-/* SAMPLE action for sFlow must be first action in any given list of
- * actions. At this point we do not have all information required to
- * build it. So try to build sample action as complete as possible. */
-static void
-add_sflow_action(struct action_xlate_ctx *ctx)
-{
- ctx->user_cookie_offset = compose_sflow_action(ctx->ofproto,
- ctx->odp_actions,
- &ctx->flow, OVSP_NONE);
- ctx->sflow_odp_port = 0;
- ctx->sflow_n_outputs = 0;
-}
-
-/* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
- * of actions, eventually after the SAMPLE action for sFlow. */
-static void
-add_ipfix_action(struct action_xlate_ctx *ctx)
-{
- compose_ipfix_action(ctx->ofproto, ctx->odp_actions, &ctx->flow);
-}
-
-/* Fix SAMPLE action according to data collected while composing ODP actions.
- * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
- * USERSPACE action's user-cookie which is required for sflow. */
-static void
-fix_sflow_action(struct action_xlate_ctx *ctx)
-{
- const struct flow *base = &ctx->base_flow;
- union user_action_cookie *cookie;
-
- if (!ctx->user_cookie_offset) {
- return;
- }
-
- cookie = ofpbuf_at(ctx->odp_actions, ctx->user_cookie_offset,
- sizeof cookie->sflow);
- ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
-
- compose_sflow_cookie(ctx->ofproto, base->vlan_tci,
- ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
-}
-
-static void
-compose_output_action__(struct action_xlate_ctx *ctx, uint16_t ofp_port,
- bool check_stp)
-{
- const struct ofport_dpif *ofport = get_ofp_port(ctx->ofproto, ofp_port);
- ovs_be16 flow_vlan_tci;
- uint32_t flow_skb_mark;
- uint8_t flow_nw_tos;
- struct priority_to_dscp *pdscp;
- uint32_t out_port, odp_port;
-
- /* If 'struct flow' gets additional metadata, we'll need to zero it out
- * before traversing a patch port. */
- BUILD_ASSERT_DECL(FLOW_WC_SEQ == 20);
-
- if (!ofport) {
- xlate_report(ctx, "Nonexistent output port");
- return;
- } else if (ofport->up.pp.config & OFPUTIL_PC_NO_FWD) {
- xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
- return;
- } else if (check_stp && !stp_forward_in_state(ofport->stp_state)) {
- xlate_report(ctx, "STP not in forwarding state, skipping output");
- return;
- }
-
- if (netdev_vport_is_patch(ofport->up.netdev)) {
- struct ofport_dpif *peer = ofport_get_peer(ofport);
- struct flow old_flow = ctx->flow;
- const struct ofproto_dpif *peer_ofproto;
- enum slow_path_reason special;
- struct ofport_dpif *in_port;
-
- if (!peer) {
- xlate_report(ctx, "Nonexistent patch port peer");
- return;
- }
-
- peer_ofproto = ofproto_dpif_cast(peer->up.ofproto);
- if (peer_ofproto->backer != ctx->ofproto->backer) {
- xlate_report(ctx, "Patch port peer on a different datapath");
- return;
- }
-
- ctx->ofproto = ofproto_dpif_cast(peer->up.ofproto);
- ctx->flow.in_port = peer->up.ofp_port;
- ctx->flow.metadata = htonll(0);
- memset(&ctx->flow.tunnel, 0, sizeof ctx->flow.tunnel);
- memset(ctx->flow.regs, 0, sizeof ctx->flow.regs);
-
- in_port = get_ofp_port(ctx->ofproto, ctx->flow.in_port);
- special = process_special(ctx->ofproto, &ctx->flow, in_port,
- ctx->packet);
- if (special) {
- ctx->slow |= special;
- } else if (!in_port || may_receive(in_port, ctx)) {
- if (!in_port || stp_forward_in_state(in_port->stp_state)) {
- xlate_table_action(ctx, ctx->flow.in_port, 0, true);
- } else {
- /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
- * learning action look at the packet, then drop it. */
- struct flow old_base_flow = ctx->base_flow;
- size_t old_size = ctx->odp_actions->size;
- xlate_table_action(ctx, ctx->flow.in_port, 0, true);
- ctx->base_flow = old_base_flow;
- ctx->odp_actions->size = old_size;
- }
- }
-
- ctx->flow = old_flow;
- ctx->ofproto = ofproto_dpif_cast(ofport->up.ofproto);
-
- if (ctx->resubmit_stats) {
- netdev_vport_inc_tx(ofport->up.netdev, ctx->resubmit_stats);
- netdev_vport_inc_rx(peer->up.netdev, ctx->resubmit_stats);
- }
-
- return;
- }
-
- flow_vlan_tci = ctx->flow.vlan_tci;
- flow_skb_mark = ctx->flow.skb_mark;
- flow_nw_tos = ctx->flow.nw_tos;
-
- pdscp = get_priority(ofport, ctx->flow.skb_priority);
- if (pdscp) {
- ctx->flow.nw_tos &= ~IP_DSCP_MASK;
- ctx->flow.nw_tos |= pdscp->dscp;
- }
-
- if (ofport->tnl_port) {
- /* Save tunnel metadata so that changes made due to
- * the Logical (tunnel) Port are not visible for any further
- * matches, while explicit set actions on tunnel metadata are.
- */
- struct flow_tnl flow_tnl = ctx->flow.tunnel;
- odp_port = tnl_port_send(ofport->tnl_port, &ctx->flow);
- if (odp_port == OVSP_NONE) {
- xlate_report(ctx, "Tunneling decided against output");
- goto out; /* restore flow_nw_tos */
- }
-
- if (ctx->resubmit_stats) {
- netdev_vport_inc_tx(ofport->up.netdev, ctx->resubmit_stats);
- }
- out_port = odp_port;
- commit_odp_tunnel_action(&ctx->flow, &ctx->base_flow,
- ctx->odp_actions);
- ctx->flow.tunnel = flow_tnl; /* Restore tunnel metadata */
- } else {
- odp_port = ofport->odp_port;
- out_port = vsp_realdev_to_vlandev(ctx->ofproto, odp_port,
- ctx->flow.vlan_tci);
- if (out_port != odp_port) {
- ctx->flow.vlan_tci = htons(0);
- }
- ctx->flow.skb_mark &= ~IPSEC_MARK;
- }
- commit_odp_actions(&ctx->flow, &ctx->base_flow, ctx->odp_actions);
- nl_msg_put_u32(ctx->odp_actions, OVS_ACTION_ATTR_OUTPUT, out_port);
-
- ctx->sflow_odp_port = odp_port;
- ctx->sflow_n_outputs++;
- ctx->nf_output_iface = ofp_port;
-
- /* Restore flow */
- ctx->flow.vlan_tci = flow_vlan_tci;
- ctx->flow.skb_mark = flow_skb_mark;
- out:
- ctx->flow.nw_tos = flow_nw_tos;
-}
-
-static void
-compose_output_action(struct action_xlate_ctx *ctx, uint16_t ofp_port)
-{
- compose_output_action__(ctx, ofp_port, true);
-}
-
-static void
-tag_the_flow(struct action_xlate_ctx *ctx, struct rule_dpif *rule)
-{
- struct ofproto_dpif *ofproto = ctx->ofproto;
- uint8_t table_id = ctx->table_id;
-
- if (table_id > 0 && table_id < N_TABLES) {
- struct table_dpif *table = &ofproto->tables[table_id];
- if (table->other_table) {
- ctx->tags |= (rule && rule->tag
- ? rule->tag
- : rule_calculate_tag(&ctx->flow,
- &table->other_table->mask,
- table->basis));
- }
- }
-}
-
-/* Common rule processing in one place to avoid duplicating code. */
-static struct rule_dpif *
-ctx_rule_hooks(struct action_xlate_ctx *ctx, struct rule_dpif *rule,
- bool may_packet_in)
-{
- if (ctx->resubmit_hook) {
- ctx->resubmit_hook(ctx, rule);
- }
- if (rule == NULL && may_packet_in) {
- /* XXX
- * check if table configuration flags
- * OFPTC_TABLE_MISS_CONTROLLER, default.
