Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 1098 deletions

diff --git a/ANDROID_3.4.5/fs/fat/namei_vfat.c b/ANDROID_3.4.5/fs/fat/namei_vfat.c
deleted file mode 100644
index 98ae804f..00000000
--- a/ANDROID_3.4.5/fs/fat/namei_vfat.c
+++ /dev/null
@@ -1,1098 +0,0 @@
-/*
- *  linux/fs/vfat/namei.c
- *
- *  Written 1992,1993 by Werner Almesberger
- *
- *  Windows95/Windows NT compatible extended MSDOS filesystem
- *    by Gordon Chaffee Copyright (C) 1995.  Send bug reports for the
- *    VFAT filesystem to <chaffee@cs.berkeley.edu>.  Specify
- *    what file operation caused you trouble and if you can duplicate
- *    the problem, send a script that demonstrates it.
- *
- *  Short name translation 1999, 2001 by Wolfram Pienkoss <wp@bszh.de>
- *
- *  Support Multibyte characters and cleanup by
- *				OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
- */
-
-#include <linux/module.h>
-#include <linux/jiffies.h>
-#include <linux/ctype.h>
-#include <linux/slab.h>
-#include <linux/buffer_head.h>
-#include <linux/namei.h>
-#include "fat.h"
-
-/*
- * If new entry was created in the parent, it could create the 8.3
- * alias (the shortname of logname).  So, the parent may have the
- * negative-dentry which matches the created 8.3 alias.
- *
- * If it happened, the negative dentry isn't actually negative
- * anymore.  So, drop it.
- */
-static int vfat_revalidate_shortname(struct dentry *dentry)
-{
-	int ret = 1;
-	spin_lock(&dentry->d_lock);
-	if (dentry->d_time != dentry->d_parent->d_inode->i_version)
-		ret = 0;
-	spin_unlock(&dentry->d_lock);
-	return ret;
-}
-
-static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
-{
-	if (nd && nd->flags & LOOKUP_RCU)
-		return -ECHILD;
-
-	/* This is not negative dentry. Always valid. */
-	if (dentry->d_inode)
-		return 1;
-	return vfat_revalidate_shortname(dentry);
-}
-
-static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
-{
-	if (nd && nd->flags & LOOKUP_RCU)
-		return -ECHILD;
-
-	/*
-	 * This is not negative dentry. Always valid.
-	 *
-	 * Note, rename() to existing directory entry will have ->d_inode,
-	 * and will use existing name which isn't specified name by user.
-	 *
-	 * We may be able to drop this positive dentry here. But dropping
-	 * positive dentry isn't good idea. So it's unsupported like
-	 * rename("filename", "FILENAME") for now.
-	 */
-	if (dentry->d_inode)
-		return 1;
-
-	/*
-	 * This may be nfsd (or something), anyway, we can't see the
-	 * intent of this. So, since this can be for creation, drop it.
-	 */
-	if (!nd)
-		return 0;
-
-	/*
-	 * Drop the negative dentry, in order to make sure to use the
-	 * case sensitive name which is specified by user if this is
-	 * for creation.
-	 */
-	if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
-		return 0;
-
-	return vfat_revalidate_shortname(dentry);
-}
-
-/* returns the length of a struct qstr, ignoring trailing dots */
-static unsigned int __vfat_striptail_len(unsigned int len, const char *name)
-{
-	while (len && name[len - 1] == '.')
-		len--;
-	return len;
-}
-
-static unsigned int vfat_striptail_len(const struct qstr *qstr)
-{
-	return __vfat_striptail_len(qstr->len, qstr->name);
-}
-
-/*
- * Compute the hash for the vfat name corresponding to the dentry.
- * Note: if the name is invalid, we leave the hash code unchanged so
- * that the existing dentry can be used. The vfat fs routines will
- * return ENOENT or EINVAL as appropriate.
- */
-static int vfat_hash(const struct dentry *dentry, const struct inode *inode,
-		struct qstr *qstr)
-{
-	qstr->hash = full_name_hash(qstr->name, vfat_striptail_len(qstr));
-	return 0;
-}
-
-/*
- * Compute the hash for the vfat name corresponding to the dentry.
- * Note: if the name is invalid, we leave the hash code unchanged so
- * that the existing dentry can be used. The vfat fs routines will
- * return ENOENT or EINVAL as appropriate.
