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 if (!sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE))) { 1178 err = -EINVAL; 1179 goto out; 1180 } 1181 1182 sbi->block_mask = sb->s_blocksize - 1; 1183 sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits; 1184 sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits; 1185 1186 /* Maximum size for normal files. */ 1187 sbi->maxbytes = (clusters << cluster_bits) - 1; 1188 1189 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 1190 if (clusters >= (1ull << (64 - cluster_bits))) 1191 sbi->maxbytes = -1; 1192 sbi->maxbytes_sparse = -1; 1193 sb->s_maxbytes = MAX_LFS_FILESIZE; 1194 #else 1195 /* Maximum size for sparse file. */ 1196 sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1; 1197 sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits; 1198 #endif 1199 1200 /* 1201 * Compute the MFT zone at two steps. 1202 * It would be nice if we are able to allocate 1/8 of 1203 * total clusters for MFT but not more then 512 MB. 1204 */ 1205 sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3); 1206 1207 err = 0; 1208 1209 if (bh->b_blocknr && !sb_rdonly(sb)) { 1210 /* 1211 * Alternative boot is ok but primary is not ok. 1212 * Do not update primary boot here 'cause it may be faked boot. 1213 * Let ntfs to be mounted and update boot later. 1214 */ 1215 *boot2 = kmemdup(boot, sizeof(*boot), GFP_NOFS | __GFP_NOWARN); 1216 } 1217 1218 out: 1219 brelse(bh); 1220 1221 if (err == -EINVAL && !boot_block && dev_size0 > PAGE_SHIFT) { 1222 u32 block_size = min_t(u32, sector_size, PAGE_SIZE); 1223 u64 lbo = dev_size0 - sizeof(*boot); 1224 1225 boot_block = lbo >> blksize_bits(block_size); 1226 boot_off = lbo & (block_size - 1); 1227 if (boot_block && block_size >= boot_off + sizeof(*boot)) { 1228 /* 1229 * Try alternative boot (last sector) 1230 */ 1231 if (!sb_set_blocksize(sb, block_size)) 1232 return -EINVAL; 1233 hint = "Alternative boot"; 1234 dev_size = dev_size0; /* restore original size. */ 1235 goto read_boot; 1236 } 1237 } 1238 1239 return err; 1240 } 1241 1242 /* 1243 * ntfs_fill_super - Try to mount. 1244 */ 1245 static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) 1246 { 1247 int err; 1248 struct ntfs_sb_info *sbi = sb->s_fs_info; 1249 struct block_device *bdev = sb->s_bdev; 1250 struct ntfs_mount_options *fc_opts; 1251 struct ntfs_mount_options *options = NULL; 1252 struct inode *inode; 1253 struct ntfs_inode *ni; 1254 size_t i, tt, bad_len, bad_frags; 1255 CLST vcn, lcn, len; 1256 struct ATTRIB *attr; 1257 const struct VOLUME_INFO *info; 1258 u32 done, bytes; 1259 struct ATTR_DEF_ENTRY *t; 1260 u16 *shared; 1261 struct MFT_REF ref; 1262 bool ro = sb_rdonly(sb); 1263 struct NTFS_BOOT *boot2 = NULL; 1264 1265 ref.high = 0; 1266 1267 sbi->sb = sb; 1268 fc_opts = fc->fs_private; 1269 if (!fc_opts) { 1270 errorf(fc, "missing mount options"); 1271 return -EINVAL; 1272 } 1273 options = kmemdup(fc_opts, sizeof(*fc_opts), GFP_KERNEL); 1274 if (!options) 1275 return -ENOMEM; 1276 1277 if (fc_opts->nls_name) { 1278 options->nls_name = kstrdup(fc_opts->nls_name, GFP_KERNEL); 1279 if (!options->nls_name) { 1280 kfree(options); 1281 return -ENOMEM; 1282 } 1283 } 1284 sbi->options = options; 1285 sb->s_flags |= SB_NODIRATIME; 1286 sb->s_magic = 0x7366746e; // "ntfs" 1287 sb->s_op = &ntfs_sops; 1288 sb->s_export_op = &ntfs_export_ops; 1289 sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec 1290 sb->s_xattr = ntfs_xattr_handlers; 1291 set_default_d_op(sb, options->nocase ? &ntfs_dentry_ops : NULL); 1292 1293 options->nls = ntfs_load_nls(options->nls_name); 1294 if (IS_ERR(options->nls)) { 1295 options->nls = NULL; 1296 errorf(fc, "Cannot load nls %s", options->nls_name); 1297 err = -EINVAL; 1298 goto out; 1299 } 1300 1301 if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) { 1302 sbi->discard_granularity = bdev_discard_granularity(bdev); 1303 sbi->discard_granularity_mask_inv = 1304 ~(u64)(sbi->discard_granularity - 1); 1305 } 1306 1307 /* Parse boot. */ 1308 err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev), 1309 bdev_nr_bytes(bdev), &boot2); 1310 if (err) 1311 goto out; 1312 1313 /* 1314 * Load $Volume. This should be done before $LogFile 1315 * 'cause 'sbi->volume.ni' is used in 'ntfs_set_state'. 1316 */ 1317 ref.low = cpu_to_le32(MFT_REC_VOL); 1318 ref.seq = cpu_to_le16(MFT_REC_VOL); 1319 inode = ntfs_iget5(sb, &ref, &NAME_VOLUME); 1320 if (IS_ERR(inode)) { 1321 err = PTR_ERR(inode); 1322 ntfs_err(sb, "Failed to load $Volume (%d).", err); 1323 goto out; 1324 } 1325 1326 ni = ntfs_i(inode); 1327 1328 /* Load and save label (not necessary). */ 1329 attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL); 1330 1331 if (!attr) { 1332 /* It is ok if no ATTR_LABEL */ 1333 } else if (!attr->non_res && !is_attr_ext(attr)) { 1334 /* $AttrDef allows labels to be up to 128 symbols. */ 1335 err = utf16s_to_utf8s(resident_data(attr), 1336 le32_to_cpu(attr->res.data_size) >> 1, 1337 UTF16_LITTLE_ENDIAN, sbi->volume.label, 1338 sizeof(sbi->volume.label)); 1339 if (err < 0) { 1340 sbi->volume.label[0] = 0; 1341 } else if (err >= sizeof(sbi->volume.label)) { 1342 sbi->volume.label[sizeof(sbi->volume.label) - 1] = 0; 1343 } else { 1344 sbi->volume.label[err] = 0; 1345 } 1346 } else { 1347 /* Should we break mounting here? */ 1348 //err = -EINVAL; 1349 //goto put_inode_out; 1350 } 1351 1352 attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL); 1353 if (!attr || is_attr_ext(attr) || 1354 !(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) { 1355 ntfs_err(sb, "$Volume is corrupted."); 1356 err = -EINVAL; 1357 goto put_inode_out; 1358 } 1359 1360 sbi->volume.major_ver = info->major_ver; 1361 sbi->volume.minor_ver = info->minor_ver; 1362 sbi->volume.flags = info->flags; 1363 sbi->volume.ni = ni; 1364 if (info->flags & VOLUME_FLAG_DIRTY) { 1365 sbi->volume.real_dirty = true; 1366 ntfs_info(sb, "It is recommended to use chkdsk."); 1367 } 1368 1369 /* Load $MFTMirr to estimate recs_mirr. */ 1370 ref.low = cpu_to_le32(MFT_REC_MIRR); 1371 ref.seq = cpu_to_le16(MFT_REC_MIRR); 1372 inode = ntfs_iget5(sb, &ref, &NAME_MIRROR); 1373 if (IS_ERR(inode)) { 1374 err = PTR_ERR(inode); 1375 ntfs_err(sb, "Failed to load $MFTMirr (%d).", err); 1376 goto out; 1377 } 1378 1379 sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >> 1380 sbi->record_bits; 1381 1382 iput(inode); 1383 1384 /* Load LogFile to replay. */ 1385 ref.low = cpu_to_le32(MFT_REC_LOG); 1386 ref.seq = cpu_to_le16(MFT_REC_LOG); 1387 inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); 1388 if (IS_ERR(inode)) { 1389 err = PTR_ERR(inode); 1390 ntfs_err(sb, "Failed to load \x24LogFile (%d).", err); 1391 goto out; 1392 } 1393 1394 ni = ntfs_i(inode); 1395 1396 err = ntfs_loadlog_and_replay(ni, sbi); 1397 if (err) 1398 goto put_inode_out; 1399 1400 iput(inode); 1401 1402 if ((sbi->flags & NTFS_FLAGS_NEED_REPLAY) && !ro) { 1403 ntfs_warn(sb, "failed to replay log file. Can't mount rw!"); 1404 err = -EINVAL; 1405 goto out; 1406 } 1407 1408 if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !options->force) { 1409 ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!"); 1410 err = -EINVAL; 1411 goto out; 1412 } 1413 1414 /* Load $MFT. */ 1415 ref.low = cpu_to_le32(MFT_REC_MFT); 1416 ref.seq = cpu_to_le16(1); 1417 1418 inode = ntfs_iget5(sb, &ref, &NAME_MFT); 1419 if (IS_ERR(inode)) { 1420 err = PTR_ERR(inode); 1421 ntfs_err(sb, "Failed to load $MFT (%d).", err); 1422 goto out; 1423 } 1424 1425 ni = ntfs_i(inode); 1426 1427 sbi->mft.used = ni->i_valid >> sbi->record_bits; 1428 tt = inode->i_size >> sbi->record_bits; 1429 sbi->mft.next_free = MFT_REC_USER; 1430 1431 err = ni_load_all_mi(ni); 1432 if (err) { 1433 ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err); 1434 goto put_inode_out; 1435 } 1436 1437 /* Merge MFT bitmap runs from extent records loaded by ni_load_all_mi. */ 1438 { 1439 struct ATTRIB *a = NULL; 1440 struct ATTR_LIST_ENTRY *le = NULL; 1441 1442 while ((a = ni_enum_attr_ex(ni, a, &le, NULL))) { 1443 CLST svcn, evcn; 1444 u16 roff; 1445 1446 if (a->type != ATTR_BITMAP || !a->non_res) 1447 continue; 1448 1449 svcn = le64_to_cpu(a->nres.svcn); 1450 if (!svcn) 1451 continue; /* Base record runs already loaded. */ 1452 1453 evcn = le64_to_cpu(a->nres.evcn); 1454 roff = le16_to_cpu(a->nres.run_off); 1455 1456 err = run_unpack_ex(&sbi->mft.bitmap.run, sbi, 1457 MFT_REC_MFT, svcn, evcn, svcn, 1458 Add2Ptr(a, roff), 1459 le32_to_cpu(a->size) - roff); 1460 if (err < 0) { 1461 ntfs_err(sb, "Failed to unpack $MFT bitmap extent (%d).", err); 1462 goto put_inode_out; 1463 } 1464 err = 0; 1465 } 1466 } 1467 1468 err = wnd_init(&sbi->mft.bitmap, sb, tt); 1469 if (err) 1470 goto put_inode_out; 1471 1472 sbi->mft.ni = ni; 1473 1474 /* Load $Bitmap. */ 1475 ref.low = cpu_to_le32(MFT_REC_BITMAP); 1476 ref.seq = cpu_to_le16(MFT_REC_BITMAP); 1477 inode = ntfs_iget5(sb, &ref, &NAME_BITMAP); 1478 if (IS_ERR(inode)) { 1479 err = PTR_ERR(inode); 1480 ntfs_err(sb, "Failed to load $Bitmap (%d).", err); 1481 goto out; 1482 } 1483 1484 #ifndef CONFIG_NTFS3_64BIT_CLUSTER 1485 if (inode->i_size >> 32) { 1486 err = -EINVAL; 1487 goto put_inode_out; 1488 } 1489 #endif 1490 1491 /* Check bitmap boundary. */ 1492 tt = sbi->used.bitmap.nbits; 1493 if (inode->i_size < ntfs3_bitmap_size(tt)) { 1494 ntfs_err(sb, "$Bitmap is corrupted."); 1495 err = -EINVAL; 1496 goto put_inode_out; 1497 } 1498 1499 err = wnd_init(&sbi->used.bitmap, sb, tt); 1500 if (err) { 1501 ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err); 1502 goto put_inode_out; 1503 } 1504 1505 iput(inode); 1506 1507 /* Compute the MFT zone. */ 1508 err = ntfs_refresh_zone(sbi); 1509 if (err) { 1510 ntfs_err(sb, "Failed