* [PULL 1/4] net/virtio: fix dev_unplug_pending
2019-11-25 15:40 [PULL 0/4] Net patches Jason Wang
@ 2019-11-25 15:40 ` Jason Wang
2019-11-25 15:40 ` [PULL 2/4] net/virtio: return early when failover primary alread added Jason Wang
` (3 subsequent siblings)
4 siblings, 0 replies; 12+ messages in thread
From: Jason Wang @ 2019-11-25 15:40 UTC (permalink / raw)
To: peter.maydell; +Cc: Jason Wang, Jens Freimann, qemu-devel
From: Jens Freimann <jfreimann@redhat.com>
.dev_unplug_pending is set up by virtio-net code indepent of failover
support was set for the device or not. This gives a wrong result when
we check for existing primary devices in migration code.
Fix this by actually calling dev_unplug_pending() instead of just
checking if the function pointer was set. When the feature was not
negotiated dev_unplug_pending() will always return false. This prevents
us from going into the wait-unplug state when there's no primary device
present.
Fixes: 9711cd0dfc3f ("net/virtio: add failover support")
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
hw/net/virtio-net.c | 3 +++
migration/savevm.c | 3 ++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 97a5113..946039c 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -3124,6 +3124,9 @@ static bool primary_unplug_pending(void *opaque)
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIONet *n = VIRTIO_NET(vdev);
+ if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_STANDBY)) {
+ return false;
+ }
return n->primary_dev ? n->primary_dev->pending_deleted_event : false;
}
diff --git a/migration/savevm.c b/migration/savevm.c
index 966a9c3..a71b930 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1119,7 +1119,8 @@ int qemu_savevm_nr_failover_devices(void)
int n = 0;
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
- if (se->vmsd && se->vmsd->dev_unplug_pending) {
+ if (se->vmsd && se->vmsd->dev_unplug_pending &&
+ se->vmsd->dev_unplug_pending(se->opaque)) {
n++;
}
}
--
2.5.0
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PULL 2/4] net/virtio: return early when failover primary alread added
2019-11-25 15:40 [PULL 0/4] Net patches Jason Wang
2019-11-25 15:40 ` [PULL 1/4] net/virtio: fix dev_unplug_pending Jason Wang
@ 2019-11-25 15:40 ` Jason Wang
2019-11-25 15:40 ` [PULL 3/4] net/virtio: fix re-plugging of primary device Jason Wang
` (2 subsequent siblings)
4 siblings, 0 replies; 12+ messages in thread
From: Jason Wang @ 2019-11-25 15:40 UTC (permalink / raw)
To: peter.maydell; +Cc: Jason Wang, Jens Freimann, qemu-devel
From: Jens Freimann <jfreimann@redhat.com>
Bail out when primary device was already added before.
This avoids printing a wrong warning message during reboot.
Fixes: 9711cd0dfc3f ("net/virtio: add failover support")
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
hw/net/virtio-net.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 946039c..ac4d191 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -759,6 +759,10 @@ static void failover_add_primary(VirtIONet *n, Error **errp)
{
Error *err = NULL;
+ if (n->primary_dev) {
+ return;
+ }
+
n->primary_device_opts = qemu_opts_find(qemu_find_opts("device"),
n->primary_device_id);
if (n->primary_device_opts) {
--
2.5.0
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PULL 3/4] net/virtio: fix re-plugging of primary device
2019-11-25 15:40 [PULL 0/4] Net patches Jason Wang
2019-11-25 15:40 ` [PULL 1/4] net/virtio: fix dev_unplug_pending Jason Wang
2019-11-25 15:40 ` [PULL 2/4] net/virtio: return early when failover primary alread added Jason Wang
@ 2019-11-25 15:40 ` Jason Wang
2019-11-25 15:40 ` [PULL 4/4] net/virtio: return error when device_opts arg is NULL Jason Wang
2019-11-26 12:36 ` [PULL 0/4] Net patches Peter Maydell
4 siblings, 0 replies; 12+ messages in thread
From: Jason Wang @ 2019-11-25 15:40 UTC (permalink / raw)
To: peter.maydell; +Cc: Jason Wang, Jens Freimann, qemu-devel
From: Jens Freimann <jfreimann@redhat.com>
failover_replug_primary was returning true on failure which lead to
re-plug not working when a migration failed. Fix this by returning
success when hotplug worked. This is a bug that was missed in last
round of testing but was tested succesfully with this version. Also
make sure we don't pass NULL to qdev_set_parent_bus().
