2 * linux/fs/vfat/namei.c
4 * Written 1992,1993 by Werner Almesberger
6 * Windows95/Windows NT compatible extended MSDOS filesystem
7 * by Gordon Chaffee Copyright (C) 1995. Send bug reports for the
8 * VFAT filesystem to <chaffee@cs.berkeley.edu>. Specify
9 * what file operation caused you trouble and if you can duplicate
10 * the problem, send a script that demonstrates it.
12 * Short name translation 1999, 2001 by Wolfram Pienkoss <wp@bszh.de>
14 * Support Multibyte characters and cleanup by
15 * OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
18 #include <linux/module.h>
19 #include <linux/ctype.h>
20 #include <linux/slab.h>
21 #include <linux/namei.h>
25 * If new entry was created in the parent, it could create the 8.3
26 * alias (the shortname of logname). So, the parent may have the
27 * negative-dentry which matches the created 8.3 alias.
29 * If it happened, the negative dentry isn't actually negative
30 * anymore. So, drop it.
32 static int vfat_revalidate_shortname(struct dentry *dentry)
35 spin_lock(&dentry->d_lock);
36 if (dentry->d_time != d_inode(dentry->d_parent)->i_version)
38 spin_unlock(&dentry->d_lock);
42 static int vfat_revalidate(struct dentry *dentry, unsigned int flags)
44 if (flags & LOOKUP_RCU)
47 /* This is not negative dentry. Always valid. */
48 if (d_really_is_positive(dentry))
50 return vfat_revalidate_shortname(dentry);
53 static int vfat_revalidate_ci(struct dentry *dentry, unsigned int flags)
55 if (flags & LOOKUP_RCU)
59 * This is not negative dentry. Always valid.
61 * Note, rename() to existing directory entry will have ->d_inode,
62 * and will use existing name which isn't specified name by user.
64 * We may be able to drop this positive dentry here. But dropping
65 * positive dentry isn't good idea. So it's unsupported like
66 * rename("filename", "FILENAME") for now.
68 if (d_really_is_positive(dentry))
72 * This may be nfsd (or something), anyway, we can't see the
73 * intent of this. So, since this can be for creation, drop it.
79 * Drop the negative dentry, in order to make sure to use the
80 * case sensitive name which is specified by user if this is
83 if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
86 return vfat_revalidate_shortname(dentry);
89 /* returns the length of a struct qstr, ignoring trailing dots */
90 static unsigned int __vfat_striptail_len(unsigned int len, const char *name)
92 while (len && name[len - 1] == '.')
97 static unsigned int vfat_striptail_len(const struct qstr *qstr)
99 return __vfat_striptail_len(qstr->len, qstr->name);
103 * Compute the hash for the vfat name corresponding to the dentry.
104 * Note: if the name is invalid, we leave the hash code unchanged so
105 * that the existing dentry can be used. The vfat fs routines will
106 * return ENOENT or EINVAL as appropriate.
108 static int vfat_hash(const struct dentry *dentry, struct qstr *qstr)
110 qstr->hash = full_name_hash(dentry, qstr->name, vfat_striptail_len(qstr));
115 * Compute the hash for the vfat name corresponding to the dentry.
116 * Note: if the name is invalid, we leave the hash code unchanged so
117 * that the existing dentry can be used. The vfat fs routines will
118 * return ENOENT or EINVAL as appropriate.
120 static int vfat_hashi(const struct dentry *dentry, struct qstr *qstr)
122 struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
123 const unsigned char *name;
128 len = vfat_striptail_len(qstr);
130 hash = init_name_hash(dentry);
132 hash = partial_name_hash(nls_tolower(t, *name++), hash);
133 qstr->hash = end_name_hash(hash);
139 * Case insensitive compare of two vfat names.
141 static int vfat_cmpi(const struct dentry *dentry,
142 unsigned int len, const char *str, const struct qstr *name)
144 struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
145 unsigned int alen, blen;
147 /* A filename cannot end in '.' or we treat it like it has none */
148 alen = vfat_striptail_len(name);
149 blen = __vfat_striptail_len(len, str);
151 if (nls_strnicmp(t, name->name, str, alen) == 0)
158 * Case sensitive compare of two vfat names.
