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 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 }; 159 160 enum { 161 Opt_barrier, 162 Opt_err_panic, 163 Opt_err_ro, 164 Opt_intr, 165 Opt_nointr, 166 Opt_hb_none, 167 Opt_hb_local, 168 Opt_hb_global, 169 Opt_data_ordered, 170 Opt_data_writeback, 171 Opt_atime_quantum, 172 Opt_slot, 173 Opt_commit, 174 Opt_localalloc, 175 Opt_localflocks, 176 Opt_stack, 177 Opt_user_xattr, 178 Opt_nouser_xattr, 179 Opt_inode64, 180 Opt_acl, 181 Opt_noacl, 182 Opt_usrquota, 183 Opt_grpquota, 184 Opt_coherency_buffered, 185 Opt_coherency_full, 186 Opt_resv_level, 187 Opt_dir_resv_level, 188 Opt_err, 189 }; 190 191 static const match_table_t tokens = { 192 {Opt_barrier, "barrier=%u"}, 193 {Opt_err_panic, "errors=panic"}, 194 {Opt_err_ro, "errors=remount-ro"}, 195 {Opt_intr, "intr"}, 196 {Opt_nointr, "nointr"}, 197 {Opt_hb_none, OCFS2_HB_NONE}, 198 {Opt_hb_local, OCFS2_HB_LOCAL}, 199 {Opt_hb_global, OCFS2_HB_GLOBAL}, 200 {Opt_data_ordered, "data=ordered"}, 201 {Opt_data_writeback, "data=writeback"}, 202 {Opt_atime_quantum, "atime_quantum=%u"}, 203 {Opt_slot, "preferred_slot=%u"}, 204 {Opt_commit, "commit=%u"}, 205 {Opt_localalloc, "localalloc=%d"}, 206 {Opt_localflocks, "localflocks"}, 207 {Opt_stack, "cluster_stack=%s"}, 208 {Opt_user_xattr, "user_xattr"}, 209 {Opt_nouser_xattr, "nouser_xattr"}, 210 {Opt_inode64, "inode64"}, 211 {Opt_acl, "acl"}, 212 {Opt_noacl, "noacl"}, 213 {Opt_usrquota, "usrquota"}, 214 {Opt_grpquota, "grpquota"}, 215 {Opt_coherency_buffered, "coherency=buffered"}, 216 {Opt_coherency_full, "coherency=full"}, 217 {Opt_resv_level, "resv_level=%u"}, 218 {Opt_dir_resv_level, "dir_resv_level=%u"}, 219 {Opt_err, NULL} 220 }; 221 222 #ifdef CONFIG_DEBUG_FS 223 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 224 { 225 struct ocfs2_cluster_connection *cconn = osb->cconn; 226 struct ocfs2_recovery_map *rm = osb->recovery_map; 227 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 228 int i, out = 0; 229 230 out += snprintf(buf + out, len - out, 231 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 232 "Device", osb->dev_str, osb->uuid_str, 233 osb->fs_generation, osb->vol_label); 234 235 out += snprintf(buf + out, len - out, 236 "%10s => State: %d Flags: 0x%lX\n", "Volume", 237 atomic_read(&osb->vol_state), osb->osb_flags); 238 239 out += snprintf(buf + out, len - out, 240 "%10s => Block: %lu Cluster: %d\n", "Sizes", 241 osb->sb->s_blocksize, osb->s_clustersize); 242 243 out += snprintf(buf + out, len - out, 244 "%10s => Compat: 0x%X Incompat: 0x%X " 245 "ROcompat: 0x%X\n", 246 "Features", osb->s_feature_compat, 247 osb->s_feature_incompat, osb->s_feature_ro_compat); 248 249 out += snprintf(buf + out, len - out, 250 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 251 osb->s_mount_opt, osb->s_atime_quantum); 252 253 if (cconn) { 254 out += snprintf(buf + out, len - out, 255 "%10s => Stack: %s Name: %*s " 256 "Version: %d.%d\n", "Cluster", 257 (*osb->osb_cluster_stack == '\0' ? 258 "o2cb" : osb->osb_cluster_stack), 259 cconn->cc_namelen, cconn->cc_name, 260 cconn->cc_version.pv_major, 261 cconn->cc_version.pv_minor); 262 } 263 264 spin_lock(&osb->dc_task_lock); 265 out += snprintf(buf + out, len - out, 266 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 267 "WorkSeq: %lu\n", "DownCnvt", 268 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 269 osb->blocked_lock_count, osb->dc_wake_sequence, 270 osb->dc_work_sequence); 271 spin_unlock(&osb->dc_task_lock); 272 273 spin_lock(&osb->osb_lock); 274 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 275 "Recovery", 276 (osb->recovery_thread_task ? 277 task_pid_nr(osb->recovery_thread_task) : -1)); 278 if (rm->rm_used == 0) 279 out += snprintf(buf + out, len - out, " None\n"); 280 else { 281 for (i = 0; i < rm->rm_used; i++) 282 out += snprintf(buf + out, len - out, " %d", 283 rm->rm_entries[i]); 284 out += snprintf(buf + out, len - out, "\n"); 285 } 286 spin_unlock(&osb->osb_lock); 287 288 out += snprintf(buf + out, len - out, 289 "%10s => Pid: %d Interval: %lu\n", "Commit", 290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 291 osb->osb_commit_interval); 292 293 out += snprintf(buf + out, len - out, 294 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 295 "Journal", osb->journal->j_state, 296 osb->journal->j_trans_id, 297 atomic_read(&osb->journal->j_num_trans)); 298 299 out += snprintf(buf + out, len - out, 300 "%10s => GlobalAllocs: %d LocalAllocs: %d " 301 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 302 "Stats", 303 atomic_read(&osb->alloc_stats.bitmap_data), 304 atomic_read(&osb->alloc_stats.local_data), 305 atomic_read(&osb->alloc_stats.bg_allocs), 306 atomic_read(&osb->alloc_stats.moves), 307 atomic_read(&osb->alloc_stats.bg_extends)); 308 309 out += snprintf(buf + out, len - out, 310 "%10s => State: %u Descriptor: %llu Size: %u bits " 311 "Default: %u bits\n", 312 "LocalAlloc", osb->local_alloc_state, 313 (unsigned long long)osb->la_last_gd, 314 osb->local_alloc_bits, osb->local_alloc_default_bits); 315 316 spin_lock(&osb->osb_lock); 317 out += snprintf(buf + out, len - out, 318 "%10s => InodeSlot: %d StolenInodes: %d, " 319 "MetaSlot: %d StolenMeta: %d\n", "Steal", 320 osb->s_inode_steal_slot, 321 atomic_read(&osb->s_num_inodes_stolen), 322 osb->s_meta_steal_slot, 323 atomic_read(&osb->s_num_meta_stolen)); 324 spin_unlock(&osb->osb_lock); 325 326 out += snprintf(buf + out, len - out, "OrphanScan => "); 327 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 328 os->os_count, os->os_seqno); 329 out += snprintf(buf + out, len - out, " Last Scan: "); 330 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 331 out += snprintf(buf + out, len - out, "Disabled\n"); 332 else 333 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 334 (get_seconds() - os->os_scantime.tv_sec)); 335 336 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 337 "Slots", "Num", "RecoGen"); 338 for (i = 0; i < osb->max_slots; ++i) { 339 out += snprintf(buf + out, len - out, 340 "%10s %c %3d %10d\n", 341 " ", 342 (i == osb->slot_num ? '*' : ' '), 343 i, osb->slot_recovery_generations[i]); 344 } 345 346 return out; 347 } 348 349 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 350 { 351 struct ocfs2_super *osb = inode->i_private; 352 char *buf = NULL; 353 354 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 355 if (!buf) 356 goto bail; 357 358 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 359 360 file->private_data = buf; 361 362 return 0; 363 bail: 364 return -ENOMEM; 365 } 366 367 static int ocfs2_debug_release(struct inode *inode, struct file *file) 368 { 369 kfree(file->private_data); 370 return 0; 371 } 372 373 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 374 size_t nbytes, loff_t *ppos) 375 { 376 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 377 i_size_read(file->f_mapping->host)); 378 } 379 #else 380 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 381 { 382 return 0; 383 } 384 static int ocfs2_debug_release(struct inode *inode, struct file *file) 385 { 386 return 0; 387 } 388 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 389 size_t nbytes, loff_t *ppos) 390 { 391 return 0; 392 } 393 #endif /* CONFIG_DEBUG_FS */ 394 395 static const struct file_operations ocfs2_osb_debug_fops = { 396 .open = ocfs2_osb_debug_open, 397 .release = ocfs2_debug_release, 398 .read = ocfs2_debug_read, 399 .llseek = generic_file_llseek, 400 }; 401 402 static int ocfs2_sync_fs(struct super_block *sb, int wait) 403 { 404 int status; 405 tid_t target; 406 struct ocfs2_super *osb = OCFS2_SB(sb); 407 408 if (ocfs2_is_hard_readonly(osb)) 409 return -EROFS; 410 411 if (wait) { 412 status = ocfs2_flush_truncate_log(osb); 413 if (status < 0) 414 mlog_errno(status); 415 } else { 416 ocfs2_schedule_truncate_log_flush(osb, 0); 417 } 418 419 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 420 &target)) { 421 if (wait) 422 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 423 target); 424 } 425 return 0; 426 } 427 428 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 429 { 430 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 431 && (ino == USER_QUOTA_SYSTEM_INODE 432 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 433 return 0; 434 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 435 && (ino == GROUP_QUOTA_SYSTEM_INODE 436 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 437 return 0; 438 return 1; 439 } 440 441 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 442 { 443 struct inode *new = NULL; 444 int status = 0; 445 int