1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/init.h> 32 #include <linux/random.h> 33 #include <linux/statfs.h> 34 #include <linux/moduleparam.h> 35 #include <linux/blkdev.h> 36 #include <linux/socket.h> 37 #include <linux/inet.h> 38 #include <linux/parser.h> 39 #include <linux/crc32.h> 40 #include <linux/debugfs.h> 41 #include <linux/mount.h> 42 #include <linux/seq_file.h> 43 #include <linux/quotaops.h> 44 #include <linux/smp_lock.h> 45 46 #define MLOG_MASK_PREFIX ML_SUPER 47 #include <cluster/masklog.h> 48 49 #include "ocfs2.h" 50 51 /* this should be the only file to include a version 1 header */ 52 #include "ocfs1_fs_compat.h" 53 54 #include "alloc.h" 55 #include "blockcheck.h" 56 #include "dlmglue.h" 57 #include "export.h" 58 #include "extent_map.h" 59 #include "heartbeat.h" 60 #include "inode.h" 61 #include "journal.h" 62 #include "localalloc.h" 63 #include "namei.h" 64 #include "slot_map.h" 65 #include "super.h" 66 #include "sysfile.h" 67 #include "uptodate.h" 68 #include "ver.h" 69 #include "xattr.h" 70 #include "quota.h" 71 #include "refcounttree.h" 72 73 #include "buffer_head_io.h" 74 75 static struct kmem_cache *ocfs2_inode_cachep = NULL; 76 struct kmem_cache *ocfs2_dquot_cachep; 77 struct kmem_cache *ocfs2_qf_chunk_cachep; 78 79 /* OCFS2 needs to schedule several differnt types of work which 80 * require cluster locking, disk I/O, recovery waits, etc. Since these 81 * types of work tend to be heavy we avoid using the kernel events 82 * workqueue and schedule on our own. */ 83 struct workqueue_struct *ocfs2_wq = NULL; 84 85 static struct dentry *ocfs2_debugfs_root = NULL; 86 87 MODULE_AUTHOR("Oracle"); 88 MODULE_LICENSE("GPL"); 89 90 struct mount_options 91 { 92 unsigned long commit_interval; 93 unsigned long mount_opt; 94 unsigned int atime_quantum; 95 signed short slot; 96 unsigned int localalloc_opt; 97 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 98 }; 99 100 static int ocfs2_parse_options(struct super_block *sb, char *options, 101 struct mount_options *mopt, 102 int is_remount); 103 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 104 static void ocfs2_put_super(struct super_block *sb); 105 static int ocfs2_mount_volume(struct super_block *sb); 106 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 107 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 108 static int ocfs2_initialize_mem_caches(void); 109 static void ocfs2_free_mem_caches(void); 110 static void ocfs2_delete_osb(struct ocfs2_super *osb); 111 112 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 113 114 static int ocfs2_sync_fs(struct super_block *sb, int wait); 115 116 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 117 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 118 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 119 static int ocfs2_check_volume(struct ocfs2_super *osb); 120 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 121 struct buffer_head *bh, 122 u32 sectsize, 123 struct ocfs2_blockcheck_stats *stats); 124 static int ocfs2_initialize_super(struct super_block *sb, 125 struct buffer_head *bh, 126 int sector_size, 127 struct ocfs2_blockcheck_stats *stats); 128 static int ocfs2_get_sector(struct super_block *sb, 129 struct buffer_head **bh, 130 int block, 131 int sect_size); 132 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 133 static void ocfs2_destroy_inode(struct inode *inode); 134 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 135 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 136 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 137 138 static const struct super_operations ocfs2_sops = { 139 .statfs = ocfs2_statfs, 140 .alloc_inode = ocfs2_alloc_inode, 141 .destroy_inode = ocfs2_destroy_inode, 142 .drop_inode = ocfs2_drop_inode, 143 .clear_inode = ocfs2_clear_inode, 144 .delete_inode = ocfs2_delete_inode, 145 .sync_fs = ocfs2_sync_fs, 146 .put_super = ocfs2_put_super, 147 .remount_fs = ocfs2_remount, 148 .show_options = ocfs2_show_options, 149 .quota_read = ocfs2_quota_read, 150 .quota_write = ocfs2_quota_write, 151 }; 152 153 enum { 154 Opt_barrier, 155 Opt_err_panic, 156 Opt_err_ro, 157 Opt_intr, 158 Opt_nointr, 159 Opt_hb_none, 160 Opt_hb_local, 161 Opt_data_ordered, 162 Opt_data_writeback, 163 Opt_atime_quantum, 164 Opt_slot, 165 Opt_commit, 166 Opt_localalloc, 167 Opt_localflocks, 168 Opt_stack, 169 Opt_user_xattr, 170 Opt_nouser_xattr, 171 Opt_inode64, 172 Opt_acl, 173 Opt_noacl, 174 Opt_usrquota, 175 Opt_grpquota, 176 Opt_err, 177 }; 178 179 static const match_table_t tokens = { 180 {Opt_barrier, "barrier=%u"}, 181 {Opt_err_panic, "errors=panic"}, 182 {Opt_err_ro, "errors=remount-ro"}, 183 {Opt_intr, "intr"}, 184 {Opt_nointr, "nointr"}, 185 {Opt_hb_none, OCFS2_HB_NONE}, 186 {Opt_hb_local, OCFS2_HB_LOCAL}, 187 {Opt_data_ordered, "data=ordered"}, 188 {Opt_data_writeback, "data=writeback"}, 189 {Opt_atime_quantum, "atime_quantum=%u"}, 190 {Opt_slot, "preferred_slot=%u"}, 191 {Opt_commit, "commit=%u"}, 192 {Opt_localalloc, "localalloc=%d"}, 193 {Opt_localflocks, "localflocks"}, 194 {Opt_stack, "cluster_stack=%s"}, 195 {Opt_user_xattr, "user_xattr"}, 196 {Opt_nouser_xattr, "nouser_xattr"}, 197 {Opt_inode64, "inode64"}, 198 {Opt_acl, "acl"}, 199 {Opt_noacl, "noacl"}, 200 {Opt_usrquota, "usrquota"}, 201 {Opt_grpquota, "grpquota"}, 202 {Opt_err, NULL} 203 }; 204 205 #ifdef CONFIG_DEBUG_FS 206 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 207 { 208 struct ocfs2_cluster_connection *cconn = osb->cconn; 209 struct ocfs2_recovery_map *rm = osb->recovery_map; 210 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 211 int i, out = 0; 212 213 out += snprintf(buf + out, len - out, 214 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 215 "Device", osb->dev_str, osb->uuid_str, 216 osb->fs_generation, osb->vol_label); 217 218 out += snprintf(buf + out, len - out, 219 "%10s => State: %d Flags: 0x%lX\n", "Volume", 220 atomic_read(&osb->vol_state), osb->osb_flags); 221 222 out += snprintf(buf + out, len - out, 223 "%10s => Block: %lu Cluster: %d\n", "Sizes", 224 osb->sb->s_blocksize, osb->s_clustersize); 225 226 out += snprintf(buf + out, len - out, 227 "%10s => Compat: 0x%X Incompat: 0x%X " 228 "ROcompat: 0x%X\n", 229 "Features", osb->s_feature_compat, 230 osb->s_feature_incompat, osb->s_feature_ro_compat); 231 232 out += snprintf(buf + out, len - out, 233 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 234 osb->s_mount_opt, osb->s_atime_quantum); 235 236 if (cconn) { 237 out += snprintf(buf + out, len - out, 238 "%10s => Stack: %s Name: %*s " 239 "Version: %d.%d\n", "Cluster", 240 (*osb->osb_cluster_stack == '\0' ? 241 "o2cb" : osb->osb_cluster_stack), 242 cconn->cc_namelen, cconn->cc_name, 243 cconn->cc_version.pv_major, 244 cconn->cc_version.pv_minor); 245 } 246 247 spin_lock(&osb->dc_task_lock); 248 out += snprintf(buf + out, len - out, 249 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 250 "WorkSeq: %lu\n", "DownCnvt", 251 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 252 osb->blocked_lock_count, osb->dc_wake_sequence, 253 osb->dc_work_sequence); 254 spin_unlock(&osb->dc_task_lock); 255 256 spin_lock(&osb->osb_lock); 257 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 258 "Recovery", 259 (osb->recovery_thread_task ? 260 task_pid_nr(osb->recovery_thread_task) : -1)); 261 if (rm->rm_used == 0) 262 out += snprintf(buf + out, len - out, " None\n"); 263 else { 264 for (i = 0; i < rm->rm_used; i++) 265 out += snprintf(buf + out, len - out, " %d", 266 rm->rm_entries[i]); 267 out += snprintf(buf + out, len - out, "\n"); 268 } 269 spin_unlock(&osb->osb_lock); 270 271 out += snprintf(buf + out, len - out, 272 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 273 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 274 osb->osb_commit_interval, 275 atomic_read(&osb->needs_checkpoint)); 276 277 out += snprintf(buf + out, len - out, 278 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 279 "Journal", osb->journal->j_state, 280 osb->journal->j_trans_id, 281 atomic_read(&osb->journal->j_num_trans)); 282 283 out += snprintf(buf + out, len - out, 284 "%10s => GlobalAllocs: %d LocalAllocs: %d " 285 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 286 "Stats", 287 atomic_read(&osb->alloc_stats.bitmap_data), 288 atomic_read(&osb->alloc_stats.local_data), 289 atomic_read(&osb->alloc_stats.bg_allocs), 290 atomic_read(&osb->alloc_stats.moves), 291 atomic_read(&osb->alloc_stats.bg_extends)); 292 293 out += snprintf(buf + out, len - out, 294 "%10s => State: %u Descriptor: %llu Size: %u bits " 295 "Default: %u bits\n", 296 "LocalAlloc", osb->local_alloc_state, 297 (unsigned long long)osb->la_last_gd, 298 osb->local_alloc_bits, osb->local_alloc_default_bits); 299 300 spin_lock(&osb->osb_lock); 301 out += snprintf(buf + out, len - out, 302 "%10s => Slot: %d NumStolen: %d\n", "Steal", 