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 #include "filecheck.h" 78 79 static struct kmem_cache *ocfs2_inode_cachep; 80 struct kmem_cache *ocfs2_dquot_cachep; 81 struct kmem_cache *ocfs2_qf_chunk_cachep; 82 83 static struct dentry *ocfs2_debugfs_root; 84 85 MODULE_AUTHOR("Oracle"); 86 MODULE_LICENSE("GPL"); 87 MODULE_DESCRIPTION("OCFS2 cluster file system"); 88 89 struct mount_options 90 { 91 unsigned long commit_interval; 92 unsigned long mount_opt; 93 unsigned int atime_quantum; 94 signed short slot; 95 int localalloc_opt; 96 unsigned int resv_level; 97 int dir_resv_level; 98 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 99 }; 100 101 static int ocfs2_parse_options(struct super_block *sb, char *options, 102 struct mount_options *mopt, 103 int is_remount); 104 static int ocfs2_check_set_options(struct super_block *sb, 105 struct mount_options *options); 106 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 107 static void ocfs2_put_super(struct super_block *sb); 108 static int ocfs2_mount_volume(struct super_block *sb); 109 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 110 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 111 static int ocfs2_initialize_mem_caches(void); 112 static void ocfs2_free_mem_caches(void); 113 static void ocfs2_delete_osb(struct ocfs2_super *osb); 114 115 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 116 117 static int ocfs2_sync_fs(struct super_block *sb, int wait); 118 119 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 120 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 121 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 122 static int ocfs2_check_volume(struct ocfs2_super *osb); 123 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 124 struct buffer_head *bh, 125 u32 sectsize, 126 struct ocfs2_blockcheck_stats *stats); 127 static int ocfs2_initialize_super(struct super_block *sb, 128 struct buffer_head *bh, 129 int sector_size, 130 struct ocfs2_blockcheck_stats *stats); 131 static int ocfs2_get_sector(struct super_block *sb, 132 struct buffer_head **bh, 133 int block, 134 int sect_size); 135 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 136 static void ocfs2_destroy_inode(struct inode *inode); 137 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 138 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 139 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 140 141 static struct dquot **ocfs2_get_dquots(struct inode *inode) 142 { 143 return OCFS2_I(inode)->i_dquot; 144 } 145 146 static const struct super_operations ocfs2_sops = { 147 .statfs = ocfs2_statfs, 148 .alloc_inode = ocfs2_alloc_inode, 149 .destroy_inode = ocfs2_destroy_inode, 150 .drop_inode = ocfs2_drop_inode, 151 .evict_inode = ocfs2_evict_inode, 152 .sync_fs = ocfs2_sync_fs, 153 .put_super = ocfs2_put_super, 154 .remount_fs = ocfs2_remount, 155 .show_options = ocfs2_show_options, 156 .quota_read = ocfs2_quota_read, 157 .quota_write = ocfs2_quota_write, 158 .get_dquots = ocfs2_get_dquots, 159 }; 160 161 enum { 162 Opt_barrier, 163 Opt_err_panic, 164 Opt_err_ro, 165 Opt_intr, 166 Opt_nointr, 167 Opt_hb_none, 168 Opt_hb_local, 169 Opt_hb_global, 170 Opt_data_ordered, 171 Opt_data_writeback, 172 Opt_atime_quantum, 173 Opt_slot, 174 Opt_commit, 175 Opt_localalloc, 176 Opt_localflocks, 177 Opt_stack, 178 Opt_user_xattr, 179 Opt_nouser_xattr, 180 Opt_inode64, 181 Opt_acl, 182 Opt_noacl, 183 Opt_usrquota, 184 Opt_grpquota, 185 Opt_coherency_buffered, 186 Opt_coherency_full, 187 Opt_resv_level, 188 Opt_dir_resv_level, 189 Opt_journal_async_commit, 190 Opt_err_cont, 191 Opt_err, 192 }; 193 194 static const match_table_t tokens = { 195 {Opt_barrier, "barrier=%u"}, 196 {Opt_err_panic, "errors=panic"}, 197 {Opt_err_ro, "errors=remount-ro"}, 198 {Opt_intr, "intr"}, 199 {Opt_nointr, "nointr"}, 200 {Opt_hb_none, OCFS2_HB_NONE}, 201 {Opt_hb_local, OCFS2_HB_LOCAL}, 202 {Opt_hb_global, OCFS2_HB_GLOBAL}, 203 {Opt_data_ordered, "data=ordered"}, 204 {Opt_data_writeback, "data=writeback"}, 205 {Opt_atime_quantum, "atime_quantum=%u"}, 206 {Opt_slot, "preferred_slot=%u"}, 207 {Opt_commit, "commit=%u"}, 208 {Opt_localalloc, "localalloc=%d"}, 209 {Opt_localflocks, "localflocks"}, 210 {Opt_stack, "cluster_stack=%s"}, 211 {Opt_user_xattr, "user_xattr"}, 212 {Opt_nouser_xattr, "nouser_xattr"}, 213 {Opt_inode64, "inode64"}, 214 {Opt_acl, "acl"}, 215 {Opt_noacl, "noacl"}, 216 {Opt_usrquota, "usrquota"}, 217 {Opt_grpquota, "grpquota"}, 218 {Opt_coherency_buffered, "coherency=buffered"}, 219 {Opt_coherency_full, "coherency=full"}, 220 {Opt_resv_level, "resv_level=%u"}, 221 {Opt_dir_resv_level, "dir_resv_level=%u"}, 222 {Opt_journal_async_commit, "journal_async_commit"}, 223 {Opt_err_cont, "errors=continue"}, 224 {Opt_err, NULL} 225 }; 226 227 #ifdef CONFIG_DEBUG_FS 228 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 229 { 230 struct ocfs2_cluster_connection *cconn = osb->cconn; 231 struct ocfs2_recovery_map *rm = osb->recovery_map; 232 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 233 int i, out = 0; 234 unsigned long flags; 235 236 out += snprintf(buf + out, len - out, 237 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 238 "Device", osb->dev_str, osb->uuid_str, 239 osb->fs_generation, osb->vol_label); 240 241 out += snprintf(buf + out, len - out, 242 "%10s => State: %d Flags: 0x%lX\n", "Volume", 243 atomic_read(&osb->vol_state), osb->osb_flags); 244 245 out += snprintf(buf + out, len - out, 246 "%10s => Block: %lu Cluster: %d\n", "Sizes", 247 osb->sb->s_blocksize, osb->s_clustersize); 248 249 out += snprintf(buf + out, len - out, 250 "%10s => Compat: 0x%X Incompat: 0x%X " 251 "ROcompat: 0x%X\n", 252 "Features", osb->s_feature_compat, 253 osb->s_feature_incompat, osb->s_feature_ro_compat); 254 255 out += snprintf(buf + out, len - out, 256 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 257 osb->s_mount_opt, osb->s_atime_quantum); 258 259 if (cconn) { 260 out += snprintf(buf + out, len - out, 261 "%10s => Stack: %s Name: %*s " 262 "Version: %d.%d\n", "Cluster", 263 (*osb->osb_cluster_stack == '\0' ? 264 "o2cb" : osb->osb_cluster_stack), 265 cconn->cc_namelen, cconn->cc_name, 266 cconn->cc_version.pv_major, 267 cconn->cc_version.pv_minor); 268 } 269 270 spin_lock_irqsave(&osb->dc_task_lock, flags); 271 out += snprintf(buf + out, len - out, 272 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 273 "WorkSeq: %lu\n", "DownCnvt", 274 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 275 osb->blocked_lock_count, osb->dc_wake_sequence, 276 osb->dc_work_sequence); 277 spin_unlock_irqrestore(&osb->dc_task_lock, flags); 278 279 spin_lock(&osb->osb_lock); 280 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 281 "Recovery", 282 (osb->recovery_thread_task ? 283 task_pid_nr(osb->recovery_thread_task) : -1)); 284 if (rm->rm_used == 0) 285 out += snprintf(buf + out, len - out, " None\n"); 286 else { 287 for (i = 0; i < rm->rm_used; i++) 288 out += snprintf(buf + out, len - out, " %d", 289 rm->rm_entries[i]); 290 out += snprintf(buf + out, len - out, "\n"); 291 } 292 spin_unlock(&osb->osb_lock); 293 294 out += snprintf(buf + out, len - out, 295 "%10s => Pid: %d Interval: %lu\n", "Commit", 296 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 297 osb->osb_commit_interval); 298 299 out += snprintf(buf + out, len - out, 300 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 301 "Journal", osb->journal->j_state, 302 osb->journal->j_trans_id, 303 atomic_read(&osb->journal->j_num_trans)); 304 305 out += snprintf(buf + out, len - out, 306 "%10s => GlobalAllocs: %d LocalAllocs: %d " 307 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 308 "Stats", 309 atomic_read(&osb->alloc_stats.bitmap_data), 310 atomic_read(&osb->alloc_stats.local_data), 311 atomic_read(&osb->alloc_stats.bg_allocs), 312 atomic_read(&osb->alloc_stats.moves), 313 atomic_read(&osb->alloc_stats.bg_extends)); 314 315 out += snprintf(buf + out, len - out, 316 "%10s => State: %u Descriptor: %llu Size: %u bits " 317 "Default: %u bits\n", 318 "LocalAlloc", osb->local_alloc_state, 319 (unsigned long long)osb->la_last_gd, 320 osb->local_alloc_bits, osb->local_alloc_default_bits); 321 322 spin_lock(&osb->osb_lock); 323 out += snprintf(buf + out, len - out, 324 "%10s => InodeSlot: %d StolenInodes: %d, " 325 "MetaSlot: %d StolenMeta: %d\n", "Steal", 326 osb->s_inode_steal_slot, 327 atomic_read(&osb->s_num_inodes_stolen), 328 osb->s_meta_steal_slot, 329 atomic_read(&osb->s_num_meta_stolen)); 330 spin_unlock(&osb->osb_lock); 331 332 out += snprintf(buf + out, len - out, "OrphanScan => "); 333 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 334 os->os_count, os->os_seqno); 335 out += snprintf(buf + out, len - out, " Last Scan: "); 336 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 337 out += snprintf(buf + out, len - out, "Disabled\n"); 338 else 339 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 340 (get_seconds() - os->os_scantime.tv_sec)); 341 342 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 343 "Slots", "Num", "RecoGen"); 344 for (i = 0; i < osb->max_slots; ++i) { 345 out += snprintf(buf + out, len - out, 346 "%10s %c %3d %10d\n", 347 " ", 348 (i == osb->slot_num ? '*' : ' '), 349 i, osb->slot_recovery_generations[i]); 350 } 351 352 return out; 353 } 354 355 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 356 { 357 struct ocfs2_super *osb = inode->i_private; 358 char *buf = NULL; 359 360 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 361 if (!buf) 362 goto bail; 363 364 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 365 366 file->private_data = buf; 367 368 return 0; 369 bail: 370 return -ENOMEM; 371 } 372 373 static int ocfs2_debug_release(struct inode *inode, struct file *file) 374 { 375 kfree(file->private_data); 376 return 0; 377 } 378 379 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 380 size_t nbytes, loff_t *ppos) 381 { 382 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 383 i_size_read(file->f_mapping->host)); 384 } 385 #else 386 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 387 { 388 return 0; 389 } 390 static int ocfs2_debug_release(struct inode *inode, struct file *file) 391 { 392 return 0; 393 } 394 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 395 size_t nbytes, loff_t *ppos) 396 { 397 return 0; 398 } 399 #endif /* CONFIG_DEBUG_FS */ 400 401 static const struct file_operations ocfs2_osb_debug_fops = { 402 .open = ocfs2_osb_debug_open, 403 .release = ocfs2_debug_release, 404 .read = ocfs2_debug_read, 405 .llseek = generic_file_llseek, 406 }; 407 408 static int ocfs2_sync_fs(struct super_block *sb, int wait) 409 { 410 int status; 411 tid_t target; 412 struct ocfs2_super *osb = OCFS2_SB(sb); 413 414 if (ocfs2_is_hard_readonly(osb)) 415 return -EROFS; 416 417 if (wait) { 418 status = ocfs2_flush_truncate_log(osb); 419 if (status < 0) 420 mlog_errno(status); 421 } else { 422 ocfs2_schedule_truncate_log_flush(osb, 0); 423 } 424 425 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 426 &target)) { 427 if (wait) 428 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 429 target); 430 } 431 return 0; 432 } 433 434 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 435 { 436 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 437 && (ino == USER_QUOTA_SYSTEM_INODE 438 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 439 return 0; 440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 441 && (ino == GROUP_QUOTA_SYSTEM_INODE 442 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 443 return 0; 444 return 1; 445 } 446 447 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 448 { 449 struct inode *new = NULL; 450 int status = 0; 451 int i; 452 453 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 454 if (IS_ERR(new)) { 455 status = PTR_ERR(new); 456 mlog_errno(status); 457 goto bail; 458 } 459 osb->root_inode = new; 460 461 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 462 if (IS_ERR(new)) { 463 status = PTR_ERR(new); 464 mlog_errno(status); 465 goto bail; 466 } 467 osb->sys_root_inode = new; 468 469 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 470 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 471 if (!ocfs2_need_system_inode(osb, i)) 472 continue; 473 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 474 if (!new) { 475 ocfs2_release_system_inodes(osb); 476 status = -EINVAL; 477 mlog_errno(status); 478 /* FIXME: Should ERROR_RO_FS */ 479 mlog(ML_ERROR, "Unable to load system inode %d, " 480 "possibly corrupt fs?", i); 481 goto bail; 482 } 483 // the array now has one ref, so drop this one 484 iput(new); 485 } 486 487 bail: 488 if (status) 489 mlog_errno(status); 490 return status; 491 } 492 493 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 494 { 495 struct inode *new = NULL; 496 int status = 0; 497 int i; 498 499 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 500 i < NUM_SYSTEM_INODES; 501 i++) { 502 if (!ocfs2_need_system_inode(osb, i)) 503 continue; 504 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 505 if (!new) { 506 ocfs2_release_system_inodes(osb); 507 status = -EINVAL; 508 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 509 status, i, osb->slot_num); 510 goto bail; 511 } 512 /* the array now has one ref, so drop this one */ 513 iput(new); 514 } 515 516 bail: 517 if (status) 518 mlog_errno(status); 519 return status; 520 } 521 522 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 523 { 524 int i; 525 struct inode *inode; 526 527 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 528 inode = osb->global_system_inodes[i]; 529 if (inode) { 530 iput(inode); 531 osb->global_system_inodes[i] = NULL; 532 } 533 } 534 535 inode = osb->sys_root_inode; 536 if (inode) { 537 iput(inode); 538 osb->sys_root_inode = NULL; 539 } 540 541 inode = osb->root_inode; 542 if (inode) { 543 iput(inode); 544 osb->root_inode = NULL; 545 } 546 547 if (!osb->local_system_inodes) 548 return; 549 550 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 551 if (osb->local_system_inodes[i]) { 552 iput(osb->local_system_inodes[i]); 553 osb->local_system_inodes[i] = NULL; 554 } 555 } 556 557 kfree(osb->local_system_inodes); 558 osb->local_system_inodes = NULL; 559 } 560 561 /* We're allocating fs objects, use GFP_NOFS */ 562 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 563 { 564 struct ocfs2_inode_info *oi; 565 566 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 567 if (!oi) 568 return NULL; 569 570 oi->i_sync_tid = 0; 571 oi->i_datasync_tid = 0; 572 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 573 574 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 575 return &oi->vfs_inode; 576 } 577 578 static void ocfs2_i_callback(struct rcu_head *head) 579 { 580 struct inode *inode = container_of(head, struct inode, i_rcu); 581 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 582 } 583 584 static void ocfs2_destroy_inode(struct inode *inode) 585 { 586 call_rcu(&inode->i_rcu, ocfs2_i_callback); 587 } 588 589 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 590 unsigned int cbits) 591 { 592 unsigned int bytes = 1 << cbits; 593 unsigned int trim = bytes; 594 unsigned int bitshift = 32; 595 596 /* 597 * i_size and all block offsets in ocfs2 are always 64 bits 598 * wide. i_clusters is 32 bits, in cluster-sized units. So on 599 * 64 bit platforms, cluster size will be the limiting factor. 600 */ 601 602 #if BITS_PER_LONG == 32 603 # if defined(CONFIG_LBDAF) 604 BUILD_BUG_ON(sizeof(sector_t) != 8); 605 /* 606 * We might be limited by page cache size. 607 */ 608 if (bytes > PAGE_SIZE) { 609 bytes = PAGE_SIZE; 610 trim = 1; 611 /* 612 * Shift by 31 here so that we don't get larger than 613 * MAX_LFS_FILESIZE 614 */ 615 bitshift = 31; 616 } 617 # else 618 /* 619 * We are limited by the size of sector_t. Use block size, as 620 * that's what we expose to the VFS. 621 */ 622 bytes = 1 << bbits; 623 trim = 1; 624 bitshift = 31; 625 # endif 626 #endif 627 628 /* 629 * Trim by a whole cluster when we can actually approach the 630 * on-disk limits. Otherwise we can overflow i_clusters when 631 * an extent start is at the max offset. 632 */ 633 return (((unsigned long long)bytes) << bitshift) - trim; 634 } 635 636 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 637 { 638 int incompat_features; 639 int ret = 0; 640 struct mount_options parsed_options; 641 struct ocfs2_super *osb = OCFS2_SB(sb); 642 u32 tmp; 643 644 sync_filesystem(sb); 645 646 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 647 !ocfs2_check_set_options(sb, &parsed_options)) { 648 ret = -EINVAL; 649 goto out; 650 } 651 652 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 653 OCFS2_MOUNT_HB_NONE; 654 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 655 ret = -EINVAL; 656 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 657 goto out; 658 } 659 660 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 661 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 662 ret = -EINVAL; 663 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 664 goto out; 665 } 666 667 /* Probably don't want this on remount; it might 668 * mess with other nodes */ 669 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 670 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 671 ret = -EINVAL; 672 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 673 goto out; 674 } 675 676 /* We're going to/from readonly mode. */ 677 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 678 /* Disable quota accounting before remounting RO */ 679 if (*flags & MS_RDONLY) { 680 ret = ocfs2_susp_quotas(osb, 0); 681 if (ret < 0) 682 goto out; 683 } 684 /* Lock here so the check of HARD_RO and the potential 685 * setting of SOFT_RO is atomic. */ 686 spin_lock(&osb->osb_lock); 687 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 688 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 689 ret = -EROFS; 690 goto unlock_osb; 691 } 692 693 if (*flags & MS_RDONLY) { 694 sb->s_flags |= MS_RDONLY; 695 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 696 } else { 697 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 698 mlog(ML_ERROR, "Cannot remount RDWR " 699 "filesystem due to previous errors.\n"); 700 ret = -EROFS; 701 goto unlock_osb; 702 } 703 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 704 if (incompat_features) { 705 mlog(ML_ERROR, "Cannot remount RDWR because " 706 "of unsupported optional features " 707 "(%x).\n", incompat_features); 708 ret = -EINVAL; 709 goto unlock_osb; 710 } 711 sb->s_flags &= ~MS_RDONLY; 712 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 713 } 714 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 715 unlock_osb: 716 spin_unlock(&osb->osb_lock); 717 /* Enable quota accounting after remounting RW */ 718 if (!ret && !