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/utsname.h> 32 #include <linux/init.h> 33 #include <linux/random.h> 34 #include <linux/statfs.h> 35 #include <linux/moduleparam.h> 36 #include <linux/blkdev.h> 37 #include <linux/socket.h> 38 #include <linux/inet.h> 39 #include <linux/parser.h> 40 #include <linux/crc32.h> 41 #include <linux/debugfs.h> 42 #include <linux/mount.h> 43 #include <linux/seq_file.h> 44 #include <linux/quotaops.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 72 #include "buffer_head_io.h" 73 74 static struct kmem_cache *ocfs2_inode_cachep = NULL; 75 struct kmem_cache *ocfs2_dquot_cachep; 76 struct kmem_cache *ocfs2_qf_chunk_cachep; 77 78 /* OCFS2 needs to schedule several differnt types of work which 79 * require cluster locking, disk I/O, recovery waits, etc. Since these 80 * types of work tend to be heavy we avoid using the kernel events 81 * workqueue and schedule on our own. */ 82 struct workqueue_struct *ocfs2_wq = NULL; 83 84 static struct dentry *ocfs2_debugfs_root = NULL; 85 86 MODULE_AUTHOR("Oracle"); 87 MODULE_LICENSE("GPL"); 88 89 struct mount_options 90 { 91 unsigned long commit_interval; 92 unsigned long mount_opt; 93 unsigned int atime_quantum; 94 signed short slot; 95 unsigned int localalloc_opt; 96 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 97 }; 98 99 static int ocfs2_parse_options(struct super_block *sb, char *options, 100 struct mount_options *mopt, 101 int is_remount); 102 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 103 static void ocfs2_put_super(struct super_block *sb); 104 static int ocfs2_mount_volume(struct super_block *sb); 105 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 106 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 107 static int ocfs2_initialize_mem_caches(void); 108 static void ocfs2_free_mem_caches(void); 109 static void ocfs2_delete_osb(struct ocfs2_super *osb); 110 111 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 112 113 static int ocfs2_sync_fs(struct super_block *sb, int wait); 114 115 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 116 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 117 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 118 static int ocfs2_check_volume(struct ocfs2_super *osb); 119 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 120 struct buffer_head *bh, 121 u32 sectsize); 122 static int ocfs2_initialize_super(struct super_block *sb, 123 struct buffer_head *bh, 124 int sector_size); 125 static int ocfs2_get_sector(struct super_block *sb, 126 struct buffer_head **bh, 127 int block, 128 int sect_size); 129 static void ocfs2_write_super(struct super_block *sb); 130 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 131 static void ocfs2_destroy_inode(struct inode *inode); 132 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 133 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 134 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 135 136 static const struct super_operations ocfs2_sops = { 137 .statfs = ocfs2_statfs, 138 .alloc_inode = ocfs2_alloc_inode, 139 .destroy_inode = ocfs2_destroy_inode, 140 .drop_inode = ocfs2_drop_inode, 141 .clear_inode = ocfs2_clear_inode, 142 .delete_inode = ocfs2_delete_inode, 143 .sync_fs = ocfs2_sync_fs, 144 .write_super = ocfs2_write_super, 145 .put_super = ocfs2_put_super, 146 .remount_fs = ocfs2_remount, 147 .show_options = ocfs2_show_options, 148 .quota_read = ocfs2_quota_read, 149 .quota_write = ocfs2_quota_write, 150 }; 151 152 enum { 153 Opt_barrier, 154 Opt_err_panic, 155 Opt_err_ro, 156 Opt_intr, 157 Opt_nointr, 158 Opt_hb_none, 159 Opt_hb_local, 160 Opt_data_ordered, 161 Opt_data_writeback, 162 Opt_atime_quantum, 163 Opt_slot, 164 Opt_commit, 165 Opt_localalloc, 166 Opt_localflocks, 167 Opt_stack, 168 Opt_user_xattr, 169 Opt_nouser_xattr, 170 Opt_inode64, 171 Opt_acl, 172 Opt_noacl, 173 Opt_usrquota, 174 Opt_grpquota, 175 Opt_err, 176 }; 177 178 static const match_table_t tokens = { 179 {Opt_barrier, "barrier=%u"}, 180 {Opt_err_panic, "errors=panic"}, 181 {Opt_err_ro, "errors=remount-ro"}, 182 {Opt_intr, "intr"}, 183 {Opt_nointr, "nointr"}, 184 {Opt_hb_none, OCFS2_HB_NONE}, 185 {Opt_hb_local, OCFS2_HB_LOCAL}, 186 {Opt_data_ordered, "data=ordered"}, 187 {Opt_data_writeback, "data=writeback"}, 188 {Opt_atime_quantum, "atime_quantum=%u"}, 189 {Opt_slot, "preferred_slot=%u"}, 190 {Opt_commit, "commit=%u"}, 191 {Opt_localalloc, "localalloc=%d"}, 192 {Opt_localflocks, "localflocks"}, 193 {Opt_stack, "cluster_stack=%s"}, 194 {Opt_user_xattr, "user_xattr"}, 195 {Opt_nouser_xattr, "nouser_xattr"}, 196 {Opt_inode64, "inode64"}, 197 {Opt_acl, "acl"}, 198 {Opt_noacl, "noacl"}, 199 {Opt_usrquota, "usrquota"}, 200 {Opt_grpquota, "grpquota"}, 201 {Opt_err, NULL} 202 }; 203 204 #ifdef CONFIG_DEBUG_FS 205 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 206 { 207 int out = 0; 208 int i; 209 struct ocfs2_cluster_connection *cconn = osb->cconn; 210 struct ocfs2_recovery_map *rm = osb->recovery_map; 211 212 out += snprintf(buf + out, len - out, 213 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 214 "Device", osb->dev_str, osb->uuid_str, 215 osb->fs_generation, osb->vol_label); 216 217 out += snprintf(buf + out, len - out, 218 "%10s => State: %d Flags: 0x%lX\n", "Volume", 219 atomic_read(&osb->vol_state), osb->osb_flags); 220 221 out += snprintf(buf + out, len - out, 222 "%10s => Block: %lu Cluster: %d\n", "Sizes", 223 osb->sb->s_blocksize, osb->s_clustersize); 224 225 out += snprintf(buf + out, len - out, 226 "%10s => Compat: 0x%X Incompat: 0x%X " 227 "ROcompat: 0x%X\n", 228 "Features", osb->s_feature_compat, 229 osb->s_feature_incompat, osb->s_feature_ro_compat); 230 231 out += snprintf(buf + out, len - out, 232 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 233 osb->s_mount_opt, osb->s_atime_quantum); 234 235 out += snprintf(buf + out, len - out, 236 "%10s => Stack: %s Name: %*s Version: %d.%d\n", 237 "Cluster", 238 (*osb->osb_cluster_stack == '\0' ? 239 "o2cb" : osb->osb_cluster_stack), 240 cconn->cc_namelen, cconn->cc_name, 241 cconn->cc_version.pv_major, cconn->cc_version.pv_minor); 242 243 spin_lock(&osb->dc_task_lock); 244 out += snprintf(buf + out, len - out, 245 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 246 "WorkSeq: %lu\n", "DownCnvt", 247 task_pid_nr(osb->dc_task), osb->blocked_lock_count, 248 osb->dc_wake_sequence, osb->dc_work_sequence); 249 spin_unlock(&osb->dc_task_lock); 250 251 spin_lock(&osb->osb_lock); 252 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 253 "Recovery", 254 (osb->recovery_thread_task ? 255 task_pid_nr(osb->recovery_thread_task) : -1)); 256 if (rm->rm_used == 0) 257 out += snprintf(buf + out, len - out, " None\n"); 258 else { 259 for (i = 0; i < rm->rm_used; i++) 260 out += snprintf(buf + out, len - out, " %d", 261 rm->rm_entries[i]); 262 out += snprintf(buf + out, len - out, "\n"); 263 } 264 spin_unlock(&osb->osb_lock); 265 266 out += snprintf(buf + out, len - out, 267 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 268 task_pid_nr(osb->commit_task), osb->osb_commit_interval, 269 atomic_read(&osb->needs_checkpoint)); 270 271 out += snprintf(buf + out, len - out, 272 "%10s => State: %d NumTxns: %d TxnId: %lu\n", 273 "Journal", osb->journal->j_state, 274 atomic_read(&osb->journal->j_num_trans), 275 osb->journal->j_trans_id); 276 277 out += snprintf(buf + out, len - out, 278 "%10s => GlobalAllocs: %d LocalAllocs: %d " 279 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 280 "Stats", 281 atomic_read(&osb->alloc_stats.bitmap_data), 282 atomic_read(&osb->alloc_stats.local_data), 283 atomic_read(&osb->alloc_stats.bg_allocs), 284 atomic_read(&osb->alloc_stats.moves), 285 atomic_read(&osb->alloc_stats.bg_extends)); 286 287 out += snprintf(buf + out, len - out, 288 "%10s => State: %u Descriptor: %llu Size: %u bits " 289 "Default: %u bits\n", 290 "LocalAlloc", osb->local_alloc_state, 291 (unsigned long long)osb->la_last_gd, 292 osb->local_alloc_bits, osb->local_alloc_default_bits); 293 294 spin_lock(&osb->osb_lock); 295 out += snprintf(buf + out, len - out, 296 "%10s => Slot: %d NumStolen: %d\n", "Steal", 297 osb->s_inode_steal_slot, 298 atomic_read(&osb->s_num_inodes_stolen)); 299 spin_unlock(&osb->osb_lock); 300 301 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 302 "Slots", "Num", "RecoGen"); 303 304 for (i = 0; i < osb->max_slots; ++i) { 305 out += snprintf(buf + out, len - out, 306 "%10s %c %3d %10d\n", 307 " ", 308 (i == osb->slot_num ? '*' : ' '), 309 