- */
-static int vfat_hashi(const struct dentry *dentry, const struct inode *inode,
-		struct qstr *qstr)
-{
-	struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
-	const unsigned char *name;
-	unsigned int len;
-	unsigned long hash;
-
-	name = qstr->name;
-	len = vfat_striptail_len(qstr);
-
-	hash = init_name_hash();
-	while (len--)
-		hash = partial_name_hash(nls_tolower(t, *name++), hash);
-	qstr->hash = end_name_hash(hash);
-
-	return 0;
-}
-
-/*
- * Case insensitive compare of two vfat names.
- */
-static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode,
-		const struct dentry *dentry, const struct inode *inode,
-		unsigned int len, const char *str, const struct qstr *name)
-{
-	struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io;
-	unsigned int alen, blen;
-
-	/* A filename cannot end in '.' or we treat it like it has none */
-	alen = vfat_striptail_len(name);
-	blen = __vfat_striptail_len(len, str);
-	if (alen == blen) {
-		if (nls_strnicmp(t, name->name, str, alen) == 0)
-			return 0;
-	}
-	return 1;
-}
-
-/*
- * Case sensitive compare of two vfat names.
- */
-static int vfat_cmp(const struct dentry *parent, const struct inode *pinode,
-		const struct dentry *dentry, const struct inode *inode,
-		unsigned int len, const char *str, const struct qstr *name)
-{
-	unsigned int alen, blen;
-
-	/* A filename cannot end in '.' or we treat it like it has none */
-	alen = vfat_striptail_len(name);
-	blen = __vfat_striptail_len(len, str);
-	if (alen == blen) {
-		if (strncmp(name->name, str, alen) == 0)
-			return 0;
-	}
-	return 1;
-}
-
-static const struct dentry_operations vfat_ci_dentry_ops = {
-	.d_revalidate	= vfat_revalidate_ci,
-	.d_hash		= vfat_hashi,
-	.d_compare	= vfat_cmpi,
-};
-
-static const struct dentry_operations vfat_dentry_ops = {
-	.d_revalidate	= vfat_revalidate,
-	.d_hash		= vfat_hash,
-	.d_compare	= vfat_cmp,
-};
-
-/* Characters that are undesirable in an MS-DOS file name */
-
-static inline wchar_t vfat_bad_char(wchar_t w)
-{
-	return (w < 0x0020)
-	    || (w == '*') || (w == '?') || (w == '<') || (w == '>')
-	    || (w == '|') || (w == '"') || (w == ':') || (w == '/')
-	    || (w == '\\');
-}
-
-static inline wchar_t vfat_replace_char(wchar_t w)
-{
-	return (w == '[') || (w == ']') || (w == ';') || (w == ',')
-	    || (w == '+') || (w == '=');
-}
-
-static wchar_t vfat_skip_char(wchar_t w)
-{
-	return (w == '.') || (w == ' ');
-}
-
-static inline int vfat_is_used_badchars(const wchar_t *s, int len)
-{
-	int i;
-
-	for (i = 0; i < len; i++)
-		if (vfat_bad_char(s[i]))
-			return -EINVAL;
-
-	if (s[i - 1] == ' ') /* last character cannot be space */
-		return -EINVAL;
-
-	return 0;
-}
-
-static int vfat_find_form(struct inode *dir, unsigned char *name)
-{
-	struct fat_slot_info sinfo;
-	int err = fat_scan(dir, name, &sinfo);
-	if (err)
-		return -ENOENT;
-	brelse(sinfo.bh);
-	return 0;
-}
-
-/*
- * 1) Valid characters for the 8.3 format alias are any combination of
- * letters, uppercase alphabets, digits, any of the
- * following special characters:
- *     $ % ' ` - @ { } ~ ! # ( ) & _ ^
- * In this case Longfilename is not stored in disk.
- *
- * WinNT's Extension:
- * File name and extension name is contain uppercase/lowercase
- * only. And it is expressed by CASE_LOWER_BASE and CASE_LOWER_EXT.
- *
- * 2) File name is 8.3 format, but it contain the uppercase and
- * lowercase char, muliti bytes char, etc. In this case numtail is not
- * added, but Longfilename is stored.
- *
- * 3) When the one except for the above, or the following special
- * character are contained:
- *        .   [ ] ; , + =
- * numtail is added, and Longfilename must be stored in disk .
