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 43 #include <cluster/nodemanager.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 #include "vote.h" 68 69 #include "buffer_head_io.h" 70 71 static kmem_cache_t *ocfs2_inode_cachep = NULL; 72 73 kmem_cache_t *ocfs2_lock_cache = NULL; 74 75 /* OCFS2 needs to schedule several differnt types of work which 76 * require cluster locking, disk I/O, recovery waits, etc. Since these 77 * types of work tend to be heavy we avoid using the kernel events 78 * workqueue and schedule on our own. */ 79 struct workqueue_struct *ocfs2_wq = NULL; 80 81 static struct dentry *ocfs2_debugfs_root = NULL; 82 83 MODULE_AUTHOR("Oracle"); 84 MODULE_LICENSE("GPL"); 85 86 static int ocfs2_parse_options(struct super_block *sb, char *options, 87 unsigned long *mount_opt, int is_remount); 88 static void ocfs2_put_super(struct super_block *sb); 89 static int ocfs2_mount_volume(struct super_block *sb); 90 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 91 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 92 static int ocfs2_initialize_mem_caches(void); 93 static void ocfs2_free_mem_caches(void); 94 static void ocfs2_delete_osb(struct ocfs2_super *osb); 95 96 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 97 98 static int ocfs2_sync_fs(struct super_block *sb, int wait); 99 100 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 101 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 102 static int ocfs2_release_system_inodes(struct ocfs2_super *osb); 103 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb); 104 static int ocfs2_check_volume(struct ocfs2_super *osb); 105 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 106 struct buffer_head *bh, 107 u32 sectsize); 108 static int ocfs2_initialize_super(struct super_block *sb, 109 struct buffer_head *bh, 110 int sector_size); 111 static int ocfs2_get_sector(struct super_block *sb, 112 struct buffer_head **bh, 113 int block, 114 int sect_size); 115 static void ocfs2_write_super(struct super_block *sb); 116 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 117 static void ocfs2_destroy_inode(struct inode *inode); 118 119 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift); 120 121 static struct super_operations ocfs2_sops = { 122 .statfs = ocfs2_statfs, 123 .alloc_inode = ocfs2_alloc_inode, 124 .destroy_inode = ocfs2_destroy_inode, 125 .drop_inode = ocfs2_drop_inode, 126 .clear_inode = ocfs2_clear_inode, 127 .delete_inode = ocfs2_delete_inode, 128 .sync_fs = ocfs2_sync_fs, 129 .write_super = ocfs2_write_super, 130 .put_super = ocfs2_put_super, 131 .remount_fs = ocfs2_remount, 132 }; 133 134 enum { 135 Opt_barrier, 136 Opt_err_panic, 137 Opt_err_ro, 138 Opt_intr, 139 Opt_nointr, 140 Opt_hb_none, 141 Opt_hb_local, 142 Opt_data_ordered, 143 Opt_data_writeback, 144 Opt_err, 145 }; 146 147 static match_table_t tokens = { 148 {Opt_barrier, "barrier=%u"}, 149 {Opt_err_panic, "errors=panic"}, 150 {Opt_err_ro, "errors=remount-ro"}, 151 {Opt_intr, "intr"}, 152 {Opt_nointr, "nointr"}, 153 {Opt_hb_none, OCFS2_HB_NONE}, 154 {Opt_hb_local, OCFS2_HB_LOCAL}, 155 {Opt_data_ordered, "data=ordered"}, 156 {Opt_data_writeback, "data=writeback"}, 157 {Opt_err, NULL} 158 }; 159 160 /* 161 * write_super and sync_fs ripped right out of ext3. 162 */ 163 static void ocfs2_write_super(struct super_block *sb) 164 { 165 if (mutex_trylock(&sb->s_lock) != 0) 166 BUG(); 167 sb->s_dirt = 0; 168 } 169 170 static int ocfs2_sync_fs(struct super_block *sb, int wait) 171 { 172 int status = 0; 173 tid_t target; 174 struct ocfs2_super *osb = OCFS2_SB(sb); 175 176 sb->s_dirt = 0; 177 178 if (ocfs2_is_hard_readonly(osb)) 179 return -EROFS; 180 181 if (wait) { 182 status = ocfs2_flush_truncate_log(osb); 183 if (status < 0) 184 mlog_errno(status); 185 } else { 186 ocfs2_schedule_truncate_log_flush(osb, 0); 187 } 188 189 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) { 190 if (wait) 191 log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 192 target); 193 } 194 return 0; 195 } 196 197 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 198 { 199 struct inode *new = NULL; 200 int status = 0; 201 int i; 202 203 mlog_entry_void(); 204 205 new = ocfs2_iget(osb, osb->root_blkno); 206 if (IS_ERR(new)) { 207 status = PTR_ERR(new); 208 mlog_errno(status); 209 goto bail; 210 } 211 osb->root_inode = new; 212 213 new = ocfs2_iget(osb, osb->system_dir_blkno); 214 if (IS_ERR(new)) { 215 status = PTR_ERR(new); 216 mlog_errno(status); 217 goto bail; 218 } 219 osb->sys_root_inode = new; 220 221 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 222 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 223 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 224 if (!new) { 225 ocfs2_release_system_inodes(osb); 226 status = -EINVAL; 227 mlog_errno(status); 228 /* FIXME: Should ERROR_RO_FS */ 229 mlog(ML_ERROR, "Unable to load system inode %d, " 230 "possibly corrupt fs?", i); 231 goto bail; 232 } 233 // the array now has one ref, so drop this one 234 iput(new); 235 } 236 237 bail: 238 mlog_exit(status); 239 return status; 240 } 241 242 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 243 { 244 struct inode *new = NULL; 245 int status = 0; 246 int i; 247 248 mlog_entry_void(); 249 250 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 251 i < NUM_SYSTEM_INODES; 252 i++) { 253 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 254 if (!new) { 255 ocfs2_release_system_inodes(osb); 256 status = -EINVAL; 257 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 258 status, i, osb->slot_num); 259 goto bail; 260 } 261 /* the array now has one ref, so drop this one */ 262 iput(new); 