qemu-kvm/kvm-failover-Remove-primary_dev-member.patch

From 52dce3568320900c79e34eb2093058e5c3f60aa9 Mon Sep 17 00:00:00 2001
From: Laurent Vivier <lvivier@redhat.com>
Date: Thu, 25 Feb 2021 23:14:46 -0500
Subject: [PATCH 49/54] failover: Remove primary_dev member

RH-Author: Laurent Vivier <lvivier@redhat.com>
Message-id: <20210225231447.2187738-27-lvivier@redhat.com>
Patchwork-id: 101250
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH v2 26/27] failover: Remove primary_dev member
Bugzilla: 1819991
RH-Acked-by: Juan Quintela <quintela@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>

From: Juan Quintela <quintela@redhat.com>

BZ: https://bugzilla.redhat.com/1819991
BRANCH: rhel-av-8.4.0
UPSTREAM: Merged

Only three uses remained, and we can remove them on that case.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20201118083748.1328-28-quintela@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 21e8709b29cd981c74565e75276ed476c954cbbf)
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/net/virtio-net.c            | 55 +++++++++++++++-------------------
 include/hw/virtio/virtio-net.h |  1 -
 2 files changed, 24 insertions(+), 32 deletions(-)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 9203d81780..044ac95f6f 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -832,13 +832,31 @@ static char *failover_find_primary_device_id(VirtIONet *n)
     return fid.id;
 }
 
+/**
+ * Find the primary device for this failover virtio-net
+ *
+ * @n: VirtIONet device
+ * @errp: returns an error if this function fails
+ */
+static DeviceState *failover_find_primary_device(VirtIONet *n)
+{
+    char *id = failover_find_primary_device_id(n);
+
+    if (!id) {
+        return NULL;
+    }
+
+    return qdev_find_recursive(sysbus_get_default(), id);
+}
+
 static void failover_add_primary(VirtIONet *n, Error **errp)
 {
     Error *err = NULL;
     QemuOpts *opts;
     char *id;
+    DeviceState *dev = failover_find_primary_device(n);
 
-    if (n->primary_dev) {
+    if (dev) {
         return;
     }
 
@@ -848,7 +866,7 @@ static void failover_add_primary(VirtIONet *n, Error **errp)
     }
     opts = qemu_opts_find(qemu_find_opts("device"), id);
     if (opts) {
-        n->primary_dev = qdev_device_add(opts, &err);
+        dev = qdev_device_add(opts, &err);
         if (err) {
             qemu_opts_del(opts);
         }
@@ -861,23 +879,6 @@ static void failover_add_primary(VirtIONet *n, Error **errp)
     error_propagate(errp, err);
 }
 
-/**
- * Find the primary device for this failover virtio-net
- *
- * @n: VirtIONet device
- * @errp: returns an error if this function fails
- */
-static DeviceState *failover_find_primary_device(VirtIONet *n)
-{
-    char *id = failover_find_primary_device_id(n);
-
-    if (!id) {
-        return NULL;
-    }
-
-    return qdev_find_recursive(sysbus_get_default(), id);
-}
-
 static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
 {
     VirtIONet *n = VIRTIO_NET(vdev);
@@ -933,19 +934,9 @@ static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
         qatomic_set(&n->failover_primary_hidden, false);
         failover_add_primary(n, &err);
         if (err) {
-            n->primary_dev = failover_find_primary_device(n);
-            failover_add_primary(n, &err);
-            if (err) {
-                goto out_err;
-            }
+            warn_report_err(err);
         }
     }
-    return;
-
-out_err:
-    if (err) {
-        warn_report_err(err);
-    }
 }
 
 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
@@ -3420,13 +3411,15 @@ static int virtio_net_pre_save(void *opaque)
 static bool primary_unplug_pending(void *opaque)
 {
     DeviceState *dev = opaque;
+    DeviceState *primary;
     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;
+    primary = failover_find_primary_device(n);
+    return primary ? primary->pending_deleted_event : false;
 }
 
 static bool dev_unplug_pending(void *opaque)
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index efef64e02f..7e96d193aa 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -202,7 +202,6 @@ struct VirtIONet {
     AnnounceTimer announce_timer;
     bool needs_vnet_hdr_swap;
     bool mtu_bypass_backend;
-    DeviceState *primary_dev;
     /* primary failover device is hidden*/
     bool failover_primary_hidden;
     bool failover;
-- 
2.27.0