1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * 4 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. 5 * 6 * 7 * terminology 8 * 9 * cluster - allocation unit - 512,1K,2K,4K,...,2M 10 * vcn - virtual cluster number - Offset inside the file in clusters. 11 * vbo - virtual byte offset - Offset inside the file in bytes. 12 * lcn - logical cluster number - 0 based cluster in clusters heap. 13 * lbo - logical byte offset - Absolute position inside volume. 14 * run - maps VCN to LCN - Stored in attributes in packed form. 15 * attr - attribute segment - std/name/data etc records inside MFT. 16 * mi - MFT inode - One MFT record(usually 1024 bytes or 4K), consists of attributes. 17 * ni - NTFS inode - Extends linux inode. consists of one or more mft inodes. 18 * index - unit inside directory - 2K, 4K, <=page size, does not depend on cluster size. 19 * resident attribute - Attribute with content stored directly in the MFT record 20 * non-resident attribute - Attribute with content stored in clusters 21 * data_size - Size of attribute content in bytes. Equal to inode->i_size 22 * valid_size - Number of bytes written to the non-resident attribute 23 * allocated_size - Total size of clusters allocated for non-resident content 24 * total_size - Actual size of allocated clusters for sparse or compressed attributes 25 * - Constraint: valid_size <= data_size <= allocated_size 26 * ADS - Alternative data stream: Named data attribute (0x80) 27 * 28 * WSL - Windows Subsystem for Linux 29 * https://docs.microsoft.com/en-us/windows/wsl/file-permissions 30 * It stores uid/gid/mode/dev in xattr 31 * 32 * ntfs allows up to 2^64 clusters per volume. 33 * It means you should use 64 bits lcn to operate with ntfs. 34 * Implementation of ntfs.sys uses only 32 bits lcn. 35 * Default ntfs3 uses 32 bits lcn too. 36 * ntfs3 built with CONFIG_NTFS3_64BIT_CLUSTER (ntfs3_64) uses 64 bits per lcn. 37 * 38 * 39 * ntfs limits, cluster size is 4K (2^12) 40 * ----------------------------------------------------------------------------- 41 * | Volume size | Clusters | ntfs.sys | ntfs3 | ntfs3_64 | mkntfs | chkdsk | 42 * ----------------------------------------------------------------------------- 43 * | < 16T, 2^44 | < 2^32 | yes | yes | yes | yes | yes | 44 * | > 16T, 2^44 | > 2^32 | no | no | yes | yes | yes | 45 * ----------------------------------------------------------|------------------ 46 * 47 * To mount large volumes as ntfs one should use large cluster size (up to 2M) 48 * The maximum volume size in this case is 2^32 * 2^21 = 2^53 = 8P 49 * 50 * ntfs limits, cluster size is 2M (2^21) 51 * ----------------------------------------------------------------------------- 52 * | < 8P, 2^53 | < 2^32 | yes | yes | yes | yes | yes | 53 * | > 8P, 2^53 | > 2^32 | no | no | yes | yes | yes | 54 * ----------------------------------------------------------|------------------ 55 * 56 */ 57 58 #include <linux/blkdev.h> 59 #include <linux/buffer_head.h> 60 #include <linux/exportfs.h> 61 #include <linux/fs.h> 62 #include <linux/fs_context.h> 63 #include <linux/fs_parser.h> 64 #include <linux/fs_struct.h> 65 #include <linux/log2.h> 66 #include <linux/minmax.h> 67 #include <linux/module.h> 68 #include <linux/nls.h> 69 #include <linux/overflow.h> 70 #include <linux/proc_fs.h> 71 #include <linux/seq_file.h> 72 #include <linux/statfs.h> 73 74 #include "debug.h" 75 #include "ntfs.h" 76 #include "ntfs_fs.h" 77 #ifdef CONFIG_NTFS3_LZX_XPRESS 78 #include "lib/lib.h" 79 #endif 80 81 #ifdef CONFIG_PRINTK 82 /* 83 * ntfs_printk - Trace warnings/notices/errors. 84 * 85 * Thanks Joe Perches <joe@perches.com> for implementation 86 */ 87 void ntfs_printk(const struct super_block *sb, const char *fmt, ...) 88 { 89 struct va_format vaf; 90 va_list args; 91 int level; 92 struct ntfs_sb_info *sbi = sb->s_fs_info; 93 94 /* Should we use different ratelimits for warnings/notices/errors? */ 95 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) 96 return; 97 98 va_start(args, fmt); 99 100 level = printk_get_level(fmt); 101 vaf.fmt = printk_skip_level(fmt); 102 vaf.va = &args; 103 printk("%c%cntfs3(%s): %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf); 104 105 va_end(args); 106 } 107 108 static char s_name_buf[512]; 109 static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'. 110 111 /* 112 * ntfs_inode_printk 113 * 114 * Print warnings/notices/errors about inode using name or inode number. 115 */ 116 void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) 117 { 118 struct super_block *sb = inode->i_sb; 119 struct ntfs_sb_info *sbi = sb->s_fs_info; 120 char *name; 121 va_list args; 122 struct va_format vaf; 123 int level; 124 125 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) 126 return; 127 128 /* Use static allocated buffer, if possible. */ 129 name = atomic_dec_and_test(&s_name_buf_cnt) ? 130 s_name_buf : 131 kmalloc(sizeof(s_name_buf), GFP_NOFS); 132 133 if (name) { 134 struct dentry *de = d_find_alias(inode); 135 136 if (de) { 137 int len; 138 spin_lock(&de->d_lock); 139 len = snprintf(name, sizeof(s_name_buf), " \"%s\"", 140 de->d_name.name); 141 spin_unlock(&de->d_lock); 142 if (len <= 0) 143 name[0] = 0; 144 else if (len >= sizeof(s_name_buf)) 145 name[sizeof(s_name_buf) - 1] = 0; 146 } else { 147 name[0] = 0; 148 } 149 dput(de); /* Cocci warns if placed in branch "if (de)" */ 150 } 151 152 va_start(args, fmt); 153 154 level = printk_get_level(fmt); 155 vaf.fmt = printk_skip_level(fmt); 156 vaf.va = &args; 157 158 printk("%c%cntfs3(%s): ino=%llx,%s %pV\n", KERN_SOH_ASCII, level, 159 sb->s_id, inode->i_ino, name ? name : "", &vaf); 160 161 va_end(args); 162 163 atomic_inc(&s_name_buf_cnt); 164 if (name != s_name_buf) 165 kfree(name); 166 } 167 #endif 168 169 /* 170 * Shared memory struct. 171 * 172 * On-disk ntfs's upcase table is created by ntfs formatter. 173 * 'upcase' table is 128K bytes of memory. 174 * We should read it into memory when mounting. 175 * Several ntfs volumes likely use the same 'upcase' table. 176 * It is good idea to share in-memory 'upcase' table between different volumes. 177 * Unfortunately winxp/vista/win7 use different upcase tables. 178 */ 179 static DEFINE_SPINLOCK(s_shared_lock); 180 181 static struct { 182 void *ptr; 183 u32 len; 184 int cnt; 185 } s_shared[8]; 186 187 /* 188 * ntfs_set_shared 189 * 190 * Return: 191 * * @ptr - If pointer was saved in shared memory. 192 * * NULL - If pointer was not shared. 193 */ 194 void *ntfs_set_shared(void *ptr, u32 bytes) 195 { 196 void *ret = NULL; 197 int i, j = -1; 198 199 spin_lock_bh(&s_shared_lock); 200 for (i = 0; i < ARRAY_SIZE(s_shared); i++) { 201 if (!s_shared[i].cnt) { 202 j = i; 203 } else if (bytes == s_shared[i].len && 204 !memcmp(s_shared[i].ptr, ptr, bytes)) { 205 s_shared[i].cnt += 1; 206 ret = s_shared[i].ptr; 207 break; 208 } 209 } 210 211 if (!ret && j != -1) { 212 s_shared[j].ptr = ptr; 213 s_shared[j].len = bytes; 214 s_shared[j].cnt = 1; 215 ret = ptr; 216 } 217 spin_unlock_bh(&s_shared_lock); 218 219 return ret; 220 } 221 222 /* 223 * ntfs_put_shared 224 * 225 * Return: 226 * * @ptr - If pointer is not shared anymore. 