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 /* 72 * Globals 73 */ 74 static spinlock_t ocfs2_globals_lock = SPIN_LOCK_UNLOCKED; 75 76 static u32 osb_id; /* Keeps track of next available OSB Id */ 77 78 static kmem_cache_t *ocfs2_inode_cachep = NULL; 79 80 kmem_cache_t *ocfs2_lock_cache = NULL; 81 82 /* OCFS2 needs to schedule several differnt types of work which 83 * require cluster locking, disk I/O, recovery waits, etc. Since these 84 * types of work tend to be heavy we avoid using the kernel events 85 * workqueue and schedule on our own. */ 86 struct workqueue_struct *ocfs2_wq = NULL; 87 88 static struct dentry *ocfs2_debugfs_root = NULL; 89 90 MODULE_AUTHOR("Oracle"); 91 MODULE_LICENSE("GPL"); 92 93 static int ocfs2_parse_options(struct super_block *sb, char *options, 94 unsigned long *mount_opt, int is_remount); 95 static void ocfs2_put_super(struct super_block *sb); 96 static int ocfs2_mount_volume(struct super_block *sb); 97 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 98 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 99 static int ocfs2_initialize_mem_caches(void); 100 static void ocfs2_free_mem_caches(void); 101 static void ocfs2_delete_osb(struct ocfs2_super *osb); 102 103 static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf); 104 105 static int ocfs2_sync_fs(struct super_block *sb, int wait); 106 107 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 108 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 109 static int ocfs2_release_system_inodes(struct ocfs2_super *osb); 110 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb); 111 static int ocfs2_check_volume(struct ocfs2_super *osb); 112 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 113 struct buffer_head *bh, 114 u32 sectsize); 115 static int ocfs2_initialize_super(struct super_block *sb, 116 struct buffer_head *bh, 117 int sector_size); 118 static int ocfs2_get_sector(struct super_block *sb, 119 struct buffer_head **bh, 120 int block, 121 int sect_size); 122 static void ocfs2_write_super(struct super_block *sb); 123 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 124 static void ocfs2_destroy_inode(struct inode *inode); 125 126 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift); 127 128 static struct super_operations ocfs2_sops = { 129 .statfs = ocfs2_statfs, 130 .alloc_inode = ocfs2_alloc_inode, 131 .destroy_inode = ocfs2_destroy_inode, 132 .drop_inode = ocfs2_drop_inode, 133 .clear_inode = ocfs2_clear_inode, 134 .delete_inode = ocfs2_delete_inode, 135 .sync_fs = ocfs2_sync_fs, 136 .write_super = ocfs2_write_super, 137 .put_super = ocfs2_put_super, 138 .remount_fs = ocfs2_remount, 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_err, 152 }; 153 154 static match_table_t tokens = { 155 {Opt_barrier, "barrier=%u"}, 156 {Opt_err_panic, "errors=panic"}, 157 {Opt_err_ro, "errors=remount-ro"}, 158 {Opt_intr, "intr"}, 159 {Opt_nointr, "nointr"}, 160 {Opt_hb_none, OCFS2_HB_NONE}, 161 {Opt_hb_local, OCFS2_HB_LOCAL}, 162 {Opt_data_ordered, "data=ordered"}, 163 {Opt_data_writeback, "data=writeback"}, 164 {Opt_err, NULL} 165 }; 166 167 /* 168 * write_super and sync_fs ripped right out of ext3. 169 */ 170 static void ocfs2_write_super(struct super_block *sb) 171 { 172 if (mutex_trylock(&sb->s_lock) != 0) 173 BUG(); 174 sb->s_dirt = 0; 175 } 176 177 static int ocfs2_sync_fs(struct super_block *sb, int wait) 178 { 179 int status = 0; 180 tid_t target; 181 struct ocfs2_super *osb = OCFS2_SB(sb); 182 183 sb->s_dirt = 0; 184 185 if (ocfs2_is_hard_readonly(osb)) 186 return -EROFS; 187 188 if (wait) { 189 status = ocfs2_flush_truncate_log(osb); 190 if (status < 0) 191 mlog_errno(status); 192 } else { 193 ocfs2_schedule_truncate_log_flush(osb, 0); 194 } 195 196 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) { 197 if (wait) 198 log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 199 target); 200 } 201 return 0; 202 } 203 204 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 205 { 206 struct inode *new = NULL; 207 int status = 0; 208 int i; 209 210 mlog_entry_void(); 211 212 new = ocfs2_iget(osb, osb->root_blkno); 213 if (IS_ERR(new)) { 214 status = PTR_ERR(new); 215 mlog_errno(status); 216 goto bail; 217 } 218 osb->root_inode = new; 219 220 new = ocfs2_iget(osb, osb->system_dir_blkno); 221 if (IS_ERR(new)) { 222 status = PTR_ERR(new); 223 mlog_errno(status); 224 goto bail; 225 } 226 osb->sys_root_inode = new; 227 228 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 229 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 230 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 231 if (!new) { 232 ocfs2_release_system_inodes(osb); 233 status = -EINVAL; 234 mlog_errno(status); 235 /* FIXME: Should ERROR_RO_FS */ 236 mlog(ML_ERROR, "Unable to load system inode %d, " 237 "possibly corrupt fs?", i); 238 goto bail; 239 } 240 // the array now has one ref, so drop this one 241 iput(new); 242 } 243 244 bail: 245 mlog_exit(status); 246 return status; 247 } 248 249 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 250 { 251 struct inode *new = NULL; 252 int status = 0; 253 int i; 254 255 mlog_entry_void(); 256 257 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 258 i < NUM_SYSTEM_INODES; 259 i++) { 260 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 261 if (!new) { 262 ocfs2_release_system_inodes(osb); 263 status = -EINVAL; 264 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 265 status, i, osb->slot_num); 266 goto bail; 267 } 268 /* the array now has one ref, so drop this one */ 269 iput(new); 270 } 271 272 bail: 273 mlog_exit(status); 274 return status; 275 } 276 277 static int ocfs2_release_system_inodes(struct ocfs2_super *osb) 