303 osb->s_inode_steal_slot, 304 atomic_read(&osb->s_num_inodes_stolen)); 305 spin_unlock(&osb->osb_lock); 306 307 out += snprintf(buf + out, len - out, "OrphanScan => "); 308 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 309 os->os_count, os->os_seqno); 310 out += snprintf(buf + out, len - out, " Last Scan: "); 311 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 312 out += snprintf(buf + out, len - out, "Disabled\n"); 313 else 314 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 315 (get_seconds() - os->os_scantime.tv_sec)); 316 317 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 318 "Slots", "Num", "RecoGen"); 319 for (i = 0; i < osb->max_slots; ++i) { 320 out += snprintf(buf + out, len - out, 321 "%10s %c %3d %10d\n", 322 " ", 323 (i == osb->slot_num ? '*' : ' '), 324 i, osb->slot_recovery_generations[i]); 325 } 326 327 return out; 328 } 329 330 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 331 { 332 struct ocfs2_super *osb = inode->i_private; 333 char *buf = NULL; 334 335 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 336 if (!buf) 337 goto bail; 338 339 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 340 341 file->private_data = buf; 342 343 return 0; 344 bail: 345 return -ENOMEM; 346 } 347 348 static int ocfs2_debug_release(struct inode *inode, struct file *file) 349 { 350 kfree(file->private_data); 351 return 0; 352 } 353 354 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 355 size_t nbytes, loff_t *ppos) 356 { 357 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 358 i_size_read(file->f_mapping->host)); 359 } 360 #else 361 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 362 { 363 return 0; 364 } 365 static int ocfs2_debug_release(struct inode *inode, struct file *file) 366 { 367 return 0; 368 } 369 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 370 size_t nbytes, loff_t *ppos) 371 { 372 return 0; 373 } 374 #endif /* CONFIG_DEBUG_FS */ 375 376 static const struct file_operations ocfs2_osb_debug_fops = { 377 .open = ocfs2_osb_debug_open, 378 .release = ocfs2_debug_release, 379 .read = ocfs2_debug_read, 380 .llseek = generic_file_llseek, 381 }; 382 383 static int ocfs2_sync_fs(struct super_block *sb, int wait) 384 { 385 int status; 386 tid_t target; 387 struct ocfs2_super *osb = OCFS2_SB(sb); 388 389 if (ocfs2_is_hard_readonly(osb)) 390 return -EROFS; 391 392 if (wait) { 393 status = ocfs2_flush_truncate_log(osb); 394 if (status < 0) 395 mlog_errno(status); 396 } else { 397 ocfs2_schedule_truncate_log_flush(osb, 0); 398 } 399 400 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 401 &target)) { 402 if (wait) 403 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 404 target); 405 } 406 return 0; 407 } 408 409 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 410 { 411 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 412 && (ino == USER_QUOTA_SYSTEM_INODE 413 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 414 return 0; 415 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 416 && (ino == GROUP_QUOTA_SYSTEM_INODE 417 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 418 return 0; 419 return 1; 420 } 421 422 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 423 { 424 struct inode *new = NULL; 425 int status = 0; 426 int i; 427 428 mlog_entry_void(); 429 430 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 431 if (IS_ERR(new)) { 432 status = PTR_ERR(new); 433 mlog_errno(status); 434 goto bail; 435 } 436 osb->root_inode = new; 437 438 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 439 if (IS_ERR(new)) { 440 status = PTR_ERR(new); 441 mlog_errno(status); 442 goto bail; 443 } 444 osb->sys_root_inode = new; 445 446 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 447 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 448 if (!ocfs2_need_system_inode(osb, i)) 449 continue; 450 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 451 if (!new) { 452 ocfs2_release_system_inodes(osb); 453 status = -EINVAL; 454 mlog_errno(status); 455 /* FIXME: Should ERROR_RO_FS */ 456 mlog(ML_ERROR, "Unable to load system inode %d, " 457 "possibly corrupt fs?", i); 458 goto bail; 459 } 460 // the array now has one ref, so drop this one 461 iput(new); 462 } 463 464 bail: 465 mlog_exit(status); 466 return status; 467 } 468 469 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 470 { 471 struct inode *new = NULL; 472 int status = 0; 473 int i; 474 475 mlog_entry_void(); 476 477 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 478 i < NUM_SYSTEM_INODES; 479 i++) { 480 if (!ocfs2_need_system_inode(osb, i)) 481 continue; 482 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 483 if (!new) { 484 ocfs2_release_system_inodes(osb); 485 status = -EINVAL; 486 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 487 status, i, osb->slot_num); 488 goto bail; 489 } 490 /* the array now has one ref, so drop this one */ 491 iput(new); 492 } 493 494 bail: 495 mlog_exit(status); 496 return status; 497 } 498 499 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 500 { 501 int i; 502 struct inode *inode; 503 504 mlog_entry_void(); 505 506 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 507 inode = osb->system_inodes[i]; 508 if (inode) { 509 iput(inode); 510 osb->system_inodes[i] = NULL; 511 } 512 } 513 514 inode = osb->sys_root_inode; 515 if (inode) { 516 iput(inode); 517 osb->sys_root_inode = NULL; 518 } 519 520 inode = osb->root_inode; 521 if (inode) { 522 iput(inode); 523 osb->root_inode = NULL; 524 } 525 526 mlog_exit(0); 527 } 528 529 /* We're allocating fs objects, use GFP_NOFS */ 530 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 531 { 532 struct ocfs2_inode_info *oi; 533 534 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 535 if (!oi) 536 return NULL; 537 538 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 539 return &oi->vfs_inode; 540 } 541 542 static void ocfs2_destroy_inode(struct inode *inode) 543 { 544 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 545 } 546 547 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 548 unsigned int cbits) 549 { 550 unsigned int bytes = 1 << cbits; 551 unsigned int trim = bytes; 552 unsigned int bitshift = 32; 553 554 /* 555 * i_size and all block offsets in ocfs2 are always 64 bits 556 * wide. i_clusters is 32 bits, in cluster-sized units. So on 557 * 64 bit platforms, cluster size will be the limiting factor. 558 */ 559 560 #if BITS_PER_LONG == 32 561 # if defined(CONFIG_LBDAF) 562 BUILD_BUG_ON(sizeof(sector_t) != 8); 563 /* 564 * We might be limited by page cache size. 565 */ 566 if (bytes > PAGE_CACHE_SIZE) { 567 bytes = PAGE_CACHE_SIZE; 568 trim = 1; 569 /* 570 * Shift by 31 here so that we don't get larger than 571 * MAX_LFS_FILESIZE 572 */ 573 bitshift = 31; 574 } 575 # else 576 /* 577 * We are limited by the size of sector_t. Use block size, as 578 * that's what we expose to the VFS. 579 */ 580 bytes = 1 << bbits; 581 trim = 1; 582 bitshift = 31; 583 # endif 584 #endif 585 586 /* 587 * Trim by a whole cluster when we can actually approach the 588 * on-disk limits. Otherwise we can overflow i_clusters when 589 * an extent start is at the max offset. 590 */ 591 return (((unsigned long long)bytes) << bitshift) - trim; 592 } 593 594 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 595 { 596 int incompat_features; 597 int ret = 0; 598 struct mount_options parsed_options; 599 struct ocfs2_super *osb = OCFS2_SB(sb); 600 601 lock_kernel(); 602 603 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 604 ret = -EINVAL; 605 goto out; 606 } 607 608 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 609 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 610 ret = -EINVAL; 611 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 612 goto out; 613 } 614 615 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 616 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 617 ret = -EINVAL; 618 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 619 goto out; 620 } 621 622 /* Probably don't want this on remount; it might 623 * mess with other nodes */ 624 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 625 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 626 ret = -EINVAL; 627 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 628 goto out; 629 } 630 631 /* We're going to/from readonly mode. */ 632 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 633 /* Disable quota accounting before remounting RO */ 634 if (*flags & MS_RDONLY) { 635 ret = ocfs2_susp_quotas(osb, 0); 636 if (ret < 0) 637 goto out; 638 } 639 /* Lock here so the check of HARD_RO and the potential 640 * setting of SOFT_RO is atomic. */ 641 spin_lock(&osb->osb_lock); 642 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 643 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 644 ret = -EROFS; 645 goto unlock_osb; 646 } 647 648 if (*flags & MS_RDONLY) { 649 mlog(0, "Going to ro mode.