2 * Copyright (c) 2014, 2015 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"
29 #include "ovs-thread.h"
33 static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
34 static struct classifier cls; /* Tunnel ports. */
39 struct ovs_refcount ref_cnt;
40 char dev_name[IFNAMSIZ];
43 static struct tnl_port_in *
44 tnl_port_cast(const struct cls_rule *cr)
46 BUILD_ASSERT_DECL(offsetof(struct tnl_port_in, cr) == 0);
48 return CONTAINER_OF(cr, struct tnl_port_in, cr);
52 tnl_port_free(struct tnl_port_in *p)
54 cls_rule_destroy(&p->cr);
59 tnl_port_init_flow(struct flow *flow, ovs_be32 ip_dst, ovs_be16 udp_port)
61 memset(flow, 0, sizeof *flow);
62 flow->dl_type = htons(ETH_TYPE_IP);
64 flow->nw_proto = IPPROTO_UDP;
66 flow->nw_proto = IPPROTO_GRE;
68 flow->tp_dst = udp_port;
69 /* When matching on incoming flow from remove tnl end point,
70 * our dst ip address is source ip for them. */
71 flow->nw_src = ip_dst;
75 tnl_port_map_insert(odp_port_t port, ovs_be32 ip_dst, ovs_be16 udp_port,
76 const char dev_name[])
78 const struct cls_rule *cr;
79 struct tnl_port_in *p;
82 memset(&match, 0, sizeof match);
83 tnl_port_init_flow(&match.flow, ip_dst, udp_port);
85 ovs_mutex_lock(&mutex);
87 cr = classifier_lookup(&cls, &match.flow, NULL);
88 p = tnl_port_cast(cr);
89 /* Try again if the rule was released before we get the reference. */
90 } while (p && !ovs_refcount_try_ref_rcu(&p->ref_cnt));
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 ovs_strlcpy(p->dev_name, dev_name, sizeof p->dev_name);
106 classifier_insert(&cls, &p->cr, NULL, 0);
108 ovs_mutex_unlock(&mutex);
112 tnl_port_unref(const struct cls_rule *cr)
114 struct tnl_port_in *p = tnl_port_cast(cr);
116 if (cr && ovs_refcount_unref_relaxed(&p->ref_cnt) == 1) {
117 ovs_mutex_lock(&mutex);
118 if (classifier_remove(&cls, cr)) {
119 ovsrcu_postpone(tnl_port_free, p);
121 ovs_mutex_unlock(&mutex);
126 tnl_port_map_delete(ovs_be32 ip_dst, ovs_be16 udp_port)
128 const struct cls_rule *cr;
131 tnl_port_init_flow(&flow, ip_dst, udp_port);
133 cr = classifier_lookup(&cls, &flow, NULL);
137 /* 'flow' is non-const to allow for temporary modifications during the lookup.
138 * Any changes are restored before returning. */
140 tnl_port_map_lookup(struct flow *flow, struct flow_wildcards *wc)
142 const struct cls_rule *cr = classifier_lookup(&cls, flow, wc);
144 return (cr) ? tnl_port_cast(cr)->portno : ODPP_NONE;
148 tnl_port_show(struct unixctl_conn *conn, int argc OVS_UNUSED,
149 const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
151 struct ds ds = DS_EMPTY_INITIALIZER;
152 const struct tnl_port_in *p;
154 ds_put_format(&ds, "Listening ports:\n");
155 CLS_FOR_EACH(p, cr, &cls) {
156 struct odputil_keybuf keybuf;
157 struct odputil_keybuf maskbuf;
159 const struct nlattr *key, *mask;
160 size_t key_len, mask_len;
161 struct flow_wildcards wc;
164 ds_put_format(&ds, "%s (%"PRIu32") : ", p->dev_name, p->portno);
165 minimask_expand(&p->cr.match.mask, &wc);
166 miniflow_expand(&p->cr.match.flow, &flow);
169 ofpbuf_use_stack(&buf, &keybuf, sizeof keybuf);
170 odp_flow_key_from_flow(&buf, &flow, &wc.masks,
171 flow.in_port.odp_port, true);
175 ofpbuf_use_stack(&buf, &maskbuf, sizeof maskbuf);
176 odp_flow_key_from_mask(&buf, &wc.masks, &flow,
177 odp_to_u32(wc.masks.in_port.odp_port),
183 odp_flow_format(key, key_len, mask, mask_len, NULL, &ds, false);
184 ds_put_format(&ds, "\n");
186 unixctl_command_reply(conn, ds_cstr(&ds));
191 tnl_port_map_init(void)
193 classifier_init(&cls, flow_segment_u64s);
194 unixctl_command_register("tnl/ports/show", "", 0, 0, tnl_port_show, NULL);