- */
-struct shortname_info {
-	unsigned char lower:1,
-		      upper:1,
-		      valid:1;
-};
-#define INIT_SHORTNAME_INFO(x)	do {		\
-	(x)->lower = 1;				\
-	(x)->upper = 1;				\
-	(x)->valid = 1;				\
-} while (0)
-
-static inline int to_shortname_char(struct nls_table *nls,
-				    unsigned char *buf, int buf_size,
-				    wchar_t *src, struct shortname_info *info)
-{
-	int len;
-
-	if (vfat_skip_char(*src)) {
-		info->valid = 0;
-		return 0;
-	}
-	if (vfat_replace_char(*src)) {
-		info->valid = 0;
-		buf[0] = '_';
-		return 1;
-	}
-
-	len = nls->uni2char(*src, buf, buf_size);
-	if (len <= 0) {
-		info->valid = 0;
-		buf[0] = '_';
-		len = 1;
-	} else if (len == 1) {
-		unsigned char prev = buf[0];
-
-		if (buf[0] >= 0x7F) {
-			info->lower = 0;
-			info->upper = 0;
-		}
-
-		buf[0] = nls_toupper(nls, buf[0]);
-		if (isalpha(buf[0])) {
-			if (buf[0] == prev)
-				info->lower = 0;
-			else
-				info->upper = 0;
-		}
-	} else {
-		info->lower = 0;
-		info->upper = 0;
-	}
-
-	return len;
-}
-
-/*
- * Given a valid longname, create a unique shortname.  Make sure the
- * shortname does not exist
- * Returns negative number on error, 0 for a normal
- * return, and 1 for valid shortname
- */
-static int vfat_create_shortname(struct inode *dir, struct nls_table *nls,
-				 wchar_t *uname, int ulen,
-				 unsigned char *name_res, unsigned char *lcase)
-{
-	struct fat_mount_options *opts = &MSDOS_SB(dir->i_sb)->options;
-	wchar_t *ip, *ext_start, *end, *name_start;
-	unsigned char base[9], ext[4], buf[5], *p;
-	unsigned char charbuf[NLS_MAX_CHARSET_SIZE];
-	int chl, chi;
-	int sz = 0, extlen, baselen, i, numtail_baselen, numtail2_baselen;
-	int is_shortname;
-	struct shortname_info base_info, ext_info;
-
-	is_shortname = 1;
-	INIT_SHORTNAME_INFO(&base_info);
-	INIT_SHORTNAME_INFO(&ext_info);
-
-	/* Now, we need to create a shortname from the long name */
-	ext_start = end = &uname[ulen];
-	while (--ext_start >= uname) {
-		if (*ext_start == 0x002E) {	/* is `.' */
-			if (ext_start == end - 1) {
-				sz = ulen;
-				ext_start = NULL;
-			}
-			break;
-		}
-	}
-
-	if (ext_start == uname - 1) {
-		sz = ulen;
-		ext_start = NULL;
-	} else if (ext_start) {
-		/*
-		 * Names which start with a dot could be just
-		 * an extension eg. "...test".  In this case Win95
-		 * uses the extension as the name and sets no extension.
-		 */
-		name_start = &uname[0];
-		while (name_start < ext_start) {
-			if (!vfat_skip_char(*name_start))
-				break;
-			name_start++;
-		}
-		if (name_start != ext_start) {
-			sz = ext_start - uname;
-			ext_start++;
-		} else {
-			sz = ulen;
-			ext_start = NULL;
-		}
-	}
-
-	numtail_baselen = 6;
-	numtail2_baselen = 2;
-	for (baselen = i = 0, p = base, ip = uname; i < sz; i++, ip++) {
-		chl = to_shortname_char(nls, charbuf, sizeof(charbuf),
-					ip, &base_info);
-		if (chl == 0)
-			continue;
-
-		if (baselen < 2 && (baselen + chl) > 2)
-			numtail2_baselen = baselen;
-		if (baselen < 6 && (baselen + chl) > 6)
-			numtail_baselen = baselen;
-		for (chi = 0; chi < chl; chi++) {
-			*p++ = charbuf[chi];
-			baselen++;
-			if (baselen >= 8)
-				break;
-		}
-		if (baselen >= 8) {
-			if ((chi < chl - 1) || (ip + 1) - uname < sz)
-				is_shortname = 0;
-			break;
-		}
-	}
-	if (baselen == 0) {
-		return -EINVAL;
-	}
-
-	extlen = 0;
-	if (ext_start) {
-		for (p = ext, ip = ext_start; extlen < 3 && ip < end; ip++) {
-			chl = to_shortname_char(nls, charbuf, sizeof(charbuf),
-						ip, &ext_info);
-			if (chl == 0)
-				continue;
-
-			if ((extlen + chl) > 3) {
-				is_shortname = 0;
-				break;
-			}
-			for (chi = 0; chi < chl; chi++) {
-				*p++ = charbuf[chi];
-				extlen++;
-			}
-			if (extlen >= 3) {
-				if (ip + 1 != end)
-					is_shortname = 0;
-				break;
-			}
-		}
-	}
-	ext[extlen] = '\0';
-	base[baselen] = '\0';
-
-	/* Yes, it can happen. ".\xe5" would do it. */
-	if (base[0] == DELETED_FLAG)
-		base[0] = 0x05;
-
-	/* OK, at this point we know that base is not longer than 8 symbols,
-	 * ext is not longer than 3, base is nonempty, both don't contain
-	 * any bad symbols (lowercase transformed to uppercase).
