_needed); 1998 1999 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 2000 debugfs_remove(osb->osb_debug_root); 2001 2002 if (hangup_needed) 2003 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 2004 2005 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 2006 2007 if (ocfs2_mount_local(osb)) 2008 snprintf(nodestr, sizeof(nodestr), "local"); 2009 else 2010 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 2011 2012 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 2013 osb->dev_str, nodestr); 2014 2015 ocfs2_delete_osb(osb); 2016 kfree(osb); 2017 sb->s_dev = 0; 2018 sb->s_fs_info = NULL; 2019 } 2020 2021 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2022 unsigned uuid_bytes) 2023 { 2024 int i, ret; 2025 char *ptr; 2026 2027 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2028 2029 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2030 if (osb->uuid_str == NULL) 2031 return -ENOMEM; 2032 2033 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2034 /* print with null */ 2035 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2036 if (ret != 2) /* drop super cleans up */ 2037 return -EINVAL; 2038 /* then only advance past the last char */ 2039 ptr += 2; 2040 } 2041 2042 return 0; 2043 } 2044 2045 /* Make sure entire volume is addressable by our journal. Requires 2046 osb_clusters_at_boot to be valid and for the journal to have been 2047 initialized by ocfs2_journal_init(). */ 2048 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2049 { 2050 int status = 0; 2051 u64 max_block = 2052 ocfs2_clusters_to_blocks(osb->sb, 2053 osb->osb_clusters_at_boot) - 1; 2054 2055 /* 32-bit block number is always OK. */ 2056 if (max_block <= (u32)~0ULL) 2057 goto out; 2058 2059 /* Volume is "huge", so see if our journal is new enough to 2060 support it. */ 2061 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2062 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2063 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2064 JBD2_FEATURE_INCOMPAT_64BIT))) { 2065 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2066 "Enable the 'block64' journal option with tunefs.ocfs2"); 2067 status = -EFBIG; 2068 goto out; 2069 } 2070 2071 out: 2072 return status; 2073 } 2074 2075 static int ocfs2_initialize_super(struct super_block *sb, 2076 struct buffer_head *bh, 2077 int sector_size, 2078 struct ocfs2_blockcheck_stats *stats) 2079 { 2080 int status; 2081 int i, cbits, bbits; 2082 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2083 struct inode *inode = NULL; 2084 struct ocfs2_journal *journal; 2085 __le32 uuid_net_key; 2086 struct ocfs2_super *osb; 2087 u64 total_blocks; 2088 2089 mlog_entry_void(); 2090 2091 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2092 if (!osb) { 2093 status = -ENOMEM; 2094 mlog_errno(status); 2095 goto bail; 2096 } 2097 2098 sb->s_fs_info = osb; 2099 sb->s_op = &ocfs2_sops; 2100 sb->s_d_op = &ocfs2_dentry_ops; 2101 sb->s_export_op = &ocfs2_export_ops; 2102 sb->s_qcop = &ocfs2_quotactl_ops; 2103 sb->dq_op = &ocfs2_quota_operations; 2104 sb->s_xattr = ocfs2_xattr_handlers; 2105 sb->s_time_gran = 1; 2106 sb->s_flags |= MS_NOATIME; 2107 /* this is needed to support O_LARGEFILE */ 2108 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2109 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2110 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2111 2112 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2113 2114 for (i = 0; i < 3; i++) 2115 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2116 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2117 2118 osb->sb = sb; 2119 /* Save off for ocfs2_rw_direct */ 2120 osb->s_sectsize_bits = blksize_bits(sector_size); 2121 BUG_ON(!osb->s_sectsize_bits); 2122 2123 spin_lock_init(&osb->dc_task_lock); 2124 init_waitqueue_head(&osb->dc_event); 2125 osb->dc_work_sequence = 0; 2126 osb->dc_wake_sequence = 0; 2127 INIT_LIST_HEAD(&osb->blocked_lock_list); 2128 osb->blocked_lock_count = 0; 2129 spin_lock_init(&osb->osb_lock); 2130 spin_lock_init(&osb->osb_xattr_lock); 2131 ocfs2_init_steal_slots(osb); 2132 2133 atomic_set(&osb->alloc_stats.moves, 0); 2134 atomic_set(&osb->alloc_stats.local_data, 0); 2135 