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 mutex_init(&oi->ip_io_mutex); 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, 955 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 956 SLAB_MEM_SPREAD), 957 ocfs2_inode_init_once, NULL); 958 if (!ocfs2_inode_cachep) 959 return -ENOMEM; 960 961 ocfs2_lock_cache = kmem_cache_create("ocfs2_lock", 962 sizeof(struct ocfs2_journal_lock), 963 0, 964 SLAB_HWCACHE_ALIGN, 965 NULL, NULL); 966 if (!ocfs2_lock_cache) 967 return -ENOMEM; 968 969 return 0; 970 } 971 972 static void ocfs2_free_mem_caches(void) 973 { 974 if (ocfs2_inode_cachep) 975 kmem_cache_destroy(ocfs2_inode_cachep); 976 if (ocfs2_lock_cache) 977 kmem_cache_destroy(ocfs2_lock_cache); 978 979 ocfs2_inode_cachep = NULL; 980 ocfs2_lock_cache = NULL; 981 } 982 983 static int ocfs2_get_sector(struct super_block *sb, 984 struct buffer_head **bh, 985 int block, 986 int sect_size) 987 { 988 if (!sb_set_blocksize(sb, sect_size)) { 989 mlog(ML_ERROR, "unable to set blocksize\n"); 990 return -EIO; 991 } 992 993 *bh = sb_getblk(sb, block); 994 if (!*bh) { 995 mlog_errno(-EIO); 996 return -EIO; 997 } 998 lock_buffer(*bh); 999 if (!buffer_dirty(*bh)) 1000 clear_buffer_uptodate(*bh); 1001 unlock_buffer(*bh); 1002 ll_rw_block(READ, 1, bh); 1003 wait_on_buffer(*bh); 1004 return 0; 1005 } 1006 1007 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */ 1008 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) 1009 { 1010 int status; 1011 1012 /* XXX hold a ref on the node while mounte? easy enough, if 1013 * desirable. */ 1014 osb->node_num = o2nm_this_node(); 1015 if (osb->node_num == O2NM_MAX_NODES) { 1016 mlog(ML_ERROR, "could not find this host's node number\n"); 1017 status = -ENOENT; 1018 goto bail; 1019 } 1020 1021 mlog(ML_NOTICE, "I am node %d\n", osb->node_num); 1022 1023 status = 0; 1024 bail: 1025 return status; 1026 } 1027 1028 static int ocfs2_mount_volume(struct super_block *sb) 1029 { 1030 int status = 0; 1031 int unlock_super = 0; 1032 struct ocfs2_super *osb = OCFS2_SB(sb); 1033 1034 mlog_entry_void(); 1035 1036 if (ocfs2_is_hard_readonly(osb)) 1037 goto leave; 1038 1039 status = ocfs2_fill_local_node_info(osb); 1040 if (status < 0) { 1041 mlog_errno(status); 1042 goto leave; 1043 } 1044 1045 status = ocfs2_register_hb_callbacks(osb); 1046 if (status < 0) { 1047 mlog_errno(status); 1048 goto leave; 1049 } 1050 1051 status = ocfs2_dlm_init(osb); 1052 if (status < 0) { 1053 mlog_errno(status); 1054 goto leave; 1055 } 1056 1057 /* requires vote_thread to be running. */ 1058 status = ocfs2_register_net_handlers(osb); 1059 if (status < 0) { 1060 mlog_errno(status); 1061 goto leave; 1062 } 1063 1064 status = ocfs2_super_lock(osb, 1); 1065 if (status < 0) { 1066 mlog_errno(status); 1067 goto leave; 1068 } 1069 unlock_super = 1; 1070 1071 /* This will load up the node map and add ourselves to it. */ 1072 status = ocfs2_find_slot(osb); 1073 if (status < 0) { 1074 mlog_errno(status); 1075 goto leave; 1076 } 1077 1078 ocfs2_populate_mounted_map(osb); 1079 1080 /* load all node-local system inodes */ 1081 status = ocfs2_init_local_system_inodes(osb); 1082 if (status < 0) { 1083 mlog_errno(status); 1084 goto leave; 1085 } 1086 1087 status = ocfs2_check_volume(osb); 1088 if (status < 0) { 1089 mlog_errno(status); 1090 goto leave; 1091 } 1092 1093 status = ocfs2_truncate_log_init(osb); 1094 if (status < 0) { 1095 mlog_errno(status); 1096 goto leave; 1097 } 1098 1099 /* This should be sent *after* we recovered our journal as it 1100 * will cause other nodes to unmark us as needing 1101 * recovery. However, we need to send it *before* dropping the 1102 * super block lock as otherwise their recovery threads might 1103 * try to clean us up while we're live! */ 1104 status = ocfs2_request_mount_vote(osb); 1105 if (status < 0) 1106 mlog_errno(status); 1107 1108 leave: 1109 if (unlock_super) 1110 