1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/utsname.h> 32 #include <linux/init.h> 33 #include <linux/random.h> 34 #include <linux/statfs.h> 35 #include <linux/moduleparam.h> 36 #include <linux/blkdev.h> 37 #include <linux/socket.h> 38 #include <linux/inet.h> 39 #include <linux/parser.h> 40 #include <linux/crc32.h> 41 #include <linux/debugfs.h> 42 #include <linux/mount.h> 43 #include <linux/seq_file.h> 44 45 #define MLOG_MASK_PREFIX ML_SUPER 46 #include <cluster/masklog.h> 47 48 #include "ocfs2.h" 49 50 /* this should be the only file to include a version 1 header */ 51 #include "ocfs1_fs_compat.h" 52 53 #include "alloc.h" 54 #include "dlmglue.h" 55 #include "export.h" 56 #include "extent_map.h" 57 #include "heartbeat.h" 58 #include "inode.h" 59 #include "journal.h" 60 #include "localalloc.h" 61 #include "namei.h" 62 #include "slot_map.h" 63 #include "super.h" 64 #include "sysfile.h" 65 #include "uptodate.h" 66 #include "ver.h" 67 #include "xattr.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 unsigned int localalloc_opt; 91 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 92 }; 93 94 static int ocfs2_parse_options(struct super_block *sb, char *options, 95 struct mount_options *mopt, 96 int is_remount); 97 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 98 static void ocfs2_put_super(struct super_block *sb); 99 static int ocfs2_mount_volume(struct super_block *sb); 100 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 101 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 102 static int ocfs2_initialize_mem_caches(void); 103 static void ocfs2_free_mem_caches(void); 104 static void ocfs2_delete_osb(struct ocfs2_super *osb); 105 106 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 107 108 static int ocfs2_sync_fs(struct super_block *sb, int wait); 109 110 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 111 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 112 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 113 static int ocfs2_check_volume(struct ocfs2_super *osb); 114 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 115 struct buffer_head *bh, 116 u32 sectsize); 117 static int ocfs2_initialize_super(struct super_block *sb, 118 struct buffer_head *bh, 119 int sector_size); 120 static int ocfs2_get_sector(struct super_block *sb, 121 struct buffer_head **bh, 122 int block, 123 int sect_size); 124 static void ocfs2_write_super(struct super_block *sb); 125 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 126 static void ocfs2_destroy_inode(struct inode *inode); 127 128 static const 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 .show_options = ocfs2_show_options, 140 }; 141 142 enum { 143 Opt_barrier, 144 Opt_err_panic, 145 Opt_err_ro, 146 Opt_intr, 147 Opt_nointr, 148 Opt_hb_none, 149 Opt_hb_local, 150 Opt_data_ordered, 151 Opt_data_writeback, 152 Opt_atime_quantum, 153 Opt_slot, 154 Opt_commit, 155 Opt_localalloc, 156 Opt_localflocks, 157 Opt_stack, 158 Opt_user_xattr, 159 Opt_nouser_xattr, 160 Opt_inode64, 161 Opt_err, 162 }; 163 164 static const match_table_t tokens = { 165 {Opt_barrier, "barrier=%u"}, 166 {Opt_err_panic, "errors=panic"}, 167 {Opt_err_ro, "errors=remount-ro"}, 168 {Opt_intr, "intr"}, 169 {Opt_nointr, "nointr"}, 170 {Opt_hb_none, OCFS2_HB_NONE}, 171 {Opt_hb_local, OCFS2_HB_LOCAL}, 172 {Opt_data_ordered, "data=ordered"}, 173 {Opt_data_writeback, "data=writeback"}, 174 {Opt_atime_quantum, "atime_quantum=%u"}, 175 {Opt_slot, "preferred_slot=%u"}, 176 {Opt_commit, "commit=%u"}, 177 {Opt_localalloc, "localalloc=%d"}, 178 {Opt_localflocks, "localflocks"}, 179 {Opt_stack, "cluster_stack=%s"}, 180 {Opt_user_xattr, "user_xattr"}, 181 {Opt_nouser_xattr, "nouser_xattr"}, 182 {Opt_inode64, "inode64"}, 183 {Opt_err, NULL} 184 }; 185 186 /* 187 * write_super and sync_fs ripped right out of ext3. 188 */ 189 static void ocfs2_write_super(struct super_block *sb) 190 { 191 if (mutex_trylock(&sb->s_lock) != 0) 192 BUG(); 193 sb->s_dirt = 0; 194 } 195 196 static int ocfs2_sync_fs(struct super_block *sb, int wait) 197 { 198 int status; 199 tid_t target; 200 struct ocfs2_super *osb = OCFS2_SB(sb); 201 202 sb->s_dirt = 0; 203 204 if (ocfs2_is_hard_readonly(osb)) 205 return -EROFS; 206 207 if (wait) { 208 status = ocfs2_flush_truncate_log(osb); 209 if (status < 0) 210 mlog_errno(status); 211 } else { 212 ocfs2_schedule_truncate_log_flush(osb, 0); 213 } 214 215 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 216 &target)) { 217 if (wait) 218 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 219 target); 220 } 221 return 0; 222 } 223 224 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 225 { 226 struct inode *new = NULL; 227 int status = 0; 228 int i; 229 230 mlog_entry_void(); 231 232 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 233 if (IS_ERR(new)) { 234 status = PTR_ERR(new); 235 mlog_errno(status); 236 goto bail; 237 } 238 osb->root_inode = new; 239 240 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 241 if (IS_ERR(new)) { 242 status = PTR_ERR(new); 243 mlog_errno(status); 244 goto bail; 245 } 246 osb->sys_root_inode = new; 247 248 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 249 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 250 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 251 if (!new) { 252 ocfs2_release_system_inodes(osb); 253 status = -EINVAL; 254 mlog_errno(status); 255 /* FIXME: Should ERROR_RO_FS */ 256 mlog(ML_ERROR, "Unable to load system inode %d, " 257 "possibly corrupt fs?", i); 258 goto bail; 259 } 260 // the array now has one ref, so drop this one 261 iput(new); 262 } 263 264 bail: 265 mlog_exit(status); 266 return status; 267 } 268 269 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 270 { 271 struct inode *new = NULL; 272 int status = 0; 273 int i; 274 275 mlog_entry_void(); 276 277 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 278 i < NUM_SYSTEM_INODES; 279 i++) { 280 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 281 if (!new) { 282 ocfs2_release_system_inodes(osb); 283 status = -EINVAL; 284 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 285 status, i, osb->slot_num); 286 goto bail; 287 } 288 /* the array now has one ref, so drop this one */ 289 iput(new); 290 } 291 292 bail: 293 mlog_exit(status); 294 return status; 295 } 296 297 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 298 { 299 int i; 