diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2025-11-19 18:10:23 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-11-20 18:19:30 -0800 |
| commit | 358008f41d9b893f0c843cb8b941954e0acbf8ec (patch) | |
| tree | a5ee112282d0521ab31642d19fe7c6baad5cc7b7 /drivers/net/netdevsim/netdev.c | |
| parent | 9cf9aa77a1f6339ac97ac4afe44939cf0974ef96 (diff) | |
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>
Diffstat (limited to 'drivers/net/netdevsim/netdev.c')
| -rw-r--r-- | drivers/net/netdevsim/netdev.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c index 2b713db16cd0..6927c1962277 100644 --- a/drivers/net/netdevsim/netdev.c +++ b/drivers/net/netdevsim/netdev.c @@ -133,15 +133,21 @@ static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev) if (!nsim_ipsec_tx(ns, skb)) goto out_drop_any; - peer_ns = rcu_dereference(ns->peer); - if (!peer_ns) - goto out_drop_any; + /* Check if loopback mode is enabled */ + if (dev->features & NETIF_F_LOOPBACK) { + peer_ns = ns; + peer_dev = dev; + } else { + peer_ns = rcu_dereference(ns->peer); + if (!peer_ns) + goto out_drop_any; + peer_dev = peer_ns->netdev; + } dr = nsim_do_psp(skb, ns, peer_ns, &psp_ext); if (dr) goto out_drop_free; - peer_dev = peer_ns->netdev; rxq = skb_get_queue_mapping(skb); if (rxq >= peer_dev->num_rx_queues) rxq = rxq % peer_dev->num_rx_queues; @@ -976,7 +982,8 @@ static void nsim_setup(struct net_device *dev) NETIF_F_FRAGLIST | NETIF_F_HW_CSUM | NETIF_F_LRO | - NETIF_F_TSO; + NETIF_F_TSO | + NETIF_F_LOOPBACK; dev->pcpu_stat_type = NETDEV_PCPU_STAT_DSTATS; dev->max_mtu = ETH_MAX_MTU; dev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_HW_OFFLOAD; |