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\n", "Commit", 290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 291 osb->osb_commit_interval); 292 293 out += snprintf(buf + out, len - out, 294 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 295 "Journal", osb->journal->j_state, 296 osb->journal->j_trans_id, 297 atomic_read(&osb->journal->j_num_trans)); 298 299 out += snprintf(buf + out, len - out, 300 "%10s => GlobalAllocs: %d LocalAllocs: %d " 301 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 302 "Stats", 303 atomic_read(&osb->alloc_stats.bitmap_data), 304 atomic_read(&osb->alloc_stats.local_data), 305 atomic_read(&osb->alloc_stats.bg_allocs), 306 atomic_read(&osb->alloc_stats.moves), 307 atomic_read(&osb->alloc_stats.bg_extends)); 308 309 out += snprintf(buf + out, len - out, 310 "%10s => State: %u Descriptor: %llu Size: %u bits " 311 "Default: %u bits\n", 312 "LocalAlloc", osb->local_alloc_state, 313 (unsigned long long)osb->la_last_gd, 314 osb->local_alloc_bits, osb->local_alloc_default_bits); 315 316 spin_lock(&osb->osb_lock); 317 out += snprintf(buf + out, len - out, 318 "%10s => InodeSlot: %d StolenInodes: %d, " 319 "MetaSlot: %d StolenMeta: %d\n", "Steal", 320 osb->s_inode_steal_slot, 321 atomic_read(&osb->s_num_inodes_stolen), 322 osb->s_meta_steal_slot, 323 atomic_read(&osb->s_num_meta_stolen)); 324 spin_unlock(&osb->osb_lock); 325 326 out += snprintf(buf + out, len - out, "OrphanScan => "); 327 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 328 os->os_count, os->os_seqno); 329 out += snprintf(buf + out, len - out, " Last Scan: "); 330 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 331 out += snprintf(buf + out, len - out, "Disabled\n"); 332 else 333 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 334 (get_seconds() - os->os_scantime.tv_sec)); 335 336 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 337 "Slots", "Num", "RecoGen"); 338 for (i = 0; i < osb->max_slots; ++i) { 339 out += snprintf(buf + out, len - out, 340 "%10s %c %3d %10d\n", 341 " ", 342 (i == osb->slot_num ? '*' : ' '), 343 i, osb->slot_recovery_generations[i]); 344 } 345 346 return out; 347 } 348 349 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 350 { 351 struct ocfs2_super *osb = inode->i_private; 352 char *buf = NULL; 353 354 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 355 if (!buf) 356 goto bail; 357 358 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 359 360 file->private_data = buf; 361 362 return 0; 363 bail: 364 return -ENOMEM; 365 } 366 367 static int ocfs2_debug_release(struct inode *inode, struct file *file) 368 { 369 kfree(file->private_data); 370 return 0; 371 } 372 373 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 374 size_t nbytes, loff_t *ppos) 375 { 376 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 377 i_size_read(file->f_mapping->host)); 378 } 379 #else 380 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 381 { 382 return 0; 383 } 384 static int ocfs2_debug_release(struct inode *inode, struct file *file) 385 { 386 return 0; 387 } 388 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 389 size_t nbytes, loff_t *ppos) 390 { 391 return 0; 392 } 393 #endif /* CONFIG_DEBUG_FS */ 394 395 static const struct file_operations ocfs2_osb_debug_fops = { 396 .open = ocfs2_osb_debug_open, 397 .release = ocfs2_debug_release, 398 .read = ocfs2_debug_read, 399 .llseek = generic_file_llseek, 400 }; 401 402 static int ocfs2_sync_fs(struct super_block *sb, int wait) 403 { 404 int status; 405 tid_t target; 406 struct ocfs2_super *osb = OCFS2_SB(sb); 407 408 if (ocfs2_is_hard_readonly(osb)) 409 return -EROFS; 410 411 if (wait) { 412 status = ocfs2_flush_truncate_log(osb); 413 if (status < 0) 414 mlog_errno(status); 415 } else { 416 ocfs2_schedule_truncate_log_flush(osb, 0); 417 } 418 419 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 420 &target)) { 421 if (wait) 422 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 423 target); 424 } 425 return 0; 426 } 427 428 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 429 { 430 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 431 && (ino == USER_QUOTA_SYSTEM_INODE 432 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 433 return 0; 434 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 435 && (ino == GROUP_QUOTA_SYSTEM_INODE 436 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 437 return 0; 438 return 1; 439 } 440 441 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 442 { 443 struct inode *new = NULL; 444 int status = 0; 445 int i; 446 447 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 448 if (IS_ERR(new)) { 449 status = PTR_ERR(new); 450 mlog_errno(status); 451 goto bail; 452 } 453 osb->root_inode = new; 454 455 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 456 if (IS_ERR(new)) { 457 status = PTR_ERR(new); 458 mlog_errno(status); 459 goto bail; 460 } 461 osb->sys_root_inode = new; 462 463 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 464 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 465 if (!ocfs2_need_system_inode(osb, i)) 466 continue; 467 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 468 if (!new) { 469 ocfs2_release_system_inodes(osb); 470 status = -EINVAL; 471 mlog_errno(status); 472 /* FIXME: Should ERROR_RO_FS */ 473 mlog(ML_ERROR, "Unable to load system inode %d, " 474 "possibly corrupt fs?", i); 475 goto bail; 476 } 477 // the array now has one ref, so drop this one 478 iput(new); 479 } 480 481 bail: 482 if (status) 483 mlog_errno(status); 484 return status; 485 } 486 487 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 488 { 489 struct inode *new = NULL; 490 int status = 0; 491 int i; 492 493 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 494 i < NUM_SYSTEM_INODES; 495 i++) { 496 if (!ocfs2_need_system_inode(osb, i)) 497 continue; 498 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 499 if (!new) { 500 ocfs2_release_system_inodes(osb); 501 status = -EINVAL; 502 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 503 status, i, osb->slot_num); 504 goto bail; 505 } 506 /* the array now has one ref, so drop this one */ 507 iput(new); 508 } 509 510 bail: 511 if (status) 512 mlog_errno(status); 513 return status; 514 } 515 516 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 517 { 518 int i; 519 struct inode *inode; 520 521 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 522 inode = osb->global_system_inodes[i]; 523 if (inode) { 524 iput(inode); 525 osb->global_system_inodes[i] = NULL; 526 } 527 } 528 529 inode = osb->sys_root_inode; 