1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/init.h> 32 #include <linux/random.h> 33 #include <linux/statfs.h> 34 #include <linux/moduleparam.h> 35 #include <linux/blkdev.h> 36 #include <linux/socket.h> 37 #include <linux/inet.h> 38 #include <linux/parser.h> 39 #include <linux/crc32.h> 40 #include <linux/debugfs.h> 41 #include <linux/mount.h> 42 #include <linux/seq_file.h> 43 #include <linux/quotaops.h> 44 #include <linux/cleancache.h> 45 46 #define CREATE_TRACE_POINTS 47 #include "ocfs2_trace.h" 48 49 #include <cluster/masklog.h> 50 51 #include "ocfs2.h" 52 53 /* this should be the only file to include a version 1 header */ 54 #include "ocfs1_fs_compat.h" 55 56 #include "alloc.h" 57 #include "aops.h" 58 #include "blockcheck.h" 59 #include "dlmglue.h" 60 #include "export.h" 61 #include "extent_map.h" 62 #include "heartbeat.h" 63 #include "inode.h" 64 #include "journal.h" 65 #include "localalloc.h" 66 #include "namei.h" 67 #include "slot_map.h" 68 #include "super.h" 69 #include "sysfile.h" 70 #include "uptodate.h" 71 #include "xattr.h" 72 #include "quota.h" 73 #include "refcounttree.h" 74 #include "suballoc.h" 75 76 #include "buffer_head_io.h" 77 78 static struct kmem_cache *ocfs2_inode_cachep; 79 struct kmem_cache *ocfs2_dquot_cachep; 80 struct kmem_cache *ocfs2_qf_chunk_cachep; 81 82 /* OCFS2 needs to schedule several different types of work which 83 * require cluster locking, disk I/O, recovery waits, etc. Since these 84 * types of work tend to be heavy we avoid using the kernel events 85 * workqueue and schedule on our own. */ 86 struct workqueue_struct *ocfs2_wq = NULL; 87 88 static struct dentry *ocfs2_debugfs_root; 89 90 MODULE_AUTHOR("Oracle"); 91 MODULE_LICENSE("GPL"); 92 MODULE_DESCRIPTION("OCFS2 cluster file system"); 93 94 struct mount_options 95 { 96 unsigned long commit_interval; 97 unsigned long mount_opt; 98 unsigned int atime_quantum; 99 signed short slot; 100 int localalloc_opt; 101 unsigned int resv_level; 102 int dir_resv_level; 103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 104 }; 105 106 static int ocfs2_parse_options(struct super_block *sb, char *options, 107 struct mount_options *mopt, 108 int is_remount); 109 static int ocfs2_check_set_options(struct super_block *sb, 110 struct mount_options *options); 111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 112 static void ocfs2_put_super(struct super_block *sb); 113 static int ocfs2_mount_volume(struct super_block *sb); 114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 116 static int ocfs2_initialize_mem_caches(void); 117 static void ocfs2_free_mem_caches(void); 118 static void ocfs2_delete_osb(struct ocfs2_super *osb); 119 120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 121 122 static int ocfs2_sync_fs(struct super_block *sb, int wait); 123 124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 127 static int ocfs2_check_volume(struct ocfs2_super *osb); 128 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 129 struct buffer_head *bh, 130 u32 sectsize, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_initialize_super(struct super_block *sb, 133 struct buffer_head *bh, 134 int sector_size, 135 struct ocfs2_blockcheck_stats *stats); 136 static int ocfs2_get_sector(struct super_block *sb, 137 struct buffer_head **bh, 138 int block, 139 int sect_size); 140 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 141 static void ocfs2_destroy_inode(struct inode *inode); 142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 143 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 144 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 145 146 static struct dquot **ocfs2_get_dquots(struct inode *inode) 147 { 148 return OCFS2_I(inode)->i_dquot; 149 } 150 151 static const struct super_operations ocfs2_sops = { 152 .statfs = ocfs2_statfs, 153 .alloc_inode = ocfs2_alloc_inode, 154 .destroy_inode = ocfs2_destroy_inode, 155 .drop_inode = ocfs2_drop_inode, 156 .evict_inode = ocfs2_evict_inode, 157 .sync_fs = ocfs2_sync_fs, 158 .put_super = ocfs2_put_super, 159 .remount_fs = ocfs2_remount, 160 .show_options = ocfs2_show_options, 161 .quota_read = ocfs2_quota_read, 162 .quota_write = ocfs2_quota_write, 163 .get_dquots = ocfs2_get_dquots, 164 }; 165 166 enum { 167 Opt_barrier, 168 Opt_err_panic, 169 Opt_err_ro, 170 Opt_intr, 171 Opt_nointr, 172 Opt_hb_none, 173 Opt_hb_local, 174 Opt_hb_global, 175 Opt_data_ordered, 176 Opt_data_writeback, 177 Opt_atime_quantum, 178 Opt_slot, 179 Opt_commit, 180 Opt_localalloc, 181 Opt_localflocks, 182 Opt_stack, 183 Opt_user_xattr, 184 Opt_nouser_xattr, 185 Opt_inode64, 186 Opt_acl, 187 Opt_noacl, 188 Opt_usrquota, 189 Opt_grpquota, 190 Opt_coherency_buffered, 191 Opt_coherency_full, 192 Opt_resv_level, 193 Opt_dir_resv_level, 194 Opt_journal_async_commit, 195 Opt_err_cont, 196 Opt_err, 197 }; 198 199 static const match_table_t tokens = { 200 {Opt_barrier, "barrier=%u"}, 201 {Opt_err_panic, "errors=panic"}, 202 {Opt_err_ro, "errors=remount-ro"}, 203 {Opt_intr, "intr"}, 204 {Opt_nointr, "nointr"}, 205 {Opt_hb_none, OCFS2_HB_NONE}, 206 {Opt_hb_local, OCFS2_HB_LOCAL}, 207 {Opt_hb_global, OCFS2_HB_GLOBAL}, 208 {Opt_data_ordered, "data=ordered"}, 209 {Opt_data_writeback, "data=writeback"}, 210 {Opt_atime_quantum, "atime_quantum=%u"}, 211 {Opt_slot, "preferred_slot=%u"}, 212 {Opt_commit, "commit=%u"}, 213 {Opt_localalloc, "localalloc=%d"}, 214 {Opt_localflocks, "localflocks"}, 215 {Opt_stack, "cluster_stack=%s"}, 216 {Opt_user_xattr, "user_xattr"}, 217 {Opt_nouser_xattr, "nouser_xattr"}, 218 {Opt_inode64, "inode64"}, 219 {Opt_acl, "acl"}, 220 {Opt_noacl, "noacl"}, 221 {Opt_usrquota, "usrquota"}, 222 {Opt_grpquota, "grpquota"}, 223 {Opt_coherency_buffered, "coherency=buffered"}, 224 {Opt_coherency_full, "coherency=full"}, 225 {Opt_resv_level, "resv_level=%u"}, 226 {Opt_dir_resv_level, "dir_resv_level=%u"}, 227 {Opt_journal_async_commit, "journal_async_commit"}, 228 {Opt_err_cont, "errors=continue"}, 229 {Opt_err, NULL} 230 }; 231 232 #ifdef CONFIG_DEBUG_FS 233 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 234 { 235 struct ocfs2_cluster_connection *cconn = osb->cconn; 236 struct ocfs2_recovery_map *rm = osb->recovery_map; 237 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 238 int i, out = 0; 239 240 out += snprintf(buf + out, len - out, 241 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 242 "Device", osb->dev_str, osb->uuid_str, 243 osb->fs_generation, osb->vol_label); 244 245 out += snprintf(buf + out, len - out, 246 "%10s => State: %d Flags: 0x%lX\n", "Volume", 247 atomic_read(&osb->vol_state), osb->osb_flags); 248 249 out += snprintf(buf + out, len - out, 250 "%10s => Block: %lu Cluster: %d\n", "Sizes", 251 osb->sb->s_blocksize, osb->s_clustersize); 252 253 out += snprintf(buf + out, len - out, 254 "%10s => Compat: 0x%X Incompat: 0x%X " 255 "ROcompat: 0x%X\n", 256 "Features", osb->s_feature_compat, 257 osb->s_feature_incompat, osb->s_feature_ro_compat); 258 259 out += snprintf(buf + out, len - out, 260 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 261 osb->s_mount_opt, osb->s_atime_quantum); 262 263 if (cconn) { 264 out += snprintf(buf + out, len - out, 265 "%10s => Stack: %s Name: %*s " 266 "Version: %d.%d\n", "Cluster", 267 (*osb->osb_cluster_stack == '\0' ? 268 "o2cb" : osb->osb_cluster_stack), 269 cconn->cc_namelen, cconn->cc_name, 270 cconn->cc_version.pv_major, 271 cconn->cc_version.pv_minor); 272 } 273 274 spin_lock(&osb->dc_task_lock); 275 out += snprintf(buf + out, len - out, 276 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 277 "WorkSeq: %lu\n", "DownCnvt", 278 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 279 osb->blocked_lock_count, osb->dc_wake_sequence, 280 osb->dc_work_sequence); 281 spin_unlock(&osb->dc_task_lock); 282 283 spin_lock(&osb->osb_lock); 284 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 285 "Recovery", 286 (osb->recovery_thread_task ? 287 task_pid_nr(osb->recovery_thread_task) : -1)); 288 if (rm->rm_used == 0) 289 out += snprintf(buf + out, len - out, " None\n"); 290 else { 291 for (i = 0; i < rm->rm_used; i++) 292 out += snprintf(buf + out, len - out, " %d", 293 rm->rm_entries[i]); 294 out += snprintf(buf + out, len - out, "\n"); 295 } 296 spin_unlock(&osb->osb_lock); 297 298 out += snprintf(buf + out, len - out, 299 "%10s => Pid: %d Interval: %lu\n", "Commit", 300 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 301 osb->osb_commit_interval); 302 303 out += snprintf(buf + out, len - out, 304 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 305 "Journal", osb->journal->j_state, 306 osb->journal->j_trans_id, 307 atomic_read(&osb->journal->j_num_trans)); 308 309 out += snprintf(buf + out, len - out, 310 "%10s => GlobalAllocs: %d LocalAllocs: %d " 311 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 312 "Stats", 313 atomic_read(&osb->alloc_stats.bitmap_data), 314 atomic_read(&osb->alloc_stats.local_data), 315 atomic_read(&osb->alloc_stats.bg_allocs), 316 atomic_read(&osb->alloc_stats.moves), 317 atomic_read(&osb->alloc_stats.bg_extends)); 318 319 out += snprintf(buf + out, len - out, 320 "%10s => State: %u Descriptor: %llu Size: %u bits " 321 "Default: %u bits\n", 322 "LocalAlloc", osb->local_alloc_state, 323 (unsigned long long)osb->la_last_gd, 324 osb->local_alloc_bits, osb->local_alloc_default_bits); 325 326 spin_lock(&osb->osb_lock); 327 out += snprintf(buf + out, len - out, 328 "%10s => InodeSlot: %d StolenInodes: %d, " 329 "MetaSlot: %d StolenMeta: %d\n", "Steal", 330 osb->s_inode_steal_slot, 331 atomic_read(&osb->s_num_inodes_stolen), 332 osb->s_meta_steal_slot, 333 atomic_read(&osb->s_num_meta_stolen)); 334 spin_unlock(&osb->osb_lock); 335 336 out += snprintf(buf + out, len - out, "OrphanScan => "); 337 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 338 os->os_count, os->os_seqno); 339 out += snprintf(buf + out, len - out, " Last Scan: "); 340 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 341 out += snprintf(buf + out, len - out, "Disabled\n"); 342 else 343 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 344 (get_seconds() - os->os_scantime.tv_sec)); 345 346 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 347 "Slots", "Num", "RecoGen"); 348 for (i = 0; i < osb->max_slots; ++i) { 349 out += snprintf(buf + out, len - out, 350 "%10s %c %3d %10d\n", 351 " ", 352 (i == osb->slot_num ? '*' : ' '), 353 i, osb->slot_recovery_generations[i]); 354 } 355 356 return out; 357 } 358 359 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 360 { 361 struct ocfs2_super *osb = inode->i_private; 362 char *buf = NULL; 363 364 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 365 if (!buf) 366 goto bail; 367 368 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 369 370 file->private_data = buf; 371 372 return 0; 373 bail: 374 return -ENOMEM; 375 } 376 377 static int ocfs2_debug_release(struct inode *inode, struct file *file) 378 { 379 kfree(file->private_data); 380 return 0; 381 } 382 383 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 384 size_t nbytes, loff_t *ppos) 385 { 386 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 387 i_size_read(file->f_mapping->host)); 388 } 389 #else 390 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 391 { 392 return 0; 393 } 394 static int ocfs2_debug_release(struct inode *inode, struct file *file) 395 { 396 return 0; 397 } 398 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 399 size_t nbytes, loff_t *ppos) 400 { 401 return 0; 402 } 403 #endif /* CONFIG_DEBUG_FS */ 404 405 static const struct file_operations ocfs2_osb_debug_fops = { 406 .open = ocfs2_osb_debug_open, 407 .release = ocfs2_debug_release, 408 .read = ocfs2_debug_read, 409 .llseek = generic_file_llseek, 410 }; 411 412 static int ocfs2_sync_fs(struct super_block *sb, int wait) 413 { 414 int status; 415 tid_t target; 416 struct ocfs2_super *osb = OCFS2_SB(sb); 417 418 if (ocfs2_is_hard_readonly(osb)) 419 return -EROFS; 420 421 if (wait) { 422 status = ocfs2_flush_truncate_log(osb); 423 if (status < 0) 424 mlog_errno(status); 425 } else { 426 ocfs2_schedule_truncate_log_flush(osb, 0); 427 } 428 429 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 430 &target)) { 431 if (wait) 432 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 433 target); 434 } 435 return 0; 436 } 437 438 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 439 { 440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 441 && (ino == USER_QUOTA_SYSTEM_INODE 442 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 443 return 0; 444 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 445 && (ino == GROUP_QUOTA_SYSTEM_INODE 446 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 447 return 0; 448 return 1; 449 } 450 451 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 452 { 453 struct inode *new = NULL; 454 int status = 0; 455 int i; 456 457 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 458 if (IS_ERR(new)) { 459 status = PTR_ERR(new); 460 mlog_errno(status); 461 goto bail; 462 } 463 osb->root_inode = new; 464 465 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 466 if (IS_ERR(new)) { 467 status = PTR_ERR(new); 468 mlog_errno(status); 469 goto bail; 470 } 471 osb->sys_root_inode = new; 472 473 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 474 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 475 if (!ocfs2_need_system_inode(osb, i)) 476 continue; 477 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 478 if (!new) { 479 ocfs2_release_system_inodes(osb); 480 status = -EINVAL; 481 mlog_errno(status); 482 /* FIXME: Should ERROR_RO_FS */ 483 mlog(ML_ERROR, "Unable to load system inode %d, " 484 "possibly corrupt fs?", i); 485 goto bail; 486 } 487 // the array now has one ref, so drop this one 488 iput(new); 489 } 490 491 bail: 492 if (status) 493 mlog_errno(status); 494 return status; 495 } 496 497 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 498 { 499 struct inode *new = NULL; 500 int status = 0; 501 int i; 502 503 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 504 i < NUM_SYSTEM_INODES; 505 i++) { 506 if (!ocfs2_need_system_inode(osb, i)) 507 continue; 508 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 509 if (!new) { 510 ocfs2_release_system_inodes(osb); 511 status = -EINVAL; 512 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 513 status, i, osb->slot_num); 514 goto bail; 515 } 516 /* the array now has one ref, so drop this one */ 517 iput(new); 518 } 519 520 bail: 521 if (status) 522 mlog_errno(status); 523 return status; 524 } 525 526 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 527 { 528 int i; 529 struct inode *inode; 530 531 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 532 inode = osb->global_system_inodes[i]; 533 if (inode) { 534 iput(inode); 535 osb->global_system_inodes[i] = NULL; 536 } 537 } 538 539 inode = osb->sys_root_inode; 540 if (inode) { 541 iput(inode); 542 osb->sys_root_inode = NULL; 543 } 544 545 inode = osb->root_inode; 546 if (inode) { 547 iput(inode); 548 osb->root_inode = NULL; 549 } 550 551 if (!osb->local_system_inodes) 552 return; 553 554 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 555 if (osb->local_system_inodes[i]) { 556 iput(osb->local_system_inodes[i]); 557 osb->local_system_inodes[i] = NULL; 558 } 559 } 560 561 kfree(osb->local_system_inodes); 562 osb->local_system_inodes = NULL; 563 } 564 565 /* We're allocating fs objects, use GFP_NOFS */ 566 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 567 { 568 struct ocfs2_inode_info *oi; 569 570 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 571 if (!oi) 572 return NULL; 573 574 oi->i_sync_tid = 0; 575 oi->i_datasync_tid = 0; 576 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 577 578 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 579 return &oi->vfs_inode; 580 } 581 582 static void ocfs2_i_callback(struct rcu_head *head) 583 { 584 struct inode *inode = container_of(head, struct inode, i_rcu); 585 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 586 } 587 588 static void ocfs2_destroy_inode(struct inode *inode) 589 { 590 call_rcu(&inode->i_rcu, ocfs2_i_callback); 591 } 592 593 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 594 unsigned int cbits) 595 { 596 unsigned int bytes = 1 << cbits; 597 unsigned int trim = bytes; 598 unsigned int bitshift = 32; 599 600 /* 601 * i_size and all block offsets in ocfs2 are always 64 bits 602 * wide. i_clusters is 32 bits, in cluster-sized units. So on 603 * 64 bit platforms, cluster size will be the limiting factor. 604 */ 605 606 #if BITS_PER_LONG == 32 607 # if defined(CONFIG_LBDAF) 608 BUILD_BUG_ON(sizeof(sector_t) != 8); 609 /* 610 * We might be limited by page cache size. 611 */ 612 if (bytes > PAGE_CACHE_SIZE) { 613 bytes = PAGE_CACHE_SIZE; 614 trim = 1; 615 /* 616 * Shift by 31 here so that we don't get larger than 617 * MAX_LFS_FILESIZE 618 */ 619 bitshift = 31; 620 } 621 # else 622 /* 623 * We are limited by the size of sector_t. Use block size, as 624 * that's what we expose to the VFS. 625 */ 626 bytes = 1 << bbits; 627 trim = 1; 628 bitshift = 31; 629 # endif 630 #endif 631 632 /* 633 * Trim by a whole cluster when we can actually approach the 634 * on-disk limits. Otherwise we can overflow i_clusters when 635 * an extent start is at the max offset. 636 */ 637 return (((unsigned long long)bytes) << bitshift) - trim; 638 } 639 640 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 641 { 642 int incompat_features; 643 int ret = 0; 644 struct mount_options parsed_options; 645 struct ocfs2_super *osb = OCFS2_SB(sb); 646 u32 tmp; 647 648 sync_filesystem(sb); 649 650 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 651 !ocfs2_check_set_options(sb, &parsed_options)) { 652 ret = -EINVAL; 653 goto out; 654 } 655 656 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 657 OCFS2_MOUNT_HB_NONE; 658 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 659 ret = -EINVAL; 660 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 661 goto out; 662 } 663 664 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 665 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 666 ret = -EINVAL; 667 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 668 goto out; 669 } 670 671 /* Probably don't want this on remount; it might 672 * mess with other nodes */ 673 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 674 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 675 ret = -EINVAL; 676 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 677 goto out; 678 } 679 680 /* We're going to/from readonly mode. */ 681 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 682 /* Disable quota accounting before remounting RO */ 683 if (*flags & MS_RDONLY) { 684 ret = ocfs2_susp_quotas(osb, 0); 685 if (ret < 0) 686 goto out; 687 } 688 /* Lock here so the check of HARD_RO and the potential 689 * setting of SOFT_RO is atomic. */ 690 spin_lock(&osb->osb_lock); 691 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 692 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 693 ret = -EROFS; 694 goto unlock_osb; 695 } 696 697 if (*flags & MS_RDONLY) { 698 sb->s_flags |= MS_RDONLY; 699 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 700 } else { 701 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 702 mlog(ML_ERROR, "Cannot remount RDWR " 703 "filesystem due to previous errors.\n"); 704 ret = -EROFS; 705 goto unlock_osb; 706 } 707 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 708 if (incompat_features) { 709 mlog(ML_ERROR, "Cannot remount RDWR because " 710 "of unsupported optional features " 711 "(%x).\n", incompat_features); 712 ret = -EINVAL; 713 goto unlock_osb; 714 } 715 sb->s_flags &= ~MS_RDONLY; 716 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 717 } 718 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 719 unlock_osb: 720 spin_unlock(&osb->osb_lock); 721 /* Enable quota accounting after remounting RW */ 722 if (!ret && !(*flags & MS_RDONLY)) { 723 if (sb_any_quota_suspended(sb)) 724 ret = ocfs2_susp_quotas(osb, 1); 725 else 726 ret = ocfs2_enable_quotas(osb); 727 if (ret < 0) { 728 /* Return back changes... */ 729 spin_lock(&osb->osb_lock); 730 sb->s_flags |= MS_RDONLY; 731 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 732 spin_unlock(&osb->osb_lock); 733 goto out; 734 } 735 } 736 } 737 738 if (!ret) { 739 /* Only save off the new mount options in case of a successful 740 * remount. */ 741 osb->s_mount_opt = parsed_options.mount_opt; 742 osb->s_atime_quantum = parsed_options.atime_quantum; 743 osb->preferred_slot = parsed_options.slot; 744 if (parsed_options.commit_interval) 745 osb->osb_commit_interval = parsed_options.commit_interval; 746 747 if (!ocfs2_is_hard_readonly(osb)) 748 ocfs2_set_journal_params(osb); 749 750 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 751 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 752 MS_POSIXACL : 0); 753 } 754 out: 755 return ret; 756 } 757 758 static int ocfs2_sb_probe(struct super_block *sb, 759 struct buffer_head **bh, 760 int *sector_size, 761 struct ocfs2_blockcheck_stats *stats) 762 { 763 int status, tmpstat; 764 struct ocfs1_vol_disk_hdr *hdr; 765 struct ocfs2_dinode *di; 766 int blksize; 767 768 *bh = NULL; 769 770 /* may be > 512 */ 771 *sector_size = bdev_logical_block_size(sb->s_bdev); 772 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 773 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 774 *sector_size, OCFS2_MAX_BLOCKSIZE); 775 status = -EINVAL; 776 goto bail; 777 } 778 779 /* Can this really happen? */ 780 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 781 *sector_size = OCFS2_MIN_BLOCKSIZE; 782 783 /* check block zero for old format */ 784 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 785 if (status < 0) { 786 mlog_errno(status); 787 goto bail; 788 } 789 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 790 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 791 mlog(ML_ERROR, "incompatible version: %u.%u\n", 792 hdr->major_version, hdr->minor_version); 793 status = -EINVAL; 794 } 795 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 796 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 797 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 798 hdr->signature); 799 status = -EINVAL; 800 } 801 brelse(*bh); 802 *bh = NULL; 803 if (status < 0) { 804 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 805 "upgraded before mounting with ocfs v2\n"); 806 goto bail; 807 } 808 809 /* 810 * Now check at magic offset for 512, 1024, 2048, 4096 811 * blocksizes. 4096 is the maximum blocksize because it is 812 * the minimum clustersize. 813 */ 814 status = -EINVAL; 815 for (blksize = *sector_size; 816 blksize <= OCFS2_MAX_BLOCKSIZE; 817 blksize <<= 1) { 818 tmpstat = ocfs2_get_sector(sb, bh, 819 OCFS2_SUPER_BLOCK_BLKNO, 820 blksize); 821 if (tmpstat < 0) { 822 status = tmpstat; 823 mlog_errno(status); 824 break; 825 } 826 di = (struct ocfs2_dinode *) (*bh)->b_data; 827 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 828 spin_lock_init(&stats->b_lock); 829 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 830 if (tmpstat < 0) { 831 brelse(*bh); 832 *bh = NULL; 833 } 834 if (tmpstat != -EAGAIN) { 835 status = tmpstat; 836 break; 837 } 838 } 839 840 bail: 841 return status; 842 } 843 844 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 845 { 846 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 847 848 if (osb->s_mount_opt & hb_enabled) { 849 if (ocfs2_mount_local(osb)) { 850 mlog(ML_ERROR, "Cannot heartbeat on a locally " 851 "mounted device.\n"); 852 return -EINVAL; 853 } 854 if (ocfs2_userspace_stack(osb)) { 855 mlog(ML_ERROR, "Userspace stack expected, but " 856 "o2cb heartbeat arguments passed to mount\n"); 857 return -EINVAL; 858 } 859 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 860 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 861 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 862 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 863 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 864 return -EINVAL; 865 } 866 } 867 868 if (!(osb->s_mount_opt & hb_enabled)) { 869 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 870 !ocfs2_userspace_stack(osb)) { 871 mlog(ML_ERROR, "Heartbeat has to be started to mount " 872 "a read-write clustered device.\n"); 873 return -EINVAL; 874 } 875 } 876 877 return 0; 878 } 879 880 /* 881 * If we're using a userspace stack, mount should have passed 882 * a name that matches the disk. If not, mount should not 883 * have passed a stack. 884 */ 885 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 886 struct mount_options *mopt) 887 { 888 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 889 mlog(ML_ERROR, 890 "cluster stack passed to mount, but this filesystem " 891 "does not support it\n"); 892 return -EINVAL; 893 } 894 895 if (ocfs2_userspace_stack(osb) && 896 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 897 OCFS2_STACK_LABEL_LEN)) { 898 mlog(ML_ERROR, 899 "cluster stack passed to mount (\"%s\") does not " 900 "match the filesystem (\"%s\")\n", 901 mopt->cluster_stack, 902 osb->osb_cluster_stack); 903 return -EINVAL; 904 } 905 906 return 0; 907 } 908 909 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 910 { 911 int type; 912 struct super_block *sb = osb->sb; 913 unsigned int feature[OCFS2_MAXQUOTAS] = { 914 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 915 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 916 int status = 0; 917 918 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 919 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 920 continue; 921 if (unsuspend) 922 status = dquot_resume(sb, type); 923 else { 924 struct ocfs2_mem_dqinfo *oinfo; 925 926 /* Cancel periodic syncing before suspending */ 927 oinfo = sb_dqinfo(sb, type)->dqi_priv; 928 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 929 status = dquot_suspend(sb, type); 930 } 931 if (status < 0) 932 break; 933 } 934 if (status < 0) 935 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 936 "remount (error = %d).\n", status); 937 return status; 938 } 939 940 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 941 { 942 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 943 struct super_block *sb = osb->sb; 944 unsigned int feature[OCFS2_MAXQUOTAS] = { 945 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 946 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 947 unsigned int ino[OCFS2_MAXQUOTAS] = { 948 LOCAL_USER_QUOTA_SYSTEM_INODE, 949 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 950 int status; 951 int type; 952 953 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 954 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 955 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 956 continue; 957 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 958 osb->slot_num); 959 if (!inode[type]) { 960 status = -ENOENT; 961 goto out_quota_off; 962 } 963 status = dquot_enable(inode[type], type, QFMT_OCFS2, 964 DQUOT_USAGE_ENABLED); 965 if (status < 0) 966 goto out_quota_off; 967 } 968 969 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 970 iput(inode[type]); 971 return 0; 972 out_quota_off: 973 ocfs2_disable_quotas(osb); 974 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 975 iput(inode[type]); 976 mlog_errno(status); 977 return status; 978 } 979 980 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 981 { 982 int type; 983 struct inode *inode; 984 struct super_block *sb = osb->sb; 985 struct ocfs2_mem_dqinfo *oinfo; 986 987 /* We mostly ignore errors in this function because there's not much 988 * we can do when we see them */ 989 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 990 if (!sb_has_quota_loaded(sb, type)) 991 continue; 992 /* Cancel periodic syncing before we grab dqonoff_mutex */ 993 oinfo = sb_dqinfo(sb, type)->dqi_priv; 994 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 995 inode = igrab(sb->s_dquot.files[type]); 996 /* Turn off quotas. This will remove all dquot structures from 997 * memory and so they will be automatically synced to global 998 * quota files */ 999 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 1000 DQUOT_LIMITS_ENABLED); 1001 if (!inode) 1002 continue; 1003 iput(inode); 1004 } 1005 } 1006 1007 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1008 { 1009 struct dentry *root; 1010 int status, sector_size; 1011 struct mount_options parsed_options; 1012 struct inode *inode = NULL; 1013 struct ocfs2_super *osb = NULL; 1014 struct buffer_head *bh = NULL; 1015 char nodestr[12]; 1016 struct ocfs2_blockcheck_stats stats; 1017 1018 trace_ocfs2_fill_super(sb, data, silent); 1019 1020 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1021 status = -EINVAL; 1022 goto read_super_error; 1023 } 1024 1025 /* probe for superblock */ 1026 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1027 if (status < 0) { 1028 mlog(ML_ERROR, "superblock probe failed!\n"); 1029 goto read_super_error; 1030 } 1031 1032 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1033 osb = OCFS2_SB(sb); 1034 if (status < 0) { 1035 mlog_errno(status); 1036 goto read_super_error; 1037 } 1038 brelse(bh); 1039 bh = NULL; 1040 1041 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1042 status = -EINVAL; 1043 goto read_super_error; 1044 } 1045 osb->s_mount_opt = parsed_options.mount_opt; 1046 osb->s_atime_quantum = parsed_options.atime_quantum; 1047 osb->preferred_slot = parsed_options.slot; 1048 osb->osb_commit_interval = parsed_options.commit_interval; 1049 1050 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1051 osb->osb_resv_level = parsed_options.resv_level; 1052 osb->osb_dir_resv_level = parsed_options.resv_level; 1053 if (parsed_options.dir_resv_level == -1) 1054 osb->osb_dir_resv_level = parsed_options.resv_level; 1055 else 1056 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1057 1058 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1059 if (status) 1060 goto read_super_error; 1061 1062 sb->s_magic = OCFS2_SUPER_MAGIC; 1063 1064 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1065 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1066 1067 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1068 * heartbeat=none */ 1069 if (bdev_read_only(sb->s_bdev)) { 1070 if (!(sb->s_flags & MS_RDONLY)) { 1071 status = -EACCES; 1072 mlog(ML_ERROR, "Readonly device detected but readonly " 1073 "mount was not specified.\n"); 1074 goto read_super_error; 1075 } 1076 1077 /* You should not be able to start a local heartbeat 1078 * on a readonly device. */ 1079 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1080 status = -EROFS; 1081 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1082 "device.\n"); 1083 goto read_super_error; 1084 } 1085 1086 status = ocfs2_check_journals_nolocks(osb); 1087 if (status < 0) { 1088 if (status == -EROFS) 1089 mlog(ML_ERROR, "Recovery required on readonly " 1090 "file system, but write access is " 1091 "unavailable.\n"); 1092 else 1093 mlog_errno(status); 1094 goto read_super_error; 1095 } 1096 1097 ocfs2_set_ro_flag(osb, 1); 1098 1099 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1100 "Cluster services will not be used for this mount. " 1101 "Recovery will be skipped.\n", osb->dev_str); 1102 } 1103 1104 if (!ocfs2_is_hard_readonly(osb)) { 1105 if (sb->s_flags & MS_RDONLY) 1106 ocfs2_set_ro_flag(osb, 0); 1107 } 1108 1109 status = ocfs2_verify_heartbeat(osb); 1110 if (status < 0) { 1111 mlog_errno(status); 1112 goto read_super_error; 1113 } 1114 1115 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1116 ocfs2_debugfs_root); 1117 if (!osb->osb_debug_root) { 1118 status = -EINVAL; 1119 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1120 goto read_super_error; 1121 } 1122 1123 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1124 osb->osb_debug_root, 1125 osb, 1126 &ocfs2_osb_debug_fops); 1127 if (!osb->osb_ctxt) { 1128 status = -EINVAL; 1129 mlog_errno(status); 1130 goto read_super_error; 1131 } 1132 1133 if (ocfs2_meta_ecc(osb)) { 1134 status = ocfs2_blockcheck_stats_debugfs_install( 1135 &osb->osb_ecc_stats, 1136 osb->osb_debug_root); 1137 if (status) { 1138 mlog(ML_ERROR, 1139 "Unable to create blockcheck statistics " 1140 "files\n"); 1141 goto read_super_error; 1142 } 1143 } 1144 1145 status = ocfs2_mount_volume(sb); 1146 if (status < 0) 1147 goto read_super_error; 1148 1149 if (osb->root_inode) 1150 inode = igrab(osb->root_inode); 1151 1152 if (!inode) { 1153 status = -EIO; 1154 mlog_errno(status); 1155 goto read_super_error; 1156 } 1157 1158 root = d_make_root(inode); 1159 if (!root) { 1160 status = -ENOMEM; 1161 mlog_errno(status); 1162 goto read_super_error; 1163 } 1164 1165 sb->s_root = root; 1166 1167 ocfs2_complete_mount_recovery(osb); 1168 1169 if (ocfs2_mount_local(osb)) 1170 snprintf(nodestr, sizeof(nodestr), "local"); 1171 else 1172 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1173 1174 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1175 "with %s data mode.\n", 1176 osb->dev_str, nodestr, osb->slot_num, 1177 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1178 "ordered"); 1179 1180 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1181 wake_up(&osb->osb_mount_event); 1182 1183 /* Now we can initialize quotas because we can afford to wait 1184 * for cluster locks recovery now. That also means that truncation 1185 * log recovery can happen but that waits for proper quota setup */ 1186 if (!(sb->s_flags & MS_RDONLY)) { 1187 status = ocfs2_enable_quotas(osb); 1188 if (status < 0) { 1189 /* We have to err-out specially here because 1190 * s_root is already set */ 1191 mlog_errno(status); 1192 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1193 wake_up(&osb->osb_mount_event); 1194 return status; 1195 } 1196 } 1197 1198 ocfs2_complete_quota_recovery(osb); 1199 1200 /* Now we wake up again for processes waiting for quotas */ 1201 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1202 wake_up(&osb->osb_mount_event); 1203 1204 /* Start this when the mount is almost sure of being successful */ 1205 ocfs2_orphan_scan_start(osb); 1206 1207 return status; 1208 1209 read_super_error: 1210 brelse(bh); 1211 1212 if (osb) { 1213 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1214 wake_up(&osb->osb_mount_event); 1215 ocfs2_dismount_volume(sb, 1); 1216 } 1217 1218 if (status) 1219 mlog_errno(status); 1220 return status; 1221 } 1222 1223 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1224 int flags, 1225 const char *dev_name, 1226 void *data) 1227 { 1228 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1229 } 1230 1231 static struct file_system_type ocfs2_fs_type = { 1232 .owner = THIS_MODULE, 1233 .name = "ocfs2", 1234 .mount = ocfs2_mount, 1235 .kill_sb = kill_block_super, 1236 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1237 .next = NULL 1238 }; 1239 MODULE_ALIAS_FS("ocfs2"); 1240 1241 static int ocfs2_check_set_options(struct super_block *sb, 1242 struct mount_options *options) 1243 { 1244 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1245 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1246 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1247 mlog(ML_ERROR, "User quotas were requested, but this " 1248 "filesystem does not have the feature enabled.\n"); 1249 return 0; 1250 } 1251 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1252 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1253 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1254 mlog(ML_ERROR, "Group quotas were requested, but this " 1255 "filesystem does not have the feature enabled.\n"); 1256 return 0; 1257 } 1258 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1259 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1260 mlog(ML_ERROR, "ACL support requested but extended attributes " 1261 "feature is not enabled\n"); 1262 return 0; 1263 } 1264 /* No ACL setting specified? Use XATTR feature... */ 1265 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1266 OCFS2_MOUNT_NO_POSIX_ACL))) { 1267 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1268 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1269 else 1270 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1271 } 1272 return 1; 1273 } 1274 1275 static int ocfs2_parse_options(struct super_block *sb, 1276 char *options, 1277 struct mount_options *mopt, 1278 int is_remount) 1279 { 1280 int status, user_stack = 0; 1281 char *p; 1282 u32 tmp; 1283 int token, option; 1284 substring_t args[MAX_OPT_ARGS]; 1285 1286 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1287 1288 mopt->commit_interval = 0; 1289 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1290 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1291 mopt->slot = OCFS2_INVALID_SLOT; 1292 mopt->localalloc_opt = -1; 1293 mopt->cluster_stack[0] = '\0'; 1294 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1295 mopt->dir_resv_level = -1; 1296 1297 if (!options) { 1298 status = 1; 1299 goto bail; 1300 } 1301 1302 while ((p = strsep(&options, ",")) != NULL) { 1303 if (!*p) 1304 continue; 1305 1306 token = match_token(p, tokens, args); 1307 switch (token) { 1308 case Opt_hb_local: 1309 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1310 break; 1311 case Opt_hb_none: 1312 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1313 break; 1314 case Opt_hb_global: 1315 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1316 break; 1317 case Opt_barrier: 1318 if (match_int(&args[0], &option)) { 1319 status = 0; 1320 goto bail; 1321 } 1322 if (option) 1323 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1324 else 1325 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1326 break; 1327 case Opt_intr: 1328 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1329 break; 1330 case Opt_nointr: 1331 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1332 break; 1333 case Opt_err_panic: 1334 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1335 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1336 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1337 break; 1338 case Opt_err_ro: 1339 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1340 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1341 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1342 break; 1343 case Opt_err_cont: 1344 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1345 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1346 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1347 break; 1348 case Opt_data_ordered: 1349 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1350 break; 1351 case Opt_data_writeback: 1352 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1353 break; 1354 case Opt_user_xattr: 1355 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1356 break; 1357 case Opt_nouser_xattr: 1358 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1359 break; 1360 case Opt_atime_quantum: 1361 if (match_int(&args[0], &option)) { 1362 status = 0; 1363 goto bail; 1364 } 1365 if (option >= 0) 1366 mopt->atime_quantum = option; 1367 break; 1368 case Opt_slot: 1369 if (match_int(&args[0], &option)) { 1370 status = 0; 1371 goto bail; 1372 } 1373 if (option) 1374 mopt->slot = (s16)option; 1375 break; 1376 case Opt_commit: 1377 if (match_int(&args[0], &option)) { 1378 status = 0; 1379 goto bail; 1380 } 1381 if (option < 0) 1382 return 0; 1383 if (option == 0) 1384 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1385 mopt->commit_interval = HZ * option; 1386 break; 1387 case Opt_localalloc: 1388 if (match_int(&args[0], &option)) { 1389 status = 0; 1390 goto bail; 1391 } 1392 if (option >= 0) 1393 mopt->localalloc_opt = option; 1394 break; 1395 case Opt_localflocks: 1396 /* 1397 * Changing this during remount could race 1398 * flock() requests, or "unbalance" existing 1399 * ones (e.g., a lock is taken in one mode but 1400 * dropped in the other). If users care enough 1401 * to flip locking modes during remount, we 1402 * could add a "local" flag to individual 1403 * flock structures for proper tracking of 1404 * state. 1405 */ 1406 if (!is_remount) 1407 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1408 break; 1409 case Opt_stack: 1410 /* Check both that the option we were passed 1411 * is of the right length and that it is a proper 1412 * string of the right length. 1413 */ 1414 if (((args[0].to - args[0].from) != 1415 OCFS2_STACK_LABEL_LEN) || 1416 (strnlen(args[0].from, 1417 OCFS2_STACK_LABEL_LEN) != 1418 OCFS2_STACK_LABEL_LEN)) { 1419 mlog(ML_ERROR, 1420 "Invalid cluster_stack option\n"); 1421 status = 0; 1422 goto bail; 1423 } 1424 memcpy(mopt->cluster_stack, args[0].from, 1425 OCFS2_STACK_LABEL_LEN); 1426 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1427 /* 1428 * Open code the memcmp here as we don't have 1429 * an osb to pass to 1430 * ocfs2_userspace_stack(). 1431 */ 1432 if (memcmp(mopt->cluster_stack, 1433 OCFS2_CLASSIC_CLUSTER_STACK, 1434 OCFS2_STACK_LABEL_LEN)) 1435 user_stack = 1; 1436 break; 1437 case Opt_inode64: 1438 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1439 break; 1440 case Opt_usrquota: 1441 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1442 break; 1443 case Opt_grpquota: 1444 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1445 break; 1446 case Opt_coherency_buffered: 1447 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1448 break; 1449 case Opt_coherency_full: 1450 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1451 break; 1452 case Opt_acl: 1453 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1454 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1455 break; 1456 case Opt_noacl: 1457 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1458 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1459 break; 1460 case Opt_resv_level: 1461 if (is_remount) 1462 break; 1463 if (match_int(&args[0], &option)) { 1464 status = 0; 1465 goto bail; 1466 } 1467 if (option >= OCFS2_MIN_RESV_LEVEL && 1468 option < OCFS2_MAX_RESV_LEVEL) 1469 mopt->resv_level = option; 1470 break; 1471 case Opt_dir_resv_level: 1472 if (is_remount) 1473 break; 1474 if (match_int(&args[0], &option)) { 1475 status = 0; 1476 goto bail; 1477 } 1478 if (option >= OCFS2_MIN_RESV_LEVEL && 1479 option < OCFS2_MAX_RESV_LEVEL) 1480 mopt->dir_resv_level = option; 1481 break; 1482 case Opt_journal_async_commit: 1483 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1484 break; 1485 default: 1486 mlog(ML_ERROR, 1487 "Unrecognized mount option \"%s\" " 1488 "or missing value\n", p); 1489 status = 0; 1490 goto bail; 1491 } 1492 } 1493 1494 if (user_stack == 0) { 1495 /* Ensure only one heartbeat mode */ 1496 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1497 OCFS2_MOUNT_HB_GLOBAL | 1498 OCFS2_MOUNT_HB_NONE); 1499 if (hweight32(tmp) != 1) { 1500 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1501 status = 0; 1502 goto bail; 1503 } 1504 } 1505 1506 status = 1; 1507 1508 bail: 1509 return status; 1510 } 1511 1512 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1513 { 1514 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1515 unsigned long opts = osb->s_mount_opt; 1516 unsigned int local_alloc_megs; 1517 1518 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1519 seq_printf(s, ",_netdev"); 1520 if (opts & OCFS2_MOUNT_HB_LOCAL) 1521 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1522 else 1523 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1524 } else 1525 seq_printf(s, ",%s", OCFS2_HB_NONE); 1526 1527 if (opts & OCFS2_MOUNT_NOINTR) 1528 seq_printf(s, ",nointr"); 1529 1530 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1531 seq_printf(s, ",data=writeback"); 1532 else 1533 seq_printf(s, ",data=ordered"); 1534 1535 if (opts & OCFS2_MOUNT_BARRIER) 1536 seq_printf(s, ",barrier=1"); 1537 1538 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1539 seq_printf(s, ",errors=panic"); 1540 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1541 seq_printf(s, ",errors=continue"); 1542 else 1543 seq_printf(s, ",errors=remount-ro"); 1544 1545 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1546 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1547 1548 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1549 1550 if (osb->osb_commit_interval) 1551 seq_printf(s, ",commit=%u", 1552 (unsigned) (osb->osb_commit_interval / HZ)); 1553 1554 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1555 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1556 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1557 1558 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1559 seq_printf(s, ",localflocks,"); 1560 1561 if (osb->osb_cluster_stack[0]) 1562 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1563 OCFS2_STACK_LABEL_LEN); 1564 if (opts & OCFS2_MOUNT_USRQUOTA) 1565 seq_printf(s, ",usrquota"); 1566 if (opts & OCFS2_MOUNT_GRPQUOTA) 1567 seq_printf(s, ",grpquota"); 1568 1569 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1570 seq_printf(s, ",coherency=buffered"); 1571 else 1572 seq_printf(s, ",coherency=full"); 1573 1574 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1575 seq_printf(s, ",nouser_xattr"); 1576 else 1577 seq_printf(s, ",user_xattr"); 1578 1579 if (opts & OCFS2_MOUNT_INODE64) 1580 seq_printf(s, ",inode64"); 1581 1582 if (opts & OCFS2_MOUNT_POSIX_ACL) 1583 seq_printf(s, ",acl"); 1584 else 1585 seq_printf(s, ",noacl"); 1586 1587 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1588 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1589 1590 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1591 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1592 1593 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1594 seq_printf(s, ",journal_async_commit"); 1595 1596 return 0; 1597 } 1598 1599 static int __init ocfs2_init(void) 1600 { 1601 int status; 1602 1603 status = init_ocfs2_uptodate_cache(); 1604 if (status < 0) 1605 goto out1; 1606 1607 status = ocfs2_initialize_mem_caches(); 1608 if (status < 0) 1609 goto out2; 1610 1611 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1612 if (!ocfs2_wq) { 1613 status = -ENOMEM; 1614 goto out3; 1615 } 1616 1617 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1618 if (!ocfs2_debugfs_root) { 1619 status = -ENOMEM; 1620 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1621 goto out4; 1622 } 1623 1624 ocfs2_set_locking_protocol(); 1625 1626 status = register_quota_format(&ocfs2_quota_format); 1627 if (status < 0) 1628 goto out4; 1629 status = register_filesystem(&ocfs2_fs_type); 1630 if (!status) 1631 return 0; 1632 1633 unregister_quota_format(&ocfs2_quota_format); 1634 out4: 1635 destroy_workqueue(ocfs2_wq); 1636 debugfs_remove(ocfs2_debugfs_root); 1637 out3: 1638 ocfs2_free_mem_caches(); 1639 out2: 1640 exit_ocfs2_uptodate_cache(); 1641 out1: 1642 mlog_errno(status); 1643 return status; 1644 } 1645 1646 static void __exit ocfs2_exit(void) 1647 { 1648 if (ocfs2_wq) { 1649 flush_workqueue(ocfs2_wq); 1650 destroy_workqueue(ocfs2_wq); 1651 } 1652 1653 unregister_quota_format(&ocfs2_quota_format); 1654 1655 debugfs_remove(ocfs2_debugfs_root); 1656 1657 ocfs2_free_mem_caches(); 1658 1659 unregister_filesystem(&ocfs2_fs_type); 1660 1661 exit_ocfs2_uptodate_cache(); 1662 } 1663 1664 static void ocfs2_put_super(struct super_block *sb) 1665 { 1666 trace_ocfs2_put_super(sb); 1667 1668 ocfs2_sync_blockdev(sb); 1669 ocfs2_dismount_volume(sb, 0); 1670 } 1671 1672 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1673 { 1674 struct ocfs2_super *osb; 1675 u32 numbits, freebits; 1676 int status; 1677 struct ocfs2_dinode *bm_lock; 1678 struct buffer_head *bh = NULL; 1679 struct inode *inode = NULL; 1680 1681 trace_ocfs2_statfs(dentry->d_sb, buf); 1682 1683 osb = OCFS2_SB(dentry->d_sb); 1684 1685 inode = ocfs2_get_system_file_inode(osb, 1686 GLOBAL_BITMAP_SYSTEM_INODE, 1687 OCFS2_INVALID_SLOT); 1688 if (!inode) { 1689 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1690 status = -EIO; 1691 goto bail; 1692 } 1693 1694 status = ocfs2_inode_lock(inode, &bh, 0); 1695 if (status < 0) { 1696 mlog_errno(status); 1697 goto bail; 