#include <linux/smp.h>
#include <linux/static_key.h>
#include <net/dst.h>
+#include <net/ip.h>
#include <net/sock.h>
#include <net/tcp_states.h> /* for TCP_TIME_WAIT */
#include <net/netfilter/nf_tables.h>
static DEFINE_PER_CPU(struct rnd_state, nft_prandom_state);
-static u8 nft_meta_weekday(time64_t secs)
+static u8 nft_meta_weekday(void)
{
+ time64_t secs = ktime_get_real_seconds();
unsigned int dse;
u8 wday;
+ tm.tm_sec;
}
+static noinline_for_stack void
+nft_meta_get_eval_time(enum nft_meta_keys key,
+ u32 *dest)
+{
+ switch (key) {
+ case NFT_META_TIME_NS:
+ nft_reg_store64(dest, ktime_get_real_ns());
+ break;
+ case NFT_META_TIME_DAY:
+ nft_reg_store8(dest, nft_meta_weekday());
+ break;
+ case NFT_META_TIME_HOUR:
+ *dest = nft_meta_hour(ktime_get_real_seconds());
+ break;
+ default:
+ break;
+ }
+}
+
+static noinline bool
+nft_meta_get_eval_pkttype_lo(const struct nft_pktinfo *pkt,
+ u32 *dest)
+{
+ const struct sk_buff *skb = pkt->skb;
+
+ switch (nft_pf(pkt)) {
+ case NFPROTO_IPV4:
+ if (ipv4_is_multicast(ip_hdr(skb)->daddr))
+ nft_reg_store8(dest, PACKET_MULTICAST);
+ else
+ nft_reg_store8(dest, PACKET_BROADCAST);
+ break;
+ case NFPROTO_IPV6:
+ nft_reg_store8(dest, PACKET_MULTICAST);
+ break;
+ case NFPROTO_NETDEV:
+ switch (skb->protocol) {
+ case htons(ETH_P_IP): {
+ int noff = skb_network_offset(skb);
+ struct iphdr *iph, _iph;
+
+ iph = skb_header_pointer(skb, noff,
+ sizeof(_iph), &_iph);
+ if (!iph)
+ return false;
+
+ if (ipv4_is_multicast(iph->daddr))
+ nft_reg_store8(dest, PACKET_MULTICAST);
+ else
+ nft_reg_store8(dest, PACKET_BROADCAST);
+
+ break;
+ }
+ case htons(ETH_P_IPV6):
+ nft_reg_store8(dest, PACKET_MULTICAST);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return false;
+ }
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return false;
+ }
+
+ return true;
+}
+
+static noinline bool
+nft_meta_get_eval_skugid(enum nft_meta_keys key,
+ u32 *dest,
+ const struct nft_pktinfo *pkt)
+{
+ struct sock *sk = skb_to_full_sk(pkt->skb);
+ struct socket *sock;
+
+ if (!sk || !sk_fullsock(sk) || !net_eq(nft_net(pkt), sock_net(sk)))
+ return false;
+
+ read_lock_bh(&sk->sk_callback_lock);
+ sock = sk->sk_socket;
+ if (!sock || !sock->file) {
+ read_unlock_bh(&sk->sk_callback_lock);
+ return false;
+ }
+
+ switch (key) {
+ case NFT_META_SKUID:
+ *dest = from_kuid_munged(&init_user_ns,
+ sock->file->f_cred->fsuid);
+ break;
+ case NFT_META_SKGID:
+ *dest = from_kgid_munged(&init_user_ns,
+ sock->file->f_cred->fsgid);
+ break;
+ default:
+ break;
+ }
+
+ read_unlock_bh(&sk->sk_callback_lock);
+ return true;
+}
+
+#ifdef CONFIG_CGROUP_NET_CLASSID
+static noinline bool
+nft_meta_get_eval_cgroup(u32 *dest, const struct nft_pktinfo *pkt)
+{
+ struct sock *sk = skb_to_full_sk(pkt->skb);
+
+ if (!sk || !sk_fullsock(sk) || !net_eq(nft_net(pkt), sock_net(sk)))
+ return false;
+
+ *dest = sock_cgroup_classid(&sk->sk_cgrp_data);
+ return true;
+}
+#endif
+
+static noinline bool nft_meta_get_eval_kind(enum nft_meta_keys key,
+ u32 *dest,
+ const struct nft_pktinfo *pkt)