530 if (inode) { 531 iput(inode); 532 osb->sys_root_inode = NULL; 533 } 534 535 inode = osb->root_inode; 536 if (inode) { 537 iput(inode); 538 osb->root_inode = NULL; 539 } 540 541 if (!osb->local_system_inodes) 542 return; 543 544 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 545 if (osb->local_system_inodes[i]) { 546 iput(osb->local_system_inodes[i]); 547 osb->local_system_inodes[i] = NULL; 548 } 549 } 550 551 kfree(osb->local_system_inodes); 552 osb->local_system_inodes = NULL; 553 } 554 555 /* We're allocating fs objects, use GFP_NOFS */ 556 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 557 { 558 struct ocfs2_inode_info *oi; 559 560 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 561 if (!oi) 562 return NULL; 563 564 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 565 return &oi->vfs_inode; 566 } 567 568 static void ocfs2_i_callback(struct rcu_head *head) 569 { 570 struct inode *inode = container_of(head, struct inode, i_rcu); 571 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 572 } 573 574 static void ocfs2_destroy_inode(struct inode *inode) 575 { 576 call_rcu(&inode->i_rcu, ocfs2_i_callback); 577 } 578 579 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 580 unsigned int cbits) 581 { 582 unsigned int bytes = 1 << cbits; 583 unsigned int trim = bytes; 584 unsigned int bitshift = 32; 585 586 /* 587 * i_size and all block offsets in ocfs2 are always 64 bits 588 * wide. i_clusters is 32 bits, in cluster-sized units. So on 589 * 64 bit platforms, cluster size will be the limiting factor. 590 */ 591 592 #if BITS_PER_LONG == 32 593 # if defined(CONFIG_LBDAF) 594 BUILD_BUG_ON(sizeof(sector_t) != 8); 595 /* 596 * We might be limited by page cache size. 597 */ 598 if (bytes > PAGE_CACHE_SIZE) { 599 bytes = PAGE_CACHE_SIZE; 600 trim = 1; 601 /* 602 * Shift by 31 here so that we don't get larger than 603 * MAX_LFS_FILESIZE 604 */ 605 bitshift = 31; 606 } 607 # else 608 /* 609 * We are limited by the size of sector_t. Use block size, as 610 * that's what we expose to the VFS. 611 */ 612 bytes = 1 << bbits; 613 trim = 1; 614 bitshift = 31; 615 # endif 616 #endif 617 618 /* 619 * Trim by a whole cluster when we can actually approach the 620 * on-disk limits. Otherwise we can overflow i_clusters when 621 * an extent start is at the max offset. 622 */ 623 return (((unsigned long long)bytes) << bitshift) - trim; 624 } 625 626 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 627 { 628 int incompat_features; 629 int ret = 0; 630 struct mount_options parsed_options; 631 struct ocfs2_super *osb = OCFS2_SB(sb); 632 u32 tmp; 633 634 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 635 !ocfs2_check_set_options(sb, &parsed_options)) { 636 ret = -EINVAL; 637 goto out; 638 } 639 640 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 641 OCFS2_MOUNT_HB_NONE; 642 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 643 ret = -EINVAL; 644 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 645 goto out; 646 } 647 648 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 649 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 650 ret = -EINVAL; 651 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 652 goto out; 653 } 654 655 /* Probably don't want this on remount; it might 656 * mess with other nodes */ 657 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 658 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 659 ret = -EINVAL; 660 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 661 goto out; 662 } 663 664 /* We're going to/from readonly mode. */ 665 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 666 /* Disable quota accounting before remounting RO */ 667 if (*flags & MS_RDONLY) { 668 ret = ocfs2_susp_quotas(osb, 0); 669 if (ret < 0) 670 goto out; 671 } 672 /* Lock here so the check of HARD_RO and the potential 673 * setting of SOFT_RO is atomic. */ 674 spin_lock(&osb->osb_lock); 675 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 676 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 677 ret = -EROFS; 678 goto unlock_osb; 679 } 680 681 if (*flags & MS_RDONLY) { 682 sb->s_flags |= MS_RDONLY; 683 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 684 } else { 685 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 686 mlog(ML_ERROR, "Cannot remount RDWR " 687 "filesystem due to previous errors.\n"); 688 ret = -EROFS; 689 goto unlock_osb; 690 } 691 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 692 if (incompat_features) { 693 mlog(ML_ERROR, "Cannot remount RDWR because " 694 "of unsupported optional features " 695 "(%x).\n", incompat_features); 696 ret = -EINVAL; 697 goto unlock_osb; 698 } 699 sb->s_flags &= ~MS_RDONLY; 700 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 701 } 702 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 703 unlock_osb: 704 spin_unlock(&osb->osb_lock); 705 /* Enable quota accounting after remounting RW */ 706 if (!ret && !(*flags & MS_RDONLY)) { 707 if (sb_any_quota_suspended(sb)) 708 ret = ocfs2_susp_quotas(osb, 1); 709 else 710 ret = ocfs2_enable_quotas(osb); 711 if (ret < 0) { 712 /* Return back changes... */ 713 spin_lock(&osb->osb_lock); 714 sb->s_flags |= MS_RDONLY; 715 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 716 spin_unlock(&osb->osb_lock); 717 goto out; 718 } 719 } 720 } 721 722 if (!ret) { 723 /* Only save off the new mount options in case of a successful 724 * remount. */ 725 osb->s_mount_opt = parsed_options.mount_opt; 726 osb->s_atime_quantum = parsed_options.atime_quantum; 727 osb->preferred_slot = parsed_options.slot; 728 if (parsed_options.commit_interval) 729 osb->osb_commit_interval = parsed_options.commit_interval; 730 731 if (!ocfs2_is_hard_readonly(osb)) 732 ocfs2_set_journal_params(osb); 733 734 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 735 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 736 MS_POSIXACL : 0); 737 } 738 out: 739 return ret; 740 } 741 742 static int ocfs2_sb_probe(struct super_block *sb, 743 struct buffer_head **bh, 744 int *sector_size, 745 struct ocfs2_blockcheck_stats *stats) 746 { 747 int status, tmpstat; 748 struct ocfs1_vol_disk_hdr *hdr; 749 struct ocfs2_dinode *di; 750 int blksize; 751 752 *bh = NULL; 753 754 /* may be > 512 */ 755 *sector_size = bdev_logical_block_size(sb->s_bdev); 756 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 757 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 758 *sector_size, OCFS2_MAX_BLOCKSIZE); 759 status = -EINVAL; 760 goto bail; 761 } 762 763 /* Can this really happen? */ 764 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 765 *sector_size = OCFS2_MIN_BLOCKSIZE; 766 767 /* check block zero for old format */ 768 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 769 if (status < 0) { 770 mlog_errno(status); 771 goto bail; 772 } 773 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 774 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 775 mlog(ML_ERROR, "incompatible version: %u.