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 #include <linux/signal.h> 46 47 #define CREATE_TRACE_POINTS 48 #include "ocfs2_trace.h" 49 50 #include <cluster/masklog.h> 51 52 #include "ocfs2.h" 53 54 /* this should be the only file to include a version 1 header */ 55 #include "ocfs1_fs_compat.h" 56 57 #include "alloc.h" 58 #include "aops.h" 59 #include "blockcheck.h" 60 #include "dlmglue.h" 61 #include "export.h" 62 #include "extent_map.h" 63 #include "heartbeat.h" 64 #include "inode.h" 65 #include "journal.h" 66 #include "localalloc.h" 67 #include "namei.h" 68 #include "slot_map.h" 69 #include "super.h" 70 #include "sysfile.h" 71 #include "uptodate.h" 72 #include "xattr.h" 73 #include "quota.h" 74 #include "refcounttree.h" 75 #include "suballoc.h" 76 77 #include "buffer_head_io.h" 78 #include "filecheck.h" 79 80 static struct kmem_cache *ocfs2_inode_cachep; 81 struct kmem_cache *ocfs2_dquot_cachep; 82 struct kmem_cache *ocfs2_qf_chunk_cachep; 83 84 static struct dentry *ocfs2_debugfs_root; 85 86 MODULE_AUTHOR("Oracle"); 87 MODULE_LICENSE("GPL"); 88 MODULE_DESCRIPTION("OCFS2 cluster file system"); 89 90 struct mount_options 91 { 92 unsigned long commit_interval; 93 unsigned long mount_opt; 94 unsigned int atime_quantum; 95 signed short slot; 96 int localalloc_opt; 97 unsigned int resv_level; 98 int dir_resv_level; 99 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 100 }; 101 102 static int ocfs2_parse_options(struct super_block *sb, char *options, 103 struct mount_options *mopt, 104 int is_remount); 105 static int ocfs2_check_set_options(struct super_block *sb, 106 struct mount_options *options); 107 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 108 static void ocfs2_put_super(struct super_block *sb); 109 static int ocfs2_mount_volume(struct super_block *sb); 110 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 111 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 112 static int ocfs2_initialize_mem_caches(void); 113 static void ocfs2_free_mem_caches(void); 114 static void ocfs2_delete_osb(struct ocfs2_super *osb); 115 116 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 117 118 static int ocfs2_sync_fs(struct super_block *sb, int wait); 119 120 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 121 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 122 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 123 static int ocfs2_check_volume(struct ocfs2_super *osb); 124 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 125 struct buffer_head *bh, 126 u32 sectsize, 127 struct ocfs2_blockcheck_stats *stats); 128 static int ocfs2_initialize_super(struct super_block *sb, 129 struct buffer_head *bh, 130 int sector_size, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_get_sector(struct super_block *sb, 133 struct buffer_head **bh, 134 int block, 135 int sect_size); 136 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 137 static void ocfs2_free_inode(struct inode *inode); 138 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 139 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 140 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 141 142 static struct dquot **ocfs2_get_dquots(struct inode *inode) 143 { 144 return OCFS2_I(inode)->i_dquot; 145 } 146 147 static const struct super_operations ocfs2_sops = { 148 .statfs = ocfs2_statfs, 149 .alloc_inode = ocfs2_alloc_inode, 150 .free_inode = ocfs2_free_inode, 151 .drop_inode = ocfs2_drop_inode, 152 .evict_inode = ocfs2_evict_inode, 153 .sync_fs = ocfs2_sync_fs, 154 .put_super = ocfs2_put_super, 155 .remount_fs = ocfs2_remount, 156 .show_options = ocfs2_show_options, 157 .quota_read = ocfs2_quota_read, 158 .quota_write = ocfs2_quota_write, 159 .get_dquots = ocfs2_get_dquots, 160 }; 161 162 enum { 163 Opt_barrier, 164 Opt_err_panic, 165 Opt_err_ro, 166 Opt_intr, 167 Opt_nointr, 168 Opt_hb_none, 169 Opt_hb_local, 170 Opt_hb_global, 171 Opt_data_ordered, 172 Opt_data_writeback, 173 Opt_atime_quantum, 174 Opt_slot, 175 Opt_commit, 176 Opt_localalloc, 177 Opt_localflocks, 178 Opt_stack, 179 Opt_user_xattr, 180 Opt_nouser_xattr, 181 Opt_inode64, 182 Opt_acl, 183 Opt_noacl, 184 Opt_usrquota, 185 Opt_grpquota, 186 Opt_coherency_buffered, 187 Opt_coherency_full, 188 Opt_resv_level, 189 Opt_dir_resv_level, 190 Opt_journal_async_commit, 191 Opt_err_cont, 192 Opt_err, 193 }; 194 195 static const match_table_t tokens = { 196 {Opt_barrier, "barrier=%u"}, 197 {Opt_err_panic, "errors=panic"}, 198 {Opt_err_ro, "errors=remount-ro"}, 199 {Opt_intr, "intr"}, 200 {Opt_nointr, "nointr"}, 201 {Opt_hb_none, OCFS2_HB_NONE}, 202 {Opt_hb_local, OCFS2_HB_LOCAL}, 203 {Opt_hb_global, OCFS2_HB_GLOBAL}, 204 {Opt_data_ordered, "data=ordered"}, 205 {Opt_data_writeback, "data=writeback"}, 206 {Opt_atime_quantum, "atime_quantum=%u"}, 207 {Opt_slot, "preferred_slot=%u"}, 208 {Opt_commit, "commit=%u"}, 209 {Opt_localalloc, "localalloc=%d"}, 210 {Opt_localflocks, "localflocks"}, 211 {Opt_stack, "cluster_stack=%s"}, 212 {Opt_user_xattr, "user_xattr"}, 213 {Opt_nouser_xattr, "nouser_xattr"}, 214 {Opt_inode64, "inode64"}, 215 {Opt_acl, "acl"}, 216 {Opt_noacl, "noacl"}, 217 {Opt_usrquota, "usrquota"}, 218 {Opt_grpquota, "grpquota"}, 219 {Opt_coherency_buffered, "coherency=buffered"}, 220 {Opt_coherency_full, "coherency=full"}, 221 {Opt_resv_level, "resv_level=%u"}, 222 {Opt_dir_resv_level, "dir_resv_level=%u"}, 223 {Opt_journal_async_commit, "journal_async_commit"}, 224 {Opt_err_cont, "errors=continue"}, 225 {Opt_err, NULL} 226 }; 227 228 #ifdef CONFIG_DEBUG_FS 229 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 230 { 231 struct ocfs2_cluster_connection *cconn = osb->cconn; 232 struct ocfs2_recovery_map *rm = osb->recovery_map; 233 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 234 int i, out = 0; 235 unsigned long flags; 236 237 out += snprintf(buf + out, len - out, 238 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 239 "Device", osb->dev_str, osb->uuid_str, 240 osb->fs_generation, osb->vol_label); 241 242 out += snprintf(buf + out, len - out, 243 "%10s => State: %d Flags: 0x%lX\n", "Volume", 244 atomic_read(&osb->vol_state), osb->osb_flags); 245 246 out += snprintf(buf + out, len - out, 247 "%10s => Block: %lu Cluster: %d\n", "Sizes", 248 osb->sb->s_blocksize, osb->s_clustersize); 249 250 out += snprintf(buf + out, len - out, 251 "%10s => Compat: 0x%X Incompat: 0x%X " 252 "ROcompat: 0x%X\n", 253 "Features", osb->s_feature_compat, 254 osb->s_feature_incompat, osb->s_feature_ro_compat); 255 256 out += snprintf(buf + out, len - out, 257 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 258 osb->s_mount_opt, osb->s_atime_quantum); 259 260 if (cconn) { 261 out += snprintf(buf + out, len - out, 262 "%10s => Stack: %s Name: %*s " 263 "Version: %d.%d\n", "Cluster", 264 (*osb->osb_cluster_stack == '\0' ? 265 "o2cb" : osb->osb_cluster_stack), 266 cconn->cc_namelen, cconn->cc_name, 267 cconn->cc_version.pv_major, 268 cconn->cc_version.pv_minor); 269 } 270 271 spin_lock_irqsave(&osb->dc_task_lock, flags); 272 out += snprintf(buf + out, len - out, 273 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 274 "WorkSeq: %lu\n", "DownCnvt", 275 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 276 osb->blocked_lock_count, osb->dc_wake_sequence, 277 osb->dc_work_sequence); 278 spin_unlock_irqrestore(&osb->dc_task_lock, flags); 279 280 spin_lock(&osb->osb_lock); 281 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 282 "Recovery", 283 (osb->recovery_thread_task ? 284 task_pid_nr(osb->recovery_thread_task) : -1)); 285 if (rm->rm_used == 0) 286 out += snprintf(buf + out, len - out, " None\n"); 287 else { 288 for (i = 0; i < rm->rm_used; i++) 289 out += snprintf(buf + out, len - out, " %d", 290 rm->rm_entries[i]); 291 out += snprintf(buf + out, len - out, "\n"); 292 } 293 spin_unlock(&osb->osb_lock); 294 295 out += snprintf(buf + out, len - out, 296 "%10s => Pid: %d Interval: %lu\n", "Commit", 297 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 298 osb->osb_commit_interval); 299 300 out += snprintf(buf + out, len - out, 301 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 302 "Journal", osb->journal->j_state, 303 osb->journal->j_trans_id, 304 atomic_read(&osb->journal->j_num_trans)); 305 306 out += snprintf(buf + out, len - out, 307 "%10s => GlobalAllocs: %d LocalAllocs: %d " 308 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 309 "Stats", 310 atomic_read(&osb->alloc_stats.bitmap_data), 311 atomic_read(&osb->alloc_stats.local_data), 312 atomic_read(&osb->alloc_stats.bg_allocs), 313 atomic_read(&osb->alloc_stats.moves), 314 atomic_read(&osb->alloc_stats.bg_extends)); 315 316 out += snprintf(buf + out, len - out, 317 "%10s => State: %u Descriptor: %llu Size: %u bits " 318 "Default: %u bits\n", 319 "LocalAlloc", osb->local_alloc_state, 320 (unsigned long long)osb->la_last_gd, 321 osb->local_alloc_bits, osb->local_alloc_default_bits); 322 323 spin_lock(&osb->osb_lock); 324 out += snprintf(buf + out, len - out, 325 "%10s => InodeSlot: %d StolenInodes: %d, " 326 "MetaSlot: %d StolenMeta: %d\n", "Steal", 327 osb->s_inode_steal_slot, 328 atomic_read(&osb->s_num_inodes_stolen), 329 osb->s_meta_steal_slot, 330 atomic_read(&osb->s_num_meta_stolen)); 331 spin_unlock(&osb->osb_lock); 332 333 out += snprintf(buf + out, len - out, "OrphanScan => "); 334 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 335 os->os_count, os->os_seqno); 336 out += snprintf(buf + out, len - out, " Last Scan: "); 337 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 338 out += snprintf(buf + out, len - out, "Disabled\n"); 339 else 340 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 341 (unsigned long)(ktime_get_seconds() - os->os_scantime)); 342 343 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 344 "Slots", "Num", "RecoGen"); 345 for (i = 0; i < osb->max_slots; ++i) { 346 out += snprintf(buf + out, len - out, 347 "%10s %c %3d %10d\n", 348 " ", 349 (i == osb->slot_num ? '*' : ' '), 350 i, osb->slot_recovery_generations[i]); 351 } 352 353 return out; 354 } 355 356 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 357 { 358 struct ocfs2_super *osb = inode->i_private; 359 char *buf = NULL; 360 361 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 362 if (!buf) 363 goto bail; 364 365 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 366 367 file->private_data = buf; 368 369 return 0; 370 bail: 371 return -ENOMEM; 372 } 373 374 static int ocfs2_debug_release(struct inode *inode, struct file *file) 375 { 376 kfree(file->private_data); 377 return 0; 378 } 379 380 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 381 size_t nbytes, loff_t *ppos) 382 { 383 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 384 i_size_read(file->f_mapping->host)); 385 } 386 #else 387 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 388 { 389 return 0; 390 } 391 static int ocfs2_debug_release(struct inode *inode, struct file *file) 392 { 393 return 0; 394 } 395 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 396 size_t nbytes, loff_t *ppos) 397 { 398 return 0; 399 } 400 #endif /* CONFIG_DEBUG_FS */ 401 402 static const struct file_operations ocfs2_osb_debug_fops = { 403 .open = ocfs2_osb_debug_open, 404 .release = ocfs2_debug_release, 405 .read = ocfs2_debug_read, 406 .llseek = generic_file_llseek, 407 }; 408 409 static int ocfs2_sync_fs(struct super_block *sb, int wait) 410 { 411 int status; 412 tid_t target; 413 struct ocfs2_super *osb = OCFS2_SB(sb); 414 415 if (ocfs2_is_hard_readonly(osb)) 416 return -EROFS; 417 418 if (wait) { 419 status = ocfs2_flush_truncate_log(osb); 420 if (status < 0) 421 mlog_errno(status); 422 } else { 423 ocfs2_schedule_truncate_log_flush(osb, 0); 424 } 425 426 if (jbd2_journal_start_commit(osb->journal->j_journal, 427 &target)) { 428 if (wait) 429 jbd2_log_wait_commit(osb->journal->j_journal, 430 target); 431 } 432 return 0; 433 } 434 435 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 436 { 437 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 438 && (ino == USER_QUOTA_SYSTEM_INODE 439 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 440 return 0; 441 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 442 && (ino == GROUP_QUOTA_SYSTEM_INODE 443 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 444 return 0; 445 return 1; 446 } 447 448 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 449 { 450 struct inode *new = NULL; 451 int status = 0; 452 int i; 453 454 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 455 if (IS_ERR(new)) { 456 status = PTR_ERR(new); 457 mlog_errno(status); 458 goto bail; 459 } 460 osb->root_inode = new; 461 462 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 463 if (IS_ERR(new)) { 464 status = PTR_ERR(new); 465 mlog_errno(status); 466 goto bail; 467 } 468 osb->sys_root_inode = new; 469 470 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 471 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 472 if (!ocfs2_need_system_inode(osb, i)) 473 continue; 474 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 475 if (!new) { 476 ocfs2_release_system_inodes(osb); 477 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL; 478 mlog_errno(status); 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 = ocfs2_is_soft_readonly(osb) ? -EROFS : -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_free_inode(struct inode *inode) 579 { 580 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 581 } 582 583 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 584 unsigned int cbits) 585 { 586 unsigned int bytes = 1 << cbits; 587 unsigned int trim = bytes; 588 unsigned int bitshift = 32; 589 590 /* 591 * i_size and all block offsets in ocfs2 are always 64 bits 592 * wide. i_clusters is 32 bits, in cluster-sized units. So on 593 * 64 bit platforms, cluster size will be the limiting factor. 594 */ 595 596 #if BITS_PER_LONG == 32 597 BUILD_BUG_ON(sizeof(sector_t) != 8); 598 /* 599 * We might be limited by page cache size. 600 */ 601 if (bytes > PAGE_SIZE) { 602 bytes = PAGE_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 #endif 611 612 /* 613 * Trim by a whole cluster when we can actually approach the 614 * on-disk limits. Otherwise we can overflow i_clusters when 615 * an extent start is at the max offset. 616 */ 617 return (((unsigned long long)bytes) << bitshift) - trim; 618 } 619 620 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 621 { 622 int incompat_features; 623 int ret = 0; 624 struct mount_options parsed_options; 625 struct ocfs2_super *osb = OCFS2_SB(sb); 626 u32 tmp; 627 628 sync_filesystem(sb); 629 630 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 631 !ocfs2_check_set_options(sb, &parsed_options)) { 632 ret = -EINVAL; 633 goto out; 634 } 635 636 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 637 OCFS2_MOUNT_HB_NONE; 638 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 639 ret = -EINVAL; 640 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 641 goto out; 642 } 643 644 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 645 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 646 ret = -EINVAL; 647 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 648 goto out; 649 } 650 651 /* Probably don't want this on remount; it might 652 * mess with other nodes */ 653 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 654 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 655 ret = -EINVAL; 656 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 657 goto out; 658 } 659 660 /* We're going to/from readonly mode. */ 661 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 662 /* Disable quota accounting before remounting RO */ 663 if (*flags & SB_RDONLY) { 664 ret = ocfs2_susp_quotas(osb, 0); 665 if (ret < 0) 666 goto out; 667 } 668 /* Lock here so the check of HARD_RO and the potential 669 * setting of SOFT_RO is atomic. */ 670 spin_lock(&osb->osb_lock); 671 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 672 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 673 ret = -EROFS; 674 goto unlock_osb; 675 } 676 677 if (*flags & SB_RDONLY) { 678 sb->s_flags |= SB_RDONLY; 679 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 680 } else { 681 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 682 mlog(ML_ERROR, "Cannot remount RDWR " 683 "filesystem due to previous errors.\n"); 684 ret = -EROFS; 685 goto unlock_osb; 686 } 687 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 688 if (incompat_features) { 689 mlog(ML_ERROR, "Cannot remount RDWR because " 690 "of unsupported optional features " 691 "(%x).\n", incompat_features); 692 ret = -EINVAL; 693 goto unlock_osb; 694 } 695 sb->s_flags &= ~SB_RDONLY; 696 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 697 } 698 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 699 unlock_osb: 700 spin_unlock(&osb->osb_lock); 701 /* Enable quota accounting after remounting RW */ 702 if (!ret && !(*flags & SB_RDONLY)) { 703 if (sb_any_quota_suspended(sb)) 704 ret = ocfs2_susp_quotas(osb, 1); 705 else 706 ret = ocfs2_enable_quotas(osb); 707 if (ret < 0) { 708 /* Return back changes... */ 709 spin_lock(&osb->osb_lock); 710 sb->s_flags |= SB_RDONLY; 711 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 712 spin_unlock(&osb->osb_lock); 713 goto out; 714 } 715 } 716 } 717 718 if (!ret) { 719 /* Only save off the new mount options in case of a successful 720 * remount. */ 721 osb->s_mount_opt = parsed_options.mount_opt; 722 osb->s_atime_quantum = parsed_options.atime_quantum; 723 osb->preferred_slot = parsed_options.slot; 724 if (parsed_options.commit_interval) 725 osb->osb_commit_interval = parsed_options.commit_interval; 726 727 if (!ocfs2_is_hard_readonly(osb)) 728 ocfs2_set_journal_params(osb); 729 730 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 731 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 732 SB_POSIXACL : 0); 733 } 734 out: 735 return ret; 736 } 737 738 static int ocfs2_sb_probe(struct super_block *sb, 739 struct buffer_head **bh, 740 int *sector_size, 741 struct ocfs2_blockcheck_stats *stats) 742 { 743 int status, tmpstat; 744 struct ocfs1_vol_disk_hdr *hdr; 745 struct ocfs2_dinode *di; 746 int blksize; 747 748 *bh = NULL; 749 750 /* may be > 512 */ 751 *sector_size = bdev_logical_block_size(sb->s_bdev); 752 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 753 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 754 *sector_size, OCFS2_MAX_BLOCKSIZE); 755 status = -EINVAL; 756 goto bail; 757 } 758 759 /* Can this really happen? */ 760 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 761 *sector_size = OCFS2_MIN_BLOCKSIZE; 762 763 /* check block zero for old format */ 764 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 765 if (status < 0) { 766 mlog_errno(status); 767 goto bail; 768 } 769 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 770 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 771 mlog(ML_ERROR, "incompatible version: %u.