92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* linux/fs/hfsplus/xattr_trusted.c
|
|
*
|
|
* Vyacheslav Dubeyko <slava@dubeyko.com>
|
|
*
|
|
* Handler for storing security labels as extended attributes.
|
|
*/
|
|
|
|
#include <linux/security.h>
|
|
#include <linux/nls.h>
|
|
|
|
#include "hfsplus_fs.h"
|
|
#include "xattr.h"
|
|
#include "acl.h"
|
|
|
|
static int hfsplus_security_getxattr(const struct xattr_handler *handler,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, void *buffer, size_t size)
|
|
{
|
|
return hfsplus_getxattr(inode, name, buffer, size,
|
|
XATTR_SECURITY_PREFIX,
|
|
XATTR_SECURITY_PREFIX_LEN);
|
|
}
|
|
|
|
static int hfsplus_security_setxattr(const struct xattr_handler *handler,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, const void *buffer,
|
|
size_t size, int flags)
|
|
{
|
|
return hfsplus_setxattr(inode, name, buffer, size, flags,
|
|
XATTR_SECURITY_PREFIX,
|
|
XATTR_SECURITY_PREFIX_LEN);
|
|
}
|
|
|
|
static int hfsplus_initxattrs(struct inode *inode,
|
|
const struct xattr *xattr_array,
|
|
void *fs_info)
|
|
{
|
|
const struct xattr *xattr;
|
|
char *xattr_name;
|
|
int err = 0;
|
|
|
|
xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
|
|
GFP_KERNEL);
|
|
if (!xattr_name)
|
|
return -ENOMEM;
|
|
for (xattr = xattr_array; xattr->name != NULL; xattr++) {
|
|
|
|
if (!strcmp(xattr->name, ""))
|
|
continue;
|
|
|
|
strcpy(xattr_name, XATTR_SECURITY_PREFIX);
|
|
strcpy(xattr_name +
|
|
XATTR_SECURITY_PREFIX_LEN, xattr->name);
|
|
memset(xattr_name +
|
|
XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
|
|
|
|
err = __hfsplus_setxattr(inode, xattr_name,
|
|
xattr->value, xattr->value_len, 0);
|
|
if (err)
|
|
break;
|
|
}
|
|
kfree(xattr_name);
|
|
return err;
|
|
}
|
|
|
|
int hfsplus_init_security(struct inode *inode, struct inode *dir,
|
|
const struct qstr *qstr)
|
|
{
|
|
return security_inode_init_security(inode, dir, qstr,
|
|
&hfsplus_initxattrs, NULL);
|
|
}
|
|
|
|
int hfsplus_init_inode_security(struct inode *inode,
|
|
struct inode *dir,
|
|
const struct qstr *qstr)
|
|
{
|
|
int err;
|
|
|
|
err = hfsplus_init_posix_acl(inode, dir);
|
|
if (!err)
|
|
err = hfsplus_init_security(inode, dir, qstr);
|
|
return err;
|
|
}
|
|
|
|
const struct xattr_handler hfsplus_xattr_security_handler = {
|
|
.prefix = XATTR_SECURITY_PREFIX,
|
|
.get = hfsplus_security_getxattr,
|
|
.set = hfsplus_security_setxattr,
|
|
};
|