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