Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains Netfilter updates for your net-next tree:

1) Use lockdep_is_held() in ipset_dereference_protected(), from Lance Roy.

2) Remove unused variable in cttimeout, from YueHaibing.

3) Add ttl option for nft_osf, from Fernando Fernandez Mancera.

4) Use xfrm family to deal with IPv6-in-IPv4 packets from nft_xfrm,
   from Florian Westphal.

5) Simplify xt_osf_match_packet().

6) Missing ct helper alias definition in snmp_trap helper, from Taehee Yoo.

7) Remove unnecessary parameter in nf_flow_table_cleanup(), from Taehee Yoo.

8) Remove unused variable definitions in nft_{dup,fwd}, from Weongyo Jeong.

9) Remove empty net/netfilter/nfnetlink_log.h file, from Taehee Yoo.

10) Revert xt_quota updates remain option due to problems in the listing
    path for 32-bit arches, from Maze.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netfilter/nfnetlink_osf.h

@@ -27,6 +27,7 @@ bool nf_osf_match(const struct sk_buff *skb, u_int8_t family,
 		  const struct list_head *nf_osf_fingers);
 
 const char *nf_osf_find(const struct sk_buff *skb,
-                        const struct list_head *nf_osf_fingers);
+			const struct list_head *nf_osf_fingers,
+			const int ttl_check);
 
 #endif /* _NFOSF_H */

include/net/netfilter/nf_flow_table.h

@@ -99,7 +99,7 @@ int nf_flow_table_iterate(struct nf_flowtable *flow_table,
 			  void (*iter)(struct flow_offload *flow, void *data),
 			  void *data);
 
-void nf_flow_table_cleanup(struct net *net, struct net_device *dev);
+void nf_flow_table_cleanup(struct net_device *dev);
 
 int nf_flow_table_init(struct nf_flowtable *flow_table);
 void nf_flow_table_free(struct nf_flowtable *flow_table);

include/net/netfilter/nfnetlink_log.h

@@ -1 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */

include/uapi/linux/netfilter/nf_tables.h

@@ -1511,9 +1511,16 @@ enum nft_flowtable_hook_attributes {
 };
 #define NFTA_FLOWTABLE_HOOK_MAX	(__NFTA_FLOWTABLE_HOOK_MAX - 1)
 
+/**
+ * enum nft_osf_attributes - nftables osf expression netlink attributes
+ *
+ * @NFTA_OSF_DREG: destination register (NLA_U32: nft_registers)
+ * @NFTA_OSF_TTL: Value of the TTL osf option (NLA_U8)
+ */
 enum nft_osf_attributes {
 	NFTA_OSF_UNSPEC,
 	NFTA_OSF_DREG,
+	NFTA_OSF_TTL,
 	__NFTA_OSF_MAX,
 };
 #define NFTA_OSF_MAX (__NFTA_OSF_MAX - 1)

include/uapi/linux/netfilter/xt_quota.h

@@ -15,11 +15,9 @@ struct xt_quota_info {
 	__u32 flags;
 	__u32 pad;
 	__aligned_u64 quota;
-#ifdef __KERNEL__
-	atomic64_t counter;
-#else
-	__aligned_u64 remain;
-#endif
+
+	/* Used internally by the kernel */
+	struct xt_quota_priv	*master;
 };
 
 #endif /* _XT_QUOTA_H */

net/ipv4/netfilter/nf_nat_snmp_basic_main.c

@@ -60,6 +60,7 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("James Morris <jmorris@intercode.com.au>");
 MODULE_DESCRIPTION("Basic SNMP Application Layer Gateway");
 MODULE_ALIAS("ip_nat_snmp_basic");
+MODULE_ALIAS_NFCT_HELPER("snmp_trap");
 
 #define SNMP_PORT 161
 #define SNMP_TRAP_PORT 162

net/netfilter/ipset/ip_set_hash_gen.h

@@ -15,7 +15,7 @@
 
 #define __ipset_dereference_protected(p, c)	rcu_dereference_protected(p, c)
 #define ipset_dereference_protected(p, set) \
-	__ipset_dereference_protected(p, spin_is_locked(&(set)->lock))
+	__ipset_dereference_protected(p, lockdep_is_held(&(set)->lock))
 
 #define rcu_dereference_bh_nfnl(p)	rcu_dereference_bh_check(p, 1)
 

net/netfilter/nf_flow_table_core.c

@@ -483,7 +483,7 @@ static void nf_flow_table_iterate_cleanup(struct nf_flowtable *flowtable,
 	flush_delayed_work(&flowtable->gc_work);
 }
 
