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/jiffies.h>
20 #include <linux/ctype.h>
21 #include <linux/slab.h>
22 #include <linux/buffer_head.h>
23 #include <linux/namei.h>
27 * If new entry was created in the parent, it could create the 8.3
28 * alias (the shortname of logname). So, the parent may have the
29 * negative-dentry which matches the created 8.3 alias.
31 * If it happened, the negative dentry isn't actually negative
32 * anymore. So, drop it.
34 static int vfat_revalidate_shortname(struct dentry *dentry)
37 spin_lock(&dentry->d_lock);
38 if (dentry->d_time != dentry->d_parent->d_inode->i_version)
40 spin_unlock(&dentry->d_lock);
44 static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
46 if (nd && nd->flags & LOOKUP_RCU)
49 /* This is not negative dentry. Always valid. */
52 return vfat_revalidate_shortname(dentry);
55 static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
57 if (nd && nd->flags & LOOKUP_RCU)
61 * This is not negative dentry. Always valid.
63 * Note, rename() to existing directory entry will have ->d_inode,
64 * and will use existing name which isn't specified name by user.
66 * We may be able to drop this positive dentry here. But dropping
67 * positive dentry isn't good idea. So it's unsupported like
68 * rename("filename", "FILENAME") for now.
74 * This may be nfsd (or something), anyway, we can't see the
75 * intent of this. So, since this can be for creation, drop it.
81 * Drop the negative dentry, in order to make sure to use the
82 * case sensitive name which is specified by user if this is
85 if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
88 return vfat_revalidate_shortname(dentry);
91 /* returns the length of a struct qstr, ignoring trailing dots */
92 static unsigned int __vfat_striptail_len(unsigned int len, const char *name)
94 while (len && name[len - 1] == '.')
99 static unsigned int vfat_striptail_len(const struct qstr *qstr)
101 return __vfat_striptail_len(qstr->len, qstr->name);
105 * Compute the hash for the vfat name corresponding to the dentry.
106 * Note: if the name is invalid, we leave the hash code unchanged so
107 * that the existing dentry can be used. The vfat fs routines will
108 * return ENOENT or EINVAL as appropriate.
110 static int vfat_hash(const struct dentry *dentry, const struct inode *inode,
113 qstr->hash = full_name_hash(qstr->name, vfat_striptail_len(qstr));
118 * Compute the hash for the vfat name corresponding to the dentry.
119 * Note: if the name is invalid, we leave the hash code unchanged so
120 * that the existing dentry can be used. The vfat fs routines will
121 * return ENOENT or EINVAL as appropriate.
123 static int vfat_hashi(const struct dentry *dentry, const struct inode *inode,
126 struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
127 const unsigned char *name;
132 len = vfat_striptail_len(qstr);
134 hash = init_name_hash();
136 hash = partial_name_hash(nls_tolower(t, *name++), hash);
137 qstr->hash = end_name_hash(hash);
143 * Case insensitive compare of two vfat names.
145 static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode,
146 const struct dentry *dentry, const struct inode *inode,
147 unsigned int len, const char *str, const struct qstr *name)
149 struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io;
150 unsigned int alen, blen;
152 /* A filename cannot end in '.' or we treat it like it has none */
153 alen = vfat_striptail_len(name);
154 blen = __vfat_striptail_len(len, str);
156 if (nls_strnicmp(t, name->name, str, alen) == 0)
163 * Case sensitive compare of two vfat names.
