1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
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.
20 * WSL - Windows Subsystem for Linux
21 * https://docs.microsoft.com/en-us/windows/wsl/file-permissions
22 * It stores uid/gid/mode/dev in xattr
24 * ntfs allows up to 2^64 clusters per volume.
25 * It means you should use 64 bits lcn to operate with ntfs.
26 * Implementation of ntfs.sys uses only 32 bits lcn.
27 * Default ntfs3 uses 32 bits lcn too.
28 * ntfs3 built with CONFIG_NTFS3_64BIT_CLUSTER (ntfs3_64) uses 64 bits per lcn.
31 * ntfs limits, cluster size is 4K (2^12)
32 * -----------------------------------------------------------------------------
33 * | Volume size | Clusters | ntfs.sys | ntfs3 | ntfs3_64 | mkntfs | chkdsk |
34 * -----------------------------------------------------------------------------
35 * | < 16T, 2^44 | < 2^32 | yes | yes | yes | yes | yes |
36 * | > 16T, 2^44 | > 2^32 | no | no | yes | yes | yes |
37 * ----------------------------------------------------------|------------------
39 * To mount large volumes as ntfs one should use large cluster size (up to 2M)
40 * The maximum volume size in this case is 2^32 * 2^21 = 2^53 = 8P
42 * ntfs limits, cluster size is 2M (2^31)
43 * -----------------------------------------------------------------------------
44 * | < 8P, 2^54 | < 2^32 | yes | yes | yes | yes | yes |
45 * | > 8P, 2^54 | > 2^32 | no | no | yes | yes | yes |
46 * ----------------------------------------------------------|------------------
50 #include <linux/blkdev.h>
51 #include <linux/buffer_head.h>
52 #include <linux/exportfs.h>
54 #include <linux/fs_context.h>
55 #include <linux/fs_parser.h>
56 #include <linux/log2.h>
57 #include <linux/minmax.h>
58 #include <linux/module.h>
59 #include <linux/nls.h>
60 #include <linux/seq_file.h>
61 #include <linux/statfs.h>
66 #ifdef CONFIG_NTFS3_LZX_XPRESS
72 * ntfs_printk - Trace warnings/notices/errors.
74 * Thanks Joe Perches <joe@perches.com> for implementation
76 void ntfs_printk(const struct super_block
*sb
, const char *fmt
, ...)
81 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
83 /* Should we use different ratelimits for warnings/notices/errors? */
84 if (!___ratelimit(&sbi
->msg_ratelimit
, "ntfs3"))
89 level
= printk_get_level(fmt
);
90 vaf
.fmt
= printk_skip_level(fmt
);
92 printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII
, level
, sb
->s_id
, &vaf
);
97 static char s_name_buf
[512];
98 static atomic_t s_name_buf_cnt
= ATOMIC_INIT(1); // 1 means 'free s_name_buf'.
103 * Print warnings/notices/errors about inode using name or inode number.
105 void ntfs_inode_printk(struct inode
*inode
, const char *fmt
, ...)
107 struct super_block
*sb
= inode
->i_sb
;
108 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
111 struct va_format vaf
;
114 if (!___ratelimit(&sbi
->msg_ratelimit
, "ntfs3"))
117 /* Use static allocated buffer, if possible. */
118 name
= atomic_dec_and_test(&s_name_buf_cnt
)
120 : kmalloc(sizeof(s_name_buf
), GFP_NOFS
);
123 struct dentry
*de
= d_find_alias(inode
);
124 const u32 name_len
= ARRAY_SIZE(s_name_buf
) - 1;
127 spin_lock(&de
->d_lock
);
128 snprintf(name
, name_len
, " \"%s\"", de
->d_name
.name
);
129 spin_unlock(&de
->d_lock
);
130 name
[name_len
] = 0; /* To be sure. */
134 dput(de
); /* Cocci warns if placed in branch "if (de)" */
139 level
= printk_get_level(fmt
);
140 vaf
.fmt
= printk_skip_level(fmt
);
143 printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII
, level
,
144 sb
->s_id
, inode
->i_ino
, name
? name
: "", &vaf
);
148 atomic_inc(&s_name_buf_cnt
);
149 if (name
!= s_name_buf
)
155 * Shared memory struct.
157 * On-disk ntfs's upcase table is created by ntfs formatter.
158 * 'upcase' table is 128K bytes of memory.
159 * We should read it into memory when mounting.
160 * Several ntfs volumes likely use the same 'upcase' table.
161 * It is good idea to share in-memory 'upcase' table between different volumes.
162 * Unfortunately winxp/vista/win7 use different upcase tables.
164 static DEFINE_SPINLOCK(s_shared_lock
);
176 * * @ptr - If pointer was saved in shared memory.
177 * * NULL - If pointer was not shared.
179 void *ntfs_set_shared(void *ptr
, u32 bytes
)
184 spin_lock(&s_shared_lock
);
185 for (i
= 0; i
< ARRAY_SIZE(s_shared
); i
++) {
186 if (!s_shared
[i
].cnt
) {
188 } else if (bytes
== s_shared
[i
].len
&&
189 !memcmp(s_shared
[i
].ptr
, ptr
, bytes
)) {
190 s_shared
[i
].cnt
+= 1;
191 ret
= s_shared
[i
].ptr
;
196 if (!ret
&& j
!= -1) {
197 s_shared
[j
].ptr
= ptr
;
198 s_shared
[j
].len
= bytes
;
202 spin_unlock(&s_shared_lock
);
211 * * @ptr - If pointer is not shared anymore.
212 * * NULL - If pointer is still shared.