This fixes CID 1407224.
Fixes: 9711cd0dfc3f ("net/virtio: add failover support")
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
hw/net/virtio-net.c | 42 +++++++++++++++++++++++++-----------------
1 file changed, 25 insertions(+), 17 deletions(-)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index ac4d191..565dea0 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -2805,25 +2805,33 @@ static bool failover_replug_primary(VirtIONet *n, Error **errp)
n->primary_device_opts = qemu_opts_from_qdict(
qemu_find_opts("device"),
n->primary_device_dict, errp);
- }
- if (n->primary_device_opts) {
- if (n->primary_dev) {
- n->primary_bus = n->primary_dev->parent_bus;
- }
- qdev_set_parent_bus(n->primary_dev, n->primary_bus);
- n->primary_should_be_hidden = false;
- qemu_opt_set_bool(n->primary_device_opts,
- "partially_hotplugged", true, errp);
- hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
- if (hotplug_ctrl) {
- hotplug_handler_pre_plug(hotplug_ctrl, n->primary_dev, errp);
- hotplug_handler_plug(hotplug_ctrl, n->primary_dev, errp);
+ if (!n->primary_device_opts) {
+ error_setg(errp, "virtio_net: couldn't find primary device opts");
+ goto out;
}
- if (!n->primary_dev) {
+ }
+ if (!n->primary_dev) {
error_setg(errp, "virtio_net: couldn't find primary device");
- }
+ goto out;
}
- return *errp != NULL;
+
+ n->primary_bus = n->primary_dev->parent_bus;
+ if (!n->primary_bus) {
+ error_setg(errp, "virtio_net: couldn't find primary bus");
+ goto out;
+ }
+ qdev_set_parent_bus(n->primary_dev, n->primary_bus);
+ n->primary_should_be_hidden = false;
+ qemu_opt_set_bool(n->primary_device_opts,
+ "partially_hotplugged", true, errp);
+ hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
+ if (hotplug_ctrl) {
+ hotplug_handler_pre_plug(hotplug_ctrl, n->primary_dev, errp);
+ hotplug_handler_plug(hotplug_ctrl, n->primary_dev, errp);
+ }
+
+out:
+ return *errp == NULL;
}
static void virtio_net_handle_migration_primary(VirtIONet *n,
@@ -2852,7 +2860,7 @@ static void virtio_net_handle_migration_primary(VirtIONet *n,
warn_report("couldn't unplug primary device");
}
} else if (migration_has_failed(s)) {
- /* We already unplugged the device let's plugged it back */
+ /* We already unplugged the device let's plug it back */
if (!failover_replug_primary(n, &err)) {
if (err) {
error_report_err(err);
--
2.5.0
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PULL 4/4] net/virtio: return error when device_opts arg is NULL
2019-11-25 15:40 [PULL 0/4] Net patches Jason Wang
` (2 preceding siblings ...)
2019-11-25 15:40 ` [PULL 3/4] net/virtio: fix re-plugging of primary device Jason Wang
@ 2019-11-25 15:40 ` Jason Wang
2019-11-25 16:08 ` Paolo Bonzini
2019-11-26 12:36 ` [PULL 0/4] Net patches Peter Maydell
4 siblings, 1 reply; 12+ messages in thread
From: Jason Wang @ 2019-11-25 15:40 UTC (permalink / raw)
To: peter.maydell; +Cc: Jason Wang, Jens Freimann, qemu-devel
From: Jens Freimann <jfreimann@redhat.com>
This fixes CID 1407222.
