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

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Extend nf_queue selftest to cover re-queueing, non-gso mode and
   delayed queueing, from Florian Westphal.

2) Clear skb->tstamp in IPVS forwarding path, from Julian Anastasov.

3) Provide netlink extended error reporting for EEXIST case.

4) Missing VLAN offload tag and proto in log target.
====================

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

9 files changed, 168 insertions, 34 deletions

diff --git a/include/net/netfilter/nf_log.h b/include/net/netfilter/nf_log.h
index 0d3920896d50..716db4a0fed8 100644
--- a/include/net/netfilter/nf_log.h
+++ b/include/net/netfilter/nf_log.h
@@ -108,6 +108,7 @@ int nf_log_dump_tcp_header(struct nf_log_buf *m, const struct sk_buff *skb,
 			   unsigned int logflags);
 void nf_log_dump_sk_uid_gid(struct net *net, struct nf_log_buf *m,
 			    struct sock *sk);
+void nf_log_dump_vlan(struct nf_log_buf *m, const struct sk_buff *skb);
 void nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf,
 			       unsigned int hooknum, const struct sk_buff *skb,
 			       const struct net_device *in,
diff --git a/net/ipv4/netfilter/nf_log_arp.c b/net/ipv4/netfilter/nf_log_arp.c
index 7a83f881efa9..136030ad2e54 100644
--- a/net/ipv4/netfilter/nf_log_arp.c
+++ b/net/ipv4/netfilter/nf_log_arp.c
@@ -43,16 +43,31 @@ static void dump_arp_packet(struct nf_log_buf *m,
 			    const struct nf_loginfo *info,
 			    const struct sk_buff *skb, unsigned int nhoff)
 {
-	const struct arphdr *ah;
-	struct arphdr _arph;
 	const struct arppayload *ap;
 	struct arppayload _arpp;
+	const struct arphdr *ah;
+	unsigned int logflags;
+	struct arphdr _arph;
 
 	ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
 	if (ah == NULL) {
 		nf_log_buf_add(m, "TRUNCATED");
 		return;
 	}
+
+	if (info->type == NF_LOG_TYPE_LOG)
+		logflags = info->u.log.logflags;
+	else
+		logflags = NF_LOG_DEFAULT_MASK;
+
+	if (logflags & NF_LOG_MACDECODE) {
+		nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ",
+			       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest);
+		nf_log_dump_vlan(m, skb);
+		nf_log_buf_add(m, "MACPROTO=%04x ",
+			       ntohs(eth_hdr(skb)->h_proto));
+	}
+
 	nf_log_buf_add(m, "ARP HTYPE=%d PTYPE=0x%04x OPCODE=%d",
 		       ntohs(ah->ar_hrd), ntohs(ah->ar_pro), ntohs(ah->ar_op));
 
diff --git a/net/ipv4/netfilter/nf_log_ipv4.c b/net/ipv4/netfilter/nf_log_ipv4.c
index 0c72156130b6..d07583fac8f8 100644
--- a/net/ipv4/netfilter/nf_log_ipv4.c
+++ b/net/ipv4/netfilter/nf_log_ipv4.c
@@ -284,8 +284,10 @@ static void dump_ipv4_mac_header(struct nf_log_buf *m,
 
 	switch (dev->type) {
 	case ARPHRD_ETHER:
-		nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
-			       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
+		nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ",
+			       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest);
+		nf_log_dump_vlan(m, skb);
+		nf_log_buf_add(m, "MACPROTO=%04x ",
 			       ntohs(eth_hdr(skb)->h_proto));
 		return;
 	default:
diff --git a/net/ipv6/netfilter/nf_log_ipv6.c b/net/ipv6/netfilter/nf_log_ipv6.c
index da64550a5707..8210ff34ed9b 100644
--- a/net/ipv6/netfilter/nf_log_ipv6.c
+++ b/net/ipv6/netfilter/nf_log_ipv6.c
@@ -297,9 +297,11 @@ static void dump_ipv6_mac_header(struct nf_log_buf *m,
 