214 void *ntfs_put_shared(void *ptr
)
219 spin_lock(&s_shared_lock
);
220 for (i
= 0; i
< ARRAY_SIZE(s_shared
); i
++) {
221 if (s_shared
[i
].cnt
&& s_shared
[i
].ptr
== ptr
) {
222 if (--s_shared
[i
].cnt
)
227 spin_unlock(&s_shared_lock
);
232 static inline void put_mount_options(struct ntfs_mount_options
*options
)
234 kfree(options
->nls_name
);
235 unload_nls(options
->nls
);
261 static const struct fs_parameter_spec ntfs_fs_parameters
[] = {
262 fsparam_u32("uid", Opt_uid
),
263 fsparam_u32("gid", Opt_gid
),
264 fsparam_u32oct("umask", Opt_umask
),
265 fsparam_u32oct("dmask", Opt_dmask
),
266 fsparam_u32oct("fmask", Opt_fmask
),
267 fsparam_flag_no("sys_immutable", Opt_immutable
),
268 fsparam_flag_no("discard", Opt_discard
),
269 fsparam_flag_no("force", Opt_force
),
270 fsparam_flag_no("sparse", Opt_sparse
),
271 fsparam_flag_no("hidden", Opt_nohidden
),
272 fsparam_flag_no("hide_dot_files", Opt_hide_dot_files
),
273 fsparam_flag_no("windows_names", Opt_windows_names
),
274 fsparam_flag_no("acl", Opt_acl
),
275 fsparam_flag_no("showmeta", Opt_showmeta
),
276 fsparam_flag_no("prealloc", Opt_prealloc
),
277 fsparam_flag_no("acsrules", Opt_noacsrules
),
278 fsparam_flag_no("nocase", Opt_nocase
),
279 fsparam_string("iocharset", Opt_iocharset
),
284 * Load nls table or if @nls is utf8 then return NULL.
286 static struct nls_table
*ntfs_load_nls(char *nls
)
288 struct nls_table
*ret
;
291 nls
= CONFIG_NLS_DEFAULT
;
293 if (strcmp(nls
, "utf8") == 0)
296 if (strcmp(nls
, CONFIG_NLS_DEFAULT
) == 0)
297 return load_nls_default();
303 return ERR_PTR(-EINVAL
);
306 static int ntfs_fs_parse_param(struct fs_context
*fc
,
307 struct fs_parameter
*param
)
309 struct ntfs_mount_options
*opts
= fc
->fs_private
;
310 struct fs_parse_result result
;
313 opt
= fs_parse(fc
, ntfs_fs_parameters
, param
, &result
);
319 opts
->fs_uid
= make_kuid(current_user_ns(), result
.uint_32
);
320 if (!uid_valid(opts
->fs_uid
))
321 return invalf(fc
, "ntfs3: Invalid value for uid.");
324 opts
->fs_gid
= make_kgid(current_user_ns(), result
.uint_32
);
325 if (!gid_valid(opts
->fs_gid
))
326 return invalf(fc
, "ntfs3: Invalid value for gid.");
329 if (result
.uint_32
& ~07777)
330 return invalf(fc
, "ntfs3: Invalid value for umask.");
331 opts
->fs_fmask_inv
= ~result
.uint_32
;
332 opts
->fs_dmask_inv
= ~result
.uint_32
;
337 if (result
.uint_32
& ~07777)
338 return invalf(fc
, "ntfs3: Invalid value for dmask.");
339 opts
->fs_dmask_inv
= ~result
.uint_32
;
343 if (result
.uint_32
& ~07777)
344 return invalf(fc
, "ntfs3: Invalid value for fmask.");
345 opts
->fs_fmask_inv
= ~result
.uint_32
;
349 opts
->sys_immutable
= result
.negated
? 0 : 1;
352 opts
->discard
= result
.negated
? 0 : 1;
355 opts
->force
= result
.negated
? 0 : 1;
358 opts
->sparse
= result
.negated
? 0 : 1;
361 opts
->nohidden
= result
.negated
? 1 : 0;
363 case Opt_hide_dot_files
:
364 opts
->hide_dot_files
= result
.negated
? 0 : 1;
366 case Opt_windows_names
:
367 opts
->windows_names
= result
.negated
? 0 : 1;
371 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
372 fc
->sb_flags
|= SB_POSIXACL
;
374 return invalf(fc
, "ntfs3: Support for ACL not compiled in!");
377 fc
->sb_flags
&= ~SB_POSIXACL
;
380 opts
->showmeta
= result
.negated
? 0 : 1;
383 kfree(opts
->nls_name
);
384 opts
->nls_name
= param
->string
;
385 param
->string
= NULL
;
388 opts
->prealloc
= result
.negated
? 0 : 1;
391 opts
->noacsrules
= result
.negated
? 1 : 0;
394 opts
->nocase
= result
.negated
? 1 : 0;
397 /* Should not be here unless we forget add case. */
403 static int ntfs_fs_reconfigure(struct fs_context
*fc
)
405 struct super_block
*sb
= fc
->root
->d_sb
;
406 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
407 struct ntfs_mount_options
*new_opts
= fc
->fs_private
;
410 ro_rw
= sb_rdonly(sb
) && !(fc
->sb_flags
& SB_RDONLY
);
411 if (ro_rw
&& (sbi
->flags
& NTFS_FLAGS_NEED_REPLAY
)) {
412 errorf(fc
, "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n");
416 new_opts
->nls
= ntfs_load_nls(new_opts
->nls_name
);
417 if (IS_ERR(new_opts
->nls
)) {
418 new_opts
->nls
= NULL
;
419 errorf(fc
, "ntfs3: Cannot load iocharset %s", new_opts
->nls_name
);
422 if (new_opts
->nls
!= sbi
->options
->nls
)
423 return invalf(fc
, "ntfs3: Cannot use different iocharset when remounting!");
427 if (ro_rw
&& (sbi
->volume
.flags
& VOLUME_FLAG_DIRTY
) &&
429 errorf(fc
, "ntfs3: Volume is dirty and \"force\" flag is not set!");
433 swap(sbi
->options
, fc
->fs_private
);
438 static struct kmem_cache
*ntfs_inode_cachep
;
440 static struct inode
*ntfs_alloc_inode(struct super_block
*sb
)
442 struct ntfs_inode
*ni
= alloc_inode_sb(sb
, ntfs_inode_cachep
, GFP_NOFS
);
447 memset(ni
, 0, offsetof(struct ntfs_inode
, vfs_inode
));
448 mutex_init(&ni
->ni_lock
);
449 return &ni
->vfs_inode
;
452 static void ntfs_free_inode(struct inode
*inode
)
454 struct ntfs_inode
*ni
= ntfs_i(inode
);
456 mutex_destroy(&ni
->ni_lock
);
457 kmem_cache_free(ntfs_inode_cachep
, ni
);
460 static void init_once(void *foo
)
462 struct ntfs_inode
*ni
= foo
;
464 inode_init_once(&ni
->vfs_inode
);
468 * put_ntfs - Noinline to reduce binary size.