263 } 264 265 bail: 266 mlog_exit(status); 267 return status; 268 } 269 270 static int ocfs2_release_system_inodes(struct ocfs2_super *osb) 271 { 272 int status = 0, i; 273 struct inode *inode; 274 275 mlog_entry_void(); 276 277 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 278 inode = osb->system_inodes[i]; 279 if (inode) { 280 iput(inode); 281 osb->system_inodes[i] = NULL; 282 } 283 } 284 285 inode = osb->sys_root_inode; 286 if (inode) { 287 iput(inode); 288 osb->sys_root_inode = NULL; 289 } 290 291 inode = osb->root_inode; 292 if (inode) { 293 iput(inode); 294 osb->root_inode = NULL; 295 } 296 297 mlog_exit(status); 298 return status; 299 } 300 301 /* We're allocating fs objects, use GFP_NOFS */ 302 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 303 { 304 struct ocfs2_inode_info *oi; 305 306 oi = kmem_cache_alloc(ocfs2_inode_cachep, SLAB_NOFS); 307 if (!oi) 308 return NULL; 309 310 return &oi->vfs_inode; 311 } 312 313 static void ocfs2_destroy_inode(struct inode *inode) 314 { 315 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 316 } 317 318 /* From xfs_super.c:xfs_max_file_offset 319 * Copyright (c) 2000-2004 Silicon Graphics, Inc. 320 */ 321 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift) 322 { 323 unsigned int pagefactor = 1; 324 unsigned int bitshift = BITS_PER_LONG - 1; 325 326 /* Figure out maximum filesize, on Linux this can depend on 327 * the filesystem blocksize (on 32 bit platforms). 328 * __block_prepare_write does this in an [unsigned] long... 329 * page->index << (PAGE_CACHE_SHIFT - bbits) 330 * So, for page sized blocks (4K on 32 bit platforms), 331 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 332 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 333 * but for smaller blocksizes it is less (bbits = log2 bsize). 334 * Note1: get_block_t takes a long (implicit cast from above) 335 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 336 * can optionally convert the [unsigned] long from above into 337 * an [unsigned] long long. 338 */ 339 340 #if BITS_PER_LONG == 32 341 # if defined(CONFIG_LBD) 342 BUG_ON(sizeof(sector_t) != 8); 343 pagefactor = PAGE_CACHE_SIZE; 344 bitshift = BITS_PER_LONG; 345 # else 346 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 347 # endif 348 #endif 349 350 return (((unsigned long long)pagefactor) << bitshift) - 1; 351 } 352 353 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 354 { 355 int incompat_features; 356 int ret = 0; 357 unsigned long parsed_options; 358 struct ocfs2_super *osb = OCFS2_SB(sb); 359 360 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 361 ret = -EINVAL; 362 goto out; 363 } 364 365 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 366 (parsed_options & OCFS2_MOUNT_HB_LOCAL)) { 367 ret = -EINVAL; 368 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 369 goto out; 370 } 371 372 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 373 (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) { 374 ret = -EINVAL; 375 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 376 goto out; 377 } 378 379 /* We're going to/from readonly mode. */ 380 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 381 /* Lock here so the check of HARD_RO and the potential 382 * setting of SOFT_RO is atomic. */ 383 spin_lock(&osb->osb_lock); 384 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 385 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 386 ret = -EROFS; 387 goto unlock_osb; 388 } 389 390 if (*flags & MS_RDONLY) { 391 mlog(0, "Going to ro mode.\n"); 392 sb->s_flags |= MS_RDONLY; 393 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 394 } else { 395 mlog(0, "Making ro filesystem writeable.\n"); 396 397 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 398 mlog(ML_ERROR, "Cannot remount RDWR " 399 "filesystem due to previous errors.\n"); 400 ret = -EROFS; 401 goto unlock_osb; 402 } 403 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 404 if (incompat_features) { 405 mlog(ML_ERROR, "Cannot remount RDWR because " 406 "of unsupported optional features " 407 "(%x).\n", incompat_features); 408 ret = -EINVAL; 409 goto unlock_osb; 410 } 411 sb->s_flags &= ~MS_RDONLY; 412 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 413 } 414 unlock_osb: 415 spin_unlock(&osb->osb_lock); 416 } 417 418 if (!ret) { 419 if (!ocfs2_is_hard_readonly(osb)) 420 ocfs2_set_journal_params(osb); 421 422 /* Only save off the new mount options in case of a successful 423 * remount. */ 424 osb->s_mount_opt = parsed_options; 425 } 426 out: 427 return ret; 428 } 429 430 static int ocfs2_sb_probe(struct super_block *sb, 431 struct buffer_head **bh, 432 int *sector_size) 433 { 434 int status = 0, tmpstat; 435 struct ocfs1_vol_disk_hdr *hdr; 436 struct ocfs2_dinode *di; 437 int blksize; 438 439 *bh = NULL; 440 441 /* may be > 512 */ 442 *sector_size = bdev_hardsect_size(sb->s_bdev); 443 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 444 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 445 *sector_size, OCFS2_MAX_BLOCKSIZE); 446 status = -EINVAL; 447 goto bail; 448 } 449 450 /* Can this really happen? */ 451 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 452 *sector_size = OCFS2_MIN_BLOCKSIZE; 453 454 /* check block zero for old format */ 455 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 456 if (status < 0) { 457 mlog_errno(status); 458 goto bail; 459 } 460 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 461 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 462 mlog(ML_ERROR, "incompatible version: %u.