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_err, 195 }; 196 197 static const match_table_t tokens = { 198 {Opt_barrier, "barrier=%u"}, 199 {Opt_err_panic, "errors=panic"}, 200 {Opt_err_ro, "errors=remount-ro"}, 201 {Opt_intr, "intr"}, 202 {Opt_nointr, "nointr"}, 203 {Opt_hb_none, OCFS2_HB_NONE}, 204 {Opt_hb_local, OCFS2_HB_LOCAL}, 205 {Opt_hb_global, OCFS2_HB_GLOBAL}, 206 {Opt_data_ordered, "data=ordered"}, 207 {Opt_data_writeback, "data=writeback"}, 208 {Opt_atime_quantum, "atime_quantum=%u"}, 209 {Opt_slot, "preferred_slot=%u"}, 210 {Opt_commit, "commit=%u"}, 211 {Opt_localalloc, "localalloc=%d"}, 212 {Opt_localflocks, "localflocks"}, 213 {Opt_stack, "cluster_stack=%s"}, 214 {Opt_user_xattr, "user_xattr"}, 215 {Opt_nouser_xattr, "nouser_xattr"}, 216 {Opt_inode64, "inode64"}, 217 {Opt_acl, "acl"}, 218 {Opt_noacl, "noacl"}, 219 {Opt_usrquota, "usrquota"}, 220 {Opt_grpquota, "grpquota"}, 221 {Opt_coherency_buffered, "coherency=buffered"}, 222 {Opt_coherency_full, "coherency=full"}, 223 {Opt_resv_level, "resv_level=%u"}, 224 {Opt_dir_resv_level, "dir_resv_level=%u"}, 225 {Opt_err, NULL} 226 }; 227 228 #ifdef CONFIG_DEBUG_FS 229 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 230 { 231 struct ocfs2_cluster_connection *cconn = osb->cconn; 232 struct ocfs2_recovery_map *rm = osb->recovery_map; 233 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 234 int i, out = 0; 235 236 out += snprintf(buf + out, len - out, 237 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 238 "Device", osb->dev_str, osb->uuid_str, 239 osb->fs_generation, osb->vol_label); 240 241 out += snprintf(buf + out, len - out, 242 "%10s => State: %d Flags: 0x%lX\n", "Volume", 243 atomic_read(&osb->vol_state), osb->osb_flags); 244 245 out += snprintf(buf + out, len - out, 246 "%10s => Block: %lu Cluster: %d\n", "Sizes", 247 osb->sb->s_blocksize, osb->s_clustersize); 248 249 out += snprintf(buf + out, len - out, 250 "%10s => Compat: 0x%X Incompat: 0x%X " 251 "ROcompat: 0x%X\n", 252 "Features", osb->s_feature_compat, 253 osb->s_feature_incompat, osb->s_feature_ro_compat); 254 255 out += snprintf(buf + out, len - out, 256 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 257 osb->s_mount_opt, osb->s_atime_quantum); 258 259 if (cconn) { 260 out += snprintf(buf + out, len - out, 261 "%10s => Stack: %s Name: %*s " 262 "Version: %d.%d\n", "Cluster", 263 (*osb->osb_cluster_stack == '\0' ? 264 "o2cb" : osb->osb_cluster_stack), 265 cconn->cc_namelen, cconn->cc_name, 266 cconn->cc_version.pv_major, 267 cconn->cc_version.pv_minor); 268 } 269 270 spin_lock(&osb->dc_task_lock); 271 out += snprintf(buf + out, len - out, 272 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 273 "WorkSeq: %lu\n", "DownCnvt", 274 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 275 osb->blocked_lock_count, osb->dc_wake_sequence, 276 osb->dc_work_sequence); 277 spin_unlock(&osb->dc_task_lock); 278 279 spin_lock(&osb->osb_lock); 280 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 281 "Recovery", 282 (osb->recovery_thread_task ? 283 task_pid_nr(osb->recovery_thread_task) : -1)); 284 if (rm->rm_used == 0) 285 out += snprintf(buf + out, len - out, " None\n"); 286 else { 287 for (i = 0; i < rm->rm_used; i++) 288 out += snprintf(buf + out, len - out, " %d", 289 rm->rm_entries[i]); 290 out += snprintf(buf + out, len - out, "\n"); 291 } 292 spin_unlock(&osb->osb_lock); 293 294 out += snprintf(buf + out, len - out, 295 "%10s => Pid: %d Interval: %lu\n", "Commit", 296 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 297 osb->osb_commit_interval); 298 299 out += snprintf(buf + out, len - out, 300 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 301 "Journal", osb->journal->j_state, 302 osb->journal->j_trans_id, 303 atomic_read(&osb->journal->j_num_trans)); 304 305 out += snprintf(buf + out, len - out, 306 "%10s => GlobalAllocs: %d LocalAllocs: %d " 307 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 308 "Stats", 309 atomic_read(&osb->alloc_stats.bitmap_data), 310 atomic_read(&osb->alloc_stats.local_data), 311 atomic_read(&osb->alloc_stats.bg_allocs), 312 atomic_read(&osb->alloc_stats.moves), 313 atomic_read(&osb->alloc_stats.bg_extends)); 314 315 out += snprintf(buf + out, len - out, 316 "%10s => State: %u Descriptor: %llu Size: %u bits " 317 "Default: %u bits\n", 318 "LocalAlloc", osb->local_alloc_state, 319 (unsigned long long)osb->la_last_gd, 320 osb->local_alloc_bits, osb->local_alloc_default_bits); 321 322 spin_lock(&osb->osb_lock); 323 out += snprintf(buf + out, len - out, 324 "%10s => InodeSlot: %d StolenInodes: %d, " 325 "MetaSlot: %d StolenMeta: %d\n", "Steal", 326 osb->s_inode_steal_slot, 327 atomic_read(&osb->s_num_inodes_stolen), 328 osb->s_meta_steal_slot, 329 atomic_read(&osb->s_num_meta_stolen)); 330 spin_unlock(&osb->osb_lock); 331 332 out += snprintf(buf + out, len - out, "OrphanScan => "); 333 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 334 os->os_count, os->os_seqno); 335 out += snprintf(buf + out, len - out, " Last Scan: "); 336 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 337 out += snprintf(buf + out, len - out, "Disabled\n"); 338 else 339 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 340 (get_seconds() - os->os_scantime.tv_sec)); 341 342 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 343 "Slots", "Num", "RecoGen"); 344 for (i = 0; i < osb->max_slots; ++i) { 345 out += snprintf(buf + out, len - out, 346 "%10s %c %3d %10d\n", 347 " ", 348 (i == osb->slot_num ? '*' : ' '), 349 i, osb->slot_recovery_generations[i]); 350 } 351 352 return out; 353 } 354 355 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 356 { 357 struct ocfs2_super *osb = inode->i_private; 358 char *buf = NULL; 359 360 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 361 if (!buf) 362 goto bail; 363 364 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 365 366 file->private_data = buf; 367 368 return 0; 369 bail: 370 return -ENOMEM; 371 } 372 373 static int ocfs2_debug_release(struct inode *inode, struct file *file) 374 { 375 kfree(file->private_data); 376 return 0; 377 } 378 379 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 380 size_t nbytes, loff_t *ppos) 381 { 382 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 383 i_size_read(file->f_mapping->host)); 384 } 385 #else 386 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 387 { 388 return 0; 389 } 390 static int ocfs2_debug_release(struct inode *inode, struct file *file) 391 { 392 return 0; 393 } 394 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 395 size_t nbytes, loff_t *ppos) 396 { 397 return 0; 398 } 399 #endif /* CONFIG_DEBUG_FS */ 400 401 static const struct file_operations ocfs2_osb_debug_fops = { 402 .open = ocfs2_osb_debug_open, 403 .release = ocfs2_debug_release, 404 .read = ocfs2_debug_read, 405 .llseek = generic_file_llseek, 406 }; 407 408 static int ocfs2_sync_fs(struct super_block *sb, int wait) 409 { 410 int status; 411 tid_t target; 412 struct ocfs2_super *osb = OCFS2_SB(sb); 413 414 if (ocfs2_is_hard_readonly(osb)) 415 return -EROFS; 416 417 if (wait) { 418 status = ocfs2_flush_truncate_log(osb); 419 if (status < 0) 420 mlog_errno(status); 421 } else { 422 ocfs2_schedule_truncate_log_flush(osb, 0); 423 } 424 425 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 426 &target)) { 427 if (wait) 428 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 429 target); 430 } 431 return 0; 432 } 433 434 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 435 { 436 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 437 && (ino == USER_QUOTA_SYSTEM_INODE 438 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 439 return 0; 440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 441 && (ino == GROUP_QUOTA_SYSTEM_INODE 442 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 443 return 0; 444 return 1; 445 } 446 447 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 448 { 449 struct inode *new = NULL; 450 int status = 0; 451 int i; 452 453 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 454 if (IS_ERR(new)) { 455 status = PTR_ERR(new); 456 mlog_errno(status); 457 goto bail; 458 } 459 osb->root_inode = new; 460 461 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 462 if (IS_ERR(new)) { 463 status = PTR_ERR(new); 464 mlog_errno(status); 465 goto bail; 466 } 467 osb->sys_root_inode = new; 468 469 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 470 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 471 if (!ocfs2_need_system_inode(osb, i)) 472 continue; 473 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 474 if (!new) { 475 ocfs2_release_system_inodes(osb); 476 status = -EINVAL; 477 mlog_errno(status); 478 /* FIXME: Should ERROR_RO_FS */ 479 mlog(ML_ERROR, "Unable to load system inode %d, " 480 "possibly corrupt fs?", i); 481 goto bail; 482 } 483 // the array now has one ref, so drop this one 484 iput(new); 485 } 486 487 bail: 488 if (status) 489 mlog_errno(status); 490 return status; 491 } 492 493 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 494 { 495 struct inode *new = NULL; 496 int status = 0; 497 int i; 498 499 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 500 i < NUM_SYSTEM_INODES; 501 i++) { 502 if (!ocfs2_need_system_inode(osb, i)) 503 continue; 504 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 505 if (!new) { 506 ocfs2_release_system_inodes(osb); 507 status = -EINVAL; 508 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 509 status, i, osb->slot_num); 510 goto bail; 511 } 512 /* the array now has one ref, so drop this one */ 513 iput(new); 514 } 515 516 bail: 517 if (status) 518 mlog_errno(status); 519 return status; 520 } 521 522 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 523 { 524 int i; 525 struct inode *inode; 526 527 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 528 inode = osb->global_system_inodes[i]; 529 if (inode) { 530 iput(inode); 531 osb->global_system_inodes[i] = NULL; 532 } 533 } 534 535 inode = osb->sys_root_inode; 536 if (inode) { 537 iput(inode); 538 osb->sys_root_inode = NULL; 539 } 540 541 inode = osb->root_inode; 542 if (inode) { 543 iput(inode); 544 osb->root_inode = NULL; 545 } 546 547 if (!osb->local_system_inodes) 548 return; 549 550 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 551 if (osb->local_system_inodes[i]) { 552 iput(osb->local_system_inodes[i]); 553 osb->local_system_inodes[i] = NULL; 554 } 555 } 556 557 kfree(osb->local_system_inodes); 558 osb->local_system_inodes = NULL; 559 } 560 561 /* We're allocating fs objects, use GFP_NOFS */ 562 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 563 { 564 struct ocfs2_inode_info *oi; 565 566 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 567 if (!oi) 568 return NULL; 569 570 oi->i_sync_tid = 0; 571 oi->i_datasync_tid = 0; 572 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 573 574 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 575 return &oi->vfs_inode; 576 } 577 578 static void ocfs2_i_callback(struct rcu_head *head) 579 { 580 struct inode *inode = container_of(head, struct inode, i_rcu); 581 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 582 } 583 584 static void ocfs2_destroy_inode(struct inode *inode) 585 { 586 call_rcu(&inode->i_rcu, ocfs2_i_callback); 587 } 588 589 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 590 unsigned int cbits) 591 { 592 unsigned int bytes = 1 << cbits; 593 unsigned int trim = bytes; 594 unsigned int bitshift = 32; 595 596 /* 597 * i_size and all block offsets in ocfs2 are always 64 bits 598 * wide. i_clusters is 32 bits, in cluster-sized units. So on 599 * 64 bit platforms, cluster size will be the limiting factor. 600 */ 601 602 #if BITS_PER_LONG == 32 603 # if defined(CONFIG_LBDAF) 604 BUILD_BUG_ON(sizeof(sector_t) != 8); 605 /* 606 * We might be limited by page cache size. 607 */ 608 if (bytes > PAGE_CACHE_SIZE) { 609 bytes = PAGE_CACHE_SIZE; 610 trim = 1; 611 /* 612 * Shift by 31 here so that we don't get larger than 613 * MAX_LFS_FILESIZE 614 */ 615 bitshift = 31; 616 } 617 # else 618 /* 619 * We are limited by the size of sector_t. Use block size, as 620 * that's what we expose to the VFS. 621 */ 622 bytes = 1 << bbits; 623 trim = 1; 624 bitshift = 31; 625 # endif 626 #endif 627 628 /* 629 * Trim by a whole cluster when we can actually approach the 630 * on-disk limits. Otherwise we can overflow i_clusters when 631 * an extent start is at the max offset. 632 */ 633 return (((unsigned long long)bytes) << bitshift) - trim; 634 } 635 636 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 637 { 638 int incompat_features; 639 int ret = 0; 640 struct mount_options parsed_options; 641 struct ocfs2_super *osb = OCFS2_SB(sb); 642 u32 tmp; 643 644 sync_filesystem(sb); 645 646 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 647 !ocfs2_check_set_options(sb, &parsed_options)) { 648 ret = -EINVAL; 649 goto out; 650 } 651 652 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 653 OCFS2_MOUNT_HB_NONE; 654 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 655 ret = -EINVAL; 656 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 657 goto out; 658 } 659 660 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 661 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 662 ret = -EINVAL; 663 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 664 goto out; 665 } 666 667 /* Probably don't want this on remount; it might 668 * mess with other nodes */ 669 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 670 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 671 ret = -EINVAL; 672 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 673 goto out; 674 } 675 676 /* We're going to/from readonly mode. */ 677 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 678 /* Disable quota accounting before remounting RO */ 679 if (*flags & MS_RDONLY) { 680 ret = ocfs2_susp_quotas(osb, 0); 681 if (ret < 0) 682 goto out; 683 } 684 /* Lock here so the check of HARD_RO and the potential 685 * setting of SOFT_RO is atomic. */ 686 spin_lock(&osb->osb_lock); 687 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 688 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 689 ret = -EROFS; 690 goto unlock_osb; 691 } 692 693 if (*flags & MS_RDONLY) { 694 sb->s_flags |= MS_RDONLY; 695 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 696 } else { 697 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 698 mlog(ML_ERROR, "Cannot remount RDWR " 699 "filesystem due to previous errors.\n"); 700 ret = -EROFS; 701 goto unlock_osb; 702 } 703 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 704 if (incompat_features) { 705 mlog(ML_ERROR, "Cannot remount RDWR because " 706 "of unsupported optional features " 707 "(%x).\n", incompat_features); 708 ret = -EINVAL; 709 goto unlock_osb; 710 } 711 sb->s_flags &= ~MS_RDONLY; 712 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 713 } 714 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 715 unlock_osb: 716 spin_unlock(&osb->osb_lock); 717 /* Enable quota accounting after remounting RW */ 718 if (!ret && !(*flags & MS_RDONLY)) { 719 if (sb_any_quota_suspended(sb)) 720 ret = ocfs2_susp_quotas(osb, 1); 721 else 722 ret = ocfs2_enable_quotas(osb); 723 if (ret < 0) { 724 /* Return back changes... */ 725 spin_lock(&osb->osb_lock); 726 sb->s_flags |= MS_RDONLY; 727 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 728 spin_unlock(&osb->osb_lock); 729 goto out; 730 } 731 } 732 } 733 734 if (!ret) { 735 /* Only save off the new mount options in case of a successful 736 * remount. */ 737 osb->s_mount_opt = parsed_options.mount_opt; 738 osb->s_atime_quantum = parsed_options.atime_quantum; 739 osb->preferred_slot = parsed_options.slot; 740 if (parsed_options.commit_interval) 741 osb->osb_commit_interval = parsed_options.commit_interval; 742 743 if (!ocfs2_is_hard_readonly(osb)) 744 ocfs2_set_journal_params(osb); 745 746 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 747 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 748 MS_POSIXACL : 0); 749 } 750 out: 751 return ret; 752 } 753 754 static int ocfs2_sb_probe(struct super_block *sb, 755 struct buffer_head **bh, 756 int *sector_size, 757 struct ocfs2_blockcheck_stats *stats) 758 { 759 int status, tmpstat; 760 struct ocfs1_vol_disk_hdr *hdr; 761 struct ocfs2_dinode *di; 762 int blksize; 763 764 *bh = NULL; 765 766 /* may be > 512 */ 767 *sector_size = bdev_logical_block_size(sb->s_bdev); 768 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 769 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 770 *sector_size, OCFS2_MAX_BLOCKSIZE); 771 status = -EINVAL; 772 goto bail; 773 } 774 775 /* Can this really happen? */ 776 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 777 *sector_size = OCFS2_MIN_BLOCKSIZE; 778 779 /* check block zero for old format */ 780 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 781 if (status < 0) { 782 mlog_errno(status); 783 goto bail; 784 } 785 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 786 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 787 mlog(ML_ERROR, "incompatible version: %u.%u\n", 788 hdr->major_version, hdr->minor_version); 789 status = -EINVAL; 790 } 791 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 792 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 793 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 794 hdr->signature); 795 status = -EINVAL; 796 } 797 brelse(*bh); 798 *bh = NULL; 799 if (status < 0) { 800 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 801 "upgraded before mounting with ocfs v2\n"); 802 goto bail; 803 } 804 805 /* 806 * Now check at magic offset for 512, 1024, 2048, 4096 807 * blocksizes. 4096 is the maximum blocksize because it is 808 * the minimum clustersize. 