[PATCH 00/18] Netfilter updates for net-next

[PATCH 00/18] Netfilter updates for net-next

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter updates for net-next:

1) Wildcard support for the net,iface set from Kristian Evensen.

2) Offload support for matching on the input interface.

3) Simplify matching on vlan header fields.

4) Add nft_payload_rebuild_vlan_hdr() function to rebuild the vlan
   header from the vlan sk_buff metadata.

5) Pass extack to nft_flow_cls_offload_setup().

6) Add C-VLAN matching support.

7) Use time64_t in xt_time to fix y2038 overflow, from Arnd Bergmann.

8) Use time_t in nft_meta to fix y2038 overflow, also from Arnd.

9) Add flow_action_entry_next() helper function to flowtable offload
   infrastructure.

10) Add IPv6 support to the flowtable offload infrastructure.

11) Support for input interface matching from postrouting,
    from Phil Sutter.

12) Missing check for ndo callback in flowtable offload, from wenxu.

13) Remove conntrack parameter from flow_offload_fill_dir(), from wenxu.

14) Do not pass flow_rule object for rule removal, cookie is sufficient
    to achieve this.

15) Release flow_rule object in case of error from the offload commit
    path.

16) Undo offload ruleset updates if transaction fails.

17) Check for error when binding flowtable callbacks, from wenxu.

18) Always unbind flowtable callbacks when unregistering hooks.

You can pull these changes from:

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

Thanks.

----------------------------------------------------------------

The following changes since commit 90bc72b13c08eedf73b7c0bd94ef23c467800c4a:

  Merge branch 'ARM-Enable-GENET-support-for-RPi-4' (2019-11-12 20:08:00 -0800)

are available in the git repository at:

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

for you to fetch changes up to ff4bf2f42a40e7dff28379f085b64df322c70b45:

  netfilter: nf_tables: add nft_unregister_flowtable_hook() (2019-11-15 23:44:54 +0100)

----------------------------------------------------------------
Arnd Bergmann (2):
      netfilter: xt_time: use time64_t
      netfilter: nft_meta: use 64-bit time arithmetic

Kristian Evensen (1):
      netfilter: ipset: Add wildcard support to net,iface

Pablo Neira Ayuso (12):
      netfilter: nft_meta: offload support for interface index
      netfilter: nft_payload: simplify vlan header handling
      netfilter: nf_tables: add nft_payload_rebuild_vlan_hdr()
      netfilter: nf_tables_offload: pass extack to nft_flow_cls_offload_setup()
      netfilter: nft_payload: add C-VLAN support
      Merge branch 'master' of git://blackhole.kfki.hu/nf-next
      netfilter: nf_flow_table_offload: add flow_action_entry_next() and use it
      netfilter: nf_flow_table_offload: add IPv6 support
      netfilter: nf_tables_offload: remove reference to flow rule from deletion path
      netfilter: nf_tables_offload: release flow_rule on error from commit path
      netfilter: nf_tables_offload: undo updates if transaction fails
      netfilter: nf_tables: add nft_unregister_flowtable_hook()

Phil Sutter (1):
      netfilter: Support iif matches in POSTROUTING

wenxu (3):
      netfilter: nf_flow_table_offload: Fix check ndo_setup_tc when setup_block
      netfilter: nf_flow_table: remove unnecessary parameter in flow_offload_fill_dir
      netfilter: nf_tables: check if bind callback fails and unbind if hook registration fails

 include/net/netfilter/nf_flow_table.h       |   9 +-
 include/net/netfilter/nf_tables_offload.h   |   1 +
 include/uapi/linux/netfilter/ipset/ip_set.h |   2 +
 net/ipv4/ip_output.c                        |   4 +-
 net/ipv4/netfilter/nf_flow_table_ipv4.c     |   2 +-
 net/ipv4/xfrm4_output.c                     |   2 +-
 net/ipv6/ip6_output.c                       |   4 +-
 net/ipv6/netfilter/nf_flow_table_ipv6.c     |   2 +-
 net/ipv6/xfrm6_output.c                     |   2 +-
 net/netfilter/ipset/ip_set_hash_netiface.c  |  23 +++-
 net/netfilter/nf_flow_table_core.c          |   8 +-
 net/netfilter/nf_flow_table_inet.c          |  25 +++-
 net/netfilter/nf_flow_table_offload.c       | 179 +++++++++++++++++++++-------
 net/netfilter/nf_tables_api.c               |  49 ++++++--
 net/netfilter/nf_tables_offload.c           |  95 +++++++++++++--
 net/netfilter/nft_meta.c                    |  14 ++-
 net/netfilter/nft_payload.c                 |  56 +++++----
 net/netfilter/xt_time.c                     |  19 +--
 18 files changed, 370 insertions(+), 126 deletions(-)

[PATCH 01/18] netfilter: ipset: Add wildcard support to net,iface

[Pablo Neira Ayuso]

From: Kristian Evensen <kristian.evensen@gmail.com>

The net,iface equal functions currently compares the full interface
names. In several cases, wildcard (or prefix) matching is useful. For
example, when converting a large iptables rule-set to make use of ipset,
I was able to significantly reduce the number of set elements by making
use of wildcard matching.

Wildcard matching is enabled by adding "wildcard" when adding an element
to a set. Internally, this causes the IPSET_FLAG_IFACE_WILDCARD-flag to
be set.  When this flag is set, only the initial part of the interface
name is used for comparison.

Wildcard matching is done per element and not per set, as there are many
cases where mixing wildcard and non-wildcard elements are useful. This
means that is up to the user to handle (avoid) overlapping interface
names.

Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
---
 include/uapi/linux/netfilter/ipset/ip_set.h |  2 ++
 net/netfilter/ipset/ip_set_hash_netiface.c  | 23 ++++++++++++++++++-----
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/include/uapi/linux/netfilter/ipset/ip_set.h b/include/uapi/linux/netfilter/ipset/ip_set.h
index eea166c52c36..11a72a938eb1 100644
--- a/include/uapi/linux/netfilter/ipset/ip_set.h
+++ b/include/uapi/linux/netfilter/ipset/ip_set.h
@@ -205,6 +205,8 @@ enum ipset_cadt_flags {
 	IPSET_FLAG_WITH_FORCEADD = (1 << IPSET_FLAG_BIT_WITH_FORCEADD),
 	IPSET_FLAG_BIT_WITH_SKBINFO = 6,
 	IPSET_FLAG_WITH_SKBINFO = (1 << IPSET_FLAG_BIT_WITH_SKBINFO),
+	IPSET_FLAG_BIT_IFACE_WILDCARD = 7,
+	IPSET_FLAG_IFACE_WILDCARD = (1 << IPSET_FLAG_BIT_IFACE_WILDCARD),
 	IPSET_FLAG_CADT_MAX	= 15,
 };
 
diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c
index 1a04e0929738..be5e95a0d876 100644
--- a/net/netfilter/ipset/ip_set_hash_netiface.c
+++ b/net/netfilter/ipset/ip_set_hash_netiface.c
@@ -25,7 +25,8 @@
 /*				3    Counters support added */
 /*				4    Comments support added */
 /*				5    Forceadd support added */
-#define IPSET_TYPE_REV_MAX	6 /* skbinfo support added */
+/*				6    skbinfo support added */
+#define IPSET_TYPE_REV_MAX	7 /* interface wildcard support added */
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
@@ -57,6 +58,7 @@ struct hash_netiface4_elem {
 	u8 cidr;
 	u8 nomatch;
 	u8 elem;
+	u8 wildcard;
 	char iface[IFNAMSIZ];
 };
 