%u\n", 772 hdr->major_version, hdr->minor_version); 773 status = -EINVAL; 774 } 775 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 776 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 777 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 778 hdr->signature); 779 status = -EINVAL; 780 } 781 brelse(*bh); 782 *bh = NULL; 783 if (status < 0) { 784 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 785 "upgraded before mounting with ocfs v2\n"); 786 goto bail; 787 } 788 789 /* 790 * Now check at magic offset for 512, 1024, 2048, 4096 791 * blocksizes. 4096 is the maximum blocksize because it is 792 * the minimum clustersize. 793 */ 794 status = -EINVAL; 795 for (blksize = *sector_size; 796 blksize <= OCFS2_MAX_BLOCKSIZE; 797 blksize <<= 1) { 798 tmpstat = ocfs2_get_sector(sb, bh, 799 OCFS2_SUPER_BLOCK_BLKNO, 800 blksize); 801 if (tmpstat < 0) { 802 status = tmpstat; 803 mlog_errno(status); 804 break; 805 } 806 di = (struct ocfs2_dinode *) (*bh)->b_data; 807 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 808 spin_lock_init(&stats->b_lock); 809 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 810 if (tmpstat < 0) { 811 brelse(*bh); 812 *bh = NULL; 813 } 814 if (tmpstat != -EAGAIN) { 815 status = tmpstat; 816 break; 817 } 818 } 819 820 bail: 821 return status; 822 } 823 824 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 825 { 826 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 827 828 if (osb->s_mount_opt & hb_enabled) { 829 if (ocfs2_mount_local(osb)) { 830 mlog(ML_ERROR, "Cannot heartbeat on a locally " 831 "mounted device.\n"); 832 return -EINVAL; 833 } 834 if (ocfs2_userspace_stack(osb)) { 835 mlog(ML_ERROR, "Userspace stack expected, but " 836 "o2cb heartbeat arguments passed to mount\n"); 837 return -EINVAL; 838 } 839 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 840 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 841 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 842 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 843 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 844 return -EINVAL; 845 } 846 } 847 848 if (!(osb->s_mount_opt & hb_enabled)) { 849 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 850 !ocfs2_userspace_stack(osb)) { 851 mlog(ML_ERROR, "Heartbeat has to be started to mount " 852 "a read-write clustered device.\n"); 853 return -EINVAL; 854 } 855 } 856 857 return 0; 858 } 859 860 /* 861 * If we're using a userspace stack, mount should have passed 862 * a name that matches the disk. If not, mount should not 863 * have passed a stack. 864 */ 865 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 866 struct mount_options *mopt) 867 { 868 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 869 mlog(ML_ERROR, 870 "cluster stack passed to mount, but this filesystem " 871 "does not support it\n"); 872 return -EINVAL; 873 } 874 875 if (ocfs2_userspace_stack(osb) && 876 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 877 OCFS2_STACK_LABEL_LEN)) { 878 mlog(ML_ERROR, 879 "cluster stack passed to mount (\"%s\") does not " 880 "match the filesystem (\"%s\")\n", 881 mopt->cluster_stack, 882 osb->osb_cluster_stack); 883 return -EINVAL; 884 } 885 886 return 0; 887 } 888 889 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 890 { 891 int type; 892 struct super_block *sb = osb->sb; 893 unsigned int feature[OCFS2_MAXQUOTAS] = { 894 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 895 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 896 int status = 0; 897 898 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 899 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 900 continue; 901 if (unsuspend) 902 status = dquot_resume(sb, type); 903 else { 904 struct ocfs2_mem_dqinfo *oinfo; 905 906 /* Cancel periodic syncing before suspending */ 907 oinfo = sb_dqinfo(sb, type)->dqi_priv; 908 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 909 status = dquot_suspend(sb, type); 910 } 911 if (status < 0) 912 break; 913 } 914 if (status < 0) 915 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 916 "remount (error = %d).\n", status); 917 return status; 918 } 919 920 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 921 { 922 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 923 struct super_block *sb = osb->sb; 924 unsigned int feature[OCFS2_MAXQUOTAS] = { 925 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 926 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 927 unsigned int ino[OCFS2_MAXQUOTAS] = { 928 LOCAL_USER_QUOTA_SYSTEM_INODE, 929 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 930 int status; 931 int type; 932 933 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 934 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 935 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 936 continue; 937 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 938 osb->slot_num); 939 if (!inode[type]) { 940 status = -ENOENT; 941 goto out_quota_off; 942 } 943 status = dquot_enable(inode[type], type, QFMT_OCFS2, 944 DQUOT_USAGE_ENABLED); 945 if (status < 0) 946 goto out_quota_off; 947 } 948 949 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 950 iput(inode[type]); 951 return 0; 952 out_quota_off: 953 ocfs2_disable_quotas(osb); 954 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 955 iput(inode[type]); 956 mlog_errno(status); 957 return status; 958 } 959 960 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 961 { 962 int type; 963 struct inode *inode; 964 struct super_block *sb = osb->sb; 965 struct ocfs2_mem_dqinfo *oinfo; 966 967 /* We mostly ignore errors in this function because there's not much 968 * we can do when we see them */ 969 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 970 if (!sb_has_quota_loaded(sb, type)) 971 continue; 972 oinfo = sb_dqinfo(sb, type)->dqi_priv; 973 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 974 inode = igrab(sb->s_dquot.files[type]); 975 /* Turn off quotas. This will remove all dquot structures from 976 * memory and so they will be automatically synced to global 977 * quota files */ 978 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 979 DQUOT_LIMITS_ENABLED); 980 if (!inode) 981 continue; 982 iput(inode); 983 } 984 } 985 986 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 987 { 988 struct dentry *root; 989 int status, sector_size; 990 struct mount_options parsed_options; 991 struct inode *inode = NULL; 992 struct ocfs2_super *osb = NULL; 993 struct buffer_head *bh = NULL; 994 char nodestr[12]; 995 struct ocfs2_blockcheck_stats stats; 996 997 trace_ocfs2_fill_super(sb, data, silent); 998 999 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1000 status = -EINVAL; 1001 goto read_super_error; 1002 } 1003 1004 /* probe for superblock */ 1005 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1006 if (status < 0) { 1007 mlog(ML_ERROR, "superblock probe failed!\n"); 1008 goto read_super_error; 1009 } 1010 1011 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1012 osb = OCFS2_SB(sb); 1013 if (status < 0) { 1014 mlog_errno(status); 1015 goto read_super_error; 1016 } 1017 brelse(bh); 1018 bh = NULL; 1019 1020 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1021 status = -EINVAL; 1022 goto read_super_error; 1023 } 1024 osb->s_mount_opt = parsed_options.mount_opt; 1025 osb->s_atime_quantum = parsed_options.atime_quantum; 1026 osb->preferred_slot = parsed_options.slot; 1027 osb->osb_commit_interval = parsed_options.commit_interval; 1028 1029 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1030 osb->osb_resv_level = parsed_options.resv_level; 1031 osb->osb_dir_resv_level = parsed_options.resv_level; 1032 if (parsed_options.dir_resv_level == -1) 1033 osb->osb_dir_resv_level = parsed_options.resv_level; 1034 else 1035 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1036 1037 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1038 if (status) 1039 goto read_super_error; 1040 1041 sb->s_magic = OCFS2_SUPER_MAGIC; 1042 1043 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) | 1044 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0); 1045 1046 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY, 1047 * heartbeat=none */ 1048 if (bdev_read_only(sb->s_bdev)) { 1049 if (!sb_rdonly(sb)) { 1050 status = -EACCES; 1051 mlog(ML_ERROR, "Readonly device detected but readonly " 1052 "mount was not specified.