1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * 4 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. 5 * 6 * 7 * terminology 8 * 9 * cluster - allocation unit - 512,1K,2K,4K,...,2M 10 * vcn - virtual cluster number - Offset inside the file in clusters. 11 * vbo - virtual byte offset - Offset inside the file in bytes. 12 * lcn - logical cluster number - 0 based cluster in clusters heap. 13 * lbo - logical byte offset - Absolute position inside volume. 14 * run - maps VCN to LCN - Stored in attributes in packed form. 15 * attr - attribute segment - std/name/data etc records inside MFT. 16 * mi - MFT inode - One MFT record(usually 1024 bytes or 4K), consists of attributes. 17 * ni - NTFS inode - Extends linux inode. consists of one or more mft inodes. 18 * index - unit inside directory - 2K, 4K, <=page size, does not depend on cluster size. 19 * resident attribute - Attribute with content stored directly in the MFT record 20 * non-resident attribute - Attribute with content stored in clusters 21 * data_size - Size of attribute content in bytes. Equal to inode->i_size 22 * valid_size - Number of bytes written to the non-resident attribute 23 * allocated_size - Total size of clusters allocated for non-resident content 24 * total_size - Actual size of allocated clusters for sparse or compressed attributes 25 * - Constraint: valid_size <= data_size <= allocated_size 26 * ADS - Alternative data stream: Named data attribute (0x80) 27 * 28 * WSL - Windows Subsystem for Linux 29 * https://docs.microsoft.com/en-us/windows/wsl/file-permissions 30 * It stores uid/gid/mode/dev in xattr 31 * 32 * ntfs allows up to 2^64 clusters per volume. 33 * It means you should use 64 bits lcn to operate with ntfs. 34 * Implementation of ntfs.sys uses only 32 bits lcn. 35 * Default ntfs3 uses 32 bits lcn too. 36 * ntfs3 built with CONFIG_NTFS3_64BIT_CLUSTER (ntfs3_64) uses 64 bits per lcn. 37 * 38 * 39 * ntfs limits, cluster size is 4K (2^12) 40 * ----------------------------------------------------------------------------- 41 * | Volume size | Clusters | ntfs.sys | ntfs3 | ntfs3_64 | mkntfs | chkdsk | 42 * ----------------------------------------------------------------------------- 43 * | < 16T, 2^44 | < 2^32 | yes | yes | yes | yes | yes | 44 * | > 16T, 2^44 | > 2^32 | no | no | yes | yes | yes | 45 * ----------------------------------------------------------|------------------ 46 * 47 * To mount large volumes as ntfs one should use large cluster size (up to 2M) 48 * The maximum volume size in this case is 2^32 * 2^21 = 2^53 = 8P 49 * 50 * ntfs limits, cluster size is 2M (2^21) 51 * ----------------------------------------------------------------------------- 52 * | < 8P, 2^53 | < 2^32 | yes | yes | yes | yes | yes | 53 * | > 8P, 2^53 | > 2^32 | no | no | yes | yes | yes | 54 * ----------------------------------------------------------|------------------ 55 * 56 */ 57 58 #include <linux/blkdev.h> 59 #include <linux/buffer_head.h> 60 #include <linux/exportfs.h> 61 #include <linux/fs.h> 62 #include <linux/fs_context.h> 63 #include <linux/fs_parser.h> 64 #include <linux/fs_struct.h> 65 #include <linux/log2.h> 66 #include <linux/minmax.h> 67 #include <linux/module.h> 68 #include <linux/nls.h> 69 #include <linux/overflow.h> 70 #include <linux/proc_fs.h> 71 #include <linux/seq_file.h> 72 #include <linux/statfs.h> 73 74 #include "debug.h" 75 #include "ntfs.h" 76 #include "ntfs_fs.h" 77 #ifdef CONFIG_NTFS3_LZX_XPRESS 78 #include "lib/lib.h" 79 #endif 80 81 #ifdef CONFIG_PRINTK 82 /* 83 * ntfs_printk - Trace warnings/notices/errors. 84 * 85 * Thanks Joe Perches <joe@perches.com> for implementation 86 */ 87 void ntfs_printk(const struct super_block *sb, const char *fmt, ...) 88 { 89 struct va_format vaf; 90 va_list args; 91 int level; 92 struct ntfs_sb_info *sbi = sb->s_fs_info; 93 94 /* Should we use different ratelimits for warnings/notices/errors? */ 95 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) 96 return; 97 98 va_start(args, fmt); 99 100 level = printk_get_level(fmt); 101 vaf.fmt = printk_skip_level(fmt); 102 vaf.va = &args; 103 printk("%c%cntfs3(%s): %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf); 104 105 va_end(args); 106 } 107 108 static char s_name_buf[512]; 109 static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'. 110 111 /* 112 * ntfs_inode_printk 113 * 114 * Print warnings/notices/errors about inode using name or inode number. 115 */ 116 void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) 117 { 118 struct super_block *sb = inode->i_sb; 119 struct ntfs_sb_info *sbi = sb->s_fs_info; 120 char *name; 121 va_list args; 122 struct va_format vaf; 123 int level; 124 125 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) 126 return; 127 128 /* Use static allocated buffer, if possible. */ 129 name = atomic_dec_and_test(&s_name_buf_cnt) ? 130 s_name_buf : 131 kmalloc(sizeof(s_name_buf), GFP_NOFS); 132 133 if (name) { 134 struct dentry *de = d_find_alias(inode); 135 136 if (de) { 137 int len; 138 spin_lock(&de->d_lock); 139 len = snprintf(name, sizeof(s_name_buf), " \"%s\"", 140 de->d_name.name); 141 spin_unlock(&de->d_lock); 142 if (len <= 0) 143 name[0] = 0; 144 else if (len >= sizeof(s_name_buf)) 145 name[sizeof(s_name_buf) - 1] = 0; 146 } else { 147 name[0] = 0; 148 } 149 dput(de); /* Cocci warns if placed in branch "if (de)" */ 150 } 151 152 va_start(args, fmt); 153 154 level = printk_get_level(fmt); 155 vaf.fmt = printk_skip_level(fmt); 156 vaf.va = &args; 157 158 printk("%c%cntfs3(%s): ino=%llx,%s %pV\n", KERN_SOH_ASCII, level, 159 sb->s_id, inode->i_ino, name ? name : "", &vaf); 160 161 va_end(args); 162 163 atomic_inc(&s_name_buf_cnt); 164 if (name != s_name_buf) 165 kfree(name); 166 } 167 #endif 168 169 /* 170 * Shared memory struct. 171 * 172 * On-disk ntfs's upcase table is created by ntfs formatter. 173 * 'upcase' table is 128K bytes of memory. 174 * We should read it into memory when mounting. 175 * Several ntfs volumes likely use the same 'upcase' table. 176 * It is good idea to share in-memory 'upcase' table between different volumes. 177 * Unfortunately winxp/vista/win7 use different upcase tables. 178 */ 179 static DEFINE_SPINLOCK(s_shared_lock); 180 181 static struct { 182 void *ptr; 183 u32 len; 184 int cnt; 185 } s_shared[8]; 186 187 /* 188 * ntfs_set_shared 189 * 190 * Return: 191 * * @ptr - If pointer was saved in shared memory. 192 * * NULL - If pointer was not shared. 193 */ 194 void *ntfs_set_shared(void *ptr, u32 bytes) 195 { 196 void *ret = NULL; 197 int i, j = -1; 198 199 spin_lock(&s_shared_lock); 200 for (i = 0; i < ARRAY_SIZE(s_shared); i++) { 201 if (!s_shared[i].cnt) { 202 j = i; 203 } else if (bytes == s_shared[i].len && 204 !memcmp(s_shared[i].ptr, ptr, bytes)) { 205 s_shared[i].cnt += 1; 206 ret = s_shared[i].ptr; 207 break; 208 } 209 } 210 211 if (!ret && j != -1) { 212 s_shared[j].ptr = ptr; 213 s_shared[j].len = bytes; 214 s_shared[j].cnt = 1; 215 ret = ptr; 216 } 217 spin_unlock(&s_shared_lock); 218 219 return ret; 220 } 221 222 /* 223 * ntfs_put_shared 224 * 225 * Return: 226 * * @ptr - If pointer is not shared anymore. 