749c72efa4
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
|
|
* linux/fs/ext2/xattr_trusted.c
|
|
* Handler for trusted extended attributes.
|
|
*
|
|
* Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/capability.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/ext2_fs.h>
|
|
#include "xattr.h"
|
|
|
|
static size_t
|
|
ext2_xattr_trusted_list(struct dentry *dentry, char *list, size_t list_size,
|
|
const char *name, size_t name_len, int type)
|
|
{
|
|
const int prefix_len = XATTR_TRUSTED_PREFIX_LEN;
|
|
const size_t total_len = prefix_len + name_len + 1;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return 0;
|
|
|
|
if (list && total_len <= list_size) {
|
|
memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
|
|
memcpy(list+prefix_len, name, name_len);
|
|
list[prefix_len + name_len] = '\0';
|
|
}
|
|
return total_len;
|
|
}
|
|
|
|
static int
|
|
ext2_xattr_trusted_get(struct dentry *dentry, const char *name,
|
|
void *buffer, size_t size, int type)
|
|
{
|
|
if (strcmp(name, "") == 0)
|
|
return -EINVAL;
|
|
return ext2_xattr_get(dentry->d_inode, EXT2_XATTR_INDEX_TRUSTED, name,
|
|
buffer, size);
|
|
}
|
|
|
|
static int
|
|
ext2_xattr_trusted_set(struct dentry *dentry, const char *name,
|
|
const void *value, size_t size, int flags, int type)
|
|
{
|
|
if (strcmp(name, "") == 0)
|
|
return -EINVAL;
|
|
return ext2_xattr_set(dentry->d_inode, EXT2_XATTR_INDEX_TRUSTED, name,
|
|
value, size, flags);
|
|
}
|
|
|
|
const struct xattr_handler ext2_xattr_trusted_handler = {
|
|
.prefix = XATTR_TRUSTED_PREFIX,
|
|
.list = ext2_xattr_trusted_list,
|
|
.get = ext2_xattr_trusted_get,
|
|
.set = ext2_xattr_trusted_set,
|
|
};
|