[ovs-dev] [PATCH] userspace: Enable non-bridge port as tunnel endpoint.
Yifeng Sun
pkusunyifeng at gmail.com
Tue Jul 16 17:55:08 UTC 2019
For userspace datapath, currently only the bridge itself, the LOCAL port,
can be the tunnel endpoint to encap/decap tunnel packets. This patch
enables non-bridge port as tunnel endpoint. One use case is for users to
create a bridge and a vtep port as tap, and configure underlay IP at vtep
port as the tunnel endpoint.
Signed-off-by: Yifeng Sun <pkusunyifeng at gmail.com>
Signed-off-by: William Tu <u9012063 at gmail.com>
---
ofproto/ofproto-dpif-xlate.c | 56 ++++++++++++++++++++++++++++++++++++++------
tests/tunnel-push-pop.at | 55 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 104 insertions(+), 7 deletions(-)
diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
index 73966a4e83ca..6fd9539c894b 100644
--- a/ofproto/ofproto-dpif-xlate.c
+++ b/ofproto/ofproto-dpif-xlate.c
@@ -3403,6 +3403,19 @@ tnl_route_lookup_flow(const struct xlate_ctx *ctx,
}
}
}
+
+ /* If tunnel IP isn't configured on bridges, then we search all ports. */
+ HMAP_FOR_EACH (xbridge, hmap_node, &ctx->xcfg->xbridges) {
+ struct xport *port;
+
+ HMAP_FOR_EACH (port, ofp_node, &xbridge->xports) {
+ if (!strncmp(netdev_get_name(port->netdev),
+ out_dev, IFNAMSIZ)) {
+ *out_port = port;
+ return 0;
+ }
+ }
+ }
return -ENOENT;
}
@@ -3975,10 +3988,11 @@ is_neighbor_reply_correct(const struct xlate_ctx *ctx, const struct flow *flow)
bool ret = false;
int i;
struct xbridge_addr *xbridge_addr = xbridge_addr_ref(ctx->xbridge->addr);
+ struct in6_addr *ip_addr, *mask;
/* Verify if 'nw_dst' of ARP or 'ipv6_dst' of ICMPV6 is in the list. */
for (i = 0; xbridge_addr && i < xbridge_addr->n_addr; i++) {
- struct in6_addr *ip_addr = &xbridge_addr->addr[i];
+ ip_addr = &xbridge_addr->addr[i];
if ((IN6_IS_ADDR_V4MAPPED(ip_addr) &&
flow->dl_type == htons(ETH_TYPE_ARP) &&
in6_addr_get_mapped_ipv4(ip_addr) == flow->nw_dst) ||
@@ -3991,20 +4005,48 @@ is_neighbor_reply_correct(const struct xlate_ctx *ctx, const struct flow *flow)
}
xbridge_addr_unref(xbridge_addr);
+
+ /* If not found in bridge's IPs, search in its ports. */
+ if (flow->dl_type == htons(ETH_TYPE_ARP) && !ret) {
+ struct xport *port;
+ int error, n_in6;
+ HMAP_FOR_EACH (port, ofp_node, &ctx->xbridge->xports) {
+ error = netdev_get_addr_list(port->netdev, &ip_addr,
+ &mask, &n_in6);
+ if (error) {
+ continue;
+ }
+ if (IN6_IS_ADDR_V4MAPPED(ip_addr)) {
+ ovs_be32 ip4_mask = in6_addr_get_mapped_ipv4(mask);
+ if ((flow->nw_dst & ip4_mask) ==
+ (in6_addr_get_mapped_ipv4(ip_addr) & ip4_mask)) {
+ ret = true;
+ break;
+ }
+ } else {
+ struct in6_addr masked_dst, masked_addr;
+ masked_dst = ipv6_addr_bitand(&flow->ipv6_dst, mask);
+ masked_addr = ipv6_addr_bitand(ip_addr, mask);
+ if (ipv6_addr_equals(&masked_dst, &masked_addr)) {
+ ret = true;
+ break;
+ }
+ }
+ }
+
+ }
return ret;
}
static bool
-terminate_native_tunnel(struct xlate_ctx *ctx, ofp_port_t ofp_port,
- struct flow *flow, struct flow_wildcards *wc,
- odp_port_t *tnl_port)
+terminate_native_tunnel(struct xlate_ctx *ctx, struct flow *flow,
+ struct flow_wildcards *wc, odp_port_t *tnl_port)
{
*tnl_port = ODPP_NONE;
/* XXX: Write better Filter for tunnel port. We can use in_port
* in tunnel-port flow to avoid these checks completely. */
- if (ofp_port == OFPP_LOCAL &&
- ovs_native_tunneling_is_on(ctx->xbridge->ofproto)) {
+ if (ovs_native_tunneling_is_on(ctx->xbridge->ofproto)) {
