1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/init.h> 32 #include <linux/random.h> 33 #include <linux/statfs.h> 34 #include <linux/moduleparam.h> 35 #include <linux/blkdev.h> 36 #include <linux/socket.h> 37 #include <linux/inet.h> 38 #include <linux/parser.h> 39 #include <linux/crc32.h> 40 #include <linux/debugfs.h> 41 #include <linux/mount.h> 42 #include <linux/seq_file.h> 43 #include <linux/quotaops.h> 44 #include <linux/cleancache.h> 45 46 #define CREATE_TRACE_POINTS 47 #include "ocfs2_trace.h" 48 49 #include <cluster/masklog.h> 50 51 #include "ocfs2.h" 52 53 /* this should be the only file to include a version 1 header */ 54 #include "ocfs1_fs_compat.h" 55 56 #include "alloc.h" 57 #include "aops.h" 58 #include "blockcheck.h" 59 #include "dlmglue.h" 60 #include "export.h" 61 #include "extent_map.h" 62 #include "heartbeat.h" 63 #include "inode.h" 64 #include "journal.h" 65 #include "localalloc.h" 66 #include "namei.h" 67 #include "slot_map.h" 68 #include "super.h" 69 #include "sysfile.h" 70 #include "uptodate.h" 71 #include "xattr.h" 72 #include "quota.h" 73 #include "refcounttree.h" 74 #include "suballoc.h" 75 76 #include "buffer_head_io.h" 77 78 static struct kmem_cache *ocfs2_inode_cachep; 79 struct kmem_cache *ocfs2_dquot_cachep; 80 struct kmem_cache *ocfs2_qf_chunk_cachep; 81 82 /* OCFS2 needs to schedule several different types of work which 83 * require cluster locking, disk I/O, recovery waits, etc. Since these 84 * types of work tend to be heavy we avoid using the kernel events 85 * workqueue and schedule on our own. */ 86 struct workqueue_struct *ocfs2_wq = NULL; 87 88 static struct dentry *ocfs2_debugfs_root; 89 90 MODULE_AUTHOR("Oracle"); 91 MODULE_LICENSE("GPL"); 92 MODULE_DESCRIPTION("OCFS2 cluster file system"); 93 94 struct mount_options 95 { 96 unsigned long commit_interval; 97 unsigned long mount_opt; 98 unsigned int atime_quantum; 99 signed short slot; 100 int localalloc_opt; 101 unsigned int resv_level; 102 int dir_resv_level; 103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 104 }; 105 106 static int ocfs2_parse_options(struct super_block *sb, char *options, 107 struct mount_options *mopt, 108 int is_remount); 109 static int ocfs2_check_set_options(struct super_block *sb, 110 struct mount_options *options); 111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 112 static void ocfs2_put_super(struct super_block *sb); 113 static int ocfs2_mount_volume(struct super_block *sb); 114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 116 static int ocfs2_initialize_mem_caches(void); 117 static void ocfs2_free_mem_caches(void); 118 static void ocfs2_delete_osb(struct ocfs2_super *osb); 119 120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 121 122 static int ocfs2_sync_fs(struct super_block *sb, int wait); 123 124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 127 static int ocfs2_check_volume(struct ocfs2_super *osb); 128 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 129 struct buffer_head *bh, 130 u32 sectsize, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_initialize_super(struct super_block *sb, 133 struct buffer_head *bh, 134 int sector_size, 135 struct ocfs2_blockcheck_stats *stats); 136 static int ocfs2_get_sector(struct super_block *sb, 137 struct buffer_head **bh, 138 int block, 139 int sect_size); 140 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 141 static void ocfs2_destroy_inode(struct inode *inode); 142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 143 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 144 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 145 146 static struct dquot **ocfs2_get_dquots(struct inode *inode) 147 { 148 return OCFS2_I(inode)->i_dquot; 149 } 150 151 static const struct super_operations ocfs2_sops = { 152 .statfs = ocfs2_statfs, 153 .alloc_inode = ocfs2_alloc_inode, 154 .destroy_inode = ocfs2_destroy_inode, 155 .drop_inode = ocfs2_drop_inode, 156 .evict_inode = ocfs2_evict_inode, 157 .sync_fs = ocfs2_sync_fs, 158 .put_super = ocfs2_put_super, 159 .remount_fs = ocfs2_remount, 160 .show_options = ocfs2_show_options, 161 .quota_read = ocfs2_quota_read, 162 .quota_write = ocfs2_quota_write, 163 .get_dquots = ocfs2_get_dquots, 164 }; 165 166 enum { 167 Opt_barrier, 168 Opt_err_panic, 169 Opt_err_ro, 170 Opt_intr, 171 Opt_nointr, 172 Opt_hb_none, 173 Opt_hb_local, 174 Opt_hb_global, 175 Opt_data_ordered, 176 Opt_data_writeback, 177 Opt_atime_quantum, 178 Opt_slot, 179 Opt_commit, 180 Opt_localalloc, 181 Opt_localflocks, 182 Opt_stack, 183 Opt_user_xattr, 184 Opt_nouser_xattr, 185 Opt_inode64, 186 Opt_acl, 187 Opt_noacl, 188 Opt_usrquota, 189 Opt_grpquota, 190 Opt_coherency_buffered, 191 Opt_coherency_full, 192 Opt_resv_level, 193 Opt_dir_resv_level, 194 Opt_journal_async_commit, 195 Opt_err_cont, 196 Opt_err, 197 }; 198 199 static const match_table_t tokens = { 200 {Opt_barrier, "barrier=%u"}, 201 {Opt_err_panic, "errors=panic"}, 202 {Opt_err_ro, "errors=remount-ro"}, 203 {Opt_intr, "intr"}, 204 {Opt_nointr, "nointr"}, 205 {Opt_hb_none, OCFS2_HB_NONE}, 206 {Opt_hb_local, OCFS2_HB_LOCAL}, 207 {Opt_hb_global, OCFS2_HB_GLOBAL}, 208 {Opt_data_ordered, "data=ordered"}, 209 {Opt_data_writeback, "data=writeback"}, 210 {Opt_atime_quantum, "atime_quantum=%u"}, 211 {Opt_slot, "preferred_slot=%u"}, 212 {Opt_commit, "commit=%u"}, 213 {Opt_localalloc, "localalloc=%d"}, 214 {Opt_localflocks, "localflocks"}, 215 {Opt_stack, "cluster_stack=%s"}, 216 {Opt_user_xattr, "user_xattr"}, 217 {Opt_nouser_xattr, "nouser_xattr"}, 218 {Opt_inode64, "inode64"}, 219 {Opt_acl, "acl"}, 220 {Opt_noacl, "noacl"}, 221 {Opt_usrquota, "usrquota"}, 222 {Opt_grpquota, "grpquota"}, 223 {Opt_coherency_buffered, "coherency=buffered"}, 224 {Opt_coherency_full, "coherency=full"}, 225 {Opt_resv_level, "resv_level=%u"}, 226 {Opt_dir_resv_level, "dir_resv_level=%u"}, 227 {Opt_journal_async_commit, "journal_async_commit"}, 228 {Opt_err_cont, "errors=continue"}, 229 {Opt_err, NULL} 230 }; 231 232 #ifdef CONFIG_DEBUG_FS 233 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 234 { 235 struct ocfs2_cluster_connection *cconn = osb->cconn; 236 struct ocfs2_recovery_map *rm = osb->recovery_map; 237 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 238 int i, out = 0; 239 240 out += snprintf(buf + out, len - out, 241 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 242 "Device", osb->dev_str, osb->uuid_str, 243 osb->fs_generation, osb->vol_label); 244 245 out += snprintf(buf + out, len - out, 246 "%10s => State: %d Flags: 0x%lX\n", "Volume", 247 atomic_read(&osb->vol_state), osb->osb_flags); 248 249 out += snprintf(buf + out, len - out, 250 "%10s => Block: %lu Cluster: %d\n", "Sizes", 251 osb->sb->s_blocksize, osb->s_clustersize); 252 253 out += snprintf(buf + out, len - out, 254 "%10s => Compat: 0x%X Incompat: 0x%X " 255 "ROcompat: 0x%X\n", 256 "Features", osb->s_feature_compat, 257 osb->s_feature_incompat, osb->s_feature_ro_compat); 258 259 out += snprintf(buf + out, len - out, 260 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 261 osb->s_mount_opt, osb->s_atime_quantum); 262 263 if (cconn) { 264 out += snprintf(buf + out, len - out, 265 "%10s => Stack: %s Name: %*s " 266 "Version: %d.%d\n", "Cluster", 267 (*osb->osb_cluster_stack == '\0' ? 268 "o2cb" : osb->osb_cluster_stack), 269 cconn->cc_namelen, cconn->cc_name, 270 cconn->cc_version.pv_major, 271 cconn->cc_version.pv_minor); 272 } 273 274 spin_lock(&osb->dc_task_lock); 275 out += snprintf(buf + out, len - out, 276 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 277 "WorkSeq: %lu\n", "DownCnvt", 278 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 279 osb->blocked_lock_count, osb->dc_wake_sequence, 280 osb->dc_work_sequence); 281 spin_unlock(&osb->dc_task_lock); 282 283 spin_lock(&osb->osb_lock); 284 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 285 "Recovery", 286 (osb->recovery_thread_task ? 287 task_pid_nr(osb->recovery_thread_task) : -1)); 288 if (rm->rm_used == 0) 289 out += snprintf(buf + out, len - out, " None\n"); 290 else { 291 for (i = 0; i < rm->rm_used; i++) 292 out += snprintf(buf + out, len - out, " %d", 293 rm->rm_entries[i]); 294 out += snprintf(buf + out, len - out, "\n"); 295 } 296 spin_unlock(&osb->osb_lock); 297 298 out += snprintf(buf + out, len - out, 299 "%10s => Pid: %d Interval: %lu\n", "Commit", 300 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 301 osb->osb_commit_interval); 302 303 out += snprintf(buf + out, len - out, 304 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 305 "Journal", osb->journal->j_state, 306 osb->journal->j_trans_id, 307 atomic_read(&osb->journal->j_num_trans)); 308 309 out += snprintf(buf + out, len - out, 310 "%10s => GlobalAllocs: %d LocalAllocs: %d " 311 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 312 "Stats", 313 atomic_read(&osb->alloc_stats.bitmap_data), 314 atomic_read(&osb->alloc_stats.local_data), 315 atomic_read(&osb->alloc_stats.bg_allocs), 316 atomic_read(&osb->alloc_stats.moves), 317 atomic_read(&osb->alloc_stats.bg_extends)); 318 319 out += snprintf(buf + out, len - out, 320 "%10s => State: %u Descriptor: %llu Size: %u bits " 321 "Default: %u bits\n", 322 "LocalAlloc", osb->local_alloc_state, 323 (unsigned long long)osb->la_last_gd, 324 osb->local_alloc_bits, osb->local_alloc_default_bits); 325 326 spin_lock(&osb->osb_lock); 327 out += snprintf(buf + out, len - out, 328 "%10s => InodeSlot: %d StolenInodes: %d, " 329 "MetaSlot: %d StolenMeta: %d\n", "Steal", 330 osb->s_inode_steal_slot, 331 atomic_read(&osb->s_num_inodes_stolen), 332 osb->s_meta_steal_slot, 333 atomic_read(&osb->s_num_meta_stolen)); 