i; 446 447 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 448 if (IS_ERR(new)) { 449 status = PTR_ERR(new); 450 mlog_errno(status); 451 goto bail; 452 } 453 osb->root_inode = new; 454 455 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 456 if (IS_ERR(new)) { 457 status = PTR_ERR(new); 458 mlog_errno(status); 459 goto bail; 460 } 461 osb->sys_root_inode = new; 462 463 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 464 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 465 if (!ocfs2_need_system_inode(osb, i)) 466 continue; 467 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 468 if (!new) { 469 ocfs2_release_system_inodes(osb); 470 status = -EINVAL; 471 mlog_errno(status); 472 /* FIXME: Should ERROR_RO_FS */ 473 mlog(ML_ERROR, "Unable to load system inode %d, " 474 "possibly corrupt fs?", i); 475 goto bail; 476 } 477 // the array now has one ref, so drop this one 478 iput(new); 479 } 480 481 bail: 482 if (status) 483 mlog_errno(status); 484 return status; 485 } 486 487 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 488 { 489 struct inode *new = NULL; 490 int status = 0; 491 int i; 492 493 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 494 i < NUM_SYSTEM_INODES; 495 i++) { 496 if (!ocfs2_need_system_inode(osb, i)) 497 continue; 498 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 499 if (!new) { 500 ocfs2_release_system_inodes(osb); 501 status = -EINVAL; 502 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 503 status, i, osb->slot_num); 504 goto bail; 505 } 506 /* the array now has one ref, so drop this one */ 507 iput(new); 508 } 509 510 bail: 511 if (status) 512 mlog_errno(status); 513 return status; 514 } 515 516 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 517 { 518 int i; 519 struct inode *inode; 520 521 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 522 inode = osb->global_system_inodes[i]; 523 if (inode) { 524 iput(inode); 525 osb->global_system_inodes[i] = NULL; 526 } 527 } 528 529 inode = osb->sys_root_inode; 530 if (inode) { 531 iput(inode); 532 osb->sys_root_inode = NULL; 533 } 534 535 inode = osb->root_inode; 536 if (inode) { 537 iput(inode); 538 osb->root_inode = NULL; 539 } 540 541 if (!osb->local_system_inodes) 542 return; 543 544 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 545 if (osb->local_system_inodes[i]) { 546 iput(osb->local_system_inodes[i]); 547 osb->local_system_inodes[i] = NULL; 548 } 549 } 550 551 kfree(osb->local_system_inodes); 552 osb->local_system_inodes = NULL; 553 } 554 555 /* We're allocating fs objects, use GFP_NOFS */ 556 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 557 { 558 struct ocfs2_inode_info *oi; 559 560 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 561 if (!oi) 562 return NULL; 563 564 oi->i_sync_tid = 0; 565 oi->i_datasync_tid = 0; 566 567 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 568 return &oi->vfs_inode; 569 } 570 571 static void ocfs2_i_callback(struct rcu_head *head) 572 { 573 struct inode *inode = container_of(head, struct inode, i_rcu); 574 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 575 } 576 577 static void ocfs2_destroy_inode(struct inode *inode) 578 { 579 call_rcu(&inode->i_rcu, ocfs2_i_callback); 580 } 581 582 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 583 unsigned int cbits) 584 { 585 unsigned int bytes = 1 << cbits; 586 unsigned int trim = bytes; 587 unsigned int bitshift = 32; 588 589 /* 590 * i_size and all block offsets in ocfs2 are always 64 bits 591 * wide. i_clusters is 32 bits, in cluster-sized units. So on 592 * 64 bit platforms, cluster size will be the limiting factor. 593 */ 594 595 #if BITS_PER_LONG == 32 596 # if defined(CONFIG_LBDAF) 597 BUILD_BUG_ON(sizeof(sector_t) != 8); 598 /* 599 * We might be limited by page cache size. 600 */ 601 if (bytes > PAGE_CACHE_SIZE) { 602 bytes = PAGE_CACHE_SIZE; 603 trim = 1; 604 /* 605 * Shift by 31 here so that we don't get larger than 606 * MAX_LFS_FILESIZE 607 */ 608 bitshift = 31; 609 } 610 # else 611 /* 612 * We are limited by the size of sector_t. Use block size, as 613 * that's what we expose to the VFS. 614 */ 615 bytes = 1 << bbits; 616 trim = 1; 617 bitshift = 31; 618 # endif 619 #endif 620 621 /* 622 * Trim by a whole cluster when we can actually approach the 623 * on-disk limits. Otherwise we can overflow i_clusters when 624 * an extent start is at the max offset. 625 */ 626 return (((unsigned long long)bytes) << bitshift) - trim; 627 } 628 629 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 630 { 631 int incompat_features; 632 int ret = 0; 633 struct mount_options parsed_options; 634 struct ocfs2_super *osb = OCFS2_SB(sb); 635 u32 tmp; 636 637 sync_filesystem(sb); 638 639 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 640 !ocfs2_check_set_options(sb, &parsed_options)) { 641 ret = -EINVAL; 642 goto out; 643 } 644 645 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 646 OCFS2_MOUNT_HB_NONE; 647 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 648 ret = -EINVAL; 649 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 650 goto out; 651 } 652 653 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 654 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 655 ret = -EINVAL; 656 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 657 goto out; 658 } 659 660 /* Probably don't want this on remount; it might 661 * mess with other nodes */ 662 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 663 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 664 ret = -EINVAL; 665 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 666 goto out; 667 } 668 669 /* We're going to/from readonly mode. */ 670 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 671 /* Disable quota accounting before remounting RO */ 672 if (*flags & MS_RDONLY) { 673 ret = ocfs2_susp_quotas(osb, 0); 674 if (ret < 0) 675 goto out; 676 } 677 /* Lock here so the check of HARD_RO and the potential 678 * setting of SOFT_RO is atomic. */ 679 spin_lock(&osb->osb_lock); 680 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 681 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 682 ret = -EROFS; 683 goto unlock_osb; 684 } 685 686 if (*flags & MS_RDONLY) { 687 sb->s_flags |= MS_RDONLY; 688 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 689 } else { 690 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 691 mlog(ML_ERROR, "Cannot remount RDWR " 692 "filesystem due to previous errors.\n"); 693 ret = -EROFS; 694 goto unlock_osb; 695 } 696 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 697 if (incompat_features) { 698 mlog(ML_ERROR, "Cannot remount RDWR because " 699 "of unsupported optional features " 700 "(%x).\n", incompat_features); 701 ret = -EINVAL; 702 goto unlock_osb; 703 } 704 sb->s_flags &= ~MS_RDONLY; 705 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 706 } 707 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 708 unlock_osb: 709 spin_unlock(&osb->osb_lock); 710 /* Enable quota accounting after remounting RW */ 711 if (!ret && !(*flags & MS_RDONLY)) { 712 if (sb_any_quota_suspended(sb)) 713 ret = ocfs2_susp_quotas(osb, 1); 714 else 715 ret = ocfs2_enable_quotas(osb); 716 if (ret < 0) { 717 /* Return back changes... */ 718 spin_lock(&osb->osb_lock); 719 sb->s_flags |= MS_RDONLY; 720 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 721 spin_unlock(&osb->osb_lock); 722 goto out; 723 } 724 } 725 } 726 727 if (!ret) { 728 /* Only save off the new mount options in case of a successful 729 * remount. */ 730 osb->s_mount_opt = parsed_options.mount_opt; 731 osb->s_atime_quantum = parsed_options.atime_quantum; 732 osb->preferred_slot = parsed_options.slot; 733 if (parsed_options.commit_interval) 734 osb->osb_commit_interval = parsed_options.commit_interval; 735 736 if (!ocfs2_is_hard_readonly(osb)) 737 ocfs2_set_journal_params(osb); 738 739 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 740 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 741 MS_POSIXACL : 0); 742 } 743 out: 744 return ret; 745 } 746 747 static int ocfs2_sb_probe(struct super_block *sb, 748 struct buffer_head **bh, 749 int *sector_size, 750 struct ocfs2_blockcheck_stats *stats) 751 { 752 int status, tmpstat; 753 struct ocfs1_vol_disk_hdr *hdr; 754 struct ocfs2_dinode *di; 755 int blksize; 756 757 *bh = NULL; 758 759 /* may be > 512 */ 760 *sector_size = bdev_logical_block_size(sb->s_bdev); 761 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 762 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 763 *sector_size, OCFS2_MAX_BLOCKSIZE); 764 status = -EINVAL; 765 goto bail; 766 } 767 768 /* Can this really happen? */ 769 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 770 *sector_size = OCFS2_MIN_BLOCKSIZE; 771 772 /* check block zero for old format */ 773 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 774 if (status < 0) { 775 mlog_errno(status); 776 goto bail; 777 } 778 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 779 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 780 mlog(ML_ERROR, "incompatible version: %u.