--- /dev/null
+/* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License. */
+
+#include <config.h>
+
+#include "ofproto/ofproto-dpif-xlate.h"
+
+#include "bitmap.h"
+#include "bond.h"
+#include "bundle.h"
+#include "byte-order.h"
+#include "connmgr.h"
+#include "coverage.h"
+#include "dpif.h"
+#include "dynamic-string.h"
+#include "learn.h"
+#include "mac-learning.h"
+#include "meta-flow.h"
+#include "multipath.h"
+#include "netdev-vport.h"
+#include "netlink.h"
+#include "nx-match.h"
+#include "odp-execute.h"
+#include "ofp-actions.h"
+#include "ofproto/ofproto-dpif-ipfix.h"
+#include "ofproto/ofproto-dpif-sflow.h"
+#include "ofproto/ofproto-dpif.h"
+#include "tunnel.h"
+#include "vlog.h"
+
+COVERAGE_DEFINE(ofproto_dpif_xlate);
+
+VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate);
+
+/* A controller may use OFPP_NONE as the ingress port to indicate that
+ * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
+ * when an input bundle is needed for validation (e.g., mirroring or
+ * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
+ * any 'port' structs, so care must be taken when dealing with it. */
+static struct ofbundle ofpp_none_bundle = {
+ .name = "OFPP_NONE",
+ .vlan_mode = PORT_VLAN_TRUNK
+};
+
+static bool may_receive(const struct ofport_dpif *, struct xlate_ctx *);
+static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
+ struct xlate_ctx *);
+static void xlate_normal(struct xlate_ctx *);
+static void xlate_report(struct xlate_ctx *, const char *);
+static void xlate_table_action(struct xlate_ctx *, uint16_t in_port,
+ uint8_t table_id, bool may_packet_in);
+static bool input_vid_is_valid(uint16_t vid, struct ofbundle *, bool warn);
+static uint16_t input_vid_to_vlan(const struct ofbundle *, uint16_t vid);
+static void output_normal(struct xlate_ctx *, const struct ofbundle *,
+ uint16_t vlan);
+static void compose_output_action(struct xlate_ctx *, uint16_t ofp_port);
+
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+
+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);
+}
+
+static bool
+vlan_is_mirrored(const struct ofmirror *m, int vlan)
+{
+ return !m->vlans || bitmap_is_set(m->vlans, vlan);
+}
+
+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;
+}
+
+static void
+add_mirror_actions(struct 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->xin->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->xin->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->xin->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->xout->odp_actions.data,
+ ctx->xout->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->xin->flow = *orig_flow;
+
+ while (mirrors) {
+ struct ofmirror *m;
+
+ m = ofproto->mirrors[mirror_mask_ffs(mirrors) - 1];
+
+ if (m->vlans) {
+ ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
+ }
+
+ if (!vlan_is_mirrored(m, vlan)) {
+ mirrors = zero_rightmost_1bit(mirrors);
+ continue;
+ }
+
+ mirrors &= ~m->dup_mirrors;
+ ctx->xout->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);
+ }
+ }
+ }
+ }
+}
+
+/* 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 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->xin->flow,
+ &ctx->xout->wc, vid, &ctx->xout->tags);
+ if (!port) {
+ /* No slaves enabled, so drop packet. */
+ return;
+ }
+ }
+
+ old_tci = ctx->xin->flow.vlan_tci;
+ tci = htons(vid);
+ if (tci || out_bundle->use_priority_tags) {
+ tci |= ctx->xin->flow.vlan_tci & htons(VLAN_PCP_MASK);
+ if (tci) {
+ tci |= htons(VLAN_CFI);
+ }
+ }
+ ctx->xin->flow.vlan_tci = tci;
+
+ compose_output_action(ctx, port->up.ofp_port);
+ ctx->xin->flow.vlan_tci = old_tci;
+}
+
+/* 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, struct flow_wildcards *wc)
+{
+ if (flow->dl_type != htons(ETH_TYPE_ARP)) {
+ return false;
+ }
+
+ memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
+ if (!eth_addr_is_broadcast(flow->dl_dst)) {
+ return false;
+ }
+
+ memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
+ if (flow->nw_proto == ARP_OP_REPLY) {
+ return true;
+ } else if (flow->nw_proto == ARP_OP_REQUEST) {
+ memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
+ memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
+
+ return flow->nw_src == flow->nw_dst;
+ } else {
+ return false;
+ }
+}
+
+static void
+update_learning_table(struct ofproto_dpif *ofproto,
+ const struct flow *flow, struct flow_wildcards *wc,
+ 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, wc)) {
+ /* 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));
+ }
+}
+
+/* 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 xlate_ctx *ctx, struct ofport_dpif *in_port,
+ uint16_t vlan)
+{
+ struct ofproto_dpif *ofproto = ctx->ofproto;
+ struct flow *flow = &ctx->xin->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->xout->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, &ctx->xout->wc)
+ || 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 xlate_ctx *ctx)
+{
+ struct ofport_dpif *in_port;
+ struct ofbundle *in_bundle;
+ struct mac_entry *mac;
+ uint16_t vlan;
+ uint16_t vid;
+
+ ctx->xout->has_normal = true;
+
+ /* Check the dl_type, since we may check for gratuituous ARP. */
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+
+ memset(&ctx->xout->wc.masks.dl_src, 0xff,
+ sizeof ctx->xout->wc.masks.dl_src);
+ memset(&ctx->xout->wc.masks.dl_dst, 0xff,
+ sizeof ctx->xout->wc.masks.dl_dst);
+ memset(&ctx->xout->wc.masks.vlan_tci, 0xff,
+ sizeof ctx->xout->wc.masks.vlan_tci);
+
+ in_bundle = lookup_input_bundle(ctx->ofproto, ctx->xin->flow.in_port,
+ ctx->xin->packet != NULL, &in_port);
+ if (!in_bundle) {
+ xlate_report(ctx, "no input bundle, dropping");
+ return;
+ }
+
+ /* Drop malformed frames. */
+ if (ctx->xin->flow.dl_type == htons(ETH_TYPE_VLAN) &&
+ !(ctx->xin->flow.vlan_tci & htons(VLAN_CFI))) {
+ if (ctx->xin->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->xin->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->xin->flow.vlan_tci);
+ if (!input_vid_is_valid(vid, in_bundle, ctx->xin->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->xin->may_learn) {
+ update_learning_table(ctx->ofproto, &ctx->xin->flow, &ctx->xout->wc,
+ vlan, in_bundle);
+ }
+
+ /* Determine output bundle. */
+ mac = mac_learning_lookup(ctx->ofproto->ml, ctx->xin->flow.dl_dst, vlan,
+ &ctx->xout->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->xout->nf_output_iface = NF_OUT_FLOOD;
+ }
+}
+
+/* Compose SAMPLE action for sFlow or IPFIX. The given probability is
+ * the number of packets out of UINT32_MAX to sample. The given
+ * cookie is passed back in the callback for each sampled packet.
+ */
+static size_t
+compose_sample_action(const struct ofproto_dpif *ofproto,
+ struct ofpbuf *odp_actions,
+ const struct flow *flow,
+ const uint32_t probability,
+ const union user_action_cookie *cookie,
+ const size_t cookie_size)
+{
+ size_t sample_offset, actions_offset;
+ int cookie_offset;
+
+ sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
+
+ nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
+
+ actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
+ cookie_offset = put_userspace_action(ofproto, odp_actions, flow, cookie,
+ cookie_size);
+
+ nl_msg_end_nested(odp_actions, actions_offset);
+ nl_msg_end_nested(odp_actions, sample_offset);
+ return cookie_offset;
+}
+
+static void
+compose_sflow_cookie(const struct ofproto_dpif *ofproto,
+ ovs_be16 vlan_tci, uint32_t odp_port,
+ unsigned int n_outputs, union user_action_cookie *cookie)
+{
+ int ifindex;
+
+ cookie->type = USER_ACTION_COOKIE_SFLOW;
+ cookie->sflow.vlan_tci = vlan_tci;
+
+ /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
+ * port information") for the interpretation of cookie->output. */
+ switch (n_outputs) {
+ case 0:
+ /* 0x40000000 | 256 means "packet dropped for unknown reason". */
+ cookie->sflow.output = 0x40000000 | 256;
+ break;
+
+ case 1:
+ ifindex = dpif_sflow_odp_port_to_ifindex(ofproto->sflow, odp_port);
+ if (ifindex) {
+ cookie->sflow.output = ifindex;
+ break;
+ }
+ /* Fall through. */
+ default:
+ /* 0x80000000 means "multiple output ports. */
+ cookie->sflow.output = 0x80000000 | n_outputs;
+ break;
+ }
+}
+
+/* Compose SAMPLE action for sFlow bridge sampling. */
+static size_t
+compose_sflow_action(const struct ofproto_dpif *ofproto,
+ struct ofpbuf *odp_actions,
+ const struct flow *flow,
+ uint32_t odp_port)
+{
+ uint32_t probability;
+ union user_action_cookie cookie;
+
+ if (!ofproto->sflow || flow->in_port == OFPP_NONE) {
+ return 0;
+ }
+
+ probability = dpif_sflow_get_probability(ofproto->sflow);
+ compose_sflow_cookie(ofproto, htons(0), odp_port,
+ odp_port == OVSP_NONE ? 0 : 1, &cookie);
+
+ return compose_sample_action(ofproto, odp_actions, flow, probability,
+ &cookie, sizeof cookie.sflow);
+}
+
+static void
+compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
+ uint32_t obs_domain_id, uint32_t obs_point_id,
+ union user_action_cookie *cookie)
+{
+ cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
+ cookie->flow_sample.probability = probability;
+ cookie->flow_sample.collector_set_id = collector_set_id;
+ cookie->flow_sample.obs_domain_id = obs_domain_id;
+ cookie->flow_sample.obs_point_id = obs_point_id;
+}
+
+static void
+compose_ipfix_cookie(union user_action_cookie *cookie)
+{
+ cookie->type = USER_ACTION_COOKIE_IPFIX;
+}
+
+/* Compose SAMPLE action for IPFIX bridge sampling. */
+static void
+compose_ipfix_action(const struct ofproto_dpif *ofproto,
+ struct ofpbuf *odp_actions,
+ const struct flow *flow)
+{
+ uint32_t probability;
+ union user_action_cookie cookie;
+
+ if (!ofproto->ipfix || flow->in_port == OFPP_NONE) {
+ return;
+ }
+
+ probability = dpif_ipfix_get_bridge_exporter_probability(ofproto->ipfix);
+ compose_ipfix_cookie(&cookie);
+
+ compose_sample_action(ofproto, odp_actions, flow, probability,
+ &cookie, sizeof cookie.ipfix);
+}
+
+/* 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 xlate_ctx *ctx)
+{
+ ctx->user_cookie_offset = compose_sflow_action(ctx->ofproto,
+ &ctx->xout->odp_actions,
+ &ctx->xin->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 xlate_ctx *ctx)
+{
+ compose_ipfix_action(ctx->ofproto, &ctx->xout->odp_actions,
+ &ctx->xin->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 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->xout->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 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->xin->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->xin->flow.in_port = peer->up.ofp_port;
+ ctx->xin->flow.metadata = htonll(0);