334 spin_unlock(&osb->osb_lock); 335 336 out += snprintf(buf + out, len - out, "OrphanScan => "); 337 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 338 os->os_count, os->os_seqno); 339 out += snprintf(buf + out, len - out, " Last Scan: "); 340 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 341 out += snprintf(buf + out, len - out, "Disabled\n"); 342 else 343 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 344 (get_seconds() - os->os_scantime.tv_sec)); 345 346 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 347 "Slots", "Num", "RecoGen"); 348 for (i = 0; i < osb->max_slots; ++i) { 349 out += snprintf(buf + out, len - out, 350 "%10s %c %3d %10d\n", 351 " ", 352 (i == osb->slot_num ? '*' : ' '), 353 i, osb->slot_recovery_generations[i]); 354 } 355 356 return out; 357 } 358 359 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 360 { 361 struct ocfs2_super *osb = inode->i_private; 362 char *buf = NULL; 363 364 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 365 if (!buf) 366 goto bail; 367 368 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 369 370 file->private_data = buf; 371 372 return 0; 373 bail: 374 return -ENOMEM; 375 } 376 377 static int ocfs2_debug_release(struct inode *inode, struct file *file) 378 { 379 kfree(file->private_data); 380 return 0; 381 } 382 383 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 384 size_t nbytes, loff_t *ppos) 385 { 386 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 387 i_size_read(file->f_mapping->host)); 388 } 389 #else 390 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 391 { 392 return 0; 393 } 394 static int ocfs2_debug_release(struct inode *inode, struct file *file) 395 { 396 return 0; 397 } 398 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 399 size_t nbytes, loff_t *ppos) 400 { 401 return 0; 402 } 403 #endif /* CONFIG_DEBUG_FS */ 404 405 static const struct file_operations ocfs2_osb_debug_fops = { 406 .open = ocfs2_osb_debug_open, 407 .release = ocfs2_debug_release, 408 .read = ocfs2_debug_read, 409 .llseek = generic_file_llseek, 410 }; 411 412 static int ocfs2_sync_fs(struct super_block *sb, int wait) 413 { 414 int status; 415 tid_t target; 416 struct ocfs2_super *osb = OCFS2_SB(sb); 417 418 if (ocfs2_is_hard_readonly(osb)) 419 return -EROFS; 420 421 if (wait) { 422 status = ocfs2_flush_truncate_log(osb); 423 if (status < 0) 424 mlog_errno(status); 425 } else { 426 ocfs2_schedule_truncate_log_flush(osb, 0); 427 } 428 429 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 430 &target)) { 431 if (wait) 432 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 433 target); 434 } 435 return 0; 436 } 437 438 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 439 { 440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 441 && (ino == USER_QUOTA_SYSTEM_INODE 442 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 443 return 0; 444 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 445 && (ino == GROUP_QUOTA_SYSTEM_INODE 446 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 447 return 0; 448 return 1; 449 } 450 451 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 452 { 453 struct inode *new = NULL; 454 int status = 0; 455 int i; 456 457 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 458 if (IS_ERR(new)) { 459 status = PTR_ERR(new); 460 mlog_errno(status); 461 goto bail; 462 } 463 osb->root_inode = new; 464 465 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 466 if (IS_ERR(new)) { 467 status = PTR_ERR(new); 468 mlog_errno(status); 469 goto bail; 470 } 471 osb->sys_root_inode = new; 472 473 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 474 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 475 if (!ocfs2_need_system_inode(osb, i)) 476 continue; 477 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 478 if (!new) { 479 ocfs2_release_system_inodes(osb); 480 status = -EINVAL; 481 mlog_errno(status); 482 /* FIXME: Should ERROR_RO_FS */ 483 mlog(ML_ERROR, "Unable to load system inode %d, " 484 "possibly corrupt fs?", i); 485 goto bail; 486 } 487 // the array now has one ref, so drop this one 488 iput(new); 489 } 490 491 bail: 492 if (status) 493 mlog_errno(status); 494 return status; 495 } 496 497 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 498 { 499 struct inode *new = NULL; 500 int status = 0; 501 int i; 502 503 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 504 i < NUM_SYSTEM_INODES; 505 i++) { 506 if (!ocfs2_need_system_inode(osb, i)) 507 continue; 508 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 509 if (!new) { 510 ocfs2_release_system_inodes(osb); 511 status = -EINVAL; 512 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 513 status, i, osb->slot_num); 514 goto bail; 515 } 516 /* the array now has one ref, so drop this one */ 517 iput(new); 518 } 519 520 bail: 521 if (status) 522 mlog_errno(status); 523 return status; 524 } 525 526 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 527 { 528 int i; 529 struct inode *inode; 530 531 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 532 inode = osb->global_system_inodes[i]; 533 if (inode) { 534 iput(inode); 535 osb->global_system_inodes[i] = NULL; 536 } 537 } 538 539 inode = osb->sys_root_inode; 540 if (inode) { 541 iput(inode); 542 osb->sys_root_inode = NULL; 543 } 544 545 inode = osb->root_inode; 546 if (inode) { 547 iput(inode); 548 osb->root_inode = NULL; 549 } 550 551 if (!osb->local_system_inodes) 552 return; 553 554 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 555 if (osb->local_system_inodes[i]) { 556 iput(osb->local_system_inodes[i]); 557 osb->local_system_inodes[i] = NULL; 558 } 559 } 560 561 kfree(osb->local_system_inodes); 562 osb->local_system_inodes = NULL; 563 } 564 565 /* We're allocating fs objects, use GFP_NOFS */ 566 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 567 { 568 struct ocfs2_inode_info *oi; 569 570 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 571 if (!oi) 572 return NULL; 573 574 oi->i_sync_tid = 0; 575 oi->i_datasync_tid = 0; 576 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 577 578 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 579 return &oi->vfs_inode; 580 } 581 582 static void ocfs2_i_callback(struct rcu_head *head) 583 { 584 struct inode *inode = container_of(head, struct inode, i_rcu); 585 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 586 } 587 588 static void ocfs2_destroy_inode(struct inode *inode) 589 { 590 call_rcu(&inode->i_rcu, ocfs2_i_callback); 591 } 592 593 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 594 unsigned int cbits) 595 { 596 unsigned int bytes = 1 << cbits; 597 unsigned int trim = bytes; 598 unsigned int bitshift = 32; 599 600 /* 601 * i_size and all block offsets in ocfs2 are always 64 bits 602 * wide. i_clusters is 32 bits, in cluster-sized units. So on 603 * 64 bit platforms, cluster size will be the limiting factor. 604 */ 605 606 #if BITS_PER_LONG == 32 607 # if defined(CONFIG_LBDAF) 608 BUILD_BUG_ON(sizeof(sector_t) != 8); 609 /* 610 * We might be limited by page cache size. 611 */ 612 if (bytes > PAGE_CACHE_SIZE) { 613 bytes = PAGE_CACHE_SIZE; 614 trim = 1; 615 /* 616 * Shift by 31 here so that we don't get larger than 617 * MAX_LFS_FILESIZE 618 */ 619 bitshift = 31; 620 } 621 # else 622 /* 623 * We are limited by the size of sector_t. Use block size, as 624 * that's what we expose to the VFS. 625 */ 626 bytes = 1 << bbits; 627 trim = 1; 628 bitshift = 31; 629 # endif 630 #endif 631 632 /* 633 * Trim by a whole cluster when we can actually approach the 634 * on-disk limits. Otherwise we can overflow i_clusters when 635 * an extent start is at the max offset. 636 */ 637 return (((unsigned long long)bytes) << bitshift) - trim; 638 } 639 640 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 641 { 642 int incompat_features; 643 int ret = 0; 644 struct mount_options parsed_options; 645 struct ocfs2_super *osb = OCFS2_SB(sb); 646 u32 tmp; 647 648 sync_filesystem(sb); 649 650 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 651 !ocfs2_check_set_options(sb, &parsed_options)) { 652 ret = -EINVAL; 653 goto out; 654 } 655 656 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 657 OCFS2_MOUNT_HB_NONE; 658 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 659 ret = -EINVAL; 660 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 661 goto out; 662 } 663 664 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 665 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 666 ret = -EINVAL; 667 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 668 goto out; 669 } 670 671 /* Probably don't want this on remount; it might 672 * mess with other nodes */ 673 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 674 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 675 ret = -EINVAL; 676 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 677 goto out; 678 } 679 680 /* We're going to/from readonly mode. */ 681 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 682 /* Disable quota accounting before remounting RO */ 683 if (*flags & MS_RDONLY) { 684 ret = ocfs2_susp_quotas(osb, 0); 685 if (ret < 0) 686 goto out; 687 } 688 /* Lock here so the check of HARD_RO and the potential 689 * setting of SOFT_RO is atomic. */ 690 spin_lock(&osb->osb_lock); 691 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 692 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 693 ret = -EROFS; 694 goto unlock_osb; 695 } 696 697 if (*flags & MS_RDONLY) { 698 sb->s_flags |= MS_RDONLY; 699 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 700 } else { 701 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 702 mlog(ML_ERROR, "Cannot remount RDWR " 703 "filesystem due to previous errors.