278 { 279 int status = 0, i; 280 struct inode *inode; 281 282 mlog_entry_void(); 283 284 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 285 inode = osb->system_inodes[i]; 286 if (inode) { 287 iput(inode); 288 osb->system_inodes[i] = NULL; 289 } 290 } 291 292 inode = osb->sys_root_inode; 293 if (inode) { 294 iput(inode); 295 osb->sys_root_inode = NULL; 296 } 297 298 inode = osb->root_inode; 299 if (inode) { 300 iput(inode); 301 osb->root_inode = NULL; 302 } 303 304 mlog_exit(status); 305 return status; 306 } 307 308 /* We're allocating fs objects, use GFP_NOFS */ 309 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 310 { 311 struct ocfs2_inode_info *oi; 312 313 oi = kmem_cache_alloc(ocfs2_inode_cachep, SLAB_NOFS); 314 if (!oi) 315 return NULL; 316 317 return &oi->vfs_inode; 318 } 319 320 static void ocfs2_destroy_inode(struct inode *inode) 321 { 322 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 323 } 324 325 /* From xfs_super.c:xfs_max_file_offset 326 * Copyright (c) 2000-2004 Silicon Graphics, Inc. 327 */ 328 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift) 329 { 330 unsigned int pagefactor = 1; 331 unsigned int bitshift = BITS_PER_LONG - 1; 332 333 /* Figure out maximum filesize, on Linux this can depend on 334 * the filesystem blocksize (on 32 bit platforms). 335 * __block_prepare_write does this in an [unsigned] long... 336 * page->index << (PAGE_CACHE_SHIFT - bbits) 337 * So, for page sized blocks (4K on 32 bit platforms), 338 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 339 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 340 * but for smaller blocksizes it is less (bbits = log2 bsize). 341 * Note1: get_block_t takes a long (implicit cast from above) 342 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 343 * can optionally convert the [unsigned] long from above into 344 * an [unsigned] long long. 345 */ 346 347 #if BITS_PER_LONG == 32 348 # if defined(CONFIG_LBD) 349 BUG_ON(sizeof(sector_t) != 8); 350 pagefactor = PAGE_CACHE_SIZE; 351 bitshift = BITS_PER_LONG; 352 # else 353 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 354 # endif 355 #endif 356 357 return (((unsigned long long)pagefactor) << bitshift) - 1; 358 } 359 360 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 361 { 362 int incompat_features; 363 int ret = 0; 364 unsigned long parsed_options; 365 struct ocfs2_super *osb = OCFS2_SB(sb); 366 367 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 368 ret = -EINVAL; 369 goto out; 370 } 371 372 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 373 (parsed_options & OCFS2_MOUNT_HB_LOCAL)) { 374 ret = -EINVAL; 375 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 376 goto out; 377 } 378 379 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 380 (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) { 381 ret = -EINVAL; 382 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 383 goto out; 384 } 385 386 /* We're going to/from readonly mode. */ 387 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 388 /* Lock here so the check of HARD_RO and the potential 389 * setting of SOFT_RO is atomic. */ 390 spin_lock(&osb->osb_lock); 391 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 392 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 393 ret = -EROFS; 394 goto unlock_osb; 395 } 396 397 if (*flags & MS_RDONLY) { 398 mlog(0, "Going to ro mode.\n"); 399 sb->s_flags |= MS_RDONLY; 400 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 401 } else { 402 mlog(0, "Making ro filesystem writeable.\n"); 403 404 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 405 mlog(ML_ERROR, "Cannot remount RDWR " 406 "filesystem due to previous errors.\n"); 407 ret = -EROFS; 408 goto unlock_osb; 409 } 410 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 411 if (incompat_features) { 412 mlog(ML_ERROR, "Cannot remount RDWR because " 413 "of unsupported optional features " 414 "(%x).\n", incompat_features); 415 ret = -EINVAL; 416 goto unlock_osb; 417 } 418 sb->s_flags &= ~MS_RDONLY; 419 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 420 } 421 unlock_osb: 422 spin_unlock(&osb->osb_lock); 423 } 424 425 if (!ret) { 426 if (!ocfs2_is_hard_readonly(osb)) 427 ocfs2_set_journal_params(osb); 428 429 /* Only save off the new mount options in case of a successful 430 * remount. */ 431 osb->s_mount_opt = parsed_options; 432 } 433 out: 434 return ret; 435 } 436 437 static int ocfs2_sb_probe(struct super_block *sb, 438 struct buffer_head **bh, 439 int *sector_size) 440 { 441 int status = 0, tmpstat; 442 struct ocfs1_vol_disk_hdr *hdr; 443 struct ocfs2_dinode *di; 444 int blksize; 445 446 *bh = NULL; 447 448 /* may be > 512 */ 449 *sector_size = bdev_hardsect_size(sb->s_bdev); 450 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 451 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 452 *sector_size, OCFS2_MAX_BLOCKSIZE); 453 status = -EINVAL; 454 goto bail; 455 } 456 457 /* Can this really happen? */ 458 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 459 *sector_size = OCFS2_MIN_BLOCKSIZE; 460 461 /* check block zero for old format */ 462 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 463 if (status < 0) { 464 mlog_errno(status); 465 goto bail; 466 } 467 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 468 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 469 mlog(ML_ERROR, "incompatible version: %u.%u\n", 470 hdr->major_version, hdr->minor_version); 471 status = -EINVAL; 472 } 473 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 474 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 475 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 476 hdr->signature); 477 status = -EINVAL; 478 } 479 brelse(*bh); 480 *bh = NULL; 481 if (status < 0) { 482 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 483 "upgraded before mounting with ocfs v2\n"); 484 goto bail; 485 } 486 487 /* 488 * Now check at magic offset for 512, 1024, 2048, 4096 489 * blocksizes. 