160 static int vfat_cmp(const struct dentry *dentry,
161 unsigned int len, const char *str, const struct qstr *name)
163 unsigned int alen, blen;
165 /* A filename cannot end in '.' or we treat it like it has none */
166 alen = vfat_striptail_len(name);
167 blen = __vfat_striptail_len(len, str);
169 if (strncmp(name->name, str, alen) == 0)
175 static const struct dentry_operations vfat_ci_dentry_ops = {
176 .d_revalidate = vfat_revalidate_ci,
177 .d_hash = vfat_hashi,
178 .d_compare = vfat_cmpi,
181 static const struct dentry_operations vfat_dentry_ops = {
182 .d_revalidate = vfat_revalidate,
184 .d_compare = vfat_cmp,
187 /* Characters that are undesirable in an MS-DOS file name */
189 static inline wchar_t vfat_bad_char(wchar_t w)
192 || (w == '*') || (w == '?') || (w == '<') || (w == '>')
193 || (w == '|') || (w == '"') || (w == ':') || (w == '/')
197 static inline wchar_t vfat_replace_char(wchar_t w)
199 return (w == '[') || (w == ']') || (w == ';') || (w == ',')
200 || (w == '+') || (w == '=');
203 static wchar_t vfat_skip_char(wchar_t w)
205 return (w == '.') || (w == ' ');
208 static inline int vfat_is_used_badchars(const wchar_t *s, int len)
212 for (i = 0; i < len; i++)
213 if (vfat_bad_char(s[i]))
216 if (s[i - 1] == ' ') /* last character cannot be space */
222 static int vfat_find_form(struct inode *dir, unsigned char *name)
224 struct fat_slot_info sinfo;
225 int err = fat_scan(dir, name, &sinfo);
233 * 1) Valid characters for the 8.3 format alias are any combination of
234 * letters, uppercase alphabets, digits, any of the
235 * following special characters:
236 * $ % ' ` - @ { } ~ ! # ( ) & _ ^
237 * In this case Longfilename is not stored in disk.
240 * File name and extension name is contain uppercase/lowercase
241 * only. And it is expressed by CASE_LOWER_BASE and CASE_LOWER_EXT.
243 * 2) File name is 8.3 format, but it contain the uppercase and
244 * lowercase char, muliti bytes char, etc. In this case numtail is not
245 * added, but Longfilename is stored.
247 * 3) When the one except for the above, or the following special
248 * character are contained:
250 * numtail is added, and Longfilename must be stored in disk .
252 struct shortname_info {
253 unsigned char lower:1,
257 #define INIT_SHORTNAME_INFO(x) do { \
263 static inline int to_shortname_char(struct nls_table *nls,
264 unsigned char *buf, int buf_size,
265 wchar_t *src, struct shortname_info *info)
269 if (vfat_skip_char(*src)) {
273 if (vfat_replace_char(*src)) {
279 len = nls->uni2char(*src, buf, buf_size);
284 } else if (len == 1) {
285 unsigned char prev = buf[0];
287 if (buf[0] >= 0x7F) {
292 buf[0] = nls_toupper(nls, buf[0]);
293 if (isalpha(buf[0])) {
308 * Given a valid longname, create a unique shortname. Make sure the
309 * shortname does not exist
310 * Returns negative number on error, 0 for a normal
311 * return, and 1 for valid shortname
313 static int vfat_create_shortname(struct inode *dir, struct nls_table *nls,
314 wchar_t *uname, int ulen,
315 unsigned char *name_res, unsigned char *lcase)
317 struct fat_mount_options *opts = &MSDOS_SB(dir->i_sb)->options;
318 wchar_t *ip, *ext_start, *end, *name_start;
319 unsigned char base[9], ext[4], buf[5], *p;
320 unsigned char charbuf[NLS_MAX_CHARSET_SIZE];
322 int sz = 0, extlen, baselen, i, numtail_baselen, numtail2_baselen;
324 struct shortname_info base_info, ext_info;
327 INIT_SHORTNAME_INFO(&base_info);
328 INIT_SHORTNAME_INFO(&ext_info);
330 /* Now, we need to create a shortname from the long name */
331 ext_start = end = &uname[ulen];
332 while (--ext_start >= uname) {
333 if (*ext_start == 0x002E) { /* is `.' */
334 if (ext_start == end - 1) {
342 if (ext_start == uname - 1) {
345 } else if (ext_start) {
347 * Names which start with a dot could be just
348 * an extension eg. "...test". In this case Win95
349 * uses the extension as the name and sets no extension.