470 static noinline
void put_ntfs(struct ntfs_sb_info
*sbi
)
473 kvfree(ntfs_put_shared(sbi
->upcase
));
474 kfree(sbi
->def_table
);
476 wnd_close(&sbi
->mft
.bitmap
);
477 wnd_close(&sbi
->used
.bitmap
);
480 iput(&sbi
->mft
.ni
->vfs_inode
);
482 if (sbi
->security
.ni
)
483 iput(&sbi
->security
.ni
->vfs_inode
);
486 iput(&sbi
->reparse
.ni
->vfs_inode
);
489 iput(&sbi
->objid
.ni
->vfs_inode
);
492 iput(&sbi
->volume
.ni
->vfs_inode
);
494 ntfs_update_mftmirr(sbi
, 0);
496 indx_clear(&sbi
->security
.index_sii
);
497 indx_clear(&sbi
->security
.index_sdh
);
498 indx_clear(&sbi
->reparse
.index_r
);
499 indx_clear(&sbi
->objid
.index_o
);
500 kfree(sbi
->compress
.lznt
);
501 #ifdef CONFIG_NTFS3_LZX_XPRESS
502 xpress_free_decompressor(sbi
->compress
.xpress
);
503 lzx_free_decompressor(sbi
->compress
.lzx
);
508 static void ntfs_put_super(struct super_block
*sb
)
510 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
512 /* Mark rw ntfs as clear, if possible. */
513 ntfs_set_state(sbi
, NTFS_DIRTY_CLEAR
);
515 put_mount_options(sbi
->options
);
517 sb
->s_fs_info
= NULL
;
519 sync_blockdev(sb
->s_bdev
);
522 static int ntfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
524 struct super_block
*sb
= dentry
->d_sb
;
525 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
526 struct wnd_bitmap
*wnd
= &sbi
->used
.bitmap
;
528 buf
->f_type
= sb
->s_magic
;
529 buf
->f_bsize
= sbi
->cluster_size
;
530 buf
->f_blocks
= wnd
->nbits
;
532 buf
->f_bfree
= buf
->f_bavail
= wnd_zeroes(wnd
);
533 buf
->f_fsid
.val
[0] = sbi
->volume
.ser_num
;
534 buf
->f_fsid
.val
[1] = (sbi
->volume
.ser_num
>> 32);
535 buf
->f_namelen
= NTFS_NAME_LEN
;
540 static int ntfs_show_options(struct seq_file
*m
, struct dentry
*root
)
542 struct super_block
*sb
= root
->d_sb
;
543 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
544 struct ntfs_mount_options
*opts
= sbi
->options
;
545 struct user_namespace
*user_ns
= seq_user_ns(m
);
547 seq_printf(m
, ",uid=%u",
548 from_kuid_munged(user_ns
, opts
->fs_uid
));
549 seq_printf(m
, ",gid=%u",
550 from_kgid_munged(user_ns
, opts
->fs_gid
));
552 seq_printf(m
, ",fmask=%04o", opts
->fs_fmask_inv
^ 0xffff);
554 seq_printf(m
, ",dmask=%04o", opts
->fs_dmask_inv
^ 0xffff);
556 seq_printf(m
, ",iocharset=%s", opts
->nls
->charset
);
558 seq_puts(m
, ",iocharset=utf8");
559 if (opts
->sys_immutable
)
560 seq_puts(m
, ",sys_immutable");
562 seq_puts(m
, ",discard");
564 seq_puts(m
, ",sparse");
566 seq_puts(m
, ",showmeta");
568 seq_puts(m
, ",nohidden");
569 if (opts
->windows_names
)
570 seq_puts(m
, ",windows_names");
571 if (opts
->hide_dot_files
)
572 seq_puts(m
, ",hide_dot_files");
574 seq_puts(m
, ",force");
575 if (opts
->noacsrules
)
576 seq_puts(m
, ",noacsrules");
578 seq_puts(m
, ",prealloc");
579 if (sb
->s_flags
& SB_POSIXACL
)
586 * ntfs_sync_fs - super_operations::sync_fs
588 static int ntfs_sync_fs(struct super_block
*sb
, int wait
)
591 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
592 struct ntfs_inode
*ni
;
595 ni
= sbi
->security
.ni
;
597 inode
= &ni
->vfs_inode
;
598 err2
= _ni_write_inode(inode
, wait
);
605 inode
= &ni
->vfs_inode
;
606 err2
= _ni_write_inode(inode
, wait
);
611 ni
= sbi
->reparse
.ni
;
613 inode
= &ni
->vfs_inode
;
614 err2
= _ni_write_inode(inode
, wait
);
620 ntfs_set_state(sbi
, NTFS_DIRTY_CLEAR
);
622 ntfs_update_mftmirr(sbi
, wait
);
627 static const struct super_operations ntfs_sops
= {
628 .alloc_inode
= ntfs_alloc_inode
,
629 .free_inode
= ntfs_free_inode
,
630 .evict_inode
= ntfs_evict_inode
,
631 .put_super
= ntfs_put_super
,
632 .statfs
= ntfs_statfs
,
633 .show_options
= ntfs_show_options
,
634 .sync_fs
= ntfs_sync_fs
,
635 .write_inode
= ntfs3_write_inode
,
638 static struct inode
*ntfs_export_get_inode(struct super_block
*sb
, u64 ino
,
644 ref
.low
= cpu_to_le32(ino
);
645 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
646 ref
.high
= cpu_to_le16(ino
>> 32);
650 ref
.seq
= cpu_to_le16(generation
);
652 inode
= ntfs_iget5(sb
, &ref
, NULL
);
653 if (!IS_ERR(inode
) && is_bad_inode(inode
)) {
655 inode
= ERR_PTR(-ESTALE
);
661 static struct dentry
*ntfs_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
662 int fh_len
, int fh_type
)
664 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
665 ntfs_export_get_inode
);
668 static struct dentry
*ntfs_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
669 int fh_len
, int fh_type
)
671 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
672 ntfs_export_get_inode
);
675 /* TODO: == ntfs_sync_inode */
676 static int ntfs_nfs_commit_metadata(struct inode
*inode
)
678 return _ni_write_inode(inode
, 1);
681 static const struct export_operations ntfs_export_ops
= {
682 .fh_to_dentry
= ntfs_fh_to_dentry
,
683 .fh_to_parent
= ntfs_fh_to_parent
,
684 .get_parent
= ntfs3_get_parent
,
685 .commit_metadata
= ntfs_nfs_commit_metadata
,
689 * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb".
