mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:46:40 +07:00
4acdaf27eb
vfs_create() ignores everything outside of 16bit subset of its mode argument; switching it to umode_t is obviously equivalent and it's the only caller of the method Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
694 lines
17 KiB
C
694 lines
17 KiB
C
/*
|
|
* linux/fs/msdos/namei.c
|
|
*
|
|
* Written 1992,1993 by Werner Almesberger
|
|
* Hidden files 1995 by Albert Cahalan <albert@ccs.neu.edu> <adc@coe.neu.edu>
|
|
* Rewritten for constant inumbers 1999 by Al Viro
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/time.h>
|
|
#include <linux/buffer_head.h>
|
|
#include "fat.h"
|
|
|
|
/* Characters that are undesirable in an MS-DOS file name */
|
|
static unsigned char bad_chars[] = "*?<>|\"";
|
|
static unsigned char bad_if_strict[] = "+=,; ";
|
|
|
|
/***** Formats an MS-DOS file name. Rejects invalid names. */
|
|
static int msdos_format_name(const unsigned char *name, int len,
|
|
unsigned char *res, struct fat_mount_options *opts)
|
|
/*
|
|
* name is the proposed name, len is its length, res is
|
|
* the resulting name, opts->name_check is either (r)elaxed,
|
|
* (n)ormal or (s)trict, opts->dotsOK allows dots at the
|
|
* beginning of name (for hidden files)
|
|
*/
|
|
{
|
|
unsigned char *walk;
|
|
unsigned char c;
|
|
int space;
|
|
|
|
if (name[0] == '.') { /* dotfile because . and .. already done */
|
|
if (opts->dotsOK) {
|
|
/* Get rid of dot - test for it elsewhere */
|
|
name++;
|
|
len--;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* disallow names that _really_ start with a dot
|
|
*/
|
|
space = 1;
|
|
c = 0;
|
|
for (walk = res; len && walk - res < 8; walk++) {
|
|
c = *name++;
|
|
len--;
|
|
if (opts->name_check != 'r' && strchr(bad_chars, c))
|
|
return -EINVAL;
|
|
if (opts->name_check == 's' && strchr(bad_if_strict, c))
|
|
return -EINVAL;
|
|
if (c >= 'A' && c <= 'Z' && opts->name_check == 's')
|
|
return -EINVAL;
|
|
if (c < ' ' || c == ':' || c == '\\')
|
|
return -EINVAL;
|
|
/*
|
|
* 0xE5 is legal as a first character, but we must substitute
|
|
* 0x05 because 0xE5 marks deleted files. Yes, DOS really
|
|
* does this.
|
|
* It seems that Microsoft hacked DOS to support non-US
|
|
* characters after the 0xE5 character was already in use to
|
|
* mark deleted files.
|
|
*/
|
|
if ((res == walk) && (c == 0xE5))
|
|
c = 0x05;
|
|
if (c == '.')
|
|
break;
|
|
space = (c == ' ');
|
|
*walk = (!opts->nocase && c >= 'a' && c <= 'z') ? c - 32 : c;
|
|
}
|
|
if (space)
|
|
return -EINVAL;
|
|
if (opts->name_check == 's' && len && c != '.') {
|
|
c = *name++;
|
|
len--;
|
|
if (c != '.')