+{
+ const struct net_device *in = nft_in(pkt), *out = nft_out(pkt);
+
+ switch (key) {
+ case NFT_META_IIFKIND:
+ if (!in || !in->rtnl_link_ops)
+ return false;
+ strncpy((char *)dest, in->rtnl_link_ops->kind, IFNAMSIZ);
+ break;
+ case NFT_META_OIFKIND:
+ if (!out || !out->rtnl_link_ops)
+ return false;
+ strncpy((char *)dest, out->rtnl_link_ops->kind, IFNAMSIZ);
+ break;
+ default:
+ return false;
+ }
+
+ return true;
+}
+
+static void nft_meta_store_ifindex(u32 *dest, const struct net_device *dev)
+{
+ *dest = dev ? dev->ifindex : 0;
+}
+
+static void nft_meta_store_ifname(u32 *dest, const struct net_device *dev)
+{
+ strncpy((char *)dest, dev ? dev->name : "", IFNAMSIZ);
+}
+
+static bool nft_meta_store_iftype(u32 *dest, const struct net_device *dev)
+{
+ if (!dev)
+ return false;
+
+ nft_reg_store16(dest, dev->type);
+ return true;
+}
+
+static bool nft_meta_store_ifgroup(u32 *dest, const struct net_device *dev)
+{
+ if (!dev)
+ return false;
+
+ *dest = dev->group;
+ return true;
+}
+
+static bool nft_meta_get_eval_ifname(enum nft_meta_keys key, u32 *dest,
+ const struct nft_pktinfo *pkt)
+{
+ switch (key) {
+ case NFT_META_IIFNAME:
+ nft_meta_store_ifname(dest, nft_in(pkt));
+ break;
+ case NFT_META_OIFNAME:
+ nft_meta_store_ifname(dest, nft_out(pkt));
+ break;
+ case NFT_META_IIF:
+ nft_meta_store_ifindex(dest, nft_in(pkt));
+ break;
+ case NFT_META_OIF:
+ nft_meta_store_ifindex(dest, nft_out(pkt));
+ break;
+ case NFT_META_IIFTYPE:
+ if (!nft_meta_store_iftype(dest, nft_in(pkt)))
+ return false;
+ break;
+ case NFT_META_OIFTYPE:
+ if (!nft_meta_store_iftype(dest, nft_out(pkt)))
+ return false;
+ break;
+ case NFT_META_IIFGROUP:
+ if (!nft_meta_store_ifgroup(dest, nft_out(pkt)))
+ return false;
+ break;
+ case NFT_META_OIFGROUP:
+ if (!nft_meta_store_ifgroup(dest, nft_out(pkt)))
+ return false;
+ break;
+ default:
+ return false;
+ }
+
+ return true;
+}
+
+static noinline u32 nft_prandom_u32(void)
+{
+ struct rnd_state *state = this_cpu_ptr(&nft_prandom_state);
+
+ return prandom_u32_state(state);
+}
+
+#ifdef CONFIG_IP_ROUTE_CLASSID
+static noinline bool
+nft_meta_get_eval_rtclassid(const struct sk_buff *skb, u32 *dest)
+{
+ const struct dst_entry *dst = skb_dst(skb);
+
+ if (!dst)
+ return false;
+
+ *dest = dst->tclassid;
+ return true;
+}
+#endif
+
+static noinline u32 nft_meta_get_eval_sdif(const struct nft_pktinfo *pkt)
+{
+ switch (nft_pf(pkt)) {
+ case NFPROTO_IPV4:
+ return inet_sdif(pkt->skb);
+ case NFPROTO_IPV6:
+ return inet6_sdif(pkt->skb);
+ }
+
+ return 0;
+}
+
+static noinline void
+nft_meta_get_eval_sdifname(u32 *dest, const struct nft_pktinfo *pkt)
+{
+ u32 sdif = nft_meta_get_eval_sdif(pkt);
+ const struct net_device *dev;
+
+ dev = sdif ? dev_get_by_index_rcu(nft_net(pkt), sdif) : NULL;
+ nft_meta_store_ifname(dest, dev);
+}
+
void nft_meta_get_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_meta *priv = nft_expr_priv(expr);
const struct sk_buff *skb = pkt->skb;
- const struct net_device *in = nft_in(pkt), *out = nft_out(pkt);