-	 */
-
-	memset(name_res, ' ', MSDOS_NAME);
-	memcpy(name_res, base, baselen);
-	memcpy(name_res + 8, ext, extlen);
-	*lcase = 0;
-	if (is_shortname && base_info.valid && ext_info.valid) {
-		if (vfat_find_form(dir, name_res) == 0)
-			return -EEXIST;
-
-		if (opts->shortname & VFAT_SFN_CREATE_WIN95) {
-			return (base_info.upper && ext_info.upper);
-		} else if (opts->shortname & VFAT_SFN_CREATE_WINNT) {
-			if ((base_info.upper || base_info.lower) &&
-			    (ext_info.upper || ext_info.lower)) {
-				if (!base_info.upper && base_info.lower)
-					*lcase |= CASE_LOWER_BASE;
-				if (!ext_info.upper && ext_info.lower)
-					*lcase |= CASE_LOWER_EXT;
-				return 1;
-			}
-			return 0;
-		} else {
-			BUG();
-		}
-	}
-
-	if (opts->numtail == 0)
-		if (vfat_find_form(dir, name_res) < 0)
-			return 0;
-
-	/*
-	 * Try to find a unique extension.  This used to
-	 * iterate through all possibilities sequentially,
-	 * but that gave extremely bad performance.  Windows
-	 * only tries a few cases before using random
-	 * values for part of the base.
-	 */
-
-	if (baselen > 6) {
-		baselen = numtail_baselen;
-		name_res[7] = ' ';
-	}
-	name_res[baselen] = '~';
-	for (i = 1; i < 10; i++) {
-		name_res[baselen + 1] = i + '0';
-		if (vfat_find_form(dir, name_res) < 0)
-			return 0;
-	}
-
-	i = jiffies;
-	sz = (jiffies >> 16) & 0x7;
-	if (baselen > 2) {
-		baselen = numtail2_baselen;
-		name_res[7] = ' ';
-	}
-	name_res[baselen + 4] = '~';
-	name_res[baselen + 5] = '1' + sz;
-	while (1) {
-		snprintf(buf, sizeof(buf), "%04X", i & 0xffff);
-		memcpy(&name_res[baselen], buf, 4);
-		if (vfat_find_form(dir, name_res) < 0)
-			break;
-		i -= 11;
-	}
-	return 0;
-}
-
-/* Translate a string, including coded sequences into Unicode */
-static int
-xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,
-	     int *longlen, int *outlen, int escape, int utf8,
-	     struct nls_table *nls)
-{
-	const unsigned char *ip;
-	unsigned char nc;
-	unsigned char *op;
-	unsigned int ec;
-	int i, k, fill;
-	int charlen;
-
-	if (utf8) {
-		*outlen = utf8s_to_utf16s(name, len, UTF16_HOST_ENDIAN,
-				(wchar_t *) outname, FAT_LFN_LEN + 2);
-		if (*outlen < 0)
-			return *outlen;
-		else if (*outlen > FAT_LFN_LEN)
-			return -ENAMETOOLONG;
-
-		op = &outname[*outlen * sizeof(wchar_t)];
-	} else {
-		for (i = 0, ip = name, op = outname, *outlen = 0;
-			 i < len && *outlen < FAT_LFN_LEN;
-			 *outlen += 1) {
-			if (escape && (*ip == ':')) {
-				if (i > len - 5)
-					return -EINVAL;
-				ec = 0;
-				for (k = 1; k < 5; k++) {
-					nc = ip[k];
-					ec <<= 4;
-					if (nc >= '0' && nc <= '9') {
-						ec |= nc - '0';
-						continue;
-					}
-					if (nc >= 'a' && nc <= 'f') {
-						ec |= nc - ('a' - 10);
-						continue;
-					}
-					if (nc >= 'A' && nc <= 'F') {
-						ec |= nc - ('A' - 10);
-						continue;
-					}
-					return -EINVAL;
-				}
-				*op++ = ec & 0xFF;
-				*op++ = ec >> 8;
-				ip += 5;
-				i += 5;
-			} else {
-				charlen = nls->char2uni(ip, len - i,
-									(wchar_t *)op);
-				if (charlen < 0)
-					return -EINVAL;
-				ip += charlen;
-				i += charlen;
-				op += 2;
-			}
-		}
-		if (i < len)
-			return -ENAMETOOLONG;
-	}
-
-	*longlen = *outlen;
-	if (*outlen % 13) {
-		*op++ = 0;
-		*op++ = 0;
-		*outlen += 1;
-		if (*outlen % 13) {
-			fill = 13 - (*outlen % 13);