\n"); 704 ret = -EROFS; 705 goto unlock_osb; 706 } 707 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 708 if (incompat_features) { 709 mlog(ML_ERROR, "Cannot remount RDWR because " 710 "of unsupported optional features " 711 "(%x).\n", incompat_features); 712 ret = -EINVAL; 713 goto unlock_osb; 714 } 715 sb->s_flags &= ~MS_RDONLY; 716 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 717 } 718 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 719 unlock_osb: 720 spin_unlock(&osb->osb_lock); 721 /* Enable quota accounting after remounting RW */ 722 if (!ret && !(*flags & MS_RDONLY)) { 723 if (sb_any_quota_suspended(sb)) 724 ret = ocfs2_susp_quotas(osb, 1); 725 else 726 ret = ocfs2_enable_quotas(osb); 727 if (ret < 0) { 728 /* Return back changes... */ 729 spin_lock(&osb->osb_lock); 730 sb->s_flags |= MS_RDONLY; 731 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 732 spin_unlock(&osb->osb_lock); 733 goto out; 734 } 735 } 736 } 737 738 if (!ret) { 739 /* Only save off the new mount options in case of a successful 740 * remount. */ 741 osb->s_mount_opt = parsed_options.mount_opt; 742 osb->s_atime_quantum = parsed_options.atime_quantum; 743 osb->preferred_slot = parsed_options.slot; 744 if (parsed_options.commit_interval) 745 osb->osb_commit_interval = parsed_options.commit_interval; 746 747 if (!ocfs2_is_hard_readonly(osb)) 748 ocfs2_set_journal_params(osb); 749 750 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 751 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 752 MS_POSIXACL : 0); 753 } 754 out: 755 return ret; 756 } 757 758 static int ocfs2_sb_probe(struct super_block *sb, 759 struct buffer_head **bh, 760 int *sector_size, 761 struct ocfs2_blockcheck_stats *stats) 762 { 763 int status, tmpstat; 764 struct ocfs1_vol_disk_hdr *hdr; 765 struct ocfs2_dinode *di; 766 int blksize; 767 768 *bh = NULL; 769 770 /* may be > 512 */ 771 *sector_size = bdev_logical_block_size(sb->s_bdev); 772 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 773 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 774 *sector_size, OCFS2_MAX_BLOCKSIZE); 775 status = -EINVAL; 776 goto bail; 777 } 778 779 /* Can this really happen? */ 780 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 781 *sector_size = OCFS2_MIN_BLOCKSIZE; 782 783 /* check block zero for old format */ 784 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 785 if (status < 0) { 786 mlog_errno(status); 787 goto bail; 788 } 789 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 790 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 791 mlog(ML_ERROR, "incompatible version: %u.%u\n", 792 hdr->major_version, hdr->minor_version); 793 status = -EINVAL; 794 } 795 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 796 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 797 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 798 hdr->signature); 799 status = -EINVAL; 800 } 801 brelse(*bh); 802 *bh = NULL; 803 if (status < 0) { 804 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 805 "upgraded before mounting with ocfs v2\n"); 806 goto bail; 807 } 808 809 /* 810 * Now check at magic offset for 512, 1024, 2048, 4096 811 * blocksizes. 4096 is the maximum blocksize because it is 812 * the minimum clustersize. 813 */ 814 status = -EINVAL; 815 for (blksize = *sector_size; 816 blksize <= OCFS2_MAX_BLOCKSIZE; 817 blksize <<= 1) { 818 tmpstat = ocfs2_get_sector(sb, bh, 819 OCFS2_SUPER_BLOCK_BLKNO, 820 blksize); 821 if (tmpstat < 0) { 822 status = tmpstat; 823 mlog_errno(status); 824 break; 825 } 826 di = (struct ocfs2_dinode *) (*bh)->b_data; 827 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 828 spin_lock_init(&stats->b_lock); 829 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 830 if (tmpstat < 0) { 831 brelse(*bh); 832 *bh = NULL; 833 } 834 if (tmpstat != -EAGAIN) { 835 status = tmpstat; 836 break; 837 } 838 } 839 840 bail: 841 return status; 842 } 843 844 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 845 { 846 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 847 848 if (osb->s_mount_opt & hb_enabled) { 849 if (ocfs2_mount_local(osb)) { 850 mlog(ML_ERROR, "Cannot heartbeat on a locally " 851 "mounted device.\n"); 852 return -EINVAL; 853 } 854 if (ocfs2_userspace_stack(osb)) { 855 mlog(ML_ERROR, "Userspace stack expected, but " 856 "o2cb heartbeat arguments passed to mount\n"); 857 return -EINVAL; 858 } 859 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 860 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 861 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 862 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 863 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 864 return -EINVAL; 865 } 866 } 867 868 if (!(osb->s_mount_opt & hb_enabled)) { 869 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 870 !ocfs2_userspace_stack(osb)) { 871 mlog(ML_ERROR, "Heartbeat has to be started to mount " 872 "a read-write clustered device.\n"); 873 return -EINVAL; 874 } 875 } 876 877 return 0; 878 } 879 880 /* 881 * If we're using a userspace stack, mount should have passed 882 * a name that matches the disk. If not, mount should not 883 * have passed a stack. 884 */ 885 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 886 struct mount_options *mopt) 887 { 888 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 889 mlog(ML_ERROR, 890 "cluster stack passed to mount, but this filesystem " 891 "does not support it\n"); 892 return -EINVAL; 893 } 894 895 if (ocfs2_userspace_stack(osb) && 896 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 897 OCFS2_STACK_LABEL_LEN)) { 898 mlog(ML_ERROR, 899 "cluster stack passed to mount (\"%s\") does not " 900 "match the filesystem (\"%s\")\n", 901 mopt->cluster_stack, 902 osb->osb_cluster_stack); 903 return -EINVAL; 904 } 905 906 return 0; 907 } 908 909 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 910 { 911 int type; 912 struct super_block *sb = osb->sb; 913 unsigned int feature[OCFS2_MAXQUOTAS] = { 914 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 915 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 916 int status = 0; 917 918 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 919 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 920 continue; 921 if (unsuspend) 922 status = dquot_resume(sb, type); 923 else { 924 struct ocfs2_mem_dqinfo *oinfo; 925 926 /* Cancel periodic syncing before suspending */ 927 oinfo = sb_dqinfo(sb, type)->dqi_priv; 928 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 929 status = dquot_suspend(sb, type); 930 } 931 if (status < 0) 932 break; 933 } 934 if (status < 0) 935 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 936 "remount (error = %d).\n", status); 937 return status; 938 } 939 940 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 941 { 942 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 943 struct super_block *sb = osb->sb; 944 unsigned int feature[OCFS2_MAXQUOTAS] = { 945 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 946 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 947 unsigned int ino[OCFS2_MAXQUOTAS] = { 948 LOCAL_USER_QUOTA_SYSTEM_INODE, 949 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 950 int status; 951 int type; 952 953 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 954 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 955 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 956 continue; 957 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 958 osb->slot_num); 959 if (!inode[type]) { 960 status = -ENOENT; 961 goto out_quota_off; 962 } 963 status = dquot_enable(inode[type], type, QFMT_OCFS2, 964 DQUOT_USAGE_ENABLED); 965 if (status < 0) 966 goto out_quota_off; 967 } 968 969 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 970 iput(inode[type]); 971 return 0; 972 out_quota_off: 973 ocfs2_disable_quotas(osb); 974 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 975 iput(inode[type]); 976 mlog_errno(status); 977 return status; 978 } 979 980 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 981 { 982 int type; 983 struct inode *inode; 984 struct super_block *sb = osb->sb; 985 struct ocfs2_mem_dqinfo *oinfo; 986 987 /* We mostly ignore errors in this function because there's not much 988 * we can do when we see them */ 989 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 990 if (!sb_has_quota_loaded(sb, type)) 991 continue; 992 /* Cancel periodic syncing before we grab dqonoff_mutex */ 993 oinfo = sb_dqinfo(sb, type)->dqi_priv; 994 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 995 inode = igrab(sb->s_dquot.files[type]); 996 /* Turn off quotas. This will remove all dquot structures from 997 * memory and so they will be automatically synced to global 998 * quota files */ 999 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 1000 DQUOT_LIMITS_ENABLED); 1001 if (!inode) 1002 continue; 1003 iput(inode); 1004 } 1005 } 1006 1007 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1008 { 1009 struct dentry *root; 1010 int status, sector_size; 1011 struct mount_options parsed_options; 1012 struct inode *inode = NULL; 1013 struct ocfs2_super *osb = NULL; 1014 struct buffer_head *bh = NULL; 1015 char nodestr[12]; 1016 struct ocfs2_blockcheck_stats stats; 1017 1018 trace_ocfs2_fill_super(sb, data, silent); 1019 1020 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1021 status = -EINVAL; 1022 goto read_super_error; 1023 } 1024 1025 /* probe for superblock */ 1026 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1027 if (status < 0) { 1028 mlog(ML_ERROR, "superblock probe failed!