- struct sock *sk;
u32 *dest = ®s->data[priv->dreg];
switch (priv->key) {
*dest = skb->mark;
break;
case NFT_META_IIF:
- *dest = in ? in->ifindex : 0;
- break;
case NFT_META_OIF:
- *dest = out ? out->ifindex : 0;
- break;
case NFT_META_IIFNAME:
- strncpy((char *)dest, in ? in->name : "", IFNAMSIZ);
- break;
case NFT_META_OIFNAME:
- strncpy((char *)dest, out ? out->name : "", IFNAMSIZ);
- break;
case NFT_META_IIFTYPE:
- if (in == NULL)
- goto err;
- nft_reg_store16(dest, in->type);
- break;
case NFT_META_OIFTYPE:
- if (out == NULL)
+ case NFT_META_IIFGROUP:
+ case NFT_META_OIFGROUP:
+ if (!nft_meta_get_eval_ifname(priv->key, dest, pkt))
goto err;
- nft_reg_store16(dest, out->type);
break;
case NFT_META_SKUID:
- sk = skb_to_full_sk(skb);
- if (!sk || !sk_fullsock(sk) ||
- !net_eq(nft_net(pkt), sock_net(sk)))
- goto err;
-
- read_lock_bh(&sk->sk_callback_lock);
- if (sk->sk_socket == NULL ||
- sk->sk_socket->file == NULL) {
- read_unlock_bh(&sk->sk_callback_lock);
- goto err;
- }
-
- *dest = from_kuid_munged(&init_user_ns,
- sk->sk_socket->file->f_cred->fsuid);
- read_unlock_bh(&sk->sk_callback_lock);
- break;
case NFT_META_SKGID:
- sk = skb_to_full_sk(skb);
- if (!sk || !sk_fullsock(sk) ||
- !net_eq(nft_net(pkt), sock_net(sk)))
+ if (!nft_meta_get_eval_skugid(priv->key, dest, pkt))
goto err;
-
- read_lock_bh(&sk->sk_callback_lock);
- if (sk->sk_socket == NULL ||
- sk->sk_socket->file == NULL) {
- read_unlock_bh(&sk->sk_callback_lock);
- goto err;
- }
- *dest = from_kgid_munged(&init_user_ns,
- sk->sk_socket->file->f_cred->fsgid);
- read_unlock_bh(&sk->sk_callback_lock);
break;
#ifdef CONFIG_IP_ROUTE_CLASSID
- case NFT_META_RTCLASSID: {
- const struct dst_entry *dst = skb_dst(skb);
-
- if (dst == NULL)
+ case NFT_META_RTCLASSID:
+ if (!nft_meta_get_eval_rtclassid(skb, dest))
goto err;
- *dest = dst->tclassid;
break;
- }
#endif
#ifdef CONFIG_NETWORK_SECMARK
case NFT_META_SECMARK:
break;
}
- switch (nft_pf(pkt)) {
- case NFPROTO_IPV4:
- if (ipv4_is_multicast(ip_hdr(skb)->daddr))
- nft_reg_store8(dest, PACKET_MULTICAST);
- else
- nft_reg_store8(dest, PACKET_BROADCAST);
- break;
- case NFPROTO_IPV6:
- nft_reg_store8(dest, PACKET_MULTICAST);
- break;
- case NFPROTO_NETDEV:
- switch (skb->protocol) {
- case htons(ETH_P_IP): {
- int noff = skb_network_offset(skb);
- struct iphdr *iph, _iph;
-
- iph = skb_header_pointer(skb, noff,
- sizeof(_iph), &_iph);
- if (!iph)
- goto err;
-
- if (ipv4_is_multicast(iph->daddr))
- nft_reg_store8(dest, PACKET_MULTICAST);
- else
- nft_reg_store8(dest, PACKET_BROADCAST);
-
- break;
- }
- case htons(ETH_P_IPV6):
- nft_reg_store8(dest, PACKET_MULTICAST);
- break;
- default:
- WARN_ON_ONCE(1);
- goto err;
- }
- break;
- default:
- WARN_ON_ONCE(1);
+ if (!nft_meta_get_eval_pkttype_lo(pkt, dest))
goto err;
- }
break;
case NFT_META_CPU:
*dest = raw_smp_processor_id();
break;
- case NFT_META_IIFGROUP:
- if (in == NULL)
- goto err;
- *dest = in->group;
- break;
- case NFT_META_OIFGROUP:
- if (out == NULL)
- goto err;
- *dest = out->group;
