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26#include <linux/blkdev.h>
27#include <linux/buffer_head.h>
28#include <linux/exportfs.h>
29#include <linux/fs.h>
30#include <linux/fs_context.h>
31#include <linux/fs_parser.h>
32#include <linux/log2.h>
33#include <linux/module.h>
34#include <linux/nls.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
48
49
50
51void ntfs_printk(const struct super_block *sb, const char *fmt, ...)
52{
53 struct va_format vaf;
54 va_list args;
55 int level;
56 struct ntfs_sb_info *sbi = sb->s_fs_info;
57
58
59 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
60 return;
61
62 va_start(args, fmt);
63
64 level = printk_get_level(fmt);
65 vaf.fmt = printk_skip_level(fmt);
66 vaf.va = &args;
67 printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf);
68
69 va_end(args);
70}
71
72static char s_name_buf[512];
73static atomic_t s_name_buf_cnt = ATOMIC_INIT(1);
74
75
76
77
78
79
80void ntfs_inode_printk(struct inode *inode, const char *fmt, ...)
81{
82 struct super_block *sb = inode->i_sb;
83 struct ntfs_sb_info *sbi = sb->s_fs_info;
84 char *name;
85 va_list args;
86 struct va_format vaf;
87 int level;
88
89 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
90 return;
91
92
93 name = atomic_dec_and_test(&s_name_buf_cnt)
94 ? s_name_buf
95 : kmalloc(sizeof(s_name_buf), GFP_NOFS);
96
97 if (name) {
98 struct dentry *de = d_find_alias(inode);
99 const u32 name_len = ARRAY_SIZE(s_name_buf) - 1;
100
101 if (de) {
102 spin_lock(&de->d_lock);
103 snprintf(name, name_len, " \"%s\"", de->d_name.name);
104 spin_unlock(&de->d_lock);
105 name[name_len] = 0;
106 } else {
107 name[0] = 0;
108 }
109 dput(de);
110 }
111
112 va_start(args, fmt);
113
114 level = printk_get_level(fmt);
115 vaf.fmt = printk_skip_level(fmt);
116 vaf.va = &args;
117
118 printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level,
119 sb->s_id, inode->i_ino, name ? name : "", &vaf);
120
121 va_end(args);
122
123 atomic_inc(&s_name_buf_cnt);
124 if (name != s_name_buf)
125 kfree(name);
126}
127#endif
128
129
130
131
132
133
134
135
136
137
138
139static DEFINE_SPINLOCK(s_shared_lock);
140
141static struct {
142 void *ptr;
143 u32 len;
144 int cnt;
145} s_shared[8];
146
147
148
149
150
151
152
153
154void *ntfs_set_shared(void *ptr, u32 bytes)
155{
156 void *ret = NULL;
157 int i, j = -1;
158
159 spin_lock(&s_shared_lock);
160 for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
161 if (!s_shared[i].cnt) {
162 j = i;
163 } else if (bytes == s_shared[i].len &&
164 !memcmp(s_shared[i].ptr, ptr, bytes)) {
165 s_shared[i].cnt += 1;
166 ret = s_shared[i].ptr;
167 break;
168 }
169 }
170
171 if (!ret && j != -1) {
172 s_shared[j].ptr = ptr;
173 s_shared[j].len = bytes;
174 s_shared[j].cnt = 1;
175 ret = ptr;
176 }
177 spin_unlock(&s_shared_lock);
178
179 return ret;
180}
181
182
183
184
185
186
187
188
189void *ntfs_put_shared(void *ptr)
190{
191 void *ret = ptr;
192 int i;
193
194 spin_lock(&s_shared_lock);
195 for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
196 if (s_shared[i].cnt && s_shared[i].ptr == ptr) {
197 if (--s_shared[i].cnt)
198 ret = NULL;
199 break;
200 }
201 }
202 spin_unlock(&s_shared_lock);
203
204 return ret;
205}
206
207static inline void put_mount_options(struct ntfs_mount_options *options)
208{
209 kfree(options->nls_name);
210 unload_nls(options->nls);
211 kfree(options);
212}
213
214enum Opt {
215 Opt_uid,
216 Opt_gid,
217 Opt_umask,
218 Opt_dmask,
219 Opt_fmask,
220 Opt_immutable,
221 Opt_discard,
222 Opt_force,
223 Opt_sparse,
224 Opt_nohidden,
225 Opt_showmeta,
226 Opt_acl,
227 Opt_iocharset,
228 Opt_prealloc,
229 Opt_noacsrules,
230 Opt_err,
231};
232
233static const struct fs_parameter_spec ntfs_fs_parameters[] = {
234 fsparam_u32("uid", Opt_uid),
235 fsparam_u32("gid", Opt_gid),
236 fsparam_u32oct("umask", Opt_umask),
237 fsparam_u32oct("dmask", Opt_dmask),
238 fsparam_u32oct("fmask", Opt_fmask),
239 fsparam_flag_no("sys_immutable", Opt_immutable),
240 fsparam_flag_no("discard", Opt_discard),
241 fsparam_flag_no("force", Opt_force),
242 fsparam_flag_no("sparse", Opt_sparse),
243 fsparam_flag_no("hidden", Opt_nohidden),
244 fsparam_flag_no("acl", Opt_acl),
245 fsparam_flag_no("showmeta", Opt_showmeta),
246 fsparam_flag_no("prealloc", Opt_prealloc),
247 fsparam_flag_no("acsrules", Opt_noacsrules),
248 fsparam_string("iocharset", Opt_iocharset),
249 {}
250};
251
252
253
254
255static struct nls_table *ntfs_load_nls(char *nls)
