1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/init.h> 32 #include <linux/random.h> 33 #include <linux/statfs.h> 34 #include <linux/moduleparam.h> 35 #include <linux/blkdev.h> 36 #include <linux/socket.h> 37 #include <linux/inet.h> 38 #include <linux/parser.h> 39 #include <linux/crc32.h> 40 #include <linux/debugfs.h> 41 #include <linux/mount.h> 42 #include <linux/seq_file.h> 43 #include <linux/quotaops.h> 44 #include <linux/cleancache.h> 45 46 #define CREATE_TRACE_POINTS 47 #include "ocfs2_trace.h" 48 49 #include <cluster/masklog.h> 50 51 #include "ocfs2.h" 52 53 /* this should be the only file to include a version 1 header */ 54 #include "ocfs1_fs_compat.h" 55 56 #include "alloc.h" 57 #include "aops.h" 58 #include "blockcheck.h" 59 #include "dlmglue.h" 60 #include "export.h" 61 #include "extent_map.h" 62 #include "heartbeat.h" 63 #include "inode.h" 64 #include "journal.h" 65 #include "localalloc.h" 66 #include "namei.h" 67 #include "slot_map.h" 68 #include "super.h" 69 #include "sysfile.h" 70 #include "uptodate.h" 71 #include "ver.h" 72 #include "xattr.h" 73 #include "quota.h" 74 #include "refcounttree.h" 75 #include "suballoc.h" 76 77 #include "buffer_head_io.h" 78 79 static struct kmem_cache *ocfs2_inode_cachep = NULL; 80 struct kmem_cache *ocfs2_dquot_cachep; 81 struct kmem_cache *ocfs2_qf_chunk_cachep; 82 83 /* OCFS2 needs to schedule several different types of work which 84 * require cluster locking, disk I/O, recovery waits, etc. Since these 85 * types of work tend to be heavy we avoid using the kernel events 86 * workqueue and schedule on our own. */ 87 struct workqueue_struct *ocfs2_wq = NULL; 88 89 static struct dentry *ocfs2_debugfs_root = NULL; 90 91 MODULE_AUTHOR("Oracle"); 92 MODULE_LICENSE("GPL"); 93 94 struct mount_options 95 { 96 unsigned long commit_interval; 97 unsigned long mount_opt; 98 unsigned int atime_quantum; 99 signed short slot; 100 int localalloc_opt; 101 unsigned int resv_level; 102 int dir_resv_level; 103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 104 }; 105 106 static int ocfs2_parse_options(struct super_block *sb, char *options, 107 struct mount_options *mopt, 108 int is_remount); 109 static int ocfs2_check_set_options(struct super_block *sb, 110 struct mount_options *options); 111 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 112 static void ocfs2_put_super(struct super_block *sb); 113 static int ocfs2_mount_volume(struct super_block *sb); 114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 116 static int ocfs2_initialize_mem_caches(void); 117 static void ocfs2_free_mem_caches(void); 118 static void ocfs2_delete_osb(struct ocfs2_super *osb); 119 120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 121 122 static int ocfs2_sync_fs(struct super_block *sb, int wait); 123 124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 127 static int ocfs2_check_volume(struct ocfs2_super *osb); 128 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 129 struct buffer_head *bh, 130 u32 sectsize, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_initialize_super(struct super_block *sb, 133 struct buffer_head *bh, 134 int sector_size, 135 struct ocfs2_blockcheck_stats *stats); 136 static int ocfs2_get_sector(struct super_block *sb, 137 struct buffer_head **bh, 138 int block, 139 int sect_size); 140 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 141 static void ocfs2_destroy_inode(struct inode *inode); 142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 143 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 144 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 145 146 static const struct super_operations ocfs2_sops = { 147 .statfs = ocfs2_statfs, 148 .alloc_inode = ocfs2_alloc_inode, 149 .destroy_inode = ocfs2_destroy_inode, 150 .drop_inode = ocfs2_drop_inode, 151 .evict_inode = ocfs2_evict_inode, 152 .sync_fs = ocfs2_sync_fs, 153 .put_super = ocfs2_put_super, 154 .remount_fs = ocfs2_remount, 155 .show_options = ocfs2_show_options, 156 .quota_read = ocfs2_quota_read, 157 .quota_write = ocfs2_quota_write, 158 }; 159 160 enum { 161 Opt_barrier, 162 Opt_err_panic, 163 Opt_err_ro, 164 Opt_intr, 165 Opt_nointr, 166 Opt_hb_none, 167 Opt_hb_local, 168 Opt_hb_global, 169 Opt_data_ordered, 170 Opt_data_writeback, 171 Opt_atime_quantum, 172 Opt_slot, 173 Opt_commit, 174 Opt_localalloc, 175 Opt_localflocks, 176 Opt_stack, 177 Opt_user_xattr, 178 Opt_nouser_xattr, 179 Opt_inode64, 180 Opt_acl, 181 Opt_noacl, 182 Opt_usrquota, 183 Opt_grpquota, 184 Opt_coherency_buffered, 185 Opt_coherency_full, 186 Opt_resv_level, 187 Opt_dir_resv_level, 188 Opt_err, 189 }; 190 191 static const match_table_t tokens = { 192 {Opt_barrier, "barrier=%u"}, 193 {Opt_err_panic, "errors=panic"}, 194 {Opt_err_ro, "errors=remount-ro"}, 195 {Opt_intr, "intr"}, 196 {Opt_nointr, "nointr"}, 197 {Opt_hb_none, OCFS2_HB_NONE}, 198 {Opt_hb_local, OCFS2_HB_LOCAL}, 199 {Opt_hb_global, OCFS2_HB_GLOBAL}, 200 {Opt_data_ordered, "data=ordered"}, 201 {Opt_data_writeback, "data=writeback"}, 202 {Opt_atime_quantum, "atime_quantum=%u"}, 203 {Opt_slot, "preferred_slot=%u"}, 204 {Opt_commit, "commit=%u"}, 205 {Opt_localalloc, "localalloc=%d"}, 206 {Opt_localflocks, "localflocks"}, 207 {Opt_stack, "cluster_stack=%s"}, 208 {Opt_user_xattr, "user_xattr"}, 209 {Opt_nouser_xattr, "nouser_xattr"}, 210 {Opt_inode64, "inode64"}, 211 {Opt_acl, "acl"}, 212 {Opt_noacl, "noacl"}, 213 {Opt_usrquota, "usrquota"}, 214 {Opt_grpquota, "grpquota"}, 215 {Opt_coherency_buffered, "coherency=buffered"}, 216 {Opt_coherency_full, "coherency=full"}, 217 {Opt_resv_level, "resv_level=%u"}, 218 {Opt_dir_resv_level, "dir_resv_level=%u"}, 219 {Opt_err, NULL} 220 }; 221 222 #ifdef CONFIG_DEBUG_FS 223 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 224 { 225 struct ocfs2_cluster_connection *cconn = osb->cconn; 226 struct ocfs2_recovery_map *rm = osb->recovery_map; 227 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 228 int i, out = 0; 229 230 out += snprintf(buf + out, len - out, 231 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 232 "Device", osb->dev_str, osb->uuid_str, 233 osb->fs_generation, osb->vol_label); 234 235 out += snprintf(buf + out, len - out, 236 "%10s => State: %d Flags: 0x%lX\n", "Volume", 237 atomic_read(&osb->vol_state), osb->osb_flags); 238 239 out += snprintf(buf + out, len - out, 240 "%10s => Block: %lu Cluster: %d\n", "Sizes", 241 osb->sb->s_blocksize, osb->s_clustersize); 242 243 out += snprintf(buf + out, len - out, 244 "%10s => Compat: 0x%X Incompat: 0x%X " 245 "ROcompat: 0x%X\n", 246 "Features", osb->s_feature_compat, 247 osb->s_feature_incompat, osb->s_feature_ro_compat); 248 249 out += snprintf(buf + out, len - out, 250 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 251 osb->s_mount_opt, osb->s_atime_quantum); 252 253 if (cconn) { 254 out += snprintf(buf + out, len - out, 255 "%10s => Stack: %s Name: %*s " 256 "Version: %d.%d\n", "Cluster", 257 (*osb->osb_cluster_stack == '\0' ? 258 "o2cb" : osb->osb_cluster_stack), 259 cconn->cc_namelen, cconn->cc_name, 260 cconn->cc_version.pv_major, 261 cconn->cc_version.pv_minor); 262 } 263 264 spin_lock(&osb->dc_task_lock); 265 out += snprintf(buf + out, len - out, 266 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 267 "WorkSeq: %lu\n", "DownCnvt", 268 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 269 osb->blocked_lock_count, osb->dc_wake_sequence, 270 osb->dc_work_sequence); 271 spin_unlock(&osb->dc_task_lock); 272 273 spin_lock(&osb->osb_lock); 274 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 275 "Recovery", 276 (osb->recovery_thread_task ? 