2 #include <linux/errno.h>
4 #include <linux/pagemap.h>
5 #include <linux/xattr.h>
6 #include <linux/slab.h>
8 #include <linux/security.h>
9 #include <linux/uaccess.h>
12 security_get(const struct xattr_handler *handler, struct dentry *dentry,
13 const char *name, void *buffer, size_t size)
15 if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
18 if (IS_PRIVATE(d_inode(dentry)))
21 return reiserfs_xattr_get(d_inode(dentry), name, buffer, size);
25 security_set(const struct xattr_handler *handler, struct dentry *dentry,
26 const char *name, const void *buffer, size_t size, int flags)
28 if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
31 if (IS_PRIVATE(d_inode(dentry)))
34 return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
37 static size_t security_list(const struct xattr_handler *handler,
38 struct dentry *dentry, char *list, size_t list_len,
39 const char *name, size_t namelen)
41 const size_t len = namelen + 1;
43 if (IS_PRIVATE(d_inode(dentry)))
46 if (list && len <= list_len) {
47 memcpy(list, name, namelen);
54 /* Initializes the security context for a new inode and returns the number
55 * of blocks needed for the transaction. If successful, reiserfs_security
56 * must be released using reiserfs_security_free when the caller is done. */
57 int reiserfs_security_init(struct inode *dir, struct inode *inode,
58 const struct qstr *qstr,
59 struct reiserfs_security_handle *sec)
66 /* Don't add selinux attributes on xattrs - they'll never get used */
70 error = security_old_inode_init_security(inode, dir, qstr, &sec->name,
71 &sec->value, &sec->length);
73 if (error == -EOPNOTSUPP)
82 if (sec->length && reiserfs_xattrs_initialized(inode->i_sb)) {
83 blocks = reiserfs_xattr_jcreate_nblocks(inode) +
84 reiserfs_xattr_nblocks(inode, sec->length);
85 /* We don't want to count the directories twice if we have
87 REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
92 int reiserfs_security_write(struct reiserfs_transaction_handle *th,
94 struct reiserfs_security_handle *sec)
97 if (strlen(sec->name) < sizeof(XATTR_SECURITY_PREFIX))
100 error = reiserfs_xattr_set_handle(th, inode, sec->name, sec->value,
101 sec->length, XATTR_CREATE);
102 if (error == -ENODATA || error == -EOPNOTSUPP)
108 void reiserfs_security_free(struct reiserfs_security_handle *sec)
116 const struct xattr_handler reiserfs_xattr_security_handler = {
117 .prefix = XATTR_SECURITY_PREFIX,
120 .list = security_list,