256{
257 struct nls_table *ret;
258
259 if (!nls)
260 nls = CONFIG_NLS_DEFAULT;
261
262 if (strcmp(nls, "utf8") == 0)
263 return NULL;
264
265 if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0)
266 return load_nls_default();
267
268 ret = load_nls(nls);
269 if (ret)
270 return ret;
271
272 return ERR_PTR(-EINVAL);
273}
274
275static int ntfs_fs_parse_param(struct fs_context *fc,
276 struct fs_parameter *param)
277{
278 struct ntfs_mount_options *opts = fc->fs_private;
279 struct fs_parse_result result;
280 int opt;
281
282 opt = fs_parse(fc, ntfs_fs_parameters, param, &result);
283 if (opt < 0)
284 return opt;
285
286 switch (opt) {
287 case Opt_uid:
288 opts->fs_uid = make_kuid(current_user_ns(), result.uint_32);
289 if (!uid_valid(opts->fs_uid))
290 return invalf(fc, "ntfs3: Invalid value for uid.");
291 break;
292 case Opt_gid:
293 opts->fs_gid = make_kgid(current_user_ns(), result.uint_32);
294 if (!gid_valid(opts->fs_gid))
295 return invalf(fc, "ntfs3: Invalid value for gid.");
296 break;
297 case Opt_umask:
298 if (result.uint_32 & ~07777)
299 return invalf(fc, "ntfs3: Invalid value for umask.");
300 opts->fs_fmask_inv = ~result.uint_32;
301 opts->fs_dmask_inv = ~result.uint_32;
302 opts->fmask = 1;
303 opts->dmask = 1;
304 break;
305 case Opt_dmask:
306 if (result.uint_32 & ~07777)
307 return invalf(fc, "ntfs3: Invalid value for dmask.");
308 opts->fs_dmask_inv = ~result.uint_32;
309 opts->dmask = 1;
310 break;
311 case Opt_fmask:
312 if (result.uint_32 & ~07777)
313 return invalf(fc, "ntfs3: Invalid value for fmask.");
314 opts->fs_fmask_inv = ~result.uint_32;
315 opts->fmask = 1;
316 break;
317 case Opt_immutable:
318 opts->sys_immutable = result.negated ? 0 : 1;
319 break;
320 case Opt_discard:
321 opts->discard = result.negated ? 0 : 1;
322 break;
323 case Opt_force:
324 opts->force = result.negated ? 0 : 1;
325 break;
326 case Opt_sparse:
327 opts->sparse = result.negated ? 0 : 1;
328 break;
329 case Opt_nohidden:
330 opts->nohidden = result.negated ? 1 : 0;
331 break;
332 case Opt_acl:
333 if (!result.negated)
334#ifdef CONFIG_NTFS3_FS_POSIX_ACL
335 fc->sb_flags |= SB_POSIXACL;
336#else
337 return invalf(fc, "ntfs3: Support for ACL not compiled in!");
338#endif
339 else
340 fc->sb_flags &= ~SB_POSIXACL;
341 break;
342 case Opt_showmeta:
343 opts->showmeta = result.negated ? 0 : 1;
344 break;
345 case Opt_iocharset:
346 kfree(opts->nls_name);
347 opts->nls_name = param->string;
348 param->string = NULL;
349 break;
350 case Opt_prealloc:
351 opts->prealloc = result.negated ? 0 : 1;
352 break;
353 case Opt_noacsrules:
354 opts->noacsrules = result.negated ? 1 : 0;
355 break;
356 default:
357
358 return -EINVAL;
359 }
360 return 0;
361}
362
363static int ntfs_fs_reconfigure(struct fs_context *fc)
364{
365 struct super_block *sb = fc->root->d_sb;
366 struct ntfs_sb_info *sbi = sb->s_fs_info;
367 struct ntfs_mount_options *new_opts = fc->fs_private;
368 int ro_rw;
369
370 ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY);
371 if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) {
372 errorf(fc, "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n");
373 return -EINVAL;
374 }
375
376 new_opts->nls = ntfs_load_nls(new_opts->nls_name);
377 if (IS_ERR(new_opts->nls)) {
378 new_opts->nls = NULL;
379 errorf(fc, "ntfs3: Cannot load iocharset %s", new_opts->nls_name);
380 return -EINVAL;
381 }
382 if (new_opts->nls != sbi->options->nls)
383 return invalf(fc, "ntfs3: Cannot use different iocharset when remounting!");
384
385 sync_filesystem(sb);
386
387 if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) &&
388 !new_opts->force) {
389 errorf(fc, "ntfs3: Volume is dirty and \"force\" flag is not set!");
390 return -EINVAL;
391 }
392
393 memcpy(sbi->options, new_opts, sizeof(*new_opts));
394
395 return 0;
396}
397
398static struct kmem_cache *ntfs_inode_cachep;
399
400static struct inode *ntfs_alloc_inode(struct super_block *sb)
401{
402 struct ntfs_inode *ni = kmem_cache_alloc(ntfs_inode_cachep, GFP_NOFS);
403
404 if (!ni)
405 return NULL;
406
407 memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode));
408
409 mutex_init(&ni->ni_lock);
410
411 return &ni->vfs_inode;
412}
413
414static void ntfs_i_callback(struct rcu_head *head)
415{
416 struct inode *inode = container_of(head, struct inode, i_rcu);
417 struct ntfs_inode *ni = ntfs_i(inode);
418
419 mutex_destroy(&ni->ni_lock);
420
421 kmem_cache_free(ntfs_inode_cachep, ni);
