1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/utsname.h> 32 #include <linux/init.h> 33 #include <linux/random.h> 34 #include <linux/statfs.h> 35 #include <linux/moduleparam.h> 36 #include <linux/blkdev.h> 37 #include <linux/socket.h> 38 #include <linux/inet.h> 39 #include <linux/parser.h> 40 #include <linux/crc32.h> 41 #include <linux/debugfs.h> 42 #include <linux/mount.h> 43 44 #include <cluster/nodemanager.h> 45 46 #define MLOG_MASK_PREFIX ML_SUPER 47 #include <cluster/masklog.h> 48 49 #include "ocfs2.h" 50 51 /* this should be the only file to include a version 1 header */ 52 #include "ocfs1_fs_compat.h" 53 54 #include "alloc.h" 55 #include "dlmglue.h" 56 #include "export.h" 57 #include "extent_map.h" 58 #include "heartbeat.h" 59 #include "inode.h" 60 #include "journal.h" 61 #include "localalloc.h" 62 #include "namei.h" 63 #include "slot_map.h" 64 #include "super.h" 65 #include "sysfile.h" 66 #include "uptodate.h" 67 #include "ver.h" 68 69 #include "buffer_head_io.h" 70 71 static struct kmem_cache *ocfs2_inode_cachep = NULL; 72 73 /* OCFS2 needs to schedule several differnt types of work which 74 * require cluster locking, disk I/O, recovery waits, etc. Since these 75 * types of work tend to be heavy we avoid using the kernel events 76 * workqueue and schedule on our own. */ 77 struct workqueue_struct *ocfs2_wq = NULL; 78 79 static struct dentry *ocfs2_debugfs_root = NULL; 80 81 MODULE_AUTHOR("Oracle"); 82 MODULE_LICENSE("GPL"); 83 84 struct mount_options 85 { 86 unsigned long commit_interval; 87 unsigned long mount_opt; 88 unsigned int atime_quantum; 89 signed short slot; 90 }; 91 92 static int ocfs2_parse_options(struct super_block *sb, char *options, 93 struct mount_options *mopt, 94 int is_remount); 95 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 96 static void ocfs2_put_super(struct super_block *sb); 97 static int ocfs2_mount_volume(struct super_block *sb); 98 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 99 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 100 static int ocfs2_initialize_mem_caches(void); 101 static void ocfs2_free_mem_caches(void); 102 static void ocfs2_delete_osb(struct ocfs2_super *osb); 103 104 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 105 106 static int ocfs2_sync_fs(struct super_block *sb, int wait); 107 108 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 109 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 110 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 111 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb); 112 static int ocfs2_check_volume(struct ocfs2_super *osb); 113 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 114 struct buffer_head *bh, 115 u32 sectsize); 116 static int ocfs2_initialize_super(struct super_block *sb, 117 struct buffer_head *bh, 118 int sector_size); 119 static int ocfs2_get_sector(struct super_block *sb, 120 struct buffer_head **bh, 121 int block, 122 int sect_size); 123 static void ocfs2_write_super(struct super_block *sb); 124 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 125 static void ocfs2_destroy_inode(struct inode *inode); 126 127 static const struct super_operations ocfs2_sops = { 128 .statfs = ocfs2_statfs, 129 .alloc_inode = ocfs2_alloc_inode, 130 .destroy_inode = ocfs2_destroy_inode, 131 .drop_inode = ocfs2_drop_inode, 132 .clear_inode = ocfs2_clear_inode, 133 .delete_inode = ocfs2_delete_inode, 134 .sync_fs = ocfs2_sync_fs, 135 .write_super = ocfs2_write_super, 136 .put_super = ocfs2_put_super, 137 .remount_fs = ocfs2_remount, 138 .show_options = ocfs2_show_options, 139 }; 140 141 enum { 142 Opt_barrier, 143 Opt_err_panic, 144 Opt_err_ro, 145 Opt_intr, 146 Opt_nointr, 147 Opt_hb_none, 148 Opt_hb_local, 149 Opt_data_ordered, 150 Opt_data_writeback, 151 Opt_atime_quantum, 152 Opt_slot, 153 Opt_commit, 154 Opt_err, 155 }; 156 157 static match_table_t tokens = { 158 {Opt_barrier, "barrier=%u"}, 159 {Opt_err_panic, "errors=panic"}, 160 {Opt_err_ro, "errors=remount-ro"}, 161 {Opt_intr, "intr"}, 162 {Opt_nointr, "nointr"}, 163 {Opt_hb_none, OCFS2_HB_NONE}, 164 {Opt_hb_local, OCFS2_HB_LOCAL}, 165 {Opt_data_ordered, "data=ordered"}, 166 {Opt_data_writeback, "data=writeback"}, 167 {Opt_atime_quantum, "atime_quantum=%u"}, 168 {Opt_slot, "preferred_slot=%u"}, 169 {Opt_commit, "commit=%u"}, 170 {Opt_err, NULL} 171 }; 172 173 /* 174 * write_super and sync_fs ripped right out of ext3. 175 */ 176 static void ocfs2_write_super(struct super_block *sb) 177 { 178 if (mutex_trylock(&sb->s_lock) != 0) 179 BUG(); 180 sb->s_dirt = 0; 181 } 182 183 static int ocfs2_sync_fs(struct super_block *sb, int wait) 184 { 185 int status; 186 tid_t target; 187 struct ocfs2_super *osb = OCFS2_SB(sb); 188 189 sb->s_dirt = 0; 190 191 if (ocfs2_is_hard_readonly(osb)) 192 return -EROFS; 193 194 if (wait) { 195 status = ocfs2_flush_truncate_log(osb); 196 if (status < 0) 197 mlog_errno(status); 198 } else { 199 ocfs2_schedule_truncate_log_flush(osb, 0); 200 } 201 202 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) { 203 if (wait) 204 log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 205 target); 206 } 207 return 0; 208 } 209 210 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 211 { 212 struct inode *new = NULL; 213 int status = 0; 214 int i; 215 216 mlog_entry_void(); 217 218 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE); 219 if (IS_ERR(new)) { 220 status = PTR_ERR(new); 221 mlog_errno(status); 222 goto bail; 223 } 224 osb->root_inode = new; 225 226 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE); 227 if (IS_ERR(new)) { 228 status = PTR_ERR(new); 229 mlog_errno(status); 230 goto bail; 231 } 232 osb->sys_root_inode = new; 233 234 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 235 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 236 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 237 if (!new) { 238 ocfs2_release_system_inodes(osb); 239 status = -EINVAL; 240 mlog_errno(status); 241 /* FIXME: Should ERROR_RO_FS */ 242 mlog(ML_ERROR, "Unable to load system inode %d, " 243 "possibly corrupt fs?", i); 244 goto bail; 245 } 246 // the array now has one ref, so drop this one 247 iput(new); 248 } 249 250 bail: 251 mlog_exit(status); 252 return status; 253 } 254 255 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 256 { 257 struct inode *new = NULL; 258 int status = 0; 259 int i; 260 261 mlog_entry_void(); 262 263 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 264 i < NUM_SYSTEM_INODES; 265 i++) { 266 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 267 if (!new) { 268 ocfs2_release_system_inodes(osb); 269 status = -EINVAL; 270 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 271 status, i, osb->slot_num); 272 goto bail; 273 } 274 /* the array now has one ref, so drop this one */ 275 iput(new); 276 } 277 278 bail: 279 mlog_exit(status); 280 return status; 281 } 282 283 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 284 { 285 int i; 286 struct inode *inode; 287 288 mlog_entry_void(); 289 290 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 291 inode = osb->system_inodes[i]; 292 if (inode) { 293 iput(inode); 294 osb->system_inodes[i] = NULL; 295 } 296 } 297 298 inode = osb->sys_root_inode; 299 if (inode) { 300 iput(inode); 301 osb->sys_root_inode = NULL; 302 } 303 304 inode = osb->root_inode; 305 if (inode) { 306 iput(inode); 307 osb->root_inode = NULL; 308 } 309 310 mlog_exit(0); 311 } 312 313 /* We're allocating fs objects, use GFP_NOFS */ 314 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 315 { 316 struct ocfs2_inode_info *oi; 317 318 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 319 if (!oi) 320 return NULL; 321 322 return &oi->vfs_inode; 323 } 324 325 static void ocfs2_destroy_inode(struct inode *inode) 326 { 327 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 328 } 329 330 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 331 unsigned int cbits) 332 { 333 unsigned int bytes = 1 << cbits; 334 unsigned int trim = bytes; 335 unsigned int bitshift = 32; 336 337 /* 338 * i_size and all block offsets in ocfs2 are always 64 bits 339 * wide. i_clusters is 32 bits, in cluster-sized units. So on 340 * 64 bit platforms, cluster size will be the limiting factor. 341 */ 342 343 #if BITS_PER_LONG == 32 344 # if defined(CONFIG_LBD) 345 BUILD_BUG_ON(sizeof(sector_t) != 8); 346 /* 347 * We might be limited by page cache size. 348 */ 349 if (bytes > PAGE_CACHE_SIZE) { 350 bytes = PAGE_CACHE_SIZE; 351 trim = 1; 352 /* 353 * Shift by 31 here so that we don't get larger than 354 * MAX_LFS_FILESIZE 355 */ 356 bitshift = 31; 357 } 358 # else 359 /* 360 * We are limited by the size of sector_t. Use block size, as 361 * that's what we expose to the VFS. 362 */ 363 bytes = 1 << bbits; 364 trim = 1; 365 bitshift = 31; 366 # endif 367 #endif 368 369 /* 370 * Trim by a whole cluster when we can actually approach the 371 * on-disk limits. Otherwise we can overflow i_clusters when 372 * an extent start is at the max offset. 373 */ 374 return (((unsigned long long)bytes) << bitshift) - trim; 375 } 376 377 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 378 { 379 int incompat_features; 380 int ret = 0; 381 struct mount_options parsed_options; 382 struct ocfs2_super *osb = OCFS2_SB(sb); 383 384 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 385 ret = -EINVAL; 386 goto out; 387 } 388 389 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 390 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 391 ret = -EINVAL; 392 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 393 goto out; 394 } 395 396 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 397 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 398 ret = -EINVAL; 399 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 400 goto out; 401 } 402 403 /* We're going to/from readonly mode. */ 404 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 405 /* Lock here so the check of HARD_RO and the potential 406 * setting of SOFT_RO is atomic. */ 407 spin_lock(&osb->osb_lock); 408 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 409 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 410 ret = -EROFS; 411 goto unlock_osb; 412 } 413 414 if (*flags & MS_RDONLY) { 415 mlog(0, "Going to ro mode.\n"); 416 sb->s_flags |= MS_RDONLY; 417 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 418 } else { 419 mlog(0, "Making ro filesystem writeable.\n"); 420 421 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 422 mlog(ML_ERROR, "Cannot remount RDWR " 423 "filesystem due to previous errors.\n"); 424 ret = -EROFS; 425 goto unlock_osb; 426 } 427 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 428 if (incompat_features) { 429 mlog(ML_ERROR, "Cannot remount RDWR because " 430 "of unsupported optional features " 431 "(%x).\n", incompat_features); 432 ret = -EINVAL; 433 goto unlock_osb; 434 } 435 sb->s_flags &= ~MS_RDONLY; 436 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 437 } 438 unlock_osb: 439 spin_unlock(&osb->osb_lock); 440 } 441 442 if (!ret) { 443 /* Only save off the new mount options in case of a successful 444 * remount. */ 445 osb->s_mount_opt = parsed_options.mount_opt; 446 osb->s_atime_quantum = parsed_options.atime_quantum; 447 osb->preferred_slot = parsed_options.slot; 448 if (parsed_options.commit_interval) 449 osb->osb_commit_interval = parsed_options.commit_interval; 450 451 if (!ocfs2_is_hard_readonly(osb)) 452 ocfs2_set_journal_params(osb); 453 } 454 out: 455 return ret; 456 } 457 458 static int ocfs2_sb_probe(struct super_block *sb, 459 struct buffer_head **bh, 460 int *sector_size) 461 { 462 int status, tmpstat; 463 struct ocfs1_vol_disk_hdr *hdr; 464 struct ocfs2_dinode *di; 465 int blksize; 466 467 *bh = NULL; 468 469 /* may be > 512 */ 470 *sector_size = bdev_hardsect_size(sb->s_bdev); 471 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 472 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 473 *sector_size, OCFS2_MAX_BLOCKSIZE); 474 status = -EINVAL; 475 goto bail; 476 } 477 478 /* Can this really happen? */ 479 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 480 *sector_size = OCFS2_MIN_BLOCKSIZE; 481 482 /* check block zero for old format */ 483 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 484 if (status < 0) { 485 mlog_errno(status); 486 goto bail; 487 } 488 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 489 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 490 mlog(ML_ERROR, "incompatible version: %u.