4096 is the maximum blocksize because it is 490 * the minimum clustersize. 491 */ 492 status = -EINVAL; 493 for (blksize = *sector_size; 494 blksize <= OCFS2_MAX_BLOCKSIZE; 495 blksize <<= 1) { 496 tmpstat = ocfs2_get_sector(sb, bh, 497 OCFS2_SUPER_BLOCK_BLKNO, 498 blksize); 499 if (tmpstat < 0) { 500 status = tmpstat; 501 mlog_errno(status); 502 goto bail; 503 } 504 di = (struct ocfs2_dinode *) (*bh)->b_data; 505 status = ocfs2_verify_volume(di, *bh, blksize); 506 if (status >= 0) 507 goto bail; 508 brelse(*bh); 509 *bh = NULL; 510 if (status != -EAGAIN) 511 break; 512 } 513 514 bail: 515 return status; 516 } 517 518 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 519 { 520 struct dentry *root; 521 int status, sector_size; 522 unsigned long parsed_opt; 523 struct inode *inode = NULL; 524 struct ocfs2_super *osb = NULL; 525 struct buffer_head *bh = NULL; 526 527 mlog_entry("%p, %p, %i", sb, data, silent); 528 529 /* for now we only have one cluster/node, make sure we see it 530 * in the heartbeat universe */ 531 if (!o2hb_check_local_node_heartbeating()) { 532 status = -EINVAL; 533 goto read_super_error; 534 } 535 536 /* probe for superblock */ 537 status = ocfs2_sb_probe(sb, &bh, §or_size); 538 if (status < 0) { 539 mlog(ML_ERROR, "superblock probe failed!\n"); 540 goto read_super_error; 541 } 542 543 status = ocfs2_initialize_super(sb, bh, sector_size); 544 osb = OCFS2_SB(sb); 545 if (status < 0) { 546 mlog_errno(status); 547 goto read_super_error; 548 } 549 brelse(bh); 550 bh = NULL; 551 552 if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) { 553 status = -EINVAL; 554 goto read_super_error; 555 } 556 osb->s_mount_opt = parsed_opt; 557 558 sb->s_magic = OCFS2_SUPER_MAGIC; 559 560 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 561 * heartbeat=none */ 562 if (bdev_read_only(sb->s_bdev)) { 563 if (!(sb->s_flags & MS_RDONLY)) { 564 status = -EACCES; 565 mlog(ML_ERROR, "Readonly device detected but readonly " 566 "mount was not specified.\n"); 567 goto read_super_error; 568 } 569 570 /* You should not be able to start a local heartbeat 571 * on a readonly device. */ 572 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 573 status = -EROFS; 574 mlog(ML_ERROR, "Local heartbeat specified on readonly " 575 "device.\n"); 576 goto read_super_error; 577 } 578 579 status = ocfs2_check_journals_nolocks(osb); 580 if (status < 0) { 581 if (status == -EROFS) 582 mlog(ML_ERROR, "Recovery required on readonly " 583 "file system, but write access is " 584 "unavailable.\n"); 585 else 586 mlog_errno(status); 587 goto read_super_error; 588 } 589 590 ocfs2_set_ro_flag(osb, 1); 591 592 printk(KERN_NOTICE "Readonly device detected. No cluster " 593 "services will be utilized for this mount. Recovery " 594 "will be skipped.\n"); 595 } 596 597 if (!ocfs2_is_hard_readonly(osb)) { 598 /* If this isn't a hard readonly mount, then we need 599 * to make sure that heartbeat is in a valid state, 600 * and that we mark ourselves soft readonly is -oro 601 * was specified. */ 602 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 603 mlog(ML_ERROR, "No heartbeat for device (%s)\n", 604 sb->s_id); 605 status = -EINVAL; 606 goto read_super_error; 607 } 608 609 if (sb->s_flags & MS_RDONLY) 610 ocfs2_set_ro_flag(osb, 0); 611 } 612 613 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 614 ocfs2_debugfs_root); 615 if (!osb->osb_debug_root) { 616 status = -EINVAL; 617 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 618 goto read_super_error; 619 } 620 621 status = ocfs2_mount_volume(sb); 622 if (osb->root_inode) 623 inode = igrab(osb->root_inode); 624 625 if (status < 0) 626 goto read_super_error; 627 628 if (!inode) { 629 status = -EIO; 630 mlog_errno(status); 631 goto read_super_error; 632 } 633 634 root = d_alloc_root(inode); 635 if (!root) { 636 status = -ENOMEM; 637 mlog_errno(status); 638 goto read_super_error; 639 } 640 641 sb->s_root = root; 642 643 ocfs2_complete_mount_recovery(osb); 644 645 printk("ocfs2: Mounting device (%u,%u) on (node %d, slot %d) with %s " 646 "data mode.\n", 647 MAJOR(sb->s_dev), MINOR(sb->s_dev), osb->node_num, 648 osb->slot_num, 649 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 650 "ordered"); 651 652 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 653 wake_up(&osb->osb_mount_event); 654 655 mlog_exit(status); 656 return status; 657 658 read_super_error: 659 if (bh != NULL) 660 brelse(bh); 661 662 if (inode) 663 iput(inode); 664 665 if (osb) { 666 atomic_set(&osb->vol_state, VOLUME_DISABLED); 667 wake_up(&osb->osb_mount_event); 668 ocfs2_dismount_volume(sb, 1); 669 } 670 671 mlog_exit(status); 672 return status; 673 } 674 675 static struct super_block *ocfs2_get_sb(struct file_system_type *fs_type, 676 int flags, 677 const char *dev_name, 678 void *data) 679 { 680 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 681 } 682 683 static struct file_system_type ocfs2_fs_type = { 684 .owner = THIS_MODULE, 685 .name = "ocfs2", 686 .get_sb = ocfs2_get_sb, /* is this called when we mount 687 * the fs? */ 688 .kill_sb = kill_block_super, /* set to the generic one 689 * right now, but do we 690 * need to change that? */ 691 .fs_flags = FS_REQUIRES_DEV, 692 .next = NULL 693 }; 694 695 static int ocfs2_parse_options(struct super_block *sb, 696 char *options, 697 unsigned long *mount_opt, 698 int is_remount) 699 { 700 int status; 701 char *p; 702 703 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 704 options ? options : "(none)"); 705 706 *mount_opt = 0; 707 708 if (!options) { 709 status = 1; 710 goto bail; 711 } 712 713 while ((p = strsep(&options, ",")) != NULL) { 714 int token, option; 715 substring_t args[MAX_OPT_ARGS]; 716 717 if (!