809 */ 810 status = -EINVAL; 811 for (blksize = *sector_size; 812 blksize <= OCFS2_MAX_BLOCKSIZE; 813 blksize <<= 1) { 814 tmpstat = ocfs2_get_sector(sb, bh, 815 OCFS2_SUPER_BLOCK_BLKNO, 816 blksize); 817 if (tmpstat < 0) { 818 status = tmpstat; 819 mlog_errno(status); 820 break; 821 } 822 di = (struct ocfs2_dinode *) (*bh)->b_data; 823 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 824 spin_lock_init(&stats->b_lock); 825 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 826 if (tmpstat < 0) { 827 brelse(*bh); 828 *bh = NULL; 829 } 830 if (tmpstat != -EAGAIN) { 831 status = tmpstat; 832 break; 833 } 834 } 835 836 bail: 837 return status; 838 } 839 840 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 841 { 842 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 843 844 if (osb->s_mount_opt & hb_enabled) { 845 if (ocfs2_mount_local(osb)) { 846 mlog(ML_ERROR, "Cannot heartbeat on a locally " 847 "mounted device.\n"); 848 return -EINVAL; 849 } 850 if (ocfs2_userspace_stack(osb)) { 851 mlog(ML_ERROR, "Userspace stack expected, but " 852 "o2cb heartbeat arguments passed to mount\n"); 853 return -EINVAL; 854 } 855 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 856 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 857 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 858 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 859 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 860 return -EINVAL; 861 } 862 } 863 864 if (!(osb->s_mount_opt & hb_enabled)) { 865 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 866 !ocfs2_userspace_stack(osb)) { 867 mlog(ML_ERROR, "Heartbeat has to be started to mount " 868 "a read-write clustered device.\n"); 869 return -EINVAL; 870 } 871 } 872 873 return 0; 874 } 875 876 /* 877 * If we're using a userspace stack, mount should have passed 878 * a name that matches the disk. If not, mount should not 879 * have passed a stack. 880 */ 881 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 882 struct mount_options *mopt) 883 { 884 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 885 mlog(ML_ERROR, 886 "cluster stack passed to mount, but this filesystem " 887 "does not support it\n"); 888 return -EINVAL; 889 } 890 891 if (ocfs2_userspace_stack(osb) && 892 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 893 OCFS2_STACK_LABEL_LEN)) { 894 mlog(ML_ERROR, 895 "cluster stack passed to mount (\"%s\") does not " 896 "match the filesystem (\"%s\")\n", 897 mopt->cluster_stack, 898 osb->osb_cluster_stack); 899 return -EINVAL; 900 } 901 902 return 0; 903 } 904 905 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 906 { 907 int type; 908 struct super_block *sb = osb->sb; 909 unsigned int feature[OCFS2_MAXQUOTAS] = { 910 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 911 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 912 int status = 0; 913 914 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 915 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 916 continue; 917 if (unsuspend) 918 status = dquot_resume(sb, type); 919 else { 920 struct ocfs2_mem_dqinfo *oinfo; 921 922 /* Cancel periodic syncing before suspending */ 923 oinfo = sb_dqinfo(sb, type)->dqi_priv; 924 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 925 status = dquot_suspend(sb, type); 926 } 927 if (status < 0) 928 break; 929 } 930 if (status < 0) 931 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 932 "remount (error = %d).\n", status); 933 return status; 934 } 935 936 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 937 { 938 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 939 struct super_block *sb = osb->sb; 940 unsigned int feature[OCFS2_MAXQUOTAS] = { 941 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 942 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 943 unsigned int ino[OCFS2_MAXQUOTAS] = { 944 LOCAL_USER_QUOTA_SYSTEM_INODE, 945 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 946 int status; 947 int type; 948 949 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 950 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 951 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 952 continue; 953 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 954 osb->slot_num); 955 if (!inode[type]) { 956 status = -ENOENT; 957 goto out_quota_off; 958 } 959 status = dquot_enable(inode[type], type, QFMT_OCFS2, 960 DQUOT_USAGE_ENABLED); 961 if (status < 0) 962 goto out_quota_off; 963 } 964 965 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 966 iput(inode[type]); 967 return 0; 968 out_quota_off: 969 ocfs2_disable_quotas(osb); 970 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 971 iput(inode[type]); 972 mlog_errno(status); 973 return status; 974 } 975 976 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 977 { 978 int type; 979 struct inode *inode; 980 struct super_block *sb = osb->sb; 981 struct ocfs2_mem_dqinfo *oinfo; 982 983 /* We mostly ignore errors in this function because there's not much 984 * we can do when we see them */ 985 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 986 if (!sb_has_quota_loaded(sb, type)) 987 continue; 988 /* Cancel periodic syncing before we grab dqonoff_mutex */ 989 oinfo = sb_dqinfo(sb, type)->dqi_priv; 990 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 991 inode = igrab(sb->s_dquot.files[type]); 992 /* Turn off quotas. This will remove all dquot structures from 993 * memory and so they will be automatically synced to global 994 * quota files */ 995 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 996 DQUOT_LIMITS_ENABLED); 997 if (!inode) 998 continue; 999 iput(inode); 1000 } 1001 } 1002 1003 /* Handle quota on quotactl */ 1004 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id) 1005 { 1006 unsigned int feature[OCFS2_MAXQUOTAS] = { 1007 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 1008 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 1009 1010 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 1011 return -EINVAL; 1012 1013 return dquot_enable(sb_dqopt(sb)->files[type], type, 1014 format_id, DQUOT_LIMITS_ENABLED); 1015 } 1016 1017 /* Handle quota off quotactl */ 1018 static int ocfs2_quota_off(struct super_block *sb, int type) 1019 { 1020 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 1021 } 1022 1023 static const struct quotactl_ops ocfs2_quotactl_ops = { 1024 .quota_on_meta = ocfs2_quota_on, 1025 .quota_off = ocfs2_quota_off, 1026 .quota_sync = dquot_quota_sync, 1027 .get_info = dquot_get_dqinfo, 1028 .set_info = dquot_set_dqinfo, 1029 .get_dqblk = dquot_get_dqblk, 1030 .set_dqblk = dquot_set_dqblk, 1031 }; 1032 1033 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1034 { 1035 struct dentry *root; 1036 int status, sector_size; 1037 struct mount_options parsed_options; 1038 struct inode *inode = NULL; 1039 struct ocfs2_super *osb = NULL; 1040 struct buffer_head *bh = NULL; 1041 char nodestr[12]; 1042 struct ocfs2_blockcheck_stats stats; 1043 1044 trace_ocfs2_fill_super(sb, data, silent); 1045 1046 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1047 status = -EINVAL; 1048 goto read_super_error; 1049 } 1050 1051 /* probe for superblock */ 1052 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1053 if (status < 0) { 1054 mlog(ML_ERROR, "superblock probe failed!\n"); 1055 goto read_super_error; 1056 } 1057 1058 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1059 osb = OCFS2_SB(sb); 1060 if (status < 0) { 1061 mlog_errno(status); 1062 goto read_super_error; 1063 } 1064 brelse(bh); 1065 bh = NULL; 1066 1067 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1068 status = -EINVAL; 1069 goto read_super_error; 1070 } 1071 osb->s_mount_opt = parsed_options.mount_opt; 1072 osb->s_atime_quantum = parsed_options.atime_quantum; 1073 osb->preferred_slot = parsed_options.slot; 1074 osb->osb_commit_interval = parsed_options.commit_interval; 1075 1076 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1077 osb->osb_resv_level = parsed_options.resv_level; 1078 osb->osb_dir_resv_level = parsed_options.resv_level; 1079 if (parsed_options.dir_resv_level == -1) 1080 osb->osb_dir_resv_level = parsed_options.resv_level; 1081 else 1082 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1083 1084 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1085 if (status) 1086 goto read_super_error; 1087 1088 sb->s_magic = OCFS2_SUPER_MAGIC; 1089 1090 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1091 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1092 1093 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1094 * heartbeat=none */ 1095 if (bdev_read_only(sb->s_bdev)) { 1096 if (!(sb->s_flags & MS_RDONLY)) { 1097 status = -EACCES; 1098 mlog(ML_ERROR, "Readonly device detected but readonly " 1099 "mount was not specified.\n"); 1100 goto read_super_error; 1101 } 1102 1103 /* You should not be able to start a local heartbeat 1104 * on a readonly device. */ 1105 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1106 status = -EROFS; 1107 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1108 "device.\n"); 1109 goto read_super_error; 1110 } 1111 1112 status = ocfs2_check_journals_nolocks(osb); 1113 if (status < 0) { 1114 if (status == -EROFS) 1115 mlog(ML_ERROR, "Recovery required on readonly " 1116 "file system, but write access is " 1117 "unavailable.\n"); 1118 else 1119 mlog_errno(status); 1120 goto read_super_error; 1121 } 1122 1123 ocfs2_set_ro_flag(osb, 1); 1124 1125 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1126 "Cluster services will not be used for this mount. " 1127 "Recovery will be skipped.\n", osb->dev_str); 1128 } 1129 1130 if (!ocfs2_is_hard_readonly(osb)) { 1131 if (sb->s_flags & MS_RDONLY) 1132 ocfs2_set_ro_flag(osb, 0); 1133 } 1134 1135 status = ocfs2_verify_heartbeat(osb); 1136 if (status < 0) { 1137 mlog_errno(status); 1138 goto read_super_error; 1139 } 1140 1141 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1142 ocfs2_debugfs_root); 1143 if (!osb->osb_debug_root) { 1144 status = -EINVAL; 1145 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1146 goto read_super_error; 1147 } 1148 1149 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1150 osb->osb_debug_root, 1151 osb, 1152 &ocfs2_osb_debug_fops); 1153 if (!osb->osb_ctxt) { 1154 status = -EINVAL; 1155 mlog_errno(status); 1156 goto read_super_error; 1157 } 1158 1159 if (ocfs2_meta_ecc(osb)) { 1160 status = ocfs2_blockcheck_stats_debugfs_install( 1161 &osb->osb_ecc_stats, 1162 osb->osb_debug_root); 1163 if (status) { 1164 mlog(ML_ERROR, 1165 "Unable to create blockcheck statistics " 1166 "files\n"); 1167 goto read_super_error; 1168 } 1169 } 1170 1171 status = ocfs2_mount_volume(sb); 1172 if (status < 0) 1173 goto read_super_error; 1174 1175 if (osb->root_inode) 1176 inode = igrab(osb->root_inode); 1177 1178 if (!inode) { 1179 status = -EIO; 1180 mlog_errno(status); 1181 goto read_super_error; 1182 } 1183 1184 root = d_make_root(inode); 1185 if (!root) { 1186 status = -ENOMEM; 1187 mlog_errno(status); 1188 goto read_super_error; 1189 } 1190 1191 sb->s_root = root; 1192 1193 ocfs2_complete_mount_recovery(osb); 1194 1195 if (ocfs2_mount_local(osb)) 1196 snprintf(nodestr, sizeof(nodestr), "local"); 1197 else 1198 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1199 1200 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1201 "with %s data mode.\n", 1202 osb->dev_str, nodestr, osb->slot_num, 1203 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1204 "ordered"); 1205 1206 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1207 wake_up(&osb->osb_mount_event); 1208 1209 /* Now we can initialize quotas because we can afford to wait 1210 * for cluster locks recovery now. That also means that truncation 1211 * log recovery can happen but that waits for proper quota setup */ 1212 if (!(sb->s_flags & MS_RDONLY)) { 1213 status = ocfs2_enable_quotas(osb); 1214 if (status < 0) { 1215 /* We have to err-out specially here because 1216 * s_root is already set */ 1217 mlog_errno(status); 1218 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1219 wake_up(&osb->osb_mount_event); 1220 return status; 1221 } 1222 } 1223 1224 ocfs2_complete_quota_recovery(osb); 1225 1226 /* Now we wake up again for processes waiting for quotas */ 1227 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1228 wake_up(&osb->osb_mount_event); 1229 1230 /* Start this when the mount is almost sure of being successful */ 1231 ocfs2_orphan_scan_start(osb); 1232 1233 return status; 1234 1235 read_super_error: 1236 brelse(bh); 1237 1238 if (osb) { 1239 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1240 wake_up(&osb->osb_mount_event); 1241 ocfs2_dismount_volume(sb, 1); 1242 } 1243 1244 if (status) 1245 mlog_errno(status); 1246 return status; 1247 } 1248 1249 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1250 int flags, 1251 const char *dev_name, 1252 void *data) 1253 { 1254 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1255 } 1256 1257 static struct file_system_type ocfs2_fs_type = { 1258 .owner = THIS_MODULE, 1259 .name = "ocfs2", 1260 .mount = ocfs2_mount, 1261 .kill_sb = kill_block_super, 1262 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1263 .next = NULL 1264 }; 1265 MODULE_ALIAS_FS("ocfs2"); 1266 1267 static int ocfs2_check_set_options(struct super_block *sb, 1268 struct mount_options *options) 1269 { 1270 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1271 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1272 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1273 mlog(ML_ERROR, "User quotas were requested, but this " 1274 "filesystem does not have the feature enabled.\n"); 1275 return 0; 1276 } 1277 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1278 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1279 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1280 mlog(ML_ERROR, "Group quotas were requested, but this " 1281 "filesystem does not have the feature enabled.\n"); 1282 return 0; 1283 } 1284 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1285 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1286 mlog(ML_ERROR, "ACL support requested but extended attributes " 1287 "feature is not enabled\n"); 1288 return 0; 1289 } 1290 /* No ACL setting specified? Use XATTR feature... */ 1291 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1292 OCFS2_MOUNT_NO_POSIX_ACL))) { 1293 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1294 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1295 else 1296 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1297 } 1298 return 1; 1299 } 1300 1301 static int ocfs2_parse_options(struct super_block *sb, 1302 char *options, 1303 struct mount_options *mopt, 1304 int is_remount) 1305 { 1306 int status, user_stack = 0; 1307 char *p; 1308 u32 tmp; 1309 1310 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1311 1312 mopt->commit_interval = 0; 1313 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1314 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1315 mopt->slot = OCFS2_INVALID_SLOT; 1316 mopt->localalloc_opt = -1; 1317 mopt->cluster_stack[0] = '\0'; 1318 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1319 mopt->dir_resv_level = -1; 1320 1321 if (!options) { 1322 status = 1; 1323 goto bail; 1324 } 1325 1326 while ((p = strsep(&options, ",")) != NULL) { 1327 int token, option; 1328 substring_t args[MAX_OPT_ARGS]; 1329 1330 if (!*p) 1331 continue; 1332 1333 token = match_token(p, tokens, args); 1334 switch (token) { 1335 case Opt_hb_local: 1336 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1337 break; 1338 case Opt_hb_none: 1339 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1340 break; 1341 case Opt_hb_global: 1342 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1343 break; 1344 case Opt_barrier: 1345 if (match_int(&args[0], &option)) { 1346 status = 0; 1347 goto bail; 1348 } 1349 if (option) 1350 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1351 else 1352 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1353 break; 1354 case Opt_intr: 1355 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1356 break; 1357 case Opt_nointr: 1358 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1359 break; 1360 case Opt_err_panic: 1361 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1362 break; 1363 case Opt_err_ro: 1364 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1365 break; 1366 case Opt_data_ordered: 1367 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1368 break; 1369 case Opt_data_writeback: 1370 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1371 break; 1372 case Opt_user_xattr: 1373 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1374 break; 1375 case Opt_nouser_xattr: 1376 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1377 break; 1378 case Opt_atime_quantum: 1379 if (match_int(&args[0], &option)) { 1380 status = 0; 1381 goto bail; 1382 } 1383 if (option >= 0) 1384 mopt->atime_quantum = option; 1385 break; 1386 case Opt_slot: 1387 option = 0; 1388 if (match_int(&args[0], &option)) { 1389 status = 0; 1390 goto bail; 1391 } 1392 if (option) 1393 mopt->slot = (s16)option; 1394 break; 1395 case Opt_commit: 1396 option = 0; 1397 if (match_int(&args[0], &option)) { 1398 status = 0; 1399 goto bail; 1400 } 1401 if (option < 0) 1402 return 0; 1403 if (option == 0) 1404 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1405 mopt->commit_interval = HZ * option; 1406 break; 1407 case Opt_localalloc: 1408 option = 0; 1409 if (match_int(&args[0], &option)) { 1410 status = 0; 1411 goto bail; 1412 } 1413 if (option >= 0) 1414 mopt->localalloc_opt = option; 1415 break; 1416 case Opt_localflocks: 1417 /* 1418 * Changing this during remount could race 1419 * flock() requests, or "unbalance" existing 1420 * ones (e.g., a lock is taken in one mode but 1421 * dropped in the other). If users care enough 1422 * to flip locking modes during remount, we 1423 * could add a "local" flag to individual 1424 * flock structures for proper tracking of 1425 * state. 1426 */ 1427 if (!is_remount) 1428 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1429 break; 1430 case Opt_stack: 1431 /* Check both that the option we were passed 1432 * is of the right length and that it is a proper 1433 * string of the right length. 1434 */ 1435 if (((args[0].to - args[0].from) != 1436 OCFS2_STACK_LABEL_LEN) || 1437 (strnlen(args[0].from, 1438 OCFS2_STACK_LABEL_LEN) != 1439 OCFS2_STACK_LABEL_LEN)) { 1440 mlog(ML_ERROR, 1441 "Invalid cluster_stack option\n"); 1442 status = 0; 1443 goto bail; 1444 } 1445 memcpy(mopt->cluster_stack, args[0].from, 1446 OCFS2_STACK_LABEL_LEN); 1447 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1448 /* 1449 * Open code the memcmp here as we don't have 1450 * an osb to pass to 1451 * ocfs2_userspace_stack(). 1452 */ 1453 if (memcmp(mopt->cluster_stack, 1454 OCFS2_CLASSIC_CLUSTER_STACK, 1455 OCFS2_STACK_LABEL_LEN)) 1456 user_stack = 1; 1457 break; 1458 case Opt_inode64: 1459 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1460 break; 1461 case Opt_usrquota: 1462 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1463 break; 1464 case Opt_grpquota: 1465 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1466 break; 1467 case Opt_coherency_buffered: 1468 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1469 break; 1470 case Opt_coherency_full: 1471 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1472 break; 1473 case Opt_acl: 1474 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1475 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1476 break; 1477 case Opt_noacl: 1478 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1479 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1480 break; 1481 case Opt_resv_level: 1482 if (is_remount) 1483 break; 1484 if (match_int(&args[0], &option)) { 1485 status = 0; 1486 goto bail; 1487 } 1488 if (option >= OCFS2_MIN_RESV_LEVEL && 1489 option < OCFS2_MAX_RESV_LEVEL) 1490 mopt->resv_level = option; 1491 break; 1492 case Opt_dir_resv_level: 1493 if (is_remount) 1494 break; 1495 if (match_int(&args[0], &option)) { 1496 status = 0; 1497 goto bail; 1498 } 1499 if (option >= OCFS2_MIN_RESV_LEVEL && 1500 option < OCFS2_MAX_RESV_LEVEL) 1501 mopt->dir_resv_level = option; 1502 break; 1503 default: 1504 mlog(ML_ERROR, 1505 "Unrecognized mount option \"%s\" " 1506 "or missing value\n", p); 1507 status = 0; 1508 goto bail; 1509 } 1510 } 1511 1512 if (user_stack == 0) { 1513 /* Ensure only one heartbeat mode */ 1514 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1515 OCFS2_MOUNT_HB_GLOBAL | 1516 OCFS2_MOUNT_HB_NONE); 1517 if (hweight32(tmp) != 1) { 1518 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1519 status = 0; 1520 goto bail; 1521 } 1522 } 1523 1524 status = 1; 1525 1526 bail: 1527 return status; 1528 } 1529 1530 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1531 { 1532 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1533 unsigned long opts = osb->s_mount_opt; 1534 unsigned int local_alloc_megs; 1535 1536 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1537 seq_printf(s, ",_netdev"); 1538 if (opts & OCFS2_MOUNT_HB_LOCAL) 1539 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1540 else 1541 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1542 } else 1543 seq_printf(s, ",%s", OCFS2_HB_NONE); 1544 1545 if (opts & OCFS2_MOUNT_NOINTR) 1546 seq_printf(s, ",nointr"); 1547 1548 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1549 seq_printf(s, ",data=writeback"); 1550 else 1551 seq_printf(s, ",data=ordered"); 1552 1553 if (opts & OCFS2_MOUNT_BARRIER) 1554 seq_printf(s, ",barrier=1"); 1555 1556 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1557 seq_printf(s, ",errors=panic"); 1558 else 1559 seq_printf(s, ",errors=remount-ro"); 1560 1561 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1562 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1563 1564 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1565 1566 if (osb->osb_commit_interval) 1567 seq_printf(s, ",commit=%u", 1568 (unsigned) (osb->osb_commit_interval / HZ)); 1569 1570 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1571 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1572 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1573 1574 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1575 seq_printf(s, ",localflocks,"); 1576 1577 if (osb->osb_cluster_stack[0]) 1578 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1579 osb->osb_cluster_stack); 1580 if (opts & OCFS2_MOUNT_USRQUOTA) 1581 seq_printf(s, ",usrquota"); 1582 if (opts & OCFS2_MOUNT_GRPQUOTA) 1583 seq_printf(s, ",grpquota"); 1584 1585 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1586 seq_printf(s, ",coherency=buffered"); 1587 else 1588 seq_printf(s, ",coherency=full"); 1589 1590 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1591 seq_printf(s, ",nouser_xattr"); 1592 else 1593 seq_printf(s, ",user_xattr"); 1594 1595 if (opts & OCFS2_MOUNT_INODE64) 1596 seq_printf(s, ",inode64"); 1597 1598 if (opts & OCFS2_MOUNT_POSIX_ACL) 1599 seq_printf(s, ",acl"); 1600 else 1601 seq_printf(s, ",noacl"); 1602 1603 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1604 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1605 1606 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1607 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1608 1609 return 0; 1610 } 1611 1612 static int __init ocfs2_init(void) 1613 { 1614 int status; 1615 1616 status = init_ocfs2_uptodate_cache(); 1617 if (status < 0) 1618 goto out1; 1619 1620 status = ocfs2_initialize_mem_caches(); 1621 if (status < 0) 1622 goto out2; 1623 1624 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1625 if (!ocfs2_wq) { 1626 status = -ENOMEM; 1627 goto out3; 1628 } 1629 1630 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1631 if (!ocfs2_debugfs_root) { 1632 status = -ENOMEM; 1633 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1634 goto out4; 1635 } 1636 1637 ocfs2_set_locking_protocol(); 1638 1639 status = register_quota_format(&ocfs2_quota_format); 1640 if (status < 0) 1641 goto out4; 1642 status = register_filesystem(&ocfs2_fs_type); 1643 if (!status) 1644 return 0; 1645 1646 unregister_quota_format(&ocfs2_quota_format); 1647 out4: 1648 destroy_workqueue(ocfs2_wq); 1649 debugfs_remove(ocfs2_debugfs_root); 1650 out3: 1651 ocfs2_free_mem_caches(); 1652 out2: 1653 exit_ocfs2_uptodate_cache(); 1654 out1: 1655 mlog_errno(status); 1656 return status; 1657 } 1658 1659 static void __exit ocfs2_exit(void) 1660 { 1661 if (ocfs2_wq) { 1662 flush_workqueue(ocfs2_wq); 1663 destroy_workqueue(ocfs2_wq); 1664 } 1665 1666 unregister_quota_format(&ocfs2_quota_format); 1667 1668 debugfs_remove(ocfs2_debugfs_root); 1669 1670 ocfs2_free_mem_caches(); 1671 1672 unregister_filesystem(&ocfs2_fs_type); 1673 1674 exit_ocfs2_uptodate_cache(); 1675 } 1676 1677 static void ocfs2_put_super(struct super_block *sb) 1678 { 1679 trace_ocfs2_put_super(sb); 1680 1681 ocfs2_sync_blockdev(sb); 1682 ocfs2_dismount_volume(sb, 0); 1683 } 1684 1685 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1686 { 1687 struct ocfs2_super *osb; 1688 u32 numbits, freebits; 1689 int status; 1690 struct ocfs2_dinode *bm_lock; 1691 struct buffer_head *bh = NULL; 1692 struct inode *inode = NULL; 1693 1694 trace_ocfs2_statfs(dentry->d_sb, buf); 1695 1696 osb = OCFS2_SB(dentry->d_sb); 1697 1698 inode = ocfs2_get_system_file_inode(osb, 1699 GLOBAL_BITMAP_SYSTEM_INODE, 1700 OCFS2_INVALID_SLOT); 1701 if (!inode) { 1702 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1703 status = -EIO; 1704 goto bail; 1705 } 1706 1707 status = ocfs2_inode_lock(inode, &bh, 0); 1708 if (status < 0) { 1709 mlog_errno(status); 1710 goto bail; 1711 } 1712 1713 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1714 1715 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1716 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1717 1718 buf->f_type = OCFS2_SUPER_MAGIC; 1719 buf->f_bsize = dentry->d_sb->s_blocksize; 1720 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1721 buf->f_blocks = ((sector_t) numbits) * 1722 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1723 buf->f_bfree = ((sector_t) freebits) * 1724 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1725 buf->f_bavail = buf->f_bfree; 1726 buf->f_files = numbits; 1727 buf->f_ffree = freebits; 1728 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1729 & 0xFFFFFFFFUL; 1730 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1731 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1732 1733 brelse(bh); 1734 1735 ocfs2_inode_unlock(inode, 0); 1736 status = 0; 1737 bail: 1738 if (inode) 1739 iput(inode); 1740 1741 if (status) 1742 mlog_errno(status); 1743 1744 return status; 1745 } 1746 1747 static void ocfs2_inode_init_once(void *data) 1748 { 1749 struct ocfs2_inode_info *oi = data; 1750 1751 oi->ip_flags = 0; 1752 oi->ip_open_count = 