- * OFPTC_TABLE_MISS_CONTINUE,
- * OFPTC_TABLE_MISS_DROP
- * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do?
- */
- rule = rule_dpif_miss_rule(ctx->ofproto, &ctx->flow);
- }
- if (rule && ctx->resubmit_stats) {
- rule_credit_stats(rule, ctx->resubmit_stats);
- }
- return rule;
-}
-
-static void
-xlate_table_action(struct action_xlate_ctx *ctx,
- uint16_t in_port, uint8_t table_id, bool may_packet_in)
-{
- if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
- struct rule_dpif *rule;
- uint16_t old_in_port = ctx->flow.in_port;
- uint8_t old_table_id = ctx->table_id;
-
- ctx->table_id = table_id;
-
- /* Look up a flow with 'in_port' as the input port. */
- ctx->flow.in_port = in_port;
- rule = rule_dpif_lookup__(ctx->ofproto, &ctx->flow, table_id);
-
- tag_the_flow(ctx, rule);
-
- /* Restore the original input port. Otherwise OFPP_NORMAL and
- * OFPP_IN_PORT will have surprising behavior. */
- ctx->flow.in_port = old_in_port;
-
- rule = ctx_rule_hooks(ctx, rule, may_packet_in);
-
- if (rule) {
- struct rule_dpif *old_rule = ctx->rule;
-
- ctx->recurse++;
- ctx->rule = rule;
- do_xlate_actions(rule->up.ofpacts, rule->up.ofpacts_len, ctx);
- ctx->rule = old_rule;
- ctx->recurse--;
- }
-
- ctx->table_id = old_table_id;
- } else {
- static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
-
- VLOG_ERR_RL(&recurse_rl, "resubmit actions recursed over %d times",
- MAX_RESUBMIT_RECURSION);
- ctx->max_resubmit_trigger = true;
- }
-}
-
-static void
-xlate_ofpact_resubmit(struct action_xlate_ctx *ctx,
- const struct ofpact_resubmit *resubmit)
-{
- uint16_t in_port;
- uint8_t table_id;
-
- in_port = resubmit->in_port;
- if (in_port == OFPP_IN_PORT) {
- in_port = ctx->flow.in_port;
- }
-
- table_id = resubmit->table_id;
- if (table_id == 255) {
- table_id = ctx->table_id;
- }
-
- xlate_table_action(ctx, in_port, table_id, false);
-}
-
-static void
-flood_packets(struct action_xlate_ctx *ctx, bool all)
-{
- struct ofport_dpif *ofport;
-
- HMAP_FOR_EACH (ofport, up.hmap_node, &ctx->ofproto->up.ports) {
- uint16_t ofp_port = ofport->up.ofp_port;
-
- if (ofp_port == ctx->flow.in_port) {
- continue;
- }
-
- if (all) {
- compose_output_action__(ctx, ofp_port, false);
- } else if (!(ofport->up.pp.config & OFPUTIL_PC_NO_FLOOD)) {
- compose_output_action(ctx, ofp_port);
- }
- }
-
- ctx->nf_output_iface = NF_OUT_FLOOD;
-}
-
-static void
-execute_controller_action(struct action_xlate_ctx *ctx, int len,
- enum ofp_packet_in_reason reason,
- uint16_t controller_id)
-{
- struct ofputil_packet_in pin;
- struct ofpbuf *packet;
-
- ctx->slow |= SLOW_CONTROLLER;
- if (!ctx->packet) {
- return;
- }
-
- packet = ofpbuf_clone(ctx->packet);
-
- if (packet->l2 && packet->l3) {
- struct eth_header *eh;
- uint16_t mpls_depth;
-
- eth_pop_vlan(packet);
- eh = packet->l2;
-
- memcpy(eh->eth_src, ctx->flow.dl_src, sizeof eh->eth_src);
- memcpy(eh->eth_dst, ctx->flow.dl_dst, sizeof eh->eth_dst);
-
- if (ctx->flow.vlan_tci & htons(VLAN_CFI)) {
- eth_push_vlan(packet, ctx->flow.vlan_tci);
- }
-
- mpls_depth = eth_mpls_depth(packet);
-
- if (mpls_depth < ctx->flow.mpls_depth) {
- push_mpls(packet, ctx->flow.dl_type, ctx->flow.mpls_lse);
- } else if (mpls_depth > ctx->flow.mpls_depth) {
- pop_mpls(packet, ctx->flow.dl_type);
- } else if (mpls_depth) {
- set_mpls_lse(packet, ctx->flow.mpls_lse);
- }
-
- if (packet->l4) {
- if (ctx->flow.dl_type == htons(ETH_TYPE_IP)) {
- packet_set_ipv4(packet, ctx->flow.nw_src, ctx->flow.nw_dst,
- ctx->flow.nw_tos, ctx->flow.nw_ttl);
- }
-
- if (packet->l7) {
- if (ctx->flow.nw_proto == IPPROTO_TCP) {
- packet_set_tcp_port(packet, ctx->flow.tp_src,
- ctx->flow.tp_dst);
- } else if (ctx->flow.nw_proto == IPPROTO_UDP) {
- packet_set_udp_port(packet, ctx->flow.tp_src,
- ctx->flow.tp_dst);
- }
- }
- }
- }
-
- pin.packet = packet->data;
- pin.packet_len = packet->size;
- pin.reason = reason;
- pin.controller_id = controller_id;
- pin.table_id = ctx->table_id;
- pin.cookie = ctx->rule ? ctx->rule->up.flow_cookie : 0;
-
- pin.send_len = len;
- flow_get_metadata(&ctx->flow, &pin.fmd);
-
- connmgr_send_packet_in(ctx->ofproto->up.connmgr, &pin);
- ofpbuf_delete(packet);
-}
-
-static void
-execute_mpls_push_action(struct action_xlate_ctx *ctx, ovs_be16 eth_type)
-{
- ovs_assert(eth_type_mpls(eth_type));
-
- if (ctx->base_flow.mpls_depth) {
- ctx->flow.mpls_lse &= ~htonl(MPLS_BOS_MASK);
- ctx->flow.mpls_depth++;
- } else {
- ovs_be32 label;
- uint8_t tc, ttl;
-
- if (ctx->flow.dl_type == htons(ETH_TYPE_IPV6)) {
- label = htonl(0x2); /* IPV6 Explicit Null. */
- } else {
- label = htonl(0x0); /* IPV4 Explicit Null. */
- }
- tc = (ctx->flow.nw_tos & IP_DSCP_MASK) >> 2;
- ttl = ctx->flow.nw_ttl ? ctx->flow.nw_ttl : 0x40;
- ctx->flow.mpls_lse = set_mpls_lse_values(ttl, tc, 1, label);
- ctx->flow.mpls_depth = 1;
- }
- ctx->flow.dl_type = eth_type;
-}
-
-static void
-execute_mpls_pop_action(struct action_xlate_ctx *ctx, ovs_be16 eth_type)
-{
- ovs_assert(eth_type_mpls(ctx->flow.dl_type));
- ovs_assert(!eth_type_mpls(eth_type));
-
- if (ctx->flow.mpls_depth) {
- ctx->flow.mpls_depth--;
- ctx->flow.mpls_lse = htonl(0);
- if (!ctx->flow.mpls_depth) {
- ctx->flow.dl_type = eth_type;
- }
- }
-}
-
-static bool
-compose_dec_ttl(struct action_xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
-{
- if (ctx->flow.dl_type != htons(ETH_TYPE_IP) &&
- ctx->flow.dl_type != htons(ETH_TYPE_IPV6)) {
- return false;
- }
-
- if (ctx->flow.nw_ttl > 1) {
- ctx->flow.nw_ttl--;
- return false;
- } else {
- size_t i;
-
