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 * 20 * WSL - Windows Subsystem for Linux 21 * https://docs.microsoft.com/en-us/windows/wsl/file-permissions 22 * It stores uid/gid/mode/dev in xattr 23 * 24 */ 25 26 #include <linux/backing-dev.h> 27 #include <linux/blkdev.h> 28 #include <linux/buffer_head.h> 29 #include <linux/exportfs.h> 30 #include <linux/fs.h> 31 #include <linux/iversion.h> 32 #include <linux/module.h> 33 #include <linux/nls.h> 34 #include <linux/parser.h> 35 #include <linux/seq_file.h> 36 #include <linux/statfs.h> 37 38 #include "debug.h" 39 #include "ntfs.h" 40 #include "ntfs_fs.h" 41 #ifdef CONFIG_NTFS3_LZX_XPRESS 42 #include "lib/lib.h" 43 #endif 44 45 #ifdef CONFIG_PRINTK 46 /* 47 * Trace warnings/notices/errors 48 * Thanks Joe Perches <joe@perches.com> for implementation 49 */ 50 void ntfs_printk(const struct super_block *sb, const char *fmt, ...) 51 { 52 struct va_format vaf; 53 va_list args; 54 int level; 55 struct ntfs_sb_info *sbi = sb->s_fs_info; 56 57 /*should we use different ratelimits for warnings/notices/errors? */ 58 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) 59 return; 60 61 va_start(args, fmt); 62 63 level = printk_get_level(fmt); 64 vaf.fmt = printk_skip_level(fmt); 65 vaf.va = &args; 66 printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf); 67 68 va_end(args); 69 } 70 71 static char s_name_buf[512]; 72 static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf' 73 74 /* print warnings/notices/errors about inode using name or inode number */ 75 void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) 76 { 77 struct super_block *sb = inode->i_sb; 78 struct ntfs_sb_info *sbi = sb->s_fs_info; 79 char *name; 80 va_list args; 81 struct va_format vaf; 82 int level; 83 84 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) 85 return; 86 87 /* use static allocated buffer, if possible */ 88 name = atomic_dec_and_test(&s_name_buf_cnt) 89 ? s_name_buf 90 : kmalloc(sizeof(s_name_buf), GFP_NOFS); 91 92 if (name) { 93 struct dentry *de = d_find_alias(inode); 94 const u32 name_len = ARRAY_SIZE(s_name_buf) - 1; 95 96 if (de) { 97 spin_lock(&de->d_lock); 98 snprintf(name, name_len, " \"%s\"", de->d_name.name); 99 spin_unlock(&de->d_lock); 100 name[name_len] = 0; /* to be sure*/ 101 } else { 102 name[0] = 0; 103 } 104 dput(de); /* cocci warns if placed in branch "if (de)" */ 105 } 106 107 va_start(args, fmt); 108 109 level = printk_get_level(fmt); 110 vaf.fmt = printk_skip_level(fmt); 111 vaf.va = &args; 112 113 printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level, 114 sb->s_id, inode->i_ino, name ? name : "", &vaf); 115 116 va_end(args); 117 118 atomic_inc(&s_name_buf_cnt); 119 if (name != s_name_buf) 120 kfree(name); 121 } 122 #endif 123 124 /* 125 * Shared memory struct. 126 * 127 * on-disk ntfs's upcase table is created by ntfs formatter 128 * 'upcase' table is 128K bytes of memory 129 * we should read it into memory when mounting 130 * Several ntfs volumes likely use the same 'upcase' table 131 * It is good idea to share in-memory 'upcase' table between different volumes 132 * Unfortunately winxp/vista/win7 use different upcase tables 133 */ 134 static DEFINE_SPINLOCK(s_shared_lock); 135 136 static struct { 137 void *ptr; 138 u32 len; 139 int cnt; 140 } s_shared[8]; 141 142 /* 143 * ntfs_set_shared 144 * 145 * Returns 'ptr' if pointer was saved in shared memory 146 * Returns NULL if pointer was not shared 147 */ 148 void *ntfs_set_shared(void *ptr, u32 bytes) 149 { 150 void *ret = NULL; 151 int i, j = -1; 152 153 spin_lock(&s_shared_lock); 154 for (i = 0; i < ARRAY_SIZE(s_shared); i++) { 155 if (!s_shared[i].cnt) { 156 j = i; 157 } else if (bytes == s_shared[i].len && 158 !memcmp(s_shared[i].ptr, ptr, bytes)) { 159 s_shared[i].cnt += 1; 160 ret = s_shared[i].ptr; 161 break; 162 } 163 } 164 165 if (!ret && j != -1) { 166 s_shared[j].ptr = ptr; 167 s_shared[j].len = bytes; 168 s_shared[j].cnt = 1; 169 ret = ptr; 170 } 171 spin_unlock(&s_shared_lock); 172 173 return ret; 174 } 175 176 /* 177 * ntfs_put_shared 178 * 179 * Returns 'ptr' if pointer is not shared anymore 180 * Returns NULL if pointer is still shared 181 */ 182 void *ntfs_put_shared(void *ptr) 183 { 184 void *ret = ptr; 185 int i; 186 187 spin_lock(&s_shared_lock); 188 for (i = 0; i < ARRAY_SIZE(s_shared); i++) { 189 if (s_shared[i].cnt && s_shared[i].ptr == ptr) { 190 if (--s_shared[i].cnt) 191 ret = NULL; 192 break; 193 } 194 } 195 spin_unlock(&s_shared_lock); 196 197 return ret; 198 } 199 200 static inline void clear_mount_options(struct ntfs_mount_options *options) 201 { 202 unload_nls(options->nls); 203 } 204 205 enum Opt { 206 Opt_uid, 207 Opt_gid, 208 Opt_umask, 209 Opt_dmask, 210 Opt_fmask, 211 Opt_immutable, 212 Opt_discard, 213 Opt_force, 214 Opt_sparse, 215 Opt_nohidden, 216 Opt_showmeta, 