691 static u32
format_size_gb(const u64 bytes
, u32
*mb
)
693 /* Do simple right 30 bit shift of 64 bit value. */
694 u64 kbytes
= bytes
>> 10;
695 u32 kbytes32
= kbytes
;
697 *mb
= (100 * (kbytes32
& 0xfffff) + 0x7ffff) >> 20;
701 return (kbytes32
>> 20) | (((u32
)(kbytes
>> 32)) << 12);
704 static u32
true_sectors_per_clst(const struct NTFS_BOOT
*boot
)
706 if (boot
->sectors_per_clusters
<= 0x80)
707 return boot
->sectors_per_clusters
;
708 if (boot
->sectors_per_clusters
>= 0xf4) /* limit shift to 2MB max */
709 return 1U << -(s8
)boot
->sectors_per_clusters
;
714 * ntfs_init_from_boot - Init internal info from on-disk boot sector.
716 static int ntfs_init_from_boot(struct super_block
*sb
, u32 sector_size
,
719 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
721 u32 mb
, gb
, boot_sector_size
, sct_per_clst
, record_size
;
722 u64 sectors
, clusters
, mlcn
, mlcn2
;
723 struct NTFS_BOOT
*boot
;
724 struct buffer_head
*bh
;
728 sbi
->volume
.blocks
= dev_size
>> PAGE_SHIFT
;
730 bh
= ntfs_bread(sb
, 0);
735 boot
= (struct NTFS_BOOT
*)bh
->b_data
;
737 if (memcmp(boot
->system_id
, "NTFS ", sizeof("NTFS ") - 1))
740 /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/
741 /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1])
745 boot_sector_size
= (u32
)boot
->bytes_per_sector
[1] << 8;
746 if (boot
->bytes_per_sector
[0] || boot_sector_size
< SECTOR_SIZE
||
747 !is_power_of_2(boot_sector_size
)) {
751 /* cluster size: 512, 1K, 2K, 4K, ... 2M */
752 sct_per_clst
= true_sectors_per_clst(boot
);
753 if ((int)sct_per_clst
< 0)
755 if (!is_power_of_2(sct_per_clst
))
758 mlcn
= le64_to_cpu(boot
->mft_clst
);
759 mlcn2
= le64_to_cpu(boot
->mft2_clst
);
760 sectors
= le64_to_cpu(boot
->sectors_per_volume
);
762 if (mlcn
* sct_per_clst
>= sectors
)
765 if (mlcn2
* sct_per_clst
>= sectors
)
768 /* Check MFT record size. */
769 if ((boot
->record_size
< 0 &&
770 SECTOR_SIZE
> (2U << (-boot
->record_size
))) ||
771 (boot
->record_size
>= 0 && !is_power_of_2(boot
->record_size
))) {
775 /* Check index record size. */
776 if ((boot
->index_size
< 0 &&
777 SECTOR_SIZE
> (2U << (-boot
->index_size
))) ||
778 (boot
->index_size
>= 0 && !is_power_of_2(boot
->index_size
))) {
782 sbi
->volume
.size
= sectors
* boot_sector_size
;
784 gb
= format_size_gb(sbi
->volume
.size
+ boot_sector_size
, &mb
);
787 * - Volume formatted and mounted with the same sector size.
788 * - Volume formatted 4K and mounted as 512.
789 * - Volume formatted 512 and mounted as 4K.