@@ -71,7 +73,9 @@ hash_netiface4_data_equal(const struct hash_netiface4_elem *ip1,
 	       ip1->cidr == ip2->cidr &&
 	       (++*multi) &&
 	       ip1->physdev == ip2->physdev &&
-	       strcmp(ip1->iface, ip2->iface) == 0;
+	       (ip1->wildcard ?
+		strncmp(ip1->iface, ip2->iface, strlen(ip1->iface)) == 0 :
+		strcmp(ip1->iface, ip2->iface) == 0);
 }
 
 static int
@@ -103,7 +107,8 @@ static bool
 hash_netiface4_data_list(struct sk_buff *skb,
 			 const struct hash_netiface4_elem *data)
 {
-	u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0;
+	u32 flags = (data->physdev ? IPSET_FLAG_PHYSDEV : 0) |
+		    (data->wildcard ? IPSET_FLAG_IFACE_WILDCARD : 0);
 
 	if (data->nomatch)
 		flags |= IPSET_FLAG_NOMATCH;
@@ -229,6 +234,8 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
 			e.physdev = 1;
 		if (cadt_flags & IPSET_FLAG_NOMATCH)
 			flags |= (IPSET_FLAG_NOMATCH << 16);
+		if (cadt_flags & IPSET_FLAG_IFACE_WILDCARD)
+			e.wildcard = 1;
 	}
 	if (adt == IPSET_TEST || !tb[IPSET_ATTR_IP_TO]) {
 		e.ip = htonl(ip & ip_set_hostmask(e.cidr));
@@ -280,6 +287,7 @@ struct hash_netiface6_elem {
 	u8 cidr;
 	u8 nomatch;
 	u8 elem;
+	u8 wildcard;
 	char iface[IFNAMSIZ];
 };
 
@@ -294,7 +302,9 @@ hash_netiface6_data_equal(const struct hash_netiface6_elem *ip1,
 	       ip1->cidr == ip2->cidr &&
 	       (++*multi) &&
 	       ip1->physdev == ip2->physdev &&
-	       strcmp(ip1->iface, ip2->iface) == 0;
+	       (ip1->wildcard ?
+		strncmp(ip1->iface, ip2->iface, strlen(ip1->iface)) == 0 :
+		strcmp(ip1->iface, ip2->iface) == 0);
 }
 
 static int
@@ -326,7 +336,8 @@ static bool
 hash_netiface6_data_list(struct sk_buff *skb,
 			 const struct hash_netiface6_elem *data)
 {
-	u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0;
+	u32 flags = (data->physdev ? IPSET_FLAG_PHYSDEV : 0) |
+		    (data->wildcard ? IPSET_FLAG_IFACE_WILDCARD : 0);
 
 	if (data->nomatch)
 		flags |= IPSET_FLAG_NOMATCH;
@@ -440,6 +451,8 @@ hash_netiface6_uadt(struct ip_set *set, struct nlattr *tb[],
 			e.physdev = 1;
 		if (cadt_flags & IPSET_FLAG_NOMATCH)
 			flags |= (IPSET_FLAG_NOMATCH << 16);
+		if (cadt_flags & IPSET_FLAG_IFACE_WILDCARD)
+			e.wildcard = 1;
 	}
 
 	ret = adtfn(set, &e, &ext, &ext, flags);
-- 
2.11.0

[PATCH 02/18] netfilter: nft_meta: offload support for interface index

[Pablo Neira Ayuso]

This patch adds support for offloading the NFT_META_IIF selector.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/netfilter/nf_tables_offload.h | 1 +
 net/netfilter/nft_meta.c                  | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/include/net/netfilter/nf_tables_offload.h b/include/net/netfilter/nf_tables_offload.h
index 03cf5856d76f..ea7d1d78b92d 100644
--- a/include/net/netfilter/nf_tables_offload.h
+++ b/include/net/netfilter/nf_tables_offload.h
@@ -45,6 +45,7 @@ struct nft_flow_key {
 	struct flow_dissector_key_ip			ip;
 	struct flow_dissector_key_vlan			vlan;
 	struct flow_dissector_key_eth_addrs		eth_addrs;
+	struct flow_dissector_key_meta			meta;
 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
 
 struct nft_flow_match {
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index 317e3a9e8c5b..8fd21f436347 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -547,6 +547,10 @@ static int nft_meta_get_offload(struct nft_offload_ctx *ctx,
 				  sizeof(__u8), reg);
 		nft_offload_set_dependency(ctx, NFT_OFFLOAD_DEP_TRANSPORT);
 		break;
+	case NFT_META_IIF:
+		NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_META, meta,
+				  ingress_ifindex, sizeof(__u32), reg);
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
-- 
2.11.0

[PATCH 03/18] netfilter: nft_payload: simplify vlan header handling

[Pablo Neira Ayuso]

If the offset is within the ethernet + vlan header size boundary, then
rebuild the ethernet + vlan header and use it to copy the bytes to the
register. Otherwise, subtract the vlan header size from the offset and
fall back to use skb_copy_bits().

There is one corner case though: If the offset plus the length of the
payload instruction goes over the ethernet + vlan header boundary, then,
fetch as many bytes as possible from the rebuilt ethernet + vlan header
and fall back to copy the remaining bytes through skb_copy_bits().

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Florian Westphal <fw@strlen.de>
---
 net/netfilter/nft_payload.c | 28 +++++++++-------------------
 1 file changed, 9 insertions(+), 19 deletions(-)

diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 5cb2d8908d2a..247799801165 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -28,17 +28,22 @@ static bool
 nft_payload_copy_vlan(u32 *d, const struct sk_buff *skb, u8 offset, u8 len)
 {
 	int mac_off = skb_mac_header(skb) - skb->data;
-	u8 vlan_len, *vlanh, *dst_u8 = (u8 *) d;
+	u8 *vlanh, *dst_u8 = (u8 *) d;
 	struct vlan_ethhdr veth;
 
 	vlanh = (u8 *) &veth;
-	if (offset < ETH_HLEN) {
-		u8 ethlen = min_t(u8, len, ETH_HLEN - offset);
+	if (offset < VLAN_ETH_HLEN) {
+		u8 ethlen = len;
 
 		if (skb_copy_bits(skb, mac_off, &veth, ETH_HLEN))
 			return false;
 
 		veth.h_vlan_proto = skb->vlan_proto;
+		veth.h_vlan_TCI = htons(skb_vlan_tag_get(skb));
+		veth.h_vlan_encapsulated_proto = skb->protocol;
+
+		if (offset + len > VLAN_ETH_HLEN)
+			ethlen -= offset + len - VLAN_ETH_HLEN;
 
 		memcpy(dst_u8, vlanh + offset, ethlen);
 
@@ -48,25 +53,10 @@ nft_payload_copy_vlan(u32 *d, const struct sk_buff *skb, u8 offset, u8 len)
 
 		dst_u8 += ethlen;
 		offset = ETH_HLEN;
-	} else if (offset >= VLAN_ETH_HLEN) {
+	} else {
 		offset -= VLAN_HLEN;
-		goto skip;
 	}
 
-	veth.h_vlan_TCI = htons(skb_vlan_tag_get(skb));
-	veth.h_vlan_encapsulated_proto = skb->protocol;
-
-	vlanh += offset;
-
-	vlan_len = min_t(u8, len, VLAN_ETH_HLEN - offset);
-	memcpy(dst_u8, vlanh, vlan_len);
-
-	len -= vlan_len;
-	if (!len)
-		return true;
-
-	dst_u8 += vlan_len;
- skip:
 	return skb_copy_bits(skb, offset + mac_off, dst_u8, len) == 0;
 }
 
-- 
2.11.0

[PATCH 04/18] netfilter: nf_tables: add nft_payload_rebuild_vlan_hdr()

[Pablo Neira Ayuso]

Wrap the code to rebuild the ethernet + vlan header into a function.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Florian Westphal <fw@strlen.de>
---
 net/netfilter/nft_payload.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 247799801165..3db9c802ea62 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -23,6 +23,19 @@
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 
+static bool nft_payload_rebuild_vlan_hdr(const struct sk_buff *skb, int mac_off,
+					 struct vlan_ethhdr *veth)
+{
+	if (skb_copy_bits(skb, mac_off, veth, ETH_HLEN))
+		return false;
+
+	veth->h_vlan_proto = skb->vlan_proto;
+	veth->h_vlan_TCI = htons(skb_vlan_tag_get(skb));
+	veth->h_vlan_encapsulated_proto = skb->protocol;
+
+	return true;
+}
+
 /* add vlan header into the user buffer for if tag was removed by offloads */
 static bool
 nft_payload_copy_vlan(u32 *d, const struct sk_buff *skb, u8 offset, u8 len)
@@ -35,13 +48,9 @@ nft_payload_copy_vlan(u32 *d, const struct sk_buff *skb, u8 offset, u8 len)
 	if (offset < VLAN_ETH_HLEN) {
 		u8 ethlen = len;
 
-		if (skb_copy_bits(skb, mac_off, &veth, ETH_HLEN))
+		if (!nft_payload_rebuild_vlan_hdr(skb, mac_off, &veth))
 			return false;
 
-		veth.h_vlan_proto = skb->vlan_proto;
-		veth.h_vlan_TCI = htons(skb_vlan_tag_get(skb));
-		veth.h_vlan_encapsulated_proto = skb->protocol;
-
 		if (offset + len > VLAN_ETH_HLEN)
 			ethlen -= offset + len - VLAN_ETH_HLEN;
 
-- 
2.11.0

[PATCH 05/18] netfilter: nf_tables_offload: pass extack to nft_flow_cls_offload_setup()

[Pablo Neira Ayuso]

Otherwise this leads to a stack corruption.

Fixes: c5d275276ff4 ("netfilter: nf_tables_offload: add nft_flow_cls_offload_setup()")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_offload.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index cdea3010c7a0..741045eb530e 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -159,9 +159,9 @@ static void nft_flow_cls_offload_setup(struct flow_cls_offload *cls_flow,
 				       const struct nft_base_chain *basechain,
 				       const struct nft_rule *rule,
 				       const struct nft_flow_rule *flow,
+				       struct netlink_ext_ack *extack,
 				       enum flow_cls_command command)
 {
-	struct netlink_ext_ack extack;
 	__be16 proto = ETH_P_ALL;
 
 	memset(cls_flow, 0, sizeof(*cls_flow));
@@ -170,7 +170,7 @@ static void nft_flow_cls_offload_setup(struct flow_cls_offload *cls_flow,
 		proto = flow->proto;
 
 	nft_flow_offload_common_init(&cls_flow->common, proto,
-				     basechain->ops.priority, &extack);
+				     basechain->ops.priority, extack);
 	cls_flow->command = command;
 	cls_flow->cookie = (unsigned long) rule;
 	if (flow)
@@ -182,6 +182,7 @@ static int nft_flow_offload_rule(struct nft_chain *chain,
 				 struct nft_flow_rule *flow,
 				 enum flow_cls_command command)
 {
+	struct netlink_ext_ack extack = {};
 	struct flow_cls_offload cls_flow;
 	struct nft_base_chain *basechain;
 
@@ -189,7 +190,8 @@ static int nft_flow_offload_rule(struct nft_chain *chain,
 		return -EOPNOTSUPP;
 
 	basechain = nft_base_chain(chain);
-	nft_flow_cls_offload_setup(&cls_flow, basechain, rule, flow, command);
+	nft_flow_cls_offload_setup(&cls_flow, basechain, rule, flow, &extack,
+				   command);
 
 	return nft_setup_cb_call(TC_SETUP_CLSFLOWER, &cls_flow,
 				 &basechain->flow_block.cb_list);
@@ -207,13 +209,15 @@ static int nft_flow_offload_unbind(struct flow_block_offload *bo,
 {
 	struct flow_block_cb *block_cb, *next;
 	struct flow_cls_offload cls_flow;
+	struct netlink_ext_ack extack;
 	struct nft_chain *chain;
 	struct nft_rule *rule;
 
 	chain = &basechain->chain;
 	list_for_each_entry(rule, &chain->rules, list) {
+		memset(&extack, 0, sizeof(extack));
 		nft_flow_cls_offload_setup(&cls_flow, basechain, rule, NULL,
-					   FLOW_CLS_DESTROY);
+					   &extack, FLOW_CLS_DESTROY);
 		nft_setup_cb_call(TC_SETUP_CLSFLOWER, &cls_flow, &bo->cb_list);
 	}
 
-- 
2.11.0

[PATCH 06/18] netfilter: nft_payload: add C-VLAN support

[Pablo Neira Ayuso]

If the encapsulated ethertype announces another inner VLAN header and
the offset falls within the boundaries of the inner VLAN header, then
adjust arithmetics to include the extra VLAN header length and fetch the
bytes from the vlan header in the skbuff data area that represents this
inner VLAN header.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_payload.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 3db9c802ea62..0877d46b8605 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -43,27 +43,36 @@ nft_payload_copy_vlan(u32 *d, const struct sk_buff *skb, u8 offset, u8 len)
 	int mac_off = skb_mac_header(skb) - skb->data;
 	u8 *vlanh, *dst_u8 = (u8 *) d;
 	struct vlan_ethhdr veth;
+	u8 vlan_hlen = 0;
+
+	if ((skb->protocol == htons(ETH_P_8021AD) ||
+	     skb->protocol == htons(ETH_P_8021Q)) &&
+	    offset >= VLAN_ETH_HLEN && offset < VLAN_ETH_HLEN + VLAN_HLEN)
+		vlan_hlen += VLAN_HLEN;
 
 	vlanh = (u8 *) &veth;
-	if (offset < VLAN_ETH_HLEN) {
+	if (offset < VLAN_ETH_HLEN + vlan_hlen) {
 		u8 ethlen = len;
 
-		if (!nft_payload_rebuild_vlan_hdr(skb, mac_off, &veth))
+		if (vlan_hlen &&
+		    skb_copy_bits(skb, mac_off, &veth, VLAN_ETH_HLEN) < 0)
+			return false;
+		else if (!nft_payload_rebuild_vlan_hdr(skb, mac_off, &veth))
 			return false;
 
-		if (offset + len > VLAN_ETH_HLEN)
-			ethlen -= offset + len - VLAN_ETH_HLEN;
+		if (offset + len > VLAN_ETH_HLEN + vlan_hlen)
+			ethlen -= offset + len - VLAN_ETH_HLEN + vlan_hlen;
 
-		memcpy(dst_u8, vlanh + offset, ethlen);
+		memcpy(dst_u8, vlanh + offset - vlan_hlen, ethlen);
 
 		len -= ethlen;
 		if (len == 0)
 			return true;
 
 		dst_u8 += ethlen;
-		offset = ETH_HLEN;
+		offset = ETH_HLEN + vlan_hlen;
 	} else {
-		offset -= VLAN_HLEN;
+		offset -= VLAN_HLEN + vlan_hlen;
 	}
 
 	return skb_copy_bits(skb, offset + mac_off, dst_u8, len) == 0;
-- 
2.11.0

[PATCH 07/18] netfilter: xt_time: use time64_t

[Pablo Neira Ayuso]

From: Arnd Bergmann <arnd@arndb.de>

The current xt_time driver suffers from the y2038 overflow on 32-bit
architectures, when the time of day calculations break.

Also, on both 32-bit and 64-bit architectures, there is a problem with
info->date_start/stop, which is part of the user ABI and overflows in
in 2106.

Fix the first issue by using time64_t and explicit calls to div_u64()
and div_u64_rem(), and document the seconds issue.

The explicit 64-bit division is unfortunately slower on 32-bit
architectures, but doing it as unsigned lets us use the optimized
division-through-multiplication path in most configurations.  This should
be fine, as the code already does not allow any negative time of day
values.

