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author | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-07-09 23:00:43 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-07-09 14:38:51 -0700 |
commit | c9626a2cbdb20e26587b3fad99960520a023432b (patch) | |
tree | 1bebc0df6ae6c70cd2b4cb04c435a881cd3d8441 /net/netfilter/nft_immediate.c | |
parent | f9e30088d20016a224d8110d45356da253eaa26a (diff) | |
download | linux-c9626a2cbdb20e26587b3fad99960520a023432b.tar.gz linux-c9626a2cbdb20e26587b3fad99960520a023432b.tar.bz2 linux-c9626a2cbdb20e26587b3fad99960520a023432b.zip |
netfilter: nf_tables: add hardware offload support
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>
Diffstat (limited to 'net/netfilter/nft_immediate.c')
-rw-r--r-- | net/netfilter/nft_immediate.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/net/netfilter/nft_immediate.c b/net/netfilter/nft_immediate.c index cb8547f97220..ca2ae4b95a8d 100644 --- a/net/netfilter/nft_immediate.c +++ b/net/netfilter/nft_immediate.c @@ -13,6 +13,7 @@ #include <linux/netfilter/nf_tables.h> #include <net/netfilter/nf_tables_core.h> #include <net/netfilter/nf_tables.h> +#include <net/netfilter/nf_tables_offload.h> void nft_immediate_eval(const struct nft_expr *expr, struct nft_regs *regs, @@ -124,6 +125,34 @@ static int nft_immediate_validate(const struct nft_ctx *ctx, return 0; } +static int nft_immediate_offload(struct nft_offload_ctx *ctx, + struct nft_flow_rule *flow, + const struct nft_expr *expr) +{ + const struct nft_immediate_expr *priv = nft_expr_priv(expr); + struct flow_action_entry *entry; + const struct nft_data *data; + + if (priv->dreg != NFT_REG_VERDICT) + return -EOPNOTSUPP; + + entry = &flow->rule->action.entries[ctx->num_actions++]; + + data = &priv->data; + switch (data->verdict.code) { + case NF_ACCEPT: + entry->id = FLOW_ACTION_ACCEPT; + break; + case NF_DROP: + entry->id = FLOW_ACTION_DROP; + break; + default: + return -EOPNOTSUPP; + } + + return 0; +} + static const struct nft_expr_ops nft_imm_ops = { .type = &nft_imm_type, .size = NFT_EXPR_SIZE(sizeof(struct nft_immediate_expr)), @@ -133,6 +162,8 @@ static const struct nft_expr_ops nft_imm_ops = { .deactivate = nft_immediate_deactivate, .dump = nft_immediate_dump, .validate = nft_immediate_validate, + .offload = nft_immediate_offload, + .offload_flags = NFT_OFFLOAD_F_ACTION, }; struct nft_expr_type nft_imm_type __read_mostly = { |