 	switch (dev->type) {
 	case ARPHRD_ETHER:
-		nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
-		       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
-		       ntohs(eth_hdr(skb)->h_proto));
+		nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM ",
+			       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest);
+		nf_log_dump_vlan(m, skb);
+		nf_log_buf_add(m, "MACPROTO=%04x ",
+			       ntohs(eth_hdr(skb)->h_proto));
 		return;
 	default:
 		break;
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index b00866d777fe..d2e5a8f644b8 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -609,6 +609,8 @@ static inline int ip_vs_tunnel_xmit_prepare(struct sk_buff *skb,
 	if (ret == NF_ACCEPT) {
 		nf_reset_ct(skb);
 		skb_forward_csum(skb);
+		if (skb->dev)
+			skb->tstamp = 0;
 	}
 	return ret;
 }
@@ -649,6 +651,8 @@ static inline int ip_vs_nat_send_or_cont(int pf, struct sk_buff *skb,
 
 	if (!local) {
 		skb_forward_csum(skb);
+		if (skb->dev)
+			skb->tstamp = 0;
 		NF_HOOK(pf, NF_INET_LOCAL_OUT, cp->ipvs->net, NULL, skb,
 			NULL, skb_dst(skb)->dev, dst_output);
 	} else
@@ -669,6 +673,8 @@ static inline int ip_vs_send_or_cont(int pf, struct sk_buff *skb,
 	if (!local) {
 		ip_vs_drop_early_demux_sk(skb);
 		skb_forward_csum(skb);
+		if (skb->dev)
+			skb->tstamp = 0;
 		NF_HOOK(pf, NF_INET_LOCAL_OUT, cp->ipvs->net, NULL, skb,
 			NULL, skb_dst(skb)->dev, dst_output);
 	} else
diff --git a/net/netfilter/nf_log_common.c b/net/netfilter/nf_log_common.c
index ae5628ddbe6d..fd7c5f0f5c25 100644
--- a/net/netfilter/nf_log_common.c
+++ b/net/netfilter/nf_log_common.c
@@ -171,6 +171,18 @@ nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf,
 }
 EXPORT_SYMBOL_GPL(nf_log_dump_packet_common);
 
+void nf_log_dump_vlan(struct nf_log_buf *m, const struct sk_buff *skb)
+{
+	u16 vid;
+
+	if (!skb_vlan_tag_present(skb))
+		return;
+
+	vid = skb_vlan_tag_get(skb);
+	nf_log_buf_add(m, "VPROTO=%04x VID=%u ", ntohs(skb->vlan_proto), vid);
+}
+EXPORT_SYMBOL_GPL(nf_log_dump_vlan);
+
 /* bridge and netdev logging families share this code. */
 void nf_log_l2packet(struct net *net, u_int8_t pf,
 		     __be16 protocol,
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 4603b667973a..0e43063767d6 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2103,7 +2103,8 @@ static bool nft_hook_list_equal(struct list_head *hook_list1,
 }
 
 static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
-			      u32 flags)
+			      u32 flags, const struct nlattr *attr,
+			      struct netlink_ext_ack *extack)
 {
 	const struct nlattr * const *nla = ctx->nla;
 	struct nft_table *table = ctx->table;
@@ -2119,9 +2120,10 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
 		return -EOPNOTSUPP;
 
 	if (nla[NFTA_CHAIN_HOOK]) {
-		if (!nft_is_base_chain(chain))
+		if (!nft_is_base_chain(chain)) {
+			NL_SET_BAD_ATTR(extack, attr);
 			return -EEXIST;
-
+		}
 		err = nft_chain_parse_hook(ctx->net, nla, &hook, ctx->family,
 					   false);
 		if (err < 0)
@@ -2130,6 +2132,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
 		basechain = nft_base_chain(chain);
 		if (basechain->type != hook.type) {
 			nft_chain_release_hook(&hook);
+			NL_SET_BAD_ATTR(extack, attr);
 			return -EEXIST;
 		}
 
@@ -2137,6 +2140,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
 			if (!nft_hook_list_equal(&basechain->hook_list,
 						 &hook.list)) {
 				nft_chain_release_hook(&hook);
+				NL_SET_BAD_ATTR(extack, attr);
 				return -EEXIST;
 			}
 		} else {
@@ -2144,6 +2148,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
 			if (ops->hooknum != hook.num ||
 			    ops->priority != hook.priority) {
 				nft_chain_release_hook(&hook);
+				NL_SET_BAD_ATTR(extack, attr);
 				return -EEXIST;
 			}
 		}
@@ -2156,8 +2161,10 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
 
 		chain2 = nft_chain_lookup(ctx->net, table,
 					  nla[NFTA_CHAIN_NAME], genmask);
-		if (!IS_ERR(chain2))
+		if (!IS_ERR(chain2)) {
+			NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
 			return -EEXIST;
+		}
 	}
 