*p) 718 continue; 719 720 token = match_token(p, tokens, args); 721 switch (token) { 722 case Opt_hb_local: 723 *mount_opt |= OCFS2_MOUNT_HB_LOCAL; 724 break; 725 case Opt_hb_none: 726 *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 727 break; 728 case Opt_barrier: 729 if (match_int(&args[0], &option)) { 730 status = 0; 731 goto bail; 732 } 733 if (option) 734 *mount_opt |= OCFS2_MOUNT_BARRIER; 735 else 736 *mount_opt &= ~OCFS2_MOUNT_BARRIER; 737 break; 738 case Opt_intr: 739 *mount_opt &= ~OCFS2_MOUNT_NOINTR; 740 break; 741 case Opt_nointr: 742 *mount_opt |= OCFS2_MOUNT_NOINTR; 743 break; 744 case Opt_err_panic: 745 *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 746 break; 747 case Opt_err_ro: 748 *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 749 break; 750 case Opt_data_ordered: 751 *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 752 break; 753 case Opt_data_writeback: 754 *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 755 break; 756 default: 757 mlog(ML_ERROR, 758 "Unrecognized mount option \"%s\" " 759 "or missing value\n", p); 760 status = 0; 761 goto bail; 762 } 763 } 764 765 status = 1; 766 767 bail: 768 mlog_exit(status); 769 return status; 770 } 771 772 static int __init ocfs2_init(void) 773 { 774 int status; 775 776 mlog_entry_void(); 777 778 ocfs2_print_version(); 779 780 if (init_ocfs2_extent_maps()) 781 return -ENOMEM; 782 783 status = init_ocfs2_uptodate_cache(); 784 if (status < 0) { 785 mlog_errno(status); 786 goto leave; 787 } 788 789 status = ocfs2_initialize_mem_caches(); 790 if (status < 0) { 791 mlog_errno(status); 792 goto leave; 793 } 794 795 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 796 if (!ocfs2_wq) { 797 status = -ENOMEM; 798 goto leave; 799 } 800 801 spin_lock(&ocfs2_globals_lock); 802 osb_id = 0; 803 spin_unlock(&ocfs2_globals_lock); 804 805 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 806 if (!ocfs2_debugfs_root) { 807 status = -EFAULT; 808 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 809 } 810 811 leave: 812 if (status < 0) { 813 ocfs2_free_mem_caches(); 814 exit_ocfs2_uptodate_cache(); 815 exit_ocfs2_extent_maps(); 816 } 817 818 mlog_exit(status); 819 820 if (status >= 0) { 821 return register_filesystem(&ocfs2_fs_type); 822 } else 823 return -1; 824 } 825 826 static void __exit ocfs2_exit(void) 827 { 828 mlog_entry_void(); 829 830 if (ocfs2_wq) { 831 flush_workqueue(ocfs2_wq); 832 destroy_workqueue(ocfs2_wq); 833 } 834 835 debugfs_remove(ocfs2_debugfs_root); 836 837 ocfs2_free_mem_caches(); 838 839 unregister_filesystem(&ocfs2_fs_type); 840 841 exit_ocfs2_extent_maps(); 842 843 exit_ocfs2_uptodate_cache(); 844 845 mlog_exit_void(); 846 } 847 848 static void ocfs2_put_super(struct super_block *sb) 849 { 850 mlog_entry("(0x%p)\n", sb); 851 852 ocfs2_sync_blockdev(sb); 853 ocfs2_dismount_volume(sb, 0); 854 855 mlog_exit_void(); 856 } 857 858 static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf) 859 { 860 struct ocfs2_super *osb; 861 u32 numbits, freebits; 862 int status; 863 struct ocfs2_dinode *bm_lock; 864 struct buffer_head *bh = NULL; 865 struct inode *inode = NULL; 866 867 mlog_entry("(%p, %p)\n", sb, buf); 868 869 osb = OCFS2_SB(sb); 870 871 inode = ocfs2_get_system_file_inode(osb, 872 GLOBAL_BITMAP_SYSTEM_INODE, 873 OCFS2_INVALID_SLOT); 874 if (!inode) { 875 mlog(ML_ERROR, "failed to get bitmap inode\n"); 876 status = -EIO; 877 goto bail; 878 } 879 880 status = ocfs2_meta_lock(inode, NULL, &bh, 0); 881 if (status < 0) { 882 mlog_errno(status); 883 goto bail; 884 } 885 886 bm_lock = (struct ocfs2_dinode *) bh->b_data; 887 888 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 889 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 890 891 buf->f_type = OCFS2_SUPER_MAGIC; 892 buf->f_bsize = sb->s_blocksize; 893 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 894 buf->f_blocks = ((sector_t) numbits) * 895 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 896 buf->f_bfree = ((sector_t) freebits) * 897 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 898 buf->f_bavail = buf->f_bfree; 899 buf->f_files = numbits; 900 buf->f_ffree = freebits; 901 902 brelse(bh); 903 904 ocfs2_meta_unlock(inode, 0); 905 status = 0; 906 bail: 907 if (inode) 908 iput(inode); 909 910 mlog_exit(status); 911 912 return status; 913 } 914 915 static void ocfs2_inode_init_once(void *data, 916 kmem_cache_t *cachep, 917 unsigned long flags) 918 { 919 struct ocfs2_inode_info *oi = data; 920 921 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 922 SLAB_CTOR_CONSTRUCTOR) { 923 oi->ip_flags = 0; 924 oi->ip_open_count = 0; 925 spin_lock_init(&oi->ip_lock); 926 ocfs2_extent_map_init(&oi->vfs_inode); 927 INIT_LIST_HEAD(&oi->ip_handle_list); 928 INIT_LIST_HEAD(&oi->ip_io_markers); 929 oi->ip_handle = NULL; 930 oi->ip_created_trans = 0; 931 oi->ip_last_trans = 0; 932 oi->ip_dir_start_lookup = 0; 933 934 init_rwsem(&oi->ip_alloc_sem); 935 init_MUTEX(&(oi->ip_io_sem)); 936 937 oi->ip_blkno = 0ULL; 938 oi->ip_clusters = 0; 939 940 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 941 ocfs2_lock_res_init_once(&oi->ip_meta_lockres); 942 ocfs2_lock_res_init_once(&oi->ip_data_lockres); 943 944 ocfs2_metadata_cache_init(&oi->vfs_inode); 945 946 inode_init_once(&oi->vfs_inode); 947 } 948 } 949 950 static int ocfs2_initialize_mem_caches(void) 951 { 952 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 953 sizeof(struct