i, osb->slot_recovery_generations[i]); 310 } 311 312 return out; 313 } 314 315 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 316 { 317 struct ocfs2_super *osb = inode->i_private; 318 char *buf = NULL; 319 320 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 321 if (!buf) 322 goto bail; 323 324 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 325 326 file->private_data = buf; 327 328 return 0; 329 bail: 330 return -ENOMEM; 331 } 332 333 static int ocfs2_debug_release(struct inode *inode, struct file *file) 334 { 335 kfree(file->private_data); 336 return 0; 337 } 338 339 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 340 size_t nbytes, loff_t *ppos) 341 { 342 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 343 i_size_read(file->f_mapping->host)); 344 } 345 #else 346 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 347 { 348 return 0; 349 } 350 static int ocfs2_debug_release(struct inode *inode, struct file *file) 351 { 352 return 0; 353 } 354 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 355 size_t nbytes, loff_t *ppos) 356 { 357 return 0; 358 } 359 #endif /* CONFIG_DEBUG_FS */ 360 361 static struct file_operations ocfs2_osb_debug_fops = { 362 .open = ocfs2_osb_debug_open, 363 .release = ocfs2_debug_release, 364 .read = ocfs2_debug_read, 365 .llseek = generic_file_llseek, 366 }; 367 368 /* 369 * write_super and sync_fs ripped right out of ext3. 370 */ 371 static void ocfs2_write_super(struct super_block *sb) 372 { 373 if (mutex_trylock(&sb->s_lock) != 0) 374 BUG(); 375 sb->s_dirt = 0; 376 } 377 378 static int ocfs2_sync_fs(struct super_block *sb, int wait) 379 { 380 int status; 381 tid_t target; 382 struct ocfs2_super *osb = OCFS2_SB(sb); 383 384 sb->s_dirt = 0; 385 386 if (ocfs2_is_hard_readonly(osb)) 387 return -EROFS; 388 389 if (wait) { 390 status = ocfs2_flush_truncate_log(osb); 391 if (status < 0) 392 mlog_errno(status); 393 } else { 394 ocfs2_schedule_truncate_log_flush(osb, 0); 395 } 396 397 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 398 &target)) { 399 if (wait) 400 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 401 target); 402 } 403 return 0; 404 } 405 406 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 407 { 408 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 409 && (ino == USER_QUOTA_SYSTEM_INODE 410 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 411 return 0; 412 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 413 && (ino == GROUP_QUOTA_SYSTEM_INODE 414 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 415 return 0; 416 return 1; 417 } 418 419 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 420 { 421 struct inode *new = NULL; 422 int status = 0; 423 int i; 424 425 mlog_entry_void(); 426 427 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 428 if (IS_ERR(new)) { 429 status = PTR_ERR(new); 430 mlog_errno(status); 431 goto bail; 432 } 433 osb->root_inode = new; 434 435 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 436 if (IS_ERR(new)) { 437 status = PTR_ERR(new); 438 mlog_errno(status); 439 goto bail; 440 } 441 osb->sys_root_inode = new; 442 443 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 444 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 445 if (!ocfs2_need_system_inode(osb, i)) 446 continue; 447 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 448 if (!new) { 449 ocfs2_release_system_inodes(osb); 450 status = -EINVAL; 451 mlog_errno(status); 452 /* FIXME: Should ERROR_RO_FS */ 453 mlog(ML_ERROR, "Unable to load system inode %d, " 454 "possibly corrupt fs?", i); 455 goto bail; 456 } 457 // the array now has one ref, so drop this one 458 iput(new); 459 } 460 461 bail: 462 mlog_exit(status); 463 return status; 464 } 465 466 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 467 { 468 struct inode *new = NULL; 469 int status = 0; 470 int i; 471 472 mlog_entry_void(); 473 474 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 475 i < NUM_SYSTEM_INODES; 476 i++) { 477 if (!ocfs2_need_system_inode(osb, i)) 478 continue; 479 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 480 if (!new) { 481 ocfs2_release_system_inodes(osb); 482 status = -EINVAL; 483 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 484 status, i, osb->slot_num); 485 goto bail; 486 } 487 /* the array now has one ref, so drop this one */ 488 iput(new); 489 } 490 491 bail: 492 mlog_exit(status); 493 return status; 494 } 495 496 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 497 { 498 int i; 499 struct inode *inode; 500 501 mlog_entry_void(); 502 503 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 504 inode = osb->system_inodes[i]; 505 if (inode) { 506 iput(inode); 507 osb->system_inodes[i] = NULL; 508 } 509 } 510 511 inode = osb->sys_root_inode; 512 if (inode) { 513 iput(inode); 514 osb->sys_root_inode = NULL; 515 } 516 517 inode = osb->root_inode; 518 if (inode) { 519 iput(inode); 520 osb->root_inode = NULL; 521 } 522 523 mlog_exit(0); 524 } 525 526 /* We're allocating fs objects, use GFP_NOFS */ 527 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 528 { 529 struct ocfs2_inode_info *oi; 530 531 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 532 if (!oi) 533 return NULL; 534 535 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 536 return &oi->vfs_inode; 537 } 538 539 static void ocfs2_destroy_inode(struct inode *inode) 540 { 541 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 542 } 543 544 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 545 unsigned int cbits) 546 { 547 unsigned int bytes = 1 << cbits; 548 unsigned int trim = bytes; 549 unsigned int bitshift = 32; 550 551 /* 552 * i_size and all block offsets in ocfs2 are always 64 bits 553 * wide. i_clusters is 32 bits, in cluster-sized units. So on 554 * 64 bit platforms, cluster size will be the limiting factor. 555 */ 556 557 #if BITS_PER_LONG == 32 558 # if defined(CONFIG_LBD) 559 BUILD_BUG_ON(sizeof(sector_t) != 8); 560 /* 561 * We might be limited by page cache size. 562 */ 563 if (bytes > PAGE_CACHE_SIZE) { 564 bytes = PAGE_CACHE_SIZE; 565 trim = 1; 566 /* 567 * Shift by 31 here so that we don't get larger than 568 * MAX_LFS_FILESIZE 569 */ 570 bitshift = 31; 571 } 572 # else 573 /* 574 * We are limited by the size of sector_t. Use block size, as 575 * that's what we expose to the VFS. 576 */ 577 bytes = 1 << bbits; 578 trim = 1; 579 bitshift = 31; 580 # endif 581 #endif 582 583 /* 584 * Trim by a whole cluster when we can actually approach the 585 * on-disk limits. Otherwise we can overflow i_clusters when 586 * an extent start is at the max offset. 587 */ 588 return (((unsigned long long)bytes) << bitshift) - trim; 589 } 590 591 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 592 { 593 int incompat_features; 594 int ret = 0; 595 struct mount_options parsed_options; 596 struct ocfs2_super *osb = OCFS2_SB(sb); 597 598 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 599 ret = -EINVAL; 600 goto out; 601 } 602 603 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 604 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 605 ret = -EINVAL; 606 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 607 goto out; 608 } 609 610 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 611 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 612 ret = -EINVAL; 613 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 614 goto out; 615 } 616 617 /* Probably don't want this on remount; it might 618 * mess with other nodes */ 619 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 620 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 621 ret = -EINVAL; 622 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 623 goto out; 624 } 625 626 /* We're going to/from readonly mode. */ 627 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 628 /* Disable quota accounting before remounting RO */ 629 if (*flags & MS_RDONLY) { 630 ret = ocfs2_susp_quotas(osb, 0); 631 if (ret < 0) 632 goto out; 633 } 634 /* Lock here so the check of HARD_RO and the potential 635 * setting of SOFT_RO is atomic. */ 636 spin_lock(&osb->osb_lock); 637 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 638 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 639 ret = -EROFS; 640 goto unlock_osb; 641 } 642 643 if (*flags & MS_RDONLY) { 644 mlog(0, "Going to ro mode.\n"); 645 sb->s_flags |= MS_RDONLY; 646 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 647 } else { 648 mlog(0, "Making ro filesystem writeable.