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 "ver.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 79 static struct kmem_cache *ocfs2_inode_cachep = NULL; 80 struct kmem_cache *ocfs2_dquot_cachep; 81 struct kmem_cache *ocfs2_qf_chunk_cachep; 82 83 /* OCFS2 needs to schedule several different types of work which 84 * require cluster locking, disk I/O, recovery waits, etc. Since these 85 * types of work tend to be heavy we avoid using the kernel events 86 * workqueue and schedule on our own. */ 87 struct workqueue_struct *ocfs2_wq = NULL; 88 89 static struct dentry *ocfs2_debugfs_root = NULL; 90 91 MODULE_AUTHOR("Oracle"); 92 MODULE_LICENSE("GPL"); 93 94 struct mount_options 95 { 96 unsigned long commit_interval; 97 unsigned long mount_opt; 98 unsigned int atime_quantum; 99 signed short slot; 100 int localalloc_opt; 101 unsigned int resv_level; 102 int dir_resv_level; 103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 104 }; 105 106 static int ocfs2_parse_options(struct super_block *sb, char *options, 107 struct mount_options *mopt, 108 int is_remount); 109 static int ocfs2_check_set_options(struct super_block *sb, 110 struct mount_options *options); 111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 112 static void ocfs2_put_super(struct super_block *sb); 113 static int ocfs2_mount_volume(struct super_block *sb); 114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 116 static int ocfs2_initialize_mem_caches(void); 117 static void ocfs2_free_mem_caches(void); 118 static void ocfs2_delete_osb(struct ocfs2_super *osb); 119 120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 121 122 static int ocfs2_sync_fs(struct super_block *sb, int wait); 123 124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 127 static int ocfs2_check_volume(struct ocfs2_super *osb); 128 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 129 struct buffer_head *bh, 130 u32 sectsize, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_initialize_super(struct super_block *sb, 133 struct buffer_head *bh, 134 int sector_size, 135 struct ocfs2_blockcheck_stats *stats); 136 static int ocfs2_get_sector(struct super_block *sb, 137 struct buffer_head **bh, 138 int block, 139 int sect_size); 140 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 141 static void ocfs2_destroy_inode(struct inode *inode); 142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 143 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 144 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 145 146 static const struct super_operations ocfs2_sops = { 147 .statfs = ocfs2_statfs, 148 .alloc_inode = ocfs2_alloc_inode, 149 .destroy_inode = ocfs2_destroy_inode, 150 .drop_inode = ocfs2_drop_inode, 151 .evict_inode = ocfs2_evict_inode, 152 .sync_fs = ocfs2_sync_fs, 153 .put_super = ocfs2_put_super, 154 .remount_fs = ocfs2_remount, 155 .show_options = ocfs2_show_options, 156 .quota_read = ocfs2_quota_read, 157 .quota_write = ocfs2_quota_write, 158 }; 159 160 enum { 161 Opt_barrier, 162 Opt_err_panic, 163 Opt_err_ro, 164 Opt_intr, 165 Opt_nointr, 166 Opt_hb_none, 167 Opt_hb_local, 168 Opt_hb_global, 169 Opt_data_ordered, 170 Opt_data_writeback, 171 Opt_atime_quantum, 172 Opt_slot, 173 Opt_commit, 174 Opt_localalloc, 175 Opt_localflocks, 176 Opt_stack, 177 Opt_user_xattr, 178 Opt_nouser_xattr, 179 Opt_inode64, 180 Opt_acl, 181 Opt_noacl, 182 Opt_usrquota, 183 Opt_grpquota, 184 Opt_coherency_buffered, 185 Opt_coherency_full, 186 Opt_resv_level, 187 Opt_dir_resv_level, 188 Opt_err, 189 }; 190 191 static const match_table_t tokens = { 192 {Opt_barrier, "barrier=%u"}, 193 {Opt_err_panic, "errors=panic"}, 194 {Opt_err_ro, "errors=remount-ro"}, 195 {Opt_intr, "intr"}, 196 {Opt_nointr, "nointr"}, 197 {Opt_hb_none, OCFS2_HB_NONE}, 198 {Opt_hb_local, OCFS2_HB_LOCAL}, 199 {Opt_hb_global, OCFS2_HB_GLOBAL}, 200 {Opt_data_ordered, "data=ordered"}, 201 {Opt_data_writeback, "data=writeback"}, 202 {Opt_atime_quantum, "atime_quantum=%u"}, 203 {Opt_slot, "preferred_slot=%u"}, 204 {Opt_commit, "commit=%u"}, 205 {Opt_localalloc, "localalloc=%d"}, 206 {Opt_localflocks, "localflocks"}, 207 {Opt_stack, "cluster_stack=%s"}, 208 {Opt_user_xattr, "user_xattr"}, 209 {Opt_nouser_xattr, "nouser_xattr"}, 210 {Opt_inode64, "inode64"}, 211 {Opt_acl, "acl"}, 212 {Opt_noacl, "noacl"}, 213 {Opt_usrquota, "usrquota"}, 214 {Opt_grpquota, "grpquota"}, 215 {Opt_coherency_buffered, "coherency=buffered"}, 216 {Opt_coherency_full, "coherency=full"}, 217 {Opt_resv_level, "resv_level=%u"}, 218 {Opt_dir_resv_level, "dir_resv_level=%u"}, 219 {Opt_err, NULL} 220 }; 221 222 #ifdef CONFIG_DEBUG_FS 223 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 224 { 225 struct ocfs2_cluster_connection *cconn = osb->cconn; 226 struct ocfs2_recovery_map *rm = osb->recovery_map; 227 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 228 int i, out = 0; 229 230 out += snprintf(buf + out, len - out, 231 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 232 "Device", osb->dev_str, osb->uuid_str, 233 osb->fs_generation, osb->vol_label); 234 235 out += snprintf(buf + out, len - out, 236 "%10s => State: %d Flags: 0x%lX\n", "Volume", 237 atomic_read(&osb->vol_state), osb->osb_flags); 238 239 out += snprintf(buf + out, len - out, 240 "%10s => Block: %lu Cluster: %d\n", "Sizes", 241 osb->sb->s_blocksize, osb->s_clustersize); 242 243 out += snprintf(buf + out, len - out, 244 "%10s => Compat: 0x%X Incompat: 0x%X " 245 "ROcompat: 0x%X\n", 246 "Features", osb->s_feature_compat, 247 osb->s_feature_incompat, osb->s_feature_ro_compat); 248 249 out += snprintf(buf + out, len - out, 250 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 251 osb->s_mount_opt, osb->s_atime_quantum); 252 253 if (cconn) { 254 out += snprintf(buf + out, len - out, 255 "%10s => Stack: %s Name: %*s " 256 "Version: %d.%d\n", "Cluster", 257 (*osb->osb_cluster_stack == '\0' ? 258 "o2cb" : osb->osb_cluster_stack), 259 cconn->cc_namelen, cconn->cc_name, 260 cconn->cc_version.pv_major, 261 cconn->cc_version.pv_minor); 262 } 263 264 spin_lock(&osb->dc_task_lock); 265 out += snprintf(buf + out, len - out, 266 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 267 "WorkSeq: %lu\n", "DownCnvt", 268 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 269 osb->blocked_lock_count, osb->dc_wake_sequence, 270 osb->dc_work_sequence); 271 spin_unlock(&osb->dc_task_lock); 272 273 spin_lock(&osb->osb_lock); 274 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 275 "Recovery", 276 (osb->recovery_thread_task ? 277 task_pid_nr(osb->recovery_thread_task) : -1)); 278 if (rm->rm_used == 0) 279 out += snprintf(buf + out, len - out, " None\n"); 280 else { 281 for (i = 0; i < rm->rm_used; i++) 282 out += snprintf(buf + out, len - out, " %d", 283 rm->rm_entries[i]); 284 out += snprintf(buf + out, len - out, "\n"); 285 } 286 spin_unlock(&osb->osb_lock); 287 288 out += snprintf(buf + out, len - out, 289 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 291 osb->osb_commit_interval, 292 atomic_read(&osb->needs_checkpoint)); 293 294 out += snprintf(buf + out, len - out, 295 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 296 "Journal", osb->journal->j_state, 297 osb->journal->j_trans_id, 298 atomic_read(&osb->journal->j_num_trans)); 299 300 out += snprintf(buf + out, len - out, 301 "%10s => GlobalAllocs: %d LocalAllocs: %d " 302 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 303 "Stats", 304 atomic_read(&osb->alloc_stats.bitmap_data), 305 atomic_read(&osb->alloc_stats.local_data), 306 atomic_read(&osb->alloc_stats.bg_allocs), 307 atomic_read(&osb->alloc_stats.moves), 308 atomic_read(&osb->alloc_stats.bg_extends)); 309 310 out += snprintf(buf + out, len - out, 311 "%10s => State: %u Descriptor: %llu Size: %u bits " 312 "Default: %u bits\n", 313 "LocalAlloc", osb->local_alloc_state, 314 (unsigned long long)osb->la_last_gd, 315 osb->local_alloc_bits, osb->local_alloc_default_bits); 316 317 spin_lock(&osb->osb_lock); 318 out += snprintf(buf + out, len - out, 319 "%10s => InodeSlot: %d StolenInodes: %d, " 320 "MetaSlot: %d StolenMeta: %d\n", "Steal", 321 osb->s_inode_steal_slot, 322 atomic_read(&osb->s_num_inodes_stolen), 323 osb->s_meta_steal_slot, 324 atomic_read(&osb->s_num_meta_stolen)); 325 spin_unlock(&osb->osb_lock); 326 327 out += snprintf(buf + out, len - out, "OrphanScan => "); 328 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 329 os->os_count, os->os_seqno); 330 out += snprintf(buf + out, len - out, " Last Scan: "); 331 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 332 out += snprintf(buf + out, len - out, "Disabled\n"); 333 else 334 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 335 (get_seconds() - os->os_scantime.tv_sec)); 336 337 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 338 "Slots", "Num", "RecoGen"); 339 for (i = 0; i < osb->max_slots; ++i) { 340 out += snprintf(buf + out, len - out, 341 "%10s %c %3d %10d\n", 342 " ", 343 (i == osb->slot_num ? '*' : ' '), 344 i, osb->slot_recovery_generations[i]); 345 } 346 347 return out; 348 } 349 350 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 351 { 352 struct ocfs2_super *osb = inode->i_private; 353 char *buf = NULL; 354 355 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 356 if (!buf) 357 goto bail; 358 359 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 360 361 file->private_data = buf; 362 363 return 0; 364 bail: 365 return -ENOMEM; 366 } 367 368 static int ocfs2_debug_release(struct inode *inode, struct file *file) 369 { 370 kfree(file->private_data); 371 return 0; 372 } 373 374 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 375 size_t nbytes, loff_t *ppos) 376 { 377 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 378 i_size_read(file->f_mapping->host)); 379 } 380 #else 381 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 382 { 383 return 0; 384 } 385 static int ocfs2_debug_release(struct inode *inode, struct file *file) 386 { 387 return 0; 388 } 389 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 390 size_t nbytes, loff_t *ppos) 391 { 392 return 0; 393 } 394 #endif /* CONFIG_DEBUG_FS */ 395 396 static const struct file_operations ocfs2_osb_debug_fops = { 397 .open = ocfs2_osb_debug_open, 398 .release = ocfs2_debug_release, 399 .read = ocfs2_debug_read, 400 .llseek = generic_file_llseek, 401 }; 402 403 static int ocfs2_sync_fs(struct super_block *sb, int wait) 404 { 405 int status; 406 tid_t target; 407 struct ocfs2_super *osb = OCFS2_SB(sb); 408 409 if (ocfs2_is_hard_readonly(osb)) 410 return -EROFS; 411 412 if (wait) { 413 status = ocfs2_flush_truncate_log(osb); 414 if (status < 0) 415 mlog_errno(status); 416 } else { 417 ocfs2_schedule_truncate_log_flush(osb, 0); 418 } 419 420 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 421 &target)) { 422 if (wait) 423 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 424 target); 425 } 426 return 0; 427 } 428 429 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 430 { 431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 432 && (ino == USER_QUOTA_SYSTEM_INODE 433 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 434 return 0; 435 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 436 && (ino == GROUP_QUOTA_SYSTEM_INODE 437 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 438 return 0; 439 return 1; 440 } 441 442 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 443 { 444 struct inode *new = NULL; 445 int status = 0; 446 int i; 447 448 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 449 if (IS_ERR(new)) { 450 status = PTR_ERR(new); 451 mlog_errno(status); 452 goto bail; 453 } 454 osb->root_inode = new; 455 456 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 457 if (IS_ERR(new)) { 458 status = PTR_ERR(new); 459 mlog_errno(status); 460 goto bail; 461 } 462 osb->sys_root_inode = new; 463 464 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 465 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 466 if (!ocfs2_need_system_inode(osb, i)) 467 continue; 468 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 469 if (!new) { 470 ocfs2_release_system_inodes(osb); 471 status = -EINVAL; 472 mlog_errno(status); 473 /* FIXME: Should ERROR_RO_FS */ 474 mlog(ML_ERROR, "Unable to load system inode %d, " 475 "possibly corrupt fs?", i); 476 goto bail; 477 } 478 // the array now has one ref, so drop this one 479 iput(new); 480 } 481 482 bail: 483 if (status) 484 mlog_errno(status); 485 return status; 486 } 487 488 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 489 { 490 struct inode *new = NULL; 491 int status = 0; 492 int i; 493 494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 495 i < NUM_SYSTEM_INODES; 496 i++) { 497 if (!ocfs2_need_system_inode(osb, i)) 498 continue; 499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 500 if (!new) { 501 ocfs2_release_system_inodes(osb); 502 status = -EINVAL; 503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 504 status, i, osb->slot_num); 505 goto bail; 506 } 507 /* the array now has one ref, so drop this one */ 508 iput(new); 509 } 510 511 bail: 512 if (status) 513 mlog_errno(status); 514 return status; 515 } 516 517 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 518 { 519 int i; 520 struct inode *inode; 521 522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 523 inode = osb->global_system_inodes[i]; 524 if (inode) { 525 iput(inode); 526 osb->global_system_inodes[i] = NULL; 527 } 528 } 529 530 inode = osb->sys_root_inode; 531 if (inode) { 532 iput(inode); 533 osb->sys_root_inode = NULL; 534 } 535 536 inode = osb->root_inode; 537 if (inode) { 538 iput(inode); 539 osb->root_inode = NULL; 540 } 541 542 if (!osb->local_system_inodes) 543 return; 544 545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 546 if (osb->local_system_inodes[i]) { 547 iput(osb->local_system_inodes[i]); 548 osb->local_system_inodes[i] = NULL; 549 } 550 } 551 552 kfree(osb->local_system_inodes); 553 osb->local_system_inodes = NULL; 554 } 555 556 /* We're allocating fs objects, use GFP_NOFS */ 557 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 558 { 559 struct ocfs2_inode_info *oi; 560 561 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 562 if (!oi) 563 return NULL; 564 565 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 566 return &oi->vfs_inode; 567 } 568 569 static void ocfs2_i_callback(struct rcu_head *head) 570 { 571 struct inode *inode = container_of(head, struct inode, i_rcu); 572 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 573 } 574 575 static void ocfs2_destroy_inode(struct inode *inode) 576 { 577 call_rcu(&inode->i_rcu, ocfs2_i_callback); 578 } 579 580 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 581 unsigned int cbits) 582 { 583 unsigned int bytes = 1 << cbits; 584 unsigned int trim = bytes; 585 unsigned int bitshift = 32; 586 587 /* 588 * i_size and all block offsets in ocfs2 are always 64 bits 589 * wide. i_clusters is 32 bits, in cluster-sized units. So on 590 * 64 bit platforms, cluster size will be the limiting factor. 591 */ 592 593 #if BITS_PER_LONG == 32 594 # if defined(CONFIG_LBDAF) 595 BUILD_BUG_ON(sizeof(sector_t) != 8); 596 /* 597 * We might be limited by page cache size. 598 */ 599 if (bytes > PAGE_CACHE_SIZE) { 600 bytes = PAGE_CACHE_SIZE; 601 trim = 1; 602 /* 603 * Shift by 31 here so that we don't get larger than 604 * MAX_LFS_FILESIZE 605 */ 606 bitshift = 31; 607 } 608 # else 609 /* 610 * We are limited by the size of sector_t. Use block size, as 611 * that's what we expose to the VFS. 612 */ 613 bytes = 1 << bbits; 614 trim = 1; 615 bitshift = 31; 616 # endif 617 #endif 618 619 /* 620 * Trim by a whole cluster when we can actually approach the 621 * on-disk limits. Otherwise we can overflow i_clusters when 622 * an extent start is at the max offset. 623 */ 624 return (((unsigned long long)bytes) << bitshift) - trim; 625 } 626 627 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 628 { 629 int incompat_features; 630 int ret = 0; 631 struct mount_options parsed_options; 632 struct ocfs2_super *osb = OCFS2_SB(sb); 633 u32 tmp; 634 635 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 636 !ocfs2_check_set_options(sb, &parsed_options)) { 637 ret = -EINVAL; 638 goto out; 639 } 640 641 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 642 OCFS2_MOUNT_HB_NONE; 643 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 644 ret = -EINVAL; 645 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 646 goto out; 647 } 648 649 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 650 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 651 ret = -EINVAL; 652 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 653 goto out; 654 } 655 656 /* Probably don't want this on remount; it might 657 * mess with other nodes */ 658 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 659 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 660 ret = -EINVAL; 661 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 662 goto out; 663 } 664 665 /* We're going to/from readonly mode. */ 666 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 667 /* Disable quota accounting before remounting RO */ 668 if (*flags & MS_RDONLY) { 669 ret = ocfs2_susp_quotas(osb, 0); 670 if (ret < 0) 671 goto out; 672 } 673 /* Lock here so the check of HARD_RO and the potential 674 * setting of SOFT_RO is atomic. */ 675 spin_lock(&osb->osb_lock); 676 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 677 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 678 ret = -EROFS; 679 goto unlock_osb; 680 } 681 682 if (*flags & MS_RDONLY) { 683 sb->s_flags |= MS_RDONLY; 684 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 685 } else { 686 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 687 mlog(ML_ERROR, "Cannot remount RDWR " 688 "filesystem due to previous errors.\n"); 689 ret = -EROFS; 690 goto unlock_osb; 691 } 692 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 693 if (incompat_features) { 694 mlog(ML_ERROR, "Cannot remount RDWR because " 695 "of unsupported optional features " 696 "(%x).\n", incompat_features); 697 ret = -EINVAL; 698 goto unlock_osb; 699 } 700 sb->s_flags &= ~MS_RDONLY; 701 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 702 } 703 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 704 unlock_osb: 705 spin_unlock(&osb->osb_lock); 706 /* Enable quota accounting after remounting RW */ 707 if (!ret && !