lkml.org 
[lkml]   [2020]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.5 138/170] netfilter: nft_fwd_netdev: allow to redirect to ifb via ingress
Date
From: Pablo Neira Ayuso <pablo@netfilter.org>

commit bcfabee1afd99484b6ba067361b8678e28bbc065 upstream.

Set skb->tc_redirected to 1, otherwise the ifb driver drops the packet.
Set skb->tc_from_ingress to 1 to reinject the packet back to the ingress
path after leaving the ifb egress path.

This patch inconditionally sets on these two skb fields that are
meaningful to the ifb driver. The existing forward action is guaranteed
to run from ingress path.

Fixes: 39e6dea28adc ("netfilter: nf_tables: add forward expression to the netdev family")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/netfilter/nft_fwd_netdev.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/net/netfilter/nft_fwd_netdev.c
+++ b/net/netfilter/nft_fwd_netdev.c
@@ -28,6 +28,10 @@ static void nft_fwd_netdev_eval(const st
struct nft_fwd_netdev *priv = nft_expr_priv(expr);
int oif = regs->data[priv->sreg_dev];

+ /* These are used by ifb only. */
+ pkt->skb->tc_redirected = 1;
+ pkt->skb->tc_from_ingress = 1;
+
nf_fwd_netdev_egress(pkt, oif);
regs->verdict.code = NF_STOLEN;
}

\
 
 \ /
  Last update: 2020-03-31 11:09    [W:0.441 / U:0.928 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site