1698 } 1699 1700 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1701 1702 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1703 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1704 1705 buf->f_type = OCFS2_SUPER_MAGIC; 1706 buf->f_bsize = dentry->d_sb->s_blocksize; 1707 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1708 buf->f_blocks = ((sector_t) numbits) * 1709 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1710 buf->f_bfree = ((sector_t) freebits) * 1711 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1712 buf->f_bavail = buf->f_bfree; 1713 buf->f_files = numbits; 1714 buf->f_ffree = freebits; 1715 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1716 & 0xFFFFFFFFUL; 1717 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1718 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1719 1720 brelse(bh); 1721 1722 ocfs2_inode_unlock(inode, 0); 1723 status = 0; 1724 bail: 1725 iput(inode); 1726 1727 if (status) 1728 mlog_errno(status); 1729 1730 return status; 1731 } 1732 1733 static void ocfs2_inode_init_once(void *data) 1734 { 1735 struct ocfs2_inode_info *oi = data; 1736 1737 oi->ip_flags = 0; 1738 oi->ip_open_count = 0; 1739 spin_lock_init(&oi->ip_lock); 1740 ocfs2_extent_map_init(&oi->vfs_inode); 1741 INIT_LIST_HEAD(&oi->ip_io_markers); 1742 oi->ip_dir_start_lookup = 0; 1743 mutex_init(&oi->ip_unaligned_aio); 1744 init_rwsem(&oi->ip_alloc_sem); 1745 init_rwsem(&oi->ip_xattr_sem); 1746 mutex_init(&oi->ip_io_mutex); 1747 1748 oi->ip_blkno = 0ULL; 1749 oi->ip_clusters = 0; 1750 1751 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1752 1753 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1754 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1755 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1756 1757 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1758 &ocfs2_inode_caching_ops); 1759 1760 inode_init_once(&oi->vfs_inode); 1761 } 1762 1763 static int ocfs2_initialize_mem_caches(void) 1764 { 1765 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1766 sizeof(struct ocfs2_inode_info), 1767 0, 1768 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1769 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1770 ocfs2_inode_init_once); 1771 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1772 sizeof(struct ocfs2_dquot), 1773 0, 1774 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1775 SLAB_MEM_SPREAD), 1776 NULL); 1777 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1778 sizeof(struct ocfs2_quota_chunk), 1779 0, 1780 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1781 NULL); 1782 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1783 !ocfs2_qf_chunk_cachep) { 1784 if (ocfs2_inode_cachep) 1785 kmem_cache_destroy(ocfs2_inode_cachep); 1786 if (ocfs2_dquot_cachep) 1787 kmem_cache_destroy(ocfs2_dquot_cachep); 1788 if (ocfs2_qf_chunk_cachep) 1789 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1790 return -ENOMEM; 1791 } 1792 1793 return 0; 1794 } 1795 1796 static void ocfs2_free_mem_caches(void) 1797 { 1798 /* 1799 * Make sure all delayed rcu free inodes are flushed before we 1800 * destroy cache. 1801 */ 1802 rcu_barrier(); 1803 if (ocfs2_inode_cachep) 1804 kmem_cache_destroy(ocfs2_inode_cachep); 1805 ocfs2_inode_cachep = NULL; 1806 1807 if (ocfs2_dquot_cachep) 1808 kmem_cache_destroy(ocfs2_dquot_cachep); 1809 ocfs2_dquot_cachep = NULL; 1810 1811 if (ocfs2_qf_chunk_cachep) 1812 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1813 ocfs2_qf_chunk_cachep = NULL; 1814 } 1815 1816 static int ocfs2_get_sector(struct super_block *sb, 1817 struct buffer_head **bh, 1818 int block, 1819 int sect_size) 1820 { 1821 if (!sb_set_blocksize(sb, sect_size)) { 1822 mlog(ML_ERROR, "unable to set blocksize\n"); 1823 return -EIO; 1824 } 1825 1826 *bh = sb_getblk(sb, block); 1827 if (!*bh) { 1828 mlog_errno(-ENOMEM); 1829 return -ENOMEM; 1830 } 1831 lock_buffer(*bh); 1832 if (!buffer_dirty(*bh)) 1833 clear_buffer_uptodate(*bh); 1834 unlock_buffer(*bh); 1835 ll_rw_block(READ, 1, bh); 1836 wait_on_buffer(*bh); 1837 if (!buffer_uptodate(*bh)) { 1838 mlog_errno(-EIO); 1839 brelse(*bh); 1840 *bh = NULL; 1841 return -EIO; 1842 } 1843 1844 return 0; 1845 } 1846 1847 static int ocfs2_mount_volume(struct super_block *sb) 1848 { 1849 int status = 0; 1850 int unlock_super = 0; 1851 struct ocfs2_super *osb = OCFS2_SB(sb); 1852 1853 if (ocfs2_is_hard_readonly(osb)) 1854 goto leave; 1855 1856 status = ocfs2_dlm_init(osb); 1857 if (status < 0) { 1858 mlog_errno(status); 1859 goto leave; 1860 } 1861 1862 status = ocfs2_super_lock(osb, 1); 1863 if (status < 0) { 1864 mlog_errno(status); 1865 goto leave; 1866 } 1867 unlock_super = 1; 1868 1869 /* This will load up the node map and add ourselves to it. */ 1870 status = ocfs2_find_slot(osb); 1871 if (status < 0) { 1872 mlog_errno(status); 1873 goto leave; 1874 } 1875 1876 /* load all node-local system inodes */ 1877 status = ocfs2_init_local_system_inodes(osb); 1878 if (status < 0) { 1879 mlog_errno(status); 1880 goto leave; 1881 } 1882 1883 status = ocfs2_check_volume(osb); 1884 if (status < 0) { 1885 mlog_errno(status); 1886 goto leave; 1887 } 1888 1889 status = ocfs2_truncate_log_init(osb); 1890 if (status < 0) 1891 mlog_errno(status); 1892 1893 leave: 1894 if (unlock_super) 1895 ocfs2_super_unlock(osb, 1); 1896 1897 return status; 1898 } 1899 1900 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1901 { 1902 int tmp, hangup_needed = 0; 1903 struct ocfs2_super *osb = NULL; 1904 char nodestr[12]; 1905 1906 trace_ocfs2_dismount_volume(sb); 1907 1908 BUG_ON(!sb); 1909 osb = OCFS2_SB(sb); 1910 BUG_ON(!osb); 1911 1912 debugfs_remove(osb->osb_ctxt); 1913 1914 /* Orphan scan should be stopped as early as possible */ 1915 ocfs2_orphan_scan_stop(osb); 1916 1917 ocfs2_disable_quotas(osb); 1918 1919 /* All dquots should be freed by now */ 1920 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1921 /* Wait for worker to be done with the work structure in osb */ 1922 cancel_work_sync(&osb->dquot_drop_work); 1923 1924 ocfs2_shutdown_local_alloc(osb); 1925 1926 ocfs2_truncate_log_shutdown(osb); 1927 1928 /* This will disable recovery and flush any recovery work. */ 1929 ocfs2_recovery_exit(osb); 1930 1931 ocfs2_journal_shutdown(osb); 1932 1933 ocfs2_sync_blockdev(sb); 1934 1935 ocfs2_purge_refcount_trees(osb); 1936 1937 /* No cluster connection means we've failed during mount, so skip 1938 * all the steps which depended on that to complete. */ 1939 if (osb->cconn) { 1940 tmp = ocfs2_super_lock(osb, 1); 1941 if (tmp < 0) { 1942 mlog_errno(tmp); 1943 return; 1944 } 1945 } 1946 1947 if (osb->slot_num != OCFS2_INVALID_SLOT) 1948 ocfs2_put_slot(osb); 1949 1950 if (osb->cconn) 1951 ocfs2_super_unlock(osb, 1); 1952 1953 ocfs2_release_system_inodes(osb); 1954 1955 /* 1956 * If we're dismounting due to mount error, mount.ocfs2 will clean 1957 * up heartbeat. If we're a local mount, there is no heartbeat. 1958 * If we failed before we got a uuid_str yet, we can't stop 1959 * heartbeat. Otherwise, do it. 1960 */ 1961 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1962 !ocfs2_is_hard_readonly(osb)) 1963 hangup_needed = 1; 1964 1965 if (osb->cconn) 1966 ocfs2_dlm_shutdown(osb, hangup_needed); 1967 1968 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1969 debugfs_remove(osb->osb_debug_root); 1970 1971 if (hangup_needed) 1972 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1973 1974 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1975 1976 if (ocfs2_mount_local(osb)) 1977 snprintf(nodestr, sizeof(nodestr), "local"); 1978 else 1979 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1980 1981 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1982 osb->dev_str, nodestr); 1983 1984 ocfs2_delete_osb(osb); 1985 kfree(osb); 1986 sb->s_dev = 0; 1987 sb->s_fs_info = NULL; 1988 } 1989 1990 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1991 unsigned uuid_bytes) 1992 { 1993 int i, ret; 1994 char *ptr; 1995 1996 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1997 1998 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1999 if (osb->uuid_str == NULL) 2000 return -ENOMEM; 2001 2002 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2003 /* print with null */ 2004 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2005 if (ret != 2) /* drop super cleans up */ 2006 return -EINVAL; 2007 /* then only advance past the last char */ 2008 ptr += 2; 2009 } 2010 2011 return 0; 2012 } 2013 2014 /* Make sure entire volume is addressable by our journal. Requires 2015 osb_clusters_at_boot to be valid and for the journal to have been 2016 initialized by ocfs2_journal_init(). */ 2017 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2018 { 2019 int status = 0; 2020 u64 max_block = 2021 ocfs2_clusters_to_blocks(osb->sb, 2022 osb->osb_clusters_at_boot) - 1; 2023 2024 /* 32-bit block number is always OK. */ 2025 if (max_block <= (u32)~0ULL) 2026 goto out; 2027 2028 /* Volume is "huge", so see if our journal is new enough to 2029 support it. */ 2030 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2031 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2032 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2033 JBD2_FEATURE_INCOMPAT_64BIT))) { 2034 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2035 "Enable the 'block64' journal option with tunefs.ocfs2"); 2036 status = -EFBIG; 2037 goto out; 2038 } 2039 2040 out: 2041 return status; 2042 } 2043 2044 static int ocfs2_initialize_super(struct super_block *sb, 2045 struct buffer_head *bh, 2046 int sector_size, 2047 struct ocfs2_blockcheck_stats *stats) 2048 { 2049 int