217 Opt_acl, 218 Opt_noatime, 219 Opt_nls, 220 Opt_prealloc, 221 Opt_no_acs_rules, 222 Opt_err, 223 }; 224 225 static const match_table_t ntfs_tokens = { 226 { Opt_uid, "uid=%u" }, 227 { Opt_gid, "gid=%u" }, 228 { Opt_umask, "umask=%o" }, 229 { Opt_dmask, "dmask=%o" }, 230 { Opt_fmask, "fmask=%o" }, 231 { Opt_immutable, "sys_immutable" }, 232 { Opt_discard, "discard" }, 233 { Opt_force, "force" }, 234 { Opt_sparse, "sparse" }, 235 { Opt_nohidden, "nohidden" }, 236 { Opt_acl, "acl" }, 237 { Opt_noatime, "noatime" }, 238 { Opt_showmeta, "showmeta" }, 239 { Opt_nls, "nls=%s" }, 240 { Opt_prealloc, "prealloc" }, 241 { Opt_no_acs_rules, "no_acs_rules" }, 242 { Opt_err, NULL }, 243 }; 244 245 static noinline int ntfs_parse_options(struct super_block *sb, char *options, 246 int silent, 247 struct ntfs_mount_options *opts) 248 { 249 char *p; 250 substring_t args[MAX_OPT_ARGS]; 251 int option; 252 char nls_name[30]; 253 struct nls_table *nls; 254 255 opts->fs_uid = current_uid(); 256 opts->fs_gid = current_gid(); 257 opts->fs_fmask_inv = opts->fs_dmask_inv = ~current_umask(); 258 nls_name[0] = 0; 259 260 if (!options) 261 goto out; 262 263 while ((p = strsep(&options, ","))) { 264 int token; 265 266 if (!*p) 267 continue; 268 269 token = match_token(p, ntfs_tokens, args); 270 switch (token) { 271 case Opt_immutable: 272 opts->sys_immutable = 1; 273 break; 274 case Opt_uid: 275 if (match_int(&args[0], &option)) 276 return -EINVAL; 277 opts->fs_uid = make_kuid(current_user_ns(), option); 278 if (!uid_valid(opts->fs_uid)) 279 return -EINVAL; 280 opts->uid = 1; 281 break; 282 case Opt_gid: 283 if (match_int(&args[0], &option)) 284 return -EINVAL; 285 opts->fs_gid = make_kgid(current_user_ns(), option); 286 if (!gid_valid(opts->fs_gid)) 287 return -EINVAL; 288 opts->gid = 1; 289 break; 290 case Opt_umask: 291 if (match_octal(&args[0], &option)) 292 return -EINVAL; 293 opts->fs_fmask_inv = opts->fs_dmask_inv = ~option; 294 opts->fmask = opts->dmask = 1; 295 break; 296 case Opt_dmask: 297 if (match_octal(&args[0], &option)) 298 return -EINVAL; 299 opts->fs_dmask_inv = ~option; 300 opts->dmask = 1; 301 break; 302 case Opt_fmask: 303 if (match_octal(&args[0], &option)) 304 return -EINVAL; 305 opts->fs_fmask_inv = ~option; 306 opts->fmask = 1; 307 break; 308 case Opt_discard: 309 opts->discard = 1; 310 break; 311 case Opt_force: 312 opts->force = 1; 313 break; 314 case Opt_sparse: 315 opts->sparse = 1; 316 break; 317 case Opt_nohidden: 318 opts->nohidden = 1; 319 break; 320 case Opt_acl: 321 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 322 sb->s_flags |= SB_POSIXACL; 323 break; 324 #else 325 ntfs_err(sb, "support for ACL not compiled in!"); 326 return -EINVAL; 327 #endif 328 case Opt_noatime: 329 sb->s_flags |= SB_NOATIME; 330 break; 331 case Opt_showmeta: 332 opts->showmeta = 1; 333 break; 334 case Opt_nls: 335 match_strlcpy(nls_name, &args[0], sizeof(nls_name)); 336 break; 337 case Opt_prealloc: 338 opts->prealloc = 1; 339 break; 340 case Opt_no_acs_rules: 341 opts->no_acs_rules = 1; 342 break; 343 default: 344 if (!silent) 345 ntfs_err( 346 sb, 347 "Unrecognized mount option \"%s\" or missing value", 348 p); 349 //return -EINVAL; 350 } 351 } 352 353 out: 354 if (!strcmp(nls_name[0] ? nls_name : CONFIG_NLS_DEFAULT, "utf8")) { 355 /* For UTF-8 use utf16s_to_utf8s/utf8s_to_utf16s instead of nls */ 356 nls = NULL; 357 } else if (nls_name[0]) { 358 nls = load_nls(nls_name); 359 if (!nls) { 360 ntfs_err(sb, "failed to load \"%s\"", nls_name); 361 return -EINVAL; 362 } 363 } else { 364 nls = load_nls_default(); 365 if (!nls) { 366 ntfs_err(sb, "failed to load default nls"); 367 return -EINVAL; 368 } 369 } 370 opts->nls = nls; 371 372 return 0; 373 } 374 375 static int ntfs_remount(struct super_block *sb, int *flags, char *data) 376 { 377 int err, ro_rw; 378 struct ntfs_sb_info *sbi = sb->s_fs_info; 379 struct ntfs_mount_options old_opts; 380 char *orig_data = kstrdup(data, GFP_KERNEL); 381 382 if (data && !orig_data) 383 return -ENOMEM; 384 385 /* Store original options */ 386 memcpy(&old_opts, &sbi->options, sizeof(old_opts)); 387 clear_mount_options(&sbi->options); 388 memset(&sbi->options, 0, sizeof(sbi->options)); 389 390 err = ntfs_parse_options(sb, data, 0, &sbi->options); 391 if (err) 392 goto restore_opts; 393 394 ro_rw = sb_rdonly(sb) && !