 	if (nla[NFTA_CHAIN_COUNTERS]) {
@@ -2200,6 +2207,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
 			    nft_trans_chain_update(tmp) &&
 			    nft_trans_chain_name(tmp) &&
 			    strcmp(name, nft_trans_chain_name(tmp)) == 0) {
+				NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
 				kfree(name);
 				goto err;
 			}
@@ -2322,7 +2330,8 @@ static int nf_tables_newchain(struct net *net, struct sock *nlsk,
 			return -EOPNOTSUPP;
 
 		flags |= chain->flags & NFT_CHAIN_BASE;
-		return nf_tables_updchain(&ctx, genmask, policy, flags);
+		return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
+					  extack);
 	}
 
 	return nf_tables_addchain(&ctx, family, genmask, policy, flags);
diff --git a/tools/testing/selftests/netfilter/nf-queue.c b/tools/testing/selftests/netfilter/nf-queue.c
index 29c73bce38fa..9e56b9d47037 100644
--- a/tools/testing/selftests/netfilter/nf-queue.c
+++ b/tools/testing/selftests/netfilter/nf-queue.c
@@ -17,9 +17,12 @@
 
 struct options {
 	bool count_packets;
+	bool gso_enabled;
 	int verbose;
 	unsigned int queue_num;
 	unsigned int timeout;
+	uint32_t verdict;
+	uint32_t delay_ms;
 };
 
 static unsigned int queue_stats[5];
@@ -27,7 +30,7 @@ static struct options opts;
 
 static void help(const char *p)
 {
-	printf("Usage: %s [-c|-v [-vv] ] [-t timeout] [-q queue_num]\n", p);
+	printf("Usage: %s [-c|-v [-vv] ] [-t timeout] [-q queue_num] [-Qdst_queue ] [ -d ms_delay ] [-G]\n", p);
 }
 
 static int parse_attr_cb(const struct nlattr *attr, void *data)
@@ -162,7 +165,7 @@ nfq_build_cfg_params(char *buf, uint8_t mode, int range, int queue_num)
 }
 
 static struct nlmsghdr *
-nfq_build_verdict(char *buf, int id, int queue_num, int verd)
+nfq_build_verdict(char *buf, int id, int queue_num, uint32_t verd)
 {
 	struct nfqnl_msg_verdict_hdr vh = {
 		.verdict = htonl(verd),
@@ -189,9 +192,6 @@ static void print_stats(void)
 	unsigned int last, total;
 	int i;
 
-	if (!opts.count_packets)
-		return;
-
 	total = 0;
 	last = queue_stats[0];
 
@@ -234,7 +234,8 @@ struct mnl_socket *open_queue(void)
 
 	nlh = nfq_build_cfg_params(buf, NFQNL_COPY_PACKET, 0xFFFF, queue_num);
 
-	flags = NFQA_CFG_F_GSO | NFQA_CFG_F_UID_GID;
+	flags = opts.gso_enabled ? NFQA_CFG_F_GSO : 0;
+	flags |= NFQA_CFG_F_UID_GID;
 	mnl_attr_put_u32(nlh, NFQA_CFG_FLAGS, htonl(flags));
 	mnl_attr_put_u32(nlh, NFQA_CFG_MASK, htonl(flags));
 
@@ -255,6 +256,17 @@ struct mnl_socket *open_queue(void)
 	return nl;
 }
 
+static void sleep_ms(uint32_t delay)
+{
+	struct timespec ts = { .tv_sec = delay / 1000 };
+
+	delay %= 1000;
+
+	ts.tv_nsec = delay * 1000llu * 1000llu;
+
+	nanosleep(&ts, NULL);
+}
+
 static int mainloop(void)
 {
 	unsigned int buflen = 64 * 1024 + MNL_SOCKET_BUFFER_SIZE;
@@ -278,7 +290,7 @@ static int mainloop(void)
 
 		ret = mnl_socket_recvfrom(nl, buf, buflen);
 		if (ret == -1) {
-			if (errno == ENOBUFS)
+			if (errno == ENOBUFS || errno == EINTR)
 				continue;
 
 			if (errno == EAGAIN) {
@@ -298,7 +310,10 @@ static int mainloop(void)
 		}
 
 		id = ret - MNL_CB_OK;
-		nlh = nfq_build_verdict(buf, id, opts.queue_num, NF_ACCEPT);
+		if (opts.delay_ms)
+			sleep_ms(opts.delay_ms);
+
+		nlh = nfq_build_verdict(buf, id, opts.queue_num, opts.verdict);
 		if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
 			perror("mnl_socket_sendto");
 			exit(EXIT_FAILURE);
@@ -314,7 +329,7 @@ static void parse_opts(int argc, char **argv)
 {
 	int c;
 
