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-rw-r--r--fs/reiserfs/xattr_security.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 2aacf1fe69f..4d3c20e787c 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -4,6 +4,7 @@
#include <linux/pagemap.h>
#include <linux/xattr.h>
#include <linux/reiserfs_xattr.h>
+#include <linux/security.h>
#include <asm/uaccess.h>
static int
@@ -47,6 +48,59 @@ static size_t security_list(struct inode *inode, char *list, size_t list_len,
return len;
}
+/* Initializes the security context for a new inode and returns the number
+ * of blocks needed for the transaction. If successful, reiserfs_security
+ * must be released using reiserfs_security_free when the caller is done. */
+int reiserfs_security_init(struct inode *dir, struct inode *inode,
+ struct reiserfs_security_handle *sec)
+{
+ int blocks = 0;
+ int error = security_inode_init_security(inode, dir, &sec->name,
+ &sec->value, &sec->length);
+ if (error) {
+ if (error == -EOPNOTSUPP)
+ error = 0;
+
+ sec->name = NULL;
+ sec->value = NULL;
+ sec->length = 0;
+ return error;
+ }
+
+ if (sec->length) {
+ blocks = reiserfs_xattr_jcreate_nblocks(inode) +
+ reiserfs_xattr_nblocks(inode, sec->length);
+ /* We don't want to count the directories twice if we have
+ * a default ACL. */
+ REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+ }
+ return blocks;
+}
+
+int reiserfs_security_write(struct reiserfs_transaction_handle *th,
+ struct inode *inode,
+ struct reiserfs_security_handle *sec)
+{
+ int error;
+ if (strlen(sec->name) < sizeof(XATTR_SECURITY_PREFIX))
+ return -EINVAL;
+
+ error = reiserfs_xattr_set_handle(th, inode, sec->name, sec->value,
+ sec->length, XATTR_CREATE);
+ if (error == -ENODATA || error == -EOPNOTSUPP)
+ error = 0;
+
+ return error;
+}
+
+void reiserfs_security_free(struct reiserfs_security_handle *sec)
+{
+ kfree(sec->name);
+ kfree(sec->value);
+ sec->name = NULL;
+ sec->value = NULL;
+}
+
struct xattr_handler reiserfs_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.get = security_get,