(*flags & SB_RDONLY); 395 if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { 396 ntfs_warn( 397 sb, 398 "Couldn't remount rw because journal is not replayed. Please umount/remount instead\n"); 399 err = -EINVAL; 400 goto restore_opts; 401 } 402 403 sync_filesystem(sb); 404 405 if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) && 406 !sbi->options.force) { 407 ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!"); 408 err = -EINVAL; 409 goto restore_opts; 410 } 411 412 clear_mount_options(&old_opts); 413 414 *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME) | 415 SB_NODIRATIME | SB_NOATIME; 416 ntfs_info(sb, "re-mounted. Opts: %s", orig_data); 417 err = 0; 418 goto out; 419 420 restore_opts: 421 clear_mount_options(&sbi->options); 422 memcpy(&sbi->options, &old_opts, sizeof(old_opts)); 423 424 out: 425 kfree(orig_data); 426 return err; 427 } 428 429 static struct kmem_cache *ntfs_inode_cachep; 430 431 static struct inode *ntfs_alloc_inode(struct super_block *sb) 432 { 433 struct ntfs_inode *ni = kmem_cache_alloc(ntfs_inode_cachep, GFP_NOFS); 434 435 if (!ni) 436 return NULL; 437 438 memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode)); 439 440 mutex_init(&ni->ni_lock); 441 442 return &ni->vfs_inode; 443 } 444 445 static void ntfs_i_callback(struct rcu_head *head) 446 { 447 struct inode *inode = container_of(head, struct inode, i_rcu); 448 struct ntfs_inode *ni = ntfs_i(inode); 449 450 mutex_destroy(&ni->ni_lock); 451 452 kmem_cache_free(ntfs_inode_cachep, ni); 453 } 454 455 static void ntfs_destroy_inode(struct inode *inode) 456 { 457 call_rcu(&inode->i_rcu, ntfs_i_callback); 458 } 459 460 static void init_once(void *foo) 461 { 462 struct ntfs_inode *ni = foo; 463 464 inode_init_once(&ni->vfs_inode); 465 } 466 467 /* noinline to reduce binary size*/ 468 static noinline void put_ntfs(struct ntfs_sb_info *sbi) 469 { 470 ntfs_free(sbi->new_rec); 471 ntfs_vfree(ntfs_put_shared(sbi->upcase)); 472 ntfs_free(sbi->def_table); 473 474 wnd_close(&sbi->mft.bitmap); 475 wnd_close(&sbi->used.bitmap); 476 477 if (sbi->mft.ni) 478 iput(&sbi->mft.ni->vfs_inode); 479 480 if (sbi->security.ni) 481 iput(&sbi->security.ni->vfs_inode); 482 483 if (sbi->reparse.ni) 484 iput(&sbi->reparse.ni->vfs_inode); 485 486 if (sbi->objid.ni) 487 iput(&sbi->objid.ni->vfs_inode); 488 489 if (sbi->volume.ni) 490 iput(&sbi->volume.ni->vfs_inode); 491 492 ntfs_update_mftmirr(sbi, 0); 493 494 indx_clear(&sbi->security.index_sii); 495 indx_clear(&sbi->security.index_sdh); 496 indx_clear(&sbi->reparse.index_r); 497 indx_clear(&sbi->objid.index_o); 498 ntfs_free(sbi->compress.lznt); 499 #ifdef CONFIG_NTFS3_LZX_XPRESS 500 xpress_free_decompressor(sbi->compress.xpress); 501 lzx_free_decompressor(sbi->compress.lzx); 502 #endif 503 clear_mount_options(&sbi->options); 504 505 ntfs_free(sbi); 506 } 507 508 static void ntfs_put_super(struct super_block *sb) 509 { 510 struct ntfs_sb_info *sbi = sb->s_fs_info; 511 512 /*mark rw ntfs as clear, if possible*/ 513 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); 514 515 put_ntfs(sbi); 516 517 sync_blockdev(sb->s_bdev); 518 } 519 520 static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf) 521 { 522 struct super_block *sb = dentry->d_sb; 523 struct ntfs_sb_info *sbi = sb->s_fs_info; 524 struct wnd_bitmap *wnd = &sbi->used.bitmap; 525 526 buf->f_type = sb->s_magic; 527 buf->f_bsize = sbi->cluster_size; 528 buf->f_blocks = wnd->nbits; 529 530 buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd); 531 buf->f_fsid.val[0] = sbi->volume.ser_num; 532 buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32); 533 buf->f_namelen = NTFS_NAME_LEN; 534 535 return 0; 536 } 537 538 static int ntfs_show_options(struct seq_file *m, struct dentry *root) 539 { 540 struct super_block *sb = root->d_sb; 541 struct ntfs_sb_info *sbi = sb->s_fs_info; 542 struct ntfs_mount_options *opts = &sbi->options; 543 struct user_namespace *user_ns = seq_user_ns(m); 544 545 if (opts->uid) 546 seq_printf(m, ",uid=%u", 547 from_kuid_munged(user_ns, opts->fs_uid)); 548 if (opts->gid) 549 seq_printf(m, ",gid=%u", 550 from_kgid_munged(user_ns, opts->fs_gid)); 551 if (opts->fmask) 552 seq_printf(m, ",fmask=%04o", ~opts->fs_fmask_inv); 553 if (opts->dmask) 554 seq_printf(m, ",dmask=%04o", ~opts->fs_dmask_inv); 555 if (opts->nls) 556 seq_printf(m, ",nls=%s", opts->nls->charset); 557 else 558 seq_puts(m, ",nls=utf8"); 559 if (opts->sys_immutable) 560 seq_puts(m, ",sys_immutable"); 561 if (opts->discard) 562 seq_puts(m, ",discard"); 563 if (opts->sparse) 564 seq_puts(m, ",sparse"); 565 if (opts->showmeta) 566 seq_puts(m, ",showmeta"); 567 if (opts->nohidden) 568 seq_puts(m, ",nohidden"); 569 if (opts->force) 570 seq_puts(m, ",force"); 571 if (opts->no_acs_rules) 572 seq_puts(m, ",no_acs_rules"); 573 if (opts->prealloc) 574 seq_puts(m, ",prealloc"); 575 if (sb->s_flags & SB_POSIXACL) 576 seq_puts(m, ",acl"); 577 if (sb->s_flags & SB_NOATIME) 578 seq_puts(m, ",noatime"); 579 580 return 0; 581 } 582 583 /*super_operations::sync_fs*/ 584 static int ntfs_sync_fs(struct super_block *sb, int wait) 585 { 586 int err = 0, err2; 587 struct ntfs_sb_info *sbi = sb->s_fs_info; 588 struct ntfs_inode *ni; 589 struct inode *inode; 590 591 ni = sbi->security.ni; 592 if (ni) { 593 inode = &ni->vfs_inode; 594 err2 = _ni_write_inode(inode, wait); 