165 static int vfat_cmp(const struct dentry *parent, const struct inode *pinode,
166 const struct dentry *dentry, const struct inode *inode,
167 unsigned int len, const char *str, const struct qstr *name)
169 unsigned int alen, blen;
171 /* A filename cannot end in '.' or we treat it like it has none */
172 alen = vfat_striptail_len(name);
173 blen = __vfat_striptail_len(len, str);
175 if (strncmp(name->name, str, alen) == 0)
181 static const struct dentry_operations vfat_ci_dentry_ops = {
182 .d_revalidate = vfat_revalidate_ci,
183 .d_hash = vfat_hashi,
184 .d_compare = vfat_cmpi,
187 static const struct dentry_operations vfat_dentry_ops = {
188 .d_revalidate = vfat_revalidate,
190 .d_compare = vfat_cmp,
193 /* Characters that are undesirable in an MS-DOS file name */
195 static inline wchar_t vfat_bad_char(wchar_t w)
198 || (w == '*') || (w == '?') || (w == '<') || (w == '>')
199 || (w == '|') || (w == '"') || (w == ':') || (w == '/')
203 static inline wchar_t vfat_replace_char(wchar_t w)
205 return (w == '[') || (w == ']') || (w == ';') || (w == ',')
206 || (w == '+') || (w == '=');
209 static wchar_t vfat_skip_char(wchar_t w)
211 return (w == '.') || (w == ' ');
214 static inline int vfat_is_used_badchars(const wchar_t *s, int len)
218 for (i = 0; i < len; i++)
219 if (vfat_bad_char(s[i]))
222 if (s[i - 1] == ' ') /* last character cannot be space */
228 static int vfat_find_form(struct inode *dir, unsigned char *name)
230 struct fat_slot_info sinfo;
231 int err = fat_scan(dir, name, &sinfo);
239 * 1) Valid characters for the 8.3 format alias are any combination of
240 * letters, uppercase alphabets, digits, any of the
241 * following special characters:
242 * $ % ' ` - @ { } ~ ! # ( ) & _ ^
243 * In this case Longfilename is not stored in disk.
246 * File name and extension name is contain uppercase/lowercase
247 * only. And it is expressed by CASE_LOWER_BASE and CASE_LOWER_EXT.
249 * 2) File name is 8.3 format, but it contain the uppercase and
250 * lowercase char, muliti bytes char, etc. In this case numtail is not
251 * added, but Longfilename is stored.
253 * 3) When the one except for the above, or the following special
254 * character are contained:
256 * numtail is added, and Longfilename must be stored in disk .
258 struct shortname_info {
259 unsigned char lower:1,
263 #define INIT_SHORTNAME_INFO(x) do { \
269 static inline int to_shortname_char(struct nls_table *nls,
270 unsigned char *buf, int buf_size,
271 wchar_t *src, struct shortname_info *info)
275 if (vfat_skip_char(*src)) {
279 if (vfat_replace_char(*src)) {
285 len = nls->uni2char(*src, buf, buf_size);
290 } else if (len == 1) {
291 unsigned char prev = buf[0];
293 if (buf[0] >= 0x7F) {
298 buf[0] = nls_toupper(nls, buf[0]);
299 if (isalpha(buf[0])) {
314 * Given a valid longname, create a unique shortname. Make sure the
315 * shortname does not exist
316 * Returns negative number on error, 0 for a normal
317 * return, and 1 for valid shortname
319 static int vfat_create_shortname(struct inode *dir, struct nls_table *nls,
320 wchar_t *uname, int ulen,
321 unsigned char *name_res, unsigned char *lcase)
323 struct fat_mount_options *opts = &MSDOS_SB(dir->i_sb)->options;
324 wchar_t *ip, *ext_start, *end, *name_start;
325 unsigned char base[9], ext[4], buf[5], *p;
326 unsigned char charbuf[NLS_MAX_CHARSET_SIZE];
328 int sz = 0, extlen, baselen, i, numtail_baselen, numtail2_baselen;
330 struct shortname_info base_info, ext_info;
333 INIT_SHORTNAME_INFO(&base_info);
334 INIT_SHORTNAME_INFO(&ext_info);
336 /* Now, we need to create a shortname from the long name */
337 ext_start = end = &uname[ulen];
338 while (--ext_start >= uname) {
339 if (*ext_start == 0x002E) { /* is `.' */
340 if (ext_start == end - 1) {
348 if (ext_start == uname - 1) {
351 } else if (ext_start) {
353 * Names which start with a dot could be just
354 * an extension eg. "...test". In this case Win95
355 * uses the extension as the name and sets no extension.