%u\n", 491 hdr->major_version, hdr->minor_version); 492 status = -EINVAL; 493 } 494 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 495 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 496 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 497 hdr->signature); 498 status = -EINVAL; 499 } 500 brelse(*bh); 501 *bh = NULL; 502 if (status < 0) { 503 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 504 "upgraded before mounting with ocfs v2\n"); 505 goto bail; 506 } 507 508 /* 509 * Now check at magic offset for 512, 1024, 2048, 4096 510 * blocksizes. 4096 is the maximum blocksize because it is 511 * the minimum clustersize. 512 */ 513 status = -EINVAL; 514 for (blksize = *sector_size; 515 blksize <= OCFS2_MAX_BLOCKSIZE; 516 blksize <<= 1) { 517 tmpstat = ocfs2_get_sector(sb, bh, 518 OCFS2_SUPER_BLOCK_BLKNO, 519 blksize); 520 if (tmpstat < 0) { 521 status = tmpstat; 522 mlog_errno(status); 523 goto bail; 524 } 525 di = (struct ocfs2_dinode *) (*bh)->b_data; 526 status = ocfs2_verify_volume(di, *bh, blksize); 527 if (status >= 0) 528 goto bail; 529 brelse(*bh); 530 *bh = NULL; 531 if (status != -EAGAIN) 532 break; 533 } 534 535 bail: 536 return status; 537 } 538 539 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 540 { 541 if (ocfs2_mount_local(osb)) { 542 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 543 mlog(ML_ERROR, "Cannot heartbeat on a locally " 544 "mounted device.\n"); 545 return -EINVAL; 546 } 547 } 548 549 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 550 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb)) { 551 mlog(ML_ERROR, "Heartbeat has to be started to mount " 552 "a read-write clustered device.\n"); 553 return -EINVAL; 554 } 555 } 556 557 return 0; 558 } 559 560 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 561 { 562 struct dentry *root; 563 int status, sector_size; 564 struct mount_options parsed_options; 565 struct inode *inode = NULL; 566 struct ocfs2_super *osb = NULL; 567 struct buffer_head *bh = NULL; 568 char nodestr[8]; 569 570 mlog_entry("%p, %p, %i", sb, data, silent); 571 572 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 573 status = -EINVAL; 574 goto read_super_error; 575 } 576 577 /* for now we only have one cluster/node, make sure we see it 578 * in the heartbeat universe */ 579 if (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL) { 580 if (!o2hb_check_local_node_heartbeating()) { 581 status = -EINVAL; 582 goto read_super_error; 583 } 584 } 585 586 /* probe for superblock */ 587 status = ocfs2_sb_probe(sb, &bh, §or_size); 588 if (status < 0) { 589 mlog(ML_ERROR, "superblock probe failed!\n"); 590 goto read_super_error; 591 } 592 593 status = ocfs2_initialize_super(sb, bh, sector_size); 594 osb = OCFS2_SB(sb); 595 if (status < 0) { 596 mlog_errno(status); 597 goto read_super_error; 598 } 599 brelse(bh); 600 bh = NULL; 601 osb->s_mount_opt = parsed_options.mount_opt; 602 osb->s_atime_quantum = parsed_options.atime_quantum; 603 osb->preferred_slot = parsed_options.slot; 604 osb->osb_commit_interval = parsed_options.commit_interval; 605 606 sb->s_magic = OCFS2_SUPER_MAGIC; 607 608 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 609 * heartbeat=none */ 610 if (bdev_read_only(sb->s_bdev)) { 611 if (!(sb->s_flags & MS_RDONLY)) { 612 status = -EACCES; 613 mlog(ML_ERROR, "Readonly device detected but readonly " 614 "mount was not specified.\n"); 615 goto read_super_error; 616 } 617 618 /* You should not be able to start a local heartbeat 619 * on a readonly device. */ 620 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 621 status = -EROFS; 622 mlog(ML_ERROR, "Local heartbeat specified on readonly " 623 "device.\n"); 624 goto read_super_error; 625 } 626 627 status = ocfs2_check_journals_nolocks(osb); 628 if (status < 0) { 629 if (status == -EROFS) 630 mlog(ML_ERROR, "Recovery required on readonly " 631 "file system, but write access is " 632 "unavailable.\n"); 633 else 634 mlog_errno(status); 635 goto read_super_error; 636 } 637 638 ocfs2_set_ro_flag(osb, 1); 639 640 printk(KERN_NOTICE "Readonly device detected. No cluster " 641 "services will be utilized for this mount. Recovery " 642 "will be skipped.\n"); 643 } 644 645 if (!ocfs2_is_hard_readonly(osb)) { 646 if (sb->s_flags & MS_RDONLY) 647 ocfs2_set_ro_flag(osb, 0); 648 } 649 650 status = ocfs2_verify_heartbeat(osb); 651 if (status < 0) { 652 mlog_errno(status); 653 goto read_super_error; 654 } 655 656 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 657 ocfs2_debugfs_root); 658 if (!osb->osb_debug_root) { 659 status = -EINVAL; 660 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 661 goto read_super_error; 662 } 663 664 status = ocfs2_mount_volume(sb); 665 if (osb->root_inode) 666 inode = igrab(osb->root_inode); 667 668 if (status < 0) 669 goto read_super_error; 670 671 if (!inode) { 672 status = -EIO; 673 mlog_errno(status); 674 goto read_super_error; 675 } 676 677 root = d_alloc_root(inode); 678 if (!root) { 679 status = -ENOMEM; 680 mlog_errno(status); 681 goto read_super_error; 682 } 683 684 sb->s_root = root; 685 686 ocfs2_complete_mount_recovery(osb); 687 688 if (ocfs2_mount_local(osb)) 689 snprintf(nodestr, sizeof(nodestr), "local"); 690 else 691 snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num); 692 693 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 694 "with %s data mode.