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 #include <linux/quotaops.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 "blockcheck.h" 56 #include "dlmglue.h" 57 #include "export.h" 58 #include "extent_map.h" 59 #include "heartbeat.h" 60 #include "inode.h" 61 #include "journal.h" 62 #include "localalloc.h" 63 #include "namei.h" 64 #include "slot_map.h" 65 #include "super.h" 66 #include "sysfile.h" 67 #include "uptodate.h" 68 #include "ver.h" 69 #include "xattr.h" 70 #include "quota.h" 71 72 #include "buffer_head_io.h" 73 74 static struct kmem_cache *ocfs2_inode_cachep = NULL; 75 struct kmem_cache *ocfs2_dquot_cachep; 76 struct kmem_cache *ocfs2_qf_chunk_cachep; 77 78 /* OCFS2 needs to schedule several differnt types of work which 79 * require cluster locking, disk I/O, recovery waits, etc. Since these 80 * types of work tend to be heavy we avoid using the kernel events 81 * workqueue and schedule on our own. */ 82 struct workqueue_struct *ocfs2_wq = NULL; 83 84 static struct dentry *ocfs2_debugfs_root = NULL; 85 86 MODULE_AUTHOR("Oracle"); 87 MODULE_LICENSE("GPL"); 88 89 struct mount_options 90 { 91 unsigned long commit_interval; 92 unsigned long mount_opt; 93 unsigned int atime_quantum; 94 signed short slot; 95 unsigned int localalloc_opt; 96 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 97 }; 98 99 static int ocfs2_parse_options(struct super_block *sb, char *options, 100 struct mount_options *mopt, 101 int is_remount); 102 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt); 103 static void ocfs2_put_super(struct super_block *sb); 104 static int ocfs2_mount_volume(struct super_block *sb); 105 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 106 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 107 static int ocfs2_initialize_mem_caches(void); 108 static void ocfs2_free_mem_caches(void); 109 static void ocfs2_delete_osb(struct ocfs2_super *osb); 110 111 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 112 113 static int ocfs2_sync_fs(struct super_block *sb, int wait); 114 115 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 116 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 117 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 118 static int ocfs2_check_volume(struct ocfs2_super *osb); 119 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 120 struct buffer_head *bh, 121 u32 sectsize); 122 static int ocfs2_initialize_super(struct super_block *sb, 123 struct buffer_head *bh, 124 int sector_size); 125 static int ocfs2_get_sector(struct super_block *sb, 126 struct buffer_head **bh, 127 int block, 128 int sect_size); 129 static void ocfs2_write_super(struct super_block *sb); 130 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 131 static void ocfs2_destroy_inode(struct inode *inode); 132 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 133 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 134 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 135 136 static const struct super_operations ocfs2_sops = { 137 .statfs = ocfs2_statfs, 138 .alloc_inode = ocfs2_alloc_inode, 139 .destroy_inode = ocfs2_destroy_inode, 140 .drop_inode = ocfs2_drop_inode, 141 .clear_inode = ocfs2_clear_inode, 142 .delete_inode = ocfs2_delete_inode, 143 .sync_fs = ocfs2_sync_fs, 144 .write_super = ocfs2_write_super, 145 .put_super = ocfs2_put_super, 146 .remount_fs = ocfs2_remount, 147 .show_options = ocfs2_show_options, 148 .quota_read = ocfs2_quota_read, 149 .quota_write = ocfs2_quota_write, 150 }; 151 152 enum { 153 Opt_barrier, 154 Opt_err_panic, 155 Opt_err_ro, 156 Opt_intr, 157 Opt_nointr, 158 Opt_hb_none, 159 Opt_hb_local, 160 Opt_data_ordered, 161 Opt_data_writeback, 162 Opt_atime_quantum, 163 Opt_slot, 164 Opt_commit, 165 Opt_localalloc, 166 Opt_localflocks, 167 Opt_stack, 168 Opt_user_xattr, 169 Opt_nouser_xattr, 170 Opt_inode64, 171 Opt_acl, 172 Opt_noacl, 173 Opt_usrquota, 174 Opt_grpquota, 175 Opt_err, 176 }; 177 178 static const match_table_t tokens = { 179 {Opt_barrier, "barrier=%u"}, 180 {Opt_err_panic, "errors=panic"}, 181 {Opt_err_ro, "errors=remount-ro"}, 182 {Opt_intr, "intr"}, 183 {Opt_nointr, "nointr"}, 184 {Opt_hb_none, OCFS2_HB_NONE}, 185 {Opt_hb_local, OCFS2_HB_LOCAL}, 186 {Opt_data_ordered, "data=ordered"}, 187 {Opt_data_writeback, "data=writeback"}, 188 {Opt_atime_quantum, "atime_quantum=%u"}, 189 {Opt_slot, "preferred_slot=%u"}, 190 {Opt_commit, "commit=%u"}, 191 {Opt_localalloc, "localalloc=%d"}, 192 {Opt_localflocks, "localflocks"}, 193 {Opt_stack, "cluster_stack=%s"}, 194 {Opt_user_xattr, "user_xattr"}, 195 {Opt_nouser_xattr, "nouser_xattr"}, 196 {Opt_inode64, "inode64"}, 197 {Opt_acl, "acl"}, 198 {Opt_noacl, "noacl"}, 199 {Opt_usrquota, "usrquota"}, 200 {Opt_grpquota, "grpquota"}, 201 {Opt_err, NULL} 202 }; 203 204 /* 205 * write_super and sync_fs ripped right out of ext3. 206 */ 207 static void ocfs2_write_super(struct super_block *sb) 208 { 209 if (mutex_trylock(&sb->s_lock) != 0) 210 BUG(); 211 sb->s_dirt = 0; 212 } 213 214 static int ocfs2_sync_fs(struct super_block *sb, int wait) 215 { 216 int status; 217 tid_t target; 218 struct ocfs2_super *osb = OCFS2_SB(sb); 219 220 sb->s_dirt = 0; 221 222 if (ocfs2_is_hard_readonly(osb)) 223 return -EROFS; 224 225 if (wait) { 226 status = ocfs2_flush_truncate_log(osb); 227 if (status < 0) 228 mlog_errno(status); 229 } else { 230 ocfs2_schedule_truncate_log_flush(osb, 0); 231 } 232 233 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 234 &target)) { 235 if (wait) 236 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 237 target); 238 } 239 return 0; 240 } 241 242 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 243 { 244 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 245 && (ino == USER_QUOTA_SYSTEM_INODE 246 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 247 return 0; 248 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 249 && (ino == GROUP_QUOTA_SYSTEM_INODE 250 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 251 return 0; 252 return 1; 253 } 254 255 static int ocfs2_init_global_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 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 264 if (IS_ERR(new)) { 265 status = PTR_ERR(new); 266 mlog_errno(status); 267 goto bail; 268 } 269 osb->root_inode = new; 270 271 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 272 if (IS_ERR(new)) { 273 status = PTR_ERR(new); 274 mlog_errno(status); 275 goto bail; 276 } 277 osb->sys_root_inode = new; 278 279 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 280 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 281 if (!ocfs2_need_system_inode(osb, i)) 282 continue; 283 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 284 if (!new) { 285 ocfs2_release_system_inodes(osb); 286 status = -EINVAL; 287 mlog_errno(status); 288 /* FIXME: Should ERROR_RO_FS */ 289 mlog(ML_ERROR, "Unable to load system inode %d, " 290 "possibly corrupt fs?", i); 291 goto bail; 292 } 293 // the array now has one ref, so drop this one 294 iput(new); 295 } 296 297 bail: 298 mlog_exit(status); 299 return status; 300 } 301 302 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 303 { 304 struct inode *new = NULL; 305 int status = 0; 306 int i; 307 308 mlog_entry_void(); 309 310 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 311 i < NUM_SYSTEM_INODES; 312 i++) { 313 if (!ocfs2_need_system_inode(osb, i)) 314 continue; 315 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 316 if (!new) { 317 ocfs2_release_system_inodes(osb); 318 status = -EINVAL; 319 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 320 status, i, osb->slot_num); 321 goto bail; 322 } 323 /* the array now has one ref, so drop this one */ 324 iput(new); 325 } 326 327 bail: 328 mlog_exit(status); 329 return status; 330 } 