[PATCH 1/3] Add UUID setter method to dm.map.

[David Lehman <dlehman@xxxxxxxxxx>]

This relies on a proposed patch to add dm_task_set_newuuid to libdevmapper
and accompanying support in the kernel device-mapper layer.

Related: rhbz#584328
---
 dm.c |   55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 54 insertions(+), 1 deletions(-)

diff --git a/dm.c b/dm.c
index 8747cde..5daa0e5 100644
--- a/dm.c
+++ b/dm.c
@@ -1076,6 +1076,52 @@ pydm_map_set_name(PydmMapObject *map, const char *name)
 }
 
 static int
+pydm_map_set_uuid(PydmMapObject *map, const char *uuid)
+{
+	struct dm_task *task;
+	int rc;
+	char *newuuid;
+
+	rc = pydm_map_refresh(map);
+	if (rc < 0)
+		return rc;
+
+	dm_log_init(pydm_log_fn);
+	task = dm_task_create(DM_DEVICE_RENAME);
+	if (!task) {
+		if (!PyErr_Occurred()) {
+			printf("%s: %d\n", __FILE__, __LINE__);
+			PyErr_NoMemory();
+		}
+		dm_log_init(NULL);
+		return -1;
+	}
+
+	newuuid = strdup(uuid);
+	if (!newuuid) {
+		dm_task_destroy(task);
+		dm_log_init(NULL);
+		printf("%s: %d\n", __FILE__, __LINE__);
+		PyErr_NoMemory();
+		return -1;
+	}
+
+	dm_task_set_name(task, map->name);
+	dm_task_set_newuuid(task, newuuid);
+	dm_task_run(task);
+	python_error_destroy_task(task, -1);
+
+	dm_task_update_nodes();
+	dm_task_destroy(task);
+	dm_log_init(NULL);
+
+	free(map->uuid);
+	map->uuid = newuuid;
+
+	return pydm_map_refresh(map);
+}
+
+static int
 pydm_map_set_suspend(PydmMapObject *map, int suspend)
 {
 	struct dm_task *task;
@@ -1363,6 +1409,13 @@ pydm_map_set(PyObject *self, PyObject *value, void *data)
 			return -1;
 
 		return pydm_map_set_name(map, newname);
+	} else if (!strcmp(attr, "uuid")) {
+		char *newuuid = PyString_AsString(value);
+
+		if (!newuuid || PyErr_Occurred())
+			return -1;
+
+		return pydm_map_set_uuid(map, newuuid);
 	} else if (!strcmp(attr, "suspended")) {
 		long suspended = value == Py_True ? 1 : 0;
 
@@ -1389,7 +1442,7 @@ static struct PyGetSetDef pydm_map_getseters[] = {
 	{"open_count", (getter)pydm_map_get, NULL, "open_count", "open_count"},
 	{"name", (getter)pydm_map_get, (setter)pydm_map_set,
 		"name", "name"},
-	{"uuid", (getter)pydm_map_get, NULL, "uuid", "uuid"},
+	{"uuid", (getter)pydm_map_get, (setter)pydm_map_set, "uuid", "uuid"},
 	{"dev", (getter)pydm_map_get, pydm_map_set, "dev", "dev"},
 	{NULL},
 };
-- 
1.7.2.3

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