\n"); 650 sb->s_flags |= MS_RDONLY; 651 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 652 } else { 653 mlog(0, "Making ro filesystem writeable.\n"); 654 655 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 656 mlog(ML_ERROR, "Cannot remount RDWR " 657 "filesystem due to previous errors.\n"); 658 ret = -EROFS; 659 goto unlock_osb; 660 } 661 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 662 if (incompat_features) { 663 mlog(ML_ERROR, "Cannot remount RDWR because " 664 "of unsupported optional features " 665 "(%x).\n", incompat_features); 666 ret = -EINVAL; 667 goto unlock_osb; 668 } 669 sb->s_flags &= ~MS_RDONLY; 670 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 671 } 672 unlock_osb: 673 spin_unlock(&osb->osb_lock); 674 /* Enable quota accounting after remounting RW */ 675 if (!ret && !(*flags & MS_RDONLY)) { 676 if (sb_any_quota_suspended(sb)) 677 ret = ocfs2_susp_quotas(osb, 1); 678 else 679 ret = ocfs2_enable_quotas(osb); 680 if (ret < 0) { 681 /* Return back changes... */ 682 spin_lock(&osb->osb_lock); 683 sb->s_flags |= MS_RDONLY; 684 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 685 spin_unlock(&osb->osb_lock); 686 goto out; 687 } 688 } 689 } 690 691 if (!ret) { 692 /* Only save off the new mount options in case of a successful 693 * remount. */ 694 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)) 695 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 696 osb->s_mount_opt = parsed_options.mount_opt; 697 osb->s_atime_quantum = parsed_options.atime_quantum; 698 osb->preferred_slot = parsed_options.slot; 699 if (parsed_options.commit_interval) 700 osb->osb_commit_interval = parsed_options.commit_interval; 701 702 if (!ocfs2_is_hard_readonly(osb)) 703 ocfs2_set_journal_params(osb); 704 } 705 out: 706 unlock_kernel(); 707 return ret; 708 } 709 710 static int ocfs2_sb_probe(struct super_block *sb, 711 struct buffer_head **bh, 712 int *sector_size, 713 struct ocfs2_blockcheck_stats *stats) 714 { 715 int status, tmpstat; 716 struct ocfs1_vol_disk_hdr *hdr; 717 struct ocfs2_dinode *di; 718 int blksize; 719 720 *bh = NULL; 721 722 /* may be > 512 */ 723 *sector_size = bdev_logical_block_size(sb->s_bdev); 724 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 725 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 726 *sector_size, OCFS2_MAX_BLOCKSIZE); 727 status = -EINVAL; 728 goto bail; 729 } 730 731 /* Can this really happen? */ 732 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 733 *sector_size = OCFS2_MIN_BLOCKSIZE; 734 735 /* check block zero for old format */ 736 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 737 if (status < 0) { 738 mlog_errno(status); 739 goto bail; 740 } 741 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 742 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 743 mlog(ML_ERROR, "incompatible version: %u.%u\n", 744 hdr->major_version, hdr->minor_version); 745 status = -EINVAL; 746 } 747 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 748 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 749 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 750 hdr->signature); 751 status = -EINVAL; 752 } 753 brelse(*bh); 754 *bh = NULL; 755 if (status < 0) { 756 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 757 "upgraded before mounting with ocfs v2\n"); 758 goto bail; 759 } 760 761 /* 762 * Now check at magic offset for 512, 1024, 2048, 4096 763 * blocksizes. 4096 is the maximum blocksize because it is 764 * the minimum clustersize. 765 */ 766 status = -EINVAL; 767 for (blksize = *sector_size; 768 blksize <= OCFS2_MAX_BLOCKSIZE; 769 blksize <<= 1) { 770 tmpstat = ocfs2_get_sector(sb, bh, 771 OCFS2_SUPER_BLOCK_BLKNO, 772 blksize); 773 if (tmpstat < 0) { 774 status = tmpstat; 775 mlog_errno(status); 776 goto bail; 777 } 778 di = (struct ocfs2_dinode *) (*bh)->b_data; 779 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 780 spin_lock_init(&stats->b_lock); 781 status = ocfs2_verify_volume(di, *bh, blksize, stats); 782 if (status >= 0) 783 goto bail; 784 brelse(*bh); 785 *bh = NULL; 786 if (status != -EAGAIN) 787 break; 788 } 789 790 bail: 791 return status; 792 } 793 794 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 795 { 796 if (ocfs2_mount_local(osb)) { 797 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 798 mlog(ML_ERROR, "Cannot heartbeat on a locally " 799 "mounted device.\n"); 800 return -EINVAL; 801 } 802 } 803 804 if (ocfs2_userspace_stack(osb)) { 805 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 806 mlog(ML_ERROR, "Userspace stack expected, but " 807 "o2cb heartbeat arguments passed to mount\n"); 808 return -EINVAL; 809 } 810 } 811 812 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 813 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 814 !ocfs2_userspace_stack(osb)) { 815 mlog(ML_ERROR, "Heartbeat has to be started to mount " 816 "a read-write clustered device.\n"); 817 return -EINVAL; 818 } 819 } 820 821 return 0; 822 } 823 824 /* 825 * If we're using a userspace stack, mount should have passed 826 * a name that matches the disk. If not, mount should not 827 * have passed a stack. 828 */ 829 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 830 struct mount_options *mopt) 831 { 832 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 833 mlog(ML_ERROR, 834 "cluster stack passed to mount, but this filesystem " 835 "does not support it\n"); 836 return -EINVAL; 837 } 838 839 if (ocfs2_userspace_stack(osb) && 840 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 841 OCFS2_STACK_LABEL_LEN)) { 842 mlog(ML_ERROR, 843 "cluster stack passed to mount (\"%s\") does not " 844 "match the filesystem (\"%s\")\n", 845 mopt->cluster_stack, 846 osb->osb_cluster_stack); 847 return -EINVAL; 848 } 849 850 return 0; 851 } 852 853 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 854 { 855 int type; 856 struct super_block *sb = osb->sb; 857 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 858 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 859 int status = 0; 860 861 for (type = 0; type < MAXQUOTAS; type++) { 862 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 863 continue; 864 if (unsuspend) 865 status = vfs_quota_enable( 866 sb_dqopt(sb)->files[type], 867 type, QFMT_OCFS2, 868 DQUOT_SUSPENDED); 869 else 870 status = vfs_quota_disable(sb, type, 871 DQUOT_SUSPENDED); 872 if (status < 0) 873 break; 874 } 875 if (status < 0) 876 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 877 "remount (error = %d).\n", status); 878 return status; 879 } 880 881 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 882 { 883 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 884 struct super_block *sb = osb->sb; 885 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 886 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 887 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 888 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 889 int status; 890 int type; 891 892 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 893 for (type = 0; type < MAXQUOTAS; type++) { 894 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 895 continue; 896 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 897 osb->slot_num); 898 if (!inode[type]) { 899 status = -ENOENT; 900 goto out_quota_off; 901 } 902 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2, 903 DQUOT_USAGE_ENABLED); 904 if (status < 0) 905 goto out_quota_off; 906 } 907 908 for (type = 0; type < MAXQUOTAS; type++) 909 iput(inode[type]); 910 return 0; 911 out_quota_off: 912 ocfs2_disable_quotas(osb); 913 for (type = 0; type < MAXQUOTAS; type++) 914 iput(inode[type]); 915 mlog_errno(status); 916 return status; 917 } 918 919 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 920 { 921 int type; 922 struct inode *inode; 923 struct super_block *sb = osb->sb; 924 925 /* We mostly ignore errors in this function because there's not much 926 * we can do when we see them */ 927 for (type = 0; type < MAXQUOTAS; type++) { 928 if (!sb_has_quota_loaded(sb, type)) 929 continue; 930 inode = igrab(sb->s_dquot.files[type]); 931 /* Turn off quotas. This will remove all dquot structures from 932 * memory and so they will be automatically synced to global 933 * quota files */ 934 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED | 935 DQUOT_LIMITS_ENABLED); 936 if (!inode) 937 continue; 938 iput(inode); 939 } 940 } 941 942 /* Handle quota on quotactl */ 943 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 944 char *path, int remount) 945 { 946 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 947 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 948 949 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 950 return -EINVAL; 951 952 if (remount) 953 return 0; /* Just ignore it has been