(*flags & MS_RDONLY)) { 719 if (sb_any_quota_suspended(sb)) 720 ret = ocfs2_susp_quotas(osb, 1); 721 else 722 ret = ocfs2_enable_quotas(osb); 723 if (ret < 0) { 724 /* Return back changes... */ 725 spin_lock(&osb->osb_lock); 726 sb->s_flags |= MS_RDONLY; 727 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 728 spin_unlock(&osb->osb_lock); 729 goto out; 730 } 731 } 732 } 733 734 if (!ret) { 735 /* Only save off the new mount options in case of a successful 736 * remount. */ 737 osb->s_mount_opt = parsed_options.mount_opt; 738 osb->s_atime_quantum = parsed_options.atime_quantum; 739 osb->preferred_slot = parsed_options.slot; 740 if (parsed_options.commit_interval) 741 osb->osb_commit_interval = parsed_options.commit_interval; 742 743 if (!ocfs2_is_hard_readonly(osb)) 744 ocfs2_set_journal_params(osb); 745 746 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 747 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 748 MS_POSIXACL : 0); 749 } 750 out: 751 return ret; 752 } 753 754 static int ocfs2_sb_probe(struct super_block *sb, 755 struct buffer_head **bh, 756 int *sector_size, 757 struct ocfs2_blockcheck_stats *stats) 758 { 759 int status, tmpstat; 760 struct ocfs1_vol_disk_hdr *hdr; 761 struct ocfs2_dinode *di; 762 int blksize; 763 764 *bh = NULL; 765 766 /* may be > 512 */ 767 *sector_size = bdev_logical_block_size(sb->s_bdev); 768 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 769 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 770 *sector_size, OCFS2_MAX_BLOCKSIZE); 771 status = -EINVAL; 772 goto bail; 773 } 774 775 /* Can this really happen? */ 776 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 777 *sector_size = OCFS2_MIN_BLOCKSIZE; 778 779 /* check block zero for old format */ 780 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 781 if (status < 0) { 782 mlog_errno(status); 783 goto bail; 784 } 785 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 786 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 787 mlog(ML_ERROR, "incompatible version: %u.%u\n", 788 hdr->major_version, hdr->minor_version); 789 status = -EINVAL; 790 } 791 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 792 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 793 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 794 hdr->signature); 795 status = -EINVAL; 796 } 797 brelse(*bh); 798 *bh = NULL; 799 if (status < 0) { 800 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 801 "upgraded before mounting with ocfs v2\n"); 802 goto bail; 803 } 804 805 /* 806 * Now check at magic offset for 512, 1024, 2048, 4096 807 * blocksizes. 4096 is the maximum blocksize because it is 808 * the minimum clustersize. 809 */ 810 status = -EINVAL; 811 for (blksize = *sector_size; 812 blksize <= OCFS2_MAX_BLOCKSIZE; 813 blksize <<= 1) { 814 tmpstat = ocfs2_get_sector(sb, bh, 815 OCFS2_SUPER_BLOCK_BLKNO, 816 blksize); 817 if (tmpstat < 0) { 818 status = tmpstat; 819 mlog_errno(status); 820 break; 821 } 822 di = (struct ocfs2_dinode *) (*bh)->b_data; 823 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 824 spin_lock_init(&stats->b_lock); 825 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 826 if (tmpstat < 0) { 827 brelse(*bh); 828 *bh = NULL; 829 } 830 if (tmpstat != -EAGAIN) { 831 status = tmpstat; 832 break; 833 } 834 } 835 836 bail: 837 return status; 838 } 839 840 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 841 { 842 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 843 844 if (osb->s_mount_opt & hb_enabled) { 845 if (ocfs2_mount_local(osb)) { 846 mlog(ML_ERROR, "Cannot heartbeat on a locally " 847 "mounted device.\n"); 848 return -EINVAL; 849 } 850 if (ocfs2_userspace_stack(osb)) { 851 mlog(ML_ERROR, "Userspace stack expected, but " 852 "o2cb heartbeat arguments passed to mount\n"); 853 return -EINVAL; 854 } 855 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 856 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 857 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 858 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 859 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 860 return -EINVAL; 861 } 862 } 863 864 if (!(osb->s_mount_opt & hb_enabled)) { 865 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 866 !ocfs2_userspace_stack(osb)) { 867 mlog(ML_ERROR, "Heartbeat has to be started to mount " 868 "a read-write clustered device.\n"); 869 return -EINVAL; 870 } 871 } 872 873 return 0; 874 } 875 876 /* 877 * If we're using a userspace stack, mount should have passed 878 * a name that matches the disk. If not, mount should not 879 * have passed a stack. 880 */ 881 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 882 struct mount_options *mopt) 883 { 884 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 885 mlog(ML_ERROR, 886 "cluster stack passed to mount, but this filesystem " 887 "does not support it\n"); 888 return -EINVAL; 889 } 890 891 if (ocfs2_userspace_stack(osb) && 892 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 893 OCFS2_STACK_LABEL_LEN)) { 894 mlog(ML_ERROR, 895 "cluster stack passed to mount (\"%s\") does not " 896 "match the filesystem (\"%s\")\n", 897 mopt->cluster_stack, 898 osb->osb_cluster_stack); 899 return -EINVAL; 900 } 901 902 return 0; 903 } 904 905 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 906 { 907 int type; 908 struct super_block *sb = osb->sb; 909 unsigned int feature[OCFS2_MAXQUOTAS] = { 910 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 911 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 912 int status = 0; 913 914 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 915 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 916 continue; 917 if (unsuspend) 918 status = dquot_resume(sb, type); 919 else { 920 struct ocfs2_mem_dqinfo *oinfo; 921 922 /* Cancel periodic syncing before suspending */ 923 oinfo = sb_dqinfo(sb, type)->dqi_priv; 924 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 925 status = dquot_suspend(sb, type); 926 } 927 if (status < 0) 928 break; 929 } 930 if (status < 0) 931 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 932 "remount (error = %d).\n", status); 933 return status; 934 } 935 936 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 937 { 938 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 939 struct super_block *sb = osb->sb; 940 unsigned int feature[OCFS2_MAXQUOTAS] = { 941 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 942 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 943 unsigned int ino[OCFS2_MAXQUOTAS] = { 944 LOCAL_USER_QUOTA_SYSTEM_INODE, 945 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 946 int status; 947 int type; 948 949 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 950 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 951 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 952 continue; 953 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 954 osb->slot_num); 955 if (!inode[type]) { 956 status = -ENOENT; 957 goto out_quota_off; 958 } 959 status = dquot_enable(inode[type], type, QFMT_OCFS2, 960 DQUOT_USAGE_ENABLED); 961 if (status < 0) 962 goto out_quota_off; 963 } 964 965 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 966 iput(inode[type]); 967 return 0; 968 out_quota_off: 969 ocfs2_disable_quotas(osb); 970 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 971 iput(inode[type]); 972 mlog_errno(status); 973 return status; 974 } 975 976 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 977 { 978 int type; 979 struct inode *inode; 980 struct super_block *sb = osb->sb; 981 struct ocfs2_mem_dqinfo *oinfo; 982 983 /* We mostly ignore errors in this function because there's not much 984 * we can do when we see them */ 985 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 986 if (!sb_has_quota_loaded(sb, type)) 987 continue; 988 /* Cancel periodic syncing before we grab dqonoff_mutex */ 989 oinfo = sb_dqinfo(sb, type)->dqi_priv; 990 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 991 inode = igrab(sb->s_dquot.files[type]); 992 /* Turn off quotas. This will remove all dquot structures from 993 * memory and so they will be automatically synced to global 994 * quota files */ 995 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 996 DQUOT_LIMITS_ENABLED); 997 if (!inode) 998 continue; 999 iput(inode); 1000 } 1001 } 1002 1003 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1004 { 1005 struct dentry *root; 1006 int status, sector_size; 1007 struct mount_options parsed_options; 1008 struct inode *inode = NULL; 1009 struct ocfs2_super *osb = NULL; 1010 struct buffer_head *bh = NULL; 1011 char nodestr[12]; 1012 struct ocfs2_blockcheck_stats stats; 1013 1014 trace_ocfs2_fill_super(sb, data, silent); 1015 1016 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1017 status = -EINVAL; 1018 goto read_super_error; 1019 } 1020 1021 /* probe for superblock */ 1022 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1023 if (status < 0) { 1024 mlog(ML_ERROR, "superblock probe failed!\n"); 1025 goto read_super_error; 1026 } 1027 1028 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1029 osb = OCFS2_SB(sb); 1030 if (status < 0) { 1031 mlog_errno(status); 1032 goto read_super_error; 1033 } 1034 brelse(bh); 1035 bh = NULL; 1036 1037 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1038 status = -EINVAL; 1039 goto read_super_error; 1040 } 1041 osb->s_mount_opt = parsed_options.mount_opt; 1042 osb->s_atime_quantum = parsed_options.atime_quantum; 1043 osb->preferred_slot = parsed_options.slot; 1044 osb->osb_commit_interval = parsed_options.commit_interval; 1045 1046 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1047 osb->osb_resv_level = parsed_options.resv_level; 1048 osb->osb_dir_resv_level = parsed_options.resv_level; 1049 if (parsed_options.dir_resv_level == -1) 1050 osb->osb_dir_resv_level = parsed_options.resv_level; 1051 else 1052 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1053 1054 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1055 if (status) 1056 goto read_super_error; 1057 1058 sb->s_magic = OCFS2_SUPER_MAGIC; 1059 1060 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1061 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1062 1063 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1064 * heartbeat=none */ 1065 if (bdev_read_only(sb->s_bdev)) { 1066 if (!