422}
423
424static void ntfs_destroy_inode(struct inode *inode)
425{
426 call_rcu(&inode->i_rcu, ntfs_i_callback);
427}
428
429static void init_once(void *foo)
430{
431 struct ntfs_inode *ni = foo;
432
433 inode_init_once(&ni->vfs_inode);
434}
435
436
437
438
439static noinline void put_ntfs(struct ntfs_sb_info *sbi)
440{
441 kfree(sbi->new_rec);
442 kvfree(ntfs_put_shared(sbi->upcase));
443 kfree(sbi->def_table);
444
445 wnd_close(&sbi->mft.bitmap);
446 wnd_close(&sbi->used.bitmap);
447
448 if (sbi->mft.ni)
449 iput(&sbi->mft.ni->vfs_inode);
450
451 if (sbi->security.ni)
452 iput(&sbi->security.ni->vfs_inode);
453
454 if (sbi->reparse.ni)
455 iput(&sbi->reparse.ni->vfs_inode);
456
457 if (sbi->objid.ni)
458 iput(&sbi->objid.ni->vfs_inode);
459
460 if (sbi->volume.ni)
461 iput(&sbi->volume.ni->vfs_inode);
462
463 ntfs_update_mftmirr(sbi, 0);
464
465 indx_clear(&sbi->security.index_sii);
466 indx_clear(&sbi->security.index_sdh);
467 indx_clear(&sbi->reparse.index_r);
468 indx_clear(&sbi->objid.index_o);
469 kfree(sbi->compress.lznt);
470#ifdef CONFIG_NTFS3_LZX_XPRESS
471 xpress_free_decompressor(sbi->compress.xpress);
472 lzx_free_decompressor(sbi->compress.lzx);
473#endif
474 kfree(sbi);
475}
476
477static void ntfs_put_super(struct super_block *sb)
478{
479 struct ntfs_sb_info *sbi = sb->s_fs_info;
480
481
482 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
483
484 put_mount_options(sbi->options);
485 put_ntfs(sbi);
486 sb->s_fs_info = NULL;
487
488 sync_blockdev(sb->s_bdev);
489}
490
491static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf)
492{
493 struct super_block *sb = dentry->d_sb;
494 struct ntfs_sb_info *sbi = sb->s_fs_info;
495 struct wnd_bitmap *wnd = &sbi->used.bitmap;
496
497 buf->f_type = sb->s_magic;
498 buf->f_bsize = sbi->cluster_size;
499 buf->f_blocks = wnd->nbits;
500
501 buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd);
502 buf->f_fsid.val[0] = sbi->volume.ser_num;
503 buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32);
504 buf->f_namelen = NTFS_NAME_LEN;
505
506 return 0;
507}
508
509static int ntfs_show_options(struct seq_file *m, struct dentry *root)
510{
511 struct super_block *sb = root->d_sb;
512 struct ntfs_sb_info *sbi = sb->s_fs_info;
513 struct ntfs_mount_options *opts = sbi->options;
514 struct user_namespace *user_ns = seq_user_ns(m);
515
516 seq_printf(m, ",uid=%u",
517 from_kuid_munged(user_ns, opts->fs_uid));
518 seq_printf(m, ",gid=%u",
519 from_kgid_munged(user_ns, opts->fs_gid));
520 if (opts->fmask)
521 seq_printf(m, ",fmask=%04o", ~opts->fs_fmask_inv);
522 if (opts->dmask)
523 seq_printf(m, ",dmask=%04o", ~opts->fs_dmask_inv);
524 if (opts->nls)
525 seq_printf(m, ",iocharset=%s", opts->nls->charset);
526 else
527 seq_puts(m, ",iocharset=utf8");
528 if (opts->sys_immutable)
529 seq_puts(m, ",sys_immutable");
530 if (opts->discard)
531 seq_puts(m, ",discard");
532 if (opts->sparse)
533 seq_puts(m, ",sparse");
534 if (opts->showmeta)
535 seq_puts(m, ",showmeta");
536 if (opts->nohidden)
537 seq_puts(m, ",nohidden");
538 if (opts->force)
539 seq_puts(m, ",force");
540 if (opts->noacsrules)
541 seq_puts(m, ",noacsrules");
542 if (opts->prealloc)
543 seq_puts(m, ",prealloc");
544 if (sb->s_flags & SB_POSIXACL)
545 seq_puts(m, ",acl");
546
547 return 0;
548}
549
550
551
552
553static int ntfs_sync_fs(struct super_block *sb, int wait)
554{
555 int err = 0, err2;
556 struct ntfs_sb_info *sbi = sb->s_fs_info;
557 struct ntfs_inode *ni;
558 struct inode *inode;
559
560 ni = sbi->security.ni;
561 if (ni) {
562 inode = &ni->vfs_inode;
563 err2 = _ni_write_inode(inode, wait);
564 if (err2 && !err)
565 err = err2;
566 }
567
568 ni = sbi->objid.ni;
569 if (ni) {
570 inode = &ni->vfs_inode;
571 err2 = _ni_write_inode(inode, wait);
572 if (err2 && !err)
573 err = err2;
574 }
575
576 ni = sbi->reparse.ni;
577 if (ni) {
578 inode = &ni->vfs_inode;
579 err2 = _ni_write_inode(inode, wait);
580 if (err2 && !err)
581 err = err2;
582 }
583
584 if (!err)
585 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
586
587 ntfs_update_mftmirr(sbi, wait);
588
589 return err;
590}
591
592static const struct super_operations ntfs_sops = {
593 .alloc_inode = ntfs_alloc_inode,
594 .destroy_inode = ntfs_destroy_inode,
595 .evict_inode = ntfs_evict_inode,
596 .put_super = ntfs_put_super,
597 .statfs = ntfs_statfs,
598 .show_options = ntfs_show_options,
599 .sync_fs = ntfs_sync_fs,