227 * * NULL - If pointer is still shared. 228 */ 229 void *ntfs_put_shared(void *ptr) 230 { 231 void *ret = ptr; 232 int i; 233 234 spin_lock(&s_shared_lock); 235 for (i = 0; i < ARRAY_SIZE(s_shared); i++) { 236 if (s_shared[i].cnt && s_shared[i].ptr == ptr) { 237 if (--s_shared[i].cnt) 238 ret = NULL; 239 break; 240 } 241 } 242 spin_unlock(&s_shared_lock); 243 244 return ret; 245 } 246 247 static inline void put_mount_options(struct ntfs_mount_options *options) 248 { 249 kfree(options->nls_name); 250 unload_nls(options->nls); 251 kfree(options); 252 } 253 254 enum Opt { 255 Opt_uid, 256 Opt_gid, 257 Opt_umask, 258 Opt_dmask, 259 Opt_fmask, 260 Opt_immutable, 261 Opt_discard, 262 Opt_force, 263 Opt_sparse, 264 Opt_nohidden, 265 Opt_hide_dot_files, 266 Opt_windows_names, 267 Opt_showmeta, 268 Opt_acl, 269 Opt_acl_bool, 270 Opt_iocharset, 271 Opt_prealloc, 272 Opt_prealloc_bool, 273 Opt_nocase, 274 Opt_delalloc, 275 Opt_delalloc_bool, 276 Opt_ads, 277 Opt_ads_bool, 278 Opt_err, 279 }; 280 281 // clang-format off 282 static const struct fs_parameter_spec ntfs_fs_parameters[] = { 283 fsparam_uid("uid", Opt_uid), 284 fsparam_gid("gid", Opt_gid), 285 fsparam_u32oct("umask", Opt_umask), 286 fsparam_u32oct("dmask", Opt_dmask), 287 fsparam_u32oct("fmask", Opt_fmask), 288 fsparam_flag("sys_immutable", Opt_immutable), 289 fsparam_flag("discard", Opt_discard), 290 fsparam_flag("force", Opt_force), 291 fsparam_flag("sparse", Opt_sparse), 292 fsparam_flag("nohidden", Opt_nohidden), 293 fsparam_flag("hide_dot_files", Opt_hide_dot_files), 294 fsparam_flag("windows_names", Opt_windows_names), 295 fsparam_flag("showmeta", Opt_showmeta), 296 fsparam_flag("acl", Opt_acl), 297 fsparam_bool("acl", Opt_acl_bool), 298 fsparam_string("iocharset", Opt_iocharset), 299 fsparam_flag("prealloc", Opt_prealloc), 300 fsparam_bool("prealloc", Opt_prealloc_bool), 301 fsparam_flag("nocase", Opt_nocase), 302 fsparam_flag("delalloc", Opt_delalloc), 303 fsparam_bool("delalloc", Opt_delalloc_bool), 304 fsparam_flag("ads", Opt_ads), 305 fsparam_bool("ads", Opt_ads_bool), 306 {} 307 }; 308 // clang-format on 309 310 /* 311 * Load nls table or if @nls is utf8 then return NULL. 312 * 313 */ 314 static struct nls_table *ntfs_load_nls(const char *nls) 315 { 316 struct nls_table *ret; 317 318 if (!nls) 319 nls = CONFIG_NLS_DEFAULT; 320 321 if (strcmp(nls, "utf8") == 0) 322 return NULL; 323 324 if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0) 325 return load_nls_default(); 326 327 ret = load_nls(nls); 328 if (ret) 329 return ret; 330 331 return ERR_PTR(-EINVAL); 332 } 333 334 static int ntfs_fs_parse_param(struct fs_context *fc, 335 struct fs_parameter *param) 336 { 337 struct ntfs_mount_options *opts = fc->fs_private; 338 struct fs_parse_result result; 339 int opt; 340 341 opt = fs_parse(fc, ntfs_fs_parameters, param, &result); 342 if (opt < 0) 343 return opt; 344 345 switch (opt) { 346 case Opt_uid: 347 opts->fs_uid = result.uid; 348 break; 349 case Opt_gid: 350 opts->fs_gid = result.gid; 351 break; 352 case Opt_umask: 353 if (result.uint_32 & ~07777) 354 return invalf(fc, "ntfs3: Invalid value for umask."); 355 opts->fs_fmask_inv = ~result.uint_32; 356 opts->fs_dmask_inv = ~result.uint_32; 357 opts->fmask = 1; 358 opts->dmask = 1; 359 break; 360 case Opt_dmask: 361 if (result.uint_32 & ~07777) 362 return invalf(fc, "ntfs3: Invalid value for dmask."); 363 opts->fs_dmask_inv = ~result.uint_32; 364 opts->dmask = 1; 365 break; 366 case Opt_fmask: 367 if (result.uint_32 & ~07777) 368 return invalf(fc, "ntfs3: Invalid value for fmask."); 369 opts->fs_fmask_inv = ~result.uint_32; 370 opts->fmask = 1; 371 break; 372 case Opt_immutable: 373 opts->sys_immutable = 1; 374 break; 375 case Opt_discard: 376 opts->discard = 1; 377 break; 378 case Opt_force: 379 opts->force = 1; 380 break; 381 case Opt_sparse: 382 opts->sparse = 1; 383 break; 384 case Opt_nohidden: 385 opts->nohidden = 1; 386 break; 387 case Opt_hide_dot_files: 388 opts->hide_dot_files = 1; 389 break; 390 case Opt_windows_names: 391 opts->windows_names = 1; 392 break; 393 case Opt_showmeta: 394 opts->showmeta = 1; 395 break; 396 case Opt_acl_bool: 397 if (result.boolean) { 398 fallthrough; 399 case Opt_acl: 400 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 401 fc->sb_flags |= SB_POSIXACL; 402 #else 403 return invalf( 404 fc, "ntfs3: Support for ACL not compiled in!"); 405 #endif 406 } else 407 fc->sb_flags &= ~SB_POSIXACL; 408 break; 409 case Opt_iocharset: 410 kfree(opts->nls_name); 411 opts->nls_name = param->string; 412 param->string = NULL; 413 break; 414 case Opt_prealloc: 415 opts->prealloc = 1; 416 break; 417 case Opt_prealloc_bool: 418 opts->prealloc = result.boolean; 419 break; 420 case Opt_nocase: 421 opts->nocase = 1; 422 break; 423 case Opt_delalloc: 424 opts->delalloc = 1; 425 break; 426 case Opt_delalloc_bool: 427 opts->delalloc = result.boolean; 428 break; 429 case Opt_ads: 430 opts->ads = 1; 431 break; 432 case Opt_ads_bool: 433 opts->ads = result.boolean; 434 break; 435 default: 436 /* Should not be here unless we forget add case. */ 437 return -EINVAL; 438 } 439 return 0; 440 } 441 442 static int ntfs_fs_reconfigure(struct fs_context *fc) 443 { 444 struct super_block *sb = fc->root->d_sb; 445 struct ntfs_sb_info *sbi = sb->s_fs_info; 446 struct ntfs_mount_options *new_opts = fc->fs_private; 447 int ro_rw; 448 449 ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY); 450 if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { 451 errorf(fc, 452 "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n"); 453 return -EINVAL; 454 } 455 456 new_opts->nls = ntfs_load_nls(new_opts->nls_name); 457 if (IS_ERR(new_opts->nls)) { 458 new_opts->nls = NULL; 459 errorf(fc, "ntfs3: Cannot load iocharset %s", 460 new_opts->nls_name); 461 return -EINVAL; 462 } 463 if (new_opts->nls != sbi->options->nls) 464 return invalf( 465 fc, 466 "ntfs3: Cannot use different iocharset when remounting!"); 467 468 if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) && 469 !new_opts->force) { 470 errorf(fc, 471 "ntfs3: Volume is dirty and \"force\" flag is not set!"); 472 return -EINVAL; 473 } 474 475 sync_filesystem(sb); 476 swap(sbi->options, fc->fs_private); 477 478 return 0; 479 } 480 481 #ifdef CONFIG_PROC_FS 482 static struct proc_dir_entry *proc_info_root; 483 484 /* 485 * ntfs3_volinfo: 486 * 487 * The content of /proc/fs/ntfs3/<dev>/volinfo 488 * 489 * ntfs3.1 490 * cluster size 491 * number of clusters 492 * total number of mft records 493 * number of used mft records ~= number of files + folders 494 * real state of ntfs "dirty"/"clean" 495 * current state of ntfs "dirty"/"clean" 496 */ 497 static int ntfs3_volinfo(struct seq_file *m, void *o) 498 { 499 struct super_block *sb = m->private; 500 struct ntfs_sb_info *sbi = sb->s_fs_info; 501 502 seq_printf(m, "ntfs%d.