1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/init.h> 32 #include <linux/random.h> 33 #include <linux/statfs.h> 34 #include <linux/moduleparam.h> 35 #include <linux/blkdev.h> 36 #include <linux/socket.h> 37 #include <linux/inet.h> 38 #include <linux/parser.h> 39 #include <linux/crc32.h> 40 #include <linux/debugfs.h> 41 #include <linux/mount.h> 42 #include <linux/seq_file.h> 43 #include <linux/quotaops.h> 44 #include <linux/smp_lock.h> 45 46 #define MLOG_MASK_PREFIX ML_SUPER 47 #include <cluster/masklog.h> 48 49 #include "ocfs2.h" 50 51 /* this should be the only file to include a version 1 header */ 52 #include "ocfs1_fs_compat.h" 53 54 #include "alloc.h" 55 #include "blockcheck.h" 56 #include "dlmglue.h" 57 #include "export.h" 58 #include "extent_map.h" 59 #include "heartbeat.h" 60 #include "inode.h" 61 #include "journal.h" 62 #include "localalloc.h" 63 #include "namei.h" 64 #include "slot_map.h" 65 #include "super.h" 66 #include "sysfile.h" 67 #include "uptodate.h" 68 #include "ver.h" 69 #include "xattr.h" 70 #include "quota.h" 71 #include "refcounttree.h" 72 #include "suballoc.h" 73 74 #include "buffer_head_io.h" 75 76 static struct kmem_cache *ocfs2_inode_cachep = NULL; 77 struct kmem_cache *ocfs2_dquot_cachep; 78 struct kmem_cache *ocfs2_qf_chunk_cachep; 79 80 /* OCFS2 needs to schedule several differnt types of work which 81 * require cluster locking, disk I/O, recovery waits, etc. Since these 82 * types of work tend to be heavy we avoid using the kernel events 83 * workqueue and schedule on our own. */ 84 struct workqueue_struct *ocfs2_wq = NULL; 85 86 static struct dentry *ocfs2_debugfs_root = NULL; 87 88 MODULE_AUTHOR("Oracle"); 89 MODULE_LICENSE("GPL"); 90 91 struct mount_options 92 { 93 unsigned long commit_interval; 94 unsigned long mount_opt; 95 unsigned int atime_quantum; 96 signed short slot; 97 int localalloc_opt; 98 unsigned int resv_level; 99 int dir_resv_level; 100 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 101 }; 102 103 static int ocfs2_parse_options(struct super_block *sb, char *options, 104 struct mount_options *mopt, 105 int is_remount); 106 static int ocfs2_check_set_options(struct super_block *sb, 107 struct mount_options *options); 108 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 109 static void ocfs2_put_super(struct super_block *sb); 110 static int ocfs2_mount_volume(struct super_block *sb); 111 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 112 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 113 static int ocfs2_initialize_mem_caches(void); 114 static void ocfs2_free_mem_caches(void); 115 static void ocfs2_delete_osb(struct ocfs2_super *osb); 116 117 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 118 119 static int ocfs2_sync_fs(struct super_block *sb, int wait); 120 121 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 122 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 123 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 124 static int ocfs2_check_volume(struct ocfs2_super *osb); 125 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 126 struct buffer_head *bh, 127 u32 sectsize, 128 struct ocfs2_blockcheck_stats *stats); 129 static int ocfs2_initialize_super(struct super_block *sb, 130 struct buffer_head *bh, 131 int sector_size, 132 struct ocfs2_blockcheck_stats *stats); 133 static int ocfs2_get_sector(struct super_block *sb, 134 struct buffer_head **bh, 135 int block, 136 int sect_size); 137 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 138 static void ocfs2_destroy_inode(struct inode *inode); 139 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 140 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 141 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 142 143 static const struct super_operations ocfs2_sops = { 144 .statfs = ocfs2_statfs, 145 .alloc_inode = ocfs2_alloc_inode, 146 .destroy_inode = ocfs2_destroy_inode, 147 .drop_inode = ocfs2_drop_inode, 148 .evict_inode = ocfs2_evict_inode, 149 .sync_fs = ocfs2_sync_fs, 150 .put_super = ocfs2_put_super, 151 .remount_fs = ocfs2_remount, 152 .show_options = ocfs2_show_options, 153 .quota_read = ocfs2_quota_read, 154 .quota_write = ocfs2_quota_write, 155 }; 156 157 enum { 158 Opt_barrier, 159 Opt_err_panic, 160 Opt_err_ro, 161 Opt_intr, 162 Opt_nointr, 163 Opt_hb_none, 164 Opt_hb_local, 165 Opt_data_ordered, 166 Opt_data_writeback, 167 Opt_atime_quantum, 168 Opt_slot, 169 Opt_commit, 170 Opt_localalloc, 171 Opt_localflocks, 172 Opt_stack, 173 Opt_user_xattr, 174 Opt_nouser_xattr, 175 Opt_inode64, 176 Opt_acl, 177 Opt_noacl, 178 Opt_usrquota, 179 Opt_grpquota, 180 Opt_resv_level, 181 Opt_dir_resv_level, 182 Opt_err, 183 }; 184 185 static const match_table_t tokens = { 186 {Opt_barrier, "barrier=%u"}, 187 {Opt_err_panic, "errors=panic"}, 188 {Opt_err_ro, "errors=remount-ro"}, 189 {Opt_intr, "intr"}, 190 {Opt_nointr, "nointr"}, 191 {Opt_hb_none, OCFS2_HB_NONE}, 192 {Opt_hb_local, OCFS2_HB_LOCAL}, 193 {Opt_data_ordered, "data=ordered"}, 194 {Opt_data_writeback, "data=writeback"}, 195 {Opt_atime_quantum, "atime_quantum=%u"}, 196 {Opt_slot, "preferred_slot=%u"}, 197 {Opt_commit, "commit=%u"}, 198 {Opt_localalloc, "localalloc=%d"}, 199 {Opt_localflocks, "localflocks"}, 200 {Opt_stack, "cluster_stack=%s"}, 201 {Opt_user_xattr, "user_xattr"}, 202 {Opt_nouser_xattr, "nouser_xattr"}, 203 {Opt_inode64, "inode64"}, 204 {Opt_acl, "acl"}, 205 {Opt_noacl, "noacl"}, 206 {Opt_usrquota, "usrquota"}, 207 {Opt_grpquota, "grpquota"}, 208 {Opt_resv_level, "resv_level=%u"}, 209 {Opt_dir_resv_level, "dir_resv_level=%u"}, 210 {Opt_err, NULL} 211 }; 212 213 #ifdef CONFIG_DEBUG_FS 214 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 215 { 216 struct ocfs2_cluster_connection *cconn = osb->cconn; 217 struct ocfs2_recovery_map *rm = osb->recovery_map; 218 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 219 int i, out = 0; 220 221 out += snprintf(buf + out, len - out, 222 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 223 "Device", osb->dev_str, osb->uuid_str, 224 osb->fs_generation, osb->vol_label); 225 226 out += snprintf(buf + out, len - out, 227 "%10s => State: %d Flags: 0x%lX\n", "Volume", 228 atomic_read(&osb->vol_state), osb->osb_flags); 229 230 out += snprintf(buf + out, len - out, 231 "%10s => Block: %lu Cluster: %d\n", "Sizes", 232 osb->sb->s_blocksize, osb->s_clustersize); 233 234 out += snprintf(buf + out, len - out, 235 "%10s => Compat: 0x%X Incompat: 0x%X " 236 "ROcompat: 0x%X\n", 237 "Features", osb->s_feature_compat, 238 osb->s_feature_incompat, osb->s_feature_ro_compat); 239 240 out += snprintf(buf + out, len - out, 241 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 242 osb->s_mount_opt, osb->s_atime_quantum); 243 244 if (cconn) { 245 out += snprintf(buf + out, len - out, 246 "%10s => Stack: %s Name: %*s " 247 "Version: %d.%d\n", "Cluster", 248 (*osb->osb_cluster_stack == '\0' ? 249 "o2cb" : osb->osb_cluster_stack), 250 cconn->cc_namelen, cconn->cc_name, 251 cconn->cc_version.pv_major, 252 cconn->cc_version.pv_minor); 253 } 254 255 spin_lock(&osb->dc_task_lock); 256 out += snprintf(buf + out, len - out, 257 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 258 "WorkSeq: %lu\n", "DownCnvt", 259 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 260 osb->blocked_lock_count, osb->dc_wake_sequence, 261 osb->dc_work_sequence); 262 spin_unlock(&osb->dc_task_lock); 263 264 spin_lock(&osb->osb_lock); 265 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 266 "Recovery", 267 (osb->recovery_thread_task ? 268 task_pid_nr(osb->recovery_thread_task) : -1)); 269 if (rm->rm_used == 0) 270 out += snprintf(buf + out, len - out, " None\n"); 271 else { 272 for (i = 0; i < rm->rm_used; i++) 273 out += snprintf(buf + out, len - out, " %d", 274 rm->rm_entries[i]); 275 out += snprintf(buf + out, len - out, "\n"); 276 } 277 spin_unlock(&osb->osb_lock); 278 279 out += snprintf(buf + out, len - out, 280 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 281 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 282 osb->osb_commit_interval, 283 atomic_read(&osb->needs_checkpoint)); 284 285 out += snprintf(buf + out, len - out, 286 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 287 "Journal", osb->journal->j_state, 288 osb->journal->j_trans_id, 289 atomic_read(&osb->journal->j_num_trans)); 290 291 out += snprintf(buf + out, len - out, 292 "%10s => GlobalAllocs: %d LocalAllocs: %d " 293 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 294 "Stats", 295 atomic_read(&osb->alloc_stats.bitmap_data), 296 atomic_read(&osb->alloc_stats.local_data), 297 atomic_read(&osb->alloc_stats.bg_allocs), 298 atomic_read(&osb->alloc_stats.moves), 299 atomic_read(&osb->alloc_stats.bg_extends)); 300 301 out += snprintf(buf + out, len - out, 302 "%10s => State: %u Descriptor: %llu Size: %u bits " 303 "Default: %u bits\n", 304 "LocalAlloc", osb->local_alloc_state, 305 (unsigned long long)osb->la_last_gd, 306 osb->local_alloc_bits, osb->local_alloc_default_bits); 307 308 spin_lock(&osb->osb_lock); 309 out += snprintf(buf + out, len - out, 310 "%10s => InodeSlot: %d StolenInodes: %d, " 311 "MetaSlot: %d StolenMeta: %d\n", "Steal", 312 