Using u32 seconds values consistently would probably also work and
be a little more efficient, but that doesn't feel right as it would
propagate the y2106 overflow to more place rather than fewer.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/xt_time.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/net/netfilter/xt_time.c b/net/netfilter/xt_time.c
index 8dbb4d48f2ed..67cb98489415 100644
--- a/net/netfilter/xt_time.c
+++ b/net/netfilter/xt_time.c
@@ -77,12 +77,12 @@ static inline bool is_leap(unsigned int y)
  * This is done in three separate functions so that the most expensive
  * calculations are done last, in case a "simple match" can be found earlier.
  */
-static inline unsigned int localtime_1(struct xtm *r, time_t time)
+static inline unsigned int localtime_1(struct xtm *r, time64_t time)
 {
 	unsigned int v, w;
 
 	/* Each day has 86400s, so finding the hour/minute is actually easy. */
-	v         = time % SECONDS_PER_DAY;
+	div_u64_rem(time, SECONDS_PER_DAY, &v);
 	r->second = v % 60;
 	w         = v / 60;
 	r->minute = w % 60;
@@ -90,13 +90,13 @@ static inline unsigned int localtime_1(struct xtm *r, time_t time)
 	return v;
 }
 
-static inline void localtime_2(struct xtm *r, time_t time)
+static inline void localtime_2(struct xtm *r, time64_t time)
 {
 	/*
 	 * Here comes the rest (weekday, monthday). First, divide the SSTE
 	 * by seconds-per-day to get the number of _days_ since the epoch.
 	 */
-	r->dse = time / 86400;
+	r->dse = div_u64(time, SECONDS_PER_DAY);
 
 	/*
 	 * 1970-01-01 (w=0) was a Thursday (4).
@@ -105,7 +105,7 @@ static inline void localtime_2(struct xtm *r, time_t time)
 	r->weekday = (4 + r->dse - 1) % 7 + 1;
 }
 
-static void localtime_3(struct xtm *r, time_t time)
+static void localtime_3(struct xtm *r, time64_t time)
 {
 	unsigned int year, i, w = r->dse;
 
@@ -160,7 +160,7 @@ time_mt(const struct sk_buff *skb, struct xt_action_param *par)
 	const struct xt_time_info *info = par->matchinfo;
 	unsigned int packet_time;
 	struct xtm current_time;
-	s64 stamp;
+	time64_t stamp;
 
 	/*
 	 * We need real time here, but we can neither use skb->tstamp
@@ -173,14 +173,14 @@ time_mt(const struct sk_buff *skb, struct xt_action_param *par)
 	 *	1. match before 13:00
 	 *	2. match after 13:00
 	 *
-	 * If you match against processing time (get_seconds) it
+	 * If you match against processing time (ktime_get_real_seconds) it
 	 * may happen that the same packet matches both rules if
 	 * it arrived at the right moment before 13:00, so it would be
 	 * better to check skb->tstamp and set it via __net_timestamp()
 	 * if needed.  This however breaks outgoing packets tx timestamp,
 	 * and causes them to get delayed forever by fq packet scheduler.
 	 */
-	stamp = get_seconds();
+	stamp = ktime_get_real_seconds();
 
 	if (info->flags & XT_TIME_LOCAL_TZ)
 		/* Adjust for local timezone */
@@ -193,6 +193,9 @@ time_mt(const struct sk_buff *skb, struct xt_action_param *par)
 	 *   - 'now' is in the weekday mask
 	 *   - 'now' is in the daytime range time_start..time_end
 	 * (and by default, libxt_time will set these so as to match)
+	 *
+	 * note: info->date_start/stop are unsigned 32-bit values that
+	 *	 can hold values beyond y2038, but not after y2106.
 	 */
 
 	if (stamp < info->date_start || stamp > info->date_stop)
-- 
2.11.0

[PATCH 08/18] netfilter: nft_meta: use 64-bit time arithmetic

[Pablo Neira Ayuso]

From: Arnd Bergmann <arnd@arndb.de>

On 32-bit architectures, get_seconds() returns an unsigned 32-bit
time value, which also matches the type used in the nft_meta
code. This will not overflow in year 2038 as a time_t would, but
it still suffers from the overflow problem later on in year 2106.

Change this instance to use the time64_t type consistently
and avoid the deprecated get_seconds().

The nft_meta_weekday() calculation potentially gets a little slower
on 32-bit architectures, but now it has the same behavior as on
64-bit architectures and does not overflow.

Fixes: 63d10e12b00d ("netfilter: nft_meta: support for time matching")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_meta.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index 8fd21f436347..8fbea031bd4a 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -33,19 +33,19 @@
 
 static DEFINE_PER_CPU(struct rnd_state, nft_prandom_state);
 
-static u8 nft_meta_weekday(unsigned long secs)
+static u8 nft_meta_weekday(time64_t secs)
 {
 	unsigned int dse;
 	u8 wday;
 
 	secs -= NFT_META_SECS_PER_MINUTE * sys_tz.tz_minuteswest;
-	dse = secs / NFT_META_SECS_PER_DAY;
+	dse = div_u64(secs, NFT_META_SECS_PER_DAY);
 	wday = (4 + dse) % NFT_META_DAYS_PER_WEEK;
 
 	return wday;
 }
 
-static u32 nft_meta_hour(unsigned long secs)
+static u32 nft_meta_hour(time64_t secs)
 {
 	struct tm tm;
 
@@ -250,10 +250,10 @@ void nft_meta_get_eval(const struct nft_expr *expr,
 		nft_reg_store64(dest, ktime_get_real_ns());
 		break;
 	case NFT_META_TIME_DAY:
-		nft_reg_store8(dest, nft_meta_weekday(get_seconds()));
+		nft_reg_store8(dest, nft_meta_weekday(ktime_get_real_seconds()));
 		break;
 	case NFT_META_TIME_HOUR:
-		*dest = nft_meta_hour(get_seconds());
+		*dest = nft_meta_hour(ktime_get_real_seconds());
 		break;
 	default:
 		WARN_ON(1);
-- 
2.11.0

[PATCH 09/18] netfilter: nf_flow_table_offload: add flow_action_entry_next() and use it

[Pablo Neira Ayuso]

This function retrieves a spare action entry from the array of actions.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_flow_table_offload.c | 76 +++++++++++++++++------------------
 1 file changed, 38 insertions(+), 38 deletions(-)

diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index 9be61f47303a..b9f669c80713 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -112,13 +112,22 @@ static void flow_offload_mangle(struct flow_action_entry *entry,
 	memcpy(&entry->mangle.val, value, sizeof(u32));
 }
 