0; 1753 spin_lock_init(&oi->ip_lock); 1754 ocfs2_extent_map_init(&oi->vfs_inode); 1755 INIT_LIST_HEAD(&oi->ip_io_markers); 1756 oi->ip_dir_start_lookup = 0; 1757 mutex_init(&oi->ip_unaligned_aio); 1758 init_rwsem(&oi->ip_alloc_sem); 1759 init_rwsem(&oi->ip_xattr_sem); 1760 mutex_init(&oi->ip_io_mutex); 1761 1762 oi->ip_blkno = 0ULL; 1763 oi->ip_clusters = 0; 1764 1765 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1766 1767 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1768 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1769 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1770 1771 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1772 &ocfs2_inode_caching_ops); 1773 1774 inode_init_once(&oi->vfs_inode); 1775 } 1776 1777 static int ocfs2_initialize_mem_caches(void) 1778 { 1779 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1780 sizeof(struct ocfs2_inode_info), 1781 0, 1782 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1783 SLAB_MEM_SPREAD), 1784 ocfs2_inode_init_once); 1785 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1786 sizeof(struct ocfs2_dquot), 1787 0, 1788 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1789 SLAB_MEM_SPREAD), 1790 NULL); 1791 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1792 sizeof(struct ocfs2_quota_chunk), 1793 0, 1794 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1795 NULL); 1796 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1797 !ocfs2_qf_chunk_cachep) { 1798 if (ocfs2_inode_cachep) 1799 kmem_cache_destroy(ocfs2_inode_cachep); 1800 if (ocfs2_dquot_cachep) 1801 kmem_cache_destroy(ocfs2_dquot_cachep); 1802 if (ocfs2_qf_chunk_cachep) 1803 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1804 return -ENOMEM; 1805 } 1806 1807 return 0; 1808 } 1809 1810 static void ocfs2_free_mem_caches(void) 1811 { 1812 /* 1813 * Make sure all delayed rcu free inodes are flushed before we 1814 * destroy cache. 1815 */ 1816 rcu_barrier(); 1817 if (ocfs2_inode_cachep) 1818 kmem_cache_destroy(ocfs2_inode_cachep); 1819 ocfs2_inode_cachep = NULL; 1820 1821 if (ocfs2_dquot_cachep) 1822 kmem_cache_destroy(ocfs2_dquot_cachep); 1823 ocfs2_dquot_cachep = NULL; 1824 1825 if (ocfs2_qf_chunk_cachep) 1826 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1827 ocfs2_qf_chunk_cachep = NULL; 1828 } 1829 1830 static int ocfs2_get_sector(struct super_block *sb, 1831 struct buffer_head **bh, 1832 int block, 1833 int sect_size) 1834 { 1835 if (!sb_set_blocksize(sb, sect_size)) { 1836 mlog(ML_ERROR, "unable to set blocksize\n"); 1837 return -EIO; 1838 } 1839 1840 *bh = sb_getblk(sb, block); 1841 if (!*bh) { 1842 mlog_errno(-ENOMEM); 1843 return -ENOMEM; 1844 } 1845 lock_buffer(*bh); 1846 if (!buffer_dirty(*bh)) 1847 clear_buffer_uptodate(*bh); 1848 unlock_buffer(*bh); 1849 ll_rw_block(READ, 1, bh); 1850 wait_on_buffer(*bh); 1851 if (!buffer_uptodate(*bh)) { 1852 mlog_errno(-EIO); 1853 brelse(*bh); 1854 *bh = NULL; 1855 return -EIO; 1856 } 1857 1858 return 0; 1859 } 1860 1861 static int ocfs2_mount_volume(struct super_block *sb) 1862 { 1863 int status = 0; 1864 int unlock_super = 0; 1865 struct ocfs2_super *osb = OCFS2_SB(sb); 1866 1867 if (ocfs2_is_hard_readonly(osb)) 1868 goto leave; 1869 1870 status = ocfs2_dlm_init(osb); 1871 if (status < 0) { 1872 mlog_errno(status); 1873 goto leave; 1874 } 1875 1876 status = ocfs2_super_lock(osb, 1); 1877 if (status < 0) { 1878 mlog_errno(status); 1879 goto leave; 1880 } 1881 unlock_super = 1; 1882 1883 /* This will load up the node map and add ourselves to it. */ 1884 status = ocfs2_find_slot(osb); 1885 if (status < 0) { 1886 mlog_errno(status); 1887 goto leave; 1888 } 1889 1890 /* load all node-local system inodes */ 1891 status = ocfs2_init_local_system_inodes(osb); 1892 if (status < 0) { 1893 mlog_errno(status); 1894 goto leave; 1895 } 1896 1897 status = ocfs2_check_volume(osb); 1898 if (status < 0) { 1899 mlog_errno(status); 1900 goto leave; 1901 } 1902 1903 status = ocfs2_truncate_log_init(osb); 1904 if (status < 0) 1905 mlog_errno(status); 1906 1907 leave: 1908 if (unlock_super) 1909 ocfs2_super_unlock(osb, 1); 1910 1911 return status; 1912 } 1913 1914 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1915 { 1916 int tmp, hangup_needed = 0; 1917 struct ocfs2_super *osb = NULL; 1918 char nodestr[12]; 1919 1920 trace_ocfs2_dismount_volume(sb); 1921 1922 BUG_ON(!sb); 1923 osb = OCFS2_SB(sb); 1924 BUG_ON(!osb); 1925 1926 debugfs_remove(osb->osb_ctxt); 1927 1928 /* Orphan scan should be stopped as early as possible */ 1929 ocfs2_orphan_scan_stop(osb); 1930 1931 ocfs2_disable_quotas(osb); 1932 1933 /* All dquots should be freed by now */ 1934 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1935 /* Wait for worker to be done with the work structure in osb */ 1936 cancel_work_sync(&osb->dquot_drop_work); 1937 1938 ocfs2_shutdown_local_alloc(osb); 1939 1940 ocfs2_truncate_log_shutdown(osb); 1941 1942 /* This will disable recovery and flush any recovery work. */ 1943 ocfs2_recovery_exit(osb); 1944 1945 ocfs2_journal_shutdown(osb); 1946 1947 ocfs2_sync_blockdev(sb); 1948 1949 ocfs2_purge_refcount_trees(osb); 1950 1951 /* No cluster connection means we've failed during mount, so skip 1952 * all the steps which depended on that to complete. */ 1953 if (osb->cconn) { 1954 tmp = ocfs2_super_lock(osb, 1); 1955 if (tmp < 0) { 1956 mlog_errno(tmp); 1957 return; 1958 } 1959 } 1960 1961 if (osb->slot_num != OCFS2_INVALID_SLOT) 1962 ocfs2_put_slot(osb); 1963 1964 if (osb->cconn) 1965 ocfs2_super_unlock(osb, 1); 1966 1967 ocfs2_release_system_inodes(osb); 1968 1969 /* 1970 * If we're dismounting due to mount error, mount.ocfs2 will clean 1971 * up heartbeat. If we're a local mount, there is no heartbeat. 1972 * If we failed before we got a uuid_str yet, we can't stop 1973 * heartbeat. Otherwise, do it. 1974 */ 1975 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1976 !ocfs2_is_hard_readonly(osb)) 1977 hangup_needed = 1; 1978 1979 if (osb->cconn) 1980 ocfs2_dlm_shutdown(osb, hangup_needed); 1981 1982 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1983 debugfs_remove(osb->osb_debug_root); 1984 1985 if (hangup_needed) 1986 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1987 1988 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1989 1990 if (ocfs2_mount_local(osb)) 1991 snprintf(nodestr, sizeof(nodestr), "local"); 1992 else 1993 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1994 1995 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1996 osb->dev_str, nodestr); 1997 1998 ocfs2_delete_osb(osb); 1999 kfree(osb); 2000 sb->s_dev = 0; 2001 sb->s_fs_info = NULL; 2002 } 2003 2004 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2005 unsigned uuid_bytes) 2006 { 2007 int i, ret; 2008 char *ptr; 2009 2010 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2011 2012 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2013 if (osb->uuid_str == NULL) 2014 return -ENOMEM; 2015 2016 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2017 /* print with null */ 2018 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2019 if (ret != 2) /* drop super cleans up */ 2020 return -EINVAL; 2021 /* then only advance past the last char */ 2022 ptr += 2; 2023 } 2024 2025 return 0; 2026 } 2027 2028 /* Make sure entire volume is addressable by our journal. Requires 2029 osb_clusters_at_boot to be valid and for the journal to have been 2030 initialized by ocfs2_journal_init(). */ 2031 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2032 { 2033 int status = 0; 2034 u64 max_block = 2035 ocfs2_clusters_to_blocks(osb->sb, 2036 osb->osb_clusters_at_boot) - 1; 2037 2038 /* 32-bit block number is always OK. */ 2039 if (max_block <= (u32)~0ULL) 2040 goto out; 2041 2042 /* Volume is "huge", so see if our journal is new enough to 2043 support it. */ 2044 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2045 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2046 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2047 JBD2_FEATURE_INCOMPAT_64BIT))) { 2048 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2049 "Enable the 'block64' journal option with tunefs.ocfs2"); 2050 status = -EFBIG; 2051 goto out; 2052 } 2053 2054 out: 2055 return status; 2056 } 2057 2058 static int ocfs2_initialize_super(struct super_block *sb, 2059 struct buffer_head *bh, 2060 int sector_size, 2061 struct ocfs2_blockcheck_stats *stats) 2062 { 2063 int status; 2064 int i, cbits, bbits; 2065 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2066 struct inode *inode = NULL; 2067 struct ocfs2_journal *journal; 2068 struct ocfs2_super *osb; 2069 u64 total_blocks; 2070 2071 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2072 if (!osb) { 2073 status = -ENOMEM; 2074 mlog_errno(status); 2075 goto bail; 2076 } 2077 2078 sb->s_fs_info = osb; 2079 sb->s_op = &ocfs2_sops; 2080 sb->s_d_op = &ocfs2_dentry_ops; 2081 sb->s_export_op = &ocfs2_export_ops; 2082 sb->s_qcop = &ocfs2_quotactl_ops; 