(*flags & MS_RDONLY)) { 708 if (sb_any_quota_suspended(sb)) 709 ret = ocfs2_susp_quotas(osb, 1); 710 else 711 ret = ocfs2_enable_quotas(osb); 712 if (ret < 0) { 713 /* Return back changes... */ 714 spin_lock(&osb->osb_lock); 715 sb->s_flags |= MS_RDONLY; 716 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 717 spin_unlock(&osb->osb_lock); 718 goto out; 719 } 720 } 721 } 722 723 if (!ret) { 724 /* Only save off the new mount options in case of a successful 725 * remount. */ 726 osb->s_mount_opt = parsed_options.mount_opt; 727 osb->s_atime_quantum = parsed_options.atime_quantum; 728 osb->preferred_slot = parsed_options.slot; 729 if (parsed_options.commit_interval) 730 osb->osb_commit_interval = parsed_options.commit_interval; 731 732 if (!ocfs2_is_hard_readonly(osb)) 733 ocfs2_set_journal_params(osb); 734 735 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 736 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 737 MS_POSIXACL : 0); 738 } 739 out: 740 return ret; 741 } 742 743 static int ocfs2_sb_probe(struct super_block *sb, 744 struct buffer_head **bh, 745 int *sector_size, 746 struct ocfs2_blockcheck_stats *stats) 747 { 748 int status, tmpstat; 749 struct ocfs1_vol_disk_hdr *hdr; 750 struct ocfs2_dinode *di; 751 int blksize; 752 753 *bh = NULL; 754 755 /* may be > 512 */ 756 *sector_size = bdev_logical_block_size(sb->s_bdev); 757 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 758 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 759 *sector_size, OCFS2_MAX_BLOCKSIZE); 760 status = -EINVAL; 761 goto bail; 762 } 763 764 /* Can this really happen? */ 765 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 766 *sector_size = OCFS2_MIN_BLOCKSIZE; 767 768 /* check block zero for old format */ 769 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 770 if (status < 0) { 771 mlog_errno(status); 772 goto bail; 773 } 774 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 775 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 776 mlog(ML_ERROR, "incompatible version: %u.%u\n", 777 hdr->major_version, hdr->minor_version); 778 status = -EINVAL; 779 } 780 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 781 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 782 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 783 hdr->signature); 784 status = -EINVAL; 785 } 786 brelse(*bh); 787 *bh = NULL; 788 if (status < 0) { 789 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 790 "upgraded before mounting with ocfs v2\n"); 791 goto bail; 792 } 793 794 /* 795 * Now check at magic offset for 512, 1024, 2048, 4096 796 * blocksizes. 4096 is the maximum blocksize because it is 797 * the minimum clustersize. 798 */ 799 status = -EINVAL; 800 for (blksize = *sector_size; 801 blksize <= OCFS2_MAX_BLOCKSIZE; 802 blksize <<= 1) { 803 tmpstat = ocfs2_get_sector(sb, bh, 804 OCFS2_SUPER_BLOCK_BLKNO, 805 blksize); 806 if (tmpstat < 0) { 807 status = tmpstat; 808 mlog_errno(status); 809 break; 810 } 811 di = (struct ocfs2_dinode *) (*bh)->b_data; 812 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 813 spin_lock_init(&stats->b_lock); 814 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 815 if (tmpstat < 0) { 816 brelse(*bh); 817 *bh = NULL; 818 } 819 if (tmpstat != -EAGAIN) { 820 status = tmpstat; 821 break; 822 } 823 } 824 825 bail: 826 return status; 827 } 828 829 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 830 { 831 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 832 833 if (osb->s_mount_opt & hb_enabled) { 834 if (ocfs2_mount_local(osb)) { 835 mlog(ML_ERROR, "Cannot heartbeat on a locally " 836 "mounted device.\n"); 837 return -EINVAL; 838 } 839 if (ocfs2_userspace_stack(osb)) { 840 mlog(ML_ERROR, "Userspace stack expected, but " 841 "o2cb heartbeat arguments passed to mount\n"); 842 return -EINVAL; 843 } 844 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 845 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 846 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 847 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 848 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 849 return -EINVAL; 850 } 851 } 852 853 if (!(osb->s_mount_opt & hb_enabled)) { 854 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 855 !ocfs2_userspace_stack(osb)) { 856 mlog(ML_ERROR, "Heartbeat has to be started to mount " 857 "a read-write clustered device.\n"); 858 return -EINVAL; 859 } 860 } 861 862 return 0; 863 } 864 865 /* 866 * If we're using a userspace stack, mount should have passed 867 * a name that matches the disk. If not, mount should not 868 * have passed a stack. 869 */ 870 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 871 struct mount_options *mopt) 872 { 873 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 874 mlog(ML_ERROR, 875 "cluster stack passed to mount, but this filesystem " 876 "does not support it\n"); 877 return -EINVAL; 878 } 879 880 if (ocfs2_userspace_stack(osb) && 881 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 882 OCFS2_STACK_LABEL_LEN)) { 883 mlog(ML_ERROR, 884 "cluster stack passed to mount (\"%s\") does not " 885 "match the filesystem (\"%s\")\n", 886 mopt->cluster_stack, 887 osb->osb_cluster_stack); 888 return -EINVAL; 889 } 890 891 return 0; 892 } 893 894 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 895 { 896 int type; 897 struct super_block *sb = osb->sb; 898 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 899 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 900 int status = 0; 901 902 for (type = 0; type < MAXQUOTAS; type++) { 903 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 904 continue; 905 if (unsuspend) 906 status = dquot_resume(sb, type); 907 else { 908 struct ocfs2_mem_dqinfo *oinfo; 909 910 /* Cancel periodic syncing before suspending */ 911 oinfo = sb_dqinfo(sb, type)->dqi_priv; 912 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 913 status = dquot_suspend(sb, type); 914 } 915 if (status < 0) 916 break; 917 } 918 if (status < 0) 919 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 920 "remount (error = %d).\n", status); 921 return status; 922 } 923 924 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 925 { 926 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 927 struct super_block *sb = osb->sb; 928 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 929 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 930 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 931 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 932 int status; 933 int type; 934 935 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 936 for (type = 0; type < MAXQUOTAS; type++) { 937 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 938 continue; 939 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 940 osb->slot_num); 941 if (!inode[type]) { 942 status = -ENOENT; 943 goto out_quota_off; 944 } 945 status = dquot_enable(inode[type], type, QFMT_OCFS2, 946 DQUOT_USAGE_ENABLED); 947 if (status < 0) 948 goto out_quota_off; 949 } 950 951 for (type = 0; type < MAXQUOTAS; type++) 952 iput(inode[type]); 953 return 0; 954 out_quota_off: 955 ocfs2_disable_quotas(osb); 956 for (type = 0; type < MAXQUOTAS; type++) 957 iput(inode[type]); 958 mlog_errno(status); 959 return status; 960 } 961 962 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 963 { 964 int type; 965 struct inode *inode; 966 struct super_block *sb = osb->sb; 967 struct ocfs2_mem_dqinfo *oinfo; 968 969 /* We mostly ignore errors in this function because there's not much 970 * we can do when we see them */ 971 for (type = 0; type < MAXQUOTAS; type++) { 972 if (!sb_has_quota_loaded(sb, type)) 973 continue; 974 /* Cancel periodic syncing before we grab dqonoff_mutex */ 975 oinfo = sb_dqinfo(sb, type)->dqi_priv; 976 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 977 inode = igrab(sb->s_dquot.files[type]); 978 /* Turn off quotas. This will remove all dquot structures from 979 * memory and so they will be automatically synced to global 980 * quota files */ 981 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 982 DQUOT_LIMITS_ENABLED); 983 if (!inode) 984 continue; 985 iput(inode); 986 } 987 } 988 989 /* Handle quota on quotactl */ 990 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id) 991 { 992 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 993 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 994 995 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 996 return -EINVAL; 997 998 return dquot_enable(sb_dqopt(sb)->files[type], type, 999 format_id, DQUOT_LIMITS_ENABLED); 1000 } 1001 1002 /* Handle quota off quotactl */ 1003 static int ocfs2_quota_off(struct super_block *sb, int type) 1004 { 1005 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 1006 } 1007 1008 static const struct quotactl_ops ocfs2_quotactl_ops = { 1009 .quota_on_meta = ocfs2_quota_on, 1010 .quota_off = ocfs2_quota_off, 1011 .quota_sync = dquot_quota_sync, 1012 .get_info = dquot_get_dqinfo, 1013 .set_info = dquot_set_dqinfo, 1014 .get_dqblk = dquot_get_dqblk, 1015 .set_dqblk = dquot_set_dqblk, 1016 }; 1017 1018 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1019 { 1020 struct dentry *root; 1021 int status, sector_size; 1022 struct mount_options parsed_options; 1023 struct inode *inode = NULL; 1024 struct ocfs2_super *osb = NULL; 1025 struct buffer_head *bh = NULL; 1026 char nodestr[8]; 1027 struct ocfs2_blockcheck_stats stats; 1028 1029 trace_ocfs2_fill_super(sb, data, silent); 1030 1031 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1032 status = -EINVAL; 1033 goto read_super_error; 1034 } 1035 1036 /* probe for superblock */ 1037 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1038 if (status < 0) { 1039 mlog(ML_ERROR, "superblock probe failed!