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2136 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2137 atomic_set(&osb->alloc_stats.bg_extends, 0); 2138 2139 /* Copy the blockcheck stats from the superblock probe */ 2140 osb->osb_ecc_stats = *stats; 2141 2142 ocfs2_init_node_maps(osb); 2143 2144 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2145 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2146 2147 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2148 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2149 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2150 osb->max_slots); 2151 status = -EINVAL; 2152 goto bail; 2153 } 2154 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 2155 2156 ocfs2_orphan_scan_init(osb); 2157 2158 status = ocfs2_recovery_init(osb); 2159 if (status) { 2160 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2161 mlog_errno(status); 2162 goto bail; 2163 } 2164 2165 init_waitqueue_head(&osb->checkpoint_event); 2166 atomic_set(&osb->needs_checkpoint, 0); 2167 2168 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2169 2170 osb->slot_num = OCFS2_INVALID_SLOT; 2171 2172 osb->s_xattr_inline_size = le16_to_cpu( 2173 di->id2.i_super.s_xattr_inline_size); 2174 2175 osb->local_alloc_state = OCFS2_LA_UNUSED; 2176 osb->local_alloc_bh = NULL; 2177 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2178 2179 init_waitqueue_head(&osb->osb_mount_event); 2180 2181 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2182 if (status) { 2183 mlog_errno(status); 2184 goto bail; 2185 } 2186 2187 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2188 if (!osb->vol_label) { 2189 mlog(ML_ERROR, "unable to alloc vol label\n"); 2190 status = -ENOMEM; 2191 goto bail; 2192 } 2193 2194 osb->slot_recovery_generations = 2195 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2196 GFP_KERNEL); 2197 if (!osb->slot_recovery_generations) { 2198 status = -ENOMEM; 2199 mlog_errno(status); 2200 goto bail; 2201 } 2202 2203 init_waitqueue_head(&osb->osb_wipe_event); 2204 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2205 sizeof(*osb->osb_orphan_wipes), 2206 GFP_KERNEL); 2207 if (!osb->osb_orphan_wipes) { 2208 status = -ENOMEM; 2209 mlog_errno(status); 2210 goto bail; 2211 } 2212 2213 osb->osb_rf_lock_tree = RB_ROOT; 2214 2215 osb->s_feature_compat = 2216 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2217 osb->s_feature_ro_compat = 2218 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2219 osb->s_feature_incompat = 2220 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2221 2222 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2223 mlog(ML_ERROR, "couldn't mount because of unsupported " 2224 "optional features (%x).\n", i); 2225 status = -EINVAL; 2226 goto bail; 2227 } 2228 if (!(osb->sb->s_flags & MS_RDONLY) && 2229 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2230 mlog(ML_ERROR, "couldn't mount RDWR because of " 2231 "unsupported optional features (%x).\n", i); 2232 status = -EINVAL; 2233 goto bail; 2234 } 2235 2236 if (ocfs2_clusterinfo_valid(osb)) { 2237 osb->osb_stackflags = 2238 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2239 memcpy(osb->osb_cluster_stack, 2240 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2241 OCFS2_STACK_LABEL_LEN); 2242 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2243 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2244 mlog(ML_ERROR, 2245 "couldn't mount because of an invalid " 2246 "cluster stack label (%s) \n", 2247 osb->osb_cluster_stack); 2248 status = -EINVAL; 2249 goto bail; 2250 } 2251 } else { 2252 /* The empty string is identical with classic tools that 2253 * don't know about s_cluster_info. */ 2254 osb->osb_cluster_stack[0] = '\0'; 2255 } 2256 2257 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2258 2259 /* FIXME 2260 * This should be done in ocfs2_journal_init(), but unknown 2261 * ordering issues will cause the filesystem to crash. 2262 * If anyone wants to figure out what part of the code 2263 * refers to osb->journal before ocfs2_journal_init() is run, 2264 * be my guest. 