-void nf_flow_table_cleanup(struct net *net, struct net_device *dev)
+void nf_flow_table_cleanup(struct net_device *dev)
 {
 	struct nf_flowtable *flowtable;
 

net/netfilter/nfnetlink_cttimeout.c

@@ -350,7 +350,6 @@ static int cttimeout_default_set(struct net *net, struct sock *ctnl,
 				 struct netlink_ext_ack *extack)
 {
 	const struct nf_conntrack_l4proto *l4proto;
-	__u16 l3num;
 	__u8 l4num;
 	int ret;
 
@@ -359,7 +358,6 @@ static int cttimeout_default_set(struct net *net, struct sock *ctnl,
 	    !cda[CTA_TIMEOUT_DATA])
 		return -EINVAL;
 
-	l3num = ntohs(nla_get_be16(cda[CTA_TIMEOUT_L3PROTO]));
 	l4num = nla_get_u8(cda[CTA_TIMEOUT_L4PROTO]);
 	l4proto = nf_ct_l4proto_find_get(l4num);
 

net/netfilter/nfnetlink_osf.c

@@ -30,32 +30,27 @@ EXPORT_SYMBOL_GPL(nf_osf_fingers);
 static inline int nf_osf_ttl(const struct sk_buff *skb,
 			     int ttl_check, unsigned char f_ttl)
 {
+	struct in_device *in_dev = __in_dev_get_rcu(skb->dev);
 	const struct iphdr *ip = ip_hdr(skb);
+	int ret = 0;
 
-	if (ttl_check != -1) {
-		if (ttl_check == NF_OSF_TTL_TRUE)
-			return ip->ttl == f_ttl;
-		if (ttl_check == NF_OSF_TTL_NOCHECK)
-			return 1;
-		else if (ip->ttl <= f_ttl)
-			return 1;
-		else {
-			struct in_device *in_dev = __in_dev_get_rcu(skb->dev);
-			int ret = 0;
+	if (ttl_check == NF_OSF_TTL_TRUE)
+		return ip->ttl == f_ttl;
+	if (ttl_check == NF_OSF_TTL_NOCHECK)
+		return 1;
+	else if (ip->ttl <= f_ttl)
+		return 1;
 
-			for_ifa(in_dev) {
-				if (inet_ifa_match(ip->saddr, ifa)) {
-					ret = (ip->ttl == f_ttl);
-					break;
-				}
-			}
-			endfor_ifa(in_dev);
-
-			return ret;
+	for_ifa(in_dev) {
+		if (inet_ifa_match(ip->saddr, ifa)) {
+			ret = (ip->ttl == f_ttl);
+			break;
 		}
 	}
 
-	return ip->ttl == f_ttl;
+	endfor_ifa(in_dev);
+
+	return ret;
 }
 
 struct nf_osf_hdr_ctx {
@@ -213,7 +208,7 @@ nf_osf_match(const struct sk_buff *skb, u_int8_t family,
 	if (!tcp)
 		return false;
 
-	ttl_check = (info->flags & NF_OSF_TTL) ? info->ttl : -1;
+	ttl_check = (info->flags & NF_OSF_TTL) ? info->ttl : 0;
 
 	list_for_each_entry_rcu(kf, &nf_osf_fingers[ctx.df], finger_entry) {
 
@@ -257,7 +252,8 @@ nf_osf_match(const struct sk_buff *skb, u_int8_t family,
 EXPORT_SYMBOL_GPL(nf_osf_match);
 
 const char *nf_osf_find(const struct sk_buff *skb,
-			const struct list_head *nf_osf_fingers)
+			const struct list_head *nf_osf_fingers,
+			const int ttl_check)
 {
 	const struct iphdr *ip = ip_hdr(skb);
 	const struct nf_osf_user_finger *f;
@@ -275,7 +271,7 @@ const char *nf_osf_find(const struct sk_buff *skb,
 
 	list_for_each_entry_rcu(kf, &nf_osf_fingers[ctx.df], finger_entry) {
 		f = &kf->finger;
-		if (!nf_osf_match_one(skb, f, -1, &ctx))
+		if (!nf_osf_match_one(skb, f, ttl_check, &ctx))
 			continue;
 
 		genre = f->genre;

net/netfilter/nft_dup_netdev.c

@@ -46,8 +46,6 @@ static int nft_dup_netdev_init(const struct nft_ctx *ctx,
 	return nft_validate_register_load(priv->sreg_dev, sizeof(int));
 }
 