%u\n", 463 hdr->major_version, hdr->minor_version); 464 status = -EINVAL; 465 } 466 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 467 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 468 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 469 hdr->signature); 470 status = -EINVAL; 471 } 472 brelse(*bh); 473 *bh = NULL; 474 if (status < 0) { 475 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 476 "upgraded before mounting with ocfs v2\n"); 477 goto bail; 478 } 479 480 /* 481 * Now check at magic offset for 512, 1024, 2048, 4096 482 * blocksizes. 4096 is the maximum blocksize because it is 483 * the minimum clustersize. 484 */ 485 status = -EINVAL; 486 for (blksize = *sector_size; 487 blksize <= OCFS2_MAX_BLOCKSIZE; 488 blksize <<= 1) { 489 tmpstat = ocfs2_get_sector(sb, bh, 490 OCFS2_SUPER_BLOCK_BLKNO, 491 blksize); 492 if (tmpstat < 0) { 493 status = tmpstat; 494 mlog_errno(status); 495 goto bail; 496 } 497 di = (struct ocfs2_dinode *) (*bh)->b_data; 498 status = ocfs2_verify_volume(di, *bh, blksize); 499 if (status >= 0) 500 goto bail; 501 brelse(*bh); 502 *bh = NULL; 503 if (status != -EAGAIN) 504 break; 505 } 506 507 bail: 508 return status; 509 } 510 511 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 512 { 513 struct dentry *root; 514 int status, sector_size; 515 unsigned long parsed_opt; 516 struct inode *inode = NULL; 517 struct ocfs2_super *osb = NULL; 518 struct buffer_head *bh = NULL; 519 520 mlog_entry("%p, %p, %i", sb, data, silent); 521 522 /* for now we only have one cluster/node, make sure we see it 523 * in the heartbeat universe */ 524 if (!o2hb_check_local_node_heartbeating()) { 525 status = -EINVAL; 526 goto read_super_error; 527 } 528 529 /* probe for superblock */ 530 status = ocfs2_sb_probe(sb, &bh, §or_size); 531 if (status < 0) { 532 mlog(ML_ERROR, "superblock probe failed!\n"); 533 goto read_super_error; 534 } 535 536 status = ocfs2_initialize_super(sb, bh, sector_size); 537 osb = OCFS2_SB(sb); 538 if (status < 0) { 539 mlog_errno(status); 540 goto read_super_error; 541 } 542 brelse(bh); 543 bh = NULL; 544 545 if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) { 546 status = -EINVAL; 547 goto read_super_error; 548 } 549 osb->s_mount_opt = parsed_opt; 550 551 sb->s_magic = OCFS2_SUPER_MAGIC; 552 553 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 554 * heartbeat=none */ 555 if (bdev_read_only(sb->s_bdev)) { 556 if (!(sb->s_flags & MS_RDONLY)) { 557 status = -EACCES; 558 mlog(ML_ERROR, "Readonly device detected but readonly " 559 "mount was not specified.\n"); 560 goto read_super_error; 561 } 562 563 /* You should not be able to start a local heartbeat 564 * on a readonly device. */ 565 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 566 status = -EROFS; 567 mlog(ML_ERROR, "Local heartbeat specified on readonly " 568 "device.\n"); 569 goto read_super_error; 570 } 571 572 status = ocfs2_check_journals_nolocks(osb); 573 if (status < 0) { 574 if (status == -EROFS) 575 mlog(ML_ERROR, "Recovery required on readonly " 576 "file system, but write access is " 577 "unavailable.\n"); 578 else 579 mlog_errno(status); 580 goto read_super_error; 581 } 582 583 ocfs2_set_ro_flag(osb, 1); 584 585 printk(KERN_NOTICE "Readonly device detected. No cluster " 586 "services will be utilized for this mount. Recovery " 587 "will be skipped.\n"); 588 } 589 590 if (!ocfs2_is_hard_readonly(osb)) { 591 /* If this isn't a hard readonly mount, then we need 592 * to make sure that heartbeat is in a valid state, 593 * and that we mark ourselves soft readonly is -oro 594 * was specified. */ 595 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 596 mlog(ML_ERROR, "No heartbeat for device (%s)\n", 597 sb->s_id); 598 status = -EINVAL; 599 goto read_super_error; 600 } 601 602 if (sb->s_flags & MS_RDONLY) 603 ocfs2_set_ro_flag(osb, 0); 604 } 605 606 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 607 ocfs2_debugfs_root); 608 if (!osb->osb_debug_root) { 609 status = -EINVAL; 610 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 611 goto read_super_error; 612 } 613 614 status = ocfs2_mount_volume(sb); 615 if (osb->root_inode) 616 inode = igrab(osb->root_inode); 617 618 if (status < 0) 619 goto read_super_error; 620 621 if (!inode) { 622 status = -EIO; 623 mlog_errno(status); 624 goto read_super_error; 625 } 626 627 root = d_alloc_root(inode); 628 if (!root) { 629 status = -ENOMEM; 630 mlog_errno(status); 631 goto read_super_error; 632 } 633 634 sb->s_root = root; 635 636 ocfs2_complete_mount_recovery(osb); 637 638 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %d, slot %d) " 639 "with %s data mode.\n", 640 osb->dev_str, osb->node_num, osb->slot_num, 641 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 642 "ordered"); 643 644 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 645 wake_up(&osb->osb_mount_event); 646 647 mlog_exit(status); 648 return status; 649 650 read_super_error: 651 if (bh != NULL) 652 brelse(bh); 653 654 if (inode) 655 iput(inode); 656 657 if (osb) { 658 atomic_set(&osb->vol_state, VOLUME_DISABLED); 659 wake_up(&osb->osb_mount_event); 660 ocfs2_dismount_volume(sb, 1); 661 } 662 663 mlog_exit(status); 664 return status; 665 } 666 667 static int ocfs2_get_sb(struct file_system_type *fs_type, 668 int flags, 669 const char *dev_name, 670 void *data, 671 struct vfsmount *mnt) 672 { 673 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 674 mnt); 675 } 676 677 static struct file_system_type ocfs2_fs_type = { 678 .owner = THIS_MODULE, 679 .name = "ocfs2", 680 .get_sb = ocfs2_get_sb, /* is this called when we mount 681 * the fs? */ 682 .kill_sb = kill_block_super, /* set to the generic one 683 * right now, but do we 684 * need to change that? */ 685 .fs_flags = FS_REQUIRES_DEV, 686 .next = NULL 687 }; 688 689 static int ocfs2_parse_options(struct super_block *sb, 690 char *options, 691 unsigned long *mount_opt, 692 int is_remount) 693 { 694 int status; 695 char *p; 696 697 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 698 options ? options : "(none)"); 699 700 *mount_opt = 0; 701 702 if (!options) { 703 status = 1; 704 goto bail; 705 } 706 707 while ((p = strsep(&options, ",")) != NULL) { 708 int token, option; 709 substring_t args[MAX_OPT_ARGS]; 710 711 if (!