diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-07-10 00:00:43 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-07-10 00:38:51 +0300 |
commit | c9626a2cbdb20e26587b3fad99960520a023432b (patch) | |
tree | 1bebc0df6ae6c70cd2b4cb04c435a881cd3d8441 /net/netfilter/nft_cmp.c | |
parent | f9e30088d20016a224d8110d45356da253eaa26a (diff) | |
download | linux-c9626a2cbdb20e26587b3fad99960520a023432b.tar.xz |
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_cmp.c')
-rw-r--r-- | net/netfilter/nft_cmp.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/net/netfilter/nft_cmp.c b/net/netfilter/nft_cmp.c index 411c0cf741e3..bd173b1824c6 100644 --- a/net/netfilter/nft_cmp.c +++ b/net/netfilter/nft_cmp.c @@ -12,6 +12,7 @@ #include <linux/netfilter.h> #include <linux/netfilter/nf_tables.h> #include <net/netfilter/nf_tables_core.h> +#include <net/netfilter/nf_tables_offload.h> #include <net/netfilter/nf_tables.h> struct nft_cmp_expr { @@ -107,12 +108,44 @@ nla_put_failure: return -1; } +static int __nft_cmp_offload(struct nft_offload_ctx *ctx, + struct nft_flow_rule *flow, + const struct nft_cmp_expr *priv) +{ + struct nft_offload_reg *reg = &ctx->regs[priv->sreg]; + u8 *mask = (u8 *)&flow->match.mask; + u8 *key = (u8 *)&flow->match.key; + + if (priv->op != NFT_CMP_EQ) + return -EOPNOTSUPP; + + memcpy(key + reg->offset, &priv->data, priv->len); + memcpy(mask + reg->offset, ®->mask, priv->len); + + flow->match.dissector.used_keys |= BIT(reg->key); + flow->match.dissector.offset[reg->key] = reg->base_offset; + + nft_offload_update_dependency(ctx, &priv->data, priv->len); + + return 0; +} + +static int nft_cmp_offload(struct nft_offload_ctx *ctx, + struct nft_flow_rule *flow, + const struct nft_expr *expr) +{ + const struct nft_cmp_expr *priv = nft_expr_priv(expr); + + return __nft_cmp_offload(ctx, flow, priv); +} + static const struct nft_expr_ops nft_cmp_ops = { .type = &nft_cmp_type, .size = NFT_EXPR_SIZE(sizeof(struct nft_cmp_expr)), .eval = nft_cmp_eval, .init = nft_cmp_init, .dump = nft_cmp_dump, + .offload = nft_cmp_offload, }; static int nft_cmp_fast_init(const struct nft_ctx *ctx, @@ -143,6 +176,25 @@ static int nft_cmp_fast_init(const struct nft_ctx *ctx, return 0; } +static int nft_cmp_fast_offload(struct nft_offload_ctx *ctx, + struct nft_flow_rule *flow, + const struct nft_expr *expr) +{ + const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr); + struct nft_cmp_expr cmp = { + .data = { + .data = { + [0] = priv->data, + }, + }, + .sreg = priv->sreg, + .len = priv->len / BITS_PER_BYTE, + .op = NFT_CMP_EQ, + }; + + return __nft_cmp_offload(ctx, flow, &cmp); +} + static int nft_cmp_fast_dump(struct sk_buff *skb, const struct nft_expr *expr) { const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr); @@ -169,6 +221,7 @@ const struct nft_expr_ops nft_cmp_fast_ops = { .eval = NULL, /* inlined */ .init = nft_cmp_fast_init, .dump = nft_cmp_fast_dump, + .offload = nft_cmp_fast_offload, }; static const struct nft_expr_ops * |