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> | |
10 | #include "hfsplus_fs.h" | |
11 | #include "xattr.h" | |
b4c1107c | 12 | #include "acl.h" |
127e5f5a VD |
13 | |
14 | static int hfsplus_security_getxattr(struct dentry *dentry, const char *name, | |
15 | void *buffer, size_t size, int type) | |
16 | { | |
17 | char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0}; | |
18 | size_t len = strlen(name); | |
19 | ||
20 | if (!strcmp(name, "")) | |
21 | return -EINVAL; | |
22 | ||
23 | if (len + XATTR_SECURITY_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN) | |
24 | return -EOPNOTSUPP; | |
25 | ||
26 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); | |
27 | strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name); | |
28 | ||
29 | return hfsplus_getxattr(dentry, xattr_name, buffer, size); | |
30 | } | |
31 | ||
32 | static int hfsplus_security_setxattr(struct dentry *dentry, const char *name, | |
33 | const void *buffer, size_t size, int flags, int type) | |
34 | { | |
35 | char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0}; | |
36 | size_t len = strlen(name); | |
37 | ||
38 | if (!strcmp(name, "")) | |
39 | return -EINVAL; | |
40 | ||
41 | if (len + XATTR_SECURITY_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN) | |
42 | return -EOPNOTSUPP; | |
43 | ||
44 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); | |
45 | strcpy(xattr_name + XATTR_SECURITY_PREFIX_LEN, name); | |
46 | ||
47 | return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags); | |
48 | } | |
49 | ||
50 | static size_t hfsplus_security_listxattr(struct dentry *dentry, char *list, | |
51 | size_t list_size, const char *name, size_t name_len, int type) | |
52 | { | |
53 | /* | |
54 | * This method is not used. | |
55 | * It is used hfsplus_listxattr() instead of generic_listxattr(). | |
56 | */ | |
57 | return -EOPNOTSUPP; | |
58 | } | |
59 | ||
60 | static int hfsplus_initxattrs(struct inode *inode, | |
61 | const struct xattr *xattr_array, | |
62 | void *fs_info) | |
63 | { | |
64 | const struct xattr *xattr; | |
65 | char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0}; | |
66 | size_t xattr_name_len; | |
67 | int err = 0; | |
68 | ||
69 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
70 | xattr_name_len = strlen(xattr->name); | |
71 | ||
72 | if (xattr_name_len == 0) | |
73 | continue; | |
74 | ||
75 | if (xattr_name_len + XATTR_SECURITY_PREFIX_LEN > | |
76 | HFSPLUS_ATTR_MAX_STRLEN) | |
77 | return -EOPNOTSUPP; | |
78 | ||
79 | strcpy(xattr_name, XATTR_SECURITY_PREFIX); | |
80 | strcpy(xattr_name + | |
81 | XATTR_SECURITY_PREFIX_LEN, xattr->name); | |
82 | memset(xattr_name + | |
83 | XATTR_SECURITY_PREFIX_LEN + xattr_name_len, 0, 1); | |
84 | ||
85 | err = __hfsplus_setxattr(inode, xattr_name, | |
86 | xattr->value, xattr->value_len, 0); | |
87 | if (err) | |
88 | break; | |
89 | } | |
90 | return err; | |
91 | } | |
92 | ||
93 | int hfsplus_init_security(struct inode *inode, struct inode *dir, | |
94 | const struct qstr *qstr) | |
95 | { | |
96 | return security_inode_init_security(inode, dir, qstr, | |
97 | &hfsplus_initxattrs, NULL); | |
98 | } | |
99 | ||
b4c1107c VD |
100 | int hfsplus_init_inode_security(struct inode *inode, |
101 | struct inode *dir, | |
102 | const struct qstr *qstr) | |
103 | { | |
104 | int err; | |
105 | ||
106 | err = hfsplus_init_posix_acl(inode, dir); | |
107 | if (!err) | |
108 | err = hfsplus_init_security(inode, dir, qstr); | |
109 | return err; | |
110 | } | |
111 | ||
127e5f5a VD |
112 | const struct xattr_handler hfsplus_xattr_security_handler = { |
113 | .prefix = XATTR_SECURITY_PREFIX, | |
114 | .list = hfsplus_security_listxattr, | |
115 | .get = hfsplus_security_getxattr, | |
116 | .set = hfsplus_security_setxattr, | |
117 | }; |