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/smp_lock.h> 45 46 #define MLOG_MASK_PREFIX ML_SUPER 47 #include <cluster/masklog.h> 48 49 #include "ocfs2.h" 50 51 /* this should be the only file to include a version 1 header */ 52 #include "ocfs1_fs_compat.h" 53 54 #include "alloc.h" 55 #include "blockcheck.h" 56 #include "dlmglue.h" 57 #include "export.h" 58 #include "extent_map.h" 59 #include "heartbeat.h" 60 #include "inode.h" 61 #include "journal.h" 62 #include "localalloc.h" 63 #include "namei.h" 64 #include "slot_map.h" 65 #include "super.h" 66 #include "sysfile.h" 67 #include "uptodate.h" 68 #include "ver.h" 69 #include "xattr.h" 70 #include "quota.h" 71 #include "refcounttree.h" 72 #include "suballoc.h" 73 74 #include "buffer_head_io.h" 75 76 static struct kmem_cache *ocfs2_inode_cachep = NULL; 77 struct kmem_cache *ocfs2_dquot_cachep; 78 struct kmem_cache *ocfs2_qf_chunk_cachep; 79 80 /* OCFS2 needs to schedule several differnt types of work which 81 * require cluster locking, disk I/O, recovery waits, etc. Since these 82 * types of work tend to be heavy we avoid using the kernel events 83 * workqueue and schedule on our own. */ 84 struct workqueue_struct *ocfs2_wq = NULL; 85 86 static struct dentry *ocfs2_debugfs_root = NULL; 87 88 MODULE_AUTHOR("Oracle"); 89 MODULE_LICENSE("GPL"); 90 91 struct mount_options 92 { 93 unsigned long commit_interval; 94 unsigned long mount_opt; 95 unsigned int atime_quantum; 96 signed short slot; 97 int localalloc_opt; 98 unsigned int resv_level; 99 int dir_resv_level; 100 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 101 }; 102 103 static int ocfs2_parse_options(struct super_block *sb, char *options, 104 struct mount_options *mopt, 105 int is_remount); 106 static int ocfs2_check_set_options(struct super_block *sb, 107 struct mount_options *options); 108 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 109 static void ocfs2_put_super(struct super_block *sb); 110 static int ocfs2_mount_volume(struct super_block *sb); 111 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 112 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 113 static int ocfs2_initialize_mem_caches(void); 114 static void ocfs2_free_mem_caches(void); 115 static void ocfs2_delete_osb(struct ocfs2_super *osb); 116 117 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 118 119 static int ocfs2_sync_fs(struct super_block *sb, int wait); 120 121 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 122 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 123 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 124 static int ocfs2_check_volume(struct ocfs2_super *osb); 125 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 126 struct buffer_head *bh, 127 u32 sectsize, 128 struct ocfs2_blockcheck_stats *stats); 129 static int ocfs2_initialize_super(struct super_block *sb, 130 struct buffer_head *bh, 131 int sector_size, 132 struct ocfs2_blockcheck_stats *stats); 133 static int ocfs2_get_sector(struct super_block *sb, 134 struct buffer_head **bh, 135 int block, 136 int sect_size); 137 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 138 static void ocfs2_destroy_inode(struct inode *inode); 139 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 140 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 141 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 142 143 static const struct super_operations ocfs2_sops = { 144 .statfs = ocfs2_statfs, 145 .alloc_inode = ocfs2_alloc_inode, 146 .destroy_inode = ocfs2_destroy_inode, 147 .drop_inode = ocfs2_drop_inode, 148 .evict_inode = ocfs2_evict_inode, 149 .sync_fs = ocfs2_sync_fs, 150 .put_super = ocfs2_put_super, 151 .remount_fs = ocfs2_remount, 152 .show_options = ocfs2_show_options, 153 .quota_read = ocfs2_quota_read, 154 .quota_write = ocfs2_quota_write, 155 }; 156 157 enum { 158 Opt_barrier, 159 Opt_err_panic, 160 Opt_err_ro, 161 Opt_intr, 162 Opt_nointr, 163 Opt_hb_none, 164 Opt_hb_local, 165 Opt_hb_global, 166 Opt_data_ordered, 167 Opt_data_writeback, 168 Opt_atime_quantum, 169 Opt_slot, 170 Opt_commit, 171 Opt_localalloc, 172 Opt_localflocks, 173 Opt_stack, 174 Opt_user_xattr, 175 Opt_nouser_xattr, 176 Opt_inode64, 177 Opt_acl, 178 Opt_noacl, 179 Opt_usrquota, 180 Opt_grpquota, 181 Opt_coherency_buffered, 182 Opt_coherency_full, 183 Opt_resv_level, 184 Opt_dir_resv_level, 185 Opt_err, 186 }; 187 188 static const match_table_t tokens = { 189 {Opt_barrier, "barrier=%u"}, 190 {Opt_err_panic, "errors=panic"}, 191 {Opt_err_ro, "errors=remount-ro"}, 192 {Opt_intr, "intr"}, 193 {Opt_nointr, "nointr"}, 194 {Opt_hb_none, OCFS2_HB_NONE}, 195 {Opt_hb_local, OCFS2_HB_LOCAL}, 196 {Opt_hb_global, OCFS2_HB_GLOBAL}, 197 {Opt_data_ordered, "data=ordered"}, 198 {Opt_data_writeback, "data=writeback"}, 199 {Opt_atime_quantum, "atime_quantum=%u"}, 200 {Opt_slot, "preferred_slot=%u"}, 201 {Opt_commit, "commit=%u"}, 202 {Opt_localalloc, "localalloc=%d"}, 203 {Opt_localflocks, "localflocks"}, 204 {Opt_stack, "cluster_stack=%s"}, 205 {Opt_user_xattr, "user_xattr"}, 206 {Opt_nouser_xattr, "nouser_xattr"}, 207 {Opt_inode64, "inode64"}, 208 {Opt_acl, "acl"}, 209 {Opt_noacl, "noacl"}, 210 {Opt_usrquota, "usrquota"}, 211 {Opt_grpquota, "grpquota"}, 212 {Opt_coherency_buffered, "coherency=buffered"}, 213 {Opt_coherency_full, "coherency=full"}, 214 {Opt_resv_level, "resv_level=%u"}, 215 {Opt_dir_resv_level, "dir_resv_level=%u"}, 216 {Opt_err, NULL} 217 }; 218 219 #ifdef CONFIG_DEBUG_FS 220 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 221 { 222 struct ocfs2_cluster_connection *cconn = osb->cconn; 223 struct ocfs2_recovery_map *rm = osb->recovery_map; 224 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 225 int i, out = 0; 226 227 out += snprintf(buf + out, len - out, 228 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 229 "Device", osb->dev_str, osb->uuid_str, 230 osb->fs_generation, osb->vol_label); 231 232 out += snprintf(buf + out, len - out, 233 "%10s => State: %d Flags: 0x%lX\n", "Volume", 234 atomic_read(&osb->vol_state), osb->osb_flags); 235 236 out += snprintf(buf + out, len - out, 237 "%10s => Block: %lu Cluster: %d\n", "Sizes", 238 osb->sb->s_blocksize, osb->s_clustersize); 239 240 out += snprintf(buf + out, len - out, 241 "%10s => Compat: 0x%X Incompat: 0x%X " 242 "ROcompat: 0x%X\n", 243 "Features", osb->s_feature_compat, 244 osb->s_feature_incompat, osb->s_feature_ro_compat); 245 246 out += snprintf(buf + out, len - out, 247 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 248 osb->s_mount_opt, osb->s_atime_quantum); 249 250 if (cconn) { 251 out += snprintf(buf + out, len - out, 252 "%10s => Stack: %s Name: %*s " 253 "Version: %d.%d\n", "Cluster", 254 (*osb->osb_cluster_stack == '\0' ? 255 "o2cb" : osb->osb_cluster_stack), 256 cconn->cc_namelen, cconn->cc_name, 257 cconn->cc_version.pv_major, 258 cconn->cc_version.pv_minor); 259 } 260 261 spin_lock(&osb->dc_task_lock); 262 out += snprintf(buf + out, len - out, 263 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 264 "WorkSeq: %lu\n", "DownCnvt", 265 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 266 osb->blocked_lock_count, osb->dc_wake_sequence, 267 osb->dc_work_sequence); 268 spin_unlock(&osb->dc_task_lock); 269 270 spin_lock(&osb->osb_lock); 271 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 272 "Recovery", 273 (osb->recovery_thread_task ? 274 task_pid_nr(osb->recovery_thread_task) : -1)); 275 if (rm->rm_used == 0) 276 out += snprintf(buf + out, len - out, " None\n"); 277 else { 278 for (i = 0; i < rm->rm_used; i++) 279 out += snprintf(buf + out, len - out, " %d", 280 rm->rm_entries[i]); 281 out += snprintf(buf + out, len - out, "\n"); 282 } 283 spin_unlock(&osb->osb_lock); 284 285 out += snprintf(buf + out, len - out, 286 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 287 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 288 osb->osb_commit_interval, 289 atomic_read(&osb->needs_checkpoint)); 290 291 out += snprintf(buf + out, len - out, 292 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 293 "Journal", osb->journal->j_state, 294 osb->journal->j_trans_id, 295 atomic_read(&osb->journal->j_num_trans)); 296 297 out += snprintf(buf + out, len - out, 298 "%10s => GlobalAllocs: %d LocalAllocs: %d " 299 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 300 "Stats", 301 atomic_read(&osb->alloc_stats.bitmap_data), 302 atomic_read(&osb->alloc_stats.local_data), 303 atomic_read(&osb->alloc_stats.bg_allocs), 304 atomic_read(&osb->alloc_stats.moves), 305 atomic_read(&osb->alloc_stats.bg_extends)); 306 307 out += snprintf(buf + out, len - out, 308 "%10s => State: %u Descriptor: %llu Size: %u bits " 309 "Default: %u bits\n", 310 "LocalAlloc", osb->local_alloc_state, 311 (unsigned long long)osb->la_last_gd, 312 osb->local_alloc_bits, osb->local_alloc_default_bits); 313 314 spin_lock(&osb->osb_lock); 315 out += snprintf(buf + out, len - out, 316 "%10s => InodeSlot: %d StolenInodes: %d, " 317 "MetaSlot: %d StolenMeta: %d\n", "Steal", 318 osb->s_inode_steal_slot, 319 atomic_read(&osb->s_num_inodes_stolen), 320 osb->s_meta_steal_slot, 321 atomic_read(&osb->s_num_meta_stolen)); 322 spin_unlock(&osb->osb_lock); 