+static inline struct flow_action_entry *
+flow_action_entry_next(struct nf_flow_rule *flow_rule)
+{
+	int i = flow_rule->rule->action.num_entries++;
+
+	return &flow_rule->rule->action.entries[i];
+}
+
 static int flow_offload_eth_src(struct net *net,
 				const struct flow_offload *flow,
 				enum flow_offload_tuple_dir dir,
-				struct flow_action_entry *entry0,
-				struct flow_action_entry *entry1)
+				struct nf_flow_rule *flow_rule)
 {
 	const struct flow_offload_tuple *tuple = &flow->tuplehash[!dir].tuple;
+	struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
+	struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
 	struct net_device *dev;
 	u32 mask, val;
 	u16 val16;
@@ -145,10 +154,11 @@ static int flow_offload_eth_src(struct net *net,
 static int flow_offload_eth_dst(struct net *net,
 				const struct flow_offload *flow,
 				enum flow_offload_tuple_dir dir,
-				struct flow_action_entry *entry0,
-				struct flow_action_entry *entry1)
+				struct nf_flow_rule *flow_rule)
 {
 	const struct flow_offload_tuple *tuple = &flow->tuplehash[dir].tuple;
+	struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
+	struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
 	struct neighbour *n;
 	u32 mask, val;
 	u16 val16;
@@ -175,8 +185,9 @@ static int flow_offload_eth_dst(struct net *net,
 static void flow_offload_ipv4_snat(struct net *net,
 				   const struct flow_offload *flow,
 				   enum flow_offload_tuple_dir dir,
-				   struct flow_action_entry *entry)
+				   struct nf_flow_rule *flow_rule)
 {
+	struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
 	u32 mask = ~htonl(0xffffffff);
 	__be32 addr;
 	u32 offset;
@@ -201,8 +212,9 @@ static void flow_offload_ipv4_snat(struct net *net,
 static void flow_offload_ipv4_dnat(struct net *net,
 				   const struct flow_offload *flow,
 				   enum flow_offload_tuple_dir dir,
-				   struct flow_action_entry *entry)
+				   struct nf_flow_rule *flow_rule)
 {
+	struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
 	u32 mask = ~htonl(0xffffffff);
 	__be32 addr;
 	u32 offset;
@@ -246,8 +258,9 @@ static int flow_offload_l4proto(const struct flow_offload *flow)
 static void flow_offload_port_snat(struct net *net,
 				   const struct flow_offload *flow,
 				   enum flow_offload_tuple_dir dir,
-				   struct flow_action_entry *entry)
+				   struct nf_flow_rule *flow_rule)
 {
+	struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
 	u32 mask = ~htonl(0xffff0000);
 	__be16 port;
 	u32 offset;
@@ -272,8 +285,9 @@ static void flow_offload_port_snat(struct net *net,
 static void flow_offload_port_dnat(struct net *net,
 				   const struct flow_offload *flow,
 				   enum flow_offload_tuple_dir dir,
-				   struct flow_action_entry *entry)
+				   struct nf_flow_rule *flow_rule)
 {
+	struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
 	u32 mask = ~htonl(0xffff);
 	__be16 port;
 	u32 offset;
@@ -297,9 +311,10 @@ static void flow_offload_port_dnat(struct net *net,
 
 static void flow_offload_ipv4_checksum(struct net *net,
 				       const struct flow_offload *flow,
-				       struct flow_action_entry *entry)
+				       struct nf_flow_rule *flow_rule)
 {
 	u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
+	struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
 
 	entry->id = FLOW_ACTION_CSUM;
 	entry->csum_flags = TCA_CSUM_UPDATE_FLAG_IPV4HDR;
@@ -316,8 +331,9 @@ static void flow_offload_ipv4_checksum(struct net *net,
 
 static void flow_offload_redirect(const struct flow_offload *flow,
 				  enum flow_offload_tuple_dir dir,
-				  struct flow_action_entry *entry)
+				  struct nf_flow_rule *flow_rule)
 {
+	struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
 	struct rtable *rt;
 
 	rt = (struct rtable *)flow->tuplehash[dir].tuple.dst_cache;
@@ -330,39 +346,25 @@ int nf_flow_rule_route(struct net *net, const struct flow_offload *flow,
 		       enum flow_offload_tuple_dir dir,
 		       struct nf_flow_rule *flow_rule)
 {
-	int i;
-
-	if (flow_offload_eth_src(net, flow, dir,
-				 &flow_rule->rule->action.entries[0],
-				 &flow_rule->rule->action.entries[1]) < 0)
+	if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
+	    flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
 		return -1;
 
-	if (flow_offload_eth_dst(net, flow, dir,
-				 &flow_rule->rule->action.entries[2],
-				 &flow_rule->rule->action.entries[3]) < 0)
-		return -1;
-
-	i = 4;
 	if (flow->flags & FLOW_OFFLOAD_SNAT) {
-		flow_offload_ipv4_snat(net, flow, dir,
-				       &flow_rule->rule->action.entries[i++]);
-		flow_offload_port_snat(net, flow, dir,
-				       &flow_rule->rule->action.entries[i++]);
+		flow_offload_ipv4_snat(net, flow, dir, flow_rule);
+		flow_offload_port_snat(net, flow, dir, flow_rule);
 	}
 	if (flow->flags & FLOW_OFFLOAD_DNAT) {
-		flow_offload_ipv4_dnat(net, flow, dir,
-				       &flow_rule->rule->action.entries[i++]);
-		flow_offload_port_dnat(net, flow, dir,
-				       &flow_rule->rule->action.entries[i++]);
+		flow_offload_ipv4_dnat(net, flow, dir, flow_rule);
+		flow_offload_port_dnat(net, flow, dir, flow_rule);
 	}
 	if (flow->flags & FLOW_OFFLOAD_SNAT ||
 	    flow->flags & FLOW_OFFLOAD_DNAT)
-		flow_offload_ipv4_checksum(net, flow,
-					   &flow_rule->rule->action.entries[i++]);
+		flow_offload_ipv4_checksum(net, flow, flow_rule);
 
-	flow_offload_redirect(flow, dir, &flow_rule->rule->action.entries[i++]);
+	flow_offload_redirect(flow, dir, flow_rule);
 
-	return i;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(nf_flow_rule_route);
 
@@ -375,7 +377,7 @@ nf_flow_offload_rule_alloc(struct net *net,
 	const struct flow_offload *flow = offload->flow;
 	const struct flow_offload_tuple *tuple;
 	struct nf_flow_rule *flow_rule;
-	int err = -ENOMEM, num_actions;
+	int err = -ENOMEM;
 
 	flow_rule = kzalloc(sizeof(*flow_rule), GFP_KERNEL);
 	if (!flow_rule)
@@ -394,12 +396,10 @@ nf_flow_offload_rule_alloc(struct net *net,
 	if (err < 0)
 		goto err_flow_match;
 
-	num_actions = flowtable->type->action(net, flow, dir, flow_rule);
-	if (num_actions < 0)
+	flow_rule->rule->action.num_entries = 0;
+	if (flowtable->type->action(net, flow, dir, flow_rule) < 0)
 		goto err_flow_match;
 
-	flow_rule->rule->action.num_entries = num_actions;
-
 	return flow_rule;
 
 err_flow_match:
-- 
2.11.0

[PATCH 10/18] netfilter: nf_flow_table_offload: add IPv6 support

[Pablo Neira Ayuso]

Add nf_flow_rule_route_ipv6() and use it from the IPv6 and the inet
flowtable type definitions. Rename the nf_flow_rule_route() function to
nf_flow_rule_route_ipv4().

Adjust maximum number of actions, which now becomes 16 to leave
sufficient room for the IPv6 address mangling for NAT.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/netfilter/nf_flow_table.h   |   9 ++-
 net/ipv4/netfilter/nf_flow_table_ipv4.c |   2 +-
 net/ipv6/netfilter/nf_flow_table_ipv6.c |   2 +-
 net/netfilter/nf_flow_table_inet.c      |  25 +++++++-
 net/netfilter/nf_flow_table_offload.c   | 100 ++++++++++++++++++++++++++++++--
 5 files changed, 127 insertions(+), 11 deletions(-)

diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
index eea66de328d3..f0897b3c97fb 100644
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -163,9 +163,12 @@ void nf_flow_table_offload_flush(struct nf_flowtable *flowtable);
 int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
 				struct net_device *dev,
 				enum flow_block_command cmd);
-int nf_flow_rule_route(struct net *net, const struct flow_offload *flow,
-		       enum flow_offload_tuple_dir dir,
-		       struct nf_flow_rule *flow_rule);
+int nf_flow_rule_route_ipv4(struct net *net, const struct flow_offload *flow,
+			    enum flow_offload_tuple_dir dir,
+			    struct nf_flow_rule *flow_rule);
+int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
+			    enum flow_offload_tuple_dir dir,
+			    struct nf_flow_rule *flow_rule);
 