handled in 954 * ocfs2_remount() */ 955 return vfs_quota_enable(sb_dqopt(sb)->files[type], type, 956 format_id, DQUOT_LIMITS_ENABLED); 957 } 958 959 /* Handle quota off quotactl */ 960 static int ocfs2_quota_off(struct super_block *sb, int type, int remount) 961 { 962 if (remount) 963 return 0; /* Ignore now and handle later in 964 * ocfs2_remount() */ 965 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED); 966 } 967 968 static const struct quotactl_ops ocfs2_quotactl_ops = { 969 .quota_on = ocfs2_quota_on, 970 .quota_off = ocfs2_quota_off, 971 .quota_sync = vfs_quota_sync, 972 .get_info = vfs_get_dqinfo, 973 .set_info = vfs_set_dqinfo, 974 .get_dqblk = vfs_get_dqblk, 975 .set_dqblk = vfs_set_dqblk, 976 }; 977 978 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 979 { 980 struct dentry *root; 981 int status, sector_size; 982 struct mount_options parsed_options; 983 struct inode *inode = NULL; 984 struct ocfs2_super *osb = NULL; 985 struct buffer_head *bh = NULL; 986 char nodestr[8]; 987 struct ocfs2_blockcheck_stats stats; 988 989 mlog_entry("%p, %p, %i", sb, data, silent); 990 991 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 992 status = -EINVAL; 993 goto read_super_error; 994 } 995 996 /* probe for superblock */ 997 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 998 if (status < 0) { 999 mlog(ML_ERROR, "superblock probe failed!\n"); 1000 goto read_super_error; 1001 } 1002 1003 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1004 osb = OCFS2_SB(sb); 1005 if (status < 0) { 1006 mlog_errno(status); 1007 goto read_super_error; 1008 } 1009 brelse(bh); 1010 bh = NULL; 1011 1012 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)) 1013 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1014 1015 osb->s_mount_opt = parsed_options.mount_opt; 1016 osb->s_atime_quantum = parsed_options.atime_quantum; 1017 osb->preferred_slot = parsed_options.slot; 1018 osb->osb_commit_interval = parsed_options.commit_interval; 1019 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt); 1020 osb->local_alloc_bits = osb->local_alloc_default_bits; 1021 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA && 1022 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1023 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1024 status = -EINVAL; 1025 mlog(ML_ERROR, "User quotas were requested, but this " 1026 "filesystem does not have the feature enabled.\n"); 1027 goto read_super_error; 1028 } 1029 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA && 1030 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1031 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1032 status = -EINVAL; 1033 mlog(ML_ERROR, "Group quotas were requested, but this " 1034 "filesystem does not have the feature enabled.\n"); 1035 goto read_super_error; 1036 } 1037 1038 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1039 if (status) 1040 goto read_super_error; 1041 1042 sb->s_magic = OCFS2_SUPER_MAGIC; 1043 1044 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1045 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1046 1047 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1048 * heartbeat=none */ 1049 if (bdev_read_only(sb->s_bdev)) { 1050 if (!(sb->s_flags & MS_RDONLY)) { 1051 status = -EACCES; 1052 mlog(ML_ERROR, "Readonly device detected but readonly " 1053 "mount was not specified.\n"); 1054 goto read_super_error; 1055 } 1056 1057 /* You should not be able to start a local heartbeat 1058 * on a readonly device. */ 1059 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1060 status = -EROFS; 1061 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1062 "device.\n"); 1063 goto read_super_error; 1064 } 1065 1066 status = ocfs2_check_journals_nolocks(osb); 1067 if (status < 0) { 1068 if (status == -EROFS) 1069 mlog(ML_ERROR, "Recovery required on readonly " 1070 "file system, but write access is " 1071 "unavailable.\n"); 1072 else 1073 mlog_errno(status); 1074 goto read_super_error; 1075 } 1076 1077 ocfs2_set_ro_flag(osb, 1); 1078 1079 printk(KERN_NOTICE "Readonly device detected. No cluster " 1080 "services will be utilized for this mount. Recovery " 1081 "will be skipped.\n"); 1082 } 1083 1084 if (!ocfs2_is_hard_readonly(osb)) { 1085 if (sb->s_flags & MS_RDONLY) 1086 ocfs2_set_ro_flag(osb, 0); 1087 } 1088 1089 status = ocfs2_verify_heartbeat(osb); 1090 if (status < 0) { 1091 mlog_errno(status); 1092 goto read_super_error; 1093 } 1094 1095 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1096 ocfs2_debugfs_root); 1097 if (!osb->osb_debug_root) { 1098 status = -EINVAL; 1099 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1100 goto read_super_error; 1101 } 1102 1103 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1104 osb->osb_debug_root, 1105 osb, 1106 &ocfs2_osb_debug_fops); 1107 if (!osb->osb_ctxt) { 1108 status = -EINVAL; 1109 mlog_errno(status); 1110 goto read_super_error; 1111 } 1112 1113 if (ocfs2_meta_ecc(osb)) { 1114 status = ocfs2_blockcheck_stats_debugfs_install( 1115 &osb->osb_ecc_stats, 1116 osb->osb_debug_root); 1117 if (status) { 1118 mlog(ML_ERROR, 1119 "Unable to create blockcheck statistics " 1120 "files\n"); 1121 goto read_super_error; 1122 } 1123 } 1124 1125 status = ocfs2_mount_volume(sb); 1126 if (osb->root_inode) 1127 inode = igrab(osb->root_inode); 1128 1129 if (status < 0) 1130 goto read_super_error; 1131 1132 if (!inode) { 1133 status = -EIO; 1134 mlog_errno(status); 1135 goto read_super_error; 1136 } 1137 1138 root = d_alloc_root(inode); 1139 if (!root) { 1140 status = -ENOMEM; 1141 mlog_errno(status); 1142 goto read_super_error; 1143 } 1144 1145 sb->s_root = root; 1146 1147 ocfs2_complete_mount_recovery(osb); 1148 1149 if (ocfs2_mount_local(osb)) 1150 snprintf(nodestr, sizeof(nodestr), "local"); 1151 else 1152 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1153 1154 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1155 "with %s data mode.\n", 1156 osb->dev_str, nodestr, osb->slot_num, 1157 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1158 "ordered"); 1159 1160 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1161 wake_up(&osb->osb_mount_event); 1162 1163 /* Now we can initialize quotas because we can afford to wait 1164 * for cluster locks recovery now. That also means that truncation 1165 * log recovery can happen but that waits for proper quota setup */ 1166 if (!(sb->s_flags & MS_RDONLY)) { 1167 status = ocfs2_enable_quotas(osb); 1168 if (status < 0) { 1169 /* We have to err-out specially here because 1170 * s_root is already set */ 1171 mlog_errno(status); 1172 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1173 wake_up(&osb->osb_mount_event); 1174 mlog_exit(status); 1175 return status; 1176 } 1177 } 1178 1179 ocfs2_complete_quota_recovery(osb); 1180 1181 /* Now we wake up again for processes waiting for quotas */ 1182 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1183 wake_up(&osb->osb_mount_event); 1184 1185 /* Start this when the mount is almost sure of being successful */ 1186 ocfs2_orphan_scan_start(osb); 1187 1188 mlog_exit(status); 1189 return status; 1190 1191 read_super_error: 1192 brelse(bh); 1193 1194 if (inode) 1195 iput(inode); 1196 1197 if (osb) { 1198 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1199 wake_up(&osb->osb_mount_event); 1200 ocfs2_dismount_volume(sb, 1); 1201 } 1202 1203 mlog_exit(status); 1204 return status; 1205 } 1206 1207 static int ocfs2_get_sb(struct file_system_type *fs_type, 1208 int flags, 1209 const char *dev_name, 1210 void *data, 1211 struct vfsmount *mnt) 1212 { 1213 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 1214 mnt); 1215 } 1216 1217 static void ocfs2_kill_sb(struct super_block *sb) 1218 { 1219 struct ocfs2_super *osb = OCFS2_SB(sb); 1220 1221 /* Failed mount? */ 1222 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1223 goto out; 1224 1225 /* Prevent further queueing of inode drop events */ 1226 spin_lock(&dentry_list_lock); 1227 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1228 spin_unlock(&dentry_list_lock); 1229 /* Wait for work to finish and/or remove it */ 1230 cancel_work_sync(&osb->dentry_lock_work); 1231 out: 1232 kill_block_super(sb); 1233 } 1234 1235 static struct file_system_type ocfs2_fs_type = { 1236 .owner = THIS_MODULE, 1237 .name = "ocfs2", 1238 .get_sb = ocfs2_get_sb, /* is this called when we mount 1239 * the fs? */ 1240 .kill_sb = ocfs2_kill_sb, 1241 1242 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1243 .next = NULL 1244 }; 1245 1246 static int ocfs2_parse_options(struct super_block *sb, 1247 char *options, 1248 struct mount_options *mopt, 1249 int is_remount) 1250 { 1251 int status; 1252 char *p; 1253 1254 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1255 options ? options : "(none)"); 1256 1257 mopt->commit_interval = 0; 1258 mopt->mount_opt = 0; 1259 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1260 mopt->slot = OCFS2_INVALID_SLOT; 1261 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE; 1262 mopt->cluster_stack[0] = '\0'; 1263 1264 if (!options) { 1265 status = 1; 1266 goto bail; 1267 } 1268 1269 while ((p = strsep(&options, ",")) != NULL) { 1270 int token, option; 1271 substring_t args[MAX_OPT_ARGS]; 1272 1273 if (!