%u\n", 781 hdr->major_version, hdr->minor_version); 782 status = -EINVAL; 783 } 784 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 785 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 786 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 787 hdr->signature); 788 status = -EINVAL; 789 } 790 brelse(*bh); 791 *bh = NULL; 792 if (status < 0) { 793 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 794 "upgraded before mounting with ocfs v2\n"); 795 goto bail; 796 } 797 798 /* 799 * Now check at magic offset for 512, 1024, 2048, 4096 800 * blocksizes. 4096 is the maximum blocksize because it is 801 * the minimum clustersize. 802 */ 803 status = -EINVAL; 804 for (blksize = *sector_size; 805 blksize <= OCFS2_MAX_BLOCKSIZE; 806 blksize <<= 1) { 807 tmpstat = ocfs2_get_sector(sb, bh, 808 OCFS2_SUPER_BLOCK_BLKNO, 809 blksize); 810 if (tmpstat < 0) { 811 status = tmpstat; 812 mlog_errno(status); 813 break; 814 } 815 di = (struct ocfs2_dinode *) (*bh)->b_data; 816 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 817 spin_lock_init(&stats->b_lock); 818 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 819 if (tmpstat < 0) { 820 brelse(*bh); 821 *bh = NULL; 822 } 823 if (tmpstat != -EAGAIN) { 824 status = tmpstat; 825 break; 826 } 827 } 828 829 bail: 830 return status; 831 } 832 833 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 834 { 835 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 836 837 if (osb->s_mount_opt & hb_enabled) { 838 if (ocfs2_mount_local(osb)) { 839 mlog(ML_ERROR, "Cannot heartbeat on a locally " 840 "mounted device.\n"); 841 return -EINVAL; 842 } 843 if (ocfs2_userspace_stack(osb)) { 844 mlog(ML_ERROR, "Userspace stack expected, but " 845 "o2cb heartbeat arguments passed to mount\n"); 846 return -EINVAL; 847 } 848 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 849 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 850 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 851 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 852 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 853 return -EINVAL; 854 } 855 } 856 857 if (!(osb->s_mount_opt & hb_enabled)) { 858 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 859 !ocfs2_userspace_stack(osb)) { 860 mlog(ML_ERROR, "Heartbeat has to be started to mount " 861 "a read-write clustered device.\n"); 862 return -EINVAL; 863 } 864 } 865 866 return 0; 867 } 868 869 /* 870 * If we're using a userspace stack, mount should have passed 871 * a name that matches the disk. If not, mount should not 872 * have passed a stack. 873 */ 874 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 875 struct mount_options *mopt) 876 { 877 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 878 mlog(ML_ERROR, 879 "cluster stack passed to mount, but this filesystem " 880 "does not support it\n"); 881 return -EINVAL; 882 } 883 884 if (ocfs2_userspace_stack(osb) && 885 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 886 OCFS2_STACK_LABEL_LEN)) { 887 mlog(ML_ERROR, 888 "cluster stack passed to mount (\"%s\") does not " 889 "match the filesystem (\"%s\")\n", 890 mopt->cluster_stack, 891 osb->osb_cluster_stack); 892 return -EINVAL; 893 } 894 895 return 0; 896 } 897 898 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 899 { 900 int type; 901 struct super_block *sb = osb->sb; 902 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 903 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 904 int status = 0; 905 906 for (type = 0; type < MAXQUOTAS; type++) { 907 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 908 continue; 909 if (unsuspend) 910 status = dquot_resume(sb, type); 911 else { 912 struct ocfs2_mem_dqinfo *oinfo; 913 914 /* Cancel periodic syncing before suspending */ 915 oinfo = sb_dqinfo(sb, type)->dqi_priv; 916 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 917 status = dquot_suspend(sb, type); 918 } 919 if (status < 0) 920 break; 921 } 922 if (status < 0) 923 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 924 "remount (error = %d).\n", status); 925 return status; 926 } 927 928 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 929 { 930 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 931 struct super_block *sb = osb->sb; 932 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 933 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 934 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 935 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 936 int status; 937 int type; 938 939 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 940 for (type = 0; type < MAXQUOTAS; type++) { 941 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 942 continue; 943 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 944 osb->slot_num); 945 if (!inode[type]) { 946 status = -ENOENT; 947 goto out_quota_off; 948 } 949 status = dquot_enable(inode[type], type, QFMT_OCFS2, 950 DQUOT_USAGE_ENABLED); 951 if (status < 0) 952 goto out_quota_off; 953 } 954 955 for (type = 0; type < MAXQUOTAS; type++) 956 iput(inode[type]); 957 return 0; 958 out_quota_off: 959 ocfs2_disable_quotas(osb); 960 for (type = 0; type < MAXQUOTAS; type++) 961 iput(inode[type]); 962 mlog_errno(status); 963 return status; 964 } 965 966 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 967 { 968 int type; 969 struct inode *inode; 970 struct super_block *sb = osb->sb; 971 struct ocfs2_mem_dqinfo *oinfo; 972 973 /* We mostly ignore errors in this function because there's not much 974 * we can do when we see them */ 975 for (type = 0; type < MAXQUOTAS; type++) { 976 if (!sb_has_quota_loaded(sb, type)) 977 continue; 978 /* Cancel periodic syncing before we grab dqonoff_mutex */ 979 oinfo = sb_dqinfo(sb, type)->dqi_priv; 980 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 981 inode = igrab(sb->s_dquot.files[type]); 982 /* Turn off quotas. This will remove all dquot structures from 983 * memory and so they will be automatically synced to global 984 * quota files */ 985 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 986 DQUOT_LIMITS_ENABLED); 987 if (!inode) 988 continue; 989 iput(inode); 990 } 991 } 992 993 /* Handle quota on quotactl */ 994 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id) 995 { 996 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 997 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 998 999 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 1000 return -EINVAL; 1001 1002 return dquot_enable(sb_dqopt(sb)->files[type], type, 1003 format_id, DQUOT_LIMITS_ENABLED); 1004 } 1005 1006 /* Handle quota off quotactl */ 1007 static int ocfs2_quota_off(struct super_block *sb, int type) 1008 { 1009 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 1010 } 1011 1012 static const struct quotactl_ops ocfs2_quotactl_ops = { 1013 .quota_on_meta = ocfs2_quota_on, 1014 .quota_off = ocfs2_quota_off, 1015 .quota_sync = dquot_quota_sync, 1016 .get_info = dquot_get_dqinfo, 1017 .set_info = dquot_set_dqinfo, 1018 .get_dqblk = dquot_get_dqblk, 1019 .set_dqblk = dquot_set_dqblk, 1020 }; 1021 1022 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1023 { 1024 struct dentry *root; 1025 int status, sector_size; 1026 struct mount_options parsed_options; 1027 struct inode *inode = NULL; 1028 struct ocfs2_super *osb = NULL; 1029 struct buffer_head *bh = NULL; 1030 char nodestr[12]; 1031 struct ocfs2_blockcheck_stats stats; 1032 1033 trace_ocfs2_fill_super(sb, data, silent); 1034 1035 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1036 status = -EINVAL; 1037 goto read_super_error; 1038 } 1039 1040 /* probe for superblock */ 1041 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1042 if (status < 0) { 1043 mlog(ML_ERROR, "superblock probe failed!