351 name_start = &uname[0];
352 while (name_start < ext_start) {
353 if (!vfat_skip_char(*name_start))
357 if (name_start != ext_start) {
358 sz = ext_start - uname;
367 numtail2_baselen = 2;
368 for (baselen = i = 0, p = base, ip = uname; i < sz; i++, ip++) {
369 chl = to_shortname_char(nls, charbuf, sizeof(charbuf),
374 if (baselen < 2 && (baselen + chl) > 2)
375 numtail2_baselen = baselen;
376 if (baselen < 6 && (baselen + chl) > 6)
377 numtail_baselen = baselen;
378 for (chi = 0; chi < chl; chi++) {
385 if ((chi < chl - 1) || (ip + 1) - uname < sz)
396 for (p = ext, ip = ext_start; extlen < 3 && ip < end; ip++) {
397 chl = to_shortname_char(nls, charbuf, sizeof(charbuf),
402 if ((extlen + chl) > 3) {
406 for (chi = 0; chi < chl; chi++) {
418 base[baselen] = '\0';
420 /* Yes, it can happen. ".\xe5" would do it. */
421 if (base[0] == DELETED_FLAG)
424 /* OK, at this point we know that base is not longer than 8 symbols,
425 * ext is not longer than 3, base is nonempty, both don't contain
426 * any bad symbols (lowercase transformed to uppercase).
429 memset(name_res, ' ', MSDOS_NAME);
430 memcpy(name_res, base, baselen);
431 memcpy(name_res + 8, ext, extlen);
433 if (is_shortname && base_info.valid && ext_info.valid) {
434 if (vfat_find_form(dir, name_res) == 0)
437 if (opts->shortname & VFAT_SFN_CREATE_WIN95) {
438 return (base_info.upper && ext_info.upper);
439 } else if (opts->shortname & VFAT_SFN_CREATE_WINNT) {
440 if ((base_info.upper || base_info.lower) &&
441 (ext_info.upper || ext_info.lower)) {
442 if (!base_info.upper && base_info.lower)
443 *lcase |= CASE_LOWER_BASE;
444 if (!ext_info.upper && ext_info.lower)
445 *lcase |= CASE_LOWER_EXT;
454 if (opts->numtail == 0)
455 if (vfat_find_form(dir, name_res) < 0)
459 * Try to find a unique extension. This used to
460 * iterate through all possibilities sequentially,
461 * but that gave extremely bad performance. Windows
462 * only tries a few cases before using random
463 * values for part of the base.
467 baselen = numtail_baselen;
470 name_res[baselen] = '~';
471 for (i = 1; i < 10; i++) {
472 name_res[baselen + 1] = i + '0';
473 if (vfat_find_form(dir, name_res) < 0)
478 sz = (jiffies >> 16) & 0x7;
480 baselen = numtail2_baselen;
483 name_res[baselen + 4] = '~';
484 name_res[baselen + 5] = '1' + sz;
486 snprintf(buf, sizeof(buf), "%04X", i & 0xffff);
487 memcpy(&name_res[baselen], buf, 4);
488 if (vfat_find_form(dir, name_res) < 0)
495 /* Translate a string, including coded sequences into Unicode */
497 xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,
498 int *longlen, int *outlen, int escape, int utf8,
499 struct nls_table *nls)
501 const unsigned char *ip;
509 *outlen = utf8s_to_utf16s(name, len, UTF16_HOST_ENDIAN,
510 (wchar_t *) outname, FAT_LFN_LEN + 2);
513 else if (*outlen > FAT_LFN_LEN)
514 return -ENAMETOOLONG;
516 op = &outname[*outlen * sizeof(wchar_t)];
518 for (i = 0, ip = name, op = outname, *outlen = 0;
519 i < len && *outlen < FAT_LFN_LEN;
521 if (escape && (*ip == ':')) {
525 for (k = 1; k < 5; k++) {
528 if (nc >= '0' && nc <= '9') {
532 if (nc >= 'a' && nc <= 'f') {
533 ec |= nc - ('a' - 10);
536 if (nc >= 'A' && nc <= 'F') {
537 ec |= nc - ('A' - 10);
547 charlen = nls->char2uni(ip, len - i,
557 return -ENAMETOOLONG;
566 fill = 13 - (*outlen % 13);