\n"); 649 650 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 651 mlog(ML_ERROR, "Cannot remount RDWR " 652 "filesystem due to previous errors.\n"); 653 ret = -EROFS; 654 goto unlock_osb; 655 } 656 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 657 if (incompat_features) { 658 mlog(ML_ERROR, "Cannot remount RDWR because " 659 "of unsupported optional features " 660 "(%x).\n", incompat_features); 661 ret = -EINVAL; 662 goto unlock_osb; 663 } 664 sb->s_flags &= ~MS_RDONLY; 665 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 666 } 667 unlock_osb: 668 spin_unlock(&osb->osb_lock); 669 /* Enable quota accounting after remounting RW */ 670 if (!ret && !(*flags & MS_RDONLY)) { 671 if (sb_any_quota_suspended(sb)) 672 ret = ocfs2_susp_quotas(osb, 1); 673 else 674 ret = ocfs2_enable_quotas(osb); 675 if (ret < 0) { 676 /* Return back changes... */ 677 spin_lock(&osb->osb_lock); 678 sb->s_flags |= MS_RDONLY; 679 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 680 spin_unlock(&osb->osb_lock); 681 goto out; 682 } 683 } 684 } 685 686 if (!ret) { 687 /* Only save off the new mount options in case of a successful 688 * remount. */ 689 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)) 690 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 691 osb->s_mount_opt = parsed_options.mount_opt; 692 osb->s_atime_quantum = parsed_options.atime_quantum; 693 osb->preferred_slot = parsed_options.slot; 694 if (parsed_options.commit_interval) 695 osb->osb_commit_interval = parsed_options.commit_interval; 696 697 if (!ocfs2_is_hard_readonly(osb)) 698 ocfs2_set_journal_params(osb); 699 } 700 out: 701 return ret; 702 } 703 704 static int ocfs2_sb_probe(struct super_block *sb, 705 struct buffer_head **bh, 706 int *sector_size) 707 { 708 int status, tmpstat; 709 struct ocfs1_vol_disk_hdr *hdr; 710 struct ocfs2_dinode *di; 711 int blksize; 712 713 *bh = NULL; 714 715 /* may be > 512 */ 716 *sector_size = bdev_hardsect_size(sb->s_bdev); 717 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 718 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 719 *sector_size, OCFS2_MAX_BLOCKSIZE); 720 status = -EINVAL; 721 goto bail; 722 } 723 724 /* Can this really happen? */ 725 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 726 *sector_size = OCFS2_MIN_BLOCKSIZE; 727 728 /* check block zero for old format */ 729 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 730 if (status < 0) { 731 mlog_errno(status); 732 goto bail; 733 } 734 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 735 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 736 mlog(ML_ERROR, "incompatible version: %u.%u\n", 737 hdr->major_version, hdr->minor_version); 738 status = -EINVAL; 739 } 740 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 741 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 742 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 743 hdr->signature); 744 status = -EINVAL; 745 } 746 brelse(*bh); 747 *bh = NULL; 748 if (status < 0) { 749 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 750 "upgraded before mounting with ocfs v2\n"); 751 goto bail; 752 } 753 754 /* 755 * Now check at magic offset for 512, 1024, 2048, 4096 756 * blocksizes. 4096 is the maximum blocksize because it is 757 * the minimum clustersize. 758 */ 759 status = -EINVAL; 760 for (blksize = *sector_size; 761 blksize <= OCFS2_MAX_BLOCKSIZE; 762 blksize <<= 1) { 763 tmpstat = ocfs2_get_sector(sb, bh, 764 OCFS2_SUPER_BLOCK_BLKNO, 765 blksize); 766 if (tmpstat < 0) { 767 status = tmpstat; 768 mlog_errno(status); 769 goto bail; 770 } 771 di = (struct ocfs2_dinode *) (*bh)->b_data; 772 status = ocfs2_verify_volume(di, *bh, blksize); 773 if (status >= 0) 774 goto bail; 775 brelse(*bh); 776 *bh = NULL; 777 if (status != -EAGAIN) 778 break; 779 } 780 781 bail: 782 return status; 783 } 784 785 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 786 { 787 if (ocfs2_mount_local(osb)) { 788 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 789 mlog(ML_ERROR, "Cannot heartbeat on a locally " 790 "mounted device.\n"); 791 return -EINVAL; 792 } 793 } 794 795 if (ocfs2_userspace_stack(osb)) { 796 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 797 mlog(ML_ERROR, "Userspace stack expected, but " 798 "o2cb heartbeat arguments passed to mount\n"); 799 return -EINVAL; 800 } 801 } 802 803 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 804 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 805 !ocfs2_userspace_stack(osb)) { 806 mlog(ML_ERROR, "Heartbeat has to be started to mount " 807 "a read-write clustered device.\n"); 808 return -EINVAL; 809 } 810 } 811 812 return 0; 813 } 814 815 /* 816 * If we're using a userspace stack, mount should have passed 817 * a name that matches the disk. If not, mount should not 818 * have passed a stack. 819 */ 820 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 821 struct mount_options *mopt) 822 { 823 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 824 mlog(ML_ERROR, 825 "cluster stack passed to mount, but this filesystem " 826 "does not support it\n"); 827 return -EINVAL; 828 } 829 830 if (ocfs2_userspace_stack(osb) && 831 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 832 OCFS2_STACK_LABEL_LEN)) { 833 mlog(ML_ERROR, 834 "cluster stack passed to mount (\"%s\") does not " 835 "match the filesystem (\"%s\")\n", 836 mopt->cluster_stack, 837 osb->osb_cluster_stack); 838 return -EINVAL; 839 } 840 841 return 0; 842 } 843 844 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 845 { 846 int type; 847 struct super_block *sb = osb->sb; 848 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 849 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 850 int status = 0; 851 852 for (type = 0; type < MAXQUOTAS; type++) { 853 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 854 continue; 855 if (unsuspend) 856 status = vfs_quota_enable( 857 sb_dqopt(sb)->files[type], 858 type, QFMT_OCFS2, 859 DQUOT_SUSPENDED); 860 else 861 status = vfs_quota_disable(sb, type, 862 DQUOT_SUSPENDED); 863 if (status < 0) 864 break; 865 } 866 if (status < 0) 867 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 868 "remount (error = %d).\n", status); 869 return status; 870 } 871 872 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 873 { 874 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 875 struct super_block *sb = osb->sb; 876 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 877 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 878 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 879 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 880 int status; 881 int type; 882 883 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 884 for (type = 0; type < MAXQUOTAS; type++) { 885 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 886 continue; 887 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 888 osb->slot_num); 889 if (!inode[type]) { 890 status = -ENOENT; 891 goto out_quota_off; 892 } 893 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2, 894 DQUOT_USAGE_ENABLED); 895 if (status < 0) 896 goto out_quota_off; 897 } 898 899 for (type = 0; type < MAXQUOTAS; type++) 900 iput(inode[type]); 901 return 0; 902 out_quota_off: 903 ocfs2_disable_quotas(osb); 904 for (type = 0; type < MAXQUOTAS; type++) 905 iput(inode[type]); 906 mlog_errno(status); 907 return status; 908 } 909 910 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 911 { 912 int type; 913 struct inode *inode; 914 struct super_block *sb = osb->sb; 915 916 /* We mostly ignore errors in this function because there's not much 917 * we can do when we see them */ 918 for (type = 0; type < MAXQUOTAS; type++) { 919 if (!sb_has_quota_loaded(sb, type)) 920 continue; 921 inode = igrab(sb->s_dquot.files[type]); 922 /* Turn off quotas. This will remove all dquot structures from 923 * memory and so they will be automatically synced to global 924 * quota files */ 925 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED | 926 DQUOT_LIMITS_ENABLED); 927 if (!inode) 928 continue; 929 iput(inode); 930 } 931 } 932 933 /* Handle quota on quotactl */ 934 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 935 char *path, int remount) 936 { 937 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 938 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 939 940 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 941 return -EINVAL; 942 943 if (remount) 944 return 0; /* Just ignore it has been handled in 945 * ocfs2_remount() */ 946 return vfs_quota_enable(sb_dqopt(sb)->files[type], type, 947 format_id, DQUOT_LIMITS_ENABLED); 948 } 949 950 /* Handle quota off quotactl */ 951 static int ocfs2_quota_off(struct super_block *sb, int type, int remount) 952 { 953 if (remount) 954 return 0; /* Ignore now and handle later in 955 * ocfs2_remount() */ 956 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED); 957 } 958 959 static struct quotactl_ops ocfs2_quotactl_ops = { 960 .quota_on = ocfs2_quota_on, 961 .quota_off = ocfs2_quota_off, 962 .quota_sync = vfs_quota_sync, 963 .get_info = vfs_get_dqinfo, 964 .set_info = vfs_set_dqinfo, 965 .get_dqblk = vfs_get_dqblk, 966 .set_dqblk = vfs_set_dqblk, 967 }; 968 969 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 970 { 971 struct dentry *root; 972 int status, sector_size; 973 struct mount_options parsed_options; 974 struct inode *inode = NULL; 975 struct ocfs2_super *osb = NULL; 976 struct buffer_head *bh = NULL; 977 char nodestr[8]; 978 979 mlog_entry("%p, %p, %i", sb, data, silent); 980 981 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 982 status = -EINVAL; 983 goto read_super_error; 984 } 985 986 /* probe for superblock */ 987 status = ocfs2_sb_probe(sb, &bh, §or_size); 988 if (status < 0) { 989 mlog(ML_ERROR, "superblock probe failed!