\n"); 1044 goto read_super_error; 1045 } 1046 1047 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1048 osb = OCFS2_SB(sb); 1049 if (status < 0) { 1050 mlog_errno(status); 1051 goto read_super_error; 1052 } 1053 brelse(bh); 1054 bh = NULL; 1055 1056 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1057 status = -EINVAL; 1058 goto read_super_error; 1059 } 1060 osb->s_mount_opt = parsed_options.mount_opt; 1061 osb->s_atime_quantum = parsed_options.atime_quantum; 1062 osb->preferred_slot = parsed_options.slot; 1063 osb->osb_commit_interval = parsed_options.commit_interval; 1064 1065 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1066 osb->osb_resv_level = parsed_options.resv_level; 1067 osb->osb_dir_resv_level = parsed_options.resv_level; 1068 if (parsed_options.dir_resv_level == -1) 1069 osb->osb_dir_resv_level = parsed_options.resv_level; 1070 else 1071 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1072 1073 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1074 if (status) 1075 goto read_super_error; 1076 1077 sb->s_magic = OCFS2_SUPER_MAGIC; 1078 1079 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1080 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1081 1082 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1083 * heartbeat=none */ 1084 if (bdev_read_only(sb->s_bdev)) { 1085 if (!(sb->s_flags & MS_RDONLY)) { 1086 status = -EACCES; 1087 mlog(ML_ERROR, "Readonly device detected but readonly " 1088 "mount was not specified.\n"); 1089 goto read_super_error; 1090 } 1091 1092 /* You should not be able to start a local heartbeat 1093 * on a readonly device. */ 1094 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1095 status = -EROFS; 1096 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1097 "device.\n"); 1098 goto read_super_error; 1099 } 1100 1101 status = ocfs2_check_journals_nolocks(osb); 1102 if (status < 0) { 1103 if (status == -EROFS) 1104 mlog(ML_ERROR, "Recovery required on readonly " 1105 "file system, but write access is " 1106 "unavailable.\n"); 1107 else 1108 mlog_errno(status); 1109 goto read_super_error; 1110 } 1111 1112 ocfs2_set_ro_flag(osb, 1); 1113 1114 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1115 "Cluster services will not be used for this mount. " 1116 "Recovery will be skipped.\n", osb->dev_str); 1117 } 1118 1119 if (!ocfs2_is_hard_readonly(osb)) { 1120 if (sb->s_flags & MS_RDONLY) 1121 ocfs2_set_ro_flag(osb, 0); 1122 } 1123 1124 status = ocfs2_verify_heartbeat(osb); 1125 if (status < 0) { 1126 mlog_errno(status); 1127 goto read_super_error; 1128 } 1129 1130 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1131 ocfs2_debugfs_root); 1132 if (!osb->osb_debug_root) { 1133 status = -EINVAL; 1134 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1135 goto read_super_error; 1136 } 1137 1138 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1139 osb->osb_debug_root, 1140 osb, 1141 &ocfs2_osb_debug_fops); 1142 if (!osb->osb_ctxt) { 1143 status = -EINVAL; 1144 mlog_errno(status); 1145 goto read_super_error; 1146 } 1147 1148 if (ocfs2_meta_ecc(osb)) { 1149 status = ocfs2_blockcheck_stats_debugfs_install( 1150 &osb->osb_ecc_stats, 1151 osb->osb_debug_root); 1152 if (status) { 1153 mlog(ML_ERROR, 1154 "Unable to create blockcheck statistics " 1155 "files\n"); 1156 goto read_super_error; 1157 } 1158 } 1159 1160 status = ocfs2_mount_volume(sb); 1161 if (status < 0) 1162 goto read_super_error; 1163 1164 if (osb->root_inode) 1165 inode = igrab(osb->root_inode); 1166 1167 if (!inode) { 1168 status = -EIO; 1169 mlog_errno(status); 1170 goto read_super_error; 1171 } 1172 1173 root = d_make_root(inode); 1174 if (!root) { 1175 status = -ENOMEM; 1176 mlog_errno(status); 1177 goto read_super_error; 1178 } 1179 1180 sb->s_root = root; 1181 1182 ocfs2_complete_mount_recovery(osb); 1183 1184 if (ocfs2_mount_local(osb)) 1185 snprintf(nodestr, sizeof(nodestr), "local"); 1186 else 1187 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1188 1189 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1190 "with %s data mode.\n", 1191 osb->dev_str, nodestr, osb->slot_num, 1192 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1193 "ordered"); 1194 1195 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1196 wake_up(&osb->osb_mount_event); 1197 1198 /* Now we can initialize quotas because we can afford to wait 1199 * for cluster locks recovery now. That also means that truncation 1200 * log recovery can happen but that waits for proper quota setup */ 1201 if (!(sb->s_flags & MS_RDONLY)) { 1202 status = ocfs2_enable_quotas(osb); 1203 if (status < 0) { 1204 /* We have to err-out specially here because 1205 * s_root is already set */ 1206 mlog_errno(status); 1207 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1208 wake_up(&osb->osb_mount_event); 1209 return status; 1210 } 1211 } 1212 1213 ocfs2_complete_quota_recovery(osb); 1214 1215 /* Now we wake up again for processes waiting for quotas */ 1216 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1217 wake_up(&osb->osb_mount_event); 1218 1219 /* Start this when the mount is almost sure of being successful */ 1220 ocfs2_orphan_scan_start(osb); 1221 1222 return status; 1223 1224 read_super_error: 1225 brelse(bh); 1226 1227 if (osb) { 1228 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1229 wake_up(&osb->osb_mount_event); 1230 ocfs2_dismount_volume(sb, 1); 1231 } 1232 1233 if (status) 1234 mlog_errno(status); 1235 return status; 1236 } 1237 1238 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1239 int flags, 1240 const char *dev_name, 1241 void *data) 1242 { 1243 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1244 } 1245 1246 static struct file_system_type ocfs2_fs_type = { 1247 .owner = THIS_MODULE, 1248 .name = "ocfs2", 1249 .mount = ocfs2_mount, 1250 .kill_sb = kill_block_super, 1251 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1252 .next = NULL 1253 }; 1254 MODULE_ALIAS_FS("ocfs2"); 1255 1256 static int ocfs2_check_set_options(struct super_block *sb, 1257 struct mount_options *options) 1258 { 1259 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1260 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1261 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1262 mlog(ML_ERROR, "User quotas were requested, but this " 1263 "filesystem does not have the feature enabled.\n"); 1264 return 0; 1265 } 1266 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1267 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1268 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1269 mlog(ML_ERROR, "Group quotas were requested, but this " 1270 "filesystem does not have the feature enabled.\n"); 1271 return 0; 1272 } 1273 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1274 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1275 mlog(ML_ERROR, "ACL support requested but extended attributes " 1276 "feature is not enabled\n"); 1277 return 0; 1278 } 1279 /* No ACL setting specified? Use XATTR feature... */ 1280 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1281 OCFS2_MOUNT_NO_POSIX_ACL))) { 1282 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1283 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1284 else 1285 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1286 } 1287 return 1; 1288 } 1289 1290 static int ocfs2_parse_options(struct super_block *sb, 1291 char *options, 1292 struct mount_options *mopt, 1293 int is_remount) 1294 { 1295 int status, user_stack = 0; 1296 char *p; 1297 u32 tmp; 1298 1299 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1300 1301 mopt->commit_interval = 0; 1302 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1303 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1304 mopt->slot = OCFS2_INVALID_SLOT; 1305 mopt->localalloc_opt = -1; 1306 mopt->cluster_stack[0] = '\0'; 1307 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1308 mopt->dir_resv_level = -1; 1309 1310 if (!options) { 1311 status = 1; 1312 goto bail; 1313 } 1314 1315 while ((p = strsep(&options, ",")) != NULL) { 1316 int token, option; 1317 substring_t args[MAX_OPT_ARGS]; 1318 1319 if (!