357 name_start = &uname[0];
358 while (name_start < ext_start) {
359 if (!vfat_skip_char(*name_start))
363 if (name_start != ext_start) {
364 sz = ext_start - uname;
373 numtail2_baselen = 2;
374 for (baselen = i = 0, p = base, ip = uname; i < sz; i++, ip++) {
375 chl = to_shortname_char(nls, charbuf, sizeof(charbuf),
380 if (baselen < 2 && (baselen + chl) > 2)
381 numtail2_baselen = baselen;
382 if (baselen < 6 && (baselen + chl) > 6)
383 numtail_baselen = baselen;
384 for (chi = 0; chi < chl; chi++) {
391 if ((chi < chl - 1) || (ip + 1) - uname < sz)
402 for (p = ext, ip = ext_start; extlen < 3 && ip < end; ip++) {
403 chl = to_shortname_char(nls, charbuf, sizeof(charbuf),
408 if ((extlen + chl) > 3) {
412 for (chi = 0; chi < chl; chi++) {
424 base[baselen] = '\0';
426 /* Yes, it can happen. ".\xe5" would do it. */
427 if (base[0] == DELETED_FLAG)
430 /* OK, at this point we know that base is not longer than 8 symbols,
431 * ext is not longer than 3, base is nonempty, both don't contain
432 * any bad symbols (lowercase transformed to uppercase).
435 memset(name_res, ' ', MSDOS_NAME);
436 memcpy(name_res, base, baselen);
437 memcpy(name_res + 8, ext, extlen);
439 if (is_shortname && base_info.valid && ext_info.valid) {
440 if (vfat_find_form(dir, name_res) == 0)
443 if (opts->shortname & VFAT_SFN_CREATE_WIN95) {
444 return (base_info.upper && ext_info.upper);
445 } else if (opts->shortname & VFAT_SFN_CREATE_WINNT) {
446 if ((base_info.upper || base_info.lower) &&
447 (ext_info.upper || ext_info.lower)) {
448 if (!base_info.upper && base_info.lower)
449 *lcase |= CASE_LOWER_BASE;
450 if (!ext_info.upper && ext_info.lower)
451 *lcase |= CASE_LOWER_EXT;
460 if (opts->numtail == 0)
461 if (vfat_find_form(dir, name_res) < 0)
465 * Try to find a unique extension. This used to
466 * iterate through all possibilities sequentially,
467 * but that gave extremely bad performance. Windows
468 * only tries a few cases before using random
469 * values for part of the base.
473 baselen = numtail_baselen;
476 name_res[baselen] = '~';
477 for (i = 1; i < 10; i++) {
478 name_res[baselen + 1] = i + '0';
479 if (vfat_find_form(dir, name_res) < 0)
484 sz = (jiffies >> 16) & 0x7;
486 baselen = numtail2_baselen;
489 name_res[baselen + 4] = '~';
490 name_res[baselen + 5] = '1' + sz;
492 snprintf(buf, sizeof(buf), "%04X", i & 0xffff);
493 memcpy(&name_res[baselen], buf, 4);
494 if (vfat_find_form(dir, name_res) < 0)
501 /* Translate a string, including coded sequences into Unicode */
503 xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,
504 int *longlen, int *outlen, int escape, int utf8,
505 struct nls_table *nls)
507 const unsigned char *ip;
515 *outlen = utf8s_to_utf16s(name, len, (wchar_t *)outname);
518 else if (*outlen > FAT_LFN_LEN)
519 return -ENAMETOOLONG;
521 op = &outname[*outlen * sizeof(wchar_t)];
524 for (i = 0, ip = name, op = outname, *outlen = 0;
525 i < len && *outlen <= FAT_LFN_LEN;
528 if (escape && (*ip == ':')) {
532 for (k = 1; k < 5; k++) {
535 if (nc >= '0' && nc <= '9') {
539 if (nc >= 'a' && nc <= 'f') {
540 ec |= nc - ('a' - 10);
543 if (nc >= 'A' && nc <= 'F') {
544 ec |= nc - ('A' - 10);
554 if ((charlen = nls->char2uni(ip, len - i, (wchar_t *)op)) < 0)
562 return -ENAMETOOLONG;
564 for (i = 0, ip = name, op = outname, *outlen = 0;
