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"
30 VLOG_DEFINE_THIS_MODULE(lflow);
34 /* Contains "struct expr_symbol"s for fields supported by OVN lflows. */
35 static struct shash symtab;
38 add_logical_register(struct shash *symtab, enum mf_field_id id)
42 snprintf(name, sizeof name, "reg%d", id - MFF_REG0);
43 expr_symtab_add_field(symtab, name, id, NULL, false);
51 /* Reserve a pair of registers for the logical inport and outport. A full
52 * 32-bit register each is bigger than we need, but the expression code
53 * doesn't yet support string fields that occupy less than a full OXM. */
54 expr_symtab_add_string(&symtab, "inport", MFF_LOG_INPORT, NULL);
55 expr_symtab_add_string(&symtab, "outport", MFF_LOG_OUTPORT, NULL);
57 /* Logical registers. */
58 #define MFF_LOG_REG(ID) add_logical_register(&symtab, ID);
62 /* Connection tracking state. */
63 expr_symtab_add_field(&symtab, "ct_state", MFF_CT_STATE, NULL, false);
64 char ct_state_str[16];
65 snprintf(ct_state_str, sizeof ct_state_str, "ct_state[%d]", CS_TRACKED_BIT);
66 expr_symtab_add_predicate(&symtab, "ct.trk", ct_state_str);
67 snprintf(ct_state_str, sizeof ct_state_str, "ct_state[%d]", CS_NEW_BIT);
68 expr_symtab_add_subfield(&symtab, "ct.new", "ct.trk", ct_state_str);
69 snprintf(ct_state_str, sizeof ct_state_str, "ct_state[%d]", CS_ESTABLISHED_BIT);
70 expr_symtab_add_subfield(&symtab, "ct.est", "ct.trk", ct_state_str);
71 snprintf(ct_state_str, sizeof ct_state_str, "ct_state[%d]", CS_RELATED_BIT);
72 expr_symtab_add_subfield(&symtab, "ct.rel", "ct.trk", ct_state_str);
73 snprintf(ct_state_str, sizeof ct_state_str, "ct_state[%d]", CS_REPLY_DIR_BIT);
74 expr_symtab_add_subfield(&symtab, "ct.rpl", "ct.trk", ct_state_str);
75 snprintf(ct_state_str, sizeof ct_state_str, "ct_state[%d]", CS_INVALID_BIT);
76 expr_symtab_add_subfield(&symtab, "ct.inv", "ct.trk", ct_state_str);
79 expr_symtab_add_field(&symtab, "eth.src", MFF_ETH_SRC, NULL, false);
80 expr_symtab_add_field(&symtab, "eth.dst", MFF_ETH_DST, NULL, false);
81 expr_symtab_add_field(&symtab, "eth.type", MFF_ETH_TYPE, NULL, true);
82 expr_symtab_add_predicate(&symtab, "eth.bcast",
83 "eth.dst == ff:ff:ff:ff:ff:ff");
84 expr_symtab_add_subfield(&symtab, "eth.mcast", NULL, "eth.dst[40]");
86 expr_symtab_add_field(&symtab, "vlan.tci", MFF_VLAN_TCI, NULL, false);
87 expr_symtab_add_predicate(&symtab, "vlan.present", "vlan.tci[12]");
88 expr_symtab_add_subfield(&symtab, "vlan.pcp", "vlan.present",
90 expr_symtab_add_subfield(&symtab, "vlan.vid", "vlan.present",
93 expr_symtab_add_predicate(&symtab, "ip4", "eth.type == 0x800");
94 expr_symtab_add_predicate(&symtab, "ip6", "eth.type == 0x86dd");
95 expr_symtab_add_predicate(&symtab, "ip", "ip4 || ip6");
96 expr_symtab_add_field(&symtab, "ip.proto", MFF_IP_PROTO, "ip", true);
97 expr_symtab_add_field(&symtab, "ip.dscp", MFF_IP_DSCP, "ip", false);
98 expr_symtab_add_field(&symtab, "ip.ecn", MFF_IP_ECN, "ip", false);
