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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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107f2d5091
In order to remove rtnl lock dependency from flow_action representation translator, change rtnl_dereference() to rcu_dereference_protected() in ct action helpers that provide external access to zone and action values. This is safe to do because the functions are not called from anywhere else outside flow_action infrastructure which was modified to obtain tcf_lock when accessing action data in one of previous patches in the series. Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
65 lines
1.4 KiB
C
65 lines
1.4 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_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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u16 ct_action;
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struct rcu_head rcu;
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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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#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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#endif /* CONFIG_NF_CONNTRACK */
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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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