%d\n%u\n%zu\n%zu\n%zu\n%s\n%s\n", 503 sbi->volume.major_ver, sbi->volume.minor_ver, 504 sbi->cluster_size, sbi->used.bitmap.nbits, 505 sbi->mft.bitmap.nbits, 506 sbi->mft.bitmap.nbits - wnd_zeroes(&sbi->mft.bitmap), 507 sbi->volume.real_dirty ? "dirty" : "clean", 508 (sbi->volume.flags & VOLUME_FLAG_DIRTY) ? "dirty" : "clean"); 509 510 return 0; 511 } 512 513 static int ntfs3_volinfo_open(struct inode *inode, struct file *file) 514 { 515 return single_open(file, ntfs3_volinfo, pde_data(inode)); 516 } 517 518 /* read /proc/fs/ntfs3/<dev>/label */ 519 static int ntfs3_label_show(struct seq_file *m, void *o) 520 { 521 struct super_block *sb = m->private; 522 struct ntfs_sb_info *sbi = sb->s_fs_info; 523 524 seq_printf(m, "%s\n", sbi->volume.label); 525 526 return 0; 527 } 528 529 /* write /proc/fs/ntfs3/<dev>/label */ 530 static ssize_t ntfs3_label_write(struct file *file, const char __user *buffer, 531 size_t count, loff_t *ppos) 532 { 533 int err; 534 struct super_block *sb = pde_data(file_inode(file)); 535 ssize_t ret = count; 536 u8 *label; 537 538 if (sb_rdonly(sb)) 539 return -EROFS; 540 541 label = kmalloc(count, GFP_NOFS); 542 543 if (!label) 544 return -ENOMEM; 545 546 if (copy_from_user(label, buffer, ret)) { 547 ret = -EFAULT; 548 goto out; 549 } 550 while (ret > 0 && label[ret - 1] == '\n') 551 ret -= 1; 552 553 err = ntfs_set_label(sb->s_fs_info, label, ret); 554 555 if (err < 0) { 556 ntfs_err(sb, "failed (%d) to write label", err); 557 ret = err; 558 goto out; 559 } 560 561 *ppos += count; 562 ret = count; 563 out: 564 kfree(label); 565 return ret; 566 } 567 568 static int ntfs3_label_open(struct inode *inode, struct file *file) 569 { 570 return single_open(file, ntfs3_label_show, pde_data(inode)); 571 } 572 573 static const struct proc_ops ntfs3_volinfo_fops = { 574 .proc_read = seq_read, 575 .proc_lseek = seq_lseek, 576 .proc_release = single_release, 577 .proc_open = ntfs3_volinfo_open, 578 }; 579 580 static const struct proc_ops ntfs3_label_fops = { 581 .proc_read = seq_read, 582 .proc_lseek = seq_lseek, 583 .proc_release = single_release, 584 .proc_open = ntfs3_label_open, 585 .proc_write = ntfs3_label_write, 586 }; 587 588 static void ntfs_create_procdir(struct super_block *sb) 589 { 590 struct proc_dir_entry *e; 591 592 if (!proc_info_root) 593 return; 594 595 e = proc_mkdir(sb->s_id, proc_info_root); 596 if (e) { 597 struct ntfs_sb_info *sbi = sb->s_fs_info; 598 599 proc_create_data("volinfo", 0444, e, &ntfs3_volinfo_fops, sb); 600 proc_create_data("label", 0644, e, &ntfs3_label_fops, sb); 601 sbi->procdir = e; 602 } 603 } 604 605 static void ntfs_remove_procdir(struct super_block *sb) 606 { 607 struct ntfs_sb_info *sbi = sb->s_fs_info; 608 609 if (!sbi->procdir) 610 return; 611 612 remove_proc_entry("label", sbi->procdir); 613 remove_proc_entry("volinfo", sbi->procdir); 614 remove_proc_entry(sb->s_id, proc_info_root); 615 sbi->procdir = NULL; 616 } 617 618 static void ntfs_create_proc_root(void) 619 { 620 proc_info_root = proc_mkdir("fs/ntfs3", NULL); 621 } 622 623 static void ntfs_remove_proc_root(void) 624 { 625 if (proc_info_root) { 626 remove_proc_entry("fs/ntfs3", NULL); 627 proc_info_root = NULL; 628 } 629 } 630 #else 631 // clang-format off 632 static void ntfs_create_procdir(struct super_block *sb){} 633 static void ntfs_remove_procdir(struct super_block *sb){} 634 static void ntfs_create_proc_root(void){} 635 static void ntfs_remove_proc_root(void){} 636 // clang-format on 637 #endif 638 639 static struct kmem_cache *ntfs_inode_cachep; 640 641 static struct inode *ntfs_alloc_inode(struct super_block *sb) 642 { 643 struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS); 644 645 if (!ni) 646 return NULL; 647 648 memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode)); 649 mutex_init(&ni->ni_lock); 650 return &ni->vfs_inode; 651 } 652 653 static void ntfs_free_inode(struct inode *inode) 654 { 655 struct ntfs_inode *ni = ntfs_i(inode); 656 657 mutex_destroy(&ni->ni_lock); 658 kmem_cache_free(ntfs_inode_cachep, ni); 659 } 660 661 static void init_once(void *foo) 662 { 663 struct ntfs_inode *ni = foo; 664 665 inode_init_once(&ni->vfs_inode); 666 } 667 668 /* 669 * Noinline to reduce binary size. 670 */ 671 static noinline void ntfs3_put_sbi(struct ntfs_sb_info *sbi) 672 { 673 wnd_close(&sbi->mft.bitmap); 674 wnd_close(&sbi->used.bitmap); 675 676 if (sbi->mft.ni) { 677 iput(&sbi->mft.ni->vfs_inode); 678 sbi->mft.ni = NULL; 679 } 680 681 if (sbi->security.ni) { 682 iput(&sbi->security.ni->vfs_inode); 683 sbi->security.ni = NULL; 684 } 685 686 if (sbi->reparse.ni) { 687 iput(&sbi->reparse.ni->vfs_inode); 688 sbi->reparse.ni = NULL; 689 } 690 691 if (sbi->objid.ni) { 692 iput(&sbi->objid.ni->vfs_inode); 693 sbi->objid.ni = NULL; 694 } 695 696 if (sbi->volume.ni) { 697 iput(&sbi->volume.ni->vfs_inode); 698 sbi->volume.ni = NULL; 699 } 700 701 ntfs_update_mftmirr(sbi); 702 703 indx_clear(&sbi->security.index_sii); 704 indx_clear(&sbi->security.index_sdh); 705 indx_clear(&sbi->reparse.index_r); 706 indx_clear(&sbi->objid.index_o); 707 } 708 709 static void ntfs3_free_sbi(struct ntfs_sb_info *sbi) 710 { 711 kfree(sbi->new_rec); 712 kvfree(ntfs_put_shared(sbi->upcase)); 713 kvfree(sbi->def_table); 714 kfree(sbi->compress.lznt); 715 #ifdef CONFIG_NTFS3_LZX_XPRESS 716 xpress_free_decompressor(sbi->compress.xpress); 717 lzx_free_decompressor(sbi->compress.lzx); 718 #endif 719 kfree(sbi); 720 } 721 722 static void ntfs_put_super(struct super_block *sb) 723 { 724 struct ntfs_sb_info *sbi = sb->s_fs_info; 725 726 ntfs_remove_procdir(sb); 727 728 /* Mark rw ntfs as clear, if possible. */ 729 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); 730 731 if (sbi->options) { 732 put_mount_options(sbi->options); 733 sbi->options = NULL; 734 } 735 736 ntfs3_put_sbi(sbi); 737 } 738 739 static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf) 740 { 741 struct super_block *sb = dentry->d_sb; 742 struct ntfs_sb_info *sbi = sb->s_fs_info; 743 struct wnd_bitmap *wnd = &sbi->used.bitmap; 744 CLST da_clusters = ntfs_get_da(sbi); 745 746 buf->f_type = sb->s_magic; 747 buf->f_bsize = buf->f_frsize = sbi->cluster_size; 748 buf->f_blocks = wnd->nbits; 749 750 buf->f_bfree = wnd_zeroes(wnd); 751 if (buf->f_bfree > da_clusters) { 752 buf->f_bfree -= da_clusters; 753 } else { 754 buf->f_bfree = 0; 755 } 756 buf->f_bavail = buf->f_bfree; 757 758 buf->f_fsid.val[0] = sbi->volume.ser_num; 759 buf->f_fsid.val[1] = sbi->volume.ser_num >> 32; 760 buf->f_namelen = NTFS_NAME_LEN; 761 762 return 0; 763 } 764 765 static int ntfs_show_options(struct seq_file *m, struct dentry *root) 766 { 767 struct super_block *sb = root->d_sb; 768 struct ntfs_sb_info *sbi = sb->s_fs_info; 769 struct ntfs_mount_options *opts = sbi->options; 770 struct user_namespace *user_ns = seq_user_ns(m); 771 772 seq_printf(m, ",uid=%u", from_kuid_munged(user_ns, opts->fs_uid)); 773 seq_printf(m, ",gid=%u", from_kgid_munged(user_ns, opts->fs_gid)); 774 if (opts->dmask) 775 seq_printf(m, ",dmask=%04o", opts->fs_dmask_inv ^ 0xffff); 776 if (opts->fmask) 777 seq_printf(m, ",fmask=%04o", opts->fs_fmask_inv ^ 0xffff); 778 if (opts->sys_immutable) 779 seq_puts(m, ",sys_immutable"); 780 if (opts->discard) 781 seq_puts(m, ",discard"); 782 if (opts->force) 783 seq_puts(m, ",force"); 784 if (opts->sparse) 785 seq_puts(m, ",sparse"); 786 if (opts->nohidden) 787 seq_puts(m, ",nohidden"); 788 if (opts->hide_dot_files) 789 seq_puts(m, ",hide_dot_files"); 790 if (opts->windows_names) 791 seq_puts(m, ",windows_names"); 792 if (opts->showmeta) 793 seq_puts(m, ",showmeta"); 794 if (sb->s_flags & SB_POSIXACL) 795 seq_puts(m, ",acl"); 796 if (opts->nls) 797 seq_printf(m, ",iocharset=%s", opts->nls->charset); 798 else 799 seq_puts(m, ",iocharset=utf8"); 800 if (opts->prealloc) 801 seq_puts(m, ",prealloc"); 802 if (opts->nocase) 803 seq_puts(m, ",nocase"); 804 if (opts->delalloc) 805 seq_puts(m, ",delalloc"); 806 if (opts->ads) 807 seq_puts(m, ",ads"); 808 809 return 0; 810 } 811 812 /* 813 * ntfs_shutdown - super_operations::shutdown 814 */ 815 static void ntfs_shutdown(struct super_block *sb) 816 { 817 set_bit(NTFS_FLAGS_SHUTDOWN_BIT, &ntfs_sb(sb)->flags); 818 } 819 820 /* 821 * ntfs_sync_fs - super_operations::sync_fs 822 */ 823 static int ntfs_sync_fs(struct super_block *sb, int wait) 824 { 825 int err = 0, err2; 826 struct ntfs_sb_info *sbi = sb->s_fs_info; 827 struct ntfs_inode *ni; 828 struct inode *inode; 829 830 if (unlikely(ntfs3_forced_shutdown(sb))) 831 return -EIO; 832 833 ni = sbi->security.ni; 834 if (ni) { 835 inode = &ni->vfs_inode; 836 err2 = _ni_write_inode(inode, wait); 837 if (err2 && !err) 838 err = err2; 839 } 840 841 ni = sbi->objid.ni; 842 if (ni) { 843 inode = &ni->vfs_inode; 844 err2 = _ni_write_inode(inode, wait); 845 if (err2 && !err) 846 err = err2; 847 } 848 849 ni = sbi->reparse.ni; 850 if (ni) { 851 inode = &ni->vfs_inode; 852 err2 = _ni_write_inode(inode, wait); 853 if (err2 && !err) 854 err = err2; 855 } 856 857 if (!err) 858 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); 859 860 ntfs_update_mftmirr(sbi); 861 862 if (wait) { 863 sync_blockdev(sb->s_bdev); 864 blkdev_issue_flush(sb->s_bdev); 865 } 866 867 return err; 868 } 869 870 static const struct super_operations ntfs_sops = { 871 .alloc_inode = ntfs_alloc_inode, 872 .free_inode = ntfs_free_inode, 873 .evict_inode = ntfs_evict_inode, 874 .put_super = ntfs_put_super, 875 .statfs = ntfs_statfs, 876 .show_options = ntfs_show_options, 877 .shutdown = ntfs_shutdown, 878 .sync_fs = ntfs_sync_fs, 879 .write_inode = ntfs3_write_inode, 880 }; 881 882 static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino, 883 u32 generation) 884 { 885 struct MFT_REF ref; 886 struct inode *inode; 887 888 ref.low = cpu_to_le32(ino); 889 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 890 ref.high = cpu_to_le16(ino >> 32); 891 #else 892 ref.high = 0; 893 #endif 894 ref.seq = cpu_to_le16(generation); 895 896 inode = ntfs_iget5(sb, &ref, NULL); 897 if (!IS_ERR(inode) && is_bad_inode(inode)) { 898 iput(inode); 899 inode = ERR_PTR(-ESTALE); 900 } 901 902 return inode; 903 } 904 905 static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid, 906 int fh_len, int fh_type) 907 { 908 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 909 ntfs_export_get_inode); 910 } 911 912 static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid, 913 int fh_len, int fh_type) 914 { 915 return generic_fh_to_parent(sb, fid, fh_len, fh_type, 916 ntfs_export_get_inode); 917 } 918 919 /* TODO: == ntfs_sync_inode */ 920 static int ntfs_nfs_commit_metadata(struct inode *inode) 921 { 922 return _ni_write_inode(inode, 1); 923 } 924 925 static const struct export_operations ntfs_export_ops = { 926 .encode_fh = generic_encode_ino32_fh, 927 .fh_to_dentry = ntfs_fh_to_dentry, 928 .fh_to_parent = ntfs_fh_to_parent, 929 .get_parent = ntfs3_get_parent, 930 .commit_metadata = ntfs_nfs_commit_metadata, 931 }; 932 933 /* 934 * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb". 935 */ 936 static u32 format_size_gb(const u64 bytes, u32 *mb) 937 { 938 /* Do simple right 30 bit shift of 64 bit value. */ 939 u64 kbytes = bytes >> 10; 940 u32 kbytes32 = kbytes; 941 942 *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20; 943 if (*mb >= 100) 944 *mb = 99; 945 946 return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12); 947 } 948 949 static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot) 950 { 951 if (boot->sectors_per_clusters <= 0x80) 952 return boot->sectors_per_clusters; 953 if (boot->sectors_per_clusters >= 0xf4) /* limit shift to 2MB max */ 954 return 1U << (-(s8)boot->sectors_per_clusters); 955 return -EINVAL; 956 } 957 958 /* 959 * ntfs_init_from_boot - Init internal info from on-disk boot sector. 960 * 961 * NTFS mount begins from boot - special formatted 512 bytes. 962 * There are two boots: the first and the last 512 bytes of volume. 963 * The content of boot is not changed during ntfs life. 964 * 965 * NOTE: ntfs.sys checks only first (primary) boot. 966 * chkdsk checks both boots. 967 */ 968 static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, 969 u64 dev_size, struct NTFS_BOOT **boot2) 970 { 971 struct ntfs_sb_info *sbi = sb->s_fs_info; 972 int err; 973 u32 mb, gb, boot_sector_size, sct_per_clst, record_size; 974 u64 sectors, clusters, mlcn, mlcn2, mft_pos, mft2_pos, dev_size0; 975 struct NTFS_BOOT *boot; 976 struct buffer_head *bh; 977 struct MFT_REC *rec; 978 u16 fn, ao; 979 u8 cluster_bits; 980 u32 boot_off = 0; 981 sector_t boot_block = 0; 982 const char *hint = "Primary boot"; 983 984 /* Save original dev_size. Used with alternative boot. */ 985 dev_size0 = dev_size; 986 987 sbi->volume.blocks = dev_size >> PAGE_SHIFT; 988 989 /* Set dummy blocksize to read boot_block. */ 990 if (!sb_min_blocksize(sb, PAGE_SIZE)) { 991 return -EINVAL; 992 } 993 994 read_boot: 995 bh = ntfs_bread(sb, boot_block); 996 if (!bh) 997 return boot_block ? -EINVAL : -EIO; 998 999 err = -EINVAL; 1000 1001 /* Corrupted image; do not read OOB */ 1002 if (bh->b_size - sizeof(*boot) < boot_off) 1003 goto out; 1004 1005 boot = (struct NTFS_BOOT *)Add2Ptr(bh->b_data, boot_off); 1006 1007 if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) { 1008 ntfs_err(sb, "%s signature is not NTFS.", hint); 1009 goto out; 1010 } 1011 1012 /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/ 1013 /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1]) 1014 * goto out; 1015 */ 1016 1017 boot_sector_size = ((u32)boot->bytes_per_sector[1] << 8) | 1018 boot->bytes_per_sector[0]; 1019 if (boot_sector_size < SECTOR_SIZE || 1020 !is_power_of_2(boot_sector_size)) { 1021 ntfs_err(sb, "%s: invalid bytes per sector %u.", hint, 1022 boot_sector_size); 1023 goto out; 1024 } 1025 1026 /* cluster size: 512, 1K, 2K, 4K, ... 