1 /* Copyright (c) 2015 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 #include "dynamic-string.h"
20 #include "ofp-actions.h"
22 #include "openvswitch/vlog.h"
23 #include "ovn/controller/ovn-controller.h"
24 #include "ovn/lib/actions.h"
25 #include "ovn/lib/expr.h"
26 #include "ovn/lib/ovn-sb-idl.h"
29 VLOG_DEFINE_THIS_MODULE(lflow);
33 /* Contains "struct expr_symbol"s for fields supported by OVN lflows. */
34 static struct shash symtab;
41 /* Reserve a pair of registers for the logical inport and outport. A full
42 * 32-bit register each is bigger than we need, but the expression code
43 * doesn't yet support string fields that occupy less than a full OXM. */
44 expr_symtab_add_string(&symtab, "inport", MFF_LOG_INPORT, NULL);
45 expr_symtab_add_string(&symtab, "outport", MFF_LOG_OUTPORT, NULL);
47 /* Registers. We omit the registers that would otherwise overlap the
49 for (enum mf_field_id id = MFF_REG0; id < MFF_REG0 + FLOW_N_REGS; id++) {
50 if (id != MFF_LOG_INPORT && id != MFF_LOG_OUTPORT) {
53 snprintf(name, sizeof name, "reg%d", id - MFF_REG0);
54 expr_symtab_add_field(&symtab, name, id, NULL, false);
59 expr_symtab_add_field(&symtab, "eth.src", MFF_ETH_SRC, NULL, false);
60 expr_symtab_add_field(&symtab, "eth.dst", MFF_ETH_DST, NULL, false);
61 expr_symtab_add_field(&symtab, "eth.type", MFF_ETH_TYPE, NULL, true);
63 expr_symtab_add_field(&symtab, "vlan.tci", MFF_VLAN_TCI, NULL, false);
64 expr_symtab_add_predicate(&symtab, "vlan.present", "vlan.tci[12]");
65 expr_symtab_add_subfield(&symtab, "vlan.pcp", "vlan.present",
67 expr_symtab_add_subfield(&symtab, "vlan.vid", "vlan.present",
70 expr_symtab_add_predicate(&symtab, "ip4", "eth.type == 0x800");
71 expr_symtab_add_predicate(&symtab, "ip6", "eth.type == 0x86dd");
72 expr_symtab_add_predicate(&symtab, "ip", "ip4 || ip6");
73 expr_symtab_add_field(&symtab, "ip.proto", MFF_IP_PROTO, "ip", true);
74 expr_symtab_add_field(&symtab, "ip.dscp", MFF_IP_DSCP, "ip", false);
75 expr_symtab_add_field(&symtab, "ip.ecn", MFF_IP_ECN, "ip", false);
76 expr_symtab_add_field(&symtab, "ip.ttl", MFF_IP_TTL, "ip", false);
78 expr_symtab_add_field(&symtab, "ip4.src", MFF_IPV4_SRC, "ip4", false);
79 expr_symtab_add_field(&symtab, "ip4.dst", MFF_IPV4_DST, "ip4", false);
81 expr_symtab_add_predicate(&symtab, "icmp4", "ip4 && ip.proto == 1");
82 expr_symtab_add_field(&symtab, "icmp4.type", MFF_ICMPV4_TYPE, "icmp4",
84 expr_symtab_add_field(&symtab, "icmp4.code", MFF_ICMPV4_CODE, "icmp4",
87 expr_symtab_add_field(&symtab, "ip6.src", MFF_IPV6_SRC, "ip6", false);
88 expr_symtab_add_field(&symtab, "ip6.dst", MFF_IPV6_DST, "ip6", false);
89 expr_symtab_add_field(&symtab, "ip6.label", MFF_IPV6_LABEL, "ip6", false);
91 expr_symtab_add_predicate(&symtab, "icmp6", "ip6 && ip.proto == 58");
92 expr_symtab_add_field(&symtab, "icmp6.type", MFF_ICMPV6_TYPE, "icmp6",
94 expr_symtab_add_field(&symtab, "icmp6.code", MFF_ICMPV6_CODE, "icmp6",
97 expr_symtab_add_predicate(&symtab, "icmp", "icmp4 || icmp6");
99 expr_symtab_add_field(&symtab, "ip.frag", MFF_IP_FRAG, "ip", false);
100 expr_symtab_add_predicate(&symtab, "ip.is_frag", "ip.frag[0]");
101 expr_symtab_add_predicate(&symtab, "ip.later_frag", "ip.frag[1]");
102 expr_symtab_add_predicate(&symtab, "ip.first_frag",
103 "ip.is_frag && !ip.later_frag");
105 expr_symtab_add_predicate(&symtab, "arp", "eth.type == 0x806");
106 expr_symtab_add_field(&symtab, "arp.op", MFF_ARP_OP, "arp", false);
107 expr_symtab_add_field(&symtab, "arp.spa", MFF_ARP_SPA, "arp", false);
108 expr_symtab_add_field(&symtab, "arp.sha", MFF_ARP_SHA, "arp", false);
109 expr_symtab_add_field(&symtab, "arp.tpa", MFF_ARP_TPA, "arp", false);
110 expr_symtab_add_field(&symtab, "arp.tha", MFF_ARP_THA, "arp", false);
112 expr_symtab_add_predicate(&symtab, "nd",
113 "icmp6.type == {135, 136} && icmp6.code == 0");
114 expr_symtab_add_field(&symtab, "nd.target", MFF_ND_TARGET, "nd", false);
115 expr_symtab_add_field(&symtab, "nd.sll", MFF_ND_SLL,
116 "nd && icmp6.type == 135", false);
117 expr_symtab_add_field(&symtab, "nd.tll", MFF_ND_TLL,