323 324 out += snprintf(buf + out, len - out, "OrphanScan => "); 325 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 326 os->os_count, os->os_seqno); 327 out += snprintf(buf + out, len - out, " Last Scan: "); 328 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 329 out += snprintf(buf + out, len - out, "Disabled\n"); 330 else 331 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 332 (get_seconds() - os->os_scantime.tv_sec)); 333 334 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 335 "Slots", "Num", "RecoGen"); 336 for (i = 0; i < osb->max_slots; ++i) { 337 out += snprintf(buf + out, len - out, 338 "%10s %c %3d %10d\n", 339 " ", 340 (i == osb->slot_num ? '*' : ' '), 341 i, osb->slot_recovery_generations[i]); 342 } 343 344 return out; 345 } 346 347 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 348 { 349 struct ocfs2_super *osb = inode->i_private; 350 char *buf = NULL; 351 352 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 353 if (!buf) 354 goto bail; 355 356 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 357 358 file->private_data = buf; 359 360 return 0; 361 bail: 362 return -ENOMEM; 363 } 364 365 static int ocfs2_debug_release(struct inode *inode, struct file *file) 366 { 367 kfree(file->private_data); 368 return 0; 369 } 370 371 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 372 size_t nbytes, loff_t *ppos) 373 { 374 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 375 i_size_read(file->f_mapping->host)); 376 } 377 #else 378 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 379 { 380 return 0; 381 } 382 static int ocfs2_debug_release(struct inode *inode, struct file *file) 383 { 384 return 0; 385 } 386 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 387 size_t nbytes, loff_t *ppos) 388 { 389 return 0; 390 } 391 #endif /* CONFIG_DEBUG_FS */ 392 393 static const struct file_operations ocfs2_osb_debug_fops = { 394 .open = ocfs2_osb_debug_open, 395 .release = ocfs2_debug_release, 396 .read = ocfs2_debug_read, 397 .llseek = generic_file_llseek, 398 }; 399 400 static int ocfs2_sync_fs(struct super_block *sb, int wait) 401 { 402 int status; 403 tid_t target; 404 struct ocfs2_super *osb = OCFS2_SB(sb); 405 406 if (ocfs2_is_hard_readonly(osb)) 407 return -EROFS; 408 409 if (wait) { 410 status = ocfs2_flush_truncate_log(osb); 411 if (status < 0) 412 mlog_errno(status); 413 } else { 414 ocfs2_schedule_truncate_log_flush(osb, 0); 415 } 416 417 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 418 &target)) { 419 if (wait) 420 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 421 target); 422 } 423 return 0; 424 } 425 426 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 427 { 428 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 429 && (ino == USER_QUOTA_SYSTEM_INODE 430 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 431 return 0; 432 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 433 && (ino == GROUP_QUOTA_SYSTEM_INODE 434 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 435 return 0; 436 return 1; 437 } 438 439 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 440 { 441 struct inode *new = NULL; 442 int status = 0; 443 int i; 444 445 mlog_entry_void(); 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 mlog_exit(status); 483 return status; 484 } 485 486 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 487 { 488 struct inode *new = NULL; 489 int status = 0; 490 int i; 491 492 mlog_entry_void(); 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 mlog_exit(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 mlog_entry_void(); 522 523 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 524 inode = osb->global_system_inodes[i]; 525 if (inode) { 526 iput(inode); 527 osb->global_system_inodes[i] = NULL; 528 } 529 } 530 531 inode = osb->sys_root_inode; 532 if (inode) { 533 iput(inode); 534 osb->sys_root_inode = NULL; 535 } 536 537 inode = osb->root_inode; 538 if (inode) { 539 iput(inode); 540 osb->root_inode = NULL; 541 } 542 543 if (!osb->local_system_inodes) 544 goto out; 545 546 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 547 if (osb->local_system_inodes[i]) { 548 iput(osb->local_system_inodes[i]); 549 osb->local_system_inodes[i] = NULL; 550 } 551 } 552 553 kfree(osb->local_system_inodes); 554 osb->local_system_inodes = NULL; 555 556 out: 557 mlog_exit(0); 558 } 559 560 /* We're allocating fs objects, use GFP_NOFS */ 561 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 562 { 563 struct ocfs2_inode_info *oi; 564 565 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 566 if (!oi) 567 return NULL; 568 569 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 570 return &oi->vfs_inode; 571 } 572 573 static void ocfs2_destroy_inode(struct inode *inode) 574 { 575 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 576 } 577 578 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 579 unsigned int cbits) 580 { 581 unsigned int bytes = 1 << cbits; 582 unsigned int trim = bytes; 583 unsigned int bitshift = 32; 584 585 /* 586 * i_size and all block offsets in ocfs2 are always 64 bits 587 * wide. i_clusters is 32 bits, in cluster-sized units. So on 588 * 64 bit platforms, cluster size will be the limiting factor. 589 */ 590 591 #if BITS_PER_LONG == 32 592 # if defined(CONFIG_LBDAF) 593 BUILD_BUG_ON(sizeof(sector_t) != 8); 594 /* 595 * We might be limited by page cache size. 596 */ 597 if (bytes > PAGE_CACHE_SIZE) { 598 bytes = PAGE_CACHE_SIZE; 599 trim = 1; 600 /* 601 * Shift by 31 here so that we don't get larger than 602 * MAX_LFS_FILESIZE 603 */ 604 bitshift = 31; 605 } 606 # else 607 /* 608 * We are limited by the size of sector_t. Use block size, as 609 * that's what we expose to the VFS. 610 */ 611 bytes = 1 << bbits; 612 trim = 1; 613 bitshift = 31; 614 # endif 615 #endif 616 617 /* 618 * Trim by a whole cluster when we can actually approach the 619 * on-disk limits. Otherwise we can overflow i_clusters when 620 * an extent start is at the max offset. 621 */ 622 return (((unsigned long long)bytes) << bitshift) - trim; 623 } 624 625 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 626 { 627 int incompat_features; 628 int ret = 0; 629 struct mount_options parsed_options; 630 struct ocfs2_super *osb = OCFS2_SB(sb); 631 u32 tmp; 632 633 lock_kernel(); 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 mlog(0, "Going to ro mode.\n"); 684 sb->s_flags |= MS_RDONLY; 685 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 686 } else { 687 mlog(0, "Making ro filesystem writeable.\n"); 688 689 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 690 mlog(ML_ERROR, "Cannot remount RDWR " 691 "filesystem due to previous errors.\n"); 692 ret = -EROFS; 693 goto unlock_osb; 694 } 695 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 696 if (incompat_features) { 697 mlog(ML_ERROR, "Cannot remount RDWR because " 698 "of unsupported optional features " 699 "(%x).\n", incompat_features); 700 ret = -EINVAL; 701 goto unlock_osb; 702 } 703 sb->s_flags &= ~MS_RDONLY; 704 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 705 } 706 unlock_osb: 707 spin_unlock(&osb->osb_lock); 708 /* Enable quota accounting after remounting RW */ 709 if (!ret && !(*flags & MS_RDONLY)) { 710 if (sb_any_quota_suspended(sb)) 711 ret = ocfs2_susp_quotas(osb, 1); 712 else 713 ret = ocfs2_enable_quotas(osb); 714 if (ret < 0) { 715 /* Return back changes... */ 716 spin_lock(&osb->osb_lock); 717 sb->s_flags |= MS_RDONLY; 718 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 719 spin_unlock(&osb->osb_lock); 720 goto out; 721 } 722 } 723 } 724 725 if (!ret) { 726 /* Only save off the new mount options in case of a successful 727 * remount. */ 728 osb->s_mount_opt = parsed_options.mount_opt; 729 osb->s_atime_quantum = parsed_options.atime_quantum; 730 osb->preferred_slot = parsed_options.slot; 731 if (parsed_options.commit_interval) 732 osb->osb_commit_interval = parsed_options.commit_interval; 733 734 if (!ocfs2_is_hard_readonly(osb)) 735 ocfs2_set_journal_params(osb); 736 737 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 738 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 739 MS_POSIXACL : 0); 740 } 741 out: 742 unlock_kernel(); 743 return ret; 744 } 745 746 static int ocfs2_sb_probe(struct super_block *sb, 747 struct buffer_head **bh, 748 int *sector_size, 749 struct ocfs2_blockcheck_stats *stats) 750 { 751 int status, tmpstat; 752 struct ocfs1_vol_disk_hdr *hdr; 753 struct ocfs2_dinode *di; 754 int blksize; 755 756 *bh = NULL; 757 758 /* may be > 512 */ 759 *sector_size = bdev_logical_block_size(sb->s_bdev); 760 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 761 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 762 *sector_size, OCFS2_MAX_BLOCKSIZE); 763 status = -EINVAL; 764 goto bail; 765 } 766 767 /* Can this really happen? */ 768 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 769 *sector_size = OCFS2_MIN_BLOCKSIZE; 770 771 /* check block zero for old format */ 772 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 773 if (status < 0) { 774 mlog_errno(status); 775 goto bail; 776 } 777 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 778 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 779 mlog(ML_ERROR, "incompatible version: %u.