300 struct inode *inode; 301 302 mlog_entry_void(); 303 304 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 305 inode = osb->system_inodes[i]; 306 if (inode) { 307 iput(inode); 308 osb->system_inodes[i] = NULL; 309 } 310 } 311 312 inode = osb->sys_root_inode; 313 if (inode) { 314 iput(inode); 315 osb->sys_root_inode = NULL; 316 } 317 318 inode = osb->root_inode; 319 if (inode) { 320 iput(inode); 321 osb->root_inode = NULL; 322 } 323 324 mlog_exit(0); 325 } 326 327 /* We're allocating fs objects, use GFP_NOFS */ 328 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 329 { 330 struct ocfs2_inode_info *oi; 331 332 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 333 if (!oi) 334 return NULL; 335 336 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 337 return &oi->vfs_inode; 338 } 339 340 static void ocfs2_destroy_inode(struct inode *inode) 341 { 342 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 343 } 344 345 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 346 unsigned int cbits) 347 { 348 unsigned int bytes = 1 << cbits; 349 unsigned int trim = bytes; 350 unsigned int bitshift = 32; 351 352 /* 353 * i_size and all block offsets in ocfs2 are always 64 bits 354 * wide. i_clusters is 32 bits, in cluster-sized units. So on 355 * 64 bit platforms, cluster size will be the limiting factor. 356 */ 357 358 #if BITS_PER_LONG == 32 359 # if defined(CONFIG_LBD) 360 BUILD_BUG_ON(sizeof(sector_t) != 8); 361 /* 362 * We might be limited by page cache size. 363 */ 364 if (bytes > PAGE_CACHE_SIZE) { 365 bytes = PAGE_CACHE_SIZE; 366 trim = 1; 367 /* 368 * Shift by 31 here so that we don't get larger than 369 * MAX_LFS_FILESIZE 370 */ 371 bitshift = 31; 372 } 373 # else 374 /* 375 * We are limited by the size of sector_t. Use block size, as 376 * that's what we expose to the VFS. 377 */ 378 bytes = 1 << bbits; 379 trim = 1; 380 bitshift = 31; 381 # endif 382 #endif 383 384 /* 385 * Trim by a whole cluster when we can actually approach the 386 * on-disk limits. Otherwise we can overflow i_clusters when 387 * an extent start is at the max offset. 388 */ 389 return (((unsigned long long)bytes) << bitshift) - trim; 390 } 391 392 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 393 { 394 int incompat_features; 395 int ret = 0; 396 struct mount_options parsed_options; 397 struct ocfs2_super *osb = OCFS2_SB(sb); 398 399 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 400 ret = -EINVAL; 401 goto out; 402 } 403 404 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 405 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 406 ret = -EINVAL; 407 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 408 goto out; 409 } 410 411 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 412 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 413 ret = -EINVAL; 414 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 415 goto out; 416 } 417 418 /* Probably don't want this on remount; it might 419 * mess with other nodes */ 420 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 421 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 422 ret = -EINVAL; 423 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 424 goto out; 425 } 426 427 /* We're going to/from readonly mode. */ 428 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 429 /* Lock here so the check of HARD_RO and the potential 430 * setting of SOFT_RO is atomic. */ 431 spin_lock(&osb->osb_lock); 432 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 433 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 434 ret = -EROFS; 435 goto unlock_osb; 436 } 437 438 if (*flags & MS_RDONLY) { 439 mlog(0, "Going to ro mode.\n"); 440 sb->s_flags |= MS_RDONLY; 441 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 442 } else { 443 mlog(0, "Making ro filesystem writeable.\n"); 444 445 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 446 mlog(ML_ERROR, "Cannot remount RDWR " 447 "filesystem due to previous errors.\n"); 448 ret = -EROFS; 449 goto unlock_osb; 450 } 451 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 452 if (incompat_features) { 453 mlog(ML_ERROR, "Cannot remount RDWR because " 454 "of unsupported optional features " 455 "(%x).\n", incompat_features); 456 ret = -EINVAL; 457 goto unlock_osb; 458 } 459 sb->s_flags &= ~MS_RDONLY; 460 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 461 } 462 unlock_osb: 463 spin_unlock(&osb->osb_lock); 464 } 465 466 if (!ret) { 467 /* Only save off the new mount options in case of a successful 468 * remount. */ 469 osb->s_mount_opt = parsed_options.mount_opt; 470 osb->s_atime_quantum = parsed_options.atime_quantum; 471 osb->preferred_slot = parsed_options.slot; 472 if (parsed_options.commit_interval) 473 osb->osb_commit_interval = parsed_options.commit_interval; 474 475 if (!ocfs2_is_hard_readonly(osb)) 476 ocfs2_set_journal_params(osb); 477 } 478 out: 479 return ret; 480 } 481 482 static int ocfs2_sb_probe(struct super_block *sb, 483 struct buffer_head **bh, 484 int *sector_size) 485 { 486 int status, tmpstat; 487 struct ocfs1_vol_disk_hdr *hdr; 488 struct ocfs2_dinode *di; 489 int blksize; 490 491 *bh = NULL; 492 493 /* may be > 512 */ 494 *sector_size = bdev_hardsect_size(sb->s_bdev); 495 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 496 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 497 *sector_size, OCFS2_MAX_BLOCKSIZE); 498 status = -EINVAL; 499 goto bail; 500 } 501 502 /* Can this really happen? */ 503 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 504 *sector_size = OCFS2_MIN_BLOCKSIZE; 505 506 /* check block zero for old format */ 507 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 508 if (status < 0) { 509 mlog_errno(status); 510 goto bail; 511 } 512 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 513 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 514 mlog(ML_ERROR, "incompatible version: %u.%u\n", 515 hdr->major_version, hdr->minor_version); 516 status = -EINVAL; 517 } 518 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 519 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 520 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 521 hdr->signature); 522 status = -EINVAL; 523 } 524 brelse(*bh); 525 *bh = NULL; 526 if (status < 0) { 527 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 528 "upgraded before mounting with ocfs v2\n"); 529 goto bail; 530 } 531 532 /* 533 * Now check at magic offset for 512, 1024, 2048, 4096 534 * blocksizes. 