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 unsigned long flags; 240 241 out += snprintf(buf + out, len - out, 242 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 243 "Device", osb->dev_str, osb->uuid_str, 244 osb->fs_generation, osb->vol_label); 245 246 out += snprintf(buf + out, len - out, 247 "%10s => State: %d Flags: 0x%lX\n", "Volume", 248 atomic_read(&osb->vol_state), osb->osb_flags); 249 250 out += snprintf(buf + out, len - out, 251 "%10s => Block: %lu Cluster: %d\n", "Sizes", 252 osb->sb->s_blocksize, osb->s_clustersize); 253 254 out += snprintf(buf + out, len - out, 255 "%10s => Compat: 0x%X Incompat: 0x%X " 256 "ROcompat: 0x%X\n", 257 "Features", osb->s_feature_compat, 258 osb->s_feature_incompat, osb->s_feature_ro_compat); 259 260 out += snprintf(buf + out, len - out, 261 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 262 osb->s_mount_opt, osb->s_atime_quantum); 263 264 if (cconn) { 265 out += snprintf(buf + out, len - out, 266 "%10s => Stack: %s Name: %*s " 267 "Version: %d.%d\n", "Cluster", 268 (*osb->osb_cluster_stack == '\0' ? 269 "o2cb" : osb->osb_cluster_stack), 270 cconn->cc_namelen, cconn->cc_name, 271 cconn->cc_version.pv_major, 272 cconn->cc_version.pv_minor); 273 } 274 275 spin_lock_irqsave(&osb->dc_task_lock, flags); 276 out += snprintf(buf + out, len - out, 277 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 278 "WorkSeq: %lu\n", "DownCnvt", 279 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 280 osb->blocked_lock_count, osb->dc_wake_sequence, 281 osb->dc_work_sequence); 282 spin_unlock_irqrestore(&osb->dc_task_lock, flags); 283 284 spin_lock(&osb->osb_lock); 285 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 286 "Recovery", 287 (osb->recovery_thread_task ? 288 task_pid_nr(osb->recovery_thread_task) : -1)); 289 if (rm->rm_used == 0) 290 out += snprintf(buf + out, len - out, " None\n"); 291 else { 292 for (i = 0; i < rm->rm_used; i++) 293 out += snprintf(buf + out, len - out, " %d", 294 rm->rm_entries[i]); 295 out += snprintf(buf + out, len - out, "\n"); 296 } 297 spin_unlock(&osb->osb_lock); 298 299 out += snprintf(buf + out, len - out, 300 "%10s => Pid: %d Interval: %lu\n", "Commit", 301 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 302 osb->osb_commit_interval); 303 304 out += snprintf(buf + out, len - out, 305 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 306 "Journal", osb->journal->j_state, 307 osb->journal->j_trans_id, 308 atomic_read(&osb->journal->j_num_trans)); 309 310 out += snprintf(buf + out, len - out, 311 "%10s => GlobalAllocs: %d LocalAllocs: %d " 312 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 313 "Stats", 314 atomic_read(&osb->alloc_stats.bitmap_data), 315 atomic_read(&osb->alloc_stats.local_data), 316 atomic_read(&osb->alloc_stats.bg_allocs), 317 atomic_read(&osb->alloc_stats.moves), 318 atomic_read(&osb->alloc_stats.bg_extends)); 319 320 out += snprintf(buf + out, len - out, 321 "%10s => State: %u Descriptor: %llu Size: %u bits " 322 "Default: %u bits\n", 323 "LocalAlloc", osb->local_alloc_state, 324 (unsigned long long)osb->la_last_gd, 325 osb->local_alloc_bits, osb->local_alloc_default_bits); 326 327 spin_lock(&osb->osb_lock); 328 out += snprintf(buf + out, len - out, 329 "%10s => InodeSlot: %d StolenInodes: %d, " 330 "MetaSlot: %d StolenMeta: %d\n", "Steal", 331 osb->s_inode_steal_slot, 332 atomic_read(&osb->s_num_inodes_stolen), 333 osb->s_meta_steal_slot, 334 atomic_read(&osb->s_num_meta_stolen)); 335 spin_unlock(&osb->osb_lock); 336 337 out += snprintf(buf + out, len - out, "OrphanScan => "); 338 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 339 os->os_count, os->os_seqno); 340 out += snprintf(buf + out, len - out, " Last Scan: "); 341 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 342 out += snprintf(buf + out, len - out, "Disabled\n"); 343 else 344 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 345 (get_seconds() - os->os_scantime.tv_sec)); 346 347 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 348 "Slots", "Num", "RecoGen"); 349 for (i = 0; i < osb->max_slots; ++i) { 350 out += snprintf(buf + out, len - out, 351 "%10s %c %3d %10d\n", 352 " ", 353 (i == osb->slot_num ? '*' : ' '), 354 i, osb->slot_recovery_generations[i]); 355 } 356 357 return out; 358 } 359 360 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 361 { 362 struct ocfs2_super *osb = inode->i_private; 363 char *buf = NULL; 364 365 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 366 if (!buf) 367 goto bail; 368 369 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 370 371 file->private_data = buf; 372 373 return 0; 374 bail: 375 return -ENOMEM; 376 } 377 378 static int ocfs2_debug_release(struct inode *inode, struct file *file) 379 { 380 kfree(file->private_data); 381 return 0; 382 } 383 384 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 385 size_t nbytes, loff_t *ppos) 386 { 387 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 388 i_size_read(file->f_mapping->host)); 389 } 390 #else 391 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 392 { 393 return 0; 394 } 395 static int ocfs2_debug_release(struct inode *inode, struct file *file) 396 { 397 return 0; 398 } 399 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 400 size_t nbytes, loff_t *ppos) 401 { 402 return 0; 403 } 404 #endif /* CONFIG_DEBUG_FS */ 405 406 static const struct file_operations ocfs2_osb_debug_fops = { 407 .open = ocfs2_osb_debug_open, 408 .release = ocfs2_debug_release, 409 .read = ocfs2_debug_read, 410 .llseek = generic_file_llseek, 411 }; 412 413 static int ocfs2_sync_fs(struct super_block *sb, int wait) 414 { 415 int status; 416 tid_t target; 417 struct ocfs2_super *osb = OCFS2_SB(sb); 418 419 if (ocfs2_is_hard_readonly(osb)) 420 return -EROFS; 421 422 if (wait) { 423 status = ocfs2_flush_truncate_log(osb); 424 if (status < 0) 425 mlog_errno(status); 426 } else { 427 ocfs2_schedule_truncate_log_flush(osb, 0); 428 } 429 430 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 431 &target)) { 432 if (wait) 433 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 434 target); 435 } 436 return 0; 437 } 438 439 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 440 { 441 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 442 && (ino == USER_QUOTA_SYSTEM_INODE 443 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 444 return 0; 445 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 446 && (ino == GROUP_QUOTA_SYSTEM_INODE 447 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 448 return 0; 449 return 1; 450 } 451 452 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 453 { 454 struct inode *new = NULL; 455 int status = 0; 456 int i; 457 458 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 459 if (IS_ERR(new)) { 460 status = PTR_ERR(new); 461 mlog_errno(status); 462 goto bail; 463 } 464 osb->root_inode = new; 465 466 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 467 if (IS_ERR(new)) { 468 status = PTR_ERR(new); 469 mlog_errno(status); 470 goto bail; 471 } 472 osb->sys_root_inode = new; 473 474 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 475 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 476 if (!ocfs2_need_system_inode(osb, i)) 477 continue; 478 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 479 if (!new) { 480 ocfs2_release_system_inodes(osb); 481 status = -EINVAL; 482 mlog_errno(status); 483 /* FIXME: Should ERROR_RO_FS */ 484 mlog(ML_ERROR, "Unable to load system inode %d, " 485 "possibly corrupt fs?", i); 486 goto bail; 487 } 488 // the array now has one ref, so drop this one 489 iput(new); 490 } 491 492 bail: 493 if (status) 494 mlog_errno(status); 495 return status; 496 } 497 498 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 499 { 500 struct inode *new = NULL; 501 int status = 0; 502 int i; 503 504 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 505 i < NUM_SYSTEM_INODES; 506 i++) { 507 if (!ocfs2_need_system_inode(osb, i)) 508 continue; 509 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 510 if (!new) { 511 ocfs2_release_system_inodes(osb); 512 status = -EINVAL; 513 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 514 status, i, osb->slot_num); 515 goto bail; 516 } 517 /* the array now has one ref, so drop this one */ 518 iput(new); 519 } 520 521 bail: 522 if (status) 523 mlog_errno(status); 524 return status; 525 } 526 527 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 528 { 529 int i; 530 struct inode *inode; 531 532 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 533 inode = osb->global_system_inodes[i]; 534 if (inode) { 535 iput(inode); 536 osb->global_system_inodes[i] = NULL; 537 } 538 } 539 540 inode = osb->sys_root_inode; 541 if (inode) { 542 iput(inode); 543 osb->sys_root_inode = NULL; 544 } 545 546 inode = osb->root_inode; 547 if (inode) { 548 iput(inode); 