- for (i = 0; i < ids->n_controllers; i++) {
- execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
- ids->cnt_ids[i]);
- }
-
- /* Stop processing for current table. */
- return true;
- }
-}
-
-static bool
-execute_set_mpls_ttl_action(struct action_xlate_ctx *ctx, uint8_t ttl)
-{
- if (!eth_type_mpls(ctx->flow.dl_type)) {
- return true;
- }
-
- set_mpls_lse_ttl(&ctx->flow.mpls_lse, ttl);
- return false;
-}
-
-static bool
-execute_dec_mpls_ttl_action(struct action_xlate_ctx *ctx)
-{
- uint8_t ttl = mpls_lse_to_ttl(ctx->flow.mpls_lse);
-
- if (!eth_type_mpls(ctx->flow.dl_type)) {
- return false;
- }
-
- if (ttl > 1) {
- ttl--;
- set_mpls_lse_ttl(&ctx->flow.mpls_lse, ttl);
- return false;
- } else {
- execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
-
- /* Stop processing for current table. */
- return true;
- }
-}
-
-static void
-xlate_output_action(struct action_xlate_ctx *ctx,
- uint16_t port, uint16_t max_len, bool may_packet_in)
-{
- uint16_t prev_nf_output_iface = ctx->nf_output_iface;
-
- ctx->nf_output_iface = NF_OUT_DROP;
-
- switch (port) {
- case OFPP_IN_PORT:
- compose_output_action(ctx, ctx->flow.in_port);
- break;
- case OFPP_TABLE:
- xlate_table_action(ctx, ctx->flow.in_port, 0, may_packet_in);
- break;
- case OFPP_NORMAL:
- xlate_normal(ctx);
- break;
- case OFPP_FLOOD:
- flood_packets(ctx, false);
- break;
- case OFPP_ALL:
- flood_packets(ctx, true);
- break;
- case OFPP_CONTROLLER:
- execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
- break;
- case OFPP_NONE:
- break;
- case OFPP_LOCAL:
- default:
- if (port != ctx->flow.in_port) {
- compose_output_action(ctx, port);
- } else {
- xlate_report(ctx, "skipping output to input port");
- }
- break;
- }
-
- if (prev_nf_output_iface == NF_OUT_FLOOD) {
- ctx->nf_output_iface = NF_OUT_FLOOD;
- } else if (ctx->nf_output_iface == NF_OUT_DROP) {
- ctx->nf_output_iface = prev_nf_output_iface;
- } else if (prev_nf_output_iface != NF_OUT_DROP &&
- ctx->nf_output_iface != NF_OUT_FLOOD) {
- ctx->nf_output_iface = NF_OUT_MULTI;
- }
-}
-
-static void
-xlate_output_reg_action(struct action_xlate_ctx *ctx,
- const struct ofpact_output_reg *or)
-{
- uint64_t port = mf_get_subfield(&or->src, &ctx->flow);
- if (port <= UINT16_MAX) {
- xlate_output_action(ctx, port, or->max_len, false);
- }
-}
-
-static void
-xlate_enqueue_action(struct action_xlate_ctx *ctx,
- const struct ofpact_enqueue *enqueue)
-{
- uint16_t ofp_port = enqueue->port;
- uint32_t queue_id = enqueue->queue;
- uint32_t flow_priority, priority;
- int error;
-
- /* Translate queue to priority. */
- error = dpif_queue_to_priority(ctx->ofproto->backer->dpif,
- queue_id, &priority);
- if (error) {
- /* Fall back to ordinary output action. */
- xlate_output_action(ctx, enqueue->port, 0, false);
- return;
- }
-
- /* Check output port. */
- if (ofp_port == OFPP_IN_PORT) {
- ofp_port = ctx->flow.in_port;
- } else if (ofp_port == ctx->flow.in_port) {
- return;
- }
-
- /* Add datapath actions. */
- flow_priority = ctx->flow.skb_priority;
- ctx->flow.skb_priority = priority;
- compose_output_action(ctx, ofp_port);
- ctx->flow.skb_priority = flow_priority;
-
- /* Update NetFlow output port. */
- if (ctx->nf_output_iface == NF_OUT_DROP) {
- ctx->nf_output_iface = ofp_port;
- } else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
- ctx->nf_output_iface = NF_OUT_MULTI;
- }
-}
-
-static void
-xlate_set_queue_action(struct action_xlate_ctx *ctx, uint32_t queue_id)
-{
- uint32_t skb_priority;
-
- if (!dpif_queue_to_priority(ctx->ofproto->backer->dpif,
- queue_id, &skb_priority)) {
- ctx->flow.skb_priority = skb_priority;
- } else {
- /* Couldn't translate queue to a priority. Nothing to do. A warning
- * has already been logged. */
- }
-}
-
-static bool
-slave_enabled_cb(uint16_t ofp_port, void *ofproto_)
-{
- struct ofproto_dpif *ofproto = ofproto_;
- struct ofport_dpif *port;
-
- switch (ofp_port) {
- case OFPP_IN_PORT:
- case OFPP_TABLE:
- case OFPP_NORMAL:
- case OFPP_FLOOD:
- case OFPP_ALL:
- case OFPP_NONE:
- return true;
- case OFPP_CONTROLLER: /* Not supported by the bundle action. */
- return false;
- default:
- port = get_ofp_port(ofproto, ofp_port);
- return port ? port->may_enable : false;
- }
-}
-
-static void
-xlate_bundle_action(struct action_xlate_ctx *ctx,
- const struct ofpact_bundle *bundle)
-{
- uint16_t port;
-
- port = bundle_execute(bundle, &ctx->flow, slave_enabled_cb, ctx->ofproto);
- if (bundle->dst.field) {
- nxm_reg_load(&bundle->dst, port, &ctx->flow);
- } else {
- xlate_output_action(ctx, port, 0, false);
- }
-}
-
-static void
-xlate_learn_action(struct action_xlate_ctx *ctx,
- const struct ofpact_learn *learn)
-{
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
- struct ofputil_flow_mod fm;
- uint64_t ofpacts_stub[1024 / 8];
- struct ofpbuf ofpacts;
- int error;
-
- ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
- learn_execute(learn, &ctx->flow, &fm, &ofpacts);
-
- error = ofproto_flow_mod(&ctx->ofproto->up, &fm);
- if (error && !VLOG_DROP_WARN(&rl)) {
- VLOG_WARN("learning action failed to modify flow table (%s)",
- ofperr_get_name(error));
- }
-
- ofpbuf_uninit(&ofpacts);
-}
-
-/* Reduces '*timeout' to no more than 'max'. A value of zero in either case
- * means "infinite". */
-static void
-reduce_timeout(uint16_t max, uint16_t *timeout)
-{
- if (max && (!*timeout || *timeout > max)) {
- *timeout = max;
- }
-}
-
-static void
-xlate_fin_timeout(struct action_xlate_ctx *ctx,
- const struct ofpact_fin_timeout *oft)
-{
- if (ctx->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) {