ocfs2_super_unlock(osb, 1); 1111 1112 mlog_exit(status); 1113 return status; 1114 } 1115 1116 /* we can't grab the goofy sem lock from inside wait_event, so we use 1117 * memory barriers to make sure that we'll see the null task before 1118 * being woken up */ 1119 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) 1120 { 1121 mb(); 1122 return osb->recovery_thread_task != NULL; 1123 } 1124 1125 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1126 { 1127 int tmp; 1128 struct ocfs2_super *osb = NULL; 1129 1130 mlog_entry("(0x%p)\n", sb); 1131 1132 BUG_ON(!sb); 1133 osb = OCFS2_SB(sb); 1134 BUG_ON(!osb); 1135 1136 ocfs2_shutdown_local_alloc(osb); 1137 1138 ocfs2_truncate_log_shutdown(osb); 1139 1140 /* disable any new recovery threads and wait for any currently 1141 * running ones to exit. Do this before setting the vol_state. */ 1142 mutex_lock(&osb->recovery_lock); 1143 osb->disable_recovery = 1; 1144 mutex_unlock(&osb->recovery_lock); 1145 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); 1146 1147 /* At this point, we know that no more recovery threads can be 1148 * launched, so wait for any recovery completion work to 1149 * complete. */ 1150 flush_workqueue(ocfs2_wq); 1151 1152 ocfs2_journal_shutdown(osb); 1153 1154 ocfs2_sync_blockdev(sb); 1155 1156 /* No dlm means we've failed during mount, so skip all the 1157 * steps which depended on that to complete. */ 1158 if (osb->dlm) { 1159 tmp = ocfs2_super_lock(osb, 1); 1160 if (tmp < 0) { 1161 mlog_errno(tmp); 1162 return; 1163 } 1164 1165 tmp = ocfs2_request_umount_vote(osb); 1166 if (tmp < 0) 1167 mlog_errno(tmp); 1168 1169 if (osb->slot_num != OCFS2_INVALID_SLOT) 1170 ocfs2_put_slot(osb); 1171 1172 ocfs2_super_unlock(osb, 1); 1173 } 1174 1175 ocfs2_release_system_inodes(osb); 1176 1177 if (osb->dlm) { 1178 ocfs2_unregister_net_handlers(osb); 1179 1180 ocfs2_dlm_shutdown(osb); 1181 } 1182 1183 ocfs2_clear_hb_callbacks(osb); 1184 1185 debugfs_remove(osb->osb_debug_root); 1186 1187 if (!mnt_err) 1188 ocfs2_stop_heartbeat(osb); 1189 1190 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1191 1192 printk("ocfs2: Unmounting device (%u,%u) on (node %d)\n", 1193 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev), osb->node_num); 1194 1195 ocfs2_delete_osb(osb); 1196 kfree(osb); 1197 sb->s_dev = 0; 1198 sb->s_fs_info = NULL; 1199 } 1200 1201 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1202 unsigned uuid_bytes) 1203 { 1204 int i, ret; 1205 char *ptr; 1206 1207 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1208 1209 osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1210 if (osb->uuid_str == NULL) 1211 return -ENOMEM; 1212 1213 memcpy(osb->uuid, uuid, OCFS2_VOL_UUID_LEN); 1214 1215 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1216 /* print with null */ 1217 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1218 if (ret != 2) /* drop super cleans up */ 1219 return -EINVAL; 1220 /* then only advance past the last char */ 1221 ptr += 2; 1222 } 1223 1224 return 0; 1225 } 1226 1227 static int ocfs2_initialize_super(struct super_block *sb, 1228 struct buffer_head *bh, 1229 int sector_size) 1230 { 1231 int status = 0; 1232 int i; 1233 struct ocfs2_dinode *di = NULL; 1234 struct inode *inode = NULL; 1235 struct buffer_head *bitmap_bh = NULL; 1236 struct ocfs2_journal *journal; 1237 __le32 uuid_net_key; 1238 struct ocfs2_super *osb; 1239 1240 mlog_entry_void(); 1241 1242 osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL); 1243 if (!osb) { 1244 status = -ENOMEM; 1245 mlog_errno(status); 1246 goto bail; 1247 } 1248 1249 sb->s_fs_info = osb; 1250 sb->s_op = &ocfs2_sops; 1251 sb->s_export_op = &ocfs2_export_ops; 1252 sb->s_flags |= MS_NOATIME; 1253 /* this is needed to support O_LARGEFILE */ 1254 sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits); 1255 1256 osb->sb = sb; 1257 /* Save off for ocfs2_rw_direct */ 1258 