net: ifb: support BIG TCP packets

Set the driver limit to GSO_MAX_SIZE (512 KB).

This allows the admin/user to set a GSO limit up to this value, to
avoid segmenting too large GRO packets in the netem -> ifb path.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250701084540.459261-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index 67424888ff0aad4ca3d6980950f54f2c4b7fdf33..d3dc0914450a87a491c2f634739b324a96d0a9a0 100644 (file)
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -333,6 +333,7 @@ static void ifb_setup(struct net_device *dev)
 
        dev->min_mtu = 0;
        dev->max_mtu = 0;
+       netif_set_tso_max_size(dev, GSO_MAX_SIZE);
 }
 
 static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev)