linux-kernel - [PATCH] vdpa_sim_net: should not drop the multicast/broadcast packet

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Message-Id: <20221214054306.24145-1-lulu@redhat.com>
Date:   Wed, 14 Dec 2022 13:43:06 +0800
From:   Cindy Lu <lulu@...hat.com>
To:     mst@...hat.com, jasowang@...hat.com, lulu@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] vdpa_sim_net: should not drop the multicast/broadcast packet

In the receive_filter(), should not drop the packet with the
broadcast/multicast address. Add the check for this

Signed-off-by: Cindy Lu <lulu@...hat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
index c3cb225ea469..0f4739c31eea 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
@@ -62,6 +62,9 @@ static bool receive_filter(struct vdpasim *vdpasim, size_t len)
 	if (len < ETH_ALEN + hdr_len)
 		return false;
 
+	if (is_broadcast_ether_addr(vdpasim->buffer + hdr_len) ||
+	    is_multicast_ether_addr(vdpasim->buffer + hdr_len))
+		return true;
 	if (!strncmp(vdpasim->buffer + hdr_len, vio_config->mac, ETH_ALEN))
 		return true;
 
-- 
2.34.3