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[Xen-devel] [PATCH] Serialize iptables calls in hotplug scripts
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] [PATCH] Serialize iptables calls in hotplug scripts |
| From: | Jiri Denemark <jdenemar@xxxxxxxxxx> |
| Date: | Thu, 28 May 2009 11:41:24 +0200 |
| Delivery-date: | Thu, 28 May 2009 02:42:30 -0700 |
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| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| User-agent: | Mutt/1.5.18 (2008-05-17) |
Hi, iptables cannot correctly handle situations when more than one command is trying to set netfilter rules. In such situations, iptables may fail with EAGAIN, which results in iptables: Unknown error 18446744073709551615. Such situation can easily happen when multiple network devices are configured for a domain as vif hotplug scripts are called in parallel for all of the network devices. Attached is a patch which serializes all iptables calls from vif-* hotplug scripts... Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
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