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[PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug
From: |
Julia Suvorova |
Subject: |
[PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug |
Date: |
Wed, 15 Jan 2020 23:40:25 +0100 |
Hot-unplug takes some time due to communication with the guest.
Do not change the device while freeing up resources.
Signed-off-by: Julia Suvorova <address@hidden>
---
balloon.c | 2 +-
hw/virtio/virtio-balloon.c | 9 ++++++++-
include/sysemu/balloon.h | 2 +-
3 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/balloon.c b/balloon.c
index f104b42961..998ec53a0f 100644
--- a/balloon.c
+++ b/balloon.c
@@ -119,5 +119,5 @@ void qmp_balloon(int64_t target, Error **errp)
}
trace_balloon_event(balloon_opaque, target);
- balloon_event_fn(balloon_opaque, target);
+ balloon_event_fn(balloon_opaque, target, errp);
}
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 57f3b9f22d..0fa4e4454b 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -717,12 +717,19 @@ static void virtio_balloon_stat(void *opaque, BalloonInfo
*info)
VIRTIO_BALLOON_PFN_SHIFT);
}
-static void virtio_balloon_to_target(void *opaque, ram_addr_t target)
+static void virtio_balloon_to_target(void *opaque, ram_addr_t target,
+ Error **errp)
{
+ DeviceState *bus_dev = qdev_get_bus_device(DEVICE(opaque));
VirtIOBalloon *dev = VIRTIO_BALLOON(opaque);
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
ram_addr_t vm_ram_size = get_current_ram_size();
+ if (bus_dev && bus_dev->pending_deleted_event) {
+ error_setg(errp, "Hot-unplug of %s is in progress", vdev->name);
+ return;
+ }
+
if (target > vm_ram_size) {
target = vm_ram_size;
}
diff --git a/include/sysemu/balloon.h b/include/sysemu/balloon.h
index aea0c44985..b3a09ca946 100644
--- a/include/sysemu/balloon.h
+++ b/include/sysemu/balloon.h
@@ -17,7 +17,7 @@
#include "exec/cpu-common.h"
#include "qapi/qapi-types-misc.h"
-typedef void (QEMUBalloonEvent)(void *opaque, ram_addr_t target);
+typedef void (QEMUBalloonEvent)(void *opaque, ram_addr_t target, Error **errp);
typedef void (QEMUBalloonStatus)(void *opaque, BalloonInfo *info);
int qemu_add_balloon_handler(QEMUBalloonEvent *event_func,
--
2.24.1
- [PATCH 0/2] virtio-balloon: Reject qmp_balloon during hot-unplug, Julia Suvorova, 2020/01/15
- [PATCH 1/2] qdev: Introduce qdev_get_bus_device, Julia Suvorova, 2020/01/15
- [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug,
Julia Suvorova <=
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, David Hildenbrand, 2020/01/16
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, Julia Suvorova, 2020/01/23
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, David Hildenbrand, 2020/01/23
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, Julia Suvorova, 2020/01/23
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, David Hildenbrand, 2020/01/27
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, Michael S. Tsirkin, 2020/01/27
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, Julia Suvorova, 2020/01/27
- Re: [PATCH 2/2] virtio-balloon: Reject qmp_balloon during hot-unplug, Michael S. Tsirkin, 2020/01/27