*p) 1274 continue; 1275 1276 token = match_token(p, tokens, args); 1277 switch (token) { 1278 case Opt_hb_local: 1279 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1280 break; 1281 case Opt_hb_none: 1282 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 1283 break; 1284 case Opt_barrier: 1285 if (match_int(&args[0], &option)) { 1286 status = 0; 1287 goto bail; 1288 } 1289 if (option) 1290 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1291 else 1292 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1293 break; 1294 case Opt_intr: 1295 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1296 break; 1297 case Opt_nointr: 1298 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1299 break; 1300 case Opt_err_panic: 1301 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1302 break; 1303 case Opt_err_ro: 1304 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1305 break; 1306 case Opt_data_ordered: 1307 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1308 break; 1309 case Opt_data_writeback: 1310 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1311 break; 1312 case Opt_user_xattr: 1313 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1314 break; 1315 case Opt_nouser_xattr: 1316 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1317 break; 1318 case Opt_atime_quantum: 1319 if (match_int(&args[0], &option)) { 1320 status = 0; 1321 goto bail; 1322 } 1323 if (option >= 0) 1324 mopt->atime_quantum = option; 1325 break; 1326 case Opt_slot: 1327 option = 0; 1328 if (match_int(&args[0], &option)) { 1329 status = 0; 1330 goto bail; 1331 } 1332 if (option) 1333 mopt->slot = (s16)option; 1334 break; 1335 case Opt_commit: 1336 option = 0; 1337 if (match_int(&args[0], &option)) { 1338 status = 0; 1339 goto bail; 1340 } 1341 if (option < 0) 1342 return 0; 1343 if (option == 0) 1344 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1345 mopt->commit_interval = HZ * option; 1346 break; 1347 case Opt_localalloc: 1348 option = 0; 1349 if (match_int(&args[0], &option)) { 1350 status = 0; 1351 goto bail; 1352 } 1353 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8)) 1354 mopt->localalloc_opt = option; 1355 break; 1356 case Opt_localflocks: 1357 /* 1358 * Changing this during remount could race 1359 * flock() requests, or "unbalance" existing 1360 * ones (e.g., a lock is taken in one mode but 1361 * dropped in the other). If users care enough 1362 * to flip locking modes during remount, we 1363 * could add a "local" flag to individual 1364 * flock structures for proper tracking of 1365 * state. 1366 */ 1367 if (!is_remount) 1368 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1369 break; 1370 case Opt_stack: 1371 /* Check both that the option we were passed 1372 * is of the right length and that it is a proper 1373 * string of the right length. 1374 */ 1375 if (((args[0].to - args[0].from) != 1376 OCFS2_STACK_LABEL_LEN) || 1377 (strnlen(args[0].from, 1378 OCFS2_STACK_LABEL_LEN) != 1379 OCFS2_STACK_LABEL_LEN)) { 1380 mlog(ML_ERROR, 1381 "Invalid cluster_stack option\n"); 1382 status = 0; 1383 goto bail; 1384 } 1385 memcpy(mopt->cluster_stack, args[0].from, 1386 OCFS2_STACK_LABEL_LEN); 1387 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1388 break; 1389 case Opt_inode64: 1390 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1391 break; 1392 case Opt_usrquota: 1393 /* We check only on remount, otherwise features 1394 * aren't yet initialized. */ 1395 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1396 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1397 mlog(ML_ERROR, "User quota requested but " 1398 "filesystem feature is not set\n"); 1399 status = 0; 1400 goto bail; 1401 } 1402 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1403 break; 1404 case Opt_grpquota: 1405 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1406 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1407 mlog(ML_ERROR, "Group quota requested but " 1408 "filesystem feature is not set\n"); 1409 status = 0; 1410 goto bail; 1411 } 1412 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1413 break; 1414 #ifdef CONFIG_OCFS2_FS_POSIX_ACL 1415 case Opt_acl: 1416 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1417 break; 1418 case Opt_noacl: 1419 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1420 break; 1421 #else 1422 case Opt_acl: 1423 case Opt_noacl: 1424 printk(KERN_INFO "ocfs2 (no)acl options not supported\n"); 1425 break; 1426 #endif 1427 default: 1428 mlog(ML_ERROR, 1429 "Unrecognized mount option \"%s\" " 1430 "or missing value\n", p); 1431 status = 0; 1432 goto bail; 1433 } 1434 } 1435 1436 status = 1; 1437 1438 bail: 1439 mlog_exit(status); 1440 return status; 1441 } 1442 1443 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1444 { 1445 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1446 unsigned long opts = osb->s_mount_opt; 1447 unsigned int local_alloc_megs; 1448 1449 if (opts & OCFS2_MOUNT_HB_LOCAL) 1450 seq_printf(s, ",_netdev,heartbeat=local"); 1451 else 1452 seq_printf(s, ",heartbeat=none"); 1453 1454 if (opts & OCFS2_MOUNT_NOINTR) 1455 seq_printf(s, ",nointr"); 1456 1457 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1458 seq_printf(s, ",data=writeback"); 1459 else 1460 seq_printf(s, ",data=ordered"); 1461 1462 if (opts & OCFS2_MOUNT_BARRIER) 1463 seq_printf(s, ",barrier=1"); 1464 1465 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1466 seq_printf(s, ",errors=panic"); 1467 else 1468 seq_printf(s, ",errors=remount-ro"); 1469 1470 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1471 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1472 1473 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1474 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1475 1476 if (osb->osb_commit_interval) 1477 seq_printf(s, ",commit=%u", 1478 (unsigned) (osb->osb_commit_interval / HZ)); 1479 1480 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1481 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE) 1482 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1483 1484 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1485 seq_printf(s, ",localflocks,"); 1486 1487 if (osb->osb_cluster_stack[0]) 1488 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1489 osb->osb_cluster_stack); 1490 if (opts & OCFS2_MOUNT_USRQUOTA) 1491 seq_printf(s, ",usrquota"); 1492 if (opts & OCFS2_MOUNT_GRPQUOTA) 1493 seq_printf(s, ",grpquota"); 1494 1495 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1496 seq_printf(s, ",nouser_xattr"); 1497 else 1498 seq_printf(s, ",user_xattr"); 1499 1500 if (opts & OCFS2_MOUNT_INODE64) 1501 seq_printf(s, ",inode64"); 1502 1503 #ifdef CONFIG_OCFS2_FS_POSIX_ACL 1504 if (opts & OCFS2_MOUNT_POSIX_ACL) 1505 seq_printf(s, ",acl"); 1506 else 1507 seq_printf(s, ",noacl"); 1508 #endif 1509 1510 return 0; 1511 } 1512 1513 static int __init ocfs2_init(void) 1514 { 1515 int status; 1516 1517 mlog_entry_void(); 1518 1519 ocfs2_print_version(); 1520 1521 status = init_ocfs2_uptodate_cache(); 1522 if (status < 0) { 1523 mlog_errno(status); 1524 goto leave; 1525 } 1526 1527 status = ocfs2_initialize_mem_caches(); 1528 if (status < 0) { 1529 mlog_errno(status); 1530 goto leave; 1531 } 1532 1533 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1534 if (!ocfs2_wq) { 1535 status = -ENOMEM; 1536 goto leave; 1537 } 1538 1539 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1540 if (!ocfs2_debugfs_root) { 1541 status = -EFAULT; 1542 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1543 } 1544 1545 status = ocfs2_quota_setup(); 1546 if (status) 1547 goto leave; 1548 1549 ocfs2_set_locking_protocol(); 1550 1551 status = register_quota_format(&ocfs2_quota_format); 1552 leave: 1553 if (status < 0) { 1554 ocfs2_quota_shutdown(); 1555 ocfs2_free_mem_caches(); 1556 exit_ocfs2_uptodate_cache(); 1557 } 1558 1559 mlog_exit(status); 1560 1561 if (status >= 0) { 1562 return register_filesystem(&ocfs2_fs_type); 1563 } else 1564 return -1; 1565 } 1566 1567 static void __exit ocfs2_exit(void) 1568 { 1569 mlog_entry_void(); 1570 1571 ocfs2_quota_shutdown(); 1572 1573 if (ocfs2_wq) { 1574 flush_workqueue(ocfs2_wq); 1575 destroy_workqueue(ocfs2_wq); 1576 } 1577 1578 unregister_quota_format(&ocfs2_quota_format); 1579 1580 debugfs_remove(ocfs2_debugfs_root); 1581 1582 ocfs2_free_mem_caches(); 1583 1584 unregister_filesystem(&ocfs2_fs_type); 1585 1586 exit_ocfs2_uptodate_cache(); 1587 1588 mlog_exit_void(); 1589 } 1590 1591 static void ocfs2_put_super(struct