(sb->s_flags & MS_RDONLY)) { 1067 status = -EACCES; 1068 mlog(ML_ERROR, "Readonly device detected but readonly " 1069 "mount was not specified.\n"); 1070 goto read_super_error; 1071 } 1072 1073 /* You should not be able to start a local heartbeat 1074 * on a readonly device. */ 1075 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1076 status = -EROFS; 1077 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1078 "device.\n"); 1079 goto read_super_error; 1080 } 1081 1082 status = ocfs2_check_journals_nolocks(osb); 1083 if (status < 0) { 1084 if (status == -EROFS) 1085 mlog(ML_ERROR, "Recovery required on readonly " 1086 "file system, but write access is " 1087 "unavailable.\n"); 1088 else 1089 mlog_errno(status); 1090 goto read_super_error; 1091 } 1092 1093 ocfs2_set_ro_flag(osb, 1); 1094 1095 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1096 "Cluster services will not be used for this mount. " 1097 "Recovery will be skipped.\n", osb->dev_str); 1098 } 1099 1100 if (!ocfs2_is_hard_readonly(osb)) { 1101 if (sb->s_flags & MS_RDONLY) 1102 ocfs2_set_ro_flag(osb, 0); 1103 } 1104 1105 status = ocfs2_verify_heartbeat(osb); 1106 if (status < 0) { 1107 mlog_errno(status); 1108 goto read_super_error; 1109 } 1110 1111 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1112 ocfs2_debugfs_root); 1113 if (!osb->osb_debug_root) { 1114 status = -EINVAL; 1115 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1116 goto read_super_error; 1117 } 1118 1119 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1120 osb->osb_debug_root, 1121 osb, 1122 &ocfs2_osb_debug_fops); 1123 if (!osb->osb_ctxt) { 1124 status = -EINVAL; 1125 mlog_errno(status); 1126 goto read_super_error; 1127 } 1128 1129 if (ocfs2_meta_ecc(osb)) { 1130 status = ocfs2_blockcheck_stats_debugfs_install( 1131 &osb->osb_ecc_stats, 1132 osb->osb_debug_root); 1133 if (status) { 1134 mlog(ML_ERROR, 1135 "Unable to create blockcheck statistics " 1136 "files\n"); 1137 goto read_super_error; 1138 } 1139 } 1140 1141 status = ocfs2_mount_volume(sb); 1142 if (status < 0) 1143 goto read_super_error; 1144 1145 if (osb->root_inode) 1146 inode = igrab(osb->root_inode); 1147 1148 if (!inode) { 1149 status = -EIO; 1150 mlog_errno(status); 1151 goto read_super_error; 1152 } 1153 1154 root = d_make_root(inode); 1155 if (!root) { 1156 status = -ENOMEM; 1157 mlog_errno(status); 1158 goto read_super_error; 1159 } 1160 1161 sb->s_root = root; 1162 1163 ocfs2_complete_mount_recovery(osb); 1164 1165 if (ocfs2_mount_local(osb)) 1166 snprintf(nodestr, sizeof(nodestr), "local"); 1167 else 1168 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1169 1170 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1171 "with %s data mode.\n", 1172 osb->dev_str, nodestr, osb->slot_num, 1173 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1174 "ordered"); 1175 1176 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1177 wake_up(&osb->osb_mount_event); 1178 1179 /* Now we can initialize quotas because we can afford to wait 1180 * for cluster locks recovery now. That also means that truncation 1181 * log recovery can happen but that waits for proper quota setup */ 1182 if (!(sb->s_flags & MS_RDONLY)) { 1183 status = ocfs2_enable_quotas(osb); 1184 if (status < 0) { 1185 /* We have to err-out specially here because 1186 * s_root is already set */ 1187 mlog_errno(status); 1188 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1189 wake_up(&osb->osb_mount_event); 1190 return status; 1191 } 1192 } 1193 1194 ocfs2_complete_quota_recovery(osb); 1195 1196 /* Now we wake up again for processes waiting for quotas */ 1197 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1198 wake_up(&osb->osb_mount_event); 1199 1200 /* Start this when the mount is almost sure of being successful */ 1201 ocfs2_orphan_scan_start(osb); 1202 1203 /* Create filecheck sysfile /sys/fs/ocfs2/<devname>/filecheck */ 1204 ocfs2_filecheck_create_sysfs(sb); 1205 1206 return status; 1207 1208 read_super_error: 1209 brelse(bh); 1210 1211 if (osb) { 1212 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1213 wake_up(&osb->osb_mount_event); 1214 ocfs2_dismount_volume(sb, 1); 1215 } 1216 1217 if (status) 1218 mlog_errno(status); 1219 return status; 1220 } 1221 1222 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1223 int flags, 1224 const char *dev_name, 1225 void *data) 1226 { 1227 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1228 } 1229 1230 static struct file_system_type ocfs2_fs_type = { 1231 .owner = THIS_MODULE, 1232 .name = "ocfs2", 1233 .mount = ocfs2_mount, 1234 .kill_sb = kill_block_super, 1235 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1236 .next = NULL 1237 }; 1238 MODULE_ALIAS_FS("ocfs2"); 1239 1240 static int ocfs2_check_set_options(struct super_block *sb, 1241 struct mount_options *options) 1242 { 1243 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1244 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1245 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1246 mlog(ML_ERROR, "User quotas were requested, but this " 1247 "filesystem does not have the feature enabled.\n"); 1248 return 0; 1249 } 1250 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1251 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1252 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1253 mlog(ML_ERROR, "Group quotas were requested, but this " 1254 "filesystem does not have the feature enabled.\n"); 1255 return 0; 1256 } 1257 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1258 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1259 mlog(ML_ERROR, "ACL support requested but extended attributes " 1260 "feature is not enabled\n"); 1261 return 0; 1262 } 1263 /* No ACL setting specified? Use XATTR feature... */ 1264 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1265 OCFS2_MOUNT_NO_POSIX_ACL))) { 1266 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1267 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1268 else 1269 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1270 } 1271 return 1; 1272 } 1273 1274 static int ocfs2_parse_options(struct super_block *sb, 1275 char *options, 1276 struct mount_options *mopt, 1277 int is_remount) 1278 { 1279 int status, user_stack = 0; 1280 char *p; 1281 u32 tmp; 1282 int token, option; 1283 substring_t args[MAX_OPT_ARGS]; 1284 1285 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1286 1287 mopt->commit_interval = 0; 1288 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1289 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1290 mopt->slot = OCFS2_INVALID_SLOT; 1291 mopt->localalloc_opt = -1; 1292 mopt->cluster_stack[0] = '\0'; 1293 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1294 mopt->dir_resv_level = -1; 1295 1296 if (!options) { 1297 status = 1; 1298 goto bail; 1299 } 1300 1301 while ((p = strsep(&options, ",")) != NULL) { 1302 if (!*p) 1303 continue; 1304 1305 token = match_token(p, tokens, args); 1306 switch (token) { 1307 case Opt_hb_local: 1308 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1309 break; 1310 case Opt_hb_none: 1311 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1312 break; 1313 case Opt_hb_global: 1314 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1315 break; 1316 case Opt_barrier: 1317 if (match_int(&args[0], &option)) { 1318 status = 0; 1319 goto bail; 1320 } 1321 if (option) 1322 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1323 else 1324 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1325 break; 1326 case Opt_intr: 1327 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1328 break; 1329 case Opt_nointr: 1330 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1331 break; 1332 case Opt_err_panic: 1333 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1334 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1335 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1336 break; 1337 case Opt_err_ro: 1338 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1339 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1340 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1341 break; 1342 case Opt_err_cont: 1343 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1344 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1345 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1346 break; 1347 case Opt_data_ordered: 1348 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1349 break; 1350 case Opt_data_writeback: 1351 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1352 break; 1353 case Opt_user_xattr: 1354 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1355 break; 1356 case Opt_nouser_xattr: 1357 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1358 break; 1359 case Opt_atime_quantum: 1360 if (match_int(&args[0], &option)) { 1361 status = 0; 1362 goto bail; 1363 } 1364 if (option >= 0) 1365 mopt->atime_quantum = option; 1366 break; 1367 case Opt_slot: 1368 if (match_int(&args[0], &option)) { 1369 status = 0; 1370 goto bail; 1371 } 1372 if (option) 1373 mopt->slot = (s16)option; 1374 break; 1375 case Opt_commit: 1376 if (match_int(&args[0], &option)) { 1377 status = 0; 1378 goto bail; 1379 } 1380 if (option < 0) 1381 return 0; 1382 if (option == 0) 1383 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1384 mopt->commit_interval = HZ * option; 1385 break; 1386 case Opt_localalloc: 1387 if (match_int(&args[0], &option)) { 1388 status = 0; 1389 goto bail; 1390 } 1391 if (option >= 0) 1392 mopt->localalloc_opt = option; 1393 break; 1394 case Opt_localflocks: 1395 /* 1396 * Changing this during remount could race 1397 * flock() requests, or "unbalance" existing 1398 * ones (e.g., a lock is taken in one mode but 1399 * dropped in the other). If users care enough 1400 * to flip locking modes during remount, we 1401 * could add a "local" flag to individual 1402 * flock structures for proper tracking of 1403 * state. 