%u\n", 780 hdr->major_version, hdr->minor_version); 781 status = -EINVAL; 782 } 783 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 784 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 785 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 786 hdr->signature); 787 status = -EINVAL; 788 } 789 brelse(*bh); 790 *bh = NULL; 791 if (status < 0) { 792 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 793 "upgraded before mounting with ocfs v2\n"); 794 goto bail; 795 } 796 797 /* 798 * Now check at magic offset for 512, 1024, 2048, 4096 799 * blocksizes. 4096 is the maximum blocksize because it is 800 * the minimum clustersize. 801 */ 802 status = -EINVAL; 803 for (blksize = *sector_size; 804 blksize <= OCFS2_MAX_BLOCKSIZE; 805 blksize <<= 1) { 806 tmpstat = ocfs2_get_sector(sb, bh, 807 OCFS2_SUPER_BLOCK_BLKNO, 808 blksize); 809 if (tmpstat < 0) { 810 status = tmpstat; 811 mlog_errno(status); 812 break; 813 } 814 di = (struct ocfs2_dinode *) (*bh)->b_data; 815 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 816 spin_lock_init(&stats->b_lock); 817 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 818 if (tmpstat < 0) { 819 brelse(*bh); 820 *bh = NULL; 821 } 822 if (tmpstat != -EAGAIN) { 823 status = tmpstat; 824 break; 825 } 826 } 827 828 bail: 829 return status; 830 } 831 832 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 833 { 834 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 835 836 if (osb->s_mount_opt & hb_enabled) { 837 if (ocfs2_mount_local(osb)) { 838 mlog(ML_ERROR, "Cannot heartbeat on a locally " 839 "mounted device.\n"); 840 return -EINVAL; 841 } 842 if (ocfs2_userspace_stack(osb)) { 843 mlog(ML_ERROR, "Userspace stack expected, but " 844 "o2cb heartbeat arguments passed to mount\n"); 845 return -EINVAL; 846 } 847 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 848 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 849 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 850 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 851 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 852 return -EINVAL; 853 } 854 } 855 856 if (!(osb->s_mount_opt & hb_enabled)) { 857 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 858 !ocfs2_userspace_stack(osb)) { 859 mlog(ML_ERROR, "Heartbeat has to be started to mount " 860 "a read-write clustered device.\n"); 861 return -EINVAL; 862 } 863 } 864 865 return 0; 866 } 867 868 /* 869 * If we're using a userspace stack, mount should have passed 870 * a name that matches the disk. If not, mount should not 871 * have passed a stack. 872 */ 873 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 874 struct mount_options *mopt) 875 { 876 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 877 mlog(ML_ERROR, 878 "cluster stack passed to mount, but this filesystem " 879 "does not support it\n"); 880 return -EINVAL; 881 } 882 883 if (ocfs2_userspace_stack(osb) && 884 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 885 OCFS2_STACK_LABEL_LEN)) { 886 mlog(ML_ERROR, 887 "cluster stack passed to mount (\"%s\") does not " 888 "match the filesystem (\"%s\")\n", 889 mopt->cluster_stack, 890 osb->osb_cluster_stack); 891 return -EINVAL; 892 } 893 894 return 0; 895 } 896 897 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 898 { 899 int type; 900 struct super_block *sb = osb->sb; 901 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 902 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 903 int status = 0; 904 905 for (type = 0; type < MAXQUOTAS; type++) { 906 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 907 continue; 908 if (unsuspend) 909 status = dquot_resume(sb, type); 910 else { 911 struct ocfs2_mem_dqinfo *oinfo; 912 913 /* Cancel periodic syncing before suspending */ 914 oinfo = sb_dqinfo(sb, type)->dqi_priv; 915 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 916 status = dquot_suspend(sb, type); 917 } 918 if (status < 0) 919 break; 920 } 921 if (status < 0) 922 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 923 "remount (error = %d).\n", status); 924 return status; 925 } 926 927 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 928 { 929 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 930 struct super_block *sb = osb->sb; 931 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 932 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 933 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 934 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 935 int status; 936 int type; 937 938 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 939 for (type = 0; type < MAXQUOTAS; type++) { 940 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 941 continue; 942 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 943 osb->slot_num); 944 if (!inode[type]) { 945 status = -ENOENT; 946 goto out_quota_off; 947 } 948 status = dquot_enable(inode[type], type, QFMT_OCFS2, 949 DQUOT_USAGE_ENABLED); 950 if (status < 0) 951 goto out_quota_off; 952 } 953 954 for (type = 0; type < MAXQUOTAS; type++) 955 iput(inode[type]); 956 return 0; 957 out_quota_off: 958 ocfs2_disable_quotas(osb); 959 for (type = 0; type < MAXQUOTAS; type++) 960 iput(inode[type]); 961 mlog_errno(status); 962 return status; 963 } 964 965 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 966 { 967 int type; 968 struct inode *inode; 969 struct super_block *sb = osb->sb; 970 struct ocfs2_mem_dqinfo *oinfo; 971 972 /* We mostly ignore errors in this function because there's not much 973 * we can do when we see them */ 974 for (type = 0; type < MAXQUOTAS; type++) { 975 if (!sb_has_quota_loaded(sb, type)) 976 continue; 977 /* Cancel periodic syncing before we grab dqonoff_mutex */ 978 oinfo = sb_dqinfo(sb, type)->dqi_priv; 979 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 980 inode = igrab(sb->s_dquot.files[type]); 981 /* Turn off quotas. This will remove all dquot structures from 982 * memory and so they will be automatically synced to global 983 * quota files */ 984 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 985 DQUOT_LIMITS_ENABLED); 986 if (!inode) 987 continue; 988 iput(inode); 989 } 990 } 991 992 /* Handle quota on quotactl */ 993 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 994 char *path) 995 { 996 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 997 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 998 999 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 1000 return -EINVAL; 1001 1002 return dquot_enable(sb_dqopt(sb)->files[type], type, 1003 format_id, DQUOT_LIMITS_ENABLED); 1004 } 1005 1006 /* Handle quota off quotactl */ 1007 static int ocfs2_quota_off(struct super_block *sb, int type) 1008 { 1009 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 1010 } 1011 1012 static const struct quotactl_ops ocfs2_quotactl_ops = { 1013 .quota_on = ocfs2_quota_on, 1014 .quota_off = ocfs2_quota_off, 1015 .quota_sync = dquot_quota_sync, 1016 .get_info = dquot_get_dqinfo, 1017 .set_info = dquot_set_dqinfo, 1018 .get_dqblk = dquot_get_dqblk, 1019 .set_dqblk = dquot_set_dqblk, 1020 }; 1021 1022 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1023 { 1024 struct dentry *root; 1025 int status, sector_size; 1026 struct mount_options parsed_options; 1027 struct inode *inode = NULL; 1028 struct ocfs2_super *osb = NULL; 1029 struct buffer_head *bh = NULL; 1030 char nodestr[8]; 1031 struct ocfs2_blockcheck_stats stats; 1032 1033 mlog_entry("%p, %p, %i", sb, data, silent); 1034 1035 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1036 status = -EINVAL; 1037 goto read_super_error; 1038 } 1039 1040 /* probe for superblock */ 1041 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1042 if (status < 0) { 1043 mlog(ML_ERROR, "superblock probe failed!\n"); 1044 goto read_super_error; 1045 } 1046 1047 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1048 osb = OCFS2_SB(sb); 1049 if (status < 0) { 1050 mlog_errno(status); 1051 goto read_super_error; 1052 } 1053 brelse(bh); 1054 bh = NULL; 1055 1056 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1057 status = -EINVAL; 1058 goto read_super_error; 1059 } 1060 osb->s_mount_opt = parsed_options.mount_opt; 1061 osb->s_atime_quantum = parsed_options.atime_quantum; 1062 osb->preferred_slot = parsed_options.slot; 1063 osb->osb_commit_interval = parsed_options.commit_interval; 1064 1065 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1066 osb->osb_resv_level = parsed_options.resv_level; 1067 osb->osb_dir_resv_level = parsed_options.resv_level; 1068 if (parsed_options.dir_resv_level == -1) 1069 osb->osb_dir_resv_level = parsed_options.resv_level; 1070 else 1071 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1072 1073 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1074 if (status) 1075 goto read_super_error; 1076 1077 sb->s_magic = OCFS2_SUPER_MAGIC; 1078 1079 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1080 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1081 1082 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1083 * heartbeat=none */ 1084 if (bdev_read_only(sb->s_bdev)) { 1085 if (!