src: support for offload chain flag

This patch extends the basechain definition to allow users to specify
the offload flag. This flag enables hardware offload if your drivers
supports it.

 # cat file.nft
 table netdev x {
    chain y {
       type filter hook ingress device eth0 priority 10; flags offload;
    }
 }
 # nft -f file.nft

Note: You have to enable offload via ethtool:

 # ethtool -K eth0 hw-tc-offload on

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/rule.h b/include/rule.h
index ced63f3e..224e6871 100644
--- a/include/rule.h
+++ b/include/rule.h
@@ -175,6 +175,7 @@ extern struct table *table_lookup_fuzzy(const struct handle *h,
  */
 enum chain_flags {
 	CHAIN_F_BASECHAIN	= 0x1,
+	CHAIN_F_HW_OFFLOAD	= 0x2,
 };
 
 /**