-			for (i = 0; i < fill; i++) {
-				*op++ = 0xff;
-				*op++ = 0xff;
-			}
-			*outlen += fill;
-		}
-	}
-
-	return 0;
-}
-
-static int vfat_build_slots(struct inode *dir, const unsigned char *name,
-			    int len, int is_dir, int cluster,
-			    struct timespec *ts,
-			    struct msdos_dir_slot *slots, int *nr_slots)
-{
-	struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb);
-	struct fat_mount_options *opts = &sbi->options;
-	struct msdos_dir_slot *ps;
-	struct msdos_dir_entry *de;
-	unsigned char cksum, lcase;
-	unsigned char msdos_name[MSDOS_NAME];
-	wchar_t *uname;
-	__le16 time, date;
-	u8 time_cs;
-	int err, ulen, usize, i;
-	loff_t offset;
-
-	*nr_slots = 0;
-
-	uname = __getname();
-	if (!uname)
-		return -ENOMEM;
-
-	err = xlate_to_uni(name, len, (unsigned char *)uname, &ulen, &usize,
-			   opts->unicode_xlate, opts->utf8, sbi->nls_io);
-	if (err)
-		goto out_free;
-
-	err = vfat_is_used_badchars(uname, ulen);
-	if (err)
-		goto out_free;
-
-	err = vfat_create_shortname(dir, sbi->nls_disk, uname, ulen,
-				    msdos_name, &lcase);
-	if (err < 0)
-		goto out_free;
-	else if (err == 1) {
-		de = (struct msdos_dir_entry *)slots;
-		err = 0;
-		goto shortname;
-	}
-
-	/* build the entry of long file name */
-	cksum = fat_checksum(msdos_name);
-
-	*nr_slots = usize / 13;
-	for (ps = slots, i = *nr_slots; i > 0; i--, ps++) {
-		ps->id = i;
-		ps->attr = ATTR_EXT;
-		ps->reserved = 0;
-		ps->alias_checksum = cksum;
-		ps->start = 0;
-		offset = (i - 1) * 13;
-		fatwchar_to16(ps->name0_4, uname + offset, 5);
-		fatwchar_to16(ps->name5_10, uname + offset + 5, 6);
-		fatwchar_to16(ps->name11_12, uname + offset + 11, 2);
-	}
-	slots[0].id |= 0x40;
-	de = (struct msdos_dir_entry *)ps;
-
-shortname:
-	/* build the entry of 8.3 alias name */
-	(*nr_slots)++;
-	memcpy(de->name, msdos_name, MSDOS_NAME);
-	de->attr = is_dir ? ATTR_DIR : ATTR_ARCH;
-	de->lcase = lcase;
-	fat_time_unix2fat(sbi, ts, &time, &date, &time_cs);
-	de->time = de->ctime = time;
-	de->date = de->cdate = de->adate = date;
-	de->ctime_cs = time_cs;
-	de->start = cpu_to_le16(cluster);
-	de->starthi = cpu_to_le16(cluster >> 16);
-	de->size = 0;
-out_free:
-	__putname(uname);
-	return err;
-}
-
-static int vfat_add_entry(struct inode *dir, struct qstr *qname, int is_dir,
-			  int cluster, struct timespec *ts,
-			  struct fat_slot_info *sinfo)
-{
-	struct msdos_dir_slot *slots;
-	unsigned int len;
-	int err, nr_slots;
-
-	len = vfat_striptail_len(qname);
-	if (len == 0)
-		return -ENOENT;
-
-	slots = kmalloc(sizeof(*slots) * MSDOS_SLOTS, GFP_NOFS);
-	if (slots == NULL)
-		return -ENOMEM;
-
-	err = vfat_build_slots(dir, qname->name, len, is_dir, cluster, ts,
-			       slots, &nr_slots);
-	if (err)
-		goto cleanup;
-
-	err = fat_add_entries(dir, slots, nr_slots, sinfo);
-	if (err)
-		goto cleanup;
-
-	/* update timestamp */
-	dir->i_ctime = dir->i_mtime = dir->i_atime = *ts;
-	if (IS_DIRSYNC(dir))
-		(void)fat_sync_inode(dir);
-	else
-		mark_inode_dirty(dir);
-cleanup:
-	kfree(slots);
-	return err;
-}
-
-static int vfat_find(struct inode *dir, struct qstr *qname,
-		     struct fat_slot_info *sinfo)
-{
-	unsigned int len = vfat_striptail_len(qname);
-	if (len == 0)
-		return -ENOENT;
-	return fat_search_long(dir, qname->name, len, sinfo);
-}
-
-/*
- * (nfsd's) anonymous disconnected dentry?