ocfs2_inode_info), 954 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT, 955 ocfs2_inode_init_once, NULL); 956 if (!ocfs2_inode_cachep) 957 return -ENOMEM; 958 959 ocfs2_lock_cache = kmem_cache_create("ocfs2_lock", 960 sizeof(struct ocfs2_journal_lock), 961 0, 962 SLAB_NO_REAP|SLAB_HWCACHE_ALIGN, 963 NULL, NULL); 964 if (!ocfs2_lock_cache) 965 return -ENOMEM; 966 967 return 0; 968 } 969 970 static void ocfs2_free_mem_caches(void) 971 { 972 if (ocfs2_inode_cachep) 973 kmem_cache_destroy(ocfs2_inode_cachep); 974 if (ocfs2_lock_cache) 975 kmem_cache_destroy(ocfs2_lock_cache); 976 977 ocfs2_inode_cachep = NULL; 978 ocfs2_lock_cache = NULL; 979 } 980 981 static int ocfs2_get_sector(struct super_block *sb, 982 struct buffer_head **bh, 983 int block, 984 int sect_size) 985 { 986 if (!sb_set_blocksize(sb, sect_size)) { 987 mlog(ML_ERROR, "unable to set blocksize\n"); 988 return -EIO; 989 } 990 991 *bh = sb_getblk(sb, block); 992 if (!*bh) { 993 mlog_errno(-EIO); 994 return -EIO; 995 } 996 lock_buffer(*bh); 997 if (!buffer_dirty(*bh)) 998 clear_buffer_uptodate(*bh); 999 unlock_buffer(*bh); 1000 ll_rw_block(READ, 1, bh); 1001 wait_on_buffer(*bh); 1002 return 0; 1003 } 1004 1005 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */ 1006 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) 1007 { 1008 int status; 1009 1010 /* XXX hold a ref on the node while mounte? easy enough, if 1011 * desirable. */ 1012 osb->node_num = o2nm_this_node(); 1013 if (osb->node_num == O2NM_MAX_NODES) { 1014 mlog(ML_ERROR, "could not find this host's node number\n"); 1015 status = -ENOENT; 1016 goto bail; 1017 } 1018 1019 mlog(ML_NOTICE, "I am node %d\n", osb->node_num); 1020 1021 status = 0; 1022 bail: 1023 return status; 1024 } 1025 1026 static int ocfs2_mount_volume(struct super_block *sb) 1027 { 1028 int status = 0; 1029 int unlock_super = 0; 1030 struct ocfs2_super *osb = OCFS2_SB(sb); 1031 1032 mlog_entry_void(); 1033 1034 if (ocfs2_is_hard_readonly(osb)) 1035 goto leave; 1036 1037 status = ocfs2_fill_local_node_info(osb); 1038 if (status < 0) { 1039 mlog_errno(status); 1040 goto leave; 1041 } 1042 1043 status = ocfs2_register_hb_callbacks(osb); 1044 if (status < 0) { 1045 mlog_errno(status); 1046 goto leave; 1047 } 1048 1049 status = ocfs2_dlm_init(osb); 1050 if (status < 0) { 1051 mlog_errno(status); 1052 goto leave; 1053 } 1054 1055 /* requires vote_thread to be running. */ 1056 status = ocfs2_register_net_handlers(osb); 1057 if (status < 0) { 1058 mlog_errno(status); 1059 goto leave; 1060 } 1061 1062 status = ocfs2_super_lock(osb, 1); 1063 if (status < 0) { 1064 mlog_errno(status); 1065 goto leave; 1066 } 1067 unlock_super = 1; 1068 1069 /* This will load up the node map and add ourselves to it. */ 1070 status = ocfs2_find_slot(osb); 1071 if (status < 0) { 1072 mlog_errno(status); 1073 goto leave; 1074 } 1075 1076 ocfs2_populate_mounted_map(osb); 1077 1078 /* load all node-local system inodes */ 1079 status = ocfs2_init_local_system_inodes(osb); 1080 if (status < 0) { 1081 mlog_errno(status); 1082 goto leave; 1083 } 1084 1085 status = ocfs2_check_volume(osb); 1086 if (status < 0) { 1087 mlog_errno(status); 1088 goto leave; 1089 } 1090 1091 status = ocfs2_truncate_log_init(osb); 1092 if (status < 0) { 1093 mlog_errno(status); 1094 goto leave; 1095 } 1096 1097 /* This should be sent *after* we recovered our journal as it 1098 * will cause other nodes to unmark us as needing 1099 * recovery. However, we need to send it *before* dropping the 1100 * super block lock as otherwise their recovery threads might 1101 * try to clean us up while we're live! */ 1102 status = ocfs2_request_mount_vote(osb); 1103 if (status < 0) 1104 mlog_errno(status); 1105 1106 leave: 1107 if (unlock_super) 1108 ocfs2_super_unlock(osb, 1); 1109 1110 mlog_exit(status); 1111 return status; 1112 } 1113 1114 /* we can't grab the goofy sem lock from inside wait_event, so we use 1115 * memory barriers to make sure that we'll see the null task before 1116 * being woken up */ 1117 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) 1118 { 1119 mb(); 1120 return osb->recovery_thread_task != NULL; 1121 } 1122 1123 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1124 { 1125 int tmp; 1126 struct ocfs2_super *osb = NULL; 1127 1128 mlog_entry("(0x%p)\n", sb); 1129 1130 BUG_ON(!sb); 1131 osb = OCFS2_SB(sb); 1132 BUG_ON(!osb); 1133 1134 ocfs2_shutdown_local_alloc(osb); 1135 1136 ocfs2_truncate_log_shutdown(osb); 1137 1138 /* disable any new recovery threads and wait for any currently 1139 * running ones to exit. Do this before setting the vol_state. */ 1140 down(&osb->recovery_lock); 1141 osb->disable_recovery = 1; 1142 up(&osb->recovery_lock); 1143 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); 1144 1145 /* At this point, we know that no more recovery threads can be 1146 * launched, so wait for any recovery completion work to 1147 * complete. */ 1148 flush_workqueue(ocfs2_wq); 1149 1150 ocfs2_journal_shutdown(osb); 1151 1152 ocfs2_sync_blockdev(sb); 1153 1154 /* No dlm means we've failed during mount, so skip all the 1155 * steps which depended on that to complete. */ 1156 if (osb->dlm) { 1157 tmp = ocfs2_super_lock(osb, 1); 1158 if (tmp < 0) { 1159 mlog_errno(tmp); 1160 return; 1161 } 1162 1163 tmp = ocfs2_request_umount_vote(osb); 1164 if (tmp < 0) 1165 mlog_errno(tmp); 1166 1167 if (osb->slot_num != OCFS2_INVALID_SLOT) 1168 ocfs2_put_slot(osb); 1169 1170 ocfs2_super_unlock(osb, 1); 1171 } 1172 1173 ocfs2_release_system_inodes(osb); 1174 1175 if (osb->dlm) { 1176 ocfs2_unregister_net_handlers(osb); 1177 1178 ocfs2_dlm_shutdown(osb); 1179 } 1180 1181 ocfs2_clear_hb_callbacks(osb); 1182 1183 debugfs_remove(osb->osb_debug_root); 