+ memset(&ctx->xin->flow.tunnel, 0, sizeof ctx->xin->flow.tunnel);
+ memset(ctx->xin->flow.regs, 0, sizeof ctx->xin->flow.regs);
+
+ in_port = get_ofp_port(ctx->ofproto, ctx->xin->flow.in_port);
+ special = process_special(ctx->ofproto, &ctx->xin->flow, in_port,
+ ctx->xin->packet);
+ if (special) {
+ ctx->xout->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->xin->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->xout->odp_actions.size;
+ xlate_table_action(ctx, ctx->xin->flow.in_port, 0, true);
+ ctx->base_flow = old_base_flow;
+ ctx->xout->odp_actions.size = old_size;
+ }
+ }
+
+ ctx->xin->flow = old_flow;
+ ctx->ofproto = ofproto_dpif_cast(ofport->up.ofproto);
+
+ if (ctx->xin->resubmit_stats) {
+ netdev_vport_inc_tx(ofport->up.netdev, ctx->xin->resubmit_stats);
+ netdev_vport_inc_rx(peer->up.netdev, ctx->xin->resubmit_stats);
+ }
+
+ return;
+ }
+
+ flow_vlan_tci = ctx->xin->flow.vlan_tci;
+ flow_skb_mark = ctx->xin->flow.skb_mark;
+ flow_nw_tos = ctx->xin->flow.nw_tos;
+
+ pdscp = get_priority(ofport, ctx->xin->flow.skb_priority);
+ if (pdscp) {
+ ctx->xin->flow.nw_tos &= ~IP_DSCP_MASK;
+ ctx->xin->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->xin->flow.tunnel;
+ odp_port = tnl_port_send(ofport->tnl_port, &ctx->xin->flow);
+ if (odp_port == OVSP_NONE) {
+ xlate_report(ctx, "Tunneling decided against output");
+ goto out; /* restore flow_nw_tos */
+ }
+ if (ctx->xin->flow.tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
+ xlate_report(ctx, "Not tunneling to our own address");
+ goto out; /* restore flow_nw_tos */
+ }
+ if (ctx->xin->resubmit_stats) {
+ netdev_vport_inc_tx(ofport->up.netdev, ctx->xin->resubmit_stats);
+ }
+ out_port = odp_port;
+ commit_odp_tunnel_action(&ctx->xin->flow, &ctx->base_flow,
+ &ctx->xout->odp_actions);
+ ctx->xin->flow.tunnel = flow_tnl; /* Restore tunnel metadata */
+ } else {
+ uint16_t vlandev_port;
+ odp_port = ofport->odp_port;
+ vlandev_port = vsp_realdev_to_vlandev(ctx->ofproto, ofp_port,
+ ctx->xin->flow.vlan_tci);
+ if (vlandev_port == ofp_port) {
+ out_port = odp_port;
+ } else {
+ out_port = ofp_port_to_odp_port(ctx->ofproto, vlandev_port);
+ ctx->xin->flow.vlan_tci = htons(0);
+ }
+ ctx->xin->flow.skb_mark &= ~IPSEC_MARK;
+ }
+ commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
+ &ctx->xout->odp_actions);
+ nl_msg_put_u32(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, out_port);
+
+ ctx->sflow_odp_port = odp_port;
+ ctx->sflow_n_outputs++;
+ ctx->xout->nf_output_iface = ofp_port;
+
+ /* Restore flow */
+ ctx->xin->flow.vlan_tci = flow_vlan_tci;
+ ctx->xin->flow.skb_mark = flow_skb_mark;
+ out:
+ ctx->xin->flow.nw_tos = flow_nw_tos;
+}
+
+static void
+compose_output_action(struct xlate_ctx *ctx, uint16_t ofp_port)
+{
+ compose_output_action__(ctx, ofp_port, true);
+}
+
+static void
+tag_the_flow(struct 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->xout->tags |= (rule && rule->tag
+ ? rule->tag
+ : rule_calculate_tag(&ctx->xin->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 xlate_ctx *ctx, struct rule_dpif *rule,
+ bool may_packet_in)
+{
+ if (ctx->xin->resubmit_hook) {
+ ctx->xin->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->xin->flow);
+ }
+ if (rule && ctx->xin->resubmit_stats) {
+ rule_credit_stats(rule, ctx->xin->resubmit_stats);
+ }
+ return rule;
+}
+
+static void
+xlate_table_action(struct 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->xin->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->xin->flow.in_port = in_port;
+ rule = rule_dpif_lookup_in_table(ctx->ofproto, &ctx->xin->flow,
+ &ctx->xout->wc, table_id);
+
+ tag_the_flow(ctx, rule);
+
+ /* Restore the original input port. Otherwise OFPP_NORMAL and
+ * OFPP_IN_PORT will have surprising behavior. */
+ ctx->xin->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 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->xin->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 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->xin->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->xout->nf_output_iface = NF_OUT_FLOOD;
+}
+
+static void
+execute_controller_action(struct xlate_ctx *ctx, int len,
+ enum ofp_packet_in_reason reason,
+ uint16_t controller_id)
+{
+ struct ofputil_packet_in pin;
+ struct ofpbuf *packet;
+ struct flow key;
+
+ ovs_assert(!ctx->xout->slow || ctx->xout->slow == SLOW_CONTROLLER);
+ ctx->xout->slow = SLOW_CONTROLLER;
+ if (!ctx->xin->packet) {
+ return;
+ }
+
+ packet = ofpbuf_clone(ctx->xin->packet);
+
+ key.skb_priority = 0;
+ key.skb_mark = 0;
+ memset(&key.tunnel, 0, sizeof key.tunnel);
+
+ commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
+ &ctx->xout->odp_actions);
+
+ odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data,
+ ctx->xout->odp_actions.size, NULL, NULL);
+
+ 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->xin->flow, &pin.fmd);
+
+ connmgr_send_packet_in(ctx->ofproto->up.connmgr, &pin);
+ ofpbuf_delete(packet);
+}
+
+static void
+execute_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
+{
+ ovs_assert(eth_type_mpls(eth_type));
+
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ memset(&ctx->xout->wc.masks.mpls_lse, 0xff,
+ sizeof ctx->xout->wc.masks.mpls_lse);
+ memset(&ctx->xout->wc.masks.mpls_depth, 0xff,
+ sizeof ctx->xout->wc.masks.mpls_depth);
+
+ if (ctx->base_flow.mpls_depth) {
+ ctx->xin->flow.mpls_lse &= ~htonl(MPLS_BOS_MASK);
+ ctx->xin->flow.mpls_depth++;
+ } else {
+ ovs_be32 label;
+ uint8_t tc, ttl;
+
+ if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IPV6)) {
+ label = htonl(0x2); /* IPV6 Explicit Null. */
+ } else {
+ label = htonl(0x0); /* IPV4 Explicit Null. */
+ }
+ tc = (ctx->xin->flow.nw_tos & IP_DSCP_MASK) >> 2;
+ ttl = ctx->xin->flow.nw_ttl ? ctx->xin->flow.nw_ttl : 0x40;
+ ctx->xin->flow.mpls_lse = set_mpls_lse_values(ttl, tc, 1, label);
+ ctx->xin->flow.mpls_depth = 1;
+ }
+ ctx->xin->flow.dl_type = eth_type;
+}
+
+static void
+execute_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
+{
+ ovs_assert(eth_type_mpls(ctx->xin->flow.dl_type));
+ ovs_assert(!eth_type_mpls(eth_type));
+
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ memset(&ctx->xout->wc.masks.mpls_lse, 0xff,
+ sizeof ctx->xout->wc.masks.mpls_lse);
+ memset(&ctx->xout->wc.masks.mpls_depth, 0xff,
+ sizeof ctx->xout->wc.masks.mpls_depth);
+
+ if (ctx->xin->flow.mpls_depth) {
+ ctx->xin->flow.mpls_depth--;
+ ctx->xin->flow.mpls_lse = htonl(0);
+ if (!ctx->xin->flow.mpls_depth) {
+ ctx->xin->flow.dl_type = eth_type;
+ }
+ }
+}
+
+static bool
+compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
+{
+ if (ctx->xin->flow.dl_type != htons(ETH_TYPE_IP) &&
+ ctx->xin->flow.dl_type != htons(ETH_TYPE_IPV6)) {
+ return false;
+ }
+
+ if (ctx->xin->flow.nw_ttl > 1) {
+ ctx->xin->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 xlate_ctx *ctx, uint8_t ttl)
+{
+ if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
+ return true;
+ }
+
+ set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl);
+ return false;
+}
+
+static bool
+execute_dec_mpls_ttl_action(struct xlate_ctx *ctx)
+{
+ uint8_t ttl = mpls_lse_to_ttl(ctx->xin->flow.mpls_lse);
+
+ if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
+ return false;
+ }
+
+ if (ttl > 1) {
+ ttl--;
+ set_mpls_lse_ttl(&ctx->xin->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 xlate_ctx *ctx,
+ uint16_t port, uint16_t max_len, bool may_packet_in)
+{
+ uint16_t prev_nf_output_iface = ctx->xout->nf_output_iface;
+
+ ctx->xout->nf_output_iface = NF_OUT_DROP;
+
+ switch (port) {
+ case OFPP_IN_PORT:
+ compose_output_action(ctx, ctx->xin->flow.in_port);
+ break;
+ case OFPP_TABLE:
+ xlate_table_action(ctx, ctx->xin->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->xin->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->xout->nf_output_iface = NF_OUT_FLOOD;
+ } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
+ ctx->xout->nf_output_iface = prev_nf_output_iface;
+ } else if (prev_nf_output_iface != NF_OUT_DROP &&
+ ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
+ ctx->xout->nf_output_iface = NF_OUT_MULTI;
+ }
+}
+
+static void
+xlate_output_reg_action(struct xlate_ctx *ctx,
+ const struct ofpact_output_reg *or)
+{
+ uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
+ if (port <= UINT16_MAX) {
+ union mf_subvalue value;
+
+ memset(&value, 0xff, sizeof value);
+ mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
+ xlate_output_action(ctx, port, or->max_len, false);
+ }
+}
+
+static void
+xlate_enqueue_action(struct 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->xin->flow.in_port;
+ } else if (ofp_port == ctx->xin->flow.in_port) {
+ return;
+ }
+
+ /* Add datapath actions. */
+ flow_priority = ctx->xin->flow.skb_priority;
+ ctx->xin->flow.skb_priority = priority;
+ compose_output_action(ctx, ofp_port);
+ ctx->xin->flow.skb_priority = flow_priority;
+
+ /* Update NetFlow output port. */
+ if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
+ ctx->xout->nf_output_iface = ofp_port;
+ } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
+ ctx->xout->nf_output_iface = NF_OUT_MULTI;
+ }
+}
+
+static void
+xlate_set_queue_action(struct 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->xin->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 xlate_ctx *ctx,
+ const struct ofpact_bundle *bundle)
+{
+ uint16_t port;
+
+ port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
+ slave_enabled_cb, ctx->ofproto);
+ if (bundle->dst.field) {
+ nxm_reg_load(&bundle->dst, port, &ctx->xin->flow);
+ } else {
+ xlate_output_action(ctx, port, 0, false);
+ }
+}
+
+static void
+xlate_learn_action(struct 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;
+
+ ctx->xout->has_learn = true;
+
+ learn_mask(learn, &ctx->xout->wc);
+
+ if (!ctx->xin->may_learn) {
+ return;
+ }
+
+ ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
+ learn_execute(learn, &ctx->xin->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 xlate_ctx *ctx,
+ const struct ofpact_fin_timeout *oft)
+{
+ if (ctx->xin->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 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->xin->flow, &ctx->base_flow,
+ &ctx->xout->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->xout->odp_actions, &ctx->xin->flow,
+ probability, &cookie, sizeof cookie.flow_sample);
+}
+
+static bool
+may_receive(const struct ofport_dpif *port, struct xlate_ctx *ctx)
+{
+ if (port->up.pp.config & (eth_addr_equals(ctx->xin->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 xlate_ctx *ctx)
+{
+ if (is_ip_any(&ctx->base_flow)