791 if (boot_sector_size
!= sector_size
) {
794 "Different NTFS' sector size (%u) and media sector size (%u)",
795 boot_sector_size
, sector_size
);
796 dev_size
+= sector_size
- 1;
799 sbi
->cluster_size
= boot_sector_size
* sct_per_clst
;
800 sbi
->cluster_bits
= blksize_bits(sbi
->cluster_size
);
802 sbi
->mft
.lbo
= mlcn
<< sbi
->cluster_bits
;
803 sbi
->mft
.lbo2
= mlcn2
<< sbi
->cluster_bits
;
805 /* Compare boot's cluster and sector. */
806 if (sbi
->cluster_size
< boot_sector_size
)
809 /* Compare boot's cluster and media sector. */
810 if (sbi
->cluster_size
< sector_size
) {
811 /* No way to use ntfs_get_block in this case. */
814 "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u)",
815 sbi
->cluster_size
, sector_size
);
819 sbi
->cluster_mask
= sbi
->cluster_size
- 1;
820 sbi
->cluster_mask_inv
= ~(u64
)sbi
->cluster_mask
;
821 sbi
->record_size
= record_size
= boot
->record_size
< 0
822 ? 1 << (-boot
->record_size
)
823 : (u32
)boot
->record_size
824 << sbi
->cluster_bits
;
826 if (record_size
> MAXIMUM_BYTES_PER_MFT
|| record_size
< SECTOR_SIZE
)
829 sbi
->record_bits
= blksize_bits(record_size
);
830 sbi
->attr_size_tr
= (5 * record_size
>> 4); // ~320 bytes
832 sbi
->max_bytes_per_attr
=
833 record_size
- ALIGN(MFTRECORD_FIXUP_OFFSET_1
, 8) -
834 ALIGN(((record_size
>> SECTOR_SHIFT
) * sizeof(short)), 8) -
835 ALIGN(sizeof(enum ATTR_TYPE
), 8);
837 sbi
->index_size
= boot
->index_size
< 0
838 ? 1u << (-boot
->index_size
)
839 : (u32
)boot
->index_size
<< sbi
->cluster_bits
;
841 sbi
->volume
.ser_num
= le64_to_cpu(boot
->serial_num
);
843 /* Warning if RAW volume. */
844 if (dev_size
< sbi
->volume
.size
+ boot_sector_size
) {
847 gb0
= format_size_gb(dev_size
, &mb0
);
850 "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only",
852 sb
->s_flags
|= SB_RDONLY
;
855 clusters
= sbi
->volume
.size
>> sbi
->cluster_bits
;
856 #ifndef CONFIG_NTFS3_64BIT_CLUSTER
857 /* 32 bits per cluster. */
858 if (clusters
>> 32) {
861 "NTFS %u.%02u Gb is too big to use 32 bits per cluster",
865 #elif BITS_PER_LONG < 64
866 #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS"
869 sbi
->used
.bitmap
.nbits
= clusters
;
871 rec
= kzalloc(record_size
, GFP_NOFS
);
878 rec
->rhdr
.sign
= NTFS_FILE_SIGNATURE
;
879 rec
->rhdr
.fix_off
= cpu_to_le16(MFTRECORD_FIXUP_OFFSET_1
);
880 fn
= (sbi
->record_size
>> SECTOR_SHIFT
) + 1;
881 rec
->rhdr
.fix_num
= cpu_to_le16(fn
);
882 ao
= ALIGN(MFTRECORD_FIXUP_OFFSET_1
+ sizeof(short) * fn
, 8);
883 rec
->attr_off
= cpu_to_le16(ao
);
884 rec
->used
= cpu_to_le32(ao
+ ALIGN(sizeof(enum ATTR_TYPE
), 8));
885 rec
->total
= cpu_to_le32(sbi
->record_size
);
886 ((struct ATTRIB
*)Add2Ptr(rec
, ao
))->type
= ATTR_END
;
888 sb_set_blocksize(sb
, min_t(u32
, sbi
->cluster_size
, PAGE_SIZE
));
890 sbi
->block_mask
= sb
->s_blocksize
- 1;
891 sbi
->blocks_per_cluster
= sbi
->cluster_size
>> sb
->s_blocksize_bits
;
892 sbi
->volume
.blocks
= sbi
->volume
.size
>> sb
->s_blocksize_bits
;
894 /* Maximum size for normal files. */
895 sbi
->maxbytes
= (clusters
<< sbi
->cluster_bits
) - 1;
897 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
898 if (clusters
>= (1ull << (64 - sbi
->cluster_bits
)))
900 sbi
->maxbytes_sparse
= -1;
901 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
903 /* Maximum size for sparse file. */
904 sbi
->maxbytes_sparse
= (1ull << (sbi
->cluster_bits
+ 32)) - 1;
905 sb
->s_maxbytes
= 0xFFFFFFFFull
<< sbi
->cluster_bits
;
909 * Compute the MFT zone at two steps.
910 * It would be nice if we are able to allocate 1/8 of
911 * total clusters for MFT but not more then 512 MB.
913 sbi
->zone_max
= min_t(CLST
, 0x20000000 >> sbi
->cluster_bits
, clusters
>> 3);
924 * ntfs_fill_super - Try to mount.
926 static int ntfs_fill_super(struct super_block
*sb
, struct fs_context
*fc
)
929 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
930 struct block_device
*bdev
= sb
->s_bdev
;
932 struct ntfs_inode
*ni
;
933 size_t i
, tt
, bad_len
, bad_frags
;
936 const struct VOLUME_INFO
*info
;
937 u32 idx
, done
, bytes
;
938 struct ATTR_DEF_ENTRY
*t
;
945 sbi
->options
= fc
->fs_private
;
946 fc
->fs_private
= NULL
;
947 sb
->s_flags
|= SB_NODIRATIME
;
948 sb
->s_magic
= 0x7366746e; // "ntfs"
949 sb
->s_op
= &ntfs_sops
;
950 sb
->s_export_op
= &ntfs_export_ops
;
951 sb
->s_time_gran
= NTFS_TIME_GRAN
; // 100 nsec
952 sb
->s_xattr
= ntfs_xattr_handlers
;
953 sb
->s_d_op
= sbi
->options
->nocase
? &ntfs_dentry_ops
: NULL
;
955 sbi
->options
->nls
= ntfs_load_nls(sbi
->options
->nls_name
);
956 if (IS_ERR(sbi
->options
->nls
)) {
957 sbi
->options
->nls
= NULL
;
958 errorf(fc
, "Cannot load nls %s", sbi
->options
->nls_name
);
963 if (bdev_max_discard_sectors(bdev
) && bdev_discard_granularity(bdev
)) {
964 sbi
->discard_granularity
= bdev_discard_granularity(bdev
);
965 sbi
->discard_granularity_mask_inv
=
966 ~(u64
)(sbi
->discard_granularity
- 1);
970 err
= ntfs_init_from_boot(sb
, bdev_logical_block_size(bdev
),
971 bdev_nr_bytes(bdev
));
976 * Load $Volume. This should be done before $LogFile
977 * 'cause 'sbi->volume.ni' is used 'ntfs_set_state'.
