@@ -612,5 +612,6 @@ int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
enum tc_setup_type type, void *data,
struct flow_block_offload *bo,
void (*cleanup)(struct flow_block_cb *block_cb));
+bool flow_indr_dev_exists(void);
#endif /* _NET_FLOW_OFFLOAD_H */
@@ -92,7 +92,7 @@ int nft_flow_rule_offload_commit(struct net *net);
NFT_OFFLOAD_MATCH(__key, __base, __field, __len, __reg) \
memset(&(__reg)->mask, 0xff, (__reg)->len);
-int nft_chain_offload_priority(struct nft_base_chain *basechain);
+bool nft_chain_offload_support(const struct nft_base_chain *basechain);
int nft_offload_init(void);
void nft_offload_exit(void);
@@ -595,3 +595,9 @@ int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
return (bo && list_empty(&bo->cb_list)) ? -EOPNOTSUPP : count;
}
EXPORT_SYMBOL(flow_indr_dev_setup_offload);
+
+bool flow_indr_dev_exists(void)
+{
+ return !list_empty(&flow_block_indr_dev_list);
+}
+EXPORT_SYMBOL(flow_indr_dev_exists);
@@ -2166,7 +2166,7 @@ static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
chain->flags |= NFT_CHAIN_BASE | flags;
basechain->policy = NF_ACCEPT;
if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
- nft_chain_offload_priority(basechain) < 0)
+ !nft_chain_offload_support(basechain))
return -EOPNOTSUPP;
flow_block_init(&basechain->flow_block);
@@ -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 +217,24 @@ 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) {
+ 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,
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. Fixes: c9626a2cbdb2 ("netfilter: nf_tables: add hardware offload support") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> --- v2: move nft_chain_offload_priority() out of the loop include/net/flow_offload.h | 1 + include/net/netfilter/nf_tables_offload.h | 2 +- net/core/flow_offload.c | 6 ++++++ net/netfilter/nf_tables_api.c | 2 +- net/netfilter/nf_tables_offload.c | 20 +++++++++++++++++++- 5 files changed, 28 insertions(+), 3 deletions(-)