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);
125 const u32 name_len = ARRAY_SIZE(s_name_buf) - 1;
128 spin_lock(&de->d_lock);
129 snprintf(name, name_len, " \"%s\"", de->d_name.name);
130 spin_unlock(&de->d_lock);
131 name[name_len] = 0; /* To be sure. */
135 dput(de); /* Cocci warns if placed in branch "if (de)" */
140 level = printk_get_level(fmt);
141 vaf.fmt = printk_skip_level(fmt);
144 printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level,
145 sb->s_id, inode->i_ino, name ? name : "", &vaf);
149 atomic_inc(&s_name_buf_cnt);
150 if (name != s_name_buf)
156 * Shared memory struct.
158 * On-disk ntfs's upcase table is created by ntfs formatter.
159 * 'upcase' table is 128K bytes of memory.
160 * We should read it into memory when mounting.
161 * Several ntfs volumes likely use the same 'upcase' table.
162 * It is good idea to share in-memory 'upcase' table between different volumes.
163 * Unfortunately winxp/vista/win7 use different upcase tables.
165 static DEFINE_SPINLOCK(s_shared_lock);
177 * * @ptr - If pointer was saved in shared memory.
178 * * NULL - If pointer was not shared.
180 void *ntfs_set_shared(void *ptr, u32 bytes)
185 spin_lock(&s_shared_lock);
186 for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
187 if (!s_shared[i].cnt) {
189 } else if (bytes == s_shared[i].len &&
190 !memcmp(s_shared[i].ptr, ptr, bytes)) {
191 s_shared[i].cnt += 1;
192 ret = s_shared[i].ptr;
197 if (!ret && j != -1) {
198 s_shared[j].ptr = ptr;
199 s_shared[j].len = bytes;
203 spin_unlock(&s_shared_lock);
212 * * @ptr - If pointer is not shared anymore.
213 * * NULL - If pointer is still shared.
215 void *ntfs_put_shared(void *ptr)
220 spin_lock(&s_shared_lock);
221 for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
222 if (s_shared[i].cnt && s_shared[i].ptr == ptr) {
223 if (--s_shared[i].cnt)
228 spin_unlock(&s_shared_lock);
233 static inline void put_mount_options(struct ntfs_mount_options *options)
235 kfree(options->nls_name);
236 unload_nls(options->nls);
262 static const struct fs_parameter_spec ntfs_fs_parameters[] = {
263 fsparam_u32("uid", Opt_uid),
264 fsparam_u32("gid", Opt_gid),
265 fsparam_u32oct("umask", Opt_umask),
266 fsparam_u32oct("dmask", Opt_dmask),
267 fsparam_u32oct("fmask", Opt_fmask),
268 fsparam_flag_no("sys_immutable", Opt_immutable),
269 fsparam_flag_no("discard", Opt_discard),
270 fsparam_flag_no("force", Opt_force),
271 fsparam_flag_no("sparse", Opt_sparse),
272 fsparam_flag_no("hidden", Opt_nohidden),
273 fsparam_flag_no("hide_dot_files", Opt_hide_dot_files),
274 fsparam_flag_no("windows_names", Opt_windows_names),
275 fsparam_flag_no("showmeta", Opt_showmeta),
276 fsparam_flag_no("acl", Opt_acl),
277 fsparam_string("iocharset", Opt_iocharset),
278 fsparam_flag_no("prealloc", Opt_prealloc),
279 fsparam_flag_no("nocase", Opt_nocase),
285 * Load nls table or if @nls is utf8 then return NULL.
287 * It is good idea to use here "const char *nls".
288 * But load_nls accepts "char*".
290 static struct nls_table *ntfs_load_nls(char *nls)
292 struct nls_table *ret;
295 nls = CONFIG_NLS_DEFAULT;
297 if (strcmp(nls, "utf8") == 0)
300 if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0)
301 return load_nls_default();
307 return ERR_PTR(-EINVAL);
310 static int ntfs_fs_parse_param(struct fs_context *fc,
311 struct fs_parameter *param)
313 struct ntfs_mount_options *opts = fc->fs_private;
314 struct fs_parse_result result;
317 opt = fs_parse(fc, ntfs_fs_parameters, param, &result);
323 opts->fs_uid = make_kuid(current_user_ns(), result.uint_32);
324 if (!uid_valid(opts->fs_uid))
325 return invalf(fc, "ntfs3: Invalid value for uid.");
328 opts->fs_gid = make_kgid(current_user_ns(), result.uint_32);
329 if (!gid_valid(opts->fs_gid))
330 return invalf(fc, "ntfs3: Invalid value for 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 = result.negated ? 0 : 1;
356 opts->discard = result.negated ? 0 : 1;
359 opts->force = result.negated ? 0 : 1;
362 opts->sparse = result.negated ? 0 : 1;
365 opts->nohidden = result.negated ? 1 : 0;
367 case Opt_hide_dot_files:
368 opts->hide_dot_files = result.negated ? 0 : 1;
370 case Opt_windows_names:
371 opts->windows_names = result.negated ? 0 : 1;
374 opts->showmeta = result.negated ? 0 : 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;
393 opts->prealloc = result.negated ? 0 : 1;
396 opts->nocase = result.negated ? 1 : 0;
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 ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY);