|
|
return -EINVAL;
|
|
}
|
|
while (c != '.' && len--)
|
|
c = *name++;
|
|
if (c == '.') {
|
|
while (walk - res < 8)
|
|
*walk++ = ' ';
|
|
while (len > 0 && walk - res < MSDOS_NAME) {
|
|
c = *name++;
|
|
len--;
|
|
if (opts->name_check != 'r' && strchr(bad_chars, c))
|
|
return -EINVAL;
|
|
if (opts->name_check == 's' &&
|
|
strchr(bad_if_strict, c))
|
|
return -EINVAL;
|
|
if (c < ' ' || c == ':' || c == '\\')
|
|
return -EINVAL;
|
|
if (c == '.') {
|
|
if (opts->name_check == 's')
|
|
return -EINVAL;
|
|
break;
|
|
}
|
|
if (c >= 'A' && c <= 'Z' && opts->name_check == 's')
|
|
return -EINVAL;
|
|
space = c == ' ';
|
|
if (!opts->nocase && c >= 'a' && c <= 'z')
|
|
*walk++ = c - 32;
|
|
else
|
|
*walk++ = c;
|
|
}
|
|
if (space)
|
|
return -EINVAL;
|
|
if (opts->name_check == 's' && len)
|
|
return -EINVAL;
|
|
}
|
|
while (walk - res < MSDOS_NAME)
|
|
*walk++ = ' ';
|
|
|
|
return 0;
|
|
}
|
|
|
|
/***** Locates a directory entry. Uses unformatted name. */
|
|
static int msdos_find(struct inode *dir, const unsigned char *name, int len,
|
|
struct fat_slot_info *sinfo)
|
|
{
|
|
struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb);
|
|
unsigned char msdos_name[MSDOS_NAME];
|
|
int err;
|
|
|
|
err = msdos_format_name(name, len, msdos_name, &sbi->options);
|
|
if (err)
|
|
return -ENOENT;
|
|
|
|
err = fat_scan(dir, msdos_name, sinfo);
|
|
if (!err && sbi->options.dotsOK) {
|
|
if (name[0] == '.') {
|
|
if (!(sinfo->de->attr & ATTR_HIDDEN))
|
|
err = -ENOENT;
|
|
} else {
|
|
if (sinfo->de->attr & ATTR_HIDDEN)
|
|
err = -ENOENT;
|
|
}
|
|
if (err)
|
|
brelse(sinfo->bh);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Compute the hash for the msdos 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 msdos fs routines will
|
|
* return ENOENT or EINVAL as appropriate.
|
|
*/
|
|
static int msdos_hash(const struct dentry *dentry, const struct inode *inode,
|
|
struct qstr *qstr)
|
|
{
|
|
struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options;
|
|
unsigned char msdos_name[MSDOS_NAME];
|
|
int error;
|
|
|
|
error = msdos_format_name(qstr->name, qstr->len, msdos_name, options);
|
|
if (!error)
|
|
qstr->hash = full_name_hash(msdos_name, MSDOS_NAME);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Compare two msdos names. If either of the names are invalid,
|
|
* we fall back to doing the standard name comparison.
|
|
*/
|
|
static int msdos_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)
|
|
{
|
|
struct fat_mount_options *options = &MSDOS_SB(parent->d_sb)->options;
|
|
unsigned char a_msdos_name[MSDOS_NAME], b_msdos_name[MSDOS_NAME];
|
|
int error;
|
|
|
|
error = msdos_format_name(name->name, name->len, a_msdos_name, options);
|
|
if (error)
|
|
goto old_compare;
|
|
error = msdos_format_name(str, len, b_msdos_name, options);
|
|
if (error)
|
|
goto old_compare;
|
|
error = memcmp(a_msdos_name, b_msdos_name, MSDOS_NAME);
|
|
out:
|
|
return error;
|
|
|
|
old_compare:
|
|
error = 1;
|
|
if (name->len == len)
|
|
error = memcmp(name->name, str, len);
|
|
goto out;
|
|
}
|
|
|
|
static const struct dentry_operations msdos_dentry_operations = {
|
|
.d_hash = msdos_hash,
|
|
.d_compare = msdos_cmp,
|
|
};
|
|
|
|
/*
|
|
* AV. Wrappers for FAT sb operations. Is it wise?
