[libvirt] PATCH: Inform QEMU "prepare" hook of migration in progress
From: Eric Blake <eblake redhat com>
Subject: Re: [libvirt-users] Wanted: method for qemu hook script to know if called for
migration
Date: Mon, 25 Jul 2011 14:17:08 -0600
>As a feature suggestion, it would be nice if that fourth input variable,
>currently "-", was something like "migrate" in this instance.
Yes, that is probably a bug worth fixing.
I would also find it useful for the QEMU "prepare" hook
to be told whether it's being called in the context of a migration.
(In our case, we use that hook to manage shared DRBD storage, and only permit
Primary/Primary mode in the context of a migration.)
The attached 1-line patch supplies the hook with an additional
argument "migration-target" when appropriate.
Submitted as https://bugzilla.redhat.com/show_bug.cgi?id=768054
---
src/qemu/qemu_process.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 9123f4c..ef9f7eb 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2936,7 +2936,7 @@ int qemuProcessStart(virConnectPtr conn,
int hookret;
hookret = virHookCall(VIR_HOOK_DRIVER_QEMU, vm->def->name,
- VIR_HOOK_QEMU_OP_PREPARE, VIR_HOOK_SUBOP_BEGIN, NULL, xml);
+ VIR_HOOK_QEMU_OP_PREPARE, VIR_HOOK_SUBOP_BEGIN, migrateFrom ?
"migration-target" : NULL, xml);
VIR_FREE(xml);
/*
--
1.7.1
--
Adam Tilghman Systems Support / Academic Computing & Media Services
agt(a)ucsd.edu 858-822-0711 University of California, San Diego