2M */ 1027 sct_per_clst = true_sectors_per_clst(boot); 1028 if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) { 1029 ntfs_err(sb, "%s: invalid sectors per cluster %u.", hint, 1030 sct_per_clst); 1031 goto out; 1032 } 1033 1034 sbi->cluster_size = boot_sector_size * sct_per_clst; 1035 sbi->cluster_bits = cluster_bits = blksize_bits(sbi->cluster_size); 1036 sbi->cluster_mask = sbi->cluster_size - 1; 1037 sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask; 1038 1039 mlcn = le64_to_cpu(boot->mft_clst); 1040 mlcn2 = le64_to_cpu(boot->mft2_clst); 1041 sectors = le64_to_cpu(boot->sectors_per_volume); 1042 1043 /* 1044 * Convert mlcn/mlcn2 to sector positions before comparing with 1045 * 'sectors'. All three are u64 values that come from the boot 1046 * sector, so use check_mul_overflow() to keep a wraparound from 1047 * silently bypassing the comparison. 1048 */ 1049 if (check_mul_overflow(mlcn, (u64)sct_per_clst, &mft_pos) || 1050 check_mul_overflow(mlcn2, (u64)sct_per_clst, &mft2_pos) || 1051 mft_pos >= sectors || mft2_pos >= sectors) { 1052 ntfs_err( 1053 sb, 1054 "%s: start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.", 1055 hint, mlcn, mlcn2, sectors); 1056 goto out; 1057 } 1058 1059 if (boot->record_size >= 0) { 1060 record_size = (u32)boot->record_size << cluster_bits; 1061 } else if (-boot->record_size <= MAXIMUM_SHIFT_BYTES_PER_MFT) { 1062 record_size = 1u << (-boot->record_size); 1063 } else { 1064 ntfs_err(sb, "%s: invalid record size %d.", hint, 1065 boot->record_size); 1066 goto out; 1067 } 1068 1069 sbi->record_size = record_size; 1070 sbi->record_bits = blksize_bits(record_size); 1071 sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes 1072 1073 /* Check MFT record size. */ 1074 if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) { 1075 ntfs_err(sb, "%s: invalid bytes per MFT record %u (%d).", hint, 1076 record_size, boot->record_size); 1077 goto out; 1078 } 1079 1080 if (record_size > MAXIMUM_BYTES_PER_MFT) { 1081 ntfs_err(sb, "Unsupported bytes per MFT record %u.", 1082 record_size); 1083 goto out; 1084 } 1085 1086 if (boot->index_size >= 0) { 1087 sbi->index_size = (u32)boot->index_size << cluster_bits; 1088 } else if (-boot->index_size <= MAXIMUM_SHIFT_BYTES_PER_INDEX) { 1089 sbi->index_size = 1u << (-boot->index_size); 1090 } else { 1091 ntfs_err(sb, "%s: invalid index size %d.", hint, 1092 boot->index_size); 1093 goto out; 1094 } 1095 1096 /* Check index record size. */ 1097 if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) { 1098 ntfs_err(sb, "%s: invalid bytes per index %u(%d).", hint, 1099 sbi->index_size, boot->index_size); 1100 goto out; 1101 } 1102 1103 if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) { 1104 ntfs_err(sb, "%s: unsupported bytes per index %u.", hint, 1105 sbi->index_size); 1106 goto out; 1107 } 1108 1109 sbi->volume.size = sectors * boot_sector_size; 1110 1111 gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb); 1112 1113 /* 1114 * - Volume formatted and mounted with the same sector size. 1115 * - Volume formatted 4K and mounted as 512. 1116 * - Volume formatted 512 and mounted as 4K. 1117 */ 1118 if (boot_sector_size != sector_size) { 1119 ntfs_warn( 1120 sb, 1121 "Different NTFS sector size (%u) and media sector size (%u).", 1122 boot_sector_size, sector_size); 1123 dev_size += sector_size - 1; 1124 } 1125 1126 sbi->bdev_blocksize = max(boot_sector_size, sector_size); 1127 sbi->mft.lbo = mlcn << cluster_bits; 1128 sbi->mft.lbo2 = mlcn2 << cluster_bits; 1129 1130 /* Compare boot's cluster and sector. */ 1131 if (sbi->cluster_size < boot_sector_size) { 1132 ntfs_err(sb, "%s: invalid bytes per cluster (%u).", hint, 1133 sbi->cluster_size); 1134 goto out; 1135 } 1136 1137 /* Compare boot's cluster and media sector. */ 1138 if (sbi->cluster_size < sector_size) { 1139 /* No way to use ntfs_get_block in this case. */ 1140 ntfs_err( 1141 sb, 1142 "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u).", 1143 sbi->cluster_size, sector_size); 1144 goto out; 1145 } 1146 1147 sbi->max_bytes_per_attr = 1148 record_size - ALIGN(MFTRECORD_FIXUP_OFFSET, 8) - 1149 ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) - 1150 ALIGN(sizeof(enum ATTR_TYPE), 8); 1151 1152 sbi->volume.ser_num = le64_to_cpu(boot->serial_num); 1153 1154 /* Warning if RAW volume. */ 1155 if (dev_size < sbi->volume.size + boot_sector_size) { 1156 u32 mb0, gb0; 1157 1158 gb0 = format_size_gb(dev_size, &mb0); 1159 ntfs_warn( 1160 sb, 1161 "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only.", 1162 gb, mb, gb0, mb0); 1163 sb->s_flags |= SB_RDONLY; 1164 } 1165 1166 clusters = sbi->volume.size >> cluster_bits; 1167 #ifndef CONFIG_NTFS3_64BIT_CLUSTER 1168 /* 32 bits per cluster. */ 1169 if (clusters >> 32) { 1170 ntfs_notice( 1171 sb, 1172 "NTFS %u.%02u Gb is too big to use 32 bits per cluster.", 1173 gb, mb); 1174 goto out; 1175 } 1176 #elif BITS_PER_LONG < 64 1177 #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS" 1178 #endif 1179 1180 sbi->used.bitmap.nbits = clusters; 1181 1182 rec = kzalloc(record_size, GFP_NOFS); 1183 if (!rec) { 1184 err = -ENOMEM; 1185 goto out; 1186 } 1187 1188 sbi->new_rec = rec; 1189 rec->rhdr.sign = NTFS_FILE_SIGNATURE; 1190 rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET); 1191 fn = (sbi->record_size >> SECTOR_SHIFT) + 1; 1192 rec->rhdr.fix_num = cpu_to_le16(fn); 1193 ao = ALIGN(MFTRECORD_FIXUP_OFFSET + sizeof(short) * fn, 8); 1194 rec->attr_off = cpu_to_le16(ao); 1195 rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8)); 1196 rec->total = cpu_to_le32(sbi->record_size); 1197 ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END; 1198 1199 if (!sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE))) { 1200 err = -EINVAL; 1201 goto out; 1202 } 1203 1204 sbi->block_mask = sb->s_blocksize - 1; 1205 sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits; 1206 sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits; 1207 1208 /* Maximum size for normal files. */ 1209 sbi->maxbytes = (clusters << cluster_bits) - 1; 1210 1211 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 1212 if (clusters >= (1ull << (64 - cluster_bits))) 1213 sbi->maxbytes = -1; 1214 sbi->maxbytes_sparse = MAX_LFS_FILESIZE; 1215 sb->s_maxbytes = MAX_LFS_FILESIZE; 1216 #else 1217 /* Maximum size for sparse file. */ 1218 sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1; 1219 sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits; 1220 #endif 1221 1222 /* 1223 * Compute the MFT zone at two steps. 1224 * It would be nice if we are able to allocate 1/8 of 1225 * total clusters for MFT but not more then 512 MB. 1226 */ 1227 sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3); 1228 1229 err = 0; 1230 1231 if (bh->b_blocknr && !sb_rdonly(sb)) { 1232 /* 1233 * Alternative boot is ok but primary is not ok. 1234 * Do not update primary boot here 'cause it may be faked boot. 1235 * Let ntfs to be mounted and update boot later. 