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 .clear_inode = ocfs2_clear_inode, 149 .delete_inode = ocfs2_delete_inode, 150 .sync_fs = ocfs2_sync_fs, 151 .put_super = ocfs2_put_super, 152 .remount_fs = ocfs2_remount, 153 .show_options = ocfs2_show_options, 154 .quota_read = ocfs2_quota_read, 155 .quota_write = ocfs2_quota_write, 156 }; 157 158 enum { 159 Opt_barrier, 160 Opt_err_panic, 161 Opt_err_ro, 162 Opt_intr, 163 Opt_nointr, 164 Opt_hb_none, 165 Opt_hb_local, 166 Opt_data_ordered, 167 Opt_data_writeback, 168 Opt_atime_quantum, 169 Opt_slot, 170 Opt_commit, 171 Opt_localalloc, 172 Opt_localflocks, 173 Opt_stack, 174 Opt_user_xattr, 175 Opt_nouser_xattr, 176 Opt_inode64, 177 Opt_acl, 178 Opt_noacl, 179 Opt_usrquota, 180 Opt_grpquota, 181 Opt_resv_level, 182 Opt_dir_resv_level, 183 Opt_err, 184 }; 185 186 static const match_table_t tokens = { 187 {Opt_barrier, "barrier=%u"}, 188 {Opt_err_panic, "errors=panic"}, 189 {Opt_err_ro, "errors=remount-ro"}, 190 {Opt_intr, "intr"}, 191 {Opt_nointr, "nointr"}, 192 {Opt_hb_none, OCFS2_HB_NONE}, 193 {Opt_hb_local, OCFS2_HB_LOCAL}, 194 {Opt_data_ordered, "data=ordered"}, 195 {Opt_data_writeback, "data=writeback"}, 196 {Opt_atime_quantum, "atime_quantum=%u"}, 197 {Opt_slot, "preferred_slot=%u"}, 198 {Opt_commit, "commit=%u"}, 199 {Opt_localalloc, "localalloc=%d"}, 200 {Opt_localflocks, "localflocks"}, 201 {Opt_stack, "cluster_stack=%s"}, 202 {Opt_user_xattr, "user_xattr"}, 203 {Opt_nouser_xattr, "nouser_xattr"}, 204 {Opt_inode64, "inode64"}, 205 {Opt_acl, "acl"}, 206 {Opt_noacl, "noacl"}, 207 {Opt_usrquota, "usrquota"}, 208 {Opt_grpquota, "grpquota"}, 209 {Opt_resv_level, "resv_level=%u"}, 210 {Opt_dir_resv_level, "dir_resv_level=%u"}, 211 {Opt_err, NULL} 212 }; 213 214 #ifdef CONFIG_DEBUG_FS 215 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 216 { 217 struct ocfs2_cluster_connection *cconn = osb->cconn; 218 struct ocfs2_recovery_map *rm = osb->recovery_map; 219 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 220 int i, out = 0; 221 222 out += snprintf(buf + out, len - out, 223 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 224 "Device", osb->dev_str, osb->uuid_str, 225 osb->fs_generation, osb->vol_label); 226 227 out += snprintf(buf + out, len - out, 228 "%10s => State: %d Flags: 0x%lX\n", "Volume", 229 atomic_read(&osb->vol_state), osb->osb_flags); 230 231 out += snprintf(buf + out, len - out, 232 "%10s => Block: %lu Cluster: %d\n", "Sizes", 233 osb->sb->s_blocksize, osb->s_clustersize); 234 235 out += snprintf(buf + out, len - out, 236 "%10s => Compat: 0x%X Incompat: 0x%X " 237 "ROcompat: 0x%X\n", 238 "Features", osb->s_feature_compat, 239 osb->s_feature_incompat, osb->s_feature_ro_compat); 240 241 out += snprintf(buf + out, len - out, 242 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 243 osb->s_mount_opt, osb->s_atime_quantum); 244 245 if (cconn) { 246 out += snprintf(buf + out, len - out, 247 "%10s => Stack: %s Name: %*s " 248 "Version: %d.%d\n", "Cluster", 249 (*osb->osb_cluster_stack == '\0' ? 250 "o2cb" : osb->osb_cluster_stack), 251 cconn->cc_namelen, cconn->cc_name, 252 cconn->cc_version.pv_major, 253 cconn->cc_version.pv_minor); 254 } 255 256 spin_lock(&osb->dc_task_lock); 257 out += snprintf(buf + out, len - out, 258 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 259 "WorkSeq: %lu\n", "DownCnvt", 260 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 261 osb->blocked_lock_count, osb->dc_wake_sequence, 262 osb->dc_work_sequence); 263 spin_unlock(&osb->dc_task_lock); 264 265 spin_lock(&osb->osb_lock); 266 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 267 "Recovery", 268 (osb->recovery_thread_task ? 269 task_pid_nr(osb->recovery_thread_task) : -1)); 270 if (rm->rm_used == 0) 271 out += snprintf(buf + out, len - out, " None\n"); 272 else { 273 for (i = 0; i < rm->rm_used; i++) 274 out += snprintf(buf + out, len - out, " %d", 275 rm->rm_entries[i]); 276 out += snprintf(buf + out, len - out, "\n"); 277 } 278 spin_unlock(&osb->osb_lock); 279 280 out += snprintf(buf + out, len - out, 281 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit", 282 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 283 osb->osb_commit_interval, 284 atomic_read(&osb->needs_checkpoint)); 285 286 out += snprintf(buf + out, len - out, 287 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 288 "Journal", osb->journal->j_state, 289 osb->journal->j_trans_id, 290 atomic_read(&osb->journal->j_num_trans)); 291 292 out += snprintf(buf + out, len - out, 293 "%10s => GlobalAllocs: %d LocalAllocs: %d " 294 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 295 "Stats", 296 atomic_read(&osb->alloc_stats.bitmap_data), 297 atomic_read(&osb->alloc_stats.local_data), 298 atomic_read(&osb->alloc_stats.bg_allocs), 299 atomic_read(&osb->alloc_stats.moves), 300 atomic_read(&osb->alloc_stats.bg_extends)); 301 302 out += snprintf(buf + out, len - out, 303 "%10s => State: %u Descriptor: %llu Size: %u bits " 304 "Default: %u bits\n", 305 "LocalAlloc", osb->local_alloc_state, 306 (unsigned long long)osb->la_last_gd, 307 osb->local_alloc_bits, osb->local_alloc_default_bits); 308 309 spin_lock(&osb->osb_lock); 310 out += snprintf(buf + out, len - out, 311 "%10s => InodeSlot: %d StolenInodes: %d, " 312 "MetaSlot: %d StolenMeta: %d\n", "Steal", 313 osb->s_inode_steal_slot, 314 atomic_read(&osb->s_num_inodes_stolen), 315 osb->s_meta_steal_slot, 316 atomic_read(&osb->s_num_meta_stolen)); 317 spin_unlock(&osb->osb_lock); 318 319 out += snprintf(buf + out, len - out, "OrphanScan => "); 320 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 321 os->os_count, os->os_seqno); 322 out += snprintf(buf + out, len - out, " Last Scan: "); 323 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 324 out += snprintf(buf + out, len - out, "Disabled\n"); 325 else 326 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 327 (get_seconds() - os->os_scantime.tv_sec)); 328 329 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 330 "Slots", "Num", "RecoGen"); 331 for (i = 0; i < osb->max_slots; ++i) { 332 out += snprintf(buf + out, len - out, 333 "%10s %c %3d %10d\n", 334 " ", 335 (i == osb->slot_num ? '*' : ' '), 336 i, osb->slot_recovery_generations[i]); 337 } 338 339 return out; 340 } 341 342 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 343 { 344 struct ocfs2_super *osb = inode->i_private; 345 char *buf = NULL; 346 347 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 348 if (!buf) 349 goto bail; 350 351 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 352 353 file->private_data = buf; 354 355 return 0; 356 bail: 357 return -ENOMEM; 358 } 359 360 static int ocfs2_debug_release(struct inode *inode, struct file *file) 361 { 362 kfree(file->private_data); 363 return 0; 364 } 365 366 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 367 size_t nbytes, loff_t *ppos) 368 { 369 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 370 i_size_read(file->f_mapping->host)); 371 } 372 #else 373 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 374 { 375 return 0; 376 } 377 static int ocfs2_debug_release(struct inode *inode, struct file *file) 378 { 379 return 0; 380 } 381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 382 size_t nbytes, loff_t *ppos) 383 { 384 return 0; 385 } 386 #endif /* CONFIG_DEBUG_FS */ 387 388 static const struct file_operations ocfs2_osb_debug_fops = { 389 .open = ocfs2_osb_debug_open, 390 .release = ocfs2_debug_release, 391 .read = ocfs2_debug_read, 392 .llseek = generic_file_llseek, 393 }; 394 395 static int ocfs2_sync_fs(struct super_block *sb, int wait) 396 { 397 int status; 398 tid_t target; 399 struct ocfs2_super *osb = OCFS2_SB(sb); 400 401 if (ocfs2_is_hard_readonly(osb)) 402 return -EROFS; 403 404 if (wait) { 405 status = ocfs2_flush_truncate_log(osb); 406 if (status < 0) 407 mlog_errno(status); 408 } else { 409 ocfs2_schedule_truncate_log_flush(osb, 0); 410 } 411 412 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 413 &target)) { 414 if (wait) 415 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 416 target); 417 } 418 return 0; 419 } 420 421 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 422 { 423 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 424 && (ino == USER_QUOTA_SYSTEM_INODE 425 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 426 return 0; 427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 428 && (ino == GROUP_QUOTA_SYSTEM_INODE 429 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 430 return 0; 431 return 1; 432 } 433 434 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 435 { 436 struct inode *new = NULL; 437 int status = 0; 438 int i; 439 440 mlog_entry_void(); 