*p) 712 continue; 713 714 token = match_token(p, tokens, args); 715 switch (token) { 716 case Opt_hb_local: 717 *mount_opt |= OCFS2_MOUNT_HB_LOCAL; 718 break; 719 case Opt_hb_none: 720 *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 721 break; 722 case Opt_barrier: 723 if (match_int(&args[0], &option)) { 724 status = 0; 725 goto bail; 726 } 727 if (option) 728 *mount_opt |= OCFS2_MOUNT_BARRIER; 729 else 730 *mount_opt &= ~OCFS2_MOUNT_BARRIER; 731 break; 732 case Opt_intr: 733 *mount_opt &= ~OCFS2_MOUNT_NOINTR; 734 break; 735 case Opt_nointr: 736 *mount_opt |= OCFS2_MOUNT_NOINTR; 737 break; 738 case Opt_err_panic: 739 *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 740 break; 741 case Opt_err_ro: 742 *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 743 break; 744 case Opt_data_ordered: 745 *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 746 break; 747 case Opt_data_writeback: 748 *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 749 break; 750 default: 751 mlog(ML_ERROR, 752 "Unrecognized mount option \"%s\" " 753 "or missing value\n", p); 754 status = 0; 755 goto bail; 756 } 757 } 758 759 status = 1; 760 761 bail: 762 mlog_exit(status); 763 return status; 764 } 765 766 static int __init ocfs2_init(void) 767 { 768 int status; 769 770 mlog_entry_void(); 771 772 ocfs2_print_version(); 773 774 if (init_ocfs2_extent_maps()) 775 return -ENOMEM; 776 777 status = init_ocfs2_uptodate_cache(); 778 if (status < 0) { 779 mlog_errno(status); 780 goto leave; 781 } 782 783 status = ocfs2_initialize_mem_caches(); 784 if (status < 0) { 785 mlog_errno(status); 786 goto leave; 787 } 788 789 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 790 if (!ocfs2_wq) { 791 status = -ENOMEM; 792 goto leave; 793 } 794 795 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 796 if (!ocfs2_debugfs_root) { 797 status = -EFAULT; 798 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 799 } 800 801 leave: 802 if (status < 0) { 803 ocfs2_free_mem_caches(); 804 exit_ocfs2_uptodate_cache(); 805 exit_ocfs2_extent_maps(); 806 } 807 808 mlog_exit(status); 809 810 if (status >= 0) { 811 return register_filesystem(&ocfs2_fs_type); 812 } else 813 return -1; 814 } 815 816 static void __exit ocfs2_exit(void) 817 { 818 mlog_entry_void(); 819 820 if (ocfs2_wq) { 821 flush_workqueue(ocfs2_wq); 822 destroy_workqueue(ocfs2_wq); 823 } 824 825 debugfs_remove(ocfs2_debugfs_root); 826 827 ocfs2_free_mem_caches(); 828 829 unregister_filesystem(&ocfs2_fs_type); 830 831 exit_ocfs2_extent_maps(); 832 833 exit_ocfs2_uptodate_cache(); 834 835 mlog_exit_void(); 836 } 837 838 static void ocfs2_put_super(struct super_block *sb) 839 { 840 mlog_entry("(0x%p)\n", sb); 841 842 ocfs2_sync_blockdev(sb); 843 ocfs2_dismount_volume(sb, 0); 844 845 mlog_exit_void(); 846 } 847 848 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 849 { 850 struct ocfs2_super *osb; 851 u32 numbits, freebits; 852 int status; 853 struct ocfs2_dinode *bm_lock; 854 struct buffer_head *bh = NULL; 855 struct inode *inode = NULL; 856 857 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 858 859 osb = OCFS2_SB(dentry->d_sb); 860 861 inode = ocfs2_get_system_file_inode(osb, 862 GLOBAL_BITMAP_SYSTEM_INODE, 863 OCFS2_INVALID_SLOT); 864 if (!inode) { 865 mlog(ML_ERROR, "failed to get bitmap inode\n"); 866 status = -EIO; 867 goto bail; 868 } 869 870 status = ocfs2_meta_lock(inode, NULL, &bh, 0); 871 if (status < 0) { 872 mlog_errno(status); 873 goto bail; 874 } 875 876 bm_lock = (struct ocfs2_dinode *) bh->b_data; 877 878 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 879 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 880 881 buf->f_type = OCFS2_SUPER_MAGIC; 882 buf->f_bsize = dentry->d_sb->s_blocksize; 883 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 884 buf->f_blocks = ((sector_t) numbits) * 885 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 886 buf->f_bfree = ((sector_t) freebits) * 887 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 888 buf->f_bavail = buf->f_bfree; 889 buf->f_files = numbits; 890 buf->f_ffree = freebits; 891 892 brelse(bh); 893 894 ocfs2_meta_unlock(inode, 0); 895 status = 0; 896 bail: 897 if (inode) 898 iput(inode); 899 900 mlog_exit(status); 901 902 return status; 903 } 904 905 static void ocfs2_inode_init_once(void *data, 906 kmem_cache_t *cachep, 907 unsigned long flags) 908 { 909 struct ocfs2_inode_info *oi = data; 910 911 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 912 SLAB_CTOR_CONSTRUCTOR) { 913 oi->ip_flags = 0; 914 oi->ip_open_count = 0; 915 spin_lock_init(&oi->ip_lock); 916 ocfs2_extent_map_init(&oi->vfs_inode); 917 INIT_LIST_HEAD(&oi->ip_handle_list); 918 INIT_LIST_HEAD(&oi->ip_io_markers); 919 oi->ip_handle = NULL; 920 oi->ip_created_trans = 0; 921 oi->ip_last_trans = 0; 922 oi->ip_dir_start_lookup = 0; 923 924 init_rwsem(&oi->ip_alloc_sem); 925 mutex_init(&oi->ip_io_mutex); 926 927 oi->ip_blkno = 0ULL; 928 oi->ip_clusters = 0; 929 930 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 931 ocfs2_lock_res_init_once(&oi->ip_meta_lockres); 932 ocfs2_lock_res_init_once(&oi->ip_data_lockres); 933 934 ocfs2_metadata_cache_init(&oi->vfs_inode); 935 936 