2 * linux/fs/ext3/xattr_security.c
3 * Handler for storing security labels as extended attributes.
6 #include <linux/module.h>
7 #include <linux/slab.h>
8 #include <linux/string.h>
10 #include <linux/ext3_jbd.h>
11 #include <linux/ext3_fs.h>
12 #include <linux/security.h>
16 ext3_xattr_security_list(struct dentry *dentry, char *list, size_t list_size,
17 const char *name, size_t name_len, int type)
19 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
20 const size_t total_len = prefix_len + name_len + 1;
23 if (list && total_len <= list_size) {
24 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
25 memcpy(list+prefix_len, name, name_len);
26 list[prefix_len + name_len] = '\0';
32 ext3_xattr_security_get(struct dentry *dentry, const char *name,
33 void *buffer, size_t size, int type)
35 if (strcmp(name, "") == 0)
37 return ext3_xattr_get(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
42 ext3_xattr_security_set(struct dentry *dentry, const char *name,
43 const void *value, size_t size, int flags, int type)
45 if (strcmp(name, "") == 0)
47 return ext3_xattr_set(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
48 name, value, size, flags);
51 int ext3_initxattrs(struct inode *inode, const struct xattr *xattr_array,
54 const struct xattr *xattr;
55 handle_t *handle = fs_info;
58 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
59 err = ext3_xattr_set_handle(handle, inode,
60 EXT3_XATTR_INDEX_SECURITY,
61 xattr->name, xattr->value,
70 ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
71 const struct qstr *qstr)
73 return security_inode_init_security(inode, dir, qstr,
74 &ext3_initxattrs, handle);
77 const struct xattr_handler ext3_xattr_security_handler = {
78 .prefix = XATTR_SECURITY_PREFIX,
79 .list = ext3_xattr_security_list,
80 .get = ext3_xattr_security_get,
81 .set = ext3_xattr_security_set,