600 .write_inode = ntfs3_write_inode,
601};
602
603static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino,
604 u32 generation)
605{
606 struct MFT_REF ref;
607 struct inode *inode;
608
609 ref.low = cpu_to_le32(ino);
610#ifdef CONFIG_NTFS3_64BIT_CLUSTER
611 ref.high = cpu_to_le16(ino >> 32);
612#else
613 ref.high = 0;
614#endif
615 ref.seq = cpu_to_le16(generation);
616
617 inode = ntfs_iget5(sb, &ref, NULL);
618 if (!IS_ERR(inode) && is_bad_inode(inode)) {
619 iput(inode);
620 inode = ERR_PTR(-ESTALE);
621 }
622
623 return inode;
624}
625
626static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
627 int fh_len, int fh_type)
628{
629 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
630 ntfs_export_get_inode);
631}
632
633static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid,
634 int fh_len, int fh_type)
635{
636 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
637 ntfs_export_get_inode);
638}
639
640
641static int ntfs_nfs_commit_metadata(struct inode *inode)
642{
643 return _ni_write_inode(inode, 1);
644}
645
646static const struct export_operations ntfs_export_ops = {
647 .fh_to_dentry = ntfs_fh_to_dentry,
648 .fh_to_parent = ntfs_fh_to_parent,
649 .get_parent = ntfs3_get_parent,
650 .commit_metadata = ntfs_nfs_commit_metadata,
651};
652
653
654
655
656static u32 format_size_gb(const u64 bytes, u32 *mb)
657{
658
659 u64 kbytes = bytes >> 10;
660 u32 kbytes32 = kbytes;
661
662 *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20;
663 if (*mb >= 100)
664 *mb = 99;
665
666 return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12);
667}
668
669static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot)
670{
671 return boot->sectors_per_clusters <= 0x80
672 ? boot->sectors_per_clusters
673 : (1u << (0 - boot->sectors_per_clusters));
674}
675
676
677
678
679static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
680 u64 dev_size)
681{
682 struct ntfs_sb_info *sbi = sb->s_fs_info;
683 int err;
684 u32 mb, gb, boot_sector_size, sct_per_clst, record_size;
685 u64 sectors, clusters, mlcn, mlcn2;
686 struct NTFS_BOOT *boot;
687 struct buffer_head *bh;
688 struct MFT_REC *rec;
689 u16 fn, ao;
690
691 sbi->volume.blocks = dev_size >> PAGE_SHIFT;
692
693 bh = ntfs_bread(sb, 0);
694 if (!bh)
695 return -EIO;
696
697 err = -EINVAL;
698 boot = (struct NTFS_BOOT *)bh->b_data;
699
700 if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1))
701 goto out;
702
703
704
705
706
707
708 boot_sector_size = (u32)boot->bytes_per_sector[1] << 8;
709 if (boot->bytes_per_sector[0] || boot_sector_size < SECTOR_SIZE ||
710 !is_power_of_2(boot_sector_size)) {
711 goto out;
712 }
713
714
715 sct_per_clst = true_sectors_per_clst(boot);
716 if (!is_power_of_2(sct_per_clst))
717 goto out;
718
719 mlcn = le64_to_cpu(boot->mft_clst);
720 mlcn2 = le64_to_cpu(boot->mft2_clst);
721 sectors = le64_to_cpu(boot->sectors_per_volume);
722
723 if (mlcn * sct_per_clst >= sectors)
724 goto out;
725
726 if (mlcn2 * sct_per_clst >= sectors)
727 goto out;
728
729
730 if ((boot->record_size < 0 &&
731 SECTOR_SIZE > (2U << (-boot->record_size))) ||
732 (boot->record_size >= 0 && !is_power_of_2(boot->record_size))) {
733 goto out;
734 }
735
736
737 if ((boot->index_size < 0 &&
738 SECTOR_SIZE > (2U << (-boot->index_size))) ||
739 (boot->index_size >= 0 && !is_power_of_2(boot->index_size))) {
740 goto out;
741 }
742
743 sbi->volume.size = sectors * boot_sector_size;
744
745 gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb);
746
747
748
749
750
751
752 if (boot_sector_size != sector_size) {
753 ntfs_warn(
754 sb,
755 "Different NTFS' sector size (%u) and media sector size (%u)",
756 boot_sector_size, sector_size);
757 dev_size += sector_size - 1;
758 }
759
760 sbi->cluster_size = boot_sector_size * sct_per_clst;
761 sbi->cluster_bits = blksize_bits(sbi->cluster_size);
762
763 sbi->mft.lbo = mlcn << sbi->cluster_bits;
764 sbi->mft.lbo2 = mlcn2 << sbi->cluster_bits;
765
766
767 if (sbi->cluster_size < boot_sector_size)
768 goto out;
769
770
771 if (sbi->cluster_size < sector_size) {
772
773 ntfs_err(
774 sb,
775 "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u)",
776 sbi->cluster_size, sector_size);
777 goto out;
778 }
779
780 sbi->cluster_mask = sbi->cluster_size - 1;
781 sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask;
782 sbi->record_size = record_size = boot->record_size < 0
783 ? 1 << (-boot->record_size)
784 : (u32)boot->record_size
785 << sbi->cluster_bits;