osb->s_sectsize_bits = blksize_bits(sector_size); 1259 BUG_ON(!osb->s_sectsize_bits); 1260 1261 osb->net_response_ids = 0; 1262 spin_lock_init(&osb->net_response_lock); 1263 INIT_LIST_HEAD(&osb->net_response_list); 1264 1265 INIT_LIST_HEAD(&osb->osb_net_handlers); 1266 init_waitqueue_head(&osb->recovery_event); 1267 spin_lock_init(&osb->vote_task_lock); 1268 init_waitqueue_head(&osb->vote_event); 1269 osb->vote_work_sequence = 0; 1270 osb->vote_wake_sequence = 0; 1271 INIT_LIST_HEAD(&osb->blocked_lock_list); 1272 osb->blocked_lock_count = 0; 1273 INIT_LIST_HEAD(&osb->vote_list); 1274 spin_lock_init(&osb->osb_lock); 1275 1276 atomic_set(&osb->alloc_stats.moves, 0); 1277 atomic_set(&osb->alloc_stats.local_data, 0); 1278 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1279 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1280 atomic_set(&osb->alloc_stats.bg_extends, 0); 1281 1282 ocfs2_init_node_maps(osb); 1283 1284 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1285 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1286 1287 mutex_init(&osb->recovery_lock); 1288 1289 osb->disable_recovery = 0; 1290 osb->recovery_thread_task = NULL; 1291 1292 init_waitqueue_head(&osb->checkpoint_event); 1293 atomic_set(&osb->needs_checkpoint, 0); 1294 1295 osb->node_num = O2NM_INVALID_NODE_NUM; 1296 osb->slot_num = OCFS2_INVALID_SLOT; 1297 1298 osb->local_alloc_state = OCFS2_LA_UNUSED; 1299 osb->local_alloc_bh = NULL; 1300 1301 ocfs2_setup_hb_callbacks(osb); 1302 1303 init_waitqueue_head(&osb->osb_mount_event); 1304 1305 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1306 if (!osb->vol_label) { 1307 mlog(ML_ERROR, "unable to alloc vol label\n"); 1308 status = -ENOMEM; 1309 goto bail; 1310 } 1311 1312 osb->uuid = kmalloc(OCFS2_VOL_UUID_LEN, GFP_KERNEL); 1313 if (!osb->uuid) { 1314 mlog(ML_ERROR, "unable to alloc uuid\n"); 1315 status = -ENOMEM; 1316 goto bail; 1317 } 1318 1319 di = (struct ocfs2_dinode *)bh->b_data; 1320 1321 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1322 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1323 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1324 osb->max_slots); 1325 status = -EINVAL; 1326 goto bail; 1327 } 1328 mlog(ML_NOTICE, "max_slots for this device: %u\n", osb->max_slots); 1329 1330 init_waitqueue_head(&osb->osb_wipe_event); 1331 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 1332 sizeof(*osb->osb_orphan_wipes), 1333 GFP_KERNEL); 1334 if (!osb->osb_orphan_wipes) { 1335 status = -ENOMEM; 1336 mlog_errno(status); 1337 goto bail; 1338 } 1339 1340 osb->s_feature_compat = 1341 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 1342 osb->s_feature_ro_compat = 1343 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 1344 osb->s_feature_incompat = 1345 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 1346 1347 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 1348 mlog(ML_ERROR, "couldn't mount because of unsupported " 1349 "optional features (%x).\n", i); 1350 status = -EINVAL; 1351 goto bail; 1352 } 1353 if (!(osb->sb->s_flags & MS_RDONLY) && 1354 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 1355 mlog(ML_ERROR, "couldn't mount RDWR because of " 1356 "unsupported optional features (%x).\n", i); 1357 status = -EINVAL; 1358 goto bail; 1359 } 1360 1361 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 1362 1363 /* FIXME 1364 * This should be done in ocfs2_journal_init(), but unknown 1365 * ordering issues will cause the filesystem to crash. 1366 * If anyone wants to figure out what part of the code 1367 * refers to osb->journal before ocfs2_journal_init() is run, 1368 * be my guest. 