\n"); 1040 goto read_super_error; 1041 } 1042 1043 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1044 osb = OCFS2_SB(sb); 1045 if (status < 0) { 1046 mlog_errno(status); 1047 goto read_super_error; 1048 } 1049 brelse(bh); 1050 bh = NULL; 1051 1052 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1053 status = -EINVAL; 1054 goto read_super_error; 1055 } 1056 osb->s_mount_opt = parsed_options.mount_opt; 1057 osb->s_atime_quantum = parsed_options.atime_quantum; 1058 osb->preferred_slot = parsed_options.slot; 1059 osb->osb_commit_interval = parsed_options.commit_interval; 1060 1061 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1062 osb->osb_resv_level = parsed_options.resv_level; 1063 osb->osb_dir_resv_level = parsed_options.resv_level; 1064 if (parsed_options.dir_resv_level == -1) 1065 osb->osb_dir_resv_level = parsed_options.resv_level; 1066 else 1067 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1068 1069 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1070 if (status) 1071 goto read_super_error; 1072 1073 sb->s_magic = OCFS2_SUPER_MAGIC; 1074 1075 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1076 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1077 1078 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1079 * heartbeat=none */ 1080 if (bdev_read_only(sb->s_bdev)) { 1081 if (!(sb->s_flags & MS_RDONLY)) { 1082 status = -EACCES; 1083 mlog(ML_ERROR, "Readonly device detected but readonly " 1084 "mount was not specified.\n"); 1085 goto read_super_error; 1086 } 1087 1088 /* You should not be able to start a local heartbeat 1089 * on a readonly device. */ 1090 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1091 status = -EROFS; 1092 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1093 "device.\n"); 1094 goto read_super_error; 1095 } 1096 1097 status = ocfs2_check_journals_nolocks(osb); 1098 if (status < 0) { 1099 if (status == -EROFS) 1100 mlog(ML_ERROR, "Recovery required on readonly " 1101 "file system, but write access is " 1102 "unavailable.\n"); 1103 else 1104 mlog_errno(status); 1105 goto read_super_error; 1106 } 1107 1108 ocfs2_set_ro_flag(osb, 1); 1109 1110 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1111 "Cluster services will not be used for this mount. " 1112 "Recovery will be skipped.\n", osb->dev_str); 1113 } 1114 1115 if (!ocfs2_is_hard_readonly(osb)) { 1116 if (sb->s_flags & MS_RDONLY) 1117 ocfs2_set_ro_flag(osb, 0); 1118 } 1119 1120 status = ocfs2_verify_heartbeat(osb); 1121 if (status < 0) { 1122 mlog_errno(status); 1123 goto read_super_error; 1124 } 1125 1126 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1127 ocfs2_debugfs_root); 1128 if (!osb->osb_debug_root) { 1129 status = -EINVAL; 1130 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1131 goto read_super_error; 1132 } 1133 1134 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1135 osb->osb_debug_root, 1136 osb, 1137 &ocfs2_osb_debug_fops); 1138 if (!osb->osb_ctxt) { 1139 status = -EINVAL; 1140 mlog_errno(status); 1141 goto read_super_error; 1142 } 1143 1144 if (ocfs2_meta_ecc(osb)) { 1145 status = ocfs2_blockcheck_stats_debugfs_install( 1146 &osb->osb_ecc_stats, 1147 osb->osb_debug_root); 1148 if (status) { 1149 mlog(ML_ERROR, 1150 "Unable to create blockcheck statistics " 1151 "files\n"); 1152 goto read_super_error; 1153 } 1154 } 1155 1156 status = ocfs2_mount_volume(sb); 1157 if (status < 0) 1158 goto read_super_error; 1159 1160 if (osb->root_inode) 1161 inode = igrab(osb->root_inode); 1162 1163 if (!inode) { 1164 status = -EIO; 1165 mlog_errno(status); 1166 goto read_super_error; 1167 } 1168 1169 root = d_make_root(inode); 1170 if (!root) { 1171 status = -ENOMEM; 1172 mlog_errno(status); 1173 goto read_super_error; 1174 } 1175 1176 sb->s_root = root; 1177 1178 ocfs2_complete_mount_recovery(osb); 1179 1180 if (ocfs2_mount_local(osb)) 1181 snprintf(nodestr, sizeof(nodestr), "local"); 1182 else 1183 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1184 1185 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1186 "with %s data mode.\n", 1187 osb->dev_str, nodestr, osb->slot_num, 1188 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1189 "ordered"); 1190 1191 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1192 wake_up(&osb->osb_mount_event); 1193 1194 /* Now we can initialize quotas because we can afford to wait 1195 * for cluster locks recovery now. That also means that truncation 1196 * log recovery can happen but that waits for proper quota setup */ 1197 if (!(sb->s_flags & MS_RDONLY)) { 1198 status = ocfs2_enable_quotas(osb); 1199 if (status < 0) { 1200 /* We have to err-out specially here because 1201 * s_root is already set */ 1202 mlog_errno(status); 1203 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1204 wake_up(&osb->osb_mount_event); 1205 return status; 1206 } 1207 } 1208 1209 ocfs2_complete_quota_recovery(osb); 1210 1211 /* Now we wake up again for processes waiting for quotas */ 1212 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1213 wake_up(&osb->osb_mount_event); 1214 1215 /* Start this when the mount is almost sure of being successful */ 1216 ocfs2_orphan_scan_start(osb); 1217 1218 return status; 1219 1220 read_super_error: 1221 brelse(bh); 1222 1223 if (osb) { 1224 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1225 wake_up(&osb->osb_mount_event); 1226 ocfs2_dismount_volume(sb, 1); 1227 } 1228 1229 if (status) 1230 mlog_errno(status); 1231 return status; 1232 } 1233 1234 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1235 int flags, 1236 const char *dev_name, 1237 void *data) 1238 { 1239 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1240 } 1241 1242 static void ocfs2_kill_sb(struct super_block *sb) 1243 { 1244 struct ocfs2_super *osb = OCFS2_SB(sb); 1245 1246 /* Failed mount? */ 1247 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1248 goto out; 1249 1250 /* Prevent further queueing of inode drop events */ 1251 spin_lock(&dentry_list_lock); 1252 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1253 spin_unlock(&dentry_list_lock); 1254 /* Wait for work to finish and/or remove it */ 1255 cancel_work_sync(&osb->dentry_lock_work); 1256 out: 1257 kill_block_super(sb); 1258 } 1259 1260 static struct file_system_type ocfs2_fs_type = { 1261 .owner = THIS_MODULE, 1262 .name = "ocfs2", 1263 .mount = ocfs2_mount, 1264 .kill_sb = ocfs2_kill_sb, 1265 1266 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1267 .next = NULL 1268 }; 1269 MODULE_ALIAS_FS("ocfs2"); 1270 1271 static int ocfs2_check_set_options(struct super_block *sb, 1272 struct mount_options *options) 1273 { 1274 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1275 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1276 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1277 mlog(ML_ERROR, "User quotas were requested, but this " 1278 "filesystem does not have the feature enabled.\n"); 1279 return 0; 1280 } 1281 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1282 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1283 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1284 mlog(ML_ERROR, "Group quotas were requested, but this " 1285 "filesystem does not have the feature enabled.\n"); 1286 return 0; 1287 } 1288 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1289 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1290 mlog(ML_ERROR, "ACL support requested but extended attributes " 1291 "feature is not enabled\n"); 1292 return 0; 1293 } 1294 /* No ACL setting specified? Use XATTR feature... */ 1295 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1296 OCFS2_MOUNT_NO_POSIX_ACL))) { 1297 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1298 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1299 else 1300 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1301 } 1302 return 1; 1303 } 1304 1305 static int ocfs2_parse_options(struct super_block *sb, 1306 char *options, 1307 struct mount_options *mopt, 1308 int is_remount) 1309 { 1310 int status, user_stack = 0; 1311 char *p; 1312 u32 tmp; 1313 1314 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1315 1316 mopt->commit_interval = 0; 1317 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1318 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1319 mopt->slot = OCFS2_INVALID_SLOT; 1320 mopt->localalloc_opt = -1; 1321 mopt->cluster_stack[0] = '\0'; 1322 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1323 mopt->dir_resv_level = -1; 1324 1325 if (!options) { 1326 status = 1; 1327 goto bail; 1328 } 1329 1330 while ((p = strsep(&options, ",")) != NULL) { 1331 int token, option; 1332 substring_t args[MAX_OPT_ARGS]; 1333 1334 if (!