331 332 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 333 { 334 int i; 335 struct inode *inode; 336 337 mlog_entry_void(); 338 339 for (i = 0; i < NUM_SYSTEM_INODES; i++) { 340 inode = osb->system_inodes[i]; 341 if (inode) { 342 iput(inode); 343 osb->system_inodes[i] = NULL; 344 } 345 } 346 347 inode = osb->sys_root_inode; 348 if (inode) { 349 iput(inode); 350 osb->sys_root_inode = NULL; 351 } 352 353 inode = osb->root_inode; 354 if (inode) { 355 iput(inode); 356 osb->root_inode = NULL; 357 } 358 359 mlog_exit(0); 360 } 361 362 /* We're allocating fs objects, use GFP_NOFS */ 363 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 364 { 365 struct ocfs2_inode_info *oi; 366 367 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 368 if (!oi) 369 return NULL; 370 371 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 372 return &oi->vfs_inode; 373 } 374 375 static void ocfs2_destroy_inode(struct inode *inode) 376 { 377 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 378 } 379 380 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 381 unsigned int cbits) 382 { 383 unsigned int bytes = 1 << cbits; 384 unsigned int trim = bytes; 385 unsigned int bitshift = 32; 386 387 /* 388 * i_size and all block offsets in ocfs2 are always 64 bits 389 * wide. i_clusters is 32 bits, in cluster-sized units. So on 390 * 64 bit platforms, cluster size will be the limiting factor. 391 */ 392 393 #if BITS_PER_LONG == 32 394 # if defined(CONFIG_LBD) 395 BUILD_BUG_ON(sizeof(sector_t) != 8); 396 /* 397 * We might be limited by page cache size. 398 */ 399 if (bytes > PAGE_CACHE_SIZE) { 400 bytes = PAGE_CACHE_SIZE; 401 trim = 1; 402 /* 403 * Shift by 31 here so that we don't get larger than 404 * MAX_LFS_FILESIZE 405 */ 406 bitshift = 31; 407 } 408 # else 409 /* 410 * We are limited by the size of sector_t. Use block size, as 411 * that's what we expose to the VFS. 412 */ 413 bytes = 1 << bbits; 414 trim = 1; 415 bitshift = 31; 416 # endif 417 #endif 418 419 /* 420 * Trim by a whole cluster when we can actually approach the 421 * on-disk limits. Otherwise we can overflow i_clusters when 422 * an extent start is at the max offset. 423 */ 424 return (((unsigned long long)bytes) << bitshift) - trim; 425 } 426 427 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 428 { 429 int incompat_features; 430 int ret = 0; 431 struct mount_options parsed_options; 432 struct ocfs2_super *osb = OCFS2_SB(sb); 433 434 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { 435 ret = -EINVAL; 436 goto out; 437 } 438 439 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != 440 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 441 ret = -EINVAL; 442 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 443 goto out; 444 } 445 446 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 447 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 448 ret = -EINVAL; 449 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 450 goto out; 451 } 452 453 /* Probably don't want this on remount; it might 454 * mess with other nodes */ 455 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 456 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 457 ret = -EINVAL; 458 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 459 goto out; 460 } 461 462 /* We're going to/from readonly mode. */ 463 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 464 /* Disable quota accounting before remounting RO */ 465 if (*flags & MS_RDONLY) { 466 ret = ocfs2_susp_quotas(osb, 0); 467 if (ret < 0) 468 goto out; 469 } 470 /* Lock here so the check of HARD_RO and the potential 471 * setting of SOFT_RO is atomic. */ 472 spin_lock(&osb->osb_lock); 473 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 474 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 475 ret = -EROFS; 476 goto unlock_osb; 477 } 478 479 if (*flags & MS_RDONLY) { 480 mlog(0, "Going to ro mode.\n"); 481 sb->s_flags |= MS_RDONLY; 482 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 483 } else { 484 mlog(0, "Making ro filesystem writeable.\n"); 485 486 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 487 mlog(ML_ERROR, "Cannot remount RDWR " 488 "filesystem due to previous errors.\n"); 489 ret = -EROFS; 490 goto unlock_osb; 491 } 492 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 493 if (incompat_features) { 494 mlog(ML_ERROR, "Cannot remount RDWR because " 495 "of unsupported optional features " 496 "(%x).\n", incompat_features); 497 ret = -EINVAL; 498 goto unlock_osb; 499 } 500 sb->s_flags &= ~MS_RDONLY; 501 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 502 } 503 unlock_osb: 504 spin_unlock(&osb->osb_lock); 505 /* Enable quota accounting after remounting RW */ 506 if (!ret && !(*flags & MS_RDONLY)) { 507 if (sb_any_quota_suspended(sb)) 508 ret = ocfs2_susp_quotas(osb, 1); 509 else 510 ret = ocfs2_enable_quotas(osb); 511 if (ret < 0) { 512 /* Return back changes... */ 513 spin_lock(&osb->osb_lock); 514 sb->s_flags |= MS_RDONLY; 515 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 516 spin_unlock(&osb->osb_lock); 517 goto out; 518 } 519 } 520 } 521 522 if (!ret) { 523 /* Only save off the new mount options in case of a successful 524 * remount. */ 525 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)) 526 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 527 osb->s_mount_opt = parsed_options.mount_opt; 528 osb->s_atime_quantum = parsed_options.atime_quantum; 529 osb->preferred_slot = parsed_options.slot; 530 if (parsed_options.commit_interval) 531 osb->osb_commit_interval = parsed_options.commit_interval; 532 533 if (!ocfs2_is_hard_readonly(osb)) 534 ocfs2_set_journal_params(osb); 535 } 536 out: 537 return ret; 538 } 539 540 static int ocfs2_sb_probe(struct super_block *sb, 541 struct buffer_head **bh, 542 int *sector_size) 543 { 544 int status, tmpstat; 545 struct ocfs1_vol_disk_hdr *hdr; 546 struct ocfs2_dinode *di; 547 int blksize; 548 549 *bh = NULL; 550 551 /* may be > 512 */ 552 *sector_size = bdev_hardsect_size(sb->s_bdev); 553 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 554 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 555 *sector_size, OCFS2_MAX_BLOCKSIZE); 556 status = -EINVAL; 557 goto bail; 558 } 559 560 /* Can this really happen? */ 561 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 562 *sector_size = OCFS2_MIN_BLOCKSIZE; 563 564 /* check block zero for old format */ 565 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 566 if (status < 0) { 567 mlog_errno(status); 568 goto bail; 569 } 570 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 571 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 572 mlog(ML_ERROR, "incompatible version: %u.%u\n", 573 hdr->major_version, hdr->minor_version); 574 status = -EINVAL; 575 } 576 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 577 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 578 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 579 hdr->signature); 580 status = -EINVAL; 581 } 582 brelse(*bh); 583 *bh = NULL; 584 if (status < 0) { 585 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 586 "upgraded before mounting with ocfs v2\n"); 587 goto bail; 588 } 589 590 /* 591 * Now check at magic offset for 512, 1024, 2048, 4096 592 * blocksizes. 4096 is the maximum blocksize because it is 593 * the minimum clustersize. 594 */ 595 status = -EINVAL; 596 for (blksize = *sector_size; 597 blksize <= OCFS2_MAX_BLOCKSIZE; 598 blksize <<= 1) { 599 tmpstat = ocfs2_get_sector(sb, bh, 600 OCFS2_SUPER_BLOCK_BLKNO, 601 blksize); 602 if (tmpstat < 0) { 603 status = tmpstat; 604 mlog_errno(status); 605 goto bail; 606 } 607 di = (struct ocfs2_dinode *) (*bh)->b_data; 608 status = ocfs2_verify_volume(di, *bh, blksize); 609 if (status >= 0) 610 goto bail; 611 brelse(*bh); 612 *bh = NULL; 613 if (status != -EAGAIN) 614 break; 615 } 616 617 bail: 618 return status; 619 } 620 621 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 622 { 623 if (ocfs2_mount_local(osb)) { 624 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 625 mlog(ML_ERROR, "Cannot heartbeat on a locally " 626 "mounted device.