565 i < len && *outlen <= FAT_LFN_LEN;
572 return -ENAMETOOLONG;
582 fill = 13 - (*outlen % 13);
583 for (i = 0; i < fill; i++) {
594 static int vfat_build_slots(struct inode *dir, const unsigned char *name,
595 int len, int is_dir, int cluster,
597 struct msdos_dir_slot *slots, int *nr_slots)
599 struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb);
600 struct fat_mount_options *opts = &sbi->options;
601 struct msdos_dir_slot *ps;
602 struct msdos_dir_entry *de;
603 unsigned char cksum, lcase;
604 unsigned char msdos_name[MSDOS_NAME];
608 int err, ulen, usize, i;
617 err = xlate_to_uni(name, len, (unsigned char *)uname, &ulen, &usize,
618 opts->unicode_xlate, opts->utf8, sbi->nls_io);
622 err = vfat_is_used_badchars(uname, ulen);
626 err = vfat_create_shortname(dir, sbi->nls_disk, uname, ulen,
631 de = (struct msdos_dir_entry *)slots;
636 /* build the entry of long file name */
637 cksum = fat_checksum(msdos_name);
639 *nr_slots = usize / 13;
640 for (ps = slots, i = *nr_slots; i > 0; i--, ps++) {
644 ps->alias_checksum = cksum;
646 offset = (i - 1) * 13;
647 fatwchar_to16(ps->name0_4, uname + offset, 5);
648 fatwchar_to16(ps->name5_10, uname + offset + 5, 6);
649 fatwchar_to16(ps->name11_12, uname + offset + 11, 2);
652 de = (struct msdos_dir_entry *)ps;
655 /* build the entry of 8.3 alias name */
657 memcpy(de->name, msdos_name, MSDOS_NAME);
658 de->attr = is_dir ? ATTR_DIR : ATTR_ARCH;
660 fat_time_unix2fat(sbi, ts, &time, &date, &time_cs);
661 de->time = de->ctime = time;
662 de->date = de->cdate = de->adate = date;
663 de->ctime_cs = time_cs;
664 de->start = cpu_to_le16(cluster);
665 de->starthi = cpu_to_le16(cluster >> 16);
672 static int vfat_add_entry(struct inode *dir, struct qstr *qname, int is_dir,
673 int cluster, struct timespec *ts,
674 struct fat_slot_info *sinfo)
676 struct msdos_dir_slot *slots;
680 len = vfat_striptail_len(qname);
684 slots = kmalloc(sizeof(*slots) * MSDOS_SLOTS, GFP_NOFS);
688 err = vfat_build_slots(dir, qname->name, len, is_dir, cluster, ts,
693 err = fat_add_entries(dir, slots, nr_slots, sinfo);
697 /* update timestamp */
698 dir->i_ctime = dir->i_mtime = dir->i_atime = *ts;
700 (void)fat_sync_inode(dir);
702 mark_inode_dirty(dir);
708 static int vfat_find(struct inode *dir, struct qstr *qname,
709 struct fat_slot_info *sinfo)
711 unsigned int len = vfat_striptail_len(qname);
714 return fat_search_long(dir, qname->name, len, sinfo);
718 * (nfsd's) anonymous disconnected dentry?
719 * NOTE: !IS_ROOT() is not anonymous (I.e. d_splice_alias() did the job).
721 static int vfat_d_anon_disconn(struct dentry *dentry)
723 return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED);
726 static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry,
727 struct nameidata *nd)
729 struct super_block *sb = dir->i_sb;
730 struct fat_slot_info sinfo;
732 struct dentry *alias;
737 err = vfat_find(dir, &dentry->d_name, &sinfo);
739 if (err == -ENOENT) {
746 inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
749 err = PTR_ERR(inode);
753 alias = d_find_alias(inode);
754 if (alias && !vfat_d_anon_disconn(alias)) {
756 * This inode has non anonymous-DCACHE_DISCONNECTED
757 * dentry. This means, the user did ->lookup() by an
758 * another name (longname vs 8.3 alias of it) in past.