595 if (err2 && !err) 596 err = err2; 597 } 598 599 ni = sbi->objid.ni; 600 if (ni) { 601 inode = &ni->vfs_inode; 602 err2 = _ni_write_inode(inode, wait); 603 if (err2 && !err) 604 err = err2; 605 } 606 607 ni = sbi->reparse.ni; 608 if (ni) { 609 inode = &ni->vfs_inode; 610 err2 = _ni_write_inode(inode, wait); 611 if (err2 && !err) 612 err = err2; 613 } 614 615 if (!err) 616 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); 617 618 ntfs_update_mftmirr(sbi, wait); 619 620 return err; 621 } 622 623 static const struct super_operations ntfs_sops = { 624 .alloc_inode = ntfs_alloc_inode, 625 .destroy_inode = ntfs_destroy_inode, 626 .evict_inode = ntfs_evict_inode, 627 .put_super = ntfs_put_super, 628 .statfs = ntfs_statfs, 629 .show_options = ntfs_show_options, 630 .sync_fs = ntfs_sync_fs, 631 .remount_fs = ntfs_remount, 632 .write_inode = ntfs3_write_inode, 633 }; 634 635 static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino, 636 u32 generation) 637 { 638 struct MFT_REF ref; 639 struct inode *inode; 640 641 ref.low = cpu_to_le32(ino); 642 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 643 ref.high = cpu_to_le16(ino >> 32); 644 #else 645 ref.high = 0; 646 #endif 647 ref.seq = cpu_to_le16(generation); 648 649 inode = ntfs_iget5(sb, &ref, NULL); 650 if (!IS_ERR(inode) && is_bad_inode(inode)) { 651 iput(inode); 652 inode = ERR_PTR(-ESTALE); 653 } 654 655 return inode; 656 } 657 658 static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid, 659 int fh_len, int fh_type) 660 { 661 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 662 ntfs_export_get_inode); 663 } 664 665 static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid, 666 int fh_len, int fh_type) 667 { 668 return generic_fh_to_parent(sb, fid, fh_len, fh_type, 669 ntfs_export_get_inode); 670 } 671 672 /* TODO: == ntfs_sync_inode */ 673 static int ntfs_nfs_commit_metadata(struct inode *inode) 674 { 675 return _ni_write_inode(inode, 1); 676 } 677 678 static const struct export_operations ntfs_export_ops = { 679 .fh_to_dentry = ntfs_fh_to_dentry, 680 .fh_to_parent = ntfs_fh_to_parent, 681 .get_parent = ntfs3_get_parent, 682 .commit_metadata = ntfs_nfs_commit_metadata, 683 }; 684 685 /* Returns Gb,Mb to print with "%u.%02u Gb" */ 686 static u32 format_size_gb(const u64 bytes, u32 *mb) 687 { 688 /* Do simple right 30 bit shift of 64 bit value */ 689 u64 kbytes = bytes >> 10; 690 u32 kbytes32 = kbytes; 691 692 *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20; 693 if (*mb >= 100) 694 *mb = 99; 695 696 return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12); 697 } 698 699 static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot) 700 { 701 return boot->sectors_per_clusters <= 0x80 702 ? boot->sectors_per_clusters 703 : (1u << (0 - boot->sectors_per_clusters)); 704 } 705 706 /* inits internal info from on-disk boot sector*/ 707 static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, 708 u64 dev_size) 709 { 710 struct ntfs_sb_info *sbi = sb->s_fs_info; 711 int err; 712 u32 mb, gb, boot_sector_size, sct_per_clst, record_size; 713 u64 sectors, clusters, fs_size, mlcn, mlcn2; 714 struct NTFS_BOOT *boot; 715 struct buffer_head *bh; 716 struct MFT_REC *rec; 717 u16 fn, ao; 718 719 sbi->volume.blocks = dev_size >> PAGE_SHIFT; 720 721 bh = ntfs_bread(sb, 0); 722 if (!bh) 723 return -EIO; 724 725 err = -EINVAL; 726 boot = (struct NTFS_BOOT *)bh->b_data; 727 728 if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) 729 goto out; 730 731 /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/ 732 /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1]) 733 * goto out; 734 */ 735 736 boot_sector_size = (u32)boot->bytes_per_sector[1] << 8; 737 if (boot->bytes_per_sector[0] || boot_sector_size < SECTOR_SIZE || 738 !is_power_of2(boot_sector_size)) { 739 goto out; 740 } 741 742 /* cluster size: 512, 1K, 2K, 4K, ... 2M */ 743 sct_per_clst = true_sectors_per_clst(boot); 744 if (!is_power_of2(sct_per_clst)) 745 goto out; 746 747 mlcn = le64_to_cpu(boot->mft_clst); 748 mlcn2 = le64_to_cpu(boot->mft2_clst); 749 sectors = le64_to_cpu(boot->sectors_per_volume); 750 751 if (mlcn * sct_per_clst >= sectors) 752 goto out; 753 754 if (mlcn2 * sct_per_clst >= sectors) 755 goto out; 756 757 /* Check MFT record size */ 758 if ((boot->record_size < 0 && 759 SECTOR_SIZE > (2U << (-boot->record_size))) || 760 (boot->record_size >= 0 && !is_power_of2(boot->record_size))) { 761 goto out; 762 } 763 764 /* Check index record size */ 765 if ((boot->index_size < 0 && 766 SECTOR_SIZE > (2U << (-boot->index_size))) || 767 (boot->index_size >= 0 && !is_power_of2(boot->index_size))) { 768 goto out; 769 } 770 771 sbi->sector_size = boot_sector_size; 772 sbi->sector_bits = blksize_bits(boot_sector_size); 773 fs_size = (sectors + 1) << sbi->sector_bits; 774 775 gb = format_size_gb(fs_size, &mb); 776 777 /* 778 * - Volume formatted and mounted with the same sector size 779 * - Volume formatted 4K and mounted as 512 780 * - Volume formatted 512 and mounted as 4K 781 */ 782 if (sbi->sector_size != sector_size) { 783 ntfs_warn(sb, 784 "Different NTFS' sector size and media sector size"); 785 dev_size += sector_size - 1; 786 } 787 788 sbi->cluster_size = boot_sector_size * sct_per_clst; 789 sbi->cluster_bits = blksize_bits(sbi->cluster_size); 790 791 sbi->mft.lbo = mlcn << sbi->cluster_bits; 792 sbi->mft.lbo2 = mlcn2 << sbi->cluster_bits; 793 794 if (sbi->cluster_size < sbi->sector_size) 795 goto out; 796 797 sbi->cluster_mask = sbi->cluster_size - 1; 798 sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask; 799 sbi->record_size = record_size = boot->record_size < 0 800 ? 1 << (-boot->record_size) 801 : (u32)boot->record_size 802 << sbi->cluster_bits; 803 804 if (record_size > MAXIMUM_BYTES_PER_MFT) 805 goto out; 806 807 sbi->record_bits = blksize_bits(record_size); 808 sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes 809 810 sbi->max_bytes_per_attr = 811 record_size - QuadAlign(MFTRECORD_FIXUP_OFFSET_1) - 812 QuadAlign(((record_size >> SECTOR_SHIFT) * sizeof(short))) - 813 QuadAlign(sizeof(enum ATTR_TYPE)); 814 815 sbi->index_size = boot->index_size < 0 816 ? 1u << (-boot->index_size) 817 : (u32)boot->index_size << sbi->cluster_bits; 818 819 sbi->volume.ser_num = le64_to_cpu(boot->serial_num); 820 sbi->volume.size = sectors << sbi->sector_bits; 821 822 /* warning if RAW volume */ 823 if (dev_size < fs_size) { 824 u32 mb0, gb0; 825 826 gb0 = format_size_gb(dev_size, &mb0); 827 ntfs_warn( 828 sb, 829 "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only", 830 gb, mb, gb0, mb0); 831 sb->s_flags |= SB_RDONLY; 832 } 833 834 clusters = sbi->volume.size >> sbi->cluster_bits; 835 #ifndef CONFIG_NTFS3_64BIT_CLUSTER 836 /* 32 bits per cluster */ 837 if (clusters >> 32) { 838 ntfs_notice( 839 sb, 840 "NTFS %u.%02u Gb is too big to use 32 bits per cluster", 841 gb, mb); 842 goto out; 843 } 844 #elif BITS_PER_LONG < 64 845 #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS" 846 #endif 847 848 sbi->used.bitmap.nbits = clusters; 849 850 rec = ntfs_zalloc(record_size); 851 if (!rec) { 852 err = -ENOMEM; 853 goto out; 854 } 855 856 sbi->new_rec = rec; 857 rec->rhdr.sign = NTFS_FILE_SIGNATURE; 858 rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET_1); 859 fn = (sbi->record_size >> SECTOR_SHIFT) + 1; 860 rec->rhdr.fix_num = cpu_to_le16(fn); 861 ao = QuadAlign(MFTRECORD_FIXUP_OFFSET_1 + sizeof(short) * fn); 862 rec->attr_off = cpu_to_le16(ao); 863 rec->used = cpu_to_le32(ao + QuadAlign(sizeof(enum ATTR_TYPE))); 864 rec->total = cpu_to_le32(sbi->record_size); 865 ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END; 866 867 if (sbi->cluster_size < PAGE_SIZE) 868 sb_set_blocksize(sb, sbi->cluster_size); 869 870 sbi->block_mask = sb->s_blocksize - 1; 871 sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits; 872 sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits; 873 874 /* Maximum size for normal files */ 875 sbi->maxbytes = (clusters << sbi->cluster_bits) - 1; 876 877 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 878 if (clusters >= (1ull << (64 - sbi->cluster_bits))) 879 sbi->maxbytes = -1; 880 sbi->maxbytes_sparse = -1; 881 #else 882 /* Maximum size for sparse file */ 883 sbi->maxbytes_sparse = (1ull << (sbi->cluster_bits + 32)) - 1; 884 #endif 885 886 err = 0; 887 888 out: 889 brelse(bh); 890 891 return err; 892 } 893 894 /* try to mount*/ 895 static int ntfs_fill_super(struct super_block *sb, void *data, int silent) 896 { 897 int err; 898 struct ntfs_sb_info *sbi; 899 struct block_device *bdev = sb->s_bdev; 900 struct inode *bd_inode = bdev->bd_inode; 901 struct request_queue *rq = bdev_get_queue(bdev); 902 struct inode *inode = NULL; 903 struct ntfs_inode *ni; 904 size_t i, tt; 905 CLST vcn, lcn, len; 906 struct ATTRIB *attr; 907 const struct VOLUME_INFO *info; 908 u32 idx, done, bytes; 909 struct ATTR_DEF_ENTRY *t; 910 u16 *upcase = NULL; 911 u16 *shared; 912 bool is_ro; 913 struct MFT_REF ref; 914 915 ref.high = 0; 916 917 sbi = ntfs_zalloc(sizeof(struct ntfs_sb_info)); 918 if (!sbi) 919 return -ENOMEM; 920 921 sb->s_fs_info = sbi; 922 sbi->sb = sb; 923 sb->s_flags |= SB_NODIRATIME; 924 sb->s_magic = 0x7366746e; // "ntfs" 925 sb->s_op = &ntfs_sops; 926 sb->s_export_op = &ntfs_export_ops; 927 sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec 928 sb->s_xattr = ntfs_xattr_handlers; 929 930 ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL, 931 DEFAULT_RATELIMIT_BURST); 932 933 err = ntfs_parse_options(sb, data, silent, &sbi->options); 934 if (err) 935 goto out; 936 937 if (!rq || !blk_queue_discard(rq) || !rq->limits.discard_granularity) { 938 ; 939 } else { 940 sbi->discard_granularity = rq->limits.discard_granularity; 941 sbi->discard_granularity_mask_inv = 942 ~(u64)(sbi->discard_granularity - 1); 943 } 944 945 sb_set_blocksize(sb, PAGE_SIZE); 946 947 /* parse boot */ 948 err = ntfs_init_from_boot(sb, rq ? queue_logical_block_size(rq) : 512, 949 bd_inode->i_size); 950 if (err) 951 goto out; 952 953 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 954 sb->s_maxbytes = MAX_LFS_FILESIZE; 955 #else 956 sb->s_maxbytes = 0xFFFFFFFFull << sbi->cluster_bits; 957 #endif 958 959 mutex_init(&sbi->compress.mtx_lznt); 960 #ifdef CONFIG_NTFS3_LZX_XPRESS 961 mutex_init(&sbi->compress.mtx_xpress); 962 mutex_init(&sbi->compress.mtx_lzx); 963 #endif 964 965 /* 966 * Load $Volume. This should be done before LogFile 967 * 'cause 'sbi->volume.ni' is used 'ntfs_set_state' 968 */ 969 ref.low = cpu_to_le32(MFT_REC_VOL); 970 ref.seq = cpu_to_le16(MFT_REC_VOL); 971 inode = ntfs_iget5(sb, &ref, &NAME_VOLUME); 972 if (IS_ERR(inode)) { 973 err = PTR_ERR(inode); 974 ntfs_err(sb, "Failed to load $Volume."); 975 inode = NULL; 976 goto out; 977 } 978 979 ni = ntfs_i(inode); 980 981 /* Load and save label (not necessary) */ 982 attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL); 983 984 if (!attr) { 985 /* It is ok if no ATTR_LABEL */ 986 } else if (!attr->non_res && !is_attr_ext(attr)) { 987 /* $AttrDef allows labels to be up to 128 symbols */ 988 err = utf16s_to_utf8s(resident_data(attr), 989 le32_to_cpu(attr->res.data_size) >> 1, 990 UTF16_LITTLE_ENDIAN, sbi->volume.label, 991 sizeof(sbi->volume.label)); 992 if (err < 0) 993 sbi->volume.label[0] = 0; 994 } else { 995 /* should we break mounting here? */ 996 //err = -EINVAL; 997 //goto out; 998 } 999 1000 attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL); 1001 if (!attr || is_attr_ext(attr)) { 1002 err = -EINVAL; 1003 goto out; 1004 } 1005 1006 info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO); 1007 if (!info) { 1008 err = -EINVAL; 1009 goto out; 1010 } 1011 1012 sbi->volume.major_ver = info->major_ver; 1013 sbi->volume.minor_ver = info->minor_ver; 1014 sbi->volume.flags = info->flags; 1015 1016 sbi->volume.ni = ni; 1017 inode = NULL; 1018 1019 /* Load $MFTMirr to estimate recs_mirr */ 1020 ref.low = cpu_to_le32(MFT_REC_MIRR); 1021 ref.seq = cpu_to_le16(MFT_REC_MIRR); 1022 inode = ntfs_iget5(sb, &ref, &NAME_MIRROR); 1023 if (IS_ERR(inode)) { 1024 err = PTR_ERR(inode); 1025 ntfs_err(sb, "Failed to load $MFTMirr."); 1026 inode = NULL; 1027 goto out; 1028 } 1029 1030 sbi->mft.recs_mirr = 1031 ntfs_up_cluster(sbi, inode->i_size) >> sbi->record_bits; 1032 1033 iput(inode); 1034 1035 /* Load LogFile to replay */ 1036 ref.low = cpu_to_le32(MFT_REC_LOG); 1037 ref.seq = cpu_to_le16(MFT_REC_LOG); 1038 inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); 1039 if (IS_ERR(inode)) { 1040 err = PTR_ERR(inode); 1041 ntfs_err(sb, "Failed to load \x24LogFile."); 1042 inode = NULL; 1043 goto out; 1044 } 1045 1046 ni = ntfs_i(inode); 1047 1048 err = ntfs_loadlog_and_replay(ni, sbi); 1049 if (err) 1050 goto out; 1051 1052 iput(inode); 1053 inode = NULL; 1054 1055 is_ro = sb_rdonly(sbi->sb); 1056 1057 if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) { 1058 if (!is_ro) { 1059 ntfs_warn(sb, 1060 "failed to replay log file. Can't mount rw!"); 1061 err = -EINVAL; 1062 goto out; 1063 } 1064 } else if (sbi->volume.flags & VOLUME_FLAG_DIRTY) { 1065 if (!is_ro && !sbi->options.force) { 1066 ntfs_warn( 1067 sb, 1068 "volume is dirty and \"force\" flag is not set!"); 1069 err = -EINVAL; 1070 goto out; 1071 } 1072 } 1073 1074 /* Load $MFT */ 1075 ref.low = cpu_to_le32(MFT_REC_MFT); 1076 ref.seq = cpu_to_le16(1); 1077 1078 inode = ntfs_iget5(sb, &ref, &NAME_MFT); 1079 if (IS_ERR(inode)) { 1080 err = PTR_ERR(inode); 1081 ntfs_err(sb, "Failed to load $MFT."); 1082 inode = NULL; 1083 goto out; 1084 } 1085 1086 ni = ntfs_i(inode); 1087 1088 sbi->mft.used = ni->i_valid >> sbi->record_bits; 1089 tt = inode->i_size >> sbi->record_bits; 1090 sbi->mft.next_free = MFT_REC_USER; 1091 1092 err = wnd_init(&sbi->mft.bitmap, sb, tt); 1093 if (err) 1094 goto out; 1095 1096 err = ni_load_all_mi(ni); 1097 if (err) 1098 goto out; 1099 1100 sbi->mft.ni = ni; 1101 1102 /* Load $BadClus */ 1103 ref.low = cpu_to_le32(MFT_REC_BADCLUST); 1104 ref.seq = cpu_to_le16(MFT_REC_BADCLUST); 1105 inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS); 1106 if (IS_ERR(inode)) { 1107 err = PTR_ERR(inode); 1108 ntfs_err(sb, "Failed to load $BadClus."); 1109 inode = NULL; 1110 goto out; 1111 } 1112 1113 ni = ntfs_i(inode); 1114 1115 for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) { 1116 if (lcn == SPARSE_LCN) 1117 continue; 1118 1119 if (!sbi->bad_clusters) 1120 ntfs_notice(sb, "Volume contains bad blocks"); 1121 1122 sbi->bad_clusters += len; 1123 } 1124 1125 