From: Eugenio Pérez Date: Thu, 25 Nov 2021 10:16:13 +0000 (+0100) Subject: vdpa: Add dummy receive callback X-Git-Tag: v6.2.0-rc3~5^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=846a1e85da646c6006db429648389fc110f92d75;p=thirdparty%2Fqemu.git vdpa: Add dummy receive callback Qemu falls back on userland handlers even if vhost-user and vhost-vdpa cases. These assumes a tap device can handle the packets. If a vdpa device fail to start, it can trigger a sigsegv because of that. Add dummy receiver that returns no progress so it can keep running. Fixes: 1e0a84ea49 ("vhost-vdpa: introduce vhost-vdpa net client") Signed-off-by: Eugenio Pérez Message-Id: <20211125101614.76927-2-eperezma@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang --- diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 2e3c22a8c7d..25dd6dd9754 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -170,9 +170,17 @@ static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, return true; } +/** Dummy receive in case qemu falls back to userland tap networking */ +static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, + size_t size) +{ + return 0; +} + static NetClientInfo net_vhost_vdpa_info = { .type = NET_CLIENT_DRIVER_VHOST_VDPA, .size = sizeof(VhostVDPAState), + .receive = vhost_vdpa_receive, .cleanup = vhost_vdpa_cleanup, .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, .has_ufo = vhost_vdpa_has_ufo,