760 * Switch to new one for reason of locality if possible.
762 BUG_ON(d_unhashed(alias));
763 if (!S_ISDIR(inode->i_mode))
764 d_move(alias, dentry);
773 dentry->d_time = dentry->d_parent->d_inode->i_version;
774 dentry = d_splice_alias(inode, dentry);
776 dentry->d_time = dentry->d_parent->d_inode->i_version;
784 static int vfat_create(struct inode *dir, struct dentry *dentry, int mode,
785 struct nameidata *nd)
787 struct super_block *sb = dir->i_sb;
789 struct fat_slot_info sinfo;
795 ts = CURRENT_TIME_SEC;
796 err = vfat_add_entry(dir, &dentry->d_name, 0, 0, &ts, &sinfo);
801 inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
804 err = PTR_ERR(inode);
808 inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
809 /* timestamp is already written, so mark_inode_dirty() is unneeded. */
811 dentry->d_time = dentry->d_parent->d_inode->i_version;
812 d_instantiate(dentry, inode);
818 static int vfat_rmdir(struct inode *dir, struct dentry *dentry)
820 struct inode *inode = dentry->d_inode;
821 struct super_block *sb = dir->i_sb;
822 struct fat_slot_info sinfo;
827 err = fat_dir_empty(inode);
830 err = vfat_find(dir, &dentry->d_name, &sinfo);
834 err = fat_remove_entries(dir, &sinfo); /* and releases bh */
840 inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
848 static int vfat_unlink(struct inode *dir, struct dentry *dentry)
850 struct inode *inode = dentry->d_inode;
851 struct super_block *sb = dir->i_sb;
852 struct fat_slot_info sinfo;
857 err = vfat_find(dir, &dentry->d_name, &sinfo);
861 err = fat_remove_entries(dir, &sinfo); /* and releases bh */
865 inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
873 static int vfat_mkdir(struct inode *dir, struct dentry *dentry, int mode)
875 struct super_block *sb = dir->i_sb;
877 struct fat_slot_info sinfo;
883 ts = CURRENT_TIME_SEC;
884 cluster = fat_alloc_new_dir(dir, &ts);
889 err = vfat_add_entry(dir, &dentry->d_name, 1, cluster, &ts, &sinfo);
895 inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
898 err = PTR_ERR(inode);
899 /* the directory was completed, just return a error */
904 inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
905 /* timestamp is already written, so mark_inode_dirty() is unneeded. */
907 dentry->d_time = dentry->d_parent->d_inode->i_version;
908 d_instantiate(dentry, inode);
914 fat_free_clusters(dir, cluster);
920 static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
921 struct inode *new_dir, struct dentry *new_dentry)
923 struct buffer_head *dotdot_bh;
924 struct msdos_dir_entry *dotdot_de;
925 struct inode *old_inode, *new_inode;
926 struct fat_slot_info old_sinfo, sinfo;
928 loff_t dotdot_i_pos, new_i_pos;
929 int err, is_dir, update_dotdot, corrupt = 0;
930 struct super_block *sb = old_dir->i_sb;
932 old_sinfo.bh = sinfo.bh = dotdot_bh = NULL;
933 old_inode = old_dentry->d_inode;
934 new_inode = new_dentry->d_inode;
936 err = vfat_find(old_dir, &old_dentry->d_name, &old_sinfo);
940 is_dir = S_ISDIR(old_inode->i_mode);
941 update_dotdot = (is_dir && old_dir != new_dir);
943 if (fat_get_dotdot_entry(old_inode, &dotdot_bh, &dotdot_de,
944 &dotdot_i_pos) < 0) {