osb->s_inode_steal_slot, 313 atomic_read(&osb->s_num_inodes_stolen), 314 osb->s_meta_steal_slot, 315 atomic_read(&osb->s_num_meta_stolen)); 316 spin_unlock(&osb->osb_lock); 317 318 out += snprintf(buf + out, len - out, "OrphanScan => "); 319 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 320 os->os_count, os->os_seqno); 321 out += snprintf(buf + out, len - out, " Last Scan: "); 322 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 323 out += snprintf(buf + out, len - out, "Disabled\n"); 324 else 325 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 326 (get_seconds() - os->os_scantime.tv_sec)); 327 328 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 329 "Slots", "Num", "RecoGen"); 330 for (i = 0; i < osb->max_slots; ++i) { 331 out += snprintf(buf + out, len - out, 332 "%10s %c %3d %10d\n", 333 " ", 334 (i == osb->slot_num ? '*' : ' '), 335 i, osb->slot_recovery_generations[i]); 336 } 337 338 return out; 339 } 340 341 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 342 { 343 struct ocfs2_super *osb = inode->i_private; 344 char *buf = NULL; 345 346 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 347 if (!buf) 348 goto bail; 349 350 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 351 352 file->private_data = buf; 353 354 return 0; 355 bail: 356 return -ENOMEM; 357 } 358 359 static int ocfs2_debug_release(struct inode *inode, struct file *file) 360 { 361 kfree(file->private_data); 362 return 0; 363 } 364 365 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 366 size_t nbytes, loff_t *ppos) 367 { 368 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 369 i_size_read(file->f_mapping->host)); 370 } 371 #else 372 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 373 { 374 return 0; 375 } 376 static int ocfs2_debug_release(struct inode *inode, struct file *file) 377 { 378 return 0; 379 } 380 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 381 size_t nbytes, loff_t *ppos) 382 { 383 return 0; 384 } 385 #endif /* CONFIG_DEBUG_FS */ 386 387 static const struct file_operations ocfs2_osb_debug_fops = { 388 .open = ocfs2_osb_debug_open, 389 .release = ocfs2_debug_release, 390 .read = ocfs2_debug_read, 391 .llseek = generic_file_llseek, 392 }; 393 394 static int ocfs2_sync_fs(struct super_block *sb, int wait) 395 { 396 int status; 397 tid_t target; 398 struct ocfs2_super *osb = OCFS2_SB(sb); 399 400 if (ocfs2_is_hard_readonly(osb)) 401 return -EROFS; 402 403 if (wait) { 404 status = ocfs2_flush_truncate_log(osb); 405 if (status < 0) 406 mlog_errno(status); 407 } else { 408 ocfs2_schedule_truncate_log_flush(osb, 0); 409 } 410 411 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 412 &target)) { 413 if (wait) 414 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 415 target); 416 } 417 return 0; 418 } 419 420 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 421 { 422 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 423 && (ino == USER_QUOTA_SYSTEM_INODE 424 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 425 return 0; 426 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 427 && (ino == GROUP_QUOTA_SYSTEM_INODE 428 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 429 return 0; 430 return 1; 431 } 432 433 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 434 { 435 struct inode *new = NULL; 436 int status = 0; 437 int i; 438 439 mlog_entry_void(); 440 441 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 442 if (IS_ERR(new)) { 443 status = PTR_ERR(new); 444 mlog_errno(status); 445 goto bail; 446 } 447 osb->root_inode = new; 448 449 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 450 if (IS_ERR(new)) { 451 status = PTR_ERR(new); 452 mlog_errno(status); 453 goto bail; 454 } 455 osb->sys_root_inode = new; 456 457 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 458 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 459 if (!ocfs2_need_system_inode(osb, i)) 460 continue; 461 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 462 if (!new) { 463 ocfs2_release_system_inodes(osb); 464 status = -EINVAL; 465 mlog_errno(status); 466 /* FIXME: Should ERROR_RO_FS */ 467 mlog(ML_ERROR, "Unable to load system inode %d, " 468 "possibly corrupt fs?", i); 469 goto bail; 470 } 471 // the array now has one ref, so drop this one 472 iput(new); 473 } 474 475 bail: 476 mlog_exit(status); 477 return status; 478 } 479 480 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 481 { 482 struct inode *new = NULL; 483 int status = 0; 484 int i; 485 486 mlog_entry_void(); 487 488 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 489 i < NUM_SYSTEM_INODES; 490 i++) { 491 if (!ocfs2_need_system_inode(osb, i)) 492 continue; 493 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 494 if (!new) { 495 ocfs2_release_system_inodes(osb); 496 status = -EINVAL; 497 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 498 status, i, osb->slot_num); 499 goto bail; 500 } 501 /* the array now has one ref, so drop this one */ 502 iput(new); 503 } 504 505 bail: 506 mlog_exit(status); 507 return status; 508 } 509 510 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 511 { 512 int i; 513 struct inode *inode; 514 515 mlog_entry_void(); 516 517 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 518 inode = osb->system_inodes[i]; 519 if (inode) { 520 iput(inode); 521 osb->system_inodes[i] = NULL; 522 } 523 } 524 525 inode = osb->sys_root_inode; 526 if (inode) { 527 iput(inode); 528 osb->sys_root_inode = NULL; 529 } 530 531 inode = osb->root_inode; 532 if (inode) { 533 iput(inode); 534 osb->root_inode = NULL; 535 } 536 537 mlog_exit(0); 538 } 539 540 /* We're allocating fs objects, use GFP_NOFS */ 541 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 542 { 543 struct ocfs2_inode_info *oi; 544 545 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 546 if (!oi) 547 return NULL; 548 549 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 550 return &oi->vfs_inode; 551 } 552 553 static void ocfs2_destroy_inode(struct inode *inode) 554 { 555 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 556 } 557 558 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 559 unsigned int cbits) 560 { 561 unsigned int bytes = 1 << cbits; 562 unsigned int trim = bytes; 563 unsigned int bitshift = 32; 564 565 /* 566 * i_size and all block offsets in ocfs2 are always 64 bits 567 * wide. i_clusters is 32 bits, in cluster-sized units. So on 568 * 64 bit platforms, cluster size will be the limiting factor. 569 */ 570 571 #if BITS_PER_LONG == 32 572 # if defined(CONFIG_LBDAF) 573 BUILD_BUG_ON(sizeof(sector_t) != 8); 574 /* 575 * We might be limited by page cache size. 576 */ 577 if (bytes > PAGE_CACHE_SIZE) { 578 bytes = PAGE_CACHE_SIZE; 579 trim = 1; 580 /* 581 * Shift by 31 here so that we don't get larger than 582 * MAX_LFS_FILESIZE 583 */ 584 bitshift = 31; 585 } 586 # else 587 /* 588 * We are limited by the size of sector_t. Use block size, as 589 * that's what we expose to the VFS. 590 */ 591 bytes = 1 << bbits; 592 trim = 1; 593 bitshift = 31; 594 # endif 595 #endif 596 597 /* 598 * Trim by a whole cluster when we can actually approach the 599 * on-disk limits. Otherwise we can overflow i_clusters when 600 * an extent start is at the max offset. 601 */ 602 return (((unsigned long long)bytes) << bitshift) - trim; 603 } 604 605 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 606 { 607 int incompat_features; 608 int ret = 0; 609 struct mount_options parsed_options; 610 struct ocfs2_super *osb = OCFS2_SB(sb); 611 612 lock_kernel(); 613 614 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 615 !ocfs2_check_set_options(sb, &parsed_options)) { 616 ret = -EINVAL; 617 goto out; 618 } 619 620 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 621 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 622 ret = -EINVAL; 623 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 624 goto out; 625 } 626 627 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 628 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 629 ret = -EINVAL; 630 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 631 goto out; 632 } 633 634 /* Probably don't want this on remount; it might 635 * mess with other nodes */ 636 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 637 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 638 ret = -EINVAL; 639 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 640 goto out; 641 } 642 643 /* We're going to/from readonly mode. */ 644 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 645 /* Disable quota accounting before remounting RO */ 646 if (*flags & MS_RDONLY) { 647 ret = ocfs2_susp_quotas(osb, 0); 648 if (ret < 0) 649 goto out; 650 } 651 /* Lock here so the check of HARD_RO and the potential 652 * setting of SOFT_RO is atomic. */ 653 spin_lock(&osb->osb_lock); 654 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 655 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 656 ret = -EROFS; 657 goto unlock_osb; 658 } 659 660 if (*flags & MS_RDONLY) { 661 mlog(0, "Going to ro mode.\n"); 662 sb->s_flags |= MS_RDONLY; 663 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 664 } else { 665 mlog(0, "Making ro filesystem writeable.