786
787 if (record_size > MAXIMUM_BYTES_PER_MFT)
788 goto out;
789
790 sbi->record_bits = blksize_bits(record_size);
791 sbi->attr_size_tr = (5 * record_size >> 4);
792
793 sbi->max_bytes_per_attr =
794 record_size - ALIGN(MFTRECORD_FIXUP_OFFSET_1, 8) -
795 ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) -
796 ALIGN(sizeof(enum ATTR_TYPE), 8);
797
798 sbi->index_size = boot->index_size < 0
799 ? 1u << (-boot->index_size)
800 : (u32)boot->index_size << sbi->cluster_bits;
801
802 sbi->volume.ser_num = le64_to_cpu(boot->serial_num);
803
804
805 if (dev_size < sbi->volume.size + boot_sector_size) {
806 u32 mb0, gb0;
807
808 gb0 = format_size_gb(dev_size, &mb0);
809 ntfs_warn(
810 sb,
811 "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only",
812 gb, mb, gb0, mb0);
813 sb->s_flags |= SB_RDONLY;
814 }
815
816 clusters = sbi->volume.size >> sbi->cluster_bits;
817#ifndef CONFIG_NTFS3_64BIT_CLUSTER
818
819 if (clusters >> 32) {
820 ntfs_notice(
821 sb,
822 "NTFS %u.%02u Gb is too big to use 32 bits per cluster",
823 gb, mb);
824 goto out;
825 }
826#elif BITS_PER_LONG < 64
827#error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS"
828#endif
829
830 sbi->used.bitmap.nbits = clusters;
831
832 rec = kzalloc(record_size, GFP_NOFS);
833 if (!rec) {
834 err = -ENOMEM;
835 goto out;
836 }
837
838 sbi->new_rec = rec;
839 rec->rhdr.sign = NTFS_FILE_SIGNATURE;
840 rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET_1);
841 fn = (sbi->record_size >> SECTOR_SHIFT) + 1;
842 rec->rhdr.fix_num = cpu_to_le16(fn);
843 ao = ALIGN(MFTRECORD_FIXUP_OFFSET_1 + sizeof(short) * fn, 8);
844 rec->attr_off = cpu_to_le16(ao);
845 rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8));
846 rec->total = cpu_to_le32(sbi->record_size);
847 ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END;
848
849 sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE));
850
851 sbi->block_mask = sb->s_blocksize - 1;
852 sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits;
853 sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits;
854
855
856 sbi->maxbytes = (clusters << sbi->cluster_bits) - 1;
857
858#ifdef CONFIG_NTFS3_64BIT_CLUSTER
859 if (clusters >= (1ull << (64 - sbi->cluster_bits)))
860 sbi->maxbytes = -1;
861 sbi->maxbytes_sparse = -1;
862 sb->s_maxbytes = MAX_LFS_FILESIZE;
863#else
864
865 sbi->maxbytes_sparse = (1ull << (sbi->cluster_bits + 32)) - 1;
866 sb->s_maxbytes = 0xFFFFFFFFull << sbi->cluster_bits;
867#endif
868
869 err = 0;
870
871out:
872 brelse(bh);
873
874 return err;
875}
876
877
878
879
880static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
881{
882 int err;
883 struct ntfs_sb_info *sbi = sb->s_fs_info;
884 struct block_device *bdev = sb->s_bdev;
885 struct request_queue *rq;
886 struct inode *inode;
887 struct ntfs_inode *ni;
888 size_t i, tt;
889 CLST vcn, lcn, len;
890 struct ATTRIB *attr;
891 const struct VOLUME_INFO *info;
892 u32 idx, done, bytes;
893 struct ATTR_DEF_ENTRY *t;
894 u16 *shared;
895 struct MFT_REF ref;
896
897 ref.high = 0;
898
899 sbi->sb = sb;
900 sb->s_flags |= SB_NODIRATIME;
901 sb->s_magic = 0x7366746e;
902 sb->s_op = &ntfs_sops;
903 sb->s_export_op = &ntfs_export_ops;
904 sb->s_time_gran = NTFS_TIME_GRAN;
905 sb->s_xattr = ntfs_xattr_handlers;
906
907 sbi->options->nls = ntfs_load_nls(sbi->options->nls_name);
908 if (IS_ERR(sbi->options->nls)) {
909 sbi->options->nls = NULL;
910 errorf(fc, "Cannot load nls %s", sbi->options->nls_name);
911 err = -EINVAL;
912 goto out;
913 }
914
915 rq = bdev_get_queue(bdev);
916 if (blk_queue_discard(rq) && rq->limits.discard_granularity) {
917 sbi->discard_granularity = rq->limits.discard_granularity;
918 sbi->discard_granularity_mask_inv =
919 ~(u64)(sbi->discard_granularity - 1);
920 }
921
922
923 err = ntfs_init_from_boot(sb, rq ? queue_logical_block_size(rq) : 512,
924 bdev->bd_inode->i_size);
925 if (err)
926 goto out;
927
928
929
930
931
932 ref.low = cpu_to_le32(MFT_REC_VOL);
933 ref.seq = cpu_to_le16(MFT_REC_VOL);
934 inode = ntfs_iget5(sb, &ref, &NAME_VOLUME);
935 if (IS_ERR(inode)) {
936 ntfs_err(sb, "Failed to load $Volume.");
937 err = PTR_ERR(inode);
938 goto out;
939 }
940
941 ni = ntfs_i(inode);
942
943
944 attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL);
945
946 if (!attr) {
947
948 } else if (!attr->non_res && !is_attr_ext(attr)) {
949
950 err = utf16s_to_utf8s(resident_data(attr),
951 le32_to_cpu(attr->res.data_size) >> 1,
