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 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 634 !ocfs2_check_set_options(sb, &parsed_options)) { 635 ret = -EINVAL; 636 goto out; 637 } 638 639 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 640 OCFS2_MOUNT_HB_NONE; 641 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 642 ret = -EINVAL; 643 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 644 goto out; 645 } 646 647 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 648 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 649 ret = -EINVAL; 650 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 651 goto out; 652 } 653 654 /* Probably don't want this on remount; it might 655 * mess with other nodes */ 656 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 657 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 658 ret = -EINVAL; 659 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 660 goto out; 661 } 662 663 /* We're going to/from readonly mode. */ 664 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 665 /* Disable quota accounting before remounting RO */ 666 if (*flags & MS_RDONLY) { 667 ret = ocfs2_susp_quotas(osb, 0); 668 if (ret < 0) 669 goto out; 670 } 671 /* Lock here so the check of HARD_RO and the potential 672 * setting of SOFT_RO is atomic. */ 673 spin_lock(&osb->osb_lock); 674 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 675 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 676 ret = -EROFS; 677 goto unlock_osb; 678 } 679 680 if (*flags & MS_RDONLY) { 681 mlog(0, "Going to ro mode.\n"); 682 sb->s_flags |= MS_RDONLY; 683 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 684 } else { 685 mlog(0, "Making ro filesystem writeable.\n"); 686 687 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 688 mlog(ML_ERROR, "Cannot remount RDWR " 689 "filesystem due to previous errors.\n"); 690 ret = -EROFS; 691 goto unlock_osb; 692 } 693 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 694 if (incompat_features) { 695 mlog(ML_ERROR, "Cannot remount RDWR because " 696 "of unsupported optional features " 697 "(%x).\n", incompat_features); 698 ret = -EINVAL; 699 goto unlock_osb; 700 } 701 sb->s_flags &= ~MS_RDONLY; 702 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 703 } 704 unlock_osb: 705 spin_unlock(&osb->osb_lock); 706 /* Enable quota accounting after remounting RW */ 707 if (!ret && !(*flags & MS_RDONLY)) { 708 if (sb_any_quota_suspended(sb)) 709 ret = ocfs2_susp_quotas(osb, 1); 710 else 711 ret = ocfs2_enable_quotas(osb); 712 if (ret < 0) { 713 /* Return back changes... */ 714 spin_lock(&osb->osb_lock); 715 sb->s_flags |= MS_RDONLY; 716 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 717 spin_unlock(&osb->osb_lock); 718 goto out; 719 } 720 } 721 } 722 723 if (!ret) { 724 /* Only save off the new mount options in case of a successful 725 * remount. */ 726 osb->s_mount_opt = parsed_options.mount_opt; 727 osb->s_atime_quantum = parsed_options.atime_quantum; 728 osb->preferred_slot = parsed_options.slot; 729 if (parsed_options.commit_interval) 730 osb->osb_commit_interval = parsed_options.commit_interval; 731 732 if (!ocfs2_is_hard_readonly(osb)) 733 ocfs2_set_journal_params(osb); 734 735 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 736 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 737 MS_POSIXACL : 0); 738 } 739 out: 740 return ret; 741 } 742 743 static int ocfs2_sb_probe(struct super_block *sb, 744 struct buffer_head **bh, 745 int *sector_size, 746 struct ocfs2_blockcheck_stats *stats) 747 { 748 int status, tmpstat; 749 struct ocfs1_vol_disk_hdr *hdr; 750 struct ocfs2_dinode *di; 751 int blksize; 752 753 *bh = NULL; 754 755 /* may be > 512 */ 756 *sector_size = bdev_logical_block_size(sb->s_bdev); 757 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 758 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 759 *sector_size, OCFS2_MAX_BLOCKSIZE); 760 status = -EINVAL; 761 goto bail; 762 } 763 764 /* Can this really happen? */ 765 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 766 *sector_size = OCFS2_MIN_BLOCKSIZE; 767 768 /* check block zero for old format */ 769 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 770 if (status < 0) { 771 mlog_errno(status); 772 goto bail; 773 } 774 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 775 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 776 mlog(ML_ERROR, "incompatible version: %u.%u\n", 777 hdr->major_version, hdr->minor_version); 778 status = -EINVAL; 779 } 780 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 781 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 782 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 783 hdr->signature); 784 status = -EINVAL; 785 } 786 brelse(*bh); 787 *bh = NULL; 788 if (status < 0) { 789 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 790 "upgraded before mounting with ocfs v2\n"); 791 goto bail; 792 } 793 794 /* 795 * Now check at magic offset for 512, 1024, 2048, 4096 796 * blocksizes. 4096 is the maximum blocksize because it is 797 * the minimum clustersize. 798 */ 799 status = -EINVAL; 800 for (blksize = *sector_size; 801 blksize <= OCFS2_MAX_BLOCKSIZE; 802 blksize <<= 1) { 803 tmpstat = ocfs2_get_sector(sb, bh, 804 OCFS2_SUPER_BLOCK_BLKNO, 805 blksize); 806 if (tmpstat < 0) { 807 status = tmpstat; 808 mlog_errno(status); 809 break; 810 } 811 di = (struct ocfs2_dinode *) (*bh)->b_data; 812 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 813 spin_lock_init(&stats->b_lock); 814 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 815 if (tmpstat < 0) { 816 brelse(*bh); 817 *bh = NULL; 818 } 819 if (tmpstat != -EAGAIN) { 820 status = tmpstat; 821 break; 822 } 823 } 824 825 bail: 826 return status; 827 } 828 829 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 830 { 831 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 832 833 if (osb->s_mount_opt & hb_enabled) { 834 if (ocfs2_mount_local(osb)) { 835 mlog(ML_ERROR, "Cannot heartbeat on a locally " 836 "mounted device.\n"); 837 return -EINVAL; 838 } 839 if (ocfs2_userspace_stack(osb)) { 840 mlog(ML_ERROR, "Userspace stack expected, but " 841 "o2cb heartbeat arguments passed to mount\n"); 842 return -EINVAL; 843 } 844 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 845 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 846 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 847 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 848 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 849 return -EINVAL; 850 } 851 } 852 853 if (!(osb->s_mount_opt & hb_enabled)) { 854 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 855 !ocfs2_userspace_stack(osb)) { 856 mlog(ML_ERROR, "Heartbeat has to be started to mount " 857 "a read-write clustered device.\n"); 858 return -EINVAL; 859 } 860 } 861 862 return 0; 863 } 864 865 /* 866 * If we're using a userspace stack, mount should have passed 867 * a name that matches the disk. If not, mount should not 868 * have passed a stack. 