\n"); 666 667 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 668 mlog(ML_ERROR, "Cannot remount RDWR " 669 "filesystem due to previous errors.\n"); 670 ret = -EROFS; 671 goto unlock_osb; 672 } 673 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 674 if (incompat_features) { 675 mlog(ML_ERROR, "Cannot remount RDWR because " 676 "of unsupported optional features " 677 "(%x).\n", incompat_features); 678 ret = -EINVAL; 679 goto unlock_osb; 680 } 681 sb->s_flags &= ~MS_RDONLY; 682 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 683 } 684 unlock_osb: 685 spin_unlock(&osb->osb_lock); 686 /* Enable quota accounting after remounting RW */ 687 if (!ret && !(*flags & MS_RDONLY)) { 688 if (sb_any_quota_suspended(sb)) 689 ret = ocfs2_susp_quotas(osb, 1); 690 else 691 ret = ocfs2_enable_quotas(osb); 692 if (ret < 0) { 693 /* Return back changes... */ 694 spin_lock(&osb->osb_lock); 695 sb->s_flags |= MS_RDONLY; 696 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 697 spin_unlock(&osb->osb_lock); 698 goto out; 699 } 700 } 701 } 702 703 if (!ret) { 704 /* Only save off the new mount options in case of a successful 705 * remount. */ 706 osb->s_mount_opt = parsed_options.mount_opt; 707 osb->s_atime_quantum = parsed_options.atime_quantum; 708 osb->preferred_slot = parsed_options.slot; 709 if (parsed_options.commit_interval) 710 osb->osb_commit_interval = parsed_options.commit_interval; 711 712 if (!ocfs2_is_hard_readonly(osb)) 713 ocfs2_set_journal_params(osb); 714 715 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 716 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 717 MS_POSIXACL : 0); 718 } 719 out: 720 unlock_kernel(); 721 return ret; 722 } 723 724 static int ocfs2_sb_probe(struct super_block *sb, 725 struct buffer_head **bh, 726 int *sector_size, 727 struct ocfs2_blockcheck_stats *stats) 728 { 729 int status, tmpstat; 730 struct ocfs1_vol_disk_hdr *hdr; 731 struct ocfs2_dinode *di; 732 int blksize; 733 734 *bh = NULL; 735 736 /* may be > 512 */ 737 *sector_size = bdev_logical_block_size(sb->s_bdev); 738 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 739 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 740 *sector_size, OCFS2_MAX_BLOCKSIZE); 741 status = -EINVAL; 742 goto bail; 743 } 744 745 /* Can this really happen? */ 746 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 747 *sector_size = OCFS2_MIN_BLOCKSIZE; 748 749 /* check block zero for old format */ 750 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 751 if (status < 0) { 752 mlog_errno(status); 753 goto bail; 754 } 755 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 756 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 757 mlog(ML_ERROR, "incompatible version: %u.%u\n", 758 hdr->major_version, hdr->minor_version); 759 status = -EINVAL; 760 } 761 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 762 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 763 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 764 hdr->signature); 765 status = -EINVAL; 766 } 767 brelse(*bh); 768 *bh = NULL; 769 if (status < 0) { 770 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 771 "upgraded before mounting with ocfs v2\n"); 772 goto bail; 773 } 774 775 /* 776 * Now check at magic offset for 512, 1024, 2048, 4096 777 * blocksizes. 4096 is the maximum blocksize because it is 778 * the minimum clustersize. 779 */ 780 status = -EINVAL; 781 for (blksize = *sector_size; 782 blksize <= OCFS2_MAX_BLOCKSIZE; 783 blksize <<= 1) { 784 tmpstat = ocfs2_get_sector(sb, bh, 785 OCFS2_SUPER_BLOCK_BLKNO, 786 blksize); 787 if (tmpstat < 0) { 788 status = tmpstat; 789 mlog_errno(status); 790 break; 791 } 792 di = (struct ocfs2_dinode *) (*bh)->b_data; 793 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 794 spin_lock_init(&stats->b_lock); 795 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 796 if (tmpstat < 0) { 797 brelse(*bh); 798 *bh = NULL; 799 } 800 if (tmpstat != -EAGAIN) { 801 status = tmpstat; 802 break; 803 } 804 } 805 806 bail: 807 return status; 808 } 809 810 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 811 { 812 if (ocfs2_mount_local(osb)) { 813 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 814 mlog(ML_ERROR, "Cannot heartbeat on a locally " 815 "mounted device.\n"); 816 return -EINVAL; 817 } 818 } 819 820 if (ocfs2_userspace_stack(osb)) { 821 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 822 mlog(ML_ERROR, "Userspace stack expected, but " 823 "o2cb heartbeat arguments passed to mount\n"); 824 return -EINVAL; 825 } 826 } 827 828 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 829 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 830 !ocfs2_userspace_stack(osb)) { 831 mlog(ML_ERROR, "Heartbeat has to be started to mount " 832 "a read-write clustered device.\n"); 833 return -EINVAL; 834 } 835 } 836 837 return 0; 838 } 839 840 /* 841 * If we're using a userspace stack, mount should have passed 842 * a name that matches the disk. If not, mount should not 843 * have passed a stack. 844 */ 845 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 846 struct mount_options *mopt) 847 { 848 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 849 mlog(ML_ERROR, 850 "cluster stack passed to mount, but this filesystem " 851 "does not support it\n"); 852 return -EINVAL; 853 } 854 855 if (ocfs2_userspace_stack(osb) && 856 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 857 OCFS2_STACK_LABEL_LEN)) { 858 mlog(ML_ERROR, 859 "cluster stack passed to mount (\"%s\") does not " 860 "match the filesystem (\"%s\")\n", 861 mopt->cluster_stack, 862 osb->osb_cluster_stack); 863 return -EINVAL; 864 } 865 866 return 0; 867 } 868 869 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 870 { 871 int type; 872 struct super_block *sb = osb->sb; 873 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 874 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 875 int status = 0; 876 877 for (type = 0; type < MAXQUOTAS; type++) { 878 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 879 continue; 880 if (unsuspend) 881 status = dquot_resume(sb, type); 882 else { 883 struct ocfs2_mem_dqinfo *oinfo; 884 885 /* Cancel periodic syncing before suspending */ 886 oinfo = sb_dqinfo(sb, type)->dqi_priv; 887 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 888 status = dquot_suspend(sb, type); 889 } 890 if (status < 0) 891 break; 892 } 893 if (status < 0) 894 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 895 "remount (error = %d).\n", status); 896 return status; 897 } 898 899 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 900 { 901 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 902 struct super_block *sb = osb->sb; 903 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 904 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 905 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 906 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 907 int status; 908 int type; 909 910 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 911 for (type = 0; type < MAXQUOTAS; type++) { 912 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 913 continue; 914 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 915 osb->slot_num); 916 if (!inode[type]) { 917 status = -ENOENT; 918 goto out_quota_off; 919 } 920 status = dquot_enable(inode[type], type, QFMT_OCFS2, 921 DQUOT_USAGE_ENABLED); 922 if (status < 0) 923 goto out_quota_off; 924 } 925 926 for (type = 0; type < MAXQUOTAS; type++) 927 iput(inode[type]); 928 return 0; 929 out_quota_off: 930 ocfs2_disable_quotas(osb); 931 for (type = 0; type < MAXQUOTAS; type++) 932 iput(inode[type]); 933 mlog_errno(status); 934 return status; 935 } 936 937 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 938 { 939 int type; 940 struct inode *inode; 941 struct super_block *sb = osb->sb; 942 struct ocfs2_mem_dqinfo *oinfo; 943 944 /* We mostly ignore errors in this function because there's not much 945 * we can do when we see them */ 946 for (type = 0; type < MAXQUOTAS; type++) { 947 if (!sb_has_quota_loaded(sb, type)) 948 continue; 949 /* Cancel periodic syncing before we grab dqonoff_mutex */ 950 oinfo = sb_dqinfo(sb, type)->dqi_priv; 951 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 952 inode = igrab(sb->s_dquot.files[type]); 953 /* Turn off quotas. This will remove all dquot structures from 954 * memory and so they will be automatically synced to global 955 * quota files */ 956 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 957 DQUOT_LIMITS_ENABLED); 958 if (!inode) 959 continue; 960 iput(inode); 961 } 962 } 963 964 /* Handle quota on quotactl */ 965 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 966 char *path) 967 { 968 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 969 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 970 971 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 972 return -EINVAL; 973 974 return dquot_enable(sb_dqopt(sb)->files[type], type, 975 format_id, DQUOT_LIMITS_ENABLED); 976 } 977 978 /* Handle quota off quotactl */ 979 static int ocfs2_quota_off(struct super_block *sb, int type) 980 { 981 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 982 } 983 984 static const struct quotactl_ops ocfs2_quotactl_ops = { 985 .quota_on = ocfs2_quota_on, 986 .quota_off = ocfs2_quota_off, 987 .quota_sync = dquot_quota_sync, 988 .get_info = dquot_get_dqinfo, 989 .set_info = dquot_set_dqinfo, 990 .get_dqblk = dquot_get_dqblk, 991 .set_dqblk = dquot_set_dqblk, 992 }; 993 994 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 995 { 996 struct dentry *root; 997 int status, sector_size; 998 struct mount_options parsed_options; 999 struct inode *inode = NULL; 1000 struct ocfs2_super *osb = NULL; 1001 struct buffer_head *bh = NULL; 1002 char nodestr[8]; 1003 struct ocfs2_blockcheck_stats stats; 1004 1005 mlog_entry("%p, %p, %i", sb, data, silent); 1006 1007 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1008 status = -EINVAL; 1009 goto read_super_error; 1010 } 1011 1012 /* probe for superblock */ 1013 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1014 if (status < 0) { 1015 mlog(ML_ERROR, "superblock probe failed!