\n"); 990 goto read_super_error; 991 } 992 993 status = ocfs2_initialize_super(sb, bh, sector_size); 994 osb = OCFS2_SB(sb); 995 if (status < 0) { 996 mlog_errno(status); 997 goto read_super_error; 998 } 999 brelse(bh); 1000 bh = NULL; 1001 1002 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)) 1003 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1004 1005 osb->s_mount_opt = parsed_options.mount_opt; 1006 osb->s_atime_quantum = parsed_options.atime_quantum; 1007 osb->preferred_slot = parsed_options.slot; 1008 osb->osb_commit_interval = parsed_options.commit_interval; 1009 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt); 1010 osb->local_alloc_bits = osb->local_alloc_default_bits; 1011 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA && 1012 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1013 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1014 status = -EINVAL; 1015 mlog(ML_ERROR, "User quotas were requested, but this " 1016 "filesystem does not have the feature enabled.\n"); 1017 goto read_super_error; 1018 } 1019 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA && 1020 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1021 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1022 status = -EINVAL; 1023 mlog(ML_ERROR, "Group quotas were requested, but this " 1024 "filesystem does not have the feature enabled.\n"); 1025 goto read_super_error; 1026 } 1027 1028 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1029 if (status) 1030 goto read_super_error; 1031 1032 sb->s_magic = OCFS2_SUPER_MAGIC; 1033 1034 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1035 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1036 1037 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1038 * heartbeat=none */ 1039 if (bdev_read_only(sb->s_bdev)) { 1040 if (!(sb->s_flags & MS_RDONLY)) { 1041 status = -EACCES; 1042 mlog(ML_ERROR, "Readonly device detected but readonly " 1043 "mount was not specified.\n"); 1044 goto read_super_error; 1045 } 1046 1047 /* You should not be able to start a local heartbeat 1048 * on a readonly device. */ 1049 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1050 status = -EROFS; 1051 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1052 "device.\n"); 1053 goto read_super_error; 1054 } 1055 1056 status = ocfs2_check_journals_nolocks(osb); 1057 if (status < 0) { 1058 if (status == -EROFS) 1059 mlog(ML_ERROR, "Recovery required on readonly " 1060 "file system, but write access is " 1061 "unavailable.\n"); 1062 else 1063 mlog_errno(status); 1064 goto read_super_error; 1065 } 1066 1067 ocfs2_set_ro_flag(osb, 1); 1068 1069 printk(KERN_NOTICE "Readonly device detected. No cluster " 1070 "services will be utilized for this mount. Recovery " 1071 "will be skipped.\n"); 1072 } 1073 1074 if (!ocfs2_is_hard_readonly(osb)) { 1075 if (sb->s_flags & MS_RDONLY) 1076 ocfs2_set_ro_flag(osb, 0); 1077 } 1078 1079 status = ocfs2_verify_heartbeat(osb); 1080 if (status < 0) { 1081 mlog_errno(status); 1082 goto read_super_error; 1083 } 1084 1085 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1086 ocfs2_debugfs_root); 1087 if (!osb->osb_debug_root) { 1088 status = -EINVAL; 1089 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1090 goto read_super_error; 1091 } 1092 1093 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1094 osb->osb_debug_root, 1095 osb, 1096 &ocfs2_osb_debug_fops); 1097 if (!osb->osb_ctxt) { 1098 status = -EINVAL; 1099 mlog_errno(status); 1100 goto read_super_error; 1101 } 1102 1103 status = ocfs2_mount_volume(sb); 1104 if (osb->root_inode) 1105 inode = igrab(osb->root_inode); 1106 1107 if (status < 0) 1108 goto read_super_error; 1109 1110 if (!inode) { 1111 status = -EIO; 1112 mlog_errno(status); 1113 goto read_super_error; 1114 } 1115 1116 root = d_alloc_root(inode); 1117 if (!root) { 1118 status = -ENOMEM; 1119 mlog_errno(status); 1120 goto read_super_error; 1121 } 1122 1123 sb->s_root = root; 1124 1125 ocfs2_complete_mount_recovery(osb); 1126 1127 if (ocfs2_mount_local(osb)) 1128 snprintf(nodestr, sizeof(nodestr), "local"); 1129 else 1130 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1131 1132 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1133 "with %s data mode.\n", 1134 osb->dev_str, nodestr, osb->slot_num, 1135 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1136 "ordered"); 1137 1138 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1139 wake_up(&osb->osb_mount_event); 1140 1141 /* Now we can initialize quotas because we can afford to wait 1142 * for cluster locks recovery now. That also means that truncation 1143 * log recovery can happen but that waits for proper quota setup */ 1144 if (!(sb->s_flags & MS_RDONLY)) { 1145 status = ocfs2_enable_quotas(osb); 1146 if (status < 0) { 1147 /* We have to err-out specially here because 1148 * s_root is already set */ 1149 mlog_errno(status); 1150 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1151 wake_up(&osb->osb_mount_event); 1152 mlog_exit(status); 1153 return status; 1154 } 1155 } 1156 1157 ocfs2_complete_quota_recovery(osb); 1158 1159 /* Now we wake up again for processes waiting for quotas */ 1160 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1161 wake_up(&osb->osb_mount_event); 1162 1163 mlog_exit(status); 1164 return status; 1165 1166 read_super_error: 1167 brelse(bh); 1168 1169 if (inode) 1170 iput(inode); 1171 1172 if (osb) { 1173 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1174 wake_up(&osb->osb_mount_event); 1175 ocfs2_dismount_volume(sb, 1); 1176 } 1177 1178 mlog_exit(status); 1179 return status; 1180 } 1181 1182 static int ocfs2_get_sb(struct file_system_type *fs_type, 1183 int flags, 1184 const char *dev_name, 1185 void *data, 1186 struct vfsmount *mnt) 1187 { 1188 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 1189 mnt); 1190 } 1191 1192 static struct file_system_type ocfs2_fs_type = { 1193 .owner = THIS_MODULE, 1194 .name = "ocfs2", 1195 .get_sb = ocfs2_get_sb, /* is this called when we mount 1196 * the fs? */ 1197 .kill_sb = kill_block_super, /* set to the generic one 1198 * right now, but do we 1199 * need to change that? */ 1200 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1201 .next = NULL 1202 }; 1203 1204 static int ocfs2_parse_options(struct super_block *sb, 1205 char *options, 1206 struct mount_options *mopt, 1207 int is_remount) 1208 { 1209 int status; 1210 char *p; 1211 1212 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1213 options ? options : "(none)"); 1214 1215 mopt->commit_interval = 0; 1216 mopt->mount_opt = 0; 1217 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1218 mopt->slot = OCFS2_INVALID_SLOT; 1219 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE; 1220 mopt->cluster_stack[0] = '\0'; 1221 1222 if (!options) { 1223 status = 1; 1224 goto bail; 1225 } 1226 1227 while ((p = strsep(&options, ",")) != NULL) { 1228 int token, option; 1229 substring_t args[MAX_OPT_ARGS]; 1230 1231 if (!