277 task_pid_nr(osb->recovery_thread_task) : -1)); 278 if (rm->rm_used == 0) 279 out += snprintf(buf + out, len - out, " None\n"); 280 else { 281 for (i = 0; i < rm->rm_used; i++) 282 out += snprintf(buf + out, len - out, " %d", 283 rm->rm_entries[i]); 284 out += snprintf(buf + out, len - out, "\n"); 285 } 286 spin_unlock(&osb->osb_lock); 287 288 out += snprintf(buf + out, len - out, 289 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 291 osb->osb_commit_interval, 292 atomic_read(&osb->needs_checkpoint)); 293 294 out += snprintf(buf + out, len - out, 295 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 296 "Journal", osb->journal->j_state, 297 osb->journal->j_trans_id, 298 atomic_read(&osb->journal->j_num_trans)); 299 300 out += snprintf(buf + out, len - out, 301 "%10s => GlobalAllocs: %d LocalAllocs: %d " 302 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 303 "Stats", 304 atomic_read(&osb->alloc_stats.bitmap_data), 305 atomic_read(&osb->alloc_stats.local_data), 306 atomic_read(&osb->alloc_stats.bg_allocs), 307 atomic_read(&osb->alloc_stats.moves), 308 atomic_read(&osb->alloc_stats.bg_extends)); 309 310 out += snprintf(buf + out, len - out, 311 "%10s => State: %u Descriptor: %llu Size: %u bits " 312 "Default: %u bits\n", 313 "LocalAlloc", osb->local_alloc_state, 314 (unsigned long long)osb->la_last_gd, 315 osb->local_alloc_bits, osb->local_alloc_default_bits); 316 317 spin_lock(&osb->osb_lock); 318 out += snprintf(buf + out, len - out, 319 "%10s => InodeSlot: %d StolenInodes: %d, " 320 "MetaSlot: %d StolenMeta: %d\n", "Steal", 321 osb->s_inode_steal_slot, 322 atomic_read(&osb->s_num_inodes_stolen), 323 osb->s_meta_steal_slot, 324 atomic_read(&osb->s_num_meta_stolen)); 325 spin_unlock(&osb->osb_lock); 326 327 out += snprintf(buf + out, len - out, "OrphanScan => "); 328 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 329 os->os_count, os->os_seqno); 330 out += snprintf(buf + out, len - out, " Last Scan: "); 331 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 332 out += snprintf(buf + out, len - out, "Disabled\n"); 333 else 334 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 335 (get_seconds() - os->os_scantime.tv_sec)); 336 337 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 338 "Slots", "Num", "RecoGen"); 339 for (i = 0; i < osb->max_slots; ++i) { 340 out += snprintf(buf + out, len - out, 341 "%10s %c %3d %10d\n", 342 " ", 343 (i == osb->slot_num ? '*' : ' '), 344 i, osb->slot_recovery_generations[i]); 345 } 346 347 return out; 348 } 349 350 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 351 { 352 struct ocfs2_super *osb = inode->i_private; 353 char *buf = NULL; 354 355 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 356 if (!buf) 357 goto bail; 358 359 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 360 361 file->private_data = buf; 362 363 return 0; 364 bail: 365 return -ENOMEM; 366 } 367 368 static int ocfs2_debug_release(struct inode *inode, struct file *file) 369 { 370 kfree(file->private_data); 371 return 0; 372 } 373 374 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 375 size_t nbytes, loff_t *ppos) 376 { 377 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 378 i_size_read(file->f_mapping->host)); 379 } 380 #else 381 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 382 { 383 return 0; 384 } 385 static int ocfs2_debug_release(struct inode *inode, struct file *file) 386 { 387 return 0; 388 } 389 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 390 size_t nbytes, loff_t *ppos) 391 { 392 return 0; 393 } 394 #endif /* CONFIG_DEBUG_FS */ 395 396 static const struct file_operations ocfs2_osb_debug_fops = { 397 .open = ocfs2_osb_debug_open, 398 .release = ocfs2_debug_release, 399 .read = ocfs2_debug_read, 400 .llseek = generic_file_llseek, 401 }; 402 403 static int ocfs2_sync_fs(struct super_block *sb, int wait) 404 { 405 int status; 406 tid_t target; 407 struct ocfs2_super *osb = OCFS2_SB(sb); 408 409 if (ocfs2_is_hard_readonly(osb)) 410 return -EROFS; 411 412 if (wait) { 413 status = ocfs2_flush_truncate_log(osb); 414 if (status < 0) 415 mlog_errno(status); 416 } else { 417 ocfs2_schedule_truncate_log_flush(osb, 0); 418 } 419 420 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 421 &target)) { 422 if (wait) 423 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 424 target); 425 } 426 return 0; 427 } 428 429 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 430 { 431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 432 && (ino == USER_QUOTA_SYSTEM_INODE 433 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 434 return 0; 435 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 436 && (ino == GROUP_QUOTA_SYSTEM_INODE 437 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 438 return 0; 439 return 1; 440 } 441 442 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 443 { 444 struct inode *new = NULL; 445 int status = 0; 446 int i; 447 448 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 449 if (IS_ERR(new)) { 450 status = PTR_ERR(new); 451 mlog_errno(status); 452 goto bail; 453 } 454 osb->root_inode = new; 455 456 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 457 if (IS_ERR(new)) { 458 status = PTR_ERR(new); 459 mlog_errno(status); 460 goto bail; 461 } 462 osb->sys_root_inode = new; 463 464 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 465 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 466 if (!ocfs2_need_system_inode(osb, i)) 467 continue; 468 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 469 if (!new) { 470 ocfs2_release_system_inodes(osb); 471 status = -EINVAL; 472 mlog_errno(status); 473 /* FIXME: Should ERROR_RO_FS */ 474 mlog(ML_ERROR, "Unable to load system inode %d, " 475 "possibly corrupt fs?", i); 476 goto bail; 477 } 478 // the array now has one ref, so drop this one 479 iput(new); 480 } 481 482 bail: 483 if (status) 484 mlog_errno(status); 485 return status; 486 } 487 488 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 489 { 490 struct inode *new = NULL; 491 int status = 0; 492 int i; 493 494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 495 i < NUM_SYSTEM_INODES; 496 i++) { 497 if (!ocfs2_need_system_inode(osb, i)) 498 continue; 499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 500 if (!new) { 501 ocfs2_release_system_inodes(osb); 502 status = -EINVAL; 503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 504 status, i, osb->slot_num); 505 goto bail; 506 } 507 /* the array now has one ref, so drop this one */ 508 iput(new); 509 } 510 511 bail: 512 if (status) 513 mlog_errno(status); 514 return status; 515 } 516 517 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 518 { 519 int i; 520 struct inode *inode; 521 522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 523 inode = osb->global_system_inodes[i]; 524 if (inode) { 525 iput(inode); 526 osb->global_system_inodes[i] = NULL; 527 } 528 } 529 530 inode = osb->sys_root_inode; 531 if (inode) { 532 iput(inode); 533 osb->sys_root_inode = NULL; 534 } 535 536 inode = osb->root_inode; 537 if (inode) { 538 iput(inode); 539 osb->root_inode = NULL; 540 } 541 542 if (!osb->local_system_inodes) 543 return; 544 545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 546 if (osb->local_system_inodes[i]) { 547 iput(osb->local_system_inodes[i]); 548 osb->local_system_inodes[i] = NULL; 549 } 550 } 551 552 kfree(osb->local_system_inodes); 553 osb->local_system_inodes = NULL; 554 } 555 556 /* We're allocating fs objects, use GFP_NOFS */ 557 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 558 { 559 struct ocfs2_inode_info *oi; 560 561 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 562 if (!oi) 563 return NULL; 564 565 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 566 return &oi->vfs_inode; 567 } 568 569 static void ocfs2_i_callback(struct rcu_head *head) 570 { 571 struct inode *inode = container_of(head, struct inode, i_rcu); 572 INIT_LIST_HEAD(&inode->i_dentry); 573 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 574 } 575 576 static void ocfs2_destroy_inode(struct inode *inode) 577 { 578 call_rcu(&inode->i_rcu, ocfs2_i_callback); 579 } 580 581 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 582 unsigned int cbits) 583 { 584 unsigned int bytes = 1 << cbits; 585 unsigned int trim = bytes; 586 unsigned int bitshift = 32; 587 588 /* 589 * i_size and all block offsets in ocfs2 are always 64 bits 590 * wide. i_clusters is 32 bits, in cluster-sized units. So on 591 * 64 bit platforms, cluster size will be the limiting factor. 592 */ 593 594 #if BITS_PER_LONG == 32 595 # if defined(CONFIG_LBDAF) 596 BUILD_BUG_ON(sizeof(sector_t) != 8); 597 /* 598 * We might be limited by page cache size. 599 */ 600 if (bytes > PAGE_CACHE_SIZE) { 601 bytes = PAGE_CACHE_SIZE; 602 trim = 1; 603 /* 604 * Shift by 31 here so that we don't get larger than 605 * MAX_LFS_FILESIZE 606 */ 607 bitshift = 31; 608 } 609 # else 610 /* 611 * We are limited by the size of sector_t. Use block size, as 612 * that's what we expose to the VFS. 613 */ 614 bytes = 1 << bbits; 615 trim = 1; 616 bitshift = 31; 617 # endif 618 #endif 619 620 /* 621 * Trim by a whole cluster when we can actually approach the 622 * on-disk limits. Otherwise we can overflow i_clusters when 623 * an extent start is at the max offset. 