netfilter: add nf_static_key_{inc,dec}
Add helper functions increment and decrement the hook static keys. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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073b04e76b
Коммит
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@ -311,6 +311,20 @@ nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
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return NULL;
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return NULL;
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}
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}
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static void nf_static_key_inc(const struct nf_hook_ops *reg, int pf)
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{
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#ifdef CONFIG_JUMP_LABEL
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static_key_slow_inc(&nf_hooks_needed[pf][reg->hooknum]);
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#endif
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}
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static void nf_static_key_dec(const struct nf_hook_ops *reg, int pf)
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{
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#ifdef CONFIG_JUMP_LABEL
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static_key_slow_dec(&nf_hooks_needed[pf][reg->hooknum]);
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#endif
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}
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static int __nf_register_net_hook(struct net *net, int pf,
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static int __nf_register_net_hook(struct net *net, int pf,
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const struct nf_hook_ops *reg)
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const struct nf_hook_ops *reg)
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{
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{
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@ -348,9 +362,8 @@ static int __nf_register_net_hook(struct net *net, int pf,
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if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
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if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
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net_inc_ingress_queue();
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net_inc_ingress_queue();
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#endif
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#endif
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#ifdef CONFIG_JUMP_LABEL
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nf_static_key_inc(reg, pf);
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static_key_slow_inc(&nf_hooks_needed[pf][reg->hooknum]);
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#endif
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BUG_ON(p == new_hooks);
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BUG_ON(p == new_hooks);
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nf_hook_entries_free(p);
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nf_hook_entries_free(p);
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return 0;
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return 0;
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@ -406,9 +419,7 @@ static void __nf_unregister_net_hook(struct net *net, int pf,
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if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
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if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
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net_dec_ingress_queue();
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net_dec_ingress_queue();
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#endif
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#endif
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#ifdef CONFIG_JUMP_LABEL
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nf_static_key_dec(reg, pf);
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static_key_slow_dec(&nf_hooks_needed[pf][reg->hooknum]);
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#endif
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} else {
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} else {
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WARN_ONCE(1, "hook not found, pf %d num %d", pf, reg->hooknum);
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WARN_ONCE(1, "hook not found, pf %d num %d", pf, reg->hooknum);
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}
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}
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