Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
127e5f5a VD |
2 | /* |
3 | * linux/fs/hfsplus/xattr_trusted.c | |
4 | * | |
5 | * Vyacheslav Dubeyko <slava@dubeyko.com> | |
6 | * | |
7 | * Handler for storing security labels as extended attributes. | |
8 | */ | |
9 | ||
10 | #include <linux/security.h> | |
bf29e886 HTL |
11 | #include <linux/nls.h> |
12 | ||
127e5f5a VD |
13 | #include "hfsplus_fs.h" |
14 | #include "xattr.h" | |
b4c1107c | 15 | #include "acl.h" |
127e5f5a | 16 | |
d9a82a04 | 17 | static int hfsplus_security_getxattr(const struct xattr_handler *handler, |
b296821a AV |
18 | struct dentry *unused, struct inode *inode, |
19 | const char *name, void *buffer, size_t size) | |
127e5f5a | 20 | { |
b296821a | 21 | return hfsplus_getxattr(inode, name, buffer, size, |
a3cef4cd FF |
22 | XATTR_SECURITY_PREFIX, |
23 | XATTR_SECURITY_PREFIX_LEN); | |
127e5f5a VD |
24 | } |
25 | ||
d9a82a04 | 26 | static int hfsplus_security_setxattr(const struct xattr_handler *handler, |
59301226 AV |
27 | struct dentry *unused, struct inode *inode, |
28 | const char *name, const void *buffer, | |
29 | size_t size, int flags) | |
127e5f5a | 30 | { |
59301226 | 31 | return hfsplus_setxattr(inode, name, buffer, size, flags, |
5e61473e FF |
32 | XATTR_SECURITY_PREFIX, |
33 | XATTR_SECURITY_PREFIX_LEN); | |
127e5f5a VD |
34 | } |
35 | ||
127e5f5a VD |
36 | static int hfsplus_initxattrs(struct inode *inode, |
37 | const struct xattr *xattr_array, | |
38 | void *fs_info) | |
39 | { | |
40 | const struct xattr *xattr; | |
bf29e886 | 41 | char *xattr_name; |
127e5f5a VD |
42 | int err = 0; |
43 | ||
bf29e886 HTL |
44 | xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1, |
45 | GFP_KERNEL); | |
46 | if (!xattr_name) | |
47 | return -ENOMEM; | |
127e5f5a | 48 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
127e5f5a | 49 | |
bf29e886 | 50 | if (!strcmp(xattr->name, "")) |
127e5f5a VD |
51 | continue; |
52 | ||
127e5f5a VD |
53 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); |
54 | strcpy(xattr_name + | |
55 | XATTR_SECURITY_PREFIX_LEN, xattr->name); | |
56 | memset(xattr_name + | |
bf29e886 | 57 | XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1); |
127e5f5a VD |
58 | |
59 | err = __hfsplus_setxattr(inode, xattr_name, | |
60 | xattr->value, xattr->value_len, 0); | |
61 | if (err) | |
62 | break; | |
63 | } | |
bf29e886 | 64 | kfree(xattr_name); |
127e5f5a VD |
65 | return err; |
66 | } | |
67 | ||
68 | int hfsplus_init_security(struct inode *inode, struct inode *dir, | |
69 | const struct qstr *qstr) | |
70 | { | |
71 | return security_inode_init_security(inode, dir, qstr, | |
72 | &hfsplus_initxattrs, NULL); | |
73 | } | |
74 | ||
b4c1107c VD |
75 | int hfsplus_init_inode_security(struct inode *inode, |
76 | struct inode *dir, | |
77 | const struct qstr *qstr) | |
78 | { | |
79 | int err; | |
80 | ||
81 | err = hfsplus_init_posix_acl(inode, dir); | |
82 | if (!err) | |
83 | err = hfsplus_init_security(inode, dir, qstr); | |
84 | return err; | |
85 | } | |
86 | ||
127e5f5a VD |
87 | const struct xattr_handler hfsplus_xattr_security_handler = { |
88 | .prefix = XATTR_SECURITY_PREFIX, | |
127e5f5a VD |
89 | .get = hfsplus_security_getxattr, |
90 | .set = hfsplus_security_setxattr, | |
91 | }; |