227 * * NULL - If pointer is still shared. 228 */ 229 void *ntfs_put_shared(void *ptr) 230 { 231 void *ret = ptr; 232 int i; 233 234 spin_lock_bh(&s_shared_lock); 235 for (i = 0; i < ARRAY_SIZE(s_shared); i++) { 236 if (s_shared[i].cnt && s_shared[i].ptr == ptr) { 237 if (--s_shared[i].cnt) 238 ret = NULL; 239 break; 240 } 241 } 242 spin_unlock_bh(&s_shared_lock); 243 244 return ret; 245 } 246 247 static inline void put_mount_options(struct ntfs_mount_options *options) 248 { 249 kfree(options->nls_name); 250 unload_nls(options->nls); 251 kfree(options); 252 } 253 254 static void put_mount_options_rcu(struct rcu_head *head) 255 { 256 put_mount_options(container_of(head, struct ntfs_mount_options, rcu)); 257 } 258 259 enum Opt { 260 Opt_uid, 261 Opt_gid, 262 Opt_umask, 263 Opt_dmask, 264 Opt_fmask, 265 Opt_immutable, 266 Opt_discard, 267 Opt_force, 268 Opt_sparse, 269 Opt_nohidden, 270 Opt_hide_dot_files, 271 Opt_windows_names, 272 Opt_showmeta, 273 Opt_acl, 274 Opt_acl_bool, 275 Opt_iocharset, 276 Opt_prealloc, 277 Opt_prealloc_bool, 278 Opt_nocase, 279 Opt_delalloc, 280 Opt_delalloc_bool, 281 Opt_ads, 282 Opt_ads_bool, 283 Opt_err, 284 }; 285 286 // clang-format off 287 static const struct fs_parameter_spec ntfs_fs_parameters[] = { 288 fsparam_uid("uid", Opt_uid), 289 fsparam_gid("gid", Opt_gid), 290 fsparam_u32oct("umask", Opt_umask), 291 fsparam_u32oct("dmask", Opt_dmask), 292 fsparam_u32oct("fmask", Opt_fmask), 293 fsparam_flag("sys_immutable", Opt_immutable), 294 fsparam_flag("discard", Opt_discard), 295 fsparam_flag("force", Opt_force), 296 fsparam_flag("sparse", Opt_sparse), 297 fsparam_flag("nohidden", Opt_nohidden), 298 fsparam_flag("hide_dot_files", Opt_hide_dot_files), 299 fsparam_flag("windows_names", Opt_windows_names), 300 fsparam_flag("showmeta", Opt_showmeta), 301 fsparam_flag("acl", Opt_acl), 302 fsparam_bool("acl", Opt_acl_bool), 303 fsparam_string("iocharset", Opt_iocharset), 304 fsparam_flag("prealloc", Opt_prealloc), 305 fsparam_bool("prealloc", Opt_prealloc_bool), 306 fsparam_flag("nocase", Opt_nocase), 307 fsparam_flag("delalloc", Opt_delalloc), 308 fsparam_bool("delalloc", Opt_delalloc_bool), 309 fsparam_flag("ads", Opt_ads), 310 fsparam_bool("ads", Opt_ads_bool), 311 {} 312 }; 313 // clang-format on 314 315 /* 316 * Load nls table or if @nls is utf8 then return NULL. 317 * 318 */ 319 static struct nls_table *ntfs_load_nls(const char *nls) 320 { 321 struct nls_table *ret; 322 323 if (!nls) 324 nls = CONFIG_NLS_DEFAULT; 325 326 if (strcmp(nls, "utf8") == 0) 327 return NULL; 328 329 if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0) 330 return load_nls_default(); 331 332 ret = load_nls(nls); 333 if (ret) 334 return ret; 335 336 return ERR_PTR(-EINVAL); 337 } 338 339 static int ntfs_fs_parse_param(struct fs_context *fc, 340 struct fs_parameter *param) 341 { 342 struct ntfs_mount_options *opts = fc->fs_private; 343 struct fs_parse_result result; 344 int opt; 345 346 opt = fs_parse(fc, ntfs_fs_parameters, param, &result); 347 if (opt < 0) 348 return opt; 349 350 switch (opt) { 351 case Opt_uid: 352 opts->fs_uid = result.uid; 353 break; 354 case Opt_gid: 355 opts->fs_gid = result.gid; 356 break; 357 case Opt_umask: 358 if (result.uint_32 & ~07777) 359 return invalf(fc, "ntfs3: Invalid value for umask."); 360 opts->fs_fmask_inv = ~result.uint_32; 361 opts->fs_dmask_inv = ~result.uint_32; 362 opts->fmask = 1; 363 opts->dmask = 1; 364 break; 365 case Opt_dmask: 366 if (result.uint_32 & ~07777) 367 return invalf(fc, "ntfs3: Invalid value for dmask."); 368 opts->fs_dmask_inv = ~result.uint_32; 369 opts->dmask = 1; 370 break; 371 case Opt_fmask: 372 if (result.uint_32 & ~07777) 373 return invalf(fc, "ntfs3: Invalid value for fmask."); 374 opts->fs_fmask_inv = ~result.uint_32; 375 opts->fmask = 1; 376 break; 377 case Opt_immutable: 378 opts->sys_immutable = 1; 379 break; 380 case Opt_discard: 381 opts->discard = 1; 382 break; 383 case Opt_force: 384 opts->force = 1; 385 break; 386 case Opt_sparse: 387 opts->sparse = 1; 388 break; 389 case Opt_nohidden: 390 opts->nohidden = 1; 391 break; 392 case Opt_hide_dot_files: 393 opts->hide_dot_files = 1; 394 break; 395 case Opt_windows_names: 396 opts->windows_names = 1; 397 break; 398 case Opt_showmeta: 399 opts->showmeta = 1; 400 break; 401 case Opt_acl_bool: 402 if (result.boolean) { 403 fallthrough; 404 case Opt_acl: 405 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 406 fc->sb_flags |= SB_POSIXACL; 407 #else 408 return invalf( 409 fc, "ntfs3: Support for ACL not compiled in!"); 410 #endif 411 } else 412 fc->sb_flags &= ~SB_POSIXACL; 413 break; 414 case Opt_iocharset: 415 kfree(opts->nls_name); 416 opts->nls_name = param->string; 417 param->string = NULL; 418 break; 419 case Opt_prealloc: 420 opts->prealloc = 1; 421 break; 422 case Opt_prealloc_bool: 423 opts->prealloc = result.boolean; 424 break; 425 case Opt_nocase: 426 opts->nocase = 1; 427 break; 428 case Opt_delalloc: 429 opts->delalloc = 1; 430 break; 431 case Opt_delalloc_bool: 432 opts->delalloc = result.boolean; 433 break; 434 case Opt_ads: 435 opts->ads = 1; 436 break; 437 case Opt_ads_bool: 438 opts->ads = result.boolean; 439 break; 440 default: 441 /* Should not be here unless we forget add case. */ 442 return -EINVAL; 443 } 444 return 0; 445 } 446 447 static int ntfs_fs_reconfigure(struct fs_context *fc) 448 { 449 struct super_block *sb = fc->root->d_sb; 450 struct ntfs_sb_info *sbi = sb->s_fs_info; 451 struct ntfs_mount_options *new_opts = fc->fs_private; 452 struct ntfs_mount_options *old_opts; 453 int ro_rw; 454 455 ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY); 456 if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { 457 errorf(fc, 458 "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n"); 459 return -EINVAL; 460 } 461 462 new_opts->nls = ntfs_load_nls(new_opts->nls_name); 463 if (IS_ERR(new_opts->nls)) { 464 new_opts->nls = NULL; 465 errorf(fc, "ntfs3: Cannot load iocharset %s", 466 new_opts->nls_name); 467 return -EINVAL; 468 } 469 if (new_opts->nls != sbi->options->nls) 470 return invalf( 471 fc, 472 "ntfs3: Cannot use different iocharset when remounting!"); 473 474 if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) && 475 !new_opts->force) { 476 errorf(fc, 477 "ntfs3: Volume is dirty and \"force\" flag is not set!"); 478 return -EINVAL; 479 } 480 481 sync_filesystem(sb); 482 old_opts = sbi->options; 483 /* pairs with the READ_ONCE() in ntfs_nls_to_utf16() */ 484 smp_store_release(&sbi->options, new_opts); 485 fc->fs_private = NULL; 486 /* 487 * ntfs_d_hash() and ntfs_d_compare() of a pathwalk in rcu mode may 488 * still read the old options through the sbi. 489 */ 490 call_rcu(&old_opts->rcu, put_mount_options_rcu); 491 492 return 0; 493 } 494 495 #ifdef CONFIG_PROC_FS 496 static struct proc_dir_entry *proc_info_root; 497 498 /* 499 * ntfs3_volinfo: 500 * 501 * The content of /proc/fs/ntfs3/<dev>/volinfo 502 * 503 * ntfs3.1 504 * cluster size 505 * number of clusters 506 * total number of mft records 507 * number of used mft records ~= number of files + folders 508 * real state of ntfs "dirty"/"clean" 509 * current state of ntfs "dirty"/"clean" 510 */ 511 static int ntfs3_volinfo(struct seq_file *m, void *o) 512 { 513 struct super_block *sb = m->private; 514 struct ntfs_sb_info *sbi = sb->s_fs_info; 515 516 seq_printf(m, "ntfs%d.