979 ref
.low
= cpu_to_le32(MFT_REC_VOL
);
980 ref
.seq
= cpu_to_le16(MFT_REC_VOL
);
981 inode
= ntfs_iget5(sb
, &ref
, &NAME_VOLUME
);
983 ntfs_err(sb
, "Failed to load $Volume.");
984 err
= PTR_ERR(inode
);
990 /* Load and save label (not necessary). */
991 attr
= ni_find_attr(ni
, NULL
, NULL
, ATTR_LABEL
, NULL
, 0, NULL
, NULL
);
994 /* It is ok if no ATTR_LABEL */
995 } else if (!attr
->non_res
&& !is_attr_ext(attr
)) {
996 /* $AttrDef allows labels to be up to 128 symbols. */
997 err
= utf16s_to_utf8s(resident_data(attr
),
998 le32_to_cpu(attr
->res
.data_size
) >> 1,
999 UTF16_LITTLE_ENDIAN
, sbi
->volume
.label
,
1000 sizeof(sbi
->volume
.label
));
1002 sbi
->volume
.label
[0] = 0;
1004 /* Should we break mounting here? */
1006 //goto put_inode_out;
1009 attr
= ni_find_attr(ni
, attr
, NULL
, ATTR_VOL_INFO
, NULL
, 0, NULL
, NULL
);
1010 if (!attr
|| is_attr_ext(attr
)) {
1015 info
= resident_data_ex(attr
, SIZEOF_ATTRIBUTE_VOLUME_INFO
);
1021 sbi
->volume
.major_ver
= info
->major_ver
;
1022 sbi
->volume
.minor_ver
= info
->minor_ver
;
1023 sbi
->volume
.flags
= info
->flags
;
1024 sbi
->volume
.ni
= ni
;
1026 /* Load $MFTMirr to estimate recs_mirr. */
1027 ref
.low
= cpu_to_le32(MFT_REC_MIRR
);
1028 ref
.seq
= cpu_to_le16(MFT_REC_MIRR
);
1029 inode
= ntfs_iget5(sb
, &ref
, &NAME_MIRROR
);
1030 if (IS_ERR(inode
)) {
1031 ntfs_err(sb
, "Failed to load $MFTMirr.");
1032 err
= PTR_ERR(inode
);
1036 sbi
->mft
.recs_mirr
=
1037 ntfs_up_cluster(sbi
, inode
->i_size
) >> sbi
->record_bits
;
1041 /* Load LogFile to replay. */
1042 ref
.low
= cpu_to_le32(MFT_REC_LOG
);
1043 ref
.seq
= cpu_to_le16(MFT_REC_LOG
);
1044 inode
= ntfs_iget5(sb
, &ref
, &NAME_LOGFILE
);
1045 if (IS_ERR(inode
)) {
1046 ntfs_err(sb
, "Failed to load \x24LogFile.");
1047 err
= PTR_ERR(inode
);
1053 err
= ntfs_loadlog_and_replay(ni
, sbi
);
1059 if (sbi
->flags
& NTFS_FLAGS_NEED_REPLAY
) {
1060 if (!sb_rdonly(sb
)) {
1062 "failed to replay log file. Can't mount rw!");
1066 } else if (sbi
->volume
.flags
& VOLUME_FLAG_DIRTY
) {
1067 if (!sb_rdonly(sb
) && !sbi
->options
->force
) {
1070 "volume is dirty and \"force\" flag is not set!");
1077 ref
.low
= cpu_to_le32(MFT_REC_MFT
);
1078 ref
.seq
= cpu_to_le16(1);
1080 inode
= ntfs_iget5(sb
, &ref
, &NAME_MFT
);
1081 if (IS_ERR(inode
)) {
1082 ntfs_err(sb
, "Failed to load $MFT.");
1083 err
= PTR_ERR(inode
);
1089 sbi
->mft
.used
= ni
->i_valid
>> sbi
->record_bits
;
1090 tt
= inode
->i_size
>> sbi
->record_bits
;
1091 sbi
->mft
.next_free
= MFT_REC_USER
;
1093 err
= wnd_init(&sbi
->mft
.bitmap
, sb
, tt
);
1097 err
= ni_load_all_mi(ni
);
1104 ref
.low
= cpu_to_le32(MFT_REC_BITMAP
);
1105 ref
.seq
= cpu_to_le16(MFT_REC_BITMAP
);
1106 inode
= ntfs_iget5(sb
, &ref
, &NAME_BITMAP
);
1107 if (IS_ERR(inode
)) {
1108 ntfs_err(sb
, "Failed to load $Bitmap.");
1109 err
= PTR_ERR(inode
);
1113 #ifndef CONFIG_NTFS3_64BIT_CLUSTER
1114 if (inode
->i_size
>> 32) {
1120 /* Check bitmap boundary. */
1121 tt
= sbi
->used
.bitmap
.nbits
;
1122 if (inode
->i_size
< bitmap_size(tt
)) {
1127 /* Not necessary. */
1128 sbi
->used
.bitmap
.set_tail
= true;
1129 err
= wnd_init(&sbi
->used
.bitmap
, sb
, tt
);
1135 /* Compute the MFT zone. */
1136 err
= ntfs_refresh_zone(sbi
);
1140 /* Load $BadClus. */
1141 ref
.low
= cpu_to_le32(MFT_REC_BADCLUST
);
1142 ref
.seq
= cpu_to_le16(MFT_REC_BADCLUST
);
1143 inode
= ntfs_iget5(sb
, &ref
, &NAME_BADCLUS
);
1144 if (IS_ERR(inode
)) {
1145 err
= PTR_ERR(inode
);
1146 ntfs_err(sb
, "Failed to load $BadClus (%d).", err
);
1151 bad_len
= bad_frags
= 0;
1152 for (i
= 0; run_get_entry(&ni
->file
.run
, i
, &vcn
, &lcn
, &len
); i
++) {
1153 if (lcn
== SPARSE_LCN
)
1161 if (wnd_set_used_safe(&sbi
->used
.bitmap
, lcn
, len
, &tt
) || tt
) {
1162 /* Bad blocks marked as free in bitmap. */
1163 ntfs_set_state(sbi
, NTFS_DIRTY_ERROR
);
1168 * Notice about bad blocks.
1169 * In normal cases these blocks are marked as used in bitmap.
1170 * And we never allocate space in it.