4096 is the maximum blocksize because it is 535 * the minimum clustersize. 536 */ 537 status = -EINVAL; 538 for (blksize = *sector_size; 539 blksize <= OCFS2_MAX_BLOCKSIZE; 540 blksize <<= 1) { 541 tmpstat = ocfs2_get_sector(sb, bh, 542 OCFS2_SUPER_BLOCK_BLKNO, 543 blksize); 544 if (tmpstat < 0) { 545 status = tmpstat; 546 mlog_errno(status); 547 goto bail; 548 } 549 di = (struct ocfs2_dinode *) (*bh)->b_data; 550 status = ocfs2_verify_volume(di, *bh, blksize); 551 if (status >= 0) 552 goto bail; 553 brelse(*bh); 554 *bh = NULL; 555 if (status != -EAGAIN) 556 break; 557 } 558 559 bail: 560 return status; 561 } 562 563 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 564 { 565 if (ocfs2_mount_local(osb)) { 566 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 567 mlog(ML_ERROR, "Cannot heartbeat on a locally " 568 "mounted device.\n"); 569 return -EINVAL; 570 } 571 } 572 573 if (ocfs2_userspace_stack(osb)) { 574 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 575 mlog(ML_ERROR, "Userspace stack expected, but " 576 "o2cb heartbeat arguments passed to mount\n"); 577 return -EINVAL; 578 } 579 } 580 581 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 582 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 583 !ocfs2_userspace_stack(osb)) { 584 mlog(ML_ERROR, "Heartbeat has to be started to mount " 585 "a read-write clustered device.\n"); 586 return -EINVAL; 587 } 588 } 589 590 return 0; 591 } 592 593 /* 594 * If we're using a userspace stack, mount should have passed 595 * a name that matches the disk. If not, mount should not 596 * have passed a stack. 597 */ 598 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 599 struct mount_options *mopt) 600 { 601 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 602 mlog(ML_ERROR, 603 "cluster stack passed to mount, but this filesystem " 604 "does not support it\n"); 605 return -EINVAL; 606 } 607 608 if (ocfs2_userspace_stack(osb) && 609 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 610 OCFS2_STACK_LABEL_LEN)) { 611 mlog(ML_ERROR, 612 "cluster stack passed to mount (\"%s\") does not " 613 "match the filesystem (\"%s\")\n", 614 mopt->cluster_stack, 615 osb->osb_cluster_stack); 616 return -EINVAL; 617 } 618 619 return 0; 620 } 621 622 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 623 { 624 struct dentry *root; 625 int status, sector_size; 626 struct mount_options parsed_options; 627 struct inode *inode = NULL; 628 struct ocfs2_super *osb = NULL; 629 struct buffer_head *bh = NULL; 630 char nodestr[8]; 631 632 mlog_entry("%p, %p, %i", sb, data, silent); 633 634 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 635 status = -EINVAL; 636 goto read_super_error; 637 } 638 639 /* probe for superblock */ 640 status = ocfs2_sb_probe(sb, &bh, §or_size); 641 if (status < 0) { 642 mlog(ML_ERROR, "superblock probe failed!\n"); 643 goto read_super_error; 644 } 645 646 status = ocfs2_initialize_super(sb, bh, sector_size); 647 osb = OCFS2_SB(sb); 648 if (status < 0) { 649 mlog_errno(status); 650 goto read_super_error; 651 } 652 brelse(bh); 653 bh = NULL; 654 osb->s_mount_opt = parsed_options.mount_opt; 655 osb->s_atime_quantum = parsed_options.atime_quantum; 656 osb->preferred_slot = parsed_options.slot; 657 osb->osb_commit_interval = parsed_options.commit_interval; 658 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt); 659 osb->local_alloc_bits = osb->local_alloc_default_bits; 660 661 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 662 if (status) 663 goto read_super_error; 664 665 sb->s_magic = OCFS2_SUPER_MAGIC; 666 667 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 668 * heartbeat=none */ 669 if (bdev_read_only(sb->s_bdev)) { 670 if (!(sb->s_flags & MS_RDONLY)) { 671 status = -EACCES; 672 mlog(ML_ERROR, "Readonly device detected but readonly " 673 "mount was not specified.\n"); 674 goto read_super_error; 675 } 676 677 /* You should not be able to start a local heartbeat 678 * on a readonly device. */ 679 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 680 status = -EROFS; 681 mlog(ML_ERROR, "Local heartbeat specified on readonly " 682 "device.\n"); 683 goto read_super_error; 684 } 685 686 status = ocfs2_check_journals_nolocks(osb); 687 if (status < 0) { 688 if (status == -EROFS) 689 mlog(ML_ERROR, "Recovery required on readonly " 690 "file system, but write access is " 691 "unavailable.\n"); 692 else 693 mlog_errno(status); 694 goto read_super_error; 695 } 696 697 ocfs2_set_ro_flag(osb, 1); 698 699 printk(KERN_NOTICE "Readonly device detected. No cluster " 700 "services will be utilized for this mount. Recovery " 701 "will be skipped.\n"); 702 } 703 704 if (!ocfs2_is_hard_readonly(osb)) { 705 if (sb->s_flags & MS_RDONLY) 706 ocfs2_set_ro_flag(osb, 0); 707 } 708 709 status = ocfs2_verify_heartbeat(osb); 710 if (status < 0) { 711 mlog_errno(status); 712 goto read_super_error; 713 } 714 715 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 716 ocfs2_debugfs_root); 717 if (!osb->osb_debug_root) { 718 status = -EINVAL; 719 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 720 goto read_super_error; 721 } 722 723 status = ocfs2_mount_volume(sb); 724 if (osb->root_inode) 725 inode = igrab(osb->root_inode); 726 727 if (status < 0) 728 goto read_super_error; 729 730 if (!inode) { 731 status = -EIO; 732 mlog_errno(status); 733 goto read_super_error; 734 } 735 736 root = d_alloc_root(inode); 737 if (!root) { 738 status = -ENOMEM; 739 mlog_errno(status); 740 goto read_super_error; 741 } 742 743 sb->s_root = root; 744 745 ocfs2_complete_mount_recovery(osb); 746 747 if (ocfs2_mount_local(osb)) 748 snprintf(nodestr, sizeof(nodestr), "local"); 749 else 750 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 751 752 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 753 "with %s data mode.