\n"); 1053 goto read_super_error; 1054 } 1055 1056 /* You should not be able to start a local heartbeat 1057 * on a readonly device. */ 1058 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1059 status = -EROFS; 1060 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1061 "device.\n"); 1062 goto read_super_error; 1063 } 1064 1065 status = ocfs2_check_journals_nolocks(osb); 1066 if (status < 0) { 1067 if (status == -EROFS) 1068 mlog(ML_ERROR, "Recovery required on readonly " 1069 "file system, but write access is " 1070 "unavailable.\n"); 1071 else 1072 mlog_errno(status); 1073 goto read_super_error; 1074 } 1075 1076 ocfs2_set_ro_flag(osb, 1); 1077 1078 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1079 "Cluster services will not be used for this mount. " 1080 "Recovery will be skipped.\n", osb->dev_str); 1081 } 1082 1083 if (!ocfs2_is_hard_readonly(osb)) { 1084 if (sb_rdonly(sb)) 1085 ocfs2_set_ro_flag(osb, 0); 1086 } 1087 1088 status = ocfs2_verify_heartbeat(osb); 1089 if (status < 0) { 1090 mlog_errno(status); 1091 goto read_super_error; 1092 } 1093 1094 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1095 ocfs2_debugfs_root); 1096 if (!osb->osb_debug_root) { 1097 status = -EINVAL; 1098 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1099 goto read_super_error; 1100 } 1101 1102 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1103 osb->osb_debug_root, 1104 osb, 1105 &ocfs2_osb_debug_fops); 1106 if (!osb->osb_ctxt) { 1107 status = -EINVAL; 1108 mlog_errno(status); 1109 goto read_super_error; 1110 } 1111 1112 if (ocfs2_meta_ecc(osb)) { 1113 status = ocfs2_blockcheck_stats_debugfs_install( 1114 &osb->osb_ecc_stats, 1115 osb->osb_debug_root); 1116 if (status) { 1117 mlog(ML_ERROR, 1118 "Unable to create blockcheck statistics " 1119 "files\n"); 1120 goto read_super_error; 1121 } 1122 } 1123 1124 status = ocfs2_mount_volume(sb); 1125 if (status < 0) 1126 goto read_super_error; 1127 1128 if (osb->root_inode) 1129 inode = igrab(osb->root_inode); 1130 1131 if (!inode) { 1132 status = -EIO; 1133 mlog_errno(status); 1134 goto read_super_error; 1135 } 1136 1137 root = d_make_root(inode); 1138 if (!root) { 1139 status = -ENOMEM; 1140 mlog_errno(status); 1141 goto read_super_error; 1142 } 1143 1144 sb->s_root = root; 1145 1146 ocfs2_complete_mount_recovery(osb); 1147 1148 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL, 1149 &ocfs2_kset->kobj); 1150 if (!osb->osb_dev_kset) { 1151 status = -ENOMEM; 1152 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id); 1153 goto read_super_error; 1154 } 1155 1156 /* Create filecheck sysfs related directories/files at 1157 * /sys/fs/ocfs2/<devname>/filecheck */ 1158 if (ocfs2_filecheck_create_sysfs(osb)) { 1159 status = -ENOMEM; 1160 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at " 1161 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id); 1162 goto read_super_error; 1163 } 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_rdonly(sb)) { 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 return status; 1204 1205 read_super_error: 1206 brelse(bh); 1207 1208 if (status) 1209 mlog_errno(status); 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 return status; 1218 } 1219 1220 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1221 int flags, 1222 const char *dev_name, 1223 void *data) 1224 { 1225 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1226 } 1227 1228 static struct file_system_type ocfs2_fs_type = { 1229 .owner = THIS_MODULE, 1230 .name = "ocfs2", 1231 .mount = ocfs2_mount, 1232 .kill_sb = kill_block_super, 1233 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1234 .next = NULL 1235 }; 1236 MODULE_ALIAS_FS("ocfs2"); 1237 1238 static int ocfs2_check_set_options(struct super_block *sb, 1239 struct mount_options *options) 1240 { 1241 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1242 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1243 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1244 mlog(ML_ERROR, "User quotas were requested, but this " 1245 "filesystem does not have the feature enabled.\n"); 1246 return 0; 1247 } 1248 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1249 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1250 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1251 mlog(ML_ERROR, "Group quotas were requested, but this " 1252 "filesystem does not have the feature enabled.\n"); 1253 return 0; 1254 } 1255 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1256 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1257 mlog(ML_ERROR, "ACL support requested but extended attributes " 1258 "feature is not enabled\n"); 1259 return 0; 1260 } 1261 /* No ACL setting specified? Use XATTR feature... */ 1262 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1263 OCFS2_MOUNT_NO_POSIX_ACL))) { 1264 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1265 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1266 else 1267 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1268 } 1269 return 1; 1270 } 1271 1272 static int ocfs2_parse_options(struct super_block *sb, 1273 char *options, 1274 struct mount_options *mopt, 1275 int is_remount) 1276 { 1277 int status, user_stack = 0; 1278 char *p; 1279 u32 tmp; 1280 int token, option; 1281 substring_t args[MAX_OPT_ARGS]; 1282 1283 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1284 1285 mopt->commit_interval = 0; 1286 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1287 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1288 mopt->slot = OCFS2_INVALID_SLOT; 1289 mopt->localalloc_opt = -1; 1290 mopt->cluster_stack[0] = '\0'; 1291 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1292 mopt->dir_resv_level = -1; 1293 1294 if (!options) { 1295 status = 1; 1296 goto bail; 1297 } 1298 1299 while ((p = strsep(&options, ",")) != NULL) { 1300 if (!*p) 1301 continue; 1302 1303 token = match_token(p, tokens, args); 1304 switch (token) { 1305 case Opt_hb_local: 1306 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1307 break; 1308 case Opt_hb_none: 1309 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1310 break; 1311 case Opt_hb_global: 1312 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1313 break; 1314 case Opt_barrier: 1315 if (match_int(&args[0], &option)) { 1316 status = 0; 1317 goto bail; 1318 } 1319 if (option) 1320 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1321 else 1322 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1323 break; 1324 case Opt_intr: 1325 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1326 break; 1327 case Opt_nointr: 1328 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1329 break; 1330 case Opt_err_panic: 1331 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1332 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1333 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1334 break; 1335 case Opt_err_ro: 1336 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1337 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1338 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1339 break; 1340 case Opt_err_cont: 1341 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1342 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1343 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1344 break; 1345 case Opt_data_ordered: 1346 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1347 break; 1348 case Opt_data_writeback: 1349 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1350 break; 1351 case Opt_user_xattr: 1352 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1353 break; 1354 case Opt_nouser_xattr: 1355 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1356 break; 1357 case Opt_atime_quantum: 1358 if (match_int(&args[0], &option)) { 1359 status = 0; 1360 goto bail; 1361 } 1362 if (option >= 0) 1363 mopt->atime_quantum = option; 1364 break; 1365 case Opt_slot: 1366 if (match_int(&args[0], &option)) { 1367 status = 0; 1368 goto bail; 1369 } 1370 if (option) 1371 mopt->slot = (s16)option; 1372 break; 1373 case Opt_commit: 1374 if (match_int(&args[0], &option)) { 1375 status = 0; 1376 goto bail; 1377 } 1378 if (option < 0) 1379 return 0; 1380 if (option == 0) 1381 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1382 mopt->commit_interval = HZ * option; 1383 break; 1384 case Opt_localalloc: 1385 if (match_int(&args[0], &option)) { 1386 status = 0; 1387 goto bail; 1388 } 1389 if (option >= 0) 1390 mopt->localalloc_opt = option; 1391 break; 1392 case Opt_localflocks: 1393 /* 1394 * Changing this during remount could race 1395 * flock() requests, or "unbalance" existing 1396 * ones (e.g., a lock is taken in one mode but 1397 * dropped in the other). If users care enough 1398 * to flip locking modes during remount, we 1399 * could add a "local" flag to individual 1400 * flock structures for proper tracking of 1401 * state. 