%d\n%u\n%zu\n%zu\n%zu\n%s\n%s\n", 517 sbi->volume.major_ver, sbi->volume.minor_ver, 518 sbi->cluster_size, sbi->used.bitmap.nbits, 519 sbi->mft.bitmap.nbits, 520 sbi->mft.bitmap.nbits - wnd_zeroes(&sbi->mft.bitmap), 521 sbi->volume.real_dirty ? "dirty" : "clean", 522 (sbi->volume.flags & VOLUME_FLAG_DIRTY) ? "dirty" : "clean"); 523 524 return 0; 525 } 526 527 static int ntfs3_volinfo_open(struct inode *inode, struct file *file) 528 { 529 return single_open(file, ntfs3_volinfo, pde_data(inode)); 530 } 531 532 /* read /proc/fs/ntfs3/<dev>/label */ 533 static int ntfs3_label_show(struct seq_file *m, void *o) 534 { 535 struct super_block *sb = m->private; 536 struct ntfs_sb_info *sbi = sb->s_fs_info; 537 538 seq_printf(m, "%s\n", sbi->volume.label); 539 540 return 0; 541 } 542 543 /* write /proc/fs/ntfs3/<dev>/label */ 544 static ssize_t ntfs3_label_write(struct file *file, const char __user *buffer, 545 size_t count, loff_t *ppos) 546 { 547 int err; 548 struct super_block *sb = pde_data(file_inode(file)); 549 ssize_t ret = count; 550 u8 *label; 551 552 if (sb_rdonly(sb)) 553 return -EROFS; 554 555 label = kmalloc(count, GFP_NOFS); 556 557 if (!label) 558 return -ENOMEM; 559 560 if (copy_from_user(label, buffer, ret)) { 561 ret = -EFAULT; 562 goto out; 563 } 564 while (ret > 0 && label[ret - 1] == '\n') 565 ret -= 1; 566 567 err = ntfs_set_label(sb->s_fs_info, label, ret); 568 569 if (err < 0) { 570 ntfs_err(sb, "failed (%d) to write label", err); 571 ret = err; 572 goto out; 573 } 574 575 *ppos += count; 576 ret = count; 577 out: 578 kfree(label); 579 return ret; 580 } 581 582 static int ntfs3_label_open(struct inode *inode, struct file *file) 583 { 584 return single_open(file, ntfs3_label_show, pde_data(inode)); 585 } 586 587 static const struct proc_ops ntfs3_volinfo_fops = { 588 .proc_read = seq_read, 589 .proc_lseek = seq_lseek, 590 .proc_release = single_release, 591 .proc_open = ntfs3_volinfo_open, 592 }; 593 594 static const struct proc_ops ntfs3_label_fops = { 595 .proc_read = seq_read, 596 .proc_lseek = seq_lseek, 597 .proc_release = single_release, 598 .proc_open = ntfs3_label_open, 599 .proc_write = ntfs3_label_write, 600 }; 601 602 static void ntfs_create_procdir(struct super_block *sb) 603 { 604 struct proc_dir_entry *e; 605 606 if (!proc_info_root) 607 return; 608 609 e = proc_mkdir(sb->s_id, proc_info_root); 610 if (e) { 611 struct ntfs_sb_info *sbi = sb->s_fs_info; 612 613 proc_create_data("volinfo", 0444, e, &ntfs3_volinfo_fops, sb); 614 proc_create_data("label", 0644, e, &ntfs3_label_fops, sb); 615 sbi->procdir = e; 616 } 617 } 618 619 static void ntfs_remove_procdir(struct super_block *sb) 620 { 621 struct ntfs_sb_info *sbi = sb->s_fs_info; 622 623 if (!sbi->procdir) 624 return; 625 626 remove_proc_entry("label", sbi->procdir); 627 remove_proc_entry("volinfo", sbi->procdir); 628 remove_proc_entry(sb->s_id, proc_info_root); 629 sbi->procdir = NULL; 630 } 631 632 static void ntfs_create_proc_root(void) 633 { 634 proc_info_root = proc_mkdir("fs/ntfs3", NULL); 635 } 636 637 static void ntfs_remove_proc_root(void) 638 { 639 if (proc_info_root) { 640 remove_proc_entry("fs/ntfs3", NULL); 641 proc_info_root = NULL; 642 } 643 } 644 #else 645 // clang-format off 646 static void ntfs_create_procdir(struct super_block *sb){} 647 static void ntfs_remove_procdir(struct super_block *sb){} 648 static void ntfs_create_proc_root(void){} 649 static void ntfs_remove_proc_root(void){} 650 // clang-format on 651 #endif 652 653 static struct kmem_cache *ntfs_inode_cachep; 654 655 static struct inode *ntfs_alloc_inode(struct super_block *sb) 656 { 657 struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS); 658 659 if (!ni) 660 return NULL; 661 662 memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode)); 663 mutex_init(&ni->ni_lock); 664 return &ni->vfs_inode; 665 } 666 667 static void ntfs_free_inode(struct inode *inode) 668 { 669 struct ntfs_inode *ni = ntfs_i(inode); 670 671 mutex_destroy(&ni->ni_lock); 672 kmem_cache_free(ntfs_inode_cachep, ni); 673 } 674 675 static void init_once(void *foo) 676 { 677 struct ntfs_inode *ni = foo; 678 679 inode_init_once(&ni->vfs_inode); 680 } 681 682 /* 683 * Noinline to reduce binary size. 684 */ 685 static noinline void ntfs3_put_sbi(struct ntfs_sb_info *sbi) 686 { 687 wnd_close(&sbi->mft.bitmap); 688 wnd_close(&sbi->used.bitmap); 689 690 if (sbi->mft.ni) { 691 iput(&sbi->mft.ni->vfs_inode); 692 sbi->mft.ni = NULL; 693 } 694 695 if (sbi->security.ni) { 696 iput(&sbi->security.ni->vfs_inode); 697 sbi->security.ni = NULL; 698 } 699 700 if (sbi->reparse.ni) { 701 iput(&sbi->reparse.ni->vfs_inode); 702 sbi->reparse.ni = NULL; 703 } 704 705 if (sbi->objid.ni) { 706 iput(&sbi->objid.ni->vfs_inode); 707 sbi->objid.ni = NULL; 708 } 709 710 if (sbi->volume.ni) { 711 iput(&sbi->volume.ni->vfs_inode); 712 sbi->volume.ni = NULL; 713 } 714 715 ntfs_update_mftmirr(sbi); 716 717 indx_clear(&sbi->security.index_sii); 718 indx_clear(&sbi->security.index_sdh); 719 indx_clear(&sbi->reparse.index_r); 720 indx_clear(&sbi->objid.index_o); 721 } 722 723 static void ntfs3_free_sbi(struct ntfs_sb_info *sbi) 724 { 725 if (sbi->options) 726 put_mount_options(sbi->options); 727 kfree(sbi->new_rec); 728 kvfree(ntfs_put_shared(sbi->upcase)); 729 kvfree(sbi->def_table); 730 kfree(sbi->compress.lznt); 731 #ifdef CONFIG_NTFS3_LZX_XPRESS 732 xpress_free_decompressor(sbi->compress.xpress); 733 lzx_free_decompressor(sbi->compress.lzx); 734 #endif 735 kfree(sbi); 736 } 737 738 static void ntfs3_free_sbi_rcu(struct rcu_head *head) 739 { 740 ntfs3_free_sbi(container_of(head, struct ntfs_sb_info, rcu)); 741 } 742 743 static void ntfs_put_super(struct super_block *sb) 744 { 745 struct ntfs_sb_info *sbi = sb->s_fs_info; 746 747 ntfs_remove_procdir(sb); 748 749 /* Mark rw ntfs as clear, if possible. */ 750 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); 751 752 /* 753 * The mount options stay until the sbi is freed: ->d_hash() and 754 * ->d_compare() of a pathwalk in rcu mode read the nls table through 755 * them. 756 */ 757 ntfs3_put_sbi(sbi); 758 } 759 760 static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf) 761 { 762 struct super_block *sb = dentry->d_sb; 763 struct ntfs_sb_info *sbi = sb->s_fs_info; 764 struct wnd_bitmap *wnd = &sbi->used.bitmap; 765 CLST da_clusters = ntfs_get_da(sbi); 766 767 buf->f_type = sb->s_magic; 768 buf->f_bsize = buf->f_frsize = sbi->cluster_size; 769 buf->f_blocks = wnd->nbits; 770 771 buf->f_bfree = wnd_zeroes(wnd); 772 if (buf->f_bfree > da_clusters) { 773 buf->f_bfree -= da_clusters; 774 } else { 775 buf->f_bfree = 0; 776 } 777 buf->f_bavail = buf->f_bfree; 778 779 buf->f_fsid.val[0] = sbi->volume.ser_num; 780 buf->f_fsid.val[1] = sbi->volume.ser_num >> 32; 781 buf->f_namelen = NTFS_NAME_LEN; 782 783 return 0; 784 } 785 786 static int ntfs_show_options(struct seq_file *m, struct