\n"); 627 return -EINVAL; 628 } 629 } 630 631 if (ocfs2_userspace_stack(osb)) { 632 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 633 mlog(ML_ERROR, "Userspace stack expected, but " 634 "o2cb heartbeat arguments passed to mount\n"); 635 return -EINVAL; 636 } 637 } 638 639 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { 640 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 641 !ocfs2_userspace_stack(osb)) { 642 mlog(ML_ERROR, "Heartbeat has to be started to mount " 643 "a read-write clustered device.\n"); 644 return -EINVAL; 645 } 646 } 647 648 return 0; 649 } 650 651 /* 652 * If we're using a userspace stack, mount should have passed 653 * a name that matches the disk. If not, mount should not 654 * have passed a stack. 655 */ 656 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 657 struct mount_options *mopt) 658 { 659 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 660 mlog(ML_ERROR, 661 "cluster stack passed to mount, but this filesystem " 662 "does not support it\n"); 663 return -EINVAL; 664 } 665 666 if (ocfs2_userspace_stack(osb) && 667 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 668 OCFS2_STACK_LABEL_LEN)) { 669 mlog(ML_ERROR, 670 "cluster stack passed to mount (\"%s\") does not " 671 "match the filesystem (\"%s\")\n", 672 mopt->cluster_stack, 673 osb->osb_cluster_stack); 674 return -EINVAL; 675 } 676 677 return 0; 678 } 679 680 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 681 { 682 int type; 683 struct super_block *sb = osb->sb; 684 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 685 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 686 int status = 0; 687 688 for (type = 0; type < MAXQUOTAS; type++) { 689 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 690 continue; 691 if (unsuspend) 692 status = vfs_quota_enable( 693 sb_dqopt(sb)->files[type], 694 type, QFMT_OCFS2, 695 DQUOT_SUSPENDED); 696 else 697 status = vfs_quota_disable(sb, type, 698 DQUOT_SUSPENDED); 699 if (status < 0) 700 break; 701 } 702 if (status < 0) 703 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 704 "remount (error = %d).\n", status); 705 return status; 706 } 707 708 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 709 { 710 struct inode *inode[MAXQUOTAS] = { NULL, NULL }; 711 struct super_block *sb = osb->sb; 712 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 713 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 714 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, 715 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 716 int status; 717 int type; 718 719 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 720 for (type = 0; type < MAXQUOTAS; type++) { 721 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 722 continue; 723 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 724 osb->slot_num); 725 if (!inode[type]) { 726 status = -ENOENT; 727 goto out_quota_off; 728 } 729 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2, 730 DQUOT_USAGE_ENABLED); 731 if (status < 0) 732 goto out_quota_off; 733 } 734 735 for (type = 0; type < MAXQUOTAS; type++) 736 iput(inode[type]); 737 return 0; 738 out_quota_off: 739 ocfs2_disable_quotas(osb); 740 for (type = 0; type < MAXQUOTAS; type++) 741 iput(inode[type]); 742 mlog_errno(status); 743 return status; 744 } 745 746 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 747 { 748 int type; 749 struct inode *inode; 750 struct super_block *sb = osb->sb; 751 752 /* We mostly ignore errors in this function because there's not much 753 * we can do when we see them */ 754 for (type = 0; type < MAXQUOTAS; type++) { 755 if (!sb_has_quota_loaded(sb, type)) 756 continue; 757 inode = igrab(sb->s_dquot.files[type]); 758 /* Turn off quotas. This will remove all dquot structures from 759 * memory and so they will be automatically synced to global 760 * quota files */ 761 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED | 762 DQUOT_LIMITS_ENABLED); 763 if (!inode) 764 continue; 765 iput(inode); 766 } 767 } 768 769 /* Handle quota on quotactl */ 770 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id, 771 char *path, int remount) 772 { 773 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 774 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 775 776 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 777 return -EINVAL; 778 779 if (remount) 780 return 0; /* Just ignore it has been handled in 781 * ocfs2_remount() */ 782 return vfs_quota_enable(sb_dqopt(sb)->files[type], type, 783 format_id, DQUOT_LIMITS_ENABLED); 784 } 785 786 /* Handle quota off quotactl */ 787 static int ocfs2_quota_off(struct super_block *sb, int type, int remount) 788 { 789 if (remount) 790 return 0; /* Ignore now and handle later in 791 * ocfs2_remount() */ 792 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED); 793 } 794 795 static struct quotactl_ops ocfs2_quotactl_ops = { 796 .quota_on = ocfs2_quota_on, 797 .quota_off = ocfs2_quota_off, 798 .quota_sync = vfs_quota_sync, 799 .get_info = vfs_get_dqinfo, 800 .set_info = vfs_set_dqinfo, 801 .get_dqblk = vfs_get_dqblk, 802 .set_dqblk = vfs_set_dqblk, 803 }; 804 805 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 806 { 807 struct dentry *root; 808 int status, sector_size; 809 struct mount_options parsed_options; 810 struct inode *inode = NULL; 811 struct ocfs2_super *osb = NULL; 812 struct buffer_head *bh = NULL; 813 char nodestr[8]; 814 815 mlog_entry("%p, %p, %i", sb, data, silent); 816 817 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 818 status = -EINVAL; 819 goto read_super_error; 820 } 821 822 /* probe for superblock */ 823 status = ocfs2_sb_probe(sb, &bh, §or_size); 824 if (status < 0) { 825 mlog(ML_ERROR, "superblock probe failed!\n"); 826 goto read_super_error; 827 } 828 829 status = ocfs2_initialize_super(sb, bh, sector_size); 830 osb = OCFS2_SB(sb); 831 if (status < 0) { 832 mlog_errno(status); 833 goto read_super_error; 834 } 835 brelse(bh); 836 bh = NULL; 837 838 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)) 839 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 840 841 osb->s_mount_opt = parsed_options.mount_opt; 842 osb->s_atime_quantum = parsed_options.atime_quantum; 843 osb->preferred_slot = parsed_options.slot; 844 osb->osb_commit_interval = parsed_options.commit_interval; 845 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt); 846 osb->local_alloc_bits = osb->local_alloc_default_bits; 847 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA && 848 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 849 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 850 status = -EINVAL; 851 mlog(ML_ERROR, "User quotas were requested, but this " 852 "filesystem does not have the feature enabled.\n"); 853 goto read_super_error; 854 } 855 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA && 856 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 857 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 858 status = -EINVAL; 859 mlog(ML_ERROR, "Group quotas were requested, but this " 860 "filesystem does not have the feature enabled.\n"); 861 goto read_super_error; 862 } 863 864 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 865 if (status) 866 goto read_super_error; 867 868 sb->s_magic = OCFS2_SUPER_MAGIC; 869 870 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 871 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 872 873 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 874 * heartbeat=none */ 875 if (bdev_read_only(sb->s_bdev)) { 876 if (!