(sb->s_flags & MS_RDONLY)) { 1086 status = -EACCES; 1087 mlog(ML_ERROR, "Readonly device detected but readonly " 1088 "mount was not specified.\n"); 1089 goto read_super_error; 1090 } 1091 1092 /* You should not be able to start a local heartbeat 1093 * on a readonly device. */ 1094 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1095 status = -EROFS; 1096 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1097 "device.\n"); 1098 goto read_super_error; 1099 } 1100 1101 status = ocfs2_check_journals_nolocks(osb); 1102 if (status < 0) { 1103 if (status == -EROFS) 1104 mlog(ML_ERROR, "Recovery required on readonly " 1105 "file system, but write access is " 1106 "unavailable.\n"); 1107 else 1108 mlog_errno(status); 1109 goto read_super_error; 1110 } 1111 1112 ocfs2_set_ro_flag(osb, 1); 1113 1114 printk(KERN_NOTICE "Readonly device detected. No cluster " 1115 "services will be utilized for this mount. Recovery " 1116 "will be skipped.\n"); 1117 } 1118 1119 if (!ocfs2_is_hard_readonly(osb)) { 1120 if (sb->s_flags & MS_RDONLY) 1121 ocfs2_set_ro_flag(osb, 0); 1122 } 1123 1124 status = ocfs2_verify_heartbeat(osb); 1125 if (status < 0) { 1126 mlog_errno(status); 1127 goto read_super_error; 1128 } 1129 1130 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1131 ocfs2_debugfs_root); 1132 if (!osb->osb_debug_root) { 1133 status = -EINVAL; 1134 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1135 goto read_super_error; 1136 } 1137 1138 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1139 osb->osb_debug_root, 1140 osb, 1141 &ocfs2_osb_debug_fops); 1142 if (!osb->osb_ctxt) { 1143 status = -EINVAL; 1144 mlog_errno(status); 1145 goto read_super_error; 1146 } 1147 1148 if (ocfs2_meta_ecc(osb)) { 1149 status = ocfs2_blockcheck_stats_debugfs_install( 1150 &osb->osb_ecc_stats, 1151 osb->osb_debug_root); 1152 if (status) { 1153 mlog(ML_ERROR, 1154 "Unable to create blockcheck statistics " 1155 "files\n"); 1156 goto read_super_error; 1157 } 1158 } 1159 1160 status = ocfs2_mount_volume(sb); 1161 if (osb->root_inode) 1162 inode = igrab(osb->root_inode); 1163 1164 if (status < 0) 1165 goto read_super_error; 1166 1167 if (!inode) { 1168 status = -EIO; 1169 mlog_errno(status); 1170 goto read_super_error; 1171 } 1172 1173 root = d_alloc_root(inode); 1174 if (!root) { 1175 status = -ENOMEM; 1176 mlog_errno(status); 1177 goto read_super_error; 1178 } 1179 1180 sb->s_root = root; 1181 1182 ocfs2_complete_mount_recovery(osb); 1183 1184 if (ocfs2_mount_local(osb)) 1185 snprintf(nodestr, sizeof(nodestr), "local"); 1186 else 1187 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1188 1189 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1190 "with %s data mode.\n", 1191 osb->dev_str, nodestr, osb->slot_num, 1192 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1193 "ordered"); 1194 1195 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1196 wake_up(&osb->osb_mount_event); 1197 1198 /* Now we can initialize quotas because we can afford to wait 1199 * for cluster locks recovery now. That also means that truncation 1200 * log recovery can happen but that waits for proper quota setup */ 1201 if (!(sb->s_flags & MS_RDONLY)) { 1202 status = ocfs2_enable_quotas(osb); 1203 if (status < 0) { 1204 /* We have to err-out specially here because 1205 * s_root is already set */ 1206 mlog_errno(status); 1207 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1208 wake_up(&osb->osb_mount_event); 1209 mlog_exit(status); 1210 return status; 1211 } 1212 } 1213 1214 ocfs2_complete_quota_recovery(osb); 1215 1216 /* Now we wake up again for processes waiting for quotas */ 1217 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1218 wake_up(&osb->osb_mount_event); 1219 1220 /* Start this when the mount is almost sure of being successful */ 1221 ocfs2_orphan_scan_start(osb); 1222 1223 mlog_exit(status); 1224 return status; 1225 1226 read_super_error: 1227 brelse(bh); 1228 1229 if (inode) 1230 iput(inode); 1231 1232 if (osb) { 1233 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1234 wake_up(&osb->osb_mount_event); 1235 ocfs2_dismount_volume(sb, 1); 1236 } 1237 1238 mlog_exit(status); 1239 return status; 1240 } 1241 1242 static int ocfs2_get_sb(struct file_system_type *fs_type, 1243 int flags, 1244 const char *dev_name, 1245 void *data, 1246 struct vfsmount *mnt) 1247 { 1248 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 1249 mnt); 1250 } 1251 1252 static void ocfs2_kill_sb(struct super_block *sb) 1253 { 1254 struct ocfs2_super *osb = OCFS2_SB(sb); 1255 1256 /* Failed mount? */ 1257 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1258 goto out; 1259 1260 /* Prevent further queueing of inode drop events */ 1261 spin_lock(&dentry_list_lock); 1262 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1263 spin_unlock(&dentry_list_lock); 1264 /* Wait for work to finish and/or remove it */ 1265 cancel_work_sync(&osb->dentry_lock_work); 1266 out: 1267 kill_block_super(sb); 1268 } 1269 1270 static struct file_system_type ocfs2_fs_type = { 1271 .owner = THIS_MODULE, 1272 .name = "ocfs2", 1273 .get_sb = ocfs2_get_sb, /* is this called when we mount 1274 * the fs? */ 1275 .kill_sb = ocfs2_kill_sb, 1276 1277 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1278 .next = NULL 1279 }; 1280 1281 static int ocfs2_check_set_options(struct super_block *sb, 1282 struct mount_options *options) 1283 { 1284 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1285 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1286 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1287 mlog(ML_ERROR, "User quotas were requested, but this " 1288 "filesystem does not have the feature enabled.\n"); 1289 return 0; 1290 } 1291 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1292 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1293 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1294 mlog(ML_ERROR, "Group quotas were requested, but this " 1295 "filesystem does not have the feature enabled.\n"); 1296 return 0; 1297 } 1298 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1299 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1300 mlog(ML_ERROR, "ACL support requested but extended attributes " 1301 "feature is not enabled\n"); 1302 return 0; 1303 } 1304 /* No ACL setting specified? Use XATTR feature... */ 1305 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1306 OCFS2_MOUNT_NO_POSIX_ACL))) { 1307 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1308 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1309 else 1310 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1311 } 1312 return 1; 1313 } 1314 1315 static int ocfs2_parse_options(struct super_block *sb, 1316 char *options, 1317 struct mount_options *mopt, 1318 int is_remount) 1319 { 1320 int status; 1321 char *p; 1322 u32 tmp; 1323 1324 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1325 options ? options : "(none)"); 1326 1327 mopt->commit_interval = 0; 1328 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1329 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1330 mopt->slot = OCFS2_INVALID_SLOT; 1331 mopt->localalloc_opt = -1; 1332 mopt->cluster_stack[0] = '\0'; 1333 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1334 mopt->dir_resv_level = -1; 1335 1336 if (!options) { 1337 status = 1; 1338 goto bail; 1339 } 1340 1341 while ((p = strsep(&options, ",")) != NULL) { 1342 int token, option; 1343 substring_t args[MAX_OPT_ARGS]; 1344 1345 if (!*p) 1346 continue; 1347 1348 token = match_token(p, tokens, args); 1349 switch (token) { 1350 case Opt_hb_local: 1351 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1352 break; 1353 case Opt_hb_none: 1354 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1355 break; 1356 case Opt_hb_global: 1357 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1358 break; 1359 case Opt_barrier: 1360 if (match_int(&args[0], &option)) { 1361 status = 0; 1362 goto bail; 1363 } 1364 if (option) 1365 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1366 else 1367 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1368 break; 1369 case Opt_intr: 1370 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1371 break; 1372 case Opt_nointr: 1373 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1374 break; 1375 case Opt_err_panic: 1376 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1377 break; 1378 case Opt_err_ro: 1379 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1380 break; 1381 case Opt_data_ordered: 1382 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1383 break; 1384 case Opt_data_writeback: 1385 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1386 break; 1387 case Opt_user_xattr: 1388 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1389 break; 1390 case Opt_nouser_xattr: 1391 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1392 break; 1393 case Opt_atime_quantum: 1394 if (match_int(&args[0], &option)) { 1395 status = 0; 1396 goto bail; 1397 } 1398 if (option >= 0) 1399 mopt->atime_quantum = option; 1400 break; 1401 case Opt_slot: 1402 option = 0; 1403 if (match_int(&args[0], &option)) { 1404 status = 0; 1405 goto bail; 1406 } 1407 if (option) 1408 mopt->slot = (s16)option; 1409 break; 1410 case Opt_commit: 1411 option = 0; 1412 if (match_int(&args[0], &option)) { 1413 status = 0; 1414 goto bail; 1415 } 1416 if (option < 0) 1417 return 0; 1418 if (option == 0) 1419 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1420 mopt->commit_interval = HZ * option; 1421 break; 1422 case Opt_localalloc: 1423 option = 0; 1424 if (match_int(&args[0], &option)) { 1425 status = 0; 1426 goto bail; 1427 } 1428 if (option >= 0) 1429 mopt->localalloc_opt = option; 1430 break; 1431 case Opt_localflocks: 1432 /* 1433 * Changing this during remount could race 1434 * flock() requests, or "unbalance" existing 1435 * ones (e.g., a lock is taken in one mode but 1436 * dropped in the other). If users care enough 1437 * to flip locking modes during remount, we 1438 * could add a "local" flag to individual 1439 * flock structures for proper tracking of 1440 * state. 