1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/utsname.h> 32 #include <linux/init.h> 33 #include <linux/random.h> 34 #include <linux/statfs.h> 35 #include <linux/moduleparam.h> 36 #include <linux/blkdev.h> 37 #include <linux/socket.h> 38 #include <linux/inet.h> 39 #include <linux/parser.h> 40 #include <linux/crc32.h> 41 #include <linux/debugfs.h> 42 #include <linux/mount.h> 43 #include <linux/seq_file.h> 44 45 #define MLOG_MASK_PREFIX ML_SUPER 46 #include <cluster/masklog.h> 47 48 #include "ocfs2.h" 49 50 /* this should be the only file to include a version 1 header */ 51 #include "ocfs1_fs_compat.h" 52 53 #include "alloc.h" 54 #include "dlmglue.h" 55 #include "export.h" 56 #include "extent_map.h" 57 #include "heartbeat.h" 58 #include "inode.h" 59 #include "journal.h" 60 #include "localalloc.h" 61 #include "namei.h" 62 #include "slot_map.h" 63 #include "super.h" 64 #include "sysfile.h" 65 #include "uptodate.h" 66 #include "ver.h" 67 68 #include "buffer_head_io.h" 69 70 static struct kmem_cache *ocfs2_inode_cachep = NULL; 71 72 /* OCFS2 needs to schedule several differnt types of work which 73 * require cluster locking, disk I/O, recovery waits, etc. Since these 74 * types of work tend to be heavy we avoid using the kernel events 75 * workqueue and schedule on our own. */ 76 struct workqueue_struct *ocfs2_wq = NULL; 77 78 static struct dentry *ocfs2_debugfs_root = NULL; 79 80 MODULE_AUTHOR("Oracle"); 81 MODULE_LICENSE("GPL"); 82 83 struct mount_options 84 { 85 unsigned long commit_interval; 86 unsigned long mount_opt; 87 unsigned int atime_quantum; 88 signed short slot; 89 unsigned int localalloc_opt; 90 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 91 }; 92 93 static int ocfs2_parse_options(struct super_block *sb, char *options, 94 struct mount_options *mopt, 95 int is_remount); 96 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 97 static void ocfs2_put_super(struct super_block *sb); 98 static int ocfs2_mount_volume(struct super_block *sb); 99 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 100 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 101 static int ocfs2_initialize_mem_caches(void); 102 static void ocfs2_free_mem_caches(void); 103 static void ocfs2_delete_osb(struct ocfs2_super *osb); 104 105 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 106 107 static int ocfs2_sync_fs(struct super_block *sb, int wait); 108 109 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 110 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 111 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 112 static int ocfs2_check_volume(struct ocfs2_super *osb); 113 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 114 struct buffer_head *bh, 115 u32 sectsize); 116 static int ocfs2_initialize_super(struct super_block *sb, 117 struct buffer_head *bh, 118 int sector_size); 119 static int ocfs2_get_sector(struct super_block *sb, 120 struct buffer_head **bh, 121 int block, 122 int sect_size); 123 static void ocfs2_write_super(struct super_block *sb); 124 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 125 static void ocfs2_destroy_inode(struct inode *inode); 126 127 static const struct super_operations ocfs2_sops = { 128 .statfs = ocfs2_statfs, 129 .alloc_inode = ocfs2_alloc_inode, 130 .destroy_inode = ocfs2_destroy_inode, 131 .drop_inode = ocfs2_drop_inode, 132 .clear_inode = ocfs2_clear_inode, 133 .delete_inode = ocfs2_delete_inode, 134 .sync_fs = ocfs2_sync_fs, 135 .write_super = ocfs2_write_super, 136 .put_super = ocfs2_put_super, 137 .remount_fs = ocfs2_remount, 138 .show_options = ocfs2_show_options, 139 }; 140 141 enum { 142 Opt_barrier, 143 Opt_err_panic, 144 Opt_err_ro, 145 Opt_intr, 146 Opt_nointr, 147 Opt_hb_none, 148 Opt_hb_local, 149 Opt_data_ordered, 150 Opt_data_writeback, 151 Opt_atime_quantum, 152 Opt_slot, 153 Opt_commit, 154 Opt_localalloc, 155 Opt_localflocks, 156 Opt_stack, 157 Opt_err, 158 }; 159 160 static match_table_t tokens = { 161 {Opt_barrier, "barrier=%u"}, 162 {Opt_err_panic, "errors=panic"}, 163 {Opt_err_ro, "errors=remount-ro"}, 164 {Opt_intr, "intr"}, 165 {Opt_nointr, "nointr"}, 166 {Opt_hb_none, OCFS2_HB_NONE}, 167 {Opt_hb_local, OCFS2_HB_LOCAL}, 168 {Opt_data_ordered, "data=ordered"}, 169 {Opt_data_writeback, "data=writeback"}, 170 {Opt_atime_quantum, "atime_quantum=%u"}, 171 {Opt_slot, "preferred_slot=%u"}, 172 {Opt_commit, "commit=%u"}, 173 {Opt_localalloc, "localalloc=%d"}, 174 {Opt_localflocks, "localflocks"}, 175 {Opt_stack, "cluster_stack=%s"}, 176 {Opt_err, NULL} 177 }; 178 179 /* 180 * write_super and sync_fs ripped right out of ext3. 181 */ 182 static void ocfs2_write_super(struct super_block *sb) 183 { 184 if (mutex_trylock(&sb->s_lock) != 0) 185 BUG(); 186 sb->s_dirt = 0; 187 } 188 189 static int ocfs2_sync_fs(struct super_block *sb, int wait) 190 { 191 int status; 192 tid_t target; 193 struct ocfs2_super *osb = OCFS2_SB(sb); 194 195 sb->s_dirt = 0; 196 197 if (ocfs2_is_hard_readonly(osb)) 198 return -EROFS; 199 200 if (wait) { 201 status = ocfs2_flush_truncate_log(osb); 202 if (status < 0) 203 mlog_errno(status); 204 } else { 205 ocfs2_schedule_truncate_log_flush(osb, 0); 206 } 207 208 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) { 209 if (wait) 210 log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 211 target); 212 } 213 return 0; 214 } 215 216 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 217 { 218 struct inode *new = NULL; 219 int status = 0; 220 int i; 221 222 mlog_entry_void(); 223 224 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 225 if (IS_ERR(new)) { 226 status = PTR_ERR(new); 227 mlog_errno(status); 228 goto bail; 229 } 230 osb->root_inode = new; 231 232 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 233 if (IS_ERR(new)) { 234 status = PTR_ERR(new); 235 mlog_errno(status); 236 goto bail; 237 } 238 osb->sys_root_inode = new; 239 240 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 241 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 242 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 243 if (!new) { 244 ocfs2_release_system_inodes(osb); 245 status = -EINVAL; 246 mlog_errno(status); 247 /* FIXME: Should ERROR_RO_FS */ 248 mlog(ML_ERROR, "Unable to load system inode %d, " 249 "possibly corrupt fs?", i); 250 goto bail; 251 } 252 // the array now has one ref, so drop this one 253 iput(new); 254 } 255 256 bail: 257 mlog_exit(status); 258 return status; 259 } 260 261 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 262 { 263 struct inode *new = NULL; 264 int status = 0; 265 int i; 266 267 mlog_entry_void(); 268 269 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 270 i < NUM_SYSTEM_INODES; 271 i++) { 272 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 273 if (!new) { 274 ocfs2_release_system_inodes(osb); 275 status = -EINVAL; 276 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 277 status, i, osb->slot_num); 278 goto bail; 279 } 280 /* the array now has one ref, so drop this one */ 281 iput(new); 282 } 283 284 bail: 285 mlog_exit(status); 286 return status; 287 } 288 289 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 290 { 291 int i; 292 struct inode *inode; 293 294 mlog_entry_void(); 295 296 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 297 inode = osb->system_inodes[i]; 298 if (inode) { 299 iput(inode); 300 osb->system_inodes[i] = NULL; 301 } 302 } 303 304 inode = osb->sys_root_inode; 305 if (inode) { 306 iput(inode); 307 osb->sys_root_inode = NULL; 308 } 309 310 inode = osb->root_inode; 311 if (inode) { 312 iput(inode); 313 osb->root_inode = NULL; 314 } 315 316 mlog_exit(0); 317 } 318 319 /* We're allocating fs objects, use GFP_NOFS */ 320 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 321 { 322 struct ocfs2_inode_info *oi; 323 324 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 325 if (!oi) 326 return NULL; 327 328 return &oi->vfs_inode; 329 } 330 331 static void ocfs2_destroy_inode(struct inode *inode) 332 { 333 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 334 } 335 336 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 337 unsigned int cbits) 338 { 339 unsigned int bytes = 1 << cbits; 340 unsigned int trim = bytes; 341 unsigned int bitshift = 32; 342 343 /* 344 * i_size and all block offsets in ocfs2 are always 64 bits 345 * wide. i_clusters is 32 bits, in cluster-sized units. So on 346 * 64 bit platforms, cluster size will be the limiting factor. 347 */ 348 349 #if BITS_PER_LONG == 32 350 # if defined(CONFIG_LBD) 351 BUILD_BUG_ON(sizeof(sector_t) != 8); 352 /* 353 * We might be limited by page cache size. 354 */ 355 if (bytes > PAGE_CACHE_SIZE) { 356 bytes = PAGE_CACHE_SIZE; 357 trim = 1; 358 /* 359 * Shift by 31 here so that we don't get larger than 360 * MAX_LFS_FILESIZE 361 */ 362 bitshift = 31; 363 } 364 # else 365 /* 366 * We are limited by the size of sector_t. Use block size, as 367 * that's what we expose to the VFS. 368 */ 369 bytes = 1 << bbits; 370 trim = 1; 371 bitshift = 31; 372 # endif 373 #endif 374 375 /* 376 * Trim by a whole cluster when we can actually approach the 377 * on-disk limits. Otherwise we can overflow i_clusters when 378 * an extent start is at the max offset. 379 */ 380 return (((unsigned long long)bytes) << bitshift) - trim; 381 } 382 383 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 384 { 385 int incompat_features; 386 int ret = 0; 387 struct mount_options parsed_options; 388 struct ocfs2_super *osb = OCFS2_SB(sb); 389 390 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 391 ret = -EINVAL; 392 goto out; 393 } 394 395 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 396 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 397 ret = -EINVAL; 398 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 399 goto out; 400 } 401 402 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 403 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 404 ret = -EINVAL; 405 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 406 goto out; 407 } 408 409 /* We're going to/from readonly mode. */ 410 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 411 /* Lock here so the check of HARD_RO and the potential 412 * setting of SOFT_RO is atomic. */ 413 spin_lock(&osb->osb_lock); 414 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 415 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 416 ret = -EROFS; 417 goto unlock_osb; 418 } 419 420 if (*flags & MS_RDONLY) { 421 mlog(0, "Going to ro mode.\n"); 422 sb->s_flags |= MS_RDONLY; 423 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 424 } else { 425 mlog(0, "Making ro filesystem writeable.\n"); 426 427 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 428 mlog(ML_ERROR, "Cannot remount RDWR " 429 "filesystem due to previous errors.\n"); 430 ret = -EROFS; 431 goto unlock_osb; 432 } 433 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 434 if (incompat_features) { 435 mlog(ML_ERROR, "Cannot remount RDWR because " 436 "of unsupported optional features " 437 "(%x).\n", incompat_features); 438 ret = -EINVAL; 439 goto unlock_osb; 440 } 441 sb->s_flags &= ~MS_RDONLY; 442 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 443 } 444 unlock_osb: 445 spin_unlock(&osb->osb_lock); 446 } 447 448 if (!ret) { 449 /* Only save off the new mount options in case of a successful 450 * remount. */ 451 osb->s_mount_opt = parsed_options.mount_opt; 452 osb->s_atime_quantum = parsed_options.atime_quantum; 453 osb->preferred_slot = parsed_options.slot; 454 if (parsed_options.commit_interval) 455 osb->osb_commit_interval = parsed_options.commit_interval; 456 457 if (!ocfs2_is_hard_readonly(osb)) 458 ocfs2_set_journal_params(osb); 459 } 460 out: 461 return ret; 462 } 463 464 static int ocfs2_sb_probe(struct super_block *sb, 465 struct buffer_head **bh, 466 int *sector_size) 467 { 468 int status, tmpstat; 469 struct ocfs1_vol_disk_hdr *hdr; 470 struct ocfs2_dinode *di; 471 int blksize; 472 473 *bh = NULL; 474 475 /* may be > 512 */ 476 *sector_size = bdev_hardsect_size(sb->s_bdev); 477 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 478 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 479 *sector_size, OCFS2_MAX_BLOCKSIZE); 480 status = -EINVAL; 481 goto bail; 482 } 483 484 /* Can this really happen? */ 485 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 486 *sector_size = OCFS2_MIN_BLOCKSIZE; 487 488 /* check block zero for old format */ 489 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 490 if (status < 0) { 491 mlog_errno(status); 492 goto bail; 493 } 494 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 495 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 496 mlog(ML_ERROR, "incompatible version: %u.