- struct rule_dpif *rule = ctx->rule;
-
- reduce_timeout(oft->fin_idle_timeout, &rule->up.idle_timeout);
- reduce_timeout(oft->fin_hard_timeout, &rule->up.hard_timeout);
- }
-}
-
-static void
-xlate_sample_action(struct action_xlate_ctx *ctx,
- const struct ofpact_sample *os)
-{
- union user_action_cookie cookie;
- /* Scale the probability from 16-bit to 32-bit while representing
- * the same percentage. */
- uint32_t probability = (os->probability << 16) | os->probability;
-
- commit_odp_actions(&ctx->flow, &ctx->base_flow, ctx->odp_actions);
-
- compose_flow_sample_cookie(os->probability, os->collector_set_id,
- os->obs_domain_id, os->obs_point_id, &cookie);
- compose_sample_action(ctx->ofproto, ctx->odp_actions, &ctx->flow,
- probability, &cookie, sizeof cookie.flow_sample);
-}
-
-static bool
-may_receive(const struct ofport_dpif *port, struct action_xlate_ctx *ctx)
-{
- if (port->up.pp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
- ? OFPUTIL_PC_NO_RECV_STP
- : OFPUTIL_PC_NO_RECV)) {
- return false;
- }
-
- /* Only drop packets here if both forwarding and learning are
- * disabled. If just learning is enabled, we need to have
- * OFPP_NORMAL and the learning action have a look at the packet
- * before we can drop it. */
- if (!stp_forward_in_state(port->stp_state)
- && !stp_learn_in_state(port->stp_state)) {
- return false;
- }
-
- return true;
-}
-
-static bool
-tunnel_ecn_ok(struct action_xlate_ctx *ctx)
-{
- if (is_ip_any(&ctx->base_flow)
- && (ctx->flow.tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) {
- if ((ctx->base_flow.nw_tos & IP_ECN_MASK) == IP_ECN_NOT_ECT) {
- VLOG_WARN_RL(&rl, "dropping tunnel packet marked ECN CE"
- " but is not ECN capable");
- return false;
- } else {
- /* Set the ECN CE value in the tunneled packet. */
- ctx->flow.nw_tos |= IP_ECN_CE;
- }
- }
-
- return true;
-}
-
-static void
-do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
- struct action_xlate_ctx *ctx)
-{
- bool was_evictable = true;
- const struct ofpact *a;
-
- if (ctx->rule) {
- /* Don't let the rule we're working on get evicted underneath us. */
- was_evictable = ctx->rule->up.evictable;
- ctx->rule->up.evictable = false;
- }
-
- do_xlate_actions_again:
- OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
- struct ofpact_controller *controller;
- const struct ofpact_metadata *metadata;
-
- if (ctx->exit) {
- break;
- }
-
- switch (a->type) {
- case OFPACT_OUTPUT:
- xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
- ofpact_get_OUTPUT(a)->max_len, true);
- break;
-
- case OFPACT_CONTROLLER:
- controller = ofpact_get_CONTROLLER(a);
- execute_controller_action(ctx, controller->max_len,
- controller->reason,
- controller->controller_id);
- break;
-
- case OFPACT_ENQUEUE:
- xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
- break;
-
- case OFPACT_SET_VLAN_VID:
- ctx->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
- ctx->flow.vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
- | htons(VLAN_CFI));
- break;
-
- case OFPACT_SET_VLAN_PCP:
- ctx->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
- ctx->flow.vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
- << VLAN_PCP_SHIFT)
- | VLAN_CFI);
- break;
-
- case OFPACT_STRIP_VLAN:
- ctx->flow.vlan_tci = htons(0);
- break;
-
- case OFPACT_PUSH_VLAN:
- /* XXX 802.1AD(QinQ) */
- ctx->flow.vlan_tci = htons(VLAN_CFI);
- break;
-
- case OFPACT_SET_ETH_SRC:
- memcpy(ctx->flow.dl_src, ofpact_get_SET_ETH_SRC(a)->mac,
- ETH_ADDR_LEN);
- break;
-
- case OFPACT_SET_ETH_DST:
- memcpy(ctx->flow.dl_dst, ofpact_get_SET_ETH_DST(a)->mac,
- ETH_ADDR_LEN);
- break;
-
- case OFPACT_SET_IPV4_SRC:
- if (ctx->flow.dl_type == htons(ETH_TYPE_IP)) {
- ctx->flow.nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
- }
- break;
-
- case OFPACT_SET_IPV4_DST:
- if (ctx->flow.dl_type == htons(ETH_TYPE_IP)) {
- ctx->flow.nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
- }
- break;
-
- case OFPACT_SET_IPV4_DSCP:
- /* OpenFlow 1.0 only supports IPv4. */
- if (ctx->flow.dl_type == htons(ETH_TYPE_IP)) {
- ctx->flow.nw_tos &= ~IP_DSCP_MASK;
- ctx->flow.nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp;
- }
- break;
-
- case OFPACT_SET_L4_SRC_PORT:
- if (is_ip_any(&ctx->flow)) {
- ctx->flow.tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
- }
- break;
-
- case OFPACT_SET_L4_DST_PORT:
- if (is_ip_any(&ctx->flow)) {
- ctx->flow.tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
- }
- break;
-
- case OFPACT_RESUBMIT:
- xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
- break;
-
- case OFPACT_SET_TUNNEL:
- ctx->flow.tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
- break;
-
- case OFPACT_SET_QUEUE:
- xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
- break;
-
- case OFPACT_POP_QUEUE:
- ctx->flow.skb_priority = ctx->orig_skb_priority;
- break;
-
- case OFPACT_REG_MOVE:
- nxm_execute_reg_move(ofpact_get_REG_MOVE(a), &ctx->flow);
- break;
-
- case OFPACT_REG_LOAD:
- nxm_execute_reg_load(ofpact_get_REG_LOAD(a), &ctx->flow);
- break;
-
- case OFPACT_STACK_PUSH:
- nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), &ctx->flow,
- &ctx->stack);
- break;
-
- case OFPACT_STACK_POP:
- nxm_execute_stack_pop(ofpact_get_STACK_POP(a), &ctx->flow,
- &ctx->stack);
- break;
-
- case OFPACT_PUSH_MPLS:
- execute_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a)->ethertype);
- break;
-
- case OFPACT_POP_MPLS:
- execute_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
- break;
-
- case OFPACT_SET_MPLS_TTL:
- if (execute_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl)) {
- goto out;
- }
- break;
-
- case OFPACT_DEC_MPLS_TTL:
- if (execute_dec_mpls_ttl_action(ctx)) {
- goto out;
- }
- break;
-
- case OFPACT_DEC_TTL:
- if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
- goto out;
- }
- break;
-
- case OFPACT_NOTE:
- /* Nothing to do. */
- break;
-
- case OFPACT_MULTIPATH:
- multipath_execute(ofpact_get_MULTIPATH(a), &ctx->flow);
- break;
-
- case OFPACT_BUNDLE:
- ctx->ofproto->has_bundle_action = true;
- xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
- break;
-
- case OFPACT_OUTPUT_REG:
- xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
- break;
-
- case OFPACT_LEARN:
- ctx->has_learn = true;
- if (ctx->may_learn) {
- xlate_learn_action(ctx, ofpact_get_LEARN(a));
- }
- break;
-
- case OFPACT_EXIT:
- ctx->exit = true;
- break;
-
- case OFPACT_FIN_TIMEOUT:
- ctx->has_fin_timeout = true;
- xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
- break;
-
- case OFPACT_CLEAR_ACTIONS:
- /* XXX
- * Nothing to do because writa-actions is not supported for now.
- * When writa-actions is supported, clear-actions also must
- * be supported at the same time.
- */
- break;
-
- case OFPACT_WRITE_METADATA:
- metadata = ofpact_get_WRITE_METADATA(a);
- ctx->flow.metadata &= ~metadata->mask;
- ctx->flow.metadata |= metadata->metadata & metadata->mask;
- break;
-
- case OFPACT_GOTO_TABLE: {
- /* It is assumed that goto-table is the last action. */
- struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
- struct rule_dpif *rule;
-
- ovs_assert(ctx->table_id < ogt->table_id);
-
- ctx->table_id = ogt->table_id;
-
- /* Look up a flow from the new table. */
- rule = rule_dpif_lookup__(ctx->ofproto, &ctx->flow, ctx->table_id);
-
- tag_the_flow(ctx, rule);
-
- rule = ctx_rule_hooks(ctx, rule, true);
-
- if (rule) {
- if (ctx->rule) {
- ctx->rule->up.evictable = was_evictable;
- }
- ctx->rule = rule;
- was_evictable = rule->up.evictable;
- rule->up.evictable = false;
-
- /* Tail recursion removal. */
- ofpacts = rule->up.ofpacts;
- ofpacts_len = rule->up.ofpacts_len;
- goto do_xlate_actions_again;
- }
- break;
- }
-
- case OFPACT_SAMPLE:
- xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
- break;
- }
- }
-
-out:
- if (ctx->rule) {
- ctx->rule->up.evictable = was_evictable;
- }
-}
-
-static void
-action_xlate_ctx_init(struct action_xlate_ctx *ctx,
- struct ofproto_dpif *ofproto, const struct flow *flow,
- const struct initial_vals *initial_vals,
- struct rule_dpif *rule,
- uint8_t tcp_flags, const struct ofpbuf *packet)
-{
- /* Flow initialization rules:
- * - 'base_flow' must match the kernel's view of the packet at the
- * time that action processing starts. 'flow' represents any
- * transformations we wish to make through actions.
- * - By default 'base_flow' and 'flow' are the same since the input
- * packet matches the output before any actions are applied.
- * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
- * of the received packet as seen by the kernel. If we later output
- * to another device without any modifications this will cause us to
- * insert a new tag since the original one was stripped off by the
- * VLAN device.
- * - Tunnel metadata as received is retained in 'flow'. This allows
- * tunnel metadata matching also in later tables.
- * Since a kernel action for setting the tunnel metadata will only be
- * generated with actual tunnel output, changing the tunnel metadata
- * values in 'flow' (such as tun_id) will only have effect with a later
- * tunnel output action.
- * - Tunnel 'base_flow' is completely cleared since that is what the
- * kernel does. If we wish to maintain the original values an action
- * needs to be generated. */
-
- ctx->ofproto = ofproto;
- ctx->flow = *flow;
- ctx->base_flow = ctx->flow;
- memset(&ctx->base_flow.tunnel, 0, sizeof ctx->base_flow.tunnel);
- ctx->rule = rule;
- ctx->packet = packet;
- ctx->may_learn = packet != NULL;
- ctx->tcp_flags = tcp_flags;
- ctx->resubmit_hook = NULL;
- ctx->report_hook = NULL;
- ctx->resubmit_stats = NULL;
-
- if (initial_vals) {
- ctx->base_flow.vlan_tci = initial_vals->vlan_tci;
- }
-}
-
-/* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
- * into datapath actions in 'odp_actions', using 'ctx'. */
-static void
-xlate_actions(struct action_xlate_ctx *ctx,
- const struct ofpact *ofpacts, size_t ofpacts_len,
- struct ofpbuf *odp_actions)
-{
- /* Normally false. Set to true if we ever hit MAX_RESUBMIT_RECURSION, so
- * that in the future we always keep a copy of the original flow for
- * tracing purposes. */
- static bool hit_resubmit_limit;
-
- enum slow_path_reason special;
- struct ofport_dpif *in_port;
- struct flow orig_flow;
-
- COVERAGE_INC(ofproto_dpif_xlate);
-
- ofpbuf_clear(odp_actions);
- ofpbuf_reserve(odp_actions, NL_A_U32_SIZE);
-
- ctx->odp_actions = odp_actions;
- ctx->tags = 0;
- ctx->slow = 0;
- ctx->has_learn = false;
- ctx->has_normal = false;
- ctx->has_fin_timeout = false;
- ctx->nf_output_iface = NF_OUT_DROP;
- ctx->mirrors = 0;
- ctx->recurse = 0;
- ctx->max_resubmit_trigger = false;
- ctx->orig_skb_priority = ctx->flow.skb_priority;
- ctx->table_id = 0;
- ctx->exit = false;
-
- ofpbuf_use_stub(&ctx->stack, ctx->init_stack, sizeof ctx->init_stack);
-
- if (ctx->ofproto->has_mirrors || hit_resubmit_limit) {
- /* Do this conditionally because the copy is expensive enough that it
- * shows up in profiles. */
- orig_flow = ctx->flow;
- }
-
- if (ctx->flow.nw_frag & FLOW_NW_FRAG_ANY) {
