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 (2^21)
43 * -----------------------------------------------------------------------------
44 * | < 8P, 2^53 | < 2^32 | yes | yes | yes | yes | yes |
45 * | > 8P, 2^53 | > 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/proc_fs.h>
61 #include <linux/seq_file.h>
62 #include <linux/statfs.h>
67 #ifdef CONFIG_NTFS3_LZX_XPRESS
73 * ntfs_printk - Trace warnings/notices/errors.
77 void ntfs_printk(const struct super_block *sb, const char *fmt, ...)
82 struct ntfs_sb_info *sbi = sb->s_fs_info;
84 /* Should we use different ratelimits for warnings/notices/errors? */
85 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
90 level = printk_get_level(fmt);
91 vaf.fmt = printk_skip_level(fmt);
93 printk("%c%cntfs3(%s): %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf);
98 static char s_name_buf[512];
99 static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'.
104 * Print warnings/notices/errors about inode using name or inode number.
106 void ntfs_inode_printk(struct inode *inode, const char *fmt, ...)
108 struct super_block *sb = inode->i_sb;
109 struct ntfs_sb_info *sbi = sb->s_fs_info;
112 struct va_format vaf;
115 if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
118 /* Use static allocated buffer, if possible. */
119 name = atomic_dec_and_test(&s_name_buf_cnt) ?
121 kmalloc(sizeof(s_name_buf), GFP_NOFS);
124 struct dentry *de = d_find_alias(inode);
128 spin_lock(&de->d_lock);
129 len = snprintf(name, sizeof(s_name_buf), " \"%s\"",
131 spin_unlock(&de->d_lock);
134 else if (len >= sizeof(s_name_buf))
135 name[sizeof(s_name_buf) - 1] = 0;
139 dput(de); /* Cocci warns if placed in branch "if (de)" */
144 level = printk_get_level(fmt);
145 vaf.fmt = printk_skip_level(fmt);
148 printk("%c%cntfs3(%s): ino=%lx,%s %pV\n", KERN_SOH_ASCII, level,
149 sb->s_id, inode->i_ino, name ? name : "", &vaf);
153 atomic_inc(&s_name_buf_cnt);
154 if (name != s_name_buf)
160 * Shared memory struct.
162 * On-disk ntfs's upcase table is created by ntfs formatter.
163 * 'upcase' table is 128K bytes of memory.
164 * We should read it into memory when mounting.
165 * Several ntfs volumes likely use the same 'upcase' table.
166 * It is good idea to share in-memory 'upcase' table between different volumes.
167 * Unfortunately winxp/vista/win7 use different upcase tables.
169 static DEFINE_SPINLOCK(s_shared_lock);
181 * * @ptr - If pointer was saved in shared memory.
182 * * NULL - If pointer was not shared.
184 void *ntfs_set_shared(void *ptr, u32 bytes)
189 spin_lock(&s_shared_lock);
190 for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
191 if (!s_shared[i].cnt) {
193 } else if (bytes == s_shared[i].len &&
194 !memcmp(s_shared[i].ptr, ptr, bytes)) {
195 s_shared[i].cnt += 1;
196 ret = s_shared[i].ptr;
201 if (!ret && j != -1) {
202 s_shared[j].ptr = ptr;
203 s_shared[j].len = bytes;
207 spin_unlock(&s_shared_lock);
216 * * @ptr - If pointer is not shared anymore.
217 * * NULL - If pointer is still shared.
219 void *ntfs_put_shared(void *ptr)
224 spin_lock(&s_shared_lock);
225 for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
226 if (s_shared[i].cnt && s_shared[i].ptr == ptr) {
227 if (--s_shared[i].cnt)
232 spin_unlock(&s_shared_lock);
237 static inline void put_mount_options(struct ntfs_mount_options *options)
239 kfree(options->nls_name);
240 unload_nls(options->nls);
266 static const struct fs_parameter_spec ntfs_fs_parameters[] = {
267 fsparam_uid("uid", Opt_uid),
268 fsparam_gid("gid", Opt_gid),
269 fsparam_u32oct("umask", Opt_umask),
270 fsparam_u32oct("dmask", Opt_dmask),
271 fsparam_u32oct("fmask", Opt_fmask),
272 fsparam_flag("sys_immutable", Opt_immutable),
273 fsparam_flag("discard", Opt_discard),
274 fsparam_flag("force", Opt_force),
275 fsparam_flag("sparse", Opt_sparse),
276 fsparam_flag("nohidden", Opt_nohidden),
277 fsparam_flag("hide_dot_files", Opt_hide_dot_files),
278 fsparam_flag("windows_names", Opt_windows_names),
279 fsparam_flag("showmeta", Opt_showmeta),
280 fsparam_flag("acl", Opt_acl),
281 fsparam_string("iocharset", Opt_iocharset),
282 fsparam_flag("prealloc", Opt_prealloc),
283 fsparam_flag("nocase", Opt_nocase),
289 * Load nls table or if @nls is utf8 then return NULL.
291 * It is good idea to use here "const char *nls".
292 * But load_nls accepts "char*".
