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 1270 static int ocfs2_check_set_options(struct super_block *sb, 1271 struct mount_options *options) 1272 { 1273 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1274 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1275 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1276 mlog(ML_ERROR, "User quotas were requested, but this " 1277 "filesystem does not have the feature enabled.\n"); 1278 return 0; 1279 } 1280 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1281 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1282 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1283 mlog(ML_ERROR, "Group quotas were requested, but this " 1284 "filesystem does not have the feature enabled.\n"); 1285 return 0; 1286 } 1287 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1288 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1289 mlog(ML_ERROR, "ACL support requested but extended attributes " 1290 "feature is not enabled\n"); 1291 return 0; 1292 } 1293 /* No ACL setting specified? Use XATTR feature... */ 1294 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1295 OCFS2_MOUNT_NO_POSIX_ACL))) { 1296 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1297 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1298 else 1299 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1300 } 1301 return 1; 1302 } 1303 1304 static int ocfs2_parse_options(struct super_block *sb, 1305 char *options, 1306 struct mount_options *mopt, 1307 int is_remount) 1308 { 1309 int status, user_stack = 0; 1310 char *p; 1311 u32 tmp; 1312 1313 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1314 1315 mopt->commit_interval = 0; 1316 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1317 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1318 mopt->slot = OCFS2_INVALID_SLOT; 1319 mopt->localalloc_opt = -1; 1320 mopt->cluster_stack[0] = '\0'; 1321 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1322 mopt->dir_resv_level = -1; 1323 1324 if (!options) { 1325 status = 1; 1326 goto bail; 1327 } 1328 1329 while ((p = strsep(&options, ",")) != NULL) { 1330 int token, option; 1331 substring_t args[MAX_OPT_ARGS]; 1332 1333 if (!*p) 1334 continue; 1335 1336 token = match_token(p, tokens, args); 1337 switch (token) { 1338 case Opt_hb_local: 1339 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1340 break; 1341 case Opt_hb_none: 1342 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1343 break; 1344 case Opt_hb_global: 1345 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1346 break; 1347 case Opt_barrier: 1348 if (match_int(&args[0], &option)) { 1349 status = 0; 1350 goto bail; 1351 } 1352 if (option) 1353 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1354 else 1355 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1356 break; 1357 case Opt_intr: 1358 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1359 break; 1360 case Opt_nointr: 1361 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1362 break; 1363 case Opt_err_panic: 1364 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1365 break; 1366 case Opt_err_ro: 1367 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1368 break; 1369 case Opt_data_ordered: 1370 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1371 break; 1372 case Opt_data_writeback: 1373 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1374 break; 1375 case Opt_user_xattr: 1376 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1377 break; 1378 case Opt_nouser_xattr: 1379 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1380 break; 1381 case Opt_atime_quantum: 1382 if (match_int(&args[0], &option)) { 1383 status = 0; 1384 goto bail; 1385 } 1386 if (option >= 0) 1387 mopt->atime_quantum = option; 1388 break; 1389 case Opt_slot: 1390 option = 0; 1391 if (match_int(&args[0], &option)) { 1392 status = 0; 1393 goto bail; 1394 } 1395 if (option) 1396 mopt->slot = (s16)option; 1397 break; 1398 case Opt_commit: 1399 option = 0; 1400 if (match_int(&args[0], &option)) { 1401 status = 0; 1402 goto bail; 1403 } 1404 if (option < 0) 1405 return 0; 1406 if (option == 0) 1407 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1408 mopt->commit_interval = HZ * option; 1409 break; 1410 case Opt_localalloc: 1411 option = 0; 1412 if (match_int(&args[0], &option)) { 1413 status = 0; 1414 goto bail; 1415 } 1416 if (option >= 0) 1417 mopt->localalloc_opt = option; 1418 break; 1419 case Opt_localflocks: 1420 /* 1421 * Changing this during remount could race 1422 * flock() requests, or "unbalance" existing 1423 * ones (e.g., a lock is taken in one mode but 1424 * dropped in the other). If users care enough 1425 * to flip locking modes during remount, we 1426 * could add a "local" flag to individual 1427 * flock structures for proper tracking of 1428 * state. 1429 */ 1430 if (!is_remount) 1431 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1432 break; 1433 case Opt_stack: 1434 /* Check both that the option we were passed 1435 * is of the right length and that it is a proper 1436 * string of the right length. 