[libvirt] [PATCH] Always close drivers when a virConnectPtr is released

Eric Blake eblake at redhat.com
Wed Nov 24 17:47:36 UTC 2010

On 11/24/2010 10:30 AM, Matthias Bolte wrote:
> virConnectClose calls virUnrefConnect which in turn closes
> all open drivers when the refcount of that connection dropped
> to zero. This works fine when you free all other objects that
> hold a ref to the connection before you close it, because in
> this case virUnrefConnect is the one that removes the last
> ref to the connection.
> But it doesn't work when you close the connection first before
> freeing the other objects. This is because the other virUnref*
> functions call virReleaseConnect when they detect that the
> connection's refcount dropped to zero. In this case another
> virUnref* function (different from virUnrefConnect) removes the
> last ref to the connection. This results in not closing the
> open drivers and leaking things that should have been cleaned
> up in the driver close functions.
> To fix this move the driver close calls to virReleaseConnect.
> ---
>  src/datatypes.c |   47 +++++++++++++++++++++++------------------------
>  1 files changed, 23 insertions(+), 24 deletions(-)

ACK - virUnrefConnect still cleans up, by virtue of calling
virReleaseConnect, but now anything else that also releases the
connection also gets to clean up.

Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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