Fixes: 9711cd0dfc3f ("net/virtio: add failover support")
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
hw/net/virtio-net.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 565dea0..3c31471 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -2880,9 +2880,12 @@ static int virtio_net_primary_should_be_hidden(DeviceListener *listener,
QemuOpts *device_opts)
{
VirtIONet *n = container_of(listener, VirtIONet, primary_listener);
- bool match_found;
- bool hide;
+ bool match_found = false;
+ bool hide = false;
+ if (!device_opts) {
+ return -1;
+ }
n->primary_device_dict = qemu_opts_to_qdict(device_opts,
n->primary_device_dict);
if (n->primary_device_dict) {
@@ -2890,7 +2893,7 @@ static int virtio_net_primary_should_be_hidden(DeviceListener *listener,
n->standby_id = g_strdup(qdict_get_try_str(n->primary_device_dict,
"failover_pair_id"));
}
- if (device_opts && g_strcmp0(n->standby_id, n->netclient_name) == 0) {
+ if (g_strcmp0(n->standby_id, n->netclient_name) == 0) {
match_found = true;
} else {
match_found = false;
--
2.5.0
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PULL 4/4] net/virtio: return error when device_opts arg is NULL
2019-11-25 15:40 ` [PULL 4/4] net/virtio: return error when device_opts arg is NULL Jason Wang
@ 2019-11-25 16:08 ` Paolo Bonzini
0 siblings, 0 replies; 12+ messages in thread
From: Paolo Bonzini @ 2019-11-25 16:08 UTC (permalink / raw)
To: Jason Wang, peter.maydell; +Cc: Jens Freimann, qemu-devel
On 25/11/19 16:40, Jason Wang wrote:
> From: Jens Freimann <jfreimann@redhat.com>
>
> This fixes CID 1407222.
>
> Fixes: 9711cd0dfc3f ("net/virtio: add failover support")
> Signed-off-by: Jens Freimann <jfreimann@redhat.com>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
> hw/net/virtio-net.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
> index 565dea0..3c31471 100644
> --- a/hw/net/virtio-net.c
> +++ b/hw/net/virtio-net.c
> @@ -2880,9 +2880,12 @@ static int virtio_net_primary_should_be_hidden(DeviceListener *listener,
> QemuOpts *device_opts)
> {
> VirtIONet *n = container_of(listener, VirtIONet, primary_listener);
> - bool match_found;
> - bool hide;
> + bool match_found = false;
> + bool hide = false;
>
> + if (!device_opts) {
> + return -1;
> + }
> n->primary_device_dict = qemu_opts_to_qdict(device_opts,
> n->primary_device_dict);
> if (n->primary_device_dict) {
> @@ -2890,7 +2893,7 @@ static int virtio_net_primary_should_be_hidden(DeviceListener *listener,
> n->standby_id = g_strdup(qdict_get_try_str(n->primary_device_dict,
> "failover_pair_id"));
> }
> - if (device_opts && g_strcmp0(n->standby_id, n->netclient_name) == 0) {
> + if (g_strcmp0(n->standby_id, n->netclient_name) == 0) {
> match_found = true;
> } else {
> match_found = false;
>
It can't be NULL though, can it? It is called from a qemu_foreach_opt
callback on device_opts itself. This can be "re-fixed" in 5.0 though,
no hurry.
Paolo
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PULL 0/4] Net patches
2019-11-25 15:40 [PULL 0/4] Net patches Jason Wang
` (3 preceding siblings ...)
2019-11-25 15:40 ` [PULL 4/4] net/virtio: return error when device_opts arg is NULL Jason Wang
@ 2019-11-26 12:36 ` Peter Maydell
4 siblings, 0 replies; 12+ messages in thread
From: Peter Maydell @ 2019-11-26 12:36 UTC (permalink / raw)
To: Jason Wang; +Cc: QEMU Developers
On Mon, 25 Nov 2019 at 15:40, Jason Wang <jasowang@redhat.com> wrote:
>
> The following changes since commit 122e6d2a9c1bf8aa1d51409c15809a82621515b1:
>
> Merge remote-tracking branch 'remotes/gkurz/tags/9p-fix-2019-11-23' into staging (2019-11-25 13:39:45 +0000)
>
> are available in the git repository at:
>
> https://github.com/jasowang/qemu.git tags/net-pull-request
>
> for you to fetch changes up to 4d0e59ace29277b2faa5b33c719be9baaa659093:
>
> net/virtio: return error when device_opts arg is NULL (2019-11-25 23:30:29 +0800)
>
> ----------------------------------------------------------------
>
> ----------------------------------------------------------------
> Jens Freimann (4):
> net/virtio: fix dev_unplug_pending
> net/virtio: return early when failover primary alread added
> net/virtio: fix re-plugging of primary device
> net/virtio: return error when device_opts arg is NULL
>
> hw/net/virtio-net.c | 58 +++++++++++++++++++++++++++++++++++------------------
> migration/savevm.c | 3 ++-
> 2 files changed, 40 insertions(+), 21 deletions(-)
Applied, thanks.
Please update the changelog at https://wiki.qemu.org/ChangeLog/4.2
for any user-visible changes.
-- PMM
^ permalink raw reply [flat|nested] 12+ messages in thread