dentry *root) 787 { 788 struct super_block *sb = root->d_sb; 789 struct ntfs_sb_info *sbi = sb->s_fs_info; 790 struct ntfs_mount_options *opts = sbi->options; 791 struct user_namespace *user_ns = seq_user_ns(m); 792 793 seq_printf(m, ",uid=%u", from_kuid_munged(user_ns, opts->fs_uid)); 794 seq_printf(m, ",gid=%u", from_kgid_munged(user_ns, opts->fs_gid)); 795 if (opts->dmask) 796 seq_printf(m, ",dmask=%04o", opts->fs_dmask_inv ^ 0xffff); 797 if (opts->fmask) 798 seq_printf(m, ",fmask=%04o", opts->fs_fmask_inv ^ 0xffff); 799 if (opts->sys_immutable) 800 seq_puts(m, ",sys_immutable"); 801 if (opts->discard) 802 seq_puts(m, ",discard"); 803 if (opts->force) 804 seq_puts(m, ",force"); 805 if (opts->sparse) 806 seq_puts(m, ",sparse"); 807 if (opts->nohidden) 808 seq_puts(m, ",nohidden"); 809 if (opts->hide_dot_files) 810 seq_puts(m, ",hide_dot_files"); 811 if (opts->windows_names) 812 seq_puts(m, ",windows_names"); 813 if (opts->showmeta) 814 seq_puts(m, ",showmeta"); 815 if (sb->s_flags & SB_POSIXACL) 816 seq_puts(m, ",acl"); 817 if (opts->nls) 818 seq_printf(m, ",iocharset=%s", opts->nls->charset); 819 else 820 seq_puts(m, ",iocharset=utf8"); 821 if (opts->prealloc) 822 seq_puts(m, ",prealloc"); 823 if (opts->nocase) 824 seq_puts(m, ",nocase"); 825 if (opts->delalloc) 826 seq_puts(m, ",delalloc"); 827 if (opts->ads) 828 seq_puts(m, ",ads"); 829 830 return 0; 831 } 832 833 /* 834 * ntfs_shutdown - super_operations::shutdown 835 */ 836 static void ntfs_shutdown(struct super_block *sb) 837 { 838 set_bit(NTFS_FLAGS_SHUTDOWN_BIT, &ntfs_sb(sb)->flags); 839 } 840 841 /* 842 * ntfs_sync_fs - super_operations::sync_fs 843 */ 844 static int ntfs_sync_fs(struct super_block *sb, int wait) 845 { 846 int err = 0, err2; 847 struct ntfs_sb_info *sbi = sb->s_fs_info; 848 struct ntfs_inode *ni; 849 struct inode *inode; 850 851 if (unlikely(ntfs3_forced_shutdown(sb))) 852 return -EIO; 853 854 ni = sbi->security.ni; 855 if (ni) { 856 inode = &ni->vfs_inode; 857 err2 = _ni_write_inode(inode, wait); 858 if (err2 && !err) 859 err = err2; 860 } 861 862 ni = sbi->objid.ni; 863 if (ni) { 864 inode = &ni->vfs_inode; 865 err2 = _ni_write_inode(inode, wait); 866 if (err2 && !err) 867 err = err2; 868 } 869 870 ni = sbi->reparse.ni; 871 if (ni) { 872 inode = &ni->vfs_inode; 873 err2 = _ni_write_inode(inode, wait); 874 if (err2 && !err) 875 err = err2; 876 } 877 878 if (!err) 879 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); 880 881 ntfs_update_mftmirr(sbi); 882 883 if (wait) { 884 sync_blockdev(sb->s_bdev); 885 blkdev_issue_flush(sb->s_bdev); 886 } 887 888 return err; 889 } 890 891 static const struct super_operations ntfs_sops = { 892 .alloc_inode = ntfs_alloc_inode, 893 .free_inode = ntfs_free_inode, 894 .evict_inode = ntfs_evict_inode, 895 .put_super = ntfs_put_super, 896 .statfs = ntfs_statfs, 897 .show_options = ntfs_show_options, 898 .shutdown = ntfs_shutdown, 899 .sync_fs = ntfs_sync_fs, 900 .write_inode = ntfs3_write_inode, 901 }; 902 903 static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino, 904 u32 generation) 905 { 906 struct MFT_REF ref; 907 struct inode *inode; 908 909 ref.low = cpu_to_le32(ino); 910 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 911 ref.high = cpu_to_le16(ino >> 32); 912 #else 913 ref.high = 0; 914 #endif 915 ref.seq = cpu_to_le16(generation); 916 917 inode = ntfs_iget5(sb, &ref, NULL); 918 if (!IS_ERR(inode) && is_bad_inode(inode)) { 919 iput(inode); 920 inode = ERR_PTR(-ESTALE); 921 } 922 923 return inode; 924 } 925 926 static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid, 927 int fh_len, int fh_type) 928 { 929 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 930 ntfs_export_get_inode); 931 } 932 933 static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid, 934 int fh_len, int fh_type) 935 { 936 return generic_fh_to_parent(sb, fid, fh_len, fh_type, 937 ntfs_export_get_inode); 938 } 939 940 /* TODO: == ntfs_sync_inode */ 941 static int ntfs_nfs_commit_metadata(struct inode *inode) 942 { 943 return _ni_write_inode(inode, 1); 944 } 945 946 static const struct export_operations ntfs_export_ops = { 947 .encode_fh = generic_encode_ino32_fh, 948 .fh_to_dentry = ntfs_fh_to_dentry, 949 .fh_to_parent = ntfs_fh_to_parent, 950 .get_parent = ntfs3_get_parent, 951 .commit_metadata = ntfs_nfs_commit_metadata, 952 }; 953 954 /* 955 * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb". 956 */ 957 static u32 format_size_gb(const u64 bytes, u32 *mb) 958 { 959 /* Do simple right 30 bit shift of 64 bit value. */ 960 u64 kbytes = bytes >> 10; 961 u32 kbytes32 = kbytes; 962 963 *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20; 964 if (*mb >= 100) 965 *mb = 99; 966 967 return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12); 968 } 969 970 static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot) 971 { 972 if (boot->sectors_per_clusters <= 0x80) 973 return boot->sectors_per_clusters; 974 if (boot->sectors_per_clusters >= 0xf4) /* limit shift to 2MB max */ 975 return 1U << (-(s8)boot->sectors_per_clusters); 976 return -EINVAL; 977 } 978 979 /* 980 * ntfs_init_from_boot - Init internal info from on-disk boot sector. 981 * 982 * NTFS mount begins from boot - special formatted 512 bytes. 983 * There are two boots: the first and the last 512 bytes of volume. 984 * The content of boot is not changed during ntfs life. 985 * 986 * NOTE: ntfs.sys checks only first (primary) boot. 987 * chkdsk checks both boots. 988 */ 989 static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, 990 u64 dev_size, struct NTFS_BOOT **boot2) 991 { 992 struct ntfs_sb_info *sbi = sb->s_fs_info; 993 int err; 994 u32 mb, gb, boot_sector_size, sct_per_clst, record_size; 995 u64 sectors, clusters, mlcn, mlcn2, mft_pos, mft2_pos, dev_size0; 996 struct NTFS_BOOT *boot; 997 struct buffer_head *bh; 998 struct MFT_REC *rec; 999 u16 fn, ao; 1000 u8 cluster_bits; 1001 u32 boot_off = 0; 1002 sector_t boot_block = 0; 1003 const char *hint = "Primary boot"; 1004 1005 /* Save original dev_size. Used with alternative boot. */ 1006 dev_size0 = dev_size; 1007 1008 sbi->volume.blocks = dev_size >> PAGE_SHIFT; 1009 1010 /* Set dummy blocksize to read boot_block. */ 1011 if (!sb_min_blocksize(sb, PAGE_SIZE)) { 1012 return -EINVAL; 1013 } 1014 1015 read_boot: 1016 bh = ntfs_bread(sb, boot_block); 1017 if (!bh) 1018 return boot_block ? -EINVAL : -EIO; 1019 1020 err = -EINVAL; 1021 1022 /* Corrupted image; do not read OOB */ 1023 if (bh->b_size - sizeof(*boot) < boot_off) 1024 goto out; 1025 1026 boot = (struct NTFS_BOOT *)Add2Ptr(bh->b_data, boot_off); 1027 1028 if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) { 1029 ntfs_err(sb, "%s signature is not NTFS.", hint); 1030 goto out; 1031 } 1032 1033 /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/ 1034 /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1]) 1035 * goto out; 1036 */ 1037 1038 boot_sector_size = ((u32)boot->bytes_per_sector[1] << 8) | 1039 boot->bytes_per_sector[0]; 1040 if (boot_sector_size < SECTOR_SIZE || 1041 !is_power_of_2(boot_sector_size)) { 1042 ntfs_err(sb, "%s: invalid bytes per sector %u.", hint, 1043 boot_sector_size); 1044 goto out; 1045 } 1046 1047 /* cluster size: 512, 1K, 2K, 4K, ... 