+ && (ctx->xin->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->xin->flow.nw_tos |= IP_ECN_CE;
+ }
+ }
+
+ return true;
+}
+
+static void
+do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
+ struct 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->xin->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
+ ctx->xin->flow.vlan_tci |=
+ (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
+ | htons(VLAN_CFI));
+ break;
+
+ case OFPACT_SET_VLAN_PCP:
+ ctx->xin->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
+ ctx->xin->flow.vlan_tci |=
+ htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp << VLAN_PCP_SHIFT)
+ | VLAN_CFI);
+ break;
+
+ case OFPACT_STRIP_VLAN:
+ ctx->xin->flow.vlan_tci = htons(0);
+ break;
+
+ case OFPACT_PUSH_VLAN:
+ /* XXX 802.1AD(QinQ) */
+ ctx->xin->flow.vlan_tci = htons(VLAN_CFI);
+ break;
+
+ case OFPACT_SET_ETH_SRC:
+ memcpy(ctx->xin->flow.dl_src, ofpact_get_SET_ETH_SRC(a)->mac,
+ ETH_ADDR_LEN);
+ break;
+
+ case OFPACT_SET_ETH_DST:
+ memcpy(ctx->xin->flow.dl_dst, ofpact_get_SET_ETH_DST(a)->mac,
+ ETH_ADDR_LEN);
+ break;
+
+ case OFPACT_SET_IPV4_SRC:
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IP)) {
+ ctx->xin->flow.nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
+ }
+ break;
+
+ case OFPACT_SET_IPV4_DST:
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IP)) {
+ ctx->xin->flow.nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
+ }
+ break;
+
+ case OFPACT_SET_IPV4_DSCP:
+ /* OpenFlow 1.0 only supports IPv4. */
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IP)) {
+ ctx->xin->flow.nw_tos &= ~IP_DSCP_MASK;
+ ctx->xin->flow.nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp;
+ }
+ break;
+
+ case OFPACT_SET_L4_SRC_PORT:
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ memset(&ctx->xout->wc.masks.nw_proto, 0xff,
+ sizeof ctx->xout->wc.masks.nw_proto);
+ if (is_ip_any(&ctx->xin->flow)) {
+ ctx->xin->flow.tp_src =
+ htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
+ }
+ break;
+
+ case OFPACT_SET_L4_DST_PORT:
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ memset(&ctx->xout->wc.masks.nw_proto, 0xff,
+ sizeof ctx->xout->wc.masks.nw_proto);
+ if (is_ip_any(&ctx->xin->flow)) {
+ ctx->xin->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->xin->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:
+ memset(&ctx->xout->wc.masks.skb_priority, 0xff,
+ sizeof ctx->xout->wc.masks.skb_priority);
+
+ ctx->xin->flow.skb_priority = ctx->orig_skb_priority;
+ break;
+
+ case OFPACT_REG_MOVE:
+ nxm_execute_reg_move(ofpact_get_REG_MOVE(a), &ctx->xin->flow,
+ &ctx->xout->wc);
+ break;
+
+ case OFPACT_REG_LOAD:
+ nxm_execute_reg_load(ofpact_get_REG_LOAD(a), &ctx->xin->flow);
+ break;
+
+ case OFPACT_STACK_PUSH:
+ nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), &ctx->xin->flow,
+ &ctx->xout->wc, &ctx->stack);
+ break;
+
+ case OFPACT_STACK_POP:
+ nxm_execute_stack_pop(ofpact_get_STACK_POP(a), &ctx->xin->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:
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ 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->xin->flow,
+ &ctx->xout->wc);
+ 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:
+ xlate_learn_action(ctx, ofpact_get_LEARN(a));
+ break;
+
+ case OFPACT_EXIT:
+ ctx->exit = true;
+ break;
+
+ case OFPACT_FIN_TIMEOUT:
+ memset(&ctx->xout->wc.masks.dl_type, 0xff,
+ sizeof ctx->xout->wc.masks.dl_type);
+ memset(&ctx->xout->wc.masks.nw_proto, 0xff,
+ sizeof ctx->xout->wc.masks.nw_proto);
+ ctx->xout->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->xin->flow.metadata &= ~metadata->mask;
+ ctx->xin->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_in_table(ctx->ofproto, &ctx->xin->flow,
+ &ctx->xout->wc, 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;
+ }
+}
+
+void
+xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
+ const struct flow *flow, struct rule_dpif *rule,
+ uint8_t tcp_flags, const struct ofpbuf *packet)
+{
+ xin->ofproto = ofproto;
+ xin->flow = *flow;
+ xin->packet = packet;
+ xin->may_learn = packet != NULL;
+ xin->rule = rule;
+ xin->ofpacts = NULL;
+ xin->ofpacts_len = 0;
+ xin->tcp_flags = tcp_flags;
+ xin->resubmit_hook = NULL;
+ xin->report_hook = NULL;
+ xin->resubmit_stats = NULL;
+}
+
+void
+xlate_out_uninit(struct xlate_out *xout)
+{
+ if (xout) {
+ ofpbuf_uninit(&xout->odp_actions);
+ }
+}
+
+/* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
+ * into datapath actions, using 'ctx', and discards the datapath actions. */
+void
+xlate_actions_for_side_effects(struct xlate_in *xin)
+{
+ struct xlate_out xout;
+
+ xlate_actions(xin, &xout);
+ xlate_out_uninit(&xout);
+}
+
+static void
+xlate_report(struct xlate_ctx *ctx, const char *s)
+{
+ if (ctx->xin->report_hook) {
+ ctx->xin->report_hook(ctx, s);
+ }
+}
+
+void
+xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
+{
+ dst->wc = src->wc;
+ dst->tags = src->tags;
+ dst->slow = src->slow;
+ dst->has_learn = src->has_learn;
+ dst->has_normal = src->has_normal;
+ dst->has_fin_timeout = src->has_fin_timeout;
+ dst->nf_output_iface = src->nf_output_iface;
+ dst->mirrors = src->mirrors;
+
+ ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
+ sizeof dst->odp_actions_stub);
+ ofpbuf_put(&dst->odp_actions, src->odp_actions.data,
+ src->odp_actions.size);
+}
+\f
+
+/* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
+ * into datapath actions in 'odp_actions', using 'ctx'. */
+void
+xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
+{
+ /* 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;
+ const struct ofpact *ofpacts;
+ struct ofport_dpif *in_port;
+ struct flow orig_flow;
+ struct xlate_ctx ctx;
+ size_t ofpacts_len;
+
+ COVERAGE_INC(ofproto_dpif_xlate);
+
+ /* 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.xin = xin;
+ ctx.xout = xout;
+
+ ctx.ofproto = xin->ofproto;
+ ctx.rule = xin->rule;
+
+ ctx.base_flow = ctx.xin->flow;
+ memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
+ ctx.orig_tunnel_ip_dst = ctx.xin->flow.tunnel.ip_dst;
+
+ flow_wildcards_init_catchall(&ctx.xout->wc);
+ memset(&ctx.xout->wc.masks.in_port, 0xff,
+ sizeof ctx.xout->wc.masks.in_port);
+
+ if (tnl_port_should_receive(&ctx.xin->flow)) {
+ memset(&ctx.xout->wc.masks.tunnel, 0xff,
+ sizeof ctx.xout->wc.masks.tunnel);
+ }
+
+ /* Disable most wildcarding for NetFlow. */
+ if (xin->ofproto->netflow) {
+ memset(&ctx.xout->wc.masks.dl_src, 0xff,
+ sizeof ctx.xout->wc.masks.dl_src);
+ memset(&ctx.xout->wc.masks.dl_dst, 0xff,
+ sizeof ctx.xout->wc.masks.dl_dst);
+ memset(&ctx.xout->wc.masks.dl_type, 0xff,
+ sizeof ctx.xout->wc.masks.dl_type);
+ memset(&ctx.xout->wc.masks.vlan_tci, 0xff,
+ sizeof ctx.xout->wc.masks.vlan_tci);
+ memset(&ctx.xout->wc.masks.nw_proto, 0xff,
+ sizeof ctx.xout->wc.masks.nw_proto);
+ memset(&ctx.xout->wc.masks.nw_src, 0xff,
+ sizeof ctx.xout->wc.masks.nw_src);
+ memset(&ctx.xout->wc.masks.nw_dst, 0xff,
+ sizeof ctx.xout->wc.masks.nw_dst);
+ memset(&ctx.xout->wc.masks.tp_src, 0xff,
+ sizeof ctx.xout->wc.masks.tp_src);
+ memset(&ctx.xout->wc.masks.tp_dst, 0xff,
+ sizeof ctx.xout->wc.masks.tp_dst);
+ }
+
+ ctx.xout->tags = 0;
+ ctx.xout->slow = 0;
+ ctx.xout->has_learn = false;
+ ctx.xout->has_normal = false;
+ ctx.xout->has_fin_timeout = false;
+ ctx.xout->nf_output_iface = NF_OUT_DROP;
+ ctx.xout->mirrors = 0;
+
+ ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
+ sizeof ctx.xout->odp_actions_stub);
+ ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
+
+ ctx.recurse = 0;
+ ctx.max_resubmit_trigger = false;
+ ctx.orig_skb_priority = ctx.xin->flow.skb_priority;
+ ctx.table_id = 0;
+ ctx.exit = false;
+
+ if (xin->ofpacts) {
+ ofpacts = xin->ofpacts;
+ ofpacts_len = xin->ofpacts_len;
+ } else if (xin->rule) {
+ ofpacts = xin->rule->up.ofpacts;
+ ofpacts_len = xin->rule->up.ofpacts_len;
+ } else {
+ NOT_REACHED();
+ }
+
+ 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.xin->flow;
+ }
+
+ if (ctx.xin->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.xin->flow.tp_src = ctx.base_flow.tp_src = htons(0);
+ ctx.xin->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.xin->flow.in_port);
+ special = process_special(ctx.ofproto, &ctx.xin->flow, in_port,
+ ctx.xin->packet);
+ if (special) {
+ ctx.xout->slow = special;
+ } else {
+ static struct vlog_rate_limit trace_rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ size_t sample_actions_len;
+ uint32_t local_odp_port;
+
+ if (ctx.xin->flow.in_port
+ != vsp_realdev_to_vlandev(ctx.ofproto, ctx.xin->flow.in_port,
+ ctx.xin->flow.vlan_tci)) {
+ ctx.base_flow.vlan_tci = 0;
+ }
+
+ add_sflow_action(&ctx);
+ add_ipfix_action(&ctx);
+ sample_actions_len = ctx.xout->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.xout->odp_actions.size = sample_actions_len;
+ }
+ }
+
+ if (ctx.max_resubmit_trigger && !ctx.xin->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.xin->packet, &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_must_output_local(ctx.ofproto->up.connmgr, &ctx.xin->flow,
+ local_odp_port,
+ ctx.xout->odp_actions.data,
+ ctx.xout->odp_actions.size)) {
+ 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);
+
+ /* Clear the metadata and register wildcard masks, because we won't
+ * use non-header fields as part of the cache. */
+ memset(&ctx.xout->wc.masks.metadata, 0,
+ sizeof ctx.xout->wc.masks.metadata);
+ memset(&ctx.xout->wc.masks.regs, 0, sizeof ctx.xout->wc.masks.regs);
+}
#include <config.h>
+#include "ofproto/ofproto-dpif.h"
#include "ofproto/ofproto-provider.h"
#include <errno.h>
#include "ofproto-dpif-governor.h"
#include "ofproto-dpif-ipfix.h"
#include "ofproto-dpif-sflow.h"
+#include "ofproto-dpif-xlate.h"
#include "poll-loop.h"
#include "simap.h"
#include "smap.h"
VLOG_DEFINE_THIS_MODULE(ofproto_dpif);
COVERAGE_DEFINE(ofproto_dpif_expired);
-COVERAGE_DEFINE(ofproto_dpif_xlate);
COVERAGE_DEFINE(facet_changed_rule);
COVERAGE_DEFINE(facet_revalidate);
COVERAGE_DEFINE(facet_unexpected);
COVERAGE_DEFINE(facet_suppress);
-/* Maximum depth of flow table recursion (due to resubmit actions) in a
- * flow translation. */
-#define MAX_RESUBMIT_RECURSION 64
-
-/* Number of implemented OpenFlow tables. */
-enum { N_TABLES = 255 };
-enum { TBL_INTERNAL = N_TABLES - 1 }; /* Used for internal hidden rules. */
-BUILD_ASSERT_DECL(N_TABLES >= 2 && N_TABLES <= 255);
-
-struct ofport_dpif;
-struct ofproto_dpif;
struct flow_miss;
struct facet;
-struct rule_dpif {
- struct rule up;
-
- /* These statistics:
- *
- * - Do include packets and bytes from facets that have been deleted or
- * whose own statistics have been folded into the rule.