624 */ 625 return (((unsigned long long)bytes) << bitshift) - trim; 626 } 627 628 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 629 { 630 int incompat_features; 631 int ret = 0; 632 struct mount_options parsed_options; 633 struct ocfs2_super *osb = OCFS2_SB(sb); 634 u32 tmp; 635 636 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 637 !ocfs2_check_set_options(sb, &parsed_options)) { 638 ret = -EINVAL; 639 goto out; 640 } 641 642 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 643 OCFS2_MOUNT_HB_NONE; 644 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 645 ret = -EINVAL; 646 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 647 goto out; 648 } 649 650 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 651 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 652 ret = -EINVAL; 653 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 654 goto out; 655 } 656 657 /* Probably don't want this on remount; it might 658 * mess with other nodes */ 659 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 660 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 661 ret = -EINVAL; 662 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 663 goto out; 664 } 665 666 /* We're going to/from readonly mode. */ 667 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 668 /* Disable quota accounting before remounting RO */ 669 if (*flags & MS_RDONLY) { 670 ret = ocfs2_susp_quotas(osb, 0); 671 if (ret < 0) 672 goto out; 673 } 674 /* Lock here so the check of HARD_RO and the potential 675 * setting of SOFT_RO is atomic. */ 676 spin_lock(&osb->osb_lock); 677 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 678 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 679 ret = -EROFS; 680 goto unlock_osb; 681 } 682 683 if (*flags & MS_RDONLY) { 684 sb->s_flags |= MS_RDONLY; 685 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 686 } else { 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 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 705 unlock_osb: 706 spin_unlock(&osb->osb_lock); 707 /* Enable quota accounting after remounting RW */ 708 if (!ret && !(*flags & MS_RDONLY)) { 709 if (sb_any_quota_suspended(sb)) 710 ret = ocfs2_susp_quotas(osb, 1); 711 else 712 ret = ocfs2_enable_quotas(osb); 713 if (ret < 0) { 714 /* Return back changes... */ 715 spin_lock(&osb->osb_lock); 716 sb->s_flags |= MS_RDONLY; 717 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 718 spin_unlock(&osb->osb_lock); 719 goto out; 720 } 721 } 722 } 723 724 if (!ret) { 725 /* Only save off the new mount options in case of a successful 726 * remount. */ 727 osb->s_mount_opt = parsed_options.mount_opt; 728 osb->s_atime_quantum = parsed_options.atime_quantum; 729 osb->preferred_slot = parsed_options.slot; 730 if (parsed_options.commit_interval) 731 osb->osb_commit_interval = parsed_options.commit_interval; 732 733 if (!ocfs2_is_hard_readonly(osb)) 734 ocfs2_set_journal_params(osb); 735 736 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 737 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 738 MS_POSIXACL : 0); 739 } 740 out: 741 return ret; 742 } 743 744 static int ocfs2_sb_probe(struct super_block *sb, 745 struct buffer_head **bh, 746 int *sector_size, 747 struct ocfs2_blockcheck_stats *stats) 748 { 749 int status, tmpstat; 750 struct ocfs1_vol_disk_hdr *hdr; 751 struct ocfs2_dinode *di; 752 int blksize; 753 754 *bh = NULL; 755 756 /* may be > 512 */ 757 *sector_size = bdev_logical_block_size(sb->s_bdev); 758 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 759 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 760 *sector_size, OCFS2_MAX_BLOCKSIZE); 761 status = -EINVAL; 762 goto bail; 763 } 764 765 /* Can this really happen? */ 766 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 767 *sector_size = OCFS2_MIN_BLOCKSIZE; 768 769 /* check block zero for old format */ 770 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 771 if (status < 0) { 772 mlog_errno(status); 773 goto bail; 774 } 775 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 776 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 777 mlog(ML_ERROR, "incompatible version: %u.%u\n", 778 hdr->major_version, hdr->minor_version); 779 status = -EINVAL; 780 } 781 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 782 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 783 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 784 hdr->signature); 785 status = -EINVAL; 786 } 787 brelse(*bh); 788 *bh = NULL; 789 if (status < 0) { 790 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 791 "upgraded before mounting with ocfs v2\n"); 792 goto bail; 793 } 794 795 /* 796 * Now check at magic offset for 512, 1024, 2048, 4096 797 * blocksizes. 4096 is the maximum blocksize because it is 798 * the minimum clustersize. 799 */ 800 status = -EINVAL; 801 for (blksize = *sector_size; 802 blksize <= OCFS2_MAX_BLOCKSIZE; 803 blksize <<= 1) { 804 tmpstat = ocfs2_get_sector(sb, bh, 805 OCFS2_SUPER_BLOCK_BLKNO, 806 blksize); 807 if (tmpstat < 0) { 808 status = tmpstat; 809 mlog_errno(status); 810 break; 811 } 812 di = (struct ocfs2_dinode *) (*bh)->b_data; 813 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 814 spin_lock_init(&stats->b_lock); 815 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 816 if (tmpstat < 0) { 817 brelse(*bh); 818 *bh = NULL; 819 } 820 if (tmpstat != -EAGAIN) { 821 status = tmpstat; 822 break; 823 } 824 } 825 826 bail: 827 return status; 828 } 829 830 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 831 { 832 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 833 834 if (osb->s_mount_opt & hb_enabled) { 835 if (ocfs2_mount_local(osb)) { 836 mlog(ML_ERROR, "Cannot heartbeat on a locally " 837 "mounted device.\n"); 838 return -EINVAL; 839 } 840 if (ocfs2_userspace_stack(osb)) { 841 mlog(ML_ERROR, "Userspace stack expected, but " 842 "o2cb heartbeat arguments passed to mount\n"); 843 return -EINVAL; 844 } 845 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 846 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 847 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 848 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 849 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 850 return -EINVAL; 851 } 852 } 853 854 if (!(osb->s_mount_opt & hb_enabled)) { 855 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 856 !ocfs2_userspace_stack(osb)) { 857 mlog(ML_ERROR, "Heartbeat has to be started to mount " 858 "a read-write clustered device.\n"); 859 return -EINVAL; 860 } 861 } 862 863 return 0; 864 } 865 866 /* 867 * If we're using a userspace stack, mount should have passed 868 * a name that matches the disk. If not, mount should not 869 * have passed a stack. 870 */ 871 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 872 struct mount_options *mopt) 873 { 874 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 875 mlog(ML_ERROR, 876 "cluster stack passed to mount, but this filesystem " 877 "does not support it\n"); 878 return -EINVAL; 879 } 880 881 if (ocfs2_userspace_stack(osb) && 882 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 883 OCFS2_STACK_LABEL_LEN)) { 884 mlog(ML_ERROR, 885 "cluster stack passed to mount (\"%s\") does not " 886 "match the filesystem (\"%s\")\n", 887 mopt->cluster_stack, 888 osb->osb_cluster_stack); 889 return -EINVAL; 890 } 891 892 return 0; 893 } 894 895 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 896 { 897 int type; 898 struct super_block *sb = osb->sb; 899 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 900 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 901 int status = 0; 902 903 for (type = 0; type < MAXQUOTAS; type++) { 904 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 905 continue; 906 if (unsuspend) 907 status = dquot_resume(sb, type); 908 else { 909 struct ocfs2_mem_dqinfo *oinfo; 910 911 /* Cancel periodic syncing before suspending */ 912 oinfo = sb_dqinfo(sb, type)->dqi_priv; 913 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 914 status = dquot_suspend(sb, type); 915 } 916 if (status < 0) 917 break; 918 } 919 if (status < 0) 920 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 921 "remount (error = %d).