status; 2050 int i, cbits, bbits; 2051 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2052 struct inode *inode = NULL; 2053 struct ocfs2_journal *journal; 2054 struct ocfs2_super *osb; 2055 u64 total_blocks; 2056 2057 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2058 if (!osb) { 2059 status = -ENOMEM; 2060 mlog_errno(status); 2061 goto bail; 2062 } 2063 2064 sb->s_fs_info = osb; 2065 sb->s_op = &ocfs2_sops; 2066 sb->s_d_op = &ocfs2_dentry_ops; 2067 sb->s_export_op = &ocfs2_export_ops; 2068 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2069 sb->dq_op = &ocfs2_quota_operations; 2070 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2071 sb->s_xattr = ocfs2_xattr_handlers; 2072 sb->s_time_gran = 1; 2073 sb->s_flags |= MS_NOATIME; 2074 /* this is needed to support O_LARGEFILE */ 2075 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2076 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2077 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2078 memcpy(sb->s_uuid, di->id2.i_super.s_uuid, 2079 sizeof(di->id2.i_super.s_uuid)); 2080 2081 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2082 2083 for (i = 0; i < 3; i++) 2084 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2085 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2086 2087 osb->sb = sb; 2088 /* Save off for ocfs2_rw_direct */ 2089 osb->s_sectsize_bits = blksize_bits(sector_size); 2090 BUG_ON(!osb->s_sectsize_bits); 2091 2092 spin_lock_init(&osb->dc_task_lock); 2093 init_waitqueue_head(&osb->dc_event); 2094 osb->dc_work_sequence = 0; 2095 osb->dc_wake_sequence = 0; 2096 INIT_LIST_HEAD(&osb->blocked_lock_list); 2097 osb->blocked_lock_count = 0; 2098 spin_lock_init(&osb->osb_lock); 2099 spin_lock_init(&osb->osb_xattr_lock); 2100 ocfs2_init_steal_slots(osb); 2101 2102 mutex_init(&osb->system_file_mutex); 2103 2104 atomic_set(&osb->alloc_stats.moves, 0); 2105 atomic_set(&osb->alloc_stats.local_data, 0); 2106 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2107 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2108 atomic_set(&osb->alloc_stats.bg_extends, 0); 2109 2110 /* Copy the blockcheck stats from the superblock probe */ 2111 osb->osb_ecc_stats = *stats; 2112 2113 ocfs2_init_node_maps(osb); 2114 2115 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2116 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2117 2118 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2119 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2120 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2121 osb->max_slots); 2122 status = -EINVAL; 2123 goto bail; 2124 } 2125 2126 ocfs2_orphan_scan_init(osb); 2127 2128 status = ocfs2_recovery_init(osb); 2129 if (status) { 2130 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2131 mlog_errno(status); 2132 goto bail; 2133 } 2134 2135 init_waitqueue_head(&osb->checkpoint_event); 2136 2137 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2138 2139 osb->slot_num = OCFS2_INVALID_SLOT; 2140 2141 osb->s_xattr_inline_size = le16_to_cpu( 2142 di->id2.i_super.s_xattr_inline_size); 2143 2144 osb->local_alloc_state = OCFS2_LA_UNUSED; 2145 osb->local_alloc_bh = NULL; 2146 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2147 2148 init_waitqueue_head(&osb->osb_mount_event); 2149 2150 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2151 if (status) { 2152 mlog_errno(status); 2153 goto bail; 2154 } 2155 2156 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2157 if (!osb->vol_label) { 2158 mlog(ML_ERROR, "unable to alloc vol label\n"); 2159 status = -ENOMEM; 2160 goto bail; 2161 } 2162 2163 osb->slot_recovery_generations = 2164 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2165 GFP_KERNEL); 2166 if (!osb->slot_recovery_generations) { 2167 status = -ENOMEM; 2168 mlog_errno(status); 2169 goto bail; 2170 } 2171 2172 init_waitqueue_head(&osb->osb_wipe_event); 2173 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2174 sizeof(*osb->osb_orphan_wipes), 2175 GFP_KERNEL); 2176 if (!osb->osb_orphan_wipes) { 2177 status = -ENOMEM; 2178 mlog_errno(status); 2179 goto bail; 2180 } 2181 2182 osb->osb_rf_lock_tree = RB_ROOT; 2183 2184 osb->s_feature_compat = 2185 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2186 osb->s_feature_ro_compat = 2187 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2188 osb->s_feature_incompat = 2189 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2190 2191 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2192 mlog(ML_ERROR, "couldn't mount because of unsupported " 2193 "optional features (%x).\n", i); 2194 status = -EINVAL; 2195 goto bail; 2196 } 2197 if (!(osb->sb->s_flags & MS_RDONLY) && 2198 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2199 mlog(ML_ERROR, "couldn't mount RDWR because of " 2200 "unsupported optional features (%x).\n", i); 2201 status = -EINVAL; 2202 goto bail; 2203 } 2204 2205 if (ocfs2_clusterinfo_valid(osb)) { 2206 osb->osb_stackflags = 2207 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2208 strlcpy(osb->osb_cluster_stack, 2209 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2210 OCFS2_STACK_LABEL_LEN + 1); 2211 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2212 mlog(ML_ERROR, 2213 "couldn't mount because of an invalid " 2214 "cluster stack label (%s) \n", 2215 osb->osb_cluster_stack); 2216 status = -EINVAL; 2217 goto bail; 2218 } 2219 strlcpy(osb->osb_cluster_name, 2220 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2221 OCFS2_CLUSTER_NAME_LEN + 1); 2222 } else { 2223 /* The empty string is identical with classic tools that 2224 * don't know about s_cluster_info. */ 2225 osb->osb_cluster_stack[0] = '\0'; 2226 } 2227 2228 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2229 2230 /* FIXME 2231 * This should be done in ocfs2_journal_init(), but unknown 2232 * ordering issues will cause the filesystem to crash. 2233 * If anyone wants to figure out what part of the code 2234 * refers to osb->journal before ocfs2_journal_init() is run, 2235 * be my guest. 2236 */ 2237 /* initialize our journal structure */ 2238 2239 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2240 if (!journal) { 2241 mlog(ML_ERROR, "unable to alloc journal\n"); 2242 status = -ENOMEM; 2243 goto bail; 2244 } 2245 osb->journal = journal; 2246 journal->j_osb = osb; 2247 2248 atomic_set(&journal->j_num_trans, 0); 2249 init_rwsem(&journal->j_trans_barrier); 2250 init_waitqueue_head(&journal->j_checkpointed); 2251 spin_lock_init(&journal->j_lock); 2252 journal->j_trans_id = (unsigned long) 1; 2253 INIT_LIST_HEAD(&journal->j_la_cleanups); 2254 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2255 journal->j_state = OCFS2_JOURNAL_FREE; 2256 2257 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2258 init_llist_head(&osb->dquot_drop_list); 2259 2260 /* get some pseudo constants for clustersize bits */ 2261 osb->s_clustersize_bits = 2262 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2263 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2264 2265 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2266 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2267 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2268 osb->s_clustersize); 2269 status = -EINVAL; 2270 goto bail; 2271 } 2272 2273 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2274 le32_to_cpu(di->i_clusters)); 2275 2276 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2277 total_blocks); 2278 if (status) { 2279 mlog(ML_ERROR, "Volume too large " 2280 "to mount safely on this system"); 2281 status = -EFBIG; 2282 goto bail; 2283 } 2284 2285 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2286 sizeof(di->id2.i_super.s_uuid))) { 2287 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2288 status = -ENOMEM; 2289 goto bail; 2290 } 2291 2292 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2293 OCFS2_MAX_VOL_LABEL_LEN); 2294 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2295 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2296 osb->first_cluster_group_blkno = 2297 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2298 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2299 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2300 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2301 (unsigned long long)osb->root_blkno, 2302 (unsigned long long)osb->system_dir_blkno, 2303 osb->s_clustersize_bits); 2304 2305 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2306 if (!osb->osb_dlm_debug) { 2307 status = -ENOMEM; 2308 mlog_errno(status); 2309 goto bail; 2310 } 2311 2312 atomic_set(&osb->vol_state, VOLUME_INIT); 2313 2314 /* load root, system_dir, and all global system inodes */ 2315 status = ocfs2_init_global_system_inodes(osb); 2316 if (status < 0) { 2317 mlog_errno(status); 2318 goto bail; 2319 } 2320 2321 /* 2322 * global bitmap 2323 */ 2324 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2325 OCFS2_INVALID_SLOT); 2326 if (!inode) { 2327 status = -EINVAL; 2328 mlog_errno(status); 2329 goto bail; 2330 } 2331 2332 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2333 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2334 iput(inode); 2335 2336 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2337 osb->s_feature_incompat) * 8; 2338 2339 status = ocfs2_init_slot_info(osb); 2340 if (status < 0) { 2341 mlog_errno(status); 2342 goto bail; 2343 } 2344 cleancache_init_shared_fs(sb); 2345 2346 bail: 2347 return status; 2348 } 2349 2350 /* 2351 * will return: -EAGAIN if it is ok to keep searching for superblocks 2352 * -EINVAL if there is a bad superblock 2353 * 0 on success 2354 */ 2355 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2356 struct buffer_head *bh, 2357 u32 blksz, 2358 struct ocfs2_blockcheck_stats *stats) 2359 { 2360 int status = -EAGAIN; 2361 2362 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2363 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2364 /* We have to do a raw check of the feature here */ 2365 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2366 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2367 status = ocfs2_block_check_validate(bh->b_data, 2368 bh->b_size, 2369 &di->i_check, 2370 stats); 2371 if (status) 2372 goto out; 2373 } 2374 status = -EINVAL; 2375 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2376 mlog(ML_ERROR, "found superblock with incorrect block " 2377 "size: found %u, should be %u\n", 2378 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2379 blksz); 2380 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2381 OCFS2_MAJOR_REV_LEVEL || 2382 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2383 OCFS2_MINOR_REV_LEVEL) { 2384 mlog(ML_ERROR, "found superblock with bad version: " 2385 "found %u.