869 */ 870 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 871 struct mount_options *mopt) 872 { 873 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 874 mlog(ML_ERROR, 875 "cluster stack passed to mount, but this filesystem " 876 "does not support it\n"); 877 return -EINVAL; 878 } 879 880 if (ocfs2_userspace_stack(osb) && 881 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 882 OCFS2_STACK_LABEL_LEN)) { 883 mlog(ML_ERROR, 884 "cluster stack passed to mount (\"%s\") does not " 885 "match the filesystem (\"%s\")\n", 886 mopt->cluster_stack, 887 osb->osb_cluster_stack); 888 return -EINVAL; 889 } 890 891 return 0; 892 } 893 894 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 895 { 896 int type; 897 struct super_block *sb = osb->sb; 898 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 899 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 900 int status = 0; 901 902 for (type = 0; type < MAXQUOTAS; type++) { 903 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 904 continue; 905 if (unsuspend) 906 status = dquot_resume(sb, type); 907 else { 908 struct ocfs2_mem_dqinfo *oinfo; 909 910 /* Cancel periodic syncing before suspending */ 911 oinfo = sb_dqinfo(sb, type)->dqi_priv; 912 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 913 status = dquot_suspend(sb, type); 914 } 915 if (status < 0) 916 break; 917 } 918 if (status < 0) 919 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 920 "remount (error = %d).\n", status); 921 return status; 922 } 923 924 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 925 { 926 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 927 struct super_block *sb = osb->sb; 928 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 929 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 930 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 931 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 932 int status; 933 int type; 934 935 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 936 for (type = 0; type < MAXQUOTAS; type++) { 937 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 938 continue; 939 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 940 osb->slot_num); 941 if (!inode[type]) { 942 status = -ENOENT; 943 goto out_quota_off; 944 } 945 status = dquot_enable(inode[type], type, QFMT_OCFS2, 946 DQUOT_USAGE_ENABLED); 947 if (status < 0) 948 goto out_quota_off; 949 } 950 951 for (type = 0; type < MAXQUOTAS; type++) 952 iput(inode[type]); 953 return 0; 954 out_quota_off: 955 ocfs2_disable_quotas(osb); 956 for (type = 0; type < MAXQUOTAS; type++) 957 iput(inode[type]); 958 mlog_errno(status); 959 return status; 960 } 961 962 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 963 { 964 int type; 965 struct inode *inode; 966 struct super_block *sb = osb->sb; 967 struct ocfs2_mem_dqinfo *oinfo; 968 969 /* We mostly ignore errors in this function because there's not much 970 * we can do when we see them */ 971 for (type = 0; type < MAXQUOTAS; type++) { 972 if (!sb_has_quota_loaded(sb, type)) 973 continue; 974 /* Cancel periodic syncing before we grab dqonoff_mutex */ 975 oinfo = sb_dqinfo(sb, type)->dqi_priv; 976 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 977 inode = igrab(sb->s_dquot.files[type]); 978 /* Turn off quotas. This will remove all dquot structures from 979 * memory and so they will be automatically synced to global 980 * quota files */ 981 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 982 DQUOT_LIMITS_ENABLED); 983 if (!inode) 984 continue; 985 iput(inode); 986 } 987 } 988 989 /* Handle quota on quotactl */ 990 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 991 char *path) 992 { 993 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 994 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 995 996 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 997 return -EINVAL; 998 999 return dquot_enable(sb_dqopt(sb)->files[type], type, 1000 format_id, DQUOT_LIMITS_ENABLED); 1001 } 1002 1003 /* Handle quota off quotactl */ 1004 static int ocfs2_quota_off(struct super_block *sb, int type) 1005 { 1006 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 1007 } 1008 1009 static const struct quotactl_ops ocfs2_quotactl_ops = { 1010 .quota_on = ocfs2_quota_on, 1011 .quota_off = ocfs2_quota_off, 1012 .quota_sync = dquot_quota_sync, 1013 .get_info = dquot_get_dqinfo, 1014 .set_info = dquot_set_dqinfo, 1015 .get_dqblk = dquot_get_dqblk, 1016 .set_dqblk = dquot_set_dqblk, 1017 }; 1018 1019 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1020 { 1021 struct dentry *root; 1022 int status, sector_size; 1023 struct mount_options parsed_options; 1024 struct inode *inode = NULL; 1025 struct ocfs2_super *osb = NULL; 1026 struct buffer_head *bh = NULL; 1027 char nodestr[8]; 1028 struct ocfs2_blockcheck_stats stats; 1029 1030 mlog_entry("%p, %p, %i", sb, data, silent); 1031 1032 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1033 status = -EINVAL; 1034 goto read_super_error; 1035 } 1036 1037 /* probe for superblock */ 1038 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1039 if (status < 0) { 1040 mlog(ML_ERROR, "superblock probe failed!\n"); 1041 goto read_super_error; 1042 } 1043 1044 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1045 osb = OCFS2_SB(sb); 1046 if (status < 0) { 1047 mlog_errno(status); 1048 goto read_super_error; 1049 } 1050 brelse(bh); 1051 bh = NULL; 1052 1053 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1054 status = -EINVAL; 1055 goto read_super_error; 1056 } 1057 osb->s_mount_opt = parsed_options.mount_opt; 1058 osb->s_atime_quantum = parsed_options.atime_quantum; 1059 osb->preferred_slot = parsed_options.slot; 1060 osb->osb_commit_interval = parsed_options.commit_interval; 1061 1062 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1063 osb->osb_resv_level = parsed_options.resv_level; 1064 osb->osb_dir_resv_level = parsed_options.resv_level; 1065 if (parsed_options.dir_resv_level == -1) 1066 osb->osb_dir_resv_level = parsed_options.resv_level; 1067 else 1068 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1069 1070 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1071 if (status) 1072 goto read_super_error; 1073 1074 sb->s_magic = OCFS2_SUPER_MAGIC; 1075 1076 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1077 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1078 1079 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1080 * heartbeat=none */ 1081 if (bdev_read_only(sb->s_bdev)) { 1082 if (!(sb->s_flags & MS_RDONLY)) { 1083 status = -EACCES; 1084 mlog(ML_ERROR, "Readonly device detected but readonly " 1085 "mount was not specified.\n"); 1086 goto read_super_error; 1087 } 1088 1089 /* You should not be able to start a local heartbeat 1090 * on a readonly device. */ 1091 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1092 status = -EROFS; 1093 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1094 "device.\n"); 1095 goto read_super_error; 1096 } 1097 1098 status = ocfs2_check_journals_nolocks(osb); 1099 if (status < 0) { 1100 if (status == -EROFS) 1101 mlog(ML_ERROR, "Recovery required on readonly " 1102 "file system, but write access is " 1103 "unavailable.\n"); 1104 else 1105 mlog_errno(status); 1106 goto read_super_error; 1107 } 1108 1109 ocfs2_set_ro_flag(osb, 1); 1110 1111 printk(KERN_NOTICE "Readonly device detected. No cluster " 1112 "services will be utilized for this mount. Recovery " 1113 "will be skipped.