1173 "Volume contains %zu bad blocks in %zu fragments.",
1174 bad_len
, bad_frags
);
1178 /* Load $AttrDef. */
1179 ref
.low
= cpu_to_le32(MFT_REC_ATTR
);
1180 ref
.seq
= cpu_to_le16(MFT_REC_ATTR
);
1181 inode
= ntfs_iget5(sb
, &ref
, &NAME_ATTRDEF
);
1182 if (IS_ERR(inode
)) {
1183 ntfs_err(sb
, "Failed to load $AttrDef -> %d", err
);
1184 err
= PTR_ERR(inode
);
1188 if (inode
->i_size
< sizeof(struct ATTR_DEF_ENTRY
)) {
1192 bytes
= inode
->i_size
;
1193 sbi
->def_table
= t
= kmalloc(bytes
, GFP_NOFS
| __GFP_NOWARN
);
1199 for (done
= idx
= 0; done
< bytes
; done
+= PAGE_SIZE
, idx
++) {
1200 unsigned long tail
= bytes
- done
;
1201 struct page
*page
= ntfs_map_page(inode
->i_mapping
, idx
);
1204 err
= PTR_ERR(page
);
1207 memcpy(Add2Ptr(t
, done
), page_address(page
),
1208 min(PAGE_SIZE
, tail
));
1209 ntfs_unmap_page(page
);
1211 if (!idx
&& ATTR_STD
!= t
->type
) {
1218 sbi
->def_entries
= 1;
1219 done
= sizeof(struct ATTR_DEF_ENTRY
);
1220 sbi
->reparse
.max_size
= MAXIMUM_REPARSE_DATA_BUFFER_SIZE
;
1221 sbi
->ea_max_size
= 0x10000; /* default formatter value */
1223 while (done
+ sizeof(struct ATTR_DEF_ENTRY
) <= bytes
) {
1224 u32 t32
= le32_to_cpu(t
->type
);
1225 u64 sz
= le64_to_cpu(t
->max_sz
);
1227 if ((t32
& 0xF) || le32_to_cpu(t
[-1].type
) >= t32
)
1230 if (t
->type
== ATTR_REPARSE
)
1231 sbi
->reparse
.max_size
= sz
;
1232 else if (t
->type
== ATTR_EA
)
1233 sbi
->ea_max_size
= sz
;
1235 done
+= sizeof(struct ATTR_DEF_ENTRY
);
1237 sbi
->def_entries
+= 1;
1242 ref
.low
= cpu_to_le32(MFT_REC_UPCASE
);
1243 ref
.seq
= cpu_to_le16(MFT_REC_UPCASE
);
1244 inode
= ntfs_iget5(sb
, &ref
, &NAME_UPCASE
);
1245 if (IS_ERR(inode
)) {
1246 ntfs_err(sb
, "Failed to load $UpCase.");
1247 err
= PTR_ERR(inode
);
1251 if (inode
->i_size
!= 0x10000 * sizeof(short)) {
1256 for (idx
= 0; idx
< (0x10000 * sizeof(short) >> PAGE_SHIFT
); idx
++) {
1258 u16
*dst
= Add2Ptr(sbi
->upcase
, idx
<< PAGE_SHIFT
);
1259 struct page
*page
= ntfs_map_page(inode
->i_mapping
, idx
);
1262 err
= PTR_ERR(page
);
1266 src
= page_address(page
);
1269 for (i
= 0; i
< PAGE_SIZE
/ sizeof(u16
); i
++)
1270 *dst
++ = le16_to_cpu(*src
++);
1272 memcpy(dst
, src
, PAGE_SIZE
);
1274 ntfs_unmap_page(page
);
1277 shared
= ntfs_set_shared(sbi
->upcase
, 0x10000 * sizeof(short));
1278 if (shared
&& sbi
->upcase
!= shared
) {
1279 kvfree(sbi
->upcase
);
1280 sbi
->upcase
= shared
;
1285 if (is_ntfs3(sbi
)) {
1287 err
= ntfs_security_init(sbi
);
1292 err
= ntfs_extend_init(sbi
);
1296 /* Load $Extend\$Reparse. */
1297 err
= ntfs_reparse_init(sbi
);
1301 /* Load $Extend\$ObjId. */
1302 err
= ntfs_objid_init(sbi
);
1309 ref
.low
= cpu_to_le32(MFT_REC_ROOT
);
1310 ref
.seq
= cpu_to_le16(MFT_REC_ROOT
);
1311 inode
= ntfs_iget5(sb
, &ref
, &NAME_ROOT
);
1312 if (IS_ERR(inode
) || !inode
->i_op
) {
1313 ntfs_err(sb
, "Failed to load root.");
1314 err
= IS_ERR(inode
) ? PTR_ERR(inode
) : -EINVAL
;
1318 sb
->s_root
= d_make_root(inode
);
1330 * Free resources here.
1331 * ntfs_fs_free will be called with fc->s_fs_info = NULL
1333 put_mount_options(sbi
->options
);
1335 sb
->s_fs_info
= NULL
;
1340 void ntfs_unmap_meta(struct super_block
*sb
, CLST lcn
, CLST len
)
1342 struct ntfs_sb_info
*sbi
= sb
->s_fs_info
;
1343 struct block_device
*bdev
= sb
->s_bdev
;
1344 sector_t devblock
= (u64
)lcn
* sbi
->blocks_per_cluster
;
1345 unsigned long blocks
= (u64
)len
* sbi
->blocks_per_cluster
;
1346 unsigned long cnt
= 0;
1347 unsigned long limit
= global_zone_page_state(NR_FREE_PAGES
)
1348 << (PAGE_SHIFT
- sb
->s_blocksize_bits
);
1350 if (limit
>= 0x2000)
1352 else if (limit
< 32)
1358 clean_bdev_aliases(bdev
, devblock
++, 1);
1359 if (cnt
++ >= limit
) {
1360 sync_blockdev(bdev
);
1367 * ntfs_discard - Issue a discard request (trim for SSD).