- *
- * - Do include packets and bytes sent "by hand" that were accounted to
- * the rule without any facet being involved (this is a rare corner
- * case in rule_execute()).
- *
- * - Do not include packet or bytes that can be obtained from any facet's
- * packet_count or byte_count member or that can be obtained from the
- * datapath by, e.g., dpif_flow_get() for any subfacet.
- */
- uint64_t packet_count; /* Number of packets received. */
- uint64_t byte_count; /* Number of bytes received. */
-
- tag_type tag; /* Caches rule_calculate_tag() result. */
-
- struct list facets; /* List of "struct facet"s. */
-};
-
-static struct rule_dpif *rule_dpif_cast(const struct rule *rule)
-{
- return rule ? CONTAINER_OF(rule, struct rule_dpif, up) : NULL;
-}
-
static struct rule_dpif *rule_dpif_lookup(struct ofproto_dpif *,
const struct flow *,
struct flow_wildcards *wc);
-static struct rule_dpif *rule_dpif_lookup__(struct ofproto_dpif *,
- const struct flow *,
- struct flow_wildcards *wc,
- uint8_t table);
-static struct rule_dpif *rule_dpif_miss_rule(struct ofproto_dpif *ofproto,
- const struct flow *flow);
static void rule_get_stats(struct rule *, uint64_t *packets, uint64_t *bytes);
-static void rule_credit_stats(struct rule_dpif *,
- const struct dpif_flow_stats *);
-static tag_type rule_calculate_tag(const struct flow *,
- const struct minimask *, uint32_t basis);
static void rule_invalidate(const struct rule_dpif *);
-#define MAX_MIRRORS 32
-typedef uint32_t mirror_mask_t;
-#define MIRROR_MASK_C(X) UINT32_C(X)
-BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS);
-struct ofmirror {
- struct ofproto_dpif *ofproto; /* Owning ofproto. */
- size_t idx; /* In ofproto's "mirrors" array. */
- void *aux; /* Key supplied by ofproto's client. */
- char *name; /* Identifier for log messages. */
-
- /* Selection criteria. */
- struct hmapx srcs; /* Contains "struct ofbundle *"s. */
- struct hmapx dsts; /* Contains "struct ofbundle *"s. */
- unsigned long *vlans; /* Bitmap of chosen VLANs, NULL selects all. */
-
- /* Output (exactly one of out == NULL and out_vlan == -1 is true). */
- struct ofbundle *out; /* Output port or NULL. */
- int out_vlan; /* Output VLAN or -1. */
- mirror_mask_t dup_mirrors; /* Bitmap of mirrors with the same output. */
-
- /* Counters. */
- int64_t packet_count; /* Number of packets sent. */
- int64_t byte_count; /* Number of bytes sent. */
-};
-
static void mirror_destroy(struct ofmirror *);
static void update_mirror_stats(struct ofproto_dpif *ofproto,
mirror_mask_t mirrors,
uint64_t packets, uint64_t bytes);
-struct ofbundle {
- struct hmap_node hmap_node; /* In struct ofproto's "bundles" hmap. */
- struct ofproto_dpif *ofproto; /* Owning ofproto. */
- void *aux; /* Key supplied by ofproto's client. */
- char *name; /* Identifier for log messages. */
-
- /* Configuration. */
- struct list ports; /* Contains "struct ofport"s. */
- enum port_vlan_mode vlan_mode; /* VLAN mode */
- int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
- unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
- * NULL if all VLANs are trunked. */
- struct lacp *lacp; /* LACP if LACP is enabled, otherwise NULL. */
- struct bond *bond; /* Nonnull iff more than one port. */
- bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
-
- /* Status. */
- bool floodable; /* True if no port has OFPUTIL_PC_NO_FLOOD set. */
-
- /* Port mirroring info. */
- mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */
- mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */
- mirror_mask_t mirror_out; /* Mirrors that output to this bundle. */
-};
-
static void bundle_remove(struct ofport *);
static void bundle_update(struct ofbundle *);
static void bundle_destroy(struct ofbundle *);
static void bundle_del_port(struct ofport_dpif *);
static void bundle_run(struct ofbundle *);
static void bundle_wait(struct ofbundle *);
-static struct ofbundle *lookup_input_bundle(const struct ofproto_dpif *,
- uint16_t in_port, bool warn,
- struct ofport_dpif **in_ofportp);
-
-/* A controller may use OFPP_NONE as the ingress port to indicate that
- * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
- * when an input bundle is needed for validation (e.g., mirroring or
- * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
- * any 'port' structs, so care must be taken when dealing with it. */
-static struct ofbundle ofpp_none_bundle = {
- .name = "OFPP_NONE",
- .vlan_mode = PORT_VLAN_TRUNK
-};
static void stp_run(struct ofproto_dpif *ofproto);
static void stp_wait(struct ofproto_dpif *ofproto);
static int set_stp_port(struct ofport *,
const struct ofproto_port_stp_settings *);
-static bool ofbundle_includes_vlan(const struct ofbundle *, uint16_t vlan);
-
-struct xlate_ctx;
-
-struct xlate_out {
- /* Wildcards relevant in translation. Any fields that were used to
- * calculate the action must be set for caching and kernel
- * wildcarding to work. For example, if the flow lookup involved
- * performing the "normal" action on IPv4 and ARP packets, 'wc'
- * would have the 'in_port' (always set), 'dl_type' (flow match),
- * 'vlan_tci' (normal action), and 'dl_dst' (normal action) fields
- * set. */
- struct flow_wildcards wc;
-
- tag_type tags; /* Tags associated with actions. */
- enum slow_path_reason slow; /* 0 if fast path may be used. */
- bool has_learn; /* Actions include NXAST_LEARN? */
- bool has_normal; /* Actions output to OFPP_NORMAL? */
- bool has_fin_timeout; /* Actions include NXAST_FIN_TIMEOUT? */
- uint16_t nf_output_iface; /* Output interface index for NetFlow. */
- mirror_mask_t mirrors; /* Bitmap of associated mirrors. */
-
- uint64_t odp_actions_stub[256 / 8];
- struct ofpbuf odp_actions;
-};
-
-struct xlate_in {
- struct ofproto_dpif *ofproto;
-
- /* Flow to which the OpenFlow actions apply. xlate_actions() will modify
- * this flow when actions change header fields. */
- struct flow flow;
-
- /* The packet corresponding to 'flow', or a null pointer if we are
- * revalidating without a packet to refer to. */
- const struct ofpbuf *packet;
-
- /* Should OFPP_NORMAL update the MAC learning table? Should "learn"
- * actions update the flow table?
- *
- * We want to update these tables if we are actually processing a packet,
- * or if we are accounting for packets that the datapath has processed, but
- * not if we are just revalidating. */
- bool may_learn;
-
- /* The rule initiating translation or NULL. */
- struct rule_dpif *rule;
-
- /* The actions to translate. If 'rule' is not NULL, these may be NULL. */
- const struct ofpact *ofpacts;
- size_t ofpacts_len;
-
- /* Union of the set of TCP flags seen so far in this flow. (Used only by
- * NXAST_FIN_TIMEOUT. Set to zero to avoid updating updating rules'
- * timeouts.) */
- uint8_t tcp_flags;
-
- /* If nonnull, flow translation calls this function just before executing a
- * resubmit or OFPP_TABLE action. In addition, disables logging of traces
- * when the recursion depth is exceeded.
- *
- * 'rule' is the rule being submitted into. It will be null if the
- * resubmit or OFPP_TABLE action didn't find a matching rule.
- *
- * This is normally null so the client has to set it manually after
- * calling xlate_in_init(). */
- void (*resubmit_hook)(struct xlate_ctx *, struct rule_dpif *rule);
-
- /* If nonnull, flow translation calls this function to report some
- * significant decision, e.g. to explain why OFPP_NORMAL translation
- * dropped a packet. */
- void (*report_hook)(struct xlate_ctx *, const char *s);
-
- /* If nonnull, flow translation credits the specified statistics to each
- * rule reached through a resubmit or OFPP_TABLE action.