(sb->s_flags & MS_RDONLY)) { 877 status = -EACCES; 878 mlog(ML_ERROR, "Readonly device detected but readonly " 879 "mount was not specified.\n"); 880 goto read_super_error; 881 } 882 883 /* You should not be able to start a local heartbeat 884 * on a readonly device. */ 885 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 886 status = -EROFS; 887 mlog(ML_ERROR, "Local heartbeat specified on readonly " 888 "device.\n"); 889 goto read_super_error; 890 } 891 892 status = ocfs2_check_journals_nolocks(osb); 893 if (status < 0) { 894 if (status == -EROFS) 895 mlog(ML_ERROR, "Recovery required on readonly " 896 "file system, but write access is " 897 "unavailable.\n"); 898 else 899 mlog_errno(status); 900 goto read_super_error; 901 } 902 903 ocfs2_set_ro_flag(osb, 1); 904 905 printk(KERN_NOTICE "Readonly device detected. No cluster " 906 "services will be utilized for this mount. Recovery " 907 "will be skipped.\n"); 908 } 909 910 if (!ocfs2_is_hard_readonly(osb)) { 911 if (sb->s_flags & MS_RDONLY) 912 ocfs2_set_ro_flag(osb, 0); 913 } 914 915 status = ocfs2_verify_heartbeat(osb); 916 if (status < 0) { 917 mlog_errno(status); 918 goto read_super_error; 919 } 920 921 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 922 ocfs2_debugfs_root); 923 if (!osb->osb_debug_root) { 924 status = -EINVAL; 925 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 926 goto read_super_error; 927 } 928 929 status = ocfs2_mount_volume(sb); 930 if (osb->root_inode) 931 inode = igrab(osb->root_inode); 932 933 if (status < 0) 934 goto read_super_error; 935 936 if (!inode) { 937 status = -EIO; 938 mlog_errno(status); 939 goto read_super_error; 940 } 941 942 root = d_alloc_root(inode); 943 if (!root) { 944 status = -ENOMEM; 945 mlog_errno(status); 946 goto read_super_error; 947 } 948 949 sb->s_root = root; 950 951 ocfs2_complete_mount_recovery(osb); 952 953 if (ocfs2_mount_local(osb)) 954 snprintf(nodestr, sizeof(nodestr), "local"); 955 else 956 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 957 958 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 959 "with %s data mode.\n", 960 osb->dev_str, nodestr, osb->slot_num, 961 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 962 "ordered"); 963 964 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 965 wake_up(&osb->osb_mount_event); 966 967 /* Now we can initialize quotas because we can afford to wait 968 * for cluster locks recovery now. That also means that truncation 969 * log recovery can happen but that waits for proper quota setup */ 970 if (!(sb->s_flags & MS_RDONLY)) { 971 status = ocfs2_enable_quotas(osb); 972 if (status < 0) { 973 /* We have to err-out specially here because 974 * s_root is already set */ 975 mlog_errno(status); 976 atomic_set(&osb->vol_state, VOLUME_DISABLED); 977 wake_up(&osb->osb_mount_event); 978 mlog_exit(status); 979 return status; 980 } 981 } 982 983 ocfs2_complete_quota_recovery(osb); 984 985 /* Now we wake up again for processes waiting for quotas */ 986 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 987 wake_up(&osb->osb_mount_event); 988 989 mlog_exit(status); 990 return status; 991 992 read_super_error: 993 brelse(bh); 994 995 if (inode) 996 iput(inode); 997 998 if (osb) { 999 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1000 wake_up(&osb->osb_mount_event); 1001 ocfs2_dismount_volume(sb, 1); 1002 } 1003 1004 mlog_exit(status); 1005 return status; 1006 } 1007 1008 static int ocfs2_get_sb(struct file_system_type *fs_type, 1009 int flags, 1010 const char *dev_name, 1011 void *data, 1012 struct vfsmount *mnt) 1013 { 1014 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, 1015 mnt); 1016 } 1017 1018 static struct file_system_type ocfs2_fs_type = { 1019 .owner = THIS_MODULE, 1020 .name = "ocfs2", 1021 .get_sb = ocfs2_get_sb, /* is this called when we mount 1022 * the fs? */ 1023 .kill_sb = kill_block_super, /* set to the generic one 1024 * right now, but do we 1025 * need to change that? */ 1026 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1027 .next = NULL 1028 }; 1029 1030 static int ocfs2_parse_options(struct super_block *sb, 1031 char *options, 1032 struct mount_options *mopt, 1033 int is_remount) 1034 { 1035 int status; 1036 char *p; 1037 1038 mlog_entry("remount: %d, options: \"%s\"\n", is_remount, 1039 options ? options : "(none)"); 1040 1041 mopt->commit_interval = 0; 1042 mopt->mount_opt = 0; 1043 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1044 mopt->slot = OCFS2_INVALID_SLOT; 1045 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE; 1046 mopt->cluster_stack[0] = '\0'; 1047 1048 if (!options) { 1049 status = 1; 1050 goto bail; 1051 } 1052 1053 while ((p = strsep(&options, ",")) != NULL) { 1054 int token, option; 1055 substring_t args[MAX_OPT_ARGS]; 1056 1057 if (!*p) 1058 continue; 1059 1060 token = match_token(p, tokens, args); 1061 switch (token) { 1062 case Opt_hb_local: 1063 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1064 break; 1065 case Opt_hb_none: 1066 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; 1067 break; 1068 case Opt_barrier: 1069 if (match_int(&args[0], &option)) { 1070 status = 0; 1071 goto bail; 1072 } 1073 if (option) 1074 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1075 else 1076 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1077 break; 1078 case Opt_intr: 1079 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1080 break; 1081 case Opt_nointr: 1082 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1083 break; 1084 case Opt_err_panic: 1085 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1086 break; 1087 case Opt_err_ro: 1088 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1089 break; 1090 case Opt_data_ordered: 1091 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1092 break; 1093 case Opt_data_writeback: 1094 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1095 break; 1096 case Opt_user_xattr: 1097 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1098 break; 1099 case Opt_nouser_xattr: 1100 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1101 break; 1102 case Opt_atime_quantum: 1103 if (match_int(&args[0], &option)) { 1104 status = 0; 1105 goto bail; 1106 } 1107 if (option >= 0) 1108 mopt->atime_quantum = option; 1109 break; 1110 case Opt_slot: 1111 option = 0; 1112 if (match_int(&args[0], &option)) { 1113 status = 0; 1114 goto bail; 1115 } 1116 if (option) 1117 mopt->slot = (s16)option; 1118 break; 1119 case Opt_commit: 1120 option = 0; 1121 if (match_int(&args[0], &option)) { 1122 status = 0; 1123 goto bail; 1124 } 1125 if (option < 0) 1126 return 0; 1127 if (option == 0) 1128 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1129 mopt->commit_interval = HZ * option; 1130 break; 1131 case Opt_localalloc: 1132 option = 0; 1133 if (match_int(&args[0], &option)) { 1134 status = 0; 1135 goto bail; 1136 } 1137 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8)) 1138 mopt->localalloc_opt = option; 1139 break; 1140 case Opt_localflocks: 1141 /* 1142 * Changing this during remount could race 1143 * flock() requests, or "unbalance" existing 1144 * ones (e.g., a lock is taken in one mode but 1145 * dropped in the other). If users care enough 1146 * to flip locking modes during remount, we 1147 * could add a "local" flag to individual 1148 * flock structures for proper tracking of 1149 * state. 1150 */ 1151 if (!is_remount) 1152 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1153 break; 1154 case Opt_stack: 1155 /* Check both that the option we were passed 1156 * is of the right length and that it is a proper 1157 * string of the right length. 