Re: [libvirt PATCH] qemu: use stop reason as 'extra' field

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On Sat, Mar 11, 2023 at 01:08:33AM +0000, Mike Pontillo wrote:
This adds the reason the domain stopped to the 'extra' field, which
will be sent to the 'qemu' hook script (if defined).

Signed-off-by: Mike Pontillo <mpontillo@xxxxxxxxxxxxxxxx>

---

Our hook processor often needs to know the reason why a guest stopped. I
am propsing this change in case other hook processing implementations
could also benefit from this information.

I think this might be beneficial for other as well.  Just few things I
noticed:

1) This should be captured in documentation as well so that
   libvirt.org/hooks.html mentions this

2) Maybe we could come up with some simple key=value format for the
   extra parameter so that it is extensible, although not many extending
   was done in these parts

---
src/qemu/qemu_process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index be418ad8e6..425b73c37e 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -8432,7 +8432,7 @@ void qemuProcessStop(virQEMUDriver *driver,
        /* we can't stop the operation even if the script raised an error */
        ignore_value(virHookCall(VIR_HOOK_DRIVER_QEMU, vm->def->name,
                                 VIR_HOOK_QEMU_OP_STOPPED, VIR_HOOK_SUBOP_END,
-                                 NULL, xml, NULL));
+                                 virDomainShutoffReasonTypeToString(reason), xml, NULL));
    }

    /* Reset Security Labels unless caller don't want us to */
--
2.34.1

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