*p) 1232 continue; 1233 1234 token = match_token(p, tokens, args); 1235 switch (token) { 1236 case Opt_hb_local: 1237 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1238 break; 1239 case Opt_hb_none: 1240 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 1241 break; 1242 case Opt_barrier: 1243 if (match_int(&args[0], &option)) { 1244 status = 0; 1245 goto bail; 1246 } 1247 if (option) 1248 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1249 else 1250 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1251 break; 1252 case Opt_intr: 1253 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1254 break; 1255 case Opt_nointr: 1256 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1257 break; 1258 case Opt_err_panic: 1259 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1260 break; 1261 case Opt_err_ro: 1262 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1263 break; 1264 case Opt_data_ordered: 1265 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1266 break; 1267 case Opt_data_writeback: 1268 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1269 break; 1270 case Opt_user_xattr: 1271 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1272 break; 1273 case Opt_nouser_xattr: 1274 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1275 break; 1276 case Opt_atime_quantum: 1277 if (match_int(&args[0], &option)) { 1278 status = 0; 1279 goto bail; 1280 } 1281 if (option >= 0) 1282 mopt->atime_quantum = option; 1283 break; 1284 case Opt_slot: 1285 option = 0; 1286 if (match_int(&args[0], &option)) { 1287 status = 0; 1288 goto bail; 1289 } 1290 if (option) 1291 mopt->slot = (s16)option; 1292 break; 1293 case Opt_commit: 1294 option = 0; 1295 if (match_int(&args[0], &option)) { 1296 status = 0; 1297 goto bail; 1298 } 1299 if (option < 0) 1300 return 0; 1301 if (option == 0) 1302 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1303 mopt->commit_interval = HZ * option; 1304 break; 1305 case Opt_localalloc: 1306 option = 0; 1307 if (match_int(&args[0], &option)) { 1308 status = 0; 1309 goto bail; 1310 } 1311 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8)) 1312 mopt->localalloc_opt = option; 1313 break; 1314 case Opt_localflocks: 1315 /* 1316 * Changing this during remount could race 1317 * flock() requests, or "unbalance" existing 1318 * ones (e.g., a lock is taken in one mode but 1319 * dropped in the other). If users care enough 1320 * to flip locking modes during remount, we 1321 * could add a "local" flag to individual 1322 * flock structures for proper tracking of 1323 * state. 1324 */ 1325 if (!is_remount) 1326 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1327 break; 1328 case Opt_stack: 1329 /* Check both that the option we were passed 1330 * is of the right length and that it is a proper 1331 * string of the right length. 1332 */ 1333 if (((args[0].to - args[0].from) != 1334 OCFS2_STACK_LABEL_LEN) || 1335 (strnlen(args[0].from, 1336 OCFS2_STACK_LABEL_LEN) != 1337 OCFS2_STACK_LABEL_LEN)) { 1338 mlog(ML_ERROR, 1339 "Invalid cluster_stack option\n"); 1340 status = 0; 1341 goto bail; 1342 } 1343 memcpy(mopt->cluster_stack, args[0].from, 1344 OCFS2_STACK_LABEL_LEN); 1345 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1346 break; 1347 case Opt_inode64: 1348 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1349 break; 1350 case Opt_usrquota: 1351 /* We check only on remount, otherwise features 1352 * aren't yet initialized. */ 1353 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1354 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1355 mlog(ML_ERROR, "User quota requested but " 1356 "filesystem feature is not set\n"); 1357 status = 0; 1358 goto bail; 1359 } 1360 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1361 break; 1362 case Opt_grpquota: 1363 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1364 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1365 mlog(ML_ERROR, "Group quota requested but " 1366 "filesystem feature is not set\n"); 1367 status = 0; 1368 goto bail; 1369 } 1370 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1371 break; 1372 #ifdef CONFIG_OCFS2_FS_POSIX_ACL 1373 case Opt_acl: 1374 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1375 break; 1376 case Opt_noacl: 1377 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1378 break; 1379 #else 1380 case Opt_acl: 1381 case Opt_noacl: 1382 printk(KERN_INFO "ocfs2 (no)acl options not supported\n"); 1383 break; 1384 #endif 1385 default: 1386 mlog(ML_ERROR, 1387 "Unrecognized mount option \"%s\" " 1388 "or missing value\n", p); 1389 status = 0; 1390 goto bail; 1391 } 1392 } 1393 1394 status = 1; 1395 1396 bail: 1397 mlog_exit(status); 1398 return status; 1399 } 1400 1401 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1402 { 1403 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1404 unsigned long opts = osb->s_mount_opt; 1405 unsigned int local_alloc_megs; 1406 1407 if (opts & OCFS2_MOUNT_HB_LOCAL) 1408 seq_printf(s, ",_netdev,heartbeat=local"); 1409 else 1410 seq_printf(s, ",heartbeat=none"); 1411 1412 if (opts & OCFS2_MOUNT_NOINTR) 1413 seq_printf(s, ",nointr"); 1414 1415 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1416 seq_printf(s, ",data=writeback"); 1417 else 1418 seq_printf(s, ",data=ordered"); 1419 1420 if (opts & OCFS2_MOUNT_BARRIER) 1421 seq_printf(s, ",barrier=1"); 1422 1423 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1424 seq_printf(s, ",errors=panic"); 1425 else 1426 seq_printf(s, ",errors=remount-ro"); 1427 1428 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1429 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1430 1431 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1432 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1433 1434 if (osb->osb_commit_interval) 1435 seq_printf(s, ",commit=%u", 1436 (unsigned) (osb->osb_commit_interval / HZ)); 1437 1438 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1439 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE) 1440 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1441 1442 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1443 seq_printf(s, ",localflocks,"); 1444 1445 if (osb->osb_cluster_stack[0]) 1446 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1447 osb->osb_cluster_stack); 1448 if (opts & OCFS2_MOUNT_USRQUOTA) 1449 seq_printf(s, ",usrquota"); 1450 if (opts & OCFS2_MOUNT_GRPQUOTA) 1451 seq_printf(s, ",grpquota"); 1452 1453 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1454 seq_printf(s, ",nouser_xattr"); 1455 else 1456 seq_printf(s, ",user_xattr"); 1457 1458 if (opts & OCFS2_MOUNT_INODE64) 1459 seq_printf(s, ",inode64"); 1460 1461 #ifdef CONFIG_OCFS2_FS_POSIX_ACL 1462 if (opts & OCFS2_MOUNT_POSIX_ACL) 1463 seq_printf(s, ",acl"); 1464 else 1465 seq_printf(s, ",noacl"); 1466 #endif 1467 1468 return 0; 1469 } 1470 1471 static int __init ocfs2_init(void) 1472 { 1473 int status; 1474 1475 mlog_entry_void(); 1476 1477 ocfs2_print_version(); 1478 1479 status = init_ocfs2_uptodate_cache(); 1480 if (status < 0) { 1481 mlog_errno(status); 1482 goto leave; 1483 } 1484 1485 status = ocfs2_initialize_mem_caches(); 1486 if (status < 0) { 1487 mlog_errno(status); 1488 goto leave; 1489 } 1490 1491 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1492 if (!ocfs2_wq) { 1493 status = -ENOMEM; 1494 goto leave; 1495 } 1496 1497 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1498 if (!ocfs2_debugfs_root) { 1499 status = -EFAULT; 1500 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1501 } 1502 1503 status = ocfs2_quota_setup(); 1504 if (status) 1505 goto leave; 1506 1507 ocfs2_set_locking_protocol(); 1508 1509 status = register_quota_format(&ocfs2_quota_format); 1510 leave: 1511 if (status < 0) { 1512 ocfs2_quota_shutdown(); 1513 ocfs2_free_mem_caches(); 1514 exit_ocfs2_uptodate_cache(); 1515 } 1516 1517 mlog_exit(status); 1518 1519 if (status >= 0) { 1520 return register_filesystem(&ocfs2_fs_type); 1521 } else 1522 return -1; 1523 } 1524 1525 static void __exit ocfs2_exit(void) 1526 { 1527 mlog_entry_void(); 1528 1529 ocfs2_quota_shutdown(); 1530 1531 if (ocfs2_wq) { 1532 flush_workqueue(ocfs2_wq); 1533 destroy_workqueue(ocfs2_wq); 1534 } 1535 1536 unregister_quota_format(&ocfs2_quota_format); 1537 1538 debugfs_remove(ocfs2_debugfs_root); 1539 1540 ocfs2_free_mem_caches(); 1541 1542 unregister_filesystem(&ocfs2_fs_type); 1543 1544 exit_ocfs2_uptodate_cache(); 1545 1546 mlog_exit_void(); 1547 } 1548 1549 static void ocfs2_put_super(struct super_block *sb) 1550 { 1551 mlog_entry("(0x%p)\n", sb); 1552 1553 ocfs2_sync_blockdev(sb); 1554 ocfs2_dismount_volume(sb, 0); 1555 1556 mlog_exit_void(); 1557 } 1558 1559 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1560 { 1561 struct ocfs2_super *osb; 1562 u32 numbits, freebits; 1563 int status; 1564 struct ocfs2_dinode *bm_lock; 1565 struct