- * NOTE: !IS_ROOT() is not anonymous (I.e. d_splice_alias() did the job).
- */
-static int vfat_d_anon_disconn(struct dentry *dentry)
-{
-	return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED);
-}
-
-static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry,
-				  struct nameidata *nd)
-{
-	struct super_block *sb = dir->i_sb;
-	struct fat_slot_info sinfo;
-	struct inode *inode;
-	struct dentry *alias;
-	int err;
-
-	lock_super(sb);
-
-	err = vfat_find(dir, &dentry->d_name, &sinfo);
-	if (err) {
-		if (err == -ENOENT) {
-			inode = NULL;
-			goto out;
-		}
-		goto error;
-	}
-
-	inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
-	brelse(sinfo.bh);
-	if (IS_ERR(inode)) {
-		err = PTR_ERR(inode);
-		goto error;
-	}
-
-	alias = d_find_alias(inode);
-	if (alias && !vfat_d_anon_disconn(alias)) {
-		/*
-		 * This inode has non anonymous-DCACHE_DISCONNECTED
-		 * dentry. This means, the user did ->lookup() by an
-		 * another name (longname vs 8.3 alias of it) in past.
-		 *
-		 * Switch to new one for reason of locality if possible.
-		 */
-		BUG_ON(d_unhashed(alias));
-		if (!S_ISDIR(inode->i_mode))
-			d_move(alias, dentry);
-		iput(inode);
-		unlock_super(sb);
-		return alias;
-	} else
-		dput(alias);
-
-out:
-	unlock_super(sb);
-	dentry->d_time = dentry->d_parent->d_inode->i_version;
-	dentry = d_splice_alias(inode, dentry);
-	if (dentry)
-		dentry->d_time = dentry->d_parent->d_inode->i_version;
-	return dentry;
-
-error:
-	unlock_super(sb);
-	return ERR_PTR(err);
-}
-
-static int vfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-		       struct nameidata *nd)
-{
-	struct super_block *sb = dir->i_sb;
-	struct inode *inode;
-	struct fat_slot_info sinfo;
-	struct timespec ts;
-	int err;
-
-	lock_super(sb);
-
-	ts = CURRENT_TIME_SEC;
-	err = vfat_add_entry(dir, &dentry->d_name, 0, 0, &ts, &sinfo);
-	if (err)
-		goto out;
-	dir->i_version++;
-
-	inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
-	brelse(sinfo.bh);
-	if (IS_ERR(inode)) {
-		err = PTR_ERR(inode);
-		goto out;
-	}
-	inode->i_version++;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
-	/* timestamp is already written, so mark_inode_dirty() is unneeded. */
-
-	dentry->d_time = dentry->d_parent->d_inode->i_version;
-	d_instantiate(dentry, inode);
-out:
-	unlock_super(sb);
-	return err;
-}
-
-static int vfat_rmdir(struct inode *dir, struct dentry *dentry)
-{
-	struct inode *inode = dentry->d_inode;
-	struct super_block *sb = dir->i_sb;
-	struct fat_slot_info sinfo;
-	int err;
-
-	lock_super(sb);
-
-	err = fat_dir_empty(inode);
-	if (err)
-		goto out;
-	err = vfat_find(dir, &dentry->d_name, &sinfo);
-	if (err)
-		goto out;
-
-	err = fat_remove_entries(dir, &sinfo);	/* and releases bh */
-	if (err)
-		goto out;
-	drop_nlink(dir);
-
-	clear_nlink(inode);
-	inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
-	fat_detach(inode);
-out:
-	unlock_super(sb);
-
-	return err;
-}
-
-static int vfat_unlink(struct inode *dir, struct dentry *dentry)
-{
-	struct inode *inode = dentry->d_inode;
-	struct super_block *sb = dir->i_sb;