*p) 1320 continue; 1321 1322 token = match_token(p, tokens, args); 1323 switch (token) { 1324 case Opt_hb_local: 1325 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1326 break; 1327 case Opt_hb_none: 1328 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1329 break; 1330 case Opt_hb_global: 1331 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1332 break; 1333 case Opt_barrier: 1334 if (match_int(&args[0], &option)) { 1335 status = 0; 1336 goto bail; 1337 } 1338 if (option) 1339 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1340 else 1341 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1342 break; 1343 case Opt_intr: 1344 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1345 break; 1346 case Opt_nointr: 1347 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1348 break; 1349 case Opt_err_panic: 1350 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1351 break; 1352 case Opt_err_ro: 1353 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1354 break; 1355 case Opt_data_ordered: 1356 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1357 break; 1358 case Opt_data_writeback: 1359 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1360 break; 1361 case Opt_user_xattr: 1362 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1363 break; 1364 case Opt_nouser_xattr: 1365 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1366 break; 1367 case Opt_atime_quantum: 1368 if (match_int(&args[0], &option)) { 1369 status = 0; 1370 goto bail; 1371 } 1372 if (option >= 0) 1373 mopt->atime_quantum = option; 1374 break; 1375 case Opt_slot: 1376 option = 0; 1377 if (match_int(&args[0], &option)) { 1378 status = 0; 1379 goto bail; 1380 } 1381 if (option) 1382 mopt->slot = (s16)option; 1383 break; 1384 case Opt_commit: 1385 option = 0; 1386 if (match_int(&args[0], &option)) { 1387 status = 0; 1388 goto bail; 1389 } 1390 if (option < 0) 1391 return 0; 1392 if (option == 0) 1393 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1394 mopt->commit_interval = HZ * option; 1395 break; 1396 case Opt_localalloc: 1397 option = 0; 1398 if (match_int(&args[0], &option)) { 1399 status = 0; 1400 goto bail; 1401 } 1402 if (option >= 0) 1403 mopt->localalloc_opt = option; 1404 break; 1405 case Opt_localflocks: 1406 /* 1407 * Changing this during remount could race 1408 * flock() requests, or "unbalance" existing 1409 * ones (e.g., a lock is taken in one mode but 1410 * dropped in the other). If users care enough 1411 * to flip locking modes during remount, we 1412 * could add a "local" flag to individual 1413 * flock structures for proper tracking of 1414 * state. 1415 */ 1416 if (!is_remount) 1417 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1418 break; 1419 case Opt_stack: 1420 /* Check both that the option we were passed 1421 * is of the right length and that it is a proper 1422 * string of the right length. 1423 */ 1424 if (((args[0].to - args[0].from) != 1425 OCFS2_STACK_LABEL_LEN) || 1426 (strnlen(args[0].from, 1427 OCFS2_STACK_LABEL_LEN) != 1428 OCFS2_STACK_LABEL_LEN)) { 1429 mlog(ML_ERROR, 1430 "Invalid cluster_stack option\n"); 1431 status = 0; 1432 goto bail; 1433 } 1434 memcpy(mopt->cluster_stack, args[0].from, 1435 OCFS2_STACK_LABEL_LEN); 1436 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1437 /* 1438 * Open code the memcmp here as we don't have 1439 * an osb to pass to 1440 * ocfs2_userspace_stack(). 1441 */ 1442 if (memcmp(mopt->cluster_stack, 1443 OCFS2_CLASSIC_CLUSTER_STACK, 1444 OCFS2_STACK_LABEL_LEN)) 1445 user_stack = 1; 1446 break; 1447 case Opt_inode64: 1448 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1449 break; 1450 case Opt_usrquota: 1451 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1452 break; 1453 case Opt_grpquota: 1454 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1455 break; 1456 case Opt_coherency_buffered: 1457 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1458 break; 1459 case Opt_coherency_full: 1460 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1461 break; 1462 case Opt_acl: 1463 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1464 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1465 break; 1466 case Opt_noacl: 1467 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1468 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1469 break; 1470 case Opt_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->resv_level = option; 1480 break; 1481 case Opt_dir_resv_level: 1482 if (is_remount) 1483 break; 1484 if (match_int(&args[0], &option)) { 1485 status = 0; 1486 goto bail; 1487 } 1488 if (option >= OCFS2_MIN_RESV_LEVEL && 1489 option < OCFS2_MAX_RESV_LEVEL) 1490 mopt->dir_resv_level = option; 1491 break; 1492 default: 1493 mlog(ML_ERROR, 1494 "Unrecognized mount option \"%s\" " 1495 "or missing value\n", p); 1496 status = 0; 1497 goto bail; 1498 } 1499 } 1500 1501 if (user_stack == 0) { 1502 /* Ensure only one heartbeat mode */ 1503 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1504 OCFS2_MOUNT_HB_GLOBAL | 1505 OCFS2_MOUNT_HB_NONE); 1506 if (hweight32(tmp) != 1) { 1507 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1508 status = 0; 1509 goto bail; 1510 } 1511 } 1512 1513 status = 1; 1514 1515 bail: 1516 return status; 1517 } 1518 1519 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1520 { 1521 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1522 unsigned long opts = osb->s_mount_opt; 1523 unsigned int local_alloc_megs; 1524 1525 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1526 seq_printf(s, ",_netdev"); 1527 if (opts & OCFS2_MOUNT_HB_LOCAL) 1528 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1529 else 1530 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1531 } else 1532 seq_printf(s, ",%s", OCFS2_HB_NONE); 1533 1534 if (opts & OCFS2_MOUNT_NOINTR) 1535 seq_printf(s, ",nointr"); 1536 1537 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1538 seq_printf(s, ",data=writeback"); 1539 else 1540 seq_printf(s, ",data=ordered"); 1541 1542 if (opts & OCFS2_MOUNT_BARRIER) 1543 seq_printf(s, ",barrier=1"); 1544 1545 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1546 seq_printf(s, ",errors=panic"); 1547 else 1548 seq_printf(s, ",errors=remount-ro"); 1549 1550 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1551 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1552 1553 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1554 1555 if (osb->osb_commit_interval) 1556 seq_printf(s, ",commit=%u", 1557 (unsigned) (osb->osb_commit_interval / HZ)); 1558 1559 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1560 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1561 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1562 1563 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1564 seq_printf(s, ",localflocks,"); 1565 1566 if (osb->osb_cluster_stack[0]) 1567 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1568 osb->osb_cluster_stack); 1569 if (opts & OCFS2_MOUNT_USRQUOTA) 1570 seq_printf(s, ",usrquota"); 1571 if (opts & OCFS2_MOUNT_GRPQUOTA) 1572 seq_printf(s, ",grpquota"); 1573 1574 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1575 seq_printf(s, ",coherency=buffered"); 1576 else 1577 seq_printf(s, ",coherency=full"); 1578 1579 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1580 seq_printf(s, ",nouser_xattr"); 1581 else 1582 seq_printf(s, ",user_xattr"); 1583 1584 if (opts & OCFS2_MOUNT_INODE64) 1585 seq_printf(s, ",inode64"); 1586 1587 if (opts & OCFS2_MOUNT_POSIX_ACL) 1588 seq_printf(s, ",acl"); 1589 else 1590 seq_printf(s, ",noacl"); 1591 1592 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1593 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1594 1595 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1596 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1597 1598 return 0; 1599 } 1600 1601 static int __init ocfs2_init(void) 1602 { 1603 int status; 1604 1605 status = init_ocfs2_uptodate_cache(); 1606 if (status < 0) 1607 goto out1; 1608 1609 status = ocfs2_initialize_mem_caches(); 1610 if (status < 0) 1611 goto out2; 1612 1613 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1614 if (!ocfs2_wq) { 1615 status = -ENOMEM; 1616 goto out3; 1617 } 1618 1619 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1620 if (!ocfs2_debugfs_root) { 1621 status = -EFAULT; 1622 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 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 if (inode) 1727 iput(inode); 1728 1729 if (status) 1730 mlog_errno(status); 1731 1732 return status; 1733 } 1734 1735 static void ocfs2_inode_init_once(void *data) 1736 { 1737 struct ocfs2_inode_info *oi = data; 1738 1739 oi->ip_flags = 0; 1740 oi->ip_open_count = 0; 1741 spin_lock_init(&oi->ip_lock); 1742 ocfs2_extent_map_init(&oi->vfs_inode); 1743 INIT_LIST_HEAD(&oi->ip_io_markers); 1744 oi->ip_dir_start_lookup = 0; 1745 mutex_init(&oi->ip_unaligned_aio); 1746 init_rwsem(&oi->ip_alloc_sem); 1747 init_rwsem(&oi->ip_xattr_sem); 1748 mutex_init(&oi->ip_io_mutex); 1749 1750 oi->ip_blkno = 0ULL; 1751 oi->ip_clusters = 0; 1752 1753 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1754 1755 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1756 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1757 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1758 1759 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1760 &ocfs2_inode_caching_ops); 1761 1762 inode_init_once(&oi->vfs_inode); 1763 } 1764 1765 static int ocfs2_initialize_mem_caches(void) 1766 { 1767 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1768 sizeof(struct ocfs2_inode_info), 1769 0, 1770 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1771 SLAB_MEM_SPREAD), 1772 ocfs2_inode_init_once); 1773 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1774 sizeof(struct ocfs2_dquot), 1775 0, 1776 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1777 SLAB_MEM_SPREAD), 1778 NULL); 1779 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1780 sizeof(struct ocfs2_quota_chunk), 1781 0, 1782 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1783 NULL); 1784 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1785 !ocfs2_qf_chunk_cachep) { 1786 if (ocfs2_inode_cachep) 1787 kmem_cache_destroy(ocfs2_inode_cachep); 1788 if (ocfs2_dquot_cachep) 1789 kmem_cache_destroy(ocfs2_dquot_cachep); 1790 if (ocfs2_qf_chunk_cachep) 1791 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1792 return -ENOMEM; 1793 } 1794 1795 return 0; 1796 } 1797 1798 static void ocfs2_free_mem_caches(void) 1799 { 1800 /* 1801 * Make sure all delayed rcu free inodes are flushed before we 1802 * destroy cache. 