inode_init_once(&oi->vfs_inode); 937 } 938 } 939 940 static int ocfs2_initialize_mem_caches(void) 941 { 942 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 943 sizeof(struct ocfs2_inode_info), 944 0, 945 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 946 SLAB_MEM_SPREAD), 947 ocfs2_inode_init_once, NULL); 948 if (!ocfs2_inode_cachep) 949 return -ENOMEM; 950 951 ocfs2_lock_cache = kmem_cache_create("ocfs2_lock", 952 sizeof(struct ocfs2_journal_lock), 953 0, 954 SLAB_HWCACHE_ALIGN, 955 NULL, NULL); 956 if (!ocfs2_lock_cache) 957 return -ENOMEM; 958 959 return 0; 960 } 961 962 static void ocfs2_free_mem_caches(void) 963 { 964 if (ocfs2_inode_cachep) 965 kmem_cache_destroy(ocfs2_inode_cachep); 966 if (ocfs2_lock_cache) 967 kmem_cache_destroy(ocfs2_lock_cache); 968 969 ocfs2_inode_cachep = NULL; 970 ocfs2_lock_cache = NULL; 971 } 972 973 static int ocfs2_get_sector(struct super_block *sb, 974 struct buffer_head **bh, 975 int block, 976 int sect_size) 977 { 978 if (!sb_set_blocksize(sb, sect_size)) { 979 mlog(ML_ERROR, "unable to set blocksize\n"); 980 return -EIO; 981 } 982 983 *bh = sb_getblk(sb, block); 984 if (!*bh) { 985 mlog_errno(-EIO); 986 return -EIO; 987 } 988 lock_buffer(*bh); 989 if (!buffer_dirty(*bh)) 990 clear_buffer_uptodate(*bh); 991 unlock_buffer(*bh); 992 ll_rw_block(READ, 1, bh); 993 wait_on_buffer(*bh); 994 return 0; 995 } 996 997 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */ 998 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) 999 { 1000 int status; 1001 1002 /* XXX hold a ref on the node while mounte? easy enough, if 1003 * desirable. */ 1004 osb->node_num = o2nm_this_node(); 1005 if (osb->node_num == O2NM_MAX_NODES) { 1006 mlog(ML_ERROR, "could not find this host's node number\n"); 1007 status = -ENOENT; 1008 goto bail; 1009 } 1010 1011 mlog(0, "I am node %d\n", osb->node_num); 1012 1013 status = 0; 1014 bail: 1015 return status; 1016 } 1017 1018 static int ocfs2_mount_volume(struct super_block *sb) 1019 { 1020 int status = 0; 1021 int unlock_super = 0; 1022 struct ocfs2_super *osb = OCFS2_SB(sb); 1023 1024 mlog_entry_void(); 1025 1026 if (ocfs2_is_hard_readonly(osb)) 1027 goto leave; 1028 1029 status = ocfs2_fill_local_node_info(osb); 1030 if (status < 0) { 1031 mlog_errno(status); 1032 goto leave; 1033 } 1034 1035 status = ocfs2_register_hb_callbacks(osb); 1036 if (status < 0) { 1037 mlog_errno(status); 1038 goto leave; 1039 } 1040 1041 status = ocfs2_dlm_init(osb); 1042 if (status < 0) { 1043 mlog_errno(status); 1044 goto leave; 1045 } 1046 1047 /* requires vote_thread to be running. */ 1048 status = ocfs2_register_net_handlers(osb); 1049 if (status < 0) { 1050 mlog_errno(status); 1051 goto leave; 1052 } 1053 1054 status = ocfs2_super_lock(osb, 1); 1055 if (status < 0) { 1056 mlog_errno(status); 1057 goto leave; 1058 } 1059 unlock_super = 1; 1060 1061 /* This will load up the node map and add ourselves to it. */ 1062 status = ocfs2_find_slot(osb); 1063 if (status < 0) { 1064 mlog_errno(status); 1065 goto leave; 1066 } 1067 1068 ocfs2_populate_mounted_map(osb); 1069 1070 /* load all node-local system inodes */ 1071 status = ocfs2_init_local_system_inodes(osb); 1072 if (status < 0) { 1073 mlog_errno(status); 1074 goto leave; 1075 } 1076 1077 status = ocfs2_check_volume(osb); 1078 if (status < 0) { 1079 mlog_errno(status); 1080 goto leave; 1081 } 1082 1083 status = ocfs2_truncate_log_init(osb); 1084 if (status < 0) { 1085 mlog_errno(status); 1086 goto leave; 1087 } 1088 1089 /* This should be sent *after* we recovered our journal as it 1090 * will cause other nodes to unmark us as needing 1091 * recovery. However, we need to send it *before* dropping the 1092 * super block lock as otherwise their recovery threads might 1093 * try to clean us up while we're live! */ 1094 status = ocfs2_request_mount_vote(osb); 1095 if (status < 0) 1096 mlog_errno(status); 1097 1098 leave: 1099 if (unlock_super) 1100 ocfs2_super_unlock(osb, 1); 1101 1102 mlog_exit(status); 1103 return status; 1104 } 1105 1106 /* we can't grab the goofy sem lock from inside wait_event, so we use 1107 * memory barriers to make sure that we'll see the null task before 1108 * being woken up */ 1109 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) 1110 { 1111 mb(); 1112 return osb->recovery_thread_task != NULL; 1113 } 1114 1115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1116 { 1117 int tmp; 1118 struct ocfs2_super *osb = NULL; 1119 1120 mlog_entry("(0x%p)\n", sb); 1121 1122 BUG_ON(!sb); 1123 osb = OCFS2_SB(sb); 1124 BUG_ON(!osb); 1125 1126 ocfs2_shutdown_local_alloc(osb); 1127 1128 ocfs2_truncate_log_shutdown(osb); 1129 1130 /* disable any new recovery threads and wait for any currently 1131 * running ones to exit. Do this before setting the vol_state. */ 1132 mutex_lock(&osb->recovery_lock); 1133 osb->disable_recovery = 1; 1134 mutex_unlock(&osb->recovery_lock); 1135 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); 1136 1137 /* At this point, we know that no more recovery threads can be 1138 * launched, so wait for any recovery completion work to 1139 * complete. */ 1140 flush_workqueue(ocfs2_wq); 1141 1142 ocfs2_journal_shutdown(osb); 1143 1144 ocfs2_sync_blockdev(sb); 1145 1146 /* No dlm means we've failed during mount, so skip all the 1147 * steps which depended on that to complete. */ 1148 if (osb->dlm) { 1149 tmp = ocfs2_super_lock(osb, 1); 1150 if (tmp < 0) { 1151 mlog_errno(tmp); 1152 return; 1153 } 1154 1155 tmp = ocfs2_request_umount_vote(osb); 1156 if (tmp < 0) 1157 mlog_errno(tmp); 1158 1159 if (osb->slot_num != OCFS2_INVALID_SLOT) 1160 ocfs2_put_slot(osb); 1161 1162 ocfs2_super_unlock(osb, 1); 1163 } 1164 