950 ts = CURRENT_TIME_SEC;
953 err = fat_dir_empty(new_inode);
957 new_i_pos = MSDOS_I(new_inode)->i_pos;
958 fat_detach(new_inode);
960 err = vfat_add_entry(new_dir, &new_dentry->d_name, is_dir, 0,
964 new_i_pos = sinfo.i_pos;
966 new_dir->i_version++;
968 fat_detach(old_inode);
969 fat_attach(old_inode, new_i_pos);
970 if (IS_DIRSYNC(new_dir)) {
971 err = fat_sync_inode(old_inode);
975 mark_inode_dirty(old_inode);
978 int start = MSDOS_I(new_dir)->i_logstart;
979 dotdot_de->start = cpu_to_le16(start);
980 dotdot_de->starthi = cpu_to_le16(start >> 16);
981 mark_buffer_dirty_inode(dotdot_bh, old_inode);
982 if (IS_DIRSYNC(new_dir)) {
983 err = sync_dirty_buffer(dotdot_bh);
992 err = fat_remove_entries(old_dir, &old_sinfo); /* and releases bh */
996 old_dir->i_version++;
997 old_dir->i_ctime = old_dir->i_mtime = ts;
998 if (IS_DIRSYNC(old_dir))
999 (void)fat_sync_inode(old_dir);
1001 mark_inode_dirty(old_dir);
1004 drop_nlink(new_inode);
1006 drop_nlink(new_inode);
1007 new_inode->i_ctime = ts;
1012 brelse(old_sinfo.bh);
1018 /* data cluster is shared, serious corruption */
1021 if (update_dotdot) {
1022 int start = MSDOS_I(old_dir)->i_logstart;
1023 dotdot_de->start = cpu_to_le16(start);
1024 dotdot_de->starthi = cpu_to_le16(start >> 16);
1025 mark_buffer_dirty_inode(dotdot_bh, old_inode);
1026 corrupt |= sync_dirty_buffer(dotdot_bh);
1029 fat_detach(old_inode);
1030 fat_attach(old_inode, old_sinfo.i_pos);
1032 fat_attach(new_inode, new_i_pos);
1034 corrupt |= fat_sync_inode(new_inode);
1037 * If new entry was not sharing the data cluster, it
1038 * shouldn't be serious corruption.
1040 int err2 = fat_remove_entries(new_dir, &sinfo);
1046 fat_fs_error(new_dir->i_sb,
1047 "%s: Filesystem corrupted (i_pos %lld)",
1048 __func__, sinfo.i_pos);
1053 static const struct inode_operations vfat_dir_inode_operations = {
1054 .create = vfat_create,
1055 .lookup = vfat_lookup,
1056 .unlink = vfat_unlink,
1057 .mkdir = vfat_mkdir,
1058 .rmdir = vfat_rmdir,
1059 .rename = vfat_rename,
1060 .setattr = fat_setattr,
1061 .getattr = fat_getattr,
1064 static void setup(struct super_block *sb)
1066 MSDOS_SB(sb)->dir_ops = &vfat_dir_inode_operations;
1067 if (MSDOS_SB(sb)->options.name_check != 's')
1068 sb->s_d_op = &vfat_ci_dentry_ops;
1070 sb->s_d_op = &vfat_dentry_ops;
1073 static int vfat_fill_super(struct super_block *sb, void *data, int silent)
1075 return fat_fill_super(sb, data, silent, 1, setup);
1078 static struct dentry *vfat_mount(struct file_system_type *fs_type,
1079 int flags, const char *dev_name,
1082 return mount_bdev(fs_type, flags, dev_name, data, vfat_fill_super);
1085 static struct file_system_type vfat_fs_type = {
1086 .owner = THIS_MODULE,
1088 .mount = vfat_mount,
1089 .kill_sb = kill_block_super,
1090 .fs_flags = FS_REQUIRES_DEV,
1093 static int __init init_vfat_fs(void)
1095 return register_filesystem(&vfat_fs_type);
1098 static void __exit exit_vfat_fs(void)
1100 unregister_filesystem(&vfat_fs_type);
1103 MODULE_LICENSE("GPL");
1104 MODULE_DESCRIPTION("VFAT filesystem support");
1105 MODULE_AUTHOR("Gordon Chaffee");
1107 module_init(init_vfat_fs)
1108 module_exit(exit_vfat_fs)