From: Pablo Neira Ayuso Date: Wed, 7 Oct 2020 23:14:45 +0000 (+0200) Subject: netfilter: add nf_static_key_{inc,dec} X-Git-Tag: v5.15~2655^2~17^2~4 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=afd9024cd1fcfb23fe804d473f457fde07a71148;p=mirror_ubuntu-kernels.git netfilter: add nf_static_key_{inc,dec} Add helper functions increment and decrement the hook static keys. Signed-off-by: Pablo Neira Ayuso --- diff --git a/net/netfilter/core.c b/net/netfilter/core.c index 3ac7c8c1548d..b9ec8ecf7e30 100644 --- a/net/netfilter/core.c +++ b/net/netfilter/core.c @@ -311,6 +311,20 @@ nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum, return NULL; } +static void nf_static_key_inc(const struct nf_hook_ops *reg, int pf) +{ +#ifdef CONFIG_JUMP_LABEL + static_key_slow_inc(&nf_hooks_needed[pf][reg->hooknum]); +#endif +} + +static void nf_static_key_dec(const struct nf_hook_ops *reg, int pf) +{ +#ifdef CONFIG_JUMP_LABEL + static_key_slow_dec(&nf_hooks_needed[pf][reg->hooknum]); +#endif +} + static int __nf_register_net_hook(struct net *net, int pf, const struct nf_hook_ops *reg) { @@ -348,9 +362,8 @@ static int __nf_register_net_hook(struct net *net, int pf, if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS) net_inc_ingress_queue(); #endif -#ifdef CONFIG_JUMP_LABEL - static_key_slow_inc(&nf_hooks_needed[pf][reg->hooknum]); -#endif + nf_static_key_inc(reg, pf); + BUG_ON(p == new_hooks); nf_hook_entries_free(p); return 0; @@ -406,9 +419,7 @@ static void __nf_unregister_net_hook(struct net *net, int pf, if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS) net_dec_ingress_queue(); #endif -#ifdef CONFIG_JUMP_LABEL - static_key_slow_dec(&nf_hooks_needed[pf][reg->hooknum]); -#endif + nf_static_key_dec(reg, pf); } else { WARN_ONCE(1, "hook not found, pf %d num %d", pf, reg->hooknum); }