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netfilter: nf_tables: add hardware offload support

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This patch adds hardware offload support for nftables through the
existing netdev_ops->ndo_setup_tc() interface, the TC_SETUP_CLSFLOWER
classifier and the flow rule API. This hardware offload support is
available for the NFPROTO_NETDEV family and the ingress hook.

Each nftables expression has a new ->offload interface, that is used to
populate the flow rule object that is attached to the transaction
object.

There is a new per-table NFT_TABLE_F_HW flag, that is set on to offload
an entire table, including all of its chains.

This patch supports for basic metadata (layer 3 and 4 protocol numbers),
5-tuple payload matching and the accept/drop actions; this also includes
basechain hardware offload only.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso
2019-07-09 23:00:43 +02:00
committed by David S. Miller
parent f9e30088d2
commit c9626a2cbd
10 changed files with 691 additions and 7 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
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@@ -192,6 +192,7 @@ enum nft_table_attributes {
* @NFTA_CHAIN_USE: number of references to this chain (NLA_U32)
* @NFTA_CHAIN_TYPE: type name of the string (NLA_NUL_STRING)
* @NFTA_CHAIN_COUNTERS: counter specification of the chain (NLA_NESTED: nft_counter_attributes)
* @NFTA_CHAIN_FLAGS: chain flags
*/
enum nft_chain_attributes {
NFTA_CHAIN_UNSPEC,
@@ -204,6 +205,7 @@ enum nft_chain_attributes {
NFTA_CHAIN_TYPE,
NFTA_CHAIN_COUNTERS,
NFTA_CHAIN_PAD,
NFTA_CHAIN_FLAGS,
__NFTA_CHAIN_MAX
};
#define NFTA_CHAIN_MAX (__NFTA_CHAIN_MAX - 1)