%u\n", 497 hdr->major_version, hdr->minor_version); 498 status = -EINVAL; 499 } 500 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 501 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 502 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 503 hdr->signature); 504 status = -EINVAL; 505 } 506 brelse(*bh); 507 *bh = NULL; 508 if (status < 0) { 509 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 510 "upgraded before mounting with ocfs v2\n"); 511 goto bail; 512 } 513 514 /* 515 * Now check at magic offset for 512, 1024, 2048, 4096 516 * blocksizes. 4096 is the maximum blocksize because it is 517 * the minimum clustersize. 518 */ 519 status = -EINVAL; 520 for (blksize = *sector_size; 521 blksize <= OCFS2_MAX_BLOCKSIZE; 522 blksize <<= 1) { 523 tmpstat = ocfs2_get_sector(sb, bh, 524 OCFS2_SUPER_BLOCK_BLKNO, 525 blksize); 526 if (tmpstat < 0) { 527 status = tmpstat; 528 mlog_errno(status); 529 goto bail; 530 } 531 di = (struct ocfs2_dinode *) (*bh)->b_data; 532 status = ocfs2_verify_volume(di, *bh, blksize); 533 if (status >= 0) 534 goto bail; 535 brelse(*bh); 536 *bh = NULL; 537 if (status != -EAGAIN) 538 break; 539 } 540 541 bail: 542 return status; 543 } 544 545 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 546 { 547 if (ocfs2_mount_local(osb)) { 548 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 549 mlog(ML_ERROR, "Cannot heartbeat on a locally " 550 "mounted device.\n"); 551 return -EINVAL; 552 } 553 } 554 555 if (ocfs2_userspace_stack(osb)) { 556 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 557 mlog(ML_ERROR, "Userspace stack expected, but " 558 "o2cb heartbeat arguments passed to mount\n"); 559 return -EINVAL; 560 } 561 } 562 563 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 564 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 565 !ocfs2_userspace_stack(osb)) { 566 mlog(ML_ERROR, "Heartbeat has to be started to mount " 567 "a read-write clustered device.\n"); 568 return -EINVAL; 569 } 570 } 571 572 return 0; 573 } 574 575 /* 576 * If we're using a userspace stack, mount should have passed 577 * a name that matches the disk. If not, mount should not 578 * have passed a stack. 579 */ 580 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 581 struct mount_options *mopt) 582 { 583 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 584 mlog(ML_ERROR, 585 "cluster stack passed to mount, but this filesystem " 586 "does not support it\n"); 587 return -EINVAL; 588 } 589 590 if (ocfs2_userspace_stack(osb) && 591 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 592 OCFS2_STACK_LABEL_LEN)) { 593 mlog(ML_ERROR, 594 "cluster stack passed to mount (\"%s\") does not " 595 "match the filesystem (\"%s\")\n", 596 mopt->cluster_stack, 597 osb->osb_cluster_stack); 598 return -EINVAL; 599 } 600 601 return 0; 602 } 603 604 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 605 { 606 struct dentry *root; 607 int status, sector_size; 608 struct mount_options parsed_options; 609 struct inode *inode = NULL; 610 struct ocfs2_super *osb = NULL; 611 struct buffer_head *bh = NULL; 612 char nodestr[8]; 613 614 mlog_entry("%p, %p, %i", sb, data, silent); 615 616 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 617 status = -EINVAL; 618 goto read_super_error; 619 } 620 621 /* probe for superblock */ 622 status = ocfs2_sb_probe(sb, &bh, §or_size); 623 if (status < 0) { 624 mlog(ML_ERROR, "superblock probe failed!\n"); 625 goto read_super_error; 626 } 627 628 status = ocfs2_initialize_super(sb, bh, sector_size); 629 osb = OCFS2_SB(sb); 630 if (status < 0) { 631 mlog_errno(status); 632 goto read_super_error; 633 } 634 brelse(bh); 635 bh = NULL; 636 osb->s_mount_opt = parsed_options.mount_opt; 637 osb->s_atime_quantum = parsed_options.atime_quantum; 638 osb->preferred_slot = parsed_options.slot; 639 osb->osb_commit_interval = parsed_options.commit_interval; 640 osb->local_alloc_size = parsed_options.localalloc_opt; 641 642 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 643 if (status) 644 goto read_super_error; 645 646 sb->s_magic = OCFS2_SUPER_MAGIC; 647 648 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 649 * heartbeat=none */ 650 if (bdev_read_only(sb->s_bdev)) { 651 if (!(sb->s_flags & MS_RDONLY)) { 652 status = -EACCES; 653 mlog(ML_ERROR, "Readonly device detected but readonly " 654 "mount was not specified.\n"); 655 goto read_super_error; 656 } 657 658 /* You should not be able to start a local heartbeat 659 * on a readonly device. */ 660 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 661 status = -EROFS; 662 mlog(ML_ERROR, "Local heartbeat specified on readonly " 663 "device.\n"); 664 goto read_super_error; 665 } 666 667 status = ocfs2_check_journals_nolocks(osb); 668 if (status < 0) { 669 if (status == -EROFS) 670 mlog(ML_ERROR, "Recovery required on readonly " 671 "file system, but write access is " 672 "unavailable.\n"); 673 else 674 mlog_errno(status); 675 goto read_super_error; 676 } 677 678 ocfs2_set_ro_flag(osb, 1); 679 680 printk(KERN_NOTICE "Readonly device detected. No cluster " 681 "services will be utilized for this mount. Recovery " 682 "will be skipped.\n"); 683 } 684 685 if (!ocfs2_is_hard_readonly(osb)) { 686 if (sb->s_flags & MS_RDONLY) 687 ocfs2_set_ro_flag(osb, 0); 688 } 689 690 status = ocfs2_verify_heartbeat(osb); 691 if (status < 0) { 692 mlog_errno(status); 693 goto read_super_error; 694 } 695 696 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 697 ocfs2_debugfs_root); 698 if (!osb->osb_debug_root) { 699 status = -EINVAL; 700 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 701 goto read_super_error; 702 } 703 704 status = ocfs2_mount_volume(sb); 705 if (osb->root_inode) 706 inode = igrab(osb->root_inode); 707 708 if (status < 0) 709 goto read_super_error; 710 711 if (!inode) { 712 status = -EIO; 713 mlog_errno(status); 714 goto read_super_error; 715 } 716 717 root = d_alloc_root(inode); 718 if (!root) { 719 status = -ENOMEM; 720 mlog_errno(status); 721 goto read_super_error; 722 } 723 724 sb->s_root = root; 725 726 ocfs2_complete_mount_recovery(osb); 727 728 if (ocfs2_mount_local(osb)) 729 snprintf(nodestr, sizeof(nodestr), "local"); 730 else 731 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 732 733 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 734 "with %s data mode.