549 osb->root_inode = NULL; 550 } 551 552 if (!osb->local_system_inodes) 553 return; 554 555 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 556 if (osb->local_system_inodes[i]) { 557 iput(osb->local_system_inodes[i]); 558 osb->local_system_inodes[i] = NULL; 559 } 560 } 561 562 kfree(osb->local_system_inodes); 563 osb->local_system_inodes = NULL; 564 } 565 566 /* We're allocating fs objects, use GFP_NOFS */ 567 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 568 { 569 struct ocfs2_inode_info *oi; 570 571 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 572 if (!oi) 573 return NULL; 574 575 oi->i_sync_tid = 0; 576 oi->i_datasync_tid = 0; 577 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 578 579 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 580 return &oi->vfs_inode; 581 } 582 583 static void ocfs2_i_callback(struct rcu_head *head) 584 { 585 struct inode *inode = container_of(head, struct inode, i_rcu); 586 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 587 } 588 589 static void ocfs2_destroy_inode(struct inode *inode) 590 { 591 call_rcu(&inode->i_rcu, ocfs2_i_callback); 592 } 593 594 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 595 unsigned int cbits) 596 { 597 unsigned int bytes = 1 << cbits; 598 unsigned int trim = bytes; 599 unsigned int bitshift = 32; 600 601 /* 602 * i_size and all block offsets in ocfs2 are always 64 bits 603 * wide. i_clusters is 32 bits, in cluster-sized units. So on 604 * 64 bit platforms, cluster size will be the limiting factor. 605 */ 606 607 #if BITS_PER_LONG == 32 608 # if defined(CONFIG_LBDAF) 609 BUILD_BUG_ON(sizeof(sector_t) != 8); 610 /* 611 * We might be limited by page cache size. 612 */ 613 if (bytes > PAGE_CACHE_SIZE) { 614 bytes = PAGE_CACHE_SIZE; 615 trim = 1; 616 /* 617 * Shift by 31 here so that we don't get larger than 618 * MAX_LFS_FILESIZE 619 */ 620 bitshift = 31; 621 } 622 # else 623 /* 624 * We are limited by the size of sector_t. Use block size, as 625 * that's what we expose to the VFS. 626 */ 627 bytes = 1 << bbits; 628 trim = 1; 629 bitshift = 31; 630 # endif 631 #endif 632 633 /* 634 * Trim by a whole cluster when we can actually approach the 635 * on-disk limits. Otherwise we can overflow i_clusters when 636 * an extent start is at the max offset. 637 */ 638 return (((unsigned long long)bytes) << bitshift) - trim; 639 } 640 641 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 642 { 643 int incompat_features; 644 int ret = 0; 645 struct mount_options parsed_options; 646 struct ocfs2_super *osb = OCFS2_SB(sb); 647 u32 tmp; 648 649 sync_filesystem(sb); 650 651 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 652 !ocfs2_check_set_options(sb, &parsed_options)) { 653 ret = -EINVAL; 654 goto out; 655 } 656 657 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 658 OCFS2_MOUNT_HB_NONE; 659 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 660 ret = -EINVAL; 661 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 662 goto out; 663 } 664 665 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 666 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 667 ret = -EINVAL; 668 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 669 goto out; 670 } 671 672 /* Probably don't want this on remount; it might 673 * mess with other nodes */ 674 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 675 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 676 ret = -EINVAL; 677 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 678 goto out; 679 } 680 681 /* We're going to/from readonly mode. */ 682 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 683 /* Disable quota accounting before remounting RO */ 684 if (*flags & MS_RDONLY) { 685 ret = ocfs2_susp_quotas(osb, 0); 686 if (ret < 0) 687 goto out; 688 } 689 /* Lock here so the check of HARD_RO and the potential 690 * setting of SOFT_RO is atomic. */ 691 spin_lock(&osb->osb_lock); 692 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 693 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 694 ret = -EROFS; 695 goto unlock_osb; 696 } 697 698 if (*flags & MS_RDONLY) { 699 sb->s_flags |= MS_RDONLY; 700 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 701 } else { 702 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 703 mlog(ML_ERROR, "Cannot remount RDWR " 704 "filesystem due to previous errors.\n"); 705 ret = -EROFS; 706 goto unlock_osb; 707 } 708 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 709 if (incompat_features) { 710 mlog(ML_ERROR, "Cannot remount RDWR because " 711 "of unsupported optional features " 712 "(%x).\n", incompat_features); 713 ret = -EINVAL; 714 goto unlock_osb; 715 } 716 sb->s_flags &= ~MS_RDONLY; 717 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 718 } 719 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 720 unlock_osb: 721 spin_unlock(&osb->osb_lock); 722 /* Enable quota accounting after remounting RW */ 723 if (!ret && !(*flags & MS_RDONLY)) { 724 if (sb_any_quota_suspended(sb)) 725 ret = ocfs2_susp_quotas(osb, 1); 726 else 727 ret = ocfs2_enable_quotas(osb); 728 if (ret < 0) { 729 /* Return back changes... */ 730 spin_lock(&osb->osb_lock); 731 sb->s_flags |= MS_RDONLY; 732 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 733 spin_unlock(&osb->osb_lock); 734 goto out; 735 } 736 } 737 } 738 739 if (!ret) { 740 /* Only save off the new mount options in case of a successful 741 * remount. */ 742 osb->s_mount_opt = parsed_options.mount_opt; 743 osb->s_atime_quantum = parsed_options.atime_quantum; 744 osb->preferred_slot = parsed_options.slot; 745 if (parsed_options.commit_interval) 746 osb->osb_commit_interval = parsed_options.commit_interval; 747 748 if (!ocfs2_is_hard_readonly(osb)) 749 ocfs2_set_journal_params(osb); 750 751 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 752 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 753 MS_POSIXACL : 0); 754 } 755 out: 756 return ret; 757 } 758 759 static int ocfs2_sb_probe(struct super_block *sb, 760 struct buffer_head **bh, 761 int *sector_size, 762 struct ocfs2_blockcheck_stats *stats) 763 { 764 int status, tmpstat; 765 struct ocfs1_vol_disk_hdr *hdr; 766 struct ocfs2_dinode *di; 767 int blksize; 768 769 *bh = NULL; 770 771 /* may be > 512 */ 772 *sector_size = bdev_logical_block_size(sb->s_bdev); 773 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 774 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 775 *sector_size, OCFS2_MAX_BLOCKSIZE); 776 status = -EINVAL; 777 goto bail; 778 } 779 780 /* Can this really happen? */ 781 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 782 *sector_size = OCFS2_MIN_BLOCKSIZE; 783 784 /* check block zero for old format */ 785 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 786 if (status < 0) { 787 mlog_errno(status); 788 goto bail; 789 } 790 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 791 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 792 mlog(ML_ERROR, "incompatible version: %u.%u\n", 793 hdr->major_version, hdr->minor_version); 794 status = -EINVAL; 795 } 796 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 797 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 798 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 799 hdr->signature); 800 status = -EINVAL; 801 } 802 brelse(*bh); 803 *bh = NULL; 804 if (status < 0) { 805 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 806 "upgraded before mounting with ocfs v2\n"); 807 goto bail; 808 } 809 810 /* 811 * Now check at magic offset for 512, 1024, 2048, 4096 812 * blocksizes. 4096 is the maximum blocksize because it is 813 * the minimum clustersize. 814 */ 815 status = -EINVAL; 816 for (blksize = *sector_size; 817 blksize <= OCFS2_MAX_BLOCKSIZE; 818 blksize <<= 1) { 819 tmpstat = ocfs2_get_sector(sb, bh, 820 OCFS2_SUPER_BLOCK_BLKNO, 821 blksize); 822 if (tmpstat < 0) { 823 status = tmpstat; 824 mlog_errno(status); 825 break; 826 } 827 di = (struct ocfs2_dinode *) (*bh)->b_data; 828 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 829 spin_lock_init(&stats->b_lock); 830 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 831 if (tmpstat < 0) { 832 brelse(*bh); 833 *bh = NULL; 834 } 835 if (tmpstat != -EAGAIN) { 836 status = tmpstat; 837 break; 838 } 839 } 840 841 bail: 842 return status; 843 } 844 845 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 846 { 847 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 848 849 if (osb->s_mount_opt & hb_enabled) { 850 if (ocfs2_mount_local(osb)) { 851 mlog(ML_ERROR, "Cannot heartbeat on a locally " 852 "mounted device.\n"); 853 return -EINVAL; 854 } 855 if (ocfs2_userspace_stack(osb)) { 856 mlog(ML_ERROR, "Userspace stack expected, but " 857 "o2cb heartbeat arguments passed to mount\n"); 858 return -EINVAL; 859 } 860 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 861 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 862 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 863 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 864 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 865 return -EINVAL; 866 } 867 } 868 869 if (!