1184 1185 if (!mnt_err) 1186 ocfs2_stop_heartbeat(osb); 1187 1188 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1189 1190 printk("ocfs2: Unmounting device (%u,%u) on (node %d)\n", 1191 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev), osb->node_num); 1192 1193 ocfs2_delete_osb(osb); 1194 kfree(osb); 1195 sb->s_dev = 0; 1196 sb->s_fs_info = NULL; 1197 } 1198 1199 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1200 unsigned uuid_bytes) 1201 { 1202 int i, ret; 1203 char *ptr; 1204 1205 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1206 1207 osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1208 if (osb->uuid_str == NULL) 1209 return -ENOMEM; 1210 1211 memcpy(osb->uuid, uuid, OCFS2_VOL_UUID_LEN); 1212 1213 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1214 /* print with null */ 1215 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1216 if (ret != 2) /* drop super cleans up */ 1217 return -EINVAL; 1218 /* then only advance past the last char */ 1219 ptr += 2; 1220 } 1221 1222 return 0; 1223 } 1224 1225 static int ocfs2_initialize_super(struct super_block *sb, 1226 struct buffer_head *bh, 1227 int sector_size) 1228 { 1229 int status = 0; 1230 int i; 1231 struct ocfs2_dinode *di = NULL; 1232 struct inode *inode = NULL; 1233 struct buffer_head *bitmap_bh = NULL; 1234 struct ocfs2_journal *journal; 1235 __le32 uuid_net_key; 1236 struct ocfs2_super *osb; 1237 1238 mlog_entry_void(); 1239 1240 osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL); 1241 if (!osb) { 1242 status = -ENOMEM; 1243 mlog_errno(status); 1244 goto bail; 1245 } 1246 1247 sb->s_fs_info = osb; 1248 sb->s_op = &ocfs2_sops; 1249 sb->s_export_op = &ocfs2_export_ops; 1250 sb->s_flags |= MS_NOATIME; 1251 /* this is needed to support O_LARGEFILE */ 1252 sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits); 1253 1254 osb->sb = sb; 1255 /* Save off for ocfs2_rw_direct */ 1256 osb->s_sectsize_bits = blksize_bits(sector_size); 1257 if (!osb->s_sectsize_bits) 1258 BUG(); 1259 1260 osb->net_response_ids = 0; 1261 spin_lock_init(&osb->net_response_lock); 1262 INIT_LIST_HEAD(&osb->net_response_list); 1263 1264 INIT_LIST_HEAD(&osb->osb_net_handlers); 1265 init_waitqueue_head(&osb->recovery_event); 1266 spin_lock_init(&osb->vote_task_lock); 1267 init_waitqueue_head(&osb->vote_event); 1268 osb->vote_work_sequence = 0; 1269 osb->vote_wake_sequence = 0; 1270 INIT_LIST_HEAD(&osb->blocked_lock_list); 1271 osb->blocked_lock_count = 0; 1272 INIT_LIST_HEAD(&osb->vote_list); 1273 spin_lock_init(&osb->osb_lock); 1274 1275 atomic_set(&osb->alloc_stats.moves, 0); 1276 atomic_set(&osb->alloc_stats.local_data, 0); 1277 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1278 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1279 atomic_set(&osb->alloc_stats.bg_extends, 0); 1280 1281 ocfs2_init_node_maps(osb); 1282 1283 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1284 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1285 1286 init_MUTEX(&osb->recovery_lock); 1287 1288 osb->disable_recovery = 0; 1289 osb->recovery_thread_task = NULL; 1290 1291 init_waitqueue_head(&osb->checkpoint_event); 1292 atomic_set(&osb->needs_checkpoint, 0); 1293 1294 osb->node_num = O2NM_INVALID_NODE_NUM; 1295 osb->slot_num = OCFS2_INVALID_SLOT; 1296 1297 osb->local_alloc_state = OCFS2_LA_UNUSED; 1298 osb->local_alloc_bh = NULL; 1299 1300 ocfs2_setup_hb_callbacks(osb); 1301 1302 init_waitqueue_head(&osb->osb_mount_event); 1303 1304 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1305 if (!osb->vol_label) { 1306 mlog(ML_ERROR, "unable to alloc vol label\n"); 1307 status = -ENOMEM; 1308 goto bail; 1309 } 1310 1311 osb->uuid = kmalloc(OCFS2_VOL_UUID_LEN, GFP_KERNEL); 1312 if (!osb->uuid) { 1313 mlog(ML_ERROR, "unable to alloc uuid\n"); 1314 status = -ENOMEM; 1315 goto bail; 1316 } 1317 1318 di = (struct ocfs2_dinode *)bh->b_data; 1319 1320 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1321 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1322 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1323 osb->max_slots); 1324 status = -EINVAL; 1325 goto bail; 1326 } 1327 mlog(ML_NOTICE, "max_slots for this device: %u\n", osb->max_slots); 1328 1329 osb->s_feature_compat = 1330 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 1331 osb->s_feature_ro_compat = 1332 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 1333 osb->s_feature_incompat = 1334 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 1335 1336 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 1337 mlog(ML_ERROR, "couldn't mount because of unsupported " 1338 "optional features (%x).\n", i); 1339 status = -EINVAL; 1340 goto bail; 1341 } 1342 if (!(osb->sb->s_flags & MS_RDONLY) && 1343 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 1344 mlog(ML_ERROR, "couldn't mount RDWR because of " 1345 "unsupported optional features (%x).\n", i); 1346 status = -EINVAL; 1347 goto bail; 1348 } 1349 1350 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 1351 1352 /* FIXME 1353 * This should be done in ocfs2_journal_init(), but unknown 1354 * ordering issues will cause the filesystem to crash. 1355 * If anyone wants to figure out what part of the code 1356 * refers to osb->journal before ocfs2_journal_init() is run, 1357 * be my guest. 