1402 */ 1403 if (!is_remount) 1404 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1405 break; 1406 case Opt_stack: 1407 /* Check both that the option we were passed 1408 * is of the right length and that it is a proper 1409 * string of the right length. 1410 */ 1411 if (((args[0].to - args[0].from) != 1412 OCFS2_STACK_LABEL_LEN) || 1413 (strnlen(args[0].from, 1414 OCFS2_STACK_LABEL_LEN) != 1415 OCFS2_STACK_LABEL_LEN)) { 1416 mlog(ML_ERROR, 1417 "Invalid cluster_stack option\n"); 1418 status = 0; 1419 goto bail; 1420 } 1421 memcpy(mopt->cluster_stack, args[0].from, 1422 OCFS2_STACK_LABEL_LEN); 1423 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1424 /* 1425 * Open code the memcmp here as we don't have 1426 * an osb to pass to 1427 * ocfs2_userspace_stack(). 1428 */ 1429 if (memcmp(mopt->cluster_stack, 1430 OCFS2_CLASSIC_CLUSTER_STACK, 1431 OCFS2_STACK_LABEL_LEN)) 1432 user_stack = 1; 1433 break; 1434 case Opt_inode64: 1435 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1436 break; 1437 case Opt_usrquota: 1438 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1439 break; 1440 case Opt_grpquota: 1441 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1442 break; 1443 case Opt_coherency_buffered: 1444 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1445 break; 1446 case Opt_coherency_full: 1447 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1448 break; 1449 case Opt_acl: 1450 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1451 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1452 break; 1453 case Opt_noacl: 1454 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1455 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1456 break; 1457 case Opt_resv_level: 1458 if (is_remount) 1459 break; 1460 if (match_int(&args[0], &option)) { 1461 status = 0; 1462 goto bail; 1463 } 1464 if (option >= OCFS2_MIN_RESV_LEVEL && 1465 option < OCFS2_MAX_RESV_LEVEL) 1466 mopt->resv_level = option; 1467 break; 1468 case Opt_dir_resv_level: 1469 if (is_remount) 1470 break; 1471 if (match_int(&args[0], &option)) { 1472 status = 0; 1473 goto bail; 1474 } 1475 if (option >= OCFS2_MIN_RESV_LEVEL && 1476 option < OCFS2_MAX_RESV_LEVEL) 1477 mopt->dir_resv_level = option; 1478 break; 1479 case Opt_journal_async_commit: 1480 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1481 break; 1482 default: 1483 mlog(ML_ERROR, 1484 "Unrecognized mount option \"%s\" " 1485 "or missing value\n", p); 1486 status = 0; 1487 goto bail; 1488 } 1489 } 1490 1491 if (user_stack == 0) { 1492 /* Ensure only one heartbeat mode */ 1493 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1494 OCFS2_MOUNT_HB_GLOBAL | 1495 OCFS2_MOUNT_HB_NONE); 1496 if (hweight32(tmp) != 1) { 1497 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1498 status = 0; 1499 goto bail; 1500 } 1501 } 1502 1503 status = 1; 1504 1505 bail: 1506 return status; 1507 } 1508 1509 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1510 { 1511 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1512 unsigned long opts = osb->s_mount_opt; 1513 unsigned int local_alloc_megs; 1514 1515 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1516 seq_printf(s, ",_netdev"); 1517 if (opts & OCFS2_MOUNT_HB_LOCAL) 1518 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1519 else 1520 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1521 } else 1522 seq_printf(s, ",%s", OCFS2_HB_NONE); 1523 1524 if (opts & OCFS2_MOUNT_NOINTR) 1525 seq_printf(s, ",nointr"); 1526 1527 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1528 seq_printf(s, ",data=writeback"); 1529 else 1530 seq_printf(s, ",data=ordered"); 1531 1532 if (opts & OCFS2_MOUNT_BARRIER) 1533 seq_printf(s, ",barrier=1"); 1534 1535 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1536 seq_printf(s, ",errors=panic"); 1537 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1538 seq_printf(s, ",errors=continue"); 1539 else 1540 seq_printf(s, ",errors=remount-ro"); 1541 1542 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1543 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1544 1545 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1546 1547 if (osb->osb_commit_interval) 1548 seq_printf(s, ",commit=%u", 1549 (unsigned) (osb->osb_commit_interval / HZ)); 1550 1551 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1552 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1553 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1554 1555 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1556 seq_printf(s, ",localflocks,"); 1557 1558 if (osb->osb_cluster_stack[0]) 1559 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1560 OCFS2_STACK_LABEL_LEN); 1561 if (opts & OCFS2_MOUNT_USRQUOTA) 1562 seq_printf(s, ",usrquota"); 1563 if (opts & OCFS2_MOUNT_GRPQUOTA) 1564 seq_printf(s, ",grpquota"); 1565 1566 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1567 seq_printf(s, ",coherency=buffered"); 1568 else 1569 seq_printf(s, ",coherency=full"); 1570 1571 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1572 seq_printf(s, ",nouser_xattr"); 1573 else 1574 seq_printf(s, ",user_xattr"); 1575 1576 if (opts & OCFS2_MOUNT_INODE64) 1577 seq_printf(s, ",inode64"); 1578 1579 if (opts & OCFS2_MOUNT_POSIX_ACL) 1580 seq_printf(s, ",acl"); 1581 else 1582 seq_printf(s, ",noacl"); 1583 1584 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1585 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1586 1587 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1588 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1589 1590 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1591 seq_printf(s, ",journal_async_commit"); 1592 1593 return 0; 1594 } 1595 1596 static int __init ocfs2_init(void) 1597 { 1598 int status; 1599 1600 status = init_ocfs2_uptodate_cache(); 1601 if (status < 0) 1602 goto out1; 1603 1604 status = ocfs2_initialize_mem_caches(); 1605 if (status < 0) 1606 goto out2; 1607 1608 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1609 if (!ocfs2_debugfs_root) { 1610 status = -ENOMEM; 1611 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1612 goto out3; 1613 } 1614 1615 ocfs2_set_locking_protocol(); 1616 1617 status = register_quota_format(&ocfs2_quota_format); 1618 if (status < 0) 1619 goto out3; 1620 status = register_filesystem(&ocfs2_fs_type); 1621 if (!status) 1622 return 0; 1623 1624 unregister_quota_format(&ocfs2_quota_format); 1625 out3: 1626 debugfs_remove(ocfs2_debugfs_root); 1627 ocfs2_free_mem_caches(); 1628 out2: 1629 exit_ocfs2_uptodate_cache(); 1630 out1: 1631 mlog_errno(status); 1632 return status; 1633 } 1634 1635 static void __exit ocfs2_exit(void) 1636 { 1637 unregister_quota_format(&ocfs2_quota_format); 1638 1639 debugfs_remove(ocfs2_debugfs_root); 1640 1641 ocfs2_free_mem_caches(); 1642 1643 unregister_filesystem(&ocfs2_fs_type); 1644 1645 exit_ocfs2_uptodate_cache(); 1646 } 1647 1648 static void ocfs2_put_super(struct super_block *sb) 1649 { 1650 trace_ocfs2_put_super(sb); 1651 1652 ocfs2_sync_blockdev(sb); 1653 ocfs2_dismount_volume(sb, 0); 1654 } 1655 1656 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1657 { 1658 struct ocfs2_super *osb; 1659 u32 numbits, freebits; 1660 int status; 1661 struct ocfs2_dinode *bm_lock; 1662 struct buffer_head *bh = NULL; 1663 struct inode *inode = NULL; 1664 1665 trace_ocfs2_statfs(dentry->d_sb, buf); 1666 1667 osb = OCFS2_SB(dentry->d_sb); 1668 1669 inode = ocfs2_get_system_file_inode(osb, 1670 GLOBAL_BITMAP_SYSTEM_INODE, 1671 OCFS2_INVALID_SLOT); 1672 if (!inode) { 1673 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1674 status = -EIO; 1675 goto bail; 1676 } 1677 1678 status = ocfs2_inode_lock(inode, &bh, 0); 1679 if (status < 0) { 1680 mlog_errno(status); 1681 goto bail; 1682 } 1683 1684 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1685 1686 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1687 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1688 1689 buf->f_type = OCFS2_SUPER_MAGIC; 1690 buf->f_bsize = dentry->d_sb->s_blocksize; 1691 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1692 buf->f_blocks = ((sector_t) numbits) * 1693 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1694 buf->f_bfree = ((sector_t) freebits) * 1695 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1696 buf->f_bavail = buf->f_bfree; 1697 buf->f_files = numbits; 1698 buf->f_ffree = freebits; 1699 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1700 & 0xFFFFFFFFUL; 1701 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1702 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1703 1704 brelse(bh); 1705 1706 ocfs2_inode_unlock(inode, 0); 1707 status = 0; 1708 bail: 1709 iput(inode); 1710 1711 if (status) 1712 mlog_errno(status); 1713 1714 return status; 1715 } 1716 1717 static void ocfs2_inode_init_once(void *data) 1718 { 1719 struct ocfs2_inode_info *oi = data; 1720 1721 oi->ip_flags = 0; 1722 