\n"); 1029 goto read_super_error; 1030 } 1031 1032 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1033 osb = OCFS2_SB(sb); 1034 if (status < 0) { 1035 mlog_errno(status); 1036 goto read_super_error; 1037 } 1038 brelse(bh); 1039 bh = NULL; 1040 1041 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1042 status = -EINVAL; 1043 goto read_super_error; 1044 } 1045 osb->s_mount_opt = parsed_options.mount_opt; 1046 osb->s_atime_quantum = parsed_options.atime_quantum; 1047 osb->preferred_slot = parsed_options.slot; 1048 osb->osb_commit_interval = parsed_options.commit_interval; 1049 1050 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1051 osb->osb_resv_level = parsed_options.resv_level; 1052 osb->osb_dir_resv_level = parsed_options.resv_level; 1053 if (parsed_options.dir_resv_level == -1) 1054 osb->osb_dir_resv_level = parsed_options.resv_level; 1055 else 1056 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1057 1058 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1059 if (status) 1060 goto read_super_error; 1061 1062 sb->s_magic = OCFS2_SUPER_MAGIC; 1063 1064 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1065 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1066 1067 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1068 * heartbeat=none */ 1069 if (bdev_read_only(sb->s_bdev)) { 1070 if (!(sb->s_flags & MS_RDONLY)) { 1071 status = -EACCES; 1072 mlog(ML_ERROR, "Readonly device detected but readonly " 1073 "mount was not specified.\n"); 1074 goto read_super_error; 1075 } 1076 1077 /* You should not be able to start a local heartbeat 1078 * on a readonly device. */ 1079 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1080 status = -EROFS; 1081 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1082 "device.\n"); 1083 goto read_super_error; 1084 } 1085 1086 status = ocfs2_check_journals_nolocks(osb); 1087 if (status < 0) { 1088 if (status == -EROFS) 1089 mlog(ML_ERROR, "Recovery required on readonly " 1090 "file system, but write access is " 1091 "unavailable.\n"); 1092 else 1093 mlog_errno(status); 1094 goto read_super_error; 1095 } 1096 1097 ocfs2_set_ro_flag(osb, 1); 1098 1099 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1100 "Cluster services will not be used for this mount. " 1101 "Recovery will be skipped.\n", osb->dev_str); 1102 } 1103 1104 if (!ocfs2_is_hard_readonly(osb)) { 1105 if (sb->s_flags & MS_RDONLY) 1106 ocfs2_set_ro_flag(osb, 0); 1107 } 1108 1109 status = ocfs2_verify_heartbeat(osb); 1110 if (status < 0) { 1111 mlog_errno(status); 1112 goto read_super_error; 1113 } 1114 1115 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1116 ocfs2_debugfs_root); 1117 if (!osb->osb_debug_root) { 1118 status = -EINVAL; 1119 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1120 goto read_super_error; 1121 } 1122 1123 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1124 osb->osb_debug_root, 1125 osb, 1126 &ocfs2_osb_debug_fops); 1127 if (!osb->osb_ctxt) { 1128 status = -EINVAL; 1129 mlog_errno(status); 1130 goto read_super_error; 1131 } 1132 1133 if (ocfs2_meta_ecc(osb)) { 1134 status = ocfs2_blockcheck_stats_debugfs_install( 1135 &osb->osb_ecc_stats, 1136 osb->osb_debug_root); 1137 if (status) { 1138 mlog(ML_ERROR, 1139 "Unable to create blockcheck statistics " 1140 "files\n"); 1141 goto read_super_error; 1142 } 1143 } 1144 1145 status = ocfs2_mount_volume(sb); 1146 if (status < 0) 1147 goto read_super_error; 1148 1149 if (osb->root_inode) 1150 inode = igrab(osb->root_inode); 1151 1152 if (!inode) { 1153 status = -EIO; 1154 mlog_errno(status); 1155 goto read_super_error; 1156 } 1157 1158 root = d_make_root(inode); 1159 if (!root) { 1160 status = -ENOMEM; 1161 mlog_errno(status); 1162 goto read_super_error; 1163 } 1164 1165 sb->s_root = root; 1166 1167 ocfs2_complete_mount_recovery(osb); 1168 1169 if (ocfs2_mount_local(osb)) 1170 snprintf(nodestr, sizeof(nodestr), "local"); 1171 else 1172 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1173 1174 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1175 "with %s data mode.\n", 1176 osb->dev_str, nodestr, osb->slot_num, 1177 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1178 "ordered"); 1179 1180 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1181 wake_up(&osb->osb_mount_event); 1182 1183 /* Now we can initialize quotas because we can afford to wait 1184 * for cluster locks recovery now. That also means that truncation 1185 * log recovery can happen but that waits for proper quota setup */ 1186 if (!(sb->s_flags & MS_RDONLY)) { 1187 status = ocfs2_enable_quotas(osb); 1188 if (status < 0) { 1189 /* We have to err-out specially here because 1190 * s_root is already set */ 1191 mlog_errno(status); 1192 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1193 wake_up(&osb->osb_mount_event); 1194 return status; 1195 } 1196 } 1197 1198 ocfs2_complete_quota_recovery(osb); 1199 1200 /* Now we wake up again for processes waiting for quotas */ 1201 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1202 wake_up(&osb->osb_mount_event); 1203 1204 /* Start this when the mount is almost sure of being successful */ 1205 ocfs2_orphan_scan_start(osb); 1206 1207 return status; 1208 1209 read_super_error: 1210 brelse(bh); 1211 1212 if (osb) { 1213 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1214 wake_up(&osb->osb_mount_event); 1215 ocfs2_dismount_volume(sb, 1); 1216 } 1217 1218 if (status) 1219 mlog_errno(status); 1220 return status; 1221 } 1222 1223 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1224 int flags, 1225 const char *dev_name, 1226 void *data) 1227 { 1228 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1229 } 1230 1231 static struct file_system_type ocfs2_fs_type = { 1232 .owner = THIS_MODULE, 1233 .name = "ocfs2", 1234 .mount = ocfs2_mount, 1235 .kill_sb = kill_block_super, 1236 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1237 .next = NULL 1238 }; 1239 MODULE_ALIAS_FS("ocfs2"); 1240 1241 static int ocfs2_check_set_options(struct super_block *sb, 1242 struct mount_options *options) 1243 { 1244 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1245 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1246 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1247 mlog(ML_ERROR, "User quotas were requested, but this " 1248 "filesystem does not have the feature enabled.\n"); 1249 return 0; 1250 } 1251 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1252 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1253 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1254 mlog(ML_ERROR, "Group quotas were requested, but this " 1255 "filesystem does not have the feature enabled.\n"); 1256 return 0; 1257 } 1258 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1259 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1260 mlog(ML_ERROR, "ACL support requested but extended attributes " 1261 "feature is not enabled\n"); 1262 return 0; 1263 } 1264 /* No ACL setting specified? Use XATTR feature... */ 1265 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1266 OCFS2_MOUNT_NO_POSIX_ACL))) { 1267 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1268 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1269 else 1270 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1271 } 1272 return 1; 1273 } 1274 1275 static int ocfs2_parse_options(struct super_block *sb, 1276 char *options, 1277 struct mount_options *mopt, 1278 int is_remount) 1279 { 1280 int status, user_stack = 0; 1281 char *p; 1282 u32 tmp; 1283 1284 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1285 1286 mopt->commit_interval = 0; 1287 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1288 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1289 mopt->slot = OCFS2_INVALID_SLOT; 1290 mopt->localalloc_opt = -1; 1291 mopt->cluster_stack[0] = '\0'; 1292 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1293 mopt->dir_resv_level = -1; 1294 1295 if (!options) { 1296 status = 1; 1297 goto bail; 1298 } 1299 1300 while ((p = strsep(&options, ",")) != NULL) { 1301 int token, option; 1302 substring_t args[MAX_OPT_ARGS]; 1303 1304 if (!