567 for (i = 0; i < fill; i++) {
578 static int vfat_build_slots(struct inode *dir, const unsigned char *name,
579 int len, int is_dir, int cluster,
581 struct msdos_dir_slot *slots, int *nr_slots)
583 struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb);
584 struct fat_mount_options *opts = &sbi->options;
585 struct msdos_dir_slot *ps;
586 struct msdos_dir_entry *de;
587 unsigned char cksum, lcase;
588 unsigned char msdos_name[MSDOS_NAME];
592 int err, ulen, usize, i;
601 err = xlate_to_uni(name, len, (unsigned char *)uname, &ulen, &usize,
602 opts->unicode_xlate, opts->utf8, sbi->nls_io);
606 err = vfat_is_used_badchars(uname, ulen);
610 err = vfat_create_shortname(dir, sbi->nls_disk, uname, ulen,
615 de = (struct msdos_dir_entry *)slots;
620 /* build the entry of long file name */
621 cksum = fat_checksum(msdos_name);
623 *nr_slots = usize / 13;
624 for (ps = slots, i = *nr_slots; i > 0; i--, ps++) {
628 ps->alias_checksum = cksum;
630 offset = (i - 1) * 13;
631 fatwchar_to16(ps->name0_4, uname + offset, 5);
632 fatwchar_to16(ps->name5_10, uname + offset + 5, 6);
633 fatwchar_to16(ps->name11_12, uname + offset + 11, 2);
636 de = (struct msdos_dir_entry *)ps;
639 /* build the entry of 8.3 alias name */
641 memcpy(de->name, msdos_name, MSDOS_NAME);
642 de->attr = is_dir ? ATTR_DIR : ATTR_ARCH;
644 fat_time_unix2fat(sbi, ts, &time, &date, &time_cs);
645 de->time = de->ctime = time;
646 de->date = de->cdate = de->adate = date;
647 de->ctime_cs = time_cs;
648 fat_set_start(de, cluster);
655 static int vfat_add_entry(struct inode *dir, const struct qstr *qname,
656 int is_dir, int cluster, struct timespec *ts,
657 struct fat_slot_info *sinfo)
659 struct msdos_dir_slot *slots;
663 len = vfat_striptail_len(qname);
667 slots = kmalloc(sizeof(*slots) * MSDOS_SLOTS, GFP_NOFS);
671 err = vfat_build_slots(dir, qname->name, len, is_dir, cluster, ts,
676 err = fat_add_entries(dir, slots, nr_slots, sinfo);
680 /* update timestamp */
681 dir->i_ctime = dir->i_mtime = dir->i_atime = *ts;
683 (void)fat_sync_inode(dir);
685 mark_inode_dirty(dir);
691 static int vfat_find(struct inode *dir, const struct qstr *qname,
692 struct fat_slot_info *sinfo)
694 unsigned int len = vfat_striptail_len(qname);
697 return fat_search_long(dir, qname->name, len, sinfo);
701 * (nfsd's) anonymous disconnected dentry?
702 * NOTE: !IS_ROOT() is not anonymous (I.e. d_splice_alias() did the job).
704 static int vfat_d_anon_disconn(struct dentry *dentry)
706 return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED);
709 static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry,
712 struct super_block *sb = dir->i_sb;
713 struct fat_slot_info sinfo;
715 struct dentry *alias;
718 mutex_lock(&MSDOS_SB(sb)->s_lock);
720 err = vfat_find(dir, &dentry->d_name, &sinfo);
722 if (err == -ENOENT) {
729 inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
732 err = PTR_ERR(inode);
736 alias = d_find_alias(inode);
738 * Checking "alias->d_parent == dentry->d_parent" to make sure
739 * FS is not corrupted (especially double linked dir).
741 if (alias && alias->d_parent == dentry->d_parent &&
742 !vfat_d_anon_disconn(alias)) {
744 * This inode has non anonymous-DCACHE_DISCONNECTED
745 * dentry. This means, the user did ->lookup() by an
746 * another name (longname vs 8.3 alias of it) in past.