1165 ocfs2_release_system_inodes(osb); 1166 1167 if (osb->dlm) { 1168 ocfs2_unregister_net_handlers(osb); 1169 1170 ocfs2_dlm_shutdown(osb); 1171 } 1172 1173 ocfs2_clear_hb_callbacks(osb); 1174 1175 debugfs_remove(osb->osb_debug_root); 1176 1177 if (!mnt_err) 1178 ocfs2_stop_heartbeat(osb); 1179 1180 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1181 1182 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %d)\n", 1183 osb->dev_str, osb->node_num); 1184 1185 ocfs2_delete_osb(osb); 1186 kfree(osb); 1187 sb->s_dev = 0; 1188 sb->s_fs_info = NULL; 1189 } 1190 1191 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1192 unsigned uuid_bytes) 1193 { 1194 int i, ret; 1195 char *ptr; 1196 1197 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1198 1199 osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1200 if (osb->uuid_str == NULL) 1201 return -ENOMEM; 1202 1203 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1204 /* print with null */ 1205 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1206 if (ret != 2) /* drop super cleans up */ 1207 return -EINVAL; 1208 /* then only advance past the last char */ 1209 ptr += 2; 1210 } 1211 1212 return 0; 1213 } 1214 1215 static int ocfs2_initialize_super(struct super_block *sb, 1216 struct buffer_head *bh, 1217 int sector_size) 1218 { 1219 int status = 0; 1220 int i; 1221 struct ocfs2_dinode *di = NULL; 1222 struct inode *inode = NULL; 1223 struct buffer_head *bitmap_bh = NULL; 1224 struct ocfs2_journal *journal; 1225 __le32 uuid_net_key; 1226 struct ocfs2_super *osb; 1227 1228 mlog_entry_void(); 1229 1230 osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL); 1231 if (!osb) { 1232 status = -ENOMEM; 1233 mlog_errno(status); 1234 goto bail; 1235 } 1236 1237 sb->s_fs_info = osb; 1238 sb->s_op = &ocfs2_sops; 1239 sb->s_export_op = &ocfs2_export_ops; 1240 sb->s_flags |= MS_NOATIME; 1241 /* this is needed to support O_LARGEFILE */ 1242 sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits); 1243 1244 osb->sb = sb; 1245 /* Save off for ocfs2_rw_direct */ 1246 osb->s_sectsize_bits = blksize_bits(sector_size); 1247 BUG_ON(!osb->s_sectsize_bits); 1248 1249 osb->net_response_ids = 0; 1250 spin_lock_init(&osb->net_response_lock); 1251 INIT_LIST_HEAD(&osb->net_response_list); 1252 1253 INIT_LIST_HEAD(&osb->osb_net_handlers); 1254 init_waitqueue_head(&osb->recovery_event); 1255 spin_lock_init(&osb->vote_task_lock); 1256 init_waitqueue_head(&osb->vote_event); 1257 osb->vote_work_sequence = 0; 1258 osb->vote_wake_sequence = 0; 1259 INIT_LIST_HEAD(&osb->blocked_lock_list); 1260 osb->blocked_lock_count = 0; 1261 INIT_LIST_HEAD(&osb->vote_list); 1262 spin_lock_init(&osb->osb_lock); 1263 1264 atomic_set(&osb->alloc_stats.moves, 0); 1265 atomic_set(&osb->alloc_stats.local_data, 0); 1266 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1267 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1268 atomic_set(&osb->alloc_stats.bg_extends, 0); 1269 1270 ocfs2_init_node_maps(osb); 1271 1272 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1273 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1274 1275 mutex_init(&osb->recovery_lock); 1276 1277 osb->disable_recovery = 0; 1278 osb->recovery_thread_task = NULL; 1279 1280 init_waitqueue_head(&osb->checkpoint_event); 1281 atomic_set(&osb->needs_checkpoint, 0); 1282 1283 osb->node_num = O2NM_INVALID_NODE_NUM; 1284 osb->slot_num = OCFS2_INVALID_SLOT; 1285 1286 osb->local_alloc_state = OCFS2_LA_UNUSED; 1287 osb->local_alloc_bh = NULL; 1288 1289 ocfs2_setup_hb_callbacks(osb); 1290 1291 init_waitqueue_head(&osb->osb_mount_event); 1292 1293 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1294 if (!osb->vol_label) { 1295 mlog(ML_ERROR, "unable to alloc vol label\n"); 1296 status = -ENOMEM; 1297 goto bail; 1298 } 1299 1300 di = (struct ocfs2_dinode *)bh->b_data; 1301 1302 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1303 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1304 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1305 osb->max_slots); 1306 status = -EINVAL; 1307 goto bail; 1308 } 1309 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 1310 1311 init_waitqueue_head(&osb->osb_wipe_event); 1312 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 1313 sizeof(*osb->osb_orphan_wipes), 1314 GFP_KERNEL); 1315 if (!osb->osb_orphan_wipes) { 1316 status = -ENOMEM; 1317 mlog_errno(status); 1318 goto bail; 1319 } 1320 1321 osb->s_feature_compat = 1322 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 1323 osb->s_feature_ro_compat = 1324 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 1325 osb->s_feature_incompat = 1326 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 1327 1328 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 1329 mlog(ML_ERROR, "couldn't mount because of unsupported " 1330 "optional features (%x).\n", i); 1331 status = -EINVAL; 1332 goto bail; 1333 } 1334 if (!(osb->sb->s_flags & MS_RDONLY) && 1335 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 1336 mlog(ML_ERROR, "couldn't mount RDWR because of " 1337 "unsupported optional features (%x).\n", i); 1338 status = -EINVAL; 1339 goto bail; 1340 } 1341 1342 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 1343 1344 /* FIXME 1345 * This should be done in ocfs2_journal_init(), but unknown 1346 * ordering issues will cause the filesystem to crash. 1347 * If anyone wants to figure out what part of the code 1348 * refers to osb->journal before ocfs2_journal_init() is run, 1349 * be my guest. 