99 expr_symtab_add_field(&symtab, "ip.ttl", MFF_IP_TTL, "ip", false);
101 expr_symtab_add_field(&symtab, "ip4.src", MFF_IPV4_SRC, "ip4", false);
102 expr_symtab_add_field(&symtab, "ip4.dst", MFF_IPV4_DST, "ip4", false);
103 expr_symtab_add_predicate(&symtab, "ip4.mcast", "ip4.dst[28..31] == 0xe");
105 expr_symtab_add_predicate(&symtab, "icmp4", "ip4 && ip.proto == 1");
106 expr_symtab_add_field(&symtab, "icmp4.type", MFF_ICMPV4_TYPE, "icmp4",
108 expr_symtab_add_field(&symtab, "icmp4.code", MFF_ICMPV4_CODE, "icmp4",
111 expr_symtab_add_field(&symtab, "ip6.src", MFF_IPV6_SRC, "ip6", false);
112 expr_symtab_add_field(&symtab, "ip6.dst", MFF_IPV6_DST, "ip6", false);
113 expr_symtab_add_field(&symtab, "ip6.label", MFF_IPV6_LABEL, "ip6", false);
115 expr_symtab_add_predicate(&symtab, "icmp6", "ip6 && ip.proto == 58");
116 expr_symtab_add_field(&symtab, "icmp6.type", MFF_ICMPV6_TYPE, "icmp6",
118 expr_symtab_add_field(&symtab, "icmp6.code", MFF_ICMPV6_CODE, "icmp6",
121 expr_symtab_add_predicate(&symtab, "icmp", "icmp4 || icmp6");
123 expr_symtab_add_field(&symtab, "ip.frag", MFF_IP_FRAG, "ip", false);
124 expr_symtab_add_predicate(&symtab, "ip.is_frag", "ip.frag[0]");
125 expr_symtab_add_predicate(&symtab, "ip.later_frag", "ip.frag[1]");
126 expr_symtab_add_predicate(&symtab, "ip.first_frag",
127 "ip.is_frag && !ip.later_frag");
129 expr_symtab_add_predicate(&symtab, "arp", "eth.type == 0x806");
130 expr_symtab_add_field(&symtab, "arp.op", MFF_ARP_OP, "arp", false);
131 expr_symtab_add_field(&symtab, "arp.spa", MFF_ARP_SPA, "arp", false);
132 expr_symtab_add_field(&symtab, "arp.sha", MFF_ARP_SHA, "arp", false);
133 expr_symtab_add_field(&symtab, "arp.tpa", MFF_ARP_TPA, "arp", false);
134 expr_symtab_add_field(&symtab, "arp.tha", MFF_ARP_THA, "arp", false);
136 expr_symtab_add_predicate(&symtab, "nd",
137 "icmp6.type == {135, 136} && icmp6.code == 0");
138 expr_symtab_add_field(&symtab, "nd.target", MFF_ND_TARGET, "nd", false);
139 expr_symtab_add_field(&symtab, "nd.sll", MFF_ND_SLL,
140 "nd && icmp6.type == 135", false);
141 expr_symtab_add_field(&symtab, "nd.tll", MFF_ND_TLL,
142 "nd && icmp6.type == 136", false);
144 expr_symtab_add_predicate(&symtab, "tcp", "ip.proto == 6");
145 expr_symtab_add_field(&symtab, "tcp.src", MFF_TCP_SRC, "tcp", false);
146 expr_symtab_add_field(&symtab, "tcp.dst", MFF_TCP_DST, "tcp", false);
147 expr_symtab_add_field(&symtab, "tcp.flags", MFF_TCP_FLAGS, "tcp", false);
149 expr_symtab_add_predicate(&symtab, "udp", "ip.proto == 17");
150 expr_symtab_add_field(&symtab, "udp.src", MFF_UDP_SRC, "udp", false);
151 expr_symtab_add_field(&symtab, "udp.dst", MFF_UDP_DST, "udp", false);
153 expr_symtab_add_predicate(&symtab, "sctp", "ip.proto == 132");
154 expr_symtab_add_field(&symtab, "sctp.src", MFF_SCTP_SRC, "sctp", false);
155 expr_symtab_add_field(&symtab, "sctp.dst", MFF_SCTP_DST, "sctp", false);
158 /* Logical datapaths and logical port numbers. */
165 /* A logical datapath.