- *
- * This is normally null so the client has to set it manually after
- * calling xlate_in_init(). */
- const struct dpif_flow_stats *resubmit_stats;
-};
-
-/* Context used by xlate_actions() and its callees. */
-struct xlate_ctx {
- struct xlate_in *xin;
- struct xlate_out *xout;
-
- struct ofproto_dpif *ofproto;
-
- /* Flow at the last commit. */
- struct flow base_flow;
-
- /* Tunnel IP destination address as received. This is stored separately
- * as the base_flow.tunnel is cleared on init to reflect the datapath
- * behavior. Used to make sure not to send tunneled output to ourselves,
- * which might lead to an infinite loop. This could happen easily
- * if a tunnel is marked as 'ip_remote=flow', and the flow does not
- * actually set the tun_dst field. */
- ovs_be32 orig_tunnel_ip_dst;
-
- /* Stack for the push and pop actions. Each stack element is of type
- * "union mf_subvalue". */
- union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)];
- struct ofpbuf stack;
-
- /* The rule that we are currently translating, or NULL. */
- struct rule_dpif *rule;
-
- int recurse; /* Recursion level, via xlate_table_action. */
- bool max_resubmit_trigger; /* Recursed too deeply during translation. */
- uint32_t orig_skb_priority; /* Priority when packet arrived. */
- uint8_t table_id; /* OpenFlow table ID where flow was found. */
- uint32_t sflow_n_outputs; /* Number of output ports. */
- uint32_t sflow_odp_port; /* Output port for composing sFlow action. */
- uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
- bool exit; /* No further actions should be processed. */
-};
-
-static void xlate_in_init(struct xlate_in *, struct ofproto_dpif *,
- const struct flow *, struct rule_dpif *,
- uint8_t tcp_flags, const struct ofpbuf *);
-
-static void xlate_out_uninit(struct xlate_out *);
-
-static void xlate_actions(struct xlate_in *, struct xlate_out *);
-
-static void xlate_actions_for_side_effects(struct xlate_in *);
-
-static void xlate_table_action(struct xlate_ctx *, uint16_t in_port,
- uint8_t table_id, bool may_packet_in);
-
-static size_t put_userspace_action(const struct ofproto_dpif *,
- struct ofpbuf *odp_actions,
- const struct flow *,
- const union user_action_cookie *,
- const size_t);
-
static void compose_slow_path(const struct ofproto_dpif *, const struct flow *,
enum slow_path_reason,
uint64_t *stub, size_t stub_size,
const struct nlattr **actionsp,
size_t *actions_lenp);
-static void xlate_report(struct xlate_ctx *ctx, const char *s);
-
-static void xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src);
-
/* A subfacet (see "struct subfacet" below) has three possible installation
* states:
*
static bool facet_is_controller_flow(struct facet *);
-struct ofport_dpif {
- struct hmap_node odp_port_node; /* In dpif_backer's "odp_to_ofport_map". */
- struct ofport up;
-
- uint32_t odp_port;
- struct ofbundle *bundle; /* Bundle that contains this port, if any. */
- struct list bundle_node; /* In struct ofbundle's "ports" list. */
- struct cfm *cfm; /* Connectivity Fault Management, if any. */
- struct bfd *bfd; /* BFD, if any. */
- tag_type tag; /* Tag associated with this port. */
- bool may_enable; /* May be enabled in bonds. */
- long long int carrier_seq; /* Carrier status changes. */
- struct tnl_port *tnl_port; /* Tunnel handle, or null. */
-
- /* Spanning tree. */
- struct stp_port *stp_port; /* Spanning Tree Protocol, if any. */
- enum stp_state stp_state; /* Always STP_DISABLED if STP not in use. */
- long long int stp_state_entered;
-
- struct hmap priorities; /* Map of attached 'priority_to_dscp's. */
-
- /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
- *
- * This is deprecated. It is only for compatibility with broken device
- * drivers in old versions of Linux that do not properly support VLANs when
- * VLAN devices are not used. When broken device drivers are no longer in
- * widespread use, we will delete these interfaces. */
- uint16_t realdev_ofp_port;
- int vlandev_vid;
-};
-
-/* Node in 'ofport_dpif''s 'priorities' map. Used to maintain a map from
- * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
- * traffic egressing the 'ofport' with that priority should be marked with. */
-struct priority_to_dscp {
- struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'priorities' map. */
- uint32_t priority; /* Priority of this queue (see struct flow). */
-
- uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
-};
-
/* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
*
* This is deprecated. It is only for compatibility with broken device drivers
int vid;
};
-static uint16_t vsp_realdev_to_vlandev(const struct ofproto_dpif *,
- uint16_t realdev_ofp_port,
- ovs_be16 vlan_tci);
static bool vsp_adjust_flow(const struct ofproto_dpif *, struct flow *);
static void vsp_remove(struct ofport_dpif *);
static void vsp_add(struct ofport_dpif *, uint16_t realdev_ofp_port, int vid);
-static uint32_t ofp_port_to_odp_port(const struct ofproto_dpif *,
- uint16_t ofp_port);
static uint16_t odp_port_to_ofp_port(const struct ofproto_dpif *,
uint32_t odp_port);
struct ofoperation *op;
};
-/* Extra information about a classifier table.
- * Currently used just for optimized flow revalidation. */
-struct table_dpif {
- /* If either of these is nonnull, then this table has a form that allows
- * flows to be tagged to avoid revalidating most flows for the most common
- * kinds of flow table changes. */
- struct cls_table *catchall_table; /* Table that wildcards all fields. */
- struct cls_table *other_table; /* Table with any other wildcard set. */
- uint32_t basis; /* Keeps each table's tags separate. */
-};
-
-/* Reasons that we might need to revalidate every facet, and corresponding
- * coverage counters.
- *
- * A value of 0 means that there is no need to revalidate.
- *
- * It would be nice to have some cleaner way to integrate with coverage
- * counters, but with only a few reasons I guess this is good enough for
- * now. */
-enum revalidate_reason {
- REV_RECONFIGURE = 1, /* Switch configuration changed. */
- REV_STP, /* Spanning tree protocol port status change. */
- REV_PORT_TOGGLED, /* Port enabled or disabled by CFM, LACP, ...*/
- REV_FLOW_TABLE, /* Flow table changed. */
- REV_INCONSISTENCY /* Facet self-check failed. */
-};
COVERAGE_DEFINE(rev_reconfigure);
COVERAGE_DEFINE(rev_stp);
COVERAGE_DEFINE(rev_port_toggled);
size_t key_len;
};
-struct avg_subfacet_rates {
- double add_rate; /* Moving average of new flows created per minute. */
- double del_rate; /* Moving average of flows deleted per minute. */
-};
-
-/* All datapaths of a given type share a single dpif backer instance. */
-struct dpif_backer {
- char *type;
- int refcount;
- struct dpif *dpif;
- struct timer next_expiration;
- struct hmap odp_to_ofport_map; /* ODP port to ofport mapping. */
-
- struct simap tnl_backers; /* Set of dpif ports backing tunnels. */
-
- /* Facet revalidation flags applying to facets which use this backer. */
- enum revalidate_reason need_revalidate; /* Revalidate every facet. */
- struct tag_set revalidate_set; /* Revalidate only matching facets. */
-
- struct hmap drop_keys; /* Set of dropped odp keys. */
- bool recv_set_enable; /* Enables or disables receiving packets. */
-
- struct hmap subfacets;
- struct governor *governor;
-
- /* Subfacet statistics.
- *
- * These keep track of the total number of subfacets added and deleted and
- * flow life span. They are useful for computing the flow rates stats
- * exposed via "ovs-appctl dpif/show". The goal is to learn about
- * traffic patterns in ways that we can use later to improve Open vSwitch
- * performance in new situations. */
- long long int created; /* Time when it is created. */
- unsigned max_n_subfacet; /* Maximum number of flows */
- unsigned avg_n_subfacet; /* Average number of flows. */
- long long int avg_subfacet_life; /* Average life span of subfacets. */
-
- /* The average number of subfacets... */
- struct avg_subfacet_rates hourly; /* ...over the last hour. */
- struct avg_subfacet_rates daily; /* ...over the last day. */
- struct avg_subfacet_rates lifetime; /* ...over the switch lifetime. */
- long long int last_minute; /* Last time 'hourly' was updated. */
-
- /* Number of subfacets added or deleted since 'last_minute'. */
- unsigned subfacet_add_count;
- unsigned subfacet_del_count;
-
- /* Number of subfacets added or deleted from 'created' to 'last_minute.' */
- unsigned long long int total_subfacet_add_count;
- unsigned long long int total_subfacet_del_count;
-};
-
/* All existing ofproto_backer instances, indexed by ofproto->up.type. */
static struct shash all_dpif_backers = SHASH_INITIALIZER(&all_dpif_backers);
odp_port_to_ofport(const struct dpif_backer *, uint32_t odp_port);
static void update_moving_averages(struct dpif_backer *backer);
-struct ofproto_dpif {
- struct hmap_node all_ofproto_dpifs_node; /* In 'all_ofproto_dpifs'. */
- struct ofproto up;
- struct dpif_backer *backer;
-
- /* Special OpenFlow rules. */
- struct rule_dpif *miss_rule; /* Sends flow table misses to controller. */
- struct rule_dpif *no_packet_in_rule; /* Drops flow table misses. */
- struct rule_dpif *drop_frags_rule; /* Used in OFPC_FRAG_DROP mode. */
-
- /* Bridging. */
- struct netflow *netflow;
- struct dpif_sflow *sflow;
- struct dpif_ipfix *ipfix;
- struct hmap bundles; /* Contains "struct ofbundle"s. */
- struct mac_learning *ml;
- struct ofmirror *mirrors[MAX_MIRRORS];
- bool has_mirrors;
- bool has_bonded_bundles;
-
- /* Facets. */
- struct classifier facets; /* Contains 'struct facet's. */
- long long int consistency_rl;
-
- /* Revalidation. */
- struct table_dpif tables[N_TABLES];
-
- /* Support for debugging async flow mods. */
- struct list completions;
-
- bool has_bundle_action; /* True when the first bundle action appears. */
- struct netdev_stats stats; /* To account packets generated and consumed in
- * userspace. */
-
- /* Spanning tree. */
- struct stp *stp;
- long long int stp_last_tick;
-
- /* VLAN splinters. */
- struct hmap realdev_vid_map; /* (realdev,vid) -> vlandev. */
- struct hmap vlandev_map; /* vlandev -> (realdev,vid). */
-
- /* Ports. */
- struct sset ports; /* Set of standard port names. */
- struct sset ghost_ports; /* Ports with no datapath port. */
- struct sset port_poll_set; /* Queued names for port_poll() reply. */
- int port_poll_errno; /* Last errno for port_poll() reply. */
-
- /* Per ofproto's dpif stats. */
- uint64_t n_hit;
- uint64_t n_missed;
-};
-
/* Defer flow mod completion until "ovs-appctl ofproto/unclog"? (Useful only
* for debugging the asynchronous flow_mod implementation.) */
static bool clogged;
static void ofproto_dpif_unixctl_init(void);
-static struct ofproto_dpif *
-ofproto_dpif_cast(const struct ofproto *ofproto)
-{
- ovs_assert(ofproto->ofproto_class == &ofproto_dpif_class);
- return CONTAINER_OF(ofproto, struct ofproto_dpif, up);
-}
-
-static struct ofport_dpif *get_ofp_port(const struct ofproto_dpif *,
- uint16_t ofp_port);
-static struct ofport_dpif *get_odp_port(const struct ofproto_dpif *,
- uint32_t odp_port);
-static void ofproto_trace(struct ofproto_dpif *, const struct flow *,
- const struct ofpbuf *, struct ds *);
-
-/* Packet processing. */
-static void update_learning_table(struct ofproto_dpif *, const struct flow *,
- struct flow_wildcards *, int vlan,
- struct ofbundle *);
/* Upcalls. */
#define FLOW_MISS_MAX_BATCH 50
static int handle_upcalls(struct dpif_backer *, unsigned int max_batch);
/* Utilities. */
static int send_packet(const struct ofport_dpif *, struct ofpbuf *packet);
-static size_t compose_sflow_action(const struct ofproto_dpif *,
- struct ofpbuf *odp_actions,
- const struct flow *, uint32_t odp_port);
-static void compose_ipfix_action(const struct ofproto_dpif *,
- struct ofpbuf *odp_actions,
- const struct flow *);
-static void add_mirror_actions(struct xlate_ctx *ctx,
- const struct flow *flow);
+
/* Global variables. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
return error;
}
- *rulep = rule_dpif_lookup__(ofproto, &fm.match.flow, NULL, TBL_INTERNAL);
+ *rulep = rule_dpif_lookup_in_table(ofproto, &fm.match.flow, NULL,
+ TBL_INTERNAL);
ovs_assert(*rulep != NULL);
return 0;
}
}
\f
-static struct priority_to_dscp *
+struct priority_to_dscp *
get_priority(const struct ofport_dpif *ofport, uint32_t priority)
{
struct priority_to_dscp *pdscp;
\f
/* Ports. */
-static struct ofport_dpif *
+struct ofport_dpif *
get_ofp_port(const struct ofproto_dpif *ofproto, uint16_t ofp_port)
{
struct ofport *ofport = ofproto_get_port(&ofproto->up, ofp_port);
return ofport ? ofport_dpif_cast(ofport) : NULL;
}
-static struct ofport_dpif *
+struct ofport_dpif *
get_odp_port(const struct ofproto_dpif *ofproto, uint32_t odp_port)
{
struct ofport_dpif *port = odp_port_to_ofport(ofproto->backer, odp_port);
ofproto_port->ofp_port = odp_port_to_ofp_port(ofproto, dpif_port->port_no);
}
-static struct ofport_dpif *
+struct ofport_dpif *
ofport_get_peer(const struct ofport_dpif *ofport_dpif)
{
const struct ofproto_dpif *ofproto;
connmgr_send_packet_in(ofproto->up.connmgr, &pin);
}
-static enum slow_path_reason
+enum slow_path_reason
process_special(struct ofproto_dpif *ofproto, const struct flow *flow,
const struct ofport_dpif *ofport, const struct ofpbuf *packet)
{
push_all_stats__(true);
}
-static void
+void
rule_credit_stats(struct rule_dpif *rule, const struct dpif_flow_stats *stats)
{
rule->packet_count += stats->n_packets;
{
struct rule_dpif *rule;
- rule = rule_dpif_lookup__(ofproto, flow, wc, 0);
+ rule = rule_dpif_lookup_in_table(ofproto, flow, wc, 0);
if (rule) {
return rule;
}
return rule_dpif_miss_rule(ofproto, flow);
}
-static struct rule_dpif *
-rule_dpif_lookup__(struct ofproto_dpif *ofproto, const struct flow *flow,
- struct flow_wildcards *wc, uint8_t table_id)
+struct rule_dpif *
+rule_dpif_lookup_in_table(struct ofproto_dpif *ofproto,
+ const struct flow *flow, struct flow_wildcards *wc,
+ uint8_t table_id)
{
struct cls_rule *cls_rule;
struct classifier *cls;
return rule_dpif_cast(rule_from_cls_rule(cls_rule));
}
-static struct rule_dpif *
+struct rule_dpif *
rule_dpif_miss_rule(struct ofproto_dpif *ofproto, const struct flow *flow)
{
struct ofport_dpif *port;
ofproto->stats.tx_bytes += packet->size;
return error;
}
-\f
-/* OpenFlow to datapath action translation. */
-
-static bool may_receive(const struct ofport_dpif *, struct xlate_ctx *);
-static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
- struct xlate_ctx *);
-static void xlate_normal(struct xlate_ctx *);
/* Composes an ODP action for a "slow path" action for 'flow' within 'ofproto'.
