Commit | Line | Data |
---|---|---|
127e5f5a VD |
1 | /* |
2 | * linux/fs/hfsplus/xattr_trusted.c | |
3 | * | |
4 | * Vyacheslav Dubeyko <slava@dubeyko.com> | |
5 | * | |
6 | * Handler for storing security labels as extended attributes. | |
7 | */ | |
8 | ||
9 | #include <linux/security.h> | |
bf29e886 HTL |
10 | #include <linux/nls.h> |
11 | ||
127e5f5a VD |
12 | #include "hfsplus_fs.h" |
13 | #include "xattr.h" | |
b4c1107c | 14 | #include "acl.h" |
127e5f5a VD |
15 | |
16 | static int hfsplus_security_getxattr(struct dentry *dentry, const char *name, | |
17 | void *buffer, size_t size, int type) | |
18 | { | |
a3cef4cd FF |
19 | return hfsplus_getxattr(dentry, name, buffer, size, |
20 | XATTR_SECURITY_PREFIX, | |
21 | XATTR_SECURITY_PREFIX_LEN); | |
127e5f5a VD |
22 | } |
23 | ||
24 | static int hfsplus_security_setxattr(struct dentry *dentry, const char *name, | |
25 | const void *buffer, size_t size, int flags, int type) | |
26 | { | |
5e61473e FF |
27 | return hfsplus_setxattr(dentry, name, buffer, size, flags, |
28 | XATTR_SECURITY_PREFIX, | |
29 | XATTR_SECURITY_PREFIX_LEN); | |
127e5f5a VD |
30 | } |
31 | ||
32 | static size_t hfsplus_security_listxattr(struct dentry *dentry, char *list, | |
33 | size_t list_size, const char *name, size_t name_len, int type) | |
34 | { | |
35 | /* | |
36 | * This method is not used. | |
37 | * It is used hfsplus_listxattr() instead of generic_listxattr(). | |
38 | */ | |
39 | return -EOPNOTSUPP; | |
40 | } | |
41 | ||
42 | static int hfsplus_initxattrs(struct inode *inode, | |
43 | const struct xattr *xattr_array, | |
44 | void *fs_info) | |
45 | { | |
46 | const struct xattr *xattr; | |
bf29e886 | 47 | char *xattr_name; |
127e5f5a VD |
48 | int err = 0; |
49 | ||
bf29e886 HTL |
50 | xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1, |
51 | GFP_KERNEL); | |
52 | if (!xattr_name) | |
53 | return -ENOMEM; | |
127e5f5a | 54 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
127e5f5a | 55 | |
bf29e886 | 56 | if (!strcmp(xattr->name, "")) |
127e5f5a VD |
57 | continue; |
58 | ||
127e5f5a VD |
59 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); |
60 | strcpy(xattr_name + | |
61 | XATTR_SECURITY_PREFIX_LEN, xattr->name); | |
62 | memset(xattr_name + | |
bf29e886 | 63 | XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1); |
127e5f5a VD |
64 | |
65 | err = __hfsplus_setxattr(inode, xattr_name, | |
66 | xattr->value, xattr->value_len, 0); | |
67 | if (err) | |
68 | break; | |
69 | } | |
bf29e886 | 70 | kfree(xattr_name); |
127e5f5a VD |
71 | return err; |
72 | } | |
73 | ||
74 | int hfsplus_init_security(struct inode *inode, struct inode *dir, | |
75 | const struct qstr *qstr) | |
76 | { | |
77 | return security_inode_init_security(inode, dir, qstr, | |
78 | &hfsplus_initxattrs, NULL); | |
79 | } | |
80 | ||
b4c1107c VD |
81 | int hfsplus_init_inode_security(struct inode *inode, |
82 | struct inode *dir, | |
83 | const struct qstr *qstr) | |
84 | { | |
85 | int err; | |
86 | ||
87 | err = hfsplus_init_posix_acl(inode, dir); | |
88 | if (!err) | |
89 | err = hfsplus_init_security(inode, dir, qstr); | |
90 | return err; | |
91 | } | |
92 | ||
127e5f5a VD |
93 | const struct xattr_handler hfsplus_xattr_security_handler = { |
94 | .prefix = XATTR_SECURITY_PREFIX, | |
95 | .list = hfsplus_security_listxattr, | |
96 | .get = hfsplus_security_getxattr, | |
97 | .set = hfsplus_security_setxattr, | |
98 | }; |