\n", status); 922 return status; 923 } 924 925 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 926 { 927 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 928 struct super_block *sb = osb->sb; 929 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 930 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 931 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 932 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 933 int status; 934 int type; 935 936 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 937 for (type = 0; type < MAXQUOTAS; type++) { 938 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 939 continue; 940 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 941 osb->slot_num); 942 if (!inode[type]) { 943 status = -ENOENT; 944 goto out_quota_off; 945 } 946 status = dquot_enable(inode[type], type, QFMT_OCFS2, 947 DQUOT_USAGE_ENABLED); 948 if (status < 0) 949 goto out_quota_off; 950 } 951 952 for (type = 0; type < MAXQUOTAS; type++) 953 iput(inode[type]); 954 return 0; 955 out_quota_off: 956 ocfs2_disable_quotas(osb); 957 for (type = 0; type < MAXQUOTAS; type++) 958 iput(inode[type]); 959 mlog_errno(status); 960 return status; 961 } 962 963 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 964 { 965 int type; 966 struct inode *inode; 967 struct super_block *sb = osb->sb; 968 struct ocfs2_mem_dqinfo *oinfo; 969 970 /* We mostly ignore errors in this function because there's not much 971 * we can do when we see them */ 972 for (type = 0; type < MAXQUOTAS; type++) { 973 if (!sb_has_quota_loaded(sb, type)) 974 continue; 975 /* Cancel periodic syncing before we grab dqonoff_mutex */ 976 oinfo = sb_dqinfo(sb, type)->dqi_priv; 977 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 978 inode = igrab(sb->s_dquot.files[type]); 979 /* Turn off quotas. This will remove all dquot structures from 980 * memory and so they will be automatically synced to global 981 * quota files */ 982 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 983 DQUOT_LIMITS_ENABLED); 984 if (!inode) 985 continue; 986 iput(inode); 987 } 988 } 989 990 /* Handle quota on quotactl */ 991 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id) 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_meta = 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 trace_ocfs2_fill_super(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 | MS_NOSEC)) | 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 "ocfs2: Readonly device (%s) detected. " 1112 "Cluster services will not be used for this mount. " 1113 "Recovery will be skipped.\n", osb->dev_str); 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 return status; 1207 } 1208 } 1209 1210 ocfs2_complete_quota_recovery(osb); 1211 1212 /* Now we wake up again for processes waiting for quotas */ 1213 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1214 wake_up(&osb->osb_mount_event); 1215 1216 /* Start this when the mount is almost sure of being successful */ 1217 ocfs2_orphan_scan_start(osb); 1218 1219 return status; 1220 1221 read_super_error: 1222 brelse(bh); 1223 1224 if (inode) 1225 iput(inode); 1226 1227 if (osb) { 1228 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1229 wake_up(&osb->osb_mount_event); 1230 ocfs2_dismount_volume(sb, 1); 1231 } 1232 1233 if (status) 1234 mlog_errno(status); 1235 return status; 1236 } 1237 1238 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1239 int flags, 1240 const char *dev_name, 1241 void *data) 1242 { 1243 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1244 } 1245 1246 static void ocfs2_kill_sb(struct super_block *sb) 1247 { 1248 struct ocfs2_super *osb = OCFS2_SB(sb); 1249 1250 /* Failed mount? */ 1251 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1252 goto out; 1253 1254 /* Prevent further queueing of inode drop events */ 1255 spin_lock(&dentry_list_lock); 1256 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1257 spin_unlock(&dentry_list_lock); 1258 /* Wait for work to finish and/or remove it */ 1259 cancel_work_sync(&osb->dentry_lock_work); 1260 out: 1261 kill_block_super(sb); 1262 } 1263 1264 static struct file_system_type ocfs2_fs_type = { 1265 .owner = THIS_MODULE, 1266 .name = "ocfs2", 1267 .mount = ocfs2_mount, 1268 .kill_sb = ocfs2_kill_sb, 1269 1270 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1271 .next = NULL 1272 }; 1273 1274 static int ocfs2_check_set_options(struct super_block *sb, 1275 struct mount_options *options) 1276 { 1277 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1278 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1279 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1280 mlog(ML_ERROR, "User quotas were requested, but this " 1281 "filesystem does not have the feature enabled.\n"); 1282 return 0; 1283 } 1284 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1285 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1286 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1287 mlog(ML_ERROR, "Group 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_POSIX_ACL && 1292 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1293 mlog(ML_ERROR, "ACL support requested but extended attributes " 1294 "feature is not enabled\n"); 1295 return 0; 1296 } 1297 /* No ACL setting specified? Use XATTR feature... */ 1298 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1299 OCFS2_MOUNT_NO_POSIX_ACL))) { 1300 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1301 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1302 else 1303 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1304 } 1305 return 1; 1306 } 1307 1308 static int ocfs2_parse_options(struct super_block *sb, 1309 char *options, 1310 struct mount_options *mopt, 1311 int is_remount) 1312 { 1313 int status, user_stack = 0; 1314 char *p; 1315 u32 tmp; 1316 1317 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1318 1319 mopt->commit_interval = 0; 1320 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1321 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1322 mopt->slot = OCFS2_INVALID_SLOT; 1323 mopt->localalloc_opt = -1; 1324 mopt->cluster_stack[0] = '\0'; 1325 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1326 mopt->dir_resv_level = -1; 1327 1328 if (!options) { 1329 status = 1; 1330 goto bail; 1331 } 1332 1333 while ((p = strsep(&options, ",")) != NULL) { 1334 int token, option; 1335 substring_t args[MAX_OPT_ARGS]; 1336 1337 if (!*p) 1338 continue; 1339 1340 token = match_token(p, tokens, args); 1341 switch (token) { 1342 case Opt_hb_local: 1343 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1344 break; 1345 case Opt_hb_none: 1346 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1347 break; 1348 case Opt_hb_global: 1349 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1350 break; 1351 case Opt_barrier: 1352 if (match_int(&args[0], &option)) { 1353 status = 0; 1354 goto bail; 1355 } 1356 if (option) 1357 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1358 else 1359 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1360 break; 1361 case Opt_intr: 1362 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1363 break; 1364 case Opt_nointr: 1365 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1366 break; 1367 case Opt_err_panic: 1368 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1369 break; 1370 case Opt_err_ro: 1371 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1372 break; 1373 case Opt_data_ordered: 1374 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1375 break; 1376 case Opt_data_writeback: 1377 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1378 break; 1379 case Opt_user_xattr: 1380 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1381 break; 1382 case Opt_nouser_xattr: 1383 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1384 break; 1385 case Opt_atime_quantum: 1386 if (match_int(&args[0], &option)) { 1387 status = 0; 1388 goto bail; 1389 } 1390 if (option >= 0) 1391 mopt->atime_quantum = option; 1392 break; 1393 case Opt_slot: 1394 option = 0; 1395 if (match_int(&args[0], &option)) { 1396 status = 0; 1397 goto bail; 1398 } 1399 if (option) 1400 mopt->slot = (s16)option; 1401 break; 1402 case Opt_commit: 1403 option = 0; 1404 if (match_int(&args[0], &option)) { 1405 status = 0; 1406 goto bail; 1407 } 1408 if (option < 0) 1409 return 0; 1410 if (option == 0) 1411 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1412 mopt->commit_interval = HZ * option; 1413 break; 1414 case Opt_localalloc: 1415 option = 0; 1416 if (match_int(&args[0], &option)) { 1417 status = 0; 1418 goto bail; 1419 } 1420 if (option >= 0) 1421 mopt->localalloc_opt = option; 1422 break; 1423 case Opt_localflocks: 1424 /* 1425 * Changing this during remount could race 1426 * flock() requests, or "unbalance" existing 1427 * ones (e.g., a lock is taken in one mode but 1428 * dropped in the other). If users care enough 1429 * to flip locking modes during remount, we 1430 * could add a "local" flag to individual 1431 * flock structures for proper tracking of 1432 * state. 1433 */ 1434 if (!is_remount) 1435 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1436 break; 1437 case Opt_stack: 1438 /* Check both that the option we were passed 1439 * is of the right length and that it is a proper 1440 * string of the right length. 1441 */ 1442 if (((args[0].to - args[0].from) != 1443 OCFS2_STACK_LABEL_LEN) || 1444 (strnlen(args[0].from, 1445 OCFS2_STACK_LABEL_LEN) != 1446 OCFS2_STACK_LABEL_LEN)) { 1447 mlog(ML_ERROR, 1448 "Invalid cluster_stack option\n"); 1449 status = 0; 1450 goto bail; 1451 } 1452 memcpy(mopt->cluster_stack, args[0].from, 1453 OCFS2_STACK_LABEL_LEN); 1454 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1455 /* 1456 * Open code the memcmp here as we don't have 1457 * an osb to pass to 1458 * ocfs2_userspace_stack(). 