1437 */ 1438 if (((args[0].to - args[0].from) != 1439 OCFS2_STACK_LABEL_LEN) || 1440 (strnlen(args[0].from, 1441 OCFS2_STACK_LABEL_LEN) != 1442 OCFS2_STACK_LABEL_LEN)) { 1443 mlog(ML_ERROR, 1444 "Invalid cluster_stack option\n"); 1445 status = 0; 1446 goto bail; 1447 } 1448 memcpy(mopt->cluster_stack, args[0].from, 1449 OCFS2_STACK_LABEL_LEN); 1450 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1451 /* 1452 * Open code the memcmp here as we don't have 1453 * an osb to pass to 1454 * ocfs2_userspace_stack(). 1455 */ 1456 if (memcmp(mopt->cluster_stack, 1457 OCFS2_CLASSIC_CLUSTER_STACK, 1458 OCFS2_STACK_LABEL_LEN)) 1459 user_stack = 1; 1460 break; 1461 case Opt_inode64: 1462 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1463 break; 1464 case Opt_usrquota: 1465 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1466 break; 1467 case Opt_grpquota: 1468 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1469 break; 1470 case Opt_coherency_buffered: 1471 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1472 break; 1473 case Opt_coherency_full: 1474 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1475 break; 1476 case Opt_acl: 1477 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1478 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1479 break; 1480 case Opt_noacl: 1481 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1482 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1483 break; 1484 case Opt_resv_level: 1485 if (is_remount) 1486 break; 1487 if (match_int(&args[0], &option)) { 1488 status = 0; 1489 goto bail; 1490 } 1491 if (option >= OCFS2_MIN_RESV_LEVEL && 1492 option < OCFS2_MAX_RESV_LEVEL) 1493 mopt->resv_level = option; 1494 break; 1495 case Opt_dir_resv_level: 1496 if (is_remount) 1497 break; 1498 if (match_int(&args[0], &option)) { 1499 status = 0; 1500 goto bail; 1501 } 1502 if (option >= OCFS2_MIN_RESV_LEVEL && 1503 option < OCFS2_MAX_RESV_LEVEL) 1504 mopt->dir_resv_level = option; 1505 break; 1506 default: 1507 mlog(ML_ERROR, 1508 "Unrecognized mount option \"%s\" " 1509 "or missing value\n", p); 1510 status = 0; 1511 goto bail; 1512 } 1513 } 1514 1515 if (user_stack == 0) { 1516 /* Ensure only one heartbeat mode */ 1517 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1518 OCFS2_MOUNT_HB_GLOBAL | 1519 OCFS2_MOUNT_HB_NONE); 1520 if (hweight32(tmp) != 1) { 1521 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1522 status = 0; 1523 goto bail; 1524 } 1525 } 1526 1527 status = 1; 1528 1529 bail: 1530 return status; 1531 } 1532 1533 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1534 { 1535 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1536 unsigned long opts = osb->s_mount_opt; 1537 unsigned int local_alloc_megs; 1538 1539 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1540 seq_printf(s, ",_netdev"); 1541 if (opts & OCFS2_MOUNT_HB_LOCAL) 1542 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1543 else 1544 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1545 } else 1546 seq_printf(s, ",%s", OCFS2_HB_NONE); 1547 1548 if (opts & OCFS2_MOUNT_NOINTR) 1549 seq_printf(s, ",nointr"); 1550 1551 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1552 seq_printf(s, ",data=writeback"); 1553 else 1554 seq_printf(s, ",data=ordered"); 1555 1556 if (opts & OCFS2_MOUNT_BARRIER) 1557 seq_printf(s, ",barrier=1"); 1558 1559 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1560 seq_printf(s, ",errors=panic"); 1561 else 1562 seq_printf(s, ",errors=remount-ro"); 1563 1564 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1565 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1566 1567 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1568 1569 if (osb->osb_commit_interval) 1570 seq_printf(s, ",commit=%u", 1571 (unsigned) (osb->osb_commit_interval / HZ)); 1572 1573 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1574 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1575 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1576 1577 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1578 seq_printf(s, ",localflocks,"); 1579 1580 if (osb->osb_cluster_stack[0]) 1581 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1582 osb->osb_cluster_stack); 1583 if (opts & OCFS2_MOUNT_USRQUOTA) 1584 seq_printf(s, ",usrquota"); 1585 if (opts & OCFS2_MOUNT_GRPQUOTA) 1586 seq_printf(s, ",grpquota"); 1587 1588 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1589 seq_printf(s, ",coherency=buffered"); 1590 else 1591 seq_printf(s, ",coherency=full"); 1592 1593 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1594 seq_printf(s, ",nouser_xattr"); 1595 else 1596 seq_printf(s, ",user_xattr"); 1597 1598 if (opts & OCFS2_MOUNT_INODE64) 1599 seq_printf(s, ",inode64"); 1600 1601 if (opts & OCFS2_MOUNT_POSIX_ACL) 1602 seq_printf(s, ",acl"); 1603 else 1604 seq_printf(s, ",noacl"); 1605 1606 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1607 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1608 1609 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1610 