buffer_head *bh = NULL; 1566 struct inode *inode = NULL; 1567 1568 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1569 1570 osb = OCFS2_SB(dentry->d_sb); 1571 1572 inode = ocfs2_get_system_file_inode(osb, 1573 GLOBAL_BITMAP_SYSTEM_INODE, 1574 OCFS2_INVALID_SLOT); 1575 if (!inode) { 1576 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1577 status = -EIO; 1578 goto bail; 1579 } 1580 1581 status = ocfs2_inode_lock(inode, &bh, 0); 1582 if (status < 0) { 1583 mlog_errno(status); 1584 goto bail; 1585 } 1586 1587 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1588 1589 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1590 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1591 1592 buf->f_type = OCFS2_SUPER_MAGIC; 1593 buf->f_bsize = dentry->d_sb->s_blocksize; 1594 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1595 buf->f_blocks = ((sector_t) numbits) * 1596 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1597 buf->f_bfree = ((sector_t) freebits) * 1598 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1599 buf->f_bavail = buf->f_bfree; 1600 buf->f_files = numbits; 1601 buf->f_ffree = freebits; 1602 1603 brelse(bh); 1604 1605 ocfs2_inode_unlock(inode, 0); 1606 status = 0; 1607 bail: 1608 if (inode) 1609 iput(inode); 1610 1611 mlog_exit(status); 1612 1613 return status; 1614 } 1615 1616 static void ocfs2_inode_init_once(void *data) 1617 { 1618 struct ocfs2_inode_info *oi = data; 1619 1620 oi->ip_flags = 0; 1621 oi->ip_open_count = 0; 1622 spin_lock_init(&oi->ip_lock); 1623 ocfs2_extent_map_init(&oi->vfs_inode); 1624 INIT_LIST_HEAD(&oi->ip_io_markers); 1625 oi->ip_created_trans = 0; 1626 oi->ip_last_trans = 0; 1627 oi->ip_dir_start_lookup = 0; 1628 1629 init_rwsem(&oi->ip_alloc_sem); 1630 init_rwsem(&oi->ip_xattr_sem); 1631 mutex_init(&oi->ip_io_mutex); 1632 1633 oi->ip_blkno = 0ULL; 1634 oi->ip_clusters = 0; 1635 1636 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1637 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1638 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1639 1640 ocfs2_metadata_cache_init(&oi->vfs_inode); 1641 1642 inode_init_once(&oi->vfs_inode); 1643 } 1644 1645 static int ocfs2_initialize_mem_caches(void) 1646 { 1647 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1648 sizeof(struct ocfs2_inode_info), 1649 0, 1650 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1651 SLAB_MEM_SPREAD), 1652 ocfs2_inode_init_once); 1653 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1654 sizeof(struct ocfs2_dquot), 1655 0, 1656 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1657 SLAB_MEM_SPREAD), 1658 NULL); 1659 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1660 sizeof(struct ocfs2_quota_chunk), 1661 0, 1662 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1663 NULL); 1664 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1665 !ocfs2_qf_chunk_cachep) { 1666 if (ocfs2_inode_cachep) 1667 kmem_cache_destroy(ocfs2_inode_cachep); 1668 if (ocfs2_dquot_cachep) 1669 kmem_cache_destroy(ocfs2_dquot_cachep); 1670 if (ocfs2_qf_chunk_cachep) 1671 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1672 return -ENOMEM; 1673 } 1674 1675 return 0; 1676 } 1677 1678 static void ocfs2_free_mem_caches(void) 1679 { 1680 if (ocfs2_inode_cachep) 1681 kmem_cache_destroy(ocfs2_inode_cachep); 1682 ocfs2_inode_cachep = NULL; 1683 1684 if (ocfs2_dquot_cachep) 1685 kmem_cache_destroy(ocfs2_dquot_cachep); 1686 ocfs2_dquot_cachep = NULL; 1687 1688 if (ocfs2_qf_chunk_cachep) 1689 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1690 ocfs2_qf_chunk_cachep = NULL; 1691 } 1692 1693 static int ocfs2_get_sector(struct super_block *sb, 1694 struct buffer_head **bh, 1695 int block, 1696 int sect_size) 1697 { 1698 if (!sb_set_blocksize(sb, sect_size)) { 1699 mlog(ML_ERROR, "unable to set blocksize\n"); 1700 return -EIO; 1701 } 1702 1703 *bh = sb_getblk(sb, block); 1704 if (!*bh) { 1705 mlog_errno(-EIO); 1706 return -EIO; 1707 } 1708 lock_buffer(*bh); 1709 if (!buffer_dirty(*bh)) 1710 clear_buffer_uptodate(*bh); 1711 unlock_buffer(*bh); 1712 ll_rw_block(READ, 1, bh); 1713 wait_on_buffer(*bh); 1714 if (!buffer_uptodate(*bh)) { 1715 mlog_errno(-EIO); 1716 brelse(*bh); 1717 *bh = NULL; 1718 return -EIO; 1719 } 1720 1721 return 0; 1722 } 1723 1724 static int ocfs2_mount_volume(struct super_block *sb) 1725 { 1726 int status = 0; 1727 int unlock_super = 0; 1728 struct ocfs2_super *osb = OCFS2_SB(sb); 1729 1730 mlog_entry_void(); 1731 1732 if (ocfs2_is_hard_readonly(osb)) 1733 goto leave; 1734 1735 status = ocfs2_dlm_init(osb); 1736 if (status < 0) { 1737 mlog_errno(status); 1738 goto leave; 1739 } 1740 1741 status = ocfs2_super_lock(osb, 1); 1742 if (status < 0) { 1743 mlog_errno(status); 1744 goto leave; 1745 } 1746 unlock_super = 1; 1747 1748 /* This will load up the node map and add ourselves to it. */ 1749 status = ocfs2_find_slot(osb); 1750 if (status < 0) { 1751 mlog_errno(status); 1752 goto leave; 1753 } 1754 1755 /* load all node-local system inodes */ 1756 status = ocfs2_init_local_system_inodes(osb); 1757 if (status < 0) { 1758 mlog_errno(status); 1759 goto leave; 1760 } 1761 1762 status = ocfs2_check_volume(osb); 1763 if (status < 0) { 1764 mlog_errno(status); 1765 goto leave; 1766 } 1767 1768 status = ocfs2_truncate_log_init(osb); 1769 if (status < 0) { 1770 mlog_errno(status); 1771 goto leave; 1772 } 1773 1774 if (ocfs2_mount_local(osb)) 1775 goto leave; 1776 1777 leave: 1778 if (unlock_super) 1779 ocfs2_super_unlock(osb, 1); 1780 1781 mlog_exit(status); 1782 return status; 1783 } 1784 1785 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1786 { 1787 int tmp, hangup_needed = 0; 1788 struct ocfs2_super *osb = NULL; 1789 char nodestr[8]; 1790 1791 mlog_entry("(0x%p)\n", sb); 1792 1793 BUG_ON(!sb); 1794 osb = OCFS2_SB(sb); 1795 BUG_ON(!osb); 1796 1797 debugfs_remove(osb->osb_ctxt); 1798 1799 ocfs2_disable_quotas(osb); 1800 1801 ocfs2_shutdown_local_alloc(osb); 1802 1803 ocfs2_truncate_log_shutdown(osb); 1804 1805 /* This will disable recovery and flush any recovery work. */ 1806 ocfs2_recovery_exit(osb); 1807 1808 ocfs2_journal_shutdown(osb); 1809 1810 ocfs2_sync_blockdev(sb); 1811 1812 /* No cluster connection means we've failed during mount, so skip 1813 * all the steps which depended on that to complete. */ 1814 if (osb->cconn) { 1815 tmp = ocfs2_super_lock(osb, 1); 1816 if (tmp < 0) { 1817 mlog_errno(tmp); 1818 return; 1819 } 1820 } 1821 1822 if (osb->slot_num != OCFS2_INVALID_SLOT) 1823 ocfs2_put_slot(osb); 1824 1825 if (osb->cconn) 1826 ocfs2_super_unlock(osb, 1); 1827 1828 ocfs2_release_system_inodes(osb); 1829 1830 /* 1831 * If we're dismounting due to mount error, mount.ocfs2 will clean 1832 * up heartbeat. If we're a local mount, there is no heartbeat. 1833 * If we failed before we got a uuid_str yet, we can't stop 1834 * heartbeat. Otherwise, do it. 1835 */ 1836 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1837 hangup_needed = 1; 1838 1839 if (osb->cconn) 1840 ocfs2_dlm_shutdown(osb, hangup_needed); 1841 1842 debugfs_remove(osb->osb_debug_root); 1843 1844 if (hangup_needed) 1845 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1846 1847 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1848 1849 if (ocfs2_mount_local(osb)) 1850 snprintf(nodestr, sizeof(nodestr), "local"); 1851 else 1852 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1853 1854 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1855 osb->dev_str, nodestr); 1856 1857 ocfs2_delete_osb(osb); 1858 kfree(osb); 1859 sb->s_dev = 0; 1860 sb->s_fs_info = NULL; 1861 } 1862 1863 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1864 unsigned uuid_bytes) 1865 { 1866 int i, ret; 1867 char *ptr; 1868 1869 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1870 1871 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1872 if (osb->uuid_str == NULL) 1873 return -ENOMEM; 1874 1875 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1876 /* print with null */ 1877 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1878 if (ret != 2) /* drop super cleans up */ 1879 return -EINVAL; 1880 /* then only advance past the last char */ 1881 ptr += 2; 1882 } 1883 1884 return 0; 1885 } 1886 1887 static int ocfs2_initialize_super(struct super_block *sb, 1888 struct buffer_head *bh, 1889 int sector_size) 1890 { 1891 int status; 1892 int i, cbits, bbits; 1893 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1894 struct inode *inode = NULL; 1895 struct ocfs2_journal *journal; 1896 __le32 uuid_net_key; 1897 struct