167 * 'ports' maps 'logical_port' names to 'tunnel_key' values in the OVN_SB
168 * Port_Binding table within the logical datapath. */
169 struct logical_datapath {
170 struct hmap_node hmap_node; /* Indexed on 'uuid'. */
171 struct uuid uuid; /* UUID from Datapath_Binding row. */
172 uint32_t tunnel_key; /* 'tunnel_key' from Datapath_Binding row. */
173 struct simap ports; /* Logical port name to port number. */
174 enum ldp_type type; /* Type of logical datapath */
177 /* Contains "struct logical_datapath"s. */
178 static struct hmap logical_datapaths = HMAP_INITIALIZER(&logical_datapaths);
180 /* Finds and returns the logical_datapath for 'binding', or NULL if no such
181 * logical_datapath exists. */
182 static struct logical_datapath *
183 ldp_lookup(const struct sbrec_datapath_binding *binding)
185 struct logical_datapath *ldp;
186 HMAP_FOR_EACH_IN_BUCKET (ldp, hmap_node, uuid_hash(&binding->header_.uuid),
187 &logical_datapaths) {
188 if (uuid_equals(&ldp->uuid, &binding->header_.uuid)) {
195 /* Creates a new logical_datapath for the given 'binding'. */
196 static struct logical_datapath *
197 ldp_create(const struct sbrec_datapath_binding *binding)
199 struct logical_datapath *ldp;
201 ldp = xmalloc(sizeof *ldp);
202 hmap_insert(&logical_datapaths, &ldp->hmap_node,
203 uuid_hash(&binding->header_.uuid));
204 ldp->uuid = binding->header_.uuid;
205 ldp->tunnel_key = binding->tunnel_key;
206 const char *ls = smap_get(&binding->external_ids, "logical-switch");
207 ldp->type = ls ? LDP_TYPE_SWITCH : LDP_TYPE_ROUTER;
208 simap_init(&ldp->ports);
212 static struct logical_datapath *
213 ldp_lookup_or_create(const struct sbrec_datapath_binding *binding)
215 struct logical_datapath *ldp = ldp_lookup(binding);
216 return ldp ? ldp : ldp_create(binding);
220 ldp_free(struct logical_datapath *ldp)
222 simap_destroy(&ldp->ports);
223 hmap_remove(&logical_datapaths, &ldp->hmap_node);
227 /* Iterates through all of the records in the Port_Binding table, updating the
228 * table of logical_datapaths to match the values found in active
231 ldp_run(struct controller_ctx *ctx)
233 struct logical_datapath *ldp;
234 HMAP_FOR_EACH (ldp, hmap_node, &logical_datapaths) {
235 simap_clear(&ldp->ports);
238 const struct sbrec_port_binding *binding;
239 SBREC_PORT_BINDING_FOR_EACH (binding, ctx->ovnsb_idl) {
240 struct logical_datapath *ldp = ldp_lookup_or_create(binding->datapath);
242 simap_put(&ldp->ports, binding->logical_port, binding->tunnel_key);
245 const struct sbrec_multicast_group *mc;
246 SBREC_MULTICAST_GROUP_FOR_EACH (mc, ctx->ovnsb_idl) {
247 struct logical_datapath *ldp = ldp_lookup_or_create(mc->datapath);
248 simap_put(&ldp->ports, mc->name, mc->tunnel_key);
251 struct logical_datapath *next_ldp;
252 HMAP_FOR_EACH_SAFE (ldp, next_ldp, hmap_node, &logical_datapaths) {
253 if (simap_is_empty(&ldp->ports)) {
262 struct logical_datapath *ldp, *next_ldp;
263 HMAP_FOR_EACH_SAFE (ldp, next_ldp, hmap_node, &logical_datapaths) {
274 /* Translates logical flows in the Logical_Flow table in the OVN_SB database
275 * into OpenFlow flows. See ovn-architecture(7) for more information. */
277 lflow_run(struct controller_ctx *ctx, struct hmap *flow_table,
278 const struct simap *ct_zones,
279 struct hmap *local_datapaths)
281 struct hmap flows = HMAP_INITIALIZER(&flows);
282 uint32_t conj_id_ofs = 1;
286 const struct sbrec_logical_flow *lflow;
287 SBREC_LOGICAL_FLOW_FOR_EACH (lflow, ctx->ovnsb_idl) {
288 /* Find the "struct logical_datapath" asssociated with this
289 * Logical_Flow row. If there's no such struct, that must be because
290 * no logical ports are bound to that logical datapath, so there's no
291 * point in maintaining any flows for it anyway, so skip it. */
292 const struct logical_datapath *ldp;
293 ldp = ldp_lookup(lflow->logical_datapath);
298 bool ingress = !strcmp(lflow->pipeline, "ingress");
300 if (ldp->type == LDP_TYPE_SWITCH && !ingress) {
301 /* For a logical switch datapath, local_datapaths tells us if there
302 * are any local ports for this datapath. If not, processing
303 * logical flows for the egress pipeline of this datapath is
306 * We still need the ingress pipeline because even if there are no
307 * local ports, we still may need to execute the ingress pipeline
308 * after a packet leaves a logical router. Further optimization
309 * is possible, but not based on what we know with local_datapaths
312 * A better approach would be a kind of "flood fill" algorithm:
314 * 1. Initialize set S to the logical datapaths that have a port
315 * located on the hypervisor.