%u, should be %u.%u\n", 2386 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2387 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2388 OCFS2_MAJOR_REV_LEVEL, 2389 OCFS2_MINOR_REV_LEVEL); 2390 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2391 mlog(ML_ERROR, "bad block number on superblock: " 2392 "found %llu, should be %llu\n", 2393 (unsigned long long)le64_to_cpu(di->i_blkno), 2394 (unsigned long long)bh->b_blocknr); 2395 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2396 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2397 mlog(ML_ERROR, "bad cluster size found: %u\n", 2398 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2399 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2400 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2401 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2402 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2403 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2404 mlog(ML_ERROR, 2405 "Superblock slots found greater than file system " 2406 "maximum: found %u, max %u\n", 2407 le16_to_cpu(di->id2.i_super.s_max_slots), 2408 OCFS2_MAX_SLOTS); 2409 } else { 2410 /* found it! */ 2411 status = 0; 2412 } 2413 } 2414 2415 out: 2416 if (status && status != -EAGAIN) 2417 mlog_errno(status); 2418 return status; 2419 } 2420 2421 static int ocfs2_check_volume(struct ocfs2_super *osb) 2422 { 2423 int status; 2424 int dirty; 2425 int local; 2426 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2427 * recover 2428 * ourselves. */ 2429 2430 /* Init our journal object. */ 2431 status = ocfs2_journal_init(osb->journal, &dirty); 2432 if (status < 0) { 2433 mlog(ML_ERROR, "Could not initialize journal!\n"); 2434 goto finally; 2435 } 2436 2437 /* Now that journal has been initialized, check to make sure 2438 entire volume is addressable. */ 2439 status = ocfs2_journal_addressable(osb); 2440 if (status) 2441 goto finally; 2442 2443 /* If the journal was unmounted cleanly then we don't want to 2444 * recover anything. Otherwise, journal_load will do that 2445 * dirty work for us :) */ 2446 if (!dirty) { 2447 status = ocfs2_journal_wipe(osb->journal, 0); 2448 if (status < 0) { 2449 mlog_errno(status); 2450 goto finally; 2451 } 2452 } else { 2453 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2454 "unmounted cleanly, recovering it.\n", osb->dev_str); 2455 } 2456 2457 local = ocfs2_mount_local(osb); 2458 2459 /* will play back anything left in the journal. */ 2460 status = ocfs2_journal_load(osb->journal, local, dirty); 2461 if (status < 0) { 2462 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2463 goto finally; 2464 } 2465 2466 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2467 jbd2_journal_set_features(osb->journal->j_journal, 2468 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2469 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2470 else 2471 jbd2_journal_clear_features(osb->journal->j_journal, 2472 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2473 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2474 2475 if (dirty) { 2476 /* recover my local alloc if we didn't unmount cleanly. */ 2477 status = ocfs2_begin_local_alloc_recovery(osb, 2478 osb->slot_num, 2479 &local_alloc); 2480 if (status < 0) { 2481 mlog_errno(status); 2482 goto finally; 2483 } 2484 /* we complete the recovery process after we've marked 2485 * ourselves as mounted. */ 2486 } 2487 2488 status = ocfs2_load_local_alloc(osb); 2489 if (status < 0) { 2490 mlog_errno(status); 2491 goto finally; 2492 } 2493 2494 if (dirty) { 2495 /* Recovery will be completed after we've mounted the 2496 * rest of the volume. */ 2497 osb->dirty = 1; 2498 osb->local_alloc_copy = local_alloc; 2499 local_alloc = NULL; 2500 } 2501 2502 /* go through each journal, trylock it and if you get the 2503 * lock, and it's marked as dirty, set the bit in the recover 2504 * map and launch a recovery thread for it. */ 2505 status = ocfs2_mark_dead_nodes(osb); 2506 if (status < 0) { 2507 mlog_errno(status); 2508 goto finally; 2509 } 2510 2511 status = ocfs2_compute_replay_slots(osb); 2512 if (status < 0) 2513 mlog_errno(status); 2514 2515 finally: 2516 kfree(local_alloc); 2517 2518 if (status) 2519 mlog_errno(status); 2520 return status; 2521 } 2522 2523 /* 2524 * The routine gets called from dismount or close whenever a dismount on 2525 * volume is requested and the osb open count becomes 1. 2526 * It will remove the osb from the global list and also free up all the 2527 * initialized resources and fileobject. 2528 */ 2529 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2530 { 2531 /* This function assumes that the caller has the main osb resource */ 2532 2533 ocfs2_free_slot_info(osb); 2534 2535 kfree(osb->osb_orphan_wipes); 2536 kfree(osb->slot_recovery_generations); 2537 /* FIXME 2538 * This belongs in journal shutdown, but because we have to 2539 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2540 * we free it here. 2541 */ 2542 kfree(osb->journal); 2543 kfree(osb->local_alloc_copy); 2544 kfree(osb->uuid_str); 2545 kfree(osb->vol_label); 2546 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2547 memset(osb, 0, sizeof(struct ocfs2_super)); 2548 } 2549 2550 /* Depending on the mount option passed, perform one of the following: 2551 * Put OCFS2 into a readonly state (default) 2552 * Return EIO so that only the process errs 2553 * Fix the error as if fsck.ocfs2 -y 2554 * panic 2555 */ 2556 static int ocfs2_handle_error(struct super_block *sb) 2557 { 2558 struct ocfs2_super *osb = OCFS2_SB(sb); 2559 int rv = 0; 2560 2561 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2562 pr_crit("On-disk corruption discovered. " 2563 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2564 2565 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2566 panic("OCFS2: (device %s): panic forced after error\n", 2567 sb->s_id); 2568 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2569 pr_crit("OCFS2: Returning error to the calling process.\n"); 2570 rv = -EIO; 2571 } else { /* default option */ 2572 rv = -EROFS; 2573 if (sb->s_flags & MS_RDONLY && 2574 (ocfs2_is_soft_readonly(osb) || 2575 ocfs2_is_hard_readonly(osb))) 2576 return rv; 2577 2578 pr_crit("OCFS2: File system is now read-only.\n"); 2579 sb->s_flags |= MS_RDONLY; 2580 ocfs2_set_ro_flag(osb, 0); 2581 } 2582 2583 return rv; 2584 } 2585 2586 int __ocfs2_error(struct super_block *sb, const char *function, 2587 const char *fmt, ...) 2588 { 2589 struct va_format vaf; 2590 va_list args; 2591 2592 va_start(args, fmt); 2593 vaf.fmt = fmt; 2594 vaf.va = &args; 2595 2596 /* Not using mlog here because we want to show the actual 2597 * function the error came from. */ 2598 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2599 sb->s_id, function, &vaf); 2600 2601 va_end(args); 2602 2603 return ocfs2_handle_error(sb); 2604 } 2605 2606 /* Handle critical errors. This is intentionally more drastic than 2607 * ocfs2_handle_error, so we only use for things like journal errors, 2608 * etc. */ 2609 void __ocfs2_abort(struct super_block *sb, const char *function, 2610 const char *fmt, ...) 2611 { 2612 struct va_format vaf; 2613 va_list args; 2614 2615 va_start(args, fmt); 2616 2617 vaf.fmt = fmt; 2618 vaf.va = &args; 2619 2620 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2621 sb->s_id, function, &vaf); 2622 2623 va_end(args); 2624 2625 /* We don't have the cluster support yet to go straight to 2626 * hard readonly in here. Until then, we want to keep 2627 * ocfs2_abort() so that we can at least mark critical 2628 * errors. 2629 * 2630 * TODO: This should abort the journal and alert other nodes 2631 * that our slot needs recovery. */ 2632 2633 /* Force a panic(). This stinks, but it's better than letting 2634 * things continue without having a proper hard readonly 2635 * here. */ 2636 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2637 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2638 ocfs2_handle_error(sb); 2639 } 2640 2641 /* 2642 * Void signal blockers, because in-kernel sigprocmask() only fails 2643 * when SIG_* is wrong. 2644 */ 2645 void ocfs2_block_signals(sigset_t *oldset) 2646 { 2647 int rc; 2648 sigset_t blocked; 2649 2650 sigfillset(&blocked); 2651 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2652 BUG_ON(rc); 2653 } 2654 2655 void ocfs2_unblock_signals(sigset_t *oldset) 2656 { 2657 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2658 BUG_ON(rc); 2659 } 2660 2661 module_init(ocfs2_init); 2662 module_exit(ocfs2_exit); 2663