ocfs2_super *osb; 1898 1899 mlog_entry_void(); 1900 1901 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 1902 if (!osb) { 1903 status = -ENOMEM; 1904 mlog_errno(status); 1905 goto bail; 1906 } 1907 1908 sb->s_fs_info = osb; 1909 sb->s_op = &ocfs2_sops; 1910 sb->s_export_op = &ocfs2_export_ops; 1911 sb->s_qcop = &ocfs2_quotactl_ops; 1912 sb->dq_op = &ocfs2_quota_operations; 1913 sb->s_xattr = ocfs2_xattr_handlers; 1914 sb->s_time_gran = 1; 1915 sb->s_flags |= MS_NOATIME; 1916 /* this is needed to support O_LARGEFILE */ 1917 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1918 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 1919 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 1920 1921 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 1922 1923 for (i = 0; i < 3; i++) 1924 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 1925 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 1926 1927 osb->sb = sb; 1928 /* Save off for ocfs2_rw_direct */ 1929 osb->s_sectsize_bits = blksize_bits(sector_size); 1930 BUG_ON(!osb->s_sectsize_bits); 1931 1932 spin_lock_init(&osb->dc_task_lock); 1933 init_waitqueue_head(&osb->dc_event); 1934 osb->dc_work_sequence = 0; 1935 osb->dc_wake_sequence = 0; 1936 INIT_LIST_HEAD(&osb->blocked_lock_list); 1937 osb->blocked_lock_count = 0; 1938 spin_lock_init(&osb->osb_lock); 1939 spin_lock_init(&osb->osb_xattr_lock); 1940 ocfs2_init_inode_steal_slot(osb); 1941 1942 atomic_set(&osb->alloc_stats.moves, 0); 1943 atomic_set(&osb->alloc_stats.local_data, 0); 1944 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1945 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1946 atomic_set(&osb->alloc_stats.bg_extends, 0); 1947 1948 ocfs2_init_node_maps(osb); 1949 1950 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1951 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1952 1953 status = ocfs2_recovery_init(osb); 1954 if (status) { 1955 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 1956 mlog_errno(status); 1957 goto bail; 1958 } 1959 1960 init_waitqueue_head(&osb->checkpoint_event); 1961 atomic_set(&osb->needs_checkpoint, 0); 1962 1963 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1964 1965 osb->slot_num = OCFS2_INVALID_SLOT; 1966 1967 osb->s_xattr_inline_size = le16_to_cpu( 1968 di->id2.i_super.s_xattr_inline_size); 1969 1970 osb->local_alloc_state = OCFS2_LA_UNUSED; 1971 osb->local_alloc_bh = NULL; 1972 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 1973 1974 init_waitqueue_head(&osb->osb_mount_event); 1975 1976 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1977 if (!osb->vol_label) { 1978 mlog(ML_ERROR, "unable to alloc vol label\n"); 1979 status = -ENOMEM; 1980 goto bail; 1981 } 1982 1983 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1984 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1985 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1986 osb->max_slots); 1987 status = -EINVAL; 1988 goto bail; 1989 } 1990 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 1991 1992 osb->slot_recovery_generations = 1993 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 1994 GFP_KERNEL); 1995 if (!osb->slot_recovery_generations) { 1996 status = -ENOMEM; 1997 mlog_errno(status); 1998 goto bail; 1999 } 2000 2001 init_waitqueue_head(&osb->osb_wipe_event); 2002 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2003 sizeof(*osb->osb_orphan_wipes), 2004 GFP_KERNEL); 2005 if (!osb->osb_orphan_wipes) { 2006 status = -ENOMEM; 2007 mlog_errno(status); 2008 goto bail; 2009 } 2010 2011 osb->s_feature_compat = 2012 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2013 osb->s_feature_ro_compat = 2014 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2015 osb->s_feature_incompat = 2016 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2017 2018 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2019 mlog(ML_ERROR, "couldn't mount because of unsupported " 2020 "optional features (%x).\n", i); 2021 status = -EINVAL; 2022 goto bail; 2023 } 2024 if (!(osb->sb->s_flags & MS_RDONLY) && 2025 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2026 mlog(ML_ERROR, "couldn't mount RDWR because of " 2027 "unsupported optional features (%x).\n", i); 2028 status = -EINVAL; 2029 goto bail; 2030 } 2031 2032 if (ocfs2_userspace_stack(osb)) { 2033 memcpy(osb->osb_cluster_stack, 2034 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2035 OCFS2_STACK_LABEL_LEN); 2036 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2037 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2038 mlog(ML_ERROR, 2039 "couldn't mount because of an invalid " 2040 "cluster stack label (%s) \n", 2041 osb->osb_cluster_stack); 2042 status = -EINVAL; 2043 goto bail; 2044 } 2045 } else { 2046 /* The empty string is identical with classic tools that 2047 * don't know about s_cluster_info. */ 2048 osb->osb_cluster_stack[0] = '\0'; 2049 } 2050 2051 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2052 2053 /* FIXME 2054 * This should be done in ocfs2_journal_init(), but unknown 2055 * ordering issues will cause the filesystem to crash. 2056 * If anyone wants to figure out what part of the code 2057 * refers to osb->journal before ocfs2_journal_init() is run, 2058 * be my guest. 2059 */ 2060 /* initialize our journal structure */ 2061 2062 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2063 if (!journal) { 2064 mlog(ML_ERROR, "unable to alloc journal\n"); 2065 status = -ENOMEM; 2066 goto bail; 2067 } 2068 osb->journal = journal; 2069 journal->j_osb = osb; 2070 2071 atomic_set(&journal->j_num_trans, 0); 2072 init_rwsem(&journal->j_trans_barrier); 2073 init_waitqueue_head(&journal->j_checkpointed); 2074 spin_lock_init(&journal->j_lock); 2075 journal->j_trans_id = (unsigned long) 1; 2076 INIT_LIST_HEAD(&journal->j_la_cleanups); 2077 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2078 journal->j_state = OCFS2_JOURNAL_FREE; 2079 2080 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2081 osb->dentry_lock_list = NULL; 2082 2083 /* get some pseudo constants for clustersize bits */ 2084 osb->s_clustersize_bits = 2085 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2086 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2087 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 2088 2089 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2090 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2091 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2092 osb->s_clustersize); 2093 status = -EINVAL; 2094 goto bail; 2095 } 2096 2097 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 2098 > (u32)~0UL) { 2099 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 2100 "what jbd can address in 32 bits.\n"); 2101 status = -EINVAL; 2102 goto bail; 2103 } 2104 2105 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2106 sizeof(di->id2.i_super.s_uuid))) { 2107 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2108 status = -ENOMEM; 2109 goto bail; 2110 } 2111 2112 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2113 2114 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2115 osb->vol_label[63] = '\0'; 2116 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2117 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2118 osb->first_cluster_group_blkno = 2119 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2120 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2121 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2122 mlog(0, "vol_label: %s\n", osb->vol_label); 2123 mlog(0, "uuid: %s\n", osb->uuid_str); 2124 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 2125 (unsigned long long)osb->root_blkno, 2126 (unsigned long long)osb->system_dir_blkno); 2127 2128 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2129 if (!osb->osb_dlm_debug) { 2130 status = -ENOMEM; 2131 mlog_errno(status); 2132 goto bail; 2133 } 2134 2135 atomic_set(&osb->vol_state, VOLUME_INIT); 2136 2137 /* load root, system_dir, and all global system inodes */ 2138 status = ocfs2_init_global_system_inodes(osb); 2139 if (status < 0) { 2140 mlog_errno(status); 2141 goto bail; 2142 } 2143 2144 /* 2145 * global bitmap 2146 */ 2147 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2148 OCFS2_INVALID_SLOT); 2149 if (!inode) { 2150 status = -EINVAL; 2151 mlog_errno(status); 2152 goto bail; 2153 } 2154 2155 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2156 iput(inode); 2157 2158 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8; 2159 2160 status = ocfs2_init_slot_info(osb); 2161 