-static const struct nft_expr_ops nft_dup_netdev_ingress_ops;
-
 static int nft_dup_netdev_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	struct nft_dup_netdev *priv = nft_expr_priv(expr);

net/netfilter/nft_flow_offload.c

@@ -201,7 +201,7 @@ static int flow_offload_netdev_event(struct notifier_block *this,
 	if (event != NETDEV_DOWN)
 		return NOTIFY_DONE;
 
-	nf_flow_table_cleanup(dev_net(dev), dev);
+	nf_flow_table_cleanup(dev);
 
 	return NOTIFY_DONE;
 }

net/netfilter/nft_fwd_netdev.c

@@ -53,8 +53,6 @@ static int nft_fwd_netdev_init(const struct nft_ctx *ctx,
 	return nft_validate_register_load(priv->sreg_dev, sizeof(int));
 }
 
-static const struct nft_expr_ops nft_fwd_netdev_ingress_ops;
-
 static int nft_fwd_netdev_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	struct nft_fwd_netdev *priv = nft_expr_priv(expr);
@@ -169,8 +167,6 @@ static int nft_fwd_neigh_init(const struct nft_ctx *ctx,
 	return nft_validate_register_load(priv->sreg_addr, addr_len);
 }
 
-static const struct nft_expr_ops nft_fwd_netdev_ingress_ops;
-
 static int nft_fwd_neigh_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	struct nft_fwd_neigh *priv = nft_expr_priv(expr);

net/netfilter/nft_osf.c

@@ -6,10 +6,12 @@
 
 struct nft_osf {
 	enum nft_registers	dreg:8;
+	u8			ttl;
 };
 
 static const struct nla_policy nft_osf_policy[NFTA_OSF_MAX + 1] = {
 	[NFTA_OSF_DREG]		= { .type = NLA_U32 },
+	[NFTA_OSF_TTL]		= { .type = NLA_U8 },
 };
 
 static void nft_osf_eval(const struct nft_expr *expr, struct nft_regs *regs,
@@ -33,7 +35,7 @@ static void nft_osf_eval(const struct nft_expr *expr, struct nft_regs *regs,
 		return;
 	}
 
-	os_name = nf_osf_find(skb, nf_osf_fingers);
+	os_name = nf_osf_find(skb, nf_osf_fingers, priv->ttl);
 	if (!os_name)
 		strncpy((char *)dest, "unknown", NFT_OSF_MAXGENRELEN);
 	else
@@ -46,6 +48,14 @@ static int nft_osf_init(const struct nft_ctx *ctx,
 {
 	struct nft_osf *priv = nft_expr_priv(expr);
 	int err;
+	u8 ttl;
+
+	if (nla_get_u8(tb[NFTA_OSF_TTL])) {
+		ttl = nla_get_u8(tb[NFTA_OSF_TTL]);
+		if (ttl > 2)
+			return -EINVAL;
+		priv->ttl = ttl;
+	}
 
 	priv->dreg = nft_parse_register(tb[NFTA_OSF_DREG]);
 	err = nft_validate_register_store(ctx, priv->dreg, NULL,
@@ -60,6 +70,9 @@ static int nft_osf_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	const struct nft_osf *priv = nft_expr_priv(expr);
 
+	if (nla_put_u8(skb, NFTA_OSF_TTL, priv->ttl))
+		goto nla_put_failure;
+
 	if (nft_dump_register(skb, NFTA_OSF_DREG, priv->dreg))
 		goto nla_put_failure;
 

net/netfilter/nft_xfrm.c

@@ -118,12 +118,13 @@ static bool xfrm_state_addr_ok(enum nft_xfrm_keys k, u8 family, u8 mode)
 
 static void nft_xfrm_state_get_key(const struct nft_xfrm *priv,
 				   struct nft_regs *regs,
-				   const struct xfrm_state *state,
-				   u8 family)
+				   const struct xfrm_state *state)
 {
 	u32 *dest = &regs->data[priv->dreg];
 