\n", 735 osb->dev_str, nodestr, osb->slot_num, 736 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 737 "ordered"); 738 739 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 740 wake_up(&osb->osb_mount_event); 741 742 mlog_exit(status); 743 return status; 744 745 read_super_error: 746 if (bh != NULL) 747 brelse(bh); 748 749 if (inode) 750 iput(inode); 751 752 if (osb) { 753 atomic_set(&osb->vol_state, VOLUME_DISABLED); 754 wake_up(&osb->osb_mount_event); 755 ocfs2_dismount_volume(sb, 1); 756 } 757 758 mlog_exit(status); 759 return status; 760 } 761 762 static int ocfs2_get_sb(struct file_system_type *fs_type, 763 int flags, 764 const char *dev_name, 765 void *data, 766 struct vfsmount *mnt) 767 { 768 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 769 mnt); 770 } 771 772 static struct file_system_type ocfs2_fs_type = { 773 .owner = THIS_MODULE, 774 .name = "ocfs2", 775 .get_sb = ocfs2_get_sb, /* is this called when we mount 776 * the fs? */ 777 .kill_sb = kill_block_super, /* set to the generic one 778 * right now, but do we 779 * need to change that? */ 780 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 781 .next = NULL 782 }; 783 784 static int ocfs2_parse_options(struct super_block *sb, 785 char *options, 786 struct mount_options *mopt, 787 int is_remount) 788 { 789 int status; 790 char *p; 791 792 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 793 options ? options : "(none)"); 794 795 mopt->commit_interval = 0; 796 mopt->mount_opt = 0; 797 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 798 mopt->slot = OCFS2_INVALID_SLOT; 799 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE; 800 mopt->cluster_stack[0] = '\0'; 801 802 if (!options) { 803 status = 1; 804 goto bail; 805 } 806 807 while ((p = strsep(&options, ",")) != NULL) { 808 int token, option; 809 substring_t args[MAX_OPT_ARGS]; 810 811 if (!*p) 812 continue; 813 814 token = match_token(p, tokens, args); 815 switch (token) { 816 case Opt_hb_local: 817 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 818 break; 819 case Opt_hb_none: 820 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 821 break; 822 case Opt_barrier: 823 if (match_int(&args[0], &option)) { 824 status = 0; 825 goto bail; 826 } 827 if (option) 828 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 829 else 830 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 831 break; 832 case Opt_intr: 833 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 834 break; 835 case Opt_nointr: 836 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 837 break; 838 case Opt_err_panic: 839 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 840 break; 841 case Opt_err_ro: 842 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 843 break; 844 case Opt_data_ordered: 845 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 846 break; 847 case Opt_data_writeback: 848 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 849 break; 850 case Opt_atime_quantum: 851 if (match_int(&args[0], &option)) { 852 status = 0; 853 goto bail; 854 } 855 if (option >= 0) 856 mopt->atime_quantum = option; 857 break; 858 case Opt_slot: 859 option = 0; 860 if (match_int(&args[0], &option)) { 861 status = 0; 862 goto bail; 863 } 864 if (option) 865 mopt->slot = (s16)option; 866 break; 867 case Opt_commit: 868 option = 0; 869 if (match_int(&args[0], &option)) { 870 status = 0; 871 goto bail; 872 } 873 if (option < 0) 874 return 0; 875 if (option == 0) 876 option = JBD_DEFAULT_MAX_COMMIT_AGE; 877 mopt->commit_interval = HZ * option; 878 break; 879 case Opt_localalloc: 880 option = 0; 881 if (match_int(&args[0], &option)) { 882 status = 0; 883 goto bail; 884 } 885 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8)) 886 mopt->localalloc_opt = option; 887 break; 888 case Opt_localflocks: 889 /* 890 * Changing this during remount could race 891 * flock() requests, or "unbalance" existing 892 * ones (e.g., a lock is taken in one mode but 893 * dropped in the other). If users care enough 894 * to flip locking modes during remount, we 895 * could add a "local" flag to individual 896 * flock structures for proper tracking of 897 * state. 898 */ 899 if (!is_remount) 900 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 901 break; 902 case Opt_stack: 903 /* Check both that the option we were passed 904 * is of the right length and that it is a proper 905 * string of the right length. 906 */ 907 if (((args[0].to - args[0].from) != 908 OCFS2_STACK_LABEL_LEN) || 909 (strnlen(args[0].from, 910 OCFS2_STACK_LABEL_LEN) != 911 OCFS2_STACK_LABEL_LEN)) { 912 mlog(ML_ERROR, 913 "Invalid cluster_stack option\n"); 914 status = 0; 915 goto bail; 916 } 917 memcpy(mopt->cluster_stack, args[0].from, 918 OCFS2_STACK_LABEL_LEN); 919 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 920 break; 921 default: 922 mlog(ML_ERROR, 923 "Unrecognized mount option \"%s\" " 924 "or missing value\n", p); 925 status = 0; 926 goto bail; 927 } 928 } 929 930 status = 1; 931 932 bail: 933 mlog_exit(status); 934 return status; 935 } 936 937 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 938 { 939 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 940 unsigned long opts = osb->s_mount_opt; 941 942 if (opts & OCFS2_MOUNT_HB_LOCAL) 943 seq_printf(s, ",_netdev,heartbeat=local"); 944 else 945 seq_printf(s, ",heartbeat=none"); 946 947 if (opts & OCFS2_MOUNT_NOINTR) 948 seq_printf(s, ",nointr"); 949 950 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 951 seq_printf(s, ",data=writeback"); 952 else 953 seq_printf(s, ",data=ordered"); 954 955 if (opts & OCFS2_MOUNT_BARRIER) 956 seq_printf(s, ",barrier=1"); 957 958 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 959 seq_printf(s, ",errors=panic"); 960 else 961 seq_printf(s, ",errors=remount-ro"); 962 963 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 964 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 965 966 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 967 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 968 969 if (osb->osb_commit_interval) 970 seq_printf(s, ",commit=%u", 971 (unsigned) (osb->osb_commit_interval / HZ)); 972 973 if (osb->local_alloc_size != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE) 974 seq_printf(s, ",localalloc=%d", osb->local_alloc_size); 975 976 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 977 seq_printf(s, ",localflocks,"); 978 979 if (osb->osb_cluster_stack[0]) 980 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 981 osb->osb_cluster_stack); 982 983 return 0; 984 } 985 986 static int __init ocfs2_init(void) 987 { 988 int status; 989 990 mlog_entry_void(); 991 992 ocfs2_print_version(); 993 994 status = init_ocfs2_uptodate_cache(); 995 if (status < 0) { 996 mlog_errno(status); 997 goto leave; 998 } 999 1000 status = ocfs2_initialize_mem_caches(); 1001 if (status < 0) { 1002 mlog_errno(status); 1003 goto leave; 1004 } 1005 1006 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1007 if (!ocfs2_wq) { 1008 status = -ENOMEM; 1009 goto leave; 1010 } 1011 1012 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1013 if (!ocfs2_debugfs_root) { 1014 status = -EFAULT; 1015 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1016 } 1017 1018 ocfs2_set_locking_protocol(); 1019 1020 leave: 1021 if (status < 0) { 1022 ocfs2_free_mem_caches(); 1023 exit_ocfs2_uptodate_cache(); 1024 } 1025 1026 mlog_exit(status); 1027 1028 if (status >= 0) { 1029 return register_filesystem(&ocfs2_fs_type); 1030 } else 1031 return -1; 1032 } 1033 1034 static void __exit ocfs2_exit(void) 1035 { 1036 mlog_entry_void(); 1037 1038 if (ocfs2_wq) { 1039 flush_workqueue(ocfs2_wq); 1040 destroy_workqueue(ocfs2_wq); 1041 } 1042 1043 debugfs_remove(ocfs2_debugfs_root); 1044 1045 ocfs2_free_mem_caches(); 1046 1047 unregister_filesystem(&ocfs2_fs_type); 1048 1049 exit_ocfs2_uptodate_cache(); 1050 1051 mlog_exit_void(); 1052 } 1053 1054 static void ocfs2_put_super(struct super_block *sb) 1055 { 1056 mlog_entry("(0x%p)\n", sb); 1057 1058 ocfs2_sync_blockdev(sb); 1059 ocfs2_dismount_volume(sb, 0); 1060 1061 mlog_exit_void(); 1062 } 1063 1064 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1065 { 1066 struct ocfs2_super *osb; 1067 u32 numbits, freebits; 1068 int status; 1069 struct ocfs2_dinode *bm_lock; 1070 struct buffer_head *bh = NULL; 1071 struct inode *inode = NULL; 1072 1073 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1074 1075 osb = OCFS2_SB(dentry->d_sb); 1076 1077 inode = ocfs2_get_system_file_inode(osb, 1078 GLOBAL_BITMAP_SYSTEM_INODE, 1079 OCFS2_INVALID_SLOT); 1080 if (!inode) { 1081 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1082 status = -EIO; 1083 goto bail; 1084 } 1085 1086 status = ocfs2_inode_lock(inode, &bh, 0); 1087 if (status < 0) { 1088 mlog_errno(status); 1089 goto bail; 1090 } 1091 1092 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1093 1094 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1095 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1096 1097 buf->f_type = OCFS2_SUPER_MAGIC; 1098 buf->f_bsize = dentry->d_sb->s_blocksize; 1099 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1100 buf->f_blocks = ((sector_t) numbits) * 1101 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1102 buf->f_bfree = ((sector_t) freebits) * 1103 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1104 buf->f_bavail = buf->f_bfree; 1105 buf->f_files = numbits; 1106 buf->f_ffree = freebits; 1107 1108 brelse(bh); 1109 1110 ocfs2_inode_unlock(inode, 0); 1111 status = 0; 1112 bail: 1113 if (inode) 1114 iput(inode); 1115 1116 mlog_exit(status); 1117 1118 return status; 1119 } 1120 1121 static void ocfs2_inode_init_once(struct kmem_cache *cachep, void *data) 1122 { 1123 struct ocfs2_inode_info *oi = data; 1124 1125 oi->ip_flags = 0; 1126 oi->ip_open_count = 0; 1127 spin_lock_init(&oi->ip_lock); 1128 ocfs2_extent_map_init(&oi->vfs_inode); 1129 INIT_LIST_HEAD(&oi->ip_io_markers); 1130 oi->ip_created_trans = 0; 1131 oi->ip_last_trans = 0; 1132 oi->ip_dir_start_lookup = 0; 1133 1134 init_rwsem(&oi->ip_alloc_sem); 1135 mutex_init(&oi->ip_io_mutex); 1136 1137 oi->ip_blkno = 0ULL; 1138 oi->ip_clusters = 0; 1139 1140 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1141 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1142 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1143 1144 ocfs2_metadata_cache_init(&oi->vfs_inode); 1145 1146 inode_init_once(&oi->vfs_inode); 1147 } 1148 1149 static int ocfs2_initialize_mem_caches(void) 1150 { 1151 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1152 sizeof(struct ocfs2_inode_info), 1153 0, 1154 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1155 SLAB_MEM_SPREAD), 1156 ocfs2_inode_init_once); 1157 if (!ocfs2_inode_cachep) 1158 return -ENOMEM; 1159 1160 return 0; 1161 } 1162 1163 static void ocfs2_free_mem_caches(void) 1164 { 1165 if (ocfs2_inode_cachep) 1166 kmem_cache_destroy(ocfs2_inode_cachep); 1167 1168 ocfs2_inode_cachep = NULL; 1169 } 1170 1171 static int ocfs2_get_sector(struct super_block *sb, 1172 struct buffer_head **bh, 1173 int block, 1174 int sect_size) 1175 { 1176 if (!sb_set_blocksize(sb, sect_size)) { 1177 mlog(ML_ERROR, "unable to set blocksize\n"); 1178 return -EIO; 1179 } 1180 1181 *bh = sb_getblk(sb, block); 1182 if (!*bh) { 1183 mlog_errno(-EIO); 1184 return -EIO; 1185 } 1186 lock_buffer(*bh); 1187 if (!buffer_dirty(*bh)) 1188 clear_buffer_uptodate(*bh); 1189 unlock_buffer(*bh); 1190 ll_rw_block(READ, 1, bh); 1191 wait_on_buffer(*bh); 1192 return 0; 1193 } 1194 1195 static int ocfs2_mount_volume(struct super_block *sb) 1196 { 1197 int status = 0; 1198 int unlock_super = 0; 1199 struct ocfs2_super *osb = OCFS2_SB(sb); 1200 1201 mlog_entry_void(); 1202 1203 if (ocfs2_is_hard_readonly(osb)) 1204 goto leave; 1205 1206 status = ocfs2_dlm_init(osb); 1207 if (status < 0) { 1208 mlog_errno(status); 1209 goto leave; 1210 } 1211 1212 status = ocfs2_super_lock(osb, 1); 1213 if (status < 0) { 1214 mlog_errno(status); 1215 goto leave; 1216 } 1217 unlock_super = 1; 1218 1219 /* This will load up the node map and add ourselves to it. */ 1220 status = ocfs2_find_slot(osb); 1221 if (status < 0) { 1222 mlog_errno(status); 1223 goto leave; 1224 } 1225 1226 /* load all node-local system inodes */ 1227 status = ocfs2_init_local_system_inodes(osb); 1228 if (status < 0) { 1229 mlog_errno(status); 1230 goto leave; 1231 } 1232 1233 status = ocfs2_check_volume(osb); 1234 if (status < 0) { 1235 mlog_errno(status); 1236 goto leave; 