413 if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) {
415 "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n");
419 new_opts->nls = ntfs_load_nls(new_opts->nls_name);
420 if (IS_ERR(new_opts->nls)) {
421 new_opts->nls = NULL;
422 errorf(fc, "ntfs3: Cannot load iocharset %s",
426 if (new_opts->nls != sbi->options->nls)
429 "ntfs3: Cannot use different iocharset when remounting!");
433 if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) &&
436 "ntfs3: Volume is dirty and \"force\" flag is not set!");
440 swap(sbi->options, fc->fs_private);
445 #ifdef CONFIG_PROC_FS
446 static struct proc_dir_entry *proc_info_root;
451 * The content of /proc/fs/ntfs3/<dev>/volinfo
456 * total number of mft records
457 * number of used mft records ~= number of files + folders
458 * real state of ntfs "dirty"/"clean"
459 * current state of ntfs "dirty"/"clean"
461 static int ntfs3_volinfo(struct seq_file *m, void *o)
463 struct super_block *sb = m->private;
464 struct ntfs_sb_info *sbi = sb->s_fs_info;
466 seq_printf(m, "ntfs%d.%d\n%u\n%zu\n\%zu\n%zu\n%s\n%s\n",
467 sbi->volume.major_ver, sbi->volume.minor_ver,
468 sbi->cluster_size, sbi->used.bitmap.nbits,
469 sbi->mft.bitmap.nbits,
470 sbi->mft.bitmap.nbits - wnd_zeroes(&sbi->mft.bitmap),
471 sbi->volume.real_dirty ? "dirty" : "clean",
472 (sbi->volume.flags & VOLUME_FLAG_DIRTY) ? "dirty" : "clean");
477 static int ntfs3_volinfo_open(struct inode *inode, struct file *file)
479 return single_open(file, ntfs3_volinfo, pde_data(inode));
482 /* read /proc/fs/ntfs3/<dev>/label */
483 static int ntfs3_label_show(struct seq_file *m, void *o)
485 struct super_block *sb = m->private;
486 struct ntfs_sb_info *sbi = sb->s_fs_info;
488 seq_printf(m, "%s\n", sbi->volume.label);
493 /* write /proc/fs/ntfs3/<dev>/label */
494 static ssize_t ntfs3_label_write(struct file *file, const char __user *buffer,
495 size_t count, loff_t *ppos)
498 struct super_block *sb = pde_data(file_inode(file));
505 label = kmalloc(count, GFP_NOFS);
510 if (copy_from_user(label, buffer, ret)) {
514 while (ret > 0 && label[ret - 1] == '\n')
517 err = ntfs_set_label(sb->s_fs_info, label, ret);
520 ntfs_err(sb, "failed (%d) to write label", err);
532 static int ntfs3_label_open(struct inode *inode, struct file *file)
534 return single_open(file, ntfs3_label_show, pde_data(inode));
537 static const struct proc_ops ntfs3_volinfo_fops = {
538 .proc_read = seq_read,
539 .proc_lseek = seq_lseek,
540 .proc_release = single_release,
541 .proc_open = ntfs3_volinfo_open,
544 static const struct proc_ops ntfs3_label_fops = {
545 .proc_read = seq_read,
546 .proc_lseek = seq_lseek,
547 .proc_release = single_release,
548 .proc_open = ntfs3_label_open,
549 .proc_write = ntfs3_label_write,
554 static struct kmem_cache *ntfs_inode_cachep;
556 static struct inode *ntfs_alloc_inode(struct super_block *sb)
558 struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS);
563 memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode));
564 mutex_init(&ni->ni_lock);
565 return &ni->vfs_inode;
568 static void ntfs_free_inode(struct inode *inode)
570 struct ntfs_inode *ni = ntfs_i(inode);
572 mutex_destroy(&ni->ni_lock);
573 kmem_cache_free(ntfs_inode_cachep, ni);
576 static void init_once(void *foo)
578 struct ntfs_inode *ni = foo;
580 inode_init_once(&ni->vfs_inode);
584 * Noinline to reduce binary size.
586 static noinline void ntfs3_put_sbi(struct ntfs_sb_info *sbi)
588 wnd_close(&sbi->mft.bitmap);
589 wnd_close(&sbi->used.bitmap);
592 iput(&sbi->mft.ni->vfs_inode);
596 if (sbi->security.ni) {
597 iput(&sbi->security.ni->vfs_inode);
598 sbi->security.ni = NULL;
601 if (sbi->reparse.ni) {
602 iput(&sbi->reparse.ni->vfs_inode);
603 sbi->reparse.ni = NULL;
607 iput(&sbi->objid.ni->vfs_inode);
608 sbi->objid.ni = NULL;
611 if (sbi->volume.ni) {
612 iput(&sbi->volume.ni->vfs_inode);
613 sbi->volume.ni = NULL;
616 ntfs_update_mftmirr(sbi, 0);
618 indx_clear(&sbi->security.index_sii);
619 indx_clear(&sbi->security.index_sdh);
620 indx_clear(&sbi->reparse.index_r);
621 indx_clear(&sbi->objid.index_o);
624 static void ntfs3_free_sbi(struct ntfs_sb_info *sbi)
627 kvfree(ntfs_put_shared(sbi->upcase));
628 kfree(sbi->def_table);
629 kfree(sbi->compress.lznt);
630 #ifdef CONFIG_NTFS3_LZX_XPRESS
631 xpress_free_decompressor(sbi->compress.xpress);
632 lzx_free_decompressor(sbi->compress.lzx);
637 static void ntfs_put_super(struct super_block *sb)
639 struct ntfs_sb_info *sbi = sb->s_fs_info;
641 #ifdef CONFIG_PROC_FS
642 // Remove /proc/fs/ntfs3/..