\n"); 1114 } 1115 1116 if (!ocfs2_is_hard_readonly(osb)) { 1117 if (sb->s_flags & MS_RDONLY) 1118 ocfs2_set_ro_flag(osb, 0); 1119 } 1120 1121 status = ocfs2_verify_heartbeat(osb); 1122 if (status < 0) { 1123 mlog_errno(status); 1124 goto read_super_error; 1125 } 1126 1127 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1128 ocfs2_debugfs_root); 1129 if (!osb->osb_debug_root) { 1130 status = -EINVAL; 1131 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1132 goto read_super_error; 1133 } 1134 1135 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1136 osb->osb_debug_root, 1137 osb, 1138 &ocfs2_osb_debug_fops); 1139 if (!osb->osb_ctxt) { 1140 status = -EINVAL; 1141 mlog_errno(status); 1142 goto read_super_error; 1143 } 1144 1145 if (ocfs2_meta_ecc(osb)) { 1146 status = ocfs2_blockcheck_stats_debugfs_install( 1147 &osb->osb_ecc_stats, 1148 osb->osb_debug_root); 1149 if (status) { 1150 mlog(ML_ERROR, 1151 "Unable to create blockcheck statistics " 1152 "files\n"); 1153 goto read_super_error; 1154 } 1155 } 1156 1157 status = ocfs2_mount_volume(sb); 1158 if (osb->root_inode) 1159 inode = igrab(osb->root_inode); 1160 1161 if (status < 0) 1162 goto read_super_error; 1163 1164 if (!inode) { 1165 status = -EIO; 1166 mlog_errno(status); 1167 goto read_super_error; 1168 } 1169 1170 root = d_alloc_root(inode); 1171 if (!root) { 1172 status = -ENOMEM; 1173 mlog_errno(status); 1174 goto read_super_error; 1175 } 1176 1177 sb->s_root = root; 1178 1179 ocfs2_complete_mount_recovery(osb); 1180 1181 if (ocfs2_mount_local(osb)) 1182 snprintf(nodestr, sizeof(nodestr), "local"); 1183 else 1184 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1185 1186 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1187 "with %s data mode.\n", 1188 osb->dev_str, nodestr, osb->slot_num, 1189 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1190 "ordered"); 1191 1192 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1193 wake_up(&osb->osb_mount_event); 1194 1195 /* Now we can initialize quotas because we can afford to wait 1196 * for cluster locks recovery now. That also means that truncation 1197 * log recovery can happen but that waits for proper quota setup */ 1198 if (!(sb->s_flags & MS_RDONLY)) { 1199 status = ocfs2_enable_quotas(osb); 1200 if (status < 0) { 1201 /* We have to err-out specially here because 1202 * s_root is already set */ 1203 mlog_errno(status); 1204 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1205 wake_up(&osb->osb_mount_event); 1206 mlog_exit(status); 1207 return status; 1208 } 1209 } 1210 1211 ocfs2_complete_quota_recovery(osb); 1212 1213 /* Now we wake up again for processes waiting for quotas */ 1214 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1215 wake_up(&osb->osb_mount_event); 1216 1217 /* Start this when the mount is almost sure of being successful */ 1218 ocfs2_orphan_scan_start(osb); 1219 1220 mlog_exit(status); 1221 return status; 1222 1223 read_super_error: 1224 brelse(bh); 1225 1226 if (inode) 1227 iput(inode); 1228 1229 if (osb) { 1230 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1231 wake_up(&osb->osb_mount_event); 1232 ocfs2_dismount_volume(sb, 1); 1233 } 1234 1235 mlog_exit(status); 1236 return status; 1237 } 1238 1239 static int ocfs2_get_sb(struct file_system_type *fs_type, 1240 int flags, 1241 const char *dev_name, 1242 void *data, 1243 struct vfsmount *mnt) 1244 { 1245 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 1246 mnt); 1247 } 1248 1249 static void ocfs2_kill_sb(struct super_block *sb) 1250 { 1251 struct ocfs2_super *osb = OCFS2_SB(sb); 1252 1253 /* Failed mount? */ 1254 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1255 goto out; 1256 1257 /* Prevent further queueing of inode drop events */ 1258 spin_lock(&dentry_list_lock); 1259 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1260 spin_unlock(&dentry_list_lock); 1261 /* Wait for work to finish and/or remove it */ 1262 cancel_work_sync(&osb->dentry_lock_work); 1263 out: 1264 kill_block_super(sb); 1265 } 1266 1267 static struct file_system_type ocfs2_fs_type = { 1268 .owner = THIS_MODULE, 1269 .name = "ocfs2", 1270 .get_sb = ocfs2_get_sb, /* is this called when we mount 1271 * the fs? */ 1272 .kill_sb = ocfs2_kill_sb, 1273 1274 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1275 .next = NULL 1276 }; 1277 1278 static int ocfs2_check_set_options(struct super_block *sb, 1279 struct mount_options *options) 1280 { 1281 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1282 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1283 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1284 mlog(ML_ERROR, "User quotas were requested, but this " 1285 "filesystem does not have the feature enabled.\n"); 1286 return 0; 1287 } 1288 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1289 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1290 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1291 mlog(ML_ERROR, "Group quotas were requested, but this " 1292 "filesystem does not have the feature enabled.\n"); 1293 return 0; 1294 } 1295 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1296 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1297 mlog(ML_ERROR, "ACL support requested but extended attributes " 1298 "feature is not enabled\n"); 1299 return 0; 1300 } 1301 /* No ACL setting specified? Use XATTR feature... */ 1302 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1303 OCFS2_MOUNT_NO_POSIX_ACL))) { 1304 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1305 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1306 else 1307 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1308 } 1309 return 1; 1310 } 1311 1312 static int ocfs2_parse_options(struct super_block *sb, 1313 char *options, 1314 struct mount_options *mopt, 1315 int is_remount) 1316 { 1317 int status; 1318 char *p; 1319 u32 tmp; 1320 1321 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1322 options ? options : "(none)"); 1323 1324 mopt->commit_interval = 0; 1325 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1326 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1327 mopt->slot = OCFS2_INVALID_SLOT; 1328 mopt->localalloc_opt = -1; 1329 mopt->cluster_stack[0] = '\0'; 1330 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1331 mopt->dir_resv_level = -1; 1332 1333 if (!options) { 1334 status = 1; 1335 goto bail; 1336 } 1337 1338 while ((p = strsep(&options, ",")) != NULL) { 1339 int token, option; 1340 substring_t args[MAX_OPT_ARGS]; 1341 1342 if (!