\n"); 1016 goto read_super_error; 1017 } 1018 1019 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1020 osb = OCFS2_SB(sb); 1021 if (status < 0) { 1022 mlog_errno(status); 1023 goto read_super_error; 1024 } 1025 brelse(bh); 1026 bh = NULL; 1027 1028 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1029 status = -EINVAL; 1030 goto read_super_error; 1031 } 1032 osb->s_mount_opt = parsed_options.mount_opt; 1033 osb->s_atime_quantum = parsed_options.atime_quantum; 1034 osb->preferred_slot = parsed_options.slot; 1035 osb->osb_commit_interval = parsed_options.commit_interval; 1036 1037 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1038 osb->osb_resv_level = parsed_options.resv_level; 1039 osb->osb_dir_resv_level = parsed_options.resv_level; 1040 if (parsed_options.dir_resv_level == -1) 1041 osb->osb_dir_resv_level = parsed_options.resv_level; 1042 else 1043 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1044 1045 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1046 if (status) 1047 goto read_super_error; 1048 1049 sb->s_magic = OCFS2_SUPER_MAGIC; 1050 1051 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1052 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1053 1054 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1055 * heartbeat=none */ 1056 if (bdev_read_only(sb->s_bdev)) { 1057 if (!(sb->s_flags & MS_RDONLY)) { 1058 status = -EACCES; 1059 mlog(ML_ERROR, "Readonly device detected but readonly " 1060 "mount was not specified.\n"); 1061 goto read_super_error; 1062 } 1063 1064 /* You should not be able to start a local heartbeat 1065 * on a readonly device. */ 1066 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1067 status = -EROFS; 1068 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1069 "device.\n"); 1070 goto read_super_error; 1071 } 1072 1073 status = ocfs2_check_journals_nolocks(osb); 1074 if (status < 0) { 1075 if (status == -EROFS) 1076 mlog(ML_ERROR, "Recovery required on readonly " 1077 "file system, but write access is " 1078 "unavailable.\n"); 1079 else 1080 mlog_errno(status); 1081 goto read_super_error; 1082 } 1083 1084 ocfs2_set_ro_flag(osb, 1); 1085 1086 printk(KERN_NOTICE "Readonly device detected. No cluster " 1087 "services will be utilized for this mount. Recovery " 1088 "will be skipped.\n"); 1089 } 1090 1091 if (!ocfs2_is_hard_readonly(osb)) { 1092 if (sb->s_flags & MS_RDONLY) 1093 ocfs2_set_ro_flag(osb, 0); 1094 } 1095 1096 status = ocfs2_verify_heartbeat(osb); 1097 if (status < 0) { 1098 mlog_errno(status); 1099 goto read_super_error; 1100 } 1101 1102 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1103 ocfs2_debugfs_root); 1104 if (!osb->osb_debug_root) { 1105 status = -EINVAL; 1106 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1107 goto read_super_error; 1108 } 1109 1110 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1111 osb->osb_debug_root, 1112 osb, 1113 &ocfs2_osb_debug_fops); 1114 if (!osb->osb_ctxt) { 1115 status = -EINVAL; 1116 mlog_errno(status); 1117 goto read_super_error; 1118 } 1119 1120 if (ocfs2_meta_ecc(osb)) { 1121 status = ocfs2_blockcheck_stats_debugfs_install( 1122 &osb->osb_ecc_stats, 1123 osb->osb_debug_root); 1124 if (status) { 1125 mlog(ML_ERROR, 1126 "Unable to create blockcheck statistics " 1127 "files\n"); 1128 goto read_super_error; 1129 } 1130 } 1131 1132 status = ocfs2_mount_volume(sb); 1133 if (osb->root_inode) 1134 inode = igrab(osb->root_inode); 1135 1136 if (status < 0) 1137 goto read_super_error; 1138 1139 if (!inode) { 1140 status = -EIO; 1141 mlog_errno(status); 1142 goto read_super_error; 1143 } 1144 1145 root = d_alloc_root(inode); 1146 if (!root) { 1147 status = -ENOMEM; 1148 mlog_errno(status); 1149 goto read_super_error; 1150 } 1151 1152 sb->s_root = root; 1153 1154 ocfs2_complete_mount_recovery(osb); 1155 1156 if (ocfs2_mount_local(osb)) 1157 snprintf(nodestr, sizeof(nodestr), "local"); 1158 else 1159 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1160 1161 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1162 "with %s data mode.\n", 1163 osb->dev_str, nodestr, osb->slot_num, 1164 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1165 "ordered"); 1166 1167 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1168 wake_up(&osb->osb_mount_event); 1169 1170 /* Now we can initialize quotas because we can afford to wait 1171 * for cluster locks recovery now. That also means that truncation 1172 * log recovery can happen but that waits for proper quota setup */ 1173 if (!(sb->s_flags & MS_RDONLY)) { 1174 status = ocfs2_enable_quotas(osb); 1175 if (status < 0) { 1176 /* We have to err-out specially here because 1177 * s_root is already set */ 1178 mlog_errno(status); 1179 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1180 wake_up(&osb->osb_mount_event); 1181 mlog_exit(status); 1182 return status; 1183 } 1184 } 1185 1186 ocfs2_complete_quota_recovery(osb); 1187 1188 /* Now we wake up again for processes waiting for quotas */ 1189 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1190 wake_up(&osb->osb_mount_event); 1191 1192 /* Start this when the mount is almost sure of being successful */ 1193 ocfs2_orphan_scan_start(osb); 1194 1195 mlog_exit(status); 1196 return status; 1197 1198 read_super_error: 1199 brelse(bh); 1200 1201 if (inode) 1202 iput(inode); 1203 1204 if (osb) { 1205 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1206 wake_up(&osb->osb_mount_event); 1207 ocfs2_dismount_volume(sb, 1); 1208 } 1209 1210 mlog_exit(status); 1211 return status; 1212 } 1213 1214 static int ocfs2_get_sb(struct file_system_type *fs_type, 1215 int flags, 1216 const char *dev_name, 1217 void *data, 1218 struct vfsmount *mnt) 1219 { 1220 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 1221 mnt); 1222 } 1223 1224 static void ocfs2_kill_sb(struct super_block *sb) 1225 { 1226 struct ocfs2_super *osb = OCFS2_SB(sb); 1227 1228 /* Failed mount? */ 1229 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1230 goto out; 1231 1232 /* Prevent further queueing of inode drop events */ 1233 spin_lock(&dentry_list_lock); 1234 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1235 spin_unlock(&dentry_list_lock); 1236 /* Wait for work to finish and/or remove it */ 1237 cancel_work_sync(&osb->dentry_lock_work); 1238 out: 1239 kill_block_super(sb); 1240 } 1241 1242 static struct file_system_type ocfs2_fs_type = { 1243 .owner = THIS_MODULE, 1244 .name = "ocfs2", 1245 .get_sb = ocfs2_get_sb, /* is this called when we mount 1246 * the fs? */ 1247 .kill_sb = ocfs2_kill_sb, 1248 1249 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1250 .next = NULL 1251 }; 1252 1253 static int ocfs2_check_set_options(struct super_block *sb, 1254 struct mount_options *options) 1255 { 1256 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1257 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1258 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1259 mlog(ML_ERROR, "User quotas were requested, but this " 1260 "filesystem does not have the feature enabled.\n"); 1261 return 0; 1262 } 1263 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1264 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1265 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1266 mlog(ML_ERROR, "Group quotas were requested, but this " 1267 "filesystem does not have the feature enabled.\n"); 1268 return 0; 1269 } 1270 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1271 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1272 mlog(ML_ERROR, "ACL support requested but extended attributes " 1273 "feature is not enabled\n"); 1274 return 0; 1275 } 1276 /* No ACL setting specified? Use XATTR feature... */ 1277 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1278 OCFS2_MOUNT_NO_POSIX_ACL))) { 1279 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1280 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1281 else 1282 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1283 } 1284 return 1; 1285 } 1286 1287 static int ocfs2_parse_options(struct super_block *sb, 1288 char *options, 1289 struct mount_options *mopt, 1290 int is_remount) 1291 { 1292 int status; 1293 char *p; 1294 1295 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1296 options ? options : "(none)"); 1297 1298 mopt->commit_interval = 0; 1299 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1300 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1301 mopt->slot = OCFS2_INVALID_SLOT; 1302 mopt->localalloc_opt = -1; 1303 mopt->cluster_stack[0] = '\0'; 1304 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1305 mopt->dir_resv_level = -1; 1306 1307 if (!options) { 1308 status = 1; 1309 goto bail; 1310 } 1311 1312 while ((p = strsep(&options, ",")) != NULL) { 1313 int token, option; 1314 substring_t args[MAX_OPT_ARGS]; 1315 1316 if (!