iput(inode); 1126 1127 /* Load $Bitmap */ 1128 ref.low = cpu_to_le32(MFT_REC_BITMAP); 1129 ref.seq = cpu_to_le16(MFT_REC_BITMAP); 1130 inode = ntfs_iget5(sb, &ref, &NAME_BITMAP); 1131 if (IS_ERR(inode)) { 1132 err = PTR_ERR(inode); 1133 ntfs_err(sb, "Failed to load $Bitmap."); 1134 inode = NULL; 1135 goto out; 1136 } 1137 1138 ni = ntfs_i(inode); 1139 1140 #ifndef CONFIG_NTFS3_64BIT_CLUSTER 1141 if (inode->i_size >> 32) { 1142 err = -EINVAL; 1143 goto out; 1144 } 1145 #endif 1146 1147 /* Check bitmap boundary */ 1148 tt = sbi->used.bitmap.nbits; 1149 if (inode->i_size < bitmap_size(tt)) { 1150 err = -EINVAL; 1151 goto out; 1152 } 1153 1154 /* Not necessary */ 1155 sbi->used.bitmap.set_tail = true; 1156 err = wnd_init(&sbi->used.bitmap, sbi->sb, tt); 1157 if (err) 1158 goto out; 1159 1160 iput(inode); 1161 1162 /* Compute the mft zone */ 1163 err = ntfs_refresh_zone(sbi); 1164 if (err) 1165 goto out; 1166 1167 /* Load $AttrDef */ 1168 ref.low = cpu_to_le32(MFT_REC_ATTR); 1169 ref.seq = cpu_to_le16(MFT_REC_ATTR); 1170 inode = ntfs_iget5(sbi->sb, &ref, &NAME_ATTRDEF); 1171 if (IS_ERR(inode)) { 1172 err = PTR_ERR(inode); 1173 ntfs_err(sb, "Failed to load $AttrDef -> %d", err); 1174 inode = NULL; 1175 goto out; 1176 } 1177 1178 if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY)) { 1179 err = -EINVAL; 1180 goto out; 1181 } 1182 bytes = inode->i_size; 1183 sbi->def_table = t = ntfs_malloc(bytes); 1184 if (!t) { 1185 err = -ENOMEM; 1186 goto out; 1187 } 1188 1189 for (done = idx = 0; done < bytes; done += PAGE_SIZE, idx++) { 1190 unsigned long tail = bytes - done; 1191 struct page *page = ntfs_map_page(inode->i_mapping, idx); 1192 1193 if (IS_ERR(page)) { 1194 err = PTR_ERR(page); 1195 goto out; 1196 } 1197 memcpy(Add2Ptr(t, done), page_address(page), 1198 min(PAGE_SIZE, tail)); 1199 ntfs_unmap_page(page); 1200 1201 if (!idx && ATTR_STD != t->type) { 1202 err = -EINVAL; 1203 goto out; 1204 } 1205 } 1206 1207 t += 1; 1208 sbi->def_entries = 1; 1209 done = sizeof(struct ATTR_DEF_ENTRY); 1210 sbi->reparse.max_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE; 1211 sbi->ea_max_size = 0x10000; /* default formatter value */ 1212 1213 while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) { 1214 u32 t32 = le32_to_cpu(t->type); 1215 u64 sz = le64_to_cpu(t->max_sz); 1216 1217 if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32) 1218 break; 1219 1220 if (t->type == ATTR_REPARSE) 1221 sbi->reparse.max_size = sz; 1222 else if (t->type == ATTR_EA) 1223 sbi->ea_max_size = sz; 1224 1225 done += sizeof(struct ATTR_DEF_ENTRY); 1226 t += 1; 1227 sbi->def_entries += 1; 1228 } 1229 iput(inode); 1230 1231 /* Load $UpCase */ 1232 ref.low = cpu_to_le32(MFT_REC_UPCASE); 1233 ref.seq = cpu_to_le16(MFT_REC_UPCASE); 1234 inode = ntfs_iget5(sb, &ref, &NAME_UPCASE); 1235 if (IS_ERR(inode)) { 1236 err = PTR_ERR(inode); 1237 ntfs_err(sb, "Failed to load \x24LogFile."); 1238 inode = NULL; 1239 goto out; 1240 } 1241 1242 ni = ntfs_i(inode); 1243 1244 if (inode->i_size != 0x10000 * sizeof(short)) { 1245 err = -EINVAL; 1246 goto out; 1247 } 1248 1249 sbi->upcase = upcase = ntfs_vmalloc(0x10000 * sizeof(short)); 1250 if (!upcase) { 1251 err = -ENOMEM; 1252 goto out; 1253 } 1254 1255 for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) { 1256 const __le16 *src; 1257 u16 *dst = Add2Ptr(upcase, idx << PAGE_SHIFT); 1258 struct page *page = ntfs_map_page(inode->i_mapping, idx); 1259 1260 if (IS_ERR(page)) { 1261 err = PTR_ERR(page); 1262 goto out; 1263 } 1264 1265 src = page_address(page); 1266 1267 #ifdef __BIG_ENDIAN 1268 for (i = 0; i < PAGE_SIZE / sizeof(u16); i++) 1269 *dst++ = le16_to_cpu(*src++); 1270 #else 1271 memcpy(dst, src, PAGE_SIZE); 1272 #endif 1273 ntfs_unmap_page(page); 1274 } 1275 1276 shared = ntfs_set_shared(upcase, 0x10000 * sizeof(short)); 1277 if (shared && upcase != shared) { 1278 sbi->upcase = shared; 1279 ntfs_vfree(upcase); 1280 } 1281 1282 iput(inode); 1283 inode = NULL; 1284 1285 if (is_ntfs3(sbi)) { 1286 /* Load $Secure */ 1287 err = ntfs_security_init(sbi); 1288 if (err) 1289 goto out; 1290 1291 /* Load $Extend */ 1292 err = ntfs_extend_init(sbi); 1293 if (err) 1294 goto load_root; 1295 1296 /* Load $Extend\$Reparse */ 1297 err = ntfs_reparse_init(sbi); 1298 if (err) 1299 goto load_root; 1300 1301 /* Load $Extend\$ObjId */ 1302 err = ntfs_objid_init(sbi); 1303 if (err) 1304 goto load_root; 1305 } 1306 1307 load_root: 1308 /* Load root */ 1309 ref.low = cpu_to_le32(MFT_REC_ROOT); 1310 ref.seq = cpu_to_le16(MFT_REC_ROOT); 1311 inode = ntfs_iget5(sb, &ref, &NAME_ROOT); 1312 if (IS_ERR(inode)) { 1313 err = PTR_ERR(inode); 1314 ntfs_err(sb, "Failed to load root."); 1315 inode = NULL; 1316 goto out; 1317 } 1318 1319 ni = ntfs_i(inode); 1320 1321 sb->s_root = d_make_root(inode); 1322 1323 if (!sb->s_root) { 1324 err = -EINVAL; 1325 goto out; 1326 } 1327 1328 return 0; 1329 1330 out: 1331 iput(inode); 1332 1333 if (sb->s_root) { 1334 d_drop(sb->s_root); 1335 sb->s_root = NULL; 1336 } 1337 1338 put_ntfs(sbi); 1339 1340 sb->s_fs_info = NULL; 1341 return err; 1342 } 1343 1344 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len) 1345 { 1346 struct ntfs_sb_info *sbi = sb->s_fs_info; 1347 struct block_device *bdev = sb->s_bdev; 1348 sector_t devblock = (u64)lcn * sbi->blocks_per_cluster; 1349 unsigned long blocks = (u64)len * sbi->blocks_per_cluster; 1350 unsigned long cnt = 0; 1351 unsigned long limit = global_zone_page_state(NR_FREE_PAGES) 1352 << (PAGE_SHIFT - sb->s_blocksize_bits); 1353 1354 if (limit >= 0x2000) 1355 limit -= 0x1000; 1356 else if (limit < 32) 1357 limit = 32; 1358 else 1359 limit >>= 1; 1360 1361 while (blocks--) { 1362 clean_bdev_aliases(bdev, devblock++, 1); 1363 if (cnt++ >= limit) { 1364 sync_blockdev(bdev); 1365 cnt = 0; 1366 } 1367 } 1368 } 1369 1370 /* 1371 * ntfs_discard 1372 * 1373 * issue a discard request (trim for SSD) 1374 */ 1375 int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len) 1376 { 1377 int err; 1378 u64 lbo, bytes, start, end; 1379 struct super_block *sb; 1380 1381 if (sbi->used.next_free_lcn == lcn + len) 1382 sbi->used.next_free_lcn = lcn; 1383 1384 if (sbi->flags & NTFS_FLAGS_NODISCARD) 1385 return -EOPNOTSUPP; 1386 1387 if (!sbi->options.discard) 1388 return -EOPNOTSUPP; 1389 1390 lbo = (u64)lcn << sbi->cluster_bits; 1391 bytes = (u64)len << sbi->cluster_bits; 1392 1393 /* Align up 'start' on discard_granularity */ 1394 start = (lbo + sbi->discard_granularity - 1) & 1395 sbi->discard_granularity_mask_inv; 1396 /* Align down 'end' on discard_granularity */ 1397 end = (lbo + bytes) & sbi->discard_granularity_mask_inv; 1398 1399 sb = sbi->sb; 1400 if (start >= end) 1401 return 0; 1402 1403 err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9, 1404 GFP_NOFS, 0); 1405 1406 if (err == -EOPNOTSUPP) 1407 sbi->flags |= NTFS_FLAGS_NODISCARD; 1408 1409 return err; 1410 } 1411 1412 static struct dentry *ntfs_mount(struct file_system_type *fs_type, int flags, 1413 const char *dev_name, void *data) 1414 { 1415 return mount_bdev(fs_type, flags, dev_name, data, ntfs_fill_super); 1416 } 1417 1418 // clang-format off 1419 static struct file_system_type ntfs_fs_type = { 1420 .owner = THIS_MODULE, 1421 .name = "ntfs3", 1422 .mount = ntfs_mount, 1423 .kill_sb = kill_block_super, 1424 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 1425 }; 1426 // clang-format on 1427 1428 static int __init init_ntfs_fs(void) 1429 { 1430 int err; 1431 1432 pr_notice("ntfs3: Index binary search\n"); 1433 pr_notice("ntfs3: Hot fix free clusters\n"); 1434 pr_notice("ntfs3: Max link count %u\n", NTFS_LINK_MAX); 1435 1436 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 1437 pr_notice("ntfs3: Enabled Linux POSIX ACLs support\n"); 1438 #endif 1439 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 1440 pr_notice("ntfs3: Activated 64 bits per cluster\n"); 1441 #else 1442 pr_notice("ntfs3: Activated 32 bits per cluster\n"); 1443 #endif 1444 #ifdef CONFIG_NTFS3_LZX_XPRESS 1445 pr_notice("ntfs3: Read-only lzx/xpress compression included\n"); 1446 #endif 1447 1448 err = ntfs3_init_bitmap(); 1449 if (err) 1450 return err; 1451 1452 ntfs_inode_cachep = kmem_cache_create( 1453 "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, 1454 (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT), 1455 init_once); 1456 if (!ntfs_inode_cachep) { 1457 err = -ENOMEM; 1458 goto out1; 1459 } 1460 1461 err = register_filesystem(&ntfs_fs_type); 1462 if (err) 1463 goto out; 1464 1465 return 0; 1466 out: 1467 kmem_cache_destroy(ntfs_inode_cachep); 1468 out1: 1469 ntfs3_exit_bitmap(); 1470 return err; 1471 } 1472 1473 static void __exit exit_ntfs_fs(void) 1474 { 1475 if (ntfs_inode_cachep) { 1476 rcu_barrier(); 1477 kmem_cache_destroy(ntfs_inode_cachep); 1478 } 1479 1480 unregister_filesystem(&ntfs_fs_type); 1481 ntfs3_exit_bitmap(); 1482 } 1483 1484 MODULE_LICENSE("GPL"); 1485 MODULE_DESCRIPTION("ntfs3 read/write filesystem"); 1486 MODULE_INFO(behaviour, "Index binary search"); 1487 MODULE_INFO(behaviour, "Hot fix free clusters"); 1488 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 1489 MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support"); 1490 #endif 1491 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 1492 MODULE_INFO(cluster, "Activated 64 bits per cluster"); 1493 #else 1494 MODULE_INFO(cluster, "Activated 32 bits per cluster"); 1495 #endif 1496 #ifdef CONFIG_NTFS3_LZX_XPRESS 1497 MODULE_INFO(compression, "Read-only lzx/xpress compression included"); 1498 #endif 1499 1500 MODULE_AUTHOR("Konstantin Komarov"); 1501 MODULE_ALIAS_FS("ntfs3"); 1502 1503 module_init(init_ntfs_fs); 1504 module_exit(exit_ntfs_fs); 1505