1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/ext2/xattr_security.c
4 * Handler for storing security labels as extended attributes.
5 */
6
7 #include "ext2.h"
8 #include <linux/security.h>
9 #include "xattr.h"
10
11 static int
ext2_xattr_security_get(const struct xattr_handler * handler,struct dentry * unused,struct inode * inode,const char * name,void * buffer,size_t size,int flags)12 ext2_xattr_security_get(const struct xattr_handler *handler,
13 struct dentry *unused, struct inode *inode,
14 const char *name, void *buffer, size_t size, int flags)
15 {
16 return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name,
17 buffer, size);
18 }
19
20 static int
ext2_xattr_security_set(const struct xattr_handler * handler,struct dentry * unused,struct inode * inode,const char * name,const void * value,size_t size,int flags)21 ext2_xattr_security_set(const struct xattr_handler *handler,
22 struct dentry *unused, struct inode *inode,
23 const char *name, const void *value,
24 size_t size, int flags)
25 {
26 return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name,
27 value, size, flags);
28 }
29
ext2_initxattrs(struct inode * inode,const struct xattr * xattr_array,void * fs_info)30 static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
31 void *fs_info)
32 {
33 const struct xattr *xattr;
34 int err = 0;
35
36 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
37 err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
38 xattr->name, xattr->value,
39 xattr->value_len, 0);
40 if (err < 0)
41 break;
42 }
43 return err;
44 }
45
46 int
ext2_init_security(struct inode * inode,struct inode * dir,const struct qstr * qstr)47 ext2_init_security(struct inode *inode, struct inode *dir,
48 const struct qstr *qstr)
49 {
50 return security_inode_init_security(inode, dir, qstr,
51 &ext2_initxattrs, NULL);
52 }
53
54 const struct xattr_handler ext2_xattr_security_handler = {
55 .prefix = XATTR_SECURITY_PREFIX,
56 .get = ext2_xattr_security_get,
57 .set = ext2_xattr_security_set,
58 };
59