|
|
*/
|
|
|
|
/***** Get inode using directory and name */
|
|
static struct dentry *msdos_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;
|
|
int err;
|
|
|
|
lock_super(sb);
|
|
err = msdos_find(dir, dentry->d_name.name, dentry->d_name.len, &sinfo);
|
|
switch (err) {
|
|
case -ENOENT:
|
|
inode = NULL;
|
|
break;
|
|
case 0:
|
|
inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
|
|
brelse(sinfo.bh);
|
|
break;
|
|
default:
|
|
inode = ERR_PTR(err);
|
|
}
|
|
unlock_super(sb);
|
|
return d_splice_alias(inode, dentry);
|
|
}
|
|
|
|
/***** Creates a directory entry (name is already formatted). */
|
|
static int msdos_add_entry(struct inode *dir, const unsigned char *name,
|
|
int is_dir, int is_hid, int cluster,
|
|
struct timespec *ts, struct fat_slot_info *sinfo)
|
|
{
|
|
struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb);
|
|
struct msdos_dir_entry de;
|
|
__le16 time, date;
|
|
int err;
|
|
|
|
memcpy(de.name, name, MSDOS_NAME);
|
|
de.attr = is_dir ? ATTR_DIR : ATTR_ARCH;
|
|
if (is_hid)
|
|
de.attr |= ATTR_HIDDEN;
|
|
de.lcase = 0;
|
|
fat_time_unix2fat(sbi, ts, &time, &date, NULL);
|
|
de.cdate = de.adate = 0;
|
|
de.ctime = 0;
|
|
de.ctime_cs = 0;
|
|
de.time = time;
|
|
de.date = date;
|
|
de.start = cpu_to_le16(cluster);
|
|
de.starthi = cpu_to_le16(cluster >> 16);
|
|
de.size = 0;
|
|
|
|
err = fat_add_entries(dir, &de, 1, sinfo);
|
|
if (err)
|
|
return err;
|
|
|
|
dir->i_ctime = dir->i_mtime = *ts;
|
|
if (IS_DIRSYNC(dir))
|
|
(void)fat_sync_inode(dir);
|
|
else
|
|
mark_inode_dirty(dir);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/***** Create a file */
|
|
static int msdos_create(struct inode *dir, struct dentry *dentry, umode_t mode,
|
|
struct nameidata *nd)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct inode *inode = NULL;
|
|
struct fat_slot_info sinfo;
|
|
struct timespec ts;
|
|
unsigned char msdos_name[MSDOS_NAME];
|
|
int err, is_hid;
|
|
|
|
lock_super(sb);
|
|
|
|
err = msdos_format_name(dentry->d_name.name, dentry->d_name.len,
|
|
msdos_name, &MSDOS_SB(sb)->options);
|
|
if (err)
|
|
goto out;
|
|
is_hid = (dentry->d_name.name[0] == '.') && (msdos_name[0] != '.');
|
|
/* Have to do it due to foo vs. .foo conflicts */
|
|
if (!fat_scan(dir, msdos_name, &sinfo)) {
|
|
brelse(sinfo.bh);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ts = CURRENT_TIME_SEC;
|
|
err = msdos_add_entry(dir, msdos_name, 0, is_hid, 0, &ts, &sinfo);
|
|
if (err)
|
|
goto out;
|
|
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_mtime = inode->i_atime = inode->i_ctime = ts;
|
|
/* timestamp is already written, so mark_inode_dirty() is unneeded. */
|
|
|
|
d_instantiate(dentry, inode);
|
|
out:
|
|
unlock_super(sb);
|
|
if (!err)
|
|
err = fat_flush_inodes(sb, dir, inode);
|
|
return err;
|
|
}
|
|
|
|
/***** Remove a directory */
|
|
static int msdos_rmdir(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct fat_slot_info sinfo;
|
|
int err;
|
|
|
|
lock_super(sb);
|
|
/*
|
|
* Check whether the directory is not in use, then check
|
|
* whether it is empty.