(osb->s_mount_opt & hb_enabled)) { 870 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 871 !ocfs2_userspace_stack(osb)) { 872 mlog(ML_ERROR, "Heartbeat has to be started to mount " 873 "a read-write clustered device.\n"); 874 return -EINVAL; 875 } 876 } 877 878 return 0; 879 } 880 881 /* 882 * If we're using a userspace stack, mount should have passed 883 * a name that matches the disk. If not, mount should not 884 * have passed a stack. 885 */ 886 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 887 struct mount_options *mopt) 888 { 889 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 890 mlog(ML_ERROR, 891 "cluster stack passed to mount, but this filesystem " 892 "does not support it\n"); 893 return -EINVAL; 894 } 895 896 if (ocfs2_userspace_stack(osb) && 897 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 898 OCFS2_STACK_LABEL_LEN)) { 899 mlog(ML_ERROR, 900 "cluster stack passed to mount (\"%s\") does not " 901 "match the filesystem (\"%s\")\n", 902 mopt->cluster_stack, 903 osb->osb_cluster_stack); 904 return -EINVAL; 905 } 906 907 return 0; 908 } 909 910 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 911 { 912 int type; 913 struct super_block *sb = osb->sb; 914 unsigned int feature[OCFS2_MAXQUOTAS] = { 915 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 916 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 917 int status = 0; 918 919 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 920 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 921 continue; 922 if (unsuspend) 923 status = dquot_resume(sb, type); 924 else { 925 struct ocfs2_mem_dqinfo *oinfo; 926 927 /* Cancel periodic syncing before suspending */ 928 oinfo = sb_dqinfo(sb, type)->dqi_priv; 929 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 930 status = dquot_suspend(sb, type); 931 } 932 if (status < 0) 933 break; 934 } 935 if (status < 0) 936 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 937 "remount (error = %d).\n", status); 938 return status; 939 } 940 941 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 942 { 943 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 944 struct super_block *sb = osb->sb; 945 unsigned int feature[OCFS2_MAXQUOTAS] = { 946 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 947 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 948 unsigned int ino[OCFS2_MAXQUOTAS] = { 949 LOCAL_USER_QUOTA_SYSTEM_INODE, 950 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 951 int status; 952 int type; 953 954 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 955 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 956 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 957 continue; 958 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 959 osb->slot_num); 960 if (!inode[type]) { 961 status = -ENOENT; 962 goto out_quota_off; 963 } 964 status = dquot_enable(inode[type], type, QFMT_OCFS2, 965 DQUOT_USAGE_ENABLED); 966 if (status < 0) 967 goto out_quota_off; 968 } 969 970 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 971 iput(inode[type]); 972 return 0; 973 out_quota_off: 974 ocfs2_disable_quotas(osb); 975 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 976 iput(inode[type]); 977 mlog_errno(status); 978 return status; 979 } 980 981 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 982 { 983 int type; 984 struct inode *inode; 985 struct super_block *sb = osb->sb; 986 struct ocfs2_mem_dqinfo *oinfo; 987 988 /* We mostly ignore errors in this function because there's not much 989 * we can do when we see them */ 990 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 991 if (!sb_has_quota_loaded(sb, type)) 992 continue; 993 /* Cancel periodic syncing before we grab dqonoff_mutex */ 994 oinfo = sb_dqinfo(sb, type)->dqi_priv; 995 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 996 inode = igrab(sb->s_dquot.files[type]); 997 /* Turn off quotas. This will remove all dquot structures from 998 * memory and so they will be automatically synced to global 999 * quota files */ 1000 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 1001 DQUOT_LIMITS_ENABLED); 1002 if (!inode) 1003 continue; 1004 iput(inode); 1005 } 1006 } 1007 1008 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1009 { 1010 struct dentry *root; 1011 int status, sector_size; 1012 struct mount_options parsed_options; 1013 struct inode *inode = NULL; 1014 struct ocfs2_super *osb = NULL; 1015 struct buffer_head *bh = NULL; 1016 char nodestr[12]; 1017 struct ocfs2_blockcheck_stats stats; 1018 1019 trace_ocfs2_fill_super(sb, data, silent); 1020 1021 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1022 status = -EINVAL; 1023 goto read_super_error; 1024 } 1025 1026 /* probe for superblock */ 1027 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1028 if (status < 0) { 1029 mlog(ML_ERROR, "superblock probe failed!\n"); 1030 goto read_super_error; 1031 } 1032 1033 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1034 osb = OCFS2_SB(sb); 1035 if (status < 0) { 1036 mlog_errno(status); 1037 goto read_super_error; 1038 } 1039 brelse(bh); 1040 bh = NULL; 1041 1042 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1043 status = -EINVAL; 1044 goto read_super_error; 1045 } 1046 osb->s_mount_opt = parsed_options.mount_opt; 1047 osb->s_atime_quantum = parsed_options.atime_quantum; 1048 osb->preferred_slot = parsed_options.slot; 1049 osb->osb_commit_interval = parsed_options.commit_interval; 1050 1051 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1052 osb->osb_resv_level = parsed_options.resv_level; 1053 osb->osb_dir_resv_level = parsed_options.resv_level; 1054 if (parsed_options.dir_resv_level == -1) 1055 osb->osb_dir_resv_level = parsed_options.resv_level; 1056 else 1057 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1058 1059 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1060 if (status) 1061 goto read_super_error; 1062 1063 sb->s_magic = OCFS2_SUPER_MAGIC; 1064 1065 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1066 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1067 1068 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1069 * heartbeat=none */ 1070 if (bdev_read_only(sb->s_bdev)) { 1071 if (!(sb->s_flags & MS_RDONLY)) { 1072 status = -EACCES; 1073 mlog(ML_ERROR, "Readonly device detected but readonly " 1074 "mount was not specified.\n"); 1075 goto read_super_error; 1076 } 1077 1078 /* You should not be able to start a local heartbeat 1079 * on a readonly device. */ 1080 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1081 status = -EROFS; 1082 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1083 "device.\n"); 1084 goto read_super_error; 1085 } 1086 1087 status = ocfs2_check_journals_nolocks(osb); 1088 if (status < 0) { 1089 if (status == -EROFS) 1090 mlog(ML_ERROR, "Recovery required on readonly " 1091 "file system, but write access is " 1092 "unavailable.\n"); 1093 else 1094 mlog_errno(status); 1095 goto read_super_error; 1096 } 1097 1098 ocfs2_set_ro_flag(osb, 1); 1099 1100 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1101 "Cluster services will not be used for this mount. " 1102 "Recovery will be skipped.\n", osb->dev_str); 1103 } 1104 1105 if (!ocfs2_is_hard_readonly(osb)) { 1106 if (sb->s_flags & MS_RDONLY) 1107 ocfs2_set_ro_flag(osb, 0); 1108 } 1109 1110 status = ocfs2_verify_heartbeat(osb); 1111 if (status < 0) { 1112 mlog_errno(status); 1113 goto read_super_error; 1114 } 1115 1116 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1117 ocfs2_debugfs_root); 1118 if (!osb->osb_debug_root) { 1119 status = -EINVAL; 1120 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1121 goto read_super_error; 1122 } 1123 1124 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1125 osb->osb_debug_root, 1126 osb, 1127 &ocfs2_osb_debug_fops); 1128 if (!osb->osb_ctxt) { 1129 status = -EINVAL; 1130 mlog_errno(status); 1131 goto read_super_error; 1132 } 1133 1134 if (ocfs2_meta_ecc(osb)) { 1135 status = ocfs2_blockcheck_stats_debugfs_install( 1136 &osb->osb_ecc_stats, 1137 osb->osb_debug_root); 1138 if (status) { 1139 mlog(ML_ERROR, 1140 "Unable to create blockcheck statistics " 1141 "files\n"); 1142 goto read_super_error; 1143 } 1144 } 1145 1146 status = ocfs2_mount_volume(sb); 1147 if (status < 0) 1148 goto read_super_error; 1149 1150 if (osb->root_inode) 1151 inode = igrab(osb->root_inode); 1152 1153 if (!inode) { 1154 status = -EIO; 1155 mlog_errno(status); 1156 goto read_super_error; 1157 } 1158 1159 root = d_make_root(inode); 1160 if (!root) { 1161 status = -ENOMEM; 1162 mlog_errno(status); 1163 goto read_super_error; 1164 } 1165 1166 sb->s_root = root; 1167 1168 ocfs2_complete_mount_recovery(osb); 1169 1170 if (ocfs2_mount_local(osb)) 1171 snprintf(nodestr, sizeof(nodestr), "local"); 1172 else 1173 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1174 1175 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1176 "with %s data mode.