*p) 1343 continue; 1344 1345 token = match_token(p, tokens, args); 1346 switch (token) { 1347 case Opt_hb_local: 1348 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1349 break; 1350 case Opt_hb_none: 1351 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1352 break; 1353 case Opt_hb_global: 1354 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1355 break; 1356 case Opt_barrier: 1357 if (match_int(&args[0], &option)) { 1358 status = 0; 1359 goto bail; 1360 } 1361 if (option) 1362 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1363 else 1364 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1365 break; 1366 case Opt_intr: 1367 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1368 break; 1369 case Opt_nointr: 1370 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1371 break; 1372 case Opt_err_panic: 1373 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1374 break; 1375 case Opt_err_ro: 1376 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1377 break; 1378 case Opt_data_ordered: 1379 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1380 break; 1381 case Opt_data_writeback: 1382 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1383 break; 1384 case Opt_user_xattr: 1385 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1386 break; 1387 case Opt_nouser_xattr: 1388 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1389 break; 1390 case Opt_atime_quantum: 1391 if (match_int(&args[0], &option)) { 1392 status = 0; 1393 goto bail; 1394 } 1395 if (option >= 0) 1396 mopt->atime_quantum = option; 1397 break; 1398 case Opt_slot: 1399 option = 0; 1400 if (match_int(&args[0], &option)) { 1401 status = 0; 1402 goto bail; 1403 } 1404 if (option) 1405 mopt->slot = (s16)option; 1406 break; 1407 case Opt_commit: 1408 option = 0; 1409 if (match_int(&args[0], &option)) { 1410 status = 0; 1411 goto bail; 1412 } 1413 if (option < 0) 1414 return 0; 1415 if (option == 0) 1416 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1417 mopt->commit_interval = HZ * option; 1418 break; 1419 case Opt_localalloc: 1420 option = 0; 1421 if (match_int(&args[0], &option)) { 1422 status = 0; 1423 goto bail; 1424 } 1425 if (option >= 0) 1426 mopt->localalloc_opt = option; 1427 break; 1428 case Opt_localflocks: 1429 /* 1430 * Changing this during remount could race 1431 * flock() requests, or "unbalance" existing 1432 * ones (e.g., a lock is taken in one mode but 1433 * dropped in the other). If users care enough 1434 * to flip locking modes during remount, we 1435 * could add a "local" flag to individual 1436 * flock structures for proper tracking of 1437 * state. 1438 */ 1439 if (!is_remount) 1440 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1441 break; 1442 case Opt_stack: 1443 /* Check both that the option we were passed 1444 * is of the right length and that it is a proper 1445 * string of the right length. 1446 */ 1447 if (((args[0].to - args[0].from) != 1448 OCFS2_STACK_LABEL_LEN) || 1449 (strnlen(args[0].from, 1450 OCFS2_STACK_LABEL_LEN) != 1451 OCFS2_STACK_LABEL_LEN)) { 1452 mlog(ML_ERROR, 1453 "Invalid cluster_stack option\n"); 1454 status = 0; 1455 goto bail; 1456 } 1457 memcpy(mopt->cluster_stack, args[0].from, 1458 OCFS2_STACK_LABEL_LEN); 1459 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 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 /* Ensure only one heartbeat mode */ 1516 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 1517 OCFS2_MOUNT_HB_NONE); 1518 if (hweight32(tmp) != 1) { 1519 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1520 status = 0; 1521 goto bail; 1522 } 1523 1524 status = 1; 1525 1526 bail: 1527 mlog_exit(status); 1528 return status; 1529 } 1530 1531 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1532 { 1533 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1534 unsigned long opts = osb->s_mount_opt; 1535 unsigned int local_alloc_megs; 1536 1537 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1538 seq_printf(s, ",_netdev"); 1539 if (opts & OCFS2_MOUNT_HB_LOCAL) 1540 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1541 else 1542 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1543 } else 1544 seq_printf(s, ",%s", OCFS2_HB_NONE); 1545 1546 if (opts & OCFS2_MOUNT_NOINTR) 1547 seq_printf(s, ",nointr"); 1548 1549 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1550 seq_printf(s, ",data=writeback"); 1551 else 1552 seq_printf(s, ",data=ordered"); 1553 1554 if (opts & OCFS2_MOUNT_BARRIER) 1555 seq_printf(s, ",barrier=1"); 1556 1557 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1558 seq_printf(s, ",errors=panic"); 1559 else 1560 seq_printf(s, ",errors=remount-ro"); 1561 1562 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1563 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1564 1565 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1566 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1567 1568 if (osb->osb_commit_interval) 1569 seq_printf(s, ",commit=%u", 1570 (unsigned) (osb->osb_commit_interval / HZ)); 1571 1572 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1573 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1574 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1575 1576 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1577 seq_printf(s, ",localflocks,"); 1578 1579 if (osb->osb_cluster_stack[0]) 1580 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1581 osb->osb_cluster_stack); 1582 if (opts & OCFS2_MOUNT_USRQUOTA) 1583 seq_printf(s, ",usrquota"); 1584 if (opts & OCFS2_MOUNT_GRPQUOTA) 1585 seq_printf(s, ",grpquota"); 1586 1587 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1588 seq_printf(s, ",coherency=buffered"); 1589 else 1590 seq_printf(s, ",coherency=full"); 1591 1592 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1593 seq_printf(s, ",nouser_xattr"); 1594 else 1595 seq_printf(s, ",user_xattr"); 1596 1597 if (opts & OCFS2_MOUNT_INODE64) 1598 seq_printf(s, ",inode64"); 1599 1600 if (opts & OCFS2_MOUNT_POSIX_ACL) 1601 seq_printf(s, ",acl"); 1602 else 1603 seq_printf(s, ",noacl"); 1604 1605 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1606 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1607 1608 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1609 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1610 1611 return 0; 1612 } 1613 1614 static int __init ocfs2_init(void) 1615 { 1616 int status; 1617 1618 mlog_entry_void(); 1619 1620 ocfs2_print_version(); 1621 1622 status = init_ocfs2_uptodate_cache(); 1623 if (status < 0) { 1624 mlog_errno(status); 1625 goto leave; 1626 } 1627 1628 status = ocfs2_initialize_mem_caches(); 1629 if (status < 0) { 1630 mlog_errno(status); 1631 goto leave; 1632 } 1633 1634 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1635 if (!ocfs2_wq) { 1636 status = -ENOMEM; 1637 goto leave; 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 status = ocfs2_quota_setup(); 1647 if (status) 1648 goto leave; 1649 1650 ocfs2_set_locking_protocol(); 1651 1652 status = register_quota_format(&ocfs2_quota_format); 1653 leave: 1654 if (status < 0) { 1655 ocfs2_quota_shutdown(); 1656 ocfs2_free_mem_caches(); 1657 exit_ocfs2_uptodate_cache(); 1658 } 1659 1660 mlog_exit(status); 1661 1662 if (status >= 0) { 1663 return register_filesystem(&ocfs2_fs_type); 1664 } else 1665 return -1; 1666 } 1667 1668 static void __exit ocfs2_exit(void) 1669 { 1670 mlog_entry_void(); 1671 1672 ocfs2_quota_shutdown(); 1673 1674 if (ocfs2_wq) { 1675 flush_workqueue(ocfs2_wq); 1676 destroy_workqueue(ocfs2_wq); 1677 } 1678 1679 unregister_quota_format(&ocfs2_quota_format); 1680 1681 debugfs_remove(ocfs2_debugfs_root); 1682 1683 ocfs2_free_mem_caches(); 1684 1685 unregister_filesystem(&ocfs2_fs_type); 1686 1687 exit_ocfs2_uptodate_cache(); 1688 1689 mlog_exit_void(); 1690 } 1691 1692 static void ocfs2_put_super(struct