\n", 754 osb->dev_str, nodestr, osb->slot_num, 755 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 756 "ordered"); 757 758 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 759 wake_up(&osb->osb_mount_event); 760 761 mlog_exit(status); 762 return status; 763 764 read_super_error: 765 brelse(bh); 766 767 if (inode) 768 iput(inode); 769 770 if (osb) { 771 atomic_set(&osb->vol_state, VOLUME_DISABLED); 772 wake_up(&osb->osb_mount_event); 773 ocfs2_dismount_volume(sb, 1); 774 } 775 776 mlog_exit(status); 777 return status; 778 } 779 780 static int ocfs2_get_sb(struct file_system_type *fs_type, 781 int flags, 782 const char *dev_name, 783 void *data, 784 struct vfsmount *mnt) 785 { 786 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 787 mnt); 788 } 789 790 static struct file_system_type ocfs2_fs_type = { 791 .owner = THIS_MODULE, 792 .name = "ocfs2", 793 .get_sb = ocfs2_get_sb, /* is this called when we mount 794 * the fs? */ 795 .kill_sb = kill_block_super, /* set to the generic one 796 * right now, but do we 797 * need to change that? */ 798 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 799 .next = NULL 800 }; 801 802 static int ocfs2_parse_options(struct super_block *sb, 803 char *options, 804 struct mount_options *mopt, 805 int is_remount) 806 { 807 int status; 808 char *p; 809 810 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 811 options ? options : "(none)"); 812 813 mopt->commit_interval = 0; 814 mopt->mount_opt = 0; 815 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 816 mopt->slot = OCFS2_INVALID_SLOT; 817 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE; 818 mopt->cluster_stack[0] = '\0'; 819 820 if (!options) { 821 status = 1; 822 goto bail; 823 } 824 825 while ((p = strsep(&options, ",")) != NULL) { 826 int token, option; 827 substring_t args[MAX_OPT_ARGS]; 828 829 if (!*p) 830 continue; 831 832 token = match_token(p, tokens, args); 833 switch (token) { 834 case Opt_hb_local: 835 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 836 break; 837 case Opt_hb_none: 838 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 839 break; 840 case Opt_barrier: 841 if (match_int(&args[0], &option)) { 842 status = 0; 843 goto bail; 844 } 845 if (option) 846 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 847 else 848 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 849 break; 850 case Opt_intr: 851 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 852 break; 853 case Opt_nointr: 854 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 855 break; 856 case Opt_err_panic: 857 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 858 break; 859 case Opt_err_ro: 860 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 861 break; 862 case Opt_data_ordered: 863 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 864 break; 865 case Opt_data_writeback: 866 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 867 break; 868 case Opt_user_xattr: 869 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 870 break; 871 case Opt_nouser_xattr: 872 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 873 break; 874 case Opt_atime_quantum: 875 if (match_int(&args[0], &option)) { 876 status = 0; 877 goto bail; 878 } 879 if (option >= 0) 880 mopt->atime_quantum = option; 881 break; 882 case Opt_slot: 883 option = 0; 884 if (match_int(&args[0], &option)) { 885 status = 0; 886 goto bail; 887 } 888 if (option) 889 mopt->slot = (s16)option; 890 break; 891 case Opt_commit: 892 option = 0; 893 if (match_int(&args[0], &option)) { 894 status = 0; 895 goto bail; 896 } 897 if (option < 0) 898 return 0; 899 if (option == 0) 900 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 901 mopt->commit_interval = HZ * option; 902 break; 903 case Opt_localalloc: 904 option = 0; 905 if (match_int(&args[0], &option)) { 906 status = 0; 907 goto bail; 908 } 909 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8)) 910 mopt->localalloc_opt = option; 911 break; 912 case Opt_localflocks: 913 /* 914 * Changing this during remount could race 915 * flock() requests, or "unbalance" existing 916 * ones (e.g., a lock is taken in one mode but 917 * dropped in the other). If users care enough 918 * to flip locking modes during remount, we 919 * could add a "local" flag to individual 920 * flock structures for proper tracking of 921 * state. 922 */ 923 if (!is_remount) 924 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 925 break; 926 case Opt_stack: 927 /* Check both that the option we were passed 928 * is of the right length and that it is a proper 929 * string of the right length. 930 */ 931 if (((args[0].to - args[0].from) != 932 OCFS2_STACK_LABEL_LEN) || 933 (strnlen(args[0].from, 934 OCFS2_STACK_LABEL_LEN) != 935 OCFS2_STACK_LABEL_LEN)) { 936 mlog(ML_ERROR, 937 "Invalid cluster_stack option\n"); 938 status = 0; 939 goto bail; 940 } 941 memcpy(mopt->cluster_stack, args[0].from, 942 OCFS2_STACK_LABEL_LEN); 943 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 944 break; 945 case Opt_inode64: 946 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 947 break; 948 default: 949 mlog(ML_ERROR, 950 "Unrecognized mount option \"%s\" " 951 "or missing value\n", p); 952 status = 0; 953 goto bail; 954 } 955 } 956 957 status = 1; 958 959 bail: 960 mlog_exit(status); 961 return status; 962 } 963 964 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 965 { 966 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 967 unsigned long opts = osb->s_mount_opt; 968 unsigned int local_alloc_megs; 969 970 if (opts & OCFS2_MOUNT_HB_LOCAL) 971 seq_printf(s, ",_netdev,heartbeat=local"); 972 else 973 seq_printf(s, ",heartbeat=none"); 974 975 if (opts & OCFS2_MOUNT_NOINTR) 976 seq_printf(s, ",nointr"); 977 978 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 979 seq_printf(s, ",data=writeback"); 980 else 981 seq_printf(s, ",data=ordered"); 982 983 if (opts & OCFS2_MOUNT_BARRIER) 984 seq_printf(s, ",barrier=1"); 985 986 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 987 seq_printf(s, ",errors=panic"); 988 else 989 seq_printf(s, ",errors=remount-ro"); 990 991 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 992 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 993 994 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 995 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 996 997 if (osb->osb_commit_interval) 998 seq_printf(s, ",commit=%u", 999 (unsigned) (osb->osb_commit_interval / HZ)); 1000 1001 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1002 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE) 1003 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1004 1005 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1006 seq_printf(s, ",localflocks,"); 1007 1008 if (osb->osb_cluster_stack[0]) 1009 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1010 osb->osb_cluster_stack); 1011 1012 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1013 