1404 */ 1405 if (!is_remount) 1406 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1407 break; 1408 case Opt_stack: 1409 /* Check both that the option we were passed 1410 * is of the right length and that it is a proper 1411 * string of the right length. 1412 */ 1413 if (((args[0].to - args[0].from) != 1414 OCFS2_STACK_LABEL_LEN) || 1415 (strnlen(args[0].from, 1416 OCFS2_STACK_LABEL_LEN) != 1417 OCFS2_STACK_LABEL_LEN)) { 1418 mlog(ML_ERROR, 1419 "Invalid cluster_stack option\n"); 1420 status = 0; 1421 goto bail; 1422 } 1423 memcpy(mopt->cluster_stack, args[0].from, 1424 OCFS2_STACK_LABEL_LEN); 1425 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1426 /* 1427 * Open code the memcmp here as we don't have 1428 * an osb to pass to 1429 * ocfs2_userspace_stack(). 1430 */ 1431 if (memcmp(mopt->cluster_stack, 1432 OCFS2_CLASSIC_CLUSTER_STACK, 1433 OCFS2_STACK_LABEL_LEN)) 1434 user_stack = 1; 1435 break; 1436 case Opt_inode64: 1437 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1438 break; 1439 case Opt_usrquota: 1440 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1441 break; 1442 case Opt_grpquota: 1443 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1444 break; 1445 case Opt_coherency_buffered: 1446 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1447 break; 1448 case Opt_coherency_full: 1449 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1450 break; 1451 case Opt_acl: 1452 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1453 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1454 break; 1455 case Opt_noacl: 1456 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1457 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1458 break; 1459 case Opt_resv_level: 1460 if (is_remount) 1461 break; 1462 if (match_int(&args[0], &option)) { 1463 status = 0; 1464 goto bail; 1465 } 1466 if (option >= OCFS2_MIN_RESV_LEVEL && 1467 option < OCFS2_MAX_RESV_LEVEL) 1468 mopt->resv_level = option; 1469 break; 1470 case Opt_dir_resv_level: 1471 if (is_remount) 1472 break; 1473 if (match_int(&args[0], &option)) { 1474 status = 0; 1475 goto bail; 1476 } 1477 if (option >= OCFS2_MIN_RESV_LEVEL && 1478 option < OCFS2_MAX_RESV_LEVEL) 1479 mopt->dir_resv_level = option; 1480 break; 1481 case Opt_journal_async_commit: 1482 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1483 break; 1484 default: 1485 mlog(ML_ERROR, 1486 "Unrecognized mount option \"%s\" " 1487 "or missing value\n", p); 1488 status = 0; 1489 goto bail; 1490 } 1491 } 1492 1493 if (user_stack == 0) { 1494 /* Ensure only one heartbeat mode */ 1495 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1496 OCFS2_MOUNT_HB_GLOBAL | 1497 OCFS2_MOUNT_HB_NONE); 1498 if (hweight32(tmp) != 1) { 1499 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1500 status = 0; 1501 goto bail; 1502 } 1503 } 1504 1505 status = 1; 1506 1507 bail: 1508 return status; 1509 } 1510 1511 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1512 { 1513 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1514 unsigned long opts = osb->s_mount_opt; 1515 unsigned int local_alloc_megs; 1516 1517 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1518 seq_printf(s, ",_netdev"); 1519 if (opts & OCFS2_MOUNT_HB_LOCAL) 1520 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1521 else 1522 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1523 } else 1524 seq_printf(s, ",%s", OCFS2_HB_NONE); 1525 1526 if (opts & OCFS2_MOUNT_NOINTR) 1527 seq_printf(s, ",nointr"); 1528 1529 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1530 seq_printf(s, ",data=writeback"); 1531 else 1532 seq_printf(s, ",data=ordered"); 1533 1534 if (opts & OCFS2_MOUNT_BARRIER) 1535 seq_printf(s, ",barrier=1"); 1536 1537 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1538 seq_printf(s, ",errors=panic"); 1539 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1540 seq_printf(s, ",errors=continue"); 1541 else 1542 seq_printf(s, ",errors=remount-ro"); 1543 1544 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1545 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1546 1547 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1548 1549 if (osb->osb_commit_interval) 1550 seq_printf(s, ",commit=%u", 1551 (unsigned) (osb->osb_commit_interval / HZ)); 1552 1553 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1554 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1555 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1556 1557 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1558 seq_printf(s, ",localflocks,"); 1559 1560 if (osb->osb_cluster_stack[0]) 1561 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1562 OCFS2_STACK_LABEL_LEN); 1563 if (opts & OCFS2_MOUNT_USRQUOTA) 1564 seq_printf(s, ",usrquota"); 1565 if (opts & OCFS2_MOUNT_GRPQUOTA) 1566 seq_printf(s, ",grpquota"); 1567 1568 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1569 seq_printf(s, ",coherency=buffered"); 1570 else 1571 seq_printf(s, ",coherency=full"); 1572 1573 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1574 seq_printf(s, ",nouser_xattr"); 1575 else 1576 seq_printf(s, ",user_xattr"); 1577 1578 if (opts & OCFS2_MOUNT_INODE64) 1579 seq_printf(s, ",inode64"); 1580 1581 if (opts & OCFS2_MOUNT_POSIX_ACL) 1582 seq_printf(s, ",acl"); 1583 else 1584 seq_printf(s, ",noacl"); 1585 1586 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1587 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1588 1589 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1590 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1591 1592 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1593 seq_printf(s, ",journal_async_commit"); 1594 1595 return 0; 1596 } 1597 1598 static int __init ocfs2_init(void) 1599 { 1600 int status; 1601 1602 status = init_ocfs2_uptodate_cache(); 1603 if (status < 0) 1604 goto out1; 1605 1606 status = ocfs2_initialize_mem_caches(); 1607 if (status < 0) 1608 goto out2; 1609 1610 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1611 if (!ocfs2_debugfs_root) { 1612 status = -ENOMEM; 1613 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1614 goto out3; 1615 } 1616 1617 ocfs2_set_locking_protocol(); 1618 1619 status = register_quota_format(&ocfs2_quota_format); 1620 if (status < 0) 1621 goto out3; 1622 status = register_filesystem(&ocfs2_fs_type); 1623 if (!status) 1624 return 0; 1625 1626 unregister_quota_format(&ocfs2_quota_format); 1627 out3: 1628 debugfs_remove(ocfs2_debugfs_root); 1629 ocfs2_free_mem_caches(); 1630 out2: 1631 exit_ocfs2_uptodate_cache(); 1632 out1: 1633 mlog_errno(status); 1634 return status; 1635 } 1636 1637 static void __exit ocfs2_exit(void) 1638 { 1639 unregister_quota_format(&ocfs2_quota_format); 1640 1641 debugfs_remove(ocfs2_debugfs_root); 1642 1643 ocfs2_free_mem_caches(); 1644 1645 unregister_filesystem(&ocfs2_fs_type); 1646 1647 exit_ocfs2_uptodate_cache(); 1648 } 1649 1650 static void ocfs2_put_super(struct super_block *sb) 1651 { 1652 trace_ocfs2_put_super(sb); 1653 1654 ocfs2_sync_blockdev(sb); 1655 ocfs2_dismount_volume(sb, 0); 1656 ocfs2_filecheck_remove_sysfs(sb); 1657 } 1658 1659 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1660 { 1661 struct ocfs2_super *osb; 1662 u32 numbits, freebits; 1663 int status; 1664 struct ocfs2_dinode *bm_lock; 1665 struct buffer_head *bh = NULL; 1666 struct inode *inode = NULL; 1667 1668 trace_ocfs2_statfs(dentry->d_sb, buf); 1669 1670 osb = OCFS2_SB(dentry->d_sb); 1671 1672 inode = ocfs2_get_system_file_inode(osb, 1673 GLOBAL_BITMAP_SYSTEM_INODE, 1674 OCFS2_INVALID_SLOT); 1675 if (!inode) { 1676 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1677 status = -EIO; 1678 goto bail; 1679 } 1680 1681 status = ocfs2_inode_lock(inode, &bh, 0); 1682 if (status < 0) { 1683 mlog_errno(status); 1684 goto bail; 1685 } 1686 1687 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1688 1689 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1690 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1691 1692 buf->f_type = OCFS2_SUPER_MAGIC; 1693 buf->f_bsize = dentry->d_sb->s_blocksize; 1694 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1695 buf->f_blocks = ((sector_t) numbits) * 1696 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1697 buf->f_bfree = ((sector_t) freebits) * 1698 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1699 buf->f_bavail = buf->f_bfree; 1700 buf->f_files = numbits; 1701 buf->f_ffree = freebits; 1702 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1703 & 0xFFFFFFFFUL; 1704 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1705 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1706 1707 brelse(bh); 1708 1709 ocfs2_inode_unlock(inode, 0); 1710 status = 0; 1711 bail: 1712 iput(inode); 1713 1714 if (status) 1715 mlog_errno(status); 1716 1717 return status; 1718 } 1719 1720 static void ocfs2_inode_init_once(void *data) 1721 { 1722 struct ocfs2_inode_info *oi = data; 1723 1724 oi->ip_flags = 0; 1725 oi->ip_open_count = 0; 1726 spin_lock_init(&oi->ip_lock); 1727 ocfs2_extent_map_init(&oi->vfs_inode); 1728 INIT_LIST_HEAD(&oi->ip_io_markers); 1729 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1730 oi->ip_dir_start_lookup = 0; 1731 init_rwsem(&oi->ip_alloc_sem); 1732 init_rwsem(&oi->ip_xattr_sem); 1733 mutex_init(&oi->ip_io_mutex); 1734 1735 oi->ip_blkno = 0ULL; 1736 oi->ip_clusters = 0; 1737 1738 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1739 1740 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1741 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1742 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1743 1744 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1745 &ocfs2_inode_caching_ops); 1746 1747 inode_init_once(&oi->vfs_inode); 1748 } 1749 1750 static int ocfs2_initialize_mem_caches(void) 1751 { 1752 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1753 sizeof(struct ocfs2_inode_info), 1754 0, 1755 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1756 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1757 ocfs2_inode_init_once); 1758 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1759 sizeof(struct ocfs2_dquot), 1760 0, 1761 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1762 SLAB_MEM_SPREAD), 1763 NULL); 1764 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1765 sizeof(struct ocfs2_quota_chunk), 1766 0, 1767 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1768 NULL); 1769 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1770 !ocfs2_qf_chunk_cachep) { 1771 if (ocfs2_inode_cachep) 1772 kmem_cache_destroy(ocfs2_inode_cachep); 1773 if (ocfs2_dquot_cachep) 1774 kmem_cache_destroy(ocfs2_dquot_cachep); 1775 if (ocfs2_qf_chunk_cachep) 1776 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1777 return -ENOMEM; 1778 } 1779 1780 return 0; 1781 } 1782 1783 static void ocfs2_free_mem_caches(void) 1784 { 1785 /* 1786 * Make sure all delayed rcu free inodes are flushed before we 1787 * destroy cache. 1788 */ 1789 rcu_barrier(); 1790 if (ocfs2_inode_cachep) 1791 kmem_cache_destroy(ocfs2_inode_cachep); 1792 ocfs2_inode_cachep = NULL; 1793 1794 if (ocfs2_dquot_cachep) 1795 kmem_cache_destroy(ocfs2_dquot_cachep); 1796 ocfs2_dquot_cachep = NULL; 1797 1798 if (ocfs2_qf_chunk_cachep) 1799 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1800 ocfs2_qf_chunk_cachep = NULL; 1801 } 1802 1803 static int ocfs2_get_sector(struct super_block *sb, 1804 struct buffer_head **bh, 1805 int block, 1806 int sect_size) 1807 { 1808 if (!sb_set_blocksize(sb, sect_size)) { 1809 mlog(ML_ERROR, "unable to set blocksize\n"); 1810 return -EIO; 1811 } 1812 1813 *bh = sb_getblk(sb, block); 1814 if (!*bh) { 1815 mlog_errno(-ENOMEM); 1816 return -ENOMEM; 1817 } 1818 lock_buffer(*bh); 1819 if (!buffer_dirty(*bh)) 1820 clear_buffer_uptodate(*bh); 1821 unlock_buffer(*bh); 1822 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1823 wait_on_buffer(*bh); 1824 if (!buffer_uptodate(*bh)) { 1825 mlog_errno(-EIO); 1826 brelse(*bh); 1827 *bh = NULL; 1828 return -EIO; 1829 } 1830 1831 return 0; 1832 } 1833 1834 static int ocfs2_mount_volume(struct super_block *sb) 1835 { 1836 int status = 0; 1837 int unlock_super = 0; 1838 struct ocfs2_super *osb = OCFS2_SB(sb); 1839 1840 if (ocfs2_is_hard_readonly(osb)) 1841 goto leave; 1842 1843 status = ocfs2_dlm_init(osb); 1844 if (status < 0) { 1845 mlog_errno(status); 1846 goto leave; 1847 } 1848 1849 status = ocfs2_super_lock(osb, 1); 1850 if (status < 0) { 1851 mlog_errno(status); 1852 goto leave; 1853 } 1854 unlock_super = 1; 1855 1856 /* This will load up the node map and add ourselves to it. */ 1857 status = ocfs2_find_slot(osb); 1858 if (status < 0) { 1859 mlog_errno(status); 1860 goto leave; 1861 } 1862 1863 /* load all node-local system inodes */ 1864 status = ocfs2_init_local_system_inodes(osb); 1865 if (status < 0) { 1866 mlog_errno(status); 1867 goto leave; 1868 } 1869 1870 status = ocfs2_check_volume(osb); 1871 if (status < 0) { 1872 mlog_errno(status); 1873 goto leave; 1874 } 1875 1876 status = ocfs2_truncate_log_init(osb); 1877 if (status < 0) 1878 mlog_errno(status); 1879 1880 leave: 1881 if (unlock_super) 1882 ocfs2_super_unlock(osb, 1); 1883 1884 return status; 1885 } 1886 1887 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1888 { 1889 int tmp, hangup_needed = 0; 1890 struct ocfs2_super *osb = NULL; 1891 char nodestr[12]; 1892 1893 trace_ocfs2_dismount_volume(sb); 1894 1895 BUG_ON(!sb); 1896 osb = OCFS2_SB(sb); 1897 BUG_ON(!osb); 1898 1899 debugfs_remove(osb->osb_ctxt); 1900 1901 /* Orphan scan should be stopped as early as possible */ 1902 ocfs2_orphan_scan_stop(osb); 1903 1904 ocfs2_disable_quotas(osb); 1905 1906 /* All dquots should be freed by now */ 1907 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1908 /* Wait for worker to be done with the work structure in osb */ 1909 cancel_work_sync(&osb->dquot_drop_work); 1910 1911 ocfs2_shutdown_local_alloc(osb); 1912 1913 ocfs2_truncate_log_shutdown(osb); 1914 1915 /* This will disable recovery and flush any recovery work. */ 1916 ocfs2_recovery_exit(osb); 1917 1918 ocfs2_journal_shutdown(osb); 1919 1920 ocfs2_sync_blockdev(sb); 1921 1922 ocfs2_purge_refcount_trees(osb); 1923 1924 /* No cluster connection means we've failed during mount, so skip 1925 * all the steps which depended on that to complete. */ 1926 if (osb->cconn) { 1927 tmp = ocfs2_super_lock(osb, 1); 1928 if (tmp < 0) { 1929 mlog_errno(tmp); 1930 return; 1931 } 1932 } 1933 1934 if (osb->slot_num != OCFS2_INVALID_SLOT) 1935 ocfs2_put_slot(osb); 1936 1937 if (osb->cconn) 1938 ocfs2_super_unlock(osb, 1); 1939 1940 ocfs2_release_system_inodes(osb); 1941 1942 /* 1943 * If we're dismounting due to mount error, mount.ocfs2 will clean 1944 * up heartbeat. If we're a local mount, there is no heartbeat. 1945 * If we failed before we got a uuid_str yet, we can't stop 1946 * heartbeat. Otherwise, do it. 1947 */ 1948 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1949 !ocfs2_is_hard_readonly(osb)) 1950 hangup_needed = 1; 1951 1952 if (osb->cconn) 1953 ocfs2_dlm_shutdown(osb, hangup_needed); 1954 1955 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1956 debugfs_remove(osb->osb_debug_root); 1957 1958 if (hangup_needed) 1959 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1960 1961 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1962 1963 if (ocfs2_mount_local(osb)) 1964 snprintf(nodestr, sizeof(nodestr), "local"); 1965 else 1966 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1967 1968 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1969 osb->dev_str, nodestr); 1970 1971 ocfs2_delete_osb(osb); 1972 kfree(osb); 1973 sb->s_dev = 0; 1974 sb->s_fs_info = NULL; 1975 } 1976 1977 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1978 unsigned uuid_bytes) 1979 { 1980 int i, ret; 1981 char *ptr; 1982 1983 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1984 1985 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1986 if (osb->uuid_str == NULL) 1987 return -ENOMEM; 1988 1989 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1990 /* print with null */ 1991 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1992 if (ret != 2) /* drop super cleans up */ 1993 return -EINVAL; 1994 /* then only advance past the last char */ 1995 ptr += 2; 1996 } 1997 1998 return 0; 1999 } 2000 2001 /* Make sure entire volume is addressable by our journal. Requires 2002 osb_clusters_at_boot to be valid and for the journal to have been 2003 initialized by ocfs2_journal_init(). */ 2004 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2005 { 2006 int status = 0; 2007 u64 max_block = 2008 ocfs2_clusters_to_blocks(osb->sb, 2009 osb->osb_clusters_at_boot) - 1; 2010 2011 /* 32-bit block number is always OK. */ 2012 if (max_block <= (u32)~0ULL) 2013 goto out; 2014 2015 /* Volume is "huge", so see if our journal is new enough to 2016 support it. */ 2017 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2018 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2019 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2020 JBD2_FEATURE_INCOMPAT_64BIT))) { 2021 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2022 "Enable the 'block64' journal option with tunefs.ocfs2"); 2023 status = -EFBIG; 2024 goto out; 2025 } 2026 2027 out: 2028 return status; 2029 } 2030 2031 static int ocfs2_initialize_super(struct super_block *sb, 2032 struct buffer_head *bh, 2033 int sector_size, 2034 struct ocfs2_blockcheck_stats *stats) 2035 { 2036 int status; 2037 int i, cbits, bbits; 2038 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2039 struct inode *inode = NULL; 2040 struct ocfs2_journal *journal; 2041 struct ocfs2_super *osb; 2042 u64 total_blocks; 2043 2044 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2045 if (!osb) { 2046 status = -ENOMEM; 2047 mlog_errno(status); 2048 goto bail; 2049 } 2050 2051 sb->s_fs_info = osb; 2052 sb->s_op = &ocfs2_sops; 2053 sb->s_d_op = &ocfs2_dentry_ops; 2054 sb->s_export_op = &ocfs2_export_ops; 2055 