 int nf_flow_table_offload_init(void);
 void nf_flow_table_offload_exit(void);
diff --git a/net/ipv4/netfilter/nf_flow_table_ipv4.c b/net/ipv4/netfilter/nf_flow_table_ipv4.c
index 168b72e18be0..e32e41b99f0f 100644
--- a/net/ipv4/netfilter/nf_flow_table_ipv4.c
+++ b/net/ipv4/netfilter/nf_flow_table_ipv4.c
@@ -10,7 +10,7 @@ static struct nf_flowtable_type flowtable_ipv4 = {
 	.family		= NFPROTO_IPV4,
 	.init		= nf_flow_table_init,
 	.setup		= nf_flow_table_offload_setup,
-	.action		= nf_flow_rule_route,
+	.action		= nf_flow_rule_route_ipv4,
 	.free		= nf_flow_table_free,
 	.hook		= nf_flow_offload_ip_hook,
 	.owner		= THIS_MODULE,
diff --git a/net/ipv6/netfilter/nf_flow_table_ipv6.c b/net/ipv6/netfilter/nf_flow_table_ipv6.c
index f069bc0dc056..a8566ee12e83 100644
--- a/net/ipv6/netfilter/nf_flow_table_ipv6.c
+++ b/net/ipv6/netfilter/nf_flow_table_ipv6.c
@@ -11,7 +11,7 @@ static struct nf_flowtable_type flowtable_ipv6 = {
 	.family		= NFPROTO_IPV6,
 	.init		= nf_flow_table_init,
 	.setup		= nf_flow_table_offload_setup,
-	.action		= nf_flow_rule_route,
+	.action		= nf_flow_rule_route_ipv6,
 	.free		= nf_flow_table_free,
 	.hook		= nf_flow_offload_ipv6_hook,
 	.owner		= THIS_MODULE,
diff --git a/net/netfilter/nf_flow_table_inet.c b/net/netfilter/nf_flow_table_inet.c
index bfb910b874ce..88bedf1ff1ae 100644
--- a/net/netfilter/nf_flow_table_inet.c
+++ b/net/netfilter/nf_flow_table_inet.c
@@ -21,11 +21,34 @@ nf_flow_offload_inet_hook(void *priv, struct sk_buff *skb,
 	return NF_ACCEPT;
 }
 
+static int nf_flow_rule_route_inet(struct net *net,
+				   const struct flow_offload *flow,
+				   enum flow_offload_tuple_dir dir,
+				   struct nf_flow_rule *flow_rule)
+{
+	const struct flow_offload_tuple *flow_tuple = &flow->tuplehash[dir].tuple;
+	int err;
+
+	switch (flow_tuple->l3proto) {
+	case NFPROTO_IPV4:
+		err = nf_flow_rule_route_ipv4(net, flow, dir, flow_rule);
+		break;
+	case NFPROTO_IPV6:
+		err = nf_flow_rule_route_ipv6(net, flow, dir, flow_rule);
+		break;
+	default:
+		err = -1;
+		break;
+	}
+
+	return err;
+}
+
 static struct nf_flowtable_type flowtable_inet = {
 	.family		= NFPROTO_INET,
 	.init		= nf_flow_table_init,
 	.setup		= nf_flow_table_offload_setup,
-	.action		= nf_flow_rule_route,
+	.action		= nf_flow_rule_route_inet,
 	.free		= nf_flow_table_free,
 	.hook		= nf_flow_offload_inet_hook,
 	.owner		= THIS_MODULE,
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index b9f669c80713..a14932748bcf 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -236,6 +236,71 @@ static void flow_offload_ipv4_dnat(struct net *net,
 			    (u8 *)&addr, (u8 *)&mask);
 }
 
+static void flow_offload_ipv6_mangle(struct nf_flow_rule *flow_rule,
+				     unsigned int offset,
+				     u8 *addr, u8 *mask)
+{
+	struct flow_action_entry *entry;
+	int i;
+
+	for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32)) {
+		entry = flow_action_entry_next(flow_rule);
+		flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
+				    offset + i,
+				    &addr[i], mask);
+	}
+}
+
+static void flow_offload_ipv6_snat(struct net *net,
+				   const struct flow_offload *flow,
+				   enum flow_offload_tuple_dir dir,
+				   struct nf_flow_rule *flow_rule)
+{
+	u32 mask = ~htonl(0xffffffff);
+	const u8 *addr;
+	u32 offset;
+
+	switch (dir) {
+	case FLOW_OFFLOAD_DIR_ORIGINAL:
+		addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v6.s6_addr;
+		offset = offsetof(struct ipv6hdr, saddr);
+		break;
+	case FLOW_OFFLOAD_DIR_REPLY:
+		addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v6.s6_addr;
+		offset = offsetof(struct ipv6hdr, daddr);
+		break;
+	default:
+		return;
+	}
+
+	flow_offload_ipv6_mangle(flow_rule, offset, (u8 *)addr, (u8 *)&mask);
+}
+
+static void flow_offload_ipv6_dnat(struct net *net,
+				   const struct flow_offload *flow,
+				   enum flow_offload_tuple_dir dir,
+				   struct nf_flow_rule *flow_rule)
+{
+	u32 mask = ~htonl(0xffffffff);
+	const u8 *addr;
+	u32 offset;
+
+	switch (dir) {
+	case FLOW_OFFLOAD_DIR_ORIGINAL:
+		addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v6.s6_addr;
+		offset = offsetof(struct ipv6hdr, daddr);
+		break;
+	case FLOW_OFFLOAD_DIR_REPLY:
+		addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v6.s6_addr;
+		offset = offsetof(struct ipv6hdr, saddr);
+		break;
+	default:
+		return;
+	}
+
+	flow_offload_ipv6_mangle(flow_rule, offset, (u8 *)addr, (u8 *)&mask);
+}
+
 static int flow_offload_l4proto(const struct flow_offload *flow)
 {
 	u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
@@ -342,9 +407,9 @@ static void flow_offload_redirect(const struct flow_offload *flow,
 	dev_hold(rt->dst.dev);
 }
 
-int nf_flow_rule_route(struct net *net, const struct flow_offload *flow,
-		       enum flow_offload_tuple_dir dir,
-		       struct nf_flow_rule *flow_rule)
+int nf_flow_rule_route_ipv4(struct net *net, const struct flow_offload *flow,
+			    enum flow_offload_tuple_dir dir,
+			    struct nf_flow_rule *flow_rule)
 {
 	if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
 	    flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
@@ -366,7 +431,32 @@ int nf_flow_rule_route(struct net *net, const struct flow_offload *flow,
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(nf_flow_rule_route);
+EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv4);
+
+int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
+			    enum flow_offload_tuple_dir dir,
+			    struct nf_flow_rule *flow_rule)
+{
+	if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
+	    flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
+		return -1;
+
+	if (flow->flags & FLOW_OFFLOAD_SNAT) {
+		flow_offload_ipv6_snat(net, flow, dir, flow_rule);
+		flow_offload_port_snat(net, flow, dir, flow_rule);
+	}
+	if (flow->flags & FLOW_OFFLOAD_DNAT) {
+		flow_offload_ipv6_dnat(net, flow, dir, flow_rule);
+		flow_offload_port_dnat(net, flow, dir, flow_rule);
+	}
+
+	flow_offload_redirect(flow, dir, flow_rule);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv6);
+
+#define NF_FLOW_RULE_ACTION_MAX	16
 
 static struct nf_flow_rule *
 nf_flow_offload_rule_alloc(struct net *net,
@@ -383,7 +473,7 @@ nf_flow_offload_rule_alloc(struct net *net,
 	if (!flow_rule)
 		goto err_flow;
 
-	flow_rule->rule = flow_rule_alloc(10);
+	flow_rule->rule = flow_rule_alloc(NF_FLOW_RULE_ACTION_MAX);
 	if (!flow_rule->rule)
 		goto err_flow_rule;
 
-- 
2.11.0

[PATCH 11/18] netfilter: Support iif matches in POSTROUTING

[Pablo Neira Ayuso]

From: Phil Sutter <phil@nwl.cc>

Instead of generally passing NULL to NF_HOOK_COND() for input device,
pass skb->dev which contains input device for routed skbs.