1803 */ 1804 rcu_barrier(); 1805 if (ocfs2_inode_cachep) 1806 kmem_cache_destroy(ocfs2_inode_cachep); 1807 ocfs2_inode_cachep = NULL; 1808 1809 if (ocfs2_dquot_cachep) 1810 kmem_cache_destroy(ocfs2_dquot_cachep); 1811 ocfs2_dquot_cachep = NULL; 1812 1813 if (ocfs2_qf_chunk_cachep) 1814 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1815 ocfs2_qf_chunk_cachep = NULL; 1816 } 1817 1818 static int ocfs2_get_sector(struct super_block *sb, 1819 struct buffer_head **bh, 1820 int block, 1821 int sect_size) 1822 { 1823 if (!sb_set_blocksize(sb, sect_size)) { 1824 mlog(ML_ERROR, "unable to set blocksize\n"); 1825 return -EIO; 1826 } 1827 1828 *bh = sb_getblk(sb, block); 1829 if (!*bh) { 1830 mlog_errno(-ENOMEM); 1831 return -ENOMEM; 1832 } 1833 lock_buffer(*bh); 1834 if (!buffer_dirty(*bh)) 1835 clear_buffer_uptodate(*bh); 1836 unlock_buffer(*bh); 1837 ll_rw_block(READ, 1, bh); 1838 wait_on_buffer(*bh); 1839 if (!buffer_uptodate(*bh)) { 1840 mlog_errno(-EIO); 1841 brelse(*bh); 1842 *bh = NULL; 1843 return -EIO; 1844 } 1845 1846 return 0; 1847 } 1848 1849 static int ocfs2_mount_volume(struct super_block *sb) 1850 { 1851 int status = 0; 1852 int unlock_super = 0; 1853 struct ocfs2_super *osb = OCFS2_SB(sb); 1854 1855 if (ocfs2_is_hard_readonly(osb)) 1856 goto leave; 1857 1858 status = ocfs2_dlm_init(osb); 1859 if (status < 0) { 1860 mlog_errno(status); 1861 goto leave; 1862 } 1863 1864 status = ocfs2_super_lock(osb, 1); 1865 if (status < 0) { 1866 mlog_errno(status); 1867 goto leave; 1868 } 1869 unlock_super = 1; 1870 1871 /* This will load up the node map and add ourselves to it. */ 1872 status = ocfs2_find_slot(osb); 1873 if (status < 0) { 1874 mlog_errno(status); 1875 goto leave; 1876 } 1877 1878 /* load all node-local system inodes */ 1879 status = ocfs2_init_local_system_inodes(osb); 1880 if (status < 0) { 1881 mlog_errno(status); 1882 goto leave; 1883 } 1884 1885 status = ocfs2_check_volume(osb); 1886 if (status < 0) { 1887 mlog_errno(status); 1888 goto leave; 1889 } 1890 1891 status = ocfs2_truncate_log_init(osb); 1892 if (status < 0) 1893 mlog_errno(status); 1894 1895 leave: 1896 if (unlock_super) 1897 ocfs2_super_unlock(osb, 1); 1898 1899 return status; 1900 } 1901 1902 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1903 { 1904 int tmp, hangup_needed = 0; 1905 struct ocfs2_super *osb = NULL; 1906 char nodestr[12]; 1907 1908 trace_ocfs2_dismount_volume(sb); 1909 1910 BUG_ON(!sb); 1911 osb = OCFS2_SB(sb); 1912 BUG_ON(!osb); 1913 1914 debugfs_remove(osb->osb_ctxt); 1915 1916 /* Orphan scan should be stopped as early as possible */ 1917 ocfs2_orphan_scan_stop(osb); 1918 1919 ocfs2_disable_quotas(osb); 1920 1921 /* All dquots should be freed by now */ 1922 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1923 /* Wait for worker to be done with the work structure in osb */ 1924 cancel_work_sync(&osb->dquot_drop_work); 1925 1926 ocfs2_shutdown_local_alloc(osb); 1927 1928 ocfs2_truncate_log_shutdown(osb); 1929 1930 /* This will disable recovery and flush any recovery work. */ 1931 ocfs2_recovery_exit(osb); 1932 1933 ocfs2_journal_shutdown(osb); 1934 1935 ocfs2_sync_blockdev(sb); 1936 1937 ocfs2_purge_refcount_trees(osb); 1938 1939 /* No cluster connection means we've failed during mount, so skip 1940 * all the steps which depended on that to complete. */ 1941 if (osb->cconn) { 1942 tmp = ocfs2_super_lock(osb, 1); 1943 if (tmp < 0) { 1944 mlog_errno(tmp); 1945 return; 1946 } 1947 } 1948 1949 if (osb->slot_num != OCFS2_INVALID_SLOT) 1950 ocfs2_put_slot(osb); 1951 1952 if (osb->cconn) 1953 ocfs2_super_unlock(osb, 1); 1954 1955 ocfs2_release_system_inodes(osb); 1956 1957 /* 1958 * If we're dismounting due to mount error, mount.ocfs2 will clean 1959 * up heartbeat. If we're a local mount, there is no heartbeat. 1960 * If we failed before we got a uuid_str yet, we can't stop 1961 * heartbeat. Otherwise, do it. 1962 */ 1963 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1964 !ocfs2_is_hard_readonly(osb)) 1965 hangup_needed = 1; 1966 1967 if (osb->cconn) 1968 ocfs2_dlm_shutdown(osb, hangup_needed); 1969 1970 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1971 debugfs_remove(osb->osb_debug_root); 1972 1973 if (hangup_needed) 1974 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1975 1976 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1977 1978 if (ocfs2_mount_local(osb)) 1979 snprintf(nodestr, sizeof(nodestr), "local"); 1980 else 1981 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1982 1983 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1984 osb->dev_str, nodestr); 1985 1986 ocfs2_delete_osb(osb); 1987 kfree(osb); 1988 sb->s_dev = 0; 1989 sb->s_fs_info = NULL; 1990 } 1991 1992 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1993 unsigned uuid_bytes) 1994 { 1995 int i, ret; 1996 char *ptr; 1997 1998 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1999 2000 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2001 if (osb->uuid_str == NULL) 2002 return -ENOMEM; 2003 2004 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2005 /* print with null */ 2006 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2007 if (ret != 2) /* drop super cleans up */ 2008 return -EINVAL; 2009 /* then only advance past the last char */ 2010 ptr += 2; 2011 } 2012 2013 return 0; 2014 } 2015 2016 /* Make sure entire volume is addressable by our journal. Requires 2017 osb_clusters_at_boot to be valid and for the journal to have been 2018 initialized by ocfs2_journal_init(). */ 2019 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2020 { 2021 int status = 0; 2022 u64 max_block = 2023 ocfs2_clusters_to_blocks(osb->sb, 2024 osb->osb_clusters_at_boot) - 1; 2025 2026 /* 32-bit block number is always OK. */ 2027 if (max_block <= (u32)~0ULL) 2028 goto out; 2029 2030 /* Volume is "huge", so see if our journal is new enough to 2031 support it. */ 2032 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2033 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2034 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2035 JBD2_FEATURE_INCOMPAT_64BIT))) { 2036 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2037 "Enable the 'block64' journal option with tunefs.ocfs2"); 2038 status = -EFBIG; 2039 goto out; 2040 } 2041 2042 out: 2043 return status; 2044 } 2045 2046 static int ocfs2_initialize_super(struct super_block *sb, 2047 struct buffer_head *bh, 2048 int sector_size, 2049 struct ocfs2_blockcheck_stats *stats) 2050 { 2051 int status; 2052 int i, cbits, bbits; 2053 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2054 struct inode *inode = NULL; 2055 struct ocfs2_journal *journal; 2056 struct ocfs2_super *osb; 2057 u64 total_blocks; 2058 2059 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2060 if (!osb) { 2061 status = -ENOMEM; 2062 mlog_errno(status); 2063 goto bail; 2064 } 2065 2066 sb->s_fs_info = osb; 2067 sb->s_op = &ocfs2_sops; 2068 sb->s_d_op = &ocfs2_dentry_ops; 2069 sb->s_export_op = &ocfs2_export_ops; 2070 sb->s_qcop = &ocfs2_quotactl_ops; 2071 sb->dq_op = &ocfs2_quota_operations; 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 2080 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2081 2082 for (i = 0; i < 3; i++) 2083 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2084 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2085 2086 osb->sb = sb; 2087 /* Save off for