%u\n", 776 hdr->major_version, hdr->minor_version); 777 status = -EINVAL; 778 } 779 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 780 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 781 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 782 hdr->signature); 783 status = -EINVAL; 784 } 785 brelse(*bh); 786 *bh = NULL; 787 if (status < 0) { 788 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 789 "upgraded before mounting with ocfs v2\n"); 790 goto bail; 791 } 792 793 /* 794 * Now check at magic offset for 512, 1024, 2048, 4096 795 * blocksizes. 4096 is the maximum blocksize because it is 796 * the minimum clustersize. 797 */ 798 status = -EINVAL; 799 for (blksize = *sector_size; 800 blksize <= OCFS2_MAX_BLOCKSIZE; 801 blksize <<= 1) { 802 tmpstat = ocfs2_get_sector(sb, bh, 803 OCFS2_SUPER_BLOCK_BLKNO, 804 blksize); 805 if (tmpstat < 0) { 806 status = tmpstat; 807 mlog_errno(status); 808 break; 809 } 810 di = (struct ocfs2_dinode *) (*bh)->b_data; 811 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 812 spin_lock_init(&stats->b_lock); 813 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 814 if (tmpstat < 0) { 815 brelse(*bh); 816 *bh = NULL; 817 } 818 if (tmpstat != -EAGAIN) { 819 status = tmpstat; 820 break; 821 } 822 } 823 824 bail: 825 return status; 826 } 827 828 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 829 { 830 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 831 832 if (osb->s_mount_opt & hb_enabled) { 833 if (ocfs2_mount_local(osb)) { 834 mlog(ML_ERROR, "Cannot heartbeat on a locally " 835 "mounted device.\n"); 836 return -EINVAL; 837 } 838 if (ocfs2_userspace_stack(osb)) { 839 mlog(ML_ERROR, "Userspace stack expected, but " 840 "o2cb heartbeat arguments passed to mount\n"); 841 return -EINVAL; 842 } 843 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 844 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 845 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 846 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 847 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 848 return -EINVAL; 849 } 850 } 851 852 if (!(osb->s_mount_opt & hb_enabled)) { 853 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 854 !ocfs2_userspace_stack(osb)) { 855 mlog(ML_ERROR, "Heartbeat has to be started to mount " 856 "a read-write clustered device.\n"); 857 return -EINVAL; 858 } 859 } 860 861 return 0; 862 } 863 864 /* 865 * If we're using a userspace stack, mount should have passed 866 * a name that matches the disk. If not, mount should not 867 * have passed a stack. 868 */ 869 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 870 struct mount_options *mopt) 871 { 872 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 873 mlog(ML_ERROR, 874 "cluster stack passed to mount, but this filesystem " 875 "does not support it\n"); 876 return -EINVAL; 877 } 878 879 if (ocfs2_userspace_stack(osb) && 880 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 881 OCFS2_STACK_LABEL_LEN)) { 882 mlog(ML_ERROR, 883 "cluster stack passed to mount (\"%s\") does not " 884 "match the filesystem (\"%s\")\n", 885 mopt->cluster_stack, 886 osb->osb_cluster_stack); 887 return -EINVAL; 888 } 889 890 return 0; 891 } 892 893 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 894 { 895 int type; 896 struct super_block *sb = osb->sb; 897 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 898 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 899 int status = 0; 900 901 for (type = 0; type < MAXQUOTAS; type++) { 902 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 903 continue; 904 if (unsuspend) 905 status = dquot_resume(sb, type); 906 else { 907 struct ocfs2_mem_dqinfo *oinfo; 908 909 /* Cancel periodic syncing before suspending */ 910 oinfo = sb_dqinfo(sb, type)->dqi_priv; 911 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 912 status = dquot_suspend(sb, type); 913 } 914 if (status < 0) 915 break; 916 } 917 if (status < 0) 918 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 919 "remount (error = %d).\n", status); 920 return status; 921 } 922 923 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 924 { 925 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 926 struct super_block *sb = osb->sb; 927 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 928 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 929 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 930 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 931 int status; 932 int type; 933 934 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 935 for (type = 0; type < MAXQUOTAS; type++) { 936 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 937 continue; 938 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 939 osb->slot_num); 940 if (!inode[type]) { 941 status = -ENOENT; 942 goto out_quota_off; 943 } 944 status = dquot_enable(inode[type], type, QFMT_OCFS2, 945 DQUOT_USAGE_ENABLED); 946 if (status < 0) 947 goto out_quota_off; 948 } 949 950 for (type = 0; type < MAXQUOTAS; type++) 951 iput(inode[type]); 952 return 0; 953 out_quota_off: 954 ocfs2_disable_quotas(osb); 955 for (type = 0; type < MAXQUOTAS; type++) 956 iput(inode[type]); 957 mlog_errno(status); 958 return status; 959 } 960 961 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 962 { 963 int type; 964 struct inode *inode; 965 struct super_block *sb = osb->sb; 966 struct ocfs2_mem_dqinfo *oinfo; 967 968 /* We mostly ignore errors in this function because there's not much 969 * we can do when we see them */ 970 for (type = 0; type < MAXQUOTAS; type++) { 971 if (!sb_has_quota_loaded(sb, type)) 972 continue; 973 /* Cancel periodic syncing before we grab dqonoff_mutex */ 974 oinfo = sb_dqinfo(sb, type)->dqi_priv; 975 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 976 inode = igrab(sb->s_dquot.files[type]); 977 /* Turn off quotas. This will remove all dquot structures from 978 * memory and so they will be automatically synced to global 979 * quota files */ 980 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 981 DQUOT_LIMITS_ENABLED); 982 if (!inode) 983 continue; 984 iput(inode); 985 } 986 } 987 988 /* Handle quota on quotactl */ 989 