1236 */ 1237 *boot2 = kmemdup(boot, sizeof(*boot), GFP_NOFS | __GFP_NOWARN); 1238 } 1239 1240 out: 1241 brelse(bh); 1242 1243 if (err == -EINVAL && !boot_block && dev_size0 > PAGE_SHIFT) { 1244 u32 block_size = min_t(u32, sector_size, PAGE_SIZE); 1245 u64 lbo = dev_size0 - sizeof(*boot); 1246 1247 boot_block = lbo >> blksize_bits(block_size); 1248 boot_off = lbo & (block_size - 1); 1249 if (boot_block && block_size >= boot_off + sizeof(*boot)) { 1250 /* 1251 * Try alternative boot (last sector) 1252 */ 1253 if (!sb_set_blocksize(sb, block_size)) 1254 return -EINVAL; 1255 hint = "Alternative boot"; 1256 dev_size = dev_size0; /* restore original size. */ 1257 goto read_boot; 1258 } 1259 } 1260 1261 return err; 1262 } 1263 1264 /* 1265 * ntfs_fill_super - Try to mount. 1266 */ 1267 static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) 1268 { 1269 int err; 1270 struct ntfs_sb_info *sbi = sb->s_fs_info; 1271 struct block_device *bdev = sb->s_bdev; 1272 struct ntfs_mount_options *fc_opts; 1273 struct ntfs_mount_options *options = NULL; 1274 struct inode *inode; 1275 struct ntfs_inode *ni; 1276 size_t i, tt, bad_len, bad_frags; 1277 CLST vcn, lcn, len; 1278 struct ATTRIB *attr; 1279 const struct VOLUME_INFO *info; 1280 u32 done, bytes; 1281 struct ATTR_DEF_ENTRY *t; 1282 u16 *shared; 1283 struct MFT_REF ref; 1284 bool ro = sb_rdonly(sb); 1285 struct NTFS_BOOT *boot2 = NULL; 1286 1287 ref.high = 0; 1288 1289 sbi->sb = sb; 1290 fc_opts = fc->fs_private; 1291 if (!fc_opts) { 1292 errorf(fc, "missing mount options"); 1293 return -EINVAL; 1294 } 1295 options = kmemdup(fc_opts, sizeof(*fc_opts), GFP_KERNEL); 1296 if (!options) 1297 return -ENOMEM; 1298 1299 if (fc_opts->nls_name) { 1300 options->nls_name = kstrdup(fc_opts->nls_name, GFP_KERNEL); 1301 if (!options->nls_name) { 1302 kfree(options); 1303 return -ENOMEM; 1304 } 1305 } 1306 sbi->options = options; 1307 sb->s_flags |= SB_NODIRATIME; 1308 sb->s_magic = 0x7366746e; // "ntfs" 1309 sb->s_op = &ntfs_sops; 1310 sb->s_export_op = &ntfs_export_ops; 1311 sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec 1312 sb->s_xattr = ntfs_xattr_handlers; 1313 set_default_d_op(sb, options->nocase ? &ntfs_dentry_ops : NULL); 1314 1315 options->nls = ntfs_load_nls(options->nls_name); 1316 if (IS_ERR(options->nls)) { 1317 options->nls = NULL; 1318 errorf(fc, "Cannot load nls %s", options->nls_name); 1319 err = -EINVAL; 1320 goto out; 1321 } 1322 1323 if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) { 1324 sbi->discard_granularity = bdev_discard_granularity(bdev); 1325 sbi->discard_granularity_mask_inv = 1326 ~(u64)(sbi->discard_granularity - 1); 1327 } 1328 1329 /* Parse boot. */ 1330 err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev), 1331 bdev_nr_bytes(bdev), &boot2); 1332 if (err) 1333 goto out; 1334 1335 /* 1336 * Load $Volume. This should be done before $LogFile 1337 * 'cause 'sbi->volume.ni' is used in 'ntfs_set_state'. 1338 */ 1339 ref.low = cpu_to_le32(MFT_REC_VOL); 1340 ref.seq = cpu_to_le16(MFT_REC_VOL); 1341 inode = ntfs_iget5(sb, &ref, &NAME_VOLUME); 1342 if (IS_ERR(inode)) { 1343 err = PTR_ERR(inode); 1344 ntfs_err(sb, "Failed to load $Volume (%d).", err); 1345 goto out; 1346 } 1347 1348 ni = ntfs_i(inode); 1349 1350 /* Load and save label (not necessary). */ 1351 attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL); 1352 1353 if (!attr) { 1354 /* It is ok if no ATTR_LABEL */ 1355 } else if (!attr->non_res && !is_attr_ext(attr)) { 1356 /* $AttrDef allows labels to be up to 128 symbols. */ 1357 err = utf16s_to_utf8s(resident_data(attr), 1358 le32_to_cpu(attr->res.data_size) >> 1, 1359 UTF16_LITTLE_ENDIAN, sbi->volume.label, 1360 sizeof(sbi->volume.label)); 1361 if (err < 0) { 1362 sbi->volume.label[0] = 0; 1363 } else if (err >= sizeof(sbi->volume.label)) { 1364 sbi->volume.label[sizeof(sbi->volume.label) - 1] = 0; 1365 } else { 1366 sbi->volume.label[err] = 0; 1367 } 1368 } else { 1369 /* Should we break mounting here? */ 1370 //err = -EINVAL; 1371 //goto put_inode_out; 1372 } 1373 1374 attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL); 1375 if (!attr || is_attr_ext(attr) || 1376 !(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) { 1377 ntfs_err(sb, "$Volume is corrupted."); 1378 err = -EINVAL; 1379 goto put_inode_out; 1380 } 1381 1382 sbi->volume.major_ver = info->major_ver; 1383 sbi->volume.minor_ver = info->minor_ver; 1384 sbi->volume.flags = info->flags; 1385 sbi->volume.ni = ni; 1386 if (info->flags & VOLUME_FLAG_DIRTY) { 1387 sbi->volume.real_dirty = true; 1388 ntfs_info(sb, "It is recommended to use chkdsk."); 1389 } 1390 1391 /* Load $MFTMirr to estimate recs_mirr. */ 1392 ref.low = cpu_to_le32(MFT_REC_MIRR); 1393 ref.seq = cpu_to_le16(MFT_REC_MIRR); 1394 inode = ntfs_iget5(sb, &ref, &NAME_MIRROR); 1395 if (IS_ERR(inode)) { 1396 err = PTR_ERR(inode); 1397 ntfs_err(sb, "Failed to load $MFTMirr (%d).", err); 1398 goto out; 1399 } 1400 1401 sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >> 1402 sbi->record_bits; 1403 1404 iput(inode); 1405 1406 /* Load LogFile to replay. */ 1407 ref.low = cpu_to_le32(MFT_REC_LOG); 1408 ref.seq = cpu_to_le16(MFT_REC_LOG); 1409 inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); 1410 if (IS_ERR(inode)) { 1411 err = PTR_ERR(inode); 1412 ntfs_err(sb, "Failed to load \x24LogFile (%d).", err); 1413 goto out; 1414 } 1415 1416 ni = ntfs_i(inode); 1417 1418 err = ntfs_loadlog_and_replay(ni, sbi); 1419 if (err) 1420 goto put_inode_out; 1421 1422 iput(inode); 1423 1424 if ((sbi->flags & NTFS_FLAGS_NEED_REPLAY) && !ro) { 1425 ntfs_warn(sb, "failed to replay log file. Can't mount rw!"); 1426 err = -EINVAL; 1427 goto out; 1428 } 1429 1430 if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !options->force) { 1431 ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!"); 1432 err = -EINVAL; 1433 goto out; 1434 } 1435 1436 /* Load $MFT. */ 1437 ref.low = cpu_to_le32(MFT_REC_MFT); 1438 ref.seq = cpu_to_le16(1); 1439 1440 inode = ntfs_iget5(sb, &ref, &NAME_MFT); 1441 if (IS_ERR(inode)) { 1442 err = PTR_ERR(inode); 1443 ntfs_err(sb, "Failed to load $MFT (%d).", err); 1444 goto out; 1445 } 1446 1447 ni = ntfs_i(inode); 1448 1449 sbi->mft.used = ni->i_valid >> sbi->record_bits; 1450 tt = inode->i_size >> sbi->record_bits; 1451 sbi->mft.next_free = MFT_REC_USER; 1452 1453 err = ni_load_all_mi(ni); 1454 if (err) { 1455 ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err); 1456 goto put_inode_out; 1457 } 1458 1459 /* Merge MFT bitmap runs from extent records loaded by ni_load_all_mi. */ 1460 { 1461 struct ATTRIB *a = NULL; 1462 struct ATTR_LIST_ENTRY *le = NULL; 1463 1464 while ((a = ni_enum_attr_ex(ni, a, &le, NULL))) { 1465 CLST svcn, evcn; 1466 u16 roff; 1467 1468 if (a->type != ATTR_BITMAP || !a->non_res) 1469 continue; 1470 1471 svcn = le64_to_cpu(a->nres.svcn); 1472 if (!svcn) 1473 continue; /* Base record runs already loaded. */ 1474 1475 evcn = le64_to_cpu(a->nres.evcn); 1476 roff = le16_to_cpu(a->nres.run_off); 1477 1478 err = run_unpack_ex(&sbi->mft.bitmap.run, sbi, 1479 MFT_REC_MFT, svcn, evcn, svcn, 1480 Add2Ptr(a, roff), 1481 le32_to_cpu(a->size) - roff); 1482 if (err < 0) { 1483 ntfs_err( 1484 sb, 1485 "Failed to unpack $MFT bitmap extent (%d).", 1486 err); 1487 goto put_inode_out; 1488 } 1489 err = 0; 1490 } 1491 } 1492 1493 