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1611 1612 return 0; 1613 } 1614 1615 wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; 1616 1617 static int __init ocfs2_init(void) 1618 { 1619 int status, i; 1620 1621 ocfs2_print_version(); 1622 1623 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++) 1624 init_waitqueue_head(&ocfs2__ioend_wq[i]); 1625 1626 status = init_ocfs2_uptodate_cache(); 1627 if (status < 0) 1628 goto out1; 1629 1630 status = ocfs2_initialize_mem_caches(); 1631 if (status < 0) 1632 goto out2; 1633 1634 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1635 if (!ocfs2_wq) { 1636 status = -ENOMEM; 1637 goto out3; 1638 } 1639 1640 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1641 if (!ocfs2_debugfs_root) { 1642 status = -EFAULT; 1643 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1644 } 1645 1646 ocfs2_set_locking_protocol(); 1647 1648 status = register_quota_format(&ocfs2_quota_format); 1649 if (status < 0) 1650 goto out4; 1651 status = register_filesystem(&ocfs2_fs_type); 1652 if (!status) 1653 return 0; 1654 1655 unregister_quota_format(&ocfs2_quota_format); 1656 out4: 1657 destroy_workqueue(ocfs2_wq); 1658 debugfs_remove(ocfs2_debugfs_root); 1659 out3: 1660 ocfs2_free_mem_caches(); 1661 out2: 1662 exit_ocfs2_uptodate_cache(); 1663 out1: 1664 mlog_errno(status); 1665 return status; 1666 } 1667 1668 static void __exit ocfs2_exit(void) 1669 { 1670 if (ocfs2_wq) { 1671 flush_workqueue(ocfs2_wq); 1672 destroy_workqueue(ocfs2_wq); 1673 } 1674 1675 unregister_quota_format(&ocfs2_quota_format); 1676 1677 debugfs_remove(ocfs2_debugfs_root); 1678 1679 ocfs2_free_mem_caches(); 1680 1681 unregister_filesystem(&ocfs2_fs_type); 1682 1683 exit_ocfs2_uptodate_cache(); 1684 } 1685 1686 static void ocfs2_put_super(struct super_block *sb) 1687 { 1688 trace_ocfs2_put_super(sb); 1689 1690 ocfs2_sync_blockdev(sb); 1691 ocfs2_dismount_volume(sb, 0); 1692 } 1693 1694 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1695 { 1696 struct ocfs2_super *osb; 1697 u32 numbits, freebits; 1698 int status; 1699 struct ocfs2_dinode *bm_lock; 1700 struct buffer_head *bh = NULL; 1701 struct inode *inode = NULL; 1702 1703 trace_ocfs2_statfs(dentry->d_sb, buf); 1704 1705 osb = OCFS2_SB(dentry->d_sb); 1706 1707 inode = ocfs2_get_system_file_inode(osb, 1708 GLOBAL_BITMAP_SYSTEM_INODE, 1709 OCFS2_INVALID_SLOT); 1710 if (!inode) { 1711 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1712 status = -EIO; 1713 goto bail; 1714 } 1715 1716 status = ocfs2_inode_lock(inode, &bh, 0); 1717 if (status < 0) { 1718 mlog_errno(status); 1719 goto bail; 1720 } 1721 1722 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1723 1724 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1725 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1726 1727 buf->f_type = OCFS2_SUPER_MAGIC; 1728 buf->f_bsize = dentry->d_sb->s_blocksize; 1729 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1730 buf->f_blocks = ((sector_t) numbits) * 1731 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1732 buf->f_bfree = ((sector_t) freebits) * 1733 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1734 buf->f_bavail = buf->f_bfree; 1735 buf->f_files = numbits; 1736 buf->f_ffree = freebits; 1737 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1738 & 0xFFFFFFFFUL; 1739 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1740 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1741 1742 brelse(bh); 1743 1744 ocfs2_inode_unlock(inode, 0); 1745 status = 0; 1746 bail: 1747 if (inode) 1748 iput(inode); 1749 1750 if (status) 1751 mlog_errno(status); 1752 1753 return status; 1754 } 1755 1756 static void ocfs2_inode_init_once(void *data) 1757 { 1758 struct ocfs2_inode_info *oi = data; 1759 1760 oi->ip_flags = 0; 1761 oi->ip_open_count = 0; 1762 spin_lock_init(&oi->ip_lock); 1763 ocfs2_extent_map_init(&oi->vfs_inode); 1764 INIT_LIST_HEAD(&oi->ip_io_markers); 1765 oi->ip_dir_start_lookup = 0; 1766 atomic_set(&oi->ip_unaligned_aio, 0); 1767 init_rwsem(&oi->ip_alloc_sem); 1768 init_rwsem(&oi->ip_xattr_sem); 1769 mutex_init(&oi->ip_io_mutex); 1770 1771 oi->ip_blkno = 0ULL; 1772 oi->ip_clusters = 0; 1773 1774 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1775 1776 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1777 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1778 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1779 1780 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1781 &ocfs2_inode_caching_ops); 1782 1783 inode_init_once(&oi->vfs_inode); 1784 } 1785 1786 static int ocfs2_initialize_mem_caches(void) 1787 { 1788 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1789 sizeof(struct ocfs2_inode_info), 1790 0, 1791 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1792 SLAB_MEM_SPREAD), 1793 ocfs2_inode_init_once); 1794 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1795 sizeof(struct ocfs2_dquot), 1796 0, 1797 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1798 SLAB_MEM_SPREAD), 1799 NULL); 1800 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1801 