super_block *sb) 1693 { 1694 mlog_entry("(0x%p)\n", sb); 1695 1696 ocfs2_sync_blockdev(sb); 1697 ocfs2_dismount_volume(sb, 0); 1698 1699 mlog_exit_void(); 1700 } 1701 1702 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1703 { 1704 struct ocfs2_super *osb; 1705 u32 numbits, freebits; 1706 int status; 1707 struct ocfs2_dinode *bm_lock; 1708 struct buffer_head *bh = NULL; 1709 struct inode *inode = NULL; 1710 1711 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1712 1713 osb = OCFS2_SB(dentry->d_sb); 1714 1715 inode = ocfs2_get_system_file_inode(osb, 1716 GLOBAL_BITMAP_SYSTEM_INODE, 1717 OCFS2_INVALID_SLOT); 1718 if (!inode) { 1719 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1720 status = -EIO; 1721 goto bail; 1722 } 1723 1724 status = ocfs2_inode_lock(inode, &bh, 0); 1725 if (status < 0) { 1726 mlog_errno(status); 1727 goto bail; 1728 } 1729 1730 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1731 1732 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1733 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1734 1735 buf->f_type = OCFS2_SUPER_MAGIC; 1736 buf->f_bsize = dentry->d_sb->s_blocksize; 1737 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1738 buf->f_blocks = ((sector_t) numbits) * 1739 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1740 buf->f_bfree = ((sector_t) freebits) * 1741 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1742 buf->f_bavail = buf->f_bfree; 1743 buf->f_files = numbits; 1744 buf->f_ffree = freebits; 1745 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1746 & 0xFFFFFFFFUL; 1747 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1748 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1749 1750 brelse(bh); 1751 1752 ocfs2_inode_unlock(inode, 0); 1753 status = 0; 1754 bail: 1755 if (inode) 1756 iput(inode); 1757 1758 mlog_exit(status); 1759 1760 return status; 1761 } 1762 1763 static void ocfs2_inode_init_once(void *data) 1764 { 1765 struct ocfs2_inode_info *oi = data; 1766 1767 oi->ip_flags = 0; 1768 oi->ip_open_count = 0; 1769 spin_lock_init(&oi->ip_lock); 1770 ocfs2_extent_map_init(&oi->vfs_inode); 1771 INIT_LIST_HEAD(&oi->ip_io_markers); 1772 oi->ip_dir_start_lookup = 0; 1773 1774 init_rwsem(&oi->ip_alloc_sem); 1775 init_rwsem(&oi->ip_xattr_sem); 1776 mutex_init(&oi->ip_io_mutex); 1777 1778 oi->ip_blkno = 0ULL; 1779 oi->ip_clusters = 0; 1780 1781 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1782 1783 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1784 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1785 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1786 1787 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1788 &ocfs2_inode_caching_ops); 1789 1790 inode_init_once(&oi->vfs_inode); 1791 } 1792 1793 static int ocfs2_initialize_mem_caches(void) 1794 { 1795 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1796 sizeof(struct ocfs2_inode_info), 1797 0, 1798 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1799 SLAB_MEM_SPREAD), 1800 ocfs2_inode_init_once); 1801 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1802 sizeof(struct ocfs2_dquot), 1803 0, 1804 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1805 SLAB_MEM_SPREAD), 1806 NULL); 1807 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1808 sizeof(struct ocfs2_quota_chunk), 1809 0, 1810 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1811 NULL); 1812 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1813 !ocfs2_qf_chunk_cachep) { 1814 if (ocfs2_inode_cachep) 1815 kmem_cache_destroy(ocfs2_inode_cachep); 1816 if (ocfs2_dquot_cachep) 1817 kmem_cache_destroy(ocfs2_dquot_cachep); 1818 if (ocfs2_qf_chunk_cachep) 1819 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1820 return -ENOMEM; 1821 } 1822 1823 return 0; 1824 } 1825 1826 static void ocfs2_free_mem_caches(void) 1827 { 1828 if (ocfs2_inode_cachep) 1829 kmem_cache_destroy(ocfs2_inode_cachep); 1830 ocfs2_inode_cachep = NULL; 1831 1832 if (ocfs2_dquot_cachep) 1833 kmem_cache_destroy(ocfs2_dquot_cachep); 1834 ocfs2_dquot_cachep = NULL; 1835 1836 if (ocfs2_qf_chunk_cachep) 1837 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1838 ocfs2_qf_chunk_cachep = NULL; 1839 } 1840 1841 static int ocfs2_get_sector(struct super_block *sb, 1842 struct buffer_head **bh, 1843 int block, 1844 int sect_size) 1845 { 1846 if (!sb_set_blocksize(sb, sect_size)) { 1847 mlog(ML_ERROR, "unable to set blocksize\n"); 1848 return -EIO; 1849 } 1850 1851 *bh = sb_getblk(sb, block); 1852 if (!*bh) { 1853 mlog_errno(-EIO); 1854 return -EIO; 1855 } 1856 lock_buffer(*bh); 1857 if (!buffer_dirty(*bh)) 1858 clear_buffer_uptodate(*bh); 1859 unlock_buffer(*bh); 1860 ll_rw_block(READ, 1, bh); 1861 wait_on_buffer(*bh); 1862 if (!buffer_uptodate(*bh)) { 1863 mlog_errno(-EIO); 1864 brelse(*bh); 1865 *bh = NULL; 1866 return -EIO; 1867 } 1868 1869 return 0; 1870 } 1871 1872 static int ocfs2_mount_volume(struct super_block *sb) 1873 { 1874 int status = 0; 1875 int unlock_super = 0; 1876 struct ocfs2_super *osb = OCFS2_SB(sb); 1877 1878 mlog_entry_void(); 1879 1880 if (ocfs2_is_hard_readonly(osb)) 1881 goto leave; 1882 1883 status = ocfs2_dlm_init(osb); 1884 if (status < 0) { 1885 mlog_errno(status); 1886 goto leave; 1887 } 1888 1889 status = ocfs2_super_lock(osb, 1); 1890 if (status < 0) { 1891 mlog_errno(status); 1892 goto leave; 1893 } 1894 unlock_super = 1; 1895 1896 /* This will load up the node map and add ourselves to it. */ 1897 status = ocfs2_find_slot(osb); 1898 if (status < 0) { 1899 mlog_errno(status); 1900 goto leave; 1901 } 1902 1903 /* load all node-local system inodes */ 1904 status = ocfs2_init_local_system_inodes(osb); 1905 if (status < 0) { 1906 mlog_errno(status); 1907 goto leave; 1908 } 1909 1910 status = ocfs2_check_volume(osb); 1911 if (status < 0) { 1912 mlog_errno(status); 1913 goto leave; 1914 } 1915 1916 status = ocfs2_truncate_log_init(osb); 1917 if (status < 0) 1918 mlog_errno(status); 1919 1920 leave: 1921 if (unlock_super) 1922 ocfs2_super_unlock(osb, 1); 1923 1924 mlog_exit(status); 1925 return status; 1926 } 1927 1928 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1929 { 1930 int tmp, hangup_needed = 0; 1931 struct ocfs2_super *osb = NULL; 1932 char nodestr[8]; 1933 1934 mlog_entry("(0x%p)\n", sb); 1935 1936 BUG_ON(!sb); 1937 osb = OCFS2_SB(sb); 1938 BUG_ON(!osb); 1939 1940 debugfs_remove(osb->osb_ctxt); 1941 1942 /* 1943 * Flush inode dropping work queue so that deletes are 1944 * performed while the filesystem is still working 1945 */ 1946 ocfs2_drop_all_dl_inodes(osb); 1947 1948 /* Orphan scan should be stopped as early as possible */ 1949 ocfs2_orphan_scan_stop(osb); 1950 1951 ocfs2_disable_quotas(osb); 1952 1953 ocfs2_shutdown_local_alloc(osb); 1954 1955 ocfs2_truncate_log_shutdown(osb); 1956 1957 /* This will disable recovery and flush any recovery work. */ 1958 ocfs2_recovery_exit(osb); 1959 1960 ocfs2_journal_shutdown(osb); 1961 1962 ocfs2_sync_blockdev(sb); 1963 1964 ocfs2_purge_refcount_trees(osb); 1965 1966 /* No cluster connection means we've failed during mount, so skip 1967 * all the steps which depended on that to complete. */ 1968 if (osb->cconn) { 1969 tmp = ocfs2_super_lock(osb, 1); 1970 if (tmp < 0) { 1971 mlog_errno(tmp); 1972 return; 1973 } 1974 } 1975 1976 if (osb->slot_num != OCFS2_INVALID_SLOT) 1977 ocfs2_put_slot(osb); 1978 1979 if (osb->cconn) 1980 ocfs2_super_unlock(osb, 1); 1981 1982 ocfs2_release_system_inodes(osb); 1983 1984 /* 1985 * If we're dismounting due to mount error, mount.ocfs2 will clean 1986 * up heartbeat. If we're a local mount, there is no heartbeat. 