to initialize MFT zone (%d).", err); 1511 goto out; 1512 } 1513 1514 /* Load $BadClus. */ 1515 ref.low = cpu_to_le32(MFT_REC_BADCLUST); 1516 ref.seq = cpu_to_le16(MFT_REC_BADCLUST); 1517 inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS); 1518 if (IS_ERR(inode)) { 1519 err = PTR_ERR(inode); 1520 ntfs_err(sb, "Failed to load $BadClus (%d).", err); 1521 goto out; 1522 } 1523 1524 ni = ntfs_i(inode); 1525 bad_len = bad_frags = 0; 1526 for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) { 1527 if (lcn == SPARSE_LCN) 1528 continue; 1529 1530 bad_len += len; 1531 bad_frags += 1; 1532 if (ro) 1533 continue; 1534 1535 if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) { 1536 /* Bad blocks marked as free in bitmap. */ 1537 ntfs_set_state(sbi, NTFS_DIRTY_ERROR); 1538 } 1539 } 1540 if (bad_len) { 1541 /* 1542 * Notice about bad blocks. 1543 * In normal cases these blocks are marked as used in bitmap. 1544 * And we never allocate space in it. 1545 */ 1546 ntfs_notice(sb, 1547 "Volume contains %zu bad blocks in %zu fragments.", 1548 bad_len, bad_frags); 1549 } 1550 iput(inode); 1551 1552 /* Load $AttrDef. */ 1553 ref.low = cpu_to_le32(MFT_REC_ATTR); 1554 ref.seq = cpu_to_le16(MFT_REC_ATTR); 1555 inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF); 1556 if (IS_ERR(inode)) { 1557 err = PTR_ERR(inode); 1558 ntfs_err(sb, "Failed to load $AttrDef (%d)", err); 1559 goto out; 1560 } 1561 1562 /* 1563 * Typical $AttrDef contains up to 20 entries. 1564 * Check for extremely large/small size. 1565 */ 1566 if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) || 1567 inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) { 1568 ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).", 1569 inode->i_size); 1570 err = -EINVAL; 1571 goto put_inode_out; 1572 } 1573 1574 bytes = inode->i_size; 1575 sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL); 1576 if (!t) { 1577 err = -ENOMEM; 1578 goto put_inode_out; 1579 } 1580 1581 /* Read the entire file. */ 1582 err = inode_read_data(inode, sbi->def_table, bytes); 1583 if (err) { 1584 ntfs_err(sb, "Failed to read $AttrDef (%d).", err); 1585 goto put_inode_out; 1586 } 1587 1588 if (ATTR_STD != t->type) { 1589 ntfs_err(sb, "$AttrDef is corrupted."); 1590 err = -EINVAL; 1591 goto put_inode_out; 1592 } 1593 1594 t += 1; 1595 sbi->def_entries = 1; 1596 done = sizeof(struct ATTR_DEF_ENTRY); 1597 1598 while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) { 1599 u32 t32 = le32_to_cpu(t->type); 1600 u64 sz = le64_to_cpu(t->max_sz); 1601 1602 if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32) 1603 break; 1604 1605 if (t->type == ATTR_REPARSE) 1606 sbi->reparse.max_size = sz; 1607 else if (t->type == ATTR_EA) 1608 sbi->ea_max_size = sz; 1609 1610 done += sizeof(struct ATTR_DEF_ENTRY); 1611 t += 1; 1612 sbi->def_entries += 1; 1613 } 1614 iput(inode); 1615 1616 /* Load $UpCase. */ 1617 ref.low = cpu_to_le32(MFT_REC_UPCASE); 1618 ref.seq = cpu_to_le16(MFT_REC_UPCASE); 1619 inode = ntfs_iget5(sb, &ref, &NAME_UPCASE); 1620 if (IS_ERR(inode)) { 1621 err = PTR_ERR(inode); 1622 ntfs_err(sb, "Failed to load $UpCase (%d).", err); 1623 goto out; 1624 } 1625 1626 if (inode->i_size != 0x10000 * sizeof(short)) { 1627 err = -EINVAL; 