if (status < 0) { 2162 mlog_errno(status); 2163 goto bail; 2164 } 2165 2166 bail: 2167 mlog_exit(status); 2168 return status; 2169 } 2170 2171 /* 2172 * will return: -EAGAIN if it is ok to keep searching for superblocks 2173 * -EINVAL if there is a bad superblock 2174 * 0 on success 2175 */ 2176 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2177 struct buffer_head *bh, 2178 u32 blksz) 2179 { 2180 int status = -EAGAIN; 2181 2182 mlog_entry_void(); 2183 2184 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2185 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2186 /* We have to do a raw check of the feature here */ 2187 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2188 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2189 status = ocfs2_block_check_validate(bh->b_data, 2190 bh->b_size, 2191 &di->i_check); 2192 if (status) 2193 goto out; 2194 } 2195 status = -EINVAL; 2196 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2197 mlog(ML_ERROR, "found superblock with incorrect block " 2198 "size: found %u, should be %u\n", 2199 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2200 blksz); 2201 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2202 OCFS2_MAJOR_REV_LEVEL || 2203 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2204 OCFS2_MINOR_REV_LEVEL) { 2205 mlog(ML_ERROR, "found superblock with bad version: " 2206 "found %u.%u, should be %u.%u\n", 2207 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2208 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2209 OCFS2_MAJOR_REV_LEVEL, 2210 OCFS2_MINOR_REV_LEVEL); 2211 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2212 mlog(ML_ERROR, "bad block number on superblock: " 2213 "found %llu, should be %llu\n", 2214 (unsigned long long)le64_to_cpu(di->i_blkno), 2215 (unsigned long long)bh->b_blocknr); 2216 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2217 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2218 mlog(ML_ERROR, "bad cluster size found: %u\n", 2219 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2220 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2221 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2222 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2223 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2224 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2225 mlog(ML_ERROR, 2226 "Superblock slots found greater than file system " 2227 "maximum: found %u, max %u\n", 2228 le16_to_cpu(di->id2.i_super.s_max_slots), 2229 OCFS2_MAX_SLOTS); 2230 } else { 2231 /* found it! */ 2232 status = 0; 2233 } 2234 } 2235 2236 out: 2237 mlog_exit(status); 2238 return status; 2239 } 2240 2241 static int ocfs2_check_volume(struct ocfs2_super *osb) 2242 { 2243 int status; 2244 int dirty; 2245 int local; 2246 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2247 * recover 2248 * ourselves. */ 2249 2250 mlog_entry_void(); 2251 2252 /* Init our journal object. */ 2253 status = ocfs2_journal_init(osb->journal, &dirty); 2254 if (status < 0) { 2255 mlog(ML_ERROR, "Could not initialize journal!\n"); 2256 goto finally; 2257 } 2258 2259 /* If the journal was unmounted cleanly then we don't want to 2260 * recover anything. Otherwise, journal_load will do that 2261 * dirty work for us :) */ 2262 if (!dirty) { 2263 status = ocfs2_journal_wipe(osb->journal, 0); 2264 if (status < 0) { 2265 mlog_errno(status); 2266 goto finally; 2267 } 2268 } else { 2269 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2270 "recovering volume.\n"); 2271 } 2272 2273 local = ocfs2_mount_local(osb); 2274 2275 /* will play back anything left in the journal. */ 2276 status = ocfs2_journal_load(osb->journal, local, dirty); 2277 if (status < 0) { 2278 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2279 goto finally; 2280 } 2281 2282 if (dirty) { 2283 /* recover my local alloc if we didn't unmount cleanly. */ 2284 status = ocfs2_begin_local_alloc_recovery(osb, 2285 osb->slot_num, 2286 &local_alloc); 2287 if (status < 0) { 2288 mlog_errno(status); 2289 goto finally; 2290 } 2291 /* we complete the recovery process after we've marked 2292 * ourselves as mounted. */ 2293 } 2294 2295 mlog(0, "Journal loaded.\n"); 2296 2297 status = ocfs2_load_local_alloc(osb); 2298 if (status < 0) { 2299 mlog_errno(status); 2300 goto finally; 2301 } 2302 2303 if (dirty) { 2304 /* Recovery will be completed after we've mounted the 2305 * rest of the volume. */ 2306 osb->dirty = 1; 2307 osb->local_alloc_copy = local_alloc; 2308 local_alloc = NULL; 2309 } 2310 2311 /* go through each journal, trylock it and if you get the 2312 * lock, and it's marked as dirty, set the bit in the recover 2313 * map and launch a recovery thread for it. */ 2314 status = ocfs2_mark_dead_nodes(osb); 2315 if (status < 0) { 2316 mlog_errno(status); 2317 goto finally; 2318 } 2319 2320 status = ocfs2_compute_replay_slots(osb); 2321 if (status < 0) 2322 mlog_errno(status); 2323 2324 finally: 2325 if (local_alloc) 2326 kfree(local_alloc); 2327 2328 mlog_exit(status); 2329 return status; 2330 } 2331 2332 /* 2333 * The routine gets called from dismount or close whenever a dismount on 2334 * volume is requested and the osb open count becomes 1. 2335 * It will remove the osb from the global list and also free up all the 2336 * initialized resources and fileobject. 2337 */ 2338 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2339 { 2340 mlog_entry_void(); 2341 2342 /* This function assumes that the caller has the main osb resource */ 2343 2344 ocfs2_free_slot_info(osb); 2345 2346 kfree(osb->osb_orphan_wipes); 2347 kfree(osb->slot_recovery_generations); 2348 /* FIXME 2349 * This belongs in journal shutdown, but because we have to 2350 * allocate osb->journal at the start of ocfs2_initalize_osb(), 2351 * we free it here. 2352 */ 2353 kfree(osb->journal); 2354 if (osb->local_alloc_copy) 2355 kfree(osb->local_alloc_copy); 2356 kfree(osb->uuid_str); 2357 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2358 memset(osb, 0, sizeof(struct ocfs2_super)); 2359 2360 mlog_exit_void(); 2361 } 2362 2363 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2364 * panic(). We do not support continue-on-error operation. */ 2365 static void ocfs2_handle_error(struct super_block *sb) 2366 { 2367 struct ocfs2_super *osb = OCFS2_SB(sb); 2368 2369 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2370 panic("OCFS2: (device %s): panic forced after error\n", 2371 sb->s_id); 2372 2373 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2374 2375 if (sb->s_flags & MS_RDONLY && 2376 (ocfs2_is_soft_readonly(osb) || 2377 ocfs2_is_hard_readonly(osb))) 2378 return; 2379 2380 printk(KERN_CRIT "File system is now read-only due to the potential " 2381 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2382 "system is unmounted.\n"); 2383 sb->s_flags |= MS_RDONLY; 2384 ocfs2_set_ro_flag(osb, 0); 2385 } 2386 2387 static char error_buf[1024]; 2388 2389 void __ocfs2_error(struct super_block *sb, 2390 const char *function, 2391 const char *fmt, ...) 2392 { 2393 va_list args; 2394 2395 va_start(args, fmt); 2396 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2397 va_end(args); 2398 2399 /* Not using mlog here because we want to show the actual 2400 * function the error came from. */ 2401 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2402 sb->s_id, function, error_buf); 2403 2404 ocfs2_handle_error(sb); 2405 } 2406 2407 /* Handle critical errors. This is intentionally more drastic than 2408 * ocfs2_handle_error, so we only use for things like journal errors, 2409 * etc. */ 2410 void __ocfs2_abort(struct super_block* sb, 2411 const char *function, 2412 const char *fmt, ...) 2413 { 2414 va_list args; 2415 2416 va_start(args, fmt); 2417 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2418 va_end(args); 2419 2420 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2421 sb->s_id, function, error_buf); 2422 2423 /* We don't have the cluster support yet to go straight to 2424 * hard readonly in here. Until then, we want to keep 2425 * ocfs2_abort() so that we can at least mark critical 2426 * errors. 2427 * 2428 * TODO: This should abort the journal and alert other nodes 2429 * that our slot needs recovery. */ 2430 2431 /* Force a panic(). This stinks, but it's better than letting 2432 * things continue without having a proper hard readonly 2433 * here. */ 2434 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2435 ocfs2_handle_error(sb); 2436 } 2437 2438 module_init(ocfs2_init); 2439 module_exit(ocfs2_exit); 2440