1 files changed, 49 insertions, 0 deletions
diff --git a/lib/utils_device_locking.h b/lib/utils_device_locking.h
new file mode 100644
index 0000000..d3b55a0
--- /dev/null
+++ b/lib/utils_device_locking.h
@@ -0,0 +1,49 @@
+/*
+ * Metadata on-disk locking for processes serialization
+ *
+ * Copyright (C) 2016-2021 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2016-2021 Ondrej Kozina
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _CRYPTSETUP_UTILS_LOCKING_H
+#define _CRYPTSETUP_UTILS_LOCKING_H
+
+#include <stdbool.h>
+
+struct crypt_device;
+struct crypt_lock_handle;
+struct device;
+
+int device_locked_readonly(struct crypt_lock_handle *h);
+int device_locked(struct crypt_lock_handle *h);
+
+int device_read_lock_internal(struct crypt_device *cd, struct device *device);
+int device_write_lock_internal(struct crypt_device *cd, struct device *device);
+void device_unlock_internal(struct crypt_device *cd, struct device *device);
+
+int device_locked_verify(struct crypt_device *cd, int fd, struct crypt_lock_handle *h);
+
+int crypt_read_lock(struct crypt_device *cd, const char *name, bool blocking, struct crypt_lock_handle **lock);
+int crypt_write_lock(struct crypt_device *cd, const char *name, bool blocking, struct crypt_lock_handle **lock);
+void crypt_unlock_internal(struct crypt_device *cd, struct crypt_lock_handle *h);
+
+
+/* Used only in device internal allocation */
+void device_set_lock_handle(struct device *device, struct crypt_lock_handle *h);
+struct crypt_lock_handle *device_get_lock_handle(struct device *device);
+
+#endif