2M */ 1048 sct_per_clst = true_sectors_per_clst(boot); 1049 if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) { 1050 ntfs_err(sb, "%s: invalid sectors per cluster %u.", hint, 1051 sct_per_clst); 1052 goto out; 1053 } 1054 1055 sbi->cluster_size = boot_sector_size * sct_per_clst; 1056 sbi->cluster_bits = cluster_bits = blksize_bits(sbi->cluster_size); 1057 sbi->cluster_mask = sbi->cluster_size - 1; 1058 sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask; 1059 1060 mlcn = le64_to_cpu(boot->mft_clst); 1061 mlcn2 = le64_to_cpu(boot->mft2_clst); 1062 sectors = le64_to_cpu(boot->sectors_per_volume); 1063 1064 /* 1065 * Convert mlcn/mlcn2 to sector positions before comparing with 1066 * 'sectors'. All three are u64 values that come from the boot 1067 * sector, so use check_mul_overflow() to keep a wraparound from 1068 * silently bypassing the comparison. 1069 */ 1070 if (check_mul_overflow(mlcn, (u64)sct_per_clst, &mft_pos) || 1071 check_mul_overflow(mlcn2, (u64)sct_per_clst, &mft2_pos) || 1072 mft_pos >= sectors || mft2_pos >= sectors) { 1073 ntfs_err( 1074 sb, 1075 "%s: start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.", 1076 hint, mlcn, mlcn2, sectors); 1077 goto out; 1078 } 1079 1080 if (boot->record_size >= 0) { 1081 record_size = (u32)boot->record_size << cluster_bits; 1082 } else if (-boot->record_size <= MAXIMUM_SHIFT_BYTES_PER_MFT) { 1083 record_size = 1u << (-boot->record_size); 1084 } else { 1085 ntfs_err(sb, "%s: invalid record size %d.", hint, 1086 boot->record_size); 1087 goto out; 1088 } 1089 1090 sbi->record_size = record_size; 1091 sbi->record_bits = blksize_bits(record_size); 1092 sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes 1093 1094 /* Check MFT record size. */ 1095 if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) { 1096 ntfs_err(sb, "%s: invalid bytes per MFT record %u (%d).", hint, 1097 record_size, boot->record_size); 1098 goto out; 1099 } 1100 1101 if (record_size > MAXIMUM_BYTES_PER_MFT) { 1102 ntfs_err(sb, "Unsupported bytes per MFT record %u.", 1103 record_size); 1104 goto out; 1105 } 1106 1107 if (boot->index_size >= 0) { 1108 sbi->index_size = (u32)boot->index_size << cluster_bits; 1109 } else if (-boot->index_size <= MAXIMUM_SHIFT_BYTES_PER_INDEX) { 1110 sbi->index_size = 1u << (-boot->index_size); 1111 } else { 1112 ntfs_err(sb, "%s: invalid index size %d.", hint, 1113 boot->index_size); 1114 goto out; 1115 } 1116 1117 /* Check index record size. */ 1118 if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) { 1119 ntfs_err(sb, "%s: invalid bytes per index %u(%d).", hint, 1120 sbi->index_size, boot->index_size); 1121 goto out; 1122 } 1123 1124 if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) { 1125 ntfs_err(sb, "%s: unsupported bytes per index %u.", hint, 1126 sbi->index_size); 1127 goto out; 1128 } 1129 1130 sbi->volume.size = sectors * boot_sector_size; 1131 1132 gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb); 1133 1134 /* 1135 * - Volume formatted and mounted with the same sector size. 1136 * - Volume formatted 4K and mounted as 512. 1137 * - Volume formatted 512 and mounted as 4K. 1138 */ 1139 if (boot_sector_size != sector_size) { 1140 ntfs_warn( 1141 sb, 1142 "Different NTFS sector size (%u) and media sector size (%u).", 1143 boot_sector_size, sector_size); 1144 dev_size += sector_size - 1; 1145 } 1146 1147 sbi->bdev_blocksize = max(boot_sector_size, sector_size); 1148 sbi->mft.lbo = mlcn << cluster_bits; 1149 sbi->mft.lbo2 = mlcn2 << cluster_bits; 1150 1151 /* Compare boot's cluster and sector. */ 1152 if (sbi->cluster_size < boot_sector_size) { 1153 ntfs_err(sb, "%s: invalid bytes per cluster (%u).", hint, 1154 sbi->cluster_size); 1155 goto out; 1156 } 1157 1158 /* Compare boot's cluster and media sector. */ 1159 if (sbi->cluster_size < sector_size) { 1160 /* No way to use ntfs_get_block in this case. */ 1161 ntfs_err( 1162 sb, 1163 "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u).", 1164 sbi->cluster_size, sector_size); 1165 goto out; 1166 } 1167 1168 sbi->max_bytes_per_attr = 1169 record_size - ALIGN(MFTRECORD_FIXUP_OFFSET, 8) - 1170 ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) - 1171 ALIGN(sizeof(enum ATTR_TYPE), 8); 1172 1173 sbi->volume.ser_num = le64_to_cpu(boot->serial_num); 1174 1175 /* Warning if RAW volume. */ 1176 if (dev_size < sbi->volume.size + boot_sector_size) { 1177 u32 mb0, gb0; 1178 1179 gb0 = format_size_gb(dev_size, &mb0); 1180 ntfs_warn( 1181 sb, 1182 "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only.", 1183 gb, mb, gb0, mb0); 1184 sb->s_flags |= SB_RDONLY; 1185 } 1186 1187 clusters = sbi->volume.size >> cluster_bits; 1188 #ifndef CONFIG_NTFS3_64BIT_CLUSTER 1189 /* 32 bits per cluster. */ 1190 if (clusters >> 32) { 1191 ntfs_notice( 1192 sb, 1193 "NTFS %u.%02u Gb is too big to use 32 bits per cluster.", 1194 gb, mb); 1195 goto out; 1196 } 1197 #elif BITS_PER_LONG < 64 1198 #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS" 1199 #endif 1200 1201 sbi->used.bitmap.nbits = clusters; 1202 1203 rec = kzalloc(record_size, GFP_NOFS); 1204 if (!rec) { 1205 err = -ENOMEM; 1206 goto out; 1207 } 1208 1209 sbi->new_rec = rec; 1210 rec->rhdr.sign = NTFS_FILE_SIGNATURE; 1211 rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET); 1212 fn = (sbi->record_size >> SECTOR_SHIFT) + 1; 1213 rec->rhdr.fix_num = cpu_to_le16(fn); 1214 ao = ALIGN(MFTRECORD_FIXUP_OFFSET + sizeof(short) * fn, 8); 1215 rec->attr_off = cpu_to_le16(ao); 1216 rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8)); 1217 rec->total = cpu_to_le32(sbi->record_size); 1218 ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END; 1219 1220 if (!sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE))) { 1221 err = -EINVAL; 1222 goto out; 1223 } 1224 1225 sbi->block_mask = sb->s_blocksize - 1; 1226 sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits; 1227 sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits; 1228 1229 /* Maximum size for normal files. */ 1230 sbi->maxbytes = (clusters << cluster_bits) - 1; 1231 1232 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 1233 if (clusters >= (1ull << (64 - cluster_bits))) 1234 sbi->maxbytes = -1; 1235 sbi->maxbytes_sparse = MAX_LFS_FILESIZE; 1236 sb->s_maxbytes = MAX_LFS_FILESIZE; 1237 #else 1238 /* Maximum size for sparse file. */ 1239 sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1; 1240 sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits; 1241 #endif 1242 1243 /* 1244 * Compute the MFT zone at two steps. 1245 * It would be nice if we are able to allocate 1/8 of 1246 * total clusters for MFT but not more then 512 MB. 1247 */ 1248 sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3); 1249 1250 err = 0; 1251 1252 if (bh->b_blocknr && !sb_rdonly(sb)) { 1253 /* 1254 * Alternative boot is ok but primary is not ok. 1255 * Do not update primary boot here 'cause it may be faked boot. 1256 * Let ntfs to be mounted and update boot later. 