\n", 1177 osb->dev_str, nodestr, osb->slot_num, 1178 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1179 "ordered"); 1180 1181 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1182 wake_up(&osb->osb_mount_event); 1183 1184 /* Now we can initialize quotas because we can afford to wait 1185 * for cluster locks recovery now. That also means that truncation 1186 * log recovery can happen but that waits for proper quota setup */ 1187 if (!(sb->s_flags & MS_RDONLY)) { 1188 status = ocfs2_enable_quotas(osb); 1189 if (status < 0) { 1190 /* We have to err-out specially here because 1191 * s_root is already set */ 1192 mlog_errno(status); 1193 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1194 wake_up(&osb->osb_mount_event); 1195 return status; 1196 } 1197 } 1198 1199 ocfs2_complete_quota_recovery(osb); 1200 1201 /* Now we wake up again for processes waiting for quotas */ 1202 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1203 wake_up(&osb->osb_mount_event); 1204 1205 /* Start this when the mount is almost sure of being successful */ 1206 ocfs2_orphan_scan_start(osb); 1207 1208 return status; 1209 1210 read_super_error: 1211 brelse(bh); 1212 1213 if (osb) { 1214 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1215 wake_up(&osb->osb_mount_event); 1216 ocfs2_dismount_volume(sb, 1); 1217 } 1218 1219 if (status) 1220 mlog_errno(status); 1221 return status; 1222 } 1223 1224 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1225 int flags, 1226 const char *dev_name, 1227 void *data) 1228 { 1229 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1230 } 1231 1232 static struct file_system_type ocfs2_fs_type = { 1233 .owner = THIS_MODULE, 1234 .name = "ocfs2", 1235 .mount = ocfs2_mount, 1236 .kill_sb = kill_block_super, 1237 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1238 .next = NULL 1239 }; 1240 MODULE_ALIAS_FS("ocfs2"); 1241 1242 static int ocfs2_check_set_options(struct super_block *sb, 1243 struct mount_options *options) 1244 { 1245 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1246 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1247 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1248 mlog(ML_ERROR, "User quotas were requested, but this " 1249 "filesystem does not have the feature enabled.\n"); 1250 return 0; 1251 } 1252 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1253 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1254 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1255 mlog(ML_ERROR, "Group quotas were requested, but this " 1256 "filesystem does not have the feature enabled.\n"); 1257 return 0; 1258 } 1259 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1260 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1261 mlog(ML_ERROR, "ACL support requested but extended attributes " 1262 "feature is not enabled\n"); 1263 return 0; 1264 } 1265 /* No ACL setting specified? Use XATTR feature... */ 1266 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1267 OCFS2_MOUNT_NO_POSIX_ACL))) { 1268 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1269 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1270 else 1271 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1272 } 1273 return 1; 1274 } 1275 1276 static int ocfs2_parse_options(struct super_block *sb, 1277 char *options, 1278 struct mount_options *mopt, 1279 int is_remount) 1280 { 1281 int status, user_stack = 0; 1282 char *p; 1283 u32 tmp; 1284 int token, option; 1285 substring_t args[MAX_OPT_ARGS]; 1286 1287 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1288 1289 mopt->commit_interval = 0; 1290 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1291 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1292 mopt->slot = OCFS2_INVALID_SLOT; 1293 mopt->localalloc_opt = -1; 1294 mopt->cluster_stack[0] = '\0'; 1295 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1296 mopt->dir_resv_level = -1; 1297 1298 if (!options) { 1299 status = 1; 1300 goto bail; 1301 } 1302 1303 while ((p = strsep(&options, ",")) != NULL) { 1304 if (!*p) 1305 continue; 1306 1307 token = match_token(p, tokens, args); 1308 switch (token) { 1309 case Opt_hb_local: 1310 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1311 break; 1312 case Opt_hb_none: 1313 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1314 break; 1315 case Opt_hb_global: 1316 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1317 break; 1318 case Opt_barrier: 1319 if (match_int(&args[0], &option)) { 1320 status = 0; 1321 goto bail; 1322 } 1323 if (option) 1324 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1325 else 1326 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1327 break; 1328 case Opt_intr: 1329 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1330 break; 1331 case Opt_nointr: 1332 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1333 break; 1334 case Opt_err_panic: 1335 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1336 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1337 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1338 break; 1339 case Opt_err_ro: 1340 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1341 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1342 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1343 break; 1344 case Opt_err_cont: 1345 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1346 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1347 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1348 break; 1349 case Opt_data_ordered: 1350 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1351 break; 1352 case Opt_data_writeback: 1353 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1354 break; 1355 case Opt_user_xattr: 1356 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1357 break; 1358 case Opt_nouser_xattr: 1359 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1360 break; 1361 case Opt_atime_quantum: 1362 if (match_int(&args[0], &option)) { 1363 status = 0; 1364 goto bail; 1365 } 1366 if (option >= 0) 1367 mopt->atime_quantum = option; 1368 break; 1369 case Opt_slot: 1370 if (match_int(&args[0], &option)) { 1371 status = 0; 1372 goto bail; 1373 } 1374 if (option) 1375 mopt->slot = (s16)option; 1376 break; 1377 case Opt_commit: 1378 if (match_int(&args[0], &option)) { 1379 status = 0; 1380 goto bail; 1381 } 1382 if (option < 0) 1383 return 0; 1384 if (option == 0) 1385 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1386 mopt->commit_interval = HZ * option; 1387 break; 1388 case Opt_localalloc: 1389 if (match_int(&args[0], &option)) { 1390 status = 0; 1391 goto bail; 1392 } 1393 if (option >= 0) 1394 mopt->localalloc_opt = option; 1395 break; 1396 case Opt_localflocks: 1397 /* 1398 * Changing this during remount could race 1399 * flock() requests, or "unbalance" existing 1400 * ones (e.g., a lock is taken in one mode but 1401 * dropped in the other). If users care enough 1402 * to flip locking modes during remount, we 1403 * could add a "local" flag to individual 1404 * flock structures for proper tracking of 1405 * state. 1406 */ 1407 if (!is_remount) 1408 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1409 break; 1410 case Opt_stack: 1411 /* Check both that the option we were passed 1412 * is of the right length and that it is a proper 1413 * string of the right length. 1414 */ 1415 if (((args[0].to - args[0].from) != 1416 OCFS2_STACK_LABEL_LEN) || 1417 (strnlen(args[0].from, 1418 OCFS2_STACK_LABEL_LEN) != 1419 OCFS2_STACK_LABEL_LEN)) { 1420 mlog(ML_ERROR, 1421 "Invalid cluster_stack option\n"); 1422 status = 0; 1423 goto bail; 1424 } 1425 memcpy(mopt->cluster_stack, args[0].from, 1426 OCFS2_STACK_LABEL_LEN); 1427 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1428 /* 1429 * Open code the memcmp here as we don't have 1430 * an osb to pass to 1431 * ocfs2_userspace_stack(). 