-	while ((c = getopt(argc, argv, "chvt:q:")) != -1) {
+	while ((c = getopt(argc, argv, "chvt:q:Q:d:G")) != -1) {
 		switch (c) {
 		case 'c':
 			opts.count_packets = true;
@@ -328,20 +343,48 @@ static void parse_opts(int argc, char **argv)
 			if (opts.queue_num > 0xffff)
 				opts.queue_num = 0;
 			break;
+		case 'Q':
+			opts.verdict = atoi(optarg);
+			if (opts.verdict > 0xffff) {
+				fprintf(stderr, "Expected destination queue number\n");
+				exit(1);
+			}
+
+			opts.verdict <<= 16;
+			opts.verdict |= NF_QUEUE;
+			break;
+		case 'd':
+			opts.delay_ms = atoi(optarg);
+			if (opts.delay_ms == 0) {
+				fprintf(stderr, "Expected nonzero delay (in milliseconds)\n");
+				exit(1);
+			}
+			break;
 		case 't':
 			opts.timeout = atoi(optarg);
 			break;
+		case 'G':
+			opts.gso_enabled = false;
+			break;
 		case 'v':
 			opts.verbose++;
 			break;
 		}
 	}
+
+	if (opts.verdict != NF_ACCEPT && (opts.verdict >> 16 == opts.queue_num)) {
+		fprintf(stderr, "Cannot use same destination and source queue\n");
+		exit(1);
+	}
 }
 
 int main(int argc, char *argv[])
 {
 	int ret;
 
+	opts.verdict = NF_ACCEPT;
+	opts.gso_enabled = true;
+
 	parse_opts(argc, argv);
 
 	ret = mainloop();
diff --git a/tools/testing/selftests/netfilter/nft_queue.sh b/tools/testing/selftests/netfilter/nft_queue.sh
index 6898448b4266..3d202b90b33d 100755
--- a/tools/testing/selftests/netfilter/nft_queue.sh
+++ b/tools/testing/selftests/netfilter/nft_queue.sh
@@ -12,6 +12,7 @@ sfx=$(mktemp -u "XXXXXXXX")
 ns1="ns1-$sfx"
 ns2="ns2-$sfx"
 nsrouter="nsrouter-$sfx"
+timeout=4
 
 cleanup()
 {
@@ -20,6 +21,7 @@ cleanup()
 	ip netns del ${nsrouter}
 	rm -f "$TMPFILE0"
 	rm -f "$TMPFILE1"
+	rm -f "$TMPFILE2" "$TMPFILE3"
 }
 
 nft --version > /dev/null 2>&1
@@ -42,6 +44,8 @@ fi
 
 TMPFILE0=$(mktemp)
 TMPFILE1=$(mktemp)
+TMPFILE2=$(mktemp)
+TMPFILE3=$(mktemp)
 trap cleanup EXIT
 
 ip netns add ${ns1}
@@ -83,7 +87,7 @@ load_ruleset() {
 	local name=$1
 	local prio=$2
 
-ip netns exec ${nsrouter} nft -f - <<EOF
+ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF
 table inet $name {
 	chain nfq {
 		ip protocol icmp queue bypass
@@ -118,7 +122,7 @@ EOF
 load_counter_ruleset() {
 	local prio=$1
 
-ip netns exec ${nsrouter} nft -f - <<EOF
+ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF
 table inet countrules {
 	chain pre {
 		type filter hook prerouting priority $prio; policy accept;
@@ -175,7 +179,7 @@ test_ping_router() {
 test_queue_blackhole() {
 	local proto=$1
 
-ip netns exec ${nsrouter} nft -f - <<EOF
+ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF
 table $proto blackh {
 	chain forward {
 	type filter hook forward priority 0; policy accept;
@@ -184,10 +188,10 @@ table $proto blackh {
 }
 EOF
 	if [ $proto = "ip" ] ;then
-		ip netns exec ${ns1} ping -c 1 -q 10.0.2.99 > /dev/null
+		ip netns exec ${ns1} ping -W 2 -c 1 -q 10.0.2.99 > /dev/null
 		lret=$?
 	elif [ $proto = "ip6" ]; then
-		ip netns exec ${ns1} ping -c 1 -q dead:2::99 > /dev/null
+		ip netns exec ${ns1} ping -W 2 -c 1 -q dead:2::99 > /dev/null
 		lret=$?
 	else
 		lret=111
@@ -214,8 +218,8 @@ test_queue()
 	local last=""
 