2265 */ 2266 /* initialize our journal structure */ 2267 2268 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2269 if (!journal) { 2270 mlog(ML_ERROR, "unable to alloc journal\n"); 2271 status = -ENOMEM; 2272 goto bail; 2273 } 2274 osb->journal = journal; 2275 journal->j_osb = osb; 2276 2277 atomic_set(&journal->j_num_trans, 0); 2278 init_rwsem(&journal->j_trans_barrier); 2279 init_waitqueue_head(&journal->j_checkpointed); 2280 spin_lock_init(&journal->j_lock); 2281 journal->j_trans_id = (unsigned long) 1; 2282 INIT_LIST_HEAD(&journal->j_la_cleanups); 2283 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2284 journal->j_state = OCFS2_JOURNAL_FREE; 2285 2286 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2287 osb->dentry_lock_list = NULL; 2288 2289 /* get some pseudo constants for clustersize bits */ 2290 osb->s_clustersize_bits = 2291 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2292 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2293 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 2294 2295 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2296 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2297 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2298 osb->s_clustersize); 2299 status = -EINVAL; 2300 goto bail; 2301 } 2302 2303 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2304 le32_to_cpu(di->i_clusters)); 2305 2306 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2307 total_blocks); 2308 if (status) { 2309 mlog(ML_ERROR, "Volume too large " 2310 "to mount safely on this system"); 2311 status = -EFBIG; 2312 goto bail; 2313 } 2314 2315 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2316 sizeof(di->id2.i_super.s_uuid))) { 2317 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2318 status = -ENOMEM; 2319 goto bail; 2320 } 2321 2322 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2323 2324 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2325 osb->vol_label[63] = '\0'; 2326 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2327 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2328 osb->first_cluster_group_blkno = 2329 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2330 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2331 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2332 mlog(0, "vol_label: %s\n", osb->vol_label); 2333 mlog(0, "uuid: %s\n", osb->uuid_str); 2334 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 2335 (unsigned long long)osb->root_blkno, 2336 (unsigned long long)osb->system_dir_blkno); 2337 2338 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2339 if (!osb->osb_dlm_debug) { 2340 status = -ENOMEM; 2341 mlog_errno(status); 2342 goto bail; 2343 } 2344 2345 atomic_set(&osb->vol_state, VOLUME_INIT); 2346 2347 /* load root, system_dir, and all global system inodes */ 2348 status = ocfs2_init_global_system_inodes(osb); 2349 if (status < 0) { 2350 mlog_errno(status); 2351 goto bail; 2352 } 2353 2354 /* 2355 * global bitmap 2356 */ 2357 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2358 OCFS2_INVALID_SLOT); 2359 if (!inode) { 2360 status = -EINVAL; 2361 mlog_errno(status); 2362 goto bail; 2363 } 2364 2365 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2366 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2367 iput(inode); 2368 2369 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2370 osb->s_feature_incompat) * 8; 2371 2372 status = ocfs2_init_slot_info(osb); 2373 if (status < 0) { 2374 mlog_errno(status); 2375 goto bail; 2376 } 2377 2378 bail: 2379 mlog_exit(status); 2380 return status; 2381 } 2382 2383 /* 2384 * will return: -EAGAIN if it is ok to keep searching for superblocks 2385 * -EINVAL if there is a bad superblock 2386 * 0 on success 2387 */ 2388 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2389 struct buffer_head *bh, 2390 u32 blksz, 2391 struct ocfs2_blockcheck_stats *stats) 2392 { 2393 int status = -EAGAIN; 2394 2395 mlog_entry_void(); 2396 2397 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2398 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2399 /* We have to do a raw check of the feature here */ 2400 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2401 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2402 status = ocfs2_block_check_validate(bh->b_data, 2403 bh->b_size, 2404 &di->i_check, 2405 stats); 2406 if (status) 2407 goto out; 2408 } 2409 status = -EINVAL; 2410 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2411 mlog(ML_ERROR, "found superblock with incorrect block " 2412 "size: found %u, should be %u\n", 2413 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2414 blksz); 2415 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2416 OCFS2_MAJOR_REV_LEVEL || 2417 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2418 OCFS2_MINOR_REV_LEVEL) { 2419 mlog(ML_ERROR, "found superblock with bad version: " 2420 "found %u.