sizeof(struct ocfs2_quota_chunk), 1802 0, 1803 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1804 NULL); 1805 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1806 !ocfs2_qf_chunk_cachep) { 1807 if (ocfs2_inode_cachep) 1808 kmem_cache_destroy(ocfs2_inode_cachep); 1809 if (ocfs2_dquot_cachep) 1810 kmem_cache_destroy(ocfs2_dquot_cachep); 1811 if (ocfs2_qf_chunk_cachep) 1812 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1813 return -ENOMEM; 1814 } 1815 1816 return 0; 1817 } 1818 1819 static void ocfs2_free_mem_caches(void) 1820 { 1821 if (ocfs2_inode_cachep) 1822 kmem_cache_destroy(ocfs2_inode_cachep); 1823 ocfs2_inode_cachep = NULL; 1824 1825 if (ocfs2_dquot_cachep) 1826 kmem_cache_destroy(ocfs2_dquot_cachep); 1827 ocfs2_dquot_cachep = NULL; 1828 1829 if (ocfs2_qf_chunk_cachep) 1830 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1831 ocfs2_qf_chunk_cachep = NULL; 1832 } 1833 1834 static int ocfs2_get_sector(struct super_block *sb, 1835 struct buffer_head **bh, 1836 int block, 1837 int sect_size) 1838 { 1839 if (!sb_set_blocksize(sb, sect_size)) { 1840 mlog(ML_ERROR, "unable to set blocksize\n"); 1841 return -EIO; 1842 } 1843 1844 *bh = sb_getblk(sb, block); 1845 if (!*bh) { 1846 mlog_errno(-EIO); 1847 return -EIO; 1848 } 1849 lock_buffer(*bh); 1850 if (!buffer_dirty(*bh)) 1851 clear_buffer_uptodate(*bh); 1852 unlock_buffer(*bh); 1853 ll_rw_block(READ, 1, bh); 1854 wait_on_buffer(*bh); 1855 if (!buffer_uptodate(*bh)) { 1856 mlog_errno(-EIO); 1857 brelse(*bh); 1858 *bh = NULL; 1859 return -EIO; 1860 } 1861 1862 return 0; 1863 } 1864 1865 static int ocfs2_mount_volume(struct super_block *sb) 1866 { 1867 int status = 0; 1868 int unlock_super = 0; 1869 struct ocfs2_super *osb = OCFS2_SB(sb); 1870 1871 if (ocfs2_is_hard_readonly(osb)) 1872 goto leave; 1873 1874 status = ocfs2_dlm_init(osb); 1875 if (status < 0) { 1876 mlog_errno(status); 1877 goto leave; 1878 } 1879 1880 status = ocfs2_super_lock(osb, 1); 1881 if (status < 0) { 1882 mlog_errno(status); 1883 goto leave; 1884 } 1885 unlock_super = 1; 1886 1887 /* This will load up the node map and add ourselves to it. */ 1888 status = ocfs2_find_slot(osb); 1889 if (status < 0) { 1890 mlog_errno(status); 1891 goto leave; 1892 } 1893 1894 /* load all node-local system inodes */ 1895 status = ocfs2_init_local_system_inodes(osb); 1896 if (status < 0) { 1897 mlog_errno(status); 1898 goto leave; 1899 } 1900 1901 status = ocfs2_check_volume(osb); 1902 if (status < 0) { 1903 mlog_errno(status); 1904 goto leave; 1905 } 1906 1907 status = ocfs2_truncate_log_init(osb); 1908 if (status < 0) 1909 mlog_errno(status); 1910 1911 leave: 1912 if (unlock_super) 1913 ocfs2_super_unlock(osb, 1); 1914 1915 return status; 1916 } 1917 1918 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1919 { 1920 int tmp, hangup_needed = 0; 1921 struct ocfs2_super *osb = NULL; 1922 char nodestr[8]; 1923 1924 trace_ocfs2_dismount_volume(sb); 1925 1926 BUG_ON(!sb); 1927 osb = OCFS2_SB(sb); 1928 BUG_ON(!osb); 1929 1930 debugfs_remove(osb->osb_ctxt); 1931 1932 /* 1933 * Flush inode dropping work queue so that deletes are 1934 * performed while the filesystem is still working 1935 */ 1936 ocfs2_drop_all_dl_inodes(osb); 1937 1938 /* Orphan scan should be stopped as early as possible */ 1939 ocfs2_orphan_scan_stop(osb); 1940 1941 ocfs2_disable_quotas(osb); 1942 1943 ocfs2_shutdown_local_alloc(osb); 1944 1945 ocfs2_truncate_log_shutdown(osb); 1946 1947 /* This will disable recovery and flush any recovery work. */ 1948 ocfs2_recovery_exit(osb); 1949 1950 ocfs2_journal_shutdown(osb); 1951 1952 ocfs2_sync_blockdev(sb); 1953 1954 ocfs2_purge_refcount_trees(osb); 1955 1956 /* No cluster connection means we've failed during mount, so skip 1957 * all the steps which depended on that to complete. */ 1958 if (osb->cconn) { 1959 tmp = ocfs2_super_lock(osb, 1); 1960 if (tmp < 0) { 1961 mlog_errno(tmp); 1962 return; 1963 } 1964 } 1965 1966 if (osb->slot_num != OCFS2_INVALID_SLOT) 1967 ocfs2_put_slot(osb); 1968 1969 if (osb->cconn) 1970 ocfs2_super_unlock(osb, 1); 1971 1972 ocfs2_release_system_inodes(osb); 1973 1974 /* 1975 * If we're dismounting due to mount error, mount.ocfs2 will clean 1976 * up heartbeat. If we're a local mount, there is no heartbeat. 1977 * If we failed before we got a uuid_str yet, we can't stop 1978 * heartbeat. Otherwise, do it. 1979 */ 1980 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1981 !ocfs2_is_hard_readonly(osb)) 1982 hangup_needed = 1; 1983 1984 if (osb->cconn) 1985 ocfs2_dlm_shutdown(osb, hangup_needed); 1986 1987 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1988 debugfs_remove(osb->osb_debug_root); 1989 1990 if (hangup_needed) 1991 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1992 1993 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1994 1995 if (ocfs2_mount_local(osb)) 1996 snprintf(nodestr, sizeof(nodestr), "local"); 1997 else 1998 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1999 2000 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 2001 osb->dev_str, nodestr); 