1257 */ 1258 *boot2 = kmemdup(boot, sizeof(*boot), GFP_NOFS | __GFP_NOWARN); 1259 } 1260 1261 out: 1262 brelse(bh); 1263 1264 if (err == -EINVAL && !boot_block && dev_size0 > PAGE_SHIFT) { 1265 u32 block_size = min_t(u32, sector_size, PAGE_SIZE); 1266 u64 lbo = dev_size0 - sizeof(*boot); 1267 1268 boot_block = lbo >> blksize_bits(block_size); 1269 boot_off = lbo & (block_size - 1); 1270 if (boot_block && block_size >= boot_off + sizeof(*boot)) { 1271 /* 1272 * Try alternative boot (last sector) 1273 */ 1274 if (!sb_set_blocksize(sb, block_size)) 1275 return -EINVAL; 1276 hint = "Alternative boot"; 1277 dev_size = dev_size0; /* restore original size. */ 1278 goto read_boot; 1279 } 1280 } 1281 1282 return err; 1283 } 1284 1285 /* 1286 * ntfs_fill_super - Try to mount. 1287 */ 1288 static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) 1289 { 1290 int err; 1291 struct ntfs_sb_info *sbi = sb->s_fs_info; 1292 struct block_device *bdev = sb->s_bdev; 1293 struct ntfs_mount_options *fc_opts; 1294 struct ntfs_mount_options *options = NULL; 1295 struct inode *inode; 1296 struct ntfs_inode *ni; 1297 size_t i, tt, bad_len, bad_frags; 1298 CLST vcn, lcn, len; 1299 struct ATTRIB *attr; 1300 const struct VOLUME_INFO *info; 1301 u32 done, bytes; 1302 struct ATTR_DEF_ENTRY *t; 1303 u16 *shared; 1304 struct MFT_REF ref; 1305 bool ro = sb_rdonly(sb); 1306 struct NTFS_BOOT *boot2 = NULL; 1307 1308 ref.high = 0; 1309 1310 sbi->sb = sb; 1311 fc_opts = fc->fs_private; 1312 if (!fc_opts) { 1313 errorf(fc, "missing mount options"); 1314 return -EINVAL; 1315 } 1316 options = kmemdup(fc_opts, sizeof(*fc_opts), GFP_KERNEL); 1317 if (!options) 1318 return -ENOMEM; 1319 1320 if (fc_opts->nls_name) { 1321 options->nls_name = kstrdup(fc_opts->nls_name, GFP_KERNEL); 1322 if (!options->nls_name) { 1323 kfree(options); 1324 return -ENOMEM; 1325 } 1326 } 1327 sbi->options = options; 1328 sb->s_flags |= SB_NODIRATIME; 1329 sb->s_magic = 0x7366746e; // "ntfs" 1330 sb->s_op = &ntfs_sops; 1331 sb->s_export_op = &ntfs_export_ops; 1332 sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec 1333 sb->s_xattr = ntfs_xattr_handlers; 1334 set_default_d_op(sb, options->nocase ? &ntfs_dentry_ops : NULL); 1335 1336 options->nls = ntfs_load_nls(options->nls_name); 1337 if (IS_ERR(options->nls)) { 1338 options->nls = NULL; 1339 errorf(fc, "Cannot load nls %s", options->nls_name); 1340 err = -EINVAL; 1341 goto out; 1342 } 1343 1344 if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) { 1345 sbi->discard_granularity = bdev_discard_granularity(bdev); 1346 sbi->discard_granularity_mask_inv = 1347 ~(u64)(sbi->discard_granularity - 1); 1348 } 1349 1350 /* Parse boot. */ 1351 err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev), 1352 bdev_nr_bytes(bdev), &boot2); 1353 if (err) 1354 goto out; 1355 1356 /* 1357 * Load $Volume. This should be done before $LogFile 1358 * 'cause 'sbi->volume.ni' is used in 'ntfs_set_state'. 1359 */ 1360 ref.low = cpu_to_le32(MFT_REC_VOL); 1361 ref.seq = cpu_to_le16(MFT_REC_VOL); 1362 inode = ntfs_iget5(sb, &ref, &NAME_VOLUME); 1363 if (IS_ERR(inode)) { 1364 err = PTR_ERR(inode); 1365 ntfs_err(sb, "Failed to load $Volume (%d).", err); 1366 goto out; 1367 } 1368 1369 ni = ntfs_i(inode); 1370 1371 /* Load and save label (not necessary). */ 1372 attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL); 1373 1374 if (!attr) { 1375 /* It is ok if no ATTR_LABEL */ 1376 } else if (!attr->non_res && !is_attr_ext(attr)) { 1377 /* $AttrDef allows labels to be up to 128 symbols. */ 1378 err = utf16s_to_utf8s(resident_data(attr), 1379 le32_to_cpu(attr->res.data_size) >> 1, 1380 UTF16_LITTLE_ENDIAN, sbi->volume.label, 1381 sizeof(sbi->volume.label)); 1382 if (err < 0) { 1383 sbi->volume.label[0] = 0; 1384 } else if (err >= sizeof(sbi->volume.label)) { 1385 sbi->volume.label[sizeof(sbi->volume.label) - 1] = 0; 1386 } else { 1387 sbi->volume.label[err] = 0; 1388 } 1389 } else { 1390 /* Should we break mounting here? */ 1391 //err = -EINVAL; 1392 //goto put_inode_out; 1393 } 1394 1395 attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL); 1396 if (!attr || is_attr_ext(attr) || 1397 !(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) { 1398 ntfs_err(sb, "$Volume is corrupted."); 1399 err = -EINVAL; 1400 goto put_inode_out; 1401 } 1402 1403 sbi->volume.major_ver = info->major_ver; 1404 sbi->volume.minor_ver = info->minor_ver; 1405 sbi->volume.flags = info->flags; 1406 sbi->volume.ni = ni; 1407 if (info->flags & VOLUME_FLAG_DIRTY) { 1408 sbi->volume.real_dirty = true; 1409 ntfs_info(sb, "It is recommended to use chkdsk."); 1410 } 1411 1412 /* Load $MFTMirr to estimate recs_mirr. */ 1413 ref.low = cpu_to_le32(MFT_REC_MIRR); 1414 ref.seq = cpu_to_le16(MFT_REC_MIRR); 1415 inode = ntfs_iget5(sb, &ref, &NAME_MIRROR); 1416 if (IS_ERR(inode)) { 1417 err = PTR_ERR(inode); 1418 ntfs_err(sb, "Failed to load $MFTMirr (%d).", err); 1419 goto out; 1420 } 1421 1422 sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >> 1423 sbi->record_bits; 1424 1425 iput(inode); 1426 1427 /* Load LogFile to replay. */ 1428 ref.low = cpu_to_le32(MFT_REC_LOG); 1429 ref.seq = cpu_to_le16(MFT_REC_LOG); 1430 inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); 1431 if (IS_ERR(inode)) { 1432 err = PTR_ERR(inode); 1433 ntfs_err(sb, "Failed to load \x24LogFile (%d).", err); 1434 goto out; 1435 } 1436 1437 ni = ntfs_i(inode); 1438 1439 err = ntfs_loadlog_and_replay(ni, sbi); 1440 if (err) 1441 goto put_inode_out; 1442 1443 iput(inode); 1444 1445 if ((sbi->flags & NTFS_FLAGS_NEED_REPLAY) && !ro) { 1446 ntfs_warn(sb, "failed to replay log file. Can't mount rw!"); 1447 err = -EINVAL; 1448 goto out; 1449 } 1450 1451 if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !options->force) { 1452 ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!"); 1453 err = -EINVAL; 1454 goto out; 1455 } 1456 1457 /* Load $MFT. */ 1458 ref.low = cpu_to_le32(MFT_REC_MFT); 1459 ref.seq = cpu_to_le16(1); 1460 1461 inode = ntfs_iget5(sb, &ref, &NAME_MFT); 1462 if (IS_ERR(inode)) { 1463 err = PTR_ERR(inode); 1464 ntfs_err(sb, "Failed to load $MFT (%d).", err); 1465 goto out; 1466 } 1467 1468 ni = ntfs_i(inode); 1469 1470 sbi->mft.used = ni->i_valid >> sbi->record_bits; 1471 tt = inode->i_size >> sbi->record_bits; 1472 sbi->mft.next_free = MFT_REC_USER; 1473 1474 err = ni_load_all_mi(ni); 1475 if (err) { 1476 ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err); 1477 goto put_inode_out; 1478 } 1479 1480 /* Merge MFT bitmap runs from extent records loaded by ni_load_all_mi. */ 1481 { 1482 struct ATTRIB *a = NULL; 1483 struct ATTR_LIST_ENTRY *le = NULL; 1484 1485 while ((a = ni_enum_attr_ex(ni, a, &le, NULL))) { 1486 CLST svcn, evcn; 1487 u16 roff; 1488 1489 if (a->type != ATTR_BITMAP || !a->non_res) 1490 continue; 1491 1492 svcn = le64_to_cpu(a->nres.svcn); 1493 if (!svcn) 1494 continue; /* Base record runs already loaded. */ 1495 1496 evcn = le64_to_cpu(a->nres.evcn); 1497 roff = le16_to_cpu(a->nres.run_off); 1498 1499 err = run_unpack_ex(&sbi->mft.bitmap.run, sbi, 1500 MFT_REC_MFT, svcn, evcn, svcn, 1501 Add2Ptr(a, roff), 1502 le32_to_cpu(a->size) - roff); 1503 if (err < 0) { 1504 