1237 } 1238 1239 status = ocfs2_truncate_log_init(osb); 1240 if (status < 0) { 1241 mlog_errno(status); 1242 goto leave; 1243 } 1244 1245 if (ocfs2_mount_local(osb)) 1246 goto leave; 1247 1248 leave: 1249 if (unlock_super) 1250 ocfs2_super_unlock(osb, 1); 1251 1252 mlog_exit(status); 1253 return status; 1254 } 1255 1256 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1257 { 1258 int tmp, hangup_needed = 0; 1259 struct ocfs2_super *osb = NULL; 1260 char nodestr[8]; 1261 1262 mlog_entry("(0x%p)\n", sb); 1263 1264 BUG_ON(!sb); 1265 osb = OCFS2_SB(sb); 1266 BUG_ON(!osb); 1267 1268 ocfs2_shutdown_local_alloc(osb); 1269 1270 ocfs2_truncate_log_shutdown(osb); 1271 1272 /* This will disable recovery and flush any recovery work. */ 1273 ocfs2_recovery_exit(osb); 1274 1275 ocfs2_journal_shutdown(osb); 1276 1277 ocfs2_sync_blockdev(sb); 1278 1279 /* No cluster connection means we've failed during mount, so skip 1280 * all the steps which depended on that to complete. */ 1281 if (osb->cconn) { 1282 tmp = ocfs2_super_lock(osb, 1); 1283 if (tmp < 0) { 1284 mlog_errno(tmp); 1285 return; 1286 } 1287 } 1288 1289 if (osb->slot_num != OCFS2_INVALID_SLOT) 1290 ocfs2_put_slot(osb); 1291 1292 if (osb->cconn) 1293 ocfs2_super_unlock(osb, 1); 1294 1295 ocfs2_release_system_inodes(osb); 1296 1297 /* 1298 * If we're dismounting due to mount error, mount.ocfs2 will clean 1299 * up heartbeat. If we're a local mount, there is no heartbeat. 1300 * If we failed before we got a uuid_str yet, we can't stop 1301 * heartbeat. Otherwise, do it. 1302 */ 1303 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1304 hangup_needed = 1; 1305 1306 if (osb->cconn) 1307 ocfs2_dlm_shutdown(osb, hangup_needed); 1308 1309 debugfs_remove(osb->osb_debug_root); 1310 1311 if (hangup_needed) 1312 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1313 1314 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1315 1316 if (ocfs2_mount_local(osb)) 1317 snprintf(nodestr, sizeof(nodestr), "local"); 1318 else 1319 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1320 1321 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1322 osb->dev_str, nodestr); 1323 1324 ocfs2_delete_osb(osb); 1325 kfree(osb); 1326 sb->s_dev = 0; 1327 sb->s_fs_info = NULL; 1328 } 1329 1330 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1331 unsigned uuid_bytes) 1332 { 1333 int i, ret; 1334 char *ptr; 1335 1336 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1337 1338 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1339 if (osb->uuid_str == NULL) 1340 return -ENOMEM; 1341 1342 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1343 /* print with null */ 1344 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1345 if (ret != 2) /* drop super cleans up */ 1346 return -EINVAL; 1347 /* then only advance past the last char */ 1348 ptr += 2; 1349 } 1350 1351 return 0; 1352 } 1353 1354 static int ocfs2_initialize_super(struct super_block *sb, 1355 struct buffer_head *bh, 1356 int sector_size) 1357 { 1358 int status; 1359 int i, cbits, bbits; 1360 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1361 struct inode *inode = NULL; 1362 struct ocfs2_journal *journal; 1363 __le32 uuid_net_key; 1364 struct ocfs2_super *osb; 1365 1366 mlog_entry_void(); 1367 1368 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 1369 if (!osb) { 1370 status = -ENOMEM; 1371 mlog_errno(status); 1372 goto bail; 1373 } 1374 1375 sb->s_fs_info = osb; 1376 sb->s_op = &ocfs2_sops; 1377 sb->s_export_op = &ocfs2_export_ops; 1378 sb->s_time_gran = 1; 1379 sb->s_flags |= MS_NOATIME; 1380 /* this is needed to support O_LARGEFILE */ 1381 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1382 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 1383 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 1384 1385 osb->sb = sb; 1386 /* Save off for ocfs2_rw_direct */ 1387 osb->s_sectsize_bits = blksize_bits(sector_size); 1388 BUG_ON(!osb->s_sectsize_bits); 1389 1390 spin_lock_init(&osb->dc_task_lock); 1391 init_waitqueue_head(&osb->dc_event); 1392 osb->dc_work_sequence = 0; 1393 osb->dc_wake_sequence = 0; 1394 INIT_LIST_HEAD(&osb->blocked_lock_list); 1395 osb->blocked_lock_count = 0; 1396 spin_lock_init(&osb->osb_lock); 1397 ocfs2_init_inode_steal_slot(osb); 1398 1399 atomic_set(&osb->alloc_stats.moves, 0); 1400 atomic_set(&osb->alloc_stats.local_data, 0); 1401 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1402 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1403 atomic_set(&osb->alloc_stats.bg_extends, 0); 1404 1405 ocfs2_init_node_maps(osb); 1406 1407 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1408 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1409 1410 status = ocfs2_recovery_init(osb); 1411 if (status) { 1412 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 1413 mlog_errno(status); 1414 goto bail; 1415 } 1416 1417 init_waitqueue_head(&osb->checkpoint_event); 1418 atomic_set(&osb->needs_checkpoint, 0); 1419 1420 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1421 1422 osb->slot_num = OCFS2_INVALID_SLOT; 1423 1424 osb->local_alloc_state = OCFS2_LA_UNUSED; 1425 osb->local_alloc_bh = NULL; 1426 1427 init_waitqueue_head(&osb->osb_mount_event); 1428 1429 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1430 if (!osb->vol_label) { 1431 mlog(ML_ERROR, "unable to alloc vol label\n"); 1432 status = -ENOMEM; 1433 goto bail; 1434 } 1435 1436 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1437 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1438 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1439 osb->max_slots); 1440 status = -EINVAL; 1441 goto bail; 1442 } 1443 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 1444 1445 init_waitqueue_head(&osb->osb_wipe_event); 1446 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 1447 sizeof(*osb->osb_orphan_wipes), 1448 GFP_KERNEL); 1449 if (!osb->osb_orphan_wipes) { 1450 status = -ENOMEM; 1451 mlog_errno(status); 1452 goto bail; 1453 } 1454 1455 osb->s_feature_compat = 1456 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 1457 osb->s_feature_ro_compat = 1458 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 1459 osb->s_feature_incompat = 1460 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 1461 1462 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 1463 mlog(ML_ERROR, "couldn't mount because of unsupported " 1464 "optional features (%x).