seq_printf(s, ",nouser_xattr"); 1014 else 1015 seq_printf(s, ",user_xattr"); 1016 1017 if (opts & OCFS2_MOUNT_INODE64) 1018 seq_printf(s, ",inode64"); 1019 1020 return 0; 1021 } 1022 1023 static int __init ocfs2_init(void) 1024 { 1025 int status; 1026 1027 mlog_entry_void(); 1028 1029 ocfs2_print_version(); 1030 1031 status = init_ocfs2_uptodate_cache(); 1032 if (status < 0) { 1033 mlog_errno(status); 1034 goto leave; 1035 } 1036 1037 status = ocfs2_initialize_mem_caches(); 1038 if (status < 0) { 1039 mlog_errno(status); 1040 goto leave; 1041 } 1042 1043 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1044 if (!ocfs2_wq) { 1045 status = -ENOMEM; 1046 goto leave; 1047 } 1048 1049 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1050 if (!ocfs2_debugfs_root) { 1051 status = -EFAULT; 1052 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1053 } 1054 1055 ocfs2_set_locking_protocol(); 1056 1057 leave: 1058 if (status < 0) { 1059 ocfs2_free_mem_caches(); 1060 exit_ocfs2_uptodate_cache(); 1061 } 1062 1063 mlog_exit(status); 1064 1065 if (status >= 0) { 1066 return register_filesystem(&ocfs2_fs_type); 1067 } else 1068 return -1; 1069 } 1070 1071 static void __exit ocfs2_exit(void) 1072 { 1073 mlog_entry_void(); 1074 1075 if (ocfs2_wq) { 1076 flush_workqueue(ocfs2_wq); 1077 destroy_workqueue(ocfs2_wq); 1078 } 1079 1080 debugfs_remove(ocfs2_debugfs_root); 1081 1082 ocfs2_free_mem_caches(); 1083 1084 unregister_filesystem(&ocfs2_fs_type); 1085 1086 exit_ocfs2_uptodate_cache(); 1087 1088 mlog_exit_void(); 1089 } 1090 1091 static void ocfs2_put_super(struct super_block *sb) 1092 { 1093 mlog_entry("(0x%p)\n", sb); 1094 1095 ocfs2_sync_blockdev(sb); 1096 ocfs2_dismount_volume(sb, 0); 1097 1098 mlog_exit_void(); 1099 } 1100 1101 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1102 { 1103 struct ocfs2_super *osb; 1104 u32 numbits, freebits; 1105 int status; 1106 struct ocfs2_dinode *bm_lock; 1107 struct buffer_head *bh = NULL; 1108 struct inode *inode = NULL; 1109 1110 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1111 1112 osb = OCFS2_SB(dentry->d_sb); 1113 1114 inode = ocfs2_get_system_file_inode(osb, 1115 GLOBAL_BITMAP_SYSTEM_INODE, 1116 OCFS2_INVALID_SLOT); 1117 if (!inode) { 1118 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1119 status = -EIO; 1120 goto bail; 1121 } 1122 1123 status = ocfs2_inode_lock(inode, &bh, 0); 1124 if (status < 0) { 1125 mlog_errno(status); 1126 goto bail; 1127 } 1128 1129 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1130 1131 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1132 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1133 1134 buf->f_type = OCFS2_SUPER_MAGIC; 1135 buf->f_bsize = dentry->d_sb->s_blocksize; 1136 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1137 buf->f_blocks = ((sector_t) numbits) * 1138 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1139 buf->f_bfree = ((sector_t) freebits) * 1140 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1141 buf->f_bavail = buf->f_bfree; 1142 buf->f_files = numbits; 1143 buf->f_ffree = freebits; 1144 1145 brelse(bh); 1146 1147 ocfs2_inode_unlock(inode, 0); 1148 status = 0; 1149 bail: 1150 if (inode) 1151 iput(inode); 1152 1153 mlog_exit(status); 1154 1155 return status; 1156 } 1157 1158 static void ocfs2_inode_init_once(void *data) 1159 { 1160 struct ocfs2_inode_info *oi = data; 1161 1162 oi->ip_flags = 0; 1163 oi->ip_open_count = 0; 1164 spin_lock_init(&oi->ip_lock); 1165 ocfs2_extent_map_init(&oi->vfs_inode); 1166 INIT_LIST_HEAD(&oi->ip_io_markers); 1167 oi->ip_created_trans = 0; 1168 oi->ip_last_trans = 0; 1169 oi->ip_dir_start_lookup = 0; 1170 1171 init_rwsem(&oi->ip_alloc_sem); 1172 init_rwsem(&oi->ip_xattr_sem); 1173 mutex_init(&oi->ip_io_mutex); 1174 1175 oi->ip_blkno = 0ULL; 1176 oi->ip_clusters = 0; 1177 1178 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1179 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1180 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1181 1182 ocfs2_metadata_cache_init(&oi->vfs_inode); 1183 1184 inode_init_once(&oi->vfs_inode); 1185 } 1186 1187 static int ocfs2_initialize_mem_caches(void) 1188 { 1189 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1190 sizeof(struct ocfs2_inode_info), 1191 0, 1192 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1193 SLAB_MEM_SPREAD), 1194 ocfs2_inode_init_once); 1195 if (!ocfs2_inode_cachep) 1196 return -ENOMEM; 1197 1198 return 0; 1199 } 1200 1201 static void ocfs2_free_mem_caches(void) 1202 { 1203 if (ocfs2_inode_cachep) 1204 kmem_cache_destroy(ocfs2_inode_cachep); 1205 1206 ocfs2_inode_cachep = NULL; 1207 } 1208 1209 static int ocfs2_get_sector(struct super_block *sb, 1210 struct buffer_head **bh, 1211 int block, 1212 int sect_size) 1213 { 1214 if (!sb_set_blocksize(sb, sect_size)) { 1215 mlog(ML_ERROR, "unable to set blocksize\n"); 1216 return -EIO; 1217 } 1218 1219 *bh = sb_getblk(sb, block); 1220 if (!*bh) { 1221 mlog_errno(-EIO); 1222 return -EIO; 1223 } 1224 lock_buffer(*bh); 1225 if (!buffer_dirty(*bh)) 1226 clear_buffer_uptodate(*bh); 1227 unlock_buffer(*bh); 1228 ll_rw_block(READ, 1, bh); 1229 wait_on_buffer(*bh); 1230 return 0; 1231 } 1232 1233 static int ocfs2_mount_volume(struct super_block *sb) 1234 { 1235 int status = 0; 1236 int unlock_super = 0; 1237 struct ocfs2_super *osb = OCFS2_SB(sb); 1238 1239 mlog_entry_void(); 1240 1241 if (ocfs2_is_hard_readonly(osb)) 1242 goto leave; 1243 1244 status = ocfs2_dlm_init(osb); 1245 if (status < 0) { 1246 mlog_errno(status); 1247 goto leave; 1248 } 1249 1250 status = ocfs2_super_lock(osb, 1); 1251 if (status < 0) { 1252 mlog_errno(status); 1253 goto leave; 1254 } 1255 unlock_super = 1; 1256 1257 /* This will load up the node map and add ourselves to it. */ 1258 status = ocfs2_find_slot(osb); 1259 if (status < 0) { 1260 mlog_errno(status); 1261 goto leave; 1262 } 1263 1264 /* load all node-local system inodes */ 1265 status = ocfs2_init_local_system_inodes(osb); 1266 if (status < 0) { 1267 mlog_errno(status); 1268 goto leave; 1269 } 1270 1271 status = ocfs2_check_volume(osb); 1272 if (status < 0) { 1273 mlog_errno(status); 1274 goto leave; 1275 } 1276 1277 status = ocfs2_truncate_log_init(osb); 1278 if (status < 0) { 1279 mlog_errno(status); 1280 goto leave; 1281 } 1282 1283 if (ocfs2_mount_local(osb)) 1284 goto leave; 1285 1286 leave: 1287 if (unlock_super) 1288 