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* [PATCH] vfio-user: reject failover during init
@ 2026-08-13  9:30 Hugo Komatsu
  2026-08-13 10:08 ` John Levon
  0 siblings, 1 reply; 2+ messages in thread
From: Hugo Komatsu @ 2026-08-13  9:30 UTC (permalink / raw)
  To: John Levon, Thanos Makatos, Cédric Le Goater,
	qemu-devel@nongnu.org
  Cc: Hugo Komatsu

Virtio-net failover is a networking feature that relies on a primary
and standby device pair. This is not currently supported for vfio-user.
Refuse initialization if this property is set.

Change-Id: I80989ddb08a1cd3eba84bcf9b0edc26cb4a65669
Signed-off-by: Hugo Komatsu <hugo.komatsu@nutanix.com>
---
 hw/vfio-user/pci.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/vfio-user/pci.c b/hw/vfio-user/pci.c
index ecc59a9642..34fa2f22b3 100644
--- a/hw/vfio-user/pci.c
+++ b/hw/vfio-user/pci.c
@@ -251,6 +251,11 @@ static void vfio_user_pci_realize(PCIDevice *pdev, Error **errp)
         return;
     }
 
+    if (pdev->failover_pair_id) {
+        error_setg(errp, "vfio-user: failover is not supported");
+        return;
+    }
+
     sock_name = udev->socket->u.q_unix.path;
 
     vbasedev->name = g_strdup_printf("vfio-user:%s", sock_name);
-- 
2.39.3


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2026-08-13  9:30 [PATCH] vfio-user: reject failover during init Hugo Komatsu
2026-08-13 10:08 ` John Levon

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