1432 */ 1433 if (memcmp(mopt->cluster_stack, 1434 OCFS2_CLASSIC_CLUSTER_STACK, 1435 OCFS2_STACK_LABEL_LEN)) 1436 user_stack = 1; 1437 break; 1438 case Opt_inode64: 1439 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1440 break; 1441 case Opt_usrquota: 1442 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1443 break; 1444 case Opt_grpquota: 1445 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1446 break; 1447 case Opt_coherency_buffered: 1448 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1449 break; 1450 case Opt_coherency_full: 1451 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1452 break; 1453 case Opt_acl: 1454 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1455 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1456 break; 1457 case Opt_noacl: 1458 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1459 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1460 break; 1461 case Opt_resv_level: 1462 if (is_remount) 1463 break; 1464 if (match_int(&args[0], &option)) { 1465 status = 0; 1466 goto bail; 1467 } 1468 if (option >= OCFS2_MIN_RESV_LEVEL && 1469 option < OCFS2_MAX_RESV_LEVEL) 1470 mopt->resv_level = option; 1471 break; 1472 case Opt_dir_resv_level: 1473 if (is_remount) 1474 break; 1475 if (match_int(&args[0], &option)) { 1476 status = 0; 1477 goto bail; 1478 } 1479 if (option >= OCFS2_MIN_RESV_LEVEL && 1480 option < OCFS2_MAX_RESV_LEVEL) 1481 mopt->dir_resv_level = option; 1482 break; 1483 case Opt_journal_async_commit: 1484 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1485 break; 1486 default: 1487 mlog(ML_ERROR, 1488 "Unrecognized mount option \"%s\" " 1489 "or missing value\n", p); 1490 status = 0; 1491 goto bail; 1492 } 1493 } 1494 1495 if (user_stack == 0) { 1496 /* Ensure only one heartbeat mode */ 1497 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1498 OCFS2_MOUNT_HB_GLOBAL | 1499 OCFS2_MOUNT_HB_NONE); 1500 if (hweight32(tmp) != 1) { 1501 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1502 status = 0; 1503 goto bail; 1504 } 1505 } 1506 1507 status = 1; 1508 1509 bail: 1510 return status; 1511 } 1512 1513 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1514 { 1515 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1516 unsigned long opts = osb->s_mount_opt; 1517 unsigned int local_alloc_megs; 1518 1519 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1520 seq_printf(s, ",_netdev"); 1521 if (opts & OCFS2_MOUNT_HB_LOCAL) 1522 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1523 else 1524 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1525 } else 1526 seq_printf(s, ",%s", OCFS2_HB_NONE); 1527 1528 if (opts & OCFS2_MOUNT_NOINTR) 1529 seq_printf(s, ",nointr"); 1530 1531 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1532 seq_printf(s, ",data=writeback"); 1533 else 1534 seq_printf(s, ",data=ordered"); 1535 1536 if (opts & OCFS2_MOUNT_BARRIER) 1537 seq_printf(s, ",barrier=1"); 1538 1539 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1540 seq_printf(s, ",errors=panic"); 1541 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1542 seq_printf(s, ",errors=continue"); 1543 else 1544 seq_printf(s, ",errors=remount-ro"); 1545 1546 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1547 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1548 1549 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1550 1551 if (osb->osb_commit_interval) 1552 seq_printf(s, ",commit=%u", 1553 (unsigned) (osb->osb_commit_interval / HZ)); 1554 1555 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1556 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1557 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1558 1559 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1560 seq_printf(s, ",localflocks,"); 1561 1562 if (osb->osb_cluster_stack[0]) 1563 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1564 OCFS2_STACK_LABEL_LEN); 1565 if (opts & OCFS2_MOUNT_USRQUOTA) 1566 seq_printf(s, ",usrquota"); 1567 if (opts & OCFS2_MOUNT_GRPQUOTA) 1568 seq_printf(s, ",grpquota"); 1569 1570 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1571 seq_printf(s, ",coherency=buffered"); 1572 else 1573 seq_printf(s, ",coherency=full"); 1574 1575 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1576 seq_printf(s, ",nouser_xattr"); 1577 else 1578 seq_printf(s, ",user_xattr"); 1579 1580 if (opts & OCFS2_MOUNT_INODE64) 1581 seq_printf(s, ",inode64"); 1582 1583 if (opts & OCFS2_MOUNT_POSIX_ACL) 1584 seq_printf(s, ",acl"); 1585 else 1586 seq_printf(s, ",noacl"); 1587 1588 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1589 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1590 1591 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1592 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1593 1594 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1595 seq_printf(s, ",journal_async_commit"); 1596 1597 return 0; 1598 } 1599 1600 static int __init ocfs2_init(void) 1601 { 1602 int status; 1603 1604 status = init_ocfs2_uptodate_cache(); 1605 if (status < 0) 1606 goto out1; 1607 1608 status = ocfs2_initialize_mem_caches(); 1609 if (status < 0) 1610 goto out2; 1611 1612 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1613 if (!ocfs2_wq) { 1614 status = -ENOMEM; 1615 goto out3; 1616 } 1617 1618 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1619 if (!ocfs2_debugfs_root) { 1620 status = -ENOMEM; 1621 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1622 goto out4; 1623 } 1624 1625 ocfs2_set_locking_protocol(); 1626 1627 status = register_quota_format(&ocfs2_quota_format); 1628 if (status < 0) 1629 goto out4; 1630 status = register_filesystem(&ocfs2_fs_type); 1631 if (!status) 1632 return 0; 1633 1634 unregister_quota_format(&ocfs2_quota_format); 1635 out4: 1636 destroy_workqueue(ocfs2_wq); 1637 debugfs_remove(ocfs2_debugfs_root); 1638 out3: 1639 ocfs2_free_mem_caches(); 1640 out2: 1641 exit_ocfs2_uptodate_cache(); 1642 out1: 1643 mlog_errno(status); 1644 return status; 1645 } 1646 1647 static void __exit ocfs2_exit(void) 1648 { 1649 if (ocfs2_wq) { 1650 flush_workqueue(ocfs2_wq); 1651 destroy_workqueue(ocfs2_wq); 1652 } 1653 1654 unregister_quota_format(&ocfs2_quota_format); 1655 1656 debugfs_remove(ocfs2_debugfs_root); 1657 1658 ocfs2_free_mem_caches(); 1659 1660 unregister_filesystem(&ocfs2_fs_type); 1661 1662 exit_ocfs2_uptodate_cache(); 1663 } 1664 1665 static void ocfs2_put_super(struct super_block *sb) 1666 { 1667 trace_ocfs2_put_super(sb); 1668 1669 ocfs2_sync_blockdev(sb); 1670 ocfs2_dismount_volume(sb, 0); 1671 } 1672 1673 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1674 { 1675 struct ocfs2_super *osb; 1676 u32 numbits, freebits; 1677 int status; 1678 struct ocfs2_dinode *bm_lock; 1679 struct buffer_head *bh = NULL; 1680 struct inode *inode = NULL; 1681 1682 trace_ocfs2_statfs(dentry->d_sb, buf); 1683 1684 osb = OCFS2_SB(dentry->d_sb); 1685 1686 inode = ocfs2_get_system_file_inode(osb, 1687 GLOBAL_BITMAP_SYSTEM_INODE, 1688 OCFS2_INVALID_SLOT); 1689 if (!inode) { 1690 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1691 status = -EIO; 1692 goto bail; 1693 } 1694 1695 status = ocfs2_inode_lock(inode, &bh, 0); 1696 if (status < 0) { 1697 mlog_errno(status); 1698 goto bail; 1699 } 1700 1701 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1702 1703 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1704 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1705 1706 buf->f_type = OCFS2_SUPER_MAGIC; 1707 buf->f_bsize = dentry->d_sb->s_blocksize; 1708 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1709 buf->f_blocks = ((sector_t) numbits) * 1710 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1711 buf->f_bfree = ((sector_t) freebits) * 1712 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1713 buf->f_bavail = buf->f_bfree; 1714 buf->f_files = numbits; 1715 buf->f_ffree = freebits; 1716 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1717 & 0xFFFFFFFFUL; 1718 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1719 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1720 1721 brelse(bh); 1722 1723 ocfs2_inode_unlock(inode, 0); 1724 status = 0; 1725 bail: 1726 iput(inode); 1727 1728 if (status) 1729 mlog_errno(status); 1730 1731 return status; 1732 } 1733 1734 static void ocfs2_inode_init_once(void *data) 1735 { 1736 struct ocfs2_inode_info *oi = data; 1737 1738 oi->ip_flags = 0; 1739 oi->ip_open_count = 0; 1740 spin_lock_init(&oi->ip_lock); 1741 ocfs2_extent_map_init(&oi->vfs_inode); 1742 INIT_LIST_HEAD(&oi->ip_io_markers); 1743 oi->ip_dir_start_lookup = 0; 1744 mutex_init(&oi->ip_unaligned_aio); 1745 init_rwsem(&oi->ip_alloc_sem); 1746 init_rwsem(&oi->ip_xattr_sem); 1747 mutex_init(&oi->ip_io_mutex); 1748 1749 oi->ip_blkno = 0ULL; 1750 oi->ip_clusters = 0; 1751 1752 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1753 1754 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1755 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1756 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1757 1758 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1759 &ocfs2_inode_caching_ops); 1760 1761 inode_init_once(&oi->vfs_inode); 1762 } 1763 1764 static int ocfs2_initialize_mem_caches(void) 1765 { 1766 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1767 sizeof(struct ocfs2_inode_info), 1768 0, 1769 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1770 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1771 ocfs2_inode_init_once); 1772 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1773 sizeof(struct ocfs2_dquot), 1774 0, 1775 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1776 SLAB_MEM_SPREAD), 1777 NULL); 1778 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1779 sizeof(struct ocfs2_quota_chunk), 1780 0, 1781 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1782 NULL); 1783 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1784 !ocfs2_qf_chunk_cachep) { 1785 if (ocfs2_inode_cachep) 1786 kmem_cache_destroy(ocfs2_inode_cachep); 1787 if (ocfs2_dquot_cachep) 1788 kmem_cache_destroy(ocfs2_dquot_cachep); 1789 if (ocfs2_qf_chunk_cachep) 1790 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1791 return -ENOMEM; 1792 } 1793 1794 return 0; 1795 } 1796 1797 static void ocfs2_free_mem_caches(void) 1798 { 1799 /* 1800 * Make sure all delayed rcu free inodes are flushed before we 1801 * destroy cache. 