- switch (ctx->ofproto->up.frag_handling) {
- case OFPC_FRAG_NORMAL:
- /* We must pretend that transport ports are unavailable. */
- ctx->flow.tp_src = ctx->base_flow.tp_src = htons(0);
- ctx->flow.tp_dst = ctx->base_flow.tp_dst = htons(0);
- break;
-
- case OFPC_FRAG_DROP:
- return;
-
- case OFPC_FRAG_REASM:
- NOT_REACHED();
-
- case OFPC_FRAG_NX_MATCH:
- /* Nothing to do. */
- break;
-
- case OFPC_INVALID_TTL_TO_CONTROLLER:
- NOT_REACHED();
- }
- }
-
- in_port = get_ofp_port(ctx->ofproto, ctx->flow.in_port);
- special = process_special(ctx->ofproto, &ctx->flow, in_port, ctx->packet);
- if (special) {
- ctx->slow |= special;
- } else {
- static struct vlog_rate_limit trace_rl = VLOG_RATE_LIMIT_INIT(1, 1);
- struct initial_vals initial_vals;
- size_t sample_actions_len;
- uint32_t local_odp_port;
-
- initial_vals.vlan_tci = ctx->base_flow.vlan_tci;
-
- add_sflow_action(ctx);
- add_ipfix_action(ctx);
- sample_actions_len = ctx->odp_actions->size;
-
- if (tunnel_ecn_ok(ctx) && (!in_port || may_receive(in_port, ctx))) {
- do_xlate_actions(ofpacts, ofpacts_len, ctx);
-
- /* We've let OFPP_NORMAL and the learning action look at the
- * packet, so drop it now if forwarding is disabled. */
- if (in_port && !stp_forward_in_state(in_port->stp_state)) {
- ctx->odp_actions->size = sample_actions_len;
- }
- }
-
- if (ctx->max_resubmit_trigger && !ctx->resubmit_hook) {
- if (!hit_resubmit_limit) {
- /* We didn't record the original flow. Make sure we do from
- * now on. */
- hit_resubmit_limit = true;
- } else if (!VLOG_DROP_ERR(&trace_rl)) {
- struct ds ds = DS_EMPTY_INITIALIZER;
-
- ofproto_trace(ctx->ofproto, &orig_flow, ctx->packet,
- &initial_vals, &ds);
- VLOG_ERR("Trace triggered by excessive resubmit "
- "recursion:\n%s", ds_cstr(&ds));
- ds_destroy(&ds);
- }
- }
-
- local_odp_port = ofp_port_to_odp_port(ctx->ofproto, OFPP_LOCAL);
- if (!connmgr_may_set_up_flow(ctx->ofproto->up.connmgr, &ctx->flow,
- local_odp_port,
- ctx->odp_actions->data,
- ctx->odp_actions->size)) {
- ctx->slow |= SLOW_IN_BAND;
- if (ctx->packet
- && connmgr_msg_in_hook(ctx->ofproto->up.connmgr, &ctx->flow,
- ctx->packet)) {
- compose_output_action(ctx, OFPP_LOCAL);
- }
- }
- if (ctx->ofproto->has_mirrors) {
- add_mirror_actions(ctx, &orig_flow);
- }
- fix_sflow_action(ctx);
- }
-
- ofpbuf_uninit(&ctx->stack);
-}
-
-/* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
- * into datapath actions, using 'ctx', and discards the datapath actions. */
-static void
-xlate_actions_for_side_effects(struct action_xlate_ctx *ctx,
- const struct ofpact *ofpacts,
- size_t ofpacts_len)
-{
- uint64_t odp_actions_stub[1024 / 8];
- struct ofpbuf odp_actions;
-
- ofpbuf_use_stub(&odp_actions, odp_actions_stub, sizeof odp_actions_stub);
- xlate_actions(ctx, ofpacts, ofpacts_len, &odp_actions);
- ofpbuf_uninit(&odp_actions);
-}
-
-static void
-xlate_report(struct action_xlate_ctx *ctx, const char *s)
-{
- if (ctx->report_hook) {
- ctx->report_hook(ctx, s);
- }
-}
-\f
-/* OFPP_NORMAL implementation. */
-
-static struct ofport_dpif *ofbundle_get_a_port(const struct ofbundle *);
-
-/* Given 'vid', the VID obtained from the 802.1Q header that was received as
- * part of a packet (specify 0 if there was no 802.1Q header), and 'in_bundle',
- * the bundle on which the packet was received, returns the VLAN to which the
- * packet belongs.
- *
- * Both 'vid' and the return value are in the range 0...4095. */
-static uint16_t
-input_vid_to_vlan(const struct ofbundle *in_bundle, uint16_t vid)
-{
- switch (in_bundle->vlan_mode) {
- case PORT_VLAN_ACCESS:
- return in_bundle->vlan;
- break;
-
- case PORT_VLAN_TRUNK:
- return vid;
-
- case PORT_VLAN_NATIVE_UNTAGGED:
- case PORT_VLAN_NATIVE_TAGGED:
- return vid ? vid : in_bundle->vlan;
-
- default:
- NOT_REACHED();
- }
-}
-
-/* Checks whether a packet with the given 'vid' may ingress on 'in_bundle'.
- * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
- * a warning.
- *
- * 'vid' should be the VID obtained from the 802.1Q header that was received as
- * part of a packet (specify 0 if there was no 802.1Q header), in the range
- * 0...4095. */
-static bool
-input_vid_is_valid(uint16_t vid, struct ofbundle *in_bundle, bool warn)
-{
- /* Allow any VID on the OFPP_NONE port. */
- if (in_bundle == &ofpp_none_bundle) {
- return true;
- }
-
- switch (in_bundle->vlan_mode) {
- case PORT_VLAN_ACCESS:
- if (vid) {
- if (warn) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %"PRIu16" tagged "
- "packet received on port %s configured as VLAN "
- "%"PRIu16" access port",
- in_bundle->ofproto->up.name, vid,
- in_bundle->name, in_bundle->vlan);
- }
- return false;
- }
- return true;
-
- case PORT_VLAN_NATIVE_UNTAGGED:
- case PORT_VLAN_NATIVE_TAGGED:
- if (!vid) {
- /* Port must always carry its native VLAN. */
- return true;
- }
- /* Fall through. */
- case PORT_VLAN_TRUNK:
- if (!ofbundle_includes_vlan(in_bundle, vid)) {
- if (warn) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %"PRIu16" packet "
- "received on port %s not configured for trunking "
- "VLAN %"PRIu16,
- in_bundle->ofproto->up.name, vid,
- in_bundle->name, vid);
- }
- return false;
- }
- return true;
-
- default:
- NOT_REACHED();
- }
-
-}
-
-/* Given 'vlan', the VLAN that a packet belongs to, and
- * 'out_bundle', a bundle on which the packet is to be output, returns the VID
- * that should be included in the 802.1Q header. (If the return value is 0,
- * then the 802.1Q header should only be included in the packet if there is a
- * nonzero PCP.)