1628 ntfs_err(sb, "$UpCase is corrupted."); 1629 goto put_inode_out; 1630 } 1631 1632 /* Read the entire file. */ 1633 err = inode_read_data(inode, sbi->upcase, 0x10000 * sizeof(short)); 1634 if (err) { 1635 ntfs_err(sb, "Failed to read $UpCase (%d).", err); 1636 goto put_inode_out; 1637 } 1638 1639 #ifdef __BIG_ENDIAN 1640 { 1641 u16 *dst = sbi->upcase; 1642 1643 for (i = 0; i < 0x10000; i++) 1644 __swab16s(dst++); 1645 } 1646 #endif 1647 1648 shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short)); 1649 if (shared && sbi->upcase != shared) { 1650 kvfree(sbi->upcase); 1651 sbi->upcase = shared; 1652 } 1653 1654 iput(inode); 1655 1656 if (is_ntfs3(sbi)) { 1657 /* Load $Secure. */ 1658 err = ntfs_security_init(sbi); 1659 if (err) { 1660 ntfs_err(sb, "Failed to initialize $Secure (%d).", err); 1661 goto out; 1662 } 1663 1664 /* Load $Extend. */ 1665 err = ntfs_extend_init(sbi); 1666 if (err) { 1667 ntfs_warn(sb, "Failed to initialize $Extend."); 1668 goto load_root; 1669 } 1670 1671 /* Load $Extend/$Reparse. */ 1672 err = ntfs_reparse_init(sbi); 1673 if (err) { 1674 ntfs_warn(sb, "Failed to initialize $Extend/$Reparse."); 1675 goto load_root; 1676 } 1677 1678 /* Load $Extend/$ObjId. */ 1679 err = ntfs_objid_init(sbi); 1680 if (err) { 1681 ntfs_warn(sb, "Failed to initialize $Extend/$ObjId."); 1682 goto load_root; 1683 } 1684 } 1685 1686 load_root: 1687 /* Load root. */ 1688 ref.low = cpu_to_le32(MFT_REC_ROOT); 1689 ref.seq = cpu_to_le16(MFT_REC_ROOT); 1690 inode = ntfs_iget5(sb, &ref, &NAME_ROOT); 1691 if (IS_ERR(inode)) { 1692 err = PTR_ERR(inode); 1693 ntfs_err(sb, "Failed to load root (%d).", err); 1694 goto out; 1695 } 1696 1697 /* 1698 * Final check. Looks like this case should never occurs. 1699 */ 1700 if (!inode->i_op) { 1701 err = -EINVAL; 1702 ntfs_err(sb, "Failed to load root (%d).", err); 1703 goto put_inode_out; 1704 } 1705 1706 sb->s_root = d_make_root(inode); 1707 if (!sb->s_root) { 1708 err = -ENOMEM; 1709 goto out; 1710 } 1711 1712 if (boot2) { 1713 /* 1714 * Alternative boot is ok but primary is not ok. 1715 * Volume is recognized as NTFS. Update primary boot. 1716 */ 1717 struct buffer_head *bh0 = sb_getblk(sb, 0); 1718 if (bh0) { 1719 wait_on_buffer(bh0); 1720 lock_buffer(bh0); 1721 memcpy(bh0->b_data, boot2, sizeof(*boot2)); 1722 set_buffer_uptodate(bh0); 1723 mark_buffer_dirty(bh0); 1724 unlock_buffer(bh0); 1725 if (!sync_dirty_buffer(bh0)) 1726 ntfs_warn(sb, "primary boot is updated"); 1727 put_bh(bh0); 1728 } 1729 1730 kfree(boot2); 1731 } 1732 1733 ntfs_create_procdir(sb); 1734 1735 return 0; 1736 1737 put_inode_out: 1738 iput(inode); 1739 out: 1740 /* sbi->options == options */ 1741 if (options) { 1742 put_mount_options(sbi->options); 1743 sbi->options = NULL; 1744 } 1745 1746 ntfs3_put_sbi(sbi); 1747 kfree(boot2); 1748 return err; 1749 } 1750 1751 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len) 1752 { 1753 struct ntfs_sb_info *sbi = sb->s_fs_info; 1754 struct block_device *bdev = sb->s_bdev; 1755 sector_t devblock = (u64)lcn * sbi->blocks_per_cluster; 1756 unsigned long blocks = (u64)len * sbi->blocks_per_cluster; 1757 unsigned long cnt = 0; 1758 unsigned long limit = global_zone_page_state(NR_FREE_PAGES) 1759 << (PAGE_SHIFT - sb->s_blocksize_bits); 1760 1761 if (limit >= 0x2000) 1762 limit -= 0x1000; 1763 else if (limit < 32) 1764 limit = 32; 1765 else 1766 limit >>= 1; 1767 1768 while (blocks--) { 1769 clean_bdev_aliases(bdev, devblock++, 1); 1770 if (cnt++ >= limit) { 1771 sync_blockdev(bdev); 1772 cnt = 0; 1773 } 1774 } 1775 } 1776 1777 /* 1778 * ntfs_discard - Issue a discard request (trim for SSD). 