644 remove_proc_entry("label", sbi->procdir);
645 remove_proc_entry("volinfo", sbi->procdir);
646 remove_proc_entry(sb->s_id, proc_info_root);
651 /* Mark rw ntfs as clear, if possible. */
652 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
656 static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf)
658 struct super_block *sb = dentry->d_sb;
659 struct ntfs_sb_info *sbi = sb->s_fs_info;
660 struct wnd_bitmap *wnd = &sbi->used.bitmap;
662 buf->f_type = sb->s_magic;
663 buf->f_bsize = sbi->cluster_size;
664 buf->f_blocks = wnd->nbits;
666 buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd);
667 buf->f_fsid.val[0] = sbi->volume.ser_num;
668 buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32);
669 buf->f_namelen = NTFS_NAME_LEN;
674 static int ntfs_show_options(struct seq_file *m, struct dentry *root)
676 struct super_block *sb = root->d_sb;
677 struct ntfs_sb_info *sbi = sb->s_fs_info;
678 struct ntfs_mount_options *opts = sbi->options;
679 struct user_namespace *user_ns = seq_user_ns(m);
681 seq_printf(m, ",uid=%u", from_kuid_munged(user_ns, opts->fs_uid));
682 seq_printf(m, ",gid=%u", from_kgid_munged(user_ns, opts->fs_gid));
684 seq_printf(m, ",dmask=%04o", opts->fs_dmask_inv ^ 0xffff);
686 seq_printf(m, ",fmask=%04o", opts->fs_fmask_inv ^ 0xffff);
687 if (opts->sys_immutable)
688 seq_puts(m, ",sys_immutable");
690 seq_puts(m, ",discard");
692 seq_puts(m, ",force");
694 seq_puts(m, ",sparse");
696 seq_puts(m, ",nohidden");
697 if (opts->hide_dot_files)
698 seq_puts(m, ",hide_dot_files");
699 if (opts->windows_names)
700 seq_puts(m, ",windows_names");
702 seq_puts(m, ",showmeta");
703 if (sb->s_flags & SB_POSIXACL)
706 seq_printf(m, ",iocharset=%s", opts->nls->charset);
708 seq_puts(m, ",iocharset=utf8");
710 seq_puts(m, ",prealloc");
712 seq_puts(m, ",nocase");
718 * ntfs_sync_fs - super_operations::sync_fs
720 static int ntfs_sync_fs(struct super_block *sb, int wait)
723 struct ntfs_sb_info *sbi = sb->s_fs_info;
724 struct ntfs_inode *ni;
727 ni = sbi->security.ni;
729 inode = &ni->vfs_inode;
730 err2 = _ni_write_inode(inode, wait);
737 inode = &ni->vfs_inode;
738 err2 = _ni_write_inode(inode, wait);
743 ni = sbi->reparse.ni;
745 inode = &ni->vfs_inode;
746 err2 = _ni_write_inode(inode, wait);
752 ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
754 ntfs_update_mftmirr(sbi, wait);
759 static const struct super_operations ntfs_sops = {
760 .alloc_inode = ntfs_alloc_inode,
761 .free_inode = ntfs_free_inode,
762 .evict_inode = ntfs_evict_inode,
763 .put_super = ntfs_put_super,
764 .statfs = ntfs_statfs,
765 .show_options = ntfs_show_options,
766 .sync_fs = ntfs_sync_fs,
767 .write_inode = ntfs3_write_inode,
770 static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino,
776 ref.low = cpu_to_le32(ino);
777 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
778 ref.high = cpu_to_le16(ino >> 32);
782 ref.seq = cpu_to_le16(generation);
784 inode = ntfs_iget5(sb, &ref, NULL);
785 if (!IS_ERR(inode) && is_bad_inode(inode)) {
787 inode = ERR_PTR(-ESTALE);
793 static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
794 int fh_len, int fh_type)
796 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
797 ntfs_export_get_inode);
800 static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid,
801 int fh_len, int fh_type)
803 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
804 ntfs_export_get_inode);
807 /* TODO: == ntfs_sync_inode */
808 static int ntfs_nfs_commit_metadata(struct inode *inode)
810 return _ni_write_inode(inode, 1);
813 static const struct export_operations ntfs_export_ops = {
814 .encode_fh = generic_encode_ino32_fh,
815 .fh_to_dentry = ntfs_fh_to_dentry,
816 .fh_to_parent = ntfs_fh_to_parent,
817 .get_parent = ntfs3_get_parent,
818 .commit_metadata = ntfs_nfs_commit_metadata,
822 * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb".
824 static u32 format_size_gb(const u64 bytes, u32 *mb)
826 /* Do simple right 30 bit shift of 64 bit value. */
827 u64 kbytes = bytes >> 10;
828 u32 kbytes32 = kbytes;
830 *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20;
834 return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12);
837 static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot)
839 if (boot->sectors_per_clusters <= 0x80)
840 return boot->sectors_per_clusters;
841 if (boot->sectors_per_clusters >= 0xf4) /* limit shift to 2MB max */
842 return 1U << (-(s8)boot->sectors_per_clusters);
847 * ntfs_init_from_boot - Init internal info from on-disk boot sector.
849 * NTFS mount begins from boot - special formatted 512 bytes.
850 * There are two boots: the first and the last 512 bytes of volume.
851 * The content of boot is not changed during ntfs life.
