Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
netdevsim: add loopback support
Support device loopback. Apparently this mode has been historically
supported by the toeplitz test and I don't have any HW which lets
me test the conversion..
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20251120021024.2944527-12-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+12
-5
+12
-5
drivers/net/netdevsim/netdev.c
+12
-5
drivers/net/netdevsim/netdev.c
···
133
133
if (!nsim_ipsec_tx(ns, skb))
134
134
goto out_drop_any;
135
135
136
-
peer_ns = rcu_dereference(ns->peer);
137
-
if (!peer_ns)
138
-
goto out_drop_any;
136
+
/* Check if loopback mode is enabled */
137
+
if (dev->features & NETIF_F_LOOPBACK) {
138
+
peer_ns = ns;
139
+
peer_dev = dev;
140
+
} else {
141
+
peer_ns = rcu_dereference(ns->peer);
142
+
if (!peer_ns)
143
+
goto out_drop_any;
144
+
peer_dev = peer_ns->netdev;
145
+
}
139
146
140
147
dr = nsim_do_psp(skb, ns, peer_ns, &psp_ext);
141
148
if (dr)
142
149
goto out_drop_free;
143
150
144
-
peer_dev = peer_ns->netdev;
145
151
rxq = skb_get_queue_mapping(skb);
146
152
if (rxq >= peer_dev->num_rx_queues)
147
153
rxq = rxq % peer_dev->num_rx_queues;
···
982
976
NETIF_F_FRAGLIST |
983
977
NETIF_F_HW_CSUM |
984
978
NETIF_F_LRO |
985
-
NETIF_F_TSO;
979
+
NETIF_F_TSO |
980
+
NETIF_F_LOOPBACK;
986
981
dev->pcpu_stat_type = NETDEV_PCPU_STAT_DSTATS;
987
982
dev->max_mtu = ETH_MAX_MTU;
988
983
dev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_HW_OFFLOAD;