\n", i); 1465 status = -EINVAL; 1466 goto bail; 1467 } 1468 if (!(osb->sb->s_flags & MS_RDONLY) && 1469 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 1470 mlog(ML_ERROR, "couldn't mount RDWR because of " 1471 "unsupported optional features (%x).\n", i); 1472 status = -EINVAL; 1473 goto bail; 1474 } 1475 1476 if (ocfs2_userspace_stack(osb)) { 1477 memcpy(osb->osb_cluster_stack, 1478 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 1479 OCFS2_STACK_LABEL_LEN); 1480 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1481 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 1482 mlog(ML_ERROR, 1483 "couldn't mount because of an invalid " 1484 "cluster stack label (%s) \n", 1485 osb->osb_cluster_stack); 1486 status = -EINVAL; 1487 goto bail; 1488 } 1489 } else { 1490 /* The empty string is identical with classic tools that 1491 * don't know about s_cluster_info. */ 1492 osb->osb_cluster_stack[0] = '\0'; 1493 } 1494 1495 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 1496 1497 /* FIXME 1498 * This should be done in ocfs2_journal_init(), but unknown 1499 * ordering issues will cause the filesystem to crash. 1500 * If anyone wants to figure out what part of the code 1501 * refers to osb->journal before ocfs2_journal_init() is run, 1502 * be my guest. 1503 */ 1504 /* initialize our journal structure */ 1505 1506 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 1507 if (!journal) { 1508 mlog(ML_ERROR, "unable to alloc journal\n"); 1509 status = -ENOMEM; 1510 goto bail; 1511 } 1512 osb->journal = journal; 1513 journal->j_osb = osb; 1514 1515 atomic_set(&journal->j_num_trans, 0); 1516 init_rwsem(&journal->j_trans_barrier); 1517 init_waitqueue_head(&journal->j_checkpointed); 1518 spin_lock_init(&journal->j_lock); 1519 journal->j_trans_id = (unsigned long) 1; 1520 INIT_LIST_HEAD(&journal->j_la_cleanups); 1521 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 1522 journal->j_state = OCFS2_JOURNAL_FREE; 1523 1524 /* get some pseudo constants for clustersize bits */ 1525 osb->s_clustersize_bits = 1526 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1527 osb->s_clustersize = 1 << osb->s_clustersize_bits; 1528 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 1529 1530 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 1531 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 1532 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 1533 osb->s_clustersize); 1534 status = -EINVAL; 1535 goto bail; 1536 } 1537 1538 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 1539 > (u32)~0UL) { 1540 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 1541 "what jbd can address in 32 bits.\n"); 1542 status = -EINVAL; 1543 goto bail; 1544 } 1545 1546 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 1547 sizeof(di->id2.i_super.s_uuid))) { 1548 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 1549 status = -ENOMEM; 1550 goto bail; 1551 } 1552 1553 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 1554 1555 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 1556 osb->vol_label[63] = '\0'; 1557 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 1558 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 1559 osb->first_cluster_group_blkno = 1560 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 1561 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 1562 mlog(0, "vol_label: %s\n", osb->vol_label); 1563 mlog(0, "uuid: %s\n", osb->uuid_str); 1564 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 1565 (unsigned long long)osb->root_blkno, 1566 (unsigned long long)osb->system_dir_blkno); 1567 1568 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 1569 if (!osb->osb_dlm_debug) { 1570 status = -ENOMEM; 1571 mlog_errno(status); 1572 goto bail; 1573 } 1574 1575 atomic_set(&osb->vol_state, VOLUME_INIT); 1576 1577 /* load root, system_dir, and all global system inodes */ 1578 status = ocfs2_init_global_system_inodes(osb); 1579 if (status < 0) { 1580 mlog_errno(status); 1581 goto bail; 1582 } 1583 1584 /* 1585 * global bitmap 1586 */ 1587 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 1588 OCFS2_INVALID_SLOT); 1589 if (!inode) { 1590 status = -EINVAL; 1591 mlog_errno(status); 1592 goto bail; 1593 } 1594 1595 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 1596 iput(inode); 1597 1598 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8; 1599 1600 status = ocfs2_init_slot_info(osb); 1601 if (status < 0) { 1602 mlog_errno(status); 1603 goto bail; 1604 } 1605 1606 bail: 1607 mlog_exit(status); 1608 return status; 1609 } 1610 1611 /* 1612 * will return: -EAGAIN if it is ok to keep searching for superblocks 1613 * -EINVAL if there is a bad superblock 1614 * 0 on success 1615 */ 1616 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 1617 struct buffer_head *bh, 1618 u32 blksz) 1619 { 1620 int status = -EAGAIN; 1621 1622 mlog_entry_void(); 1623 1624 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 1625 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 1626 status = -EINVAL; 1627 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 1628 mlog(ML_ERROR, "found superblock with incorrect block " 1629 "size: found %u, should be %u\n", 1630 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 1631 blksz); 1632 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 1633 OCFS2_MAJOR_REV_LEVEL || 1634 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 1635 OCFS2_MINOR_REV_LEVEL) { 1636 mlog(ML_ERROR, "found superblock with bad version: " 1637 "found %u.%u, should be %u.