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id) 990 { 991 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 992 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 993 994 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 995 return -EINVAL; 996 997 return dquot_enable(sb_dqopt(sb)->files[type], type, 998 format_id, DQUOT_LIMITS_ENABLED); 999 } 1000 1001 /* Handle quota off quotactl */ 1002 static int ocfs2_quota_off(struct super_block *sb, int type) 1003 { 1004 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 1005 } 1006 1007 static const struct quotactl_ops ocfs2_quotactl_ops = { 1008 .quota_on_meta = ocfs2_quota_on, 1009 .quota_off = ocfs2_quota_off, 1010 .quota_sync = dquot_quota_sync, 1011 .get_info = dquot_get_dqinfo, 1012 .set_info = dquot_set_dqinfo, 1013 .get_dqblk = dquot_get_dqblk, 1014 .set_dqblk = dquot_set_dqblk, 1015 }; 1016 1017 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1018 { 1019 struct dentry *root; 1020 int status, sector_size; 1021 struct mount_options parsed_options; 1022 struct inode *inode = NULL; 1023 struct ocfs2_super *osb = NULL; 1024 struct buffer_head *bh = NULL; 1025 char nodestr[12]; 1026 struct ocfs2_blockcheck_stats stats; 1027 1028 trace_ocfs2_fill_super(sb, data, silent); 1029 1030 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1031 status = -EINVAL; 1032 goto read_super_error; 1033 } 1034 1035 /* probe for superblock */ 1036 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1037 if (status < 0) { 1038 mlog(ML_ERROR, "superblock probe failed!\n"); 1039 goto read_super_error; 1040 } 1041 1042 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1043 osb = OCFS2_SB(sb); 1044 if (status < 0) { 1045 mlog_errno(status); 1046 goto read_super_error; 1047 } 1048 brelse(bh); 1049 bh = NULL; 1050 1051 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1052 status = -EINVAL; 1053 goto read_super_error; 1054 } 1055 osb->s_mount_opt = parsed_options.mount_opt; 1056 osb->s_atime_quantum = parsed_options.atime_quantum; 1057 osb->preferred_slot = parsed_options.slot; 1058 osb->osb_commit_interval = parsed_options.commit_interval; 1059 1060 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1061 osb->osb_resv_level = parsed_options.resv_level; 1062 osb->osb_dir_resv_level = parsed_options.resv_level; 1063 if (parsed_options.dir_resv_level == -1) 1064 osb->osb_dir_resv_level = parsed_options.resv_level; 1065 else 1066 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1067 1068 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1069 if (status) 1070 goto read_super_error; 1071 1072 sb->s_magic = OCFS2_SUPER_MAGIC; 1073 1074 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1075 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1076 1077 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1078 * heartbeat=none */ 1079 if (bdev_read_only(sb->s_bdev)) { 1080 if (!(sb->s_flags & MS_RDONLY)) { 1081 status = -EACCES; 1082 mlog(ML_ERROR, "Readonly device detected but readonly " 1083 "mount was not specified.\n"); 1084 goto read_super_error; 1085 } 1086 1087 /* You should not be able to start a local heartbeat 1088 * on a readonly device. */ 1089 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1090 status = -EROFS; 1091 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1092 "device.\n"); 1093 goto read_super_error; 1094 } 1095 1096 status = ocfs2_check_journals_nolocks(osb); 1097 if (status < 0) { 1098 if (status == -EROFS) 1099 mlog(ML_ERROR, "Recovery required on readonly " 1100 "file system, but write access is " 1101 "unavailable.\n"); 1102 else 1103 mlog_errno(status); 1104 goto read_super_error; 1105 } 1106 1107 ocfs2_set_ro_flag(osb, 1); 1108 1109 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1110 "Cluster services will not be used for this mount. " 1111 "Recovery will be skipped.\n", osb->dev_str); 1112 } 1113 1114 if (!ocfs2_is_hard_readonly(osb)) { 1115 if (sb->s_flags & MS_RDONLY) 1116 ocfs2_set_ro_flag(osb, 0); 1117 } 1118 1119 status = ocfs2_verify_heartbeat(osb); 1120 if (status < 0) { 1121 mlog_errno(status); 1122 goto read_super_error; 1123 } 1124 1125 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1126 ocfs2_debugfs_root); 1127 if (!osb->osb_debug_root) { 1128 status = -EINVAL; 1129 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1130 goto read_super_error; 1131 } 1132 1133 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1134 osb->osb_debug_root, 1135 osb, 1136 &ocfs2_osb_debug_fops); 1137 if (!osb->osb_ctxt) { 1138 status = -EINVAL; 1139 mlog_errno(status); 1140 goto read_super_error; 1141 } 1142 1143 if (ocfs2_meta_ecc(osb)) { 1144 status = ocfs2_blockcheck_stats_debugfs_install( 1145 &osb->osb_ecc_stats, 1146 osb->osb_debug_root); 1147 if (status) { 1148 mlog(ML_ERROR, 1149 "Unable to create blockcheck statistics " 1150 "files\n"); 1151 goto read_super_error; 1152 } 1153 } 1154 1155 status = ocfs2_mount_volume(sb); 1156 if (status < 0) 1157 goto read_super_error; 1158 1159 if (osb->root_inode) 1160 inode = igrab(osb->root_inode); 1161 1162 if (!inode) { 1163 status = -EIO; 1164 mlog_errno(status); 1165 goto read_super_error; 1166 } 1167 1168 root = d_make_root(inode); 1169 if (!root) { 1170 status = -ENOMEM; 1171 mlog_errno(status); 1172 goto read_super_error; 1173 } 1174 1175 sb->s_root = root; 1176 1177 ocfs2_complete_mount_recovery(osb); 1178 1179 if (ocfs2_mount_local(osb)) 1180 snprintf(nodestr, sizeof(nodestr), "local"); 1181 else 1182 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1183 1184 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1185 "with %s data mode.\n", 1186 osb->dev_str, nodestr, osb->slot_num, 1187 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1188 "ordered"); 1189 1190 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1191 wake_up(&osb->osb_mount_event); 1192 1193 /* Now we can initialize quotas because we can afford to wait 1194 * for cluster locks recovery now. That also means that truncation 1195 * log recovery can happen but that waits for proper quota setup */ 1196 if (!