* The action will state 'slow' as the reason that the action is in the slow
*actions_lenp = buf.size;
}
-static size_t
+size_t
put_userspace_action(const struct ofproto_dpif *ofproto,
struct ofpbuf *odp_actions,
const struct flow *flow,
return odp_put_userspace_action(pid, cookie, cookie_size, odp_actions);
}
-/* Compose SAMPLE action for sFlow or IPFIX. The given probability is
- * the number of packets out of UINT32_MAX to sample. The given
- * cookie is passed back in the callback for each sampled packet.
- */
-static size_t
-compose_sample_action(const struct ofproto_dpif *ofproto,
- struct ofpbuf *odp_actions,
- const struct flow *flow,
- const uint32_t probability,
- const union user_action_cookie *cookie,
- const size_t cookie_size)
+
+static void
+update_mirror_stats(struct ofproto_dpif *ofproto, mirror_mask_t mirrors,
+ uint64_t packets, uint64_t bytes)
{
- size_t sample_offset, actions_offset;
- int cookie_offset;
+ if (!mirrors) {
+ return;
+ }
- sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
+ 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;
+ }
- nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
+ m->packet_count += packets;
+ m->byte_count += bytes;
+ }
+}
- actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
- cookie_offset = put_userspace_action(ofproto, odp_actions, flow, cookie,
- cookie_size);
+\f
+/* Optimized flow revalidation.
+ *
+ * It's a difficult problem, in general, to tell which facets need to have
+ * their actions recalculated whenever the OpenFlow flow table changes. We
+ * don't try to solve that general problem: for most kinds of OpenFlow flow
+ * table changes, we recalculate the actions for every facet. This is
+ * relatively expensive, but it's good enough if the OpenFlow flow table
+ * doesn't change very often.
+ *
+ * However, we can expect one particular kind of OpenFlow flow table change to
+ * happen frequently: changes caused by MAC learning. To avoid wasting a lot
+ * of CPU on revalidating every facet whenever MAC learning modifies the flow
+ * table, we add a special case that applies to flow tables in which every rule
+ * has the same form (that is, the same wildcards), except that the table is
+ * also allowed to have a single "catch-all" flow that matches all packets. We
+ * optimize this case by tagging all of the facets that resubmit into the table
+ * and invalidating the same tag whenever a flow changes in that table. The
+ * end result is that we revalidate just the facets that need it (and sometimes
+ * a few more, but not all of the facets or even all of the facets that
+ * resubmit to the table modified by MAC learning). */
- nl_msg_end_nested(odp_actions, actions_offset);
- nl_msg_end_nested(odp_actions, sample_offset);
- return cookie_offset;
+/* Calculates the tag to use for 'flow' and mask 'mask' when it is inserted
+ * into an OpenFlow table with the given 'basis'. */
+tag_type
+rule_calculate_tag(const struct flow *flow, const struct minimask *mask,
+ uint32_t secret)
+{
+ if (minimask_is_catchall(mask)) {
+ return 0;
+ } else {
+ uint32_t hash = flow_hash_in_minimask(flow, mask, secret);
+ return tag_create_deterministic(hash);
+ }
}
+/* Following a change to OpenFlow table 'table_id' in 'ofproto', update the
+ * taggability of that table.
+ *
+ * This function must be called after *each* change to a flow table. If you
+ * skip calling it on some changes then the pointer comparisons at the end can
+ * be invalid if you get unlucky. For example, if a flow removal causes a
+ * cls_table to be destroyed and then a flow insertion causes a cls_table with
+ * different wildcards to be created with the same address, then this function
+ * will incorrectly skip revalidation. */
static void
-compose_sflow_cookie(const struct ofproto_dpif *ofproto,
- ovs_be16 vlan_tci, uint32_t odp_port,
- unsigned int n_outputs, union user_action_cookie *cookie)
+table_update_taggable(struct ofproto_dpif *ofproto, uint8_t table_id)
{
- int ifindex;
+ struct table_dpif *table = &ofproto->tables[table_id];
+ const struct oftable *oftable = &ofproto->up.tables[table_id];
+ struct cls_table *catchall, *other;
+ struct cls_table *t;
- cookie->type = USER_ACTION_COOKIE_SFLOW;
- cookie->sflow.vlan_tci = vlan_tci;
+ catchall = other = NULL;
- /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
- * port information") for the interpretation of cookie->output. */
- switch (n_outputs) {
+ switch (hmap_count(&oftable->cls.tables)) {
case 0:
- /* 0x40000000 | 256 means "packet dropped for unknown reason". */
- cookie->sflow.output = 0x40000000 | 256;
+ /* We could tag this OpenFlow table but it would make the logic a
+ * little harder and it's a corner case that doesn't seem worth it
+ * yet. */
break;
case 1:
- ifindex = dpif_sflow_odp_port_to_ifindex(ofproto->sflow, odp_port);
- if (ifindex) {
- cookie->sflow.output = ifindex;
- break;
+ case 2:
+ HMAP_FOR_EACH (t, hmap_node, &oftable->cls.tables) {
+ if (cls_table_is_catchall(t)) {
+ catchall = t;
+ } else if (!other) {
+ other = t;
+ } else {
+ /* Indicate that we can't tag this by setting both tables to
+ * NULL. (We know that 'catchall' is already NULL.) */
+ other = NULL;
+ }
}
- /* Fall through. */
+ break;
+
default:
- /* 0x80000000 means "multiple output ports. */
- cookie->sflow.output = 0x80000000 | n_outputs;
+ /* Can't tag this table. */
break;
}
-}
-
-/* Compose SAMPLE action for sFlow bridge sampling. */
-static size_t
-compose_sflow_action(const struct ofproto_dpif *ofproto,
- struct ofpbuf *odp_actions,
- const struct flow *flow,
- uint32_t odp_port)
-{
- uint32_t probability;
- union user_action_cookie cookie;
- if (!ofproto->sflow || flow->in_port == OFPP_NONE) {
- return 0;
+ if (table->catchall_table != catchall || table->other_table != other) {
+ table->catchall_table = catchall;
+ table->other_table = other;
+ ofproto->backer->need_revalidate = REV_FLOW_TABLE;
}
-
- probability = dpif_sflow_get_probability(ofproto->sflow);
- compose_sflow_cookie(ofproto, htons(0), odp_port,
- odp_port == OVSP_NONE ? 0 : 1, &cookie);
-
- return compose_sample_action(ofproto, odp_actions, flow, probability,
- &cookie, sizeof cookie.sflow);
}
+/* Given 'rule' that has changed in some way (either it is a rule being
+ * inserted, a rule being deleted, or a rule whose actions are being
+ * modified), marks facets for revalidation to ensure that packets will be
+ * forwarded correctly according to the new state of the flow table.