1158 */ 1159 if (((args[0].to - args[0].from) != 1160 OCFS2_STACK_LABEL_LEN) || 1161 (strnlen(args[0].from, 1162 OCFS2_STACK_LABEL_LEN) != 1163 OCFS2_STACK_LABEL_LEN)) { 1164 mlog(ML_ERROR, 1165 "Invalid cluster_stack option\n"); 1166 status = 0; 1167 goto bail; 1168 } 1169 memcpy(mopt->cluster_stack, args[0].from, 1170 OCFS2_STACK_LABEL_LEN); 1171 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1172 break; 1173 case Opt_inode64: 1174 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1175 break; 1176 case Opt_usrquota: 1177 /* We check only on remount, otherwise features 1178 * aren't yet initialized. */ 1179 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1180 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1181 mlog(ML_ERROR, "User quota requested but " 1182 "filesystem feature is not set\n"); 1183 status = 0; 1184 goto bail; 1185 } 1186 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1187 break; 1188 case Opt_grpquota: 1189 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1190 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1191 mlog(ML_ERROR, "Group quota requested but " 1192 "filesystem feature is not set\n"); 1193 status = 0; 1194 goto bail; 1195 } 1196 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1197 break; 1198 #ifdef CONFIG_OCFS2_FS_POSIX_ACL 1199 case Opt_acl: 1200 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1201 break; 1202 case Opt_noacl: 1203 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1204 break; 1205 #else 1206 case Opt_acl: 1207 case Opt_noacl: 1208 printk(KERN_INFO "ocfs2 (no)acl options not supported\n"); 1209 break; 1210 #endif 1211 default: 1212 mlog(ML_ERROR, 1213 "Unrecognized mount option \"%s\" " 1214 "or missing value\n", p); 1215 status = 0; 1216 goto bail; 1217 } 1218 } 1219 1220 status = 1; 1221 1222 bail: 1223 mlog_exit(status); 1224 return status; 1225 } 1226 1227 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 1228 { 1229 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb); 1230 unsigned long opts = osb->s_mount_opt; 1231 unsigned int local_alloc_megs; 1232 1233 if (opts & OCFS2_MOUNT_HB_LOCAL) 1234 seq_printf(s, ",_netdev,heartbeat=local"); 1235 else 1236 seq_printf(s, ",heartbeat=none"); 1237 1238 if (opts & OCFS2_MOUNT_NOINTR) 1239 seq_printf(s, ",nointr"); 1240 1241 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1242 seq_printf(s, ",data=writeback"); 1243 else 1244 seq_printf(s, ",data=ordered"); 1245 1246 if (opts & OCFS2_MOUNT_BARRIER) 1247 seq_printf(s, ",barrier=1"); 1248 1249 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1250 seq_printf(s, ",errors=panic"); 1251 else 1252 seq_printf(s, ",errors=remount-ro"); 1253 1254 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1255 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1256 1257 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM) 1258 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1259 1260 if (osb->osb_commit_interval) 1261 seq_printf(s, ",commit=%u", 1262 (unsigned) (osb->osb_commit_interval / HZ)); 1263 1264 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1265 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE) 1266 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1267 1268 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1269 seq_printf(s, ",localflocks,"); 1270 1271 if (osb->osb_cluster_stack[0]) 1272 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1273 osb->osb_cluster_stack); 1274 if (opts & OCFS2_MOUNT_USRQUOTA) 1275 seq_printf(s, ",usrquota"); 1276 if (opts & OCFS2_MOUNT_GRPQUOTA) 1277 seq_printf(s, ",grpquota"); 1278 1279 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1280 seq_printf(s, ",nouser_xattr"); 1281 else 1282 seq_printf(s, ",user_xattr"); 1283 1284 if (opts & OCFS2_MOUNT_INODE64) 1285 seq_printf(s, ",inode64"); 1286 1287 #ifdef CONFIG_OCFS2_FS_POSIX_ACL 1288 if (opts & OCFS2_MOUNT_POSIX_ACL) 1289 seq_printf(s, ",acl"); 1290 else 1291 seq_printf(s, ",noacl"); 1292 #endif 1293 1294 return 0; 1295 } 1296 1297 static int __init ocfs2_init(void) 1298 { 1299 int status; 1300 1301 mlog_entry_void(); 1302 1303 ocfs2_print_version(); 1304 1305 status = init_ocfs2_uptodate_cache(); 1306 if (status < 0) { 1307 mlog_errno(status); 1308 goto leave; 1309 } 1310 1311 status = ocfs2_initialize_mem_caches(); 1312 if (status < 0) { 1313 mlog_errno(status); 1314 goto leave; 1315 } 1316 1317 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1318 if (!ocfs2_wq) { 1319 status = -ENOMEM; 1320 goto leave; 1321 } 1322 1323 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1324 if (!ocfs2_debugfs_root) { 1325 status = -EFAULT; 1326 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1327 } 1328 1329 status = ocfs2_quota_setup(); 1330 if (status) 1331 goto leave; 1332 1333 ocfs2_set_locking_protocol(); 1334 1335 status = register_quota_format(&ocfs2_quota_format); 1336 leave: 1337 if (status < 0) { 1338 ocfs2_quota_shutdown(); 1339 ocfs2_free_mem_caches(); 1340 exit_ocfs2_uptodate_cache(); 1341 } 1342 1343 mlog_exit(status); 1344 1345 if (status >= 0) { 1346 return register_filesystem(&ocfs2_fs_type); 1347 } else 1348 return -1; 1349 } 1350 1351 static void __exit ocfs2_exit(void) 1352 { 1353 mlog_entry_void(); 1354 1355 ocfs2_quota_shutdown(); 1356 1357 if (ocfs2_wq) { 1358 flush_workqueue(ocfs2_wq); 1359 destroy_workqueue(ocfs2_wq); 1360 } 1361 1362 unregister_quota_format(&ocfs2_quota_format); 1363 1364 debugfs_remove(ocfs2_debugfs_root); 1365 1366 ocfs2_free_mem_caches(); 1367 1368 unregister_filesystem(&ocfs2_fs_type); 1369 1370 exit_ocfs2_uptodate_cache(); 1371 1372 mlog_exit_void(); 1373 } 1374 1375 static void ocfs2_put_super(struct super_block *sb) 1376 { 1377 mlog_entry("(0x%p)\n", sb); 1378 1379 ocfs2_sync_blockdev(sb); 1380 ocfs2_dismount_volume(sb, 0); 1381 1382 mlog_exit_void(); 1383 } 1384 1385 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1386 { 1387 struct ocfs2_super *osb; 1388 u32 numbits, freebits; 1389 int status; 1390 struct ocfs2_dinode *bm_lock; 1391 struct buffer_head *bh = NULL; 1392 struct inode *inode = NULL; 1393 1394 mlog_entry("(%p, %p)\n", dentry->d_sb, buf); 1395 1396 osb = OCFS2_SB(dentry->d_sb); 1397 1398 inode = ocfs2_get_system_file_inode(osb, 1399 GLOBAL_BITMAP_SYSTEM_INODE, 1400 OCFS2_INVALID_SLOT); 1401 if (!inode) { 1402 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1403 status = -EIO; 1404 goto bail; 1405 } 1406 1407 status = ocfs2_inode_lock(inode, &bh, 0); 1408 if (status < 0) { 1409 mlog_errno(status); 1410 goto bail; 1411 } 1412 1413 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1414 1415 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1416 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1417 1418 buf->f_type = OCFS2_SUPER_MAGIC; 1419 buf->f_bsize = dentry->d_sb->s_blocksize; 1420 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1421 buf->f_blocks = ((sector_t) numbits) * 1422 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1423 buf->f_bfree = ((sector_t) freebits) * 1424 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1425 buf->f_bavail = buf->f_bfree; 1426 buf->f_files = numbits; 1427 buf->f_ffree = freebits; 1428 1429 brelse(bh); 1430 1431 ocfs2_inode_unlock(inode, 0); 1432 status = 0; 1433 bail: 1434 if (inode) 1435 iput(inode); 1436 1437 mlog_exit(status); 1438 1439 return status; 1440 } 1441 1442 static void ocfs2_inode_init_once(void *data) 1443 { 1444 struct ocfs2_inode_info *oi = data; 1445 1446 oi->ip_flags = 0; 1447 oi->ip_open_count = 0; 1448 spin_lock_init(&oi->ip_lock); 1449 ocfs2_extent_map_init(&oi->vfs_inode); 1450 INIT_LIST_HEAD(&oi->ip_io_markers); 1451 oi->ip_created_trans = 0; 1452 oi->ip_last_trans = 0; 1453 oi->ip_dir_start_lookup = 0; 1454 1455 init_rwsem(&oi->ip_alloc_sem); 1456 init_rwsem(&oi->ip_xattr_sem); 1457 mutex_init(&oi->ip_io_mutex); 1458 1459 oi->ip_blkno = 0ULL; 1460 oi->ip_clusters = 