441 442 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 443 if (IS_ERR(new)) { 444 status = PTR_ERR(new); 445 mlog_errno(status); 446 goto bail; 447 } 448 osb->root_inode = new; 449 450 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 451 if (IS_ERR(new)) { 452 status = PTR_ERR(new); 453 mlog_errno(status); 454 goto bail; 455 } 456 osb->sys_root_inode = new; 457 458 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 459 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 460 if (!ocfs2_need_system_inode(osb, i)) 461 continue; 462 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 463 if (!new) { 464 ocfs2_release_system_inodes(osb); 465 status = -EINVAL; 466 mlog_errno(status); 467 /* FIXME: Should ERROR_RO_FS */ 468 mlog(ML_ERROR, "Unable to load system inode %d, " 469 "possibly corrupt fs?", i); 470 goto bail; 471 } 472 // the array now has one ref, so drop this one 473 iput(new); 474 } 475 476 bail: 477 mlog_exit(status); 478 return status; 479 } 480 481 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 482 { 483 struct inode *new = NULL; 484 int status = 0; 485 int i; 486 487 mlog_entry_void(); 488 489 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 490 i < NUM_SYSTEM_INODES; 491 i++) { 492 if (!ocfs2_need_system_inode(osb, i)) 493 continue; 494 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 495 if (!new) { 496 ocfs2_release_system_inodes(osb); 497 status = -EINVAL; 498 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 499 status, i, osb->slot_num); 500 goto bail; 501 } 502 /* the array now has one ref, so drop this one */ 503 iput(new); 504 } 505 506 bail: 507 mlog_exit(status); 508 return status; 509 } 510 511 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 512 { 513 int i; 514 struct inode *inode; 515 516 mlog_entry_void(); 517 518 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 519 inode = osb->system_inodes[i]; 520 if (inode) { 521 iput(inode); 522 osb->system_inodes[i] = NULL; 523 } 524 } 525 526 inode = osb->sys_root_inode; 527 if (inode) { 528 iput(inode); 529 osb->sys_root_inode = NULL; 530 } 531 532 inode = osb->root_inode; 533 if (inode) { 534 iput(inode); 535 osb->root_inode = NULL; 536 } 537 538 mlog_exit(0); 539 } 540 541 /* We're allocating fs objects, use GFP_NOFS */ 542 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 543 { 544 struct ocfs2_inode_info *oi; 545 546 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 547 if (!oi) 548 return NULL; 549 550 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 551 return &oi->vfs_inode; 552 } 553 554 static void ocfs2_destroy_inode(struct inode *inode) 555 { 556 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 557 } 558 559 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 560 unsigned int cbits) 561 { 562 unsigned int bytes = 1 << cbits; 563 unsigned int trim = bytes; 564 unsigned int bitshift = 32; 565 566 /* 567 * i_size and all block offsets in ocfs2 are always 64 bits 568 * wide. i_clusters is 32 bits, in cluster-sized units. So on 569 * 64 bit platforms, cluster size will be the limiting factor. 570 */ 571 572 #if BITS_PER_LONG == 32 573 # if defined(CONFIG_LBDAF) 574 BUILD_BUG_ON(sizeof(sector_t) != 8); 575 /* 576 * We might be limited by page cache size. 577 */ 578 if (bytes > PAGE_CACHE_SIZE) { 579 bytes = PAGE_CACHE_SIZE; 580 trim = 1; 581 /* 582 * Shift by 31 here so that we don't get larger than 583 * MAX_LFS_FILESIZE 584 */ 585 bitshift = 31; 586 } 587 # else 588 /* 589 * We are limited by the size of sector_t. Use block size, as 590 * that's what we expose to the VFS. 591 */ 592 bytes = 1 << bbits; 593 trim = 1; 594 bitshift = 31; 595 # endif 596 #endif 597 598 /* 599 * Trim by a whole cluster when we can actually approach the 600 * on-disk limits. Otherwise we can overflow i_clusters when 601 * an extent start is at the max offset. 602 */ 603 return (((unsigned long long)bytes) << bitshift) - trim; 604 } 605 606 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 607 { 608 int incompat_features; 609 int ret = 0; 610 struct mount_options parsed_options; 611 struct ocfs2_super *osb = OCFS2_SB(sb); 612 613 lock_kernel(); 614 615 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 616 !ocfs2_check_set_options(sb, &parsed_options)) { 617 ret = -EINVAL; 618 goto out; 619 } 620 621 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 622 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 623 ret = -EINVAL; 624 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 625 goto out; 626 } 627 628 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 629 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 630 ret = -EINVAL; 631 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 632 goto out; 633 } 634 635 /* Probably don't want this on remount; it might 636 * mess with other nodes */ 637 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 638 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 639 ret = -EINVAL; 640 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 641 goto out; 642 } 643 644 /* We're going to/from readonly mode. */ 645 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 646 /* Disable quota accounting before remounting RO */ 647 if (*flags & MS_RDONLY) { 648 ret = ocfs2_susp_quotas(osb, 0); 649 if (ret < 0) 650 goto out; 651 } 652 /* Lock here so the check of HARD_RO and the potential 653 * setting of SOFT_RO is atomic. */ 654 spin_lock(&osb->osb_lock); 655 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 656 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 657 ret = -EROFS; 658 goto unlock_osb; 659 } 660 661 if (*flags & MS_RDONLY) { 662 mlog(0, "Going to ro mode.\n"); 663 sb->s_flags |= MS_RDONLY; 664 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 665 } else { 666 mlog(0, "Making ro filesystem writeable.\n"); 667 668 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 669 mlog(ML_ERROR, "Cannot remount RDWR " 670 "filesystem due to previous errors.\n"); 671 ret = -EROFS; 672 goto unlock_osb; 673 } 674 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 675 if (incompat_features) { 676 mlog(ML_ERROR, "Cannot remount RDWR because " 677 "of unsupported optional features " 678 "(%x).\n", incompat_features); 679 ret = -EINVAL; 680 goto unlock_osb; 681 } 682 sb->s_flags &= ~MS_RDONLY; 683 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 684 } 685 unlock_osb: 686 spin_unlock(&osb->osb_lock); 687 /* Enable quota accounting after remounting RW */ 688 if (!ret && !(*flags & MS_RDONLY)) { 689 if (sb_any_quota_suspended(sb)) 690 ret = ocfs2_susp_quotas(osb, 1); 691 else 692 ret = ocfs2_enable_quotas(osb); 693 if (ret < 0) { 694 /* Return back changes... */ 695 spin_lock(&osb->osb_lock); 696 sb->s_flags |= MS_RDONLY; 697 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 698 spin_unlock(&osb->osb_lock); 699 goto out; 700 } 701 } 702 } 703 704 if (!ret) { 705 /* Only save off the new mount options in case of a successful 706 * remount. */ 707 osb->s_mount_opt = parsed_options.mount_opt; 708 osb->s_atime_quantum = parsed_options.atime_quantum; 709 osb->preferred_slot = parsed_options.slot; 710 if (parsed_options.commit_interval) 711 osb->osb_commit_interval = parsed_options.commit_interval; 712 713 if (!ocfs2_is_hard_readonly(osb)) 714 ocfs2_set_journal_params(osb); 715 716 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 717 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 718 MS_POSIXACL : 0); 719 } 720 out: 721 unlock_kernel(); 722 return ret; 723 } 724 725 static int ocfs2_sb_probe(struct super_block *sb, 726 struct buffer_head **bh, 727 int *sector_size, 728 struct ocfs2_blockcheck_stats *stats) 729 { 730 int status, tmpstat; 731 struct ocfs1_vol_disk_hdr *hdr; 732 struct ocfs2_dinode *di; 733 int blksize; 734 735 *bh = NULL; 736 737 /* may be > 512 */ 738 *sector_size = bdev_logical_block_size(sb->s_bdev); 739 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 740 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 741 *sector_size, OCFS2_MAX_BLOCKSIZE); 742 status = -EINVAL; 743 goto bail; 744 } 745 746 /* Can this really happen? */ 747 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 748 *sector_size = OCFS2_MIN_BLOCKSIZE; 749 750 /* check block zero for old format */ 751 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 752 if (status < 0) { 753 mlog_errno(status); 754 goto bail; 755 } 756 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 757 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 758 mlog(ML_ERROR, "incompatible version: %u.