1441 */ 1442 if (!is_remount) 1443 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1444 break; 1445 case Opt_stack: 1446 /* Check both that the option we were passed 1447 * is of the right length and that it is a proper 1448 * string of the right length. 1449 */ 1450 if (((args[0].to - args[0].from) != 1451 OCFS2_STACK_LABEL_LEN) || 1452 (strnlen(args[0].from, 1453 OCFS2_STACK_LABEL_LEN) != 1454 OCFS2_STACK_LABEL_LEN)) { 1455 mlog(ML_ERROR, 1456 "Invalid cluster_stack option\n"); 1457 status = 0; 1458 goto bail; 1459 } 1460 memcpy(mopt->cluster_stack, args[0].from, 1461 OCFS2_STACK_LABEL_LEN); 1462 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1463 break; 1464 case Opt_inode64: 1465 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1466 break; 1467 case Opt_usrquota: 1468 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1469 break; 1470 case Opt_grpquota: 1471 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1472 break; 1473 case Opt_coherency_buffered: 1474 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1475 break; 1476 case Opt_coherency_full: 1477 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1478 break; 1479 case Opt_acl: 1480 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1481 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1482 break; 1483 case Opt_noacl: 1484 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1485 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1486 break; 1487 case Opt_resv_level: 1488 if (is_remount) 1489 break; 1490 if (match_int(&args[0], &option)) { 1491 status = 0; 1492 goto bail; 1493 } 1494 if (option >= OCFS2_MIN_RESV_LEVEL && 1495 option < OCFS2_MAX_RESV_LEVEL) 1496 mopt->resv_level = option; 1497 break; 1498 case Opt_dir_resv_level: 1499 if (is_remount) 1500 break; 1501 if (match_int(&args[0], &option)) { 1502 status = 0; 1503 goto bail; 1504 } 1505 if (option >= OCFS2_MIN_RESV_LEVEL && 1506 option < OCFS2_MAX_RESV_LEVEL) 1507 mopt->dir_resv_level = option; 1508 break; 1509 default: 1510 mlog(ML_ERROR, 1511 "Unrecognized mount option \"%s\" " 1512 "or missing value\n", p); 1513 status = 0; 1514 goto bail; 1515 } 1516 } 1517 1518 /* Ensure only one heartbeat mode */ 1519 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 1520 OCFS2_MOUNT_HB_NONE); 1521 if (hweight32(tmp) != 1) { 1522 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1523 status = 0; 1524 goto bail; 1525 } 1526 1527 status = 1; 1528 1529 bail: 1530 mlog_exit(status); 1531 return status; 1532 } 1533 1534 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1535 { 1536 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1537 unsigned long opts = osb->s_mount_opt; 1538 unsigned int local_alloc_megs; 1539 1540 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1541 seq_printf(s, ",_netdev"); 1542 if (opts & OCFS2_MOUNT_HB_LOCAL) 1543 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1544 else 1545 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1546 } else 1547 seq_printf(s, ",%s", OCFS2_HB_NONE); 1548 1549 if (opts & OCFS2_MOUNT_NOINTR) 1550 seq_printf(s, ",nointr"); 1551 1552 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1553 seq_printf(s, ",data=writeback"); 1554 else 1555 seq_printf(s, ",data=ordered"); 1556 1557 if (opts & OCFS2_MOUNT_BARRIER) 1558 seq_printf(s, ",barrier=1"); 1559 1560 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1561 seq_printf(s, ",errors=panic"); 1562 else 1563 seq_printf(s, ",errors=remount-ro"); 1564 1565 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1566 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1567 1568 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1569 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1570 1571 if (osb->osb_commit_interval) 1572 seq_printf(s, ",commit=%u", 1573 (unsigned) (osb->osb_commit_interval / HZ)); 1574 1575 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1576 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1577 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1578 1579 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1580 seq_printf(s, ",localflocks,"); 1581 1582 if (osb->osb_cluster_stack[0]) 1583 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1584 osb->osb_cluster_stack); 1585 if (opts & OCFS2_MOUNT_USRQUOTA) 1586 seq_printf(s, ",usrquota"); 1587 if (opts & OCFS2_MOUNT_GRPQUOTA) 1588 seq_printf(s, ",grpquota"); 1589 1590 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1591 seq_printf(s, ",coherency=buffered"); 1592 else 1593 seq_printf(s, ",coherency=full"); 1594 1595 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1596 seq_printf(s, ",nouser_xattr"); 1597 else 1598 seq_printf(s, ",user_xattr"); 1599 1600 if (opts & OCFS2_MOUNT_INODE64) 1601 seq_printf(s, ",inode64"); 1602 1603 if (opts & OCFS2_MOUNT_POSIX_ACL) 1604 seq_printf(s, ",acl"); 1605 else 1606 seq_printf(s, ",noacl"); 1607 1608 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1609 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1610 1611 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1612 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1613 1614 return 0; 1615 } 1616 1617 static int __init ocfs2_init(void) 1618 { 1619 int status; 1620 1621 mlog_entry_void(); 1622 1623 ocfs2_print_version(); 1624 1625 status = init_ocfs2_uptodate_cache(); 1626 if (status < 0) { 1627 mlog_errno(status); 1628 goto leave; 1629 } 1630 1631 status = ocfs2_initialize_mem_caches(); 1632 if (status < 0) { 1633 mlog_errno(status); 1634 goto leave; 1635 } 1636 1637 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1638 if (!ocfs2_wq) { 1639 status = -ENOMEM; 1640 goto leave; 1641 } 1642 1643 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1644 if (!ocfs2_debugfs_root) { 1645 status = -EFAULT; 1646 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1647 } 1648 1649 status = ocfs2_quota_setup(); 1650 if (status) 1651 goto leave; 1652 1653 ocfs2_set_locking_protocol(); 1654 1655 status = register_quota_format(&ocfs2_quota_format); 1656 leave: 1657 if (status < 0) { 1658 ocfs2_quota_shutdown(); 1659 ocfs2_free_mem_caches(); 1660 exit_ocfs2_uptodate_cache(); 1661 } 1662 1663 mlog_exit(status); 1664 1665 if (status >= 0) { 1666 return register_filesystem(&ocfs2_fs_type); 1667 } else 1668 return -1; 1669 } 1670 1671 static void __exit ocfs2_exit(void) 1672 { 1673 mlog_entry_void(); 1674 1675 ocfs2_quota_shutdown(); 1676 1677 if (ocfs2_wq) { 1678 flush_workqueue(ocfs2_wq); 1679 destroy_workqueue(ocfs2_wq); 1680 } 1681 1682 unregister_quota_format(&ocfs2_quota_format); 1683 1684 debugfs_remove(ocfs2_debugfs_root); 1685 1686 ocfs2_free_mem_caches(); 1687 1688 unregister_filesystem(&ocfs2_fs_type); 1689 1690 exit_ocfs2_uptodate_cache(); 1691 1692 mlog_exit_void(); 1693 } 1694 1695 static void ocfs2_put_super(struct super_block *sb) 1696 { 1697 mlog_entry("(0x%p)\n", sb); 1698 1699 lock_kernel(); 1700 1701 ocfs2_sync_blockdev(sb); 1702 ocfs2_dismount_volume(sb, 0); 1703 1704 unlock_kernel(); 1705 1706 mlog_exit_void(); 1707 } 1708 1709 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1710 { 1711 struct ocfs2_super *osb; 1712 u32 numbits, freebits; 1713 int status; 1714 struct ocfs2_dinode *bm_lock; 1715 struct buffer_head *bh = NULL; 1716 struct inode *inode = NULL; 1717 1718 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1719 1720 osb = OCFS2_SB(dentry->d_sb); 1721 1722 inode = ocfs2_get_system_file_inode(osb, 1723 GLOBAL_BITMAP_SYSTEM_INODE, 1724 OCFS2_INVALID_SLOT); 1725 if (!inode) { 1726 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1727 status = -EIO; 1728 goto bail; 1729 } 1730 1731 status = ocfs2_inode_lock(inode, &bh, 0); 1732 if (status < 0) { 1733 mlog_errno(status); 1734 goto bail; 1735 } 1736 1737 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1738 1739 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1740 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1741 1742 buf->f_type = OCFS2_SUPER_MAGIC; 1743 buf->f_bsize = dentry->d_sb->s_blocksize; 1744 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1745 buf->f_blocks = ((sector_t) numbits) * 1746 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1747 buf->f_bfree = ((sector_t) freebits) * 1748 