From: wenxu@ucloud.cn
To: pablo@netfilter.org
Cc: netfilter-devel@vger.kernel.org
Subject: [PATCH nf-next v4 3/4] netfilter: flowtable: add tunnel match offload support
Date: Tue, 14 Jan 2020 18:00:39 +0800 [thread overview]
Message-ID: <1578996040-6413-4-git-send-email-wenxu@ucloud.cn> (raw)
In-Reply-To: <1578996040-6413-1-git-send-email-wenxu@ucloud.cn>
From: wenxu <wenxu@ucloud.cn>
This patch support both ipv4 and ipv6 tunnel_id, tunnel_src and
tunnel_dst match for flowtable offload
Signed-off-by: wenxu <wenxu@ucloud.cn>
---
net/netfilter/nf_flow_table_offload.c | 67 +++++++++++++++++++++++++++++++++--
1 file changed, 65 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index b4570fc..f38378a 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -27,11 +27,17 @@ struct flow_offload_work {
struct nf_flow_key {
struct flow_dissector_key_meta meta;
struct flow_dissector_key_control control;
+ struct flow_dissector_key_control enc_control;
struct flow_dissector_key_basic basic;
union {
struct flow_dissector_key_ipv4_addrs ipv4;
struct flow_dissector_key_ipv6_addrs ipv6;
};
+ struct flow_dissector_key_keyid enc_key_id;
+ union {
+ struct flow_dissector_key_ipv4_addrs enc_ipv4;
+ struct flow_dissector_key_ipv6_addrs enc_ipv6;
+ };
struct flow_dissector_key_tcp tcp;
struct flow_dissector_key_ports tp;
} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
@@ -51,11 +57,61 @@ struct nf_flow_rule {
(__match)->dissector.offset[__type] = \
offsetof(struct nf_flow_key, __field)
+static void nf_flow_rule_lwt_match(struct nf_flow_match *match,
+ struct ip_tunnel_info *tun_info)
+{
+ struct nf_flow_key *mask = &match->mask;
+ struct nf_flow_key *key = &match->key;
+ unsigned int enc_keys;
+
+ if (!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX))
+ return;
+
+ NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_CONTROL, enc_control);
+ NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
+ key->enc_key_id.keyid = tunnel_id_to_key32(tun_info->key.tun_id);
+ mask->enc_key_id.keyid = 0xffffffff;
+ enc_keys = BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
+ BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL);
+
+ if (ip_tunnel_info_af(tun_info) == AF_INET) {
+ NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
+ enc_ipv4);
+ key->enc_ipv4.src = tun_info->key.u.ipv4.dst;
+ key->enc_ipv4.dst = tun_info->key.u.ipv4.src;
+ if (key->enc_ipv4.src)
+ mask->enc_ipv4.src = 0xffffffff;
+ if (key->enc_ipv4.dst)
+ mask->enc_ipv4.dst = 0xffffffff;
+ enc_keys |= BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS);
+ key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
+ } else {
+ memcpy(&key->enc_ipv6.src, &tun_info->key.u.ipv6.dst,
+ sizeof(struct in6_addr));
+ memcpy(&key->enc_ipv6.dst, &tun_info->key.u.ipv6.src,
+ sizeof(struct in6_addr));
+ if (memcmp(&key->enc_ipv6.src, &in6addr_any,
+ sizeof(struct in6_addr)))
+ memset(&key->enc_ipv6.src, 0xff,
+ sizeof(struct in6_addr));
+ if (memcmp(&key->enc_ipv6.dst, &in6addr_any,
+ sizeof(struct in6_addr)))
+ memset(&key->enc_ipv6.dst, 0xff,
+ sizeof(struct in6_addr));
+ enc_keys |= BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS);
+ key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
+ }
+
+ match->dissector.used_keys |= enc_keys;
+}
+
static int nf_flow_rule_match(struct nf_flow_match *match,
- const struct flow_offload_tuple *tuple)
+ const struct flow_offload_tuple *tuple,
+ struct dst_entry *other_dst)
{
struct nf_flow_key *mask = &match->mask;
struct nf_flow_key *key = &match->key;
+ struct ip_tunnel_info *tun_info;
NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_META, meta);
NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_CONTROL, control);
@@ -65,6 +121,11 @@ static int nf_flow_rule_match(struct nf_flow_match *match,
NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_TCP, tcp);
NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_PORTS, tp);
+ if (other_dst->lwtstate) {
+ tun_info = lwt_tun_info(other_dst->lwtstate);
+ nf_flow_rule_lwt_match(match, tun_info);
+ }
+
key->meta.ingress_ifindex = tuple->iifidx;
mask->meta.ingress_ifindex = 0xffffffff;
@@ -503,6 +564,7 @@ int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
const struct flow_offload *flow = offload->flow;
const struct flow_offload_tuple *tuple;
struct nf_flow_rule *flow_rule;
+ struct dst_entry *other_dst;
int err = -ENOMEM;
flow_rule = kzalloc(sizeof(*flow_rule), GFP_KERNEL);
@@ -518,7 +580,8 @@ int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
flow_rule->rule->match.key = &flow_rule->match.key;
tuple = &flow->tuplehash[dir].tuple;
- err = nf_flow_rule_match(&flow_rule->match, tuple);
+ other_dst = flow->tuplehash[!dir].tuple.dst_cache;
+ err = nf_flow_rule_match(&flow_rule->match, tuple, other_dst);
if (err < 0)
goto err_flow_match;
--
1.8.3.1
next prev parent reply other threads:[~2020-01-14 10:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-14 10:00 [PATCH nf-next v4 0/4] netfilter: flowtable: add indr-block offload wenxu
2020-01-14 10:00 ` [PATCH nf-next v4 1/4] netfilter: flowtable: add nf_flow_table_block_offload_init() wenxu
2020-01-14 10:00 ` [PATCH nf-next v4 2/4] netfilter: flowtable: add indr block setup support wenxu
2020-01-18 20:01 ` Pablo Neira Ayuso
2020-01-19 4:35 ` wenxu
2020-01-14 10:00 ` wenxu [this message]
2020-01-14 10:00 ` [PATCH nf-next v4 4/4] netfilter: flowtable: add tunnel encap/decap action offload support wenxu
2020-01-16 23:04 ` [PATCH nf-next v4 0/4] netfilter: flowtable: add indr-block offload wenxu
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