1459 */ 1460 if (memcmp(mopt->cluster_stack, 1461 OCFS2_CLASSIC_CLUSTER_STACK, 1462 OCFS2_STACK_LABEL_LEN)) 1463 user_stack = 1; 1464 break; 1465 case Opt_inode64: 1466 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1467 break; 1468 case Opt_usrquota: 1469 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1470 break; 1471 case Opt_grpquota: 1472 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1473 break; 1474 case Opt_coherency_buffered: 1475 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1476 break; 1477 case Opt_coherency_full: 1478 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1479 break; 1480 case Opt_acl: 1481 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1482 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1483 break; 1484 case Opt_noacl: 1485 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1486 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1487 break; 1488 case Opt_resv_level: 1489 if (is_remount) 1490 break; 1491 if (match_int(&args[0], &option)) { 1492 status = 0; 1493 goto bail; 1494 } 1495 if (option >= OCFS2_MIN_RESV_LEVEL && 1496 option < OCFS2_MAX_RESV_LEVEL) 1497 mopt->resv_level = option; 1498 break; 1499 case Opt_dir_resv_level: 1500 if (is_remount) 1501 break; 1502 if (match_int(&args[0], &option)) { 1503 status = 0; 1504 goto bail; 1505 } 1506 if (option >= OCFS2_MIN_RESV_LEVEL && 1507 option < OCFS2_MAX_RESV_LEVEL) 1508 mopt->dir_resv_level = option; 1509 break; 1510 default: 1511 mlog(ML_ERROR, 1512 "Unrecognized mount option \"%s\" " 1513 "or missing value\n", p); 1514 status = 0; 1515 goto bail; 1516 } 1517 } 1518 1519 if (user_stack == 0) { 1520 /* Ensure only one heartbeat mode */ 1521 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1522 OCFS2_MOUNT_HB_GLOBAL | 1523 OCFS2_MOUNT_HB_NONE); 1524 if (hweight32(tmp) != 1) { 1525 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1526 status = 0; 1527 goto bail; 1528 } 1529 } 1530 1531 status = 1; 1532 1533 bail: 1534 return status; 1535 } 1536 1537 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1538 { 1539 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1540 unsigned long opts = osb->s_mount_opt; 1541 unsigned int local_alloc_megs; 1542 1543 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1544 seq_printf(s, ",_netdev"); 1545 if (opts & OCFS2_MOUNT_HB_LOCAL) 1546 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1547 else 1548 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1549 } else 1550 seq_printf(s, ",%s", OCFS2_HB_NONE); 1551 1552 if (opts & OCFS2_MOUNT_NOINTR) 1553 seq_printf(s, ",nointr"); 1554 1555 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1556 seq_printf(s, ",data=writeback"); 1557 else 1558 seq_printf(s, ",data=ordered"); 1559 1560 if (opts & OCFS2_MOUNT_BARRIER) 1561 seq_printf(s, ",barrier=1"); 1562 1563 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1564 seq_printf(s, ",errors=panic"); 1565 else 1566 seq_printf(s, ",errors=remount-ro"); 1567 1568 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1569 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1570 1571 if (!(mnt->mnt_flags & MNT_NOATIME) && !(mnt->mnt_flags & MNT_RELATIME)) 1572 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1573 1574 if (osb->osb_commit_interval) 1575 seq_printf(s, ",commit=%u", 1576 (unsigned) (osb->osb_commit_interval / HZ)); 1577 1578 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1579 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1580 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1581 1582 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1583 seq_printf(s, ",localflocks,"); 1584 1585 if (osb->osb_cluster_stack[0]) 1586 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1587 osb->osb_cluster_stack); 1588 if (opts & OCFS2_MOUNT_USRQUOTA) 1589 seq_printf(s, ",usrquota"); 1590 if (opts & OCFS2_MOUNT_GRPQUOTA) 1591 seq_printf(s, ",grpquota"); 1592 1593 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1594 seq_printf(s, ",coherency=buffered"); 1595 else 1596 seq_printf(s, ",coherency=full"); 1597 1598 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1599 seq_printf(s, ",nouser_xattr"); 1600 else 1601 seq_printf(s, ",user_xattr"); 1602 1603 if (opts & OCFS2_MOUNT_INODE64) 1604 seq_printf(s, ",inode64"); 1605 1606 if (opts & OCFS2_MOUNT_POSIX_ACL) 1607 seq_printf(s, ",acl"); 1608 else 1609 seq_printf(s, ",noacl"); 1610 1611 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1612 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1613 1614 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1615 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1616 1617 return 0; 1618 } 1619 1620 wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; 1621 1622 static int __init ocfs2_init(void) 1623 { 1624 int status, i; 1625 1626 ocfs2_print_version(); 1627 1628 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++) 1629 init_waitqueue_head(&ocfs2__ioend_wq[i]); 1630 1631 status = init_ocfs2_uptodate_cache(); 1632 if (status < 0) { 1633 mlog_errno(status); 1634 goto leave; 1635 } 1636 1637 status = ocfs2_initialize_mem_caches(); 1638 if (status < 0) { 1639 mlog_errno(status); 1640 goto leave; 1641 } 1642 1643 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1644 if (!ocfs2_wq) { 1645 status = -ENOMEM; 1646 goto leave; 1647 } 1648 1649 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1650 if (!ocfs2_debugfs_root) { 1651 status = -EFAULT; 1652 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1653 } 1654 1655 ocfs2_set_locking_protocol(); 1656 1657 status = register_quota_format(&ocfs2_quota_format); 1658 leave: 1659 if (status < 0) { 1660 ocfs2_free_mem_caches(); 1661 exit_ocfs2_uptodate_cache(); 1662 mlog_errno(status); 1663 } 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 if (ocfs2_wq) { 1674 flush_workqueue(ocfs2_wq); 1675 destroy_workqueue(ocfs2_wq); 1676 } 1677 1678 unregister_quota_format(&ocfs2_quota_format); 1679 1680 debugfs_remove(ocfs2_debugfs_root); 1681 1682 ocfs2_free_mem_caches(); 1683 1684 unregister_filesystem(&ocfs2_fs_type); 1685 1686 exit_ocfs2_uptodate_cache(); 1687 } 1688 1689 static void ocfs2_put_super(struct super_block *sb) 1690 { 1691 trace_ocfs2_put_super(sb); 1692 1693 ocfs2_sync_blockdev(sb); 1694 ocfs2_dismount_volume(sb, 0); 1695 } 1696 1697 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1698 { 1699 struct ocfs2_super *osb; 1700 u32 numbits, freebits; 1701 int status; 1702 struct ocfs2_dinode *bm_lock; 1703 struct buffer_head *bh = NULL; 1704 struct inode *inode = NULL; 1705 1706 trace_ocfs2_statfs(dentry->d_sb, buf); 1707 1708 osb = OCFS2_SB(dentry->d_sb); 1709 1710 inode = ocfs2_get_system_file_inode(osb, 1711 GLOBAL_BITMAP_SYSTEM_INODE, 1712 OCFS2_INVALID_SLOT); 1713 if (!inode) { 1714 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1715 status = -EIO; 1716 goto bail; 1717 } 1718 1719 status = ocfs2_inode_lock(inode, &bh, 0); 1720 if (status < 0) { 1721 mlog_errno(status); 1722 goto bail; 1723 } 1724 1725 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1726 1727 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1728 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1729 1730 buf->f_type = OCFS2_SUPER_MAGIC; 1731 buf->f_bsize = dentry->d_sb->s_blocksize; 1732 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1733 buf->f_blocks = ((sector_t) numbits) * 1734 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1735 buf->f_bfree = ((sector_t) freebits) * 1736 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1737 buf->f_bavail = buf->f_bfree; 1738 buf->f_files = numbits; 1739 buf->f_ffree = freebits; 1740 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1741 & 0xFFFFFFFFUL; 1742 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1743 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1744 1745 brelse(bh); 1746 1747 ocfs2_inode_unlock(inode, 0); 1748 status = 0; 1749 bail: 1750 if (inode) 1751 iput(inode); 1752 1753 if (status) 1754 mlog_errno(status); 1755 1756 return status; 1757 } 1758 1759 static void ocfs2_inode_init_once(void *data) 1760 { 1761 struct ocfs2_inode_info *oi = data; 1762 1763 oi->ip_flags = 0; 1764 oi->ip_open_count = 0; 1765 spin_lock_init(&oi->ip_lock); 1766 ocfs2_extent_map_init(&oi->vfs_inode); 1767 INIT_LIST_HEAD(&oi->ip_io_markers); 1768 oi->ip_dir_start_lookup = 0; 1769 atomic_set(&oi->ip_unaligned_aio, 0); 1770 init_rwsem(&oi->ip_alloc_sem); 1771 init_rwsem(&oi->ip_xattr_sem); 1772 mutex_init(&oi->ip_io_mutex); 1773 1774 oi->ip_blkno = 0ULL; 1775 oi->ip_clusters = 0; 1776 1777 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1778 1779 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1780 