%u\n", 759 hdr->major_version, hdr->minor_version); 760 status = -EINVAL; 761 } 762 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 763 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 764 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 765 hdr->signature); 766 status = -EINVAL; 767 } 768 brelse(*bh); 769 *bh = NULL; 770 if (status < 0) { 771 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 772 "upgraded before mounting with ocfs v2\n"); 773 goto bail; 774 } 775 776 /* 777 * Now check at magic offset for 512, 1024, 2048, 4096 778 * blocksizes. 4096 is the maximum blocksize because it is 779 * the minimum clustersize. 780 */ 781 status = -EINVAL; 782 for (blksize = *sector_size; 783 blksize <= OCFS2_MAX_BLOCKSIZE; 784 blksize <<= 1) { 785 tmpstat = ocfs2_get_sector(sb, bh, 786 OCFS2_SUPER_BLOCK_BLKNO, 787 blksize); 788 if (tmpstat < 0) { 789 status = tmpstat; 790 mlog_errno(status); 791 break; 792 } 793 di = (struct ocfs2_dinode *) (*bh)->b_data; 794 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 795 spin_lock_init(&stats->b_lock); 796 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 797 if (tmpstat < 0) { 798 brelse(*bh); 799 *bh = NULL; 800 } 801 if (tmpstat != -EAGAIN) { 802 status = tmpstat; 803 break; 804 } 805 } 806 807 bail: 808 return status; 809 } 810 811 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 812 { 813 if (ocfs2_mount_local(osb)) { 814 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 815 mlog(ML_ERROR, "Cannot heartbeat on a locally " 816 "mounted device.\n"); 817 return -EINVAL; 818 } 819 } 820 821 if (ocfs2_userspace_stack(osb)) { 822 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 823 mlog(ML_ERROR, "Userspace stack expected, but " 824 "o2cb heartbeat arguments passed to mount\n"); 825 return -EINVAL; 826 } 827 } 828 829 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 830 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 831 !ocfs2_userspace_stack(osb)) { 832 mlog(ML_ERROR, "Heartbeat has to be started to mount " 833 "a read-write clustered device.\n"); 834 return -EINVAL; 835 } 836 } 837 838 return 0; 839 } 840 841 /* 842 * If we're using a userspace stack, mount should have passed 843 * a name that matches the disk. If not, mount should not 844 * have passed a stack. 845 */ 846 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 847 struct mount_options *mopt) 848 { 849 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 850 mlog(ML_ERROR, 851 "cluster stack passed to mount, but this filesystem " 852 "does not support it\n"); 853 return -EINVAL; 854 } 855 856 if (ocfs2_userspace_stack(osb) && 857 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 858 OCFS2_STACK_LABEL_LEN)) { 859 mlog(ML_ERROR, 860 "cluster stack passed to mount (\"%s\") does not " 861 "match the filesystem (\"%s\")\n", 862 mopt->cluster_stack, 863 osb->osb_cluster_stack); 864 return -EINVAL; 865 } 866 867 return 0; 868 } 869 870 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 871 { 872 int type; 873 struct super_block *sb = osb->sb; 874 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 875 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 876 int status = 0; 877 878 for (type = 0; type < MAXQUOTAS; type++) { 879 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 880 continue; 881 if (unsuspend) 882 status = dquot_resume(sb, type); 883 else { 884 struct ocfs2_mem_dqinfo *oinfo; 885 886 /* Cancel periodic syncing before suspending */ 887 oinfo = sb_dqinfo(sb, type)->dqi_priv; 888 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 889 status = dquot_suspend(sb, type); 890 } 891 if (status < 0) 892 break; 893 } 894 if (status < 0) 895 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 896 "remount (error = %d).\n", status); 897 return status; 898 } 899 900 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 901 { 902 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 903 struct super_block *sb = osb->sb; 904 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 905 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 906 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 907 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 908 int status; 909 int type; 910 911 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 912 for (type = 0; type < MAXQUOTAS; type++) { 913 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 914 continue; 915 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 916 osb->slot_num); 917 if (!inode[type]) { 918 status = -ENOENT; 919 goto out_quota_off; 920 } 921 status = dquot_enable(inode[type], type, QFMT_OCFS2, 922 DQUOT_USAGE_ENABLED); 923 if (status < 0) 924 goto out_quota_off; 925 } 926 927 for (type = 0; type < MAXQUOTAS; type++) 928 iput(inode[type]); 929 return 0; 930 out_quota_off: 931 ocfs2_disable_quotas(osb); 932 for (type = 0; type < MAXQUOTAS; type++) 933 iput(inode[type]); 934 mlog_errno(status); 935 return status; 936 } 937 938 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 939 { 940 int type; 941 struct inode *inode; 942 struct super_block *sb = osb->sb; 943 struct ocfs2_mem_dqinfo *oinfo; 944 945 /* We mostly ignore errors in this function because there's not much 946 * we can do when we see them */ 947 for (type = 0; type < MAXQUOTAS; type++) { 948 if (!sb_has_quota_loaded(sb, type)) 949 continue; 950 /* Cancel periodic syncing before we grab dqonoff_mutex */ 951 oinfo = sb_dqinfo(sb, type)->dqi_priv; 952 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 953 inode = igrab(sb->s_dquot.files[type]); 954 /* Turn off quotas. This will remove all dquot structures from 955 * memory and so they will be automatically synced to global 956 * quota files */ 957 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 958 DQUOT_LIMITS_ENABLED); 959 if (!inode) 960 continue; 961 iput(inode); 962 } 963 } 964 965 /* Handle quota on quotactl */ 966 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 967 char *path) 968 { 969 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 970 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 971 972 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 973 return -EINVAL; 974 975 return dquot_enable(sb_dqopt(sb)->files[type], type, 976 format_id, DQUOT_LIMITS_ENABLED); 977 } 978 979 /* Handle quota off quotactl */ 980 static int ocfs2_quota_off(struct super_block *sb, int type) 981 { 982 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 983 } 984 985 static const struct quotactl_ops ocfs2_quotactl_ops = { 986 .quota_on = ocfs2_quota_on, 987 .quota_off = ocfs2_quota_off, 988 .quota_sync = dquot_quota_sync, 989 .get_info = dquot_get_dqinfo, 990 .set_info = dquot_set_dqinfo, 991 .get_dqblk = dquot_get_dqblk, 992 .set_dqblk = dquot_set_dqblk, 993 }; 994 995 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 996 { 997 struct dentry *root; 998 int status, sector_size; 999 struct mount_options parsed_options; 1000 struct inode *inode = NULL; 1001 struct ocfs2_super *osb = NULL; 1002 struct buffer_head *bh = NULL; 1003 char nodestr[8]; 1004 struct ocfs2_blockcheck_stats stats; 1005 1006 mlog_entry("%p, %p, %i", sb, data, silent); 1007 1008 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1009 status = -EINVAL; 1010 goto read_super_error; 1011 } 1012 1013 /* probe for superblock */ 1014 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1015 if (status < 0) { 1016 mlog(ML_ERROR, "superblock probe failed!\n"); 1017 goto read_super_error; 1018 } 1019 1020 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1021 osb = OCFS2_SB(sb); 1022 if (status < 0) { 1023 mlog_errno(status); 1024 goto read_super_error; 1025 } 1026 brelse(bh); 1027 bh = NULL; 1028 1029 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1030 status = -EINVAL; 1031 goto read_super_error; 1032 } 1033 osb->s_mount_opt = parsed_options.mount_opt; 1034 osb->s_atime_quantum = parsed_options.atime_quantum; 1035 osb->preferred_slot = parsed_options.slot; 1036 osb->osb_commit_interval = parsed_options.commit_interval; 1037 1038 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1039 osb->osb_resv_level = parsed_options.resv_level; 1040 osb->osb_dir_resv_level = parsed_options.resv_level; 1041 if (parsed_options.dir_resv_level == -1) 1042 osb->osb_dir_resv_level = parsed_options.resv_level; 1043 else 1044 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1045 1046 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1047 if (status) 1048 goto read_super_error; 1049 1050 sb->s_magic = OCFS2_SUPER_MAGIC; 1051 1052 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1053 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1054 1055 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1056 * heartbeat=none */ 1057 if (bdev_read_only(sb->s_bdev)) { 1058 if (!