-	if (!xfrm_state_addr_ok(priv->key, family, state->props.mode)) {
+	if (!xfrm_state_addr_ok(priv->key,
+				state->props.family,
+				state->props.mode)) {
 		regs->verdict.code = NFT_BREAK;
 		return;
 	}
@@ -169,7 +170,7 @@ static void nft_xfrm_get_eval_in(const struct nft_xfrm *priv,
 	}
 
 	state = sp->xvec[priv->spnum];
-	nft_xfrm_state_get_key(priv, regs, state, nft_pf(pkt));
+	nft_xfrm_state_get_key(priv, regs, state);
 }
 
 static void nft_xfrm_get_eval_out(const struct nft_xfrm *priv,
@@ -184,7 +185,7 @@ static void nft_xfrm_get_eval_out(const struct nft_xfrm *priv,
 		if (i < priv->spnum)
 			continue;
 
-		nft_xfrm_state_get_key(priv, regs, dst->xfrm, nft_pf(pkt));
+		nft_xfrm_state_get_key(priv, regs, dst->xfrm);
 		return;
 	}
 

net/netfilter/xt_osf.c

@@ -40,14 +40,8 @@
 static bool
 xt_osf_match_packet(const struct sk_buff *skb, struct xt_action_param *p)
 {
-	const struct xt_osf_info *info = p->matchinfo;
-	struct net *net = xt_net(p);
-
-	if (!info)
-		return false;
-
 	return nf_osf_match(skb, xt_family(p), xt_hooknum(p), xt_in(p),
-			    xt_out(p), info, net, nf_osf_fingers);
+			    xt_out(p), p->matchinfo, xt_net(p), nf_osf_fingers);
 }
 
 static struct xt_match xt_osf_match = {

net/netfilter/xt_quota.c

@@ -11,6 +11,11 @@
 #include <linux/netfilter/xt_quota.h>
 #include <linux/module.h>
 
+struct xt_quota_priv {
+	spinlock_t	lock;
+	uint64_t	quota;
+};
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Sam Johnston <samj@samj.net>");
 MODULE_DESCRIPTION("Xtables: countdown quota match");
@@ -21,48 +26,54 @@ static bool
 quota_mt(const struct sk_buff *skb, struct xt_action_param *par)
 {
 	struct xt_quota_info *q = (void *)par->matchinfo;
-	u64 current_count = atomic64_read(&q->counter);
+	struct xt_quota_priv *priv = q->master;
 	bool ret = q->flags & XT_QUOTA_INVERT;
-	u64 old_count, new_count;
 
-	do {
-		if (current_count == 1)
-			return ret;
-		if (current_count <= skb->len) {
-			atomic64_set(&q->counter, 1);
-			return ret;
-		}
-		old_count = current_count;
-		new_count = current_count - skb->len;
-		current_count = atomic64_cmpxchg(&q->counter, old_count,
-						 new_count);
-	} while (current_count != old_count);
-	return !ret;
+	spin_lock_bh(&priv->lock);
+	if (priv->quota >= skb->len) {
+		priv->quota -= skb->len;
+		ret = !ret;
+	} else {
+		/* we do not allow even small packets from now on */
+		priv->quota = 0;
+	}
+	spin_unlock_bh(&priv->lock);
+
+	return ret;
 }
 
 static int quota_mt_check(const struct xt_mtchk_param *par)
 {
 	struct xt_quota_info *q = par->matchinfo;
 
-	BUILD_BUG_ON(sizeof(atomic64_t) != sizeof(__u64));
-
 	if (q->flags & ~XT_QUOTA_MASK)
 		return -EINVAL;
-	if (atomic64_read(&q->counter) > q->quota + 1)
-		return -ERANGE;
 
-	if (atomic64_read(&q->counter) == 0)
-		atomic64_set(&q->counter, q->quota + 1);
+	q->master = kmalloc(sizeof(*q->master), GFP_KERNEL);
+	if (q->master == NULL)
+		return -ENOMEM;
+
+	spin_lock_init(&q->master->lock);
+	q->master->quota = q->quota;
 	return 0;
 }
 
+static void quota_mt_destroy(const struct xt_mtdtor_param *par)
+{
+	const struct xt_quota_info *q = par->matchinfo;
+
+	kfree(q->master);
+}
+
 static struct xt_match quota_mt_reg __read_mostly = {
 	.name       = "quota",
 	.revision   = 0,
 	.family     = NFPROTO_UNSPEC,
 	.match      = quota_mt,
 	.checkentry = quota_mt_check,
+	.destroy    = quota_mt_destroy,
 	.matchsize  = sizeof(struct xt_quota_info),
+	.usersize   = offsetof(struct xt_quota_info, master),
 	.me         = THIS_MODULE,
 };