952 UTF16_LITTLE_ENDIAN, sbi->volume.label,
953 sizeof(sbi->volume.label));
954 if (err < 0)
955 sbi->volume.label[0] = 0;
956 } else {
957
958
959
960 }
961
962 attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL);
963 if (!attr || is_attr_ext(attr)) {
964 err = -EINVAL;
965 goto put_inode_out;
966 }
967
968 info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO);
969 if (!info) {
970 err = -EINVAL;
971 goto put_inode_out;
972 }
973
974 sbi->volume.major_ver = info->major_ver;
975 sbi->volume.minor_ver = info->minor_ver;
976 sbi->volume.flags = info->flags;
977 sbi->volume.ni = ni;
978
979
980 ref.low = cpu_to_le32(MFT_REC_MIRR);
981 ref.seq = cpu_to_le16(MFT_REC_MIRR);
982 inode = ntfs_iget5(sb, &ref, &NAME_MIRROR);
983 if (IS_ERR(inode)) {
984 ntfs_err(sb, "Failed to load $MFTMirr.");
985 err = PTR_ERR(inode);
986 goto out;
987 }
988
989 sbi->mft.recs_mirr =
990 ntfs_up_cluster(sbi, inode->i_size) >> sbi->record_bits;
991
992 iput(inode);
993
994
995 ref.low = cpu_to_le32(MFT_REC_LOG);
996 ref.seq = cpu_to_le16(MFT_REC_LOG);
997 inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE);
998 if (IS_ERR(inode)) {
999 ntfs_err(sb, "Failed to load \x24LogFile.");
1000 err = PTR_ERR(inode);
1001 goto out;
1002 }
1003
1004 ni = ntfs_i(inode);
1005
1006 err = ntfs_loadlog_and_replay(ni, sbi);
1007 if (err)
1008 goto put_inode_out;
1009
1010 iput(inode);
1011
1012 if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) {
1013 if (!sb_rdonly(sb)) {
1014 ntfs_warn(sb,
1015 "failed to replay log file. Can't mount rw!");
1016 err = -EINVAL;
1017 goto out;
1018 }
1019 } else if (sbi->volume.flags & VOLUME_FLAG_DIRTY) {
1020 if (!sb_rdonly(sb) && !sbi->options->force) {
1021 ntfs_warn(
1022 sb,
1023 "volume is dirty and \"force\" flag is not set!");
1024 err = -EINVAL;
1025 goto out;
1026 }
1027 }
1028
1029
1030 ref.low = cpu_to_le32(MFT_REC_MFT);
1031 ref.seq = cpu_to_le16(1);
1032
1033 inode = ntfs_iget5(sb, &ref, &NAME_MFT);
1034 if (IS_ERR(inode)) {
1035 ntfs_err(sb, "Failed to load $MFT.");
1036 err = PTR_ERR(inode);
1037 goto out;
1038 }
1039
1040 ni = ntfs_i(inode);
1041
1042 sbi->mft.used = ni->i_valid >> sbi->record_bits;
1043 tt = inode->i_size >> sbi->record_bits;
1044 sbi->mft.next_free = MFT_REC_USER;
1045
1046 err = wnd_init(&sbi->mft.bitmap, sb, tt);
1047 if (err)
1048 goto put_inode_out;
1049
1050 err = ni_load_all_mi(ni);
1051 if (err)
1052 goto put_inode_out;
1053
1054 sbi->mft.ni = ni;
1055
1056
1057 ref.low = cpu_to_le32(MFT_REC_BADCLUST);
1058 ref.seq = cpu_to_le16(MFT_REC_BADCLUST);
1059 inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS);
1060 if (IS_ERR(inode)) {
1061 ntfs_err(sb, "Failed to load $BadClus.");
1062 err = PTR_ERR(inode);
1063 goto out;
1064 }
1065
1066 ni = ntfs_i(inode);
1067
1068 for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) {
1069 if (lcn == SPARSE_LCN)
1070 continue;
1071
1072 if (!sbi->bad_clusters)
1073 ntfs_notice(sb, "Volume contains bad blocks");
1074
1075 sbi->bad_clusters += len;
1076 }
1077
1078 iput(inode);
1079
1080
1081 ref.low = cpu_to_le32(MFT_REC_BITMAP);
1082 ref.seq = cpu_to_le16(MFT_REC_BITMAP);
1083 inode = ntfs_iget5(sb, &ref, &NAME_BITMAP);
1084 if (IS_ERR(inode)) {
1085 ntfs_err(sb, "Failed to load $Bitmap.");
1086 err = PTR_ERR(inode);
1087 goto out;
1088 }
1089
1090#ifndef CONFIG_NTFS3_64BIT_CLUSTER
1091 if (inode->i_size >> 32) {
1092 err = -EINVAL;
1093 goto put_inode_out;
1094 }
1095#endif
1096
1097
1098 tt = sbi->used.bitmap.nbits;
1099 if (inode->i_size < bitmap_size(tt)) {
1100 err = -EINVAL;
1101 goto put_inode_out;
1102 }
1103
1104
1105 sbi->used.bitmap.set_tail = true;
1106 err = wnd_init(&sbi->used.bitmap, sb, tt);
1107 if (err)
1108 goto put_inode_out;
1109
1110 iput(inode);
1111
1112
1113 err = ntfs_refresh_zone(sbi);
1114 if (err)
1115 goto out;
1116
1117
1118 ref.low = cpu_to_le32(MFT_REC_ATTR);
1119 ref.seq = cpu_to_le16(MFT_REC_ATTR);
1120 inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF);
1121 if (IS_ERR(inode)) {
1122 ntfs_err(sb, "Failed to load $AttrDef -> %d", err);
1123 err = PTR_ERR(inode);
1124 goto out;
1125 }
1126
1127 if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY)) {
1128 err = -EINVAL;
1129 goto put_inode_out;
1130 }
1131 bytes = inode->i_size;
1132 sbi->def_table = t = kmalloc(bytes, GFP_NOFS);
1133 if (!t) {
1134 err = -ENOMEM;
1135 goto put_inode_out;
1136 }
1137
1138 for (done = idx = 0; done < bytes; done += PAGE_SIZE, idx++) {