(sb->s_flags & MS_RDONLY)) { 1059 status = -EACCES; 1060 mlog(ML_ERROR, "Readonly device detected but readonly " 1061 "mount was not specified.\n"); 1062 goto read_super_error; 1063 } 1064 1065 /* You should not be able to start a local heartbeat 1066 * on a readonly device. */ 1067 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1068 status = -EROFS; 1069 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1070 "device.\n"); 1071 goto read_super_error; 1072 } 1073 1074 status = ocfs2_check_journals_nolocks(osb); 1075 if (status < 0) { 1076 if (status == -EROFS) 1077 mlog(ML_ERROR, "Recovery required on readonly " 1078 "file system, but write access is " 1079 "unavailable.\n"); 1080 else 1081 mlog_errno(status); 1082 goto read_super_error; 1083 } 1084 1085 ocfs2_set_ro_flag(osb, 1); 1086 1087 printk(KERN_NOTICE "Readonly device detected. No cluster " 1088 "services will be utilized for this mount. Recovery " 1089 "will be skipped.\n"); 1090 } 1091 1092 if (!ocfs2_is_hard_readonly(osb)) { 1093 if (sb->s_flags & MS_RDONLY) 1094 ocfs2_set_ro_flag(osb, 0); 1095 } 1096 1097 status = ocfs2_verify_heartbeat(osb); 1098 if (status < 0) { 1099 mlog_errno(status); 1100 goto read_super_error; 1101 } 1102 1103 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1104 ocfs2_debugfs_root); 1105 if (!osb->osb_debug_root) { 1106 status = -EINVAL; 1107 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1108 goto read_super_error; 1109 } 1110 1111 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1112 osb->osb_debug_root, 1113 osb, 1114 &ocfs2_osb_debug_fops); 1115 if (!osb->osb_ctxt) { 1116 status = -EINVAL; 1117 mlog_errno(status); 1118 goto read_super_error; 1119 } 1120 1121 if (ocfs2_meta_ecc(osb)) { 1122 status = ocfs2_blockcheck_stats_debugfs_install( 1123 &osb->osb_ecc_stats, 1124 osb->osb_debug_root); 1125 if (status) { 1126 mlog(ML_ERROR, 1127 "Unable to create blockcheck statistics " 1128 "files\n"); 1129 goto read_super_error; 1130 } 1131 } 1132 1133 status = ocfs2_mount_volume(sb); 1134 if (osb->root_inode) 1135 inode = igrab(osb->root_inode); 1136 1137 if (status < 0) 1138 goto read_super_error; 1139 1140 if (!inode) { 1141 status = -EIO; 1142 mlog_errno(status); 1143 goto read_super_error; 1144 } 1145 1146 root = d_alloc_root(inode); 1147 if (!root) { 1148 status = -ENOMEM; 1149 mlog_errno(status); 1150 goto read_super_error; 1151 } 1152 1153 sb->s_root = root; 1154 1155 ocfs2_complete_mount_recovery(osb); 1156 1157 if (ocfs2_mount_local(osb)) 1158 snprintf(nodestr, sizeof(nodestr), "local"); 1159 else 1160 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1161 1162 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1163 "with %s data mode.\n", 1164 osb->dev_str, nodestr, osb->slot_num, 1165 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1166 "ordered"); 1167 1168 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1169 wake_up(&osb->osb_mount_event); 1170 1171 /* Now we can initialize quotas because we can afford to wait 1172 * for cluster locks recovery now. That also means that truncation 1173 * log recovery can happen but that waits for proper quota setup */ 1174 if (!(sb->s_flags & MS_RDONLY)) { 1175 status = ocfs2_enable_quotas(osb); 1176 if (status < 0) { 1177 /* We have to err-out specially here because 1178 * s_root is already set */ 1179 mlog_errno(status); 1180 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1181 wake_up(&osb->osb_mount_event); 1182 mlog_exit(status); 1183 return status; 1184 } 1185 } 1186 1187 ocfs2_complete_quota_recovery(osb); 1188 1189 /* Now we wake up again for processes waiting for quotas */ 1190 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1191 wake_up(&osb->osb_mount_event); 1192 1193 /* Start this when the mount is almost sure of being successful */ 1194 ocfs2_orphan_scan_start(osb); 1195 1196 mlog_exit(status); 1197 return status; 1198 1199 read_super_error: 1200 brelse(bh); 1201 1202 if (inode) 1203 iput(inode); 1204 1205 if (osb) { 1206 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1207 wake_up(&osb->osb_mount_event); 1208 ocfs2_dismount_volume(sb, 1); 1209 } 1210 1211 mlog_exit(status); 1212 return status; 1213 } 1214 1215 static int ocfs2_get_sb(struct file_system_type *fs_type, 1216 int flags, 1217 const char *dev_name, 1218 void *data, 1219 struct vfsmount *mnt) 1220 { 1221 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 1222 mnt); 1223 } 1224 1225 static void ocfs2_kill_sb(struct super_block *sb) 1226 { 1227 struct ocfs2_super *osb = OCFS2_SB(sb); 1228 1229 /* Failed mount? */ 1230 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) 1231 goto out; 1232 1233 /* Prevent further queueing of inode drop events */ 1234 spin_lock(&dentry_list_lock); 1235 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); 1236 spin_unlock(&dentry_list_lock); 1237 /* Wait for work to finish and/or remove it */ 1238 cancel_work_sync(&osb->dentry_lock_work); 1239 out: 1240 kill_block_super(sb); 1241 } 1242 1243 static struct file_system_type ocfs2_fs_type = { 1244 .owner = THIS_MODULE, 1245 .name = "ocfs2", 1246 .get_sb = ocfs2_get_sb, /* is this called when we mount 1247 * the fs? */ 1248 .kill_sb = ocfs2_kill_sb, 1249 1250 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1251 .next = NULL 1252 }; 1253 1254 static int ocfs2_check_set_options(struct super_block *sb, 1255 struct mount_options *options) 1256 { 1257 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1258 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1259 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1260 mlog(ML_ERROR, "User quotas were requested, but this " 1261 "filesystem does not have the feature enabled.\n"); 1262 return 0; 1263 } 1264 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1265 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1266 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1267 mlog(ML_ERROR, "Group quotas were requested, but this " 1268 "filesystem does not have the feature enabled.\n"); 1269 return 0; 1270 } 1271 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1272 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1273 mlog(ML_ERROR, "ACL support requested but extended attributes " 1274 "feature is not enabled\n"); 1275 return 0; 1276 } 1277 /* No ACL setting specified? Use XATTR feature... */ 1278 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1279 OCFS2_MOUNT_NO_POSIX_ACL))) { 1280 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1281 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1282 else 1283 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1284 } 1285 return 1; 1286 } 1287 1288 static int ocfs2_parse_options(struct super_block *sb, 1289 char *options, 1290 struct mount_options *mopt, 1291 int is_remount) 1292 { 1293 int status; 1294 char *p; 1295 1296 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1297 options ? options : "(none)"); 1298 1299 mopt->commit_interval = 0; 1300 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1301 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1302 mopt->slot = OCFS2_INVALID_SLOT; 1303 mopt->localalloc_opt = -1; 1304 mopt->cluster_stack[0] = '\0'; 1305 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1306 mopt->dir_resv_level = -1; 1307 1308 if (!options) { 1309 status = 1; 1310 goto bail; 1311 } 1312 1313 while ((p = strsep(&options, ",")) != NULL) { 1314 int token, option; 1315 substring_t args[MAX_OPT_ARGS]; 1316 1317 if (!*p) 1318 continue; 1319 1320 token = match_token(p, tokens, args); 1321 switch (token) { 1322 case Opt_hb_local: 1323 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1324 break; 1325 case Opt_hb_none: 1326 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 1327 break; 1328 case Opt_barrier: 1329 if (match_int(&args[0], &option)) { 1330 status = 0; 1331 goto bail; 1332 } 1333 if (option) 1334 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1335 else 1336 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1337 break; 1338 case Opt_intr: 1339 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1340 break; 1341 case Opt_nointr: 1342 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1343 break; 1344 case Opt_err_panic: 1345 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1346 break; 1347 case Opt_err_ro: 1348 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1349 break; 1350 case Opt_data_ordered: 1351 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1352 break; 1353 case Opt_data_writeback: 1354 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1355 break; 1356 case Opt_user_xattr: 1357 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1358 break; 1359 case Opt_nouser_xattr: 1360 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1361 break; 1362 case Opt_atime_quantum: 1363 if (match_int(&args[0], &option)) { 1364 status = 0; 1365 goto bail; 1366 } 1367 if (option >= 0) 1368 mopt->atime_quantum = option; 1369 break; 1370 case Opt_slot: 1371 option = 0; 1372 if (match_int(&args[0], &option)) { 1373 status = 0; 1374 goto bail; 1375 } 1376 if (option) 1377 mopt->slot = (s16)option; 1378 break; 1379 case Opt_commit: 1380 option = 0; 1381 if (match_int(&args[0], &option)) { 1382 status = 0; 1383 goto bail; 1384 } 1385 if (option < 0) 1386 return 0; 1387 if (option == 0) 1388 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1389 mopt->commit_interval = HZ * option; 1390 break; 1391 case Opt_localalloc: 1392 option = 0; 1393 if (match_int(&args[0], &option)) { 1394 status = 0; 1395 goto bail; 1396 } 1397 if (option >= 0) 1398 mopt->localalloc_opt = option; 1399 break; 1400 case Opt_localflocks: 1401 /* 1402 * Changing this during remount could race 1403 * flock() requests, or "unbalance" existing 1404 * ones (e.g., a lock is taken in one mode but 1405 * dropped in the other). If users care enough 1406 * to flip locking modes during remount, we 1407 * could add a "local" flag to individual 1408 * flock structures for proper tracking of 1409 * state. 