1350 */ 1351 /* initialize our journal structure */ 1352 1353 journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL); 1354 if (!journal) { 1355 mlog(ML_ERROR, "unable to alloc journal\n"); 1356 status = -ENOMEM; 1357 goto bail; 1358 } 1359 osb->journal = journal; 1360 journal->j_osb = osb; 1361 1362 atomic_set(&journal->j_num_trans, 0); 1363 init_rwsem(&journal->j_trans_barrier); 1364 init_waitqueue_head(&journal->j_checkpointed); 1365 spin_lock_init(&journal->j_lock); 1366 journal->j_trans_id = (unsigned long) 1; 1367 INIT_LIST_HEAD(&journal->j_la_cleanups); 1368 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery, osb); 1369 journal->j_state = OCFS2_JOURNAL_FREE; 1370 1371 /* get some pseudo constants for clustersize bits */ 1372 osb->s_clustersize_bits = 1373 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1374 osb->s_clustersize = 1 << osb->s_clustersize_bits; 1375 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 1376 1377 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 1378 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 1379 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 1380 osb->s_clustersize); 1381 status = -EINVAL; 1382 goto bail; 1383 } 1384 1385 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 1386 > (u32)~0UL) { 1387 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 1388 "what jbd can address in 32 bits.\n"); 1389 status = -EINVAL; 1390 goto bail; 1391 } 1392 1393 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 1394 sizeof(di->id2.i_super.s_uuid))) { 1395 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 1396 status = -ENOMEM; 1397 goto bail; 1398 } 1399 1400 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 1401 osb->net_key = le32_to_cpu(uuid_net_key); 1402 1403 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 1404 osb->vol_label[63] = '\0'; 1405 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 1406 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 1407 osb->first_cluster_group_blkno = 1408 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 1409 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 1410 mlog(0, "vol_label: %s\n", osb->vol_label); 1411 mlog(0, "uuid: %s\n", osb->uuid_str); 1412 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 1413 (unsigned long long)osb->root_blkno, 1414 (unsigned long long)osb->system_dir_blkno); 1415 1416 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 1417 if (!osb->osb_dlm_debug) { 1418 status = -ENOMEM; 1419 mlog_errno(status); 1420 goto bail; 1421 } 1422 1423 atomic_set(&osb->vol_state, VOLUME_INIT); 1424 1425 /* load root, system_dir, and all global system inodes */ 1426 status = ocfs2_init_global_system_inodes(osb); 1427 if (status < 0) { 1428 mlog_errno(status); 1429 goto bail; 1430 } 1431 1432 /* 1433 * global bitmap 1434 */ 1435 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 1436 OCFS2_INVALID_SLOT); 1437 if (!inode) { 1438 status = -EINVAL; 1439 mlog_errno(status); 1440 goto bail; 1441 } 1442 1443 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 1444 1445 status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0, 1446 inode); 1447 iput(inode); 1448 if (status < 0) { 1449 mlog_errno(status); 1450 goto bail; 1451 } 1452 1453 di = (struct ocfs2_dinode *) bitmap_bh->b_data; 1454 osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg); 1455 osb->num_clusters = le32_to_cpu(di->id1.bitmap1.i_total); 1456 brelse(bitmap_bh); 1457 mlog(0, "cluster bitmap inode: %llu, clusters per group: %u\n", 1458 (unsigned long long)osb->bitmap_blkno, osb->bitmap_cpg); 1459 1460 status = ocfs2_init_slot_info(osb); 1461 if (status < 0) { 1462 mlog_errno(status); 1463 goto bail; 1464 } 1465 1466 bail: 1467 mlog_exit(status); 1468 return status; 1469 } 1470 1471 /* 1472 * will return: -EAGAIN if it is ok to keep searching for superblocks 1473 * -EINVAL if there is a bad superblock 1474 * 0 on success 1475 */ 1476 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 1477 struct buffer_head *bh, 1478 u32 blksz) 1479 { 1480 int status = -EAGAIN; 1481 1482 mlog_entry_void(); 1483 1484 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 1485 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 1486 status = -EINVAL; 1487 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 1488 mlog(ML_ERROR, "found superblock with incorrect block " 1489 "size: found %u, should be %u\n", 1490 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 1491 blksz); 1492 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 1493 OCFS2_MAJOR_REV_LEVEL || 1494 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 1495 OCFS2_MINOR_REV_LEVEL) { 1496 mlog(ML_ERROR, "found superblock with bad version: " 1497 "found %u.%u, should be %u.%u\n", 1498 le16_to_cpu(di->id2.i_super.s_major_rev_level), 1499 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 1500 OCFS2_MAJOR_REV_LEVEL, 1501 OCFS2_MINOR_REV_LEVEL); 1502 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 1503 mlog(ML_ERROR, "bad block number on superblock: " 1504 "found %llu, should be %llu\n", 1505 (unsigned long long)di->i_blkno, 1506 (unsigned long long)bh->b_blocknr); 1507 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 1508 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 1509 mlog(ML_ERROR, "bad cluster size found: %u\n", 1510 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 1511 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 1512 mlog(ML_ERROR, "bad root_blkno: 0\n"); 1513 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 1514 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 1515 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 1516 mlog(ML_ERROR, 1517 "Superblock slots found greater than file system " 1518 "maximum: found %u, max %u\n", 1519 le16_to_cpu(di->id2.i_super.s_max_slots), 1520 OCFS2_MAX_SLOTS); 1521 } else { 1522 /* found it! */ 1523 status = 0; 1524 } 1525 } 1526 1527 mlog_exit(status); 1528 return status; 1529 } 1530 1531 static int ocfs2_check_volume(struct ocfs2_super *osb) 1532 { 1533 int status = 0; 1534 int dirty; 1535 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 1536 * recover 1537 * ourselves. */ 1538 1539 mlog_entry_void(); 1540 1541 /* Init our journal object. */ 1542 status = ocfs2_journal_init(osb->journal, &dirty); 1543 if (status < 0) { 1544 mlog(ML_ERROR, "Could not initialize journal!