748 * Switch to new one for reason of locality if possible.
750 BUG_ON(d_unhashed(alias));
751 if (!S_ISDIR(inode->i_mode))
752 d_move(alias, dentry);
754 mutex_unlock(&MSDOS_SB(sb)->s_lock);
760 mutex_unlock(&MSDOS_SB(sb)->s_lock);
762 dentry->d_time = dir->i_version;
763 return d_splice_alias(inode, dentry);
765 mutex_unlock(&MSDOS_SB(sb)->s_lock);
769 static int vfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
772 struct super_block *sb = dir->i_sb;
774 struct fat_slot_info sinfo;
778 mutex_lock(&MSDOS_SB(sb)->s_lock);
780 ts = CURRENT_TIME_SEC;
781 err = vfat_add_entry(dir, &dentry->d_name, 0, 0, &ts, &sinfo);
786 inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
789 err = PTR_ERR(inode);
793 inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
794 /* timestamp is already written, so mark_inode_dirty() is unneeded. */
796 d_instantiate(dentry, inode);
798 mutex_unlock(&MSDOS_SB(sb)->s_lock);
802 static int vfat_rmdir(struct inode *dir, struct dentry *dentry)
804 struct inode *inode = d_inode(dentry);
805 struct super_block *sb = dir->i_sb;
806 struct fat_slot_info sinfo;
809 mutex_lock(&MSDOS_SB(sb)->s_lock);
811 err = fat_dir_empty(inode);
814 err = vfat_find(dir, &dentry->d_name, &sinfo);
818 err = fat_remove_entries(dir, &sinfo); /* and releases bh */
824 inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
826 dentry->d_time = dir->i_version;
828 mutex_unlock(&MSDOS_SB(sb)->s_lock);
833 static int vfat_unlink(struct inode *dir, struct dentry *dentry)
835 struct inode *inode = d_inode(dentry);
836 struct super_block *sb = dir->i_sb;
837 struct fat_slot_info sinfo;
840 mutex_lock(&MSDOS_SB(sb)->s_lock);
842 err = vfat_find(dir, &dentry->d_name, &sinfo);
846 err = fat_remove_entries(dir, &sinfo); /* and releases bh */
850 inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
852 dentry->d_time = dir->i_version;
854 mutex_unlock(&MSDOS_SB(sb)->s_lock);
859 static int vfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
861 struct super_block *sb = dir->i_sb;
863 struct fat_slot_info sinfo;
867 mutex_lock(&MSDOS_SB(sb)->s_lock);
869 ts = CURRENT_TIME_SEC;
870 cluster = fat_alloc_new_dir(dir, &ts);
875 err = vfat_add_entry(dir, &dentry->d_name, 1, cluster, &ts, &sinfo);
881 inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
884 err = PTR_ERR(inode);
885 /* the directory was completed, just return a error */
890 inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
891 /* timestamp is already written, so mark_inode_dirty() is unneeded. */
893 d_instantiate(dentry, inode);
895 mutex_unlock(&MSDOS_SB(sb)->s_lock);
899 fat_free_clusters(dir, cluster);
901 mutex_unlock(&MSDOS_SB(sb)->s_lock);
905 static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
906 struct inode *new_dir, struct dentry *new_dentry,
909 struct buffer_head *dotdot_bh;
910 struct msdos_dir_entry *dotdot_de;
911 struct inode *old_inode, *new_inode;
912 struct fat_slot_info old_sinfo, sinfo;
915 int err, is_dir, update_dotdot, corrupt = 0;
916 struct super_block *sb = old_dir->i_sb;
918 if (flags & ~RENAME_NOREPLACE)
921 old_sinfo.bh = sinfo.bh = dotdot_bh = NULL;
922 old_inode = d_inode(old_dentry);
923 new_inode = d_inode(new_dentry);
924 mutex_lock(&MSDOS_SB(sb)->s_lock);