oi->ip_open_count = 0; 1723 spin_lock_init(&oi->ip_lock); 1724 ocfs2_extent_map_init(&oi->vfs_inode); 1725 INIT_LIST_HEAD(&oi->ip_io_markers); 1726 INIT_LIST_HEAD(&oi->ip_unwritten_list); 1727 oi->ip_dir_start_lookup = 0; 1728 init_rwsem(&oi->ip_alloc_sem); 1729 init_rwsem(&oi->ip_xattr_sem); 1730 mutex_init(&oi->ip_io_mutex); 1731 1732 oi->ip_blkno = 0ULL; 1733 oi->ip_clusters = 0; 1734 1735 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1736 1737 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1738 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1739 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1740 1741 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1742 &ocfs2_inode_caching_ops); 1743 1744 inode_init_once(&oi->vfs_inode); 1745 } 1746 1747 static int ocfs2_initialize_mem_caches(void) 1748 { 1749 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1750 sizeof(struct ocfs2_inode_info), 1751 0, 1752 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1753 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1754 ocfs2_inode_init_once); 1755 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1756 sizeof(struct ocfs2_dquot), 1757 0, 1758 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1759 SLAB_MEM_SPREAD), 1760 NULL); 1761 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1762 sizeof(struct ocfs2_quota_chunk), 1763 0, 1764 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1765 NULL); 1766 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1767 !ocfs2_qf_chunk_cachep) { 1768 kmem_cache_destroy(ocfs2_inode_cachep); 1769 kmem_cache_destroy(ocfs2_dquot_cachep); 1770 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1771 return -ENOMEM; 1772 } 1773 1774 return 0; 1775 } 1776 1777 static void ocfs2_free_mem_caches(void) 1778 { 1779 /* 1780 * Make sure all delayed rcu free inodes are flushed before we 1781 * destroy cache. 1782 */ 1783 rcu_barrier(); 1784 kmem_cache_destroy(ocfs2_inode_cachep); 1785 ocfs2_inode_cachep = NULL; 1786 1787 kmem_cache_destroy(ocfs2_dquot_cachep); 1788 ocfs2_dquot_cachep = NULL; 1789 1790 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1791 ocfs2_qf_chunk_cachep = NULL; 1792 } 1793 1794 static int ocfs2_get_sector(struct super_block *sb, 1795 struct buffer_head **bh, 1796 int block, 1797 int sect_size) 1798 { 1799 if (!sb_set_blocksize(sb, sect_size)) { 1800 mlog(ML_ERROR, "unable to set blocksize\n"); 1801 return -EIO; 1802 } 1803 1804 *bh = sb_getblk(sb, block); 1805 if (!*bh) { 1806 mlog_errno(-ENOMEM); 1807 return -ENOMEM; 1808 } 1809 lock_buffer(*bh); 1810 if (!buffer_dirty(*bh)) 1811 clear_buffer_uptodate(*bh); 1812 unlock_buffer(*bh); 1813 ll_rw_block(REQ_OP_READ, 0, 1, bh); 1814 wait_on_buffer(*bh); 1815 if (!buffer_uptodate(*bh)) { 1816 mlog_errno(-EIO); 1817 brelse(*bh); 1818 *bh = NULL; 1819 return -EIO; 1820 } 1821 1822 return 0; 1823 } 1824 1825 static int ocfs2_mount_volume(struct super_block *sb) 1826 { 1827 int status = 0; 1828 int unlock_super = 0; 1829 struct ocfs2_super *osb = OCFS2_SB(sb); 1830 1831 if (ocfs2_is_hard_readonly(osb)) 1832 goto leave; 1833 1834 mutex_init(&osb->obs_trim_fs_mutex); 1835 1836 status = ocfs2_dlm_init(osb); 1837 if (status < 0) { 1838 mlog_errno(status); 1839 if (status == -EBADR && ocfs2_userspace_stack(osb)) 1840 mlog(ML_ERROR, "couldn't mount because cluster name on" 1841 " disk does not match the running cluster name.\n"); 1842 goto leave; 1843 } 1844 1845 status = ocfs2_super_lock(osb, 1); 1846 if (status < 0) { 1847 mlog_errno(status); 1848 goto leave; 1849 } 1850 unlock_super = 1; 1851 1852 /* This will load up the node map and add ourselves to it. */ 1853 status = ocfs2_find_slot(osb); 1854 if (status < 0) { 1855 mlog_errno(status); 1856 goto leave; 1857 } 1858 1859 /* load all node-local system inodes */ 1860 status = ocfs2_init_local_system_inodes(osb); 1861 if (status < 0) { 1862 mlog_errno(status); 1863 goto leave; 1864 } 1865 1866 status = ocfs2_check_volume(osb); 1867 if (status < 0) { 1868 mlog_errno(status); 1869 goto leave; 1870 } 1871 1872 status = ocfs2_truncate_log_init(osb); 1873 if (status < 0) 1874 mlog_errno(status); 1875 1876 leave: 1877 if (unlock_super) 1878 ocfs2_super_unlock(osb, 1); 1879 1880 return status; 1881 } 1882 1883 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1884 { 1885 int tmp, hangup_needed = 0; 1886 struct ocfs2_super *osb = NULL; 1887 char nodestr[12]; 1888 1889 trace_ocfs2_dismount_volume(sb); 1890 1891 BUG_ON(!sb); 1892 osb = OCFS2_SB(sb); 1893 BUG_ON(!osb); 1894 1895 /* Remove file check sysfs related directores/files, 1896 * and wait for the pending file check operations */ 1897 ocfs2_filecheck_remove_sysfs(osb); 1898 1899 kset_unregister(osb->osb_dev_kset); 1900 1901 debugfs_remove(osb->osb_ctxt); 1902 1903 /* Orphan scan should be stopped as early as possible */ 1904 ocfs2_orphan_scan_stop(osb); 1905 1906 ocfs2_disable_quotas(osb); 1907 1908 /* All dquots should be freed by now */ 1909 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1910 /* Wait for worker to be done with the work structure in osb */ 1911 cancel_work_sync(&osb->dquot_drop_work); 1912 1913 ocfs2_shutdown_local_alloc(osb); 1914 1915 ocfs2_truncate_log_shutdown(osb); 1916 1917 /* This will disable recovery and flush any recovery work. */ 1918 ocfs2_recovery_exit(osb); 1919 1920 ocfs2_journal_shutdown(osb); 1921 1922 ocfs2_sync_blockdev(sb); 1923 1924 ocfs2_purge_refcount_trees(osb); 1925 1926 /* No cluster connection means we've failed during mount, so skip 1927 * all the steps which depended on that to complete. */ 1928 if (osb->cconn) { 1929 tmp = ocfs2_super_lock(osb, 1); 1930 if (tmp < 0) { 1931 mlog_errno(tmp); 1932 return; 1933 } 1934 } 1935 1936 if (osb->slot_num != OCFS2_INVALID_SLOT) 1937 ocfs2_put_slot(osb); 1938 1939 if (osb->cconn) 1940 ocfs2_super_unlock(osb, 1); 1941 1942 ocfs2_release_system_inodes(osb); 1943 1944 /* 1945 * If we're dismounting due to mount error, mount.ocfs2 will clean 1946 * up heartbeat. If we're a local mount, there is no heartbeat. 1947 * If we failed before we got a uuid_str yet, we can't stop 1948 * heartbeat. Otherwise, do it. 1949 */ 1950 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1951 !ocfs2_is_hard_readonly(osb)) 1952 hangup_needed = 1; 1953 1954 if (osb->cconn) 1955 ocfs2_dlm_shutdown(osb, hangup_needed); 1956 1957 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1958 debugfs_remove(osb->osb_debug_root); 1959 1960 if (hangup_needed) 1961 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1962 1963 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1964 1965 if (ocfs2_mount_local(osb)) 1966 snprintf(nodestr, sizeof(nodestr), "local"); 1967 else 1968 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1969 1970 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1971 osb->dev_str, nodestr); 1972 1973 ocfs2_delete_osb(osb); 1974 kfree(osb); 1975 sb->s_dev = 0; 1976 sb->s_fs_info = NULL; 1977 } 1978 1979 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1980 unsigned uuid_bytes) 1981 { 1982 int i, ret; 1983 char *ptr; 1984 1985 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1986 1987 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1988 if (osb->uuid_str == NULL) 1989 return -ENOMEM; 1990 1991 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1992 /* print with null */ 1993 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1994 if (ret != 2) /* drop super cleans up */ 1995 return -EINVAL; 1996 /* then only advance past the last char */ 1997 ptr += 2; 1998 } 1999 2000 return 0; 2001 } 2002 2003 /* Make sure entire volume is addressable by our journal. Requires 2004 osb_clusters_at_boot to be valid and for the journal to have been 2005 initialized by ocfs2_journal_init(). */ 2006 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2007 { 2008 int status = 0; 2009 u64 max_block = 2010 ocfs2_clusters_to_blocks(osb->sb, 2011 osb->osb_clusters_at_boot) - 1; 2012 2013 /* 32-bit block number is always OK. */ 2014 if (max_block <= (u32)~0ULL) 2015 goto out; 2016 2017 /* Volume is "huge", so see if our journal is new enough to 2018 support it. */ 2019 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2020 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2021 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2022 JBD2_FEATURE_INCOMPAT_64BIT))) { 2023 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2024 "Enable the 'block64' journal option with tunefs.ocfs2"); 2025 status = -EFBIG; 2026 goto out; 2027 } 2028 2029 out: 2030 return status; 2031 } 2032 2033 static int ocfs2_initialize_super(struct super_block *sb, 2034 struct buffer_head *bh, 2035 int sector_size, 2036 struct ocfs2_blockcheck_stats *stats) 2037 { 2038 int status; 2039 int i, cbits, bbits; 2040 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2041 struct inode *inode = NULL; 2042 struct ocfs2_journal *journal; 2043 struct ocfs2_super *osb; 2044 u64 total_blocks; 2045 2046 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2047 if (!osb) { 2048 status = -ENOMEM; 2049 mlog_errno(status); 2050 goto bail; 2051 } 2052 2053 sb->s_fs_info = osb; 2054 sb->s_op = &ocfs2_sops; 2055 sb->s_d_op = &ocfs2_dentry_ops; 2056 sb->s_export_op = &ocfs2_export_ops; 2057 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2058 sb->dq_op = &ocfs2_quota_operations; 2059 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2060 sb->s_xattr = ocfs2_xattr_handlers; 2061 sb->s_time_gran = 1; 2062 sb->s_flags |= SB_NOATIME; 2063 /* this is needed to support O_LARGEFILE */ 2064 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2065 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2066 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2067 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid, 2068 sizeof(di->id2.i_super.s_uuid)); 2069 2070 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2071 2072 for (i = 0; i < 3; i++) 2073 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2074 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2075 2076 osb->sb = sb; 2077 osb->s_sectsize_bits = blksize_bits(sector_size); 2078 BUG_ON(!osb->s_sectsize_bits); 2079 2080 spin_lock_init(&osb->dc_task_lock); 2081 init_waitqueue_head(&osb->dc_event); 2082 osb->dc_work_sequence = 0; 2083 osb->dc_wake_sequence = 0; 2084 INIT_LIST_HEAD(&osb->blocked_lock_list); 2085 osb->blocked_lock_count = 0; 2086 spin_lock_init(&osb->osb_lock); 2087 spin_lock_init(&osb->osb_xattr_lock); 2088 ocfs2_init_steal_slots(osb); 2089 2090 mutex_init(&osb->system_file_mutex); 2091 2092 atomic_set(&osb->alloc_stats.moves, 0); 2093 atomic_set(&osb->alloc_stats.local_data, 0); 2094 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2095 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2096 atomic_set(&osb->alloc_stats.bg_extends, 0); 2097 2098 /* Copy the blockcheck stats from the superblock probe */ 2099 osb->osb_ecc_stats = *stats; 2100 2101 ocfs2_init_node_maps(osb); 2102 2103 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2104 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2105 2106 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2107 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2108 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2109 osb->max_slots); 2110 status = -EINVAL; 2111 goto bail; 2112 } 2113 2114 ocfs2_orphan_scan_init(osb); 2115 2116 status = ocfs2_recovery_init(osb); 2117 if (status) { 2118 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2119 mlog_errno(status); 2120 goto bail; 2121 } 2122 2123 init_waitqueue_head(&osb->checkpoint_event); 2124 2125 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2126 2127 osb->slot_num = OCFS2_INVALID_SLOT; 2128 2129 osb->s_xattr_inline_size = le16_to_cpu( 2130 di->id2.i_super.s_xattr_inline_size); 2131 2132 osb->local_alloc_state = OCFS2_LA_UNUSED; 2133 osb->local_alloc_bh = NULL; 2134 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2135 2136 init_waitqueue_head(&osb->osb_mount_event); 2137 2138 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2139 if (status) { 2140 mlog_errno(status); 2141 goto bail; 2142 } 2143 2144 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2145 if (!osb->vol_label) { 2146 mlog(ML_ERROR, "unable to alloc vol label\n"); 2147 status = -ENOMEM; 2148 goto bail; 2149 } 2150 2151 osb->slot_recovery_generations = 2152 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2153 GFP_KERNEL); 2154 if (!osb->slot_recovery_generations) { 2155 status = -ENOMEM; 2156 mlog_errno(status); 2157 goto bail; 2158 } 2159 2160 init_waitqueue_head(&osb->osb_wipe_event); 2161 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2162 sizeof(*osb->osb_orphan_wipes), 2163 GFP_KERNEL); 2164 if (!osb->osb_orphan_wipes) { 2165 status = -ENOMEM; 2166 mlog_errno(status); 2167 goto bail; 2168 } 2169 2170 osb->osb_rf_lock_tree = RB_ROOT; 2171 2172 osb->s_feature_compat = 2173 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2174 osb->s_feature_ro_compat = 2175 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2176 osb->s_feature_incompat = 2177 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2178 2179 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2180 mlog(ML_ERROR, "couldn't mount because of unsupported " 2181 "optional features (%x).\n", i); 2182 status = -EINVAL; 2183 goto bail; 2184 } 2185 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2186 mlog(ML_ERROR, "couldn't mount RDWR because of " 2187 "unsupported optional features (%x).\n", i); 2188 status = -EINVAL; 2189 goto bail; 2190 } 2191 2192 if (ocfs2_clusterinfo_valid(osb)) { 2193 osb->osb_stackflags = 2194 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2195 strlcpy(osb->osb_cluster_stack, 2196 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2197 OCFS2_STACK_LABEL_LEN + 1); 2198 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2199 mlog(ML_ERROR, 2200 "couldn't mount because of an invalid " 2201 "cluster stack label (%s) \n", 2202 osb->osb_cluster_stack); 2203 status = -EINVAL; 2204 goto bail; 2205 } 2206 strlcpy(osb->osb_cluster_name, 2207 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2208 OCFS2_CLUSTER_NAME_LEN + 1); 2209 } else { 2210 /* The empty string is identical with classic tools that 2211 * don't know about s_cluster_info. */ 2212 osb->osb_cluster_stack[0] = '\0'; 2213 } 2214 2215 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2216 2217 /* FIXME 2218 * This should be done in ocfs2_journal_init(), but unknown 2219 * ordering issues will cause the filesystem to crash. 2220 * If anyone wants to figure out what part of the code 2221 * refers to osb->journal before ocfs2_journal_init() is run, 2222 * be my guest. 2223 */ 2224 /* initialize our journal structure */ 2225 2226 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2227 if (!journal) { 2228 mlog(ML_ERROR, "unable to alloc journal\n"); 2229 status = -ENOMEM; 2230 goto bail; 2231 } 2232 osb->journal = journal; 2233 journal->j_osb = osb; 2234 2235 atomic_set(&journal->j_num_trans, 0); 2236 init_rwsem(&journal->j_trans_barrier); 2237 init_waitqueue_head(&journal->j_checkpointed); 2238 spin_lock_init(&journal->j_lock); 2239 journal->j_trans_id = (unsigned long) 1; 2240 INIT_LIST_HEAD(&journal->j_la_cleanups); 2241 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2242 journal->j_state = OCFS2_JOURNAL_FREE; 2243 2244 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2245 init_llist_head(&osb->dquot_drop_list); 2246 2247 /* get some pseudo constants for clustersize bits */ 2248 osb->s_clustersize_bits = 2249 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2250 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2251 2252 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2253 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2254 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2255 osb->s_clustersize); 2256 status = -EINVAL; 2257 goto bail; 2258 } 2259 2260 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2261 le32_to_cpu(di->i_clusters)); 2262 2263 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2264 total_blocks); 2265 if (status) { 2266 mlog(ML_ERROR, "Volume too large " 2267 "to mount safely on this system"); 2268 status = -EFBIG; 2269 goto bail; 2270 } 2271 2272 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2273 sizeof(di->id2.i_super.s_uuid))) { 2274 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2275 status = -ENOMEM; 2276 goto bail; 2277 } 2278 2279 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2280 OCFS2_MAX_VOL_LABEL_LEN); 2281 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2282 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2283 osb->first_cluster_group_blkno = 2284 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2285 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2286 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2287 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2288 (unsigned long long)osb->root_blkno, 2289 (unsigned long long)osb->system_dir_blkno, 2290 osb->s_clustersize_bits); 2291 2292 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2293 if (!osb->osb_dlm_debug) { 2294 status = -ENOMEM; 2295 mlog_errno(status); 2296 goto bail; 2297 } 2298 2299 atomic_set(&osb->vol_state, VOLUME_INIT); 2300 2301 /* load root, system_dir, and all global system inodes */ 2302 status = ocfs2_init_global_system_inodes(osb); 2303 if (status < 0) { 2304 mlog_errno(status); 2305 goto bail; 2306 } 2307 2308 /* 2309 * global bitmap 2310 */ 2311 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2312 OCFS2_INVALID_SLOT); 2313 if (!inode) { 2314 status = -EINVAL; 2315 mlog_errno(status); 2316 goto bail; 2317 } 2318 2319 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2320 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2321 iput(inode); 2322 2323 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2324 osb->s_feature_incompat) * 8; 2325 2326 status = ocfs2_init_slot_info(osb); 2327 if (status < 0) { 2328 mlog_errno(status); 2329 goto bail; 2330 } 2331 