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From 7f3efe3ed7d9f6e83323f62ffd020d9762c2fef0 Mon Sep 17 00:00:00 2001
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Message-Id: <7f3efe3ed7d9f6e83323f62ffd020d9762c2fef0@dist-git>
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From: Laine Stump <laine@laine.org>
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Date: Thu, 11 Apr 2019 15:14:52 -0400
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Subject: [PATCH] qemu_hotplug: don't shutdown net device until the guest has
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released it
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For [some unknown reason, possibly/probably pure chance], Net devices
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have been taken offline and their bandwidth tc rules cleared as the
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very first operation when detaching the device. This is contrary to
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every other type of device, where all hostside teardown is delayed
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until we receive the DEVICE_DELETED event back from qemu, indicating
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that the guest has finished with the device.
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This patch delays these two operations until receipt of
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DEVICE_DELETED, which removes an ugly wart from
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qemuDomainDetachDeviceLive(), and also seems to be a more correct
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sequence of events.
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Signed-off-by: Laine Stump <laine@laine.org>
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ACKed-by: Peter Krempa <pkrempa@redhat.com>
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(cherry picked from commit 34086fc59e7c59148409d6780176e84d0f1dbfb4)
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Partially-Resolves: https://bugzilla.redhat.com/1658198
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Signed-off-by: Laine Stump <laine@redhat.com>
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Signed-off-by: Laine Stump <laine@laine.org>
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Message-Id: <20190411191453.24055-41-laine@redhat.com>
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Acked-by: Michal Privoznik <mprivozn@redhat.com>
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---
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src/qemu/qemu_hotplug.c | 50 +++++++++--------------------------------
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1 file changed, 11 insertions(+), 39 deletions(-)
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diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
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index 27d09d173b..ff88a827dd 100644
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--- a/src/qemu/qemu_hotplug.c
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+++ b/src/qemu/qemu_hotplug.c
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@@ -4287,6 +4287,17 @@ qemuDomainRemoveNetDevice(virQEMUDriverPtr driver,
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!(charDevAlias = qemuAliasChardevFromDevAlias(net->info.alias)))
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goto cleanup;
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+ if (virDomainNetGetActualBandwidth(net) &&
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+ virNetDevSupportBandwidth(virDomainNetGetActualType(net)) &&
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+ virNetDevBandwidthClear(net->ifname) < 0)
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+ VIR_WARN("cannot clear bandwidth setting for device : %s",
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+ net->ifname);
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+
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+ /* deactivate the tap/macvtap device on the host, which could also
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+ * affect the parent device (e.g. macvtap passthrough mode sets
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+ * the parent device offline)
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+ */
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+ ignore_value(qemuInterfaceStopDevice(net));
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qemuDomainObjEnterMonitor(driver, vm);
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if (qemuMonitorRemoveNetdev(priv->mon, hostnet_name) < 0) {
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@@ -5249,34 +5260,6 @@ qemuDomainDetachPrepNet(virDomainObjPtr vm,
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}
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-static void
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-qemuDomainDetachShutdownNet(virDomainNetDefPtr net)
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-{
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-/*
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- * These operations are in a separate function from
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- * qemuDomainDetachPrepNet() because they can't be done until after
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- * we've validated that this device really can be removed - in
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- * particular we need to check for multifunction PCI devices and
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- * presence of a device alias, which isn't done until *after* the
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- * return from qemuDomainDetachPrepNet(). Since we've already passed
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- * the "point of no return", we ignore any errors, and trudge ahead
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- * with shutting down and detaching the device even if there is an
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- * error in one of these functions.
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- */
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- if (virDomainNetGetActualBandwidth(net) &&
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- virNetDevSupportBandwidth(virDomainNetGetActualType(net)) &&
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- virNetDevBandwidthClear(net->ifname) < 0)
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- VIR_WARN("cannot clear bandwidth setting for device : %s",
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- net->ifname);
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-
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- /* deactivate the tap/macvtap device on the host, which could also
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- * affect the parent device (e.g. macvtap passthrough mode sets
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- * the parent device offline)
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- */
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- ignore_value(qemuInterfaceStopDevice(net));
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-}
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-
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-
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static int
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qemuDomainDetachDeviceChr(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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@@ -5607,17 +5590,6 @@ qemuDomainDetachDeviceLive(virDomainObjPtr vm,
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return -1;
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}
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-
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- /*
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- * Do any device-specific shutdown that should be
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- * done after all validation checks, but before issuing the qemu
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- * command to delete the device. For now, the only type of device
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- * that has such shutdown needs is the net device.
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- */
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- if (detach.type == VIR_DOMAIN_DEVICE_NET)
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- qemuDomainDetachShutdownNet(detach.data.net);
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-
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-
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/*
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* Issue the qemu monitor command to delete the device (based on
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* its alias), and optionally wait a short time in case the
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--
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2.21.0
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