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[PATCH v2 12/15] virtio-net: Store failover primary opts pointer locally
From: |
Kevin Wolf |
Subject: |
[PATCH v2 12/15] virtio-net: Store failover primary opts pointer locally |
Date: |
Fri, 8 Oct 2021 15:34:39 +0200 |
Instead of accessing the global QemuOptsList, which really belong to the
command line parser and shouldn't be accessed from devices, store a
pointer to the QemuOpts in a new VirtIONet field.
This is not the final state, but just an intermediate step to get rid of
QemuOpts in devices. It will later be replaced with an options QDict.
Before this patch, two "primary" devices could be hidden for the same
standby device, but only one of them would actually be enabled and the
other one would be kept hidden forever, so this doesn't make sense.
After this patch, configuring a second primary device is an error.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
include/hw/virtio/virtio-net.h | 1 +
hw/net/virtio-net.c | 26 ++++++++++++++++++--------
2 files changed, 19 insertions(+), 8 deletions(-)
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index 824a69c23f..d118c95f69 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -209,6 +209,7 @@ struct VirtIONet {
bool failover_primary_hidden;
bool failover;
DeviceListener primary_listener;
+ QemuOpts *primary_opts;
Notifier migration_state;
VirtioNetRssData rss_data;
struct NetRxPkt *rx_pkt;
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index a17d5739fc..ed9a9012e9 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -858,27 +858,24 @@ static DeviceState
*failover_find_primary_device(VirtIONet *n)
static void failover_add_primary(VirtIONet *n, Error **errp)
{
Error *err = NULL;
- QemuOpts *opts;
- char *id;
DeviceState *dev = failover_find_primary_device(n);
if (dev) {
return;
}
- id = failover_find_primary_device_id(n);
- if (!id) {
+ if (!n->primary_opts) {
error_setg(errp, "Primary device not found");
error_append_hint(errp, "Virtio-net failover will not work. Make "
"sure primary device has parameter"
" failover_pair_id=%s\n", n->netclient_name);
return;
}
- opts = qemu_opts_find(qemu_find_opts("device"), id);
- g_assert(opts); /* cannot be NULL because id was found using opts list */
- dev = qdev_device_add(opts, &err);
+
+ dev = qdev_device_add(n->primary_opts, &err);
if (err) {
- qemu_opts_del(opts);
+ qemu_opts_del(n->primary_opts);
+ n->primary_opts = NULL;
} else {
object_unref(OBJECT(dev));
}
@@ -3317,6 +3314,19 @@ static bool failover_hide_primary_device(DeviceListener
*listener,
return false;
}
+ if (n->primary_opts) {
+ error_setg(errp, "Cannot attach more than one primary device to '%s'",
+ n->netclient_name);
+ return false;
+ }
+
+ /*
+ * Having a weak reference here should be okay because a device can't be
+ * deleted while it's hidden. This will be replaced soon with a QDict that
+ * has a clearer ownership model.
+ */
+ n->primary_opts = device_opts;
+
/* failover_primary_hidden is set during feature negotiation */
return qatomic_read(&n->failover_primary_hidden);
}
--
2.31.1
- Re: [PATCH v2 09/15] softmmu/qdev-monitor: add error handling in qdev_set_id, (continued)
[PATCH v2 05/15] iotests/245: Fix type for iothread property, Kevin Wolf, 2021/10/08
[PATCH v2 10/15] qemu-option: Allow deleting opts during qemu_opts_foreach(), Kevin Wolf, 2021/10/08
[PATCH v2 08/15] qdev: Make DeviceState.id independent of QemuOpts, Kevin Wolf, 2021/10/08
[PATCH v2 13/15] virtio-net: Avoid QemuOpts in failover_find_primary_device(), Kevin Wolf, 2021/10/08
[PATCH v2 11/15] qdev: Add Error parameter to hide_device() callbacks, Kevin Wolf, 2021/10/08
[PATCH v2 12/15] virtio-net: Store failover primary opts pointer locally,
Kevin Wolf <=
[PATCH v2 14/15] qdev: Base object creation on QDict rather than QemuOpts, Kevin Wolf, 2021/10/08
[PATCH v2 15/15] vl: Enable JSON syntax for -device, Kevin Wolf, 2021/10/08
Re: [PATCH v2 00/15] qdev: Add JSON -device, Michael S. Tsirkin, 2021/10/13
Re: [PATCH v2 00/15] qdev: Add JSON -device, Peter Krempa, 2021/10/15
Re: [PATCH v2 00/15] qdev: Add JSON -device, Kevin Wolf, 2021/10/15