*p) 1305 continue; 1306 1307 token = match_token(p, tokens, args); 1308 switch (token) { 1309 case Opt_hb_local: 1310 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1311 break; 1312 case Opt_hb_none: 1313 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1314 break; 1315 case Opt_hb_global: 1316 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1317 break; 1318 case Opt_barrier: 1319 if (match_int(&args[0], &option)) { 1320 status = 0; 1321 goto bail; 1322 } 1323 if (option) 1324 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1325 else 1326 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1327 break; 1328 case Opt_intr: 1329 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1330 break; 1331 case Opt_nointr: 1332 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1333 break; 1334 case Opt_err_panic: 1335 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1336 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1337 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1338 break; 1339 case Opt_err_ro: 1340 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT; 1341 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1342 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS; 1343 break; 1344 case Opt_err_cont: 1345 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS; 1346 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1347 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT; 1348 break; 1349 case Opt_data_ordered: 1350 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1351 break; 1352 case Opt_data_writeback: 1353 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1354 break; 1355 case Opt_user_xattr: 1356 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1357 break; 1358 case Opt_nouser_xattr: 1359 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1360 break; 1361 case Opt_atime_quantum: 1362 if (match_int(&args[0], &option)) { 1363 status = 0; 1364 goto bail; 1365 } 1366 if (option >= 0) 1367 mopt->atime_quantum = option; 1368 break; 1369 case Opt_slot: 1370 option = 0; 1371 if (match_int(&args[0], &option)) { 1372 status = 0; 1373 goto bail; 1374 } 1375 if (option) 1376 mopt->slot = (s16)option; 1377 break; 1378 case Opt_commit: 1379 option = 0; 1380 if (match_int(&args[0], &option)) { 1381 status = 0; 1382 goto bail; 1383 } 1384 if (option < 0) 1385 return 0; 1386 if (option == 0) 1387 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1388 mopt->commit_interval = HZ * option; 1389 break; 1390 case Opt_localalloc: 1391 option = 0; 1392 if (match_int(&args[0], &option)) { 1393 status = 0; 1394 goto bail; 1395 } 1396 if (option >= 0) 1397 mopt->localalloc_opt = option; 1398 break; 1399 case Opt_localflocks: 1400 /* 1401 * Changing this during remount could race 1402 * flock() requests, or "unbalance" existing 1403 * ones (e.g., a lock is taken in one mode but 1404 * dropped in the other). If users care enough 1405 * to flip locking modes during remount, we 1406 * could add a "local" flag to individual 1407 * flock structures for proper tracking of 1408 * state. 1409 */ 1410 if (!is_remount) 1411 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1412 break; 1413 case Opt_stack: 1414 /* Check both that the option we were passed 1415 * is of the right length and that it is a proper 1416 * string of the right length. 1417 */ 1418 if (((args[0].to - args[0].from) != 1419 OCFS2_STACK_LABEL_LEN) || 1420 (strnlen(args[0].from, 1421 OCFS2_STACK_LABEL_LEN) != 1422 OCFS2_STACK_LABEL_LEN)) { 1423 mlog(ML_ERROR, 1424 "Invalid cluster_stack option\n"); 1425 status = 0; 1426 goto bail; 1427 } 1428 memcpy(mopt->cluster_stack, args[0].from, 1429 OCFS2_STACK_LABEL_LEN); 1430 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1431 /* 1432 * Open code the memcmp here as we don't have 1433 * an osb to pass to 1434 * ocfs2_userspace_stack(). 1435 */ 1436 if (memcmp(mopt->cluster_stack, 1437 OCFS2_CLASSIC_CLUSTER_STACK, 1438 OCFS2_STACK_LABEL_LEN)) 1439 user_stack = 1; 1440 break; 1441 case Opt_inode64: 1442 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1443 break; 1444 case Opt_usrquota: 1445 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1446 break; 1447 case Opt_grpquota: 1448 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1449 break; 1450 case Opt_coherency_buffered: 1451 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1452 break; 1453 case Opt_coherency_full: 1454 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1455 break; 1456 case Opt_acl: 1457 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1458 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1459 break; 1460 case Opt_noacl: 1461 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1462 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1463 break; 1464 case Opt_resv_level: 1465 if (is_remount) 1466 break; 1467 if (match_int(&args[0], &option)) { 1468 status = 0; 1469 goto bail; 1470 } 1471 if (option >= OCFS2_MIN_RESV_LEVEL && 1472 option < OCFS2_MAX_RESV_LEVEL) 1473 mopt->resv_level = option; 1474 break; 1475 case Opt_dir_resv_level: 1476 if (is_remount) 1477 break; 1478 if (match_int(&args[0], &option)) { 1479 status = 0; 1480 goto bail; 1481 } 1482 if (option >= OCFS2_MIN_RESV_LEVEL && 1483 option < OCFS2_MAX_RESV_LEVEL) 1484 mopt->dir_resv_level = option; 1485 break; 1486 case Opt_journal_async_commit: 1487 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1488 break; 1489 default: 1490 mlog(ML_ERROR, 1491 "Unrecognized mount option \"%s\" " 1492 "or missing value\n", p); 1493 status = 0; 1494 goto bail; 1495 } 1496 } 1497 1498 if (user_stack == 0) { 1499 /* Ensure only one heartbeat mode */ 1500 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1501 OCFS2_MOUNT_HB_GLOBAL | 1502 OCFS2_MOUNT_HB_NONE); 1503 if (hweight32(tmp) != 1) { 1504 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1505 status = 0; 1506 goto bail; 1507 } 1508 } 1509 1510 status = 1; 1511 1512 bail: 1513 return status; 1514 } 1515 1516 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1517 { 1518 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1519 unsigned long opts = osb->s_mount_opt; 1520 unsigned int local_alloc_megs; 1521 1522 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1523 seq_printf(s, ",_netdev"); 1524 if (opts & OCFS2_MOUNT_HB_LOCAL) 1525 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1526 else 1527 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1528 } else 1529 seq_printf(s, ",%s", OCFS2_HB_NONE); 1530 1531 if (opts & OCFS2_MOUNT_NOINTR) 1532 seq_printf(s, ",nointr"); 1533 1534 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1535 seq_printf(s, ",data=writeback"); 1536 else 1537 seq_printf(s, ",data=ordered"); 1538 1539 if (opts & OCFS2_MOUNT_BARRIER) 1540 seq_printf(s, ",barrier=1"); 1541 1542 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1543 seq_printf(s, ",errors=panic"); 1544 else if (opts & OCFS2_MOUNT_ERRORS_CONT) 1545 seq_printf(s, ",errors=continue"); 1546 else 1547 seq_printf(s, ",errors=remount-ro"); 1548 1549 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1550 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1551 1552 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1553 1554 if (osb->osb_commit_interval) 1555 seq_printf(s, ",commit=%u", 1556 (unsigned) (osb->osb_commit_interval / HZ)); 1557 1558 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1559 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1560 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1561 1562 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1563 seq_printf(s, ",localflocks,"); 1564 1565 if (osb->osb_cluster_stack[0]) 1566 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack, 1567 OCFS2_STACK_LABEL_LEN); 1568 if (opts & OCFS2_MOUNT_USRQUOTA) 1569 seq_printf(s, ",usrquota"); 1570 if (opts & OCFS2_MOUNT_GRPQUOTA) 1571 seq_printf(s, ",grpquota"); 1572 1573 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1574 seq_printf(s, ",coherency=buffered"); 1575 else 1576 seq_printf(s, ",coherency=full"); 1577 1578 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1579 seq_printf(s, ",nouser_xattr"); 1580 else 1581 seq_printf(s, ",user_xattr"); 1582 1583 if (opts & OCFS2_MOUNT_INODE64) 1584 seq_printf(s, ",inode64"); 1585 1586 if (opts & OCFS2_MOUNT_POSIX_ACL) 1587 seq_printf(s, ",acl"); 1588 else 1589 seq_printf(s, ",noacl"); 1590 1591 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1592 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1593 1594 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1595 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1596 1597 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1598 seq_printf(s, ",journal_async_commit"); 1599 1600 return 0; 1601 } 1602 1603 static int __init ocfs2_init(void) 1604 { 1605 int status; 1606 1607 status = init_ocfs2_uptodate_cache(); 1608 if (status < 0) 1609 goto out1; 1610 1611 status = ocfs2_initialize_mem_caches(); 1612 if (status < 0) 1613 goto out2; 1614 1615 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1616 if (!ocfs2_wq) { 1617 status = -ENOMEM; 1618 goto out3; 1619 } 1620 1621 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1622 if (!ocfs2_debugfs_root) { 1623 status = -ENOMEM; 1624 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1625 goto out4; 1626 } 1627 1628 ocfs2_set_locking_protocol(); 1629 1630 status = register_quota_format(&ocfs2_quota_format); 1631 if (status < 0) 1632 goto out4; 1633 status = register_filesystem(&ocfs2_fs_type); 1634 if (!status) 1635 return 0; 1636 1637 unregister_quota_format(&ocfs2_quota_format); 1638 out4: 1639 destroy_workqueue(ocfs2_wq); 1640 debugfs_remove(ocfs2_debugfs_root); 1641 out3: 1642 ocfs2_free_mem_caches(); 1643 out2: 1644 exit_ocfs2_uptodate_cache(); 1645 out1: 1646 mlog_errno(status); 1647 return status; 1648 } 1649 1650 static void __exit ocfs2_exit(void) 1651 { 1652 if (ocfs2_wq) { 1653 flush_workqueue(ocfs2_wq); 1654 destroy_workqueue(ocfs2_wq); 1655 } 1656 1657 unregister_quota_format(&ocfs2_quota_format); 1658 1659 debugfs_remove(ocfs2_debugfs_root); 1660 1661 ocfs2_free_mem_caches(); 1662 1663 unregister_filesystem(&ocfs2_fs_type); 1664 1665 exit_ocfs2_uptodate_cache(); 1666 } 1667 1668 static void ocfs2_put_super(struct super_block *sb) 1669 { 1670 trace_ocfs2_put_super(sb); 1671 1672 ocfs2_sync_blockdev(sb); 1673 ocfs2_dismount_volume(sb, 0); 1674 } 1675 1676 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1677 { 1678 struct ocfs2_super *osb; 1679 u32 numbits, freebits; 1680 int status; 1681 struct ocfs2_dinode *bm_lock; 1682 struct buffer_head *bh = NULL; 1683 struct inode *inode = NULL; 1684 1685 trace_ocfs2_statfs(dentry->d_sb, buf); 1686 1687 osb = OCFS2_SB(dentry->d_sb); 1688 1689 inode = ocfs2_get_system_file_inode(osb, 1690 GLOBAL_BITMAP_SYSTEM_INODE, 1691 OCFS2_INVALID_SLOT); 1692 if (!inode) { 1693 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1694 status = -EIO; 1695 goto bail; 1696 } 1697 1698 status = ocfs2_inode_lock(inode, &bh, 0); 1699 if (status < 0) { 1700 mlog_errno(status); 