err = wnd_init(&sbi->mft.bitmap, sb, tt); 1494 if (err) 1495 goto put_inode_out; 1496 1497 sbi->mft.ni = ni; 1498 1499 /* Load $Bitmap. */ 1500 ref.low = cpu_to_le32(MFT_REC_BITMAP); 1501 ref.seq = cpu_to_le16(MFT_REC_BITMAP); 1502 inode = ntfs_iget5(sb, &ref, &NAME_BITMAP); 1503 if (IS_ERR(inode)) { 1504 err = PTR_ERR(inode); 1505 ntfs_err(sb, "Failed to load $Bitmap (%d).", err); 1506 goto out; 1507 } 1508 1509 #ifndef CONFIG_NTFS3_64BIT_CLUSTER 1510 if (inode->i_size >> 32) { 1511 err = -EINVAL; 1512 goto put_inode_out; 1513 } 1514 #endif 1515 1516 /* Check bitmap boundary. */ 1517 tt = sbi->used.bitmap.nbits; 1518 if (inode->i_size < ntfs3_bitmap_size(tt)) { 1519 ntfs_err(sb, "$Bitmap is corrupted."); 1520 err = -EINVAL; 1521 goto put_inode_out; 1522 } 1523 1524 err = wnd_init(&sbi->used.bitmap, sb, tt); 1525 if (err) { 1526 ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err); 1527 goto put_inode_out; 1528 } 1529 1530 iput(inode); 1531 1532 /* Compute the MFT zone. */ 1533 err = ntfs_refresh_zone(sbi); 1534 if (err) { 1535 ntfs_err(sb, "Failed to initialize MFT zone (%d).", err); 1536 goto out; 1537 } 1538 1539 /* Load $BadClus. */ 1540 ref.low = cpu_to_le32(MFT_REC_BADCLUST); 1541 ref.seq = cpu_to_le16(MFT_REC_BADCLUST); 1542 inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS); 1543 if (IS_ERR(inode)) { 1544 err = PTR_ERR(inode); 1545 ntfs_err(sb, "Failed to load $BadClus (%d).", err); 1546 goto out; 1547 } 1548 1549 ni = ntfs_i(inode); 1550 bad_len = bad_frags = 0; 1551 for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) { 1552 if (lcn == SPARSE_LCN) 1553 continue; 1554 1555 bad_len += len; 1556 bad_frags += 1; 1557 if (ro) 1558 continue; 1559 1560 if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) { 1561 /* Bad blocks marked as free in bitmap. */ 1562 ntfs_set_state(sbi, NTFS_DIRTY_ERROR); 1563 } 1564 } 1565 if (bad_len) { 1566 /* 1567 * Notice about bad blocks. 1568 * In normal cases these blocks are marked as used in bitmap. 1569 * And we never allocate space in it. 1570 */ 1571 ntfs_notice(sb, 1572 "Volume contains %zu bad blocks in %zu fragments.", 1573 bad_len, bad_frags); 1574 } 1575 iput(inode); 1576 1577 /* Load $AttrDef. */ 1578 ref.low = cpu_to_le32(MFT_REC_ATTR); 1579 ref.seq = cpu_to_le16(MFT_REC_ATTR); 1580 inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF); 1581 if (IS_ERR(inode)) { 1582 err = PTR_ERR(inode); 1583 ntfs_err(sb, "Failed to load $AttrDef (%d)", err); 1584 goto out; 1585 } 1586 1587 /* 1588 * Typical $AttrDef contains up to 20 entries. 1589 * Check for extremely large/small size. 1590 */ 1591 if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) || 1592 inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) { 1593 ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).", 1594 inode->i_size); 1595 err = -EINVAL; 1596 goto put_inode_out; 1597 } 1598 1599 bytes = inode->i_size; 1600 sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL); 1601 if (!t) { 1602 err = -ENOMEM; 1603 goto put_inode_out; 1604 } 1605 1606 /* Read the entire file. */ 1607 err = inode_read_data(inode, sbi->def_table, bytes); 1608 if (err) { 1609 ntfs_err(sb, "Failed to read $AttrDef (%d).", err); 1610 goto put_inode_out; 1611 } 1612 1613 if (ATTR_STD != t->type) { 1614 ntfs_err(sb, "$AttrDef is corrupted."); 1615 err = -EINVAL; 1616 goto put_inode_out; 1617 } 1618 1619 t += 1; 1620 sbi->def_entries = 1; 1621 done = sizeof(struct ATTR_DEF_ENTRY); 1622 1623 while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) { 1624 u32 t32 = le32_to_cpu(t->type); 1625 u64 sz = le64_to_cpu(t->max_sz); 1626 1627 if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32) 1628 break; 1629 1630 if (t->type == ATTR_REPARSE) 1631 sbi->reparse.max_size = sz; 1632 else if (t->type == ATTR_EA) 1633 sbi->ea_max_size = sz; 1634 1635 done += sizeof(struct ATTR_DEF_ENTRY); 1636 t += 1; 1637 sbi->def_entries += 1; 1638 } 1639 iput(inode); 1640 1641 /* Load $UpCase. */ 1642 ref.low = cpu_to_le32(MFT_REC_UPCASE); 1643 ref.seq = cpu_to_le16(MFT_REC_UPCASE); 1644 inode = ntfs_iget5(sb, &ref, &NAME_UPCASE); 1645 if (IS_ERR(inode)) { 1646 err = PTR_ERR(inode); 1647 ntfs_err(sb, "Failed to load $UpCase (%d).", err); 1648 goto out; 1649 } 1650 1651 if (inode->i_size != 0x10000 * sizeof(short)) { 1652 err = -EINVAL; 1653 ntfs_err(sb, "$UpCase is corrupted."); 1654 goto put_inode_out; 1655 } 1656 1657 /* Read the entire file. */ 1658 err = inode_read_data(inode, sbi->upcase, 0x10000 * sizeof(short)); 1659 if (err) { 1660 ntfs_err(sb, "Failed to read $UpCase (%d).", err); 1661 goto put_inode_out; 1662 } 1663 1664 #ifdef __BIG_ENDIAN 1665 { 1666 u16 *dst = sbi->upcase; 1667 1668 for (i = 0; i < 0x10000; i++) 1669 __swab16s(dst++); 1670 } 1671 #endif 1672 1673 shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short)); 1674 if (shared && sbi->upcase != shared) { 1675 kvfree(sbi->upcase); 1676 sbi->upcase = shared; 1677 } 1678 1679 iput(inode); 1680 1681 if (is_ntfs3(sbi)) { 1682 /* Load $Secure. */ 1683 err = ntfs_security_init(sbi); 1684 if (err) { 1685 ntfs_err(sb, "Failed to initialize $Secure (%d).", err); 1686 goto out; 1687 } 1688 1689 /* Load $Extend. */ 1690 err = ntfs_extend_init(sbi); 1691 if (err) { 1692 ntfs_warn(sb, "Failed to initialize $Extend."); 1693 goto load_root; 1694 } 1695 1696 /* Load $Extend/$Reparse. */ 1697 err = ntfs_reparse_init(sbi); 1698 if (err) { 1699 ntfs_warn(sb, "Failed to initialize $Extend/$Reparse."); 1700 goto load_root; 1701 } 1702 1703 /* Load $Extend/$ObjId. */ 1704 err = ntfs_objid_init(sbi); 1705 if (err) { 1706 ntfs_warn(sb, "Failed to initialize $Extend/$ObjId."); 1707 goto load_root; 1708 } 1709 } 1710 1711 load_root: 1712 /* Load root. */ 1713 ref.low = cpu_to_le32(MFT_REC_ROOT); 1714 ref.seq = cpu_to_le16(MFT_REC_ROOT); 1715 inode = ntfs_iget5(sb, &ref, &NAME_ROOT); 1716 if (IS_ERR(inode)) { 1717 err = PTR_ERR(inode); 1718 ntfs_err(sb, "Failed to load root (%d).", err); 1719 goto out; 1720 } 1721 1722 /* 1723 * Final check. Looks like this case should never occurs. 1724 */ 1725 if (!inode->i_op) { 1726 err = -EINVAL; 1727 ntfs_err(sb, "Failed to load root (%d).", err); 1728 goto put_inode_out; 1729 } 1730 1731 sb->s_root = d_make_root(inode); 1732 if (!sb->s_root) { 1733 err = -ENOMEM; 1734 goto out; 1735 } 1736 1737 if (boot2) { 1738 /* 1739 * Alternative boot is ok but primary is not ok. 1740 * Volume is recognized as NTFS. Update primary boot. 1741 */ 1742 struct buffer_head *bh0 = sb_getblk(sb, 0); 1743 if (bh0) { 1744 wait_on_buffer(bh0); 1745 lock_buffer(bh0); 1746 memcpy(bh0->b_data, boot2, sizeof(*boot2)); 1747 set_buffer_uptodate(bh0); 1748 mark_buffer_dirty(bh0); 1749 unlock_buffer(bh0); 1750 if (!sync_dirty_buffer(bh0)) 1751 ntfs_warn(sb, "primary boot is updated"); 1752 put_bh(bh0); 1753 } 1754 1755 kfree(boot2); 1756 } 1757 1758 ntfs_create_procdir(sb); 1759 1760 return 0; 1761 1762 put_inode_out: 1763 iput(inode); 1764 out: 1765 /* sbi->options == options */ 1766 if (options) { 1767 put_mount_options(sbi->options); 1768 sbi->options = NULL; 1769 } 1770 1771 ntfs3_put_sbi(sbi); 1772 kfree(boot2); 1773 return err; 1774 } 1775 1776 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len) 1777 { 1778 struct ntfs_sb_info *sbi = sb->s_fs_info; 1779 struct block_device *bdev = sb->s_bdev; 1780 sector_t devblock = (u64)lcn * sbi->blocks_per_cluster; 1781 unsigned long blocks = (u64)len * sbi->blocks_per_cluster; 1782 unsigned long cnt = 0; 1783 unsigned long limit = global_zone_page_state(NR_FREE_PAGES) 1784 << (PAGE_SHIFT - sb->s_blocksize_bits); 1785 1786 if (limit >= 0x2000) 1787 limit -= 0x1000; 1788 else if (limit < 32) 1789 limit = 32; 1790 else 1791 limit >>= 1; 1792 1793 while (blocks--) { 1794 clean_bdev_aliases(bdev, devblock++, 1); 1795 if (cnt++ >= limit) { 1796 sync_blockdev(bdev); 1797 cnt = 0; 1798 } 1799 } 1800 } 1801 1802 /* 1803 * ntfs_discard - Issue a discard request (trim for SSD). 