super_block *sb) 1592 { 1593 mlog_entry("(0x%p)\n", sb); 1594 1595 lock_kernel(); 1596 1597 ocfs2_sync_blockdev(sb); 1598 ocfs2_dismount_volume(sb, 0); 1599 1600 unlock_kernel(); 1601 1602 mlog_exit_void(); 1603 } 1604 1605 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1606 { 1607 struct ocfs2_super *osb; 1608 u32 numbits, freebits; 1609 int status; 1610 struct ocfs2_dinode *bm_lock; 1611 struct buffer_head *bh = NULL; 1612 struct inode *inode = NULL; 1613 1614 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1615 1616 osb = OCFS2_SB(dentry->d_sb); 1617 1618 inode = ocfs2_get_system_file_inode(osb, 1619 GLOBAL_BITMAP_SYSTEM_INODE, 1620 OCFS2_INVALID_SLOT); 1621 if (!inode) { 1622 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1623 status = -EIO; 1624 goto bail; 1625 } 1626 1627 status = ocfs2_inode_lock(inode, &bh, 0); 1628 if (status < 0) { 1629 mlog_errno(status); 1630 goto bail; 1631 } 1632 1633 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1634 1635 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1636 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1637 1638 buf->f_type = OCFS2_SUPER_MAGIC; 1639 buf->f_bsize = dentry->d_sb->s_blocksize; 1640 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1641 buf->f_blocks = ((sector_t) numbits) * 1642 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1643 buf->f_bfree = ((sector_t) freebits) * 1644 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1645 buf->f_bavail = buf->f_bfree; 1646 buf->f_files = numbits; 1647 buf->f_ffree = freebits; 1648 1649 brelse(bh); 1650 1651 ocfs2_inode_unlock(inode, 0); 1652 status = 0; 1653 bail: 1654 if (inode) 1655 iput(inode); 1656 1657 mlog_exit(status); 1658 1659 return status; 1660 } 1661 1662 static void ocfs2_inode_init_once(void *data) 1663 { 1664 struct ocfs2_inode_info *oi = data; 1665 1666 oi->ip_flags = 0; 1667 oi->ip_open_count = 0; 1668 spin_lock_init(&oi->ip_lock); 1669 ocfs2_extent_map_init(&oi->vfs_inode); 1670 INIT_LIST_HEAD(&oi->ip_io_markers); 1671 oi->ip_dir_start_lookup = 0; 1672 1673 init_rwsem(&oi->ip_alloc_sem); 1674 init_rwsem(&oi->ip_xattr_sem); 1675 mutex_init(&oi->ip_io_mutex); 1676 1677 oi->ip_blkno = 0ULL; 1678 oi->ip_clusters = 0; 1679 1680 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1681 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1682 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1683 1684 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1685 &ocfs2_inode_caching_ops); 1686 1687 inode_init_once(&oi->vfs_inode); 1688 } 1689 1690 static int ocfs2_initialize_mem_caches(void) 1691 { 1692 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1693 sizeof(struct ocfs2_inode_info), 1694 0, 1695 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1696 SLAB_MEM_SPREAD), 1697 ocfs2_inode_init_once); 1698 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1699 sizeof(struct ocfs2_dquot), 1700 0, 1701 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1702 SLAB_MEM_SPREAD), 1703 NULL); 1704 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1705 sizeof(struct ocfs2_quota_chunk), 1706 0, 1707 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1708 NULL); 1709 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1710 !ocfs2_qf_chunk_cachep) { 1711 if (ocfs2_inode_cachep) 1712 kmem_cache_destroy(ocfs2_inode_cachep); 1713 if (ocfs2_dquot_cachep) 1714 kmem_cache_destroy(ocfs2_dquot_cachep); 1715 if (ocfs2_qf_chunk_cachep) 1716 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1717 return -ENOMEM; 1718 } 1719 1720 return 0; 1721 } 1722 1723 static void ocfs2_free_mem_caches(void) 1724 { 1725 if (ocfs2_inode_cachep) 1726 kmem_cache_destroy(ocfs2_inode_cachep); 1727 ocfs2_inode_cachep = NULL; 1728 1729 if (ocfs2_dquot_cachep) 1730 kmem_cache_destroy(ocfs2_dquot_cachep); 1731 ocfs2_dquot_cachep = NULL; 1732 1733 if (ocfs2_qf_chunk_cachep) 1734 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1735 ocfs2_qf_chunk_cachep = NULL; 1736 } 1737 1738 static int ocfs2_get_sector(struct super_block *sb, 1739 struct buffer_head **bh, 1740 int block, 1741 int sect_size) 1742 { 1743 if (!sb_set_blocksize(sb, sect_size)) { 1744 mlog(ML_ERROR, "unable to set blocksize\n"); 1745 return -EIO; 1746 } 1747 1748 *bh = sb_getblk(sb, block); 1749 if (!*bh) { 1750 mlog_errno(-EIO); 1751 return -EIO; 1752 } 1753 lock_buffer(*bh); 1754 if (!buffer_dirty(*bh)) 1755 clear_buffer_uptodate(*bh); 1756 unlock_buffer(*bh); 1757 ll_rw_block(READ, 1, bh); 1758 wait_on_buffer(*bh); 1759 if (!buffer_uptodate(*bh)) { 1760 mlog_errno(-EIO); 1761 brelse(*bh); 1762 *bh = NULL; 1763 return -EIO; 1764 } 1765 1766 return 0; 1767 } 1768 1769 static int ocfs2_mount_volume(struct super_block *sb) 1770 { 1771 int status = 0; 1772 int unlock_super = 0; 1773 struct ocfs2_super *osb = OCFS2_SB(sb); 1774 1775 mlog_entry_void(); 1776 1777 if (ocfs2_is_hard_readonly(osb)) 1778 goto leave; 1779 1780 status = ocfs2_dlm_init(osb); 1781 if (status < 0) { 1782 mlog_errno(status); 1783 goto leave; 1784 } 1785 1786 status = ocfs2_super_lock(osb, 1); 1787 if (status < 0) { 1788 mlog_errno(status); 1789 goto leave; 1790 } 1791 unlock_super = 1; 1792 1793 /* This will load up the node map and add ourselves to it. */ 1794 status = ocfs2_find_slot(osb); 1795 if (status < 0) { 1796 mlog_errno(status); 1797 goto leave; 1798 } 1799 1800 /* load all node-local system inodes */ 1801 status = ocfs2_init_local_system_inodes(osb); 1802 if (status < 0) { 1803 mlog_errno(status); 1804 goto leave; 1805 } 1806 1807 status = ocfs2_check_volume(osb); 1808 if (status < 0) { 1809 mlog_errno(status); 1810 goto leave; 1811 } 1812 1813 status = ocfs2_truncate_log_init(osb); 1814 if (status < 0) 1815 mlog_errno(status); 1816 1817 leave: 1818 if (unlock_super) 1819 ocfs2_super_unlock(osb, 1); 1820 1821 mlog_exit(status); 1822 return status; 1823 } 1824 1825 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1826 { 1827 int tmp, hangup_needed = 0; 1828 struct ocfs2_super *osb = NULL; 1829 char nodestr[8]; 1830 1831 mlog_entry("(0x%p)\n", sb); 1832 1833 BUG_ON(!sb); 1834 osb = OCFS2_SB(sb); 1835 BUG_ON(!osb); 1836 1837 debugfs_remove(osb->osb_ctxt); 1838 1839 /* 1840 * Flush inode dropping work queue so that deletes are 1841 * performed while the filesystem is still working 1842 */ 1843 ocfs2_drop_all_dl_inodes(osb); 1844 1845 /* Orphan scan should be stopped as early as possible */ 1846 ocfs2_orphan_scan_stop(osb); 1847 1848 ocfs2_disable_quotas(osb); 1849 1850 ocfs2_shutdown_local_alloc(osb); 1851 1852 ocfs2_truncate_log_shutdown(osb); 1853 1854 /* This will disable recovery and flush any recovery work. */ 1855 ocfs2_recovery_exit(osb); 1856 1857 ocfs2_journal_shutdown(osb); 1858 1859 ocfs2_sync_blockdev(sb); 1860 1861 ocfs2_purge_refcount_trees(osb); 1862 1863 /* No cluster connection means we've failed during mount, so skip 1864 * all the steps which depended on that to complete. */ 1865 if (osb->cconn) { 1866 tmp = ocfs2_super_lock(osb, 1); 1867 if (tmp < 0) { 1868 mlog_errno(tmp); 1869 return; 1870 } 1871 } 1872 1873 if (osb->slot_num != OCFS2_INVALID_SLOT) 1874 ocfs2_put_slot(osb); 1875 1876 if (osb->cconn) 1877 ocfs2_super_unlock(osb, 1); 1878 1879 ocfs2_release_system_inodes(osb); 1880 1881 /* 1882 * If we're dismounting due to mount error, mount.ocfs2 will clean 1883 * up heartbeat. If we're a local mount, there is no heartbeat. 1884 * If we failed before we got a uuid_str yet, we can't stop 1885 * heartbeat. Otherwise, do it. 1886 */ 1887 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1888 hangup_needed = 1; 1889 1890 if (osb->cconn) 1891 ocfs2_dlm_shutdown(osb, hangup_needed); 1892 1893 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1894 debugfs_remove(osb->osb_debug_root); 1895 1896 if (hangup_needed) 1897 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1898 1899 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1900 1901 if (ocfs2_mount_local(osb)) 1902 snprintf(nodestr, sizeof(nodestr), "local"); 1903 else 1904 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1905 1906 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1907 osb->dev_str, nodestr); 1908 1909 ocfs2_delete_osb(osb); 1910 kfree(osb); 1911 sb->s_dev = 0; 1912 sb->s_fs_info = NULL; 1913 } 1914 1915 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1916 unsigned uuid_bytes) 1917 { 1918 int i, ret; 1919 char *ptr; 1920 1921 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1922 1923 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1924 if (osb->uuid_str == NULL) 1925 return -ENOMEM; 1926 1927 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1928 /* print with null */ 1929 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1930 if (ret != 2) /* drop super cleans up */ 1931 return -EINVAL; 1932 /* then only advance past the last char */ 1933 ptr += 2; 1934 } 1935 1936 return 