2002 2003 ocfs2_delete_osb(osb); 2004 kfree(osb); 2005 sb->s_dev = 0; 2006 sb->s_fs_info = NULL; 2007 } 2008 2009 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2010 unsigned uuid_bytes) 2011 { 2012 int i, ret; 2013 char *ptr; 2014 2015 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2016 2017 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2018 if (osb->uuid_str == NULL) 2019 return -ENOMEM; 2020 2021 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2022 /* print with null */ 2023 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2024 if (ret != 2) /* drop super cleans up */ 2025 return -EINVAL; 2026 /* then only advance past the last char */ 2027 ptr += 2; 2028 } 2029 2030 return 0; 2031 } 2032 2033 /* Make sure entire volume is addressable by our journal. Requires 2034 osb_clusters_at_boot to be valid and for the journal to have been 2035 initialized by ocfs2_journal_init(). */ 2036 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2037 { 2038 int status = 0; 2039 u64 max_block = 2040 ocfs2_clusters_to_blocks(osb->sb, 2041 osb->osb_clusters_at_boot) - 1; 2042 2043 /* 32-bit block number is always OK. */ 2044 if (max_block <= (u32)~0ULL) 2045 goto out; 2046 2047 /* Volume is "huge", so see if our journal is new enough to 2048 support it. */ 2049 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2050 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2051 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2052 JBD2_FEATURE_INCOMPAT_64BIT))) { 2053 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2054 "Enable the 'block64' journal option with tunefs.ocfs2"); 2055 status = -EFBIG; 2056 goto out; 2057 } 2058 2059 out: 2060 return status; 2061 } 2062 2063 static int ocfs2_initialize_super(struct super_block *sb, 2064 struct buffer_head *bh, 2065 int sector_size, 2066 struct ocfs2_blockcheck_stats *stats) 2067 { 2068 int status; 2069 int i, cbits, bbits; 2070 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2071 struct inode *inode = NULL; 2072 struct ocfs2_journal *journal; 2073 __le32 uuid_net_key; 2074 struct ocfs2_super *osb; 2075 u64 total_blocks; 2076 2077 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2078 if (!osb) { 2079 status = -ENOMEM; 2080 mlog_errno(status); 2081 goto bail; 2082 } 2083 2084 sb->s_fs_info = osb; 2085 sb->s_op = &ocfs2_sops; 2086 sb->s_d_op = &ocfs2_dentry_ops; 2087 sb->s_export_op = &ocfs2_export_ops; 2088 sb->s_qcop = &ocfs2_quotactl_ops; 2089 sb->dq_op = &ocfs2_quota_operations; 2090 sb->s_xattr = ocfs2_xattr_handlers; 2091 sb->s_time_gran = 1; 2092 sb->s_flags |= MS_NOATIME; 2093 /* this is needed to support O_LARGEFILE */ 2094 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2095 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2096 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2097 2098 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2099 2100 for (i = 0; i < 3; i++) 2101 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2102 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2103 2104 osb->sb = sb; 2105 /* Save off for ocfs2_rw_direct */ 2106 osb->s_sectsize_bits = blksize_bits(sector_size); 2107 BUG_ON(!osb->s_sectsize_bits); 2108 2109 spin_lock_init(&osb->dc_task_lock); 2110 init_waitqueue_head(&osb->dc_event); 2111 osb->dc_work_sequence = 0; 2112 osb->dc_wake_sequence = 0; 2113 INIT_LIST_HEAD(&osb->blocked_lock_list); 2114 osb->blocked_lock_count = 0; 2115 spin_lock_init(&osb->osb_lock); 2116 spin_lock_init(&osb->osb_xattr_lock); 2117 ocfs2_init_steal_slots(osb); 2118 2119 atomic_set(&osb->alloc_stats.moves, 0); 2120 atomic_set(&osb->alloc_stats.local_data, 0); 2121 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2122 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2123 atomic_set(&osb->alloc_stats.bg_extends, 0); 2124 2125 /* Copy the blockcheck stats from the superblock probe */ 2126 osb->osb_ecc_stats = *stats; 2127 2128 ocfs2_init_node_maps(osb); 2129 2130 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2131 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2132 2133 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2134 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2135 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2136 osb->max_slots); 2137 status = -EINVAL; 2138 goto bail; 2139 } 2140 2141 ocfs2_orphan_scan_init(osb); 2142 2143 status = ocfs2_recovery_init(osb); 2144 if (status) { 2145 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2146 mlog_errno(status); 2147 goto bail; 2148 } 2149 2150 init_waitqueue_head(&osb->checkpoint_event); 2151 atomic_set(&osb->needs_checkpoint, 0); 2152 2153 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2154 2155 osb->slot_num = OCFS2_INVALID_SLOT; 2156 2157 osb->s_xattr_inline_size = le16_to_cpu( 2158 di->id2.i_super.s_xattr_inline_size); 2159 2160 osb->local_alloc_state = OCFS2_LA_UNUSED; 2161 osb->local_alloc_bh = NULL; 2162 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2163 2164 init_waitqueue_head(&osb->osb_mount_event); 2165 2166 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2167 