cleancache_init_shared_fs(sb); 2332 2333 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM); 2334 if (!osb->ocfs2_wq) { 2335 status = -ENOMEM; 2336 mlog_errno(status); 2337 } 2338 2339 bail: 2340 return status; 2341 } 2342 2343 /* 2344 * will return: -EAGAIN if it is ok to keep searching for superblocks 2345 * -EINVAL if there is a bad superblock 2346 * 0 on success 2347 */ 2348 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2349 struct buffer_head *bh, 2350 u32 blksz, 2351 struct ocfs2_blockcheck_stats *stats) 2352 { 2353 int status = -EAGAIN; 2354 2355 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2356 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2357 /* We have to do a raw check of the feature here */ 2358 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2359 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2360 status = ocfs2_block_check_validate(bh->b_data, 2361 bh->b_size, 2362 &di->i_check, 2363 stats); 2364 if (status) 2365 goto out; 2366 } 2367 status = -EINVAL; 2368 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2369 mlog(ML_ERROR, "found superblock with incorrect block " 2370 "size: found %u, should be %u\n", 2371 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2372 blksz); 2373 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2374 OCFS2_MAJOR_REV_LEVEL || 2375 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2376 OCFS2_MINOR_REV_LEVEL) { 2377 mlog(ML_ERROR, "found superblock with bad version: " 2378 "found %u.%u, should be %u.%u\n", 2379 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2380 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2381 OCFS2_MAJOR_REV_LEVEL, 2382 OCFS2_MINOR_REV_LEVEL); 2383 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2384 mlog(ML_ERROR, "bad block number on superblock: " 2385 "found %llu, should be %llu\n", 2386 (unsigned long long)le64_to_cpu(di->i_blkno), 2387 (unsigned long long)bh->b_blocknr); 2388 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2389 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2390 mlog(ML_ERROR, "bad cluster size found: %u\n", 2391 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2392 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2393 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2394 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2395 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2396 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2397 mlog(ML_ERROR, 2398 "Superblock slots found greater than file system " 2399 "maximum: found %u, max %u\n", 2400 le16_to_cpu(di->id2.i_super.s_max_slots), 2401 OCFS2_MAX_SLOTS); 2402 } else { 2403 /* found it! */ 2404 status = 0; 2405 } 2406 } 2407 2408 out: 2409 if (status && status != -EAGAIN) 2410 mlog_errno(status); 2411 return status; 2412 } 2413 2414 static int ocfs2_check_volume(struct ocfs2_super *osb) 2415 { 2416 int status; 2417 int dirty; 2418 int local; 2419 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2420 * recover 2421 * ourselves. */ 2422 2423 /* Init our journal object. */ 2424 status = ocfs2_journal_init(osb->journal, &dirty); 2425 if (status < 0) { 2426 mlog(ML_ERROR, "Could not initialize journal!\n"); 2427 goto finally; 2428 } 2429 2430 /* Now that journal has been initialized, check to make sure 2431 entire volume is addressable. */ 2432 status = ocfs2_journal_addressable(osb); 2433 if (status) 2434 goto finally; 2435 2436 /* If the journal was unmounted cleanly then we don't want to 2437 * recover anything. Otherwise, journal_load will do that 2438 * dirty work for us :) */ 2439 if (!dirty) { 2440 status = ocfs2_journal_wipe(osb->journal, 0); 2441 if (status < 0) { 2442 mlog_errno(status); 2443 goto finally; 2444 } 2445 } else { 2446 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2447 "unmounted cleanly, recovering it.\n", osb->dev_str); 2448 } 2449 2450 local = ocfs2_mount_local(osb); 2451 2452 /* will play back anything left in the journal. */ 2453 status = ocfs2_journal_load(osb->journal, local, dirty); 2454 if (status < 0) { 2455 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2456 goto finally; 2457 } 2458 2459 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2460 jbd2_journal_set_features(osb->journal->j_journal, 2461 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2462 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2463 else 2464 jbd2_journal_clear_features(osb->journal->j_journal, 2465 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2466 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2467 2468 if (dirty) { 2469 /* recover my local alloc if we didn't unmount cleanly. */ 2470 status = ocfs2_begin_local_alloc_recovery(osb, 2471 osb->slot_num, 2472 &local_alloc); 2473 if (status < 0) { 2474 mlog_errno(status); 2475 goto finally; 2476 } 2477 /* we complete the recovery process after we've marked 2478 * ourselves as mounted. */ 2479 } 2480 2481 status = ocfs2_load_local_alloc(osb); 2482 if (status < 0) { 2483 mlog_errno(status); 2484 goto finally; 2485 } 2486 2487 if (dirty) { 2488 /* Recovery will be completed after we've mounted the 2489 * rest of the volume. */ 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 destroy_workqueue(osb->ocfs2_wq); 2528 2529 ocfs2_free_slot_info(osb); 2530 2531 kfree(osb->osb_orphan_wipes); 2532 kfree(osb->slot_recovery_generations); 2533 /* FIXME 2534 * This belongs in journal shutdown, but because we have to 2535 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2536 * we free it here. 2537 */ 2538 kfree(osb->journal); 2539 kfree(osb->local_alloc_copy); 2540 kfree(osb->uuid_str); 2541 kfree(osb->vol_label); 2542 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2543 memset(osb, 0, sizeof(struct ocfs2_super)); 2544 } 2545 2546 /* Depending on the mount option passed, perform one of the following: 2547 * Put OCFS2 into a readonly state (default) 2548 * Return EIO so that only the process errs 2549 * Fix the error as if fsck.ocfs2 -y 2550 * panic 2551 */ 2552 static int ocfs2_handle_error(struct super_block *sb) 2553 { 2554 struct ocfs2_super *osb = OCFS2_SB(sb); 2555 int rv = 0; 2556 2557 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2558 pr_crit("On-disk corruption discovered. " 2559 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2560 2561 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2562 panic("OCFS2: (device %s): panic forced after error\n", 2563 sb->s_id); 2564 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2565 pr_crit("OCFS2: Returning error to the calling process.\n"); 2566 rv = -EIO; 2567 } else { /* default option */ 2568 rv = -EROFS; 2569 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb))) 2570 return rv; 2571 2572 pr_crit("OCFS2: File system is now read-only.\n"); 2573 sb->s_flags |= SB_RDONLY; 2574 ocfs2_set_ro_flag(osb, 0); 2575 } 2576 2577 return rv; 2578 } 2579 2580 int __ocfs2_error(struct super_block *sb, const char *function, 2581 const char *fmt, ...) 2582 { 2583 struct va_format vaf; 2584 va_list args; 2585 2586 va_start(args, fmt); 2587 vaf.fmt = fmt; 2588 vaf.va = &args; 2589 2590 /* Not using mlog here because we want to show the actual 2591 * function the error came from. */ 2592 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2593 sb->s_id, function, &vaf); 2594 2595 va_end(args); 2596 2597 return ocfs2_handle_error(sb); 2598 } 2599 2600 /* Handle critical errors. This is intentionally more drastic than 2601 * ocfs2_handle_error, so we only use for things like journal errors, 2602 * etc. */ 2603 void __ocfs2_abort(struct super_block *sb, const char *function, 2604 const char *fmt, ...) 2605 { 2606 struct va_format vaf; 2607 va_list args; 2608 2609 va_start(args, fmt); 2610 2611 vaf.fmt = fmt; 2612 vaf.va = &args; 2613 2614 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2615 sb->s_id, function, &vaf); 2616 2617 va_end(args); 2618 2619 /* We don't have the cluster support yet to go straight to 2620 * hard readonly in here. Until then, we want to keep 2621 * ocfs2_abort() so that we can at least mark critical 2622 * errors. 2623 * 2624 * TODO: This should abort the journal and alert other nodes 2625 * that our slot needs recovery. */ 2626 2627 /* Force a panic(). This stinks, but it's better than letting 2628 * things continue without having a proper hard readonly 2629 * here. */ 2630 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2631 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2632 ocfs2_handle_error(sb); 2633 } 2634 2635 /* 2636 * Void signal blockers, because in-kernel sigprocmask() only fails 2637 * when SIG_* is wrong. 2638 */ 2639 void ocfs2_block_signals(sigset_t *oldset) 2640 { 2641 int rc; 2642 sigset_t blocked; 2643 2644 sigfillset(&blocked); 2645 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2646 BUG_ON(rc); 2647 } 2648 2649 void ocfs2_unblock_signals(sigset_t *oldset) 2650 { 2651 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2652 BUG_ON(rc); 2653 } 2654 2655 module_init(ocfs2_init); 2656 module_exit(ocfs2_exit); 2657