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1781 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1782 1783 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1784 &ocfs2_inode_caching_ops); 1785 1786 inode_init_once(&oi->vfs_inode); 1787 } 1788 1789 static int ocfs2_initialize_mem_caches(void) 1790 { 1791 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1792 sizeof(struct ocfs2_inode_info), 1793 0, 1794 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1795 SLAB_MEM_SPREAD), 1796 ocfs2_inode_init_once); 1797 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1798 sizeof(struct ocfs2_dquot), 1799 0, 1800 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1801 SLAB_MEM_SPREAD), 1802 NULL); 1803 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1804 sizeof(struct ocfs2_quota_chunk), 1805 0, 1806 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1807 NULL); 1808 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1809 !ocfs2_qf_chunk_cachep) { 1810 if (ocfs2_inode_cachep) 1811 kmem_cache_destroy(ocfs2_inode_cachep); 1812 if (ocfs2_dquot_cachep) 1813 kmem_cache_destroy(ocfs2_dquot_cachep); 1814 if (ocfs2_qf_chunk_cachep) 1815 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1816 return -ENOMEM; 1817 } 1818 1819 return 0; 1820 } 1821 1822 static void ocfs2_free_mem_caches(void) 1823 { 1824 if (ocfs2_inode_cachep) 1825 kmem_cache_destroy(ocfs2_inode_cachep); 1826 ocfs2_inode_cachep = NULL; 1827 1828 if (ocfs2_dquot_cachep) 1829 kmem_cache_destroy(ocfs2_dquot_cachep); 1830 ocfs2_dquot_cachep = NULL; 1831 1832 if (ocfs2_qf_chunk_cachep) 1833 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1834 ocfs2_qf_chunk_cachep = NULL; 1835 } 1836 1837 static int ocfs2_get_sector(struct super_block *sb, 1838 struct buffer_head **bh, 1839 int block, 1840 int sect_size) 1841 { 1842 if (!sb_set_blocksize(sb, sect_size)) { 1843 mlog(ML_ERROR, "unable to set blocksize\n"); 1844 return -EIO; 1845 } 1846 1847 *bh = sb_getblk(sb, block); 1848 if (!*bh) { 1849 mlog_errno(-EIO); 1850 return -EIO; 1851 } 1852 lock_buffer(*bh); 1853 if (!buffer_dirty(*bh)) 1854 clear_buffer_uptodate(*bh); 1855 unlock_buffer(*bh); 1856 ll_rw_block(READ, 1, bh); 1857 wait_on_buffer(*bh); 1858 if (!buffer_uptodate(*bh)) { 1859 mlog_errno(-EIO); 1860 brelse(*bh); 1861 *bh = NULL; 1862 return -EIO; 1863 } 1864 1865 return 0; 1866 } 1867 1868 static int ocfs2_mount_volume(struct super_block *sb) 1869 { 1870 int status = 0; 1871 int unlock_super = 0; 1872 struct ocfs2_super *osb = OCFS2_SB(sb); 1873 1874 if (ocfs2_is_hard_readonly(osb)) 1875 goto leave; 1876 1877 status = ocfs2_dlm_init(osb); 1878 if (status < 0) { 1879 mlog_errno(status); 1880 goto leave; 1881 } 1882 1883 status = ocfs2_super_lock(osb, 1); 1884 if (status < 0) { 1885 mlog_errno(status); 1886 goto leave; 1887 } 1888 unlock_super = 1; 1889 1890 /* This will load up the node map and add ourselves to it. */ 1891 status = ocfs2_find_slot(osb); 1892 if (status < 0) { 1893 mlog_errno(status); 1894 goto leave; 1895 } 1896 1897 /* load all node-local system inodes */ 1898 status = ocfs2_init_local_system_inodes(osb); 1899 if (status < 0) { 1900 mlog_errno(status); 1901 goto leave; 1902 } 1903 1904 status = ocfs2_check_volume(osb); 1905 if (status < 0) { 1906 mlog_errno(status); 1907 goto leave; 1908 } 1909 1910 status = ocfs2_truncate_log_init(osb); 1911 if (status < 0) 1912 mlog_errno(status); 1913 1914 leave: 1915 if (unlock_super) 1916 ocfs2_super_unlock(osb, 1); 1917 1918 return status; 1919 } 1920 1921 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1922 { 1923 int tmp, hangup_needed = 0; 1924 struct ocfs2_super *osb = NULL; 1925 char nodestr[8]; 1926 1927 trace_ocfs2_dismount_volume(sb); 1928 1929 BUG_ON(!sb); 1930 osb = OCFS2_SB(sb); 1931 BUG_ON(!osb); 1932 1933 debugfs_remove(osb->osb_ctxt); 1934 1935 /* 1936 * Flush inode dropping work queue so that deletes are 1937 * performed while the filesystem is still working 1938 */ 1939 ocfs2_drop_all_dl_inodes(osb); 1940 1941 /* Orphan scan should be stopped as early as possible */ 1942 ocfs2_orphan_scan_stop(osb); 1943 1944 ocfs2_disable_quotas(osb); 1945 1946 ocfs2_shutdown_local_alloc(osb); 1947 1948 ocfs2_truncate_log_shutdown(osb); 1949 1950 /* This will disable recovery and flush any recovery work. */ 1951 ocfs2_recovery_exit(osb); 1952 1953 ocfs2_journal_shutdown(osb); 1954 1955 ocfs2_sync_blockdev(sb); 1956 1957 ocfs2_purge_refcount_trees(osb); 1958 1959 /* No cluster connection means we've failed during mount, so skip 1960 * all the steps which depended on that to complete. */ 1961 if (osb->cconn) { 1962 tmp = ocfs2_super_lock(osb, 1); 1963 if (tmp < 0) { 1964 mlog_errno(tmp); 1965 return; 1966 } 1967 } 1968 1969 if (osb->slot_num != OCFS2_INVALID_SLOT) 1970 ocfs2_put_slot(osb); 1971 1972 if (osb->cconn) 1973 ocfs2_super_unlock(osb, 1); 1974 1975 ocfs2_release_system_inodes(osb); 1976 1977 /* 1978 * If we're dismounting due to mount error, mount.ocfs2 will clean 1979 * up heartbeat. If we're a local mount, there is no heartbeat. 1980 * If we failed before we got a uuid_str yet, we can't stop 1981 * heartbeat. Otherwise, do it. 1982 */ 1983 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1984 !ocfs2_is_hard_readonly(osb)) 1985 hangup_needed = 1; 1986 1987 if (osb->cconn) 1988 ocfs2_dlm_shutdown(osb, hangup_needed); 1989 1990 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1991 debugfs_remove(osb->osb_debug_root); 1992 1993 if (hangup_needed) 1994 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1995 1996 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1997 1998 if (ocfs2_mount_local(osb)) 1999 snprintf(nodestr, sizeof(nodestr), "local"); 2000 else 2001 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 2002 2003 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 2004 osb->dev_str, nodestr); 2005 2006 ocfs2_delete_osb(osb); 2007 kfree(osb); 2008 sb->s_dev = 0; 2009 sb->s_fs_info = NULL; 2010 } 2011 2012 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 2013 unsigned uuid_bytes) 2014 { 2015 int i, ret; 2016 char *ptr; 2017 2018 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 2019 2020 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 2021 if (osb->uuid_str == NULL) 2022 return -ENOMEM; 2023 2024 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 2025 /* print with null */ 2026 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2027 if (ret != 2) /* drop super cleans up */ 2028 return -EINVAL; 2029 /* then only advance past the last char */ 2030 ptr += 2; 2031 } 2032 2033 return 0; 2034 } 2035 2036 /* Make sure entire volume is addressable by our journal. Requires 2037 osb_clusters_at_boot to be valid and for the journal to have been 2038 initialized by ocfs2_journal_init(). */ 2039 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2040 { 2041 int status = 0; 2042 u64 max_block = 2043 ocfs2_clusters_to_blocks(osb->sb, 2044 osb->osb_clusters_at_boot) - 1; 2045 2046 /* 32-bit block number is always OK. */ 2047 if (max_block <= (u32)~0ULL) 2048 goto out; 2049 2050 /* Volume is "huge", so see if our journal is new enough to 2051 support it. */ 2052 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2053 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2054 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2055 JBD2_FEATURE_INCOMPAT_64BIT))) { 2056 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2057 "Enable the 'block64' journal option with tunefs.ocfs2"); 2058 status = -EFBIG; 2059 goto out; 2060 } 2061 2062 out: 2063 return status; 2064 } 2065 2066 static int ocfs2_initialize_super(struct super_block *sb, 2067 struct buffer_head *bh, 2068 int sector_size, 2069 struct ocfs2_blockcheck_stats *stats) 2070 { 2071 int status; 2072 int i, cbits, bbits; 2073 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2074 struct inode *inode = NULL; 2075 struct ocfs2_journal *journal; 2076 __le32 uuid_net_key; 2077 struct ocfs2_super *osb; 2078 u64 total_blocks; 2079 2080 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2081 if (!osb) { 2082 status = -ENOMEM; 2083 mlog_errno(status); 2084 goto bail; 2085 } 2086 2087 sb->s_fs_info = osb; 2088 sb->s_op = &ocfs2_sops; 2089 sb->s_d_op = &ocfs2_dentry_ops; 2090 sb->s_export_op = &ocfs2_export_ops; 2091 sb->s_qcop = &ocfs2_quotactl_ops; 2092 sb->dq_op = &ocfs2_quota_operations; 2093 sb->s_xattr = ocfs2_xattr_handlers; 2094 sb->s_time_gran = 1; 2095 sb->s_flags |= MS_NOATIME; 2096 /* this is needed to support O_LARGEFILE */ 2097 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2098 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2099 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2100 2101 