|
|
*/
|
|
err = fat_dir_empty(inode);
|
|
if (err)
|
|
goto out;
|
|
err = msdos_find(dir, dentry->d_name.name, dentry->d_name.len, &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_ctime = CURRENT_TIME_SEC;
|
|
fat_detach(inode);
|
|
out:
|
|
unlock_super(sb);
|
|
if (!err)
|
|
err = fat_flush_inodes(sb, dir, inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/***** Make a directory */
|
|
static int msdos_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct fat_slot_info sinfo;
|
|
struct inode *inode;
|
|
unsigned char msdos_name[MSDOS_NAME];
|
|
struct timespec ts;
|
|
int err, is_hid, cluster;
|
|
|
|
lock_super(sb);
|
|
|
|
err = msdos_format_name(dentry->d_name.name, dentry->d_name.len,
|
|
msdos_name, &MSDOS_SB(sb)->options);
|
|
if (err)
|
|
goto out;
|
|
is_hid = (dentry->d_name.name[0] == '.') && (msdos_name[0] != '.');
|
|
/* foo vs .foo situation */
|
|
if (!fat_scan(dir, msdos_name, &sinfo)) {
|
|
brelse(sinfo.bh);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ts = CURRENT_TIME_SEC;
|
|
cluster = fat_alloc_new_dir(dir, &ts);
|
|
if (cluster < 0) {
|
|
err = cluster;
|
|
goto out;
|
|
}
|
|
err = msdos_add_entry(dir, msdos_name, 1, is_hid, cluster, &ts, &sinfo);
|
|
if (err)
|
|
goto out_free;
|
|
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;
|
|
}
|
|
set_nlink(inode, 2);
|
|
inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
|
|
/* timestamp is already written, so mark_inode_dirty() is unneeded. */
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
unlock_super(sb);
|
|
fat_flush_inodes(sb, dir, inode);
|
|
return 0;
|
|
|
|
out_free:
|
|
fat_free_clusters(dir, cluster);
|
|
out:
|
|
unlock_super(sb);
|
|
return err;
|
|
}
|
|
|
|
/***** Unlink a file */
|
|
static int msdos_unlink(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct super_block *sb= inode->i_sb;
|
|
struct fat_slot_info sinfo;
|
|
int err;
|
|
|
|
lock_super(sb);
|
|
err = msdos_find(dir, dentry->d_name.name, dentry->d_name.len, &sinfo);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = fat_remove_entries(dir, &sinfo); /* and releases bh */
|
|
if (err)
|
|
goto out;
|
|
clear_nlink(inode);
|
|
inode->i_ctime = CURRENT_TIME_SEC;
|
|
fat_detach(inode);
|
|
out:
|
|
unlock_super(sb);
|
|
if (!err)
|
|
err = fat_flush_inodes(sb, dir, inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name,
|
|
struct dentry *old_dentry,
|
|
struct inode *new_dir, unsigned char *new_name,
|
|
struct dentry *new_dentry, int is_hid)
|
|
{
|
|
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, old_attrs, is_dir, update_dotdot, corrupt = 0;
|
|
|
|
old_sinfo.bh = sinfo.bh = dotdot_bh = NULL;
|
|
old_inode = old_dentry->d_inode;
|
|
new_inode = new_dentry->d_inode;
|
|
|
|
err = fat_scan(old_dir, old_name, &old_sinfo);
|
|
if (err) {
|
|
err = -EIO;
|
|
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;
|
|
}
|
|
}
|
|
|
|
old_attrs = MSDOS_I(old_inode)->i_attrs;
|
|
err = fat_scan(new_dir, new_name, &sinfo);
|
|
if (!err) {
|
|
if (!new_inode) {
|
|
/* "foo" -> ".foo" case. just change the ATTR_HIDDEN */
|
|
if (sinfo.de != old_sinfo.de) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (is_hid)
|
|
MSDOS_I(old_inode)->i_attrs |= ATTR_HIDDEN;
|
|
else
|
|
MSDOS_I(old_inode)->i_attrs &= ~ATTR_HIDDEN;
|
|
if (IS_DIRSYNC(old_dir)) {
|
|
err = fat_sync_inode(old_inode);
|
|
if (err) {
|
|
MSDOS_I(old_inode)->i_attrs = old_attrs;