853 * NOTE: ntfs.sys checks only first (primary) boot.
854 * chkdsk checks both boots.
856 static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
857 u64 dev_size, struct NTFS_BOOT **boot2)
859 struct ntfs_sb_info *sbi = sb->s_fs_info;
861 u32 mb, gb, boot_sector_size, sct_per_clst, record_size;
862 u64 sectors, clusters, mlcn, mlcn2, dev_size0;
863 struct NTFS_BOOT *boot;
864 struct buffer_head *bh;
869 const char *hint = "Primary boot";
871 /* Save original dev_size. Used with alternative boot. */
872 dev_size0 = dev_size;
874 sbi->volume.blocks = dev_size >> PAGE_SHIFT;
876 bh = ntfs_bread(sb, 0);
883 /* Corrupted image; do not read OOB */
884 if (bh->b_size - sizeof(*boot) < boot_off)
887 boot = (struct NTFS_BOOT *)Add2Ptr(bh->b_data, boot_off);
889 if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) {
890 ntfs_err(sb, "%s signature is not NTFS.", hint);
894 /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/
895 /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1])
899 boot_sector_size = ((u32)boot->bytes_per_sector[1] << 8) |
900 boot->bytes_per_sector[0];
901 if (boot_sector_size < SECTOR_SIZE ||
902 !is_power_of_2(boot_sector_size)) {
903 ntfs_err(sb, "%s: invalid bytes per sector %u.", hint,
908 /* cluster size: 512, 1K, 2K, 4K, ... 2M */
909 sct_per_clst = true_sectors_per_clst(boot);
910 if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) {
911 ntfs_err(sb, "%s: invalid sectors per cluster %u.", hint,
916 sbi->cluster_size = boot_sector_size * sct_per_clst;
917 sbi->cluster_bits = cluster_bits = blksize_bits(sbi->cluster_size);
918 sbi->cluster_mask = sbi->cluster_size - 1;
919 sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask;
921 mlcn = le64_to_cpu(boot->mft_clst);
922 mlcn2 = le64_to_cpu(boot->mft2_clst);
923 sectors = le64_to_cpu(boot->sectors_per_volume);
925 if (mlcn * sct_per_clst >= sectors || mlcn2 * sct_per_clst >= sectors) {
928 "%s: start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.",
929 hint, mlcn, mlcn2, sectors);
933 if (boot->record_size >= 0) {
934 record_size = (u32)boot->record_size << cluster_bits;
935 } else if (-boot->record_size <= MAXIMUM_SHIFT_BYTES_PER_MFT) {
936 record_size = 1u << (-boot->record_size);
938 ntfs_err(sb, "%s: invalid record size %d.", hint,
943 sbi->record_size = record_size;
944 sbi->record_bits = blksize_bits(record_size);
945 sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes
947 /* Check MFT record size. */
948 if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) {
949 ntfs_err(sb, "%s: invalid bytes per MFT record %u (%d).", hint,
950 record_size, boot->record_size);
954 if (record_size > MAXIMUM_BYTES_PER_MFT) {
955 ntfs_err(sb, "Unsupported bytes per MFT record %u.",
960 if (boot->index_size >= 0) {
961 sbi->index_size = (u32)boot->index_size << cluster_bits;
962 } else if (-boot->index_size <= MAXIMUM_SHIFT_BYTES_PER_INDEX) {
963 sbi->index_size = 1u << (-boot->index_size);
965 ntfs_err(sb, "%s: invalid index size %d.", hint,
970 /* Check index record size. */
971 if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) {
972 ntfs_err(sb, "%s: invalid bytes per index %u(%d).", hint,
973 sbi->index_size, boot->index_size);
977 if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) {
978 ntfs_err(sb, "%s: unsupported bytes per index %u.", hint,
983 sbi->volume.size = sectors * boot_sector_size;
985 gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb);
988 * - Volume formatted and mounted with the same sector size.
989 * - Volume formatted 4K and mounted as 512.
990 * - Volume formatted 512 and mounted as 4K.
992 if (boot_sector_size != sector_size) {
995 "Different NTFS sector size (%u) and media sector size (%u).",
996 boot_sector_size, sector_size);
997 dev_size += sector_size - 1;
1000 sbi->mft.lbo = mlcn << cluster_bits;
1001 sbi->mft.lbo2 = mlcn2 << cluster_bits;
1003 /* Compare boot's cluster and sector. */
1004 if (sbi->cluster_size < boot_sector_size) {
1005 ntfs_err(sb, "%s: invalid bytes per cluster (%u).", hint,
1010 /* Compare boot's cluster and media sector. */
1011 if (sbi->cluster_size < sector_size) {
1012 /* No way to use ntfs_get_block in this case. */
1015 "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u).",
1016 sbi->cluster_size, sector_size);
1020 sbi->max_bytes_per_attr =
1021 record_size - ALIGN(MFTRECORD_FIXUP_OFFSET, 8) -
1022 ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) -
1023 ALIGN(sizeof(enum ATTR_TYPE), 8);
1025 sbi->volume.ser_num = le64_to_cpu(boot->serial_num);
1027 /* Warning if RAW volume. */
1028 if (dev_size < sbi->volume.size + boot_sector_size) {
1031 gb0 = format_size_gb(dev_size, &mb0);
1034 "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only.",
1036 sb->s_flags |= SB_RDONLY;
1039 clusters = sbi->volume.size >> cluster_bits;
1040 #ifndef CONFIG_NTFS3_64BIT_CLUSTER
1041 /* 32 bits per cluster. */
1042 if (clusters >> 32) {
1045 "NTFS %u.%02u Gb is too big to use 32 bits per cluster.",
1049 #elif BITS_PER_LONG < 64
1050 #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS"
1053 sbi->used.bitmap.nbits = clusters;
1055 rec = kzalloc(record_size, GFP_NOFS);
1062 rec->rhdr.sign = NTFS_FILE_SIGNATURE;
1063 rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET);
1064 fn = (sbi->record_size >> SECTOR_SHIFT) + 1;
1065 rec->rhdr.fix_num = cpu_to_le16(fn);
1066 ao = ALIGN(MFTRECORD_FIXUP_OFFSET + sizeof(short) * fn, 8);
1067 rec->attr_off = cpu_to_le16(ao);
1068 rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8));
1069 rec->total = cpu_to_le32(sbi->record_size);
1070 ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END;
1072 sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE));
1074 sbi->block_mask = sb->s_blocksize - 1;
1075 sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits;
1076 sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits;
1078 /* Maximum size for normal files. */
1079 sbi->maxbytes = (clusters << cluster_bits) - 1;
1081 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
1082 if (clusters >= (1ull << (64 - cluster_bits)))
1084 sbi->maxbytes_sparse = -1;
1085 sb->s_maxbytes = MAX_LFS_FILESIZE;
1087 /* Maximum size for sparse file. */
1088 sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1;
1089 sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits;
1093 * Compute the MFT zone at two steps.