925 err = vfat_find(old_dir, &old_dentry->d_name, &old_sinfo);
929 is_dir = S_ISDIR(old_inode->i_mode);
930 update_dotdot = (is_dir && old_dir != new_dir);
932 if (fat_get_dotdot_entry(old_inode, &dotdot_bh, &dotdot_de)) {
938 ts = CURRENT_TIME_SEC;
941 err = fat_dir_empty(new_inode);
945 new_i_pos = MSDOS_I(new_inode)->i_pos;
946 fat_detach(new_inode);
948 err = vfat_add_entry(new_dir, &new_dentry->d_name, is_dir, 0,
952 new_i_pos = sinfo.i_pos;
954 new_dir->i_version++;
956 fat_detach(old_inode);
957 fat_attach(old_inode, new_i_pos);
958 if (IS_DIRSYNC(new_dir)) {
959 err = fat_sync_inode(old_inode);
963 mark_inode_dirty(old_inode);
966 fat_set_start(dotdot_de, MSDOS_I(new_dir)->i_logstart);
967 mark_buffer_dirty_inode(dotdot_bh, old_inode);
968 if (IS_DIRSYNC(new_dir)) {
969 err = sync_dirty_buffer(dotdot_bh);
978 err = fat_remove_entries(old_dir, &old_sinfo); /* and releases bh */
982 old_dir->i_version++;
983 old_dir->i_ctime = old_dir->i_mtime = ts;
984 if (IS_DIRSYNC(old_dir))
985 (void)fat_sync_inode(old_dir);
987 mark_inode_dirty(old_dir);
990 drop_nlink(new_inode);
992 drop_nlink(new_inode);
993 new_inode->i_ctime = ts;
998 brelse(old_sinfo.bh);
999 mutex_unlock(&MSDOS_SB(sb)->s_lock);
1004 /* data cluster is shared, serious corruption */
1007 if (update_dotdot) {
1008 fat_set_start(dotdot_de, MSDOS_I(old_dir)->i_logstart);
1009 mark_buffer_dirty_inode(dotdot_bh, old_inode);
1010 corrupt |= sync_dirty_buffer(dotdot_bh);
1013 fat_detach(old_inode);
1014 fat_attach(old_inode, old_sinfo.i_pos);
1016 fat_attach(new_inode, new_i_pos);
1018 corrupt |= fat_sync_inode(new_inode);
1021 * If new entry was not sharing the data cluster, it
1022 * shouldn't be serious corruption.
1024 int err2 = fat_remove_entries(new_dir, &sinfo);
1030 fat_fs_error(new_dir->i_sb,
1031 "%s: Filesystem corrupted (i_pos %lld)",
1032 __func__, sinfo.i_pos);
1037 static const struct inode_operations vfat_dir_inode_operations = {
1038 .create = vfat_create,
1039 .lookup = vfat_lookup,
1040 .unlink = vfat_unlink,
1041 .mkdir = vfat_mkdir,
1042 .rmdir = vfat_rmdir,
1043 .rename2 = vfat_rename,
1044 .setattr = fat_setattr,
1045 .getattr = fat_getattr,
1048 static void setup(struct super_block *sb)
1050 MSDOS_SB(sb)->dir_ops = &vfat_dir_inode_operations;
1051 if (MSDOS_SB(sb)->options.name_check != 's')
1052 sb->s_d_op = &vfat_ci_dentry_ops;
1054 sb->s_d_op = &vfat_dentry_ops;
1057 static int vfat_fill_super(struct super_block *sb, void *data, int silent)
1059 return fat_fill_super(sb, data, silent, 1, setup);
1062 static struct dentry *vfat_mount(struct file_system_type *fs_type,
1063 int flags, const char *dev_name,
1066 return mount_bdev(fs_type, flags, dev_name, data, vfat_fill_super);
1069 static struct file_system_type vfat_fs_type = {
1070 .owner = THIS_MODULE,
1072 .mount = vfat_mount,
1073 .kill_sb = kill_block_super,
1074 .fs_flags = FS_REQUIRES_DEV,
1076 MODULE_ALIAS_FS("vfat");
1078 static int __init init_vfat_fs(void)
1080 return register_filesystem(&vfat_fs_type);
1083 static void __exit exit_vfat_fs(void)
1085 unregister_filesystem(&vfat_fs_type);
1088 MODULE_LICENSE("GPL");
1089 MODULE_DESCRIPTION("VFAT filesystem support");
1090 MODULE_AUTHOR("Gordon Chaffee");
1092 module_init(init_vfat_fs)
1093 module_exit(exit_vfat_fs)