1369 */ 1370 /* initialize our journal structure */ 1371 1372 journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL); 1373 if (!journal) { 1374 mlog(ML_ERROR, "unable to alloc journal\n"); 1375 status = -ENOMEM; 1376 goto bail; 1377 } 1378 osb->journal = journal; 1379 journal->j_osb = osb; 1380 1381 atomic_set(&journal->j_num_trans, 0); 1382 init_rwsem(&journal->j_trans_barrier); 1383 init_waitqueue_head(&journal->j_checkpointed); 1384 spin_lock_init(&journal->j_lock); 1385 journal->j_trans_id = (unsigned long) 1; 1386 INIT_LIST_HEAD(&journal->j_la_cleanups); 1387 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery, osb); 1388 journal->j_state = OCFS2_JOURNAL_FREE; 1389 1390 /* get some pseudo constants for clustersize bits */ 1391 osb->s_clustersize_bits = 1392 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1393 osb->s_clustersize = 1 << osb->s_clustersize_bits; 1394 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 1395 1396 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 1397 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 1398 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 1399 osb->s_clustersize); 1400 status = -EINVAL; 1401 goto bail; 1402 } 1403 1404 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 1405 > (u32)~0UL) { 1406 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 1407 "what jbd can address in 32 bits.\n"); 1408 status = -EINVAL; 1409 goto bail; 1410 } 1411 1412 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 1413 sizeof(di->id2.i_super.s_uuid))) { 1414 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 1415 status = -ENOMEM; 1416 goto bail; 1417 } 1418 1419 memcpy(&uuid_net_key, &osb->uuid[i], sizeof(osb->net_key)); 1420 osb->net_key = le32_to_cpu(uuid_net_key); 1421 1422 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 1423 osb->vol_label[63] = '\0'; 1424 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 1425 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 1426 osb->first_cluster_group_blkno = 1427 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 1428 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 1429 mlog(0, "vol_label: %s\n", osb->vol_label); 1430 mlog(0, "uuid: %s\n", osb->uuid_str); 1431 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 1432 (unsigned long long)osb->root_blkno, 1433 (unsigned long long)osb->system_dir_blkno); 1434 1435 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 1436 if (!osb->osb_dlm_debug) { 1437 status = -ENOMEM; 1438 mlog_errno(status); 1439 goto bail; 1440 } 1441 1442 atomic_set(&osb->vol_state, VOLUME_INIT); 1443 1444 /* load root, system_dir, and all global system inodes */ 1445 status = ocfs2_init_global_system_inodes(osb); 1446 if (status < 0) { 1447 mlog_errno(status); 1448 goto bail; 1449 } 1450 1451 /* 1452 * global bitmap 1453 */ 1454 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 1455 OCFS2_INVALID_SLOT); 1456 if (!inode) { 1457 status = -EINVAL; 1458 mlog_errno(status); 1459 goto bail; 1460 } 1461 1462 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 1463 1464 status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0, 1465 inode); 1466 iput(inode); 1467 if (status < 0) { 1468 mlog_errno(status); 1469 goto bail; 1470 } 1471 1472 di = (struct ocfs2_dinode *) bitmap_bh->b_data; 1473 osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg); 1474 osb->num_clusters = le32_to_cpu(di->id1.bitmap1.i_total); 1475 brelse(bitmap_bh); 1476 mlog(0, "cluster bitmap inode: %llu, clusters per group: %u\n", 1477 (unsigned long long)osb->bitmap_blkno, osb->bitmap_cpg); 1478 1479 status = ocfs2_init_slot_info(osb); 1480 if (status < 0) { 1481 mlog_errno(status); 1482 goto bail; 1483 } 1484 1485 /* Link this osb onto the global linked list of all osb structures. */ 1486 /* The Global Link List is mainted for the whole driver . */ 1487 spin_lock(&ocfs2_globals_lock); 1488 osb->osb_id = osb_id; 1489 if (osb_id < OCFS2_MAX_OSB_ID) 1490 osb_id++; 1491 else { 1492 mlog(ML_ERROR, "Too many volumes mounted\n"); 1493 status = -ENOMEM; 1494 } 1495 spin_unlock(&ocfs2_globals_lock); 1496 1497 bail: 1498 