1358 */ 1359 /* initialize our journal structure */ 1360 1361 journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL); 1362 if (!journal) { 1363 mlog(ML_ERROR, "unable to alloc journal\n"); 1364 status = -ENOMEM; 1365 goto bail; 1366 } 1367 osb->journal = journal; 1368 journal->j_osb = osb; 1369 1370 atomic_set(&journal->j_num_trans, 0); 1371 init_rwsem(&journal->j_trans_barrier); 1372 init_waitqueue_head(&journal->j_checkpointed); 1373 spin_lock_init(&journal->j_lock); 1374 journal->j_trans_id = (unsigned long) 1; 1375 INIT_LIST_HEAD(&journal->j_la_cleanups); 1376 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery, osb); 1377 journal->j_state = OCFS2_JOURNAL_FREE; 1378 1379 /* get some pseudo constants for clustersize bits */ 1380 osb->s_clustersize_bits = 1381 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1382 osb->s_clustersize = 1 << osb->s_clustersize_bits; 1383 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 1384 1385 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 1386 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 1387 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 1388 osb->s_clustersize); 1389 status = -EINVAL; 1390 goto bail; 1391 } 1392 1393 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 1394 > (u32)~0UL) { 1395 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 1396 "what jbd can address in 32 bits.\n"); 1397 status = -EINVAL; 1398 goto bail; 1399 } 1400 1401 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 1402 sizeof(di->id2.i_super.s_uuid))) { 1403 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 1404 status = -ENOMEM; 1405 goto bail; 1406 } 1407 1408 memcpy(&uuid_net_key, &osb->uuid[i], sizeof(osb->net_key)); 1409 osb->net_key = le32_to_cpu(uuid_net_key); 1410 1411 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 1412 osb->vol_label[63] = '\0'; 1413 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 1414 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 1415 osb->first_cluster_group_blkno = 1416 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 1417 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 1418 mlog(0, "vol_label: %s\n", osb->vol_label); 1419 mlog(0, "uuid: %s\n", osb->uuid_str); 1420 mlog(0, "root_blkno=%"MLFu64", system_dir_blkno=%"MLFu64"\n", 1421 osb->root_blkno, osb->system_dir_blkno); 1422 1423 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 1424 if (!osb->osb_dlm_debug) { 1425 status = -ENOMEM; 1426 mlog_errno(status); 1427 goto bail; 1428 } 1429 1430 atomic_set(&osb->vol_state, VOLUME_INIT); 1431 1432 /* load root, system_dir, and all global system inodes */ 1433 status = ocfs2_init_global_system_inodes(osb); 1434 if (status < 0) { 1435 mlog_errno(status); 1436 goto bail; 1437 } 1438 1439 /* 1440 * global bitmap 1441 */ 1442 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 1443 OCFS2_INVALID_SLOT); 1444 if (!inode) { 1445 status = -EINVAL; 1446 mlog_errno(status); 1447 goto bail; 1448 } 1449 1450 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 1451 1452 status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0, 1453 inode); 1454 iput(inode); 1455 if (status < 0) { 1456 mlog_errno(status); 1457 goto bail; 1458 } 1459 1460 di = (struct ocfs2_dinode *) bitmap_bh->b_data; 1461 osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg); 1462 osb->num_clusters = le32_to_cpu(di->id1.bitmap1.i_total); 1463 brelse(bitmap_bh); 1464 mlog(0, "cluster bitmap inode: %"MLFu64", clusters per group: %u\n", 1465 osb->bitmap_blkno, osb->bitmap_cpg); 1466 1467 status = ocfs2_init_slot_info(osb); 1468 if (status < 0) { 1469 mlog_errno(status); 1470 goto bail; 1471 } 1472 1473 /* Link this osb onto the global linked list of all osb structures. */ 1474 /* The Global Link List is mainted for the whole driver . */ 1475 spin_lock(&ocfs2_globals_lock); 1476 osb->osb_id = osb_id; 1477 if (osb_id < OCFS2_MAX_OSB_ID) 1478 osb_id++; 1479 else { 1480 mlog(ML_ERROR, "Too many volumes mounted\n"); 1481 status = -ENOMEM; 1482 } 1483 spin_unlock(&ocfs2_globals_lock); 1484 1485 bail: 1486 mlog_exit(status); 1487 return status; 1488 } 1489 1490 /* 1491 * will return: -EAGAIN if it is ok to keep searching for superblocks 1492 * -EINVAL if there is a bad superblock 1493 * 0 on success 1494 */ 1495 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 1496 struct buffer_head *bh, 1497 u32 blksz) 1498 { 1499 int status = -EAGAIN; 1500 1501 mlog_entry_void(); 1502 1503 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 1504 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 1505 status = -EINVAL; 1506 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 1507 mlog(ML_ERROR, "found superblock with incorrect block " 1508 "size: found %u, should be %u\n", 1509 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 1510 blksz); 1511 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 1512 OCFS2_MAJOR_REV_LEVEL || 1513 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 1514 OCFS2_MINOR_REV_LEVEL) { 1515 mlog(ML_ERROR, "found superblock with bad version: " 1516 "found %u.%u, should be %u.%u\n", 1517 le16_to_cpu(di->id2.i_super.s_major_rev_level), 1518 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 1519 OCFS2_MAJOR_REV_LEVEL, 1520 OCFS2_MINOR_REV_LEVEL); 1521 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 1522 mlog(ML_ERROR, "bad block number on superblock: " 1523 "found %"MLFu64", should be %llu\n", 1524 di->i_blkno, (unsigned long long)bh->b_blocknr); 1525 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 1526 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 1527 mlog(ML_ERROR, "bad cluster size found: %u\n", 1528 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 1529 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 1530 mlog(ML_ERROR, "bad root_blkno: 0\n"); 1531 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 1532 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 1533 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 1534 mlog(ML_ERROR, 1535 "Superblock slots found greater than file system " 1536 "maximum: found %u, max %u\n", 1537 le16_to_cpu(di->id2.i_super.s_max_slots), 1538 OCFS2_MAX_SLOTS); 1539 } else { 1540 /* found it! */ 1541 status = 0; 1542 } 1543 } 1544 1545 mlog_exit(status); 1546 return status; 1547 } 1548 1549 static int ocfs2_check_volume(struct ocfs2_super *osb) 1550 { 1551 int status = 0; 1552 int dirty; 1553 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 1554 * recover 1555 * ourselves. */ 1556 1557 mlog_entry_void(); 1558 1559 /* Init our journal object. */ 1560 status = ocfs2_journal_init(osb->journal, &dirty); 1561 if (status < 0) { 1562 mlog(ML_ERROR, "Could not initialize journal!