*p) 1317 continue; 1318 1319 token = match_token(p, tokens, args); 1320 switch (token) { 1321 case Opt_hb_local: 1322 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1323 break; 1324 case Opt_hb_none: 1325 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 1326 break; 1327 case Opt_barrier: 1328 if (match_int(&args[0], &option)) { 1329 status = 0; 1330 goto bail; 1331 } 1332 if (option) 1333 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1334 else 1335 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1336 break; 1337 case Opt_intr: 1338 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1339 break; 1340 case Opt_nointr: 1341 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1342 break; 1343 case Opt_err_panic: 1344 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1345 break; 1346 case Opt_err_ro: 1347 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1348 break; 1349 case Opt_data_ordered: 1350 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1351 break; 1352 case Opt_data_writeback: 1353 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1354 break; 1355 case Opt_user_xattr: 1356 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1357 break; 1358 case Opt_nouser_xattr: 1359 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1360 break; 1361 case Opt_atime_quantum: 1362 if (match_int(&args[0], &option)) { 1363 status = 0; 1364 goto bail; 1365 } 1366 if (option >= 0) 1367 mopt->atime_quantum = option; 1368 break; 1369 case Opt_slot: 1370 option = 0; 1371 if (match_int(&args[0], &option)) { 1372 status = 0; 1373 goto bail; 1374 } 1375 if (option) 1376 mopt->slot = (s16)option; 1377 break; 1378 case Opt_commit: 1379 option = 0; 1380 if (match_int(&args[0], &option)) { 1381 status = 0; 1382 goto bail; 1383 } 1384 if (option < 0) 1385 return 0; 1386 if (option == 0) 1387 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1388 mopt->commit_interval = HZ * option; 1389 break; 1390 case Opt_localalloc: 1391 option = 0; 1392 if (match_int(&args[0], &option)) { 1393 status = 0; 1394 goto bail; 1395 } 1396 if (option >= 0) 1397 mopt->localalloc_opt = option; 1398 break; 1399 case Opt_localflocks: 1400 /* 1401 * Changing this during remount could race 1402 * flock() requests, or "unbalance" existing 1403 * ones (e.g., a lock is taken in one mode but 1404 * dropped in the other). If users care enough 1405 * to flip locking modes during remount, we 1406 * could add a "local" flag to individual 1407 * flock structures for proper tracking of 1408 * state. 1409 */ 1410 if (!is_remount) 1411 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1412 break; 1413 case Opt_stack: 1414 /* Check both that the option we were passed 1415 * is of the right length and that it is a proper 1416 * string of the right length. 1417 */ 1418 if (((args[0].to - args[0].from) != 1419 OCFS2_STACK_LABEL_LEN) || 1420 (strnlen(args[0].from, 1421 OCFS2_STACK_LABEL_LEN) != 1422 OCFS2_STACK_LABEL_LEN)) { 1423 mlog(ML_ERROR, 1424 "Invalid cluster_stack option\n"); 1425 status = 0; 1426 goto bail; 1427 } 1428 memcpy(mopt->cluster_stack, args[0].from, 1429 OCFS2_STACK_LABEL_LEN); 1430 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1431 break; 1432 case Opt_inode64: 1433 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1434 break; 1435 case Opt_usrquota: 1436 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1437 break; 1438 case Opt_grpquota: 1439 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1440 break; 1441 case Opt_acl: 1442 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1443 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1444 break; 1445 case Opt_noacl: 1446 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1447 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1448 break; 1449 case Opt_resv_level: 1450 if (is_remount) 1451 break; 1452 if (match_int(&args[0], &option)) { 1453 status = 0; 1454 goto bail; 1455 } 1456 if (option >= OCFS2_MIN_RESV_LEVEL && 1457 option < OCFS2_MAX_RESV_LEVEL) 1458 mopt->resv_level = option; 1459 break; 1460 case Opt_dir_resv_level: 1461 if (is_remount) 1462 break; 1463 if (match_int(&args[0], &option)) { 1464 status = 0; 1465 goto bail; 1466 } 1467 if (option >= OCFS2_MIN_RESV_LEVEL && 1468 option < OCFS2_MAX_RESV_LEVEL) 1469 mopt->dir_resv_level = option; 1470 break; 1471 default: 1472 mlog(ML_ERROR, 1473 "Unrecognized mount option \"%s\" " 1474 "or missing value\n", p); 1475 status = 0; 1476 goto bail; 1477 } 1478 } 1479 1480 status = 1; 1481 1482 bail: 1483 mlog_exit(status); 1484 return status; 1485 } 1486 1487 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1488 { 1489 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1490 unsigned long opts = osb->s_mount_opt; 1491 unsigned int local_alloc_megs; 1492 1493 if (opts & OCFS2_MOUNT_HB_LOCAL) 1494 seq_printf(s, ",_netdev,heartbeat=local"); 1495 else 1496 seq_printf(s, ",heartbeat=none"); 1497 1498 if (opts & OCFS2_MOUNT_NOINTR) 1499 seq_printf(s, ",nointr"); 1500 1501 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1502 seq_printf(s, ",data=writeback"); 1503 else 1504 seq_printf(s, ",data=ordered"); 1505 1506 if (opts & OCFS2_MOUNT_BARRIER) 1507 seq_printf(s, ",barrier=1"); 1508 1509 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1510 seq_printf(s, ",errors=panic"); 1511 else 1512 seq_printf(s, ",errors=remount-ro"); 1513 1514 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1515 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1516 1517 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1518 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1519 1520 if (osb->osb_commit_interval) 1521 seq_printf(s, ",commit=%u", 1522 (unsigned) (osb->osb_commit_interval / HZ)); 1523 1524 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1525 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1526 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1527 1528 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1529 seq_printf(s, ",localflocks,"); 1530 1531 if (osb->osb_cluster_stack[0]) 1532 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1533 osb->osb_cluster_stack); 1534 if (opts & OCFS2_MOUNT_USRQUOTA) 1535 seq_printf(s, ",usrquota"); 1536 if (opts & OCFS2_MOUNT_GRPQUOTA) 1537 seq_printf(s, ",grpquota"); 1538 1539 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1540 seq_printf(s, ",nouser_xattr"); 1541 else 1542 seq_printf(s, ",user_xattr"); 1543 1544 if (opts & OCFS2_MOUNT_INODE64) 1545 seq_printf(s, ",inode64"); 1546 1547 if (opts & OCFS2_MOUNT_POSIX_ACL) 1548 seq_printf(s, ",acl"); 1549 else 1550 seq_printf(s, ",noacl"); 1551 1552 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1553 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1554 1555 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1556 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1557 1558 return 0; 1559 } 1560 1561 static int __init ocfs2_init(void) 1562 { 1563 int status; 1564 1565 mlog_entry_void(); 1566 1567 ocfs2_print_version(); 1568 1569 status = init_ocfs2_uptodate_cache(); 1570 if (status < 0) { 1571 mlog_errno(status); 1572 goto leave; 1573 } 1574 1575 status = ocfs2_initialize_mem_caches(); 1576 if (status < 0) { 1577 mlog_errno(status); 1578 goto leave; 1579 } 1580 1581 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1582 if (!ocfs2_wq) { 1583 status = -ENOMEM; 1584 goto leave; 1585 } 1586 1587 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1588 if (!ocfs2_debugfs_root) { 1589 status = -EFAULT; 1590 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1591 } 1592 1593 status = ocfs2_quota_setup(); 1594 if (status) 1595 goto leave; 1596 1597 ocfs2_set_locking_protocol(); 1598 1599 status = register_quota_format(&ocfs2_quota_format); 1600 leave: 1601 if (status < 0) { 1602 ocfs2_quota_shutdown(); 1603 ocfs2_free_mem_caches(); 1604 exit_ocfs2_uptodate_cache(); 1605 } 1606 1607 mlog_exit(status); 1608 1609 if (status >= 0) { 1610 return register_filesystem(&ocfs2_fs_type); 1611 } else 1612 return -1; 1613 } 1614 1615 static void __exit ocfs2_exit(void) 1616 { 1617 mlog_entry_void(); 1618 1619 ocfs2_quota_shutdown(); 1620 1621 if (ocfs2_wq) { 1622 flush_workqueue(ocfs2_wq); 1623 destroy_workqueue(ocfs2_wq); 1624 } 1625 1626 unregister_quota_format(&ocfs2_quota_format); 1627 1628 debugfs_remove(ocfs2_debugfs_root); 1629 1630 ocfs2_free_mem_caches(); 1631 1632 unregister_filesystem(&ocfs2_fs_type); 1633 1634 exit_ocfs2_uptodate_cache(); 1635 1636 mlog_exit_void(); 1637 } 1638 1639 static void ocfs2_put_super(struct