%u, should be %u.%u\n", 2421 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2422 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2423 OCFS2_MAJOR_REV_LEVEL, 2424 OCFS2_MINOR_REV_LEVEL); 2425 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2426 mlog(ML_ERROR, "bad block number on superblock: " 2427 "found %llu, should be %llu\n", 2428 (unsigned long long)le64_to_cpu(di->i_blkno), 2429 (unsigned long long)bh->b_blocknr); 2430 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2431 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2432 mlog(ML_ERROR, "bad cluster size found: %u\n", 2433 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2434 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2435 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2436 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2437 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2438 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2439 mlog(ML_ERROR, 2440 "Superblock slots found greater than file system " 2441 "maximum: found %u, max %u\n", 2442 le16_to_cpu(di->id2.i_super.s_max_slots), 2443 OCFS2_MAX_SLOTS); 2444 } else { 2445 /* found it! */ 2446 status = 0; 2447 } 2448 } 2449 2450 out: 2451 mlog_exit(status); 2452 return status; 2453 } 2454 2455 static int ocfs2_check_volume(struct ocfs2_super *osb) 2456 { 2457 int status; 2458 int dirty; 2459 int local; 2460 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2461 * recover 2462 * ourselves. */ 2463 2464 mlog_entry_void(); 2465 2466 /* Init our journal object. */ 2467 status = ocfs2_journal_init(osb->journal, &dirty); 2468 if (status < 0) { 2469 mlog(ML_ERROR, "Could not initialize journal!\n"); 2470 goto finally; 2471 } 2472 2473 /* Now that journal has been initialized, check to make sure 2474 entire volume is addressable. */ 2475 status = ocfs2_journal_addressable(osb); 2476 if (status) 2477 goto finally; 2478 2479 /* If the journal was unmounted cleanly then we don't want to 2480 * recover anything. Otherwise, journal_load will do that 2481 * dirty work for us :) */ 2482 if (!dirty) { 2483 status = ocfs2_journal_wipe(osb->journal, 0); 2484 if (status < 0) { 2485 mlog_errno(status); 2486 goto finally; 2487 } 2488 } else { 2489 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2490 "recovering volume.\n"); 2491 } 2492 2493 local = ocfs2_mount_local(osb); 2494 2495 /* will play back anything left in the journal. */ 2496 status = ocfs2_journal_load(osb->journal, local, dirty); 2497 if (status < 0) { 2498 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2499 goto finally; 2500 } 2501 2502 if (dirty) { 2503 /* recover my local alloc if we didn't unmount cleanly. */ 2504 status = ocfs2_begin_local_alloc_recovery(osb, 2505 osb->slot_num, 2506 &local_alloc); 2507 if (status < 0) { 2508 mlog_errno(status); 2509 goto finally; 2510 } 2511 /* we complete the recovery process after we've marked 2512 * ourselves as mounted. */ 2513 } 2514 2515 mlog(0, "Journal loaded.\n"); 2516 2517 status = ocfs2_load_local_alloc(osb); 2518 if (status < 0) { 2519 mlog_errno(status); 2520 goto finally; 2521 } 2522 2523 if (dirty) { 2524 /* Recovery will be completed after we've mounted the 2525 * rest of the volume. */ 2526 osb->dirty = 1; 2527 osb->local_alloc_copy = local_alloc; 2528 local_alloc = NULL; 2529 } 2530 2531 /* go through each journal, trylock it and if you get the 2532 * lock, and it's marked as dirty, set the bit in the recover 2533 * map and launch a recovery thread for it. */ 2534 status = ocfs2_mark_dead_nodes(osb); 2535 if (status < 0) { 2536 mlog_errno(status); 2537 goto finally; 2538 } 2539 2540 status = ocfs2_compute_replay_slots(osb); 2541 if (status < 0) 2542 mlog_errno(status); 2543 2544 finally: 2545 if (local_alloc) 2546 kfree(local_alloc); 2547 2548 mlog_exit(status); 2549 return status; 2550 } 2551 2552 /* 2553 * The routine gets called from dismount or close whenever a dismount on 2554 * volume is requested and the osb open count becomes 1. 