[libvirt] [PATCH v4] qemu: Connect to guest agent iff needed
Michal Privoznik
mprivozn at redhat.com
Mon Jan 25 11:20:13 UTC 2016
On 18.01.2016 11:54, Michal Privoznik wrote:
> https://bugzilla.redhat.com/show_bug.cgi?id=1293351
>
> Since we already have virtio channel events, we know when guest
> agent within guest has (dis-)connected. Instead of us blindly
> connecting to a socket that no one is listening to, we can just
> follow what qemu-ga does. This has a nice benefit that we don't
> need to 'guest-ping' the agent just to timeout and find out
> nobody is listening.
>
> The way that this commit is implemented:
> - don't connect in qemuProcessStart directly, defer that to event
> callback (which already follows the agent).
> - after migration is settled, before we resume vCPUs, ask qemu
> whether somebody is listening on the socket and if so, connect
> to it.
>
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
>
> diff to v3:
> -Move cap detection into qemuConnectAgent
>
> src/qemu/qemu_driver.c | 13 ++++++++++++-
> src/qemu/qemu_migration.c | 12 ++++++++++++
> src/qemu/qemu_process.c | 24 ++++++++++++++++++++++++
> 3 files changed, 48 insertions(+), 1 deletion(-)
ping
Michal
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