[libvirt] [Qemu-devel] [PATCH v6 3/6] monitor: Clean up fd sets on monitor disconnect
Stefan Hajnoczi
stefanha at gmail.com
Tue Aug 7 17:32:07 UTC 2012
On Fri, Aug 03, 2012 at 01:28:06PM -0400, Corey Bryant wrote:
> Each fd set has a boolean that keeps track of whether or not the
> fd set is in use by a monitor connection. When a monitor
> disconnects, all fds that are members of an fd set with refcount
> of zero are closed. This prevents any fd leakage associated with
> a client disconnect prior to using a passed fd.
>
> v5:
> -This patch is new in v5.
> -This support addresses concerns from v4 regarding fd leakage
> if the client disconnects unexpectedly. (eblake at redhat.com,
> kwolf at redhat.com, dberrange at redhat.com)
>
> v6:
> -No changes
>
> Signed-off-by: Corey Bryant <coreyb at linux.vnet.ibm.com>
> ---
> monitor.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
The lifecycle of fdsets and fds isn't clear to me. It seems like just a
refcount in fdset should handle this without extra fields like in_use.
Stefan
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