2555 * It will remove the osb from the global list and also free up all the 2556 * initialized resources and fileobject. 2557 */ 2558 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2559 { 2560 mlog_entry_void(); 2561 2562 /* This function assumes that the caller has the main osb resource */ 2563 2564 ocfs2_free_slot_info(osb); 2565 2566 kfree(osb->osb_orphan_wipes); 2567 kfree(osb->slot_recovery_generations); 2568 /* FIXME 2569 * This belongs in journal shutdown, but because we have to 2570 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2571 * we free it here. 2572 */ 2573 kfree(osb->journal); 2574 if (osb->local_alloc_copy) 2575 kfree(osb->local_alloc_copy); 2576 kfree(osb->uuid_str); 2577 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2578 memset(osb, 0, sizeof(struct ocfs2_super)); 2579 2580 mlog_exit_void(); 2581 } 2582 2583 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2584 * panic(). We do not support continue-on-error operation. */ 2585 static void ocfs2_handle_error(struct super_block *sb) 2586 { 2587 struct ocfs2_super *osb = OCFS2_SB(sb); 2588 2589 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2590 panic("OCFS2: (device %s): panic forced after error\n", 2591 sb->s_id); 2592 2593 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2594 2595 if (sb->s_flags & MS_RDONLY && 2596 (ocfs2_is_soft_readonly(osb) || 2597 ocfs2_is_hard_readonly(osb))) 2598 return; 2599 2600 printk(KERN_CRIT "File system is now read-only due to the potential " 2601 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2602 "system is unmounted.\n"); 2603 sb->s_flags |= MS_RDONLY; 2604 ocfs2_set_ro_flag(osb, 0); 2605 } 2606 2607 static char error_buf[1024]; 2608 2609 void __ocfs2_error(struct super_block *sb, 2610 const char *function, 2611 const char *fmt, ...) 2612 { 2613 va_list args; 2614 2615 va_start(args, fmt); 2616 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2617 va_end(args); 2618 2619 /* Not using mlog here because we want to show the actual 2620 * function the error came from. */ 2621 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2622 sb->s_id, function, error_buf); 2623 2624 ocfs2_handle_error(sb); 2625 } 2626 2627 /* Handle critical errors. This is intentionally more drastic than 2628 * ocfs2_handle_error, so we only use for things like journal errors, 2629 * etc. */ 2630 void __ocfs2_abort(struct super_block* sb, 2631 const char *function, 2632 const char *fmt, ...) 2633 { 2634 va_list args; 2635 2636 va_start(args, fmt); 2637 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2638 va_end(args); 2639 2640 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2641 sb->s_id, function, error_buf); 2642 2643 /* We don't have the cluster support yet to go straight to 2644 * hard readonly in here. Until then, we want to keep 2645 * ocfs2_abort() so that we can at least mark critical 2646 * errors. 2647 * 2648 * TODO: This should abort the journal and alert other nodes 2649 * that our slot needs recovery. */ 2650 2651 /* Force a panic(). This stinks, but it's better than letting 2652 * things continue without having a proper hard readonly 2653 * here. */ 2654 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2655 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2656 ocfs2_handle_error(sb); 2657 } 2658 2659 /* 2660 * Void signal blockers, because in-kernel sigprocmask() only fails 2661 * when SIG_* is wrong. 2662 */ 2663 void ocfs2_block_signals(sigset_t *oldset) 2664 { 2665 int rc; 2666 sigset_t blocked; 2667 2668 sigfillset(&blocked); 2669 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2670 BUG_ON(rc); 2671 } 2672 2673 void ocfs2_unblock_signals(sigset_t *oldset) 2674 { 2675 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2676 BUG_ON(rc); 2677 } 2678 2679 module_init(ocfs2_init); 2680 module_exit(ocfs2_exit); 2681