294 static struct nls_table *ntfs_load_nls(char *nls)
296 struct nls_table *ret;
299 nls = CONFIG_NLS_DEFAULT;
301 if (strcmp(nls, "utf8") == 0)
304 if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0)
305 return load_nls_default();
311 return ERR_PTR(-EINVAL);
314 static int ntfs_fs_parse_param(struct fs_context *fc,
315 struct fs_parameter *param)
317 struct ntfs_mount_options *opts = fc->fs_private;
318 struct fs_parse_result result;
321 opt = fs_parse(fc, ntfs_fs_parameters, param, &result);
327 opts->fs_uid = result.uid;
330 opts->fs_gid = result.gid;
333 if (result.uint_32 & ~07777)
334 return invalf(fc, "ntfs3: Invalid value for umask.");
335 opts->fs_fmask_inv = ~result.uint_32;
336 opts->fs_dmask_inv = ~result.uint_32;
341 if (result.uint_32 & ~07777)
342 return invalf(fc, "ntfs3: Invalid value for dmask.");
343 opts->fs_dmask_inv = ~result.uint_32;
347 if (result.uint_32 & ~07777)
348 return invalf(fc, "ntfs3: Invalid value for fmask.");
349 opts->fs_fmask_inv = ~result.uint_32;
353 opts->sys_immutable = 1;
367 case Opt_hide_dot_files:
368 opts->hide_dot_files = 1;
370 case Opt_windows_names:
371 opts->windows_names = 1;
378 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
379 fc->sb_flags |= SB_POSIXACL;
382 fc, "ntfs3: Support for ACL not compiled in!");
385 fc->sb_flags &= ~SB_POSIXACL;
388 kfree(opts->nls_name);
389 opts->nls_name = param->string;
390 param->string = NULL;
399 /* Should not be here unless we forget add case. */
405 static int ntfs_fs_reconfigure(struct fs_context *fc)
407 struct super_block *sb = fc->root->d_sb;
408 struct ntfs_sb_info *sbi = sb->s_fs_info;
409 struct ntfs_mount_options *new_opts = fc->fs_private;
412 /* If ntfs3 is used as legacy ntfs enforce read-only mode. */
413 if (is_legacy_ntfs(sb)) {
414 fc->sb_flags |= SB_RDONLY;
418 ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY);
419 if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) {
421 "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n");
425 new_opts->nls = ntfs_load_nls(new_opts->nls_name);
426 if (IS_ERR(new_opts->nls)) {
427 new_opts->nls = NULL;
428 errorf(fc, "ntfs3: Cannot load iocharset %s",
432 if (new_opts->nls != sbi->options->nls)
435 "ntfs3: Cannot use different iocharset when remounting!");
437 if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) &&
440 "ntfs3: Volume is dirty and \"force\" flag is not set!");
446 swap(sbi->options, fc->fs_private);
451 #ifdef CONFIG_PROC_FS
452 static struct proc_dir_entry *proc_info_root;
457 * The content of /proc/fs/ntfs3/<dev>/volinfo
462 * total number of mft records
463 * number of used mft records ~= number of files + folders
464 * real state of ntfs "dirty"/"clean"
465 * current state of ntfs "dirty"/"clean"
467 static int ntfs3_volinfo(struct seq_file *m, void *o)
469 struct super_block *sb = m->private;
470 struct ntfs_sb_info *sbi = sb->s_fs_info;
472 seq_printf(m, "ntfs%d.%d\n%u\n%zu\n%zu\n%zu\n%s\n%s\n",
473 sbi->volume.major_ver, sbi->volume.minor_ver,
474 sbi->cluster_size, sbi->used.bitmap.nbits,
475 sbi->mft.bitmap.nbits,
476 sbi->mft.bitmap.nbits - wnd_zeroes(&sbi->mft.bitmap),
477 sbi->volume.real_dirty ? "dirty" : "clean",
478 (sbi->volume.flags & VOLUME_FLAG_DIRTY) ? "dirty" : "clean");
483 static int ntfs3_volinfo_open(struct inode *inode, struct file *file)
485 return single_open(file, ntfs3_volinfo, pde_data(inode));
488 /* read /proc/fs/ntfs3/<dev>/label */
489 static int ntfs3_label_show(struct seq_file *m, void *o)
491 struct super_block *sb = m->private;
492 struct ntfs_sb_info *sbi = sb->s_fs_info;
494 seq_printf(m, "%s\n", sbi->volume.label);
499 /* write /proc/fs/ntfs3/<dev>/label */
500 static ssize_t ntfs3_label_write(struct file *file, const char __user *buffer,
501 size_t count, loff_t *ppos)
504 struct super_block *sb = pde_data(file_inode(file));
511 label = kmalloc(count, GFP_NOFS);
516 if (copy_from_user(label, buffer, ret)) {
520 while (ret > 0 && label[ret - 1] == '\n')
523 err = ntfs_set_label(sb->s_fs_info, label, ret);
526 ntfs_err(sb, "failed (%d) to write label", err);
538 static int ntfs3_label_open(struct inode *inode, struct file *file)
540 return single_open(file, ntfs3_label_show, pde_data(inode));
543 static const struct proc_ops ntfs3_volinfo_fops = {
544 .proc_read = seq_read,
545 .proc_lseek = seq_lseek,
546 .proc_release = single_release,
547 .proc_open = ntfs3_volinfo_open,
550 static const struct proc_ops ntfs3_label_fops = {
551 .proc_read = seq_read,
552 .proc_lseek = seq_lseek,
553 .proc_release = single_release,
554 .proc_open = ntfs3_label_open,
555 .proc_write = ntfs3_label_write,
560 static struct kmem_cache *ntfs_inode_cachep;
562 static struct inode *ntfs_alloc_inode(struct super_block *sb)
564 struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS);
569 memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode));
570 mutex_init(&ni->ni_lock);
571 return &ni->vfs_inode;
574 static void ntfs_free_inode(struct inode *inode)
576 struct ntfs_inode *ni = ntfs_i(inode);
578 mutex_destroy(&ni->ni_lock);
579 kmem_cache_free(ntfs_inode_cachep, ni);
582 static void init_once(void *foo)
584 struct ntfs_inode *ni = foo;
586 inode_init_once(&ni->vfs_inode);
590 * Noinline to reduce binary size.