1369 int ntfs_discard(struct ntfs_sb_info
*sbi
, CLST lcn
, CLST len
)
1372 u64 lbo
, bytes
, start
, end
;
1373 struct super_block
*sb
;
1375 if (sbi
->used
.next_free_lcn
== lcn
+ len
)
1376 sbi
->used
.next_free_lcn
= lcn
;
1378 if (sbi
->flags
& NTFS_FLAGS_NODISCARD
)
1381 if (!sbi
->options
->discard
)
1384 lbo
= (u64
)lcn
<< sbi
->cluster_bits
;
1385 bytes
= (u64
)len
<< sbi
->cluster_bits
;
1387 /* Align up 'start' on discard_granularity. */
1388 start
= (lbo
+ sbi
->discard_granularity
- 1) &
1389 sbi
->discard_granularity_mask_inv
;
1390 /* Align down 'end' on discard_granularity. */
1391 end
= (lbo
+ bytes
) & sbi
->discard_granularity_mask_inv
;
1397 err
= blkdev_issue_discard(sb
->s_bdev
, start
>> 9, (end
- start
) >> 9,
1400 if (err
== -EOPNOTSUPP
)
1401 sbi
->flags
|= NTFS_FLAGS_NODISCARD
;
1406 static int ntfs_fs_get_tree(struct fs_context
*fc
)
1408 return get_tree_bdev(fc
, ntfs_fill_super
);
1412 * ntfs_fs_free - Free fs_context.
1414 * Note that this will be called after fill_super and reconfigure
1415 * even when they pass. So they have to take pointers if they pass.
1417 static void ntfs_fs_free(struct fs_context
*fc
)
1419 struct ntfs_mount_options
*opts
= fc
->fs_private
;
1420 struct ntfs_sb_info
*sbi
= fc
->s_fs_info
;
1426 put_mount_options(opts
);
1429 static const struct fs_context_operations ntfs_context_ops
= {
1430 .parse_param
= ntfs_fs_parse_param
,
1431 .get_tree
= ntfs_fs_get_tree
,
1432 .reconfigure
= ntfs_fs_reconfigure
,
1433 .free
= ntfs_fs_free
,
1437 * ntfs_init_fs_context - Initialize spi and opts
1439 * This will called when mount/remount. We will first initialize
1440 * options so that if remount we can use just that.
1442 static int ntfs_init_fs_context(struct fs_context
*fc
)
1444 struct ntfs_mount_options
*opts
;
1445 struct ntfs_sb_info
*sbi
;
1447 opts
= kzalloc(sizeof(struct ntfs_mount_options
), GFP_NOFS
);
1451 /* Default options. */
1452 opts
->fs_uid
= current_uid();
1453 opts
->fs_gid
= current_gid();
1454 opts
->fs_fmask_inv
= ~current_umask();
1455 opts
->fs_dmask_inv
= ~current_umask();
1457 if (fc
->purpose
== FS_CONTEXT_FOR_RECONFIGURE
)
1460 sbi
= kzalloc(sizeof(struct ntfs_sb_info
), GFP_NOFS
);
1464 sbi
->upcase
= kvmalloc(0x10000 * sizeof(short), GFP_KERNEL
);
1468 ratelimit_state_init(&sbi
->msg_ratelimit
, DEFAULT_RATELIMIT_INTERVAL
,
1469 DEFAULT_RATELIMIT_BURST
);
1471 mutex_init(&sbi
->compress
.mtx_lznt
);
1472 #ifdef CONFIG_NTFS3_LZX_XPRESS
1473 mutex_init(&sbi
->compress
.mtx_xpress
);
1474 mutex_init(&sbi
->compress
.mtx_lzx
);
1477 fc
->s_fs_info
= sbi
;
1479 fc
->fs_private
= opts
;
1480 fc
->ops
= &ntfs_context_ops
;
1491 static struct file_system_type ntfs_fs_type
= {
1492 .owner
= THIS_MODULE
,
1494 .init_fs_context
= ntfs_init_fs_context
,
1495 .parameters
= ntfs_fs_parameters
,
1496 .kill_sb
= kill_block_super
,
1497 .fs_flags
= FS_REQUIRES_DEV
| FS_ALLOW_IDMAP
,
1501 static int __init
init_ntfs_fs(void)
1505 pr_info("ntfs3: Max link count %u\n", NTFS_LINK_MAX
);
1507 if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL
))
1508 pr_info("ntfs3: Enabled Linux POSIX ACLs support\n");
1509 if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER
))
1510 pr_notice("ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n");
1511 if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS
))
1512 pr_info("ntfs3: Read-only LZX/Xpress compression included\n");
1514 err
= ntfs3_init_bitmap();
1518 ntfs_inode_cachep
= kmem_cache_create(
1519 "ntfs_inode_cache", sizeof(struct ntfs_inode
), 0,
1520 (SLAB_RECLAIM_ACCOUNT
| SLAB_MEM_SPREAD
| SLAB_ACCOUNT
),
1522 if (!ntfs_inode_cachep
) {
1527 err
= register_filesystem(&ntfs_fs_type
);
1533 kmem_cache_destroy(ntfs_inode_cachep
);
1535 ntfs3_exit_bitmap();
1539 static void __exit
exit_ntfs_fs(void)
1542 kmem_cache_destroy(ntfs_inode_cachep
);
1543 unregister_filesystem(&ntfs_fs_type
);
1544 ntfs3_exit_bitmap();
1547 MODULE_LICENSE("GPL");
1548 MODULE_DESCRIPTION("ntfs3 read/write filesystem");
1549 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
1550 MODULE_INFO(behaviour
, "Enabled Linux POSIX ACLs support");
1552 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
1553 MODULE_INFO(cluster
, "Warning: Activated 64 bits per cluster. Windows does not support this");
1555 #ifdef CONFIG_NTFS3_LZX_XPRESS
1556 MODULE_INFO(compression
, "Read-only lzx/xpress compression included");
1559 MODULE_AUTHOR("Konstantin Komarov");
1560 MODULE_ALIAS_FS("ntfs3");
1562 module_init(init_ntfs_fs
);
1563 module_exit(exit_ntfs_fs
);