%u\n", 1638 le16_to_cpu(di->id2.i_super.s_major_rev_level), 1639 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 1640 OCFS2_MAJOR_REV_LEVEL, 1641 OCFS2_MINOR_REV_LEVEL); 1642 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 1643 mlog(ML_ERROR, "bad block number on superblock: " 1644 "found %llu, should be %llu\n", 1645 (unsigned long long)le64_to_cpu(di->i_blkno), 1646 (unsigned long long)bh->b_blocknr); 1647 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 1648 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 1649 mlog(ML_ERROR, "bad cluster size found: %u\n", 1650 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 1651 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 1652 mlog(ML_ERROR, "bad root_blkno: 0\n"); 1653 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 1654 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 1655 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 1656 mlog(ML_ERROR, 1657 "Superblock slots found greater than file system " 1658 "maximum: found %u, max %u\n", 1659 le16_to_cpu(di->id2.i_super.s_max_slots), 1660 OCFS2_MAX_SLOTS); 1661 } else { 1662 /* found it! */ 1663 status = 0; 1664 } 1665 } 1666 1667 mlog_exit(status); 1668 return status; 1669 } 1670 1671 static int ocfs2_check_volume(struct ocfs2_super *osb) 1672 { 1673 int status; 1674 int dirty; 1675 int local; 1676 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 1677 * recover 1678 * ourselves. */ 1679 1680 mlog_entry_void(); 1681 1682 /* Init our journal object. */ 1683 status = ocfs2_journal_init(osb->journal, &dirty); 1684 if (status < 0) { 1685 mlog(ML_ERROR, "Could not initialize journal!\n"); 1686 goto finally; 1687 } 1688 1689 /* If the journal was unmounted cleanly then we don't want to 1690 * recover anything. Otherwise, journal_load will do that 1691 * dirty work for us :) */ 1692 if (!dirty) { 1693 status = ocfs2_journal_wipe(osb->journal, 0); 1694 if (status < 0) { 1695 mlog_errno(status); 1696 goto finally; 1697 } 1698 } else { 1699 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 1700 "recovering volume.\n"); 1701 } 1702 1703 local = ocfs2_mount_local(osb); 1704 1705 /* will play back anything left in the journal. */ 1706 status = ocfs2_journal_load(osb->journal, local); 1707 if (status < 0) { 1708 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 1709 goto finally; 1710 } 1711 1712 if (dirty) { 1713 /* recover my local alloc if we didn't unmount cleanly. */ 1714 status = ocfs2_begin_local_alloc_recovery(osb, 1715 osb->slot_num, 1716 &local_alloc); 1717 if (status < 0) { 1718 mlog_errno(status); 1719 goto finally; 1720 } 1721 /* we complete the recovery process after we've marked 1722 * ourselves as mounted. */ 1723 } 1724 1725 mlog(0, "Journal loaded.\n"); 1726 1727 status = ocfs2_load_local_alloc(osb); 1728 if (status < 0) { 1729 mlog_errno(status); 1730 goto finally; 1731 } 1732 1733 if (dirty) { 1734 /* Recovery will be completed after we've mounted the 1735 * rest of the volume. */ 1736 osb->dirty = 1; 1737 osb->local_alloc_copy = local_alloc; 1738 local_alloc = NULL; 1739 } 1740 1741 /* go through each journal, trylock it and if you get the 1742 * lock, and it's marked as dirty, set the bit in the recover 1743 * map and launch a recovery thread for it. */ 1744 status = ocfs2_mark_dead_nodes(osb); 1745 if (status < 0) 1746 mlog_errno(status); 1747 1748 finally: 1749 if (local_alloc) 1750 kfree(local_alloc); 1751 1752 mlog_exit(status); 1753 return status; 1754 } 1755 1756 /* 1757 * The routine gets called from dismount or close whenever a dismount on 1758 * volume is requested and the osb open count becomes 1. 1759 * It will remove the osb from the global list and also free up all the 1760 * initialized resources and fileobject. 1761 */ 1762 static void ocfs2_delete_osb(struct ocfs2_super *osb) 1763 { 1764 mlog_entry_void(); 1765 1766 /* This function assumes that the caller has the main osb resource */ 1767 1768 ocfs2_free_slot_info(osb); 1769 1770 kfree(osb->osb_orphan_wipes); 1771 /* FIXME 1772 * This belongs in journal shutdown, but because we have to 1773 * allocate osb->journal at the start of ocfs2_initalize_osb(), 1774 * we free it here. 1775 */ 1776 kfree(osb->journal); 1777 if (osb->local_alloc_copy) 1778 kfree(osb->local_alloc_copy); 1779 kfree(osb->uuid_str); 1780 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 1781 memset(osb, 0, sizeof(struct ocfs2_super)); 1782 1783 mlog_exit_void(); 1784 } 1785 1786 /* Put OCFS2 into a readonly state, or (if the user specifies it), 1787 * panic(). We do not support continue-on-error operation. */ 1788 static void ocfs2_handle_error(struct super_block *sb) 1789 { 1790 struct ocfs2_super *osb = OCFS2_SB(sb); 1791 1792 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 1793 panic("OCFS2: (device %s): panic forced after error\n", 1794 sb->s_id); 1795 1796 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 1797 1798 if (sb->s_flags & MS_RDONLY && 1799 (ocfs2_is_soft_readonly(osb) || 1800 ocfs2_is_hard_readonly(osb))) 1801 return; 1802 1803 printk(KERN_CRIT "File system is now read-only due to the potential " 1804 "of on-disk corruption. Please run fsck.ocfs2 once the file " 1805 "system is unmounted.\n"); 1806 sb->s_flags |= MS_RDONLY; 1807 ocfs2_set_ro_flag(osb, 0); 1808 } 1809 1810 static char error_buf[1024]; 1811 1812 void __ocfs2_error(struct super_block *sb, 1813 const char *function, 1814 const char *fmt, ...) 1815 { 1816 va_list args; 1817 1818 va_start(args, fmt); 1819 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1820 va_end(args); 1821 1822 /* Not using mlog here because we want to show the actual 1823 * function the error came from. */ 1824 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 1825 sb->s_id, function, error_buf); 1826 1827 ocfs2_handle_error(sb); 1828 } 1829 1830 /* Handle critical errors. This is intentionally more drastic than 1831 * ocfs2_handle_error, so we only use for things like journal errors, 1832 * etc. */ 1833 void __ocfs2_abort(struct super_block* sb, 1834 const char *function, 1835 const char *fmt, ...) 1836 { 1837 va_list args; 1838 1839 va_start(args, fmt); 1840 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1841 va_end(args); 1842 1843 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 1844 sb->s_id, function, error_buf); 1845 1846 /* We don't have the cluster support yet to go straight to 1847 * hard readonly in here. Until then, we want to keep 1848 * ocfs2_abort() so that we can at least mark critical 1849 * errors. 1850 * 1851 * TODO: This should abort the journal and alert other nodes 1852 * that our slot needs recovery. */ 1853 1854 /* Force a panic(). This stinks, but it's better than letting 1855 * things continue without having a proper hard readonly 1856 * here. */ 1857 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1858 ocfs2_handle_error(sb); 1859 } 1860 1861 module_init(ocfs2_init); 1862 module_exit(ocfs2_exit); 1863