mlog_exit(status); 1499 return status; 1500 } 1501 1502 /* 1503 * will return: -EAGAIN if it is ok to keep searching for superblocks 1504 * -EINVAL if there is a bad superblock 1505 * 0 on success 1506 */ 1507 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 1508 struct buffer_head *bh, 1509 u32 blksz) 1510 { 1511 int status = -EAGAIN; 1512 1513 mlog_entry_void(); 1514 1515 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 1516 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 1517 status = -EINVAL; 1518 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 1519 mlog(ML_ERROR, "found superblock with incorrect block " 1520 "size: found %u, should be %u\n", 1521 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 1522 blksz); 1523 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 1524 OCFS2_MAJOR_REV_LEVEL || 1525 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 1526 OCFS2_MINOR_REV_LEVEL) { 1527 mlog(ML_ERROR, "found superblock with bad version: " 1528 "found %u.%u, should be %u.%u\n", 1529 le16_to_cpu(di->id2.i_super.s_major_rev_level), 1530 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 1531 OCFS2_MAJOR_REV_LEVEL, 1532 OCFS2_MINOR_REV_LEVEL); 1533 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 1534 mlog(ML_ERROR, "bad block number on superblock: " 1535 "found %llu, should be %llu\n", 1536 (unsigned long long)di->i_blkno, 1537 (unsigned long long)bh->b_blocknr); 1538 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 1539 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 1540 mlog(ML_ERROR, "bad cluster size found: %u\n", 1541 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 1542 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 1543 mlog(ML_ERROR, "bad root_blkno: 0\n"); 1544 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 1545 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 1546 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 1547 mlog(ML_ERROR, 1548 "Superblock slots found greater than file system " 1549 "maximum: found %u, max %u\n", 1550 le16_to_cpu(di->id2.i_super.s_max_slots), 1551 OCFS2_MAX_SLOTS); 1552 } else { 1553 /* found it! */ 1554 status = 0; 1555 } 1556 } 1557 1558 mlog_exit(status); 1559 return status; 1560 } 1561 1562 static int ocfs2_check_volume(struct ocfs2_super *osb) 1563 { 1564 int status = 0; 1565 int dirty; 1566 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 1567 * recover 1568 * ourselves. */ 1569 1570 mlog_entry_void(); 1571 1572 /* Init our journal object. */ 1573 status = ocfs2_journal_init(osb->journal, &dirty); 1574 if (status < 0) { 1575 mlog(ML_ERROR, "Could not initialize journal!\n"); 1576 goto finally; 1577 } 1578 1579 /* If the journal was unmounted cleanly then we don't want to 1580 * recover anything. Otherwise, journal_load will do that 1581 * dirty work for us :) */ 1582 if (!dirty) { 1583 status = ocfs2_journal_wipe(osb->journal, 0); 1584 if (status < 0) { 1585 mlog_errno(status); 1586 goto finally; 1587 } 1588 } else { 1589 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 1590 "recovering volume.\n"); 1591 } 1592 1593 /* will play back anything left in the journal. */ 1594 ocfs2_journal_load(osb->journal); 1595 1596 if (dirty) { 1597 /* recover my local alloc if we didn't unmount cleanly. */ 1598 status = ocfs2_begin_local_alloc_recovery(osb, 1599 osb->slot_num, 1600 &local_alloc); 1601 if (status < 0) { 1602 mlog_errno(status); 1603 goto finally; 1604 } 1605 /* we complete the recovery process after we've marked 1606 * ourselves as mounted. */ 1607 } 1608 1609 mlog(0, "Journal loaded.