1094 * It would be nice if we are able to allocate 1/8 of
1095 * total clusters for MFT but not more then 512 MB.
1097 sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3);
1101 if (bh->b_blocknr && !sb_rdonly(sb)) {
1103 * Alternative boot is ok but primary is not ok.
1104 * Do not update primary boot here 'cause it may be faked boot.
1105 * Let ntfs to be mounted and update boot later.
1107 *boot2 = kmemdup(boot, sizeof(*boot), GFP_NOFS | __GFP_NOWARN);
1111 if (err == -EINVAL && !bh->b_blocknr && dev_size0 > PAGE_SHIFT) {
1112 u32 block_size = min_t(u32, sector_size, PAGE_SIZE);
1113 u64 lbo = dev_size0 - sizeof(*boot);
1116 * Try alternative boot (last sector)
1120 sb_set_blocksize(sb, block_size);
1121 bh = ntfs_bread(sb, lbo >> blksize_bits(block_size));
1125 boot_off = lbo & (block_size - 1);
1126 hint = "Alternative boot";
1127 dev_size = dev_size0; /* restore original size. */
1136 * ntfs_fill_super - Try to mount.
1138 static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
1141 struct ntfs_sb_info *sbi = sb->s_fs_info;
1142 struct block_device *bdev = sb->s_bdev;
1143 struct ntfs_mount_options *options;
1144 struct inode *inode;
1145 struct ntfs_inode *ni;
1146 size_t i, tt, bad_len, bad_frags;
1148 struct ATTRIB *attr;
1149 const struct VOLUME_INFO *info;
1150 u32 idx, done, bytes;
1151 struct ATTR_DEF_ENTRY *t;
1154 bool ro = sb_rdonly(sb);
1155 struct NTFS_BOOT *boot2 = NULL;
1160 sbi->options = options = fc->fs_private;
1161 fc->fs_private = NULL;
1162 sb->s_flags |= SB_NODIRATIME;
1163 sb->s_magic = 0x7366746e; // "ntfs"
1164 sb->s_op = &ntfs_sops;
1165 sb->s_export_op = &ntfs_export_ops;
1166 sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec
1167 sb->s_xattr = ntfs_xattr_handlers;
1168 sb->s_d_op = options->nocase ? &ntfs_dentry_ops : NULL;
1170 options->nls = ntfs_load_nls(options->nls_name);
1171 if (IS_ERR(options->nls)) {
1172 options->nls = NULL;
1173 errorf(fc, "Cannot load nls %s", options->nls_name);
1178 if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) {
1179 sbi->discard_granularity = bdev_discard_granularity(bdev);
1180 sbi->discard_granularity_mask_inv =
1181 ~(u64)(sbi->discard_granularity - 1);
1185 err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev),
1186 bdev_nr_bytes(bdev), &boot2);
1191 * Load $Volume. This should be done before $LogFile
1192 * 'cause 'sbi->volume.ni' is used 'ntfs_set_state'.