1802 */ 1803 rcu_barrier(); 1804 if (ocfs2_inode_cachep) 1805 kmem_cache_destroy(ocfs2_inode_cachep); 1806 ocfs2_inode_cachep = NULL; 1807 1808 if (ocfs2_dquot_cachep) 1809 kmem_cache_destroy(ocfs2_dquot_cachep); 1810 ocfs2_dquot_cachep = NULL; 1811 1812 if (ocfs2_qf_chunk_cachep) 1813 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1814 ocfs2_qf_chunk_cachep = NULL; 1815 } 1816 1817 static int ocfs2_get_sector(struct super_block *sb, 1818 struct buffer_head **bh, 1819 int block, 1820 int sect_size) 1821 { 1822 if (!sb_set_blocksize(sb, sect_size)) { 1823 mlog(ML_ERROR, "unable to set blocksize\n"); 1824 return -EIO; 1825 } 1826 1827 *bh = sb_getblk(sb, block); 1828 if (!*bh) { 1829 mlog_errno(-ENOMEM); 1830 return -ENOMEM; 1831 } 1832 lock_buffer(*bh); 1833 if (!buffer_dirty(*bh)) 1834 clear_buffer_uptodate(*bh); 1835 unlock_buffer(*bh); 1836 ll_rw_block(READ, 1, bh); 1837 wait_on_buffer(*bh); 1838 if (!buffer_uptodate(*bh)) { 1839 mlog_errno(-EIO); 1840 brelse(*bh); 1841 *bh = NULL; 1842 return -EIO; 1843 } 1844 1845 return 0; 1846 } 1847 1848 static int ocfs2_mount_volume(struct super_block *sb) 1849 { 1850 int status = 0; 1851 int unlock_super = 0; 1852 struct ocfs2_super *osb = OCFS2_SB(sb); 1853 1854 if (ocfs2_is_hard_readonly(osb)) 1855 goto leave; 1856 1857 status = ocfs2_dlm_init(osb); 1858 if (status < 0) { 1859 mlog_errno(status); 1860 goto leave; 1861 } 1862 1863 status = ocfs2_super_lock(osb, 1); 1864 if (status < 0) { 1865 mlog_errno(status); 1866 goto leave; 1867 } 1868 unlock_super = 1; 1869 1870 /* This will load up the node map and add ourselves to it. */ 1871 status = ocfs2_find_slot(osb); 1872 if (status < 0) { 1873 mlog_errno(status); 1874 goto leave; 1875 } 1876 1877 /* load all node-local system inodes */ 1878 status = ocfs2_init_local_system_inodes(osb); 1879 if (status < 0) { 1880 mlog_errno(status); 1881 goto leave; 1882 } 1883 1884 status = ocfs2_check_volume(osb); 1885 if (status < 0) { 1886 mlog_errno(status); 1887 goto leave; 1888 } 1889 1890 status = ocfs2_truncate_log_init(osb); 1891 if (status < 0) 1892 mlog_errno(status); 1893 1894 leave: 1895 if (unlock_super) 1896 ocfs2_super_unlock(osb, 1); 1897 1898 return status; 1899 } 1900 1901 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1902 { 1903 int tmp, hangup_needed = 0; 1904 struct ocfs2_super *osb = NULL; 1905 char nodestr[12]; 1906 1907 trace_ocfs2_dismount_volume(sb); 1908 1909 BUG_ON(!sb); 1910 osb = OCFS2_SB(sb); 1911 BUG_ON(!osb); 1912 1913 debugfs_remove(osb->osb_ctxt); 1914 1915 /* Orphan scan should be stopped as early as possible */ 1916 ocfs2_orphan_scan_stop(osb); 1917 1918 ocfs2_disable_quotas(osb); 1919 1920 /* All dquots should be freed by now */ 1921 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1922 /* Wait for worker to be done with the work structure in osb */ 1923 cancel_work_sync(&osb->dquot_drop_work); 1924 1925 ocfs2_shutdown_local_alloc(osb); 1926 1927 ocfs2_truncate_log_shutdown(osb); 1928 1929 /* This will disable recovery and flush any recovery work. */ 1930 ocfs2_recovery_exit(osb); 1931 1932 ocfs2_journal_shutdown(osb); 1933 1934 ocfs2_sync_blockdev(sb); 1935 1936 ocfs2_purge_refcount_trees(osb); 1937 1938 /* No cluster connection means we've failed during mount, so skip 1939 * all the steps which depended on that to complete. */ 1940 if (osb->cconn) { 1941 tmp = ocfs2_super_lock(osb, 1); 1942 if (tmp < 0) { 1943 mlog_errno(tmp); 1944 return; 1945 } 1946 } 1947 1948 if (osb->slot_num != OCFS2_INVALID_SLOT) 1949 ocfs2_put_slot(osb); 1950 1951 if (osb->cconn) 1952 ocfs2_super_unlock(osb, 1); 1953 1954 ocfs2_release_system_inodes(osb); 1955 1956 /* 1957 * If we're dismounting due to mount error, mount.ocfs2 will clean 1958 * up heartbeat. If we're a local mount, there is no heartbeat. 1959 * If we failed before we got a uuid_str yet, we can't stop 1960 * heartbeat. Otherwise, do it. 1961 */ 1962 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1963 !ocfs2_is_hard_readonly(osb)) 1964 hangup_needed = 1; 1965 1966 if (osb->cconn) 1967 ocfs2_dlm_shutdown(osb, hangup_needed); 1968 1969 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1970 debugfs_remove(osb->osb_debug_root); 1971 1972 if (hangup_needed) 1973 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1974 1975 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1976 1977 if (ocfs2_mount_local(osb)) 1978 snprintf(nodestr, sizeof(nodestr), "local"); 1979 else 1980 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1981 1982 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1983 osb->dev_str, nodestr); 1984 1985 ocfs2_delete_osb(osb); 1986 kfree(osb); 1987 sb->s_dev = 0; 1988 sb->s_fs_info = NULL; 1989 } 1990 1991 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1992 unsigned uuid_bytes) 1993 { 1994 int i, ret; 1995 char *ptr; 1996 1997 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1998 1999 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2000 if (osb->uuid_str == NULL) 2001 return -ENOMEM; 2002 2003 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2004 /* print with null */ 2005 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2006 if (ret != 2) /* drop super cleans up */ 2007 return -EINVAL; 2008 /* then only advance past the last char */ 2009 ptr += 2; 2010 } 2011 2012 return 0; 2013 } 2014 2015 /* Make sure entire volume is addressable by our journal. Requires 2016 osb_clusters_at_boot to be valid and for the journal to have been 2017 initialized by ocfs2_journal_init(). */ 2018 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2019 { 2020 int status = 0; 2021 u64 max_block = 2022 ocfs2_clusters_to_blocks(osb->sb, 2023 osb->osb_clusters_at_boot) - 1; 2024 2025 /* 32-bit block number is always OK. */ 2026 if (max_block <= (u32)~0ULL) 2027 goto out; 2028 2029 /* Volume is "huge", so see if our journal is new enough to 2030 support it. */ 2031 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2032 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2033 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2034 JBD2_FEATURE_INCOMPAT_64BIT))) { 2035 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2036 "Enable the 'block64' journal option with tunefs.ocfs2"); 2037 status = -EFBIG; 2038 goto out; 2039 } 2040 2041 out: 2042 return status; 2043 } 2044 2045 static int ocfs2_initialize_super(struct super_block *sb, 2046 struct buffer_head *bh, 2047 int sector_size, 2048 struct ocfs2_blockcheck_stats *stats) 2049 { 2050 int status; 2051 int i, cbits, bbits; 2052 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2053 struct inode *inode = NULL; 2054 struct ocfs2_journal *journal; 2055 struct ocfs2_super *osb; 2056 u64 total_blocks; 2057 2058 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2059 if (!osb) { 2060 status = -ENOMEM; 2061 mlog_errno(status); 2062 goto bail; 2063 } 2064 2065 sb->s_fs_info = osb; 2066 sb->s_op = &ocfs2_sops; 2067 sb->s_d_op = &ocfs2_dentry_ops; 2068 sb->s_export_op = &ocfs2_export_ops; 2069 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2070 sb->dq_op = &ocfs2_quota_operations; 2071 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2072 sb->s_xattr = ocfs2_xattr_handlers; 2073 sb->s_time_gran = 1; 2074 sb->s_flags |= MS_NOATIME; 2075 /* this is needed to support O_LARGEFILE */ 2076 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2077 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2078 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2079 memcpy(sb->s_uuid, di->id2.i_super.s_uuid, 2080 sizeof(di->id2.i_super.s_uuid)); 2081 2082 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2083 2084 for (i = 0; i < 3; i++) 2085 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2086 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2087 2088 osb->sb = sb; 2089 /* Save off for ocfs2_rw_direct */ 2090 osb->s_sectsize_bits = blksize_bits(sector_size); 2091 BUG_ON(!osb->s_sectsize_bits); 2092 2093 spin_lock_init(&osb->dc_task_lock); 2094 init_waitqueue_head(&osb->dc_event); 2095 