- *
- * Both 'vlan' and the return value are in the range 0...4095. */
-static uint16_t
-output_vlan_to_vid(const struct ofbundle *out_bundle, uint16_t vlan)
-{
- switch (out_bundle->vlan_mode) {
- case PORT_VLAN_ACCESS:
- return 0;
-
- case PORT_VLAN_TRUNK:
- case PORT_VLAN_NATIVE_TAGGED:
- return vlan;
-
- case PORT_VLAN_NATIVE_UNTAGGED:
- return vlan == out_bundle->vlan ? 0 : vlan;
-
- default:
- NOT_REACHED();
- }
-}
-
-static void
-output_normal(struct action_xlate_ctx *ctx, const struct ofbundle *out_bundle,
- uint16_t vlan)
-{
- struct ofport_dpif *port;
- uint16_t vid;
- ovs_be16 tci, old_tci;
-
- vid = output_vlan_to_vid(out_bundle, vlan);
- if (!out_bundle->bond) {
- port = ofbundle_get_a_port(out_bundle);
- } else {
- port = bond_choose_output_slave(out_bundle->bond, &ctx->flow,
- vid, &ctx->tags);
- if (!port) {
- /* No slaves enabled, so drop packet. */
- return;
- }
- }
-
- old_tci = ctx->flow.vlan_tci;
- tci = htons(vid);
- if (tci || out_bundle->use_priority_tags) {
- tci |= ctx->flow.vlan_tci & htons(VLAN_PCP_MASK);
- if (tci) {
- tci |= htons(VLAN_CFI);
- }
- }
- ctx->flow.vlan_tci = tci;
-
- compose_output_action(ctx, port->up.ofp_port);
- ctx->flow.vlan_tci = old_tci;
-}
-
-static int
-mirror_mask_ffs(mirror_mask_t mask)
-{
- BUILD_ASSERT_DECL(sizeof(unsigned int) >= sizeof(mask));
- return ffs(mask);
-}
-
-static bool
-ofbundle_trunks_vlan(const struct ofbundle *bundle, uint16_t vlan)
-{
- return (bundle->vlan_mode != PORT_VLAN_ACCESS
- && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
-}
-
-static bool
-ofbundle_includes_vlan(const struct ofbundle *bundle, uint16_t vlan)
-{
- return vlan == bundle->vlan || ofbundle_trunks_vlan(bundle, vlan);
-}
-
-/* Returns an arbitrary interface within 'bundle'. */
-static struct ofport_dpif *
-ofbundle_get_a_port(const struct ofbundle *bundle)
-{
- return CONTAINER_OF(list_front(&bundle->ports),
- struct ofport_dpif, bundle_node);
-}
-
-static bool
-vlan_is_mirrored(const struct ofmirror *m, int vlan)
-{
- return !m->vlans || bitmap_is_set(m->vlans, vlan);
-}
-
-static void
-add_mirror_actions(struct action_xlate_ctx *ctx, const struct flow *orig_flow)
-{
- struct ofproto_dpif *ofproto = ctx->ofproto;
- mirror_mask_t mirrors;
- struct ofbundle *in_bundle;
- uint16_t vlan;
- uint16_t vid;
- const struct nlattr *a;
- size_t left;
-
- in_bundle = lookup_input_bundle(ctx->ofproto, orig_flow->in_port,
- ctx->packet != NULL, NULL);
- if (!in_bundle) {
- return;
- }
- mirrors = in_bundle->src_mirrors;
-
- /* Drop frames on bundles reserved for mirroring. */
- if (in_bundle->mirror_out) {
- if (ctx->packet != NULL) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
- "%s, which is reserved exclusively for mirroring",
- ctx->ofproto->up.name, in_bundle->name);
- }
- return;
- }
-
- /* Check VLAN. */
- vid = vlan_tci_to_vid(orig_flow->vlan_tci);
- if (!input_vid_is_valid(vid, in_bundle, ctx->packet != NULL)) {
- return;
- }
- vlan = input_vid_to_vlan(in_bundle, vid);
-
- /* Look at the output ports to check for destination selections. */
-
- NL_ATTR_FOR_EACH (a, left, ctx->odp_actions->data,
- ctx->odp_actions->size) {
- enum ovs_action_attr type = nl_attr_type(a);
- struct ofport_dpif *ofport;
-
- if (type != OVS_ACTION_ATTR_OUTPUT) {
- continue;
- }
-
- ofport = get_odp_port(ofproto, nl_attr_get_u32(a));
- if (ofport && ofport->bundle) {
- mirrors |= ofport->bundle->dst_mirrors;
- }
- }
-
- if (!mirrors) {
- return;
- }
-
- /* Restore the original packet before adding the mirror actions. */
- ctx->flow = *orig_flow;
-
- while (mirrors) {
- struct ofmirror *m;
-
- m = ofproto->mirrors[mirror_mask_ffs(mirrors) - 1];
-
- if (!vlan_is_mirrored(m, vlan)) {
- mirrors = zero_rightmost_1bit(mirrors);
- continue;
- }
-
- mirrors &= ~m->dup_mirrors;
- ctx->mirrors |= m->dup_mirrors;
- if (m->out) {
- output_normal(ctx, m->out, vlan);
- } else if (vlan != m->out_vlan
- && !eth_addr_is_reserved(orig_flow->dl_dst)) {
- struct ofbundle *bundle;
-
- HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
- if (ofbundle_includes_vlan(bundle, m->out_vlan)
- && !bundle->mirror_out) {
- output_normal(ctx, bundle, m->out_vlan);
- }
- }
- }
- }
-}
-
-static void
-update_mirror_stats(struct ofproto_dpif *ofproto, mirror_mask_t mirrors,
- uint64_t packets, uint64_t bytes)
-{
- if (!mirrors) {
- return;
- }
-
- for (; mirrors; mirrors = zero_rightmost_1bit(mirrors)) {
- struct ofmirror *m;
-
- m = ofproto->mirrors[mirror_mask_ffs(mirrors) - 1];
-
- if (!m) {
- /* In normal circumstances 'm' will not be NULL. However,
- * if mirrors are reconfigured, we can temporarily get out
- * of sync in facet_revalidate(). We could "correct" the
- * mirror list before reaching here, but doing that would
- * not properly account the traffic stats we've currently
- * accumulated for previous mirror configuration. */
- continue;
- }
-
- m->packet_count += packets;
- m->byte_count += bytes;
- }
-}
-
-/* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
- * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
- * indicate this; newer upstream kernels use gratuitous ARP requests. */
-static bool
-is_gratuitous_arp(const struct flow *flow)
-{
- return (flow->dl_type == htons(ETH_TYPE_ARP)
- && eth_addr_is_broadcast(flow->dl_dst)
- && (flow->nw_proto == ARP_OP_REPLY
- || (flow->nw_proto == ARP_OP_REQUEST
- && flow->nw_src == flow->nw_dst)));
-}
-
-static void
-update_learning_table(struct ofproto_dpif *ofproto,
- const struct flow *flow, int vlan,
- struct ofbundle *in_bundle)
-{
- struct mac_entry *mac;
-
- /* Don't learn the OFPP_NONE port. */
- if (in_bundle == &ofpp_none_bundle) {
- return;
- }
-
- if (!mac_learning_may_learn(ofproto->ml, flow->dl_src, vlan)) {
- return;
- }
-
- mac = mac_learning_insert(ofproto->ml, flow->dl_src, vlan);
- if (is_gratuitous_arp(flow)) {
- /* We don't want to learn from gratuitous ARP packets that are
- * reflected back over bond slaves so we lock the learning table. */
- if (!in_bundle->bond) {
- mac_entry_set_grat_arp_lock(mac);
- } else if (mac_entry_is_grat_arp_locked(mac)) {
- return;
- }
- }
-
- if (mac_entry_is_new(mac) || mac->port.p != in_bundle) {
- /* The log messages here could actually be useful in debugging,
- * so keep the rate limit relatively high. */
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
- VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
- "on port %s in VLAN %d",
- ofproto->up.name, ETH_ADDR_ARGS(flow->dl_src),
- in_bundle->name, vlan);
-
- mac->port.p = in_bundle;
- tag_set_add(&ofproto->backer->revalidate_set,
- mac_learning_changed(ofproto->ml, mac));
- }
-}
-
-static struct ofbundle *
-lookup_input_bundle(const struct ofproto_dpif *ofproto, uint16_t in_port,
- bool warn, struct ofport_dpif **in_ofportp)
-{
- struct ofport_dpif *ofport;
-
- /* Find the port and bundle for the received packet. */
- ofport = get_ofp_port(ofproto, in_port);
- if (in_ofportp) {
- *in_ofportp = ofport;
- }
- if (ofport && ofport->bundle) {
- return ofport->bundle;
- }
-
- /* Special-case OFPP_NONE, which a controller may use as the ingress
- * port for traffic that it is sourcing. */
- if (in_port == OFPP_NONE) {
- return &ofpp_none_bundle;
- }
-
- /* Odd. A few possible reasons here:
- *
- * - We deleted a port but there are still a few packets queued up
- * from it.