0; 1461 1462 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1463 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1464 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1465 1466 ocfs2_metadata_cache_init(&oi->vfs_inode); 1467 1468 inode_init_once(&oi->vfs_inode); 1469 } 1470 1471 static int ocfs2_initialize_mem_caches(void) 1472 { 1473 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1474 sizeof(struct ocfs2_inode_info), 1475 0, 1476 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1477 SLAB_MEM_SPREAD), 1478 ocfs2_inode_init_once); 1479 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1480 sizeof(struct ocfs2_dquot), 1481 0, 1482 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1483 SLAB_MEM_SPREAD), 1484 NULL); 1485 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1486 sizeof(struct ocfs2_quota_chunk), 1487 0, 1488 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1489 NULL); 1490 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1491 !ocfs2_qf_chunk_cachep) { 1492 if (ocfs2_inode_cachep) 1493 kmem_cache_destroy(ocfs2_inode_cachep); 1494 if (ocfs2_dquot_cachep) 1495 kmem_cache_destroy(ocfs2_dquot_cachep); 1496 if (ocfs2_qf_chunk_cachep) 1497 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1498 return -ENOMEM; 1499 } 1500 1501 return 0; 1502 } 1503 1504 static void ocfs2_free_mem_caches(void) 1505 { 1506 if (ocfs2_inode_cachep) 1507 kmem_cache_destroy(ocfs2_inode_cachep); 1508 ocfs2_inode_cachep = NULL; 1509 1510 if (ocfs2_dquot_cachep) 1511 kmem_cache_destroy(ocfs2_dquot_cachep); 1512 ocfs2_dquot_cachep = NULL; 1513 1514 if (ocfs2_qf_chunk_cachep) 1515 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1516 ocfs2_qf_chunk_cachep = NULL; 1517 } 1518 1519 static int ocfs2_get_sector(struct super_block *sb, 1520 struct buffer_head **bh, 1521 int block, 1522 int sect_size) 1523 { 1524 if (!sb_set_blocksize(sb, sect_size)) { 1525 mlog(ML_ERROR, "unable to set blocksize\n"); 1526 return -EIO; 1527 } 1528 1529 *bh = sb_getblk(sb, block); 1530 if (!*bh) { 1531 mlog_errno(-EIO); 1532 return -EIO; 1533 } 1534 lock_buffer(*bh); 1535 if (!buffer_dirty(*bh)) 1536 clear_buffer_uptodate(*bh); 1537 unlock_buffer(*bh); 1538 ll_rw_block(READ, 1, bh); 1539 wait_on_buffer(*bh); 1540 if (!buffer_uptodate(*bh)) { 1541 mlog_errno(-EIO); 1542 brelse(*bh); 1543 *bh = NULL; 1544 return -EIO; 1545 } 1546 1547 return 0; 1548 } 1549 1550 static int ocfs2_mount_volume(struct super_block *sb) 1551 { 1552 int status = 0; 1553 int unlock_super = 0; 1554 struct ocfs2_super *osb = OCFS2_SB(sb); 1555 1556 mlog_entry_void(); 1557 1558 if (ocfs2_is_hard_readonly(osb)) 1559 goto leave; 1560 1561 status = ocfs2_dlm_init(osb); 1562 if (status < 0) { 1563 mlog_errno(status); 1564 goto leave; 1565 } 1566 1567 status = ocfs2_super_lock(osb, 1); 1568 if (status < 0) { 1569 mlog_errno(status); 1570 goto leave; 1571 } 1572 unlock_super = 1; 1573 1574 /* This will load up the node map and add ourselves to it. */ 1575 status = ocfs2_find_slot(osb); 1576 if (status < 0) { 1577 mlog_errno(status); 1578 goto leave; 1579 } 1580 1581 /* load all node-local system inodes */ 1582 status = ocfs2_init_local_system_inodes(osb); 1583 if (status < 0) { 1584 mlog_errno(status); 1585 goto leave; 1586 } 1587 1588 status = ocfs2_check_volume(osb); 1589 if (status < 0) { 1590 mlog_errno(status); 1591 goto leave; 1592 } 1593 1594 status = ocfs2_truncate_log_init(osb); 1595 if (status < 0) { 1596 mlog_errno(status); 1597 goto leave; 1598 } 1599 1600 if (ocfs2_mount_local(osb)) 1601 goto leave; 1602 1603 leave: 1604 if (unlock_super) 1605 ocfs2_super_unlock(osb, 1); 1606 1607 mlog_exit(status); 1608 return status; 1609 } 1610 1611 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1612 { 1613 int tmp, hangup_needed = 0; 1614 struct ocfs2_super *osb = NULL; 1615 char nodestr[8]; 1616 1617 mlog_entry("(0x%p)\n", sb); 1618 1619 BUG_ON(!sb); 1620 osb = OCFS2_SB(sb); 1621 BUG_ON(!osb); 1622 1623 ocfs2_disable_quotas(osb); 1624 1625 ocfs2_shutdown_local_alloc(osb); 1626 1627 ocfs2_truncate_log_shutdown(osb); 1628 1629 /* This will disable recovery and flush any recovery work. */ 1630 ocfs2_recovery_exit(osb); 1631 1632 ocfs2_journal_shutdown(osb); 1633 1634 ocfs2_sync_blockdev(sb); 1635 1636 /* No cluster connection means we've failed during mount, so skip 1637 * all the steps which depended on that to complete. */ 1638 if (osb->cconn) { 1639 tmp = ocfs2_super_lock(osb, 1); 1640 if (tmp < 0) { 1641 mlog_errno(tmp); 1642 return; 1643 } 1644 } 1645 1646 if (osb->slot_num != OCFS2_INVALID_SLOT) 1647 ocfs2_put_slot(osb); 1648 1649 if (osb->cconn) 1650 ocfs2_super_unlock(osb, 1); 1651 1652 ocfs2_release_system_inodes(osb); 1653 1654 /* 1655 * If we're dismounting due to mount error, mount.ocfs2 will clean 1656 * up heartbeat. If we're a local mount, there is no heartbeat. 1657 * If we failed before we got a uuid_str yet, we can't stop 1658 * heartbeat. Otherwise, do it. 1659 */ 1660 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str) 1661 hangup_needed = 1; 1662 1663 if (osb->cconn) 1664 ocfs2_dlm_shutdown(osb, hangup_needed); 1665 1666 debugfs_remove(osb->osb_debug_root); 1667 1668 if (hangup_needed) 1669 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1670 1671 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1672 1673 if (ocfs2_mount_local(osb)) 1674 snprintf(nodestr, sizeof(nodestr), "local"); 1675 else 1676 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1677 1678 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1679 osb->dev_str, nodestr); 1680 1681 ocfs2_delete_osb(osb); 1682 kfree(osb); 1683 sb->s_dev = 0; 1684 sb->s_fs_info = NULL; 1685 } 1686 1687 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1688 unsigned uuid_bytes) 1689 { 1690 int i, ret; 1691 char *ptr; 1692 1693 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1694 1695 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1696 if (osb->uuid_str == NULL) 1697 return -ENOMEM; 1698 1699 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1700 /* print with null */ 1701 ret = snprintf(ptr, 3, "%02X", uuid[i]); 1702 if (ret != 2) /* drop super cleans up */ 1703 return -EINVAL; 1704 /* then only advance past the last char */ 1705 ptr += 2; 1706 } 1707 1708 return 0; 1709 } 1710 1711 static int ocfs2_initialize_super(struct super_block *sb, 1712 struct buffer_head *bh, 1713 int sector_size) 1714 { 1715 int status; 1716 int i, cbits, bbits; 1717 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 1718 struct inode *inode = NULL; 1719 struct ocfs2_journal *journal; 1720 __le32 uuid_net_key; 1721 struct ocfs2_super *osb; 1722 1723 mlog_entry_void(); 1724 1725 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 1726 if (!osb) { 1727 status = -ENOMEM; 1728 mlog_errno(status); 1729 goto bail; 1730 } 1731 1732 sb->s_fs_info = osb; 1733 sb->s_op = &ocfs2_sops; 1734 sb->s_export_op = &ocfs2_export_ops; 1735 sb->s_qcop = &ocfs2_quotactl_ops; 1736 sb->dq_op = &ocfs2_quota_operations; 1737 sb->s_xattr = ocfs2_xattr_handlers; 1738 sb->s_time_gran = 1; 1739 sb->s_flags |= MS_NOATIME; 1740 /* this is needed to support O_LARGEFILE */ 1741 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1742 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 1743 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 1744 1745 osb->sb = sb; 1746 /* Save off for ocfs2_rw_direct */ 1747 osb->s_sectsize_bits = blksize_bits(sector_size); 1748 BUG_ON(!osb->s_sectsize_bits); 1749 1750 spin_lock_init(&osb->dc_task_lock); 1751 init_waitqueue_head(&osb->dc_event); 1752 osb->dc_work_sequence = 0; 1753 osb->dc_wake_sequence = 0; 1754 INIT_LIST_HEAD(&osb->blocked_lock_list); 1755 osb->blocked_lock_count = 0; 1756 spin_lock_init(&osb->osb_lock); 1757 spin_lock_init(&osb->osb_xattr_lock); 1758 