317 * 2. For each patch port P in a logical datapath in S, add the
318 * logical datapath of the remote end of P to S. Iterate
319 * until S reaches a fixed point.
322 struct hmap_node *ld;
323 ld = hmap_first_with_hash(local_datapaths, ldp->tunnel_key);
329 /* Determine translation of logical table IDs to physical table IDs. */
330 uint8_t first_ptable = (ingress
331 ? OFTABLE_LOG_INGRESS_PIPELINE
332 : OFTABLE_LOG_EGRESS_PIPELINE);
333 uint8_t ptable = first_ptable + lflow->table_id;
334 uint8_t output_ptable = (ingress
335 ? OFTABLE_REMOTE_OUTPUT
336 : OFTABLE_LOG_TO_PHY);
338 /* Translate OVN actions into OpenFlow actions.
340 * XXX Deny changes to 'outport' in egress pipeline. */
341 uint64_t ofpacts_stub[64 / 8];
342 struct ofpbuf ofpacts;
343 struct expr *prereqs;
346 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
347 struct action_params ap = {
349 .ports = &ldp->ports,
350 .ct_zones = ct_zones,
352 .n_tables = LOG_PIPELINE_LEN,
353 .first_ptable = first_ptable,
354 .cur_ltable = lflow->table_id,
355 .output_ptable = output_ptable,
357 error = actions_parse_string(lflow->actions, &ap, &ofpacts, &prereqs);
359 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
360 VLOG_WARN_RL(&rl, "error parsing actions \"%s\": %s",
361 lflow->actions, error);
366 /* Translate OVN match into table of OpenFlow matches. */
370 expr = expr_parse_string(lflow->match, &symtab, &error);
373 expr = expr_combine(EXPR_T_AND, expr, prereqs);
376 expr = expr_annotate(expr, &symtab, &error);
379 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
380 VLOG_WARN_RL(&rl, "error parsing match \"%s\": %s",
381 lflow->match, error);
382 expr_destroy(prereqs);
383 ofpbuf_uninit(&ofpacts);
388 expr = expr_simplify(expr);
389 expr = expr_normalize(expr);
390 uint32_t n_conjs = expr_to_matches(expr, &ldp->ports, &matches);
393 /* Prepare the OpenFlow matches for adding to the flow table. */
394 struct expr_match *m;
395 HMAP_FOR_EACH (m, hmap_node, &matches) {
396 match_set_metadata(&m->match, htonll(ldp->tunnel_key));
397 if (m->match.wc.masks.conj_id) {
398 m->match.flow.conj_id += conj_id_ofs;
401 ofctrl_add_flow(flow_table, ptable, lflow->priority,
402 &m->match, &ofpacts);
404 uint64_t conj_stubs[64 / 8];
407 ofpbuf_use_stub(&conj, conj_stubs, sizeof conj_stubs);
408 for (int i = 0; i < m->n; i++) {
409 const struct cls_conjunction *src = &m->conjunctions[i];
410 struct ofpact_conjunction *dst;
412 dst = ofpact_put_CONJUNCTION(&conj);
413 dst->id = src->id + conj_id_ofs;
414 dst->clause = src->clause;
415 dst->n_clauses = src->n_clauses;
417 ofctrl_add_flow(flow_table, ptable, lflow->priority,
419 ofpbuf_uninit(&conj);
424 expr_matches_destroy(&matches);
425 ofpbuf_uninit(&ofpacts);
426 conj_id_ofs += n_conjs;
433 expr_symtab_destroy(&symtab);