2 * Copyright (c) 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
21 #include "classifier.h"
22 #include "dynamic-string.h"
25 #include "ovs-thread.h"
27 #include "tnl-arp-cache.h"
28 #include "tnl-ports.h"
32 static struct classifier cls; /* Tunnel ports. */
37 struct ovs_refcount ref_cnt;
38 char dev_name[IFNAMSIZ];
41 static struct tnl_port_in *
42 tnl_port_cast(const struct cls_rule *cr)
44 BUILD_ASSERT_DECL(offsetof(struct tnl_port_in, cr) == 0);
46 return CONTAINER_OF(cr, struct tnl_port_in, cr);
50 tnl_port_free(struct tnl_port_in *p)
52 cls_rule_destroy(&p->cr);
57 tnl_port_init_flow(struct flow *flow, ovs_be32 ip_dst, ovs_be16 udp_port)
59 memset(flow, 0, sizeof *flow);
60 flow->dl_type = htons(ETH_TYPE_IP);
62 flow->nw_proto = IPPROTO_UDP;
64 flow->nw_proto = IPPROTO_GRE;
66 flow->tp_dst = udp_port;
67 /* When matching on incoming flow from remove tnl end point,
68 * our dst ip address is source ip for them. */
69 flow->nw_src = ip_dst;
73 tnl_port_map_insert(odp_port_t port, ovs_be32 ip_dst, ovs_be16 udp_port,
74 const char dev_name[])
76 const struct cls_rule *cr;
77 struct tnl_port_in *p;
80 memset(&match, 0, sizeof match);
81 tnl_port_init_flow(&match.flow, ip_dst, udp_port);
84 cr = classifier_lookup(&cls, &match.flow, NULL);
85 p = tnl_port_cast(cr);
86 /* Try again if the rule was released before we get the reference. */
87 } while (p && !ovs_refcount_try_ref_rcu(&p->ref_cnt));
90 return; /* Added refcount of an existing port. */
93 p = xzalloc(sizeof *p);
96 match.wc.masks.dl_type = OVS_BE16_MAX;
97 match.wc.masks.nw_proto = 0xff;
98 match.wc.masks.nw_frag = 0xff; /* XXX: No fragments support. */
99 match.wc.masks.tp_dst = OVS_BE16_MAX;
100 match.wc.masks.nw_src = OVS_BE32_MAX;
102 cls_rule_init(&p->cr, &match, 0); /* Priority == 0. */
103 ovs_refcount_init(&p->ref_cnt);
104 strncpy(p->dev_name, dev_name, IFNAMSIZ);
106 classifier_insert(&cls, &p->cr);
110 tnl_port_unref(const struct cls_rule *cr)
112 struct tnl_port_in *p = tnl_port_cast(cr);
114 if (cr && ovs_refcount_unref_relaxed(&p->ref_cnt) == 1) {
115 if (classifier_remove(&cls, cr)) {
116 ovsrcu_postpone(tnl_port_free, p);
122 tnl_port_map_delete(ovs_be32 ip_dst, ovs_be16 udp_port)
124 const struct cls_rule *cr;
127 tnl_port_init_flow(&flow, ip_dst, udp_port);
129 cr = classifier_lookup(&cls, &flow, NULL);
134 tnl_port_map_lookup(const struct flow *flow, struct flow_wildcards *wc)
136 const struct cls_rule *cr = classifier_lookup(&cls, flow, wc);
138 return (cr) ? tnl_port_cast(cr)->portno : ODPP_NONE;
142 tnl_port_show(struct unixctl_conn *conn, int argc OVS_UNUSED,
143 const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
145 struct ds ds = DS_EMPTY_INITIALIZER;
146 const struct tnl_port_in *p;
148 ds_put_format(&ds, "Listening ports:\n");
149 CLS_FOR_EACH(p, cr, &cls) {
150 struct odputil_keybuf keybuf;
151 struct odputil_keybuf maskbuf;
153 const struct nlattr *key, *mask;
154 size_t key_len, mask_len;
155 struct flow_wildcards wc;
158 ds_put_format(&ds, "%s (%"PRIu32") : ", p->dev_name, p->portno);
159 minimask_expand(&p->cr.match.mask, &wc);
160 miniflow_expand(&p->cr.match.flow, &flow);
163 ofpbuf_use_stack(&buf, &keybuf, sizeof keybuf);
164 odp_flow_key_from_flow(&buf, &flow, &wc.masks,
165 flow.in_port.odp_port, true);
166 key = ofpbuf_data(&buf);
167 key_len = ofpbuf_size(&buf);
169 ofpbuf_use_stack(&buf, &maskbuf, sizeof maskbuf);
170 odp_flow_key_from_mask(&buf, &wc.masks, &flow,
171 odp_to_u32(wc.masks.in_port.odp_port),
173 mask = ofpbuf_data(&buf);
174 mask_len = ofpbuf_size(&buf);
177 odp_flow_format(key, key_len, mask, mask_len, NULL, &ds, false);
178 ds_put_format(&ds, "\n");
180 unixctl_command_reply(conn, ds_cstr(&ds));
185 tnl_port_map_init(void)
187 classifier_init(&cls, flow_segment_u32s);
188 unixctl_command_register("tnl/ports/show", "", 0, 0, tnl_port_show, NULL);