1194 ref.low = cpu_to_le32(MFT_REC_VOL);
1195 ref.seq = cpu_to_le16(MFT_REC_VOL);
1196 inode = ntfs_iget5(sb, &ref, &NAME_VOLUME);
1197 if (IS_ERR(inode)) {
1198 err = PTR_ERR(inode);
1199 ntfs_err(sb, "Failed to load $Volume (%d).", err);
1205 /* Load and save label (not necessary). */
1206 attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL);
1209 /* It is ok if no ATTR_LABEL */
1210 } else if (!attr->non_res && !is_attr_ext(attr)) {
1211 /* $AttrDef allows labels to be up to 128 symbols. */
1212 err = utf16s_to_utf8s(resident_data(attr),
1213 le32_to_cpu(attr->res.data_size) >> 1,
1214 UTF16_LITTLE_ENDIAN, sbi->volume.label,
1215 sizeof(sbi->volume.label));
1217 sbi->volume.label[0] = 0;
1219 /* Should we break mounting here? */
1221 //goto put_inode_out;
1224 attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL);
1225 if (!attr || is_attr_ext(attr) ||
1226 !(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) {
1227 ntfs_err(sb, "$Volume is corrupted.");
1232 sbi->volume.major_ver = info->major_ver;
1233 sbi->volume.minor_ver = info->minor_ver;
1234 sbi->volume.flags = info->flags;
1235 sbi->volume.ni = ni;
1236 if (info->flags & VOLUME_FLAG_DIRTY) {
1237 sbi->volume.real_dirty = true;
1238 ntfs_info(sb, "It is recommened to use chkdsk.");
1241 /* Load $MFTMirr to estimate recs_mirr. */
1242 ref.low = cpu_to_le32(MFT_REC_MIRR);
1243 ref.seq = cpu_to_le16(MFT_REC_MIRR);
1244 inode = ntfs_iget5(sb, &ref, &NAME_MIRROR);
1245 if (IS_ERR(inode)) {
1246 err = PTR_ERR(inode);
1247 ntfs_err(sb, "Failed to load $MFTMirr (%d).", err);
1251 sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >>
1256 /* Load LogFile to replay. */
1257 ref.low = cpu_to_le32(MFT_REC_LOG);
1258 ref.seq = cpu_to_le16(MFT_REC_LOG);
1259 inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE);
1260 if (IS_ERR(inode)) {
1261 err = PTR_ERR(inode);
1262 ntfs_err(sb, "Failed to load \x24LogFile (%d).", err);
1268 err = ntfs_loadlog_and_replay(ni, sbi);
1274 if ((sbi->flags & NTFS_FLAGS_NEED_REPLAY) && !ro) {
1275 ntfs_warn(sb, "failed to replay log file. Can't mount rw!");
1280 if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !options->force) {
1281 ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!");
1287 ref.low = cpu_to_le32(MFT_REC_MFT);
1288 ref.seq = cpu_to_le16(1);
1290 inode = ntfs_iget5(sb, &ref, &NAME_MFT);
1291 if (IS_ERR(inode)) {
1292 err = PTR_ERR(inode);
1293 ntfs_err(sb, "Failed to load $MFT (%d).", err);
1299 sbi->mft.used = ni->i_valid >> sbi->record_bits;
1300 tt = inode->i_size >> sbi->record_bits;
1301 sbi->mft.next_free = MFT_REC_USER;
1303 err = wnd_init(&sbi->mft.bitmap, sb, tt);
1307 err = ni_load_all_mi(ni);
1309 ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err);
1316 ref.low = cpu_to_le32(MFT_REC_BITMAP);
1317 ref.seq = cpu_to_le16(MFT_REC_BITMAP);
1318 inode = ntfs_iget5(sb, &ref, &NAME_BITMAP);
1319 if (IS_ERR(inode)) {
1320 err = PTR_ERR(inode);
1321 ntfs_err(sb, "Failed to load $Bitmap (%d).", err);
1325 #ifndef CONFIG_NTFS3_64BIT_CLUSTER
1326 if (inode->i_size >> 32) {
1332 /* Check bitmap boundary. */
1333 tt = sbi->used.bitmap.nbits;
1334 if (inode->i_size < bitmap_size(tt)) {
1335 ntfs_err(sb, "$Bitmap is corrupted.");
1340 err = wnd_init(&sbi->used.bitmap, sb, tt);
1342 ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err);
1348 /* Compute the MFT zone. */
1349 err = ntfs_refresh_zone(sbi);
1351 ntfs_err(sb, "Failed to initialize MFT zone (%d).", err);
1355 /* Load $BadClus. */
1356 ref.low = cpu_to_le32(MFT_REC_BADCLUST);
1357 ref.seq = cpu_to_le16(MFT_REC_BADCLUST);
1358 inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS);
1359 if (IS_ERR(inode)) {
1360 err = PTR_ERR(inode);
1361 ntfs_err(sb, "Failed to load $BadClus (%d).", err);
1366 bad_len = bad_frags = 0;
1367 for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) {
1368 if (lcn == SPARSE_LCN)
1376 if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) {
1377 /* Bad blocks marked as free in bitmap. */
1378 ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
1383 * Notice about bad blocks.
1384 * In normal cases these blocks are marked as used in bitmap.
1385 * And we never allocate space in it.
1388 "Volume contains %zu bad blocks in %zu fragments.",
1389 bad_len, bad_frags);
1393 /* Load $AttrDef. */
1394 ref.low = cpu_to_le32(MFT_REC_ATTR);
1395 ref.seq = cpu_to_le16(MFT_REC_ATTR);
1396 inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF);
1397 if (IS_ERR(inode)) {
1398 err = PTR_ERR(inode);
1399 ntfs_err(sb, "Failed to load $AttrDef (%d)", err);
1404 * Typical $AttrDef contains up to 20 entries.
1405 * Check for extremely large/small size.
