[libvirt] [PATCH v2] Don't overwrite errors in qemuTranslateDiskSourcePool
Both virStoragePoolFree and virStorageVolFree reset the last error,
which might lead to the cryptic message:
An error occurred, but the cause is unknown
When the volume wasn't found, virStorageVolFree was called with NULL,
leading to an error:
invalid storage volume pointer in virStorageVolFree
This patch changes it to:
Storage volume not found: no storage vol with matching name 'tomato'
---
v1: https://www.redhat.com/archives/libvir-list/2013-July/msg01522.html
v2: only save/restore the error when ret < 0
src/qemu/qemu_conf.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 3e7b78a..18e926c 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -1248,6 +1248,7 @@ qemuTranslateDiskSourcePool(virConnectPtr conn,
char *poolxml = NULL;
virStorageVolInfo info;
int ret = -1;
+ virErrorPtr savedError = NULL;
if (def->type != VIR_DOMAIN_DISK_TYPE_VOLUME)
return 0;
@@ -1324,8 +1325,17 @@ qemuTranslateDiskSourcePool(virConnectPtr conn,
def->srcpool->voltype = info.type;
ret = 0;
cleanup:
- virStoragePoolFree(pool);
- virStorageVolFree(vol);
+ if (ret < 0)
+ savedError = virSaveLastError();
+ if (pool)
+ virStoragePoolFree(pool);
+ if (vol)
+ virStorageVolFree(vol);
+ if (savedError) {
+ virSetError(savedError);
+ virFreeError(savedError);
+ }
+
VIR_FREE(poolxml);
virStoragePoolDefFree(pooldef);
return ret;
--
1.8.1.5