(sb->s_flags & MS_RDONLY)) { 1197 status = ocfs2_enable_quotas(osb); 1198 if (status < 0) { 1199 /* We have to err-out specially here because 1200 * s_root is already set */ 1201 mlog_errno(status); 1202 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1203 wake_up(&osb->osb_mount_event); 1204 return status; 1205 } 1206 } 1207 1208 ocfs2_complete_quota_recovery(osb); 1209 1210 /* Now we wake up again for processes waiting for quotas */ 1211 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1212 wake_up(&osb->osb_mount_event); 1213 1214 /* Start this when the mount is almost sure of being successful */ 1215 ocfs2_orphan_scan_start(osb); 1216 1217 return status; 1218 1219 read_super_error: 1220 brelse(bh); 1221 1222 if (osb) { 1223 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1224 wake_up(&osb->osb_mount_event); 1225 ocfs2_dismount_volume(sb, 1); 1226 } 1227 1228 if (status) 1229 mlog_errno(status); 1230 return status; 1231 } 1232 1233 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1234 int flags, 1235 const char *dev_name, 1236 void *data) 1237 { 1238 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1239 } 1240 1241 static void ocfs2_kill_sb(struct super_block *sb) 1242 { 1243 struct ocfs2_super *osb = OCFS2_SB(sb); 1244 1245 /* Failed mount? */ 1246 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1247 goto out; 1248 1249 /* Prevent further queueing of inode drop events */ 1250 spin_lock(&dentry_list_lock); 1251 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1252 spin_unlock(&dentry_list_lock); 1253 /* Wait for work to finish and/or remove it */ 1254 cancel_work_sync(&osb->dentry_lock_work); 1255 out: 1256 kill_block_super(sb); 1257 } 1258 1259 static struct file_system_type ocfs2_fs_type = { 1260 .owner = THIS_MODULE, 1261 .name = "ocfs2", 1262 .mount = ocfs2_mount, 1263 .kill_sb = ocfs2_kill_sb, 1264 1265 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1266 .next = NULL 1267 }; 1268 MODULE_ALIAS_FS("ocfs2"); 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 /* 1822 * Make sure all delayed rcu free inodes are flushed before we 1823 * destroy cache. 1824 */ 1825 rcu_barrier(); 1826 if (ocfs2_inode_cachep) 1827 kmem_cache_destroy(ocfs2_inode_cachep); 1828 ocfs2_inode_cachep = NULL; 1829 1830 if (ocfs2_dquot_cachep) 1831 kmem_cache_destroy(ocfs2_dquot_cachep); 1832 ocfs2_dquot_cachep = NULL; 1833 1834 if (ocfs2_qf_chunk_cachep) 1835 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1836 ocfs2_qf_chunk_cachep = NULL; 1837 } 1838 1839 static int ocfs2_get_sector(struct super_block *sb, 1840 struct buffer_head **bh, 1841 int block, 1842 int sect_size) 1843 { 1844 if (!sb_set_blocksize(sb, sect_size)) { 1845 mlog(ML_ERROR, "unable to set blocksize\n"); 1846 return -EIO; 1847 } 1848 1849 *bh = sb_getblk(sb, block); 1850 if (!*bh) { 1851 mlog_errno(-ENOMEM); 1852 return -ENOMEM; 1853 } 1854 lock_buffer(*bh); 1855 if (!buffer_dirty(*bh)) 1856 clear_buffer_uptodate(*bh); 1857 unlock_buffer(*bh); 1858 ll_rw_block(READ, 1, bh); 1859 wait_on_buffer(*bh); 1860 if (!buffer_uptodate(*bh)) { 1861 mlog_errno(-EIO); 1862 brelse(*bh); 1863 *bh = NULL; 1864 return -EIO; 1865 } 1866 1867 return 0; 1868 } 1869 1870 static int ocfs2_mount_volume(struct super_block *sb) 1871 { 1872 int status = 0; 1873 int unlock_super = 0; 1874 struct ocfs2_super *osb = OCFS2_SB(sb); 1875 1876 if (ocfs2_is_hard_readonly(osb)) 1877 goto leave; 1878 1879 status = ocfs2_dlm_init(osb); 1880 if (status < 0) { 1881 mlog_errno(status); 1882 goto leave; 1883 } 1884 1885 status = ocfs2_super_lock(osb, 1); 1886 if (status < 0) { 1887 mlog_errno(status); 1888 goto leave; 1889 } 1890 unlock_super = 1; 1891 1892 /* This will load up the node map and add ourselves to it. */ 1893 status = ocfs2_find_slot(osb); 1894 if (status < 0) { 1895 mlog_errno(status); 1896 goto leave; 1897 } 1898 1899 /* load all node-local system inodes */ 1900 status = ocfs2_init_local_system_inodes(osb); 1901 if (status < 0) { 1902 mlog_errno(status); 1903 goto leave; 1904 } 1905 1906 status = ocfs2_check_volume(osb); 1907 if (status < 0) { 1908 mlog_errno(status); 1909 goto leave; 1910 } 1911 1912 status = ocfs2_truncate_log_init(osb); 1913 if (status < 0) 1914 mlog_errno(status); 1915 1916 leave: 1917 if (unlock_super) 1918 ocfs2_super_unlock(osb, 1); 1919 1920 return status; 1921 } 1922 1923 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1924 { 1925 int tmp, hangup_needed = 0; 1926 struct ocfs2_super *osb = NULL; 1927 char nodestr[12]; 1928 1929 trace_ocfs2_dismount_volume(sb); 1930 1931 BUG_ON(!sb); 1932 osb = OCFS2_SB(sb); 1933 BUG_ON(!osb); 1934 1935 debugfs_remove(osb->osb_ctxt); 1936 1937 /* 1938 * Flush inode dropping work queue so that deletes are 1939 * performed while the filesystem is still working 1940 */ 1941 ocfs2_drop_all_dl_inodes(osb); 1942 1943 /* Orphan scan should be stopped as early as possible */ 1944 ocfs2_orphan_scan_stop(osb); 1945 1946 ocfs2_disable_quotas(osb); 1947 1948 ocfs2_shutdown_local_alloc(osb); 1949 1950 ocfs2_truncate_log_shutdown(osb); 1951 1952 /* This will disable recovery and flush any recovery work. */ 1953 ocfs2_recovery_exit(osb); 1954 1955 ocfs2_journal_shutdown(osb); 1956 1957 ocfs2_sync_blockdev(sb); 1958 1959 ocfs2_purge_refcount_trees(osb); 1960 1961 /* No cluster connection means we've failed during mount, so skip 1962 * all the steps which depended on that to complete. */ 1963 if (osb->cconn) { 1964 tmp = ocfs2_super_lock(osb, 1); 1965 if (tmp < 0) { 1966 mlog_errno(tmp); 1967 return; 1968 } 1969 } 1970 1971 if (osb->slot_num != OCFS2_INVALID_SLOT) 1972 ocfs2_put_slot(osb); 1973 1974 if (osb->cconn) 1975 ocfs2_super_unlock(osb, 1); 1976 1977 ocfs2_release_system_inodes(osb); 1978 1979 /* 1980 * If we're dismounting due to mount error, mount.ocfs2 will clean 1981 * up heartbeat. If we're a local mount, there is no heartbeat. 1982 * If we failed before we got a uuid_str yet, we can't stop 1983 * heartbeat. Otherwise, do it. 1984 */ 1985 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1986 !ocfs2_is_hard_readonly(osb)) 1987 hangup_needed = 1; 1988 1989 if (osb->cconn) 1990 ocfs2_dlm_shutdown(osb, hangup_needed); 1991 1992 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1993 debugfs_remove(osb->osb_debug_root); 1994 1995 if (hangup_needed) 1996 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1997 1998 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1999 2000 if (ocfs2_mount_local(osb)) 2001 snprintf(nodestr, sizeof(nodestr), "local"); 2002 else 2003 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 2004 2005 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 2006 osb->dev_str, nodestr); 2007 2008 ocfs2_delete_osb(osb); 2009 kfree(osb); 2010 sb->s_dev = 0; 2011 sb->s_fs_info = NULL; 2012 } 2013 2014 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2015 unsigned uuid_bytes) 2016 { 2017 int i, ret; 2018 char *ptr; 2019 2020 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2021 2022 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2023 if (osb->uuid_str == NULL) 2024 return -ENOMEM; 2025 2026 