1779 */ 1780 int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len) 1781 { 1782 int err; 1783 u64 lbo, bytes, start, end; 1784 struct super_block *sb; 1785 1786 if (sbi->used.next_free_lcn == lcn + len) 1787 sbi->used.next_free_lcn = lcn; 1788 1789 if (sbi->flags & NTFS_FLAGS_NODISCARD) 1790 return -EOPNOTSUPP; 1791 1792 if (!sbi->options->discard) 1793 return -EOPNOTSUPP; 1794 1795 lbo = (u64)lcn << sbi->cluster_bits; 1796 bytes = (u64)len << sbi->cluster_bits; 1797 1798 /* Align up 'start' on discard_granularity. */ 1799 start = (lbo + sbi->discard_granularity - 1) & 1800 sbi->discard_granularity_mask_inv; 1801 /* Align down 'end' on discard_granularity. */ 1802 end = (lbo + bytes) & sbi->discard_granularity_mask_inv; 1803 1804 sb = sbi->sb; 1805 if (start >= end) 1806 return 0; 1807 1808 err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9, 1809 GFP_NOFS); 1810 1811 if (err == -EOPNOTSUPP) 1812 sbi->flags |= NTFS_FLAGS_NODISCARD; 1813 1814 return err; 1815 } 1816 1817 static int ntfs_fs_get_tree(struct fs_context *fc) 1818 { 1819 return get_tree_bdev(fc, ntfs_fill_super); 1820 } 1821 1822 /* 1823 * ntfs_fs_free - Free fs_context. 1824 * 1825 * Note that this will be called after fill_super and reconfigure 1826 * even when they pass. So they have to take pointers if they pass. 1827 */ 1828 static void ntfs_fs_free(struct fs_context *fc) 1829 { 1830 struct ntfs_mount_options *opts = fc->fs_private; 1831 struct ntfs_sb_info *sbi = fc->s_fs_info; 1832 1833 if (sbi) { 1834 ntfs3_put_sbi(sbi); 1835 ntfs3_free_sbi(sbi); 1836 } 1837 1838 if (opts) 1839 put_mount_options(opts); 1840 } 1841 1842 // clang-format off 1843 static const struct fs_context_operations ntfs_context_ops = { 1844 .parse_param = ntfs_fs_parse_param, 1845 .get_tree = ntfs_fs_get_tree, 1846 .reconfigure = ntfs_fs_reconfigure, 1847 .free = ntfs_fs_free, 1848 }; 1849 // clang-format on 1850 1851 /* 1852 * ntfs_init_fs_context - Initialize sbi and opts 1853 * 1854 * This will called when mount/remount. We will first initialize 1855 * options so that if remount we can use just that. 1856 */ 1857 static int ntfs_init_fs_context(struct fs_context *fc) 1858 { 1859 struct ntfs_mount_options *opts; 1860 struct ntfs_sb_info *sbi; 1861 1862 opts = kzalloc_obj(struct ntfs_mount_options, GFP_NOFS); 1863 if (!opts) 1864 return -ENOMEM; 1865 1866 /* Default options. */ 1867 opts->fs_uid = current_uid(); 1868 opts->fs_gid = current_gid(); 1869 opts->fs_fmask_inv = ~current_umask(); 1870 opts->fs_dmask_inv = ~current_umask(); 1871 opts->prealloc = 1; 1872 1873 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 1874 /* Set the default value 'acl' */ 1875 fc->sb_flags |= SB_POSIXACL; 1876 #endif 1877 1878 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) 1879 goto ok; 1880 1881 sbi = kzalloc_obj(struct ntfs_sb_info, GFP_NOFS); 