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2056 sb->dq_op = &ocfs2_quota_operations; 2057 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2058 sb->s_xattr = ocfs2_xattr_handlers; 2059 sb->s_time_gran = 1; 2060 sb->s_flags |= MS_NOATIME; 2061 /* this is needed to support O_LARGEFILE */ 2062 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2063 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2064 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2065 memcpy(sb->s_uuid, di->id2.i_super.s_uuid, 2066 sizeof(di->id2.i_super.s_uuid)); 2067 2068 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2069 2070 for (i = 0; i < 3; i++) 2071 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2072 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2073 2074 osb->sb = sb; 2075 osb->s_sectsize_bits = blksize_bits(sector_size); 2076 BUG_ON(!osb->s_sectsize_bits); 2077 2078 spin_lock_init(&osb->dc_task_lock); 2079 init_waitqueue_head(&osb->dc_event); 2080 osb->dc_work_sequence = 0; 2081 osb->dc_wake_sequence = 0; 2082 INIT_LIST_HEAD(&osb->blocked_lock_list); 2083 osb->blocked_lock_count = 0; 2084 spin_lock_init(&osb->osb_lock); 2085 spin_lock_init(&osb->osb_xattr_lock); 2086 ocfs2_init_steal_slots(osb); 2087 2088 mutex_init(&osb->system_file_mutex); 2089 2090 atomic_set(&osb->alloc_stats.moves, 0); 2091 atomic_set(&osb->alloc_stats.local_data, 0); 2092 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2093 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2094 atomic_set(&osb->alloc_stats.bg_extends, 0); 2095 2096 /* Copy the blockcheck stats from the superblock probe */ 2097 osb->osb_ecc_stats = *stats; 2098 2099 ocfs2_init_node_maps(osb); 2100 2101 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2102 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2103 2104 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2105 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2106 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2107 osb->max_slots); 2108 status = -EINVAL; 2109 goto bail; 2110 } 2111 2112 ocfs2_orphan_scan_init(osb); 2113 2114 status = ocfs2_recovery_init(osb); 2115 if (status) { 2116 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2117 mlog_errno(status); 2118 goto bail; 2119 } 2120 2121 init_waitqueue_head(&osb->checkpoint_event); 2122 2123 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2124 2125 osb->slot_num = OCFS2_INVALID_SLOT; 2126 2127 osb->s_xattr_inline_size = le16_to_cpu( 2128 di->id2.i_super.s_xattr_inline_size); 2129 2130 osb->local_alloc_state = OCFS2_LA_UNUSED; 2131 osb->local_alloc_bh = NULL; 2132 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2133 2134 init_waitqueue_head(&osb->osb_mount_event); 2135 2136 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2137 if (status) { 2138 mlog_errno(status); 2139 goto bail; 2140 } 2141 2142 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2143 if (!osb->vol_label) { 2144 mlog(ML_ERROR, "unable to alloc vol label\n"); 2145 status = -ENOMEM; 2146 goto bail; 2147 } 2148 2149 osb->slot_recovery_generations = 2150 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2151 GFP_KERNEL); 2152 if (!osb->slot_recovery_generations) { 2153 status = -ENOMEM; 2154 mlog_errno(status); 2155 goto bail; 2156 } 2157 2158 init_waitqueue_head(&osb->osb_wipe_event); 2159 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2160 sizeof(*osb->osb_orphan_wipes), 2161 GFP_KERNEL); 2162 if (!osb->osb_orphan_wipes) { 2163 status = -ENOMEM; 2164 mlog_errno(status); 2165 goto bail; 2166 } 2167 2168 osb->osb_rf_lock_tree = RB_ROOT; 2169 2170 osb->s_feature_compat = 2171 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2172 osb->s_feature_ro_compat = 2173 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2174 osb->s_feature_incompat = 2175 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2176 2177 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2178 mlog(ML_ERROR, "couldn't mount because of unsupported " 2179 "optional features (%x).\n", i); 2180 status = -EINVAL; 2181 goto bail; 2182 } 2183 if (!(osb->sb->s_flags & MS_RDONLY) && 2184 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2185 mlog(ML_ERROR, "couldn't mount RDWR because of " 2186 "unsupported optional features (%x).\n", i); 2187 status = -EINVAL; 2188 goto bail; 2189 } 2190 2191 if (ocfs2_clusterinfo_valid(osb)) { 2192 osb->osb_stackflags = 2193 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2194 strlcpy(osb->osb_cluster_stack, 2195 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2196 OCFS2_STACK_LABEL_LEN + 1); 2197 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2198 mlog(ML_ERROR, 2199 "couldn't mount because of an invalid " 2200 "cluster stack label (%s) \n", 2201 osb->osb_cluster_stack); 2202 status = -EINVAL; 2203 goto bail; 2204 } 2205 strlcpy(osb->osb_cluster_name, 2206 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2207 OCFS2_CLUSTER_NAME_LEN + 1); 2208 } else { 2209 /* The empty string is identical with classic tools that 2210 * don't know about s_cluster_info. */ 2211 osb->osb_cluster_stack[0] = '\0'; 2212 } 2213 2214 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2215 2216 /* FIXME 2217 * This should be done in ocfs2_journal_init(), but unknown 2218 * ordering issues will cause the filesystem to crash. 2219 * If anyone wants to figure out what part of the code 2220 * refers to osb->journal before ocfs2_journal_init() is run, 2221 * be my guest. 2222 */ 2223 /* initialize our journal structure */ 2224 2225 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2226 if (!journal) { 2227 mlog(ML_ERROR, "unable to alloc journal\n"); 2228 status = -ENOMEM; 2229 goto bail; 2230 } 2231 osb->journal = journal; 2232 journal->j_osb = osb; 2233 2234 atomic_set(&journal->j_num_trans, 0); 2235 init_rwsem(&journal->j_trans_barrier); 2236 init_waitqueue_head(&journal->j_checkpointed); 2237 spin_lock_init(&journal->j_lock); 2238 journal->j_trans_id = (unsigned long) 1; 2239 INIT_LIST_HEAD(&journal->j_la_cleanups); 2240 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2241 journal->j_state = OCFS2_JOURNAL_FREE; 2242 2243 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2244 init_llist_head(&osb->dquot_drop_list); 2245 2246 /* get some pseudo constants for clustersize bits */ 2247 osb->s_clustersize_bits = 2248 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2249 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2250 2251 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2252 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2253 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2254 osb->s_clustersize); 2255 status = -EINVAL; 2256 goto bail; 2257 } 2258 2259 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2260 le32_to_cpu(di->i_clusters)); 2261 2262 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2263 total_blocks); 2264 if (status) { 2265 mlog(ML_ERROR, "Volume too large " 2266 "to mount safely on this system"); 2267 status = -EFBIG; 2268 goto bail; 2269 } 2270 2271 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2272 sizeof(di->id2.i_super.s_uuid))) { 2273 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2274 status = -ENOMEM; 2275 goto bail; 2276 } 2277 2278 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2279 OCFS2_MAX_VOL_LABEL_LEN); 2280 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2281 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2282 osb->first_cluster_group_blkno = 2283 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2284 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2285 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2286 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2287 (unsigned long long)osb->root_blkno, 2288 (unsigned long long)osb->system_dir_blkno, 2289 osb->s_clustersize_bits); 2290 2291 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2292 if (!osb->osb_dlm_debug) { 2293 status = -ENOMEM; 2294 mlog_errno(status); 2295 goto bail; 2296 } 2297 2298 atomic_set(&osb->vol_state, VOLUME_INIT); 2299 2300 /* load root, system_dir, and all global system inodes */ 2301 status = ocfs2_init_global_system_inodes(osb); 2302 if (status < 0) { 2303 mlog_errno(status); 2304 goto bail; 2305 } 2306 2307 /* 2308 * global bitmap 2309 */ 2310 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2311 OCFS2_INVALID_SLOT); 2312 if (!inode) { 2313 status = -EINVAL; 2314 mlog_errno(status); 2315 goto bail; 2316 } 2317 2318 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2319 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2320 iput(inode); 2321 2322 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2323 osb->s_feature_incompat) * 8; 2324 2325 status = ocfs2_init_slot_info(osb); 2326 if (status < 0) { 2327 mlog_errno(status); 2328 goto bail; 2329 } 2330 cleancache_init_shared_fs(sb); 2331 2332 osb->ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 2333 if (!osb->ocfs2_wq) { 2334 status = -ENOMEM; 2335 mlog_errno(status); 2336 } 2337 2338 bail: 2339 return status; 2340 } 2341 2342 /* 2343 * will return: -EAGAIN if it is ok to keep searching for superblocks 2344 * -EINVAL if there is a bad superblock 2345 * 0 on success 2346 */ 2347 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2348 struct buffer_head *bh, 2349 u32 blksz, 2350 struct ocfs2_blockcheck_stats *stats) 2351 { 2352 int status = -EAGAIN; 2353 2354 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2355 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2356 /* We have to do a raw check of the feature here */ 2357 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2358 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2359 status = ocfs2_block_check_validate(bh->b_data, 2360 bh->b_size, 2361 &di->i_check, 2362 stats); 2363 if (status) 2364 goto out; 2365 } 2366 status = -EINVAL; 2367 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2368 mlog(ML_ERROR, "found superblock with incorrect block " 2369 "size: found %u, should be %u\n", 2370 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2371 blksz); 2372 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2373 OCFS2_MAJOR_REV_LEVEL || 2374 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2375 OCFS2_MINOR_REV_LEVEL) { 2376 mlog(ML_ERROR, "found superblock with bad version: " 2377 "found %u.