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2027 /* print with null */ 2028 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2029 if (ret != 2) /* drop super cleans up */ 2030 return -EINVAL; 2031 /* then only advance past the last char */ 2032 ptr += 2; 2033 } 2034 2035 return 0; 2036 } 2037 2038 /* Make sure entire volume is addressable by our journal. Requires 2039 osb_clusters_at_boot to be valid and for the journal to have been 2040 initialized by ocfs2_journal_init(). */ 2041 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2042 { 2043 int status = 0; 2044 u64 max_block = 2045 ocfs2_clusters_to_blocks(osb->sb, 2046 osb->osb_clusters_at_boot) - 1; 2047 2048 /* 32-bit block number is always OK. */ 2049 if (max_block <= (u32)~0ULL) 2050 goto out; 2051 2052 /* Volume is "huge", so see if our journal is new enough to 2053 support it. */ 2054 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2055 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2056 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2057 JBD2_FEATURE_INCOMPAT_64BIT))) { 2058 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2059 "Enable the 'block64' journal option with tunefs.ocfs2"); 2060 status = -EFBIG; 2061 goto out; 2062 } 2063 2064 out: 2065 return status; 2066 } 2067 2068 static int ocfs2_initialize_super(struct super_block *sb, 2069 struct buffer_head *bh, 2070 int sector_size, 2071 struct ocfs2_blockcheck_stats *stats) 2072 { 2073 int status; 2074 int i, cbits, bbits; 2075 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2076 struct inode *inode = NULL; 2077 struct ocfs2_journal *journal; 2078 __le32 uuid_net_key; 2079 struct ocfs2_super *osb; 2080 u64 total_blocks; 2081 2082 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2083 if (!osb) { 2084 status = -ENOMEM; 2085 mlog_errno(status); 2086 goto bail; 2087 } 2088 2089 sb->s_fs_info = osb; 2090 sb->s_op = &ocfs2_sops; 2091 sb->s_d_op = &ocfs2_dentry_ops; 2092 sb->s_export_op = &ocfs2_export_ops; 2093 sb->s_qcop = &ocfs2_quotactl_ops; 2094 sb->dq_op = &ocfs2_quota_operations; 2095 sb->s_xattr = ocfs2_xattr_handlers; 2096 sb->s_time_gran = 1; 2097 sb->s_flags |= MS_NOATIME; 2098 /* this is needed to support O_LARGEFILE */ 2099 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2100 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2101 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2102 2103 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2104 2105 for (i = 0; i < 3; i++) 2106 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2107 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2108 2109 osb->sb = sb; 2110 /* Save off for ocfs2_rw_direct */ 2111 osb->s_sectsize_bits = blksize_bits(sector_size); 2112 BUG_ON(!osb->s_sectsize_bits); 2113 2114 spin_lock_init(&osb->dc_task_lock); 2115 init_waitqueue_head(&osb->dc_event); 2116 osb->dc_work_sequence = 0; 2117 osb->dc_wake_sequence = 0; 2118 INIT_LIST_HEAD(&osb->blocked_lock_list); 2119 osb->blocked_lock_count = 0; 2120 spin_lock_init(&osb->osb_lock); 2121 spin_lock_init(&osb->osb_xattr_lock); 2122 ocfs2_init_steal_slots(osb); 2123 2124 atomic_set(&osb->alloc_stats.moves, 0); 2125 atomic_set(&osb->alloc_stats.local_data, 0); 2126 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2127 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2128 atomic_set(&osb->alloc_stats.bg_extends, 0); 2129 2130 /* Copy the blockcheck stats from the superblock probe */ 2131 osb->osb_ecc_stats = *stats; 2132 2133 ocfs2_init_node_maps(osb); 2134 2135 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2136 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2137 2138 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2139 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2140 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2141 osb->max_slots); 2142 status = -EINVAL; 2143 goto bail; 2144 } 2145 2146 ocfs2_orphan_scan_init(osb); 2147 2148 status = ocfs2_recovery_init(osb); 2149 if (status) { 2150 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2151 mlog_errno(status); 2152 goto bail; 2153 } 2154 2155 init_waitqueue_head(&osb->checkpoint_event); 2156 2157 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2158 2159 osb->slot_num = OCFS2_INVALID_SLOT; 2160 2161 osb->s_xattr_inline_size = le16_to_cpu( 2162 di->id2.i_super.s_xattr_inline_size); 2163 2164 osb->local_alloc_state = OCFS2_LA_UNUSED; 2165 osb->local_alloc_bh = NULL; 2166 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2167 2168 init_waitqueue_head(&osb->osb_mount_event); 2169 2170 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2171 if (status) { 2172 mlog_errno(status); 2173 goto bail; 2174 } 2175 2176 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2177 if (!osb->vol_label) { 2178 mlog(ML_ERROR, "unable to alloc vol label\n"); 2179 status = -ENOMEM; 2180 goto bail; 2181 } 2182 2183 osb->slot_recovery_generations = 2184 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2185 GFP_KERNEL); 2186 if (!osb->slot_recovery_generations) { 2187 status = -ENOMEM; 2188 mlog_errno(status); 2189 goto bail; 2190 } 2191 2192 init_waitqueue_head(&osb->osb_wipe_event); 2193 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2194 sizeof(*osb->osb_orphan_wipes), 2195 GFP_KERNEL); 2196 if (!osb->osb_orphan_wipes) { 2197 status = -ENOMEM; 2198 mlog_errno(status); 2199 goto bail; 2200 } 2201 2202 osb->osb_rf_lock_tree = RB_ROOT; 2203 2204 osb->s_feature_compat = 2205 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2206 osb->s_feature_ro_compat = 2207 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2208 osb->s_feature_incompat = 2209 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2210 2211 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2212 mlog(ML_ERROR, "couldn't mount because of unsupported " 2213 "optional features (%x).\n", i); 2214 status = -EINVAL; 2215 goto bail; 2216 } 2217 if (!(osb->sb->s_flags & MS_RDONLY) && 2218 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2219 mlog(ML_ERROR, "couldn't mount RDWR because of " 2220 "unsupported optional features (%x).\n", i); 2221 status = -EINVAL; 2222 goto bail; 2223 } 2224 2225 if (ocfs2_clusterinfo_valid(osb)) { 2226 osb->osb_stackflags = 2227 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2228 memcpy(osb->osb_cluster_stack, 2229 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2230 OCFS2_STACK_LABEL_LEN); 2231 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2232 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2233 mlog(ML_ERROR, 2234 "couldn't mount because of an invalid " 2235 "cluster stack label (%s) \n", 2236 osb->osb_cluster_stack); 2237 status = -EINVAL; 2238 goto bail; 2239 } 2240 } else { 2241 /* The empty string is identical with classic tools that 2242 * don't know about s_cluster_info. */ 2243 osb->osb_cluster_stack[0] = '\0'; 2244 } 2245 2246 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2247 2248 /* FIXME 2249 * This should be done in ocfs2_journal_init(), but unknown 2250 * ordering issues will cause the filesystem to crash. 