\n", 695 osb->dev_str, nodestr, osb->slot_num, 696 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 697 "ordered"); 698 699 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 700 wake_up(&osb->osb_mount_event); 701 702 mlog_exit(status); 703 return status; 704 705 read_super_error: 706 if (bh != NULL) 707 brelse(bh); 708 709 if (inode) 710 iput(inode); 711 712 if (osb) { 713 atomic_set(&osb->vol_state, VOLUME_DISABLED); 714 wake_up(&osb->osb_mount_event); 715 ocfs2_dismount_volume(sb, 1); 716 } 717 718 mlog_exit(status); 719 return status; 720 } 721 722 static int ocfs2_get_sb(struct file_system_type *fs_type, 723 int flags, 724 const char *dev_name, 725 void *data, 726 struct vfsmount *mnt) 727 { 728 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 729 mnt); 730 } 731 732 static struct file_system_type ocfs2_fs_type = { 733 .owner = THIS_MODULE, 734 .name = "ocfs2", 735 .get_sb = ocfs2_get_sb, /* is this called when we mount 736 * the fs? */ 737 .kill_sb = kill_block_super, /* set to the generic one 738 * right now, but do we 739 * need to change that? */ 740 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 741 .next = NULL 742 }; 743 744 static int ocfs2_parse_options(struct super_block *sb, 745 char *options, 746 struct mount_options *mopt, 747 int is_remount) 748 { 749 int status; 750 char *p; 751 752 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 753 options ? options : "(none)"); 754 755 mopt->commit_interval = 0; 756 mopt->mount_opt = 0; 757 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 758 mopt->slot = OCFS2_INVALID_SLOT; 759 760 if (!options) { 761 status = 1; 762 goto bail; 763 } 764 765 while ((p = strsep(&options, ",")) != NULL) { 766 int token, option; 767 substring_t args[MAX_OPT_ARGS]; 768 769 if (!*p) 770 continue; 771 772 token = match_token(p, tokens, args); 773 switch (token) { 774 case Opt_hb_local: 775 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 776 break; 777 case Opt_hb_none: 778 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 779 break; 780 case Opt_barrier: 781 if (match_int(&args[0], &option)) { 782 status = 0; 783 goto bail; 784 } 785 if (option) 786 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 787 else 788 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 789 break; 790 case Opt_intr: 791 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 792 break; 793 case Opt_nointr: 794 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 795 break; 796 case Opt_err_panic: 797 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 798 break; 799 case Opt_err_ro: 800 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 801 break; 802 case Opt_data_ordered: 803 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 804 break; 805 case Opt_data_writeback: 806 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 807 break; 808 case Opt_atime_quantum: 809 if (match_int(&args[0], &option)) { 810 status = 0; 811 goto bail; 812 } 813 if (option >= 0) 814 mopt->atime_quantum = option; 815 break; 816 case Opt_slot: 817 option = 0; 818 if (match_int(&args[0], &option)) { 819 status = 0; 820 goto bail; 821 } 822 if (option) 823 mopt->slot = (s16)option; 824 break; 825 case Opt_commit: 826 option = 0; 827 if (match_int(&args[0], &option)) { 828 status = 0; 829 goto bail; 830 } 831 if (option < 0) 832 return 0; 833 if (option == 0) 834 option = JBD_DEFAULT_MAX_COMMIT_AGE; 835 mopt->commit_interval = HZ * option; 836 break; 837 default: 838 mlog(ML_ERROR, 839 "Unrecognized mount option \"%s\" " 840 "or missing value\n", p); 841 status = 0; 842 goto bail; 843 } 844 } 845 846 status = 1; 847 848 bail: 849 mlog_exit(status); 850 return status; 851 } 852 853 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 854 { 855 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 856 unsigned long opts = osb->s_mount_opt; 857 858 if (opts & OCFS2_MOUNT_HB_LOCAL) 859 seq_printf(s, ",_netdev,heartbeat=local"); 860 else 861 seq_printf(s, ",heartbeat=none"); 862 863 if (opts & OCFS2_MOUNT_NOINTR) 864 seq_printf(s, ",nointr"); 865 866 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 867 seq_printf(s, ",data=writeback"); 868 else 869 seq_printf(s, ",data=ordered"); 870 871 if (opts & OCFS2_MOUNT_BARRIER) 872 seq_printf(s, ",barrier=1"); 873 874 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 875 seq_printf(s, ",errors=panic"); 876 else 877 seq_printf(s, ",errors=remount-ro"); 878 879 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 880 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 881 882 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 883 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 884 885 if (osb->osb_commit_interval) 886 seq_printf(s, ",commit=%u", 887 (unsigned) (osb->osb_commit_interval / HZ)); 888 889 return 0; 890 } 891 892 static int __init ocfs2_init(void) 893 { 894 int status; 895 896 mlog_entry_void(); 897 898 ocfs2_print_version(); 899 900 status = init_ocfs2_uptodate_cache(); 901 if (status < 0) { 902 mlog_errno(status); 903 goto leave; 904 } 905 906 status = ocfs2_initialize_mem_caches(); 907 if (status < 0) { 908 mlog_errno(status); 909 goto leave; 910 } 911 912 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 913 if (!ocfs2_wq) { 914 status = -ENOMEM; 915 goto leave; 916 } 917 918 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 919 if (!ocfs2_debugfs_root) { 920 status = -EFAULT; 921 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 922 } 923 924 leave: 925 if (status < 0) { 926 ocfs2_free_mem_caches(); 927 exit_ocfs2_uptodate_cache(); 928 } 929 930 mlog_exit(status); 931 932 if (status >= 0) { 933 return register_filesystem(&ocfs2_fs_type); 934 } else 935 return -1; 936 } 937 938 static void __exit ocfs2_exit(void) 939 { 940 mlog_entry_void(); 941 942 if (ocfs2_wq) { 943 flush_workqueue(ocfs2_wq); 944 destroy_workqueue(ocfs2_wq); 945 } 946 947 debugfs_remove(ocfs2_debugfs_root); 948 949 ocfs2_free_mem_caches(); 950 951 unregister_filesystem(&ocfs2_fs_type); 