0; 1937 } 1938 1939 static int ocfs2_initialize_super(struct super_block *sb, 1940 struct buffer_head *bh, 1941 int sector_size, 1942 struct ocfs2_blockcheck_stats *stats) 1943 { 1944 int status; 1945 int i, cbits, bbits; 1946 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1947 struct inode *inode = NULL; 1948 struct ocfs2_journal *journal; 1949 __le32 uuid_net_key; 1950 struct ocfs2_super *osb; 1951 1952 mlog_entry_void(); 1953 1954 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 1955 if (!osb) { 1956 status = -ENOMEM; 1957 mlog_errno(status); 1958 goto bail; 1959 } 1960 1961 sb->s_fs_info = osb; 1962 sb->s_op = &ocfs2_sops; 1963 sb->s_export_op = &ocfs2_export_ops; 1964 sb->s_qcop = &ocfs2_quotactl_ops; 1965 sb->dq_op = &ocfs2_quota_operations; 1966 sb->s_xattr = ocfs2_xattr_handlers; 1967 sb->s_time_gran = 1; 1968 sb->s_flags |= MS_NOATIME; 1969 /* this is needed to support O_LARGEFILE */ 1970 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1971 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 1972 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 1973 1974 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 1975 1976 for (i = 0; i < 3; i++) 1977 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 1978 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 1979 1980 osb->sb = sb; 1981 /* Save off for ocfs2_rw_direct */ 1982 osb->s_sectsize_bits = blksize_bits(sector_size); 1983 BUG_ON(!osb->s_sectsize_bits); 1984 1985 spin_lock_init(&osb->dc_task_lock); 1986 init_waitqueue_head(&osb->dc_event); 1987 osb->dc_work_sequence = 0; 1988 osb->dc_wake_sequence = 0; 1989 INIT_LIST_HEAD(&osb->blocked_lock_list); 1990 osb->blocked_lock_count = 0; 1991 spin_lock_init(&osb->osb_lock); 1992 spin_lock_init(&osb->osb_xattr_lock); 1993 ocfs2_init_inode_steal_slot(osb); 1994 1995 atomic_set(&osb->alloc_stats.moves, 0); 1996 atomic_set(&osb->alloc_stats.local_data, 0); 1997 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1998 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1999 atomic_set(&osb->alloc_stats.bg_extends, 0); 2000 2001 /* Copy the blockcheck stats from the superblock probe */ 2002 osb->osb_ecc_stats = *stats; 2003 2004 ocfs2_init_node_maps(osb); 2005 2006 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2007 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2008 2009 ocfs2_orphan_scan_init(osb); 2010 2011 status = ocfs2_recovery_init(osb); 2012 if (status) { 2013 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2014 mlog_errno(status); 2015 goto bail; 2016 } 2017 2018 init_waitqueue_head(&osb->checkpoint_event); 2019 atomic_set(&osb->needs_checkpoint, 0); 2020 2021 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2022 2023 osb->slot_num = OCFS2_INVALID_SLOT; 2024 2025 osb->s_xattr_inline_size = le16_to_cpu( 2026 di->id2.i_super.s_xattr_inline_size); 2027 2028 osb->local_alloc_state = OCFS2_LA_UNUSED; 2029 osb->local_alloc_bh = NULL; 2030 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2031 2032 init_waitqueue_head(&osb->osb_mount_event); 2033 2034 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2035 if (!osb->vol_label) { 2036 mlog(ML_ERROR, "unable to alloc vol label\n"); 2037 status = -ENOMEM; 2038 goto bail; 2039 } 2040 2041 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2042 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2043 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2044 osb->max_slots); 2045 status = -EINVAL; 2046 goto bail; 2047 } 2048 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 2049 2050 osb->slot_recovery_generations = 2051 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2052 GFP_KERNEL); 2053 if (!osb->slot_recovery_generations) { 2054 status = -ENOMEM; 2055 mlog_errno(status); 2056 goto bail; 2057 } 2058 2059 init_waitqueue_head(&osb->osb_wipe_event); 2060 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2061 sizeof(*osb->osb_orphan_wipes), 2062 GFP_KERNEL); 2063 if (!osb->osb_orphan_wipes) { 2064 status = -ENOMEM; 2065 mlog_errno(status); 2066 goto bail; 2067 } 2068 2069 osb->osb_rf_lock_tree = RB_ROOT; 2070 2071 osb->s_feature_compat = 2072 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2073 osb->s_feature_ro_compat = 2074 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2075 osb->s_feature_incompat = 2076 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2077 2078 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2079 mlog(ML_ERROR, "couldn't mount because of unsupported " 2080 "optional features (%x).\n", i); 2081 status = -EINVAL; 2082 goto bail; 2083 } 2084 if (!(osb->sb->s_flags & MS_RDONLY) && 2085 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2086 mlog(ML_ERROR, "couldn't mount RDWR because of " 2087 "unsupported optional features (%x).\n", i); 2088 status = -EINVAL; 2089 goto bail; 2090 } 2091 2092 if (ocfs2_userspace_stack(osb)) { 2093 memcpy(osb->osb_cluster_stack, 2094 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2095 OCFS2_STACK_LABEL_LEN); 2096 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2097 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2098 mlog(ML_ERROR, 2099 "couldn't mount because of an invalid " 2100 "cluster stack label (%s) \n", 2101 osb->osb_cluster_stack); 2102 status = -EINVAL; 2103 goto bail; 2104 } 2105 } else { 2106 /* The empty string is identical with classic tools that 2107 * don't know about s_cluster_info. */ 2108 osb->osb_cluster_stack[0] = '\0'; 2109 } 2110 2111 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2112 2113 /* FIXME 2114 * This should be done in ocfs2_journal_init(), but unknown 2115 * ordering issues will cause the filesystem to crash. 2116 * If anyone wants to figure out what part of the code 2117 * refers to osb->journal before ocfs2_journal_init() is run, 2118 * be my guest. 2119 */ 2120 /* initialize our journal structure */ 2121 2122 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2123 if (!journal) { 2124 mlog(ML_ERROR, "unable to alloc journal\n"); 2125 status = -ENOMEM; 2126 goto bail; 2127 } 2128 osb->journal = journal; 2129 journal->j_osb = osb; 2130 2131 atomic_set(&journal->j_num_trans, 0); 2132 init_rwsem(&journal->j_trans_barrier); 2133 init_waitqueue_head(&journal->j_checkpointed); 2134 spin_lock_init(&journal->j_lock); 2135 journal->j_trans_id = (unsigned long) 1; 2136 INIT_LIST_HEAD(&journal->j_la_cleanups); 2137 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2138 journal->j_state = OCFS2_JOURNAL_FREE; 2139 2140 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2141 osb->dentry_lock_list = NULL; 2142 2143 /* get some pseudo constants for clustersize bits */ 2144 osb->s_clustersize_bits = 2145 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2146 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2147 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 2148 2149 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2150 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2151 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2152 osb->s_clustersize); 2153 status = -EINVAL; 2154 goto bail; 2155 } 2156 2157 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 2158 > (u32)~0UL) { 2159 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 2160 "what jbd can address in 32 bits.\n"); 2161 status = -EINVAL; 2162 goto bail; 2163 } 2164 2165 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2166 sizeof(di->id2.i_super.s_uuid))) { 2167 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2168 status = -ENOMEM; 2169 goto bail; 2170 } 2171 2172 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2173 2174 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2175 osb->vol_label[63] = '\0'; 2176 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2177 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2178 osb->first_cluster_group_blkno = 2179 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2180 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2181 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2182 mlog(0, "vol_label: %s\n", osb->vol_label); 2183 mlog(0, "uuid: %s\n", osb->uuid_str); 2184 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 2185 (unsigned long long)osb->root_blkno, 2186 (unsigned long long)osb->system_dir_blkno); 2187 2188 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2189 if (!osb->osb_dlm_debug) { 2190 status = -ENOMEM; 2191 mlog_errno(status); 2192 goto bail; 2193 } 2194 2195 atomic_set(&osb->vol_state, VOLUME_INIT); 2196 2197 /* load root, system_dir, and all global system inodes */ 2198 status = ocfs2_init_global_system_inodes(osb); 2199 if (status < 0) { 2200 mlog_errno(status); 2201 goto bail; 2202 } 2203 2204 /* 2205 * global bitmap 2206 */ 2207 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2208 OCFS2_INVALID_SLOT); 2209 if (!inode) { 2210 status = -EINVAL; 2211 mlog_errno(status); 