\n"); 1563 goto finally; 1564 } 1565 1566 /* If the journal was unmounted cleanly then we don't want to 1567 * recover anything. Otherwise, journal_load will do that 1568 * dirty work for us :) */ 1569 if (!dirty) { 1570 status = ocfs2_journal_wipe(osb->journal, 0); 1571 if (status < 0) { 1572 mlog_errno(status); 1573 goto finally; 1574 } 1575 } else { 1576 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 1577 "recovering volume.\n"); 1578 } 1579 1580 /* will play back anything left in the journal. */ 1581 ocfs2_journal_load(osb->journal); 1582 1583 if (dirty) { 1584 /* recover my local alloc if we didn't unmount cleanly. */ 1585 status = ocfs2_begin_local_alloc_recovery(osb, 1586 osb->slot_num, 1587 &local_alloc); 1588 if (status < 0) { 1589 mlog_errno(status); 1590 goto finally; 1591 } 1592 /* we complete the recovery process after we've marked 1593 * ourselves as mounted. */ 1594 } 1595 1596 mlog(0, "Journal loaded.\n"); 1597 1598 status = ocfs2_load_local_alloc(osb); 1599 if (status < 0) { 1600 mlog_errno(status); 1601 goto finally; 1602 } 1603 1604 if (dirty) { 1605 /* Recovery will be completed after we've mounted the 1606 * rest of the volume. */ 1607 osb->dirty = 1; 1608 osb->local_alloc_copy = local_alloc; 1609 local_alloc = NULL; 1610 } 1611 1612 /* go through each journal, trylock it and if you get the 1613 * lock, and it's marked as dirty, set the bit in the recover 1614 * map and launch a recovery thread for it. */ 1615 status = ocfs2_mark_dead_nodes(osb); 1616 if (status < 0) 1617 mlog_errno(status); 1618 1619 finally: 1620 if (local_alloc) 1621 kfree(local_alloc); 1622 1623 mlog_exit(status); 1624 return status; 1625 } 1626 1627 /* 1628 * The routine gets called from dismount or close whenever a dismount on 1629 * volume is requested and the osb open count becomes 1. 1630 * It will remove the osb from the global list and also free up all the 1631 * initialized resources and fileobject. 1632 */ 1633 static void ocfs2_delete_osb(struct ocfs2_super *osb) 1634 { 1635 mlog_entry_void(); 1636 1637 /* This function assumes that the caller has the main osb resource */ 1638 1639 if (osb->slot_info) 1640 ocfs2_free_slot_info(osb->slot_info); 1641 1642 /* FIXME 1643 * This belongs in journal shutdown, but because we have to 1644 * allocate osb->journal at the start of ocfs2_initalize_osb(), 1645 * we free it here. 1646 */ 1647 kfree(osb->journal); 1648 if (osb->local_alloc_copy) 1649 kfree(osb->local_alloc_copy); 1650 kfree(osb->uuid_str); 1651 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 1652 memset(osb, 0, sizeof(struct ocfs2_super)); 1653 1654 mlog_exit_void(); 1655 } 1656 1657 /* Put OCFS2 into a readonly state, or (if the user specifies it), 1658 * panic(). We do not support continue-on-error operation. */ 1659 static void ocfs2_handle_error(struct super_block *sb) 1660 { 1661 struct ocfs2_super *osb = OCFS2_SB(sb); 1662 1663 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 1664 panic("OCFS2: (device %s): panic forced after error\n", 1665 sb->s_id); 1666 1667 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 1668 1669 if (sb->s_flags & MS_RDONLY && 1670 (ocfs2_is_soft_readonly(osb) || 1671 ocfs2_is_hard_readonly(osb))) 1672 return; 1673 1674 printk(KERN_CRIT "File system is now read-only due to the potential " 1675 "of on-disk corruption. Please run fsck.ocfs2 once the file " 1676 "system is unmounted.\n"); 1677 sb->s_flags |= MS_RDONLY; 1678 ocfs2_set_ro_flag(osb, 0); 1679 } 1680 1681 static char error_buf[1024]; 1682 1683 void __ocfs2_error(struct super_block *sb, 1684 const char *function, 1685 const char *fmt, ...) 1686 { 1687 va_list args; 1688 1689 va_start(args, fmt); 1690 vsprintf(error_buf, fmt, args); 1691 va_end(args); 1692 1693 /* Not using mlog here because we want to show the actual 1694 * function the error came from. */ 1695 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 1696 sb->s_id, function, error_buf); 1697 1698 ocfs2_handle_error(sb); 1699 } 1700 1701 /* Handle critical errors. This is intentionally more drastic than 1702 * ocfs2_handle_error, so we only use for things like journal errors, 1703 * etc. */ 1704 void __ocfs2_abort(struct super_block* sb, 1705 const char *function, 1706 const char *fmt, ...) 1707 { 1708 va_list args; 1709 1710 va_start(args, fmt); 1711 vsprintf(error_buf, fmt, args); 1712 va_end(args); 1713 1714 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 1715 sb->s_id, function, error_buf); 1716 1717 /* We don't have the cluster support yet to go straight to 1718 * hard readonly in here. Until then, we want to keep 1719 * ocfs2_abort() so that we can at least mark critical 1720 * errors. 1721 * 1722 * TODO: This should abort the journal and alert other nodes 1723 * that our slot needs recovery. */ 1724 1725 /* Force a panic(). This stinks, but it's better than letting 1726 * things continue without having a proper hard readonly 1727 * here. */ 1728 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1729 ocfs2_handle_error(sb); 1730 } 1731 1732 module_init(ocfs2_init); 1733 module_exit(ocfs2_exit); 1734