[dm-devel] [PATCH 1/3] libmultipath: keep existing dm_info if you fail to get a new one
Benjamin Marzinski
bmarzins at redhat.com
Fri Dec 3 01:34:10 UTC 2021
There are reasons that dm_get_info() can fail other than the multipath
device not existing. If there is an existing dm_info structure and the
call fails, don't free it.
Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>
---
libmultipath/devmapper.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
index c0eb3351..6d24a2be 100644
--- a/libmultipath/devmapper.c
+++ b/libmultipath/devmapper.c
@@ -1590,22 +1590,26 @@ alloc_dminfo (void)
}
int
-dm_get_info (const char * mapname, struct dm_info ** dmi)
+dm_get_info (const char * mapname, struct dm_info ** dmi_p)
{
+ struct dm_info *dmi = NULL;
+
if (!mapname)
return 1;
- if (!*dmi)
- *dmi = alloc_dminfo();
-
- if (!*dmi)
- return 1;
+ if (!*dmi_p) {
+ dmi = alloc_dminfo();
+ if (!dmi)
+ return 1;
+ } else
+ dmi = *dmi_p;
- if (do_get_info(mapname, *dmi) != 0) {
- free(*dmi);
- *dmi = NULL;
+ if (do_get_info(mapname, dmi) != 0) {
+ if (!*dmi_p)
+ free(dmi);
return 1;
- }
+ } else if (!*dmi_p)
+ *dmi_p = dmi;
return 0;
}
--
2.17.2
More information about the dm-devel
mailing list