1139 unsigned long tail = bytes - done;
1140 struct page *page = ntfs_map_page(inode->i_mapping, idx);
1141
1142 if (IS_ERR(page)) {
1143 err = PTR_ERR(page);
1144 goto put_inode_out;
1145 }
1146 memcpy(Add2Ptr(t, done), page_address(page),
1147 min(PAGE_SIZE, tail));
1148 ntfs_unmap_page(page);
1149
1150 if (!idx && ATTR_STD != t->type) {
1151 err = -EINVAL;
1152 goto put_inode_out;
1153 }
1154 }
1155
1156 t += 1;
1157 sbi->def_entries = 1;
1158 done = sizeof(struct ATTR_DEF_ENTRY);
1159 sbi->reparse.max_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE;
1160 sbi->ea_max_size = 0x10000;
1161
1162 while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) {
1163 u32 t32 = le32_to_cpu(t->type);
1164 u64 sz = le64_to_cpu(t->max_sz);
1165
1166 if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32)
1167 break;
1168
1169 if (t->type == ATTR_REPARSE)
1170 sbi->reparse.max_size = sz;
1171 else if (t->type == ATTR_EA)
1172 sbi->ea_max_size = sz;
1173
1174 done += sizeof(struct ATTR_DEF_ENTRY);
1175 t += 1;
1176 sbi->def_entries += 1;
1177 }
1178 iput(inode);
1179
1180
1181 ref.low = cpu_to_le32(MFT_REC_UPCASE);
1182 ref.seq = cpu_to_le16(MFT_REC_UPCASE);
1183 inode = ntfs_iget5(sb, &ref, &NAME_UPCASE);
1184 if (IS_ERR(inode)) {
1185 ntfs_err(sb, "Failed to load $UpCase.");
1186 err = PTR_ERR(inode);
1187 goto out;
1188 }
1189
1190 if (inode->i_size != 0x10000 * sizeof(short)) {
1191 err = -EINVAL;
1192 goto put_inode_out;
1193 }
1194
1195 for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) {
1196 const __le16 *src;
1197 u16 *dst = Add2Ptr(sbi->upcase, idx << PAGE_SHIFT);
1198 struct page *page = ntfs_map_page(inode->i_mapping, idx);
1199
1200 if (IS_ERR(page)) {
1201 err = PTR_ERR(page);
1202 goto put_inode_out;
1203 }
1204
1205 src = page_address(page);
1206
1207#ifdef __BIG_ENDIAN
1208 for (i = 0; i < PAGE_SIZE / sizeof(u16); i++)
1209 *dst++ = le16_to_cpu(*src++);
1210#else
1211 memcpy(dst, src, PAGE_SIZE);
1212#endif
1213 ntfs_unmap_page(page);
1214 }
1215
1216 shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short));
1217 if (shared && sbi->upcase != shared) {
1218 kvfree(sbi->upcase);
1219 sbi->upcase = shared;
1220 }
1221
1222 iput(inode);
1223
1224 if (is_ntfs3(sbi)) {
1225
1226 err = ntfs_security_init(sbi);
1227 if (err)
1228 goto out;
1229
1230
1231 err = ntfs_extend_init(sbi);
1232 if (err)
1233 goto load_root;
1234
1235
1236 err = ntfs_reparse_init(sbi);
1237 if (err)
1238 goto load_root;
1239
1240
1241 err = ntfs_objid_init(sbi);
1242 if (err)
1243 goto load_root;
1244 }
1245
1246load_root:
1247
1248 ref.low = cpu_to_le32(MFT_REC_ROOT);
1249 ref.seq = cpu_to_le16(MFT_REC_ROOT);
1250 inode = ntfs_iget5(sb, &ref, &NAME_ROOT);
1251 if (IS_ERR(inode)) {
1252 ntfs_err(sb, "Failed to load root.");
1253 err = PTR_ERR(inode);
1254 goto out;
1255 }
1256
1257 sb->s_root = d_make_root(inode);
1258 if (!sb->s_root) {
1259 err = -ENOMEM;
1260 goto put_inode_out;
1261 }
1262
1263 fc->fs_private = NULL;
1264
1265 return 0;
1266
1267put_inode_out:
1268 iput(inode);
1269out:
1270
1271
1272
1273
1274 put_ntfs(sbi);
1275 sb->s_fs_info = NULL;
1276
1277 return err;
1278}
1279
1280void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len)
1281{
1282 struct ntfs_sb_info *sbi = sb->s_fs_info;
1283 struct block_device *bdev = sb->s_bdev;
1284 sector_t devblock = (u64)lcn * sbi->blocks_per_cluster;
1285 unsigned long blocks = (u64)len * sbi->blocks_per_cluster;
1286 unsigned long cnt = 0;
1287 unsigned long limit = global_zone_page_state(NR_FREE_PAGES)
1288 << (PAGE_SHIFT - sb->s_blocksize_bits);
1289
1290 if (limit >= 0x2000)
1291 limit -= 0x1000;
1292 else if (limit < 32)
1293 limit = 32;
1294 else
1295 limit >>= 1;
1296
1297 while (blocks--) {
1298 clean_bdev_aliases(bdev, devblock++, 1);
1299 if (cnt++ >= limit) {
1300 sync_blockdev(bdev);
1301 cnt = 0;
1302 }
1303 }
1304}
1305
1306
1307
1308
1309int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len)
1310{
1311 int err;
1312 u64 lbo, bytes, start, end;
1313 struct super_block *sb;
1314
1315 if (sbi->used.next_free_lcn == lcn + len)
1316 sbi->used.next_free_lcn = lcn;
1317
1318 if (sbi->flags & NTFS_FLAGS_NODISCARD)
1319 return -EOPNOTSUPP;
1320
1321 if (!sbi->options->discard)
1322 return -EOPNOTSUPP;
1323
1324 lbo = (u64)lcn << sbi->cluster_bits;
1325 bytes = (u64)len << sbi->cluster_bits;
1326
1327
1328 start = (lbo + sbi->discard_granularity - 1) &
1329 sbi->discard_granularity_mask_inv;