ntfs_err( 1505 sb, 1506 "Failed to unpack $MFT bitmap extent (%d).", 1507 err); 1508 goto put_inode_out; 1509 } 1510 err = 0; 1511 } 1512 } 1513 1514 err = wnd_init(&sbi->mft.bitmap, sb, tt); 1515 if (err) 1516 goto put_inode_out; 1517 1518 sbi->mft.ni = ni; 1519 1520 /* Load $Bitmap. */ 1521 ref.low = cpu_to_le32(MFT_REC_BITMAP); 1522 ref.seq = cpu_to_le16(MFT_REC_BITMAP); 1523 inode = ntfs_iget5(sb, &ref, &NAME_BITMAP); 1524 if (IS_ERR(inode)) { 1525 err = PTR_ERR(inode); 1526 ntfs_err(sb, "Failed to load $Bitmap (%d).", err); 1527 goto out; 1528 } 1529 1530 #ifndef CONFIG_NTFS3_64BIT_CLUSTER 1531 if (inode->i_size >> 32) { 1532 err = -EINVAL; 1533 goto put_inode_out; 1534 } 1535 #endif 1536 1537 /* Check bitmap boundary. */ 1538 tt = sbi->used.bitmap.nbits; 1539 if (inode->i_size < ntfs3_bitmap_size(tt)) { 1540 ntfs_err(sb, "$Bitmap is corrupted."); 1541 err = -EINVAL; 1542 goto put_inode_out; 1543 } 1544 1545 err = wnd_init(&sbi->used.bitmap, sb, tt); 1546 if (err) { 1547 ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err); 1548 goto put_inode_out; 1549 } 1550 1551 iput(inode); 1552 1553 /* Compute the MFT zone. */ 1554 err = ntfs_refresh_zone(sbi); 1555 if (err) { 1556 ntfs_err(sb, "Failed to initialize MFT zone (%d).", err); 1557 goto out; 1558 } 1559 1560 /* Load $BadClus. */ 1561 ref.low = cpu_to_le32(MFT_REC_BADCLUST); 1562 ref.seq = cpu_to_le16(MFT_REC_BADCLUST); 1563 inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS); 1564 if (IS_ERR(inode)) { 1565 err = PTR_ERR(inode); 1566 ntfs_err(sb, "Failed to load $BadClus (%d).", err); 1567 goto out; 1568 } 1569 1570 ni = ntfs_i(inode); 1571 bad_len = bad_frags = 0; 1572 for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) { 1573 if (lcn == SPARSE_LCN) 1574 continue; 1575 1576 bad_len += len; 1577 bad_frags += 1; 1578 if (ro) 1579 continue; 1580 1581 if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) { 1582 /* Bad blocks marked as free in bitmap. */ 1583 ntfs_set_state(sbi, NTFS_DIRTY_ERROR); 1584 } 1585 } 1586 if (bad_len) { 1587 /* 1588 * Notice about bad blocks. 1589 * In normal cases these blocks are marked as used in bitmap. 1590 * And we never allocate space in it. 1591 */ 1592 ntfs_notice(sb, 1593 "Volume contains %zu bad blocks in %zu fragments.", 1594 bad_len, bad_frags); 1595 } 1596 iput(inode); 1597 1598 /* Load $AttrDef. */ 1599 ref.low = cpu_to_le32(MFT_REC_ATTR); 1600 ref.seq = cpu_to_le16(MFT_REC_ATTR); 1601 inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF); 1602 if (IS_ERR(inode)) { 1603 err = PTR_ERR(inode); 1604 ntfs_err(sb, "Failed to load $AttrDef (%d)", err); 1605 goto out; 1606 } 1607 1608 /* 1609 * Typical $AttrDef contains up to 20 entries. 1610 * Check for extremely large/small size. 1611 */ 1612 if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) || 1613 inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) { 1614 ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).", 1615 inode->i_size); 1616 err = -EINVAL; 1617 goto put_inode_out; 1618 } 1619 1620 bytes = inode->i_size; 1621 sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL); 1622 if (!t) { 1623 err = -ENOMEM; 1624 goto put_inode_out; 1625 } 1626 1627 /* Read the entire file. */ 1628 err = inode_read_data(inode, sbi->def_table, bytes); 1629 if (err) { 1630 ntfs_err(sb, "Failed to read $AttrDef (%d).", err); 1631 goto put_inode_out; 1632 } 1633 1634 if (ATTR_STD != t->type) { 1635 ntfs_err(sb, "$AttrDef is corrupted."); 1636 err = -EINVAL; 1637 goto put_inode_out; 1638 } 1639 1640 t += 1; 1641 sbi->def_entries = 1; 1642 done = sizeof(struct ATTR_DEF_ENTRY); 1643 1644 while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) { 1645 u32 t32 = le32_to_cpu(t->type); 1646 u64 sz = le64_to_cpu(t->max_sz); 1647 1648 if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32) 1649 break; 1650 1651 if (t->type == ATTR_REPARSE) 1652 sbi->reparse.max_size = sz; 1653 else if (t->type == ATTR_EA) 1654 sbi->ea_max_size = sz; 1655 1656 done += sizeof(struct ATTR_DEF_ENTRY); 1657 t += 1; 1658 sbi->def_entries += 1; 1659 } 1660 iput(inode); 1661 1662 /* Load $UpCase. */ 1663 ref.low = cpu_to_le32(MFT_REC_UPCASE); 1664 ref.seq = cpu_to_le16(MFT_REC_UPCASE); 1665 inode = ntfs_iget5(sb, &ref, &NAME_UPCASE); 1666 if (IS_ERR(inode)) { 1667 err = PTR_ERR(inode); 1668 ntfs_err(sb, "Failed to load $UpCase (%d).", err); 1669 goto out; 1670 } 1671 1672 if (inode->i_size != 0x10000 * sizeof(short)) { 1673 err = -EINVAL; 1674 ntfs_err(sb, "$UpCase is corrupted."); 1675 goto put_inode_out; 1676 } 1677 1678 /* Read the entire file. */ 1679 err = inode_read_data(inode, sbi->upcase, 0x10000 * sizeof(short)); 1680 if (err) { 1681 ntfs_err(sb, "Failed to read $UpCase (%d).", err); 1682 goto put_inode_out; 1683 } 1684 1685 #ifdef __BIG_ENDIAN 1686 { 1687 u16 *dst = sbi->upcase; 1688 1689 for (i = 0; i < 0x10000; i++) 1690 __swab16s(dst++); 1691 } 1692 #endif 1693 1694 shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short)); 1695 if (shared && sbi->upcase != shared) { 1696 kvfree(sbi->upcase); 1697 sbi->upcase = shared; 1698 } 1699 1700 iput(inode); 1701 1702 if (is_ntfs3(sbi)) { 1703 /* Load $Secure. */ 1704 err = ntfs_security_init(sbi); 1705 if (err) { 1706 ntfs_err(sb, "Failed to initialize $Secure (%d).", err); 1707 goto out; 1708 } 1709 1710 /* Load $Extend. */ 1711 err = ntfs_extend_init(sbi); 1712 if (err) { 1713 ntfs_warn(sb, "Failed to initialize $Extend."); 1714 goto load_root; 1715 } 1716 1717 /* Load $Extend/$Reparse. */ 1718 err = ntfs_reparse_init(sbi); 1719 if (err) { 1720 ntfs_warn(sb, "Failed to initialize $Extend/$Reparse."); 1721 goto load_root; 1722 } 1723 1724 /* Load $Extend/$ObjId. */ 1725 err = ntfs_objid_init(sbi); 1726 if (err) { 1727 ntfs_warn(sb, "Failed to initialize $Extend/$ObjId."); 1728 goto load_root; 1729 } 1730 } 1731 1732 load_root: 1733 /* Load root. */ 1734 ref.low = cpu_to_le32(MFT_REC_ROOT); 1735 ref.seq = cpu_to_le16(MFT_REC_ROOT); 1736 inode = ntfs_iget5(sb, &ref, &NAME_ROOT); 1737 if (IS_ERR(inode)) { 1738 err = PTR_ERR(inode); 1739 ntfs_err(sb, "Failed to load root (%d).", err); 1740 goto out; 1741 } 1742 1743 /* 1744 * Final check. Looks like this case should never occurs. 