2212 goto bail; 2213 } 2214 2215 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2216 iput(inode); 2217 2218 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8; 2219 2220 status = ocfs2_init_slot_info(osb); 2221 if (status < 0) { 2222 mlog_errno(status); 2223 goto bail; 2224 } 2225 2226 bail: 2227 mlog_exit(status); 2228 return status; 2229 } 2230 2231 /* 2232 * will return: -EAGAIN if it is ok to keep searching for superblocks 2233 * -EINVAL if there is a bad superblock 2234 * 0 on success 2235 */ 2236 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2237 struct buffer_head *bh, 2238 u32 blksz, 2239 struct ocfs2_blockcheck_stats *stats) 2240 { 2241 int status = -EAGAIN; 2242 2243 mlog_entry_void(); 2244 2245 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2246 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2247 /* We have to do a raw check of the feature here */ 2248 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2249 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2250 status = ocfs2_block_check_validate(bh->b_data, 2251 bh->b_size, 2252 &di->i_check, 2253 stats); 2254 if (status) 2255 goto out; 2256 } 2257 status = -EINVAL; 2258 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2259 mlog(ML_ERROR, "found superblock with incorrect block " 2260 "size: found %u, should be %u\n", 2261 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2262 blksz); 2263 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2264 OCFS2_MAJOR_REV_LEVEL || 2265 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2266 OCFS2_MINOR_REV_LEVEL) { 2267 mlog(ML_ERROR, "found superblock with bad version: " 2268 "found %u.%u, should be %u.%u\n", 2269 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2270 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2271 OCFS2_MAJOR_REV_LEVEL, 2272 OCFS2_MINOR_REV_LEVEL); 2273 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2274 mlog(ML_ERROR, "bad block number on superblock: " 2275 "found %llu, should be %llu\n", 2276 (unsigned long long)le64_to_cpu(di->i_blkno), 2277 (unsigned long long)bh->b_blocknr); 2278 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2279 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2280 mlog(ML_ERROR, "bad cluster size found: %u\n", 2281 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2282 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2283 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2284 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2285 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2286 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2287 mlog(ML_ERROR, 2288 "Superblock slots found greater than file system " 2289 "maximum: found %u, max %u\n", 2290 le16_to_cpu(di->id2.i_super.s_max_slots), 2291 OCFS2_MAX_SLOTS); 2292 } else { 2293 /* found it! */ 2294 status = 0; 2295 } 2296 } 2297 2298 out: 2299 mlog_exit(status); 2300 return status; 2301 } 2302 2303 static int ocfs2_check_volume(struct ocfs2_super *osb) 2304 { 2305 int status; 2306 int dirty; 2307 int local; 2308 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2309 * recover 2310 * ourselves. */ 2311 2312 mlog_entry_void(); 2313 2314 /* Init our journal object. */ 2315 status = ocfs2_journal_init(osb->journal, &dirty); 2316 if (status < 0) { 2317 mlog(ML_ERROR, "Could not initialize journal!\n"); 2318 goto finally; 2319 } 2320 2321 /* If the journal was unmounted cleanly then we don't want to 2322 * recover anything. Otherwise, journal_load will do that 2323 * dirty work for us :) */ 2324 if (!dirty) { 2325 status = ocfs2_journal_wipe(osb->journal, 0); 2326 if (status < 0) { 2327 mlog_errno(status); 2328 goto finally; 2329 } 2330 } else { 2331 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2332 "recovering volume.\n"); 2333 } 2334 2335 local = ocfs2_mount_local(osb); 2336 2337 /* will play back anything left in the journal. */ 2338 status = ocfs2_journal_load(osb->journal, local, dirty); 2339 if (status < 0) { 2340 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2341 goto finally; 2342 } 2343 2344 if (dirty) { 2345 /* recover my local alloc if we didn't unmount cleanly. */ 2346 status = ocfs2_begin_local_alloc_recovery(osb, 2347 osb->slot_num, 2348 &local_alloc); 2349 if (status < 0) { 2350 mlog_errno(status); 2351 goto finally; 2352 } 2353 /* we complete the recovery process after we've marked 2354 * ourselves as mounted. */ 2355 } 2356 2357 mlog(0, "Journal loaded.\n"); 2358 2359 status = ocfs2_load_local_alloc(osb); 2360 if (status < 0) { 2361 mlog_errno(status); 2362 goto finally; 2363 } 2364 2365 if (dirty) { 2366 /* Recovery will be completed after we've mounted the 2367 * rest of the volume. */ 2368 osb->dirty = 1; 2369 osb->local_alloc_copy = local_alloc; 2370 local_alloc = NULL; 2371 } 2372 2373 /* go through each journal, trylock it and if you get the 2374 * lock, and it's marked as dirty, set the bit in the recover 2375 * map and launch a recovery thread for it. */ 2376 status = ocfs2_mark_dead_nodes(osb); 2377 if (status < 0) { 2378 mlog_errno(status); 2379 goto finally; 2380 } 2381 2382 status = ocfs2_compute_replay_slots(osb); 2383 if (status < 0) 2384 mlog_errno(status); 2385 2386 finally: 2387 if (local_alloc) 2388 kfree(local_alloc); 2389 2390 mlog_exit(status); 2391 return status; 2392 } 2393 2394 /* 2395 * The routine gets called from dismount or close whenever a dismount on 2396 * volume is requested and the osb open count becomes 1. 2397 * It will remove the osb from the global list and also free up all the 2398 * initialized resources and fileobject. 2399 */ 2400 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2401 { 2402 mlog_entry_void(); 2403 2404 /* This function assumes that the caller has the main osb resource */ 2405 2406 ocfs2_free_slot_info(osb); 2407 2408 kfree(osb->osb_orphan_wipes); 2409 kfree(osb->slot_recovery_generations); 2410 /* FIXME 2411 * This belongs in journal shutdown, but because we have to 2412 * allocate osb->journal at the start of ocfs2_initalize_osb(), 2413 * we free it here. 2414 */ 2415 kfree(osb->journal); 2416 if (osb->local_alloc_copy) 2417 kfree(osb->local_alloc_copy); 2418 kfree(osb->uuid_str); 2419 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2420 memset(osb, 0, sizeof(struct ocfs2_super)); 2421 2422 mlog_exit_void(); 2423 } 2424 2425 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2426 * panic(). We do not support continue-on-error operation. */ 2427 static void ocfs2_handle_error(struct super_block *sb) 2428 { 2429 struct ocfs2_super *osb = OCFS2_SB(sb); 2430 2431 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2432 panic("OCFS2: (device %s): panic forced after error\n", 2433 sb->s_id); 2434 2435 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2436 2437 if (sb->s_flags & MS_RDONLY && 2438 (ocfs2_is_soft_readonly(osb) || 2439 ocfs2_is_hard_readonly(osb))) 2440 return; 2441 2442 printk(KERN_CRIT "File system is now read-only due to the potential " 2443 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2444 "system is unmounted.\n"); 2445 sb->s_flags |= MS_RDONLY; 2446 ocfs2_set_ro_flag(osb, 0); 2447 } 2448 2449 static char error_buf[1024]; 2450 2451 void __ocfs2_error(struct super_block *sb, 2452 const char *function, 2453 const char *fmt, ...) 2454 { 2455 va_list args; 2456 2457 va_start(args, fmt); 2458 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2459 va_end(args); 2460 2461 /* Not using mlog here because we want to show the actual 2462 * function the error came from. */ 2463 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2464 sb->s_id, function, error_buf); 2465 2466 ocfs2_handle_error(sb); 2467 } 2468 2469 /* Handle critical errors. This is intentionally more drastic than 2470 * ocfs2_handle_error, so we only use for things like journal errors, 2471 * etc. */ 2472 void __ocfs2_abort(struct super_block* sb, 2473 const char *function, 2474 const char *fmt, ...) 2475 { 2476 va_list args; 2477 2478 va_start(args, fmt); 2479 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2480 va_end(args); 2481 2482 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2483 sb->s_id, function, error_buf); 2484 2485 /* We don't have the cluster support yet to go straight to 2486 * hard readonly in here. Until then, we want to keep 2487 * ocfs2_abort() so that we can at least mark critical 2488 * errors. 2489 * 2490 * TODO: This should abort the journal and alert other nodes 2491 * that our slot needs recovery. */ 2492 2493 /* Force a panic(). This stinks, but it's better than letting 2494 * things continue without having a proper hard readonly 2495 * here. */ 2496 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2497 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2498 ocfs2_handle_error(sb); 2499 } 2500 2501 module_init(ocfs2_init); 2502 module_exit(ocfs2_exit); 2503