1330
1331 end = (lbo + bytes) & sbi->discard_granularity_mask_inv;
1332
1333 sb = sbi->sb;
1334 if (start >= end)
1335 return 0;
1336
1337 err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9,
1338 GFP_NOFS, 0);
1339
1340 if (err == -EOPNOTSUPP)
1341 sbi->flags |= NTFS_FLAGS_NODISCARD;
1342
1343 return err;
1344}
1345
1346static int ntfs_fs_get_tree(struct fs_context *fc)
1347{
1348 return get_tree_bdev(fc, ntfs_fill_super);
1349}
1350
1351
1352
1353
1354
1355
1356
1357static void ntfs_fs_free(struct fs_context *fc)
1358{
1359 struct ntfs_mount_options *opts = fc->fs_private;
1360 struct ntfs_sb_info *sbi = fc->s_fs_info;
1361
1362 if (sbi)
1363 put_ntfs(sbi);
1364
1365 if (opts)
1366 put_mount_options(opts);
1367}
1368
1369static const struct fs_context_operations ntfs_context_ops = {
1370 .parse_param = ntfs_fs_parse_param,
1371 .get_tree = ntfs_fs_get_tree,
1372 .reconfigure = ntfs_fs_reconfigure,
1373 .free = ntfs_fs_free,
1374};
1375
1376
1377
1378
1379
1380
1381
1382static int ntfs_init_fs_context(struct fs_context *fc)
1383{
1384 struct ntfs_mount_options *opts;
1385 struct ntfs_sb_info *sbi;
1386
1387 opts = kzalloc(sizeof(struct ntfs_mount_options), GFP_NOFS);
1388 if (!opts)
1389 return -ENOMEM;
1390
1391
1392 opts->fs_uid = current_uid();
1393 opts->fs_gid = current_gid();
1394 opts->fs_fmask_inv = ~current_umask();
1395 opts->fs_dmask_inv = ~current_umask();
1396
1397 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE)
1398 goto ok;
1399
1400 sbi = kzalloc(sizeof(struct ntfs_sb_info), GFP_NOFS);
1401 if (!sbi)
1402 goto free_opts;
1403
1404 sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL);
1405 if (!sbi->upcase)
1406 goto free_sbi;
1407
1408 ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL,
1409 DEFAULT_RATELIMIT_BURST);
1410
1411 mutex_init(&sbi->compress.mtx_lznt);
1412#ifdef CONFIG_NTFS3_LZX_XPRESS
1413 mutex_init(&sbi->compress.mtx_xpress);
1414 mutex_init(&sbi->compress.mtx_lzx);
1415#endif
1416
1417 sbi->options = opts;
1418 fc->s_fs_info = sbi;
1419ok:
1420 fc->fs_private = opts;
1421 fc->ops = &ntfs_context_ops;
1422
1423 return 0;
1424free_sbi:
1425 kfree(sbi);
1426free_opts:
1427 kfree(opts);
1428 return -ENOMEM;
1429}
1430
1431
1432static struct file_system_type ntfs_fs_type = {
1433 .owner = THIS_MODULE,
1434 .name = "ntfs3",
1435 .init_fs_context = ntfs_init_fs_context,
1436 .parameters = ntfs_fs_parameters,
1437 .kill_sb = kill_block_super,
1438 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
1439};
1440
1441
1442static int __init init_ntfs_fs(void)
1443{
1444 int err;
1445
1446 pr_info("ntfs3: Max link count %u\n", NTFS_LINK_MAX);
1447
1448 if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL))
1449 pr_info("ntfs3: Enabled Linux POSIX ACLs support\n");
1450 if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER))
1451 pr_notice("ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n");
1452 if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS))
1453 pr_info("ntfs3: Read-only LZX/Xpress compression included\n");
1454
1455 err = ntfs3_init_bitmap();
1456 if (err)
1457 return err;
1458
1459 ntfs_inode_cachep = kmem_cache_create(
1460 "ntfs_inode_cache", sizeof(struct ntfs_inode), 0,
1461 (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT),
1462 init_once);
1463 if (!ntfs_inode_cachep) {
1464 err = -ENOMEM;
1465 goto out1;
1466 }
1467
1468 err = register_filesystem(&ntfs_fs_type);
1469 if (err)
1470 goto out;
1471
1472 return 0;
1473out:
1474 kmem_cache_destroy(ntfs_inode_cachep);
1475out1:
1476 ntfs3_exit_bitmap();
1477 return err;
1478}
1479
1480static void __exit exit_ntfs_fs(void)
1481{
1482 if (ntfs_inode_cachep) {
1483 rcu_barrier();
1484 kmem_cache_destroy(ntfs_inode_cachep);
1485 }
1486
1487 unregister_filesystem(&ntfs_fs_type);
1488 ntfs3_exit_bitmap();
1489}
1490
1491MODULE_LICENSE("GPL");
1492MODULE_DESCRIPTION("ntfs3 read/write filesystem");
1493#ifdef CONFIG_NTFS3_FS_POSIX_ACL
1494MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support");
1495#endif
1496#ifdef CONFIG_NTFS3_64BIT_CLUSTER
1497MODULE_INFO(cluster, "Warning: Activated 64 bits per cluster. Windows does not support this");
1498#endif
1499#ifdef CONFIG_NTFS3_LZX_XPRESS
1500MODULE_INFO(compression, "Read-only lzx/xpress compression included");
1501#endif
1502
1503MODULE_AUTHOR("Konstantin Komarov");
1504MODULE_ALIAS_FS("ntfs3");
1505
1506module_init(init_ntfs_fs);
1507module_exit(exit_ntfs_fs);
1508