Note that iptables (both legacy and nft) reject rules with input
interface match from being added to POSTROUTING chains, but nftables
allows this.

Cc: Eric Garver <eric@garver.life>
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv4/ip_output.c    | 4 ++--
 net/ipv4/xfrm4_output.c | 2 +-
 net/ipv6/ip6_output.c   | 4 ++--
 net/ipv6/xfrm6_output.c | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 3d8baaaf7086..9d83cb320dcb 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -422,7 +422,7 @@ int ip_mc_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 
 int ip_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
-	struct net_device *dev = skb_dst(skb)->dev;
+	struct net_device *dev = skb_dst(skb)->dev, *indev = skb->dev;
 
 	IP_UPD_PO_STATS(net, IPSTATS_MIB_OUT, skb->len);
 
@@ -430,7 +430,7 @@ int ip_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 	skb->protocol = htons(ETH_P_IP);
 
 	return NF_HOOK_COND(NFPROTO_IPV4, NF_INET_POST_ROUTING,
-			    net, sk, skb, NULL, dev,
+			    net, sk, skb, indev, dev,
 			    ip_finish_output,
 			    !(IPCB(skb)->flags & IPSKB_REROUTED));
 }
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index ecff3fce9807..89ba7c87de5d 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -92,7 +92,7 @@ static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
 	return NF_HOOK_COND(NFPROTO_IPV4, NF_INET_POST_ROUTING,
-			    net, sk, skb, NULL, skb_dst(skb)->dev,
+			    net, sk, skb, skb->dev, skb_dst(skb)->dev,
 			    __xfrm4_output,
 			    !(IPCB(skb)->flags & IPSKB_REROUTED));
 }
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 71827b56c006..945508a7cb0f 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -160,7 +160,7 @@ static int ip6_finish_output(struct net *net, struct sock *sk, struct sk_buff *s
 
 int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
-	struct net_device *dev = skb_dst(skb)->dev;
+	struct net_device *dev = skb_dst(skb)->dev, *indev = skb->dev;
 	struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
 
 	skb->protocol = htons(ETH_P_IPV6);
@@ -173,7 +173,7 @@ int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 	}
 
 	return NF_HOOK_COND(NFPROTO_IPV6, NF_INET_POST_ROUTING,
-			    net, sk, skb, NULL, dev,
+			    net, sk, skb, indev, dev,
 			    ip6_finish_output,
 			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));
 }
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index eecac1b7148e..fbe51d40bd7e 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -187,7 +187,7 @@ static int __xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
 	return NF_HOOK_COND(NFPROTO_IPV6, NF_INET_POST_ROUTING,
-			    net, sk, skb,  NULL, skb_dst(skb)->dev,
+			    net, sk, skb,  skb->dev, skb_dst(skb)->dev,
 			    __xfrm6_output,
 			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));
 }
-- 
2.11.0

[PATCH 12/18] netfilter: nf_flow_table_offload: Fix check ndo_setup_tc when setup_block

[Pablo Neira Ayuso]

From: wenxu <wenxu@ucloud.cn>

It should check the ndo_setup_tc in the nf_flow_table_offload_setup.

Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_flow_table_offload.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index a14932748bcf..c54c9a6cc981 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -812,6 +812,9 @@ int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
 	if (!(flowtable->flags & NF_FLOWTABLE_HW_OFFLOAD))
 		return 0;
 
+	if (!dev->netdev_ops->ndo_setup_tc)
+		return -EOPNOTSUPP;
+
 	bo.net		= dev_net(dev);
 	bo.block	= &flowtable->flow_block;
 	bo.command	= cmd;
-- 
2.11.0

[PATCH 13/18] netfilter: nf_flow_table: remove unnecessary parameter in flow_offload_fill_dir

[Pablo Neira Ayuso]

From: wenxu <wenxu@ucloud.cn>

The ct object is already in the flow_offload structure, remove it.

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_flow_table_core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 8468d2d02284..9889d52eda82 100644
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -18,11 +18,11 @@ static DEFINE_MUTEX(flowtable_lock);
 static LIST_HEAD(flowtables);
 
 static void
-flow_offload_fill_dir(struct flow_offload *flow, struct nf_conn *ct,
+flow_offload_fill_dir(struct flow_offload *flow,
 		      enum flow_offload_tuple_dir dir)
 {
 	struct flow_offload_tuple *ft = &flow->tuplehash[dir].tuple;
-	struct nf_conntrack_tuple *ctt = &ct->tuplehash[dir].tuple;
+	struct nf_conntrack_tuple *ctt = &flow->ct->tuplehash[dir].tuple;
 
 	ft->dir = dir;
 
@@ -57,8 +57,8 @@ struct flow_offload *flow_offload_alloc(struct nf_conn *ct)
 
 	flow->ct = ct;
 
-	flow_offload_fill_dir(flow, ct, FLOW_OFFLOAD_DIR_ORIGINAL);
-	flow_offload_fill_dir(flow, ct, FLOW_OFFLOAD_DIR_REPLY);
+	flow_offload_fill_dir(flow, FLOW_OFFLOAD_DIR_ORIGINAL);
+	flow_offload_fill_dir(flow, FLOW_OFFLOAD_DIR_REPLY);
 
 	if (ct->status & IPS_SRC_NAT)
 		flow->flags |= FLOW_OFFLOAD_SNAT;
-- 
2.11.0

[PATCH 14/18] netfilter: nf_tables_offload: remove reference to flow rule from deletion path

[Pablo Neira Ayuso]

The cookie is sufficient to delete the rule from the hardware.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_offload.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 741045eb530e..528886bb3481 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -437,8 +437,7 @@ int nft_flow_rule_offload_commit(struct net *net)
 
 			err = nft_flow_offload_rule(trans->ctx.chain,
 						    nft_trans_rule(trans),
-						    nft_trans_flow_rule(trans),
-						    FLOW_CLS_DESTROY);
+						    NULL, FLOW_CLS_DESTROY);
 			break;
 		}
 
-- 
2.11.0

[PATCH 15/18] netfilter: nf_tables_offload: release flow_rule on error from commit path

[Pablo Neira Ayuso]

If hardware offload commit path fails, release all flow_rule objects.

Fixes: c9626a2cbdb2 ("netfilter: nf_tables: add hardware offload support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_offload.c | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 528886bb3481..6d5f3cd7f1b7 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -422,14 +422,14 @@ int nft_flow_rule_offload_commit(struct net *net)
 				continue;
 
 			if (trans->ctx.flags & NLM_F_REPLACE ||
-			    !(trans->ctx.flags & NLM_F_APPEND))
-				return -EOPNOTSUPP;
-
+			    !(trans->ctx.flags & NLM_F_APPEND)) {
+				err = -EOPNOTSUPP;
+				break;
+			}
 			err = nft_flow_offload_rule(trans->ctx.chain,
 						    nft_trans_rule(trans),
 						    nft_trans_flow_rule(trans),
 						    FLOW_CLS_REPLACE);
-			nft_flow_rule_destroy(nft_trans_flow_rule(trans));
 			break;
 		case NFT_MSG_DELRULE:
 			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
@@ -442,7 +442,23 @@ int nft_flow_rule_offload_commit(struct net *net)
 		}
 
 		if (err)
-			return err;
+			break;
+	}
+
+	list_for_each_entry(trans, &net->nft.commit_list, list) {
+		if (trans->ctx.family != NFPROTO_NETDEV)
+			continue;
+
+		switch (trans->msg_type) {
+		case NFT_MSG_NEWRULE:
+			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
+				continue;
+
+			nft_flow_rule_destroy(nft_trans_flow_rule(trans));
+			break;
+		default:
+			break;
+		}
 	}
 
 	return err;
-- 
2.11.0

[PATCH 16/18] netfilter: nf_tables_offload: undo updates if transaction fails

[Pablo Neira Ayuso]

The nft_flow_rule_offload_commit() function might fail after several
successful commands, thus, leaving the hardware filtering policy in
inconsistent state.