592 static noinline void ntfs3_put_sbi(struct ntfs_sb_info *sbi)
594 wnd_close(&sbi->mft.bitmap);
595 wnd_close(&sbi->used.bitmap);
598 iput(&sbi->mft.ni->vfs_inode);
602 if (sbi->security.ni) {
603 iput(&sbi->security.ni->vfs_inode);
604 sbi->security.ni = NULL;
607 if (sbi->reparse.ni) {
608 iput(&sbi->reparse.ni->vfs_inode);
609 sbi->reparse.ni = NULL;
613 iput(&sbi->objid.ni->vfs_inode);
614 sbi->objid.ni = NULL;
617 if (sbi->volume.ni) {
618 iput(&sbi->volume.ni->vfs_inode);
619 sbi->volume.ni = NULL;
622 ntfs_update_mftmirr(sbi, 0);
624 indx_clear(&sbi->security.index_sii);
625 indx_clear(&sbi->security.index_sdh);
626 indx_clear(&sbi->reparse.index_r);
627 indx_clear(&sbi->objid.index_o);
630 static void ntfs3_free_sbi(struct ntfs_sb_info *sbi)
633 kvfree(ntfs_put_shared(sbi->upcase));
634 kvfree(sbi->def_table);
635 kfree(sbi->compress.lznt);
636 #ifdef CONFIG_NTFS3_LZX_XPRESS
637 xpress_free_decompressor(sbi->compress.xpress);
638 lzx_free_decompressor(sbi->compress.lzx);
643 static void ntfs_put_super(struct super_block *sb)
645 struct ntfs_sb_info *sbi = sb->s_fs_info;
647 #ifdef CONFIG_PROC_FS
648 // Remove /proc/fs/ntfs3/..
650 remove_proc_entry("label", sbi->procdir);
651 remove_proc_entry("volinfo", sbi->procdir);
652 remove_proc_entry(sb->s_id, proc_info_root);
657 /* Mark rw ntfs as clear, if possible. */
658 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
662 static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf)
664 struct super_block *sb = dentry->d_sb;
665 struct ntfs_sb_info *sbi = sb->s_fs_info;
666 struct wnd_bitmap *wnd = &sbi->used.bitmap;
668 buf->f_type = sb->s_magic;
669 buf->f_bsize = sbi->cluster_size;
670 buf->f_blocks = wnd->nbits;
672 buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd);
673 buf->f_fsid.val[0] = sbi->volume.ser_num;
674 buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32);
675 buf->f_namelen = NTFS_NAME_LEN;
680 static int ntfs_show_options(struct seq_file *m, struct dentry *root)
682 struct super_block *sb = root->d_sb;
683 struct ntfs_sb_info *sbi = sb->s_fs_info;
684 struct ntfs_mount_options *opts = sbi->options;
685 struct user_namespace *user_ns = seq_user_ns(m);
687 seq_printf(m, ",uid=%u", from_kuid_munged(user_ns, opts->fs_uid));
688 seq_printf(m, ",gid=%u", from_kgid_munged(user_ns, opts->fs_gid));
690 seq_printf(m, ",dmask=%04o", opts->fs_dmask_inv ^ 0xffff);
692 seq_printf(m, ",fmask=%04o", opts->fs_fmask_inv ^ 0xffff);
693 if (opts->sys_immutable)
694 seq_puts(m, ",sys_immutable");
696 seq_puts(m, ",discard");
698 seq_puts(m, ",force");
700 seq_puts(m, ",sparse");
702 seq_puts(m, ",nohidden");
703 if (opts->hide_dot_files)
704 seq_puts(m, ",hide_dot_files");
705 if (opts->windows_names)
706 seq_puts(m, ",windows_names");
708 seq_puts(m, ",showmeta");
709 if (sb->s_flags & SB_POSIXACL)
712 seq_printf(m, ",iocharset=%s", opts->nls->charset);
714 seq_puts(m, ",iocharset=utf8");
716 seq_puts(m, ",prealloc");
718 seq_puts(m, ",nocase");
724 * ntfs_shutdown - super_operations::shutdown
726 static void ntfs_shutdown(struct super_block *sb)
728 set_bit(NTFS_FLAGS_SHUTDOWN_BIT, &ntfs_sb(sb)->flags);
732 * ntfs_sync_fs - super_operations::sync_fs
734 static int ntfs_sync_fs(struct super_block *sb, int wait)
737 struct ntfs_sb_info *sbi = sb->s_fs_info;
738 struct ntfs_inode *ni;
741 if (unlikely(ntfs3_forced_shutdown(sb)))
744 ni = sbi->security.ni;
746 inode = &ni->vfs_inode;
747 err2 = _ni_write_inode(inode, wait);
754 inode = &ni->vfs_inode;
755 err2 = _ni_write_inode(inode, wait);
760 ni = sbi->reparse.ni;
762 inode = &ni->vfs_inode;
763 err2 = _ni_write_inode(inode, wait);
769 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
771 ntfs_update_mftmirr(sbi, wait);
776 static const struct super_operations ntfs_sops = {
777 .alloc_inode = ntfs_alloc_inode,
778 .free_inode = ntfs_free_inode,
779 .evict_inode = ntfs_evict_inode,
780 .put_super = ntfs_put_super,
781 .statfs = ntfs_statfs,
782 .show_options = ntfs_show_options,
783 .shutdown = ntfs_shutdown,
784 .sync_fs = ntfs_sync_fs,
785 .write_inode = ntfs3_write_inode,
788 static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino,
794 ref.low = cpu_to_le32(ino);
795 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
796 ref.high = cpu_to_le16(ino >> 32);
800 ref.seq = cpu_to_le16(generation);
802 inode = ntfs_iget5(sb, &ref, NULL);
803 if (!IS_ERR(inode) && is_bad_inode(inode)) {
805 inode = ERR_PTR(-ESTALE);
811 static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
812 int fh_len, int fh_type)
814 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
815 ntfs_export_get_inode);
818 static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid,
819 int fh_len, int fh_type)
821 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
822 ntfs_export_get_inode);
825 /* TODO: == ntfs_sync_inode */
826 static int ntfs_nfs_commit_metadata(struct inode *inode)
828 return _ni_write_inode(inode, 1);
831 static const struct export_operations ntfs_export_ops = {
832 .encode_fh = generic_encode_ino32_fh,
833 .fh_to_dentry = ntfs_fh_to_dentry,
834 .fh_to_parent = ntfs_fh_to_parent,
835 .get_parent = ntfs3_get_parent,
836 .commit_metadata = ntfs_nfs_commit_metadata,
840 * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb".