- break;
#ifdef CONFIG_CGROUP_NET_CLASSID
case NFT_META_CGROUP:
- sk = skb_to_full_sk(skb);
- if (!sk || !sk_fullsock(sk) ||
- !net_eq(nft_net(pkt), sock_net(sk)))
+ if (!nft_meta_get_eval_cgroup(dest, pkt))
goto err;
- *dest = sock_cgroup_classid(&sk->sk_cgrp_data);
break;
#endif
- case NFT_META_PRANDOM: {
- struct rnd_state *state = this_cpu_ptr(&nft_prandom_state);
- *dest = prandom_u32_state(state);
+ case NFT_META_PRANDOM:
+ *dest = nft_prandom_u32();
break;
- }
#ifdef CONFIG_XFRM
case NFT_META_SECPATH:
nft_reg_store8(dest, secpath_exists(skb));
break;
#endif
case NFT_META_IIFKIND:
- if (in == NULL || in->rtnl_link_ops == NULL)
- goto err;
- strncpy((char *)dest, in->rtnl_link_ops->kind, IFNAMSIZ);
- break;
case NFT_META_OIFKIND:
- if (out == NULL || out->rtnl_link_ops == NULL)
+ if (!nft_meta_get_eval_kind(priv->key, dest, pkt))
goto err;
- strncpy((char *)dest, out->rtnl_link_ops->kind, IFNAMSIZ);
break;
case NFT_META_TIME_NS:
- nft_reg_store64(dest, ktime_get_real_ns());
- break;
case NFT_META_TIME_DAY:
- nft_reg_store8(dest, nft_meta_weekday(ktime_get_real_seconds()));
- break;
case NFT_META_TIME_HOUR:
- *dest = nft_meta_hour(ktime_get_real_seconds());
+ nft_meta_get_eval_time(priv->key, dest);
+ break;
+ case NFT_META_SDIF:
+ *dest = nft_meta_get_eval_sdif(pkt);
+ break;
+ case NFT_META_SDIFNAME:
+ nft_meta_get_eval_sdifname(dest, pkt);
break;
default:
WARN_ON(1);
case NFT_META_MARK:
case NFT_META_IIF:
case NFT_META_OIF:
+ case NFT_META_SDIF:
case NFT_META_SKUID:
case NFT_META_SKGID:
#ifdef CONFIG_IP_ROUTE_CLASSID
case NFT_META_OIFNAME:
case NFT_META_IIFKIND:
case NFT_META_OIFKIND:
+ case NFT_META_SDIFNAME:
len = IFNAMSIZ;
break;
case NFT_META_PRANDOM:
}
EXPORT_SYMBOL_GPL(nft_meta_get_init);
-static int nft_meta_get_validate(const struct nft_ctx *ctx,
- const struct nft_expr *expr,
- const struct nft_data **data)
+static int nft_meta_get_validate_sdif(const struct nft_ctx *ctx)
{
-#ifdef CONFIG_XFRM
- const struct nft_meta *priv = nft_expr_priv(expr);
unsigned int hooks;
- if (priv->key != NFT_META_SECPATH)
- return 0;
+ switch (ctx->family) {
+ case NFPROTO_IPV4:
+ case NFPROTO_IPV6:
+ case NFPROTO_INET:
+ hooks = (1 << NF_INET_LOCAL_IN) |
+ (1 << NF_INET_FORWARD);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return nft_chain_validate_hooks(ctx->chain, hooks);
+}
+
+static int nft_meta_get_validate_xfrm(const struct nft_ctx *ctx)
+{
+#ifdef CONFIG_XFRM
+ unsigned int hooks;
switch (ctx->family) {
case NFPROTO_NETDEV:
#endif
}
+static int nft_meta_get_validate(const struct nft_ctx *ctx,
+ const struct nft_expr *expr,
+ const struct nft_data **data)
+{
+ const struct nft_meta *priv = nft_expr_priv(expr);
+
+ switch (priv->key) {
+ case NFT_META_SECPATH:
+ return nft_meta_get_validate_xfrm(ctx);
+ case NFT_META_SDIF:
+ case NFT_META_SDIFNAME:
+ return nft_meta_get_validate_sdif(ctx);
+ default:
+ break;
+ }
+
+ return 0;
+}
+
int nft_meta_set_validate(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nft_data **data)
projects / linux.git / blobdiff