952 953 exit_ocfs2_uptodate_cache(); 954 955 mlog_exit_void(); 956 } 957 958 static void ocfs2_put_super(struct super_block *sb) 959 { 960 mlog_entry("(0x%p)\n", sb); 961 962 ocfs2_sync_blockdev(sb); 963 ocfs2_dismount_volume(sb, 0); 964 965 mlog_exit_void(); 966 } 967 968 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 969 { 970 struct ocfs2_super *osb; 971 u32 numbits, freebits; 972 int status; 973 struct ocfs2_dinode *bm_lock; 974 struct buffer_head *bh = NULL; 975 struct inode *inode = NULL; 976 977 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 978 979 osb = OCFS2_SB(dentry->d_sb); 980 981 inode = ocfs2_get_system_file_inode(osb, 982 GLOBAL_BITMAP_SYSTEM_INODE, 983 OCFS2_INVALID_SLOT); 984 if (!inode) { 985 mlog(ML_ERROR, "failed to get bitmap inode\n"); 986 status = -EIO; 987 goto bail; 988 } 989 990 status = ocfs2_inode_lock(inode, &bh, 0); 991 if (status < 0) { 992 mlog_errno(status); 993 goto bail; 994 } 995 996 bm_lock = (struct ocfs2_dinode *) bh->b_data; 997 998 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 999 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1000 1001 buf->f_type = OCFS2_SUPER_MAGIC; 1002 buf->f_bsize = dentry->d_sb->s_blocksize; 1003 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1004 buf->f_blocks = ((sector_t) numbits) * 1005 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1006 buf->f_bfree = ((sector_t) freebits) * 1007 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1008 buf->f_bavail = buf->f_bfree; 1009 buf->f_files = numbits; 1010 buf->f_ffree = freebits; 1011 1012 brelse(bh); 1013 1014 ocfs2_inode_unlock(inode, 0); 1015 status = 0; 1016 bail: 1017 if (inode) 1018 iput(inode); 1019 1020 mlog_exit(status); 1021 1022 return status; 1023 } 1024 1025 static void ocfs2_inode_init_once(struct kmem_cache *cachep, void *data) 1026 { 1027 struct ocfs2_inode_info *oi = data; 1028 1029 oi->ip_flags = 0; 1030 oi->ip_open_count = 0; 1031 spin_lock_init(&oi->ip_lock); 1032 ocfs2_extent_map_init(&oi->vfs_inode); 1033 INIT_LIST_HEAD(&oi->ip_io_markers); 1034 oi->ip_created_trans = 0; 1035 oi->ip_last_trans = 0; 1036 oi->ip_dir_start_lookup = 0; 1037 1038 init_rwsem(&oi->ip_alloc_sem); 1039 mutex_init(&oi->ip_io_mutex); 1040 1041 oi->ip_blkno = 0ULL; 1042 oi->ip_clusters = 0; 1043 1044 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1045 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1046 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1047 1048 ocfs2_metadata_cache_init(&oi->vfs_inode); 1049 1050 inode_init_once(&oi->vfs_inode); 1051 } 1052 1053 static int ocfs2_initialize_mem_caches(void) 1054 { 1055 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1056 sizeof(struct ocfs2_inode_info), 1057 0, 1058 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1059 SLAB_MEM_SPREAD), 1060 ocfs2_inode_init_once); 1061 if (!ocfs2_inode_cachep) 1062 return -ENOMEM; 1063 1064 return 0; 1065 } 1066 1067 static void ocfs2_free_mem_caches(void) 1068 { 1069 if (ocfs2_inode_cachep) 1070 kmem_cache_destroy(ocfs2_inode_cachep); 1071 1072 ocfs2_inode_cachep = NULL; 1073 } 1074 1075 static int ocfs2_get_sector(struct super_block *sb, 1076 struct buffer_head **bh, 1077 int block, 1078 int sect_size) 1079 { 1080 if (!sb_set_blocksize(sb, sect_size)) { 1081 mlog(ML_ERROR, "unable to set blocksize\n"); 1082 return -EIO; 1083 } 1084 1085 *bh = sb_getblk(sb, block); 1086 if (!*bh) { 1087 mlog_errno(-EIO); 1088 return -EIO; 1089 } 1090 lock_buffer(*bh); 1091 if (!buffer_dirty(*bh)) 1092 clear_buffer_uptodate(*bh); 1093 unlock_buffer(*bh); 1094 ll_rw_block(READ, 1, bh); 1095 wait_on_buffer(*bh); 1096 return 0; 1097 } 1098 1099 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */ 1100 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) 1101 { 1102 int status; 1103 1104 /* XXX hold a ref on the node while mounte? easy enough, if 1105 * desirable. */ 1106 if (ocfs2_mount_local(osb)) 1107 osb->node_num = 0; 1108 else 1109 osb->node_num = o2nm_this_node(); 1110 1111 if (osb->node_num == O2NM_MAX_NODES) { 1112 mlog(ML_ERROR, "could not find this host's node number\n"); 1113 status = -ENOENT; 1114 goto bail; 1115 } 1116 1117 mlog(0, "I am node %d\n", osb->node_num); 1118 1119 status = 0; 1120 bail: 1121 return status; 1122 } 1123 1124 static int ocfs2_mount_volume(struct super_block *sb) 1125 { 1126 int status = 0; 1127 int unlock_super = 0; 1128 struct ocfs2_super *osb = OCFS2_SB(sb); 1129 1130 mlog_entry_void(); 1131 1132 if (ocfs2_is_hard_readonly(osb)) 1133 goto leave; 1134 1135 status = ocfs2_fill_local_node_info(osb); 1136 if (status < 0) { 1137 mlog_errno(status); 1138 goto leave; 1139 } 1140 1141 status = ocfs2_dlm_init(osb); 1142 if (status < 0) { 1143 mlog_errno(status); 1144 goto leave; 1145 } 1146 1147 status = ocfs2_super_lock(osb, 1); 1148 if (status < 0) { 1149 mlog_errno(status); 1150 goto leave; 1151 } 1152 unlock_super = 1; 1153 1154 /* This will load up the node map and add ourselves to it. */ 1155 status = ocfs2_find_slot(osb); 1156 if (status < 0) { 1157 mlog_errno(status); 1158 goto leave; 1159 } 1160 1161 /* load all node-local system inodes */ 1162 status = ocfs2_init_local_system_inodes(osb); 1163 if (status < 0) { 1164 mlog_errno(status); 1165 goto leave; 1166 } 1167 1168 status = ocfs2_check_volume(osb); 1169 if (status < 0) { 1170 mlog_errno(status); 1171 goto leave; 1172 } 1173 1174 status = ocfs2_truncate_log_init(osb); 1175 if (status < 0) { 1176 mlog_errno(status); 1177 goto leave; 1178 } 1179 1180 if (ocfs2_mount_local(osb)) 1181 goto leave; 1182 1183 leave: 1184 if (unlock_super) 1185 ocfs2_super_unlock(osb, 1); 1186 1187 mlog_exit(status); 1188 return status; 1189 } 1190 1191 /* we can't grab the goofy sem lock from inside wait_event, so we use 1192 * memory barriers to make sure that we'll see the null task before 1193 * being woken up */ 1194 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) 1195 { 1196 mb(); 1197 return osb->recovery_thread_task != NULL; 1198 } 1199 1200 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1201 { 1202 int tmp; 1203 struct ocfs2_super *osb = NULL; 1204 char nodestr[8]; 1205 1206 mlog_entry("(0x%p)\n", sb); 1207 1208 BUG_ON(!sb); 1209 osb = OCFS2_SB(sb); 1210 BUG_ON(!osb); 1211 1212 ocfs2_shutdown_local_alloc(osb); 1213 1214 ocfs2_truncate_log_shutdown(osb); 1215 1216 /* disable any new recovery threads and wait for any currently 1217 * running ones to exit. Do this before setting the vol_state. */ 1218 mutex_lock(&osb->recovery_lock); 1219 osb->disable_recovery = 1; 1220 mutex_unlock(&osb->recovery_lock); 1221 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); 1222 1223 /* At this point, we know that no more recovery threads can be 1224 * launched, so wait for any recovery completion work to 1225 * complete. */ 1226 flush_workqueue(ocfs2_wq); 1227 1228 ocfs2_journal_shutdown(osb); 1229 1230 ocfs2_sync_blockdev(sb); 1231 1232 /* No dlm means we've failed during mount, so skip all the 1233 * steps which depended on that to complete. */ 1234 if (osb->dlm) { 1235 tmp = ocfs2_super_lock(osb, 1); 1236 if (tmp < 0) { 1237 mlog_errno(tmp); 1238 return; 1239 } 1240 } 1241 1242 if (osb->slot_num != OCFS2_INVALID_SLOT) 1243 ocfs2_put_slot(osb); 1244 1245 if (osb->dlm) 1246 ocfs2_super_unlock(osb, 1); 1247 1248 ocfs2_release_system_inodes(osb); 1249 1250 if (osb->dlm) 1251 ocfs2_dlm_shutdown(osb); 1252 1253 debugfs_remove(osb->osb_debug_root); 1254 1255 if (!mnt_err) 1256 ocfs2_stop_heartbeat(osb); 1257 1258 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1259 1260 if (ocfs2_mount_local(osb)) 1261 snprintf(nodestr, sizeof(nodestr), "local"); 1262 else 1263 snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num); 1264 1265 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1266 osb->dev_str, nodestr); 1267 1268 ocfs2_delete_osb(osb); 1269 kfree(osb); 1270 sb->s_dev = 0; 1271 sb->s_fs_info = NULL; 1272 } 1273 1274 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1275 unsigned uuid_bytes) 1276 { 1277 int i, ret; 1278 char *ptr; 1279 1280 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1281 1282 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1283 if (osb->uuid_str == NULL) 1284 return -ENOMEM; 1285 1286 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1287 /* print with null */ 1288 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1289 if (ret != 2) /* drop super cleans up */ 1290 return -EINVAL; 1291 /* then only advance past the last char */ 1292 ptr += 2; 1293 } 1294 1295 return 0; 1296 } 1297 1298 static int ocfs2_initialize_super(struct super_block *sb, 1299 struct buffer_head *bh, 1300 int sector_size) 1301 { 1302 int status; 1303 int i, cbits, bbits; 1304 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1305 struct inode *inode = NULL; 1306 struct ocfs2_journal *journal; 1307 __le32 uuid_net_key; 1308 struct ocfs2_super *osb; 1309 1310 mlog_entry_void(); 1311 1312 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 1313 if (!osb) { 1314 status = -ENOMEM; 1315 mlog_errno(status); 1316 goto bail; 1317 } 1318 1319 sb->s_fs_info = osb; 1320 sb->s_op = &ocfs2_sops; 1321 sb->s_export_op = &ocfs2_export_ops; 1322 sb->s_time_gran = 1; 1323 sb->s_flags |= MS_NOATIME; 1324 /* this is needed to support O_LARGEFILE */ 1325 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1326 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 1327 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 1328 1329 osb->sb = sb; 1330 /* Save off for ocfs2_rw_direct */ 1331 osb->s_sectsize_bits = blksize_bits(sector_size); 1332 BUG_ON(!osb->s_sectsize_bits); 1333 1334 init_waitqueue_head(&osb->recovery_event); 1335 spin_lock_init(&osb->dc_task_lock); 1336 init_waitqueue_head(&osb->dc_event); 1337 osb->dc_work_sequence = 0; 1338 osb->dc_wake_sequence = 0; 1339 INIT_LIST_HEAD(&osb->blocked_lock_list); 1340 osb->blocked_lock_count = 0; 1341 spin_lock_init(&osb->osb_lock); 1342 1343 atomic_set(&osb->alloc_stats.moves, 0); 1344 atomic_set(&osb->alloc_stats.local_data, 0); 1345 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1346 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1347 atomic_set(&osb->alloc_stats.bg_extends, 0); 1348 1349 ocfs2_init_node_maps(osb); 1350 1351 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1352 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1353 1354 mutex_init(&osb->recovery_lock); 1355 1356 osb->disable_recovery = 0; 1357 osb->recovery_thread_task = NULL; 1358 1359 init_waitqueue_head(&osb->checkpoint_event); 1360 atomic_set(&osb->needs_checkpoint, 0); 1361 1362 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1363 1364 osb->node_num = O2NM_INVALID_NODE_NUM; 1365 osb->slot_num = OCFS2_INVALID_SLOT; 1366 1367 osb->local_alloc_state = OCFS2_LA_UNUSED; 1368 osb->local_alloc_bh = NULL; 1369 1370 ocfs2_setup_hb_callbacks(osb); 1371 1372 init_waitqueue_head(&osb->osb_mount_event); 1373 1374 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1375 if (!osb->vol_label) { 1376 mlog(ML_ERROR, "unable to alloc vol label\n"); 1377 status = -ENOMEM; 1378 goto bail; 1379 } 1380 1381 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1382 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1383 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1384 osb->max_slots); 1385 status = -EINVAL; 1386 goto bail; 1387 } 1388 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 1389 1390 init_waitqueue_head(&osb->osb_wipe_event); 1391 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 1392 sizeof(*osb->osb_orphan_wipes), 1393 GFP_KERNEL); 1394 if (!osb->osb_orphan_wipes) { 1395 status = -ENOMEM; 1396 mlog_errno(status); 1397 goto bail; 1398 } 1399 1400 osb->s_feature_compat = 1401 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 1402 osb->s_feature_ro_compat = 1403 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 1404 osb->s_feature_incompat = 1405 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 1406 1407 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 1408 mlog(ML_ERROR, "couldn't mount because of unsupported " 1409 "optional features (%x).