ocfs2_super_unlock(osb, 1); 1289 1290 mlog_exit(status); 1291 return status; 1292 } 1293 1294 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1295 { 1296 int tmp, hangup_needed = 0; 1297 struct ocfs2_super *osb = NULL; 1298 char nodestr[8]; 1299 1300 mlog_entry("(0x%p)\n", sb); 1301 1302 BUG_ON(!sb); 1303 osb = OCFS2_SB(sb); 1304 BUG_ON(!osb); 1305 1306 ocfs2_shutdown_local_alloc(osb); 1307 1308 ocfs2_truncate_log_shutdown(osb); 1309 1310 /* This will disable recovery and flush any recovery work. */ 1311 ocfs2_recovery_exit(osb); 1312 1313 ocfs2_journal_shutdown(osb); 1314 1315 ocfs2_sync_blockdev(sb); 1316 1317 /* No cluster connection means we've failed during mount, so skip 1318 * all the steps which depended on that to complete. */ 1319 if (osb->cconn) { 1320 tmp = ocfs2_super_lock(osb, 1); 1321 if (tmp < 0) { 1322 mlog_errno(tmp); 1323 return; 1324 } 1325 } 1326 1327 if (osb->slot_num != OCFS2_INVALID_SLOT) 1328 ocfs2_put_slot(osb); 1329 1330 if (osb->cconn) 1331 ocfs2_super_unlock(osb, 1); 1332 1333 ocfs2_release_system_inodes(osb); 1334 1335 /* 1336 * If we're dismounting due to mount error, mount.ocfs2 will clean 1337 * up heartbeat. If we're a local mount, there is no heartbeat. 1338 * If we failed before we got a uuid_str yet, we can't stop 1339 * heartbeat. Otherwise, do it. 1340 */ 1341 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1342 hangup_needed = 1; 1343 1344 if (osb->cconn) 1345 ocfs2_dlm_shutdown(osb, hangup_needed); 1346 1347 debugfs_remove(osb->osb_debug_root); 1348 1349 if (hangup_needed) 1350 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1351 1352 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1353 1354 if (ocfs2_mount_local(osb)) 1355 snprintf(nodestr, sizeof(nodestr), "local"); 1356 else 1357 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1358 1359 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1360 osb->dev_str, nodestr); 1361 1362 ocfs2_delete_osb(osb); 1363 kfree(osb); 1364 sb->s_dev = 0; 1365 sb->s_fs_info = NULL; 1366 } 1367 1368 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1369 unsigned uuid_bytes) 1370 { 1371 int i, ret; 1372 char *ptr; 1373 1374 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1375 1376 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1377 if (osb->uuid_str == NULL) 1378 return -ENOMEM; 1379 1380 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1381 /* print with null */ 1382 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1383 if (ret != 2) /* drop super cleans up */ 1384 return -EINVAL; 1385 /* then only advance past the last char */ 1386 ptr += 2; 1387 } 1388 1389 return 0; 1390 } 1391 1392 static int ocfs2_initialize_super(struct super_block *sb, 1393 struct buffer_head *bh, 1394 int sector_size) 1395 { 1396 int status; 1397 int i, cbits, bbits; 1398 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1399 struct inode *inode = NULL; 1400 struct ocfs2_journal *journal; 1401 __le32 uuid_net_key; 1402 struct ocfs2_super *osb; 1403 1404 mlog_entry_void(); 1405 1406 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 1407 if (!osb) { 1408 status = -ENOMEM; 1409 mlog_errno(status); 1410 goto bail; 1411 } 1412 1413 sb->s_fs_info = osb; 1414 sb->s_op = &ocfs2_sops; 1415 sb->s_export_op = &ocfs2_export_ops; 1416 sb->s_xattr = ocfs2_xattr_handlers; 1417 sb->s_time_gran = 1; 1418 sb->s_flags |= MS_NOATIME; 1419 /* this is needed to support O_LARGEFILE */ 1420 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1421 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 1422 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 1423 1424 osb->sb = sb; 1425 /* Save off for ocfs2_rw_direct */ 1426 osb->s_sectsize_bits = blksize_bits(sector_size); 1427 BUG_ON(!osb->s_sectsize_bits); 1428 1429 spin_lock_init(&osb->dc_task_lock); 1430 init_waitqueue_head(&osb->dc_event); 1431 osb->dc_work_sequence = 0; 1432 osb->dc_wake_sequence = 0; 1433 INIT_LIST_HEAD(&osb->blocked_lock_list); 1434 osb->blocked_lock_count = 0; 1435 spin_lock_init(&osb->osb_lock); 1436 ocfs2_init_inode_steal_slot(osb); 1437 1438 atomic_set(&osb->alloc_stats.moves, 0); 1439 atomic_set(&osb->alloc_stats.local_data, 0); 1440 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1441 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1442 atomic_set(&osb->alloc_stats.bg_extends, 0); 1443 1444 ocfs2_init_node_maps(osb); 1445 1446 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1447 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1448 1449 status = ocfs2_recovery_init(osb); 1450 if (status) { 1451 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 1452 mlog_errno(status); 1453 goto bail; 1454 } 1455 1456 init_waitqueue_head(&osb->checkpoint_event); 1457 atomic_set(&osb->needs_checkpoint, 0); 1458 1459 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1460 1461 osb->slot_num = OCFS2_INVALID_SLOT; 1462 1463 osb->s_xattr_inline_size = le16_to_cpu( 1464 di->id2.i_super.s_xattr_inline_size); 1465 1466 osb->local_alloc_state = OCFS2_LA_UNUSED; 1467 osb->local_alloc_bh = NULL; 1468 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 1469 1470 init_waitqueue_head(&osb->osb_mount_event); 1471 1472 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1473 if (!osb->vol_label) { 1474 mlog(ML_ERROR, "unable to alloc vol label\n"); 1475 status = -ENOMEM; 1476 goto bail; 1477 } 1478 1479 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1480 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1481 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1482 osb->max_slots); 1483 status = -EINVAL; 1484 goto bail; 1485 } 1486 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 1487 1488 osb->slot_recovery_generations = 1489 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 1490 GFP_KERNEL); 1491 if (!osb->slot_recovery_generations) { 1492 status = -ENOMEM; 1493 mlog_errno(status); 1494 goto bail; 1495 } 1496 1497 init_waitqueue_head(&osb->osb_wipe_event); 1498 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 1499 sizeof(*osb->osb_orphan_wipes), 1500 GFP_KERNEL); 1501 if (!osb->osb_orphan_wipes) { 1502 status = -ENOMEM; 1503 mlog_errno(status); 1504 goto bail; 1505 } 1506 1507 osb->s_feature_compat = 1508 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 1509 osb->s_feature_ro_compat = 1510 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 1511 osb->s_feature_incompat = 1512 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 1513 1514 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 1515 mlog(ML_ERROR, "couldn't mount because of unsupported " 1516 "optional features (%x).