1407 if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) ||
1408 inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) {
1409 ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).",
1415 bytes = inode->i_size;
1416 sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL);
1422 for (done = idx = 0; done < bytes; done += PAGE_SIZE, idx++) {
1423 unsigned long tail = bytes - done;
1424 struct page *page = ntfs_map_page(inode->i_mapping, idx);
1427 err = PTR_ERR(page);
1428 ntfs_err(sb, "Failed to read $AttrDef (%d).", err);
1431 memcpy(Add2Ptr(t, done), page_address(page),
1432 min(PAGE_SIZE, tail));
1433 ntfs_unmap_page(page);
1435 if (!idx && ATTR_STD != t->type) {
1436 ntfs_err(sb, "$AttrDef is corrupted.");
1443 sbi->def_entries = 1;
1444 done = sizeof(struct ATTR_DEF_ENTRY);
1445 sbi->reparse.max_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE;
1446 sbi->ea_max_size = 0x10000; /* default formatter value */
1448 while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) {
1449 u32 t32 = le32_to_cpu(t->type);
1450 u64 sz = le64_to_cpu(t->max_sz);
1452 if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32)
1455 if (t->type == ATTR_REPARSE)
1456 sbi->reparse.max_size = sz;
1457 else if (t->type == ATTR_EA)
1458 sbi->ea_max_size = sz;
1460 done += sizeof(struct ATTR_DEF_ENTRY);
1462 sbi->def_entries += 1;
1467 ref.low = cpu_to_le32(MFT_REC_UPCASE);
1468 ref.seq = cpu_to_le16(MFT_REC_UPCASE);
1469 inode = ntfs_iget5(sb, &ref, &NAME_UPCASE);
1470 if (IS_ERR(inode)) {
1471 err = PTR_ERR(inode);
1472 ntfs_err(sb, "Failed to load $UpCase (%d).", err);
1476 if (inode->i_size != 0x10000 * sizeof(short)) {
1478 ntfs_err(sb, "$UpCase is corrupted.");
1482 for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) {
1484 u16 *dst = Add2Ptr(sbi->upcase, idx << PAGE_SHIFT);
1485 struct page *page = ntfs_map_page(inode->i_mapping, idx);
1488 err = PTR_ERR(page);
1489 ntfs_err(sb, "Failed to read $UpCase (%d).", err);
1493 src = page_address(page);
1496 for (i = 0; i < PAGE_SIZE / sizeof(u16); i++)
1497 *dst++ = le16_to_cpu(*src++);
1499 memcpy(dst, src, PAGE_SIZE);
1501 ntfs_unmap_page(page);
1504 shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short));
1505 if (shared && sbi->upcase != shared) {
1506 kvfree(sbi->upcase);
1507 sbi->upcase = shared;
1512 if (is_ntfs3(sbi)) {
1514 err = ntfs_security_init(sbi);
1516 ntfs_err(sb, "Failed to initialize $Secure (%d).", err);
1521 err = ntfs_extend_init(sbi);
1523 ntfs_warn(sb, "Failed to initialize $Extend.");
1527 /* Load $Extend/$Reparse. */
1528 err = ntfs_reparse_init(sbi);
1530 ntfs_warn(sb, "Failed to initialize $Extend/$Reparse.");
1534 /* Load $Extend/$ObjId. */
1535 err = ntfs_objid_init(sbi);
1537 ntfs_warn(sb, "Failed to initialize $Extend/$ObjId.");
1544 ref.low = cpu_to_le32(MFT_REC_ROOT);
1545 ref.seq = cpu_to_le16(MFT_REC_ROOT);
1546 inode = ntfs_iget5(sb, &ref, &NAME_ROOT);
1547 if (IS_ERR(inode)) {
1548 err = PTR_ERR(inode);
1549 ntfs_err(sb, "Failed to load root (%d).", err);
1554 * Final check. Looks like this case should never occurs.
1558 ntfs_err(sb, "Failed to load root (%d).", err);
1562 sb->s_root = d_make_root(inode);
1570 * Alternative boot is ok but primary is not ok.
1571 * Volume is recognized as NTFS. Update primary boot.
1573 struct buffer_head *bh0 = sb_getblk(sb, 0);
1575 if (buffer_locked(bh0))
1576 __wait_on_buffer(bh0);
1579 memcpy(bh0->b_data, boot2, sizeof(*boot2));
1580 set_buffer_uptodate(bh0);
1581 mark_buffer_dirty(bh0);
1583 if (!sync_dirty_buffer(bh0))
1584 ntfs_warn(sb, "primary boot is updated");
1591 #ifdef CONFIG_PROC_FS
1592 /* Create /proc/fs/ntfs3/.. */
1593 if (proc_info_root) {
1594 struct proc_dir_entry *e = proc_mkdir(sb->s_id, proc_info_root);
1595 static_assert((S_IRUGO | S_IWUSR) == 0644);
1597 proc_create_data("volinfo", S_IRUGO, e,
1598 &ntfs3_volinfo_fops, sb);
1599 proc_create_data("label", S_IRUGO | S_IWUSR, e,
1600 &ntfs3_label_fops, sb);
1617 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len)
1619 struct ntfs_sb_info *sbi = sb->s_fs_info;
1620 struct block_device *bdev = sb->s_bdev;
1621 sector_t devblock = (u64)lcn * sbi->blocks_per_cluster;
1622 unsigned long blocks = (u64)len * sbi->blocks_per_cluster;
1623 unsigned long cnt = 0;
1624 unsigned long limit = global_zone_page_state(NR_FREE_PAGES)
1625 << (PAGE_SHIFT - sb->s_blocksize_bits);
1627 if (limit >= 0x2000)
1629 else if (limit < 32)
1635 clean_bdev_aliases(bdev, devblock++, 1);
1636 if (cnt++ >= limit) {
1637 sync_blockdev(bdev);
1644 * ntfs_discard - Issue a discard request (trim for SSD).