\n", i); 1410 status = -EINVAL; 1411 goto bail; 1412 } 1413 if (!(osb->sb->s_flags & MS_RDONLY) && 1414 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 1415 mlog(ML_ERROR, "couldn't mount RDWR because of " 1416 "unsupported optional features (%x).\n", i); 1417 status = -EINVAL; 1418 goto bail; 1419 } 1420 1421 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 1422 1423 /* FIXME 1424 * This should be done in ocfs2_journal_init(), but unknown 1425 * ordering issues will cause the filesystem to crash. 1426 * If anyone wants to figure out what part of the code 1427 * refers to osb->journal before ocfs2_journal_init() is run, 1428 * be my guest. 1429 */ 1430 /* initialize our journal structure */ 1431 1432 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 1433 if (!journal) { 1434 mlog(ML_ERROR, "unable to alloc journal\n"); 1435 status = -ENOMEM; 1436 goto bail; 1437 } 1438 osb->journal = journal; 1439 journal->j_osb = osb; 1440 1441 atomic_set(&journal->j_num_trans, 0); 1442 init_rwsem(&journal->j_trans_barrier); 1443 init_waitqueue_head(&journal->j_checkpointed); 1444 spin_lock_init(&journal->j_lock); 1445 journal->j_trans_id = (unsigned long) 1; 1446 INIT_LIST_HEAD(&journal->j_la_cleanups); 1447 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 1448 journal->j_state = OCFS2_JOURNAL_FREE; 1449 1450 /* get some pseudo constants for clustersize bits */ 1451 osb->s_clustersize_bits = 1452 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1453 osb->s_clustersize = 1 << osb->s_clustersize_bits; 1454 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 1455 1456 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 1457 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 1458 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 1459 osb->s_clustersize); 1460 status = -EINVAL; 1461 goto bail; 1462 } 1463 1464 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 1465 > (u32)~0UL) { 1466 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 1467 "what jbd can address in 32 bits.\n"); 1468 status = -EINVAL; 1469 goto bail; 1470 } 1471 1472 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 1473 sizeof(di->id2.i_super.s_uuid))) { 1474 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 1475 status = -ENOMEM; 1476 goto bail; 1477 } 1478 1479 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 1480 1481 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 1482 osb->vol_label[63] = '\0'; 1483 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 1484 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 1485 osb->first_cluster_group_blkno = 1486 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 1487 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 1488 mlog(0, "vol_label: %s\n", osb->vol_label); 1489 mlog(0, "uuid: %s\n", osb->uuid_str); 1490 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 1491 (unsigned long long)osb->root_blkno, 1492 (unsigned long long)osb->system_dir_blkno); 1493 1494 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 1495 if (!osb->osb_dlm_debug) { 1496 status = -ENOMEM; 1497 mlog_errno(status); 1498 goto bail; 1499 } 1500 1501 atomic_set(&osb->vol_state, VOLUME_INIT); 1502 1503 /* load root, system_dir, and all global system inodes */ 1504 status = ocfs2_init_global_system_inodes(osb); 1505 if (status < 0) { 1506 mlog_errno(status); 1507 goto bail; 1508 } 1509 1510 /* 1511 * global bitmap 1512 */ 1513 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 1514 OCFS2_INVALID_SLOT); 1515 if (!inode) { 1516 status = -EINVAL; 1517 mlog_errno(status); 1518 goto bail; 1519 } 1520 1521 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 1522 iput(inode); 1523 1524 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8; 1525 1526 status = ocfs2_init_slot_info(osb); 1527 if (status < 0) { 1528 mlog_errno(status); 1529 goto bail; 1530 } 1531 1532 bail: 1533 mlog_exit(status); 1534 return status; 1535 } 1536 1537 /* 1538 * will return: -EAGAIN if it is ok to keep searching for superblocks 1539 * -EINVAL if there is a bad superblock 1540 * 0 on success 1541 */ 1542 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 1543 struct buffer_head *bh, 1544 u32 blksz) 1545 { 1546 int status = -EAGAIN; 1547 1548 mlog_entry_void(); 1549 1550 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 1551 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 1552 status = -EINVAL; 1553 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 1554 mlog(ML_ERROR, "found superblock with incorrect block " 1555 "size: found %u, should be %u\n", 1556 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 1557 blksz); 1558 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 1559 OCFS2_MAJOR_REV_LEVEL || 1560 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 1561 OCFS2_MINOR_REV_LEVEL) { 1562 mlog(ML_ERROR, "found superblock with bad version: " 1563 "found %u.%u, should be %u.%u\n", 1564 le16_to_cpu(di->id2.i_super.s_major_rev_level), 1565 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 1566 OCFS2_MAJOR_REV_LEVEL, 1567 OCFS2_MINOR_REV_LEVEL); 1568 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 1569 mlog(ML_ERROR, "bad block number on superblock: " 1570 "found %llu, should be %llu\n", 1571 (unsigned long long)le64_to_cpu(di->i_blkno), 1572 (unsigned long long)bh->b_blocknr); 1573 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 1574 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 1575 mlog(ML_ERROR, "bad cluster size found: %u\n", 1576 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 1577 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 1578 mlog(ML_ERROR, "bad root_blkno: 0\n"); 1579 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 1580 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 1581 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 1582 mlog(ML_ERROR, 1583 "Superblock slots found greater than file system " 1584 "maximum: found %u, max %u\n", 1585 le16_to_cpu(di->id2.i_super.s_max_slots), 1586 OCFS2_MAX_SLOTS); 1587 } else { 1588 /* found it! */ 1589 status = 0; 1590 } 1591 } 1592 1593 mlog_exit(status); 1594 return status; 1595 } 1596 1597 static int ocfs2_check_volume(struct ocfs2_super *osb) 1598 { 1599 int status; 1600 int dirty; 1601 int local; 1602 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 1603 * recover 1604 * ourselves. */ 1605 1606 mlog_entry_void(); 1607 1608 /* Init our journal object. */ 1609 status = ocfs2_journal_init(osb->journal, &dirty); 1610 if (status < 0) { 1611 mlog(ML_ERROR, "Could not initialize journal!