1804 */ 1805 int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len) 1806 { 1807 int err; 1808 u64 lbo, bytes, start, end; 1809 struct super_block *sb; 1810 1811 if (sbi->used.next_free_lcn == lcn + len) 1812 sbi->used.next_free_lcn = lcn; 1813 1814 if (sbi->flags & NTFS_FLAGS_NODISCARD) 1815 return -EOPNOTSUPP; 1816 1817 if (!sbi->options->discard) 1818 return -EOPNOTSUPP; 1819 1820 lbo = (u64)lcn << sbi->cluster_bits; 1821 bytes = (u64)len << sbi->cluster_bits; 1822 1823 /* Align up 'start' on discard_granularity. */ 1824 start = (lbo + sbi->discard_granularity - 1) & 1825 sbi->discard_granularity_mask_inv; 1826 /* Align down 'end' on discard_granularity. */ 1827 end = (lbo + bytes) & sbi->discard_granularity_mask_inv; 1828 1829 sb = sbi->sb; 1830 if (start >= end) 1831 return 0; 1832 1833 err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9, 1834 GFP_NOFS); 1835 1836 if (err == -EOPNOTSUPP) 1837 sbi->flags |= NTFS_FLAGS_NODISCARD; 1838 1839 return err; 1840 } 1841 1842 static int ntfs_fs_get_tree(struct fs_context *fc) 1843 { 1844 return get_tree_bdev(fc, ntfs_fill_super); 1845 } 1846 1847 /* 1848 * ntfs_fs_free - Free fs_context. 1849 * 1850 * Note that this will be called after fill_super and reconfigure 1851 * even when they pass. So they have to take pointers if they pass. 1852 */ 1853 static void ntfs_fs_free(struct fs_context *fc) 1854 { 1855 struct ntfs_mount_options *opts = fc->fs_private; 1856 struct ntfs_sb_info *sbi = fc->s_fs_info; 1857 1858 if (sbi) { 1859 ntfs3_put_sbi(sbi); 1860 ntfs3_free_sbi(sbi); 1861 } 1862 1863 if (opts) 1864 put_mount_options(opts); 1865 } 1866 1867 // clang-format off 1868 static const struct fs_context_operations ntfs_context_ops = { 1869 .parse_param = ntfs_fs_parse_param, 1870 .get_tree = ntfs_fs_get_tree, 1871 .reconfigure = ntfs_fs_reconfigure, 1872 .free = ntfs_fs_free, 1873 }; 1874 // clang-format on 1875 1876 /* 1877 * ntfs_init_fs_context - Initialize sbi and opts 1878 * 1879 * This will called when mount/remount. We will first initialize 1880 * options so that if remount we can use just that. 1881 */ 1882 static int ntfs_init_fs_context(struct fs_context *fc) 1883 { 1884 struct ntfs_mount_options *opts; 1885 struct ntfs_sb_info *sbi; 1886 1887 opts = kzalloc_obj(struct ntfs_mount_options, GFP_NOFS); 1888 if (!opts) 1889 return -ENOMEM; 1890 1891 /* Default options. */ 1892 opts->fs_uid = current_uid(); 1893 opts->fs_gid = current_gid(); 1894 opts->fs_fmask_inv = opts->fs_dmask_inv = ~current_umask(); 1895 opts->prealloc = 1; 1896 opts->ads = 1; 1897 1898 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 1899 /* Set the default value 'acl' */ 1900 fc->sb_flags |= SB_POSIXACL; 1901 #endif 1902 1903 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) 1904 goto ok; 1905 1906 sbi = kzalloc_obj(struct ntfs_sb_info, GFP_NOFS); 1907 if (!sbi) 1908 goto free_opts; 1909 1910 sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL); 1911 if (!sbi->upcase) 1912 goto free_sbi; 1913 1914 ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL, 1915 DEFAULT_RATELIMIT_BURST); 1916 1917 mutex_init(&sbi->compress.mtx_lznt); 1918 #ifdef CONFIG_NTFS3_LZX_XPRESS 1919 mutex_init(&sbi->compress.mtx_xpress); 1920 mutex_init(&sbi->compress.mtx_lzx); 1921 #endif 1922 1923 fc->s_fs_info = sbi; 1924 ok: 1925 fc->fs_private = opts; 1926 fc->ops = &ntfs_context_ops; 1927 1928 return 0; 1929 free_sbi: 1930 kfree(sbi); 1931 free_opts: 1932 kfree(opts); 1933 return -ENOMEM; 1934 } 1935 1936 static void ntfs3_kill_sb(struct super_block *sb) 1937 { 1938 struct ntfs_sb_info *sbi = sb->s_fs_info; 1939 1940 kill_block_super(sb); 1941 1942 if (sbi->options) 1943 put_mount_options(sbi->options); 1944 ntfs3_free_sbi(sbi); 1945 } 1946 1947 // clang-format off 1948 static struct file_system_type ntfs_fs_type = { 1949 .owner = THIS_MODULE, 1950 .name = "ntfs3", 1951 .init_fs_context = ntfs_init_fs_context, 1952 .parameters = ntfs_fs_parameters, 1953 .kill_sb = ntfs3_kill_sb, 1954 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 1955 }; 1956 // clang-format on 1957 1958 static int __init init_ntfs_fs(void) 1959 { 1960 int err; 1961 1962 if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL)) 1963 pr_info("ntfs3: Enabled Linux POSIX ACLs support\n"); 1964 if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER)) 1965 pr_notice( 1966 "ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n"); 1967 if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS)) 1968 pr_info("ntfs3: Read-only LZX/Xpress compression included\n"); 1969 1970 ntfs_create_proc_root(); 1971 1972 err = ntfs3_init_bitmap(); 1973 if (err) 1974 goto out2; 1975 1976 ntfs_inode_cachep = kmem_cache_create( 1977 "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, 1978 (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), init_once); 1979 if (!ntfs_inode_cachep) { 1980 err = -ENOMEM; 1981 goto out1; 1982 } 1983 1984 err = register_filesystem(&ntfs_fs_type); 1985 if (err) 1986 goto out; 1987 1988 return 0; 1989 out: 1990 kmem_cache_destroy(ntfs_inode_cachep); 1991 out1: 1992 ntfs3_exit_bitmap(); 1993 out2: 1994 ntfs_remove_proc_root(); 1995 return err; 1996 } 1997 1998 static void __exit exit_ntfs_fs(void) 1999 { 2000 rcu_barrier(); 2001 kmem_cache_destroy(ntfs_inode_cachep); 2002 unregister_filesystem(&ntfs_fs_type); 2003 ntfs3_exit_bitmap(); 2004 ntfs_remove_proc_root(); 2005 } 2006 2007 MODULE_LICENSE("GPL"); 2008 MODULE_DESCRIPTION("ntfs3 read/write filesystem"); 2009 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 2010 MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support"); 2011 #endif 2012 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 2013 MODULE_INFO( 2014 cluster, 2015 "Warning: Activated 64 bits per cluster. Windows does not support this"); 2016 #endif 2017 #ifdef CONFIG_NTFS3_LZX_XPRESS 2018 MODULE_INFO(compression, "Read-only lzx/xpress compression included"); 2019 #endif 2020 2021 MODULE_AUTHOR("Konstantin Komarov"); 2022 MODULE_ALIAS_FS("ntfs3"); 2023 2024 module_init(init_ntfs_fs); 2025 module_exit(exit_ntfs_fs); 2026