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[05/10] kpartx: dm_devn: return error for non-existent device

Message ID 20170505220559.7248-6-mwilck@suse.com (mailing list archive)
State Not Applicable, archived
Delegated to: christophe varoqui
Headers show

Commit Message

Martin Wilck May 5, 2017, 10:05 p.m. UTC 
For non-existent maps (ENXIO from ioctl()), dm_task_run and
dm_task_get_info return success. We need to check info.exists.

Signed-off-by: Martin Wilck <mwilck@suse.com>
---
 kpartx/devmapper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/kpartx/devmapper.c b/kpartx/devmapper.c
index 8f48a705..d6ccd000 100644
--- a/kpartx/devmapper.c
+++ b/kpartx/devmapper.c
@@ -293,7 +293,7 @@  dm_devn (const char * mapname, int *major, int *minor)
 	if (!dm_task_run(dmt))
 		goto out;
 
-	if (!dm_task_get_info(dmt, &info))
+	if (!dm_task_get_info(dmt, &info) || info.exists == 0)
 		goto out;
 
 	*major = info.major;