openwrt/upstream - upstream openwrt

	Commit message (Expand)	Author	Age	Files	Lines
*	bcm4908: prepare kernel 5.10 support	Rafał Miłecki	2021-11-03	1	-0/+34

From: Pablo Neira Ayuso <pablo@netfilter.org> Date: Sat, 9 Dec 2017 15:36:24 +0100 Subject: [PATCH] netfilter: nf_tables_inet: don't use multihook infrastructure anymore Use new native NFPROTO_INET support in netfilter core, this gets rid of ad-hoc code in the nf_tables API codebase. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> --- --- a/include/net/netfilter/nf_tables_ipv4.h +++ b/include/net/netfilter/nf_tables_ipv4.h @@ -53,6 +53,4 @@ static inline void nft_set_pktinfo_ipv4_ nft_set_pktinfo_unspec(pkt, skb); } -extern struct nft_af_info nft_af_ipv4; - #endif --- a/include/net/netfilter/nf_tables_ipv6.h +++ b/include/net/netfilter/nf_tables_ipv6.h @@ -69,6 +69,4 @@ static inline void nft_set_pktinfo_ipv6_ nft_set_pktinfo_unspec(pkt, skb); } -extern struct nft_af_info nft_af_ipv6; - #endif --- a/net/ipv4/netfilter/nf_tables_ipv4.c +++ b/net/ipv4/netfilter/nf_tables_ipv4.c @@ -45,7 +45,7 @@ static unsigned int nft_ipv4_output(void return nft_do_chain_ipv4(priv, skb, state); } -struct nft_af_info nft_af_ipv4 __read_mostly = { +static struct nft_af_info nft_af_ipv4 __read_mostly = { .family = NFPROTO_IPV4, .nhooks = NF_INET_NUMHOOKS, .owner = THIS_MODULE, @@ -58,7 +58,6 @@ struct nft_af_info nft_af_ipv4 __read_mo [NF_INET_POST_ROUTING] = nft_do_chain_ipv4, }, }; -EXPORT_SYMBOL_GPL(nft_af_ipv4); static int nf_tables_ipv4_init_net(struct net *net) { --- a/net/ipv6/netfilter/nf_tables_ipv6.c +++ b/net/ipv6/netfilter/nf_tables_ipv6.c @@ -42,7 +42,7 @@ static unsigned int nft_ipv6_output(void return nft_do_chain_ipv6(priv, skb, state); } -struct nft_af_info nft_af_ipv6 __read_mostly = { +static struct nft_af_info nft_af_ipv6 __read_mostly = { .family = NFPROTO_IPV6, .nhooks = NF_INET_NUMHOOKS, .owner = THIS_MODULE, @@ -55,7 +55,6 @@ struct nft_af_info nft_af_ipv6 __read_mo [NF_INET_POST_ROUTING] = nft_do_chain_ipv6, }, }; -EXPORT_SYMBOL_GPL(nft_af_ipv6); static int nf_tables_ipv6_init_net(struct net *net) { --- a/net/netfilter/nf_tables_inet.c +++ b/net/netfilter/nf_tables_inet.c @@ -9,6 +9,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/ip.h> +#include <linux/ipv6.h> #include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv6.h> #include <net/netfilter/nf_tables.h> @@ -16,26 +17,71 @@ #include <net/netfilter/nf_tables_ipv6.h> #include <net/ip.h> -static void nft_inet_hook_ops_init(struct nf_hook_ops *ops, unsigned int n) +static unsigned int nft_do_chain_inet(void *priv, struct sk_buff *skb, + const struct nf_hook_state *state) { - struct nft_af_info *afi; + struct nft_pktinfo pkt; - if (n == 1) - afi = &nft_af_ipv4; - else - afi = &nft_af_ipv6; - - ops->pf = afi->family; - if (afi->hooks[ops->hooknum]) - ops->hook = afi->hooks[ops->hooknum]; + nft_set_pktinfo(&pkt, skb, state); + + switch (state->pf) { + case NFPROTO_IPV4: + nft_set_pktinfo_ipv4(&pkt, skb); + break; + case NFPROTO_IPV6: + nft_set_pktinfo_ipv6(&pkt, skb); + break; + default: + break; + } + + return nft_do_chain(&pkt, priv); +} + +static unsigned int nft_inet_output(void *priv, struct sk_buff *skb, + const struct nf_hook_state *state) +{ + struct nft_pktinfo pkt; + + nft_set_pktinfo(&pkt, skb, state); + + switch (state->pf) { + case NFPROTO_IPV4: + if (unlikely(skb->len < sizeof(struct iphdr) || + ip_hdr(skb)->ihl < sizeof(struct iphdr) / 4)) { + if (net_ratelimit()) + pr_info("ignoring short SOCK_RAW packet\n"); + return NF_ACCEPT; + } + nft_set_pktinfo_ipv4(&pkt, skb); + break; + case NFPROTO_IPV6: + if (unlikely(skb->len < sizeof(struct ipv6hdr))) { + if (net_ratelimit()) + pr_info("ignoring short SOCK_RAW packet\n"); + return NF_ACCEPT; + } + nft_set_pktinfo_ipv6(&pkt, skb); + break; + default: + break; + } + + return nft_do_chain(&pkt, priv); } static struct nft_af_info nft_af_inet __read_mostly = { .family = NFPROTO_INET, .nhooks = NF_INET_NUMHOOKS, .owner = THIS_MODULE, - .nops = 2, - .hook_ops_init = nft_inet_hook_ops_init, + .nops = 1, + .hooks = { + [NF_INET_LOCAL_IN] = nft_do_chain_inet, + [NF_INET_LOCAL_OUT] = nft_inet_output, + [NF_INET_FORWARD] = nft_do_chain_inet, + [NF_INET_PRE_ROUTING] = nft_do_chain_inet, + [NF_INET_POST_ROUTING] = nft_do_chain_inet, + }, }; static int __net_init nf_tables_inet_init_net(struct net *net)