1646 int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len)
1649 u64 lbo, bytes, start, end;
1650 struct super_block *sb;
1652 if (sbi->used.next_free_lcn == lcn + len)
1653 sbi->used.next_free_lcn = lcn;
1655 if (sbi->flags & NTFS_FLAGS_NODISCARD)
1658 if (!sbi->options->discard)
1661 lbo = (u64)lcn << sbi->cluster_bits;
1662 bytes = (u64)len << sbi->cluster_bits;
1664 /* Align up 'start' on discard_granularity. */
1665 start = (lbo + sbi->discard_granularity - 1) &
1666 sbi->discard_granularity_mask_inv;
1667 /* Align down 'end' on discard_granularity. */
1668 end = (lbo + bytes) & sbi->discard_granularity_mask_inv;
1674 err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9,
1677 if (err == -EOPNOTSUPP)
1678 sbi->flags |= NTFS_FLAGS_NODISCARD;
1683 static int ntfs_fs_get_tree(struct fs_context *fc)
1685 return get_tree_bdev(fc, ntfs_fill_super);
1689 * ntfs_fs_free - Free fs_context.
1691 * Note that this will be called after fill_super and reconfigure
1692 * even when they pass. So they have to take pointers if they pass.
1694 static void ntfs_fs_free(struct fs_context *fc)
1696 struct ntfs_mount_options *opts = fc->fs_private;
1697 struct ntfs_sb_info *sbi = fc->s_fs_info;
1701 ntfs3_free_sbi(sbi);
1705 put_mount_options(opts);
1709 static const struct fs_context_operations ntfs_context_ops = {
1710 .parse_param = ntfs_fs_parse_param,
1711 .get_tree = ntfs_fs_get_tree,
1712 .reconfigure = ntfs_fs_reconfigure,
1713 .free = ntfs_fs_free,
1718 * ntfs_init_fs_context - Initialize sbi and opts
1720 * This will called when mount/remount. We will first initialize
1721 * options so that if remount we can use just that.
1723 static int ntfs_init_fs_context(struct fs_context *fc)
1725 struct ntfs_mount_options *opts;
1726 struct ntfs_sb_info *sbi;
1728 opts = kzalloc(sizeof(struct ntfs_mount_options), GFP_NOFS);
1732 /* Default options. */
1733 opts->fs_uid = current_uid();
1734 opts->fs_gid = current_gid();
1735 opts->fs_fmask_inv = ~current_umask();
1736 opts->fs_dmask_inv = ~current_umask();
1738 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE)
1741 sbi = kzalloc(sizeof(struct ntfs_sb_info), GFP_NOFS);
1745 sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL);
1749 ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL,
1750 DEFAULT_RATELIMIT_BURST);
1752 mutex_init(&sbi->compress.mtx_lznt);
1753 #ifdef CONFIG_NTFS3_LZX_XPRESS
1754 mutex_init(&sbi->compress.mtx_xpress);
1755 mutex_init(&sbi->compress.mtx_lzx);
1758 fc->s_fs_info = sbi;
1760 fc->fs_private = opts;
1761 fc->ops = &ntfs_context_ops;
1771 static void ntfs3_kill_sb(struct super_block *sb)
1773 struct ntfs_sb_info *sbi = sb->s_fs_info;
1775 kill_block_super(sb);
1778 put_mount_options(sbi->options);
1779 ntfs3_free_sbi(sbi);
1783 static struct file_system_type ntfs_fs_type = {
1784 .owner = THIS_MODULE,
1786 .init_fs_context = ntfs_init_fs_context,
1787 .parameters = ntfs_fs_parameters,
1788 .kill_sb = ntfs3_kill_sb,
1789 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
1793 static int __init init_ntfs_fs(void)
1797 pr_info("ntfs3: Max link count %u\n", NTFS_LINK_MAX);
1799 if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL))
1800 pr_info("ntfs3: Enabled Linux POSIX ACLs support\n");
1801 if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER))
1803 "ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n");
1804 if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS))
1805 pr_info("ntfs3: Read-only LZX/Xpress compression included\n");
1807 #ifdef CONFIG_PROC_FS
1808 /* Create "/proc/fs/ntfs3" */
1809 proc_info_root = proc_mkdir("fs/ntfs3", NULL);
1812 err = ntfs3_init_bitmap();
1816 ntfs_inode_cachep = kmem_cache_create(
1817 "ntfs_inode_cache", sizeof(struct ntfs_inode), 0,
1818 (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT),
1820 if (!ntfs_inode_cachep) {
1825 err = register_filesystem(&ntfs_fs_type);
1831 kmem_cache_destroy(ntfs_inode_cachep);
1833 ntfs3_exit_bitmap();
1837 static void __exit exit_ntfs_fs(void)
1840 kmem_cache_destroy(ntfs_inode_cachep);
1841 unregister_filesystem(&ntfs_fs_type);
1842 ntfs3_exit_bitmap();
1844 #ifdef CONFIG_PROC_FS
1846 remove_proc_entry("fs/ntfs3", NULL);
1850 MODULE_LICENSE("GPL");
1851 MODULE_DESCRIPTION("ntfs3 read/write filesystem");
1852 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
1853 MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support");
1855 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
1858 "Warning: Activated 64 bits per cluster. Windows does not support this");
1860 #ifdef CONFIG_NTFS3_LZX_XPRESS
1861 MODULE_INFO(compression, "Read-only lzx/xpress compression included");
1864 MODULE_AUTHOR("Konstantin Komarov");
1865 MODULE_ALIAS_FS("ntfs3");
1867 module_init(init_ntfs_fs);
1868 module_exit(exit_ntfs_fs);