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1749 buf->f_bavail = buf->f_bfree; 1750 buf->f_files = numbits; 1751 buf->f_ffree = freebits; 1752 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1753 & 0xFFFFFFFFUL; 1754 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1755 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1756 1757 brelse(bh); 1758 1759 ocfs2_inode_unlock(inode, 0); 1760 status = 0; 1761 bail: 1762 if (inode) 1763 iput(inode); 1764 1765 mlog_exit(status); 1766 1767 return status; 1768 } 1769 1770 static void ocfs2_inode_init_once(void *data) 1771 { 1772 struct ocfs2_inode_info *oi = data; 1773 1774 oi->ip_flags = 0; 1775 oi->ip_open_count = 0; 1776 spin_lock_init(&oi->ip_lock); 1777 ocfs2_extent_map_init(&oi->vfs_inode); 1778 INIT_LIST_HEAD(&oi->ip_io_markers); 1779 oi->ip_dir_start_lookup = 0; 1780 1781 init_rwsem(&oi->ip_alloc_sem); 1782 init_rwsem(&oi->ip_xattr_sem); 1783 mutex_init(&oi->ip_io_mutex); 1784 1785 oi->ip_blkno = 0ULL; 1786 oi->ip_clusters = 0; 1787 1788 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1789 1790 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1791 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1792 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1793 1794 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1795 &ocfs2_inode_caching_ops); 1796 1797 inode_init_once(&oi->vfs_inode); 1798 } 1799 1800 static int ocfs2_initialize_mem_caches(void) 1801 { 1802 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1803 sizeof(struct ocfs2_inode_info), 1804 0, 1805 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1806 SLAB_MEM_SPREAD), 1807 ocfs2_inode_init_once); 1808 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1809 sizeof(struct ocfs2_dquot), 1810 0, 1811 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1812 SLAB_MEM_SPREAD), 1813 NULL); 1814 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1815 sizeof(struct ocfs2_quota_chunk), 1816 0, 1817 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1818 NULL); 1819 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1820 !ocfs2_qf_chunk_cachep) { 1821 if (ocfs2_inode_cachep) 1822 kmem_cache_destroy(ocfs2_inode_cachep); 1823 if (ocfs2_dquot_cachep) 1824 kmem_cache_destroy(ocfs2_dquot_cachep); 1825 if (ocfs2_qf_chunk_cachep) 1826 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1827 return -ENOMEM; 1828 } 1829 1830 return 0; 1831 } 1832 1833 static void ocfs2_free_mem_caches(void) 1834 { 1835 if (ocfs2_inode_cachep) 1836 kmem_cache_destroy(ocfs2_inode_cachep); 1837 ocfs2_inode_cachep = NULL; 1838 1839 if (ocfs2_dquot_cachep) 1840 kmem_cache_destroy(ocfs2_dquot_cachep); 1841 ocfs2_dquot_cachep = NULL; 1842 1843 if (ocfs2_qf_chunk_cachep) 1844 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1845 ocfs2_qf_chunk_cachep = NULL; 1846 } 1847 1848 static int ocfs2_get_sector(struct super_block *sb, 1849 struct buffer_head **bh, 1850 int block, 1851 int sect_size) 1852 { 1853 if (!sb_set_blocksize(sb, sect_size)) { 1854 mlog(ML_ERROR, "unable to set blocksize\n"); 1855 return -EIO; 1856 } 1857 1858 *bh = sb_getblk(sb, block); 1859 if (!*bh) { 1860 mlog_errno(-EIO); 1861 return -EIO; 1862 } 1863 lock_buffer(*bh); 1864 if (!buffer_dirty(*bh)) 1865 clear_buffer_uptodate(*bh); 1866 unlock_buffer(*bh); 1867 ll_rw_block(READ, 1, bh); 1868 wait_on_buffer(*bh); 1869 if (!buffer_uptodate(*bh)) { 1870 mlog_errno(-EIO); 1871 brelse(*bh); 1872 *bh = NULL; 1873 return -EIO; 1874 } 1875 1876 return 0; 1877 } 1878 1879 static int ocfs2_mount_volume(struct super_block *sb) 1880 { 1881 int status = 0; 1882 int unlock_super = 0; 1883 struct ocfs2_super *osb = OCFS2_SB(sb); 1884 1885 mlog_entry_void(); 1886 1887 if (ocfs2_is_hard_readonly(osb)) 1888 goto leave; 1889 1890 status = ocfs2_dlm_init(osb); 1891 if (status < 0) { 1892 mlog_errno(status); 1893 goto leave; 1894 } 1895 1896 status = ocfs2_super_lock(osb, 1); 1897 if (status < 0) { 1898 mlog_errno(status); 1899 goto leave; 1900 } 1901 unlock_super = 1; 1902 1903 /* This will load up the node map and add ourselves to it. */ 1904 status = ocfs2_find_slot(osb); 1905 if (status < 0) { 1906 mlog_errno(status); 1907 goto leave; 1908 } 1909 1910 /* load all node-local system inodes */ 1911 status = ocfs2_init_local_system_inodes(osb); 1912 if (status < 0) { 1913 mlog_errno(status); 1914 goto leave; 1915 } 1916 1917 status = ocfs2_check_volume(osb); 1918 if (status < 0) { 1919 mlog_errno(status); 1920 goto leave; 1921 } 1922 1923 status = ocfs2_truncate_log_init(osb); 1924 if (status < 0) 1925 mlog_errno(status); 1926 1927 leave: 1928 if (unlock_super) 1929 ocfs2_super_unlock(osb, 1); 1930 1931 mlog_exit(status); 1932 return status; 1933 } 1934 1935 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1936 { 1937 int tmp, hangup_needed = 0; 1938 struct ocfs2_super *osb = NULL; 1939 char nodestr[8]; 1940 1941 mlog_entry("(0x%p)\n", sb); 1942 1943 BUG_ON(!sb); 1944 osb = OCFS2_SB(sb); 1945 BUG_ON(!osb); 1946 1947 debugfs_remove(osb->osb_ctxt); 1948 1949 /* 1950 * Flush inode dropping work queue so that deletes are 1951 * performed while the filesystem is still working 1952 */ 1953 ocfs2_drop_all_dl_inodes(osb); 1954 1955 /* Orphan scan should be stopped as early as possible */ 1956 ocfs2_orphan_scan_stop(osb); 1957 1958 ocfs2_disable_quotas(osb); 1959 1960 ocfs2_shutdown_local_alloc(osb); 1961 1962 ocfs2_truncate_log_shutdown(osb); 1963 1964 /* This will disable recovery and flush any recovery work. */ 1965 ocfs2_recovery_exit(osb); 1966 1967 ocfs2_journal_shutdown(osb); 1968 1969 ocfs2_sync_blockdev(sb); 1970 1971 ocfs2_purge_refcount_trees(osb); 1972 1973 /* No cluster connection means we've failed during mount, so skip 1974 * all the steps which depended on that to complete. */ 1975 if (osb->cconn) { 1976 tmp = ocfs2_super_lock(osb, 1); 1977 if (tmp < 0) { 1978 mlog_errno(tmp); 1979 return; 1980 } 1981 } 1982 1983 if (osb->slot_num != OCFS2_INVALID_SLOT) 1984 ocfs2_put_slot(osb); 1985 1986 if (osb->cconn) 1987 ocfs2_super_unlock(osb, 1); 1988 1989 ocfs2_release_system_inodes(osb); 1990 1991 /* 1992 * If we're dismounting due to mount error, mount.ocfs2 will clean 1993 * up heartbeat. If we're a local mount, there is no heartbeat. 1994 * If we failed before we got a uuid_str yet, we can't stop 1995 * heartbeat. Otherwise, do it. 1996 */ 1997 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1998 hangup_needed = 1; 1999 2000 if (osb->cconn) 2001 ocfs2_dlm_shutdown(osb, hangup_needed); 2002 2003 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 2004 debugfs_remove(osb->osb_debug_root); 2005 2006 if (hangup_needed) 2007 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 2008 2009 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 2010 2011 if (ocfs2_mount_local(osb)) 2012 snprintf(nodestr, sizeof(nodestr), "local"); 2013 else 2014 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 2015 2016 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 2017 osb->dev_str, nodestr); 2018 2019 ocfs2_delete_osb(osb); 2020 kfree(osb); 2021 sb->s_dev = 0; 2022 sb->s_fs_info = NULL; 2023 } 2024 2025 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2026 unsigned uuid_bytes) 2027 { 2028 int i, ret; 2029 char *ptr; 2030 2031 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2032 2033 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2034 if (osb->uuid_str == NULL) 2035 return -ENOMEM; 2036 2037 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2038 /* print with null */ 2039 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2040 if (ret != 2) /* drop super cleans up */ 2041 return -EINVAL; 2042 /* then only advance past the last char */ 2043 ptr += 2; 2044 } 2045 2046 return 0; 2047 } 2048 2049 /* Make sure entire volume is addressable by our journal. Requires 2050 osb_clusters_at_boot to be valid and for the journal to have been 2051 initialized by ocfs2_journal_init(). */ 2052 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2053 { 2054 int status = 0; 2055 u64 max_block = 2056 ocfs2_clusters_to_blocks(osb->sb, 2057 osb->osb_clusters_at_boot) - 1; 2058 2059 /* 32-bit block number is always OK. */ 2060 if (max_block <= (u32)~0ULL) 2061 goto out; 2062 2063 /* Volume is "huge", so see if our journal is new enough to 2064 support it. */ 2065 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2066 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2067 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2068 JBD2_FEATURE_INCOMPAT_64BIT))) { 2069 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2070 "Enable the 'block64' journal option with tunefs.ocfs2"); 2071 status = -EFBIG; 2072 goto out; 2073 } 2074 2075 out: 2076 return status; 2077 } 2078 2079 static int ocfs2_initialize_super(struct super_block *sb, 2080 struct buffer_head *bh, 2081 int sector_size, 2082 struct ocfs2_blockcheck_stats *stats) 2083 { 2084 int status; 2085 int i, cbits, bbits; 2086 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2087 struct inode *inode = NULL; 2088 struct ocfs2_journal *journal; 2089 __le32 uuid_net_key; 2090 struct ocfs2_super *osb; 2091 u64 total_blocks; 2092 2093 mlog_entry_void(); 