%u, should be %u.%u\n", 2378 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2379 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2380 OCFS2_MAJOR_REV_LEVEL, 2381 OCFS2_MINOR_REV_LEVEL); 2382 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2383 mlog(ML_ERROR, "bad block number on superblock: " 2384 "found %llu, should be %llu\n", 2385 (unsigned long long)le64_to_cpu(di->i_blkno), 2386 (unsigned long long)bh->b_blocknr); 2387 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2388 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2389 mlog(ML_ERROR, "bad cluster size found: %u\n", 2390 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2391 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2392 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2393 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2394 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2395 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2396 mlog(ML_ERROR, 2397 "Superblock slots found greater than file system " 2398 "maximum: found %u, max %u\n", 2399 le16_to_cpu(di->id2.i_super.s_max_slots), 2400 OCFS2_MAX_SLOTS); 2401 } else { 2402 /* found it! */ 2403 status = 0; 2404 } 2405 } 2406 2407 out: 2408 if (status && status != -EAGAIN) 2409 mlog_errno(status); 2410 return status; 2411 } 2412 2413 static int ocfs2_check_volume(struct ocfs2_super *osb) 2414 { 2415 int status; 2416 int dirty; 2417 int local; 2418 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2419 * recover 2420 * ourselves. */ 2421 2422 /* Init our journal object. */ 2423 status = ocfs2_journal_init(osb->journal, &dirty); 2424 if (status < 0) { 2425 mlog(ML_ERROR, "Could not initialize journal!\n"); 2426 goto finally; 2427 } 2428 2429 /* Now that journal has been initialized, check to make sure 2430 entire volume is addressable. */ 2431 status = ocfs2_journal_addressable(osb); 2432 if (status) 2433 goto finally; 2434 2435 /* If the journal was unmounted cleanly then we don't want to 2436 * recover anything. Otherwise, journal_load will do that 2437 * dirty work for us :) */ 2438 if (!dirty) { 2439 status = ocfs2_journal_wipe(osb->journal, 0); 2440 if (status < 0) { 2441 mlog_errno(status); 2442 goto finally; 2443 } 2444 } else { 2445 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2446 "unmounted cleanly, recovering it.\n", osb->dev_str); 2447 } 2448 2449 local = ocfs2_mount_local(osb); 2450 2451 /* will play back anything left in the journal. */ 2452 status = ocfs2_journal_load(osb->journal, local, dirty); 2453 if (status < 0) { 2454 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2455 goto finally; 2456 } 2457 2458 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2459 jbd2_journal_set_features(osb->journal->j_journal, 2460 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2461 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2462 else 2463 jbd2_journal_clear_features(osb->journal->j_journal, 2464 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2465 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2466 2467 if (dirty) { 2468 /* recover my local alloc if we didn't unmount cleanly. */ 2469 status = ocfs2_begin_local_alloc_recovery(osb, 2470 osb->slot_num, 2471 &local_alloc); 2472 if (status < 0) { 2473 mlog_errno(status); 2474 goto finally; 2475 } 2476 /* we complete the recovery process after we've marked 2477 * ourselves as mounted. */ 2478 } 2479 2480 status = ocfs2_load_local_alloc(osb); 2481 if (status < 0) { 2482 mlog_errno(status); 2483 goto finally; 2484 } 2485 2486 if (dirty) { 2487 /* Recovery will be completed after we've mounted the 2488 * rest of the volume. */ 2489 osb->dirty = 1; 2490 osb->local_alloc_copy = local_alloc; 2491 local_alloc = NULL; 2492 } 2493 2494 /* go through each journal, trylock it and if you get the 2495 * lock, and it's marked as dirty, set the bit in the recover 2496 * map and launch a recovery thread for it. */ 2497 status = ocfs2_mark_dead_nodes(osb); 2498 if (status < 0) { 2499 mlog_errno(status); 2500 goto finally; 2501 } 2502 2503 status = ocfs2_compute_replay_slots(osb); 2504 if (status < 0) 2505 mlog_errno(status); 2506 2507 finally: 2508 kfree(local_alloc); 2509 2510 if (status) 2511 mlog_errno(status); 2512 return status; 2513 } 2514 2515 /* 2516 * The routine gets called from dismount or close whenever a dismount on 2517 * volume is requested and the osb open count becomes 1. 2518 * It will remove the osb from the global list and also free up all the 2519 * initialized resources and fileobject. 2520 */ 2521 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2522 { 2523 /* This function assumes that the caller has the main osb resource */ 2524 2525 /* ocfs2_initializer_super have already created this workqueue */ 2526 if (osb->ocfs2_wq) { 2527 flush_workqueue(osb->ocfs2_wq); 2528 destroy_workqueue(osb->ocfs2_wq); 2529 } 2530 2531 ocfs2_free_slot_info(osb); 2532 2533 kfree(osb->osb_orphan_wipes); 2534 kfree(osb->slot_recovery_generations); 2535 /* FIXME 2536 * This belongs in journal shutdown, but because we have to 2537 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2538 * we free it here. 2539 */ 2540 kfree(osb->journal); 2541 kfree(osb->local_alloc_copy); 2542 kfree(osb->uuid_str); 2543 kfree(osb->vol_label); 2544 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2545 memset(osb, 0, sizeof(struct ocfs2_super)); 2546 } 2547 2548 /* Depending on the mount option passed, perform one of the following: 2549 * Put OCFS2 into a readonly state (default) 2550 * Return EIO so that only the process errs 2551 * Fix the error as if fsck.ocfs2 -y 2552 * panic 2553 */ 2554 static int ocfs2_handle_error(struct super_block *sb) 2555 { 2556 struct ocfs2_super *osb = OCFS2_SB(sb); 2557 int rv = 0; 2558 2559 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2560 pr_crit("On-disk corruption discovered. " 2561 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2562 2563 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2564 panic("OCFS2: (device %s): panic forced after error\n", 2565 sb->s_id); 2566 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2567 pr_crit("OCFS2: Returning error to the calling process.\n"); 2568 rv = -EIO; 2569 } else { /* default option */ 2570 rv = -EROFS; 2571 if (sb->s_flags & MS_RDONLY && 2572 (ocfs2_is_soft_readonly(osb) || 2573 ocfs2_is_hard_readonly(osb))) 2574 return rv; 2575 2576 pr_crit("OCFS2: File system is now read-only.\n"); 2577 sb->s_flags |= MS_RDONLY; 2578 ocfs2_set_ro_flag(osb, 0); 2579 } 2580 2581 return rv; 2582 } 2583 2584 int __ocfs2_error(struct super_block *sb, const char *function, 2585 const char *fmt, ...) 2586 { 2587 struct va_format vaf; 2588 va_list args; 2589 2590 va_start(args, fmt); 2591 vaf.fmt = fmt; 2592 vaf.va = &args; 2593 2594 /* Not using mlog here because we want to show the actual 2595 * function the error came from. */ 2596 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2597 sb->s_id, function, &vaf); 2598 2599 va_end(args); 2600 2601 return ocfs2_handle_error(sb); 2602 } 2603 2604 /* Handle critical errors. This is intentionally more drastic than 2605 * ocfs2_handle_error, so we only use for things like journal errors, 2606 * etc. */ 2607 void __ocfs2_abort(struct super_block *sb, const char *function, 2608 const char *fmt, ...) 2609 { 2610 struct va_format vaf; 2611 va_list args; 2612 2613 va_start(args, fmt); 2614 2615 vaf.fmt = fmt; 2616 vaf.va = &args; 2617 2618 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2619 sb->s_id, function, &vaf); 2620 2621 va_end(args); 2622 2623 /* We don't have the cluster support yet to go straight to 2624 * hard readonly in here. Until then, we want to keep 2625 * ocfs2_abort() so that we can at least mark critical 2626 * errors. 2627 * 2628 * TODO: This should abort the journal and alert other nodes 2629 * that our slot needs recovery. */ 2630 2631 /* Force a panic(). This stinks, but it's better than letting 2632 * things continue without having a proper hard readonly 2633 * here. */ 2634 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2635 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2636 ocfs2_handle_error(sb); 2637 } 2638 2639 /* 2640 * Void signal blockers, because in-kernel sigprocmask() only fails 2641 * when SIG_* is wrong. 2642 */ 2643 void ocfs2_block_signals(sigset_t *oldset) 2644 { 2645 int rc; 2646 sigset_t blocked; 2647 2648 sigfillset(&blocked); 2649 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2650 BUG_ON(rc); 2651 } 2652 2653 void ocfs2_unblock_signals(sigset_t *oldset) 2654 { 2655 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2656 BUG_ON(rc); 2657 } 2658 2659 module_init(ocfs2_init); 2660 module_exit(ocfs2_exit); 2661