|
|
goto out;
|
|
}
|
|
} else
|
|
mark_inode_dirty(old_inode);
|
|
|
|
old_dir->i_version++;
|
|
old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME_SEC;
|
|
if (IS_DIRSYNC(old_dir))
|
|
(void)fat_sync_inode(old_dir);
|
|
else
|
|
mark_inode_dirty(old_dir);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ts = CURRENT_TIME_SEC;
|
|
if (new_inode) {
|
|
if (err)
|
|
goto out;
|
|
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 = msdos_add_entry(new_dir, new_name, is_dir, is_hid, 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_hid)
|
|
MSDOS_I(old_inode)->i_attrs |= ATTR_HIDDEN;
|
|
else
|
|
MSDOS_I(old_inode)->i_attrs &= ~ATTR_HIDDEN;
|
|
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);
|
|
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);
|
|
MSDOS_I(old_inode)->i_attrs = old_attrs;
|
|
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;
|
|
}
|
|
|
|
/***** Rename, a wrapper for rename_same_dir & rename_diff_dir */
|
|
static int msdos_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|
struct inode *new_dir, struct dentry *new_dentry)
|
|
{
|
|
struct super_block *sb = old_dir->i_sb;
|
|
unsigned char old_msdos_name[MSDOS_NAME], new_msdos_name[MSDOS_NAME];
|
|
int err, is_hid;
|
|
|
|
lock_super(sb);
|
|
|
|
err = msdos_format_name(old_dentry->d_name.name,
|
|
old_dentry->d_name.len, old_msdos_name,
|
|
&MSDOS_SB(old_dir->i_sb)->options);
|
|
if (err)
|
|
goto out;
|
|
err = msdos_format_name(new_dentry->d_name.name,
|
|
new_dentry->d_name.len, new_msdos_name,
|
|
&MSDOS_SB(new_dir->i_sb)->options);
|
|
if (err)
|
|
goto out;
|
|
|
|
is_hid =
|
|
(new_dentry->d_name.name[0] == '.') && (new_msdos_name[0] != '.');
|
|
|
|
err = do_msdos_rename(old_dir, old_msdos_name, old_dentry,
|
|
new_dir, new_msdos_name, new_dentry, is_hid);
|
|
out:
|
|
unlock_super(sb);
|
|
if (!err)
|
|
err = fat_flush_inodes(sb, old_dir, new_dir);
|
|
return err;
|
|
}
|
|
|
|
static const struct inode_operations msdos_dir_inode_operations = {
|
|
.create = msdos_create,
|
|
.lookup = msdos_lookup,
|
|
.unlink = msdos_unlink,
|
|
.mkdir = msdos_mkdir,
|
|
.rmdir = msdos_rmdir,
|
|
.rename = msdos_rename,
|
|
.setattr = fat_setattr,
|
|
.getattr = fat_getattr,
|
|
};
|
|
|
|
static void setup(struct super_block *sb)
|
|
{
|
|
MSDOS_SB(sb)->dir_ops = &msdos_dir_inode_operations;
|
|
sb->s_d_op = &msdos_dentry_operations;
|
|
sb->s_flags |= MS_NOATIME;
|
|
}
|
|
|
|
static int msdos_fill_super(struct super_block *sb, void *data, int silent)
|
|
{
|
|
return fat_fill_super(sb, data, silent, 0, setup);
|
|
}
|
|
|
|
static struct dentry *msdos_mount(struct file_system_type *fs_type,
|
|
int flags, const char *dev_name,
|
|
void *data)
|
|
{
|
|
return mount_bdev(fs_type, flags, dev_name, data, msdos_fill_super);
|
|
}
|
|
|
|
static struct file_system_type msdos_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "msdos",
|
|
.mount = msdos_mount,
|
|
.kill_sb = kill_block_super,
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
};
|
|
|
|
static int __init init_msdos_fs(void)
|
|
{
|
|
return register_filesystem(&msdos_fs_type);
|
|
}
|
|
|
|
static void __exit exit_msdos_fs(void)
|
|
{
|
|
unregister_filesystem(&msdos_fs_type);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Werner Almesberger");
|
|
MODULE_DESCRIPTION("MS-DOS filesystem support");
|
|
|
|
module_init(init_msdos_fs)
|
|
module_exit(exit_msdos_fs)
|