2094 2095 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2096 if (!osb) { 2097 status = -ENOMEM; 2098 mlog_errno(status); 2099 goto bail; 2100 } 2101 2102 sb->s_fs_info = osb; 2103 sb->s_op = &ocfs2_sops; 2104 sb->s_export_op = &ocfs2_export_ops; 2105 sb->s_qcop = &ocfs2_quotactl_ops; 2106 sb->dq_op = &ocfs2_quota_operations; 2107 sb->s_xattr = ocfs2_xattr_handlers; 2108 sb->s_time_gran = 1; 2109 sb->s_flags |= MS_NOATIME; 2110 /* this is needed to support O_LARGEFILE */ 2111 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2112 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2113 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2114 2115 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2116 2117 for (i = 0; i < 3; i++) 2118 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2119 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2120 2121 osb->sb = sb; 2122 /* Save off for ocfs2_rw_direct */ 2123 osb->s_sectsize_bits = blksize_bits(sector_size); 2124 BUG_ON(!osb->s_sectsize_bits); 2125 2126 spin_lock_init(&osb->dc_task_lock); 2127 init_waitqueue_head(&osb->dc_event); 2128 osb->dc_work_sequence = 0; 2129 osb->dc_wake_sequence = 0; 2130 INIT_LIST_HEAD(&osb->blocked_lock_list); 2131 osb->blocked_lock_count = 0; 2132 spin_lock_init(&osb->osb_lock); 2133 spin_lock_init(&osb->osb_xattr_lock); 2134 ocfs2_init_steal_slots(osb); 2135 2136 atomic_set(&osb->alloc_stats.moves, 0); 2137 atomic_set(&osb->alloc_stats.local_data, 0); 2138 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2139 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2140 atomic_set(&osb->alloc_stats.bg_extends, 0); 2141 2142 /* Copy the blockcheck stats from the superblock probe */ 2143 osb->osb_ecc_stats = *stats; 2144 2145 ocfs2_init_node_maps(osb); 2146 2147 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2148 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2149 2150 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2151 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2152 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2153 osb->max_slots); 2154 status = -EINVAL; 2155 goto bail; 2156 } 2157 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 2158 2159 ocfs2_orphan_scan_init(osb); 2160 2161 status = ocfs2_recovery_init(osb); 2162 if (status) { 2163 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2164 mlog_errno(status); 2165 goto bail; 2166 } 2167 2168 init_waitqueue_head(&osb->checkpoint_event); 2169 atomic_set(&osb->needs_checkpoint, 0); 2170 2171 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2172 2173 osb->slot_num = OCFS2_INVALID_SLOT; 2174 2175 osb->s_xattr_inline_size = le16_to_cpu( 2176 di->id2.i_super.s_xattr_inline_size); 2177 2178 osb->local_alloc_state = OCFS2_LA_UNUSED; 2179 osb->local_alloc_bh = NULL; 2180 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2181 2182 init_waitqueue_head(&osb->osb_mount_event); 2183 2184 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2185 if (status) { 2186 mlog_errno(status); 2187 goto bail; 2188 } 2189 2190 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2191 if (!osb->vol_label) { 2192 mlog(ML_ERROR, "unable to alloc vol label\n"); 2193 status = -ENOMEM; 2194 goto bail; 2195 } 2196 2197 osb->slot_recovery_generations = 2198 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2199 GFP_KERNEL); 2200 if (!osb->slot_recovery_generations) { 2201 status = -ENOMEM; 2202 mlog_errno(status); 2203 goto bail; 2204 } 2205 2206 init_waitqueue_head(&osb->osb_wipe_event); 2207 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2208 sizeof(*osb->osb_orphan_wipes), 2209 GFP_KERNEL); 2210 if (!osb->osb_orphan_wipes) { 2211 status = -ENOMEM; 2212 mlog_errno(status); 2213 goto bail; 2214 } 2215 2216 osb->osb_rf_lock_tree = RB_ROOT; 2217 2218 osb->s_feature_compat = 2219 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2220 osb->s_feature_ro_compat = 2221 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2222 osb->s_feature_incompat = 2223 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2224 2225 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2226 mlog(ML_ERROR, "couldn't mount because of unsupported " 2227 "optional features (%x).\n", i); 2228 status = -EINVAL; 2229 goto bail; 2230 } 2231 if (!(osb->sb->s_flags & MS_RDONLY) && 2232 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2233 mlog(ML_ERROR, "couldn't mount RDWR because of " 2234 "unsupported optional features (%x).\n", i); 2235 status = -EINVAL; 2236 goto bail; 2237 } 2238 2239 if (ocfs2_clusterinfo_valid(osb)) { 2240 osb->osb_stackflags = 2241 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2242 memcpy(osb->osb_cluster_stack, 2243 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2244 OCFS2_STACK_LABEL_LEN); 2245 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2246 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2247 mlog(ML_ERROR, 2248 "couldn't mount because of an invalid " 2249 "cluster stack label (%s) \n", 2250 osb->osb_cluster_stack); 2251 status = -EINVAL; 2252 goto bail; 2253 } 2254 } else { 2255 /* The empty string is identical with classic tools that 2256 * don't know about s_cluster_info. */ 2257 osb->osb_cluster_stack[0] = '\0'; 2258 } 2259 2260 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2261 2262 /* FIXME 2263 * This should be done in ocfs2_journal_init(), but unknown 2264 * ordering issues will cause the filesystem to crash. 2265 * If anyone wants to figure out what part of the code 2266 * refers to osb->journal before ocfs2_journal_init() is run, 2267 * be my guest. 2268 */ 2269 /* initialize our journal structure */ 2270 2271 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2272 if (!journal) { 2273 mlog(ML_ERROR, "unable to alloc journal\n"); 2274 status = -ENOMEM; 2275 goto bail; 2276 } 2277 osb->journal = journal; 2278 journal->j_osb = osb; 2279 2280 atomic_set(&journal->j_num_trans, 0); 2281 init_rwsem(&journal->j_trans_barrier); 2282 init_waitqueue_head(&journal->j_checkpointed); 2283 spin_lock_init(&journal->j_lock); 2284 journal->j_trans_id = (unsigned long) 1; 2285 INIT_LIST_HEAD(&journal->j_la_cleanups); 2286 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2287 journal->j_state = OCFS2_JOURNAL_FREE; 2288 2289 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2290 osb->dentry_lock_list = NULL; 2291 2292 /* get some pseudo constants for clustersize bits */ 2293 osb->s_clustersize_bits = 2294 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2295 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2296 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 2297 2298 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2299 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2300 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2301 osb->s_clustersize); 2302 status = -EINVAL; 2303 goto bail; 2304 } 2305 2306 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2307 le32_to_cpu(di->i_clusters)); 2308 2309 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2310 total_blocks); 2311 if (status) { 2312 mlog(ML_ERROR, "Volume too large " 2313 "to mount safely on this system"); 2314 status = -EFBIG; 2315 goto bail; 2316 } 2317 2318 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2319 sizeof(di->id2.i_super.s_uuid))) { 2320 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2321 status = -ENOMEM; 2322 goto bail; 2323 } 2324 2325 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2326 2327 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2328 osb->vol_label[63] = '\0'; 2329 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2330 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2331 osb->first_cluster_group_blkno = 2332 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2333 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2334 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2335 mlog(0, "vol_label: %s\n", osb->vol_label); 2336 mlog(0, "uuid: %s\n", osb->uuid_str); 2337 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 2338 (unsigned long long)osb->root_blkno, 2339 (unsigned long long)osb->system_dir_blkno); 2340 2341 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2342 if (!osb->osb_dlm_debug) { 2343 status = -ENOMEM; 2344 mlog_errno(status); 2345 goto bail; 2346 } 2347 2348 atomic_set(&osb->vol_state, VOLUME_INIT); 2349 2350 /* load root, system_dir, and all global system inodes */ 2351 status = ocfs2_init_global_system_inodes(osb); 2352 if (status < 0) { 2353 mlog_errno(status); 2354 goto bail; 2355 } 2356 2357 /* 2358 * global bitmap 2359 */ 2360 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2361 OCFS2_INVALID_SLOT); 2362 if (!inode) { 2363 status = -EINVAL; 2364 mlog_errno(status); 2365 goto bail; 2366 } 2367 2368 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2369 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2370 iput(inode); 2371 2372 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2373 osb->s_feature_incompat) * 8; 2374 2375 status = ocfs2_init_slot_info(osb); 2376 if (status < 0) { 2377 mlog_errno(status); 2378 goto bail; 2379 } 2380 2381 bail: 2382 mlog_exit(status); 2383 return status; 2384 } 2385 2386 /* 2387 * will return: -EAGAIN if it is ok to keep searching for superblocks 2388 * -EINVAL if there is a bad superblock 2389 * 0 on success 2390 */ 2391 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2392 struct buffer_head *bh, 2393 u32 blksz, 2394 struct ocfs2_blockcheck_stats *stats) 2395 { 2396 int status = -EAGAIN; 2397 2398 mlog_entry_void(); 2399 2400 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2401 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2402 /* We have to do a raw check of the feature here */ 2403 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2404 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2405 status = ocfs2_block_check_validate(bh->b_data, 2406 bh->b_size, 2407 &di->i_check, 2408 stats); 2409 if (status) 2410 goto out; 2411 } 2412 status = -EINVAL; 2413 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2414 mlog(ML_ERROR, "found superblock with incorrect block " 2415 "size: found %u, should be %u\n", 2416 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2417 blksz); 2418 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2419 OCFS2_MAJOR_REV_LEVEL || 2420 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2421 OCFS2_MINOR_REV_LEVEL) { 2422 mlog(ML_ERROR, "found superblock with bad version: " 2423 "found %u.