if (status) { 2168 mlog_errno(status); 2169 goto bail; 2170 } 2171 2172 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2173 if (!osb->vol_label) { 2174 mlog(ML_ERROR, "unable to alloc vol label\n"); 2175 status = -ENOMEM; 2176 goto bail; 2177 } 2178 2179 osb->slot_recovery_generations = 2180 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2181 GFP_KERNEL); 2182 if (!osb->slot_recovery_generations) { 2183 status = -ENOMEM; 2184 mlog_errno(status); 2185 goto bail; 2186 } 2187 2188 init_waitqueue_head(&osb->osb_wipe_event); 2189 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2190 sizeof(*osb->osb_orphan_wipes), 2191 GFP_KERNEL); 2192 if (!osb->osb_orphan_wipes) { 2193 status = -ENOMEM; 2194 mlog_errno(status); 2195 goto bail; 2196 } 2197 2198 osb->osb_rf_lock_tree = RB_ROOT; 2199 2200 osb->s_feature_compat = 2201 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2202 osb->s_feature_ro_compat = 2203 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2204 osb->s_feature_incompat = 2205 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2206 2207 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2208 mlog(ML_ERROR, "couldn't mount because of unsupported " 2209 "optional features (%x).\n", i); 2210 status = -EINVAL; 2211 goto bail; 2212 } 2213 if (!(osb->sb->s_flags & MS_RDONLY) && 2214 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2215 mlog(ML_ERROR, "couldn't mount RDWR because of " 2216 "unsupported optional features (%x).\n", i); 2217 status = -EINVAL; 2218 goto bail; 2219 } 2220 2221 if (ocfs2_clusterinfo_valid(osb)) { 2222 osb->osb_stackflags = 2223 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2224 memcpy(osb->osb_cluster_stack, 2225 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2226 OCFS2_STACK_LABEL_LEN); 2227 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2228 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2229 mlog(ML_ERROR, 2230 "couldn't mount because of an invalid " 2231 "cluster stack label (%s) \n", 2232 osb->osb_cluster_stack); 2233 status = -EINVAL; 2234 goto bail; 2235 } 2236 } else { 2237 /* The empty string is identical with classic tools that 2238 * don't know about s_cluster_info. */ 2239 osb->osb_cluster_stack[0] = '\0'; 2240 } 2241 2242 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2243 2244 /* FIXME 2245 * This should be done in ocfs2_journal_init(), but unknown 2246 * ordering issues will cause the filesystem to crash. 2247 * If anyone wants to figure out what part of the code 2248 * refers to osb->journal before ocfs2_journal_init() is run, 2249 * be my guest. 2250 */ 2251 /* initialize our journal structure */ 2252 2253 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2254 if (!journal) { 2255 mlog(ML_ERROR, "unable to alloc journal\n"); 2256 status = -ENOMEM; 2257 goto bail; 2258 } 2259 osb->journal = journal; 2260 journal->j_osb = osb; 2261 2262 atomic_set(&journal->j_num_trans, 0); 2263 init_rwsem(&journal->j_trans_barrier); 2264 init_waitqueue_head(&journal->j_checkpointed); 2265 spin_lock_init(&journal->j_lock); 2266 journal->j_trans_id = (unsigned long) 1; 2267 INIT_LIST_HEAD(&journal->j_la_cleanups); 2268 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2269 journal->j_state = OCFS2_JOURNAL_FREE; 2270 2271 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2272 osb->dentry_lock_list = NULL; 2273 2274 /* get some pseudo constants for clustersize bits */ 2275 osb->s_clustersize_bits = 2276 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2277 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2278 2279 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2280 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2281 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2282 osb->s_clustersize); 2283 status = -EINVAL; 2284 goto bail; 2285 } 2286 2287 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2288 le32_to_cpu(di->i_clusters)); 2289 2290 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2291 total_blocks); 2292 if (status) { 2293 mlog(ML_ERROR, "Volume too large " 2294 "to mount safely on this system"); 2295 status = -EFBIG; 2296 goto bail; 2297 } 2298 2299 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2300 sizeof(di->id2.i_super.s_uuid))) { 2301 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2302 status = -ENOMEM; 2303 goto bail; 2304 } 2305 2306 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2307 2308 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2309 osb->vol_label[63] = '\0'; 2310 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2311 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2312 osb->first_cluster_group_blkno = 2313 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2314 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2315 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2316 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2317 (unsigned long long)osb->root_blkno, 2318 (unsigned long long)osb->system_dir_blkno, 2319 osb->s_clustersize_bits); 2320 2321 