2083 sb->dq_op = &ocfs2_quota_operations; 2084 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2085 sb->s_xattr = ocfs2_xattr_handlers; 2086 sb->s_time_gran = 1; 2087 sb->s_flags |= MS_NOATIME; 2088 /* this is needed to support O_LARGEFILE */ 2089 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2090 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2091 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2092 2093 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2094 2095 for (i = 0; i < 3; i++) 2096 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2097 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2098 2099 osb->sb = sb; 2100 /* Save off for ocfs2_rw_direct */ 2101 osb->s_sectsize_bits = blksize_bits(sector_size); 2102 BUG_ON(!osb->s_sectsize_bits); 2103 2104 spin_lock_init(&osb->dc_task_lock); 2105 init_waitqueue_head(&osb->dc_event); 2106 osb->dc_work_sequence = 0; 2107 osb->dc_wake_sequence = 0; 2108 INIT_LIST_HEAD(&osb->blocked_lock_list); 2109 osb->blocked_lock_count = 0; 2110 spin_lock_init(&osb->osb_lock); 2111 spin_lock_init(&osb->osb_xattr_lock); 2112 ocfs2_init_steal_slots(osb); 2113 2114 mutex_init(&osb->system_file_mutex); 2115 2116 atomic_set(&osb->alloc_stats.moves, 0); 2117 atomic_set(&osb->alloc_stats.local_data, 0); 2118 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2119 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2120 atomic_set(&osb->alloc_stats.bg_extends, 0); 2121 2122 /* Copy the blockcheck stats from the superblock probe */ 2123 osb->osb_ecc_stats = *stats; 2124 2125 ocfs2_init_node_maps(osb); 2126 2127 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2128 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2129 2130 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2131 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2132 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2133 osb->max_slots); 2134 status = -EINVAL; 2135 goto bail; 2136 } 2137 2138 ocfs2_orphan_scan_init(osb); 2139 2140 status = ocfs2_recovery_init(osb); 2141 if (status) { 2142 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2143 mlog_errno(status); 2144 goto bail; 2145 } 2146 2147 init_waitqueue_head(&osb->checkpoint_event); 2148 2149 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2150 2151 osb->slot_num = OCFS2_INVALID_SLOT; 2152 2153 osb->s_xattr_inline_size = le16_to_cpu( 2154 di->id2.i_super.s_xattr_inline_size); 2155 2156 osb->local_alloc_state = OCFS2_LA_UNUSED; 2157 osb->local_alloc_bh = NULL; 2158 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2159 2160 init_waitqueue_head(&osb->osb_mount_event); 2161 2162 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2163 if (status) { 2164 mlog_errno(status); 2165 goto bail; 2166 } 2167 2168 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2169 if (!osb->vol_label) { 2170 mlog(ML_ERROR, "unable to alloc vol label\n"); 2171 status = -ENOMEM; 2172 goto bail; 2173 } 2174 2175 osb->slot_recovery_generations = 2176 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2177 GFP_KERNEL); 2178 if (!osb->slot_recovery_generations) { 2179 status = -ENOMEM; 2180 mlog_errno(status); 2181 goto bail; 2182 } 2183 2184 init_waitqueue_head(&osb->osb_wipe_event); 2185 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2186 sizeof(*osb->osb_orphan_wipes), 2187 GFP_KERNEL); 2188 if (!osb->osb_orphan_wipes) { 2189 status = -ENOMEM; 2190 mlog_errno(status); 2191 goto bail; 2192 } 2193 2194 osb->osb_rf_lock_tree = RB_ROOT; 2195 2196 osb->s_feature_compat = 2197 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2198 osb->s_feature_ro_compat = 2199 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2200 osb->s_feature_incompat = 2201 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2202 2203 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2204 mlog(ML_ERROR, "couldn't mount because of unsupported " 2205 "optional features (%x).\n", i); 2206 status = -EINVAL; 2207 goto bail; 2208 } 2209 if (!(osb->sb->s_flags & MS_RDONLY) && 2210 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2211 mlog(ML_ERROR, "couldn't mount RDWR because of " 2212 "unsupported optional features (%x).\n", i); 2213 status = -EINVAL; 2214 goto bail; 2215 } 2216 2217 if (ocfs2_clusterinfo_valid(osb)) { 2218 osb->osb_stackflags = 2219 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2220 strlcpy(osb->osb_cluster_stack, 2221 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2222 OCFS2_STACK_LABEL_LEN + 1); 2223 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2224 mlog(ML_ERROR, 2225 "couldn't mount because of an invalid " 2226 "cluster stack label (%s) \n", 2227 osb->osb_cluster_stack); 2228 status = -EINVAL; 2229 goto bail; 2230 } 2231 strlcpy(osb->osb_cluster_name, 2232 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2233 OCFS2_CLUSTER_NAME_LEN + 1); 2234 } else { 2235 /* The empty string is identical with classic tools that 2236 * don't know about s_cluster_info. */ 2237 osb->osb_cluster_stack[0] = '\0'; 2238 } 2239 2240 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2241 2242 /* FIXME 2243 * This should be done in ocfs2_journal_init(), but unknown 2244 * ordering issues will cause the filesystem to crash. 2245 * If anyone wants to figure out what part of the code 2246 * refers to osb->journal before ocfs2_journal_init() is run, 2247 * be my guest. 2248 */ 2249 /* initialize our journal structure */ 2250 2251 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2252 if (!journal) { 2253 mlog(ML_ERROR, "unable to alloc journal\n"); 2254 status = -ENOMEM; 2255 goto bail; 2256 } 2257 osb->journal = journal; 2258 journal->j_osb = osb; 2259 2260 atomic_set(&journal->j_num_trans, 0); 2261 init_rwsem(&journal->j_trans_barrier); 2262 init_waitqueue_head(&journal->j_checkpointed); 2263 spin_lock_init(&journal->j_lock); 2264 journal->j_trans_id = (unsigned long) 1; 2265 INIT_LIST_HEAD(&journal->j_la_cleanups); 2266 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2267 journal->j_state = OCFS2_JOURNAL_FREE; 2268 2269 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2270 init_llist_head(&osb->dquot_drop_list); 2271 2272 /* get some pseudo constants for clustersize bits */ 2273 osb->s_clustersize_bits = 2274 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2275 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2276 2277 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2278 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2279 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2280 osb->s_clustersize); 2281 status = -EINVAL; 2282 goto bail; 2283 } 2284 2285 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2286 le32_to_cpu(di->i_clusters)); 2287 2288 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2289 total_blocks); 2290 if (status) { 2291 mlog(ML_ERROR, "Volume too large " 2292 "to mount safely on this system"); 2293 status = -EFBIG; 2294 goto bail; 2295 } 2296 2297 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2298 sizeof(di->id2.i_super.s_uuid))) { 2299 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2300 status = -ENOMEM; 2301 goto bail; 2302 } 2303 2304 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2305 OCFS2_MAX_VOL_LABEL_LEN); 2306 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2307 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2308 osb->first_cluster_group_blkno = 2309 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2310 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2311 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2312 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2313 (unsigned long long)osb->root_blkno, 2314 (unsigned long long)osb->system_dir_blkno, 2315 osb->s_clustersize_bits); 2316 2317 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2318 if (!osb->osb_dlm_debug) { 2319 status = -ENOMEM; 2320 mlog_errno(status); 2321 goto bail; 2322 } 2323 2324 atomic_set(&osb->vol_state, VOLUME_INIT); 2325 2326 /* load root, system_dir, and all global system inodes */ 2327 status = ocfs2_init_global_system_inodes(osb); 2328 if (status < 0) { 2329 mlog_errno(status); 2330 goto bail; 2331 } 2332 2333 /* 2334 * global bitmap 2335 */ 2336 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2337 OCFS2_INVALID_SLOT); 2338 if (!inode) { 2339 status = -EINVAL; 2340 mlog_errno(status); 2341 goto bail; 2342 } 2343 2344 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2345 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2346 iput(inode); 2347 2348 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2349 osb->s_feature_incompat) * 8; 2350 2351 status = ocfs2_init_slot_info(osb); 2352 if (status < 0) { 2353 mlog_errno(status); 2354 goto bail; 2355 } 2356 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb); 2357 2358 bail: 2359 return status; 2360 } 2361 2362 /* 2363 * will return: -EAGAIN if it is ok to keep searching for superblocks 2364 * -EINVAL if there is a bad superblock 2365 * 0 on success 2366 */ 2367 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2368 struct buffer_head *bh, 2369 u32 blksz, 2370 struct ocfs2_blockcheck_stats *stats) 2371 { 2372 int status = -EAGAIN; 2373 2374 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2375 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2376 /* We have to do a raw check of the feature here */ 2377 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2378 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2379 status = ocfs2_block_check_validate(bh->b_data, 2380 bh->b_size, 2381 &di->i_check, 2382 stats); 2383 if (status) 2384 goto out; 2385 } 2386 status = -EINVAL; 2387 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2388 mlog(ML_ERROR, "found superblock with incorrect block " 2389 "size: found %u, should be %u\n", 2390 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2391 blksz); 2392 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2393 OCFS2_MAJOR_REV_LEVEL || 2394 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2395 OCFS2_MINOR_REV_LEVEL) { 2396 mlog(ML_ERROR, "found superblock with bad version: " 2397 "found %u.