2251 * If anyone wants to figure out what part of the code 2252 * refers to osb->journal before ocfs2_journal_init() is run, 2253 * be my guest. 2254 */ 2255 /* initialize our journal structure */ 2256 2257 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2258 if (!journal) { 2259 mlog(ML_ERROR, "unable to alloc journal\n"); 2260 status = -ENOMEM; 2261 goto bail; 2262 } 2263 osb->journal = journal; 2264 journal->j_osb = osb; 2265 2266 atomic_set(&journal->j_num_trans, 0); 2267 init_rwsem(&journal->j_trans_barrier); 2268 init_waitqueue_head(&journal->j_checkpointed); 2269 spin_lock_init(&journal->j_lock); 2270 journal->j_trans_id = (unsigned long) 1; 2271 INIT_LIST_HEAD(&journal->j_la_cleanups); 2272 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2273 journal->j_state = OCFS2_JOURNAL_FREE; 2274 2275 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2276 osb->dentry_lock_list = NULL; 2277 2278 /* get some pseudo constants for clustersize bits */ 2279 osb->s_clustersize_bits = 2280 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2281 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2282 2283 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2284 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2285 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2286 osb->s_clustersize); 2287 status = -EINVAL; 2288 goto bail; 2289 } 2290 2291 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2292 le32_to_cpu(di->i_clusters)); 2293 2294 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2295 total_blocks); 2296 if (status) { 2297 mlog(ML_ERROR, "Volume too large " 2298 "to mount safely on this system"); 2299 status = -EFBIG; 2300 goto bail; 2301 } 2302 2303 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2304 sizeof(di->id2.i_super.s_uuid))) { 2305 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2306 status = -ENOMEM; 2307 goto bail; 2308 } 2309 2310 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2311 2312 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2313 osb->vol_label[63] = '\0'; 2314 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2315 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2316 osb->first_cluster_group_blkno = 2317 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2318 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2319 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2320 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2321 (unsigned long long)osb->root_blkno, 2322 (unsigned long long)osb->system_dir_blkno, 2323 osb->s_clustersize_bits); 2324 2325 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2326 if (!osb->osb_dlm_debug) { 2327 status = -ENOMEM; 2328 mlog_errno(status); 2329 goto bail; 2330 } 2331 2332 atomic_set(&osb->vol_state, VOLUME_INIT); 2333 2334 /* load root, system_dir, and all global system inodes */ 2335 status = ocfs2_init_global_system_inodes(osb); 2336 if (status < 0) { 2337 mlog_errno(status); 2338 goto bail; 2339 } 2340 2341 /* 2342 * global bitmap 2343 */ 2344 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2345 OCFS2_INVALID_SLOT); 2346 if (!inode) { 2347 status = -EINVAL; 2348 mlog_errno(status); 2349 goto bail; 2350 } 2351 2352 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2353 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2354 iput(inode); 2355 2356 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2357 osb->s_feature_incompat) * 8; 2358 2359 status = ocfs2_init_slot_info(osb); 2360 if (status < 0) { 2361 mlog_errno(status); 2362 goto bail; 2363 } 2364 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb); 2365 2366 bail: 2367 return status; 2368 } 2369 2370 /* 2371 * will return: -EAGAIN if it is ok to keep searching for superblocks 2372 * -EINVAL if there is a bad superblock 2373 * 0 on success 2374 */ 2375 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2376 struct buffer_head *bh, 2377 u32 blksz, 2378 struct ocfs2_blockcheck_stats *stats) 2379 { 2380 int status = -EAGAIN; 2381 2382 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2383 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2384 /* We have to do a raw check of the feature here */ 2385 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2386 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2387 status = ocfs2_block_check_validate(bh->b_data, 2388 bh->b_size, 2389 &di->i_check, 2390 stats); 2391 if (status) 2392 goto out; 2393 } 2394 status = -EINVAL; 2395 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2396 mlog(ML_ERROR, "found superblock with incorrect block " 2397 "size: found %u, should be %u\n", 2398 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2399 blksz); 2400 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2401 OCFS2_MAJOR_REV_LEVEL || 2402 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2403 OCFS2_MINOR_REV_LEVEL) { 2404 mlog(ML_ERROR, "found superblock with bad version: " 2405 "found %u.%u, should be %u.%u\n", 2406 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2407 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2408 OCFS2_MAJOR_REV_LEVEL, 2409 OCFS2_MINOR_REV_LEVEL); 2410 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2411 mlog(ML_ERROR, "bad block number on superblock: " 2412 "found %llu, should be %llu\n", 2413 (unsigned long long)le64_to_cpu(di->i_blkno), 2414 (unsigned long long)bh->b_blocknr); 2415 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2416 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2417 mlog(ML_ERROR, "bad cluster size found: %u\n", 2418 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2419 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2420 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2421 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2422 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2423 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2424 mlog(ML_ERROR, 2425 "Superblock slots found greater than file system " 2426 "maximum: found %u, max %u\n", 2427 le16_to_cpu(di->id2.i_super.s_max_slots), 2428 OCFS2_MAX_SLOTS); 2429 } else { 2430 /* found it! */ 2431 status = 0; 2432 } 2433 } 2434 2435 out: 2436 if (status && status != -EAGAIN) 2437 mlog_errno(status); 2438 return status; 2439 } 2440 2441 static int ocfs2_check_volume(struct ocfs2_super *osb) 2442 { 2443 int status; 2444 int dirty; 2445 int local; 2446 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2447 * recover 2448 * ourselves. */ 2449 2450 /* Init our journal object. */ 2451 status = ocfs2_journal_init(osb->journal, &dirty); 2452 if (status < 0) { 2453 mlog(ML_ERROR, "Could not initialize journal!