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2322 if (!osb->osb_dlm_debug) { 2323 status = -ENOMEM; 2324 mlog_errno(status); 2325 goto bail; 2326 } 2327 2328 atomic_set(&osb->vol_state, VOLUME_INIT); 2329 2330 /* load root, system_dir, and all global system inodes */ 2331 status = ocfs2_init_global_system_inodes(osb); 2332 if (status < 0) { 2333 mlog_errno(status); 2334 goto bail; 2335 } 2336 2337 /* 2338 * global bitmap 2339 */ 2340 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2341 OCFS2_INVALID_SLOT); 2342 if (!inode) { 2343 status = -EINVAL; 2344 mlog_errno(status); 2345 goto bail; 2346 } 2347 2348 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2349 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2350 iput(inode); 2351 2352 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2353 osb->s_feature_incompat) * 8; 2354 2355 status = ocfs2_init_slot_info(osb); 2356 if (status < 0) { 2357 mlog_errno(status); 2358 goto bail; 2359 } 2360 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb); 2361 2362 bail: 2363 return status; 2364 } 2365 2366 /* 2367 * will return: -EAGAIN if it is ok to keep searching for superblocks 2368 * -EINVAL if there is a bad superblock 2369 * 0 on success 2370 */ 2371 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2372 struct buffer_head *bh, 2373 u32 blksz, 2374 struct ocfs2_blockcheck_stats *stats) 2375 { 2376 int status = -EAGAIN; 2377 2378 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2379 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2380 /* We have to do a raw check of the feature here */ 2381 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2382 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2383 status = ocfs2_block_check_validate(bh->b_data, 2384 bh->b_size, 2385 &di->i_check, 2386 stats); 2387 if (status) 2388 goto out; 2389 } 2390 status = -EINVAL; 2391 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2392 mlog(ML_ERROR, "found superblock with incorrect block " 2393 "size: found %u, should be %u\n", 2394 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2395 blksz); 2396 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2397 OCFS2_MAJOR_REV_LEVEL || 2398 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2399 OCFS2_MINOR_REV_LEVEL) { 2400 mlog(ML_ERROR, "found superblock with bad version: " 2401 "found %u.%u, should be %u.%u\n", 2402 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2403 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2404 OCFS2_MAJOR_REV_LEVEL, 2405 OCFS2_MINOR_REV_LEVEL); 2406 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2407 mlog(ML_ERROR, "bad block number on superblock: " 2408 "found %llu, should be %llu\n", 2409 (unsigned long long)le64_to_cpu(di->i_blkno), 2410 (unsigned long long)bh->b_blocknr); 2411 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2412 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2413 mlog(ML_ERROR, "bad cluster size found: %u\n", 2414 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2415 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2416 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2417 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2418 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2419 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2420 mlog(ML_ERROR, 2421 "Superblock slots found greater than file system " 2422 "maximum: found %u, max %u\n", 2423 le16_to_cpu(di->id2.i_super.s_max_slots), 2424 OCFS2_MAX_SLOTS); 2425 } else { 2426 /* found it! */ 2427 status = 0; 2428 } 2429 } 2430 2431 out: 2432 if (status && status != -EAGAIN) 2433 mlog_errno(status); 2434 return status; 2435 } 2436 2437 static int ocfs2_check_volume(struct ocfs2_super *osb) 2438 { 2439 int status; 2440 int dirty; 2441 int local; 2442 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2443 * recover 2444 * ourselves. */ 2445 2446 /* Init our journal object. */ 2447 status = ocfs2_journal_init(osb->journal, &dirty); 2448 if (status < 0) { 2449 mlog(ML_ERROR, "Could not initialize journal!\n"); 2450 goto finally; 2451 } 2452 2453 /* Now that journal has been initialized, check to make sure 2454 entire volume is addressable. */ 2455 status = ocfs2_journal_addressable(osb); 2456 if (status) 2457 goto finally; 2458 2459 /* If the journal was unmounted cleanly then we don't want to 2460 * recover anything. Otherwise, journal_load will do that 2461 * dirty work for us :) */ 2462 if (!dirty) { 2463 status = ocfs2_journal_wipe(osb->journal, 0); 2464 if (status < 0) { 2465 mlog_errno(status); 2466 goto finally; 2467 } 2468 } else { 2469 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2470 "unmounted cleanly, recovering it.