*tnl_port = tnl_port_map_lookup(flow, wc);
/* If no tunnel port was found and it's about an ARP or ICMPv6 packet,
@@ -4148,7 +4190,7 @@ compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
native_tunnel_output(ctx, xport, flow, odp_port, truncate);
flow->tunnel = flow_tnl; /* Restore tunnel metadata */
- } else if (terminate_native_tunnel(ctx, ofp_port, flow, wc,
+ } else if (terminate_native_tunnel(ctx, flow, wc,
&odp_tnl_port)) {
/* Intercept packet to be received on native tunnel port. */
nl_msg_put_odp_port(ctx->odp_actions, OVS_ACTION_ATTR_TUNNEL_POP,
diff --git a/tests/tunnel-push-pop.at b/tests/tunnel-push-pop.at
index f7172433ee63..5056b971256a 100644
--- a/tests/tunnel-push-pop.at
+++ b/tests/tunnel-push-pop.at
@@ -601,3 +601,58 @@ NXST_FLOW reply:
OVS_VSWITCHD_STOP
AT_CLEANUP
+
+AT_SETUP([tunnel_push_pop - use non-local port as tunnel endpoint])
+
+OVS_VSWITCHD_START([add-port br0 p0 -- set Interface p0 type=dummy ofport_request=1])
+AT_CHECK([ovs-vsctl add-port br0 vtep0 -- set int vtep0 type=dummy], [0])
+AT_CHECK([ovs-vsctl add-br int-br -- set bridge int-br datapath_type=dummy], [0])
+AT_CHECK([ovs-vsctl add-port int-br t1 -- set Interface t1 type=gre \
+ options:remote_ip=1.1.2.92 ofport_request=3], [0])
+
+AT_CHECK([ovs-appctl dpif/show], [0], [dnl
+dummy at ovs-dummy: hit:0 missed:0
+ br0:
+ br0 65534/100: (dummy-internal)
+ p0 1/1: (dummy)
+ vtep0 2/2: (dummy)
+ int-br:
+ int-br 65534/3: (dummy-internal)
+ t1 3/4: (gre: remote_ip=1.1.2.92)
+])
+
+AT_CHECK([ovs-appctl netdev-dummy/ip4addr vtep0 1.1.2.88/24], [0], [OK
+])
+AT_CHECK([ovs-appctl ovs/route/add 1.1.2.92/24 vtep0], [0], [OK
+])
+AT_CHECK([ovs-ofctl add-flow br0 action=normal])
+AT_CHECK([ovs-ofctl add-flow int-br action=normal])
+
+dnl Use arp request and reply to achieve tunnel next hop mac binding
+dnl By default, vtep0's MAC address is aa:55:aa:55:00:03
+AT_CHECK([ovs-appctl netdev-dummy/receive vtep0 'recirc_id(0),in_port(2),eth(dst=ff:ff:ff:ff:ff:ff,src=aa:55:aa:55:00:03),eth_type(0x0806),arp(tip=1.1.2.92,sip=1.1.2.88,op=1,sha=aa:55:aa:55:00:03,tha=00:00:00:00:00:00)'])
+AT_CHECK([ovs-appctl netdev-dummy/receive p0 'recirc_id(0),in_port(1),eth(src=f8:bc:12:44:34:b6,dst=aa:55:aa:55:00:03),eth_type(0x0806),arp(sip=1.1.2.92,tip=1.1.2.88,op=2,sha=f8:bc:12:44:34:b6,tha=aa:55:aa:55:00:03)'])
+
+AT_CHECK([ovs-appctl tnl/neigh/show | tail -n+3 | sort], [0], [dnl
+1.1.2.92 f8:bc:12:44:34:b6 br0
+])
+
+AT_CHECK([ovs-appctl ovs/route/show | tail -n+2 | sort], [0], [dnl
+User: 1.1.2.0/24 dev vtep0 SRC 1.1.2.88
+])
+
+dnl Check GRE tunnel pop
+AT_CHECK([ovs-appctl ofproto/trace ovs-dummy 'in_port(1),eth(src=f8:bc:12:44:34:b6,dst=aa:55:aa:55:00:03),eth_type(0x0800),ipv4(src=1.1.2.92,dst=1.1.2.88,proto=47,tos=0,ttl=64,frag=no)'], [0], [stdout])
+
+AT_CHECK([tail -1 stdout], [0],
+ [Datapath actions: tnl_pop(4)
+])
+
+dnl Check GRE tunnel push
+AT_CHECK([ovs-appctl ofproto/trace ovs-dummy 'in_port(3),eth(dst=f9:bc:12:44:34:b6,src=af:55:aa:55:00:03),eth_type(0x0800),ipv4(src=1.1.3.88,dst=1.1.3.92,proto=1,tos=0,ttl=64,frag=no)'], [0], [stdout])
+AT_CHECK([tail -1 stdout], [0],
+ [Datapath actions: clone(tnl_push(tnl_port(4),header(size=38,type=3,eth(dst=f8:bc:12:44:34:b6,src=aa:55:aa:55:00:03,dl_type=0x0800),ipv4(src=1.1.2.88,dst=1.1.2.92,proto=47,tos=0,ttl=64,frag=0x4000),gre((flags=0x0,proto=0x6558))),out_port(2)),1)
+])
+
+OVS_VSWITCHD_STOP
+AT_CLEANUP
--
2.7.4
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