 	# spawn nf-queue listeners
-	ip netns exec ${nsrouter} ./nf-queue -c -q 0 -t 3 > "$TMPFILE0" &
-	ip netns exec ${nsrouter} ./nf-queue -c -q 1 -t 3 > "$TMPFILE1" &
+	ip netns exec ${nsrouter} ./nf-queue -c -q 0 -t $timeout > "$TMPFILE0" &
+	ip netns exec ${nsrouter} ./nf-queue -c -q 1 -t $timeout > "$TMPFILE1" &
 	sleep 1
 	test_ping
 	ret=$?
@@ -250,11 +254,11 @@ test_queue()
 
 test_tcp_forward()
 {
-	ip netns exec ${nsrouter} ./nf-queue -q 2 -t 10 &
+	ip netns exec ${nsrouter} ./nf-queue -q 2 -t $timeout &
 	local nfqpid=$!
 
 	tmpfile=$(mktemp) || exit 1
-	dd conv=sparse status=none if=/dev/zero bs=1M count=100 of=$tmpfile
+	dd conv=sparse status=none if=/dev/zero bs=1M count=200 of=$tmpfile
 	ip netns exec ${ns2} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null &
 	local rpid=$!
 
@@ -270,15 +274,13 @@ test_tcp_forward()
 
 test_tcp_localhost()
 {
-	tc -net "${nsrouter}" qdisc add dev lo root netem loss random 1%
-
 	tmpfile=$(mktemp) || exit 1
 
-	dd conv=sparse status=none if=/dev/zero bs=1M count=900 of=$tmpfile
+	dd conv=sparse status=none if=/dev/zero bs=1M count=200 of=$tmpfile
 	ip netns exec ${nsrouter} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null &
 	local rpid=$!
 
-	ip netns exec ${nsrouter} ./nf-queue -q 3 -t 30 &
+	ip netns exec ${nsrouter} ./nf-queue -q 3 -t $timeout &
 	local nfqpid=$!
 
 	sleep 1
@@ -287,6 +289,47 @@ test_tcp_localhost()
 
 	wait $rpid
 	[ $? -eq 0 ] && echo "PASS: tcp via loopback"
+	wait 2>/dev/null
+}
+
+test_tcp_localhost_requeue()
+{
+ip netns exec ${nsrouter} nft -f /dev/stdin <<EOF
+flush ruleset
+table inet filter {
+	chain output {
+		type filter hook output priority 0; policy accept;
+		tcp dport 12345 limit rate 1/second burst 1 packets counter queue num 0
+	}
+	chain post {
+		type filter hook postrouting priority 0; policy accept;
+		tcp dport 12345 limit rate 1/second burst 1 packets counter queue num 0
+	}
+}
+EOF
+	tmpfile=$(mktemp) || exit 1
+	dd conv=sparse status=none if=/dev/zero bs=1M count=200 of=$tmpfile
+	ip netns exec ${nsrouter} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null &
+	local rpid=$!
+
+	ip netns exec ${nsrouter} ./nf-queue -c -q 1 -t $timeout > "$TMPFILE2" &
+
+	# nfqueue 1 will be called via output hook.  But this time,
+        # re-queue the packet to nfqueue program on queue 2.
+	ip netns exec ${nsrouter} ./nf-queue -G -d 150 -c -q 0 -Q 1 -t $timeout > "$TMPFILE3" &
+
+	sleep 1
+	ip netns exec ${nsrouter} nc -w 5 127.0.0.1 12345 <"$tmpfile" > /dev/null
+	rm -f "$tmpfile"
+
+	wait
+
+	if ! diff -u "$TMPFILE2" "$TMPFILE3" ; then
+		echo "FAIL: lost packets during requeue?!" 1>&2
+		return
+	fi
+
+	echo "PASS: tcp via loopback and re-queueing"
 }
 
 ip netns exec ${nsrouter} sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
@@ -328,5 +371,6 @@ test_queue 20
 
 test_tcp_forward
 test_tcp_localhost
+test_tcp_localhost_requeue
 
 exit $ret