842 static u32 format_size_gb(const u64 bytes, u32 *mb)
844 /* Do simple right 30 bit shift of 64 bit value. */
845 u64 kbytes = bytes >> 10;
846 u32 kbytes32 = kbytes;
848 *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20;
852 return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12);
855 static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot)
857 if (boot->sectors_per_clusters <= 0x80)
858 return boot->sectors_per_clusters;
859 if (boot->sectors_per_clusters >= 0xf4) /* limit shift to 2MB max */
860 return 1U << (-(s8)boot->sectors_per_clusters);
865 * ntfs_init_from_boot - Init internal info from on-disk boot sector.
867 * NTFS mount begins from boot - special formatted 512 bytes.
868 * There are two boots: the first and the last 512 bytes of volume.
869 * The content of boot is not changed during ntfs life.
871 * NOTE: ntfs.sys checks only first (primary) boot.
872 * chkdsk checks both boots.
874 static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
875 u64 dev_size, struct NTFS_BOOT **boot2)
877 struct ntfs_sb_info *sbi = sb->s_fs_info;
879 u32 mb, gb, boot_sector_size, sct_per_clst, record_size;
880 u64 sectors, clusters, mlcn, mlcn2, dev_size0;
881 struct NTFS_BOOT *boot;
882 struct buffer_head *bh;
887 sector_t boot_block = 0;
888 const char *hint = "Primary boot";
890 /* Save original dev_size. Used with alternative boot. */
891 dev_size0 = dev_size;
893 sbi->volume.blocks = dev_size >> PAGE_SHIFT;
896 bh = ntfs_bread(sb, boot_block);
898 return boot_block ? -EINVAL : -EIO;
902 /* Corrupted image; do not read OOB */
903 if (bh->b_size - sizeof(*boot) < boot_off)
906 boot = (struct NTFS_BOOT *)Add2Ptr(bh->b_data, boot_off);
908 if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) {
909 ntfs_err(sb, "%s signature is not NTFS.", hint);
913 /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/
914 /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1])
918 boot_sector_size = ((u32)boot->bytes_per_sector[1] << 8) |
919 boot->bytes_per_sector[0];
920 if (boot_sector_size < SECTOR_SIZE ||
921 !is_power_of_2(boot_sector_size)) {
922 ntfs_err(sb, "%s: invalid bytes per sector %u.", hint,
927 /* cluster size: 512, 1K, 2K, 4K, ... 2M */
928 sct_per_clst = true_sectors_per_clst(boot);
929 if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) {
930 ntfs_err(sb, "%s: invalid sectors per cluster %u.", hint,
935 sbi->cluster_size = boot_sector_size * sct_per_clst;
936 sbi->cluster_bits = cluster_bits = blksize_bits(sbi->cluster_size);
937 sbi->cluster_mask = sbi->cluster_size - 1;
938 sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask;
940 mlcn = le64_to_cpu(boot->mft_clst);
941 mlcn2 = le64_to_cpu(boot->mft2_clst);
942 sectors = le64_to_cpu(boot->sectors_per_volume);
944 if (mlcn * sct_per_clst >= sectors || mlcn2 * sct_per_clst >= sectors) {
947 "%s: start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.",
948 hint, mlcn, mlcn2, sectors);
952 if (boot->record_size >= 0) {
953 record_size = (u32)boot->record_size << cluster_bits;
954 } else if (-boot->record_size <= MAXIMUM_SHIFT_BYTES_PER_MFT) {
955 record_size = 1u << (-boot->record_size);
957 ntfs_err(sb, "%s: invalid record size %d.", hint,
962 sbi->record_size = record_size;
963 sbi->record_bits = blksize_bits(record_size);
964 sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes
966 /* Check MFT record size. */
967 if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) {
968 ntfs_err(sb, "%s: invalid bytes per MFT record %u (%d).", hint,
969 record_size, boot->record_size);
973 if (record_size > MAXIMUM_BYTES_PER_MFT) {
974 ntfs_err(sb, "Unsupported bytes per MFT record %u.",
979 if (boot->index_size >= 0) {
980 sbi->index_size = (u32)boot->index_size << cluster_bits;
981 } else if (-boot->index_size <= MAXIMUM_SHIFT_BYTES_PER_INDEX) {
982 sbi->index_size = 1u << (-boot->index_size);
984 ntfs_err(sb, "%s: invalid index size %d.", hint,
989 /* Check index record size. */
990 if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) {
991 ntfs_err(sb, "%s: invalid bytes per index %u(%d).", hint,
992 sbi->index_size, boot->index_size);
996 if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) {
997 ntfs_err(sb, "%s: unsupported bytes per index %u.", hint,
1002 sbi->volume.size = sectors * boot_sector_size;
1004 gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb);
1007 * - Volume formatted and mounted with the same sector size.
1008 * - Volume formatted 4K and mounted as 512.
1009 * - Volume formatted 512 and mounted as 4K.