\n"); 1610 1611 status = ocfs2_load_local_alloc(osb); 1612 if (status < 0) { 1613 mlog_errno(status); 1614 goto finally; 1615 } 1616 1617 if (dirty) { 1618 /* Recovery will be completed after we've mounted the 1619 * rest of the volume. */ 1620 osb->dirty = 1; 1621 osb->local_alloc_copy = local_alloc; 1622 local_alloc = NULL; 1623 } 1624 1625 /* go through each journal, trylock it and if you get the 1626 * lock, and it's marked as dirty, set the bit in the recover 1627 * map and launch a recovery thread for it. */ 1628 status = ocfs2_mark_dead_nodes(osb); 1629 if (status < 0) 1630 mlog_errno(status); 1631 1632 finally: 1633 if (local_alloc) 1634 kfree(local_alloc); 1635 1636 mlog_exit(status); 1637 return status; 1638 } 1639 1640 /* 1641 * The routine gets called from dismount or close whenever a dismount on 1642 * volume is requested and the osb open count becomes 1. 1643 * It will remove the osb from the global list and also free up all the 1644 * initialized resources and fileobject. 1645 */ 1646 static void ocfs2_delete_osb(struct ocfs2_super *osb) 1647 { 1648 mlog_entry_void(); 1649 1650 /* This function assumes that the caller has the main osb resource */ 1651 1652 if (osb->slot_info) 1653 ocfs2_free_slot_info(osb->slot_info); 1654 1655 kfree(osb->osb_orphan_wipes); 1656 /* FIXME 1657 * This belongs in journal shutdown, but because we have to 1658 * allocate osb->journal at the start of ocfs2_initalize_osb(), 1659 * we free it here. 1660 */ 1661 kfree(osb->journal); 1662 if (osb->local_alloc_copy) 1663 kfree(osb->local_alloc_copy); 1664 kfree(osb->uuid_str); 1665 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 1666 memset(osb, 0, sizeof(struct ocfs2_super)); 1667 1668 mlog_exit_void(); 1669 } 1670 1671 /* Put OCFS2 into a readonly state, or (if the user specifies it), 1672 * panic(). We do not support continue-on-error operation. */ 1673 static void ocfs2_handle_error(struct super_block *sb) 1674 { 1675 struct ocfs2_super *osb = OCFS2_SB(sb); 1676 1677 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 1678 panic("OCFS2: (device %s): panic forced after error\n", 1679 sb->s_id); 1680 1681 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 1682 1683 if (sb->s_flags & MS_RDONLY && 1684 (ocfs2_is_soft_readonly(osb) || 1685 ocfs2_is_hard_readonly(osb))) 1686 return; 1687 1688 printk(KERN_CRIT "File system is now read-only due to the potential " 1689 "of on-disk corruption. Please run fsck.ocfs2 once the file " 1690 "system is unmounted.\n"); 1691 sb->s_flags |= MS_RDONLY; 1692 ocfs2_set_ro_flag(osb, 0); 1693 } 1694 1695 static char error_buf[1024]; 1696 1697 void __ocfs2_error(struct super_block *sb, 1698 const char *function, 1699 const char *fmt, ...) 1700 { 1701 va_list args; 1702 1703 va_start(args, fmt); 1704 vsprintf(error_buf, fmt, args); 1705 va_end(args); 1706 1707 /* Not using mlog here because we want to show the actual 1708 * function the error came from. */ 1709 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 1710 sb->s_id, function, error_buf); 1711 1712 ocfs2_handle_error(sb); 1713 } 1714 1715 /* Handle critical errors. This is intentionally more drastic than 1716 * ocfs2_handle_error, so we only use for things like journal errors, 1717 * etc. */ 1718 void __ocfs2_abort(struct super_block* sb, 1719 const char *function, 1720 const char *fmt, ...) 1721 { 1722 va_list args; 1723 1724 va_start(args, fmt); 1725 vsprintf(error_buf, fmt, args); 1726 va_end(args); 1727 1728 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 1729 sb->s_id, function, error_buf); 1730 1731 /* We don't have the cluster support yet to go straight to 1732 * hard readonly in here. Until then, we want to keep 1733 * ocfs2_abort() so that we can at least mark critical 1734 * errors. 1735 * 1736 * TODO: This should abort the journal and alert other nodes 1737 * that our slot needs recovery. */ 1738 1739 /* Force a panic(). This stinks, but it's better than letting 1740 * things continue without having a proper hard readonly 1741 * here. */ 1742 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1743 ocfs2_handle_error(sb); 1744 } 1745 1746 module_init(ocfs2_init); 1747 module_exit(ocfs2_exit); 1748