1987 * If we failed before we got a uuid_str yet, we can't stop 1988 * heartbeat. Otherwise, do it. 1989 */ 1990 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1991 hangup_needed = 1; 1992 1993 if (osb->cconn) 1994 ocfs2_dlm_shutdown(osb, hangup_needed); 1995 1996 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1997 debugfs_remove(osb->osb_debug_root); 1998 1999 if (hangup_needed) 2000 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 2001 2002 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 2003 2004 if (ocfs2_mount_local(osb)) 2005 snprintf(nodestr, sizeof(nodestr), "local"); 2006 else 2007 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 2008 2009 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 2010 osb->dev_str, nodestr); 2011 2012 ocfs2_delete_osb(osb); 2013 kfree(osb); 2014 sb->s_dev = 0; 2015 sb->s_fs_info = NULL; 2016 } 2017 2018 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2019 unsigned uuid_bytes) 2020 { 2021 int i, ret; 2022 char *ptr; 2023 2024 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2025 2026 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2027 if (osb->uuid_str == NULL) 2028 return -ENOMEM; 2029 2030 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2031 /* print with null */ 2032 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2033 if (ret != 2) /* drop super cleans up */ 2034 return -EINVAL; 2035 /* then only advance past the last char */ 2036 ptr += 2; 2037 } 2038 2039 return 0; 2040 } 2041 2042 /* Make sure entire volume is addressable by our journal. Requires 2043 osb_clusters_at_boot to be valid and for the journal to have been 2044 initialized by ocfs2_journal_init(). */ 2045 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2046 { 2047 int status = 0; 2048 u64 max_block = 2049 ocfs2_clusters_to_blocks(osb->sb, 2050 osb->osb_clusters_at_boot) - 1; 2051 2052 /* 32-bit block number is always OK. */ 2053 if (max_block <= (u32)~0ULL) 2054 goto out; 2055 2056 /* Volume is "huge", so see if our journal is new enough to 2057 support it. */ 2058 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2059 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2060 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2061 JBD2_FEATURE_INCOMPAT_64BIT))) { 2062 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2063 "Enable the 'block64' journal option with tunefs.ocfs2"); 2064 status = -EFBIG; 2065 goto out; 2066 } 2067 2068 out: 2069 return status; 2070 } 2071 2072 static int ocfs2_initialize_super(struct super_block *sb, 2073 struct buffer_head *bh, 2074 int sector_size, 2075 struct ocfs2_blockcheck_stats *stats) 2076 { 2077 int status; 2078 int i, cbits, bbits; 2079 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2080 struct inode *inode = NULL; 2081 struct ocfs2_journal *journal; 2082 __le32 uuid_net_key; 2083 struct ocfs2_super *osb; 2084 u64 total_blocks; 2085 2086 mlog_entry_void(); 2087 2088 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2089 if (!osb) { 2090 status = -ENOMEM; 2091 mlog_errno(status); 2092 goto bail; 2093 } 2094 2095 sb->s_fs_info = osb; 2096 sb->s_op = &ocfs2_sops; 2097 sb->s_export_op = &ocfs2_export_ops; 2098 sb->s_qcop = &ocfs2_quotactl_ops; 2099 sb->dq_op = &ocfs2_quota_operations; 2100 sb->s_xattr = ocfs2_xattr_handlers; 2101 sb->s_time_gran = 1; 2102 sb->s_flags |= MS_NOATIME; 2103 /* this is needed to support O_LARGEFILE */ 2104 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2105 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2106 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2107 2108 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2109 2110 for (i = 0; i < 3; i++) 2111 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2112 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2113 2114 osb->sb = sb; 2115 /* Save off for ocfs2_rw_direct */ 2116 osb->s_sectsize_bits = blksize_bits(sector_size); 2117 BUG_ON(!osb->s_sectsize_bits); 2118 2119 spin_lock_init(&osb->dc_task_lock); 2120 init_waitqueue_head(&osb->dc_event); 2121 osb->dc_work_sequence = 0; 2122 osb->dc_wake_sequence = 0; 2123 INIT_LIST_HEAD(&osb->blocked_lock_list); 2124 osb->blocked_lock_count = 0; 2125 spin_lock_init(&osb->osb_lock); 2126 spin_lock_init(&osb->osb_xattr_lock); 2127 ocfs2_init_steal_slots(osb); 2128 2129 atomic_set(&osb->alloc_stats.moves, 0); 2130 atomic_set(&osb->alloc_stats.local_data, 0); 2131 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2132 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2133 atomic_set(&osb->alloc_stats.bg_extends, 0); 2134 2135 /* Copy the blockcheck stats from the superblock probe */ 2136 osb->osb_ecc_stats = *stats; 2137 2138 ocfs2_init_node_maps(osb); 2139 2140 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2141 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2142 2143 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2144 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2145 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2146 osb->max_slots); 2147 status = -EINVAL; 2148 goto bail; 2149 } 2150 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 2151 2152 ocfs2_orphan_scan_init(osb); 2153 2154 status = ocfs2_recovery_init(osb); 2155 if (status) { 2156 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2157 mlog_errno(status); 2158 goto bail; 2159 } 2160 2161 init_waitqueue_head(&osb->checkpoint_event); 2162 atomic_set(&osb->needs_checkpoint, 0); 2163 2164 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2165 2166 osb->slot_num = OCFS2_INVALID_SLOT; 2167 2168 osb->s_xattr_inline_size = le16_to_cpu( 2169 di->id2.i_super.s_xattr_inline_size); 2170 2171 osb->local_alloc_state = OCFS2_LA_UNUSED; 2172 osb->local_alloc_bh = NULL; 2173 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2174 2175 init_waitqueue_head(&osb->osb_mount_event); 2176 2177 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2178 if (status) { 2179 mlog_errno(status); 2180 goto bail; 2181 } 2182 2183 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2184 if (!osb->vol_label) { 2185 mlog(ML_ERROR, "unable to alloc vol label\n"); 2186 status = -ENOMEM; 2187 goto bail; 2188 } 2189 2190 osb->slot_recovery_generations = 2191 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2192 GFP_KERNEL); 2193 if (!osb->slot_recovery_generations) { 2194 status = -ENOMEM; 2195 mlog_errno(status); 2196 goto bail; 2197 } 2198 2199 init_waitqueue_head(&osb->osb_wipe_event); 2200 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2201 sizeof(*osb->osb_orphan_wipes), 2202 GFP_KERNEL); 2203 if (!osb->osb_orphan_wipes) { 2204 status = -ENOMEM; 2205 mlog_errno(status); 2206 goto bail; 2207 } 2208 2209 osb->osb_rf_lock_tree = RB_ROOT; 2210 2211 osb->s_feature_compat = 2212 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2213 osb->s_feature_ro_compat = 2214 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2215 osb->s_feature_incompat = 2216 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2217 2218 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2219 mlog(ML_ERROR, "couldn't mount because of unsupported " 2220 "optional features (%x).