ocfs2_init_inode_steal_slot(osb); 1759 1760 atomic_set(&osb->alloc_stats.moves, 0); 1761 atomic_set(&osb->alloc_stats.local_data, 0); 1762 atomic_set(&osb->alloc_stats.bitmap_data, 0); 1763 atomic_set(&osb->alloc_stats.bg_allocs, 0); 1764 atomic_set(&osb->alloc_stats.bg_extends, 0); 1765 1766 ocfs2_init_node_maps(osb); 1767 1768 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 1769 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 1770 1771 status = ocfs2_recovery_init(osb); 1772 if (status) { 1773 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 1774 mlog_errno(status); 1775 goto bail; 1776 } 1777 1778 init_waitqueue_head(&osb->checkpoint_event); 1779 atomic_set(&osb->needs_checkpoint, 0); 1780 1781 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1782 1783 osb->slot_num = OCFS2_INVALID_SLOT; 1784 1785 osb->s_xattr_inline_size = le16_to_cpu( 1786 di->id2.i_super.s_xattr_inline_size); 1787 1788 osb->local_alloc_state = OCFS2_LA_UNUSED; 1789 osb->local_alloc_bh = NULL; 1790 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 1791 1792 init_waitqueue_head(&osb->osb_mount_event); 1793 1794 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 1795 if (!osb->vol_label) { 1796 mlog(ML_ERROR, "unable to alloc vol label\n"); 1797 status = -ENOMEM; 1798 goto bail; 1799 } 1800 1801 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 1802 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 1803 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 1804 osb->max_slots); 1805 status = -EINVAL; 1806 goto bail; 1807 } 1808 mlog(0, "max_slots for this device: %u\n", osb->max_slots); 1809 1810 osb->slot_recovery_generations = 1811 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 1812 GFP_KERNEL); 1813 if (!osb->slot_recovery_generations) { 1814 status = -ENOMEM; 1815 mlog_errno(status); 1816 goto bail; 1817 } 1818 1819 init_waitqueue_head(&osb->osb_wipe_event); 1820 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 1821 sizeof(*osb->osb_orphan_wipes), 1822 GFP_KERNEL); 1823 if (!osb->osb_orphan_wipes) { 1824 status = -ENOMEM; 1825 mlog_errno(status); 1826 goto bail; 1827 } 1828 1829 osb->s_feature_compat = 1830 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 1831 osb->s_feature_ro_compat = 1832 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 1833 osb->s_feature_incompat = 1834 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 1835 1836 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 1837 mlog(ML_ERROR, "couldn't mount because of unsupported " 1838 "optional features (%x).\n", i); 1839 status = -EINVAL; 1840 goto bail; 1841 } 1842 if (!(osb->sb->s_flags & MS_RDONLY) && 1843 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 1844 mlog(ML_ERROR, "couldn't mount RDWR because of " 1845 "unsupported optional features (%x).\n", i); 1846 status = -EINVAL; 1847 goto bail; 1848 } 1849 1850 if (ocfs2_userspace_stack(osb)) { 1851 memcpy(osb->osb_cluster_stack, 1852 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 1853 OCFS2_STACK_LABEL_LEN); 1854 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1855 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 1856 mlog(ML_ERROR, 1857 "couldn't mount because of an invalid " 1858 "cluster stack label (%s) \n", 1859 osb->osb_cluster_stack); 1860 status = -EINVAL; 1861 goto bail; 1862 } 1863 } else { 1864 /* The empty string is identical with classic tools that 1865 * don't know about s_cluster_info. */ 1866 osb->osb_cluster_stack[0] = '\0'; 1867 } 1868 1869 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 1870 1871 /* FIXME 1872 * This should be done in ocfs2_journal_init(), but unknown 1873 * ordering issues will cause the filesystem to crash. 1874 * If anyone wants to figure out what part of the code 1875 * refers to osb->journal before ocfs2_journal_init() is run, 1876 * be my guest. 1877 */ 1878 /* initialize our journal structure */ 1879 1880 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 1881 if (!journal) { 1882 mlog(ML_ERROR, "unable to alloc journal\n"); 1883 status = -ENOMEM; 1884 goto bail; 1885 } 1886 osb->journal = journal; 1887 journal->j_osb = osb; 1888 1889 atomic_set(&journal->j_num_trans, 0); 1890 init_rwsem(&journal->j_trans_barrier); 1891 init_waitqueue_head(&journal->j_checkpointed); 1892 spin_lock_init(&journal->j_lock); 1893 journal->j_trans_id = (unsigned long) 1; 1894 INIT_LIST_HEAD(&journal->j_la_cleanups); 1895 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 1896 journal->j_state = OCFS2_JOURNAL_FREE; 1897 1898 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes); 1899 osb->dentry_lock_list = NULL; 1900 1901 /* get some pseudo constants for clustersize bits */ 1902 osb->s_clustersize_bits = 1903 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 1904 osb->s_clustersize = 1 << osb->s_clustersize_bits; 1905 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); 1906 1907 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 1908 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 1909 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 1910 osb->s_clustersize); 1911 status = -EINVAL; 1912 goto bail; 1913 } 1914 1915 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) 1916 > (u32)~0UL) { 1917 mlog(ML_ERROR, "Volume might try to write to blocks beyond " 1918 "what jbd can address in 32 bits.\n"); 1919 status = -EINVAL; 1920 goto bail; 1921 } 1922 1923 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 1924 sizeof(di->id2.i_super.s_uuid))) { 1925 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 1926 status = -ENOMEM; 1927 goto bail; 1928 } 1929 1930 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); 1931 1932 strncpy(osb->vol_label, di->id2.i_super.s_label, 63); 1933 osb->vol_label[63] = '\0'; 1934 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 1935 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 1936 osb->first_cluster_group_blkno = 1937 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 1938 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 1939 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 1940 mlog(0, "vol_label: %s\n", osb->vol_label); 1941 mlog(0, "uuid: %s\n", osb->uuid_str); 1942 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", 1943 (unsigned long long)osb->root_blkno, 1944 (unsigned long long)osb->system_dir_blkno); 1945 1946 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 1947 if (!osb->osb_dlm_debug) { 1948 status = -ENOMEM; 1949 mlog_errno(status); 1950 goto bail; 1951 } 1952 1953 atomic_set(&osb->vol_state, VOLUME_INIT); 1954 1955 /* load root, system_dir, and all global system inodes */ 1956 status = ocfs2_init_global_system_inodes(osb); 1957 if (status < 0) { 1958 mlog_errno(status); 1959 goto bail; 1960 } 1961 1962 /* 1963 * global bitmap 1964 */ 1965 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 1966 OCFS2_INVALID_SLOT); 1967 if (!inode) { 1968 status = -EINVAL; 1969 mlog_errno(status); 1970 goto bail; 1971 } 1972 1973 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 1974 iput(inode); 1975 1976 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8; 1977 1978 status = ocfs2_init_slot_info(osb); 1979 if (status < 0) { 1980 mlog_errno(status); 1981 goto bail; 1982 } 1983 1984 bail: 1985 mlog_exit(status); 1986 return status; 1987 } 1988 1989 /* 1990 * will return: -EAGAIN if it is ok to keep searching for superblocks 1991 * -EINVAL if there is a bad superblock 1992 * 0 on success 1993 */ 1994 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 1995 struct buffer_head *bh, 1996 u32 blksz) 1997 { 1998 int status = -EAGAIN; 1999 2000 mlog_entry_void(); 2001 2002 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2003 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2004 /* We have to do a raw check of the feature here */ 2005 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2006 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2007 status = ocfs2_block_check_validate(bh->b_data, 2008 bh->b_size, 2009 &di->i_check); 2010 if (status) 2011 goto out; 2012 } 2013 status = -EINVAL; 2014 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2015 mlog(ML_ERROR, "found superblock with incorrect block " 2016 "size: found %u, should be %u\n", 2017 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2018 blksz); 2019 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2020 OCFS2_MAJOR_REV_LEVEL || 2021 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2022 OCFS2_MINOR_REV_LEVEL) { 2023 mlog(ML_ERROR, "found superblock with bad version: " 2024 "found %u.