Re: [libvirt] [PATCH libvirt v2 1/9] virConnectRegisterCloseCallback: Cleanup 'opaque' if there is no connectRegisterCloseCallback

The commit 'close callback: move it to driver' (88f09b75eb99) moved the responsibility for the close callback to the driver. But if the driver doesn't support the connectRegisterCloseCallback API this function does nothing, even no unsupported error report. This behavior may lead to problems, for example memory leaks, as the caller cannot differentiate whether the close callback was 'really' registered or not. Therefore, call directly @freecb if the connectRegisterCloseCallback API is not supported by the driver used by the connection. Signed-off-by: Marc Hartmayer <mhartmay(a)linux.vnet.ibm.com&gt; Reviewed-by: Boris Fiuczynski <fiuczy(a)linux.ibm.com&gt; --- src/libvirt-host.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/src/libvirt-host.c b/src/libvirt-host.c index 7ff7407a0874..cb2ace7d9778 100644 --- a/src/libvirt-host.c +++ b/src/libvirt-host.c @@ -1221,9 +1221,13 @@ virConnectRegisterCloseCallback(virConnectPtr conn, virCheckConnectReturn(conn, -1); virCheckNonNullArgGoto(cb, error); - if (conn->driver->connectRegisterCloseCallback && - conn->driver->connectRegisterCloseCallback(conn, cb, opaque, freecb) < 0) - goto error; + if (conn->driver->connectRegisterCloseCallback) { + if (conn->driver->connectRegisterCloseCallback(conn, cb, opaque, freecb) < 0) + goto error; + } else { + if (freecb) + freecb(opaque); + }

return 0;