1882 if (!sbi) 1883 goto free_opts; 1884 1885 sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL); 1886 if (!sbi->upcase) 1887 goto free_sbi; 1888 1889 ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL, 1890 DEFAULT_RATELIMIT_BURST); 1891 1892 mutex_init(&sbi->compress.mtx_lznt); 1893 #ifdef CONFIG_NTFS3_LZX_XPRESS 1894 mutex_init(&sbi->compress.mtx_xpress); 1895 mutex_init(&sbi->compress.mtx_lzx); 1896 #endif 1897 1898 fc->s_fs_info = sbi; 1899 ok: 1900 fc->fs_private = opts; 1901 fc->ops = &ntfs_context_ops; 1902 1903 return 0; 1904 free_sbi: 1905 kfree(sbi); 1906 free_opts: 1907 kfree(opts); 1908 return -ENOMEM; 1909 } 1910 1911 static void ntfs3_kill_sb(struct super_block *sb) 1912 { 1913 struct ntfs_sb_info *sbi = sb->s_fs_info; 1914 1915 kill_block_super(sb); 1916 1917 if (sbi->options) 1918 put_mount_options(sbi->options); 1919 ntfs3_free_sbi(sbi); 1920 } 1921 1922 // clang-format off 1923 static struct file_system_type ntfs_fs_type = { 1924 .owner = THIS_MODULE, 1925 .name = "ntfs3", 1926 .init_fs_context = ntfs_init_fs_context, 1927 .parameters = ntfs_fs_parameters, 1928 .kill_sb = ntfs3_kill_sb, 1929 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 1930 }; 1931 1932 // clang-format on 1933 1934 static int __init init_ntfs_fs(void) 1935 { 1936 int err; 1937 1938 if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL)) 1939 pr_info("ntfs3: Enabled Linux POSIX ACLs support\n"); 1940 if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER)) 1941 pr_notice( 1942 "ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n"); 1943 if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS)) 1944 pr_info("ntfs3: Read-only LZX/Xpress compression included\n"); 1945 1946 ntfs_create_proc_root(); 1947 1948 err = ntfs3_init_bitmap(); 1949 if (err) 1950 goto out2; 1951 1952 ntfs_inode_cachep = kmem_cache_create( 1953 "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, 1954 (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), init_once); 1955 if (!ntfs_inode_cachep) { 1956 err = -ENOMEM; 1957 goto out1; 1958 } 1959 1960 err = register_filesystem(&ntfs_fs_type); 1961 if (err) 1962 goto out; 1963 1964 return 0; 1965 out: 1966 kmem_cache_destroy(ntfs_inode_cachep); 1967 out1: 1968 ntfs3_exit_bitmap(); 1969 out2: 1970 ntfs_remove_proc_root(); 1971 return err; 1972 } 1973 1974 static void __exit exit_ntfs_fs(void) 1975 { 1976 rcu_barrier(); 1977 kmem_cache_destroy(ntfs_inode_cachep); 1978 unregister_filesystem(&ntfs_fs_type); 1979 ntfs3_exit_bitmap(); 1980 ntfs_remove_proc_root(); 1981 } 1982 1983 MODULE_LICENSE("GPL"); 1984 MODULE_DESCRIPTION("ntfs3 read/write filesystem"); 1985 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 1986 MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support"); 1987 #endif 1988 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 1989 MODULE_INFO( 1990 cluster, 1991 "Warning: Activated 64 bits per cluster. Windows does not support this"); 1992 #endif 1993 #ifdef CONFIG_NTFS3_LZX_XPRESS 1994 MODULE_INFO(compression, "Read-only lzx/xpress compression included"); 1995 #endif 1996 1997 MODULE_AUTHOR("Konstantin Komarov"); 1998 MODULE_ALIAS_FS("ntfs3"); 1999 2000 module_init(init_ntfs_fs); 2001 module_exit(exit_ntfs_fs); 2002