ocfs2_rw_direct */ 2088 osb->s_sectsize_bits = blksize_bits(sector_size); 2089 BUG_ON(!osb->s_sectsize_bits); 2090 2091 spin_lock_init(&osb->dc_task_lock); 2092 init_waitqueue_head(&osb->dc_event); 2093 osb->dc_work_sequence = 0; 2094 osb->dc_wake_sequence = 0; 2095 INIT_LIST_HEAD(&osb->blocked_lock_list); 2096 osb->blocked_lock_count = 0; 2097 spin_lock_init(&osb->osb_lock); 2098 spin_lock_init(&osb->osb_xattr_lock); 2099 ocfs2_init_steal_slots(osb); 2100 2101 mutex_init(&osb->system_file_mutex); 2102 2103 atomic_set(&osb->alloc_stats.moves, 0); 2104 atomic_set(&osb->alloc_stats.local_data, 0); 2105 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2106 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2107 atomic_set(&osb->alloc_stats.bg_extends, 0); 2108 2109 /* Copy the blockcheck stats from the superblock probe */ 2110 osb->osb_ecc_stats = *stats; 2111 2112 ocfs2_init_node_maps(osb); 2113 2114 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2115 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2116 2117 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2118 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2119 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2120 osb->max_slots); 2121 status = -EINVAL; 2122 goto bail; 2123 } 2124 2125 ocfs2_orphan_scan_init(osb); 2126 2127 status = ocfs2_recovery_init(osb); 2128 if (status) { 2129 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2130 mlog_errno(status); 2131 goto bail; 2132 } 2133 2134 init_waitqueue_head(&osb->checkpoint_event); 2135 2136 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2137 2138 osb->slot_num = OCFS2_INVALID_SLOT; 2139 2140 osb->s_xattr_inline_size = le16_to_cpu( 2141 di->id2.i_super.s_xattr_inline_size); 2142 2143 osb->local_alloc_state = OCFS2_LA_UNUSED; 2144 osb->local_alloc_bh = NULL; 2145 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2146 2147 init_waitqueue_head(&osb->osb_mount_event); 2148 2149 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2150 if (status) { 2151 mlog_errno(status); 2152 goto bail; 2153 } 2154 2155 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2156 if (!osb->vol_label) { 2157 mlog(ML_ERROR, "unable to alloc vol label\n"); 2158 status = -ENOMEM; 2159 goto bail; 2160 } 2161 2162 osb->slot_recovery_generations = 2163 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2164 GFP_KERNEL); 2165 if (!osb->slot_recovery_generations) { 2166 status = -ENOMEM; 2167 mlog_errno(status); 2168 goto bail; 2169 } 2170 2171 init_waitqueue_head(&osb->osb_wipe_event); 2172 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2173 sizeof(*osb->osb_orphan_wipes), 2174 GFP_KERNEL); 2175 if (!osb->osb_orphan_wipes) { 2176 status = -ENOMEM; 2177 mlog_errno(status); 2178 goto bail; 2179 } 2180 2181 osb->osb_rf_lock_tree = RB_ROOT; 2182 2183 osb->s_feature_compat = 2184 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2185 osb->s_feature_ro_compat = 2186 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2187 osb->s_feature_incompat = 2188 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2189 2190 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2191 mlog(ML_ERROR, "couldn't mount because of unsupported " 2192 "optional features (%x).\n", i); 2193 status = -EINVAL; 2194 goto bail; 2195 } 2196 if (!(osb->sb->s_flags & MS_RDONLY) && 2197 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2198 mlog(ML_ERROR, "couldn't mount RDWR because of " 2199 "unsupported optional features (%x).\n", i); 2200 status = -EINVAL; 2201 goto bail; 2202 } 2203 2204 if (ocfs2_clusterinfo_valid(osb)) { 2205 osb->osb_stackflags = 2206 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2207 strlcpy(osb->osb_cluster_stack, 2208 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2209 OCFS2_STACK_LABEL_LEN + 1); 2210 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2211 mlog(ML_ERROR, 2212 "couldn't mount because of an invalid " 2213 "cluster stack label (%s) \n", 2214 osb->osb_cluster_stack); 2215 status = -EINVAL; 2216 goto bail; 2217 } 2218 strlcpy(osb->osb_cluster_name, 2219 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2220 OCFS2_CLUSTER_NAME_LEN + 1); 2221 } else { 2222 /* The empty string is identical with classic tools that 2223 * don't know about s_cluster_info. */ 2224 osb->osb_cluster_stack[0] = '\0'; 2225 } 2226 2227 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2228 2229 /* FIXME 2230 * This should be done in ocfs2_journal_init(), but unknown 2231 * ordering issues will cause the filesystem to crash. 2232 * If anyone wants to figure out what part of the code 2233 * refers to osb->journal before ocfs2_journal_init() is run, 2234 * be my guest. 2235 */ 2236 /* initialize our journal structure */ 2237 2238 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2239 if (!journal) { 2240 mlog(ML_ERROR, "unable to alloc journal\n"); 2241 status = -ENOMEM; 2242 goto bail; 2243 } 2244 osb->journal = journal; 2245 journal->j_osb = osb; 2246 2247 atomic_set(&journal->j_num_trans, 0); 2248 init_rwsem(&journal->j_trans_barrier); 2249 init_waitqueue_head(&journal->j_checkpointed); 2250 spin_lock_init(&journal->j_lock); 2251 journal->j_trans_id = (unsigned long) 1; 2252 INIT_LIST_HEAD(&journal->j_la_cleanups); 2253 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2254 journal->j_state = OCFS2_JOURNAL_FREE; 2255 2256 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2257 init_llist_head(&osb->dquot_drop_list); 2258 2259 /* get some pseudo constants for clustersize bits */ 2260 osb->s_clustersize_bits = 2261 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2262 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2263 2264 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2265 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2266 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2267 osb->s_clustersize); 2268 status = -EINVAL; 2269 goto bail; 2270 } 2271 2272 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2273 le32_to_cpu(di->i_clusters)); 2274 2275 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2276 total_blocks); 2277 if (status) { 2278 mlog(ML_ERROR, "Volume too large " 2279 "to mount safely on this system"); 2280 status = -EFBIG; 2281 goto bail; 2282 } 2283 2284 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2285 sizeof(di->id2.i_super.s_uuid))) { 2286 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2287 status = -ENOMEM; 2288 goto bail; 2289 } 2290 2291 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2292 OCFS2_MAX_VOL_LABEL_LEN); 2293 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2294 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2295 osb->first_cluster_group_blkno = 2296 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2297 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2298 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2299 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2300 (unsigned long long)osb->root_blkno, 2301 (unsigned long long)osb->system_dir_blkno, 2302 osb->s_clustersize_bits); 2303 2304 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2305 if (!osb->osb_dlm_debug) { 2306 status = -ENOMEM; 2307 mlog_errno(status); 2308 goto bail; 2309 } 2310 2311 atomic_set(&osb->vol_state, VOLUME_INIT); 2312 2313 /* load root, system_dir, and all global system inodes */ 2314 status = ocfs2_init_global_system_inodes(osb); 2315 if (status < 0) { 2316 mlog_errno(status); 2317 goto bail; 2318 } 2319 2320 /* 2321 * global bitmap 2322 */ 2323 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2324 OCFS2_INVALID_SLOT); 2325 if (!inode) { 2326 status = -EINVAL; 2327 mlog_errno(status); 2328 goto bail; 2329 } 2330 2331 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2332 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2333 iput(inode); 2334 2335 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2336 osb->s_feature_incompat) * 8; 2337 2338 status = ocfs2_init_slot_info(osb); 2339 if (status < 0) { 2340 mlog_errno(status); 2341 goto bail; 2342 } 2343 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb); 2344 2345 bail: 2346 return status; 2347 } 2348 2349 /* 2350 * will return: -EAGAIN if it is ok to keep searching for superblocks 2351 * -EINVAL if there is a bad superblock 2352 * 0 on success 2353 */ 2354 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2355 struct buffer_head *bh, 2356 u32 blksz, 2357 struct ocfs2_blockcheck_stats *stats) 2358 { 2359 int status = -EAGAIN; 2360 2361 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2362 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2363 /* We have to do a raw check of the feature here */ 2364 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2365 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2366 status = ocfs2_block_check_validate(bh->b_data, 2367 bh->b_size, 2368 &di->i_check, 2369 stats); 2370 if (status) 2371 goto out; 2372 } 2373 status = -EINVAL; 2374 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2375 mlog(ML_ERROR, "found superblock with incorrect block " 2376 "size: found %u, should be %u\n", 2377 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2378 blksz); 2379 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2380 OCFS2_MAJOR_REV_LEVEL || 2381 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2382 OCFS2_MINOR_REV_LEVEL) { 2383 mlog(ML_ERROR, "found superblock with bad version: " 2384 "found %u.