\n"); 1545 goto finally; 1546 } 1547 1548 /* If the journal was unmounted cleanly then we don't want to 1549 * recover anything. Otherwise, journal_load will do that 1550 * dirty work for us :) */ 1551 if (!dirty) { 1552 status = ocfs2_journal_wipe(osb->journal, 0); 1553 if (status < 0) { 1554 mlog_errno(status); 1555 goto finally; 1556 } 1557 } else { 1558 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 1559 "recovering volume.\n"); 1560 } 1561 1562 /* will play back anything left in the journal. */ 1563 ocfs2_journal_load(osb->journal); 1564 1565 if (dirty) { 1566 /* recover my local alloc if we didn't unmount cleanly. */ 1567 status = ocfs2_begin_local_alloc_recovery(osb, 1568 osb->slot_num, 1569 &local_alloc); 1570 if (status < 0) { 1571 mlog_errno(status); 1572 goto finally; 1573 } 1574 /* we complete the recovery process after we've marked 1575 * ourselves as mounted. */ 1576 } 1577 1578 mlog(0, "Journal loaded.\n"); 1579 1580 status = ocfs2_load_local_alloc(osb); 1581 if (status < 0) { 1582 mlog_errno(status); 1583 goto finally; 1584 } 1585 1586 if (dirty) { 1587 /* Recovery will be completed after we've mounted the 1588 * rest of the volume. */ 1589 osb->dirty = 1; 1590 osb->local_alloc_copy = local_alloc; 1591 local_alloc = NULL; 1592 } 1593 1594 /* go through each journal, trylock it and if you get the 1595 * lock, and it's marked as dirty, set the bit in the recover 1596 * map and launch a recovery thread for it. */ 1597 status = ocfs2_mark_dead_nodes(osb); 1598 if (status < 0) 1599 mlog_errno(status); 1600 1601 finally: 1602 if (local_alloc) 1603 kfree(local_alloc); 1604 1605 mlog_exit(status); 1606 return status; 1607 } 1608 1609 /* 1610 * The routine gets called from dismount or close whenever a dismount on 1611 * volume is requested and the osb open count becomes 1. 1612 * It will remove the osb from the global list and also free up all the 1613 * initialized resources and fileobject. 1614 */ 1615 static void ocfs2_delete_osb(struct ocfs2_super *osb) 1616 { 1617 mlog_entry_void(); 1618 1619 /* This function assumes that the caller has the main osb resource */ 1620 1621 if (osb->slot_info) 1622 ocfs2_free_slot_info(osb->slot_info); 1623 1624 kfree(osb->osb_orphan_wipes); 1625 /* FIXME 1626 * This belongs in journal shutdown, but because we have to 1627 * allocate osb->journal at the start of ocfs2_initalize_osb(), 1628 * we free it here. 1629 */ 1630 kfree(osb->journal); 1631 if (osb->local_alloc_copy) 1632 kfree(osb->local_alloc_copy); 1633 kfree(osb->uuid_str); 1634 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 1635 memset(osb, 0, sizeof(struct ocfs2_super)); 1636 1637 mlog_exit_void(); 1638 } 1639 1640 /* Put OCFS2 into a readonly state, or (if the user specifies it), 1641 * panic(). We do not support continue-on-error operation. */ 1642 static void ocfs2_handle_error(struct super_block *sb) 1643 { 1644 struct ocfs2_super *osb = OCFS2_SB(sb); 1645 1646 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 1647 panic("OCFS2: (device %s): panic forced after error\n", 1648 sb->s_id); 1649 1650 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 1651 1652 if (sb->s_flags & MS_RDONLY && 1653 (ocfs2_is_soft_readonly(osb) || 1654 ocfs2_is_hard_readonly(osb))) 1655 return; 1656 1657 printk(KERN_CRIT "File system is now read-only due to the potential " 1658 "of on-disk corruption. Please run fsck.ocfs2 once the file " 1659 "system is unmounted.\n"); 1660 sb->s_flags |= MS_RDONLY; 1661 ocfs2_set_ro_flag(osb, 0); 1662 } 1663 1664 static char error_buf[1024]; 1665 1666 void __ocfs2_error(struct super_block *sb, 1667 const char *function, 1668 const char *fmt, ...) 1669 { 1670 va_list args; 1671 1672 va_start(args, fmt); 1673 vsprintf(error_buf, fmt, args); 1674 va_end(args); 1675 1676 /* Not using mlog here because we want to show the actual 1677 * function the error came from. */ 1678 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 1679 sb->s_id, function, error_buf); 1680 1681 ocfs2_handle_error(sb); 1682 } 1683 1684 /* Handle critical errors. This is intentionally more drastic than 1685 * ocfs2_handle_error, so we only use for things like journal errors, 1686 * etc. */ 1687 void __ocfs2_abort(struct super_block* sb, 1688 const char *function, 1689 const char *fmt, ...) 1690 { 1691 va_list args; 1692 1693 va_start(args, fmt); 1694 vsprintf(error_buf, fmt, args); 1695 va_end(args); 1696 1697 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 1698 sb->s_id, function, error_buf); 1699 1700 /* We don't have the cluster support yet to go straight to 1701 * hard readonly in here. Until then, we want to keep 1702 * ocfs2_abort() so that we can at least mark critical 1703 * errors. 1704 * 1705 * TODO: This should abort the journal and alert other nodes 1706 * that our slot needs recovery. */ 1707 1708 /* Force a panic(). This stinks, but it's better than letting 1709 * things continue without having a proper hard readonly 1710 * here. */ 1711 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1712 ocfs2_handle_error(sb); 1713 } 1714 1715 module_init(ocfs2_init); 1716 module_exit(ocfs2_exit); 1717