\n", osb->dev_str); 2471 } 2472 2473 local = ocfs2_mount_local(osb); 2474 2475 /* will play back anything left in the journal. */ 2476 status = ocfs2_journal_load(osb->journal, local, dirty); 2477 if (status < 0) { 2478 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2479 goto finally; 2480 } 2481 2482 if (dirty) { 2483 /* recover my local alloc if we didn't unmount cleanly. */ 2484 status = ocfs2_begin_local_alloc_recovery(osb, 2485 osb->slot_num, 2486 &local_alloc); 2487 if (status < 0) { 2488 mlog_errno(status); 2489 goto finally; 2490 } 2491 /* we complete the recovery process after we've marked 2492 * ourselves as mounted. */ 2493 } 2494 2495 status = ocfs2_load_local_alloc(osb); 2496 if (status < 0) { 2497 mlog_errno(status); 2498 goto finally; 2499 } 2500 2501 if (dirty) { 2502 /* Recovery will be completed after we've mounted the 2503 * rest of the volume. */ 2504 osb->dirty = 1; 2505 osb->local_alloc_copy = local_alloc; 2506 local_alloc = NULL; 2507 } 2508 2509 /* go through each journal, trylock it and if you get the 2510 * lock, and it's marked as dirty, set the bit in the recover 2511 * map and launch a recovery thread for it. */ 2512 status = ocfs2_mark_dead_nodes(osb); 2513 if (status < 0) { 2514 mlog_errno(status); 2515 goto finally; 2516 } 2517 2518 status = ocfs2_compute_replay_slots(osb); 2519 if (status < 0) 2520 mlog_errno(status); 2521 2522 finally: 2523 if (local_alloc) 2524 kfree(local_alloc); 2525 2526 if (status) 2527 mlog_errno(status); 2528 return status; 2529 } 2530 2531 /* 2532 * The routine gets called from dismount or close whenever a dismount on 2533 * volume is requested and the osb open count becomes 1. 2534 * It will remove the osb from the global list and also free up all the 2535 * initialized resources and fileobject. 2536 */ 2537 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2538 { 2539 /* This function assumes that the caller has the main osb resource */ 2540 2541 ocfs2_free_slot_info(osb); 2542 2543 kfree(osb->osb_orphan_wipes); 2544 kfree(osb->slot_recovery_generations); 2545 /* FIXME 2546 * This belongs in journal shutdown, but because we have to 2547 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2548 * we free it here. 2549 */ 2550 kfree(osb->journal); 2551 if (osb->local_alloc_copy) 2552 kfree(osb->local_alloc_copy); 2553 kfree(osb->uuid_str); 2554 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2555 memset(osb, 0, sizeof(struct ocfs2_super)); 2556 } 2557 2558 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2559 * panic(). We do not support continue-on-error operation. */ 2560 static void ocfs2_handle_error(struct super_block *sb) 2561 { 2562 struct ocfs2_super *osb = OCFS2_SB(sb); 2563 2564 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2565 panic("OCFS2: (device %s): panic forced after error\n", 2566 sb->s_id); 2567 2568 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2569 2570 if (sb->s_flags & MS_RDONLY && 2571 (ocfs2_is_soft_readonly(osb) || 2572 ocfs2_is_hard_readonly(osb))) 2573 return; 2574 2575 printk(KERN_CRIT "File system is now read-only due to the potential " 2576 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2577 "system is unmounted.\n"); 2578 sb->s_flags |= MS_RDONLY; 2579 ocfs2_set_ro_flag(osb, 0); 2580 } 2581 2582 static char error_buf[1024]; 2583 2584 void __ocfs2_error(struct super_block *sb, 2585 const char *function, 2586 const char *fmt, ...) 2587 { 2588 va_list args; 2589 2590 va_start(args, fmt); 2591 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2592 va_end(args); 2593 2594 /* Not using mlog here because we want to show the actual 2595 * function the error came from. */ 2596 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2597 sb->s_id, function, error_buf); 2598 2599 ocfs2_handle_error(sb); 2600 } 2601 2602 /* Handle critical errors. This is intentionally more drastic than 2603 * ocfs2_handle_error, so we only use for things like journal errors, 2604 * etc. */ 2605 void __ocfs2_abort(struct super_block* sb, 2606 const char *function, 2607 const char *fmt, ...) 2608 { 2609 va_list args; 2610 2611 va_start(args, fmt); 2612 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2613 va_end(args); 2614 2615 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2616 sb->s_id, function, error_buf); 2617 2618 /* We don't have the cluster support yet to go straight to 2619 * hard readonly in here. Until then, we want to keep 2620 * ocfs2_abort() so that we can at least mark critical 2621 * errors. 2622 * 2623 * TODO: This should abort the journal and alert other nodes 2624 * that our slot needs recovery. */ 2625 2626 /* Force a panic(). This stinks, but it's better than letting 2627 * things continue without having a proper hard readonly 2628 * here. */ 2629 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2630 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2631 ocfs2_handle_error(sb); 2632 } 2633 2634 /* 2635 * Void signal blockers, because in-kernel sigprocmask() only fails 2636 * when SIG_* is wrong. 2637 */ 2638 void ocfs2_block_signals(sigset_t *oldset) 2639 { 2640 int rc; 2641 sigset_t blocked; 2642 2643 sigfillset(&blocked); 2644 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2645 BUG_ON(rc); 2646 } 2647 2648 void ocfs2_unblock_signals(sigset_t *oldset) 2649 { 2650 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2651 BUG_ON(rc); 2652 } 2653 2654 module_init(ocfs2_init); 2655 module_exit(ocfs2_exit); 2656