\n", i); 1517 status = -EINVAL; 1518 goto bail; 1519 } 1520 if (!(osb->sb->s_flags & MS_RDONLY) && 1521 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 1522 mlog(ML_ERROR, "couldn't mount RDWR because of " 1523 "unsupported optional features (%x).\n", i); 1524 status = -EINVAL; 1525 goto bail; 1526 } 1527 1528 if (ocfs2_userspace_stack(osb)) { 1529 memcpy(osb->osb_cluster_stack, 1530 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 1531 OCFS2_STACK_LABEL_LEN); 1532 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1533 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 1534 mlog(ML_ERROR, 1535 "couldn't mount because of an invalid " 1536 "cluster stack label (%s) \n", 1537 osb->osb_cluster_stack); 1538 status = -EINVAL; 1539 goto bail; 1540 } 1541 } else { 1542 /* The empty string is identical with classic tools that 1543 * don't know about s_cluster_info. */ 1544 osb->osb_cluster_stack[0] = '\0'; 1545 } 1546 1547 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 1548 1549 /* FIXME 1550 * This should be done in ocfs2_journal_init(), but unknown 1551 * ordering issues will cause the filesystem to crash. 1552 * If anyone wants to figure out what part of the code 1553 * refers to osb->journal before ocfs2_journal_init() is run, 1554 * be my guest. 1555 */ 1556 /* initialize our journal structure */ 1557 1558 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 1559 if (!journal) { 1560 mlog(ML_ERROR, "unable to alloc journal\n"); 1561 status = -ENOMEM; 1562 goto bail; 1563 } 1564 osb->journal = journal; 1565 journal->j_osb = osb; 1566 1567 atomic_set(&journal->j_num_trans, 0); 1568 init_rwsem(&journal->j_trans_barrier); 1569 init_waitqueue_head(&journal->j_checkpointed); 1570 spin_lock_init(&journal->j_lock); 1571 journal->j_trans_id = (unsigned long) 1; 1572 INIT_LIST_HEAD(&journal->j_la_cleanups); 1573 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 1574 journal->j_state = OCFS2_JOURNAL_FREE; 1575 1576 /* get some pseudo constants for clustersize bits */ 1577 osb->s_clustersize_bits = 1578 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1579 osb->s_clustersize = 1 << osb->s_clustersize_bits; 1580 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 1581 1582 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 1583 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 1584 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 1585 osb->s_clustersize); 1586 status = -EINVAL; 1587 goto bail; 1588 } 1589 1590 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 1591 > (u32)~0UL) { 1592 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 1593 "what jbd can address in 32 bits.\n"); 1594 status = -EINVAL; 1595 goto bail; 1596 } 1597 1598 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 1599 sizeof(di->id2.i_super.s_uuid))) { 1600 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 1601 status = -ENOMEM; 1602 goto bail; 1603 } 1604 1605 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 1606 1607 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 1608 osb->vol_label[63] = '\0'; 1609 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 1610 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 1611 osb->first_cluster_group_blkno = 1612 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 1613 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 1614 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 1615 mlog(0, "vol_label: %s\n", osb->vol_label); 1616 mlog(0, "uuid: %s\n", osb->uuid_str); 1617 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 1618 (unsigned long long)osb->root_blkno, 1619 (unsigned long long)osb->system_dir_blkno); 1620 1621 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 1622 if (!osb->osb_dlm_debug) { 1623 status = -ENOMEM; 1624 mlog_errno(status); 1625 goto bail; 1626 } 1627 1628 atomic_set(&osb->vol_state, VOLUME_INIT); 1629 1630 /* load root, system_dir, and all global system inodes */ 1631 status = ocfs2_init_global_system_inodes(osb); 1632 if (status < 0) { 1633 mlog_errno(status); 1634 goto bail; 1635 } 1636 1637 /* 1638 * global bitmap 1639 */ 1640 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 1641 OCFS2_INVALID_SLOT); 1642 if (!inode) { 1643 status = -EINVAL; 1644 mlog_errno(status); 1645 goto bail; 1646 } 1647 1648 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 1649 iput(inode); 1650 1651 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8; 1652 1653 status = ocfs2_init_slot_info(osb); 1654 if (status < 0) { 1655 mlog_errno(status); 1656 goto bail; 1657 } 1658 1659 bail: 1660 mlog_exit(status); 1661 return status; 1662 } 1663 1664 /* 1665 * will return: -EAGAIN if it is ok to keep searching for superblocks 1666 * -EINVAL if there is a bad superblock 1667 * 0 on success 1668 */ 1669 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 1670 struct buffer_head *bh, 1671 u32 blksz) 1672 { 1673 int status = -EAGAIN; 1674 1675 mlog_entry_void(); 1676 1677 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 1678 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 1679 status = -EINVAL; 1680 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 1681 mlog(ML_ERROR, "found superblock with incorrect block " 1682 "size: found %u, should be %u\n", 1683 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 1684 blksz); 1685 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 1686 OCFS2_MAJOR_REV_LEVEL || 1687 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 1688 OCFS2_MINOR_REV_LEVEL) { 1689 mlog(ML_ERROR, "found superblock with bad version: " 1690 "found %u.%u, should be %u.