-	struct fat_slot_info sinfo;
-	int err;
-
-	lock_super(sb);
-
-	err = vfat_find(dir, &dentry->d_name, &sinfo);
-	if (err)
-		goto out;
-
-	err = fat_remove_entries(dir, &sinfo);	/* and releases bh */
-	if (err)
-		goto out;
-	clear_nlink(inode);
-	inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
-	fat_detach(inode);
-out:
-	unlock_super(sb);
-
-	return err;
-}
-
-static int vfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-{
-	struct super_block *sb = dir->i_sb;
-	struct inode *inode;
-	struct fat_slot_info sinfo;
-	struct timespec ts;
-	int err, cluster;
-
-	lock_super(sb);
-
-	ts = CURRENT_TIME_SEC;
-	cluster = fat_alloc_new_dir(dir, &ts);
-	if (cluster < 0) {
-		err = cluster;
-		goto out;
-	}
-	err = vfat_add_entry(dir, &dentry->d_name, 1, cluster, &ts, &sinfo);
-	if (err)
-		goto out_free;
-	dir->i_version++;
-	inc_nlink(dir);
-
-	inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
-	brelse(sinfo.bh);
-	if (IS_ERR(inode)) {
-		err = PTR_ERR(inode);
-		/* the directory was completed, just return a error */
-		goto out;
-	}
-	inode->i_version++;
-	set_nlink(inode, 2);
-	inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
-	/* timestamp is already written, so mark_inode_dirty() is unneeded. */
-
-	dentry->d_time = dentry->d_parent->d_inode->i_version;
-	d_instantiate(dentry, inode);
-
-	unlock_super(sb);
-	return 0;
-
-out_free:
-	fat_free_clusters(dir, cluster);
-out:
-	unlock_super(sb);
-	return err;
-}
-
-static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
-		       struct inode *new_dir, struct dentry *new_dentry)
-{
-	struct buffer_head *dotdot_bh;
-	struct msdos_dir_entry *dotdot_de;
-	struct inode *old_inode, *new_inode;
-	struct fat_slot_info old_sinfo, sinfo;
-	struct timespec ts;
-	loff_t dotdot_i_pos, new_i_pos;
-	int err, is_dir, update_dotdot, corrupt = 0;
-	struct super_block *sb = old_dir->i_sb;
-
-	old_sinfo.bh = sinfo.bh = dotdot_bh = NULL;
-	old_inode = old_dentry->d_inode;
-	new_inode = new_dentry->d_inode;
-	lock_super(sb);
-	err = vfat_find(old_dir, &old_dentry->d_name, &old_sinfo);
-	if (err)
-		goto out;
-
-	is_dir = S_ISDIR(old_inode->i_mode);
-	update_dotdot = (is_dir && old_dir != new_dir);
-	if (update_dotdot) {
-		if (fat_get_dotdot_entry(old_inode, &dotdot_bh, &dotdot_de,
-					 &dotdot_i_pos) < 0) {
-			err = -EIO;
-			goto out;
-		}
-	}
-
-	ts = CURRENT_TIME_SEC;
-	if (new_inode) {
-		if (is_dir) {
-			err = fat_dir_empty(new_inode);
-			if (err)
-				goto out;
-		}
-		new_i_pos = MSDOS_I(new_inode)->i_pos;
-		fat_detach(new_inode);
-	} else {
-		err = vfat_add_entry(new_dir, &new_dentry->d_name, is_dir, 0,
-				     &ts, &sinfo);
-		if (err)
-			goto out;
-		new_i_pos = sinfo.i_pos;
-	}
-	new_dir->i_version++;
-
-	fat_detach(old_inode);
-	fat_attach(old_inode, new_i_pos);
-	if (IS_DIRSYNC(new_dir)) {
-		err = fat_sync_inode(old_inode);
-		if (err)
-			goto error_inode;
-	} else
-		mark_inode_dirty(old_inode);
-
-	if (update_dotdot) {
-		int start = MSDOS_I(new_dir)->i_logstart;
-		dotdot_de->start = cpu_to_le16(start);
-		dotdot_de->starthi = cpu_to_le16(start >> 16);