1701 goto bail; 1702 } 1703 1704 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1705 1706 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1707 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1708 1709 buf->f_type = OCFS2_SUPER_MAGIC; 1710 buf->f_bsize = dentry->d_sb->s_blocksize; 1711 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1712 buf->f_blocks = ((sector_t) numbits) * 1713 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1714 buf->f_bfree = ((sector_t) freebits) * 1715 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1716 buf->f_bavail = buf->f_bfree; 1717 buf->f_files = numbits; 1718 buf->f_ffree = freebits; 1719 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1720 & 0xFFFFFFFFUL; 1721 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1722 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1723 1724 brelse(bh); 1725 1726 ocfs2_inode_unlock(inode, 0); 1727 status = 0; 1728 bail: 1729 if (inode) 1730 iput(inode); 1731 1732 if (status) 1733 mlog_errno(status); 1734 1735 return status; 1736 } 1737 1738 static void ocfs2_inode_init_once(void *data) 1739 { 1740 struct ocfs2_inode_info *oi = data; 1741 1742 oi->ip_flags = 0; 1743 oi->ip_open_count = 0; 1744 spin_lock_init(&oi->ip_lock); 1745 ocfs2_extent_map_init(&oi->vfs_inode); 1746 INIT_LIST_HEAD(&oi->ip_io_markers); 1747 oi->ip_dir_start_lookup = 0; 1748 mutex_init(&oi->ip_unaligned_aio); 1749 init_rwsem(&oi->ip_alloc_sem); 1750 init_rwsem(&oi->ip_xattr_sem); 1751 mutex_init(&oi->ip_io_mutex); 1752 1753 oi->ip_blkno = 0ULL; 1754 oi->ip_clusters = 0; 1755 1756 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1757 1758 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1759 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1760 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1761 1762 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1763 &ocfs2_inode_caching_ops); 1764 1765 inode_init_once(&oi->vfs_inode); 1766 } 1767 1768 static int ocfs2_initialize_mem_caches(void) 1769 { 1770 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1771 sizeof(struct ocfs2_inode_info), 1772 0, 1773 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1774 SLAB_MEM_SPREAD), 1775 ocfs2_inode_init_once); 1776 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1777 sizeof(struct ocfs2_dquot), 1778 0, 1779 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1780 SLAB_MEM_SPREAD), 1781 NULL); 1782 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1783 sizeof(struct ocfs2_quota_chunk), 1784 0, 1785 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1786 NULL); 1787 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1788 !ocfs2_qf_chunk_cachep) { 1789 if (ocfs2_inode_cachep) 1790 kmem_cache_destroy(ocfs2_inode_cachep); 1791 if (ocfs2_dquot_cachep) 1792 kmem_cache_destroy(ocfs2_dquot_cachep); 1793 if (ocfs2_qf_chunk_cachep) 1794 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1795 return -ENOMEM; 1796 } 1797 1798 return 0; 1799 } 1800 1801 static void ocfs2_free_mem_caches(void) 1802 { 1803 /* 1804 * Make sure all delayed rcu free inodes are flushed before we 1805 * destroy cache. 1806 */ 1807 rcu_barrier(); 1808 if (ocfs2_inode_cachep) 1809 kmem_cache_destroy(ocfs2_inode_cachep); 1810 ocfs2_inode_cachep = NULL; 1811 1812 if (ocfs2_dquot_cachep) 1813 kmem_cache_destroy(ocfs2_dquot_cachep); 1814 ocfs2_dquot_cachep = NULL; 1815 1816 if (ocfs2_qf_chunk_cachep) 1817 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1818 ocfs2_qf_chunk_cachep = NULL; 1819 } 1820 1821 static int ocfs2_get_sector(struct super_block *sb, 1822 struct buffer_head **bh, 1823 int block, 1824 int sect_size) 1825 { 1826 if (!sb_set_blocksize(sb, sect_size)) { 1827 mlog(ML_ERROR, "unable to set blocksize\n"); 1828 return -EIO; 1829 } 1830 1831 *bh = sb_getblk(sb, block); 1832 if (!*bh) { 1833 mlog_errno(-ENOMEM); 1834 return -ENOMEM; 1835 } 1836 lock_buffer(*bh); 1837 if (!buffer_dirty(*bh)) 1838 clear_buffer_uptodate(*bh); 1839 unlock_buffer(*bh); 1840 ll_rw_block(READ, 1, bh); 1841 wait_on_buffer(*bh); 1842 if (!buffer_uptodate(*bh)) { 1843 mlog_errno(-EIO); 1844 brelse(*bh); 1845 *bh = NULL; 1846 return -EIO; 1847 } 1848 1849 return 0; 1850 } 1851 1852 static int ocfs2_mount_volume(struct super_block *sb) 1853 { 1854 int status = 0; 1855 int unlock_super = 0; 1856 struct ocfs2_super *osb = OCFS2_SB(sb); 1857 1858 if (ocfs2_is_hard_readonly(osb)) 1859 goto leave; 1860 1861 status = ocfs2_dlm_init(osb); 1862 if (status < 0) { 1863 mlog_errno(status); 1864 goto leave; 1865 } 1866 1867 status = ocfs2_super_lock(osb, 1); 1868 if (status < 0) { 1869 mlog_errno(status); 1870 goto leave; 1871 } 1872 unlock_super = 1; 1873 1874 /* This will load up the node map and add ourselves to it. */ 1875 status = ocfs2_find_slot(osb); 1876 if (status < 0) { 1877 mlog_errno(status); 1878 goto leave; 1879 } 1880 1881 /* load all node-local system inodes */ 1882 status = ocfs2_init_local_system_inodes(osb); 1883 if (status < 0) { 1884 mlog_errno(status); 1885 goto leave; 1886 } 1887 1888 status = ocfs2_check_volume(osb); 1889 if (status < 0) { 1890 mlog_errno(status); 1891 goto leave; 1892 } 1893 1894 status = ocfs2_truncate_log_init(osb); 1895 if (status < 0) 1896 mlog_errno(status); 1897 1898 leave: 1899 if (unlock_super) 1900 ocfs2_super_unlock(osb, 1); 1901 1902 return status; 1903 } 1904 1905 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1906 { 1907 int tmp, hangup_needed = 0; 1908 struct ocfs2_super *osb = NULL; 1909 char nodestr[12]; 1910 1911 trace_ocfs2_dismount_volume(sb); 1912 1913 BUG_ON(!sb); 1914 osb = OCFS2_SB(sb); 1915 BUG_ON(!osb); 1916 1917 debugfs_remove(osb->osb_ctxt); 1918 1919 /* Orphan scan should be stopped as early as possible */ 1920 ocfs2_orphan_scan_stop(osb); 1921 1922 ocfs2_disable_quotas(osb); 1923 1924 /* All dquots should be freed by now */ 1925 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1926 /* Wait for worker to be done with the work structure in osb */ 1927 cancel_work_sync(&osb->dquot_drop_work); 1928 1929 ocfs2_shutdown_local_alloc(osb); 1930 1931 ocfs2_truncate_log_shutdown(osb); 1932 1933 /* This will disable recovery and flush any recovery work. */ 1934 ocfs2_recovery_exit(osb); 1935 1936 ocfs2_journal_shutdown(osb); 1937 1938 ocfs2_sync_blockdev(sb); 1939 1940 ocfs2_purge_refcount_trees(osb); 1941 1942 /* No cluster connection means we've failed during mount, so skip 1943 * all the steps which depended on that to complete. */ 1944 if (osb->cconn) { 1945 tmp = ocfs2_super_lock(osb, 1); 1946 if (tmp < 0) { 1947 mlog_errno(tmp); 1948 return; 1949 } 1950 } 1951 1952 if (osb->slot_num != OCFS2_INVALID_SLOT) 1953 ocfs2_put_slot(osb); 1954 1955 if (osb->cconn) 1956 ocfs2_super_unlock(osb, 1); 1957 1958 ocfs2_release_system_inodes(osb); 1959 1960 /* 1961 * If we're dismounting due to mount error, mount.ocfs2 will clean 1962 * up heartbeat. If we're a local mount, there is no heartbeat. 1963 * If we failed before we got a uuid_str yet, we can't stop 1964 * heartbeat. Otherwise, do it. 1965 */ 1966 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1967 !ocfs2_is_hard_readonly(osb)) 1968 hangup_needed = 1; 1969 1970 if (osb->cconn) 1971 ocfs2_dlm_shutdown(osb, hangup_needed); 1972 1973 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1974 debugfs_remove(osb->osb_debug_root); 1975 1976 if (hangup_needed) 1977 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1978 1979 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1980 1981 if (ocfs2_mount_local(osb)) 1982 snprintf(nodestr, sizeof(nodestr), "local"); 1983 else 1984 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1985 1986 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1987 osb->dev_str, nodestr); 1988 1989 ocfs2_delete_osb(osb); 1990 kfree(osb); 1991 sb->s_dev = 0; 1992 sb->s_fs_info = NULL; 1993 } 1994 1995 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1996 unsigned uuid_bytes) 1997 { 1998 int i, ret; 1999 char *ptr; 2000 2001 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2002 2003 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2004 if (osb->uuid_str == NULL) 2005 return -ENOMEM; 2006 2007 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2008 /* print with null */ 2009 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2010 if (ret != 2) /* drop super cleans up */ 2011 return -EINVAL; 2012 /* then only advance past the last char */ 2013 ptr += 2; 2014 } 2015 2016 return 0; 2017 } 2018 2019 /* Make sure entire volume is addressable by our journal. Requires 2020 osb_clusters_at_boot to be valid and for the journal to have been 2021 initialized by ocfs2_journal_init(). */ 2022 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2023 { 2024 int status = 0; 2025 u64 max_block = 2026 ocfs2_clusters_to_blocks(osb->sb, 2027 osb->osb_clusters_at_boot) - 1; 2028 2029 /* 32-bit block number is always OK. */ 2030 if (max_block <= (u32)~0ULL) 2031 goto out; 2032 2033 /* Volume is "huge", so see if our journal is new enough to 2034 support it. */ 2035 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2036 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2037 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2038 JBD2_FEATURE_INCOMPAT_64BIT))) { 2039 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2040 "Enable the 'block64' journal option with tunefs.ocfs2"); 2041 status = -EFBIG; 2042 goto out; 2043 } 2044 2045 out: 2046 return status; 2047 } 2048 2049 static int ocfs2_initialize_super(struct super_block *sb, 2050 struct buffer_head *bh, 2051 int sector_size, 2052 struct ocfs2_blockcheck_stats *stats) 2053 { 2054 int status; 