1011 if (boot_sector_size != sector_size) {
1014 "Different NTFS sector size (%u) and media sector size (%u).",
1015 boot_sector_size, sector_size);
1016 dev_size += sector_size - 1;
1019 sbi->mft.lbo = mlcn << cluster_bits;
1020 sbi->mft.lbo2 = mlcn2 << cluster_bits;
1022 /* Compare boot's cluster and sector. */
1023 if (sbi->cluster_size < boot_sector_size) {
1024 ntfs_err(sb, "%s: invalid bytes per cluster (%u).", hint,
1029 /* Compare boot's cluster and media sector. */
1030 if (sbi->cluster_size < sector_size) {
1031 /* No way to use ntfs_get_block in this case. */
1034 "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u).",
1035 sbi->cluster_size, sector_size);
1039 sbi->max_bytes_per_attr =
1040 record_size - ALIGN(MFTRECORD_FIXUP_OFFSET, 8) -
1041 ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) -
1042 ALIGN(sizeof(enum ATTR_TYPE), 8);
1044 sbi->volume.ser_num = le64_to_cpu(boot->serial_num);
1046 /* Warning if RAW volume. */
1047 if (dev_size < sbi->volume.size + boot_sector_size) {
1050 gb0 = format_size_gb(dev_size, &mb0);
1053 "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only.",
1055 sb->s_flags |= SB_RDONLY;
1058 clusters = sbi->volume.size >> cluster_bits;
1059 #ifndef CONFIG_NTFS3_64BIT_CLUSTER
1060 /* 32 bits per cluster. */
1061 if (clusters >> 32) {
1064 "NTFS %u.%02u Gb is too big to use 32 bits per cluster.",
1068 #elif BITS_PER_LONG < 64
1069 #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS"
1072 sbi->used.bitmap.nbits = clusters;
1074 rec = kzalloc(record_size, GFP_NOFS);
1081 rec->rhdr.sign = NTFS_FILE_SIGNATURE;
1082 rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET);
1083 fn = (sbi->record_size >> SECTOR_SHIFT) + 1;
1084 rec->rhdr.fix_num = cpu_to_le16(fn);
1085 ao = ALIGN(MFTRECORD_FIXUP_OFFSET + sizeof(short) * fn, 8);
1086 rec->attr_off = cpu_to_le16(ao);
1087 rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8));
1088 rec->total = cpu_to_le32(sbi->record_size);
1089 ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END;
1091 sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE));
1093 sbi->block_mask = sb->s_blocksize - 1;
1094 sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits;
1095 sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits;
1097 /* Maximum size for normal files. */
1098 sbi->maxbytes = (clusters << cluster_bits) - 1;
1100 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
1101 if (clusters >= (1ull << (64 - cluster_bits)))
1103 sbi->maxbytes_sparse = -1;
1104 sb->s_maxbytes = MAX_LFS_FILESIZE;
1106 /* Maximum size for sparse file. */
1107 sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1;
1108 sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits;
1112 * Compute the MFT zone at two steps.
1113 * It would be nice if we are able to allocate 1/8 of
1114 * total clusters for MFT but not more then 512 MB.
1116 sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3);
1120 if (bh->b_blocknr && !sb_rdonly(sb)) {
1122 * Alternative boot is ok but primary is not ok.
1123 * Do not update primary boot here 'cause it may be faked boot.
1124 * Let ntfs to be mounted and update boot later.
1126 *boot2 = kmemdup(boot, sizeof(*boot), GFP_NOFS | __GFP_NOWARN);
1132 if (err == -EINVAL && !boot_block && dev_size0 > PAGE_SHIFT) {
1133 u32 block_size = min_t(u32, sector_size, PAGE_SIZE);
1134 u64 lbo = dev_size0 - sizeof(*boot);
1136 boot_block = lbo >> blksize_bits(block_size);
1137 boot_off = lbo & (block_size - 1);
1138 if (boot_block && block_size >= boot_off + sizeof(*boot)) {
1140 * Try alternative boot (last sector)
1142 sb_set_blocksize(sb, block_size);
1143 hint = "Alternative boot";
1144 dev_size = dev_size0; /* restore original size. */
1153 * ntfs_fill_super - Try to mount.
1155 static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
1158 struct ntfs_sb_info *sbi = sb->s_fs_info;
1159 struct block_device *bdev = sb->s_bdev;
1160 struct ntfs_mount_options *options;
1161 struct inode *inode;
1162 struct ntfs_inode *ni;
1163 size_t i, tt, bad_len, bad_frags;
1165 struct ATTRIB *attr;
1166 const struct VOLUME_INFO *info;
1168 struct ATTR_DEF_ENTRY *t;
1171 bool ro = sb_rdonly(sb);
1172 struct NTFS_BOOT *boot2 = NULL;
1177 sbi->options = options = fc->fs_private;
1178 fc->fs_private = NULL;
1179 sb->s_flags |= SB_NODIRATIME;
1180 sb->s_magic = 0x7366746e; // "ntfs"
1181 sb->s_op = &ntfs_sops;
1182 sb->s_export_op = &ntfs_export_ops;
1183 sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec
1184 sb->s_xattr = ntfs_xattr_handlers;
1185 sb->s_d_op = options->nocase ? &ntfs_dentry_ops : NULL;
1187 options->nls = ntfs_load_nls(options->nls_name);
1188 if (IS_ERR(options->nls)) {
1189 options->nls = NULL;
1190 errorf(fc, "Cannot load nls %s", options->nls_name);
1195 if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) {
1196 sbi->discard_granularity = bdev_discard_granularity(bdev);
1197 sbi->discard_granularity_mask_inv =
1198 ~(u64)(sbi->discard_granularity - 1);
1202 err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev),
1203 bdev_nr_bytes(bdev), &boot2);
1208 * Load $Volume. This should be done before $LogFile
1209 * 'cause 'sbi->volume.ni' is used in 'ntfs_set_state'.