-		mark_buffer_dirty_inode(dotdot_bh, old_inode);
-		if (IS_DIRSYNC(new_dir)) {
-			err = sync_dirty_buffer(dotdot_bh);
-			if (err)
-				goto error_dotdot;
-		}
-		drop_nlink(old_dir);
-		if (!new_inode)
- 			inc_nlink(new_dir);
-	}
-
-	err = fat_remove_entries(old_dir, &old_sinfo);	/* and releases bh */
-	old_sinfo.bh = NULL;
-	if (err)
-		goto error_dotdot;
-	old_dir->i_version++;
-	old_dir->i_ctime = old_dir->i_mtime = ts;
-	if (IS_DIRSYNC(old_dir))
-		(void)fat_sync_inode(old_dir);
-	else
-		mark_inode_dirty(old_dir);
-
-	if (new_inode) {
-		drop_nlink(new_inode);
-		if (is_dir)
-			drop_nlink(new_inode);
-		new_inode->i_ctime = ts;
-	}
-out:
-	brelse(sinfo.bh);
-	brelse(dotdot_bh);
-	brelse(old_sinfo.bh);
-	unlock_super(sb);
-
-	return err;
-
-error_dotdot:
-	/* data cluster is shared, serious corruption */
-	corrupt = 1;
-
-	if (update_dotdot) {
-		int start = MSDOS_I(old_dir)->i_logstart;
-		dotdot_de->start = cpu_to_le16(start);
-		dotdot_de->starthi = cpu_to_le16(start >> 16);
-		mark_buffer_dirty_inode(dotdot_bh, old_inode);
-		corrupt |= sync_dirty_buffer(dotdot_bh);
-	}
-error_inode:
-	fat_detach(old_inode);
-	fat_attach(old_inode, old_sinfo.i_pos);
-	if (new_inode) {
-		fat_attach(new_inode, new_i_pos);
-		if (corrupt)
-			corrupt |= fat_sync_inode(new_inode);
-	} else {
-		/*
-		 * If new entry was not sharing the data cluster, it
-		 * shouldn't be serious corruption.
-		 */
-		int err2 = fat_remove_entries(new_dir, &sinfo);
-		if (corrupt)
-			corrupt |= err2;
-		sinfo.bh = NULL;
-	}
-	if (corrupt < 0) {
-		fat_fs_error(new_dir->i_sb,
-			     "%s: Filesystem corrupted (i_pos %lld)",
-			     __func__, sinfo.i_pos);
-	}
-	goto out;
-}
-
-static const struct inode_operations vfat_dir_inode_operations = {
-	.create		= vfat_create,
-	.lookup		= vfat_lookup,
-	.unlink		= vfat_unlink,
-	.mkdir		= vfat_mkdir,
-	.rmdir		= vfat_rmdir,
-	.rename		= vfat_rename,
-	.setattr	= fat_setattr,
-	.getattr	= fat_getattr,
-};
-
-static void setup(struct super_block *sb)
-{
-	MSDOS_SB(sb)->dir_ops = &vfat_dir_inode_operations;
-	if (MSDOS_SB(sb)->options.name_check != 's')
-		sb->s_d_op = &vfat_ci_dentry_ops;
-	else
-		sb->s_d_op = &vfat_dentry_ops;
-}
-
-static int vfat_fill_super(struct super_block *sb, void *data, int silent)
-{
-	return fat_fill_super(sb, data, silent, 1, setup);
-}
-
-static struct dentry *vfat_mount(struct file_system_type *fs_type,
-		       int flags, const char *dev_name,
-		       void *data)
-{
-	return mount_bdev(fs_type, flags, dev_name, data, vfat_fill_super);
-}
-
-static struct file_system_type vfat_fs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "vfat",
-	.mount		= vfat_mount,
-	.kill_sb	= kill_block_super,
-	.fs_flags	= FS_REQUIRES_DEV,
-};
-
-static int __init init_vfat_fs(void)
-{
-	return register_filesystem(&vfat_fs_type);
-}
-
-static void __exit exit_vfat_fs(void)
-{
-	unregister_filesystem(&vfat_fs_type);
-}
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("VFAT filesystem support");
-MODULE_AUTHOR("Gordon Chaffee");
-
-module_init(init_vfat_fs)
-module_exit(exit_vfat_fs)