*p) 1335 continue; 1336 1337 token = match_token(p, tokens, args); 1338 switch (token) { 1339 case Opt_hb_local: 1340 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1341 break; 1342 case Opt_hb_none: 1343 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1344 break; 1345 case Opt_hb_global: 1346 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1347 break; 1348 case Opt_barrier: 1349 if (match_int(&args[0], &option)) { 1350 status = 0; 1351 goto bail; 1352 } 1353 if (option) 1354 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1355 else 1356 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1357 break; 1358 case Opt_intr: 1359 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1360 break; 1361 case Opt_nointr: 1362 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1363 break; 1364 case Opt_err_panic: 1365 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1366 break; 1367 case Opt_err_ro: 1368 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1369 break; 1370 case Opt_data_ordered: 1371 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1372 break; 1373 case Opt_data_writeback: 1374 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1375 break; 1376 case Opt_user_xattr: 1377 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1378 break; 1379 case Opt_nouser_xattr: 1380 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1381 break; 1382 case Opt_atime_quantum: 1383 if (match_int(&args[0], &option)) { 1384 status = 0; 1385 goto bail; 1386 } 1387 if (option >= 0) 1388 mopt->atime_quantum = option; 1389 break; 1390 case Opt_slot: 1391 option = 0; 1392 if (match_int(&args[0], &option)) { 1393 status = 0; 1394 goto bail; 1395 } 1396 if (option) 1397 mopt->slot = (s16)option; 1398 break; 1399 case Opt_commit: 1400 option = 0; 1401 if (match_int(&args[0], &option)) { 1402 status = 0; 1403 goto bail; 1404 } 1405 if (option < 0) 1406 return 0; 1407 if (option == 0) 1408 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1409 mopt->commit_interval = HZ * option; 1410 break; 1411 case Opt_localalloc: 1412 option = 0; 1413 if (match_int(&args[0], &option)) { 1414 status = 0; 1415 goto bail; 1416 } 1417 if (option >= 0) 1418 mopt->localalloc_opt = option; 1419 break; 1420 case Opt_localflocks: 1421 /* 1422 * Changing this during remount could race 1423 * flock() requests, or "unbalance" existing 1424 * ones (e.g., a lock is taken in one mode but 1425 * dropped in the other). If users care enough 1426 * to flip locking modes during remount, we 1427 * could add a "local" flag to individual 1428 * flock structures for proper tracking of 1429 * state. 1430 */ 1431 if (!is_remount) 1432 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1433 break; 1434 case Opt_stack: 1435 /* Check both that the option we were passed 1436 * is of the right length and that it is a proper 1437 * string of the right length. 1438 */ 1439 if (((args[0].to - args[0].from) != 1440 OCFS2_STACK_LABEL_LEN) || 1441 (strnlen(args[0].from, 1442 OCFS2_STACK_LABEL_LEN) != 1443 OCFS2_STACK_LABEL_LEN)) { 1444 mlog(ML_ERROR, 1445 "Invalid cluster_stack option\n"); 1446 status = 0; 1447 goto bail; 1448 } 1449 memcpy(mopt->cluster_stack, args[0].from, 1450 OCFS2_STACK_LABEL_LEN); 1451 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1452 /* 1453 * Open code the memcmp here as we don't have 1454 * an osb to pass to 1455 * ocfs2_userspace_stack(). 1456 */ 1457 if (memcmp(mopt->cluster_stack, 1458 OCFS2_CLASSIC_CLUSTER_STACK, 1459 OCFS2_STACK_LABEL_LEN)) 1460 user_stack = 1; 1461 break; 1462 case Opt_inode64: 1463 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1464 break; 1465 case Opt_usrquota: 1466 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1467 break; 1468 case Opt_grpquota: 1469 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1470 break; 1471 case Opt_coherency_buffered: 1472 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1473 break; 1474 case Opt_coherency_full: 1475 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1476 break; 1477 case Opt_acl: 1478 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1479 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1480 break; 1481 case Opt_noacl: 1482 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1483 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1484 break; 1485 case Opt_resv_level: 1486 if (is_remount) 1487 break; 1488 if (match_int(&args[0], &option)) { 1489 status = 0; 1490 goto bail; 1491 } 1492 if (option >= OCFS2_MIN_RESV_LEVEL && 1493 option < OCFS2_MAX_RESV_LEVEL) 1494 mopt->resv_level = option; 1495 break; 1496 case Opt_dir_resv_level: 1497 if (is_remount) 1498 break; 1499 if (match_int(&args[0], &option)) { 1500 status = 0; 1501 goto bail; 1502 } 1503 if (option >= OCFS2_MIN_RESV_LEVEL && 1504 option < OCFS2_MAX_RESV_LEVEL) 1505 mopt->dir_resv_level = option; 1506 break; 1507 default: 1508 mlog(ML_ERROR, 1509 "Unrecognized mount option \"%s\" " 1510 "or missing value\n", p); 1511 status = 0; 1512 goto bail; 1513 } 1514 } 1515 1516 if (user_stack == 0) { 1517 /* Ensure only one heartbeat mode */ 1518 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1519 OCFS2_MOUNT_HB_GLOBAL | 1520 OCFS2_MOUNT_HB_NONE); 1521 if (hweight32(tmp) != 1) { 1522 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1523 status = 0; 1524 goto bail; 1525 } 1526 } 1527 1528 status = 1; 1529 1530 bail: 1531 return status; 1532 } 1533 1534 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1535 { 1536 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1537 unsigned long opts = osb->s_mount_opt; 1538 unsigned int local_alloc_megs; 1539 1540 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1541 seq_printf(s, ",_netdev"); 1542 if (opts & OCFS2_MOUNT_HB_LOCAL) 1543 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1544 else 1545 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1546 } else 1547 seq_printf(s, ",%s", OCFS2_HB_NONE); 1548 1549 if (opts & OCFS2_MOUNT_NOINTR) 1550 seq_printf(s, ",nointr"); 1551 1552 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1553 seq_printf(s, ",data=writeback"); 1554 else 1555 seq_printf(s, ",data=ordered"); 1556 1557 if (opts & OCFS2_MOUNT_BARRIER) 1558 seq_printf(s, ",barrier=1"); 1559 1560 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1561 seq_printf(s, ",errors=panic"); 1562 else 1563 seq_printf(s, ",errors=remount-ro"); 1564 1565 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1566 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1567 1568 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1569 1570 if (osb->osb_commit_interval) 1571 seq_printf(s, ",commit=%u", 1572 (unsigned) (osb->osb_commit_interval / HZ)); 1573 1574 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1575 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1576 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1577 1578 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1579 seq_printf(s, ",localflocks,"); 1580 1581 if (osb->osb_cluster_stack[0]) 1582 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1583 osb->osb_cluster_stack); 1584 if (opts & OCFS2_MOUNT_USRQUOTA) 1585 seq_printf(s, ",usrquota"); 1586 if (opts & OCFS2_MOUNT_GRPQUOTA) 1587 seq_printf(s, ",grpquota"); 1588 1589 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1590 seq_printf(s, ",coherency=buffered"); 1591 else 1592 seq_printf(s, ",coherency=full"); 1593 1594 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1595 seq_printf(s, ",nouser_xattr"); 1596 else 1597 seq_printf(s, ",user_xattr"); 1598 1599 if (opts & OCFS2_MOUNT_INODE64) 1600 seq_printf(s, ",inode64"); 1601 1602 if (opts & OCFS2_MOUNT_POSIX_ACL) 1603 seq_printf(s, ",acl"); 1604 else 1605 seq_printf(s, ",noacl"); 1606 1607 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1608 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1609 1610 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1611 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1612 1613 return 0; 1614 } 1615 1616 wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; 1617 1618 static int __init ocfs2_init(void) 1619 { 1620 int status, i; 1621 1622 ocfs2_print_version(); 1623 1624 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++) 1625 init_waitqueue_head(&ocfs2__ioend_wq[i]); 1626 1627 status = init_ocfs2_uptodate_cache(); 1628 if (status < 0) 1629 goto out1; 1630 1631 status = ocfs2_initialize_mem_caches(); 1632 if (status < 0) 1633 goto out2; 1634 1635 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1636 if (!ocfs2_wq) { 1637 status = -ENOMEM; 1638 goto out3; 1639 } 1640 1641 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1642 if (!ocfs2_debugfs_root) { 1643 status = -EFAULT; 1644 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1645 } 1646 1647 ocfs2_set_locking_protocol(); 1648 1649 status = register_quota_format(&ocfs2_quota_format); 1650 if (status < 0) 1651 goto out4; 1652 status = register_filesystem(&ocfs2_fs_type); 1653 if (!status) 1654 return 0; 1655 1656 unregister_quota_format(&ocfs2_quota_format); 1657 out4: 1658 destroy_workqueue(ocfs2_wq); 1659 debugfs_remove(ocfs2_debugfs_root); 1660 out3: 1661 ocfs2_free_mem_caches(); 1662 out2: 1663 exit_ocfs2_uptodate_cache(); 1664 out1: 1665 mlog_errno(status); 1666 return status; 1667 } 1668 1669 static void __exit ocfs2_exit(void) 1670 { 1671 if (ocfs2_wq) { 1672 flush_workqueue(ocfs2_wq); 1673 destroy_workqueue(ocfs2_wq); 1674 } 1675 1676 unregister_quota_format(&ocfs2_quota_format); 1677 1678 debugfs_remove(ocfs2_debugfs_root); 1679 1680 ocfs2_free_mem_caches(); 1681 1682 unregister_filesystem(&ocfs2_fs_type); 1683 1684 exit_ocfs2_uptodate_cache(); 1685 } 1686 1687 static void ocfs2_put_super(struct super_block *sb) 1688 { 1689 trace_ocfs2_put_super(sb); 1690 1691 ocfs2_sync_blockdev(sb); 1692 ocfs2_dismount_volume(sb, 0); 1693 } 1694 1695 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1696 { 1697 struct ocfs2_super *osb; 1698 u32 numbits, freebits; 1699 int status; 1700 struct ocfs2_dinode *bm_lock; 1701 struct buffer_head *bh = NULL; 1702 struct inode *inode = NULL; 1703 1704 trace_ocfs2_statfs(dentry->d_sb, buf); 1705 1706 osb = OCFS2_SB(dentry->d_sb); 1707 1708 inode = ocfs2_get_system_file_inode(osb, 1709 GLOBAL_BITMAP_SYSTEM_INODE, 1710 OCFS2_INVALID_SLOT); 1711 if (!inode) { 1712 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1713 status = -EIO; 1714 goto bail; 1715 } 1716 1717 status = ocfs2_inode_lock(inode, &bh, 0); 1718 if (status < 0) { 1719 mlog_errno(status); 1720 goto bail; 1721 } 1722 1723 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1724 1725 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1726 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1727 1728 buf->f_type = OCFS2_SUPER_MAGIC; 1729 buf->f_bsize = dentry->d_sb->s_blocksize; 1730 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1731 buf->f_blocks = ((sector_t) numbits) * 1732 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1733 buf->f_bfree = ((sector_t) freebits) * 1734 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1735 buf->f_bavail = buf->f_bfree; 1736 buf->f_files = numbits; 1737 buf->f_ffree = freebits; 1738 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1739 & 0xFFFFFFFFUL; 1740 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1741 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1742 1743 brelse(bh); 1744 1745 ocfs2_inode_unlock(inode, 0); 1746 status = 0; 1747 bail: 1748 if (inode) 1749 iput(inode); 1750 1751 if (status) 1752 mlog_errno(status); 1753 1754 return status; 1755 } 1756 1757 static void ocfs2_inode_init_once(void *data) 1758 { 1759 struct ocfs2_inode_info *oi = data; 1760 1761 oi->ip_flags = 0; 1762 oi->ip_open_count = 0; 1763 spin_lock_init(&oi->ip_lock); 1764 ocfs2_extent_map_init(&oi->vfs_inode); 1765 INIT_LIST_HEAD(&oi->ip_io_markers); 1766 oi->ip_dir_start_lookup = 0; 1767 atomic_set(&oi->ip_unaligned_aio, 0); 1768 init_rwsem(&oi->ip_alloc_sem); 1769 init_rwsem(&oi->ip_xattr_sem); 1770 mutex_init(&oi->ip_io_mutex); 1771 1772 oi->ip_blkno = 0ULL; 1773 oi->ip_clusters = 0; 1774 1775 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1776 1777 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1778 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1779 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1780 1781 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1782 &ocfs2_inode_caching_ops); 1783 1784 inode_init_once(&oi->vfs_inode); 1785 } 1786 1787 static int ocfs2_initialize_mem_caches(void) 1788 { 1789 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1790 sizeof(struct ocfs2_inode_info), 1791 0, 1792 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1793 SLAB_MEM_SPREAD), 1794 ocfs2_inode_init_once); 1795 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1796 sizeof(struct ocfs2_dquot), 1797 0, 1798 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1799 SLAB_MEM_SPREAD), 1800 NULL); 1801 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1802 sizeof(struct ocfs2_quota_chunk), 1803 0, 1804 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1805 NULL); 1806 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1807 !ocfs2_qf_chunk_cachep) { 1808 if (ocfs2_inode_cachep) 1809 kmem_cache_destroy(ocfs2_inode_cachep); 1810 if (ocfs2_dquot_cachep) 1811 kmem_cache_destroy(ocfs2_dquot_cachep); 1812 if (ocfs2_qf_chunk_cachep) 1813 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1814 return -ENOMEM; 1815 } 1816 1817 return 0; 1818 } 1819 1820 static void ocfs2_free_mem_caches(void) 1821 { 1822 /* 1823 * Make sure all delayed rcu free inodes are flushed before we 1824 * destroy cache. 1825 */ 1826 rcu_barrier(); 1827 if (ocfs2_inode_cachep) 1828 kmem_cache_destroy(ocfs2_inode_cachep); 1829 ocfs2_inode_cachep = NULL; 1830 1831 if (ocfs2_dquot_cachep) 1832 kmem_cache_destroy(ocfs2_dquot_cachep); 1833 ocfs2_dquot_cachep = NULL; 1834 1835 if (ocfs2_qf_chunk_cachep) 1836 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1837 ocfs2_qf_chunk_cachep = NULL; 1838 } 1839 1840 static int ocfs2_get_sector(struct super_block *sb, 1841 struct buffer_head **bh, 1842 int block, 1843 int sect_size) 1844 { 1845 if (!sb_set_blocksize(sb, sect_size)) { 1846 mlog(ML_ERROR, "unable to set blocksize\n"); 1847 return -EIO; 1848 } 1849 1850 *bh = sb_getblk(sb, block); 1851 if (!*bh) { 1852 mlog_errno(-EIO); 1853 return -EIO; 1854 } 1855 lock_buffer(*bh); 1856 if (!buffer_dirty(*bh)) 1857 clear_buffer_uptodate(*bh); 1858 unlock_buffer(*bh); 1859 ll_rw_block(READ, 1, bh); 1860 wait_on_buffer(*bh); 1861 if (!buffer_uptodate(*bh)) { 1862 mlog_errno(-EIO); 1863 brelse(*bh); 1864 *bh = NULL; 1865 return -EIO; 1866 } 1867 1868 return 0; 1869 } 1870 1871 static int ocfs2_mount_volume(struct super_block *sb) 1872 { 1873 int status = 0; 1874 int unlock_super = 0; 1875 struct ocfs2_super *osb = OCFS2_SB(sb); 1876 1877 if (ocfs2_is_hard_readonly(osb)) 1878 goto leave; 1879 1880 status = ocfs2_dlm_init(osb); 1881 if (status < 0) { 1882 mlog_errno(status); 1883 goto leave; 1884 } 1885 1886 status = ocfs2_super_lock(osb, 1); 1887 if (status < 0) { 1888 mlog_errno(status); 1889 goto leave; 1890 } 1891 unlock_super = 1; 1892 1893 /* This will load up the node map and add ourselves to it. */ 1894 status = ocfs2_find_slot(osb); 1895 if (status < 0) { 1896 mlog_errno(status); 1897 goto leave; 1898 } 1899 1900 /* load all node-local system inodes */ 1901 status = ocfs2_init_local_system_inodes(osb); 1902 if (status < 0) { 1903 mlog_errno(status); 1904 goto leave; 1905 } 1906 1907 status = ocfs2_check_volume(osb); 1908 if (status < 0) { 1909 mlog_errno(status); 1910 goto leave; 1911 } 1912 1913 status = ocfs2_truncate_log_init(osb); 1914 if (status < 0) 1915 mlog_errno(status); 1916 1917 leave: 1918 if (unlock_super) 1919 ocfs2_super_unlock(osb, 1); 1920 1921 return status; 1922 } 1923 1924 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1925 { 1926 int tmp, hangup_needed = 0; 1927 struct ocfs2_super *osb = NULL; 1928 char nodestr[8]; 1929 1930 trace_ocfs2_dismount_volume(sb); 1931 1932 BUG_ON(!sb); 1933 osb = OCFS2_SB(sb); 1934 BUG_ON(!osb); 1935 1936 debugfs_remove(osb->osb_ctxt); 1937 1938 /* 1939 * Flush inode dropping work queue so that deletes are 1940 * performed while the filesystem is still working 1941 */ 1942 ocfs2_drop_all_dl_inodes(osb); 1943 1944 /* Orphan scan should be stopped as early as possible */ 1945 ocfs2_orphan_scan_stop(osb); 1946 1947 ocfs2_disable_quotas(osb); 1948 1949 ocfs2_shutdown_local_alloc(osb); 1950 1951 ocfs2_truncate_log_shutdown(osb); 1952 1953 /* This will disable recovery and flush any recovery work. */ 1954 ocfs2_recovery_exit(osb); 1955 1956 ocfs2_journal_shutdown(osb); 1957 1958 ocfs2_sync_blockdev(sb); 1959 1960 ocfs2_purge_refcount_trees(osb); 1961 1962 /* No cluster connection means we've failed during mount, so skip 1963 * all the steps which depended on that to complete. */ 1964 if (osb->cconn) { 1965 tmp = ocfs2_super_lock(osb, 1); 1966 if (tmp < 0) { 1967 mlog_errno(tmp); 1968 return; 1969 } 1970 } 1971 1972 if (osb->slot_num != OCFS2_INVALID_SLOT) 1973 ocfs2_put_slot(osb); 1974 1975 if (osb->cconn) 1976 ocfs2_super_unlock(osb, 1); 1977 1978 ocfs2_release_system_inodes(osb); 1979 1980 /* 1981 * If we're dismounting due to mount error, mount.ocfs2 will clean 1982 * up heartbeat. If we're a local mount, there is no heartbeat. 1983 * If we failed before we got a uuid_str yet, we can't stop 1984 * heartbeat. Otherwise, do it. 1985 */ 1986 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1987 !ocfs2_is_hard_readonly(osb)) 1988 hangup_needed = 1; 1989 1990 if (osb->cconn) 1991 ocfs2_dlm_shutdown(osb, hangup_needed); 1992 1993 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1994 debugfs_remove(osb->osb_debug_root); 1995 1996 if (hangup_needed) 1997 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1998 1999 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 2000 2001 if (ocfs2_mount_local(osb)) 2002 snprintf(nodestr, sizeof(nodestr), "local"); 2003 else 2004 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 2005 2006 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 2007 osb->dev_str, nodestr); 2008 2009 ocfs2_delete_osb(osb); 2010 kfree(osb); 2011 sb->s_dev = 0; 2012 sb->s_fs_info = NULL; 2013 } 2014 2015 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2016 unsigned uuid_bytes) 2017 { 2018 int i, ret; 2019 char *ptr; 2020 2021 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2022 2023 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2024 if (osb->uuid_str == NULL) 2025 return -ENOMEM; 2026 2027 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2028 /* print with null */ 2029 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2030 if (ret != 2) /* drop super cleans up */ 2031 return -EINVAL; 2032 /* then only advance past the last char */ 2033 ptr += 2; 2034 } 2035 2036 return 0; 2037 } 2038 2039 /* Make sure entire volume is addressable by our journal. Requires 2040 osb_clusters_at_boot to be valid and for the journal to have been 2041 initialized by ocfs2_journal_init(). */ 2042 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2043 { 2044 int status = 0; 2045 u64 max_block = 2046 ocfs2_clusters_to_blocks(osb->sb, 2047 osb->osb_clusters_at_boot) - 1; 2048 2049 /* 32-bit block number is always OK. */ 2050 if (max_block <= (u32)~0ULL) 2051 goto out; 2052 2053 /* Volume is "huge", so see if our journal is new enough to 2054 support it. */ 2055 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2056 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2057 