1211 ref.low = cpu_to_le32(MFT_REC_VOL);
1212 ref.seq = cpu_to_le16(MFT_REC_VOL);
1213 inode = ntfs_iget5(sb, &ref, &NAME_VOLUME);
1214 if (IS_ERR(inode)) {
1215 err = PTR_ERR(inode);
1216 ntfs_err(sb, "Failed to load $Volume (%d).", err);
1222 /* Load and save label (not necessary). */
1223 attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL);
1226 /* It is ok if no ATTR_LABEL */
1227 } else if (!attr->non_res && !is_attr_ext(attr)) {
1228 /* $AttrDef allows labels to be up to 128 symbols. */
1229 err = utf16s_to_utf8s(resident_data(attr),
1230 le32_to_cpu(attr->res.data_size) >> 1,
1231 UTF16_LITTLE_ENDIAN, sbi->volume.label,
1232 sizeof(sbi->volume.label));
1234 sbi->volume.label[0] = 0;
1236 /* Should we break mounting here? */
1238 //goto put_inode_out;
1241 attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL);
1242 if (!attr || is_attr_ext(attr) ||
1243 !(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) {
1244 ntfs_err(sb, "$Volume is corrupted.");
1249 sbi->volume.major_ver = info->major_ver;
1250 sbi->volume.minor_ver = info->minor_ver;
1251 sbi->volume.flags = info->flags;
1252 sbi->volume.ni = ni;
1253 if (info->flags & VOLUME_FLAG_DIRTY) {
1254 sbi->volume.real_dirty = true;
1255 ntfs_info(sb, "It is recommened to use chkdsk.");
1258 /* Load $MFTMirr to estimate recs_mirr. */
1259 ref.low = cpu_to_le32(MFT_REC_MIRR);
1260 ref.seq = cpu_to_le16(MFT_REC_MIRR);
1261 inode = ntfs_iget5(sb, &ref, &NAME_MIRROR);
1262 if (IS_ERR(inode)) {
1263 err = PTR_ERR(inode);
1264 ntfs_err(sb, "Failed to load $MFTMirr (%d).", err);
1268 sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >>
1273 /* Load LogFile to replay. */
1274 ref.low = cpu_to_le32(MFT_REC_LOG);
1275 ref.seq = cpu_to_le16(MFT_REC_LOG);
1276 inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE);
1277 if (IS_ERR(inode)) {
1278 err = PTR_ERR(inode);
1279 ntfs_err(sb, "Failed to load \x24LogFile (%d).", err);
1285 err = ntfs_loadlog_and_replay(ni, sbi);
1291 if ((sbi->flags & NTFS_FLAGS_NEED_REPLAY) && !ro) {
1292 ntfs_warn(sb, "failed to replay log file. Can't mount rw!");
1297 if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !options->force) {
1298 ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!");
1304 ref.low = cpu_to_le32(MFT_REC_MFT);
1305 ref.seq = cpu_to_le16(1);
1307 inode = ntfs_iget5(sb, &ref, &NAME_MFT);
1308 if (IS_ERR(inode)) {
1309 err = PTR_ERR(inode);
1310 ntfs_err(sb, "Failed to load $MFT (%d).", err);
1316 sbi->mft.used = ni->i_valid >> sbi->record_bits;
1317 tt = inode->i_size >> sbi->record_bits;
1318 sbi->mft.next_free = MFT_REC_USER;
1320 err = wnd_init(&sbi->mft.bitmap, sb, tt);
1324 err = ni_load_all_mi(ni);
1326 ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err);
1333 ref.low = cpu_to_le32(MFT_REC_BITMAP);
1334 ref.seq = cpu_to_le16(MFT_REC_BITMAP);
1335 inode = ntfs_iget5(sb, &ref, &NAME_BITMAP);
1336 if (IS_ERR(inode)) {
1337 err = PTR_ERR(inode);
1338 ntfs_err(sb, "Failed to load $Bitmap (%d).", err);
1342 #ifndef CONFIG_NTFS3_64BIT_CLUSTER
1343 if (inode->i_size >> 32) {
1349 /* Check bitmap boundary. */
1350 tt = sbi->used.bitmap.nbits;
1351 if (inode->i_size < ntfs3_bitmap_size(tt)) {
1352 ntfs_err(sb, "$Bitmap is corrupted.");
1357 err = wnd_init(&sbi->used.bitmap, sb, tt);
1359 ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err);
1365 /* Compute the MFT zone. */
1366 err = ntfs_refresh_zone(sbi);
1368 ntfs_err(sb, "Failed to initialize MFT zone (%d).", err);
1372 /* Load $BadClus. */
1373 ref.low = cpu_to_le32(MFT_REC_BADCLUST);
1374 ref.seq = cpu_to_le16(MFT_REC_BADCLUST);
1375 inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS);
1376 if (IS_ERR(inode)) {
1377 err = PTR_ERR(inode);
1378 ntfs_err(sb, "Failed to load $BadClus (%d).", err);
1383 bad_len = bad_frags = 0;
1384 for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) {
1385 if (lcn == SPARSE_LCN)
1393 if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) {
1394 /* Bad blocks marked as free in bitmap. */
1395 ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
1400 * Notice about bad blocks.
1401 * In normal cases these blocks are marked as used in bitmap.
1402 * And we never allocate space in it.
1405 "Volume contains %zu bad blocks in %zu fragments.",
1406 bad_len, bad_frags);
1410 /* Load $AttrDef. */
1411 ref.low = cpu_to_le32(MFT_REC_ATTR);
1412 ref.seq = cpu_to_le16(MFT_REC_ATTR);
1413 inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF);
1414 if (IS_ERR(inode)) {
1415 err = PTR_ERR(inode);
1416 ntfs_err(sb, "Failed to load $AttrDef (%d)", err);
1421 * Typical $AttrDef contains up to 20 entries.
1422 * Check for extremely large/small size.