118 "nd && icmp6.type == 136", false);
120 expr_symtab_add_predicate(&symtab, "tcp", "ip.proto == 6");
121 expr_symtab_add_field(&symtab, "tcp.src", MFF_TCP_SRC, "tcp", false);
122 expr_symtab_add_field(&symtab, "tcp.dst", MFF_TCP_DST, "tcp", false);
123 expr_symtab_add_field(&symtab, "tcp.flags", MFF_TCP_FLAGS, "tcp", false);
125 expr_symtab_add_predicate(&symtab, "udp", "ip.proto == 17");
126 expr_symtab_add_field(&symtab, "udp.src", MFF_UDP_SRC, "udp", false);
127 expr_symtab_add_field(&symtab, "udp.dst", MFF_UDP_DST, "udp", false);
129 expr_symtab_add_predicate(&symtab, "sctp", "ip.proto == 132");
130 expr_symtab_add_field(&symtab, "sctp.src", MFF_SCTP_SRC, "sctp", false);
131 expr_symtab_add_field(&symtab, "sctp.dst", MFF_SCTP_DST, "sctp", false);
134 /* Logical datapaths and logical port numbers. */
136 /* A logical datapath.
138 * 'uuid' is the UUID that represents the logical datapath in the OVN_SB
141 * 'integer' represents the logical datapath as an integer value that is unique
142 * only within the local hypervisor. Because of its size, this value is more
143 * practical for use in an OpenFlow flow table than a UUID.
145 * 'ports' maps 'logical_port' names to 'tunnel_key' values in the OVN_SB
146 * Port_Binding table within the logical datapath. */
147 struct logical_datapath {
148 struct hmap_node hmap_node; /* Indexed on 'uuid'. */
149 struct uuid uuid; /* The logical_datapath's UUID. */
150 uint32_t integer; /* Locally unique among logical datapaths. */
151 struct simap ports; /* Logical port name to port number. */
154 /* Contains "struct logical_datapath"s. */
155 static struct hmap logical_datapaths = HMAP_INITIALIZER(&logical_datapaths);
157 /* Finds and returns the logical_datapath with the given 'uuid', or NULL if
158 * no such logical_datapath exists. */
159 static struct logical_datapath *
160 ldp_lookup(const struct uuid *uuid)
162 struct logical_datapath *ldp;
163 HMAP_FOR_EACH_IN_BUCKET (ldp, hmap_node, uuid_hash(uuid),
164 &logical_datapaths) {
165 if (uuid_equals(&ldp->uuid, uuid)) {
172 /* Finds and returns the integer value corresponding to the given 'uuid', or 0
173 * if no such logical datapath exists. */
175 ldp_to_integer(const struct uuid *logical_datapath)
177 const struct logical_datapath *ldp = ldp_lookup(logical_datapath);
178 return ldp ? ldp->integer : 0;
181 /* Creates a new logical_datapath with the given 'uuid'. */
182 static struct logical_datapath *
183 ldp_create(const struct uuid *uuid)
185 static uint32_t next_integer = 1;
186 struct logical_datapath *ldp;
188 /* We don't handle the case where the logical datapaths wrap around. */
189 ovs_assert(next_integer);
191 ldp = xmalloc(sizeof *ldp);
192 hmap_insert(&logical_datapaths, &ldp->hmap_node, uuid_hash(uuid));
194 ldp->integer = next_integer++;
195 simap_init(&ldp->ports);
200 ldp_free(struct logical_datapath *ldp)
202 simap_destroy(&ldp->ports);
203 hmap_remove(&logical_datapaths, &ldp->hmap_node);
207 /* Iterates through all of the records in the Port_Binding table, updating the
208 * table of logical_datapaths to match the values found in active Bindings. */
210 ldp_run(struct controller_ctx *ctx)
212 struct logical_datapath *ldp;
213 HMAP_FOR_EACH (ldp, hmap_node, &logical_datapaths) {
214 simap_clear(&ldp->ports);
217 const struct sbrec_port_binding *binding;
218 SBREC_PORT_BINDING_FOR_EACH (binding, ctx->ovnsb_idl) {
219 struct logical_datapath *ldp;
221 ldp = ldp_lookup(&binding->logical_datapath);
223 ldp = ldp_create(&binding->logical_datapath);
226 simap_put(&ldp->ports, binding->logical_port, binding->tunnel_key);
229 struct logical_datapath *next_ldp;
230 HMAP_FOR_EACH_SAFE (ldp, next_ldp, hmap_node, &logical_datapaths) {
231 if (simap_is_empty(&ldp->ports)) {
240 struct logical_datapath *ldp, *next_ldp;
241 HMAP_FOR_EACH_SAFE (ldp, next_ldp, hmap_node, &logical_datapaths) {
252 /* Translates logical flows in the Logical_Flow table in the OVN_SB database
253 * into OpenFlow flows, adding the OpenFlow flows to 'flow_table'.
