diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-06-06 18:31:29 +0300 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-06-06 20:19:15 +0300 |
| commit | 3a41c64d9c1185a2f3a184015e2a9b78bfc99c71 (patch) | |
| tree | d7359ab63c6ffb3ae05ea7552f688bf642fbd5d2 /net/netfilter/nf_tables_offload.c | |
| parent | 9dd732e0bdf538b1b76dc7c157e2b5e560ff30d3 (diff) | |
| download | linux-3a41c64d9c1185a2f3a184015e2a9b78bfc99c71.tar.xz | |
netfilter: nf_tables: bail out early if hardware offload is not supported
If user requests for NFT_CHAIN_HW_OFFLOAD, then check if either device
provides the .ndo_setup_tc interface or there is an indirect flow block
that has been registered. Otherwise, bail out early from the preparation
phase. Moreover, validate that family == NFPROTO_NETDEV and hook is
NF_NETDEV_INGRESS.
Fixes: c9626a2cbdb2 ("netfilter: nf_tables: add hardware offload support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_tables_offload.c')
| -rw-r--r-- | net/netfilter/nf_tables_offload.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c index 2d36952b1392..910ef881c3b8 100644 --- a/net/netfilter/nf_tables_offload.c +++ b/net/netfilter/nf_tables_offload.c @@ -208,7 +208,7 @@ static int nft_setup_cb_call(enum tc_setup_type type, void *type_data, return 0; } -int nft_chain_offload_priority(struct nft_base_chain *basechain) +static int nft_chain_offload_priority(const struct nft_base_chain *basechain) { if (basechain->ops.priority <= 0 || basechain->ops.priority > USHRT_MAX) @@ -217,6 +217,27 @@ int nft_chain_offload_priority(struct nft_base_chain *basechain) return 0; } +bool nft_chain_offload_support(const struct nft_base_chain *basechain) +{ + struct net_device *dev; + struct nft_hook *hook; + + if (nft_chain_offload_priority(basechain) < 0) + return false; + + list_for_each_entry(hook, &basechain->hook_list, list) { + if (hook->ops.pf != NFPROTO_NETDEV || + hook->ops.hooknum != NF_NETDEV_INGRESS) + return false; + + dev = hook->ops.dev; + if (!dev->netdev_ops->ndo_setup_tc && !flow_indr_dev_exists()) + return false; + } + + return true; +} + static void nft_flow_cls_offload_setup(struct flow_cls_offload *cls_flow, const struct nft_base_chain *basechain, const struct nft_rule *rule, |