2055 int i, cbits, bbits; 2056 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2057 struct inode *inode = NULL; 2058 struct ocfs2_journal *journal; 2059 struct ocfs2_super *osb; 2060 u64 total_blocks; 2061 2062 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2063 if (!osb) { 2064 status = -ENOMEM; 2065 mlog_errno(status); 2066 goto bail; 2067 } 2068 2069 sb->s_fs_info = osb; 2070 sb->s_op = &ocfs2_sops; 2071 sb->s_d_op = &ocfs2_dentry_ops; 2072 sb->s_export_op = &ocfs2_export_ops; 2073 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2074 sb->dq_op = &ocfs2_quota_operations; 2075 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2076 sb->s_xattr = ocfs2_xattr_handlers; 2077 sb->s_time_gran = 1; 2078 sb->s_flags |= MS_NOATIME; 2079 /* this is needed to support O_LARGEFILE */ 2080 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2081 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2082 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2083 memcpy(sb->s_uuid, di->id2.i_super.s_uuid, 2084 sizeof(di->id2.i_super.s_uuid)); 2085 2086 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2087 2088 for (i = 0; i < 3; i++) 2089 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2090 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2091 2092 osb->sb = sb; 2093 /* Save off for ocfs2_rw_direct */ 2094 osb->s_sectsize_bits = blksize_bits(sector_size); 2095 BUG_ON(!osb->s_sectsize_bits); 2096 2097 spin_lock_init(&osb->dc_task_lock); 2098 init_waitqueue_head(&osb->dc_event); 2099 osb->dc_work_sequence = 0; 2100 osb->dc_wake_sequence = 0; 2101 INIT_LIST_HEAD(&osb->blocked_lock_list); 2102 osb->blocked_lock_count = 0; 2103 spin_lock_init(&osb->osb_lock); 2104 spin_lock_init(&osb->osb_xattr_lock); 2105 ocfs2_init_steal_slots(osb); 2106 2107 mutex_init(&osb->system_file_mutex); 2108 2109 atomic_set(&osb->alloc_stats.moves, 0); 2110 atomic_set(&osb->alloc_stats.local_data, 0); 2111 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2112 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2113 atomic_set(&osb->alloc_stats.bg_extends, 0); 2114 2115 /* Copy the blockcheck stats from the superblock probe */ 2116 osb->osb_ecc_stats = *stats; 2117 2118 ocfs2_init_node_maps(osb); 2119 2120 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2121 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2122 2123 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2124 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2125 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2126 osb->max_slots); 2127 status = -EINVAL; 2128 goto bail; 2129 } 2130 2131 ocfs2_orphan_scan_init(osb); 2132 2133 status = ocfs2_recovery_init(osb); 2134 if (status) { 2135 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2136 mlog_errno(status); 2137 goto bail; 2138 } 2139 2140 init_waitqueue_head(&osb->checkpoint_event); 2141 2142 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2143 2144 osb->slot_num = OCFS2_INVALID_SLOT; 2145 2146 osb->s_xattr_inline_size = le16_to_cpu( 2147 di->id2.i_super.s_xattr_inline_size); 2148 2149 osb->local_alloc_state = OCFS2_LA_UNUSED; 2150 osb->local_alloc_bh = NULL; 2151 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2152 2153 init_waitqueue_head(&osb->osb_mount_event); 2154 2155 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2156 if (status) { 2157 mlog_errno(status); 2158 goto bail; 2159 } 2160 2161 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2162 if (!osb->vol_label) { 2163 mlog(ML_ERROR, "unable to alloc vol label\n"); 2164 status = -ENOMEM; 2165 goto bail; 2166 } 2167 2168 osb->slot_recovery_generations = 2169 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2170 GFP_KERNEL); 2171 if (!osb->slot_recovery_generations) { 2172 status = -ENOMEM; 2173 mlog_errno(status); 2174 goto bail; 2175 } 2176 2177 init_waitqueue_head(&osb->osb_wipe_event); 2178 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2179 sizeof(*osb->osb_orphan_wipes), 2180 GFP_KERNEL); 2181 if (!osb->osb_orphan_wipes) { 2182 status = -ENOMEM; 2183 mlog_errno(status); 2184 goto bail; 2185 } 2186 2187 osb->osb_rf_lock_tree = RB_ROOT; 2188 2189 osb->s_feature_compat = 2190 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2191 osb->s_feature_ro_compat = 2192 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2193 osb->s_feature_incompat = 2194 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2195 2196 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2197 mlog(ML_ERROR, "couldn't mount because of unsupported " 2198 "optional features (%x).\n", i); 2199 status = -EINVAL; 2200 goto bail; 2201 } 2202 if (!(osb->sb->s_flags & MS_RDONLY) && 2203 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2204 mlog(ML_ERROR, "couldn't mount RDWR because of " 2205 "unsupported optional features (%x).\n", i); 2206 status = -EINVAL; 2207 goto bail; 2208 } 2209 2210 if (ocfs2_clusterinfo_valid(osb)) { 2211 osb->osb_stackflags = 2212 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2213 strlcpy(osb->osb_cluster_stack, 2214 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2215 OCFS2_STACK_LABEL_LEN + 1); 2216 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2217 mlog(ML_ERROR, 2218 "couldn't mount because of an invalid " 2219 "cluster stack label (%s) \n", 2220 osb->osb_cluster_stack); 2221 status = -EINVAL; 2222 goto bail; 2223 } 2224 strlcpy(osb->osb_cluster_name, 2225 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2226 OCFS2_CLUSTER_NAME_LEN + 1); 2227 } else { 2228 /* The empty string is identical with classic tools that 2229 * don't know about s_cluster_info. */ 2230 osb->osb_cluster_stack[0] = '\0'; 2231 } 2232 2233 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2234 2235 /* FIXME 2236 * This should be done in ocfs2_journal_init(), but unknown 2237 * ordering issues will cause the filesystem to crash. 2238 * If anyone wants to figure out what part of the code 2239 * refers to osb->journal before ocfs2_journal_init() is run, 2240 * be my guest. 2241 */ 2242 /* initialize our journal structure */ 2243 2244 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2245 if (!journal) { 2246 mlog(ML_ERROR, "unable to alloc journal\n"); 2247 status = -ENOMEM; 2248 goto bail; 2249 } 2250 osb->journal = journal; 2251 journal->j_osb = osb; 2252 2253 atomic_set(&journal->j_num_trans, 0); 2254 init_rwsem(&journal->j_trans_barrier); 2255 init_waitqueue_head(&journal->j_checkpointed); 2256 spin_lock_init(&journal->j_lock); 2257 journal->j_trans_id = (unsigned long) 1; 2258 INIT_LIST_HEAD(&journal->j_la_cleanups); 2259 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2260 journal->j_state = OCFS2_JOURNAL_FREE; 2261 2262 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2263 init_llist_head(&osb->dquot_drop_list); 2264 2265 /* get some pseudo constants for clustersize bits */ 2266 osb->s_clustersize_bits = 2267 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2268 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2269 2270 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2271 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2272 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2273 osb->s_clustersize); 2274 status = -EINVAL; 2275 goto bail; 2276 } 2277 2278 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2279 le32_to_cpu(di->i_clusters)); 2280 2281 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2282 total_blocks); 2283 if (status) { 2284 mlog(ML_ERROR, "Volume too large " 2285 "to mount safely on this system"); 2286 status = -EFBIG; 2287 goto bail; 2288 } 2289 2290 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2291 sizeof(di->id2.i_super.s_uuid))) { 2292 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2293 status = -ENOMEM; 2294 goto bail; 2295 } 2296 2297 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2298 OCFS2_MAX_VOL_LABEL_LEN); 2299 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2300 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2301 osb->first_cluster_group_blkno = 2302 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2303 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2304 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2305 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2306 (unsigned long long)osb->root_blkno, 2307 (unsigned long long)osb->system_dir_blkno, 2308 osb->s_clustersize_bits); 2309 2310 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2311 if (!osb->osb_dlm_debug) { 2312 status = -ENOMEM; 2313 mlog_errno(status); 2314 goto bail; 2315 } 2316 2317 atomic_set(&osb->vol_state, VOLUME_INIT); 2318 2319 /* load root, system_dir, and all global system inodes */ 2320 status = ocfs2_init_global_system_inodes(osb); 2321 if (status < 0) { 2322 mlog_errno(status); 2323 goto bail; 2324 } 2325 2326 /* 2327 * global bitmap 2328 */ 2329 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2330 OCFS2_INVALID_SLOT); 2331 if (!inode) { 2332 status = -EINVAL; 2333 mlog_errno(status); 2334 goto bail; 2335 } 2336 2337 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2338 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2339 iput(inode); 2340 2341 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2342 osb->s_feature_incompat) * 8; 2343 2344 status = ocfs2_init_slot_info(osb); 2345 if (status < 0) { 2346 mlog_errno(status); 2347 goto bail; 2348 } 2349 cleancache_init_shared_fs(sb); 2350 2351 bail: 2352 return status; 2353 } 2354 2355 /* 2356 * will return: -EAGAIN if it is ok to keep searching for superblocks 2357 * -EINVAL if there is a bad superblock 2358 * 0 on success 2359 */ 2360 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2361 struct buffer_head *bh, 2362 u32 blksz, 2363 struct ocfs2_blockcheck_stats *stats) 2364 { 2365 int status = -EAGAIN; 2366 2367 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2368 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2369 /* We have to do a raw check of the feature here */ 2370 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2371 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2372 status = ocfs2_block_check_validate(bh->b_data, 2373 bh->b_size, 2374 &di->i_check, 2375 stats); 2376 if (status) 2377 goto out; 2378 } 2379 status = -EINVAL; 2380 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2381 mlog(ML_ERROR, "found superblock with incorrect block " 2382 "size: found %u, should be %u\n", 2383 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2384 blksz); 2385 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2386 OCFS2_MAJOR_REV_LEVEL || 2387 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2388 OCFS2_MINOR_REV_LEVEL) { 2389 mlog(ML_ERROR, "found superblock with bad version: " 2390 "found %u.