super_block *sb) 1640 { 1641 mlog_entry("(0x%p)\n", sb); 1642 1643 lock_kernel(); 1644 1645 ocfs2_sync_blockdev(sb); 1646 ocfs2_dismount_volume(sb, 0); 1647 1648 unlock_kernel(); 1649 1650 mlog_exit_void(); 1651 } 1652 1653 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1654 { 1655 struct ocfs2_super *osb; 1656 u32 numbits, freebits; 1657 int status; 1658 struct ocfs2_dinode *bm_lock; 1659 struct buffer_head *bh = NULL; 1660 struct inode *inode = NULL; 1661 1662 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1663 1664 osb = OCFS2_SB(dentry->d_sb); 1665 1666 inode = ocfs2_get_system_file_inode(osb, 1667 GLOBAL_BITMAP_SYSTEM_INODE, 1668 OCFS2_INVALID_SLOT); 1669 if (!inode) { 1670 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1671 status = -EIO; 1672 goto bail; 1673 } 1674 1675 status = ocfs2_inode_lock(inode, &bh, 0); 1676 if (status < 0) { 1677 mlog_errno(status); 1678 goto bail; 1679 } 1680 1681 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1682 1683 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1684 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1685 1686 buf->f_type = OCFS2_SUPER_MAGIC; 1687 buf->f_bsize = dentry->d_sb->s_blocksize; 1688 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1689 buf->f_blocks = ((sector_t) numbits) * 1690 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1691 buf->f_bfree = ((sector_t) freebits) * 1692 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1693 buf->f_bavail = buf->f_bfree; 1694 buf->f_files = numbits; 1695 buf->f_ffree = freebits; 1696 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1697 & 0xFFFFFFFFUL; 1698 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1699 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1700 1701 brelse(bh); 1702 1703 ocfs2_inode_unlock(inode, 0); 1704 status = 0; 1705 bail: 1706 if (inode) 1707 iput(inode); 1708 1709 mlog_exit(status); 1710 1711 return status; 1712 } 1713 1714 static void ocfs2_inode_init_once(void *data) 1715 { 1716 struct ocfs2_inode_info *oi = data; 1717 1718 oi->ip_flags = 0; 1719 oi->ip_open_count = 0; 1720 spin_lock_init(&oi->ip_lock); 1721 ocfs2_extent_map_init(&oi->vfs_inode); 1722 INIT_LIST_HEAD(&oi->ip_io_markers); 1723 oi->ip_dir_start_lookup = 0; 1724 1725 init_rwsem(&oi->ip_alloc_sem); 1726 init_rwsem(&oi->ip_xattr_sem); 1727 mutex_init(&oi->ip_io_mutex); 1728 1729 oi->ip_blkno = 0ULL; 1730 oi->ip_clusters = 0; 1731 1732 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1733 1734 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1735 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1736 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1737 1738 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1739 &ocfs2_inode_caching_ops); 1740 1741 inode_init_once(&oi->vfs_inode); 1742 } 1743 1744 static int ocfs2_initialize_mem_caches(void) 1745 { 1746 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1747 sizeof(struct ocfs2_inode_info), 1748 0, 1749 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1750 SLAB_MEM_SPREAD), 1751 ocfs2_inode_init_once); 1752 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1753 sizeof(struct ocfs2_dquot), 1754 0, 1755 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1756 SLAB_MEM_SPREAD), 1757 NULL); 1758 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1759 sizeof(struct ocfs2_quota_chunk), 1760 0, 1761 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1762 NULL); 1763 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1764 !ocfs2_qf_chunk_cachep) { 1765 if (ocfs2_inode_cachep) 1766 kmem_cache_destroy(ocfs2_inode_cachep); 1767 if (ocfs2_dquot_cachep) 1768 kmem_cache_destroy(ocfs2_dquot_cachep); 1769 if (ocfs2_qf_chunk_cachep) 1770 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1771 return -ENOMEM; 1772 } 1773 1774 return 0; 1775 } 1776 1777 static void ocfs2_free_mem_caches(void) 1778 { 1779 if (ocfs2_inode_cachep) 1780 kmem_cache_destroy(ocfs2_inode_cachep); 1781 ocfs2_inode_cachep = NULL; 1782 1783 if (ocfs2_dquot_cachep) 1784 kmem_cache_destroy(ocfs2_dquot_cachep); 1785 ocfs2_dquot_cachep = NULL; 1786 1787 if (ocfs2_qf_chunk_cachep) 1788 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1789 ocfs2_qf_chunk_cachep = NULL; 1790 } 1791 1792 static int ocfs2_get_sector(struct super_block *sb, 1793 struct buffer_head **bh, 1794 int block, 1795 int sect_size) 1796 { 1797 if (!sb_set_blocksize(sb, sect_size)) { 1798 mlog(ML_ERROR, "unable to set blocksize\n"); 1799 return -EIO; 1800 } 1801 1802 *bh = sb_getblk(sb, block); 1803 if (!*bh) { 1804 mlog_errno(-EIO); 1805 return -EIO; 1806 } 1807 lock_buffer(*bh); 1808 if (!buffer_dirty(*bh)) 1809 clear_buffer_uptodate(*bh); 1810 unlock_buffer(*bh); 1811 ll_rw_block(READ, 1, bh); 1812 wait_on_buffer(*bh); 1813 if (!buffer_uptodate(*bh)) { 1814 mlog_errno(-EIO); 1815 brelse(*bh); 1816 *bh = NULL; 1817 return -EIO; 1818 } 1819 1820 return 0; 1821 } 1822 1823 static int ocfs2_mount_volume(struct super_block *sb) 1824 { 1825 int status = 0; 1826 int unlock_super = 0; 1827 struct ocfs2_super *osb = OCFS2_SB(sb); 1828 1829 mlog_entry_void(); 1830 1831 if (ocfs2_is_hard_readonly(osb)) 1832 goto leave; 1833 1834 status = ocfs2_dlm_init(osb); 1835 if (status < 0) { 1836 mlog_errno(status); 1837 goto leave; 1838 } 1839 1840 status = ocfs2_super_lock(osb, 1); 1841 if (status < 0) { 1842 mlog_errno(status); 1843 goto leave; 1844 } 1845 unlock_super = 1; 1846 1847 /* This will load up the node map and add ourselves to it. */ 1848 status = ocfs2_find_slot(osb); 1849 if (status < 0) { 1850 mlog_errno(status); 1851 goto leave; 1852 } 1853 1854 /* load all node-local system inodes */ 1855 status = ocfs2_init_local_system_inodes(osb); 1856 if (status < 0) { 1857 mlog_errno(status); 1858 goto leave; 1859 } 1860 1861 status = ocfs2_check_volume(osb); 1862 if (status < 0) { 1863 mlog_errno(status); 1864 goto leave; 1865 } 1866 1867 status = ocfs2_truncate_log_init(osb); 1868 if (status < 0) 1869 mlog_errno(status); 1870 1871 leave: 1872 if (unlock_super) 1873 ocfs2_super_unlock(osb, 1); 1874 1875 mlog_exit(status); 1876 return status; 1877 } 1878 1879 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1880 { 1881 int tmp, hangup_needed = 0; 1882 struct ocfs2_super *osb = NULL; 1883 char nodestr[8]; 1884 1885 mlog_entry("(0x%p)\n", sb); 1886 1887 BUG_ON(!sb); 1888 osb = OCFS2_SB(sb); 1889 BUG_ON(!osb); 1890 1891 debugfs_remove(osb->osb_ctxt); 1892 1893 /* 1894 * Flush inode dropping work queue so that deletes are 1895 * performed while the filesystem is still working 1896 */ 1897 ocfs2_drop_all_dl_inodes(osb); 1898 1899 /* Orphan scan should be stopped as early as possible */ 1900 ocfs2_orphan_scan_stop(osb); 1901 1902 ocfs2_disable_quotas(osb); 1903 1904 ocfs2_shutdown_local_alloc(osb); 1905 1906 ocfs2_truncate_log_shutdown(osb); 1907 1908 /* This will disable recovery and flush any recovery work. */ 1909 ocfs2_recovery_exit(osb); 1910 1911 ocfs2_journal_shutdown(osb); 1912 1913 ocfs2_sync_blockdev(sb); 1914 1915 ocfs2_purge_refcount_trees(osb); 1916 1917 /* No cluster connection means we've failed during mount, so skip 1918 * all the steps which depended on that to complete. */ 1919 if (osb->cconn) { 1920 tmp = ocfs2_super_lock(osb, 1); 1921 if (tmp < 0) { 1922 mlog_errno(tmp); 1923 return; 1924 } 1925 } 1926 1927 if (osb->slot_num != OCFS2_INVALID_SLOT) 1928 ocfs2_put_slot(osb); 1929 1930 if (osb->cconn) 1931 ocfs2_super_unlock(osb, 1); 1932 1933 ocfs2_release_system_inodes(osb); 1934 1935 /* 1936 * If we're dismounting due to mount error, mount.ocfs2 will clean 1937 * up heartbeat. If we're a local mount, there is no heartbeat. 1938 * If we failed before we got a uuid_str yet, we can't stop 1939 * heartbeat. Otherwise, do it. 1940 */ 1941 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1942 hangup_needed = 1; 1943 1944 if (osb->cconn) 1945 ocfs2_dlm_shutdown(osb, hangup_needed); 1946 1947 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1948 debugfs_remove(osb->osb_debug_root); 1949 1950 if (hangup_needed) 1951 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1952 1953 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1954 1955 if (ocfs2_mount_local(osb)) 1956 snprintf(nodestr, sizeof(nodestr), "local"); 1957 else 1958 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1959 1960 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1961 osb->dev_str, nodestr); 1962 1963 ocfs2_delete_osb(osb); 1964 kfree(osb); 1965 sb->s_dev = 0; 1966 sb->s_fs_info = NULL; 1967 } 1968 1969 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1970 unsigned uuid_bytes) 1971 { 1972 int i, ret; 1973 char *ptr; 1974 1975 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1976 1977 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1978 if (osb->uuid_str == NULL) 1979 return -ENOMEM; 1980 1981 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1982 /* print with null */ 1983 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1984 if (ret != 2) /* drop super cleans up */ 1985 return -EINVAL; 1986 /* then only advance past the last char */ 1987 ptr += 2; 1988 } 1989 1990 return 0; 1991 } 1992 1993 static int ocfs2_initialize_super(struct