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2102 2103 for (i = 0; i < 3; i++) 2104 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2105 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2106 2107 osb->sb = sb; 2108 /* Save off for ocfs2_rw_direct */ 2109 osb->s_sectsize_bits = blksize_bits(sector_size); 2110 BUG_ON(!osb->s_sectsize_bits); 2111 2112 spin_lock_init(&osb->dc_task_lock); 2113 init_waitqueue_head(&osb->dc_event); 2114 osb->dc_work_sequence = 0; 2115 osb->dc_wake_sequence = 0; 2116 INIT_LIST_HEAD(&osb->blocked_lock_list); 2117 osb->blocked_lock_count = 0; 2118 spin_lock_init(&osb->osb_lock); 2119 spin_lock_init(&osb->osb_xattr_lock); 2120 ocfs2_init_steal_slots(osb); 2121 2122 atomic_set(&osb->alloc_stats.moves, 0); 2123 atomic_set(&osb->alloc_stats.local_data, 0); 2124 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2125 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2126 atomic_set(&osb->alloc_stats.bg_extends, 0); 2127 2128 /* Copy the blockcheck stats from the superblock probe */ 2129 osb->osb_ecc_stats = *stats; 2130 2131 ocfs2_init_node_maps(osb); 2132 2133 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2134 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2135 2136 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2137 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2138 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2139 osb->max_slots); 2140 status = -EINVAL; 2141 goto bail; 2142 } 2143 2144 ocfs2_orphan_scan_init(osb); 2145 2146 status = ocfs2_recovery_init(osb); 2147 if (status) { 2148 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2149 mlog_errno(status); 2150 goto bail; 2151 } 2152 2153 init_waitqueue_head(&osb->checkpoint_event); 2154 atomic_set(&osb->needs_checkpoint, 0); 2155 2156 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2157 2158 osb->slot_num = OCFS2_INVALID_SLOT; 2159 2160 osb->s_xattr_inline_size = le16_to_cpu( 2161 di->id2.i_super.s_xattr_inline_size); 2162 2163 osb->local_alloc_state = OCFS2_LA_UNUSED; 2164 osb->local_alloc_bh = NULL; 2165 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2166 2167 init_waitqueue_head(&osb->osb_mount_event); 2168 2169 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2170 if (status) { 2171 mlog_errno(status); 2172 goto bail; 2173 } 2174 2175 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2176 if (!osb->vol_label) { 2177 mlog(ML_ERROR, "unable to alloc vol label\n"); 2178 status = -ENOMEM; 2179 goto bail; 2180 } 2181 2182 osb->slot_recovery_generations = 2183 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2184 GFP_KERNEL); 2185 if (!osb->slot_recovery_generations) { 2186 status = -ENOMEM; 2187 mlog_errno(status); 2188 goto bail; 2189 } 2190 2191 init_waitqueue_head(&osb->osb_wipe_event); 2192 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2193 sizeof(*osb->osb_orphan_wipes), 2194 GFP_KERNEL); 2195 if (!osb->osb_orphan_wipes) { 2196 status = -ENOMEM; 2197 mlog_errno(status); 2198 goto bail; 2199 } 2200 2201 osb->osb_rf_lock_tree = RB_ROOT; 2202 2203 osb->s_feature_compat = 2204 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2205 osb->s_feature_ro_compat = 2206 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2207 osb->s_feature_incompat = 2208 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2209 2210 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2211 mlog(ML_ERROR, "couldn't mount because of unsupported " 2212 "optional features (%x).\n", i); 2213 status = -EINVAL; 2214 goto bail; 2215 } 2216 if (!(osb->sb->s_flags & MS_RDONLY) && 2217 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2218 mlog(ML_ERROR, "couldn't mount RDWR because of " 2219 "unsupported optional features (%x).\n", i); 2220 status = -EINVAL; 2221 goto bail; 2222 } 2223 2224 if (ocfs2_clusterinfo_valid(osb)) { 2225 osb->osb_stackflags = 2226 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2227 memcpy(osb->osb_cluster_stack, 2228 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2229 OCFS2_STACK_LABEL_LEN); 2230 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2231 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2232 mlog(ML_ERROR, 2233 "couldn't mount because of an invalid " 2234 "cluster stack label (%s) \n", 2235 osb->osb_cluster_stack); 2236 status = -EINVAL; 2237 goto bail; 2238 } 2239 } else { 2240 /* The empty string is identical with classic tools that 2241 * don't know about s_cluster_info. */ 2242 osb->osb_cluster_stack[0] = '\0'; 2243 } 2244 2245 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2246 2247 /* FIXME 2248 * This should be done in ocfs2_journal_init(), but unknown 2249 * ordering issues will cause the filesystem to crash. 2250 * If anyone wants to figure out what part of the code 2251 * refers to osb->journal before ocfs2_journal_init() is run, 2252 * be my guest. 2253 */ 2254 /* initialize our journal structure */ 2255 2256 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2257 if (!journal) { 2258 mlog(ML_ERROR, "unable to alloc journal\n"); 2259 status = -ENOMEM; 2260 goto bail; 2261 } 2262 osb->journal = journal; 2263 journal->j_osb = osb; 2264 2265 atomic_set(&journal->j_num_trans, 0); 2266 init_rwsem(&journal->j_trans_barrier); 2267 init_waitqueue_head(&journal->j_checkpointed); 2268 spin_lock_init(&journal->j_lock); 2269 journal->j_trans_id = (unsigned long) 1; 2270 INIT_LIST_HEAD(&journal->j_la_cleanups); 2271 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2272 journal->j_state = OCFS2_JOURNAL_FREE; 2273 2274 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2275 osb->dentry_lock_list = NULL; 2276 2277 /* get some pseudo constants for clustersize bits */ 2278 osb->s_clustersize_bits = 2279 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2280 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2281 2282 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2283 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2284 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2285 osb->s_clustersize); 2286 status = -EINVAL; 2287 goto bail; 2288 } 2289 2290 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2291 le32_to_cpu(di->i_clusters)); 2292 2293 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2294 total_blocks); 2295 if (status) { 2296 mlog(ML_ERROR, "Volume too large " 2297 "to mount safely on this system"); 2298 status = -EFBIG; 2299 goto bail; 2300 } 2301 2302 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2303 sizeof(di->id2.i_super.s_uuid))) { 2304 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2305 status = -ENOMEM; 2306 goto bail; 2307 } 2308 2309 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2310 2311 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2312 osb->vol_label[63] = '\0'; 2313 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2314 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2315 osb->first_cluster_group_blkno = 2316 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2317 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2318 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2319 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2320 (unsigned long long)osb->root_blkno, 2321 (unsigned long long)osb->system_dir_blkno, 2322 osb->s_clustersize_bits); 2323 2324 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2325 if (!osb->osb_dlm_debug) { 2326 status = -ENOMEM; 2327 mlog_errno(status); 2328 goto bail; 2329 } 2330 2331 atomic_set(&osb->vol_state, VOLUME_INIT); 2332 2333 /* load root, system_dir, and all global system inodes */ 2334 status = ocfs2_init_global_system_inodes(osb); 2335 if (status < 0) { 2336 mlog_errno(status); 2337 goto bail; 2338 } 2339 2340 /* 2341 * global bitmap 2342 */ 2343 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2344 OCFS2_INVALID_SLOT); 2345 if (!inode) { 2346 status = -EINVAL; 2347 mlog_errno(status); 2348 goto bail; 2349 } 2350 2351 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2352 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2353 iput(inode); 2354 2355 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2356 osb->s_feature_incompat) * 8; 2357 2358 status = ocfs2_init_slot_info(osb); 2359 if (status < 0) { 2360 mlog_errno(status); 2361 goto bail; 2362 } 2363 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb); 2364 2365 bail: 2366 return status; 2367 } 2368 2369 /* 2370 * will return: -EAGAIN if it is ok to keep searching for superblocks 2371 * -EINVAL if there is a bad superblock 2372 * 0 on success 2373 */ 2374 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2375 struct buffer_head *bh, 2376 u32 blksz, 2377 struct ocfs2_blockcheck_stats *stats) 2378 { 2379 int status = -EAGAIN; 2380 2381 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2382 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2383 /* We have to do a raw check of the feature here */ 2384 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2385 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2386 status = ocfs2_block_check_validate(bh->b_data, 2387 bh->b_size, 2388 &di->i_check, 2389 stats); 2390 if (status) 2391 goto out; 2392 } 2393 status = -EINVAL; 2394 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2395 mlog(ML_ERROR, "found superblock with incorrect block " 2396 "size: found %u, should be %u\n", 2397 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2398 blksz); 2399 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2400 OCFS2_MAJOR_REV_LEVEL || 2401 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2402 OCFS2_MINOR_REV_LEVEL) { 2403 mlog(ML_ERROR, "found superblock with bad version: " 2404 "found %u.