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2058 JBD2_FEATURE_INCOMPAT_64BIT))) { 2059 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2060 "Enable the 'block64' journal option with tunefs.ocfs2"); 2061 status = -EFBIG; 2062 goto out; 2063 } 2064 2065 out: 2066 return status; 2067 } 2068 2069 static int ocfs2_initialize_super(struct super_block *sb, 2070 struct buffer_head *bh, 2071 int sector_size, 2072 struct ocfs2_blockcheck_stats *stats) 2073 { 2074 int status; 2075 int i, cbits, bbits; 2076 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2077 struct inode *inode = NULL; 2078 struct ocfs2_journal *journal; 2079 __le32 uuid_net_key; 2080 struct ocfs2_super *osb; 2081 u64 total_blocks; 2082 2083 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2084 if (!osb) { 2085 status = -ENOMEM; 2086 mlog_errno(status); 2087 goto bail; 2088 } 2089 2090 sb->s_fs_info = osb; 2091 sb->s_op = &ocfs2_sops; 2092 sb->s_d_op = &ocfs2_dentry_ops; 2093 sb->s_export_op = &ocfs2_export_ops; 2094 sb->s_qcop = &ocfs2_quotactl_ops; 2095 sb->dq_op = &ocfs2_quota_operations; 2096 sb->s_xattr = ocfs2_xattr_handlers; 2097 sb->s_time_gran = 1; 2098 sb->s_flags |= MS_NOATIME; 2099 /* this is needed to support O_LARGEFILE */ 2100 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2101 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2102 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2103 2104 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2105 2106 for (i = 0; i < 3; i++) 2107 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2108 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2109 2110 osb->sb = sb; 2111 /* Save off for ocfs2_rw_direct */ 2112 osb->s_sectsize_bits = blksize_bits(sector_size); 2113 BUG_ON(!osb->s_sectsize_bits); 2114 2115 spin_lock_init(&osb->dc_task_lock); 2116 init_waitqueue_head(&osb->dc_event); 2117 osb->dc_work_sequence = 0; 2118 osb->dc_wake_sequence = 0; 2119 INIT_LIST_HEAD(&osb->blocked_lock_list); 2120 osb->blocked_lock_count = 0; 2121 spin_lock_init(&osb->osb_lock); 2122 spin_lock_init(&osb->osb_xattr_lock); 2123 ocfs2_init_steal_slots(osb); 2124 2125 atomic_set(&osb->alloc_stats.moves, 0); 2126 atomic_set(&osb->alloc_stats.local_data, 0); 2127 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2128 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2129 atomic_set(&osb->alloc_stats.bg_extends, 0); 2130 2131 /* Copy the blockcheck stats from the superblock probe */ 2132 osb->osb_ecc_stats = *stats; 2133 2134 ocfs2_init_node_maps(osb); 2135 2136 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2137 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2138 2139 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2140 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2141 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2142 osb->max_slots); 2143 status = -EINVAL; 2144 goto bail; 2145 } 2146 2147 ocfs2_orphan_scan_init(osb); 2148 2149 status = ocfs2_recovery_init(osb); 2150 if (status) { 2151 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2152 mlog_errno(status); 2153 goto bail; 2154 } 2155 2156 init_waitqueue_head(&osb->checkpoint_event); 2157 atomic_set(&osb->needs_checkpoint, 0); 2158 2159 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2160 2161 osb->slot_num = OCFS2_INVALID_SLOT; 2162 2163 osb->s_xattr_inline_size = le16_to_cpu( 2164 di->id2.i_super.s_xattr_inline_size); 2165 2166 osb->local_alloc_state = OCFS2_LA_UNUSED; 2167 osb->local_alloc_bh = NULL; 2168 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2169 2170 init_waitqueue_head(&osb->osb_mount_event); 2171 2172 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2173 if (status) { 2174 mlog_errno(status); 2175 goto bail; 2176 } 2177 2178 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2179 if (!osb->vol_label) { 2180 mlog(ML_ERROR, "unable to alloc vol label\n"); 2181 status = -ENOMEM; 2182 goto bail; 2183 } 2184 2185 osb->slot_recovery_generations = 2186 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2187 GFP_KERNEL); 2188 if (!osb->slot_recovery_generations) { 2189 status = -ENOMEM; 2190 mlog_errno(status); 2191 goto bail; 2192 } 2193 2194 init_waitqueue_head(&osb->osb_wipe_event); 2195 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2196 sizeof(*osb->osb_orphan_wipes), 2197 GFP_KERNEL); 2198 if (!osb->osb_orphan_wipes) { 2199 status = -ENOMEM; 2200 mlog_errno(status); 2201 goto bail; 2202 } 2203 2204 osb->osb_rf_lock_tree = RB_ROOT; 2205 2206 osb->s_feature_compat = 2207 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2208 osb->s_feature_ro_compat = 2209 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2210 osb->s_feature_incompat = 2211 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2212 2213 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2214 mlog(ML_ERROR, "couldn't mount because of unsupported " 2215 "optional features (%x).\n", i); 2216 status = -EINVAL; 2217 goto bail; 2218 } 2219 if (!(osb->sb->s_flags & MS_RDONLY) && 2220 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2221 mlog(ML_ERROR, "couldn't mount RDWR because of " 2222 "unsupported optional features (%x).\n", i); 2223 status = -EINVAL; 2224 goto bail; 2225 } 2226 2227 if (ocfs2_clusterinfo_valid(osb)) { 2228 osb->osb_stackflags = 2229 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2230 memcpy(osb->osb_cluster_stack, 2231 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2232 OCFS2_STACK_LABEL_LEN); 2233 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2234 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2235 mlog(ML_ERROR, 2236 "couldn't mount because of an invalid " 2237 "cluster stack label (%s) \n", 2238 osb->osb_cluster_stack); 2239 status = -EINVAL; 2240 goto bail; 2241 } 2242 } else { 2243 /* The empty string is identical with classic tools that 2244 * don't know about s_cluster_info. */ 2245 osb->osb_cluster_stack[0] = '\0'; 2246 } 2247 2248 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2249 2250 /* FIXME 2251 * This should be done in ocfs2_journal_init(), but unknown 2252 * ordering issues will cause the filesystem to crash. 2253 * If anyone wants to figure out what part of the code 2254 * refers to osb->journal before ocfs2_journal_init() is run, 2255 * be my guest. 2256 */ 2257 /* initialize our journal structure */ 2258 2259 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2260 if (!journal) { 2261 mlog(ML_ERROR, "unable to alloc journal\n"); 2262 status = -ENOMEM; 2263 goto bail; 2264 } 2265 osb->journal = journal; 2266 journal->j_osb = osb; 2267 2268 atomic_set(&journal->j_num_trans, 0); 2269 init_rwsem(&journal->j_trans_barrier); 2270 init_waitqueue_head(&journal->j_checkpointed); 2271 spin_lock_init(&journal->j_lock); 2272 journal->j_trans_id = (unsigned long) 1; 2273 INIT_LIST_HEAD(&journal->j_la_cleanups); 2274 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2275 journal->j_state = OCFS2_JOURNAL_FREE; 2276 2277 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2278 osb->dentry_lock_list = NULL; 2279 2280 /* get some pseudo constants for clustersize bits */ 2281 osb->s_clustersize_bits = 2282 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2283 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2284 2285 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2286 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2287 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2288 osb->s_clustersize); 2289 status = -EINVAL; 2290 goto bail; 2291 } 2292 2293 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2294 le32_to_cpu(di->i_clusters)); 2295 2296 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2297 total_blocks); 2298 if (status) { 2299 mlog(ML_ERROR, "Volume too large " 2300 "to mount safely on this system"); 2301 status = -EFBIG; 2302 goto bail; 2303 } 2304 2305 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2306 sizeof(di->id2.i_super.s_uuid))) { 2307 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2308 status = -ENOMEM; 2309 goto bail; 2310 } 2311 2312 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2313 2314 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2315 osb->vol_label[63] = '\0'; 2316 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2317 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2318 osb->first_cluster_group_blkno = 2319 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2320 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2321 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2322 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2323 (unsigned long long)osb->root_blkno, 2324 (unsigned long long)osb->system_dir_blkno, 2325 osb->s_clustersize_bits); 2326 2327 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2328 if (!osb->osb_dlm_debug) { 2329 status = -ENOMEM; 2330 mlog_errno(status); 2331 goto bail; 2332 } 2333 2334 atomic_set(&osb->vol_state, VOLUME_INIT); 2335 2336 /* load root, system_dir, and all global system inodes */ 2337 status = ocfs2_init_global_system_inodes(osb); 2338 if (status < 0) { 2339 mlog_errno(status); 2340 goto bail; 2341 } 2342 2343 /* 2344 * global bitmap 2345 */ 2346 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2347 OCFS2_INVALID_SLOT); 2348 if (!inode) { 2349 status = -EINVAL; 2350 mlog_errno(status); 2351 goto bail; 2352 } 2353 2354 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2355 