super_block *sb, 1994 struct buffer_head *bh, 1995 int sector_size, 1996 struct ocfs2_blockcheck_stats *stats) 1997 { 1998 int status; 1999 int i, cbits, bbits; 2000 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2001 struct inode *inode = NULL; 2002 struct ocfs2_journal *journal; 2003 __le32 uuid_net_key; 2004 struct ocfs2_super *osb; 2005 2006 mlog_entry_void(); 2007 2008 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2009 if (!osb) { 2010 status = -ENOMEM; 2011 mlog_errno(status); 2012 goto bail; 2013 } 2014 2015 sb->s_fs_info = osb; 2016 sb->s_op = &ocfs2_sops; 2017 sb->s_export_op = &ocfs2_export_ops; 2018 sb->s_qcop = &ocfs2_quotactl_ops; 2019 sb->dq_op = &ocfs2_quota_operations; 2020 sb->s_xattr = ocfs2_xattr_handlers; 2021 sb->s_time_gran = 1; 2022 sb->s_flags |= MS_NOATIME; 2023 /* this is needed to support O_LARGEFILE */ 2024 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2025 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2026 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2027 2028 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2029 2030 for (i = 0; i < 3; i++) 2031 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2032 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2033 2034 osb->sb = sb; 2035 /* Save off for ocfs2_rw_direct */ 2036 osb->s_sectsize_bits = blksize_bits(sector_size); 2037 BUG_ON(!osb->s_sectsize_bits); 2038 2039 spin_lock_init(&osb->dc_task_lock); 2040 init_waitqueue_head(&osb->dc_event); 2041 osb->dc_work_sequence = 0; 2042 osb->dc_wake_sequence = 0; 2043 INIT_LIST_HEAD(&osb->blocked_lock_list); 2044 osb->blocked_lock_count = 0; 2045 spin_lock_init(&osb->osb_lock); 2046 spin_lock_init(&osb->osb_xattr_lock); 2047 ocfs2_init_steal_slots(osb); 2048 2049 atomic_set(&osb->alloc_stats.moves, 0); 2050 atomic_set(&osb->alloc_stats.local_data, 0); 2051 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2052 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2053 atomic_set(&osb->alloc_stats.bg_extends, 0); 2054 2055 /* Copy the blockcheck stats from the superblock probe */ 2056 osb->osb_ecc_stats = *stats; 2057 2058 ocfs2_init_node_maps(osb); 2059 2060 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2061 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2062 2063 ocfs2_orphan_scan_init(osb); 2064 2065 status = ocfs2_recovery_init(osb); 2066 if (status) { 2067 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2068 mlog_errno(status); 2069 goto bail; 2070 } 2071 2072 init_waitqueue_head(&osb->checkpoint_event); 2073 atomic_set(&osb->needs_checkpoint, 0); 2074 2075 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2076 2077 osb->slot_num = OCFS2_INVALID_SLOT; 2078 2079 osb->s_xattr_inline_size = le16_to_cpu( 2080 di->id2.i_super.s_xattr_inline_size); 2081 2082 osb->local_alloc_state = OCFS2_LA_UNUSED; 2083 osb->local_alloc_bh = NULL; 2084 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2085 2086 init_waitqueue_head(&osb->osb_mount_event); 2087 2088 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2089 if (status) { 2090 mlog_errno(status); 2091 goto bail; 2092 } 2093 2094 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2095 if (!osb->vol_label) { 2096 mlog(ML_ERROR, "unable to alloc vol label\n"); 2097 status = -ENOMEM; 2098 goto bail; 2099 } 2100 2101 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2102 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2103 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2104 osb->max_slots); 2105 status = -EINVAL; 2106 goto bail; 2107 } 2108 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 2109 2110 osb->slot_recovery_generations = 2111 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2112 GFP_KERNEL); 2113 if (!osb->slot_recovery_generations) { 2114 status = -ENOMEM; 2115 mlog_errno(status); 2116 goto bail; 2117 } 2118 2119 init_waitqueue_head(&osb->osb_wipe_event); 2120 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2121 sizeof(*osb->osb_orphan_wipes), 2122 GFP_KERNEL); 2123 if (!osb->osb_orphan_wipes) { 2124 status = -ENOMEM; 2125 mlog_errno(status); 2126 goto bail; 2127 } 2128 2129 osb->osb_rf_lock_tree = RB_ROOT; 2130 2131 osb->s_feature_compat = 2132 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2133 osb->s_feature_ro_compat = 2134 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2135 osb->s_feature_incompat = 2136 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2137 2138 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2139 mlog(ML_ERROR, "couldn't mount because of unsupported " 2140 "optional features (%x).\n", i); 2141 status = -EINVAL; 2142 goto bail; 2143 } 2144 if (!(osb->sb->s_flags & MS_RDONLY) && 2145 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2146 mlog(ML_ERROR, "couldn't mount RDWR because of " 2147 "unsupported optional features (%x).\n", i); 2148 status = -EINVAL; 2149 goto bail; 2150 } 2151 2152 if (ocfs2_userspace_stack(osb)) { 2153 memcpy(osb->osb_cluster_stack, 2154 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2155 OCFS2_STACK_LABEL_LEN); 2156 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2157 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2158 mlog(ML_ERROR, 2159 "couldn't mount because of an invalid " 2160 "cluster stack label (%s) \n", 2161 osb->osb_cluster_stack); 2162 status = -EINVAL; 2163 goto bail; 2164 } 2165 } else { 2166 /* The empty string is identical with classic tools that 2167 * don't know about s_cluster_info. */ 2168 osb->osb_cluster_stack[0] = '\0'; 2169 } 2170 2171 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2172 2173 /* FIXME 2174 * This should be done in ocfs2_journal_init(), but unknown 2175 * ordering issues will cause the filesystem to crash. 2176 * If anyone wants to figure out what part of the code 2177 * refers to osb->journal before ocfs2_journal_init() is run, 2178 * be my guest. 2179 */ 2180 /* initialize our journal structure */ 2181 2182 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2183 if (!journal) { 2184 mlog(ML_ERROR, "unable to alloc journal\n"); 2185 status = -ENOMEM; 2186 goto bail; 2187 } 2188 osb->journal = journal; 2189 journal->j_osb = osb; 2190 2191 atomic_set(&journal->j_num_trans, 0); 2192 init_rwsem(&journal->j_trans_barrier); 2193 init_waitqueue_head(&journal->j_checkpointed); 2194 spin_lock_init(&journal->j_lock); 2195 journal->j_trans_id = (unsigned long) 1; 2196 INIT_LIST_HEAD(&journal->j_la_cleanups); 2197 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2198 journal->j_state = OCFS2_JOURNAL_FREE; 2199 2200 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2201 osb->dentry_lock_list = NULL; 2202 2203 /* get some pseudo constants for clustersize bits */ 2204 osb->s_clustersize_bits = 2205 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2206 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2207 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 2208 2209 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2210 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2211 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2212 osb->s_clustersize); 2213 status = -EINVAL; 2214 goto bail; 2215 } 2216 2217 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 2218 > (u32)~0UL) { 2219 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 2220 "what jbd can address in 32 bits.\n"); 2221 status = -EINVAL; 2222 goto bail; 2223 } 2224 2225 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2226 sizeof(di->id2.i_super.s_uuid))) { 2227 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2228 status = -ENOMEM; 2229 goto bail; 2230 } 2231 2232 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2233 2234 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2235 osb->vol_label[63] = '\0'; 2236 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2237 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2238 osb->first_cluster_group_blkno = 2239 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2240 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2241 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2242 mlog(0, "vol_label: %s\n", osb->vol_label); 2243 mlog(0, "uuid: %s\n", osb->uuid_str); 2244 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 2245 (unsigned long long)osb->root_blkno, 2246 (unsigned long long)osb->system_dir_blkno); 2247 2248 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2249 if (!osb->osb_dlm_debug) { 2250 status = -ENOMEM; 2251 mlog_errno(status); 2252 goto bail; 2253 } 2254 2255 atomic_set(&osb->vol_state, VOLUME_INIT); 2256 2257 /* load root, system_dir, and all global system inodes */ 2258 status = ocfs2_init_global_system_inodes(osb); 2259 if (status < 0) { 2260 mlog_errno(status); 2261 goto bail; 2262 } 2263 2264 /* 2265 * global bitmap 2266 */ 2267 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2268 OCFS2_INVALID_SLOT); 2269 if (!inode) { 2270 status = -EINVAL; 2271 mlog_errno(status); 2272 goto bail; 2273 } 2274 2275 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2276 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2277 iput(inode); 2278 2279 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2280 