%u, should be %u.%u\n", 2391 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2392 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2393 OCFS2_MAJOR_REV_LEVEL, 2394 OCFS2_MINOR_REV_LEVEL); 2395 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2396 mlog(ML_ERROR, "bad block number on superblock: " 2397 "found %llu, should be %llu\n", 2398 (unsigned long long)le64_to_cpu(di->i_blkno), 2399 (unsigned long long)bh->b_blocknr); 2400 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2401 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2402 mlog(ML_ERROR, "bad cluster size found: %u\n", 2403 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2404 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2405 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2406 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2407 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2408 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2409 mlog(ML_ERROR, 2410 "Superblock slots found greater than file system " 2411 "maximum: found %u, max %u\n", 2412 le16_to_cpu(di->id2.i_super.s_max_slots), 2413 OCFS2_MAX_SLOTS); 2414 } else { 2415 /* found it! */ 2416 status = 0; 2417 } 2418 } 2419 2420 out: 2421 if (status && status != -EAGAIN) 2422 mlog_errno(status); 2423 return status; 2424 } 2425 2426 static int ocfs2_check_volume(struct ocfs2_super *osb) 2427 { 2428 int status; 2429 int dirty; 2430 int local; 2431 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2432 * recover 2433 * ourselves. */ 2434 2435 /* Init our journal object. */ 2436 status = ocfs2_journal_init(osb->journal, &dirty); 2437 if (status < 0) { 2438 mlog(ML_ERROR, "Could not initialize journal!\n"); 2439 goto finally; 2440 } 2441 2442 /* Now that journal has been initialized, check to make sure 2443 entire volume is addressable. */ 2444 status = ocfs2_journal_addressable(osb); 2445 if (status) 2446 goto finally; 2447 2448 /* If the journal was unmounted cleanly then we don't want to 2449 * recover anything. Otherwise, journal_load will do that 2450 * dirty work for us :) */ 2451 if (!dirty) { 2452 status = ocfs2_journal_wipe(osb->journal, 0); 2453 if (status < 0) { 2454 mlog_errno(status); 2455 goto finally; 2456 } 2457 } else { 2458 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2459 "unmounted cleanly, recovering it.\n", osb->dev_str); 2460 } 2461 2462 local = ocfs2_mount_local(osb); 2463 2464 /* will play back anything left in the journal. */ 2465 status = ocfs2_journal_load(osb->journal, local, dirty); 2466 if (status < 0) { 2467 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2468 goto finally; 2469 } 2470 2471 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2472 jbd2_journal_set_features(osb->journal->j_journal, 2473 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2474 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2475 else 2476 jbd2_journal_clear_features(osb->journal->j_journal, 2477 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2478 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2479 2480 if (dirty) { 2481 /* recover my local alloc if we didn't unmount cleanly. */ 2482 status = ocfs2_begin_local_alloc_recovery(osb, 2483 osb->slot_num, 2484 &local_alloc); 2485 if (status < 0) { 2486 mlog_errno(status); 2487 goto finally; 2488 } 2489 /* we complete the recovery process after we've marked 2490 * ourselves as mounted. */ 2491 } 2492 2493 status = ocfs2_load_local_alloc(osb); 2494 if (status < 0) { 2495 mlog_errno(status); 2496 goto finally; 2497 } 2498 2499 if (dirty) { 2500 /* Recovery will be completed after we've mounted the 2501 * rest of the volume. */ 2502 osb->dirty = 1; 2503 osb->local_alloc_copy = local_alloc; 2504 local_alloc = NULL; 2505 } 2506 2507 /* go through each journal, trylock it and if you get the 2508 * lock, and it's marked as dirty, set the bit in the recover 2509 * map and launch a recovery thread for it. */ 2510 status = ocfs2_mark_dead_nodes(osb); 2511 if (status < 0) { 2512 mlog_errno(status); 2513 goto finally; 2514 } 2515 2516 status = ocfs2_compute_replay_slots(osb); 2517 if (status < 0) 2518 mlog_errno(status); 2519 2520 finally: 2521 kfree(local_alloc); 2522 2523 if (status) 2524 mlog_errno(status); 2525 return status; 2526 } 2527 2528 /* 2529 * The routine gets called from dismount or close whenever a dismount on 2530 * volume is requested and the osb open count becomes 1. 2531 * It will remove the osb from the global list and also free up all the 2532 * initialized resources and fileobject. 2533 */ 2534 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2535 { 2536 /* This function assumes that the caller has the main osb resource */ 2537 2538 ocfs2_free_slot_info(osb); 2539 2540 kfree(osb->osb_orphan_wipes); 2541 kfree(osb->slot_recovery_generations); 2542 /* FIXME 2543 * This belongs in journal shutdown, but because we have to 2544 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2545 * we free it here. 2546 */ 2547 kfree(osb->journal); 2548 kfree(osb->local_alloc_copy); 2549 kfree(osb->uuid_str); 2550 kfree(osb->vol_label); 2551 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2552 memset(osb, 0, sizeof(struct ocfs2_super)); 2553 } 2554 2555 /* Depending on the mount option passed, perform one of the following: 2556 * Put OCFS2 into a readonly state (default) 2557 * Return EIO so that only the process errs 2558 * Fix the error as if fsck.ocfs2 -y 2559 * panic 2560 */ 2561 static int ocfs2_handle_error(struct super_block *sb) 2562 { 2563 struct ocfs2_super *osb = OCFS2_SB(sb); 2564 int rv = 0; 2565 2566 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2567 pr_crit("On-disk corruption discovered. " 2568 "Please run fsck.ocfs2 once the filesystem is unmounted.\n"); 2569 2570 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) { 2571 panic("OCFS2: (device %s): panic forced after error\n", 2572 sb->s_id); 2573 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) { 2574 pr_crit("OCFS2: Returning error to the calling process.\n"); 2575 rv = -EIO; 2576 } else { /* default option */ 2577 rv = -EROFS; 2578 if (sb->s_flags & MS_RDONLY && 2579 (ocfs2_is_soft_readonly(osb) || 2580 ocfs2_is_hard_readonly(osb))) 2581 return rv; 2582 2583 pr_crit("OCFS2: File system is now read-only.\n"); 2584 sb->s_flags |= MS_RDONLY; 2585 ocfs2_set_ro_flag(osb, 0); 2586 } 2587 2588 return rv; 2589 } 2590 2591 int __ocfs2_error(struct super_block *sb, const char *function, 2592 const char *fmt, ...) 2593 { 2594 struct va_format vaf; 2595 va_list args; 2596 2597 va_start(args, fmt); 2598 vaf.fmt = fmt; 2599 vaf.va = &args; 2600 2601 /* Not using mlog here because we want to show the actual 2602 * function the error came from. */ 2603 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV", 2604 sb->s_id, function, &vaf); 2605 2606 va_end(args); 2607 2608 return ocfs2_handle_error(sb); 2609 } 2610 2611 /* Handle critical errors. This is intentionally more drastic than 2612 * ocfs2_handle_error, so we only use for things like journal errors, 2613 * etc. */ 2614 void __ocfs2_abort(struct super_block *sb, const char *function, 2615 const char *fmt, ...) 2616 { 2617 struct va_format vaf; 2618 va_list args; 2619 2620 va_start(args, fmt); 2621 2622 vaf.fmt = fmt; 2623 vaf.va = &args; 2624 2625 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV", 2626 sb->s_id, function, &vaf); 2627 2628 va_end(args); 2629 2630 /* We don't have the cluster support yet to go straight to 2631 * hard readonly in here. Until then, we want to keep 2632 * ocfs2_abort() so that we can at least mark critical 2633 * errors. 2634 * 2635 * TODO: This should abort the journal and alert other nodes 2636 * that our slot needs recovery. */ 2637 2638 /* Force a panic(). This stinks, but it's better than letting 2639 * things continue without having a proper hard readonly 2640 * here. */ 2641 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2642 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2643 ocfs2_handle_error(sb); 2644 } 2645 2646 /* 2647 * Void signal blockers, because in-kernel sigprocmask() only fails 2648 * when SIG_* is wrong. 2649 */ 2650 void ocfs2_block_signals(sigset_t *oldset) 2651 { 2652 int rc; 2653 sigset_t blocked; 2654 2655 sigfillset(&blocked); 2656 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2657 BUG_ON(rc); 2658 } 2659 2660 void ocfs2_unblock_signals(sigset_t *oldset) 2661 { 2662 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2663 BUG_ON(rc); 2664 } 2665 2666 module_init(ocfs2_init); 2667 module_exit(ocfs2_exit); 2668