\n"); 2454 goto finally; 2455 } 2456 2457 /* Now that journal has been initialized, check to make sure 2458 entire volume is addressable. */ 2459 status = ocfs2_journal_addressable(osb); 2460 if (status) 2461 goto finally; 2462 2463 /* If the journal was unmounted cleanly then we don't want to 2464 * recover anything. Otherwise, journal_load will do that 2465 * dirty work for us :) */ 2466 if (!dirty) { 2467 status = ocfs2_journal_wipe(osb->journal, 0); 2468 if (status < 0) { 2469 mlog_errno(status); 2470 goto finally; 2471 } 2472 } else { 2473 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2474 "unmounted cleanly, recovering it.\n", osb->dev_str); 2475 } 2476 2477 local = ocfs2_mount_local(osb); 2478 2479 /* will play back anything left in the journal. */ 2480 status = ocfs2_journal_load(osb->journal, local, dirty); 2481 if (status < 0) { 2482 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2483 goto finally; 2484 } 2485 2486 if (dirty) { 2487 /* recover my local alloc if we didn't unmount cleanly. */ 2488 status = ocfs2_begin_local_alloc_recovery(osb, 2489 osb->slot_num, 2490 &local_alloc); 2491 if (status < 0) { 2492 mlog_errno(status); 2493 goto finally; 2494 } 2495 /* we complete the recovery process after we've marked 2496 * ourselves as mounted. */ 2497 } 2498 2499 status = ocfs2_load_local_alloc(osb); 2500 if (status < 0) { 2501 mlog_errno(status); 2502 goto finally; 2503 } 2504 2505 if (dirty) { 2506 /* Recovery will be completed after we've mounted the 2507 * rest of the volume. */ 2508 osb->dirty = 1; 2509 osb->local_alloc_copy = local_alloc; 2510 local_alloc = NULL; 2511 } 2512 2513 /* go through each journal, trylock it and if you get the 2514 * lock, and it's marked as dirty, set the bit in the recover 2515 * map and launch a recovery thread for it. */ 2516 status = ocfs2_mark_dead_nodes(osb); 2517 if (status < 0) { 2518 mlog_errno(status); 2519 goto finally; 2520 } 2521 2522 status = ocfs2_compute_replay_slots(osb); 2523 if (status < 0) 2524 mlog_errno(status); 2525 2526 finally: 2527 kfree(local_alloc); 2528 2529 if (status) 2530 mlog_errno(status); 2531 return status; 2532 } 2533 2534 /* 2535 * The routine gets called from dismount or close whenever a dismount on 2536 * volume is requested and the osb open count becomes 1. 2537 * It will remove the osb from the global list and also free up all the 2538 * initialized resources and fileobject. 2539 */ 2540 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2541 { 2542 /* This function assumes that the caller has the main osb resource */ 2543 2544 ocfs2_free_slot_info(osb); 2545 2546 kfree(osb->osb_orphan_wipes); 2547 kfree(osb->slot_recovery_generations); 2548 /* FIXME 2549 * This belongs in journal shutdown, but because we have to 2550 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2551 * we free it here. 2552 */ 2553 kfree(osb->journal); 2554 kfree(osb->local_alloc_copy); 2555 kfree(osb->uuid_str); 2556 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2557 memset(osb, 0, sizeof(struct ocfs2_super)); 2558 } 2559 2560 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2561 * panic(). We do not support continue-on-error operation. */ 2562 static void ocfs2_handle_error(struct super_block *sb) 2563 { 2564 struct ocfs2_super *osb = OCFS2_SB(sb); 2565 2566 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2567 panic("OCFS2: (device %s): panic forced after error\n", 2568 sb->s_id); 2569 2570 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2571 2572 if (sb->s_flags & MS_RDONLY && 2573 (ocfs2_is_soft_readonly(osb) || 2574 ocfs2_is_hard_readonly(osb))) 2575 return; 2576 2577 printk(KERN_CRIT "File system is now read-only due to the potential " 2578 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2579 "system is unmounted.\n"); 2580 sb->s_flags |= MS_RDONLY; 2581 ocfs2_set_ro_flag(osb, 0); 2582 } 2583 2584 static char error_buf[1024]; 2585 2586 void __ocfs2_error(struct super_block *sb, 2587 const char *function, 2588 const char *fmt, ...) 2589 { 2590 va_list args; 2591 2592 va_start(args, fmt); 2593 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2594 va_end(args); 2595 2596 /* Not using mlog here because we want to show the actual 2597 * function the error came from. */ 2598 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2599 sb->s_id, function, error_buf); 2600 2601 ocfs2_handle_error(sb); 2602 } 2603 2604 /* Handle critical errors. This is intentionally more drastic than 2605 * ocfs2_handle_error, so we only use for things like journal errors, 2606 * etc. */ 2607 void __ocfs2_abort(struct super_block* sb, 2608 const char *function, 2609 const char *fmt, ...) 2610 { 2611 va_list args; 2612 2613 va_start(args, fmt); 2614 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2615 va_end(args); 2616 2617 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2618 sb->s_id, function, error_buf); 2619 2620 /* We don't have the cluster support yet to go straight to 2621 * hard readonly in here. Until then, we want to keep 2622 * ocfs2_abort() so that we can at least mark critical 2623 * errors. 2624 * 2625 * TODO: This should abort the journal and alert other nodes 2626 * that our slot needs recovery. */ 2627 2628 /* Force a panic(). This stinks, but it's better than letting 2629 * things continue without having a proper hard readonly 2630 * here. */ 2631 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2632 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2633 ocfs2_handle_error(sb); 2634 } 2635 2636 /* 2637 * Void signal blockers, because in-kernel sigprocmask() only fails 2638 * when SIG_* is wrong. 2639 */ 2640 void ocfs2_block_signals(sigset_t *oldset) 2641 { 2642 int rc; 2643 sigset_t blocked; 2644 2645 sigfillset(&blocked); 2646 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2647 BUG_ON(rc); 2648 } 2649 2650 void ocfs2_unblock_signals(sigset_t *oldset) 2651 { 2652 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2653 BUG_ON(rc); 2654 } 2655 2656 module_init(ocfs2_init); 2657 module_exit(ocfs2_exit); 2658