mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![David Howells](/assets/img/avatar_default.png)
that's the bulk of filesystem drivers dealing with inodes of their own Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/*
|
|
* linux/fs/ext4/xattr_user.c
|
|
* Handler for extended user attributes.
|
|
*
|
|
* Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
|
*/
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/fs.h>
|
|
#include "ext4_jbd2.h"
|
|
#include "ext4.h"
|
|
#include "xattr.h"
|
|
|
|
static size_t
|
|
ext4_xattr_user_list(struct dentry *dentry, char *list, size_t list_size,
|
|
const char *name, size_t name_len, int type)
|
|
{
|
|
const size_t prefix_len = XATTR_USER_PREFIX_LEN;
|
|
const size_t total_len = prefix_len + name_len + 1;
|
|
|
|
if (!test_opt(dentry->d_sb, XATTR_USER))
|
|
return 0;
|
|
|
|
if (list && total_len <= list_size) {
|
|
memcpy(list, XATTR_USER_PREFIX, prefix_len);
|
|
memcpy(list+prefix_len, name, name_len);
|
|
list[prefix_len + name_len] = '\0';
|
|
}
|
|
return total_len;
|
|
}
|
|
|
|
static int
|
|
ext4_xattr_user_get(struct dentry *dentry, const char *name,
|
|
void *buffer, size_t size, int type)
|
|
{
|
|
if (strcmp(name, "") == 0)
|
|
return -EINVAL;
|
|
if (!test_opt(dentry->d_sb, XATTR_USER))
|
|
return -EOPNOTSUPP;
|
|
return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_USER,
|
|
name, buffer, size);
|
|
}
|
|
|
|
static int
|
|
ext4_xattr_user_set(struct dentry *dentry, const char *name,
|
|
const void *value, size_t size, int flags, int type)
|
|
{
|
|
if (strcmp(name, "") == 0)
|
|
return -EINVAL;
|
|
if (!test_opt(dentry->d_sb, XATTR_USER))
|
|
return -EOPNOTSUPP;
|
|
return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_USER,
|
|
name, value, size, flags);
|
|
}
|
|
|
|
const struct xattr_handler ext4_xattr_user_handler = {
|
|
.prefix = XATTR_USER_PREFIX,
|
|
.list = ext4_xattr_user_list,
|
|
.get = ext4_xattr_user_get,
|
|
.set = ext4_xattr_user_set,
|
|
};
|