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7cd5af0e93
There is no hardware supporting ct helper offload. However, prior to this
patch, a flower filter with a helper in the ct action can be successfully
set into the HW, for example (eth1 is a bnxt NIC):
# tc qdisc add dev eth1 ingress_block 22 ingress
# tc filter add block 22 proto ip flower skip_sw ip_proto tcp \
dst_port 21 ct_state -trk action ct helper ipv4-tcp-ftp
# tc filter show dev eth1 ingress
filter block 22 protocol ip pref 49152 flower chain 0 handle 0x1
eth_type ipv4
ip_proto tcp
dst_port 21
ct_state -trk
skip_sw
in_hw in_hw_count 1 <----
action order 1: ct zone 0 helper ipv4-tcp-ftp pipe
index 2 ref 1 bind 1
used_hw_stats delayed
This might cause the flower filter not to work as expected in the HW.
This patch avoids this problem by simply returning -EOPNOTSUPP in
tcf_ct_offload_act_setup() to not allow to offload flows with a helper
in act_ct.
Fixes: a21b06e731 ("net: sched: add helper support in act_ct")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/f8685ec7702c4a448a1371a8b34b43217b583b9d.1699898008.git.lucien.xin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NET_TC_CT_H
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#define __NET_TC_CT_H
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#include <net/act_api.h>
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#include <uapi/linux/tc_act/tc_ct.h>
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#if IS_ENABLED(CONFIG_NF_CONNTRACK)
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#include <net/netfilter/nf_nat.h>
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#include <net/netfilter/nf_conntrack_labels.h>
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struct tcf_ct_params {
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struct nf_conntrack_helper *helper;
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struct nf_conn *tmpl;
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u16 zone;
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u32 mark;
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u32 mark_mask;
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u32 labels[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
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u32 labels_mask[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
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struct nf_nat_range2 range;
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bool ipv4_range;
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bool put_labels;
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u16 ct_action;
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struct rcu_head rcu;
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struct tcf_ct_flow_table *ct_ft;
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struct nf_flowtable *nf_ft;
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};
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struct tcf_ct {
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struct tc_action common;
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struct tcf_ct_params __rcu *params;
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};
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#define to_ct(a) ((struct tcf_ct *)a)
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#define to_ct_params(a) \
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((struct tcf_ct_params *) \
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rcu_dereference_protected(to_ct(a)->params, \
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lockdep_is_held(&a->tcfa_lock)))
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static inline uint16_t tcf_ct_zone(const struct tc_action *a)
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{
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return to_ct_params(a)->zone;
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}
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static inline int tcf_ct_action(const struct tc_action *a)
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{
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return to_ct_params(a)->ct_action;
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}
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static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
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{
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return to_ct_params(a)->nf_ft;
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}
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static inline struct nf_conntrack_helper *tcf_ct_helper(const struct tc_action *a)
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{
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return to_ct_params(a)->helper;
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}
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#else
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static inline uint16_t tcf_ct_zone(const struct tc_action *a) { return 0; }
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static inline int tcf_ct_action(const struct tc_action *a) { return 0; }
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static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
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{
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return NULL;
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}
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static inline struct nf_conntrack_helper *tcf_ct_helper(const struct tc_action *a)
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{
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return NULL;
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}
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#endif /* CONFIG_NF_CONNTRACK */
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#if IS_ENABLED(CONFIG_NET_ACT_CT)
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static inline void
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tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie)
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{
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enum ip_conntrack_info ctinfo = cookie & NFCT_INFOMASK;
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struct nf_conn *ct;
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ct = (struct nf_conn *)(cookie & NFCT_PTRMASK);
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nf_conntrack_get(&ct->ct_general);
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nf_ct_set(skb, ct, ctinfo);
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}
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#else
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static inline void
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tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie) { }
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#endif
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static inline bool is_tcf_ct(const struct tc_action *a)
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{
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#if defined(CONFIG_NET_CLS_ACT) && IS_ENABLED(CONFIG_NF_CONNTRACK)
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if (a->ops && a->ops->id == TCA_ID_CT)
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return true;
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#endif
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return false;
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}
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#endif /* __NET_TC_CT_H */
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