%u, should be %u.%u\n", 2405 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2406 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2407 OCFS2_MAJOR_REV_LEVEL, 2408 OCFS2_MINOR_REV_LEVEL); 2409 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2410 mlog(ML_ERROR, "bad block number on superblock: " 2411 "found %llu, should be %llu\n", 2412 (unsigned long long)le64_to_cpu(di->i_blkno), 2413 (unsigned long long)bh->b_blocknr); 2414 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2415 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2416 mlog(ML_ERROR, "bad cluster size found: %u\n", 2417 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2418 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2419 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2420 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2421 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2422 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2423 mlog(ML_ERROR, 2424 "Superblock slots found greater than file system " 2425 "maximum: found %u, max %u\n", 2426 le16_to_cpu(di->id2.i_super.s_max_slots), 2427 OCFS2_MAX_SLOTS); 2428 } else { 2429 /* found it! */ 2430 status = 0; 2431 } 2432 } 2433 2434 out: 2435 if (status && status != -EAGAIN) 2436 mlog_errno(status); 2437 return status; 2438 } 2439 2440 static int ocfs2_check_volume(struct ocfs2_super *osb) 2441 { 2442 int status; 2443 int dirty; 2444 int local; 2445 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2446 * recover 2447 * ourselves. */ 2448 2449 /* Init our journal object. */ 2450 status = ocfs2_journal_init(osb->journal, &dirty); 2451 if (status < 0) { 2452 mlog(ML_ERROR, "Could not initialize journal!\n"); 2453 goto finally; 2454 } 2455 2456 /* Now that journal has been initialized, check to make sure 2457 entire volume is addressable. */ 2458 status = ocfs2_journal_addressable(osb); 2459 if (status) 2460 goto finally; 2461 2462 /* If the journal was unmounted cleanly then we don't want to 2463 * recover anything. Otherwise, journal_load will do that 2464 * dirty work for us :) */ 2465 if (!dirty) { 2466 status = ocfs2_journal_wipe(osb->journal, 0); 2467 if (status < 0) { 2468 mlog_errno(status); 2469 goto finally; 2470 } 2471 } else { 2472 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2473 "unmounted cleanly, recovering it.\n", osb->dev_str); 2474 } 2475 2476 local = ocfs2_mount_local(osb); 2477 2478 /* will play back anything left in the journal. */ 2479 status = ocfs2_journal_load(osb->journal, local, dirty); 2480 if (status < 0) { 2481 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2482 goto finally; 2483 } 2484 2485 if (dirty) { 2486 /* recover my local alloc if we didn't unmount cleanly. */ 2487 status = ocfs2_begin_local_alloc_recovery(osb, 2488 osb->slot_num, 2489 &local_alloc); 2490 if (status < 0) { 2491 mlog_errno(status); 2492 goto finally; 2493 } 2494 /* we complete the recovery process after we've marked 2495 * ourselves as mounted. */ 2496 } 2497 2498 status = ocfs2_load_local_alloc(osb); 2499 if (status < 0) { 2500 mlog_errno(status); 2501 goto finally; 2502 } 2503 2504 if (dirty) { 2505 /* Recovery will be completed after we've mounted the 2506 * rest of the volume. */ 2507 osb->dirty = 1; 2508 osb->local_alloc_copy = local_alloc; 2509 local_alloc = NULL; 2510 } 2511 2512 /* go through each journal, trylock it and if you get the 2513 * lock, and it's marked as dirty, set the bit in the recover 2514 * map and launch a recovery thread for it. */ 2515 status = ocfs2_mark_dead_nodes(osb); 2516 if (status < 0) { 2517 mlog_errno(status); 2518 goto finally; 2519 } 2520 2521 status = ocfs2_compute_replay_slots(osb); 2522 if (status < 0) 2523 mlog_errno(status); 2524 2525 finally: 2526 if (local_alloc) 2527 kfree(local_alloc); 2528 2529 if (status) 2530 mlog_errno(status); 2531 return status; 2532 } 2533 2534 /* 2535 * The routine gets called from dismount or close whenever a dismount on 2536 * volume is requested and the osb open count becomes 1. 2537 * It will remove the osb from the global list and also free up all the 2538 * initialized resources and fileobject. 2539 */ 2540 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2541 { 2542 /* This function assumes that the caller has the main osb resource */ 2543 2544 ocfs2_free_slot_info(osb); 2545 2546 kfree(osb->osb_orphan_wipes); 2547 kfree(osb->slot_recovery_generations); 2548 /* FIXME 2549 * This belongs in journal shutdown, but because we have to 2550 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2551 * we free it here. 2552 */ 2553 kfree(osb->journal); 2554 if (osb->local_alloc_copy) 2555 kfree(osb->local_alloc_copy); 2556 kfree(osb->uuid_str); 2557 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2558 memset(osb, 0, sizeof(struct ocfs2_super)); 2559 } 2560 2561 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2562 * panic(). We do not support continue-on-error operation. */ 2563 static void ocfs2_handle_error(struct super_block *sb) 2564 { 2565 struct ocfs2_super *osb = OCFS2_SB(sb); 2566 2567 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2568 panic("OCFS2: (device %s): panic forced after error\n", 2569 sb->s_id); 2570 2571 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2572 2573 if (sb->s_flags & MS_RDONLY && 2574 (ocfs2_is_soft_readonly(osb) || 2575 ocfs2_is_hard_readonly(osb))) 2576 return; 2577 2578 printk(KERN_CRIT "File system is now read-only due to the potential " 2579 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2580 "system is unmounted.\n"); 2581 sb->s_flags |= MS_RDONLY; 2582 ocfs2_set_ro_flag(osb, 0); 2583 } 2584 2585 static char error_buf[1024]; 2586 2587 void __ocfs2_error(struct super_block *sb, 2588 const char *function, 2589 const char *fmt, ...) 2590 { 2591 va_list args; 2592 2593 va_start(args, fmt); 2594 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2595 va_end(args); 2596 2597 /* Not using mlog here because we want to show the actual 2598 * function the error came from. */ 2599 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2600 sb->s_id, function, error_buf); 2601 2602 ocfs2_handle_error(sb); 2603 } 2604 2605 /* Handle critical errors. This is intentionally more drastic than 2606 * ocfs2_handle_error, so we only use for things like journal errors, 2607 * etc. */ 2608 void __ocfs2_abort(struct super_block* sb, 2609 const char *function, 2610 const char *fmt, ...) 2611 { 2612 va_list args; 2613 2614 va_start(args, fmt); 2615 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2616 va_end(args); 2617 2618 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2619 sb->s_id, function, error_buf); 2620 2621 /* We don't have the cluster support yet to go straight to 2622 * hard readonly in here. Until then, we want to keep 2623 * ocfs2_abort() so that we can at least mark critical 2624 * errors. 2625 * 2626 * TODO: This should abort the journal and alert other nodes 2627 * that our slot needs recovery. */ 2628 2629 /* Force a panic(). This stinks, but it's better than letting 2630 * things continue without having a proper hard readonly 2631 * here. */ 2632 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2633 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2634 ocfs2_handle_error(sb); 2635 } 2636 2637 /* 2638 * Void signal blockers, because in-kernel sigprocmask() only fails 2639 * when SIG_* is wrong. 2640 */ 2641 void ocfs2_block_signals(sigset_t *oldset) 2642 { 2643 int rc; 2644 sigset_t blocked; 2645 2646 sigfillset(&blocked); 2647 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2648 BUG_ON(rc); 2649 } 2650 2651 void ocfs2_unblock_signals(sigset_t *oldset) 2652 { 2653 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2654 BUG_ON(rc); 2655 } 2656 2657 module_init(ocfs2_init); 2658 module_exit(ocfs2_exit); 2659