1424 if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) ||
1425 inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) {
1426 ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).",
1432 bytes = inode->i_size;
1433 sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL);
1439 /* Read the entire file. */
1440 err = inode_read_data(inode, sbi->def_table, bytes);
1442 ntfs_err(sb, "Failed to read $AttrDef (%d).", err);
1446 if (ATTR_STD != t->type) {
1447 ntfs_err(sb, "$AttrDef is corrupted.");
1453 sbi->def_entries = 1;
1454 done = sizeof(struct ATTR_DEF_ENTRY);
1456 while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) {
1457 u32 t32 = le32_to_cpu(t->type);
1458 u64 sz = le64_to_cpu(t->max_sz);
1460 if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32)
1463 if (t->type == ATTR_REPARSE)
1464 sbi->reparse.max_size = sz;
1465 else if (t->type == ATTR_EA)
1466 sbi->ea_max_size = sz;
1468 done += sizeof(struct ATTR_DEF_ENTRY);
1470 sbi->def_entries += 1;
1475 ref.low = cpu_to_le32(MFT_REC_UPCASE);
1476 ref.seq = cpu_to_le16(MFT_REC_UPCASE);
1477 inode = ntfs_iget5(sb, &ref, &NAME_UPCASE);
1478 if (IS_ERR(inode)) {
1479 err = PTR_ERR(inode);
1480 ntfs_err(sb, "Failed to load $UpCase (%d).", err);
1484 if (inode->i_size != 0x10000 * sizeof(short)) {
1486 ntfs_err(sb, "$UpCase is corrupted.");
1490 /* Read the entire file. */
1491 err = inode_read_data(inode, sbi->upcase, 0x10000 * sizeof(short));
1493 ntfs_err(sb, "Failed to read $UpCase (%d).", err);
1499 u16 *dst = sbi->upcase;
1501 for (i = 0; i < 0x10000; i++)
1506 shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short));
1507 if (shared && sbi->upcase != shared) {
1508 kvfree(sbi->upcase);
1509 sbi->upcase = shared;
1514 if (is_ntfs3(sbi)) {
1516 err = ntfs_security_init(sbi);
1518 ntfs_err(sb, "Failed to initialize $Secure (%d).", err);
1523 err = ntfs_extend_init(sbi);
1525 ntfs_warn(sb, "Failed to initialize $Extend.");
1529 /* Load $Extend/$Reparse. */
1530 err = ntfs_reparse_init(sbi);
1532 ntfs_warn(sb, "Failed to initialize $Extend/$Reparse.");
1536 /* Load $Extend/$ObjId. */
1537 err = ntfs_objid_init(sbi);
1539 ntfs_warn(sb, "Failed to initialize $Extend/$ObjId.");
1546 ref.low = cpu_to_le32(MFT_REC_ROOT);
1547 ref.seq = cpu_to_le16(MFT_REC_ROOT);
1548 inode = ntfs_iget5(sb, &ref, &NAME_ROOT);
1549 if (IS_ERR(inode)) {
1550 err = PTR_ERR(inode);
1551 ntfs_err(sb, "Failed to load root (%d).", err);
1556 * Final check. Looks like this case should never occurs.
1560 ntfs_err(sb, "Failed to load root (%d).", err);
1564 sb->s_root = d_make_root(inode);
1572 * Alternative boot is ok but primary is not ok.
1573 * Volume is recognized as NTFS. Update primary boot.
1575 struct buffer_head *bh0 = sb_getblk(sb, 0);
1577 if (buffer_locked(bh0))
1578 __wait_on_buffer(bh0);
1581 memcpy(bh0->b_data, boot2, sizeof(*boot2));
1582 set_buffer_uptodate(bh0);
1583 mark_buffer_dirty(bh0);
1585 if (!sync_dirty_buffer(bh0))
1586 ntfs_warn(sb, "primary boot is updated");
1593 #ifdef CONFIG_PROC_FS
1594 /* Create /proc/fs/ntfs3/.. */
1595 if (proc_info_root) {
1596 struct proc_dir_entry *e = proc_mkdir(sb->s_id, proc_info_root);
1597 static_assert((S_IRUGO | S_IWUSR) == 0644);
1599 proc_create_data("volinfo", S_IRUGO, e,
1600 &ntfs3_volinfo_fops, sb);
1601 proc_create_data("label", S_IRUGO | S_IWUSR, e,
1602 &ntfs3_label_fops, sb);
1608 if (is_legacy_ntfs(sb))
1609 sb->s_flags |= SB_RDONLY;
1621 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len)
1623 struct ntfs_sb_info *sbi = sb->s_fs_info;
1624 struct block_device *bdev = sb->s_bdev;
1625 sector_t devblock = (u64)lcn * sbi->blocks_per_cluster;
1626 unsigned long blocks = (u64)len * sbi->blocks_per_cluster;
1627 unsigned long cnt = 0;
1628 unsigned long limit = global_zone_page_state(NR_FREE_PAGES)
1629 << (PAGE_SHIFT - sb->s_blocksize_bits);
1631 if (limit >= 0x2000)
1633 else if (limit < 32)
1639 clean_bdev_aliases(bdev, devblock++, 1);
1640 if (cnt++ >= limit) {
1641 sync_blockdev(bdev);
1648 * ntfs_discard - Issue a discard request (trim for SSD).
1650 int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len)
1653 u64 lbo, bytes, start, end;
1654 struct super_block *sb;
1656 if (sbi->used.next_free_lcn == lcn + len)
1657 sbi->used.next_free_lcn = lcn;
1659 if (sbi->flags & NTFS_FLAGS_NODISCARD)
1662 if (!sbi->options->discard)
1665 lbo = (u64)lcn << sbi->cluster_bits;
1666 bytes = (u64)len << sbi->cluster_bits;
1668 /* Align up 'start' on discard_granularity. */
1669 start = (lbo + sbi->discard_granularity - 1) &
1670 sbi->discard_granularity_mask_inv;
1671 /* Align down 'end' on discard_granularity. */
1672 end = (lbo + bytes) & sbi->discard_granularity_mask_inv;
1678 err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9,
1681 if (err == -EOPNOTSUPP)
1682 sbi->flags |= NTFS_FLAGS_NODISCARD;
1687 static int ntfs_fs_get_tree(struct fs_context *fc)
1689 return get_tree_bdev(fc, ntfs_fill_super);
1693 * ntfs_fs_free - Free fs_context.
1695 * Note that this will be called after fill_super and reconfigure
1696 * even when they pass. So they have to take pointers if they pass.