\n"); 1612 goto finally; 1613 } 1614 1615 /* If the journal was unmounted cleanly then we don't want to 1616 * recover anything. Otherwise, journal_load will do that 1617 * dirty work for us :) */ 1618 if (!dirty) { 1619 status = ocfs2_journal_wipe(osb->journal, 0); 1620 if (status < 0) { 1621 mlog_errno(status); 1622 goto finally; 1623 } 1624 } else { 1625 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 1626 "recovering volume.\n"); 1627 } 1628 1629 local = ocfs2_mount_local(osb); 1630 1631 /* will play back anything left in the journal. */ 1632 ocfs2_journal_load(osb->journal, local); 1633 1634 if (dirty) { 1635 /* recover my local alloc if we didn't unmount cleanly. */ 1636 status = ocfs2_begin_local_alloc_recovery(osb, 1637 osb->slot_num, 1638 &local_alloc); 1639 if (status < 0) { 1640 mlog_errno(status); 1641 goto finally; 1642 } 1643 /* we complete the recovery process after we've marked 1644 * ourselves as mounted. */ 1645 } 1646 1647 mlog(0, "Journal loaded.\n"); 1648 1649 status = ocfs2_load_local_alloc(osb); 1650 if (status < 0) { 1651 mlog_errno(status); 1652 goto finally; 1653 } 1654 1655 if (dirty) { 1656 /* Recovery will be completed after we've mounted the 1657 * rest of the volume. */ 1658 osb->dirty = 1; 1659 osb->local_alloc_copy = local_alloc; 1660 local_alloc = NULL; 1661 } 1662 1663 /* go through each journal, trylock it and if you get the 1664 * lock, and it's marked as dirty, set the bit in the recover 1665 * map and launch a recovery thread for it. */ 1666 status = ocfs2_mark_dead_nodes(osb); 1667 if (status < 0) 1668 mlog_errno(status); 1669 1670 finally: 1671 if (local_alloc) 1672 kfree(local_alloc); 1673 1674 mlog_exit(status); 1675 return status; 1676 } 1677 1678 /* 1679 * The routine gets called from dismount or close whenever a dismount on 1680 * volume is requested and the osb open count becomes 1. 1681 * It will remove the osb from the global list and also free up all the 1682 * initialized resources and fileobject. 1683 */ 1684 static void ocfs2_delete_osb(struct ocfs2_super *osb) 1685 { 1686 mlog_entry_void(); 1687 1688 /* This function assumes that the caller has the main osb resource */ 1689 1690 if (osb->slot_info) 1691 ocfs2_free_slot_info(osb->slot_info); 1692 1693 kfree(osb->osb_orphan_wipes); 1694 /* FIXME 1695 * This belongs in journal shutdown, but because we have to 1696 * allocate osb->journal at the start of ocfs2_initalize_osb(), 1697 * we free it here. 1698 */ 1699 kfree(osb->journal); 1700 if (osb->local_alloc_copy) 1701 kfree(osb->local_alloc_copy); 1702 kfree(osb->uuid_str); 1703 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 1704 memset(osb, 0, sizeof(struct ocfs2_super)); 1705 1706 mlog_exit_void(); 1707 } 1708 1709 /* Put OCFS2 into a readonly state, or (if the user specifies it), 1710 * panic(). We do not support continue-on-error operation. */ 1711 static void ocfs2_handle_error(struct super_block *sb) 1712 { 1713 struct ocfs2_super *osb = OCFS2_SB(sb); 1714 1715 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 1716 panic("OCFS2: (device %s): panic forced after error\n", 1717 sb->s_id); 1718 1719 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 1720 1721 if (sb->s_flags & MS_RDONLY && 1722 (ocfs2_is_soft_readonly(osb) || 1723 ocfs2_is_hard_readonly(osb))) 1724 return; 1725 1726 printk(KERN_CRIT "File system is now read-only due to the potential " 1727 "of on-disk corruption. Please run fsck.ocfs2 once the file " 1728 "system is unmounted.\n"); 1729 sb->s_flags |= MS_RDONLY; 1730 ocfs2_set_ro_flag(osb, 0); 1731 } 1732 1733 static char error_buf[1024]; 1734 1735 void __ocfs2_error(struct super_block *sb, 1736 const char *function, 1737 const char *fmt, ...) 1738 { 1739 va_list args; 1740 1741 va_start(args, fmt); 1742 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1743 va_end(args); 1744 1745 /* Not using mlog here because we want to show the actual 1746 * function the error came from. */ 1747 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 1748 sb->s_id, function, error_buf); 1749 1750 ocfs2_handle_error(sb); 1751 } 1752 1753 /* Handle critical errors. This is intentionally more drastic than 1754 * ocfs2_handle_error, so we only use for things like journal errors, 1755 * etc. */ 1756 void __ocfs2_abort(struct super_block* sb, 1757 const char *function, 1758 const char *fmt, ...) 1759 { 1760 va_list args; 1761 1762 va_start(args, fmt); 1763 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1764 va_end(args); 1765 1766 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 1767 sb->s_id, function, error_buf); 1768 1769 /* We don't have the cluster support yet to go straight to 1770 * hard readonly in here. Until then, we want to keep 1771 * ocfs2_abort() so that we can at least mark critical 1772 * errors. 1773 * 1774 * TODO: This should abort the journal and alert other nodes 1775 * that our slot needs recovery. */ 1776 1777 /* Force a panic(). This stinks, but it's better than letting 1778 * things continue without having a proper hard readonly 1779 * here. */ 1780 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1781 ocfs2_handle_error(sb); 1782 } 1783 1784 module_init(ocfs2_init); 1785 module_exit(ocfs2_exit); 1786