+ *
+ * This function must be called after *each* change to a flow table. See
+ * the comment on table_update_taggable() for more information. */
static void
-compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
- uint32_t obs_domain_id, uint32_t obs_point_id,
- union user_action_cookie *cookie)
+rule_invalidate(const struct rule_dpif *rule)
{
- cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
- cookie->flow_sample.probability = probability;
- cookie->flow_sample.collector_set_id = collector_set_id;
- cookie->flow_sample.obs_domain_id = obs_domain_id;
- cookie->flow_sample.obs_point_id = obs_point_id;
-}
+ struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
-static void
-compose_ipfix_cookie(union user_action_cookie *cookie)
-{
- cookie->type = USER_ACTION_COOKIE_IPFIX;
-}
+ table_update_taggable(ofproto, rule->up.table_id);
-/* Compose SAMPLE action for IPFIX bridge sampling. */
-static void
-compose_ipfix_action(const struct ofproto_dpif *ofproto,
- struct ofpbuf *odp_actions,
- const struct flow *flow)
-{
- uint32_t probability;
- union user_action_cookie cookie;
+ if (!ofproto->backer->need_revalidate) {
+ struct table_dpif *table = &ofproto->tables[rule->up.table_id];
- if (!ofproto->ipfix || flow->in_port == OFPP_NONE) {
- return;
+ if (table->other_table && rule->tag) {
+ tag_set_add(&ofproto->backer->revalidate_set, rule->tag);
+ } else {
+ ofproto->backer->need_revalidate = REV_FLOW_TABLE;
+ }
}
-
- probability = dpif_ipfix_get_bridge_exporter_probability(ofproto->ipfix);
- compose_ipfix_cookie(&cookie);
-
- compose_sample_action(ofproto, odp_actions, flow, probability,
- &cookie, sizeof cookie.ipfix);
-}
-
-/* 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 xlate_ctx *ctx)
-{
- ctx->user_cookie_offset = compose_sflow_action(ctx->ofproto,
- &ctx->xout->odp_actions,
- &ctx->xin->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 xlate_ctx *ctx)
-{
- compose_ipfix_action(ctx->ofproto, &ctx->xout->odp_actions,
- &ctx->xin->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 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->xout->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 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->xin->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->xin->flow.in_port = peer->up.ofp_port;
- ctx->xin->flow.metadata = htonll(0);
- memset(&ctx->xin->flow.tunnel, 0, sizeof ctx->xin->flow.tunnel);
- memset(ctx->xin->flow.regs, 0, sizeof ctx->xin->flow.regs);
-
- in_port = get_ofp_port(ctx->ofproto, ctx->xin->flow.in_port);
- special = process_special(ctx->ofproto, &ctx->xin->flow, in_port,
- ctx->xin->packet);
- if (special) {
- ctx->xout->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->xin->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->xout->odp_actions.size;
- xlate_table_action(ctx, ctx->xin->flow.in_port, 0, true);
- ctx->base_flow = old_base_flow;
- ctx->xout->odp_actions.size = old_size;
- }
- }
-
- ctx->xin->flow = old_flow;
- ctx->ofproto = ofproto_dpif_cast(ofport->up.ofproto);
-
- if (ctx->xin->resubmit_stats) {
- netdev_vport_inc_tx(ofport->up.netdev, ctx->xin->resubmit_stats);
- netdev_vport_inc_rx(peer->up.netdev, ctx->xin->resubmit_stats);
- }
-
- return;
- }
-
- flow_vlan_tci = ctx->xin->flow.vlan_tci;
- flow_skb_mark = ctx->xin->flow.skb_mark;
- flow_nw_tos = ctx->xin->flow.nw_tos;
-
- pdscp = get_priority(ofport, ctx->xin->flow.skb_priority);
- if (pdscp) {
- ctx->xin->flow.nw_tos &= ~IP_DSCP_MASK;
- ctx->xin->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->xin->flow.tunnel;
- odp_port = tnl_port_send(ofport->tnl_port, &ctx->xin->flow);
- if (odp_port == OVSP_NONE) {
- xlate_report(ctx, "Tunneling decided against output");
- goto out; /* restore flow_nw_tos */
- }
- if (ctx->xin->flow.tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
- xlate_report(ctx, "Not tunneling to our own address");
- goto out; /* restore flow_nw_tos */
- }
- if (ctx->xin->resubmit_stats) {
- netdev_vport_inc_tx(ofport->up.netdev, ctx->xin->resubmit_stats);
- }
- out_port = odp_port;
- commit_odp_tunnel_action(&ctx->xin->flow, &ctx->base_flow,
- &ctx->xout->odp_actions);
- ctx->xin->flow.tunnel = flow_tnl; /* Restore tunnel metadata */
- } else {
- uint16_t vlandev_port;
- odp_port = ofport->odp_port;
- vlandev_port = vsp_realdev_to_vlandev(ctx->ofproto, ofp_port,
- ctx->xin->flow.vlan_tci);
- if (vlandev_port == ofp_port) {
- out_port = odp_port;
- } else {
- out_port = ofp_port_to_odp_port(ctx->ofproto, vlandev_port);
- ctx->xin->flow.vlan_tci = htons(0);
- }
- ctx->xin->flow.skb_mark &= ~IPSEC_MARK;
- }
- commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
- &ctx->xout->odp_actions);
- nl_msg_put_u32(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, out_port);
-
- ctx->sflow_odp_port = odp_port;
- ctx->sflow_n_outputs++;
- ctx->xout->nf_output_iface = ofp_port;
-
- /* Restore flow */
- ctx->xin->flow.vlan_tci = flow_vlan_tci;
- ctx->xin->flow.skb_mark = flow_skb_mark;
- out:
- ctx->xin->flow.nw_tos = flow_nw_tos;
-}
-
-static void
-compose_output_action(struct xlate_ctx *ctx, uint16_t ofp_port)
-{
- compose_output_action__(ctx, ofp_port, true);
-}
-
-static void
-tag_the_flow(struct 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->xout->tags |= (rule && rule->tag
- ? rule->tag
- : rule_calculate_tag(&ctx->xin->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 xlate_ctx *ctx, struct rule_dpif *rule,
- bool may_packet_in)
-{
- if (ctx->xin->resubmit_hook) {
- ctx->xin->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->xin->flow);
- }
- if (rule && ctx->xin->resubmit_stats) {
- rule_credit_stats(rule, ctx->xin->resubmit_stats);
- }
- return rule;
-}
-
-static void
-xlate_table_action(struct 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->xin->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->xin->flow.in_port = in_port;
- rule = rule_dpif_lookup__(ctx->ofproto, &ctx->xin->flow,
- &ctx->xout->wc, table_id);
-
- tag_the_flow(ctx, rule);
-
- /* Restore the original input port. Otherwise OFPP_NORMAL and
- * OFPP_IN_PORT will have surprising behavior. */
- ctx->xin->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 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->xin->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 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->xin->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->xout->nf_output_iface = NF_OUT_FLOOD;
-}
-
-static void
-execute_controller_action(struct xlate_ctx *ctx, int len,
- enum ofp_packet_in_reason reason,
- uint16_t controller_id)
-{
- struct ofputil_packet_in pin;
- struct ofpbuf *packet;
- struct flow key;
-
- ovs_assert(!ctx->xout->slow || ctx->xout->slow == SLOW_CONTROLLER);
- ctx->xout->slow = SLOW_CONTROLLER;
- if (!ctx->xin->packet) {
- return;
- }
-
- packet = ofpbuf_clone(ctx->xin->packet);
-
- key.skb_priority = 0;
- key.skb_mark = 0;
- memset(&key.tunnel, 0, sizeof key.tunnel);
-
- commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
- &ctx->xout->odp_actions);
-
- odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data,
- ctx->xout->odp_actions.size, NULL, NULL);
-
- 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->xin->flow, &pin.fmd);
-
- connmgr_send_packet_in(ctx->ofproto->up.connmgr, &pin);
- ofpbuf_delete(packet);
-}
-
-static void
-execute_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
-{
- ovs_assert(eth_type_mpls(eth_type));
-
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- memset(&ctx->xout->wc.masks.mpls_lse, 0xff,
- sizeof ctx->xout->wc.masks.mpls_lse);
- memset(&ctx->xout->wc.masks.mpls_depth, 0xff,
- sizeof ctx->xout->wc.masks.mpls_depth);
-
- if (ctx->base_flow.mpls_depth) {
- ctx->xin->flow.mpls_lse &= ~htonl(MPLS_BOS_MASK);
- ctx->xin->flow.mpls_depth++;
- } else {
- ovs_be32 label;
- uint8_t tc, ttl;
-
- if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IPV6)) {
- label = htonl(0x2); /* IPV6 Explicit Null. */
- } else {
- label = htonl(0x0); /* IPV4 Explicit Null. */
- }
- tc = (ctx->xin->flow.nw_tos & IP_DSCP_MASK) >> 2;
- ttl = ctx->xin->flow.nw_ttl ? ctx->xin->flow.nw_ttl : 0x40;
- ctx->xin->flow.mpls_lse = set_mpls_lse_values(ttl, tc, 1, label);
- ctx->xin->flow.mpls_depth = 1;
- }
- ctx->xin->flow.dl_type = eth_type;
-}
-
-static void
-execute_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
-{
- ovs_assert(eth_type_mpls(ctx->xin->flow.dl_type));
- ovs_assert(!eth_type_mpls(eth_type));
-
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- memset(&ctx->xout->wc.masks.mpls_lse, 0xff,
- sizeof ctx->xout->wc.masks.mpls_lse);
- memset(&ctx->xout->wc.masks.mpls_depth, 0xff,
- sizeof ctx->xout->wc.masks.mpls_depth);
-
- if (ctx->xin->flow.mpls_depth) {
- ctx->xin->flow.mpls_depth--;
- ctx->xin->flow.mpls_lse = htonl(0);
- if (!ctx->xin->flow.mpls_depth) {
- ctx->xin->flow.dl_type = eth_type;
- }
- }
-}
-
-static bool
-compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
-{
- if (ctx->xin->flow.dl_type != htons(ETH_TYPE_IP) &&
- ctx->xin->flow.dl_type != htons(ETH_TYPE_IPV6)) {
- return false;
- }
-
- if (ctx->xin->flow.nw_ttl > 1) {
- ctx->xin->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 xlate_ctx *ctx, uint8_t ttl)
-{
- if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
- return true;
- }
-
- set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl);
- return false;
-}
-
-static bool
-execute_dec_mpls_ttl_action(struct xlate_ctx *ctx)
-{
- uint8_t ttl = mpls_lse_to_ttl(ctx->xin->flow.mpls_lse);
-
- if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
- return false;
- }
-
- if (ttl > 1) {
- ttl--;
- set_mpls_lse_ttl(&ctx->xin->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 xlate_ctx *ctx,
- uint16_t port, uint16_t max_len, bool may_packet_in)
-{
- uint16_t prev_nf_output_iface = ctx->xout->nf_output_iface;
-
- ctx->xout->nf_output_iface = NF_OUT_DROP;
-
- switch (port) {
- case OFPP_IN_PORT:
- compose_output_action(ctx, ctx->xin->flow.in_port);
- break;
- case OFPP_TABLE:
- xlate_table_action(ctx, ctx->xin->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->xin->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->xout->nf_output_iface = NF_OUT_FLOOD;
- } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
- ctx->xout->nf_output_iface = prev_nf_output_iface;
- } else if (prev_nf_output_iface != NF_OUT_DROP &&
- ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
- ctx->xout->nf_output_iface = NF_OUT_MULTI;
- }
-}
-
-static void
-xlate_output_reg_action(struct xlate_ctx *ctx,
- const struct ofpact_output_reg *or)
-{
- uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
- if (port <= UINT16_MAX) {
- union mf_subvalue value;
-
- memset(&value, 0xff, sizeof value);
- mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
- xlate_output_action(ctx, port, or->max_len, false);
- }
-}
-
-static void
-xlate_enqueue_action(struct 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->xin->flow.in_port;
- } else if (ofp_port == ctx->xin->flow.in_port) {
- return;
- }
-
- /* Add datapath actions. */
- flow_priority = ctx->xin->flow.skb_priority;
- ctx->xin->flow.skb_priority = priority;
- compose_output_action(ctx, ofp_port);
- ctx->xin->flow.skb_priority = flow_priority;
-
- /* Update NetFlow output port. */
- if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
- ctx->xout->nf_output_iface = ofp_port;
- } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
- ctx->xout->nf_output_iface = NF_OUT_MULTI;
- }
-}
-
-static void
-xlate_set_queue_action(struct 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->xin->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 xlate_ctx *ctx,
- const struct ofpact_bundle *bundle)
-{
- uint16_t port;
-
- port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
- slave_enabled_cb, ctx->ofproto);
- if (bundle->dst.field) {
- nxm_reg_load(&bundle->dst, port, &ctx->xin->flow);
- } else {
- xlate_output_action(ctx, port, 0, false);
- }
-}
-
-static void
