[libvirt] [PATCH v3 2/6] storage: Cleanup failures virStorageBackendCreateExecCommand

[John Ferlan]

After a successful qemu-img/qcow-create of the backing file, if we
fail to stat the file, change it owner/group, or mode, then the
cleanup path should remove the file.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---

 Changes over v2:
  - The 'filecreated' was kept from the previous patch, but we still need
    to set it once virCommandRun and stat() agree the file was created.

  - Use virFileRemove and not just unlink in order to delete the file. If
    this was a root squash created file, then the only way to remove it
    properly is via virFileRemove

 src/storage/storage_backend.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index 2ba6e27..15470e8 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -714,6 +714,7 @@ virStorageBackendCreateExecCommand(virStoragePoolObjPtr pool,
                                  _("failed to create %s"), vol->target.path);
             goto cleanup;
         }
+        filecreated = true;
     }
 
     uid = (vol->target.perms->uid != st.st_uid) ? vol->target.perms->uid
@@ -740,6 +741,9 @@ virStorageBackendCreateExecCommand(virStoragePoolObjPtr pool,
     ret = 0;
 
  cleanup:
+    if (ret < 0 && filecreated)
+        virFileRemove(vol->target.path, vol->target.perms->uid,
+                      vol->target.perms->gid);
     return ret;
 }
 
-- 
2.1.0