- *
- * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
- * we don't know about.
- *
- * - The ofproto client didn't configure the port as part of a bundle.
- * This is particularly likely to happen if a packet was received on the
- * port after it was created, but before the client had a chance to
- * configure its bundle.
- */
- if (warn) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
-
- VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
- "port %"PRIu16, ofproto->up.name, in_port);
- }
- return NULL;
-}
-
-/* Determines whether packets in 'flow' within 'ofproto' should be forwarded or
- * dropped. Returns true if they may be forwarded, false if they should be
- * dropped.
- *
- * 'in_port' must be the ofport_dpif that corresponds to flow->in_port.
- * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
- *
- * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
- * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
- * checked by input_vid_is_valid().
- *
- * May also add tags to '*tags', although the current implementation only does
- * so in one special case.
- */
-static bool
-is_admissible(struct action_xlate_ctx *ctx, struct ofport_dpif *in_port,
- uint16_t vlan)
-{
- struct ofproto_dpif *ofproto = ctx->ofproto;
- struct flow *flow = &ctx->flow;
- struct ofbundle *in_bundle = in_port->bundle;
-
- /* Drop frames for reserved multicast addresses
- * only if forward_bpdu option is absent. */
- if (!ofproto->up.forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
- xlate_report(ctx, "packet has reserved destination MAC, dropping");
- return false;
- }
-
- if (in_bundle->bond) {
- struct mac_entry *mac;
-
- switch (bond_check_admissibility(in_bundle->bond, in_port,
- flow->dl_dst, &ctx->tags)) {
- case BV_ACCEPT:
- break;
-
- case BV_DROP:
- xlate_report(ctx, "bonding refused admissibility, dropping");
- return false;
-
- case BV_DROP_IF_MOVED:
- mac = mac_learning_lookup(ofproto->ml, flow->dl_src, vlan, NULL);
- if (mac && mac->port.p != in_bundle &&
- (!is_gratuitous_arp(flow)
- || mac_entry_is_grat_arp_locked(mac))) {
- xlate_report(ctx, "SLB bond thinks this packet looped back, "
- "dropping");
- return false;
- }
- break;
- }
- }
-
- return true;
-}
-
-static void
-xlate_normal(struct action_xlate_ctx *ctx)
-{
- struct ofport_dpif *in_port;
- struct ofbundle *in_bundle;
- struct mac_entry *mac;
- uint16_t vlan;
- uint16_t vid;
-
- ctx->has_normal = true;
-
- in_bundle = lookup_input_bundle(ctx->ofproto, ctx->flow.in_port,
- ctx->packet != NULL, &in_port);
- if (!in_bundle) {
- xlate_report(ctx, "no input bundle, dropping");
- return;
- }
-
- /* Drop malformed frames. */
- if (ctx->flow.dl_type == htons(ETH_TYPE_VLAN) &&
- !(ctx->flow.vlan_tci & htons(VLAN_CFI))) {
- if (ctx->packet != NULL) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
- "VLAN tag received on port %s",
- ctx->ofproto->up.name, in_bundle->name);
- }
- xlate_report(ctx, "partial VLAN tag, dropping");
- return;
- }
-
- /* Drop frames on bundles reserved for mirroring. */
- if (in_bundle->mirror_out) {
- if (ctx->packet != NULL) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
- "%s, which is reserved exclusively for mirroring",
- ctx->ofproto->up.name, in_bundle->name);
- }
- xlate_report(ctx, "input port is mirror output port, dropping");
- return;
- }
-
- /* Check VLAN. */
- vid = vlan_tci_to_vid(ctx->flow.vlan_tci);
- if (!input_vid_is_valid(vid, in_bundle, ctx->packet != NULL)) {
- xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
- return;
- }
- vlan = input_vid_to_vlan(in_bundle, vid);
-
- /* Check other admissibility requirements. */
- if (in_port && !is_admissible(ctx, in_port, vlan)) {
- return;
- }
-
- /* Learn source MAC. */
- if (ctx->may_learn) {
- update_learning_table(ctx->ofproto, &ctx->flow, vlan, in_bundle);
- }
-
- /* Determine output bundle. */
- mac = mac_learning_lookup(ctx->ofproto->ml, ctx->flow.dl_dst, vlan,
- &ctx->tags);
- if (mac) {
- if (mac->port.p != in_bundle) {
- xlate_report(ctx, "forwarding to learned port");
- output_normal(ctx, mac->port.p, vlan);
- } else {
- xlate_report(ctx, "learned port is input port, dropping");
- }
- } else {
- struct ofbundle *bundle;
-
- xlate_report(ctx, "no learned MAC for destination, flooding");
- HMAP_FOR_EACH (bundle, hmap_node, &ctx->ofproto->bundles) {
- if (bundle != in_bundle
- && ofbundle_includes_vlan(bundle, vlan)
- && bundle->floodable
- && !bundle->mirror_out) {
- output_normal(ctx, bundle, vlan);
- }
- }
- ctx->nf_output_iface = NF_OUT_FLOOD;
- }
-}