1410 */ 1411 if (!is_remount) 1412 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1413 break; 1414 case Opt_stack: 1415 /* Check both that the option we were passed 1416 * is of the right length and that it is a proper 1417 * string of the right length. 1418 */ 1419 if (((args[0].to - args[0].from) != 1420 OCFS2_STACK_LABEL_LEN) || 1421 (strnlen(args[0].from, 1422 OCFS2_STACK_LABEL_LEN) != 1423 OCFS2_STACK_LABEL_LEN)) { 1424 mlog(ML_ERROR, 1425 "Invalid cluster_stack option\n"); 1426 status = 0; 1427 goto bail; 1428 } 1429 memcpy(mopt->cluster_stack, args[0].from, 1430 OCFS2_STACK_LABEL_LEN); 1431 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1432 break; 1433 case Opt_inode64: 1434 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1435 break; 1436 case Opt_usrquota: 1437 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1438 break; 1439 case Opt_grpquota: 1440 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1441 break; 1442 case Opt_acl: 1443 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1444 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1445 break; 1446 case Opt_noacl: 1447 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1448 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1449 break; 1450 case Opt_resv_level: 1451 if (is_remount) 1452 break; 1453 if (match_int(&args[0], &option)) { 1454 status = 0; 1455 goto bail; 1456 } 1457 if (option >= OCFS2_MIN_RESV_LEVEL && 1458 option < OCFS2_MAX_RESV_LEVEL) 1459 mopt->resv_level = option; 1460 break; 1461 case Opt_dir_resv_level: 1462 if (is_remount) 1463 break; 1464 if (match_int(&args[0], &option)) { 1465 status = 0; 1466 goto bail; 1467 } 1468 if (option >= OCFS2_MIN_RESV_LEVEL && 1469 option < OCFS2_MAX_RESV_LEVEL) 1470 mopt->dir_resv_level = option; 1471 break; 1472 default: 1473 mlog(ML_ERROR, 1474 "Unrecognized mount option \"%s\" " 1475 "or missing value\n", p); 1476 status = 0; 1477 goto bail; 1478 } 1479 } 1480 1481 status = 1; 1482 1483 bail: 1484 mlog_exit(status); 1485 return status; 1486 } 1487 1488 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1489 { 1490 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1491 unsigned long opts = osb->s_mount_opt; 1492 unsigned int local_alloc_megs; 1493 1494 if (opts & OCFS2_MOUNT_HB_LOCAL) 1495 seq_printf(s, ",_netdev,heartbeat=local"); 1496 else 1497 seq_printf(s, ",heartbeat=none"); 1498 1499 if (opts & OCFS2_MOUNT_NOINTR) 1500 seq_printf(s, ",nointr"); 1501 1502 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1503 seq_printf(s, ",data=writeback"); 1504 else 1505 seq_printf(s, ",data=ordered"); 1506 1507 if (opts & OCFS2_MOUNT_BARRIER) 1508 seq_printf(s, ",barrier=1"); 1509 1510 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1511 seq_printf(s, ",errors=panic"); 1512 else 1513 seq_printf(s, ",errors=remount-ro"); 1514 1515 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1516 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1517 1518 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1519 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1520 1521 if (osb->osb_commit_interval) 1522 seq_printf(s, ",commit=%u", 1523 (unsigned) (osb->osb_commit_interval / HZ)); 1524 1525 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1526 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1527 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1528 1529 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1530 seq_printf(s, ",localflocks,"); 1531 1532 if (osb->osb_cluster_stack[0]) 1533 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1534 osb->osb_cluster_stack); 1535 if (opts & OCFS2_MOUNT_USRQUOTA) 1536 seq_printf(s, ",usrquota"); 1537 if (opts & OCFS2_MOUNT_GRPQUOTA) 1538 seq_printf(s, ",grpquota"); 1539 1540 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1541 seq_printf(s, ",nouser_xattr"); 1542 else 1543 seq_printf(s, ",user_xattr"); 1544 1545 if (opts & OCFS2_MOUNT_INODE64) 1546 seq_printf(s, ",inode64"); 1547 1548 if (opts & OCFS2_MOUNT_POSIX_ACL) 1549 seq_printf(s, ",acl"); 1550 else 1551 seq_printf(s, ",noacl"); 1552 1553 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1554 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1555 1556 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1557 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1558 1559 return 0; 1560 } 1561 1562 static int __init ocfs2_init(void) 1563 { 1564 int status; 1565 1566 mlog_entry_void(); 1567 1568 ocfs2_print_version(); 1569 1570 status = init_ocfs2_uptodate_cache(); 1571 if (status < 0) { 1572 mlog_errno(status); 1573 goto leave; 1574 } 1575 1576 status = ocfs2_initialize_mem_caches(); 1577 if (status < 0) { 1578 mlog_errno(status); 1579 goto leave; 1580 } 1581 1582 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1583 if (!ocfs2_wq) { 1584 status = -ENOMEM; 1585 goto leave; 1586 } 1587 1588 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1589 if (!ocfs2_debugfs_root) { 1590 status = -EFAULT; 1591 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1592 } 1593 1594 status = ocfs2_quota_setup(); 1595 if (status) 1596 goto leave; 1597 1598 ocfs2_set_locking_protocol(); 1599 1600 status = register_quota_format(&ocfs2_quota_format); 1601 leave: 1602 if (status < 0) { 1603 ocfs2_quota_shutdown(); 1604 ocfs2_free_mem_caches(); 1605 exit_ocfs2_uptodate_cache(); 1606 } 1607 1608 mlog_exit(status); 1609 1610 if (status >= 0) { 1611 return register_filesystem(&ocfs2_fs_type); 1612 } else 1613 return -1; 1614 } 1615 1616 static void __exit ocfs2_exit(void) 1617 { 1618 mlog_entry_void(); 1619 1620 ocfs2_quota_shutdown(); 1621 1622 if (ocfs2_wq) { 1623 flush_workqueue(ocfs2_wq); 1624 destroy_workqueue(ocfs2_wq); 1625 } 1626 1627 unregister_quota_format(&ocfs2_quota_format); 1628 1629 debugfs_remove(ocfs2_debugfs_root); 1630 1631 ocfs2_free_mem_caches(); 1632 1633 unregister_filesystem(&ocfs2_fs_type); 1634 1635 exit_ocfs2_uptodate_cache(); 1636 1637 mlog_exit_void(); 1638 } 1639 1640 static void ocfs2_put_super(struct super_block *sb) 1641 { 1642 mlog_entry("(0x%p)\n", sb); 1643 1644 lock_kernel(); 1645 1646 ocfs2_sync_blockdev(sb); 1647 ocfs2_dismount_volume(sb, 0); 1648 1649 unlock_kernel(); 1650 1651 mlog_exit_void(); 1652 } 1653 1654 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1655 { 1656 struct ocfs2_super *osb; 1657 u32 numbits, freebits; 1658 int status; 1659 struct ocfs2_dinode *bm_lock; 1660 struct buffer_head *bh = NULL; 1661 struct inode *inode = NULL; 1662 1663 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1664 1665 osb = OCFS2_SB(dentry->d_sb); 1666 1667 inode = ocfs2_get_system_file_inode(osb, 1668 GLOBAL_BITMAP_SYSTEM_INODE, 1669 OCFS2_INVALID_SLOT); 1670 if (!inode) { 1671 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1672 status = -EIO; 1673 goto bail; 1674 } 1675 1676 status = ocfs2_inode_lock(inode, &bh, 0); 1677 if (status < 0) { 1678 mlog_errno(status); 1679 goto bail; 1680 } 1681 1682 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1683 1684 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1685 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1686 1687 buf->f_type = OCFS2_SUPER_MAGIC; 1688 buf->f_bsize = dentry->d_sb->s_blocksize; 1689 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1690 buf->f_blocks = ((sector_t) numbits) * 1691 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1692 buf->f_bfree = ((sector_t) freebits) * 1693 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1694 