osb->dc_work_sequence = 0; 2096 osb->dc_wake_sequence = 0; 2097 INIT_LIST_HEAD(&osb->blocked_lock_list); 2098 osb->blocked_lock_count = 0; 2099 spin_lock_init(&osb->osb_lock); 2100 spin_lock_init(&osb->osb_xattr_lock); 2101 ocfs2_init_steal_slots(osb); 2102 2103 mutex_init(&osb->system_file_mutex); 2104 2105 atomic_set(&osb->alloc_stats.moves, 0); 2106 atomic_set(&osb->alloc_stats.local_data, 0); 2107 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2108 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2109 atomic_set(&osb->alloc_stats.bg_extends, 0); 2110 2111 /* Copy the blockcheck stats from the superblock probe */ 2112 osb->osb_ecc_stats = *stats; 2113 2114 ocfs2_init_node_maps(osb); 2115 2116 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2117 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2118 2119 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2120 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2121 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2122 osb->max_slots); 2123 status = -EINVAL; 2124 goto bail; 2125 } 2126 2127 ocfs2_orphan_scan_init(osb); 2128 2129 status = ocfs2_recovery_init(osb); 2130 if (status) { 2131 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2132 mlog_errno(status); 2133 goto bail; 2134 } 2135 2136 init_waitqueue_head(&osb->checkpoint_event); 2137 2138 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2139 2140 osb->slot_num = OCFS2_INVALID_SLOT; 2141 2142 osb->s_xattr_inline_size = le16_to_cpu( 2143 di->id2.i_super.s_xattr_inline_size); 2144 2145 osb->local_alloc_state = OCFS2_LA_UNUSED; 2146 osb->local_alloc_bh = NULL; 2147 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2148 2149 init_waitqueue_head(&osb->osb_mount_event); 2150 2151 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2152 if (status) { 2153 mlog_errno(status); 2154 goto bail; 2155 } 2156 2157 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2158 if (!osb->vol_label) { 2159 mlog(ML_ERROR, "unable to alloc vol label\n"); 2160 status = -ENOMEM; 2161 goto bail; 2162 } 2163 2164 osb->slot_recovery_generations = 2165 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2166 GFP_KERNEL); 2167 if (!osb->slot_recovery_generations) { 2168 status = -ENOMEM; 2169 mlog_errno(status); 2170 goto bail; 2171 } 2172 2173 init_waitqueue_head(&osb->osb_wipe_event); 2174 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2175 sizeof(*osb->osb_orphan_wipes), 2176 GFP_KERNEL); 2177 if (!osb->osb_orphan_wipes) { 2178 status = -ENOMEM; 2179 mlog_errno(status); 2180 goto bail; 2181 } 2182 2183 osb->osb_rf_lock_tree = RB_ROOT; 2184 2185 osb->s_feature_compat = 2186 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2187 osb->s_feature_ro_compat = 2188 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2189 osb->s_feature_incompat = 2190 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2191 2192 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2193 mlog(ML_ERROR, "couldn't mount because of unsupported " 2194 "optional features (%x).\n", i); 2195 status = -EINVAL; 2196 goto bail; 2197 } 2198 if (!(osb->sb->s_flags & MS_RDONLY) && 2199 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2200 mlog(ML_ERROR, "couldn't mount RDWR because of " 2201 "unsupported optional features (%x).\n", i); 2202 status = -EINVAL; 2203 goto bail; 2204 } 2205 2206 if (ocfs2_clusterinfo_valid(osb)) { 2207 osb->osb_stackflags = 2208 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2209 strlcpy(osb->osb_cluster_stack, 2210 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2211 OCFS2_STACK_LABEL_LEN + 1); 2212 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2213 mlog(ML_ERROR, 2214 "couldn't mount because of an invalid " 2215 "cluster stack label (%s) \n", 2216 osb->osb_cluster_stack); 2217 status = -EINVAL; 2218 goto bail; 2219 } 2220 strlcpy(osb->osb_cluster_name, 2221 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2222 OCFS2_CLUSTER_NAME_LEN + 1); 2223 } else { 2224 /* The empty string is identical with classic tools that 2225 * don't know about s_cluster_info. */ 2226 osb->osb_cluster_stack[0] = '\0'; 2227 } 2228 2229 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2230 2231 /* FIXME 2232 * This should be done in ocfs2_journal_init(), but unknown 2233 * ordering issues will cause the filesystem to crash. 2234 * If anyone wants to figure out what part of the code 2235 * refers to osb->journal before ocfs2_journal_init() is run, 2236 * be my guest. 2237 */ 2238 /* initialize our journal structure */ 2239 2240 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2241 if (!journal) { 2242 mlog(ML_ERROR, "unable to alloc journal\n"); 2243 status = -ENOMEM; 2244 goto bail; 2245 } 2246 osb->journal = journal; 2247 journal->j_osb = osb; 2248 2249 atomic_set(&journal->j_num_trans, 0); 2250 init_rwsem(&journal->j_trans_barrier); 2251 init_waitqueue_head(&journal->j_checkpointed); 2252 spin_lock_init(&journal->j_lock); 2253 journal->j_trans_id = (unsigned long) 1; 2254 INIT_LIST_HEAD(&journal->j_la_cleanups); 2255 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2256 journal->j_state = OCFS2_JOURNAL_FREE; 2257 2258 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2259 init_llist_head(&osb->dquot_drop_list); 2260 2261 /* get some pseudo constants for clustersize bits */ 2262 osb->s_clustersize_bits = 2263 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2264 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2265 2266 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2267 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2268 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2269 osb->s_clustersize); 2270 status = -EINVAL; 2271 goto bail; 2272 } 2273 2274 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2275 le32_to_cpu(di->i_clusters)); 2276 2277 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2278 total_blocks); 2279 if (status) { 2280 mlog(ML_ERROR, "Volume too large " 2281 "to mount safely on this system"); 2282 status = -EFBIG; 2283 goto bail; 2284 } 2285 2286 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2287 sizeof(di->id2.i_super.s_uuid))) { 2288 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2289 status = -ENOMEM; 2290 goto bail; 2291 } 2292 2293 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2294 OCFS2_MAX_VOL_LABEL_LEN); 2295 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2296 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2297 osb->first_cluster_group_blkno = 2298 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2299 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2300 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2301 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2302 (unsigned long long)osb->root_blkno, 2303 (unsigned long long)osb->system_dir_blkno, 2304 osb->s_clustersize_bits); 2305 2306 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2307 if (!osb->osb_dlm_debug) { 2308 status = -ENOMEM; 2309 mlog_errno(status); 2310 goto bail; 2311 } 2312 2313 atomic_set(&osb->vol_state, VOLUME_INIT); 2314 2315 /* load root, system_dir, and all global system inodes */ 2316 status = ocfs2_init_global_system_inodes(osb); 2317 if (status < 0) { 2318 mlog_errno(status); 2319 goto bail; 2320 } 2321 2322 /* 2323 * global bitmap 2324 */ 2325 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2326 OCFS2_INVALID_SLOT); 2327 if (!inode) { 2328 status = -EINVAL; 2329 mlog_errno(status); 2330 goto bail; 2331 } 2332 2333 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2334 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2335 iput(inode); 2336 2337 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2338 osb->s_feature_incompat) * 8; 2339 2340 status = ocfs2_init_slot_info(osb); 2341 if (status < 0) { 2342 mlog_errno(status); 2343 goto bail; 2344 } 2345 cleancache_init_shared_fs(sb); 2346 2347 bail: 2348 return status; 2349 } 2350 2351 /* 2352 * will return: -EAGAIN if it is ok to keep searching for superblocks 2353 * -EINVAL if there is a bad superblock 2354 * 0 on success 2355 */ 2356 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2357 struct buffer_head *bh, 2358 u32 blksz, 2359 struct ocfs2_blockcheck_stats *stats) 2360 { 2361 int status = -EAGAIN; 2362 2363 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2364 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2365 /* We have to do a raw check of the feature here */ 2366 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2367 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2368 status = ocfs2_block_check_validate(bh->b_data, 2369 bh->b_size, 2370 &di->i_check, 2371 stats); 2372 if (status) 2373 goto out; 2374 } 2375 status = -EINVAL; 2376 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2377 mlog(ML_ERROR, "found superblock with incorrect block " 2378 "size: found %u, should be %u\n", 2379 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2380 blksz); 2381 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2382 OCFS2_MAJOR_REV_LEVEL || 2383 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2384 OCFS2_MINOR_REV_LEVEL) { 2385 mlog(ML_ERROR, "found superblock with bad version: " 2386 "found %u.