osb->s_feature_incompat) * 8; 2281 2282 status = ocfs2_init_slot_info(osb); 2283 if (status < 0) { 2284 mlog_errno(status); 2285 goto bail; 2286 } 2287 2288 bail: 2289 mlog_exit(status); 2290 return status; 2291 } 2292 2293 /* 2294 * will return: -EAGAIN if it is ok to keep searching for superblocks 2295 * -EINVAL if there is a bad superblock 2296 * 0 on success 2297 */ 2298 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2299 struct buffer_head *bh, 2300 u32 blksz, 2301 struct ocfs2_blockcheck_stats *stats) 2302 { 2303 int status = -EAGAIN; 2304 2305 mlog_entry_void(); 2306 2307 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2308 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2309 /* We have to do a raw check of the feature here */ 2310 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2311 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2312 status = ocfs2_block_check_validate(bh->b_data, 2313 bh->b_size, 2314 &di->i_check, 2315 stats); 2316 if (status) 2317 goto out; 2318 } 2319 status = -EINVAL; 2320 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2321 mlog(ML_ERROR, "found superblock with incorrect block " 2322 "size: found %u, should be %u\n", 2323 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2324 blksz); 2325 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2326 OCFS2_MAJOR_REV_LEVEL || 2327 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2328 OCFS2_MINOR_REV_LEVEL) { 2329 mlog(ML_ERROR, "found superblock with bad version: " 2330 "found %u.%u, should be %u.%u\n", 2331 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2332 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2333 OCFS2_MAJOR_REV_LEVEL, 2334 OCFS2_MINOR_REV_LEVEL); 2335 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2336 mlog(ML_ERROR, "bad block number on superblock: " 2337 "found %llu, should be %llu\n", 2338 (unsigned long long)le64_to_cpu(di->i_blkno), 2339 (unsigned long long)bh->b_blocknr); 2340 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2341 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2342 mlog(ML_ERROR, "bad cluster size found: %u\n", 2343 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2344 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2345 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2346 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2347 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2348 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2349 mlog(ML_ERROR, 2350 "Superblock slots found greater than file system " 2351 "maximum: found %u, max %u\n", 2352 le16_to_cpu(di->id2.i_super.s_max_slots), 2353 OCFS2_MAX_SLOTS); 2354 } else { 2355 /* found it! */ 2356 status = 0; 2357 } 2358 } 2359 2360 out: 2361 mlog_exit(status); 2362 return status; 2363 } 2364 2365 static int ocfs2_check_volume(struct ocfs2_super *osb) 2366 { 2367 int status; 2368 int dirty; 2369 int local; 2370 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2371 * recover 2372 * ourselves. */ 2373 2374 mlog_entry_void(); 2375 2376 /* Init our journal object. */ 2377 status = ocfs2_journal_init(osb->journal, &dirty); 2378 if (status < 0) { 2379 mlog(ML_ERROR, "Could not initialize journal!\n"); 2380 goto finally; 2381 } 2382 2383 /* If the journal was unmounted cleanly then we don't want to 2384 * recover anything. Otherwise, journal_load will do that 2385 * dirty work for us :) */ 2386 if (!dirty) { 2387 status = ocfs2_journal_wipe(osb->journal, 0); 2388 if (status < 0) { 2389 mlog_errno(status); 2390 goto finally; 2391 } 2392 } else { 2393 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2394 "recovering volume.\n"); 2395 } 2396 2397 local = ocfs2_mount_local(osb); 2398 2399 /* will play back anything left in the journal. */ 2400 status = ocfs2_journal_load(osb->journal, local, dirty); 2401 if (status < 0) { 2402 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2403 goto finally; 2404 } 2405 2406 if (dirty) { 2407 /* recover my local alloc if we didn't unmount cleanly. */ 2408 status = ocfs2_begin_local_alloc_recovery(osb, 2409 osb->slot_num, 2410 &local_alloc); 2411 if (status < 0) { 2412 mlog_errno(status); 2413 goto finally; 2414 } 2415 /* we complete the recovery process after we've marked 2416 * ourselves as mounted. */ 2417 } 2418 2419 mlog(0, "Journal loaded.\n"); 2420 2421 status = ocfs2_load_local_alloc(osb); 2422 if (status < 0) { 2423 mlog_errno(status); 2424 goto finally; 2425 } 2426 2427 if (dirty) { 2428 /* Recovery will be completed after we've mounted the 2429 * rest of the volume. */ 2430 osb->dirty = 1; 2431 osb->local_alloc_copy = local_alloc; 2432 local_alloc = NULL; 2433 } 2434 2435 /* go through each journal, trylock it and if you get the 2436 * lock, and it's marked as dirty, set the bit in the recover 2437 * map and launch a recovery thread for it. */ 2438 status = ocfs2_mark_dead_nodes(osb); 2439 if (status < 0) { 2440 mlog_errno(status); 2441 goto finally; 2442 } 2443 2444 status = ocfs2_compute_replay_slots(osb); 2445 if (status < 0) 2446 mlog_errno(status); 2447 2448 finally: 2449 if (local_alloc) 2450 kfree(local_alloc); 2451 2452 mlog_exit(status); 2453 return status; 2454 } 2455 2456 /* 2457 * The routine gets called from dismount or close whenever a dismount on 2458 * volume is requested and the osb open count becomes 1. 2459 * It will remove the osb from the global list and also free up all the 2460 * initialized resources and fileobject. 2461 */ 2462 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2463 { 2464 mlog_entry_void(); 2465 2466 /* This function assumes that the caller has the main osb resource */ 2467 2468 ocfs2_free_slot_info(osb); 2469 2470 kfree(osb->osb_orphan_wipes); 2471 kfree(osb->slot_recovery_generations); 2472 /* FIXME 2473 * This belongs in journal shutdown, but because we have to 2474 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2475 * we free it here. 2476 */ 2477 kfree(osb->journal); 2478 if (osb->local_alloc_copy) 2479 kfree(osb->local_alloc_copy); 2480 kfree(osb->uuid_str); 2481 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2482 memset(osb, 0, sizeof(struct ocfs2_super)); 2483 2484 mlog_exit_void(); 2485 } 2486 2487 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2488 * panic(). We do not support continue-on-error operation. */ 2489 static void ocfs2_handle_error(struct super_block *sb) 2490 { 2491 struct ocfs2_super *osb = OCFS2_SB(sb); 2492 2493 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2494 panic("OCFS2: (device %s): panic forced after error\n", 2495 sb->s_id); 2496 2497 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2498 2499 if (sb->s_flags & MS_RDONLY && 2500 (ocfs2_is_soft_readonly(osb) || 2501 ocfs2_is_hard_readonly(osb))) 2502 return; 2503 2504 printk(KERN_CRIT "File system is now read-only due to the potential " 2505 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2506 "system is unmounted.\n"); 2507 sb->s_flags |= MS_RDONLY; 2508 ocfs2_set_ro_flag(osb, 0); 2509 } 2510 2511 static char error_buf[1024]; 2512 2513 void __ocfs2_error(struct super_block *sb, 2514 const char *function, 2515 const char *fmt, ...) 2516 { 2517 va_list args; 2518 2519 va_start(args, fmt); 2520 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2521 va_end(args); 2522 2523 /* Not using mlog here because we want to show the actual 2524 * function the error came from. */ 2525 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2526 sb->s_id, function, error_buf); 2527 2528 ocfs2_handle_error(sb); 2529 } 2530 2531 /* Handle critical errors. This is intentionally more drastic than 2532 * ocfs2_handle_error, so we only use for things like journal errors, 2533 * etc. */ 2534 void __ocfs2_abort(struct super_block* sb, 2535 const char *function, 2536 const char *fmt, ...) 2537 { 2538 va_list args; 2539 2540 va_start(args, fmt); 2541 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2542 va_end(args); 2543 2544 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2545 sb->s_id, function, error_buf); 2546 2547 /* We don't have the cluster support yet to go straight to 2548 * hard readonly in here. Until then, we want to keep 2549 * ocfs2_abort() so that we can at least mark critical 2550 * errors. 2551 * 2552 * TODO: This should abort the journal and alert other nodes 2553 * that our slot needs recovery. */ 2554 2555 /* Force a panic(). This stinks, but it's better than letting 2556 * things continue without having a proper hard readonly 2557 * here. */ 2558 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2559 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2560 ocfs2_handle_error(sb); 2561 } 2562 2563 /* 2564 * Void signal blockers, because in-kernel sigprocmask() only fails 2565 * when SIG_* is wrong. 2566 */ 2567 void ocfs2_block_signals(sigset_t *oldset) 2568 { 2569 int rc; 2570 sigset_t blocked; 2571 2572 sigfillset(&blocked); 2573 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2574 BUG_ON(rc); 2575 } 2576 2577 void ocfs2_unblock_signals(sigset_t *oldset) 2578 { 2579 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2580 BUG_ON(rc); 2581 } 2582 2583 module_init(ocfs2_init); 2584 module_exit(ocfs2_exit); 2585