1698 static void ntfs_fs_free(struct fs_context *fc)
1700 struct ntfs_mount_options *opts = fc->fs_private;
1701 struct ntfs_sb_info *sbi = fc->s_fs_info;
1705 ntfs3_free_sbi(sbi);
1709 put_mount_options(opts);
1713 static const struct fs_context_operations ntfs_context_ops = {
1714 .parse_param = ntfs_fs_parse_param,
1715 .get_tree = ntfs_fs_get_tree,
1716 .reconfigure = ntfs_fs_reconfigure,
1717 .free = ntfs_fs_free,
1722 * ntfs_init_fs_context - Initialize sbi and opts
1724 * This will called when mount/remount. We will first initialize
1725 * options so that if remount we can use just that.
1727 static int __ntfs_init_fs_context(struct fs_context *fc)
1729 struct ntfs_mount_options *opts;
1730 struct ntfs_sb_info *sbi;
1732 opts = kzalloc(sizeof(struct ntfs_mount_options), GFP_NOFS);
1736 /* Default options. */
1737 opts->fs_uid = current_uid();
1738 opts->fs_gid = current_gid();
1739 opts->fs_fmask_inv = ~current_umask();
1740 opts->fs_dmask_inv = ~current_umask();
1742 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE)
1745 sbi = kzalloc(sizeof(struct ntfs_sb_info), GFP_NOFS);
1749 sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL);
1753 ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL,
1754 DEFAULT_RATELIMIT_BURST);
1756 mutex_init(&sbi->compress.mtx_lznt);
1757 #ifdef CONFIG_NTFS3_LZX_XPRESS
1758 mutex_init(&sbi->compress.mtx_xpress);
1759 mutex_init(&sbi->compress.mtx_lzx);
1762 fc->s_fs_info = sbi;
1764 fc->fs_private = opts;
1765 fc->ops = &ntfs_context_ops;
1775 static int ntfs_init_fs_context(struct fs_context *fc)
1777 return __ntfs_init_fs_context(fc);
1780 static void ntfs3_kill_sb(struct super_block *sb)
1782 struct ntfs_sb_info *sbi = sb->s_fs_info;
1784 kill_block_super(sb);
1787 put_mount_options(sbi->options);
1788 ntfs3_free_sbi(sbi);
1792 static struct file_system_type ntfs_fs_type = {
1793 .owner = THIS_MODULE,
1795 .init_fs_context = ntfs_init_fs_context,
1796 .parameters = ntfs_fs_parameters,
1797 .kill_sb = ntfs3_kill_sb,
1798 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
1801 #if IS_ENABLED(CONFIG_NTFS_FS)
1802 static int ntfs_legacy_init_fs_context(struct fs_context *fc)
1806 ret = __ntfs_init_fs_context(fc);
1807 /* If ntfs3 is used as legacy ntfs enforce read-only mode. */
1808 fc->sb_flags |= SB_RDONLY;
1812 static struct file_system_type ntfs_legacy_fs_type = {
1813 .owner = THIS_MODULE,
1815 .init_fs_context = ntfs_legacy_init_fs_context,
1816 .parameters = ntfs_fs_parameters,
1817 .kill_sb = ntfs3_kill_sb,
1818 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
1820 MODULE_ALIAS_FS("ntfs");
1822 static inline void register_as_ntfs_legacy(void)
1824 int err = register_filesystem(&ntfs_legacy_fs_type);
1826 pr_warn("ntfs3: Failed to register legacy ntfs filesystem driver: %d\n", err);
1829 static inline void unregister_as_ntfs_legacy(void)
1831 unregister_filesystem(&ntfs_legacy_fs_type);
1833 bool is_legacy_ntfs(struct super_block *sb)
1835 return sb->s_type == &ntfs_legacy_fs_type;
1838 static inline void register_as_ntfs_legacy(void) {}
1839 static inline void unregister_as_ntfs_legacy(void) {}
1844 static int __init init_ntfs_fs(void)
1848 if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL))
1849 pr_info("ntfs3: Enabled Linux POSIX ACLs support\n");
1850 if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER))
1852 "ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n");
1853 if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS))
1854 pr_info("ntfs3: Read-only LZX/Xpress compression included\n");
1856 #ifdef CONFIG_PROC_FS
1857 /* Create "/proc/fs/ntfs3" */
1858 proc_info_root = proc_mkdir("fs/ntfs3", NULL);
1861 err = ntfs3_init_bitmap();
1865 ntfs_inode_cachep = kmem_cache_create(
1866 "ntfs_inode_cache", sizeof(struct ntfs_inode), 0,
1867 (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), init_once);
1868 if (!ntfs_inode_cachep) {
1873 register_as_ntfs_legacy();
1874 err = register_filesystem(&ntfs_fs_type);
1880 kmem_cache_destroy(ntfs_inode_cachep);
1882 ntfs3_exit_bitmap();
1886 static void __exit exit_ntfs_fs(void)
1889 kmem_cache_destroy(ntfs_inode_cachep);
1890 unregister_filesystem(&ntfs_fs_type);
1891 unregister_as_ntfs_legacy();
1892 ntfs3_exit_bitmap();
1894 #ifdef CONFIG_PROC_FS
1896 remove_proc_entry("fs/ntfs3", NULL);
1900 MODULE_LICENSE("GPL");
1901 MODULE_DESCRIPTION("ntfs3 read/write filesystem");
1902 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
1903 MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support");
1905 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
1908 "Warning: Activated 64 bits per cluster. Windows does not support this");
1910 #ifdef CONFIG_NTFS3_LZX_XPRESS
1911 MODULE_INFO(compression, "Read-only lzx/xpress compression included");
1914 MODULE_AUTHOR("Konstantin Komarov");
1915 MODULE_ALIAS_FS("ntfs3");
1917 module_init(init_ntfs_fs);
1918 module_exit(exit_ntfs_fs);