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 | { | |
bf29e886 HTL |
19 | char *xattr_name; |
20 | int res; | |
127e5f5a VD |
21 | |
22 | if (!strcmp(name, "")) | |
23 | return -EINVAL; | |
24 | ||
bf29e886 HTL |
25 | xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1, |
26 | GFP_KERNEL); | |
27 | if (!xattr_name) | |
28 | return -ENOMEM; | |
127e5f5a VD |
29 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); |
30 | strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name); | |
31 | ||
bf29e886 HTL |
32 | res = hfsplus_getxattr(dentry, xattr_name, buffer, size); |
33 | kfree(xattr_name); | |
34 | return res; | |
127e5f5a VD |
35 | } |
36 | ||
37 | static int hfsplus_security_setxattr(struct dentry *dentry, const char *name, | |
38 | const void *buffer, size_t size, int flags, int type) | |
39 | { | |
bf29e886 HTL |
40 | char *xattr_name; |
41 | int res; | |
127e5f5a VD |
42 | |
43 | if (!strcmp(name, "")) | |
44 | return -EINVAL; | |
45 | ||
bf29e886 HTL |
46 | xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1, |
47 | GFP_KERNEL); | |
48 | if (!xattr_name) | |
49 | return -ENOMEM; | |
127e5f5a VD |
50 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); |
51 | strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name); | |
52 | ||
bf29e886 HTL |
53 | res = hfsplus_setxattr(dentry, xattr_name, buffer, size, flags); |
54 | kfree(xattr_name); | |
55 | return res; | |
127e5f5a VD |
56 | } |
57 | ||
58 | static size_t hfsplus_security_listxattr(struct dentry *dentry, char *list, | |
59 | size_t list_size, const char *name, size_t name_len, int type) | |
60 | { | |
61 | /* | |
62 | * This method is not used. | |
63 | * It is used hfsplus_listxattr() instead of generic_listxattr(). | |
64 | */ | |
65 | return -EOPNOTSUPP; | |
66 | } | |
67 | ||
68 | static int hfsplus_initxattrs(struct inode *inode, | |
69 | const struct xattr *xattr_array, | |
70 | void *fs_info) | |
71 | { | |
72 | const struct xattr *xattr; | |
bf29e886 | 73 | char *xattr_name; |
127e5f5a VD |
74 | int err = 0; |
75 | ||
bf29e886 HTL |
76 | xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1, |
77 | GFP_KERNEL); | |
78 | if (!xattr_name) | |
79 | return -ENOMEM; | |
127e5f5a | 80 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
127e5f5a | 81 | |
bf29e886 | 82 | if (!strcmp(xattr->name, "")) |
127e5f5a VD |
83 | continue; |
84 | ||
127e5f5a VD |
85 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); |
86 | strcpy(xattr_name + | |
87 | XATTR_SECURITY_PREFIX_LEN, xattr->name); | |
88 | memset(xattr_name + | |
bf29e886 | 89 | XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1); |
127e5f5a VD |
90 | |
91 | err = __hfsplus_setxattr(inode, xattr_name, | |
92 | xattr->value, xattr->value_len, 0); | |
93 | if (err) | |
94 | break; | |
95 | } | |
bf29e886 | 96 | kfree(xattr_name); |
127e5f5a VD |
97 | return err; |
98 | } | |
99 | ||
100 | int hfsplus_init_security(struct inode *inode, struct inode *dir, | |
101 | const struct qstr *qstr) | |
102 | { | |
103 | return security_inode_init_security(inode, dir, qstr, | |
104 | &hfsplus_initxattrs, NULL); | |
105 | } | |
106 | ||
b4c1107c VD |
107 | int hfsplus_init_inode_security(struct inode *inode, |
108 | struct inode *dir, | |
109 | const struct qstr *qstr) | |
110 | { | |
111 | int err; | |
112 | ||
113 | err = hfsplus_init_posix_acl(inode, dir); | |
114 | if (!err) | |
115 | err = hfsplus_init_security(inode, dir, qstr); | |
116 | return err; | |
117 | } | |
118 | ||
127e5f5a VD |
119 | const struct xattr_handler hfsplus_xattr_security_handler = { |
120 | .prefix = XATTR_SECURITY_PREFIX, | |
121 | .list = hfsplus_security_listxattr, | |
122 | .get = hfsplus_security_getxattr, | |
123 | .set = hfsplus_security_setxattr, | |
124 | }; |