%u, should be %u.%u\n", 2398 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2399 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2400 OCFS2_MAJOR_REV_LEVEL, 2401 OCFS2_MINOR_REV_LEVEL); 2402 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2403 mlog(ML_ERROR, "bad block number on superblock: " 2404 "found %llu, should be %llu\n", 2405 (unsigned long long)le64_to_cpu(di->i_blkno), 2406 (unsigned long long)bh->b_blocknr); 2407 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2408 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2409 mlog(ML_ERROR, "bad cluster size found: %u\n", 2410 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2411 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2412 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2413 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2414 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2415 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2416 mlog(ML_ERROR, 2417 "Superblock slots found greater than file system " 2418 "maximum: found %u, max %u\n", 2419 le16_to_cpu(di->id2.i_super.s_max_slots), 2420 OCFS2_MAX_SLOTS); 2421 } else { 2422 /* found it! */ 2423 status = 0; 2424 } 2425 } 2426 2427 out: 2428 if (status && status != -EAGAIN) 2429 mlog_errno(status); 2430 return status; 2431 } 2432 2433 static int ocfs2_check_volume(struct ocfs2_super *osb) 2434 { 2435 int status; 2436 int dirty; 2437 int local; 2438 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2439 * recover 2440 * ourselves. */ 2441 2442 /* Init our journal object. */ 2443 status = ocfs2_journal_init(osb->journal, &dirty); 2444 if (status < 0) { 2445 mlog(ML_ERROR, "Could not initialize journal!\n"); 2446 goto finally; 2447 } 2448 2449 /* Now that journal has been initialized, check to make sure 2450 entire volume is addressable. */ 2451 status = ocfs2_journal_addressable(osb); 2452 if (status) 2453 goto finally; 2454 2455 /* If the journal was unmounted cleanly then we don't want to 2456 * recover anything. Otherwise, journal_load will do that 2457 * dirty work for us :) */ 2458 if (!dirty) { 2459 status = ocfs2_journal_wipe(osb->journal, 0); 2460 if (status < 0) { 2461 mlog_errno(status); 2462 goto finally; 2463 } 2464 } else { 2465 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2466 "unmounted cleanly, recovering it.\n", osb->dev_str); 2467 } 2468 2469 local = ocfs2_mount_local(osb); 2470 2471 /* will play back anything left in the journal. */ 2472 status = ocfs2_journal_load(osb->journal, local, dirty); 2473 if (status < 0) { 2474 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2475 goto finally; 2476 } 2477 2478 if (dirty) { 2479 /* recover my local alloc if we didn't unmount cleanly. */ 2480 status = ocfs2_begin_local_alloc_recovery(osb, 2481 osb->slot_num, 2482 &local_alloc); 2483 if (status < 0) { 2484 mlog_errno(status); 2485 goto finally; 2486 } 2487 /* we complete the recovery process after we've marked 2488 * ourselves as mounted. */ 2489 } 2490 2491 status = ocfs2_load_local_alloc(osb); 2492 if (status < 0) { 2493 mlog_errno(status); 2494 goto finally; 2495 } 2496 2497 if (dirty) { 2498 /* Recovery will be completed after we've mounted the 2499 * rest of the volume. */ 2500 osb->dirty = 1; 2501 osb->local_alloc_copy = local_alloc; 2502 local_alloc = NULL; 2503 } 2504 2505 /* go through each journal, trylock it and if you get the 2506 * lock, and it's marked as dirty, set the bit in the recover 2507 * map and launch a recovery thread for it. */ 2508 status = ocfs2_mark_dead_nodes(osb); 2509 if (status < 0) { 2510 mlog_errno(status); 2511 goto finally; 2512 } 2513 2514 status = ocfs2_compute_replay_slots(osb); 2515 if (status < 0) 2516 mlog_errno(status); 2517 2518 finally: 2519 kfree(local_alloc); 2520 2521 if (status) 2522 mlog_errno(status); 2523 return status; 2524 } 2525 2526 /* 2527 * The routine gets called from dismount or close whenever a dismount on 2528 * volume is requested and the osb open count becomes 1. 2529 * It will remove the osb from the global list and also free up all the 2530 * initialized resources and fileobject. 2531 */ 2532 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2533 { 2534 /* This function assumes that the caller has the main osb resource */ 2535 2536 ocfs2_free_slot_info(osb); 2537 2538 kfree(osb->osb_orphan_wipes); 2539 kfree(osb->slot_recovery_generations); 2540 /* FIXME 2541 * This belongs in journal shutdown, but because we have to 2542 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2543 * we free it here. 2544 */ 2545 kfree(osb->journal); 2546 kfree(osb->local_alloc_copy); 2547 kfree(osb->uuid_str); 2548 kfree(osb->vol_label); 2549 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2550 memset(osb, 0, sizeof(struct ocfs2_super)); 2551 } 2552 2553 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2554 * panic(). We do not support continue-on-error operation. */ 2555 static void ocfs2_handle_error(struct super_block *sb) 2556 { 2557 struct ocfs2_super *osb = OCFS2_SB(sb); 2558 2559 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2560 panic("OCFS2: (device %s): panic forced after error\n", 2561 sb->s_id); 2562 2563 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2564 2565 if (sb->s_flags & MS_RDONLY && 2566 (ocfs2_is_soft_readonly(osb) || 2567 ocfs2_is_hard_readonly(osb))) 2568 return; 2569 2570 printk(KERN_CRIT "File system is now read-only due to the potential " 2571 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2572 "system is unmounted.\n"); 2573 sb->s_flags |= MS_RDONLY; 2574 ocfs2_set_ro_flag(osb, 0); 2575 } 2576 2577 static char error_buf[1024]; 2578 2579 void __ocfs2_error(struct super_block *sb, 2580 const char *function, 2581 const char *fmt, ...) 2582 { 2583 va_list args; 2584 2585 va_start(args, fmt); 2586 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2587 va_end(args); 2588 2589 /* Not using mlog here because we want to show the actual 2590 * function the error came from. */ 2591 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2592 sb->s_id, function, error_buf); 2593 2594 ocfs2_handle_error(sb); 2595 } 2596 2597 /* Handle critical errors. This is intentionally more drastic than 2598 * ocfs2_handle_error, so we only use for things like journal errors, 2599 * etc. */ 2600 void __ocfs2_abort(struct super_block* sb, 2601 const char *function, 2602 const char *fmt, ...) 2603 { 2604 va_list args; 2605 2606 va_start(args, fmt); 2607 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2608 va_end(args); 2609 2610 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2611 sb->s_id, function, error_buf); 2612 2613 /* We don't have the cluster support yet to go straight to 2614 * hard readonly in here. Until then, we want to keep 2615 * ocfs2_abort() so that we can at least mark critical 2616 * errors. 2617 * 2618 * TODO: This should abort the journal and alert other nodes 2619 * that our slot needs recovery. */ 2620 2621 /* Force a panic(). This stinks, but it's better than letting 2622 * things continue without having a proper hard readonly 2623 * here. */ 2624 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2625 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2626 ocfs2_handle_error(sb); 2627 } 2628 2629 /* 2630 * Void signal blockers, because in-kernel sigprocmask() only fails 2631 * when SIG_* is wrong. 2632 */ 2633 void ocfs2_block_signals(sigset_t *oldset) 2634 { 2635 int rc; 2636 sigset_t blocked; 2637 2638 sigfillset(&blocked); 2639 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2640 BUG_ON(rc); 2641 } 2642 2643 void ocfs2_unblock_signals(sigset_t *oldset) 2644 { 2645 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2646 BUG_ON(rc); 2647 } 2648 2649 module_init(ocfs2_init); 2650 module_exit(ocfs2_exit); 2651