buf->f_bavail = buf->f_bfree; 1695 buf->f_files = numbits; 1696 buf->f_ffree = freebits; 1697 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1698 & 0xFFFFFFFFUL; 1699 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1700 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1701 1702 brelse(bh); 1703 1704 ocfs2_inode_unlock(inode, 0); 1705 status = 0; 1706 bail: 1707 if (inode) 1708 iput(inode); 1709 1710 mlog_exit(status); 1711 1712 return status; 1713 } 1714 1715 static void ocfs2_inode_init_once(void *data) 1716 { 1717 struct ocfs2_inode_info *oi = data; 1718 1719 oi->ip_flags = 0; 1720 oi->ip_open_count = 0; 1721 spin_lock_init(&oi->ip_lock); 1722 ocfs2_extent_map_init(&oi->vfs_inode); 1723 INIT_LIST_HEAD(&oi->ip_io_markers); 1724 oi->ip_dir_start_lookup = 0; 1725 1726 init_rwsem(&oi->ip_alloc_sem); 1727 init_rwsem(&oi->ip_xattr_sem); 1728 mutex_init(&oi->ip_io_mutex); 1729 1730 oi->ip_blkno = 0ULL; 1731 oi->ip_clusters = 0; 1732 1733 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1734 1735 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1736 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1737 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1738 1739 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1740 &ocfs2_inode_caching_ops); 1741 1742 inode_init_once(&oi->vfs_inode); 1743 } 1744 1745 static int ocfs2_initialize_mem_caches(void) 1746 { 1747 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1748 sizeof(struct ocfs2_inode_info), 1749 0, 1750 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1751 SLAB_MEM_SPREAD), 1752 ocfs2_inode_init_once); 1753 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1754 sizeof(struct ocfs2_dquot), 1755 0, 1756 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1757 SLAB_MEM_SPREAD), 1758 NULL); 1759 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1760 sizeof(struct ocfs2_quota_chunk), 1761 0, 1762 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1763 NULL); 1764 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1765 !ocfs2_qf_chunk_cachep) { 1766 if (ocfs2_inode_cachep) 1767 kmem_cache_destroy(ocfs2_inode_cachep); 1768 if (ocfs2_dquot_cachep) 1769 kmem_cache_destroy(ocfs2_dquot_cachep); 1770 if (ocfs2_qf_chunk_cachep) 1771 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1772 return -ENOMEM; 1773 } 1774 1775 return 0; 1776 } 1777 1778 static void ocfs2_free_mem_caches(void) 1779 { 1780 if (ocfs2_inode_cachep) 1781 kmem_cache_destroy(ocfs2_inode_cachep); 1782 ocfs2_inode_cachep = NULL; 1783 1784 if (ocfs2_dquot_cachep) 1785 kmem_cache_destroy(ocfs2_dquot_cachep); 1786 ocfs2_dquot_cachep = NULL; 1787 1788 if (ocfs2_qf_chunk_cachep) 1789 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1790 ocfs2_qf_chunk_cachep = NULL; 1791 } 1792 1793 static int ocfs2_get_sector(struct super_block *sb, 1794 struct buffer_head **bh, 1795 int block, 1796 int sect_size) 1797 { 1798 if (!sb_set_blocksize(sb, sect_size)) { 1799 mlog(ML_ERROR, "unable to set blocksize\n"); 1800 return -EIO; 1801 } 1802 1803 *bh = sb_getblk(sb, block); 1804 if (!*bh) { 1805 mlog_errno(-EIO); 1806 return -EIO; 1807 } 1808 lock_buffer(*bh); 1809 if (!buffer_dirty(*bh)) 1810 clear_buffer_uptodate(*bh); 1811 unlock_buffer(*bh); 1812 ll_rw_block(READ, 1, bh); 1813 wait_on_buffer(*bh); 1814 if (!buffer_uptodate(*bh)) { 1815 mlog_errno(-EIO); 1816 brelse(*bh); 1817 *bh = NULL; 1818 return -EIO; 1819 } 1820 1821 return 0; 1822 } 1823 1824 static int ocfs2_mount_volume(struct super_block *sb) 1825 { 1826 int status = 0; 1827 int unlock_super = 0; 1828 struct ocfs2_super *osb = OCFS2_SB(sb); 1829 1830 mlog_entry_void(); 1831 1832 if (ocfs2_is_hard_readonly(osb)) 1833 goto leave; 1834 1835 status = ocfs2_dlm_init(osb); 1836 if (status < 0) { 1837 mlog_errno(status); 1838 goto leave; 1839 } 1840 1841 status = ocfs2_super_lock(osb, 1); 1842 if (status < 0) { 1843 mlog_errno(status); 1844 goto leave; 1845 } 1846 unlock_super = 1; 1847 1848 /* This will load up the node map and add ourselves to it. */ 1849 status = ocfs2_find_slot(osb); 1850 if (status < 0) { 1851 mlog_errno(status); 1852 goto leave; 1853 } 1854 1855 /* load all node-local system inodes */ 1856 status = ocfs2_init_local_system_inodes(osb); 1857 if (status < 0) { 1858 mlog_errno(status); 1859 goto leave; 1860 } 1861 1862 status = ocfs2_check_volume(osb); 1863 if (status < 0) { 1864 mlog_errno(status); 1865 goto leave; 1866 } 1867 1868 status = ocfs2_truncate_log_init(osb); 1869 if (status < 0) 1870 mlog_errno(status); 1871 1872 leave: 1873 if (unlock_super) 1874 ocfs2_super_unlock(osb, 1); 1875 1876 mlog_exit(status); 1877 return status; 1878 } 1879 1880 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1881 { 1882 int tmp, hangup_needed = 0; 1883 struct ocfs2_super *osb = NULL; 1884 char nodestr[8]; 1885 1886 mlog_entry("(0x%p)\n", sb); 1887 1888 BUG_ON(!sb); 1889 osb = OCFS2_SB(sb); 1890 BUG_ON(!osb); 1891 1892 debugfs_remove(osb->osb_ctxt); 1893 1894 /* 1895 * Flush inode dropping work queue so that deletes are 1896 * performed while the filesystem is still working 1897 */ 1898 ocfs2_drop_all_dl_inodes(osb); 1899 1900 /* Orphan scan should be stopped as early as possible */ 1901 ocfs2_orphan_scan_stop(osb); 1902 1903 ocfs2_disable_quotas(osb); 1904 1905 ocfs2_shutdown_local_alloc(osb); 1906 1907 ocfs2_truncate_log_shutdown(osb); 1908 1909 /* This will disable recovery and flush any recovery work. */ 1910 ocfs2_recovery_exit(osb); 1911 1912 ocfs2_journal_shutdown(osb); 1913 1914 ocfs2_sync_blockdev(sb); 1915 1916 ocfs2_purge_refcount_trees(osb); 1917 1918 /* No cluster connection means we've failed during mount, so skip 1919 * all the steps which depended on that to complete. */ 1920 if (osb->cconn) { 1921 tmp = ocfs2_super_lock(osb, 1); 1922 if (tmp < 0) { 1923 mlog_errno(tmp); 1924 return; 1925 } 1926 } 1927 1928 if (osb->slot_num != OCFS2_INVALID_SLOT) 1929 ocfs2_put_slot(osb); 1930 1931 if (osb->cconn) 1932 ocfs2_super_unlock(osb, 1); 1933 1934 ocfs2_release_system_inodes(osb); 1935 1936 /* 1937 * If we're dismounting due to mount error, mount.ocfs2 will clean 1938 * up heartbeat. If we're a local mount, there is no heartbeat. 1939 * If we failed before we got a uuid_str yet, we can't stop 1940 * heartbeat. Otherwise, do it. 1941 */ 1942 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1943 hangup_needed = 1; 1944 1945 if (osb->cconn) 1946 ocfs2_dlm_shutdown(osb, hangup_needed); 1947 1948 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1949 debugfs_remove(osb->osb_debug_root); 1950 1951 if (hangup_needed) 1952 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1953 1954 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1955 1956 if (ocfs2_mount_local(osb)) 1957 snprintf(nodestr, sizeof(nodestr), "local"); 1958 else 1959 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1960 1961 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1962 osb->dev_str, nodestr); 1963 1964 ocfs2_delete_osb(osb); 1965 kfree(osb); 1966 sb->s_dev = 0; 1967 sb->s_fs_info = NULL; 1968 } 1969 1970 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1971 unsigned uuid_bytes) 1972 { 1973 int i, ret; 1974 char *ptr; 1975 1976 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1977 1978 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1979 if (osb->uuid_str == NULL) 1980 return -ENOMEM; 1981 1982 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1983 /* print with null */ 1984 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1985 if (ret != 2) /* drop super cleans up */ 1986 return -EINVAL; 1987 /* then only advance past the last char */ 1988 ptr += 2; 1989 } 1990 1991 return 0; 1992 } 1993 1994 static int ocfs2_initialize_super(struct super_block *sb, 1995 struct buffer_head *bh, 1996 int sector_size, 1997 struct ocfs2_blockcheck_stats *stats) 1998 { 1999 int status; 2000 int i, cbits, bbits; 2001 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2002 struct inode *inode = NULL; 2003 struct ocfs2_journal *journal; 2004 __le32 uuid_net_key; 2005 struct ocfs2_super *osb; 2006 2007 mlog_entry_void(); 2008 2009 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2010 if (!osb) { 2011 status = -ENOMEM; 2012 mlog_errno(status); 2013 goto bail; 2014 } 2015 2016 sb->s_fs_info = osb; 2017 sb->s_op = &ocfs2_sops; 2018 sb->s_export_op = &ocfs2_export_ops; 2019 sb->s_qcop = &ocfs2_quotactl_ops; 2020 sb->dq_op = &ocfs2_quota_operations; 2021 sb->s_xattr = ocfs2_xattr_handlers; 2022 sb->s_time_gran = 1; 2023 sb->s_flags |= MS_NOATIME; 2024 /* this is needed to support O_LARGEFILE */ 2025 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2026 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2027 