255 * We put the logical flows into OpenFlow tables 16 through 47 (inclusive). */
257 lflow_run(struct controller_ctx *ctx, struct hmap *flow_table)
259 struct hmap flows = HMAP_INITIALIZER(&flows);
260 uint32_t conj_id_ofs = 1;
264 const struct sbrec_logical_flow *lflow;
265 SBREC_LOGICAL_FLOW_FOR_EACH (lflow, ctx->ovnsb_idl) {
266 /* Find the "struct logical_datapath" asssociated with this
267 * Logical_Flow row. If there's no such struct, that must be because
268 * no logical ports are bound to that logical datapath, so there's no
269 * point in maintaining any flows for it anyway, so skip it. */
270 const struct logical_datapath *ldp;
271 ldp = ldp_lookup(&lflow->logical_datapath);
276 /* Translate OVN actions into OpenFlow actions. */
277 uint64_t ofpacts_stub[64 / 8];
278 struct ofpbuf ofpacts;
279 struct expr *prereqs;
280 uint8_t next_table_id;
283 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
284 next_table_id = lflow->table_id < 31 ? lflow->table_id + 17 : 0;
285 error = actions_parse_string(lflow->actions, &symtab, &ldp->ports,
286 next_table_id, &ofpacts, &prereqs);
288 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
289 VLOG_WARN_RL(&rl, "error parsing actions \"%s\": %s",
290 lflow->actions, error);
295 /* Translate OVN match into table of OpenFlow matches. */
299 expr = expr_parse_string(lflow->match, &symtab, &error);
302 expr = expr_combine(EXPR_T_AND, expr, prereqs);
305 expr = expr_annotate(expr, &symtab, &error);
308 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
309 VLOG_WARN_RL(&rl, "error parsing match \"%s\": %s",
310 lflow->match, error);
311 expr_destroy(prereqs);
312 ofpbuf_uninit(&ofpacts);
317 expr = expr_simplify(expr);
318 expr = expr_normalize(expr);
319 uint32_t n_conjs = expr_to_matches(expr, &ldp->ports, &matches);
322 /* Prepare the OpenFlow matches for adding to the flow table. */
323 struct expr_match *m;
324 HMAP_FOR_EACH (m, hmap_node, &matches) {
325 match_set_metadata(&m->match, htonll(ldp->integer));
326 if (m->match.wc.masks.conj_id) {
327 m->match.flow.conj_id += conj_id_ofs;
330 ofctrl_add_flow(flow_table, lflow->table_id + 16,
331 lflow->priority, &m->match, &ofpacts);
333 uint64_t conj_stubs[64 / 8];
336 ofpbuf_use_stub(&conj, conj_stubs, sizeof conj_stubs);
337 for (int i = 0; i < m->n; i++) {
338 const struct cls_conjunction *src = &m->conjunctions[i];
339 struct ofpact_conjunction *dst;
341 dst = ofpact_put_CONJUNCTION(&conj);
342 dst->id = src->id + conj_id_ofs;
343 dst->clause = src->clause;
344 dst->n_clauses = src->n_clauses;
346 ofctrl_add_flow(flow_table, lflow->table_id + 16,
347 lflow->priority, &m->match, &conj);
348 ofpbuf_uninit(&conj);
353 expr_matches_destroy(&matches);
354 ofpbuf_uninit(&ofpacts);
355 conj_id_ofs += n_conjs;
362 expr_symtab_destroy(&symtab);