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2356 iput(inode); 2357 2358 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2359 osb->s_feature_incompat) * 8; 2360 2361 status = ocfs2_init_slot_info(osb); 2362 if (status < 0) { 2363 mlog_errno(status); 2364 goto bail; 2365 } 2366 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb); 2367 2368 bail: 2369 return status; 2370 } 2371 2372 /* 2373 * will return: -EAGAIN if it is ok to keep searching for superblocks 2374 * -EINVAL if there is a bad superblock 2375 * 0 on success 2376 */ 2377 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2378 struct buffer_head *bh, 2379 u32 blksz, 2380 struct ocfs2_blockcheck_stats *stats) 2381 { 2382 int status = -EAGAIN; 2383 2384 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2385 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2386 /* We have to do a raw check of the feature here */ 2387 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2388 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2389 status = ocfs2_block_check_validate(bh->b_data, 2390 bh->b_size, 2391 &di->i_check, 2392 stats); 2393 if (status) 2394 goto out; 2395 } 2396 status = -EINVAL; 2397 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2398 mlog(ML_ERROR, "found superblock with incorrect block " 2399 "size: found %u, should be %u\n", 2400 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2401 blksz); 2402 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2403 OCFS2_MAJOR_REV_LEVEL || 2404 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2405 OCFS2_MINOR_REV_LEVEL) { 2406 mlog(ML_ERROR, "found superblock with bad version: " 2407 "found %u.%u, should be %u.%u\n", 2408 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2409 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2410 OCFS2_MAJOR_REV_LEVEL, 2411 OCFS2_MINOR_REV_LEVEL); 2412 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2413 mlog(ML_ERROR, "bad block number on superblock: " 2414 "found %llu, should be %llu\n", 2415 (unsigned long long)le64_to_cpu(di->i_blkno), 2416 (unsigned long long)bh->b_blocknr); 2417 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2418 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2419 mlog(ML_ERROR, "bad cluster size found: %u\n", 2420 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2421 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2422 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2423 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2424 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2425 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2426 mlog(ML_ERROR, 2427 "Superblock slots found greater than file system " 2428 "maximum: found %u, max %u\n", 2429 le16_to_cpu(di->id2.i_super.s_max_slots), 2430 OCFS2_MAX_SLOTS); 2431 } else { 2432 /* found it! */ 2433 status = 0; 2434 } 2435 } 2436 2437 out: 2438 if (status && status != -EAGAIN) 2439 mlog_errno(status); 2440 return status; 2441 } 2442 2443 static int ocfs2_check_volume(struct ocfs2_super *osb) 2444 { 2445 int status; 2446 int dirty; 2447 int local; 2448 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2449 * recover 2450 * ourselves. */ 2451 2452 /* Init our journal object. */ 2453 status = ocfs2_journal_init(osb->journal, &dirty); 2454 if (status < 0) { 2455 mlog(ML_ERROR, "Could not initialize journal!\n"); 2456 goto finally; 2457 } 2458 2459 /* Now that journal has been initialized, check to make sure 2460 entire volume is addressable. */ 2461 status = ocfs2_journal_addressable(osb); 2462 if (status) 2463 goto finally; 2464 2465 /* If the journal was unmounted cleanly then we don't want to 2466 * recover anything. Otherwise, journal_load will do that 2467 * dirty work for us :) */ 2468 if (!dirty) { 2469 status = ocfs2_journal_wipe(osb->journal, 0); 2470 if (status < 0) { 2471 mlog_errno(status); 2472 goto finally; 2473 } 2474 } else { 2475 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2476 "unmounted cleanly, recovering it.\n", osb->dev_str); 2477 } 2478 2479 local = ocfs2_mount_local(osb); 2480 2481 /* will play back anything left in the journal. */ 2482 status = ocfs2_journal_load(osb->journal, local, dirty); 2483 if (status < 0) { 2484 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2485 goto finally; 2486 } 2487 2488 if (dirty) { 2489 /* recover my local alloc if we didn't unmount cleanly. */ 2490 status = ocfs2_begin_local_alloc_recovery(osb, 2491 osb->slot_num, 2492 &local_alloc); 2493 if (status < 0) { 2494 mlog_errno(status); 2495 goto finally; 2496 } 2497 /* we complete the recovery process after we've marked 2498 * ourselves as mounted. */ 2499 } 2500 2501 status = ocfs2_load_local_alloc(osb); 2502 if (status < 0) { 2503 mlog_errno(status); 2504 goto finally; 2505 } 2506 2507 if (dirty) { 2508 /* Recovery will be completed after we've mounted the 2509 * rest of the volume. */ 2510 osb->dirty = 1; 2511 osb->local_alloc_copy = local_alloc; 2512 local_alloc = NULL; 2513 } 2514 2515 /* go through each journal, trylock it and if you get the 2516 * lock, and it's marked as dirty, set the bit in the recover 2517 * map and launch a recovery thread for it. */ 2518 status = ocfs2_mark_dead_nodes(osb); 2519 if (status < 0) { 2520 mlog_errno(status); 2521 goto finally; 2522 } 2523 2524 status = ocfs2_compute_replay_slots(osb); 2525 if (status < 0) 2526 mlog_errno(status); 2527 2528 finally: 2529 kfree(local_alloc); 2530 2531 if (status) 2532 mlog_errno(status); 2533 return status; 2534 } 2535 2536 /* 2537 * The routine gets called from dismount or close whenever a dismount on 2538 * volume is requested and the osb open count becomes 1. 2539 * It will remove the osb from the global list and also free up all the 2540 * initialized resources and fileobject. 2541 */ 2542 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2543 { 2544 /* This function assumes that the caller has the main osb resource */ 2545 2546 ocfs2_free_slot_info(osb); 2547 2548 kfree(osb->osb_orphan_wipes); 2549 kfree(osb->slot_recovery_generations); 2550 /* FIXME 2551 * This belongs in journal shutdown, but because we have to 2552 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2553 * we free it here. 2554 */ 2555 kfree(osb->journal); 2556 kfree(osb->local_alloc_copy); 2557 kfree(osb->uuid_str); 2558 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2559 memset(osb, 0, sizeof(struct ocfs2_super)); 2560 } 2561 2562 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2563 * panic(). We do not support continue-on-error operation. */ 2564 static void ocfs2_handle_error(struct super_block *sb) 2565 { 2566 struct ocfs2_super *osb = OCFS2_SB(sb); 2567 2568 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2569 panic("OCFS2: (device %s): panic forced after error\n", 2570 sb->s_id); 2571 2572 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2573 2574 if (sb->s_flags & MS_RDONLY && 2575 (ocfs2_is_soft_readonly(osb) || 2576 ocfs2_is_hard_readonly(osb))) 2577 return; 2578 2579 printk(KERN_CRIT "File system is now read-only due to the potential " 2580 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2581 "system is unmounted.\n"); 2582 sb->s_flags |= MS_RDONLY; 2583 ocfs2_set_ro_flag(osb, 0); 2584 } 2585 2586 static char error_buf[1024]; 2587 2588 void __ocfs2_error(struct super_block *sb, 2589 const char *function, 2590 const char *fmt, ...) 2591 { 2592 va_list args; 2593 2594 va_start(args, fmt); 2595 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2596 va_end(args); 2597 2598 /* Not using mlog here because we want to show the actual 2599 * function the error came from. */ 2600 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2601 sb->s_id, function, error_buf); 2602 2603 ocfs2_handle_error(sb); 2604 } 2605 2606 /* Handle critical errors. This is intentionally more drastic than 2607 * ocfs2_handle_error, so we only use for things like journal errors, 2608 * etc. */ 2609 void __ocfs2_abort(struct super_block* sb, 2610 const char *function, 2611 const char *fmt, ...) 2612 { 2613 va_list args; 2614 2615 va_start(args, fmt); 2616 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2617 va_end(args); 2618 2619 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2620 sb->s_id, function, error_buf); 2621 2622 /* We don't have the cluster support yet to go straight to 2623 * hard readonly in here. Until then, we want to keep 2624 * ocfs2_abort() so that we can at least mark critical 2625 * errors. 2626 * 2627 * TODO: This should abort the journal and alert other nodes 2628 * that our slot needs recovery. */ 2629 2630 /* Force a panic(). This stinks, but it's better than letting 2631 * things continue without having a proper hard readonly 2632 * here. */ 2633 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2634 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2635 ocfs2_handle_error(sb); 2636 } 2637 2638 /* 2639 * Void signal blockers, because in-kernel sigprocmask() only fails 2640 * when SIG_* is wrong. 2641 */ 2642 void ocfs2_block_signals(sigset_t *oldset) 2643 { 2644 int rc; 2645 sigset_t blocked; 2646 2647 sigfillset(&blocked); 2648 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2649 BUG_ON(rc); 2650 } 2651 2652 void ocfs2_unblock_signals(sigset_t *oldset) 2653 { 2654 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2655 BUG_ON(rc); 2656 } 2657 2658 module_init(ocfs2_init); 2659 module_exit(ocfs2_exit); 2660