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2028 2029 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2030 2031 for (i = 0; i < 3; i++) 2032 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2033 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2034 2035 osb->sb = sb; 2036 /* Save off for ocfs2_rw_direct */ 2037 osb->s_sectsize_bits = blksize_bits(sector_size); 2038 BUG_ON(!osb->s_sectsize_bits); 2039 2040 spin_lock_init(&osb->dc_task_lock); 2041 init_waitqueue_head(&osb->dc_event); 2042 osb->dc_work_sequence = 0; 2043 osb->dc_wake_sequence = 0; 2044 INIT_LIST_HEAD(&osb->blocked_lock_list); 2045 osb->blocked_lock_count = 0; 2046 spin_lock_init(&osb->osb_lock); 2047 spin_lock_init(&osb->osb_xattr_lock); 2048 ocfs2_init_steal_slots(osb); 2049 2050 atomic_set(&osb->alloc_stats.moves, 0); 2051 atomic_set(&osb->alloc_stats.local_data, 0); 2052 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2053 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2054 atomic_set(&osb->alloc_stats.bg_extends, 0); 2055 2056 /* Copy the blockcheck stats from the superblock probe */ 2057 osb->osb_ecc_stats = *stats; 2058 2059 ocfs2_init_node_maps(osb); 2060 2061 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2062 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2063 2064 ocfs2_orphan_scan_init(osb); 2065 2066 status = ocfs2_recovery_init(osb); 2067 if (status) { 2068 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2069 mlog_errno(status); 2070 goto bail; 2071 } 2072 2073 init_waitqueue_head(&osb->checkpoint_event); 2074 atomic_set(&osb->needs_checkpoint, 0); 2075 2076 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2077 2078 osb->slot_num = OCFS2_INVALID_SLOT; 2079 2080 osb->s_xattr_inline_size = le16_to_cpu( 2081 di->id2.i_super.s_xattr_inline_size); 2082 2083 osb->local_alloc_state = OCFS2_LA_UNUSED; 2084 osb->local_alloc_bh = NULL; 2085 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2086 2087 init_waitqueue_head(&osb->osb_mount_event); 2088 2089 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2090 if (status) { 2091 mlog_errno(status); 2092 goto bail; 2093 } 2094 2095 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2096 if (!osb->vol_label) { 2097 mlog(ML_ERROR, "unable to alloc vol label\n"); 2098 status = -ENOMEM; 2099 goto bail; 2100 } 2101 2102 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2103 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2104 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2105 osb->max_slots); 2106 status = -EINVAL; 2107 goto bail; 2108 } 2109 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 2110 2111 osb->slot_recovery_generations = 2112 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2113 GFP_KERNEL); 2114 if (!osb->slot_recovery_generations) { 2115 status = -ENOMEM; 2116 mlog_errno(status); 2117 goto bail; 2118 } 2119 2120 init_waitqueue_head(&osb->osb_wipe_event); 2121 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2122 sizeof(*osb->osb_orphan_wipes), 2123 GFP_KERNEL); 2124 if (!osb->osb_orphan_wipes) { 2125 status = -ENOMEM; 2126 mlog_errno(status); 2127 goto bail; 2128 } 2129 2130 osb->osb_rf_lock_tree = RB_ROOT; 2131 2132 osb->s_feature_compat = 2133 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2134 osb->s_feature_ro_compat = 2135 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2136 osb->s_feature_incompat = 2137 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2138 2139 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2140 mlog(ML_ERROR, "couldn't mount because of unsupported " 2141 "optional features (%x).\n", i); 2142 status = -EINVAL; 2143 goto bail; 2144 } 2145 if (!(osb->sb->s_flags & MS_RDONLY) && 2146 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2147 mlog(ML_ERROR, "couldn't mount RDWR because of " 2148 "unsupported optional features (%x).\n", i); 2149 status = -EINVAL; 2150 goto bail; 2151 } 2152 2153 if (ocfs2_userspace_stack(osb)) { 2154 memcpy(osb->osb_cluster_stack, 2155 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2156 OCFS2_STACK_LABEL_LEN); 2157 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 2158 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2159 mlog(ML_ERROR, 2160 "couldn't mount because of an invalid " 2161 "cluster stack label (%s) \n", 2162 osb->osb_cluster_stack); 2163 status = -EINVAL; 2164 goto bail; 2165 } 2166 } else { 2167 /* The empty string is identical with classic tools that 2168 * don't know about s_cluster_info. */ 2169 osb->osb_cluster_stack[0] = '\0'; 2170 } 2171 2172 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2173 2174 /* FIXME 2175 * This should be done in ocfs2_journal_init(), but unknown 2176 * ordering issues will cause the filesystem to crash. 2177 * If anyone wants to figure out what part of the code 2178 * refers to osb->journal before ocfs2_journal_init() is run, 2179 * be my guest. 2180 */ 2181 /* initialize our journal structure */ 2182 2183 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2184 if (!journal) { 2185 mlog(ML_ERROR, "unable to alloc journal\n"); 2186 status = -ENOMEM; 2187 goto bail; 2188 } 2189 osb->journal = journal; 2190 journal->j_osb = osb; 2191 2192 atomic_set(&journal->j_num_trans, 0); 2193 init_rwsem(&journal->j_trans_barrier); 2194 init_waitqueue_head(&journal->j_checkpointed); 2195 spin_lock_init(&journal->j_lock); 2196 journal->j_trans_id = (unsigned long) 1; 2197 INIT_LIST_HEAD(&journal->j_la_cleanups); 2198 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2199 journal->j_state = OCFS2_JOURNAL_FREE; 2200 2201 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 2202 osb->dentry_lock_list = NULL; 2203 2204 /* get some pseudo constants for clustersize bits */ 2205 osb->s_clustersize_bits = 2206 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2207 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2208 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 2209 2210 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2211 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2212 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2213 osb->s_clustersize); 2214 status = -EINVAL; 2215 goto bail; 2216 } 2217 2218 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 2219 > (u32)~0UL) { 2220 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 2221 "what jbd can address in 32 bits.\n"); 2222 status = -EINVAL; 2223 goto bail; 2224 } 2225 2226 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2227 sizeof(di->id2.i_super.s_uuid))) { 2228 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2229 status = -ENOMEM; 2230 goto bail; 2231 } 2232 2233 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 2234 2235 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 2236 osb->vol_label[63] = '\0'; 2237 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2238 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2239 osb->first_cluster_group_blkno = 2240 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2241 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2242 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2243 mlog(0, "vol_label: %s\n", osb->vol_label); 2244 mlog(0, "uuid: %s\n", osb->uuid_str); 2245 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 2246 (unsigned long long)osb->root_blkno, 2247 (unsigned long long)osb->system_dir_blkno); 2248 2249 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2250 if (!osb->osb_dlm_debug) { 2251 status = -ENOMEM; 2252 mlog_errno(status); 2253 goto bail; 2254 } 2255 2256 atomic_set(&osb->vol_state, VOLUME_INIT); 2257 2258 /* load root, system_dir, and all global system inodes */ 2259 status = ocfs2_init_global_system_inodes(osb); 2260 if (status < 0) { 2261 mlog_errno(status); 2262 goto bail; 2263 } 2264 2265 /* 2266 * global bitmap 2267 */ 2268 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2269 OCFS2_INVALID_SLOT); 2270 if (!inode) { 2271 status = -EINVAL; 2272 mlog_errno(status); 2273 goto bail; 2274 } 2275 2276 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2277 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2278 iput(inode); 2279 2280 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2281 osb->s_feature_incompat) * 8; 2282 2283 status = ocfs2_init_slot_info(osb); 2284 if (status < 0) { 2285 mlog_errno(status); 2286 goto bail; 2287 } 2288 2289 bail: 2290 mlog_exit(status); 2291 return status; 2292 } 2293 2294 /* 2295 * will return: -EAGAIN if it is ok to keep searching for superblocks 2296 * -EINVAL if there is a bad superblock 2297 * 0 on success 2298 */ 2299 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2300 struct buffer_head *bh, 2301 u32 blksz, 2302 struct ocfs2_blockcheck_stats *stats) 2303 { 2304 int status = -EAGAIN; 2305 2306 mlog_entry_void(); 2307 2308 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2309 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2310 /* We have to do a raw check of the feature here */ 2311 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2312 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2313 status = ocfs2_block_check_validate(bh->b_data, 2314 bh->b_size, 2315 &di->i_check, 2316 stats); 2317 if (status) 2318 goto out; 2319 } 2320 status = -EINVAL; 2321 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2322 mlog(ML_ERROR, "found superblock with incorrect block " 2323 "size: found %u, should be %u\n", 2324 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2325 blksz); 2326 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2327 OCFS2_MAJOR_REV_LEVEL || 2328 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2329 OCFS2_MINOR_REV_LEVEL) { 2330 mlog(ML_ERROR, "found superblock with bad version: " 2331 "found %u.