1745 */ 1746 if (!inode->i_op) { 1747 err = -EINVAL; 1748 ntfs_err(sb, "Failed to load root (%d).", err); 1749 goto put_inode_out; 1750 } 1751 1752 sb->s_root = d_make_root(inode); 1753 if (!sb->s_root) { 1754 err = -ENOMEM; 1755 goto out; 1756 } 1757 1758 if (boot2) { 1759 /* 1760 * Alternative boot is ok but primary is not ok. 1761 * Volume is recognized as NTFS. Update primary boot. 1762 */ 1763 struct buffer_head *bh0 = sb_getblk(sb, 0); 1764 if (bh0) { 1765 wait_on_buffer(bh0); 1766 lock_buffer(bh0); 1767 memcpy(bh0->b_data, boot2, sizeof(*boot2)); 1768 set_buffer_uptodate(bh0); 1769 mark_buffer_dirty(bh0); 1770 unlock_buffer(bh0); 1771 if (!sync_dirty_buffer(bh0)) 1772 ntfs_warn(sb, "primary boot is updated"); 1773 put_bh(bh0); 1774 } 1775 1776 kfree(boot2); 1777 } 1778 1779 ntfs_create_procdir(sb); 1780 1781 return 0; 1782 1783 put_inode_out: 1784 iput(inode); 1785 out: 1786 /* sbi->options == options */ 1787 if (options) { 1788 put_mount_options(sbi->options); 1789 sbi->options = NULL; 1790 } 1791 1792 ntfs3_put_sbi(sbi); 1793 kfree(boot2); 1794 return err; 1795 } 1796 1797 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len) 1798 { 1799 struct ntfs_sb_info *sbi = sb->s_fs_info; 1800 struct block_device *bdev = sb->s_bdev; 1801 sector_t devblock = (u64)lcn * sbi->blocks_per_cluster; 1802 unsigned long blocks = (u64)len * sbi->blocks_per_cluster; 1803 unsigned long cnt = 0; 1804 unsigned long limit = global_zone_page_state(NR_FREE_PAGES) 1805 << (PAGE_SHIFT - sb->s_blocksize_bits); 1806 1807 if (limit >= 0x2000) 1808 limit -= 0x1000; 1809 else if (limit < 32) 1810 limit = 32; 1811 else 1812 limit >>= 1; 1813 1814 while (blocks--) { 1815 clean_bdev_aliases(bdev, devblock++, 1); 1816 if (cnt++ >= limit) { 1817 sync_blockdev(bdev); 1818 cnt = 0; 1819 } 1820 } 1821 } 1822 1823 /* 1824 * ntfs_discard - Issue a discard request (trim for SSD). 1825 */ 1826 int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len) 1827 { 1828 int err; 1829 u64 lbo, bytes, start, end; 1830 struct super_block *sb; 1831 1832 if (sbi->used.next_free_lcn == lcn + len) 1833 sbi->used.next_free_lcn = lcn; 1834 1835 if (sbi->flags & NTFS_FLAGS_NODISCARD) 1836 return -EOPNOTSUPP; 1837 1838 if (!sbi->options->discard) 1839 return -EOPNOTSUPP; 1840 1841 lbo = (u64)lcn << sbi->cluster_bits; 1842 bytes = (u64)len << sbi->cluster_bits; 1843 1844 /* Align up 'start' on discard_granularity. */ 1845 start = (lbo + sbi->discard_granularity - 1) & 1846 sbi->discard_granularity_mask_inv; 1847 /* Align down 'end' on discard_granularity. */ 1848 end = (lbo + bytes) & sbi->discard_granularity_mask_inv; 1849 1850 sb = sbi->sb; 1851 if (start >= end) 1852 return 0; 1853 1854 err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9, 1855 GFP_NOFS); 1856 1857 if (err == -EOPNOTSUPP) 1858 sbi->flags |= NTFS_FLAGS_NODISCARD; 1859 1860 return err; 1861 } 1862 1863 static int ntfs_fs_get_tree(struct fs_context *fc) 1864 { 1865 return get_tree_bdev(fc, ntfs_fill_super); 1866 } 1867 1868 /* 1869 * ntfs_fs_free - Free fs_context. 1870 * 1871 * Note that this will be called after fill_super and reconfigure 1872 * even when they pass. So they have to take pointers if they pass. 1873 */ 1874 static void ntfs_fs_free(struct fs_context *fc) 1875 { 1876 struct ntfs_mount_options *opts = fc->fs_private; 1877 struct ntfs_sb_info *sbi = fc->s_fs_info; 1878 1879 if (sbi) { 1880 ntfs3_put_sbi(sbi); 1881 ntfs3_free_sbi(sbi); 1882 } 1883 1884 if (opts) 1885 put_mount_options(opts); 1886 } 1887 1888 // clang-format off 1889 static const struct fs_context_operations ntfs_context_ops = { 1890 .parse_param = ntfs_fs_parse_param, 1891 .get_tree = ntfs_fs_get_tree, 1892 .reconfigure = ntfs_fs_reconfigure, 1893 .free = ntfs_fs_free, 1894 }; 1895 // clang-format on 1896 1897 /* 1898 * ntfs_init_fs_context - Initialize sbi and opts 1899 * 1900 * This will called when mount/remount. We will first initialize 1901 * options so that if remount we can use just that. 1902 */ 1903 static int ntfs_init_fs_context(struct fs_context *fc) 1904 { 1905 struct ntfs_mount_options *opts; 1906 struct ntfs_sb_info *sbi; 1907 1908 opts = kzalloc_obj(struct ntfs_mount_options, GFP_NOFS); 1909 if (!opts) 1910 return -ENOMEM; 1911 1912 /* Default options. */ 1913 opts->fs_uid = current_uid(); 1914 opts->fs_gid = current_gid(); 1915 opts->fs_fmask_inv = opts->fs_dmask_inv = ~current_umask(); 1916 opts->prealloc = 1; 1917 opts->ads = 1; 1918 1919 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 1920 /* Set the default value 'acl' */ 1921 fc->sb_flags |= SB_POSIXACL; 1922 #endif 1923 1924 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) 1925 goto ok; 1926 1927 sbi = kzalloc_obj(struct ntfs_sb_info, GFP_NOFS); 1928 if (!sbi) 1929 goto free_opts; 1930 1931 sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL); 1932 if (!sbi->upcase) 1933 goto free_sbi; 1934 1935 ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL, 1936 DEFAULT_RATELIMIT_BURST); 1937 1938 mutex_init(&sbi->compress.mtx_lznt); 1939 #ifdef CONFIG_NTFS3_LZX_XPRESS 1940 mutex_init(&sbi->compress.mtx_xpress); 1941 mutex_init(&sbi->compress.mtx_lzx); 1942 #endif 1943 1944 fc->s_fs_info = sbi; 1945 ok: 1946 fc->fs_private = opts; 1947 fc->ops = &ntfs_context_ops; 1948 1949 return 0; 1950 free_sbi: 1951 kfree(sbi); 1952 free_opts: 1953 kfree(opts); 1954 return -ENOMEM; 1955 } 1956 1957 static void ntfs3_kill_sb(struct super_block *sb) 1958 { 1959 struct ntfs_sb_info *sbi = sb->s_fs_info; 1960 1961 kill_block_super(sb); 1962 1963 /* 1964 * A pathwalk in rcu mode may still be in ->d_hash() or ->d_compare() 1965 * and read the upcase table and the nls table through the sbi. 1966 */ 1967 call_rcu(&sbi->rcu, ntfs3_free_sbi_rcu); 1968 } 1969 1970 // clang-format off 1971 static struct file_system_type ntfs_fs_type = { 1972 .owner = THIS_MODULE, 1973 .name = "ntfs3", 1974 .init_fs_context = ntfs_init_fs_context, 1975 .parameters = ntfs_fs_parameters, 1976 .kill_sb = ntfs3_kill_sb, 1977 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 1978 }; 1979 // clang-format on 1980 1981 static int __init init_ntfs_fs(void) 1982 { 1983 int err; 1984 1985 if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL)) 1986 pr_info("ntfs3: Enabled Linux POSIX ACLs support\n"); 1987 if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER)) 1988 pr_notice( 1989 "ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n"); 1990 if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS)) 1991 pr_info("ntfs3: Read-only LZX/Xpress compression included\n"); 1992 1993 ntfs_create_proc_root(); 1994 1995 err = ntfs3_init_bitmap(); 1996 if (err) 1997 goto out2; 1998 1999 ntfs_inode_cachep = kmem_cache_create( 2000 "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, 2001 (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), init_once); 2002 if (!ntfs_inode_cachep) { 2003 err = -ENOMEM; 2004 goto out1; 2005 } 2006 2007 err = register_filesystem(&ntfs_fs_type); 2008 if (err) 2009 goto out; 2010 2011 return 0; 2012 out: 2013 kmem_cache_destroy(ntfs_inode_cachep); 2014 out1: 2015 ntfs3_exit_bitmap(); 2016 out2: 2017 ntfs_remove_proc_root(); 2018 return err; 2019 } 2020 2021 static void __exit exit_ntfs_fs(void) 2022 { 2023 rcu_barrier(); 2024 kmem_cache_destroy(ntfs_inode_cachep); 2025 unregister_filesystem(&ntfs_fs_type); 2026 ntfs3_exit_bitmap(); 2027 ntfs_remove_proc_root(); 2028 } 2029 2030 MODULE_LICENSE("GPL"); 2031 MODULE_DESCRIPTION("ntfs3 read/write filesystem"); 2032 #ifdef CONFIG_NTFS3_FS_POSIX_ACL 2033 MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support"); 2034 #endif 2035 #ifdef CONFIG_NTFS3_64BIT_CLUSTER 2036 MODULE_INFO( 2037 cluster, 2038 "Warning: Activated 64 bits per cluster. Windows does not support this"); 2039 #endif 2040 #ifdef CONFIG_NTFS3_LZX_XPRESS 2041 MODULE_INFO(compression, "Read-only lzx/xpress compression included"); 2042 #endif 2043 2044 MODULE_AUTHOR("Konstantin Komarov"); 2045 MODULE_ALIAS_FS("ntfs3"); 2046 2047 module_init(init_ntfs_fs); 2048 module_exit(exit_ntfs_fs); 2049