%u\n", 1691 le16_to_cpu(di->id2.i_super.s_major_rev_level), 1692 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 1693 OCFS2_MAJOR_REV_LEVEL, 1694 OCFS2_MINOR_REV_LEVEL); 1695 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 1696 mlog(ML_ERROR, "bad block number on superblock: " 1697 "found %llu, should be %llu\n", 1698 (unsigned long long)le64_to_cpu(di->i_blkno), 1699 (unsigned long long)bh->b_blocknr); 1700 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 1701 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 1702 mlog(ML_ERROR, "bad cluster size found: %u\n", 1703 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 1704 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 1705 mlog(ML_ERROR, "bad root_blkno: 0\n"); 1706 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 1707 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 1708 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 1709 mlog(ML_ERROR, 1710 "Superblock slots found greater than file system " 1711 "maximum: found %u, max %u\n", 1712 le16_to_cpu(di->id2.i_super.s_max_slots), 1713 OCFS2_MAX_SLOTS); 1714 } else { 1715 /* found it! */ 1716 status = 0; 1717 } 1718 } 1719 1720 mlog_exit(status); 1721 return status; 1722 } 1723 1724 static int ocfs2_check_volume(struct ocfs2_super *osb) 1725 { 1726 int status; 1727 int dirty; 1728 int local; 1729 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 1730 * recover 1731 * ourselves. */ 1732 1733 mlog_entry_void(); 1734 1735 /* Init our journal object. */ 1736 status = ocfs2_journal_init(osb->journal, &dirty); 1737 if (status < 0) { 1738 mlog(ML_ERROR, "Could not initialize journal!\n"); 1739 goto finally; 1740 } 1741 1742 /* If the journal was unmounted cleanly then we don't want to 1743 * recover anything. Otherwise, journal_load will do that 1744 * dirty work for us :) */ 1745 if (!dirty) { 1746 status = ocfs2_journal_wipe(osb->journal, 0); 1747 if (status < 0) { 1748 mlog_errno(status); 1749 goto finally; 1750 } 1751 } else { 1752 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 1753 "recovering volume.\n"); 1754 } 1755 1756 local = ocfs2_mount_local(osb); 1757 1758 /* will play back anything left in the journal. */ 1759 status = ocfs2_journal_load(osb->journal, local, dirty); 1760 if (status < 0) { 1761 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 1762 goto finally; 1763 } 1764 1765 if (dirty) { 1766 /* recover my local alloc if we didn't unmount cleanly. */ 1767 status = ocfs2_begin_local_alloc_recovery(osb, 1768 osb->slot_num, 1769 &local_alloc); 1770 if (status < 0) { 1771 mlog_errno(status); 1772 goto finally; 1773 } 1774 /* we complete the recovery process after we've marked 1775 * ourselves as mounted. */ 1776 } 1777 1778 mlog(0, "Journal loaded.\n"); 1779 1780 status = ocfs2_load_local_alloc(osb); 1781 if (status < 0) { 1782 mlog_errno(status); 1783 goto finally; 1784 } 1785 1786 if (dirty) { 1787 /* Recovery will be completed after we've mounted the 1788 * rest of the volume. */ 1789 osb->dirty = 1; 1790 osb->local_alloc_copy = local_alloc; 1791 local_alloc = NULL; 1792 } 1793 1794 /* go through each journal, trylock it and if you get the 1795 * lock, and it's marked as dirty, set the bit in the recover 1796 * map and launch a recovery thread for it. */ 1797 status = ocfs2_mark_dead_nodes(osb); 1798 if (status < 0) 1799 mlog_errno(status); 1800 1801 finally: 1802 if (local_alloc) 1803 kfree(local_alloc); 1804 1805 mlog_exit(status); 1806 return status; 1807 } 1808 1809 /* 1810 * The routine gets called from dismount or close whenever a dismount on 1811 * volume is requested and the osb open count becomes 1. 1812 * It will remove the osb from the global list and also free up all the 1813 * initialized resources and fileobject. 1814 */ 1815 static void ocfs2_delete_osb(struct ocfs2_super *osb) 1816 { 1817 mlog_entry_void(); 1818 1819 /* This function assumes that the caller has the main osb resource */ 1820 1821 ocfs2_free_slot_info(osb); 1822 1823 kfree(osb->osb_orphan_wipes); 1824 kfree(osb->slot_recovery_generations); 1825 /* FIXME 1826 * This belongs in journal shutdown, but because we have to 1827 * allocate osb->journal at the start of ocfs2_initalize_osb(), 1828 * we free it here. 1829 */ 1830 kfree(osb->journal); 1831 if (osb->local_alloc_copy) 1832 kfree(osb->local_alloc_copy); 1833 kfree(osb->uuid_str); 1834 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 1835 memset(osb, 0, sizeof(struct ocfs2_super)); 1836 1837 mlog_exit_void(); 1838 } 1839 1840 /* Put OCFS2 into a readonly state, or (if the user specifies it), 1841 * panic(). We do not support continue-on-error operation. */ 1842 static void ocfs2_handle_error(struct super_block *sb) 1843 { 1844 struct ocfs2_super *osb = OCFS2_SB(sb); 1845 1846 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 1847 panic("OCFS2: (device %s): panic forced after error\n", 1848 sb->s_id); 1849 1850 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 1851 1852 if (sb->s_flags & MS_RDONLY && 1853 (ocfs2_is_soft_readonly(osb) || 1854 ocfs2_is_hard_readonly(osb))) 1855 return; 1856 1857 printk(KERN_CRIT "File system is now read-only due to the potential " 1858 "of on-disk corruption. Please run fsck.ocfs2 once the file " 1859 "system is unmounted.\n"); 1860 sb->s_flags |= MS_RDONLY; 1861 ocfs2_set_ro_flag(osb, 0); 1862 } 1863 1864 static char error_buf[1024]; 1865 1866 void __ocfs2_error(struct super_block *sb, 1867 const char *function, 1868 const char *fmt, ...) 1869 { 1870 va_list args; 1871 1872 va_start(args, fmt); 1873 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1874 va_end(args); 1875 1876 /* Not using mlog here because we want to show the actual 1877 * function the error came from. */ 1878 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 1879 sb->s_id, function, error_buf); 1880 1881 ocfs2_handle_error(sb); 1882 } 1883 1884 /* Handle critical errors. This is intentionally more drastic than 1885 * ocfs2_handle_error, so we only use for things like journal errors, 1886 * etc. */ 1887 void __ocfs2_abort(struct super_block* sb, 1888 const char *function, 1889 const char *fmt, ...) 1890 { 1891 va_list args; 1892 1893 va_start(args, fmt); 1894 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1895 va_end(args); 1896 1897 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 1898 sb->s_id, function, error_buf); 1899 1900 /* We don't have the cluster support yet to go straight to 1901 * hard readonly in here. Until then, we want to keep 1902 * ocfs2_abort() so that we can at least mark critical 1903 * errors. 1904 * 1905 * TODO: This should abort the journal and alert other nodes 1906 * that our slot needs recovery. */ 1907 1908 /* Force a panic(). This stinks, but it's better than letting 1909 * things continue without having a proper hard readonly 1910 * here. */ 1911 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1912 ocfs2_handle_error(sb); 1913 } 1914 1915 module_init(ocfs2_init); 1916 module_exit(ocfs2_exit); 1917