%u, should be %u.%u\n", 2332 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2333 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2334 OCFS2_MAJOR_REV_LEVEL, 2335 OCFS2_MINOR_REV_LEVEL); 2336 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2337 mlog(ML_ERROR, "bad block number on superblock: " 2338 "found %llu, should be %llu\n", 2339 (unsigned long long)le64_to_cpu(di->i_blkno), 2340 (unsigned long long)bh->b_blocknr); 2341 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2342 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2343 mlog(ML_ERROR, "bad cluster size found: %u\n", 2344 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2345 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2346 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2347 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2348 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2349 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2350 mlog(ML_ERROR, 2351 "Superblock slots found greater than file system " 2352 "maximum: found %u, max %u\n", 2353 le16_to_cpu(di->id2.i_super.s_max_slots), 2354 OCFS2_MAX_SLOTS); 2355 } else { 2356 /* found it! */ 2357 status = 0; 2358 } 2359 } 2360 2361 out: 2362 mlog_exit(status); 2363 return status; 2364 } 2365 2366 static int ocfs2_check_volume(struct ocfs2_super *osb) 2367 { 2368 int status; 2369 int dirty; 2370 int local; 2371 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2372 * recover 2373 * ourselves. */ 2374 2375 mlog_entry_void(); 2376 2377 /* Init our journal object. */ 2378 status = ocfs2_journal_init(osb->journal, &dirty); 2379 if (status < 0) { 2380 mlog(ML_ERROR, "Could not initialize journal!\n"); 2381 goto finally; 2382 } 2383 2384 /* If the journal was unmounted cleanly then we don't want to 2385 * recover anything. Otherwise, journal_load will do that 2386 * dirty work for us :) */ 2387 if (!dirty) { 2388 status = ocfs2_journal_wipe(osb->journal, 0); 2389 if (status < 0) { 2390 mlog_errno(status); 2391 goto finally; 2392 } 2393 } else { 2394 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2395 "recovering volume.\n"); 2396 } 2397 2398 local = ocfs2_mount_local(osb); 2399 2400 /* will play back anything left in the journal. */ 2401 status = ocfs2_journal_load(osb->journal, local, dirty); 2402 if (status < 0) { 2403 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2404 goto finally; 2405 } 2406 2407 if (dirty) { 2408 /* recover my local alloc if we didn't unmount cleanly. */ 2409 status = ocfs2_begin_local_alloc_recovery(osb, 2410 osb->slot_num, 2411 &local_alloc); 2412 if (status < 0) { 2413 mlog_errno(status); 2414 goto finally; 2415 } 2416 /* we complete the recovery process after we've marked 2417 * ourselves as mounted. */ 2418 } 2419 2420 mlog(0, "Journal loaded.\n"); 2421 2422 status = ocfs2_load_local_alloc(osb); 2423 if (status < 0) { 2424 mlog_errno(status); 2425 goto finally; 2426 } 2427 2428 if (dirty) { 2429 /* Recovery will be completed after we've mounted the 2430 * rest of the volume. */ 2431 osb->dirty = 1; 2432 osb->local_alloc_copy = local_alloc; 2433 local_alloc = NULL; 2434 } 2435 2436 /* go through each journal, trylock it and if you get the 2437 * lock, and it's marked as dirty, set the bit in the recover 2438 * map and launch a recovery thread for it. */ 2439 status = ocfs2_mark_dead_nodes(osb); 2440 if (status < 0) { 2441 mlog_errno(status); 2442 goto finally; 2443 } 2444 2445 status = ocfs2_compute_replay_slots(osb); 2446 if (status < 0) 2447 mlog_errno(status); 2448 2449 finally: 2450 if (local_alloc) 2451 kfree(local_alloc); 2452 2453 mlog_exit(status); 2454 return status; 2455 } 2456 2457 /* 2458 * The routine gets called from dismount or close whenever a dismount on 2459 * volume is requested and the osb open count becomes 1. 2460 * It will remove the osb from the global list and also free up all the 2461 * initialized resources and fileobject. 2462 */ 2463 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2464 { 2465 mlog_entry_void(); 2466 2467 /* This function assumes that the caller has the main osb resource */ 2468 2469 ocfs2_free_slot_info(osb); 2470 2471 kfree(osb->osb_orphan_wipes); 2472 kfree(osb->slot_recovery_generations); 2473 /* FIXME 2474 * This belongs in journal shutdown, but because we have to 2475 * allocate osb->journal at the start of ocfs2_initalize_osb(), 2476 * we free it here. 2477 */ 2478 kfree(osb->journal); 2479 if (osb->local_alloc_copy) 2480 kfree(osb->local_alloc_copy); 2481 kfree(osb->uuid_str); 2482 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2483 memset(osb, 0, sizeof(struct ocfs2_super)); 2484 2485 mlog_exit_void(); 2486 } 2487 2488 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2489 * panic(). We do not support continue-on-error operation. */ 2490 static void ocfs2_handle_error(struct super_block *sb) 2491 { 2492 struct ocfs2_super *osb = OCFS2_SB(sb); 2493 2494 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2495 panic("OCFS2: (device %s): panic forced after error\n", 2496 sb->s_id); 2497 2498 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2499 2500 if (sb->s_flags & MS_RDONLY && 2501 (ocfs2_is_soft_readonly(osb) || 2502 ocfs2_is_hard_readonly(osb))) 2503 return; 2504 2505 printk(KERN_CRIT "File system is now read-only due to the potential " 2506 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2507 "system is unmounted.\n"); 2508 sb->s_flags |= MS_RDONLY; 2509 ocfs2_set_ro_flag(osb, 0); 2510 } 2511 2512 static char error_buf[1024]; 2513 2514 void __ocfs2_error(struct super_block *sb, 2515 const char *function, 2516 const char *fmt, ...) 2517 { 2518 va_list args; 2519 2520 va_start(args, fmt); 2521 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2522 va_end(args); 2523 2524 /* Not using mlog here because we want to show the actual 2525 * function the error came from. */ 2526 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2527 sb->s_id, function, error_buf); 2528 2529 ocfs2_handle_error(sb); 2530 } 2531 2532 /* Handle critical errors. This is intentionally more drastic than 2533 * ocfs2_handle_error, so we only use for things like journal errors, 2534 * etc. */ 2535 void __ocfs2_abort(struct super_block* sb, 2536 const char *function, 2537 const char *fmt, ...) 2538 { 2539 va_list args; 2540 2541 va_start(args, fmt); 2542 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2543 va_end(args); 2544 2545 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2546 sb->s_id, function, error_buf); 2547 2548 /* We don't have the cluster support yet to go straight to 2549 * hard readonly in here. Until then, we want to keep 2550 * ocfs2_abort() so that we can at least mark critical 2551 * errors. 2552 * 2553 * TODO: This should abort the journal and alert other nodes 2554 * that our slot needs recovery. */ 2555 2556 /* Force a panic(). This stinks, but it's better than letting 2557 * things continue without having a proper hard readonly 2558 * here. */ 2559 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2560 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2561 ocfs2_handle_error(sb); 2562 } 2563 2564 /* 2565 * Void signal blockers, because in-kernel sigprocmask() only fails 2566 * when SIG_* is wrong. 2567 */ 2568 void ocfs2_block_signals(sigset_t *oldset) 2569 { 2570 int rc; 2571 sigset_t blocked; 2572 2573 sigfillset(&blocked); 2574 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2575 BUG_ON(rc); 2576 } 2577 2578 void ocfs2_unblock_signals(sigset_t *oldset) 2579 { 2580 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2581 BUG_ON(rc); 2582 } 2583 2584 module_init(ocfs2_init); 2585 module_exit(ocfs2_exit); 2586