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 | 15 | |
d9a82a04 AG |
16 | static int hfsplus_security_getxattr(const struct xattr_handler *handler, |
17 | struct dentry *dentry, const char *name, | |
18 | void *buffer, size_t size) | |
127e5f5a | 19 | { |
a3cef4cd FF |
20 | return hfsplus_getxattr(dentry, name, buffer, size, |
21 | XATTR_SECURITY_PREFIX, | |
22 | XATTR_SECURITY_PREFIX_LEN); | |
127e5f5a VD |
23 | } |
24 | ||
d9a82a04 AG |
25 | static int hfsplus_security_setxattr(const struct xattr_handler *handler, |
26 | struct dentry *dentry, const char *name, | |
27 | const void *buffer, size_t size, int flags) | |
127e5f5a | 28 | { |
5e61473e FF |
29 | return hfsplus_setxattr(dentry, name, buffer, size, flags, |
30 | XATTR_SECURITY_PREFIX, | |
31 | XATTR_SECURITY_PREFIX_LEN); | |
127e5f5a VD |
32 | } |
33 | ||
127e5f5a VD |
34 | static int hfsplus_initxattrs(struct inode *inode, |
35 | const struct xattr *xattr_array, | |
36 | void *fs_info) | |
37 | { | |
38 | const struct xattr *xattr; | |
bf29e886 | 39 | char *xattr_name; |
127e5f5a VD |
40 | int err = 0; |
41 | ||
bf29e886 HTL |
42 | xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1, |
43 | GFP_KERNEL); | |
44 | if (!xattr_name) | |
45 | return -ENOMEM; | |
127e5f5a | 46 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
127e5f5a | 47 | |
bf29e886 | 48 | if (!strcmp(xattr->name, "")) |
127e5f5a VD |
49 | continue; |
50 | ||
127e5f5a VD |
51 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); |
52 | strcpy(xattr_name + | |
53 | XATTR_SECURITY_PREFIX_LEN, xattr->name); | |
54 | memset(xattr_name + | |
bf29e886 | 55 | XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1); |
127e5f5a VD |
56 | |
57 | err = __hfsplus_setxattr(inode, xattr_name, | |
58 | xattr->value, xattr->value_len, 0); | |
59 | if (err) | |
60 | break; | |
61 | } | |
bf29e886 | 62 | kfree(xattr_name); |
127e5f5a VD |
63 | return err; |
64 | } | |
65 | ||
66 | int hfsplus_init_security(struct inode *inode, struct inode *dir, | |
67 | const struct qstr *qstr) | |
68 | { | |
69 | return security_inode_init_security(inode, dir, qstr, | |
70 | &hfsplus_initxattrs, NULL); | |
71 | } | |
72 | ||
b4c1107c VD |
73 | int hfsplus_init_inode_security(struct inode *inode, |
74 | struct inode *dir, | |
75 | const struct qstr *qstr) | |
76 | { | |
77 | int err; | |
78 | ||
79 | err = hfsplus_init_posix_acl(inode, dir); | |
80 | if (!err) | |
81 | err = hfsplus_init_security(inode, dir, qstr); | |
82 | return err; | |
83 | } | |
84 | ||
127e5f5a VD |
85 | const struct xattr_handler hfsplus_xattr_security_handler = { |
86 | .prefix = XATTR_SECURITY_PREFIX, | |
127e5f5a VD |
87 | .get = hfsplus_security_getxattr, |
88 | .set = hfsplus_security_setxattr, | |
89 | }; |