%u, should be %u.%u\n", 2385 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2386 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2387 OCFS2_MAJOR_REV_LEVEL, 2388 OCFS2_MINOR_REV_LEVEL); 2389 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2390 mlog(ML_ERROR, "bad block number on superblock: " 2391 "found %llu, should be %llu\n", 2392 (unsigned long long)le64_to_cpu(di->i_blkno), 2393 (unsigned long long)bh->b_blocknr); 2394 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2395 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2396 mlog(ML_ERROR, "bad cluster size found: %u\n", 2397 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2398 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2399 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2400 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2401 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2402 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2403 mlog(ML_ERROR, 2404 "Superblock slots found greater than file system " 2405 "maximum: found %u, max %u\n", 2406 le16_to_cpu(di->id2.i_super.s_max_slots), 2407 OCFS2_MAX_SLOTS); 2408 } else { 2409 /* found it! */ 2410 status = 0; 2411 } 2412 } 2413 2414 out: 2415 if (status && status != -EAGAIN) 2416 mlog_errno(status); 2417 return status; 2418 } 2419 2420 static int ocfs2_check_volume(struct ocfs2_super *osb) 2421 { 2422 int status; 2423 int dirty; 2424 int local; 2425 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2426 * recover 2427 * ourselves. */ 2428 2429 /* Init our journal object. */ 2430 status = ocfs2_journal_init(osb->journal, &dirty); 2431 if (status < 0) { 2432 mlog(ML_ERROR, "Could not initialize journal!\n"); 2433 goto finally; 2434 } 2435 2436 /* Now that journal has been initialized, check to make sure 2437 entire volume is addressable. */ 2438 status = ocfs2_journal_addressable(osb); 2439 if (status) 2440 goto finally; 2441 2442 /* If the journal was unmounted cleanly then we don't want to 2443 * recover anything. Otherwise, journal_load will do that 2444 * dirty work for us :) */ 2445 if (!dirty) { 2446 status = ocfs2_journal_wipe(osb->journal, 0); 2447 if (status < 0) { 2448 mlog_errno(status); 2449 goto finally; 2450 } 2451 } else { 2452 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2453 "unmounted cleanly, recovering it.\n", osb->dev_str); 2454 } 2455 2456 local = ocfs2_mount_local(osb); 2457 2458 /* will play back anything left in the journal. */ 2459 status = ocfs2_journal_load(osb->journal, local, dirty); 2460 if (status < 0) { 2461 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2462 goto finally; 2463 } 2464 2465 if (dirty) { 2466 /* recover my local alloc if we didn't unmount cleanly. */ 2467 status = ocfs2_begin_local_alloc_recovery(osb, 2468 osb->slot_num, 2469 &local_alloc); 2470 if (status < 0) { 2471 mlog_errno(status); 2472 goto finally; 2473 } 2474 /* we complete the recovery process after we've marked 2475 * ourselves as mounted. */ 2476 } 2477 2478 status = ocfs2_load_local_alloc(osb); 2479 if (status < 0) { 2480 mlog_errno(status); 2481 goto finally; 2482 } 2483 2484 if (dirty) { 2485 /* Recovery will be completed after we've mounted the 2486 * rest of the volume. */ 2487 osb->dirty = 1; 2488 osb->local_alloc_copy = local_alloc; 2489 local_alloc = NULL; 2490 } 2491 2492 /* go through each journal, trylock it and if you get the 2493 * lock, and it's marked as dirty, set the bit in the recover 2494 * map and launch a recovery thread for it. */ 2495 status = ocfs2_mark_dead_nodes(osb); 2496 if (status < 0) { 2497 mlog_errno(status); 2498 goto finally; 2499 } 2500 2501 status = ocfs2_compute_replay_slots(osb); 2502 if (status < 0) 2503 mlog_errno(status); 2504 2505 finally: 2506 kfree(local_alloc); 2507 2508 if (status) 2509 mlog_errno(status); 2510 return status; 2511 } 2512 2513 /* 2514 * The routine gets called from dismount or close whenever a dismount on 2515 * volume is requested and the osb open count becomes 1. 2516 * It will remove the osb from the global list and also free up all the 2517 * initialized resources and fileobject. 2518 */ 2519 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2520 { 2521 /* This function assumes that the caller has the main osb resource */ 2522 2523 ocfs2_free_slot_info(osb); 2524 2525 kfree(osb->osb_orphan_wipes); 2526 kfree(osb->slot_recovery_generations); 2527 /* FIXME 2528 * This belongs in journal shutdown, but because we have to 2529 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2530 * we free it here. 2531 */ 2532 kfree(osb->journal); 2533 kfree(osb->local_alloc_copy); 2534 kfree(osb->uuid_str); 2535 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2536 memset(osb, 0, sizeof(struct ocfs2_super)); 2537 } 2538 2539 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2540 * panic(). We do not support continue-on-error operation. */ 2541 static void ocfs2_handle_error(struct super_block *sb) 2542 { 2543 struct ocfs2_super *osb = OCFS2_SB(sb); 2544 2545 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2546 panic("OCFS2: (device %s): panic forced after error\n", 2547 sb->s_id); 2548 2549 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2550 2551 if (sb->s_flags & MS_RDONLY && 2552 (ocfs2_is_soft_readonly(osb) || 2553 ocfs2_is_hard_readonly(osb))) 2554 return; 2555 2556 printk(KERN_CRIT "File system is now read-only due to the potential " 2557 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2558 "system is unmounted.\n"); 2559 sb->s_flags |= MS_RDONLY; 2560 ocfs2_set_ro_flag(osb, 0); 2561 } 2562 2563 static char error_buf[1024]; 2564 2565 void __ocfs2_error(struct super_block *sb, 2566 const char *function, 2567 const char *fmt, ...) 2568 { 2569 va_list args; 2570 2571 va_start(args, fmt); 2572 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2573 va_end(args); 2574 2575 /* Not using mlog here because we want to show the actual 2576 * function the error came from. */ 2577 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2578 sb->s_id, function, error_buf); 2579 2580 ocfs2_handle_error(sb); 2581 } 2582 2583 /* Handle critical errors. This is intentionally more drastic than 2584 * ocfs2_handle_error, so we only use for things like journal errors, 2585 * etc. */ 2586 void __ocfs2_abort(struct super_block* sb, 2587 const char *function, 2588 const char *fmt, ...) 2589 { 2590 va_list args; 2591 2592 va_start(args, fmt); 2593 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2594 va_end(args); 2595 2596 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2597 sb->s_id, function, error_buf); 2598 2599 /* We don't have the cluster support yet to go straight to 2600 * hard readonly in here. Until then, we want to keep 2601 * ocfs2_abort() so that we can at least mark critical 2602 * errors. 2603 * 2604 * TODO: This should abort the journal and alert other nodes 2605 * that our slot needs recovery. */ 2606 2607 /* Force a panic(). This stinks, but it's better than letting 2608 * things continue without having a proper hard readonly 2609 * here. */ 2610 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2611 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2612 ocfs2_handle_error(sb); 2613 } 2614 2615 /* 2616 * Void signal blockers, because in-kernel sigprocmask() only fails 2617 * when SIG_* is wrong. 2618 */ 2619 void ocfs2_block_signals(sigset_t *oldset) 2620 { 2621 int rc; 2622 sigset_t blocked; 2623 2624 sigfillset(&blocked); 2625 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2626 BUG_ON(rc); 2627 } 2628 2629 void ocfs2_unblock_signals(sigset_t *oldset) 2630 { 2631 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2632 BUG_ON(rc); 2633 } 2634 2635 module_init(ocfs2_init); 2636 module_exit(ocfs2_exit); 2637