[PATCH 28/44] libmultipath: implement dm_is_mpath() with new API

[Martin Wilck <martin.wilck@xxxxxxxx>]

Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
---
 libmultipath/devmapper.c | 53 ++++++----------------------------------
 1 file changed, 8 insertions(+), 45 deletions(-)

diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
index 859a861..6276041 100644
--- a/libmultipath/devmapper.c
+++ b/libmultipath/devmapper.c
@@ -965,52 +965,15 @@ static int dm_type_match(const char *name, char *type)
 
 int dm_is_mpath(const char *name)
 {
-	int r = DM_IS_MPATH_ERR;
-	struct dm_task __attribute__((cleanup(cleanup_dm_task))) *dmt = NULL;
-	struct dm_info info;
-	uint64_t start, length;
-	char *target_type = NULL;
-	char *params;
-	const char *uuid;
+	char uuid[DM_UUID_LEN];
+	int rc = libmp_mapinfo(DM_MAP_BY_NAME,
+			       (mapid_t) { .str = name },
+			       (mapinfo_t) { .uuid = uuid, .tgt_type = TGT_MPATH });
 
-	if (!(dmt = libmp_dm_task_create(DM_DEVICE_TABLE)))
-		goto out;
-
-	if (!dm_task_set_name(dmt, name))
-		goto out;
-
-	if (!libmp_dm_task_run(dmt)) {
-		dm_log_error(3, DM_DEVICE_TABLE, dmt);
-		goto out;
-	}
-
-	if (!dm_task_get_info(dmt, &info))
-		goto out;
-
-	r = DM_IS_MPATH_NO;
-
-	if (!info.exists)
-		goto out;
-
-	uuid = dm_task_get_uuid(dmt);
-
-	if (!uuid || strncmp(uuid, UUID_PREFIX, UUID_PREFIX_LEN) != 0)
-		goto out;
-
-	/* Fetch 1st target */
-	if (dm_get_next_target(dmt, NULL, &start, &length, &target_type,
-			       &params) != NULL)
-		/* multiple targets */
-		goto out;
-
-	if (!target_type || strcmp(target_type, TGT_MPATH) != 0)
-		goto out;
-
-	r = DM_IS_MPATH_YES;
-out:
-	if (r < 0)
-		condlog(3, "%s: dm command failed in %s: %s", name, __func__, strerror(errno));
-	return r;
+	if (rc != DMP_OK || strncmp(uuid, UUID_PREFIX, UUID_PREFIX_LEN))
+		return DM_IS_MPATH_NO;
+	else
+		return DM_IS_MPATH_YES;
 }
 
 int dm_map_present_by_wwid(const char *wwid)
-- 
2.45.2