%u, should be %u.%u\n", 2387 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2388 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2389 OCFS2_MAJOR_REV_LEVEL, 2390 OCFS2_MINOR_REV_LEVEL); 2391 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2392 mlog(ML_ERROR, "bad block number on superblock: " 2393 "found %llu, should be %llu\n", 2394 (unsigned long long)le64_to_cpu(di->i_blkno), 2395 (unsigned long long)bh->b_blocknr); 2396 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2397 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2398 mlog(ML_ERROR, "bad cluster size found: %u\n", 2399 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2400 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2401 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2402 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2403 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2404 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2405 mlog(ML_ERROR, 2406 "Superblock slots found greater than file system " 2407 "maximum: found %u, max %u\n", 2408 le16_to_cpu(di->id2.i_super.s_max_slots), 2409 OCFS2_MAX_SLOTS); 2410 } else { 2411 /* found it! */ 2412 status = 0; 2413 } 2414 } 2415 2416 out: 2417 if (status && status != -EAGAIN) 2418 mlog_errno(status); 2419 return status; 2420 } 2421 2422 static int ocfs2_check_volume(struct ocfs2_super *osb) 2423 { 2424 int status; 2425 int dirty; 2426 int local; 2427 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2428 * recover 2429 * ourselves. */ 2430 2431 /* Init our journal object. */ 2432 status = ocfs2_journal_init(osb->journal, &dirty); 2433 if (status < 0) { 2434 mlog(ML_ERROR, "Could not initialize journal!\n"); 2435 goto finally; 2436 } 2437 2438 /* Now that journal has been initialized, check to make sure 2439 entire volume is addressable. */ 2440 status = ocfs2_journal_addressable(osb); 2441 if (status) 2442 goto finally; 2443 2444 /* If the journal was unmounted cleanly then we don't want to 2445 * recover anything. Otherwise, journal_load will do that 2446 * dirty work for us :) */ 2447 if (!dirty) { 2448 status = ocfs2_journal_wipe(osb->journal, 0); 2449 if (status < 0) { 2450 mlog_errno(status); 2451 goto finally; 2452 } 2453 } else { 2454 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2455 "unmounted cleanly, recovering it.\n", osb->dev_str); 2456 } 2457 2458 local = ocfs2_mount_local(osb); 2459 2460 /* will play back anything left in the journal. */ 2461 status = ocfs2_journal_load(osb->journal, local, dirty); 2462 if (status < 0) { 2463 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2464 goto finally; 2465 } 2466 2467 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2468 jbd2_journal_set_features(osb->journal->j_journal, 2469 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2470 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2471 else 2472 jbd2_journal_clear_features(osb->journal->j_journal, 2473 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2474 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2475 2476 if (dirty) { 2477 /* recover my local alloc if we didn't unmount cleanly. */ 2478 status = ocfs2_begin_local_alloc_recovery(osb, 2479 osb->slot_num, 2480 &local_alloc); 2481 if (status < 0) { 2482 mlog_errno(status); 2483 goto finally; 2484 } 2485 /* we complete the recovery process after we've marked 2486 * ourselves as mounted. */ 2487 } 2488 2489 status = ocfs2_load_local_alloc(osb); 2490 if (status < 0) { 2491 mlog_errno(status); 2492 goto finally; 2493 } 2494 2495 if (dirty) { 2496 /* Recovery will be completed after we've mounted the 2497 * rest of the volume. */ 2498 osb->dirty = 1; 2499 osb->local_alloc_copy = local_alloc; 2500 local_alloc = NULL; 2501 } 2502 2503 /* go through each journal, trylock it and if you get the 2504 * lock, and it's marked as dirty, set the bit in the recover 2505 * map and launch a recovery thread for it. */ 2506 status = ocfs2_mark_dead_nodes(osb); 2507 if (status < 0) { 2508 mlog_errno(status); 2509 goto finally; 2510 } 2511 2512 status = ocfs2_compute_replay_slots(osb); 2513 if (status < 0) 2514 mlog_errno(status); 2515 2516 finally: 2517 kfree(local_alloc); 2518 2519 if (status) 2520 mlog_errno(status); 2521 return status; 2522 } 2523 2524 /* 2525 * The routine gets called from dismount or close whenever a dismount on 2526 * volume is requested and the osb open count becomes 1. 2527 * It will remove the osb from the global list and also free up all the 2528 * initialized resources and fileobject. 2529 */ 2530 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2531 { 2532 /* This function assumes that the caller has the main osb resource */ 2533 2534 ocfs2_free_slot_info(osb); 2535 2536 kfree(osb->osb_orphan_wipes); 2537 kfree(osb->slot_recovery_generations); 2538 /* FIXME 2539 * This belongs in journal shutdown, but because we have to 2540 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2541 * we free it here. 2542 */ 2543 kfree(osb->journal); 2544 kfree(osb->local_alloc_copy); 2545 kfree(osb->uuid_str); 2546 kfree(osb->vol_label); 2547 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2548 memset(osb, 0, sizeof(struct ocfs2_super)); 2549 } 2550 2551 /* Depending on the mount option passed, perform one of the following: 2552 * Put OCFS2 into a readonly state (default) 2553 * Return EIO so that only the process errs 2554 * Fix the error as if fsck.ocfs2 -y 2555 * panic 2556 */ 2557 static int ocfs2_handle_error(struct super_block *sb) 2558 { 2559 struct ocfs2_super *osb = OCFS2_SB(sb); 2560 int rv = 0; 2561 2562 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2563 pr_crit("On-disk corruption discovered. " 2564 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2565 2566 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2567 panic("OCFS2: (device %s): panic forced after error\n", 2568 sb->s_id); 2569 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2570 pr_crit("OCFS2: Returning error to the calling process.\n"); 2571 rv = -EIO; 2572 } else { /* default option */ 2573 rv = -EROFS; 2574 if (sb->s_flags & MS_RDONLY && 2575 (ocfs2_is_soft_readonly(osb) || 2576 ocfs2_is_hard_readonly(osb))) 2577 return rv; 2578 2579 pr_crit("OCFS2: File system is now read-only.\n"); 2580 sb->s_flags |= MS_RDONLY; 2581 ocfs2_set_ro_flag(osb, 0); 2582 } 2583 2584 return rv; 2585 } 2586 2587 int __ocfs2_error(struct super_block *sb, const char *function, 2588 const char *fmt, ...) 2589 { 2590 struct va_format vaf; 2591 va_list args; 2592 2593 va_start(args, fmt); 2594 vaf.fmt = fmt; 2595 vaf.va = &args; 2596 2597 /* Not using mlog here because we want to show the actual 2598 * function the error came from. */ 2599 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2600 sb->s_id, function, &vaf); 2601 2602 va_end(args); 2603 2604 return ocfs2_handle_error(sb); 2605 } 2606 2607 /* Handle critical errors. This is intentionally more drastic than 2608 * ocfs2_handle_error, so we only use for things like journal errors, 2609 * etc. */ 2610 void __ocfs2_abort(struct super_block *sb, const char *function, 2611 const char *fmt, ...) 2612 { 2613 struct va_format vaf; 2614 va_list args; 2615 2616 va_start(args, fmt); 2617 2618 vaf.fmt = fmt; 2619 vaf.va = &args; 2620 2621 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2622 sb->s_id, function, &vaf); 2623 2624 va_end(args); 2625 2626 /* We don't have the cluster support yet to go straight to 2627 * hard readonly in here. Until then, we want to keep 2628 * ocfs2_abort() so that we can at least mark critical 2629 * errors. 2630 * 2631 * TODO: This should abort the journal and alert other nodes 2632 * that our slot needs recovery. */ 2633 2634 /* Force a panic(). This stinks, but it's better than letting 2635 * things continue without having a proper hard readonly 2636 * here. */ 2637 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2638 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2639 ocfs2_handle_error(sb); 2640 } 2641 2642 /* 2643 * Void signal blockers, because in-kernel sigprocmask() only fails 2644 * when SIG_* is wrong. 2645 */ 2646 void ocfs2_block_signals(sigset_t *oldset) 2647 { 2648 int rc; 2649 sigset_t blocked; 2650 2651 sigfillset(&blocked); 2652 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2653 BUG_ON(rc); 2654 } 2655 2656 void ocfs2_unblock_signals(sigset_t *oldset) 2657 { 2658 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2659 BUG_ON(rc); 2660 } 2661 2662 module_init(ocfs2_init); 2663 module_exit(ocfs2_exit); 2664