%u, should be %u.%u\n", 2025 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2026 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2027 OCFS2_MAJOR_REV_LEVEL, 2028 OCFS2_MINOR_REV_LEVEL); 2029 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2030 mlog(ML_ERROR, "bad block number on superblock: " 2031 "found %llu, should be %llu\n", 2032 (unsigned long long)le64_to_cpu(di->i_blkno), 2033 (unsigned long long)bh->b_blocknr); 2034 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2035 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2036 mlog(ML_ERROR, "bad cluster size found: %u\n", 2037 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2038 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2039 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2040 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2041 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2042 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2043 mlog(ML_ERROR, 2044 "Superblock slots found greater than file system " 2045 "maximum: found %u, max %u\n", 2046 le16_to_cpu(di->id2.i_super.s_max_slots), 2047 OCFS2_MAX_SLOTS); 2048 } else { 2049 /* found it! */ 2050 status = 0; 2051 } 2052 } 2053 2054 out: 2055 mlog_exit(status); 2056 return status; 2057 } 2058 2059 static int ocfs2_check_volume(struct ocfs2_super *osb) 2060 { 2061 int status; 2062 int dirty; 2063 int local; 2064 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2065 * recover 2066 * ourselves. */ 2067 2068 mlog_entry_void(); 2069 2070 /* Init our journal object. */ 2071 status = ocfs2_journal_init(osb->journal, &dirty); 2072 if (status < 0) { 2073 mlog(ML_ERROR, "Could not initialize journal!\n"); 2074 goto finally; 2075 } 2076 2077 /* If the journal was unmounted cleanly then we don't want to 2078 * recover anything. Otherwise, journal_load will do that 2079 * dirty work for us :) */ 2080 if (!dirty) { 2081 status = ocfs2_journal_wipe(osb->journal, 0); 2082 if (status < 0) { 2083 mlog_errno(status); 2084 goto finally; 2085 } 2086 } else { 2087 mlog(ML_NOTICE, "File system was not unmounted cleanly, " 2088 "recovering volume.\n"); 2089 } 2090 2091 local = ocfs2_mount_local(osb); 2092 2093 /* will play back anything left in the journal. */ 2094 status = ocfs2_journal_load(osb->journal, local, dirty); 2095 if (status < 0) { 2096 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2097 goto finally; 2098 } 2099 2100 if (dirty) { 2101 /* recover my local alloc if we didn't unmount cleanly. */ 2102 status = ocfs2_begin_local_alloc_recovery(osb, 2103 osb->slot_num, 2104 &local_alloc); 2105 if (status < 0) { 2106 mlog_errno(status); 2107 goto finally; 2108 } 2109 /* we complete the recovery process after we've marked 2110 * ourselves as mounted. */ 2111 } 2112 2113 mlog(0, "Journal loaded.\n"); 2114 2115 status = ocfs2_load_local_alloc(osb); 2116 if (status < 0) { 2117 mlog_errno(status); 2118 goto finally; 2119 } 2120 2121 if (dirty) { 2122 /* Recovery will be completed after we've mounted the 2123 * rest of the volume. */ 2124 osb->dirty = 1; 2125 osb->local_alloc_copy = local_alloc; 2126 local_alloc = NULL; 2127 } 2128 2129 /* go through each journal, trylock it and if you get the 2130 * lock, and it's marked as dirty, set the bit in the recover 2131 * map and launch a recovery thread for it. */ 2132 status = ocfs2_mark_dead_nodes(osb); 2133 if (status < 0) 2134 mlog_errno(status); 2135 2136 finally: 2137 if (local_alloc) 2138 kfree(local_alloc); 2139 2140 mlog_exit(status); 2141 return status; 2142 } 2143 2144 /* 2145 * The routine gets called from dismount or close whenever a dismount on 2146 * volume is requested and the osb open count becomes 1. 2147 * It will remove the osb from the global list and also free up all the 2148 * initialized resources and fileobject. 2149 */ 2150 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2151 { 2152 mlog_entry_void(); 2153 2154 /* This function assumes that the caller has the main osb resource */ 2155 2156 ocfs2_free_slot_info(osb); 2157 2158 kfree(osb->osb_orphan_wipes); 2159 kfree(osb->slot_recovery_generations); 2160 /* FIXME 2161 * This belongs in journal shutdown, but because we have to 2162 * allocate osb->journal at the start of ocfs2_initalize_osb(), 2163 * we free it here. 2164 */ 2165 kfree(osb->journal); 2166 if (osb->local_alloc_copy) 2167 kfree(osb->local_alloc_copy); 2168 kfree(osb->uuid_str); 2169 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2170 memset(osb, 0, sizeof(struct ocfs2_super)); 2171 2172 mlog_exit_void(); 2173 } 2174 2175 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2176 * panic(). We do not support continue-on-error operation. */ 2177 static void ocfs2_handle_error(struct super_block *sb) 2178 { 2179 struct ocfs2_super *osb = OCFS2_SB(sb); 2180 2181 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2182 panic("OCFS2: (device %s): panic forced after error\n", 2183 sb->s_id); 2184 2185 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2186 2187 if (sb->s_flags & MS_RDONLY && 2188 (ocfs2_is_soft_readonly(osb) || 2189 ocfs2_is_hard_readonly(osb))) 2190 return; 2191 2192 printk(KERN_CRIT "File system is now read-only due to the potential " 2193 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2194 "system is unmounted.\n"); 2195 sb->s_flags |= MS_RDONLY; 2196 ocfs2_set_ro_flag(osb, 0); 2197 } 2198 2199 static char error_buf[1024]; 2200 2201 void __ocfs2_error(struct super_block *sb, 2202 const char *function, 2203 const char *fmt, ...) 2204 { 2205 va_list args; 2206 2207 va_start(args, fmt); 2208 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2209 va_end(args); 2210 2211 /* Not using mlog here because we want to show the actual 2212 * function the error came from. */ 2213 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", 2214 sb->s_id, function, error_buf); 2215 2216 ocfs2_handle_error(sb); 2217 } 2218 2219 /* Handle critical errors. This is intentionally more drastic than 2220 * ocfs2_handle_error, so we only use for things like journal errors, 2221 * etc. */ 2222 void __ocfs2_abort(struct super_block* sb, 2223 const char *function, 2224 const char *fmt, ...) 2225 { 2226 va_list args; 2227 2228 va_start(args, fmt); 2229 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2230 va_end(args); 2231 2232 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", 2233 sb->s_id, function, error_buf); 2234 2235 /* We don't have the cluster support yet to go straight to 2236 * hard readonly in here. Until then, we want to keep 2237 * ocfs2_abort() so that we can at least mark critical 2238 * errors. 2239 * 2240 * TODO: This should abort the journal and alert other nodes 2241 * that our slot needs recovery. */ 2242 2243 /* Force a panic(). This stinks, but it's better than letting 2244 * things continue without having a proper hard readonly 2245 * here. */ 2246 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2247 ocfs2_handle_error(sb); 2248 } 2249 2250 module_init(ocfs2_init); 2251 module_exit(ocfs2_exit); 2252