%u, should be %u.%u\n", 2424 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2425 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2426 OCFS2_MAJOR_REV_LEVEL, 2427 OCFS2_MINOR_REV_LEVEL); 2428 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2429 mlog(ML_ERROR, "bad block number on superblock: " 2430 "found %llu, should be %llu\n", 2431 (unsigned long long)le64_to_cpu(di->i_blkno), 2432 (unsigned long long)bh->b_blocknr); 2433 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2434 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2435 mlog(ML_ERROR, "bad cluster size found: %u\n", 2436 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2437 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2438 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2439 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2440 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2441 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2442 mlog(ML_ERROR, 2443 "Superblock slots found greater than file system " 2444 "maximum: found %u, max %u\n", 2445 le16_to_cpu(di->id2.i_super.s_max_slots), 2446 OCFS2_MAX_SLOTS); 2447 } else { 2448 /* found it! */ 2449 status = 0; 2450 } 2451 } 2452 2453 out: 2454 mlog_exit(status); 2455 return status; 2456 } 2457 2458 static int ocfs2_check_volume(struct ocfs2_super *osb) 2459 { 2460 int status; 2461 int dirty; 2462 int local; 2463 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2464 * recover 2465 * ourselves. */ 2466 2467 mlog_entry_void(); 2468 2469 /* Init our journal object. */ 2470 status = ocfs2_journal_init(osb->journal, &dirty); 2471 if (status < 0) { 2472 mlog(ML_ERROR, "Could not initialize journal!\n"); 2473 goto finally; 2474 } 2475 2476 /* Now that journal has been initialized, check to make sure 2477 entire volume is addressable. */ 2478 status = ocfs2_journal_addressable(osb); 2479 if (status) 2480 goto finally; 2481 2482 /* If the journal was unmounted cleanly then we don't want to 2483 * recover anything. Otherwise, journal_load will do that 2484 * dirty work for us :) */ 2485 if (!dirty) { 2486 status = ocfs2_journal_wipe(osb->journal, 0); 2487 if (status < 0) { 2488 mlog_errno(status); 2489 goto finally; 2490 } 2491 } else { 2492 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2493 "recovering volume.\n"); 2494 } 2495 2496 local = ocfs2_mount_local(osb); 2497 2498 /* will play back anything left in the journal. */ 2499 status = ocfs2_journal_load(osb->journal, local, dirty); 2500 if (status < 0) { 2501 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2502 goto finally; 2503 } 2504 2505 if (dirty) { 2506 /* recover my local alloc if we didn't unmount cleanly. */ 2507 status = ocfs2_begin_local_alloc_recovery(osb, 2508 osb->slot_num, 2509 &local_alloc); 2510 if (status < 0) { 2511 mlog_errno(status); 2512 goto finally; 2513 } 2514 /* we complete the recovery process after we've marked 2515 * ourselves as mounted. */ 2516 } 2517 2518 mlog(0, "Journal loaded.\n"); 2519 2520 status = ocfs2_load_local_alloc(osb); 2521 if (status < 0) { 2522 mlog_errno(status); 2523 goto finally; 2524 } 2525 2526 if (dirty) { 2527 /* Recovery will be completed after we've mounted the 2528 * rest of the volume. */ 2529 osb->dirty = 1; 2530 osb->local_alloc_copy = local_alloc; 2531 local_alloc = NULL; 2532 } 2533 2534 /* go through each journal, trylock it and if you get the 2535 * lock, and it's marked as dirty, set the bit in the recover 2536 * map and launch a recovery thread for it. */ 2537 status = ocfs2_mark_dead_nodes(osb); 2538 if (status < 0) { 2539 mlog_errno(status); 2540 goto finally; 2541 } 2542 2543 status = ocfs2_compute_replay_slots(osb); 2544 if (status < 0) 2545 mlog_errno(status); 2546 2547 finally: 2548 if (local_alloc) 2549 kfree(local_alloc); 2550 2551 mlog_exit(status); 2552 return status; 2553 } 2554 2555 /* 2556 * The routine gets called from dismount or close whenever a dismount on 2557 * volume is requested and the osb open count becomes 1. 2558 * It will remove the osb from the global list and also free up all the 2559 * initialized resources and fileobject. 2560 */ 2561 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2562 { 2563 mlog_entry_void(); 2564 2565 /* This function assumes that the caller has the main osb resource */ 2566 2567 ocfs2_free_slot_info(osb); 2568 2569 kfree(osb->osb_orphan_wipes); 2570 kfree(osb->slot_recovery_generations); 2571 /* FIXME 2572 * This belongs in journal shutdown, but because we have to 2573 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2574 * we free it here. 2575 */ 2576 kfree(osb->journal); 2577 if (osb->local_alloc_copy) 2578 kfree(osb->local_alloc_copy); 2579 kfree(osb->uuid_str); 2580 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2581 memset(osb, 0, sizeof(struct ocfs2_super)); 2582 2583 mlog_exit_void(); 2584 } 2585 2586 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2587 * panic(). We do not support continue-on-error operation. */ 2588 static void ocfs2_handle_error(struct super_block *sb) 2589 { 2590 struct ocfs2_super *osb = OCFS2_SB(sb); 2591 2592 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2593 panic("OCFS2: (device %s): panic forced after error\n", 2594 sb->s_id); 2595 2596 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2597 2598 if (sb->s_flags & MS_RDONLY && 2599 (ocfs2_is_soft_readonly(osb) || 2600 ocfs2_is_hard_readonly(osb))) 2601 return; 2602 2603 printk(KERN_CRIT "File system is now read-only due to the potential " 2604 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2605 "system is unmounted.\n"); 2606 sb->s_flags |= MS_RDONLY; 2607 ocfs2_set_ro_flag(osb, 0); 2608 } 2609 2610 static char error_buf[1024]; 2611 2612 void __ocfs2_error(struct super_block *sb, 2613 const char *function, 2614 const char *fmt, ...) 2615 { 2616 va_list args; 2617 2618 va_start(args, fmt); 2619 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2620 va_end(args); 2621 2622 /* Not using mlog here because we want to show the actual 2623 * function the error came from. */ 2624 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2625 sb->s_id, function, error_buf); 2626 2627 ocfs2_handle_error(sb); 2628 } 2629 2630 /* Handle critical errors. This is intentionally more drastic than 2631 * ocfs2_handle_error, so we only use for things like journal errors, 2632 * etc. */ 2633 void __ocfs2_abort(struct super_block* sb, 2634 const char *function, 2635 const char *fmt, ...) 2636 { 2637 va_list args; 2638 2639 va_start(args, fmt); 2640 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2641 va_end(args); 2642 2643 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2644 sb->s_id, function, error_buf); 2645 2646 /* We don't have the cluster support yet to go straight to 2647 * hard readonly in here. Until then, we want to keep 2648 * ocfs2_abort() so that we can at least mark critical 2649 * errors. 2650 * 2651 * TODO: This should abort the journal and alert other nodes 2652 * that our slot needs recovery. */ 2653 2654 /* Force a panic(). This stinks, but it's better than letting 2655 * things continue without having a proper hard readonly 2656 * here. */ 2657 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2658 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2659 ocfs2_handle_error(sb); 2660 } 2661 2662 /* 2663 * Void signal blockers, because in-kernel sigprocmask() only fails 2664 * when SIG_* is wrong. 2665 */ 2666 void ocfs2_block_signals(sigset_t *oldset) 2667 { 2668 int rc; 2669 sigset_t blocked; 2670 2671 sigfillset(&blocked); 2672 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2673 BUG_ON(rc); 2674 } 2675 2676 void ocfs2_unblock_signals(sigset_t *oldset) 2677 { 2678 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2679 BUG_ON(rc); 2680 } 2681 2682 module_init(ocfs2_init); 2683 module_exit(ocfs2_exit); 2684