\n", i); 2221 status = -EINVAL; 2222 goto bail; 2223 } 2224 if (!(osb->sb->s_flags & MS_RDONLY) && 2225 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2226 mlog(ML_ERROR, "couldn't mount RDWR because of " 2227 "unsupported optional features (%x).\n", i); 2228 status = -EINVAL; 2229 goto bail; 2230 } 2231 2232 if (ocfs2_clusterinfo_valid(osb)) { 2233 osb->osb_stackflags = 2234 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2235 memcpy(osb->osb_cluster_stack, 2236 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2237 OCFS2_STACK_LABEL_LEN); 2238 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2239 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2240 mlog(ML_ERROR, 2241 "couldn't mount because of an invalid " 2242 "cluster stack label (%s) \n", 2243 osb->osb_cluster_stack); 2244 status = -EINVAL; 2245 goto bail; 2246 } 2247 } else { 2248 /* The empty string is identical with classic tools that 2249 * don't know about s_cluster_info. */ 2250 osb->osb_cluster_stack[0] = '\0'; 2251 } 2252 2253 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2254 2255 /* FIXME 2256 * This should be done in ocfs2_journal_init(), but unknown 2257 * ordering issues will cause the filesystem to crash. 2258 * If anyone wants to figure out what part of the code 2259 * refers to osb->journal before ocfs2_journal_init() is run, 2260 * be my guest. 2261 */ 2262 /* initialize our journal structure */ 2263 2264 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2265 if (!journal) { 2266 mlog(ML_ERROR, "unable to alloc journal\n"); 2267 status = -ENOMEM; 2268 goto bail; 2269 } 2270 osb->journal = journal; 2271 journal->j_osb = osb; 2272 2273 atomic_set(&journal->j_num_trans, 0); 2274 init_rwsem(&journal->j_trans_barrier); 2275 init_waitqueue_head(&journal->j_checkpointed); 2276 spin_lock_init(&journal->j_lock); 2277 journal->j_trans_id = (unsigned long) 1; 2278 INIT_LIST_HEAD(&journal->j_la_cleanups); 2279 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2280 journal->j_state = OCFS2_JOURNAL_FREE; 2281 2282 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2283 osb->dentry_lock_list = NULL; 2284 2285 /* get some pseudo constants for clustersize bits */ 2286 osb->s_clustersize_bits = 2287 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2288 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2289 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 2290 2291 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2292 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2293 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2294 osb->s_clustersize); 2295 status = -EINVAL; 2296 goto bail; 2297 } 2298 2299 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2300 le32_to_cpu(di->i_clusters)); 2301 2302 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2303 total_blocks); 2304 if (status) { 2305 mlog(ML_ERROR, "Volume too large " 2306 "to mount safely on this system"); 2307 status = -EFBIG; 2308 goto bail; 2309 } 2310 2311 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2312 sizeof(di->id2.i_super.s_uuid))) { 2313 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2314 status = -ENOMEM; 2315 goto bail; 2316 } 2317 2318 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2319 2320 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2321 osb->vol_label[63] = '\0'; 2322 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2323 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2324 osb->first_cluster_group_blkno = 2325 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2326 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2327 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2328 mlog(0, "vol_label: %s\n", osb->vol_label); 2329 mlog(0, "uuid: %s\n", osb->uuid_str); 2330 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 2331 (unsigned long long)osb->root_blkno, 2332 (unsigned long long)osb->system_dir_blkno); 2333 2334 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2335 if (!osb->osb_dlm_debug) { 2336 status = -ENOMEM; 2337 mlog_errno(status); 2338 goto bail; 2339 } 2340 2341 atomic_set(&osb->vol_state, VOLUME_INIT); 2342 2343 /* load root, system_dir, and all global system inodes */ 2344 status = ocfs2_init_global_system_inodes(osb); 2345 if (status < 0) { 2346 mlog_errno(status); 2347 goto bail; 2348 } 2349 2350 /* 2351 * global bitmap 2352 */ 2353 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2354 OCFS2_INVALID_SLOT); 2355 if (!inode) { 2356 status = -EINVAL; 2357 mlog_errno(status); 2358 goto bail; 2359 } 2360 2361 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2362 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2363 iput(inode); 2364 2365 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2366 osb->s_feature_incompat) * 8; 2367 2368 status = ocfs2_init_slot_info(osb); 2369 if (status < 0) { 2370 mlog_errno(status); 2371 goto bail; 2372 } 2373 2374 bail: 2375 mlog_exit(status); 2376 return status; 2377 } 2378 2379 /* 2380 * will return: -EAGAIN if it is ok to keep searching for superblocks 2381 * -EINVAL if there is a bad superblock 2382 * 0 on success 2383 */ 2384 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2385 struct buffer_head *bh, 2386 u32 blksz, 2387 struct ocfs2_blockcheck_stats *stats) 2388 { 2389 int status = -EAGAIN; 2390 2391 mlog_entry_void(); 2392 2393 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2394 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2395 /* We have to do a raw check of the feature here */ 2396 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2397 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2398 status = ocfs2_block_check_validate(bh->b_data, 2399 bh->b_size, 2400 &di->i_check, 2401 stats); 2402 if (status) 2403 goto out; 2404 } 2405 status = -EINVAL; 2406 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2407 mlog(ML_ERROR, "found superblock with incorrect block " 2408 "size: found %u, should be %u\n", 2409 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2410 blksz); 2411 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2412 OCFS2_MAJOR_REV_LEVEL || 2413 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2414 OCFS2_MINOR_REV_LEVEL) { 2415 mlog(ML_ERROR, "found superblock with bad version: " 2416 "found %u.%u, should be %u.%u\n", 2417 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2418 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2419 OCFS2_MAJOR_REV_LEVEL, 2420 OCFS2_MINOR_REV_LEVEL); 2421 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2422 mlog(ML_ERROR, "bad block number on superblock: " 2423 "found %llu, should be %llu\n", 2424 (unsigned long long)le64_to_cpu(di->i_blkno), 2425 (unsigned long long)bh->b_blocknr); 2426 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2427 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2428 mlog(ML_ERROR, "bad cluster size found: %u\n", 2429 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2430 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2431 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2432 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2433 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2434 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2435 mlog(ML_ERROR, 2436 "Superblock slots found greater than file system " 2437 "maximum: found %u, max %u\n", 2438 le16_to_cpu(di->id2.i_super.s_max_slots), 2439 OCFS2_MAX_SLOTS); 2440 } else { 2441 /* found it! */ 2442 status = 0; 2443 } 2444 } 2445 2446 out: 2447 mlog_exit(status); 2448 return status; 2449 } 2450 2451 static int ocfs2_check_volume(struct ocfs2_super *osb) 2452 { 2453 int status; 2454 int dirty; 2455 int local; 2456 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2457 * recover 2458 * ourselves. */ 2459 2460 mlog_entry_void(); 2461 2462 /* Init our journal object. */ 2463 status = ocfs2_journal_init(osb->journal, &dirty); 2464 if (status < 0) { 2465 mlog(ML_ERROR, "Could not initialize journal!\n"); 2466 goto finally; 2467 } 2468 2469 /* Now that journal has been initialized, check to make sure 2470 entire volume is addressable. */ 2471 status = ocfs2_journal_addressable(osb); 2472 if (status) 2473 goto finally; 2474 2475 /* If the journal was unmounted cleanly then we don't want to 2476 * recover anything. Otherwise, journal_load will do that 2477 * dirty work for us :) */ 2478 if (!dirty) { 2479 status = ocfs2_journal_wipe(osb->journal, 0); 2480 if (status < 0) { 2481 mlog_errno(status); 2482 goto finally; 2483 } 2484 } else { 2485 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2486 "recovering volume.\n"); 2487 } 2488 2489 local = ocfs2_mount_local(osb); 2490 2491 /* will play back anything left in the journal. */ 2492 status = ocfs2_journal_load(osb->journal, local, dirty); 2493 if (status < 0) { 2494 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2495 goto finally; 2496 } 2497 2498 if (dirty) { 2499 /* recover my local alloc if we didn't unmount cleanly. */ 2500 status = ocfs2_begin_local_alloc_recovery(osb, 2501 osb->slot_num, 2502 &local_alloc); 2503 if (status < 0) { 2504 mlog_errno(status); 2505 goto finally; 2506 } 2507 /* we complete the recovery process after we've marked 2508 * ourselves as mounted. */ 2509 } 2510 2511 mlog(0, "Journal loaded.\n"); 2512 2513 status = ocfs2_load_local_alloc(osb); 2514 if (status < 0) { 2515 mlog_errno(status); 2516 goto finally; 2517 } 2518 2519 if (dirty) { 2520 /* Recovery will be completed after we've mounted the 2521 * rest of the volume. */ 2522 osb->dirty = 1; 2523 osb->local_alloc_copy = local_alloc; 2524 local_alloc = NULL; 2525 } 2526 2527 /* go through each journal, trylock it and if you get the 2528 * lock, and it's marked as dirty, set the bit in the recover 2529 * map and launch a recovery thread for it. */ 2530 status = ocfs2_mark_dead_nodes(osb); 2531 if (status < 0) { 2532 mlog_errno(status); 2533 goto finally; 2534 } 2535 2536 status = ocfs2_compute_replay_slots(osb); 2537 if (status < 0) 2538 mlog_errno(status); 2539 2540 finally: 2541 if (local_alloc) 2542 kfree(local_alloc); 2543 2544 mlog_exit(status); 2545 return status; 2546 } 2547 2548 /* 2549 * The routine gets called from dismount or close whenever a dismount on 2550 * volume is requested and the osb open count becomes 1. 2551 * It will remove the osb from the global list and also free up all the 2552 * initialized resources and fileobject. 2553 */ 2554 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2555 { 2556 mlog_entry_void(); 2557 2558 /* This function assumes that the caller has the main osb resource */ 2559 2560 ocfs2_free_slot_info(osb); 2561 2562 kfree(osb->osb_orphan_wipes); 2563 kfree(osb->slot_recovery_generations); 2564 /* FIXME 2565 * This belongs in journal shutdown, but because we have to 2566 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2567 * we free it here. 2568 */ 2569 kfree(osb->journal); 2570 if (osb->local_alloc_copy) 2571 kfree(osb->local_alloc_copy); 2572 kfree(osb->uuid_str); 2573 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2574 memset(osb, 0, sizeof(struct ocfs2_super)); 2575 2576 mlog_exit_void(); 2577 } 2578 2579 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2580 * panic(). We do not support continue-on-error operation. */ 2581 static void ocfs2_handle_error(struct super_block *sb) 2582 { 2583 struct ocfs2_super *osb = OCFS2_SB(sb); 2584 2585 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2586 panic("OCFS2: (device %s): panic forced after error\n", 2587 sb->s_id); 2588 2589 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2590 2591 if (sb->s_flags & MS_RDONLY && 2592 (ocfs2_is_soft_readonly(osb) || 2593 ocfs2_is_hard_readonly(osb))) 2594 return; 2595 2596 printk(KERN_CRIT "File system is now read-only due to the potential " 2597 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2598 "system is unmounted.\n"); 2599 sb->s_flags |= MS_RDONLY; 2600 ocfs2_set_ro_flag(osb, 0); 2601 } 2602 2603 static char error_buf[1024]; 2604 2605 void __ocfs2_error(struct super_block *sb, 2606 const char *function, 2607 const char *fmt, ...) 2608 { 2609 va_list args; 2610 2611 va_start(args, fmt); 2612 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2613 va_end(args); 2614 2615 /* Not using mlog here because we want to show the actual 2616 * function the error came from. */ 2617 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2618 sb->s_id, function, error_buf); 2619 2620 ocfs2_handle_error(sb); 2621 } 2622 2623 /* Handle critical errors. This is intentionally more drastic than 2624 * ocfs2_handle_error, so we only use for things like journal errors, 2625 * etc. */ 2626 void __ocfs2_abort(struct super_block* sb, 2627 const char *function, 2628 const char *fmt, ...) 2629 { 2630 va_list args; 2631 2632 va_start(args, fmt); 2633 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2634 va_end(args); 2635 2636 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2637 sb->s_id, function, error_buf); 2638 2639 /* We don't have the cluster support yet to go straight to 2640 * hard readonly in here. Until then, we want to keep 2641 * ocfs2_abort() so that we can at least mark critical 2642 * errors. 2643 * 2644 * TODO: This should abort the journal and alert other nodes 2645 * that our slot needs recovery. */ 2646 2647 /* Force a panic(). This stinks, but it's better than letting 2648 * things continue without having a proper hard readonly 2649 * here. */ 2650 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2651 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2652 ocfs2_handle_error(sb); 2653 } 2654 2655 /* 2656 * Void signal blockers, because in-kernel sigprocmask() only fails 2657 * when SIG_* is wrong. 2658 */ 2659 void ocfs2_block_signals(sigset_t *oldset) 2660 { 2661 int rc; 2662 sigset_t blocked; 2663 2664 sigfillset(&blocked); 2665 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2666 BUG_ON(rc); 2667 } 2668 2669 void ocfs2_unblock_signals(sigset_t *oldset) 2670 { 2671 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2672 BUG_ON(rc); 2673 } 2674 2675 module_init(ocfs2_init); 2676 module_exit(ocfs2_exit); 2677