This patch adds nft_flow_rule_offload_abort() function which undoes the
updates that have been already processed if one command in this
transaction fails. Hence, the hardware ruleset is left as it was before
this aborted transaction.

The deletion path needs to create the flow_rule object too, in case that
an existing rule needs to be re-added from the abort path.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c     | 11 ++++++++
 net/netfilter/nf_tables_offload.c | 54 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 2dc636faa322..4f0d880a8496 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -361,6 +361,7 @@ static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
 
 static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
 {
+	struct nft_flow_rule *flow;
 	struct nft_trans *trans;
 	int err;
 
@@ -368,6 +369,16 @@ static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
 	if (trans == NULL)
 		return -ENOMEM;
 
+	if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
+		flow = nft_flow_rule_create(ctx->net, rule);
+		if (IS_ERR(flow)) {
+			nft_trans_destroy(trans);
+			return PTR_ERR(flow);
+		}
+
+		nft_trans_flow_rule(trans) = flow;
+	}
+
 	err = nf_tables_delrule_deactivate(ctx, rule);
 	if (err < 0) {
 		nft_trans_destroy(trans);
diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index 6d5f3cd7f1b7..68f17a6921d8 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -389,6 +389,55 @@ static int nft_flow_offload_chain(struct nft_chain *chain, u8 *ppolicy,
 	return nft_flow_block_chain(basechain, NULL, cmd);
 }
 
+static void nft_flow_rule_offload_abort(struct net *net,
+					struct nft_trans *trans)
+{
+	int err = 0;
+
+	list_for_each_entry_continue_reverse(trans, &net->nft.commit_list, list) {
+		if (trans->ctx.family != NFPROTO_NETDEV)
+			continue;
+
+		switch (trans->msg_type) {
+		case NFT_MSG_NEWCHAIN:
+			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD) ||
+			    nft_trans_chain_update(trans))
+				continue;
+
+			err = nft_flow_offload_chain(trans->ctx.chain, NULL,
+						     FLOW_BLOCK_UNBIND);
+			break;
+		case NFT_MSG_DELCHAIN:
+			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
+				continue;
+
+			err = nft_flow_offload_chain(trans->ctx.chain, NULL,
+						     FLOW_BLOCK_BIND);
+			break;
+		case NFT_MSG_NEWRULE:
+			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
+				continue;
+
+			err = nft_flow_offload_rule(trans->ctx.chain,
+						    nft_trans_rule(trans),
+						    NULL, FLOW_CLS_DESTROY);
+			break;
+		case NFT_MSG_DELRULE:
+			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
+				continue;
+
+			err = nft_flow_offload_rule(trans->ctx.chain,
+						    nft_trans_rule(trans),
+						    nft_trans_flow_rule(trans),
+						    FLOW_CLS_REPLACE);
+			break;
+		}
+
+		if (WARN_ON_ONCE(err))
+			break;
+	}
+}
+
 int nft_flow_rule_offload_commit(struct net *net)
 {
 	struct nft_trans *trans;
@@ -441,8 +490,10 @@ int nft_flow_rule_offload_commit(struct net *net)
 			break;
 		}
 
-		if (err)
+		if (err) {
+			nft_flow_rule_offload_abort(net, trans);
 			break;
+		}
 	}
 
 	list_for_each_entry(trans, &net->nft.commit_list, list) {
@@ -451,6 +502,7 @@ int nft_flow_rule_offload_commit(struct net *net)
 
 		switch (trans->msg_type) {
 		case NFT_MSG_NEWRULE:
+		case NFT_MSG_DELRULE:
 			if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
 				continue;
 
-- 
2.11.0

[PATCH 17/18] netfilter: nf_tables: check if bind callback fails and unbind if hook registration fails

[Pablo Neira Ayuso]

From: wenxu <wenxu@ucloud.cn>

Undo the callback binding before unregistering the existing hooks. This
should also check for error of the bind setup call.

Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 4f0d880a8496..9340b976d85c 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6006,12 +6006,20 @@ static int nft_register_flowtable_net_hooks(struct net *net,
 			}
 		}
 
-		flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
-					    FLOW_BLOCK_BIND);
-		err = nf_register_net_hook(net, &hook->ops);
+		err = flowtable->data.type->setup(&flowtable->data,
+						  hook->ops.dev,
+						  FLOW_BLOCK_BIND);
 		if (err < 0)
 			goto err_unregister_net_hooks;
 
+		err = nf_register_net_hook(net, &hook->ops);
+		if (err < 0) {
+			flowtable->data.type->setup(&flowtable->data,
+						    hook->ops.dev,
+						    FLOW_BLOCK_UNBIND);
+			goto err_unregister_net_hooks;
+		}
+
 		i++;
 	}
 
-- 
2.11.0

[PATCH 18/18] netfilter: nf_tables: add nft_unregister_flowtable_hook()

[Pablo Neira Ayuso]

Unbind flowtable callback if hook is unregistered.

This patch is implicitly fixing the error path of
nf_tables_newflowtable() and nft_flowtable_event().

Fixes: 8bb69f3b2918 ("netfilter: nf_tables: add flowtable offload control plane")
Reported-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 9340b976d85c..ff04cdc87f76 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -5975,16 +5975,22 @@ nft_flowtable_type_get(struct net *net, u8 family)
 	return ERR_PTR(-ENOENT);
 }
 
+static void nft_unregister_flowtable_hook(struct net *net,
+					  struct nft_flowtable *flowtable,
+					  struct nft_hook *hook)
+{
+	nf_unregister_net_hook(net, &hook->ops);
+	flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
+				    FLOW_BLOCK_UNBIND);
+}
+
 static void nft_unregister_flowtable_net_hooks(struct net *net,
 					       struct nft_flowtable *flowtable)
 {
 	struct nft_hook *hook;
 
-	list_for_each_entry(hook, &flowtable->hook_list, list) {
-		nf_unregister_net_hook(net, &hook->ops);
-		flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
-					    FLOW_BLOCK_UNBIND);
-	}
+	list_for_each_entry(hook, &flowtable->hook_list, list)
+		nft_unregister_flowtable_hook(net, flowtable, hook);
 }
 
 static int nft_register_flowtable_net_hooks(struct net *net,
@@ -6030,9 +6036,7 @@ static int nft_register_flowtable_net_hooks(struct net *net,
 		if (i-- <= 0)
 			break;
 
-		nf_unregister_net_hook(net, &hook->ops);
-		flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
-					    FLOW_BLOCK_UNBIND);
+		nft_unregister_flowtable_hook(net, flowtable, hook);
 		list_del_rcu(&hook->list);
 		kfree_rcu(hook, rcu);
 	}
@@ -6139,7 +6143,7 @@ static int nf_tables_newflowtable(struct net *net, struct sock *nlsk,
 	return 0;
 err5:
 	list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
-		nf_unregister_net_hook(net, &hook->ops);
+		nft_unregister_flowtable_hook(net, flowtable, hook);
 		list_del_rcu(&hook->list);
 		kfree_rcu(hook, rcu);
 	}
@@ -6484,7 +6488,7 @@ static void nft_flowtable_event(unsigned long event, struct net_device *dev,
 		if (hook->ops.dev != dev)
 			continue;
 
-		nf_unregister_net_hook(dev_net(dev), &hook->ops);
+		nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
 		list_del_rcu(&hook->list);
 		kfree_rcu(hook, rcu);
 		break;
-- 
2.11.0

Re: [PATCH 00/18] Netfilter updates for net-next

[David Miller]

From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Mon, 18 Nov 2019 22:48:56 +0100

> The following patchset contains Netfilter updates for net-next:
 ...
> You can pull these changes from:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git

Pulled, thank you.