-xlate_learn_action(struct 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;
-
- ctx->xout->has_learn = true;
-
- learn_mask(learn, &ctx->xout->wc);
-
- if (!ctx->xin->may_learn) {
- return;
- }
-
- ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
- learn_execute(learn, &ctx->xin->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 xlate_ctx *ctx,
- const struct ofpact_fin_timeout *oft)
-{
- if (ctx->xin->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 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->xin->flow, &ctx->base_flow,
- &ctx->xout->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->xout->odp_actions, &ctx->xin->flow,
- probability, &cookie, sizeof cookie.flow_sample);
-}
-
-static bool
-may_receive(const struct ofport_dpif *port, struct xlate_ctx *ctx)
-{
- if (port->up.pp.config & (eth_addr_equals(ctx->xin->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 xlate_ctx *ctx)
-{
- if (is_ip_any(&ctx->base_flow)
- && (ctx->xin->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->xin->flow.nw_tos |= IP_ECN_CE;
- }
- }
-
- return true;
-}
-
-static void
-do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
- struct 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->xin->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
- ctx->xin->flow.vlan_tci |=
- (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
- | htons(VLAN_CFI));
- break;
-
- case OFPACT_SET_VLAN_PCP:
- ctx->xin->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
- ctx->xin->flow.vlan_tci |=
- htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp << VLAN_PCP_SHIFT)
- | VLAN_CFI);
- break;
-
- case OFPACT_STRIP_VLAN:
- ctx->xin->flow.vlan_tci = htons(0);
- break;
-
- case OFPACT_PUSH_VLAN:
- /* XXX 802.1AD(QinQ) */
- ctx->xin->flow.vlan_tci = htons(VLAN_CFI);
- break;
-
- case OFPACT_SET_ETH_SRC:
- memcpy(ctx->xin->flow.dl_src, ofpact_get_SET_ETH_SRC(a)->mac,
- ETH_ADDR_LEN);
- break;
-
- case OFPACT_SET_ETH_DST:
- memcpy(ctx->xin->flow.dl_dst, ofpact_get_SET_ETH_DST(a)->mac,
- ETH_ADDR_LEN);
- break;
-
- case OFPACT_SET_IPV4_SRC:
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IP)) {
- ctx->xin->flow.nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
- }
- break;
-
- case OFPACT_SET_IPV4_DST:
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IP)) {
- ctx->xin->flow.nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
- }
- break;
-
- case OFPACT_SET_IPV4_DSCP:
- /* OpenFlow 1.0 only supports IPv4. */
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- if (ctx->xin->flow.dl_type == htons(ETH_TYPE_IP)) {
- ctx->xin->flow.nw_tos &= ~IP_DSCP_MASK;
- ctx->xin->flow.nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp;
- }
- break;
-
- case OFPACT_SET_L4_SRC_PORT:
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- memset(&ctx->xout->wc.masks.nw_proto, 0xff,
- sizeof ctx->xout->wc.masks.nw_proto);
- if (is_ip_any(&ctx->xin->flow)) {
- ctx->xin->flow.tp_src =
- htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
- }
- break;
-
- case OFPACT_SET_L4_DST_PORT:
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- memset(&ctx->xout->wc.masks.nw_proto, 0xff,
- sizeof ctx->xout->wc.masks.nw_proto);
- if (is_ip_any(&ctx->xin->flow)) {
- ctx->xin->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->xin->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:
- memset(&ctx->xout->wc.masks.skb_priority, 0xff,
- sizeof ctx->xout->wc.masks.skb_priority);
-
- ctx->xin->flow.skb_priority = ctx->orig_skb_priority;
- break;
-
- case OFPACT_REG_MOVE:
- nxm_execute_reg_move(ofpact_get_REG_MOVE(a), &ctx->xin->flow,
- &ctx->xout->wc);
- break;
-
- case OFPACT_REG_LOAD:
- nxm_execute_reg_load(ofpact_get_REG_LOAD(a), &ctx->xin->flow);
- break;
-
- case OFPACT_STACK_PUSH:
- nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), &ctx->xin->flow,
- &ctx->xout->wc, &ctx->stack);
- break;
-
- case OFPACT_STACK_POP:
- nxm_execute_stack_pop(ofpact_get_STACK_POP(a), &ctx->xin->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:
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- 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->xin->flow,
- &ctx->xout->wc);
- 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:
- xlate_learn_action(ctx, ofpact_get_LEARN(a));
- break;
-
- case OFPACT_EXIT:
- ctx->exit = true;
- break;
-
- case OFPACT_FIN_TIMEOUT:
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
- memset(&ctx->xout->wc.masks.nw_proto, 0xff,
- sizeof ctx->xout->wc.masks.nw_proto);
- ctx->xout->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->xin->flow.metadata &= ~metadata->mask;
- ctx->xin->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->xin->flow,
- &ctx->xout->wc, 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
-xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
- const struct flow *flow, struct rule_dpif *rule,
- uint8_t tcp_flags, const struct ofpbuf *packet)
-{
- xin->ofproto = ofproto;
- xin->flow = *flow;
- xin->packet = packet;
- xin->may_learn = packet != NULL;
- xin->rule = rule;
- xin->ofpacts = NULL;
- xin->ofpacts_len = 0;
- xin->tcp_flags = tcp_flags;
- xin->resubmit_hook = NULL;
- xin->report_hook = NULL;
- xin->resubmit_stats = NULL;
-}
-
-static void
-xlate_out_uninit(struct xlate_out *xout)
-{
- if (xout) {
- ofpbuf_uninit(&xout->odp_actions);
- }
-}
-
-/* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
- * into datapath actions in 'odp_actions', using 'ctx'. */
-static void
-xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
-{
- /* 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;
- const struct ofpact *ofpacts;
- struct ofport_dpif *in_port;
- struct flow orig_flow;
- struct xlate_ctx ctx;
- size_t ofpacts_len;
-
- COVERAGE_INC(ofproto_dpif_xlate);
-
- /* 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.xin = xin;
- ctx.xout = xout;
-
- ctx.ofproto = xin->ofproto;
- ctx.rule = xin->rule;
-
- ctx.base_flow = ctx.xin->flow;
- memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
- ctx.orig_tunnel_ip_dst = ctx.xin->flow.tunnel.ip_dst;
-
- flow_wildcards_init_catchall(&ctx.xout->wc);
- memset(&ctx.xout->wc.masks.in_port, 0xff,
- sizeof ctx.xout->wc.masks.in_port);
-
- if (tnl_port_should_receive(&ctx.xin->flow)) {
- memset(&ctx.xout->wc.masks.tunnel, 0xff,
- sizeof ctx.xout->wc.masks.tunnel);
- }
-
- /* Disable most wildcarding for NetFlow. */
- if (xin->ofproto->netflow) {
- memset(&ctx.xout->wc.masks.dl_src, 0xff,
- sizeof ctx.xout->wc.masks.dl_src);
- memset(&ctx.xout->wc.masks.dl_dst, 0xff,
- sizeof ctx.xout->wc.masks.dl_dst);
- memset(&ctx.xout->wc.masks.dl_type, 0xff,
- sizeof ctx.xout->wc.masks.dl_type);
- memset(&ctx.xout->wc.masks.vlan_tci, 0xff,
- sizeof ctx.xout->wc.masks.vlan_tci);
- memset(&ctx.xout->wc.masks.nw_proto, 0xff,
- sizeof ctx.xout->wc.masks.nw_proto);
- memset(&ctx.xout->wc.masks.nw_src, 0xff,
- sizeof ctx.xout->wc.masks.nw_src);
- memset(&ctx.xout->wc.masks.nw_dst, 0xff,
- sizeof ctx.xout->wc.masks.nw_dst);
- memset(&ctx.xout->wc.masks.tp_src, 0xff,
- sizeof ctx.xout->wc.masks.tp_src);
- memset(&ctx.xout->wc.masks.tp_dst, 0xff,
- sizeof ctx.xout->wc.masks.tp_dst);
- }
-
- ctx.xout->tags = 0;
- ctx.xout->slow = 0;
- ctx.xout->has_learn = false;
- ctx.xout->has_normal = false;
- ctx.xout->has_fin_timeout = false;
- ctx.xout->nf_output_iface = NF_OUT_DROP;
- ctx.xout->mirrors = 0;
-
- ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
- sizeof ctx.xout->odp_actions_stub);
- ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
-
- ctx.recurse = 0;
- ctx.max_resubmit_trigger = false;
- ctx.orig_skb_priority = ctx.xin->flow.skb_priority;
- ctx.table_id = 0;
- ctx.exit = false;
-
- if (xin->ofpacts) {
- ofpacts = xin->ofpacts;
- ofpacts_len = xin->ofpacts_len;
- } else if (xin->rule) {
- ofpacts = xin->rule->up.ofpacts;
- ofpacts_len = xin->rule->up.ofpacts_len;
- } else {
- NOT_REACHED();
- }
-
- 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.xin->flow;
- }
-
- if (ctx.xin->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.xin->flow.tp_src = ctx.base_flow.tp_src = htons(0);
- ctx.xin->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.xin->flow.in_port);
- special = process_special(ctx.ofproto, &ctx.xin->flow, in_port,
- ctx.xin->packet);
- if (special) {
- ctx.xout->slow = special;
- } else {
- static struct vlog_rate_limit trace_rl = VLOG_RATE_LIMIT_INIT(1, 1);
- size_t sample_actions_len;
- uint32_t local_odp_port;
-
- if (ctx.xin->flow.in_port
- != vsp_realdev_to_vlandev(ctx.ofproto, ctx.xin->flow.in_port,
- ctx.xin->flow.vlan_tci)) {
- ctx.base_flow.vlan_tci = 0;
- }
-
- add_sflow_action(&ctx);
- add_ipfix_action(&ctx);
- sample_actions_len = ctx.xout->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.xout->odp_actions.size = sample_actions_len;
- }
- }
-
- if (ctx.max_resubmit_trigger && !ctx.xin->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.xin->packet, &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_must_output_local(ctx.ofproto->up.connmgr, &ctx.xin->flow,
- local_odp_port,
- ctx.xout->odp_actions.data,
- ctx.xout->odp_actions.size)) {
- 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);
-
- /* Clear the metadata and register wildcard masks, because we won't
- * use non-header fields as part of the cache. */
- memset(&ctx.xout->wc.masks.metadata, 0,
- sizeof ctx.xout->wc.masks.metadata);
- memset(&ctx.xout->wc.masks.regs, 0, sizeof ctx.xout->wc.masks.regs);
-}
-
-/* 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 xlate_in *xin)
-{
- struct xlate_out xout;
-
- xlate_actions(xin, &xout);
- xlate_out_uninit(&xout);
-}
-
-static void
-xlate_report(struct xlate_ctx *ctx, const char *s)
-{
- if (ctx->xin->report_hook) {
- ctx->xin->report_hook(ctx, s);
- }
-}
-
-static void
-xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
-{
- dst->wc = src->wc;
- dst->tags = src->tags;
- dst->slow = src->slow;
- dst->has_learn = src->has_learn;
- dst->has_normal = src->has_normal;
- dst->has_fin_timeout = src->has_fin_timeout;
- dst->nf_output_iface = src->nf_output_iface;
- dst->mirrors = src->mirrors;
-
- ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
- sizeof dst->odp_actions_stub);
- ofpbuf_put(&dst->odp_actions, src->odp_actions.data,
- src->odp_actions.size);
-}
-\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 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->xin->flow,
- &ctx->xout->wc, vid, &ctx->xout->tags);
- if (!port) {
- /* No slaves enabled, so drop packet. */
- return;
- }
- }
-
- old_tci = ctx->xin->flow.vlan_tci;
- tci = htons(vid);
- if (tci || out_bundle->use_priority_tags) {
- tci |= ctx->xin->flow.vlan_tci & htons(VLAN_PCP_MASK);
- if (tci) {
- tci |= htons(VLAN_CFI);
- }
- }
- ctx->xin->flow.vlan_tci = tci;
-
- compose_output_action(ctx, port->up.ofp_port);
- ctx->xin->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 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->xin->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->xin->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->xin->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->xout->odp_actions.data,
- ctx->xout->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->xin->flow = *orig_flow;
-
- while (mirrors) {
- struct ofmirror *m;
-
- m = ofproto->mirrors[mirror_mask_ffs(mirrors) - 1];
-
- if (m->vlans) {
- ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
- }
-
- if (!vlan_is_mirrored(m, vlan)) {
- mirrors = zero_rightmost_1bit(mirrors);
- continue;
- }
-
- mirrors &= ~m->dup_mirrors;
- ctx->xout->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, struct flow_wildcards *wc)
-{
- if (flow->dl_type != htons(ETH_TYPE_ARP)) {
- return false;
- }
-
- memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
- if (!eth_addr_is_broadcast(flow->dl_dst)) {
- return false;
- }
-
- memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
- if (flow->nw_proto == ARP_OP_REPLY) {
- return true;
- } else if (flow->nw_proto == ARP_OP_REQUEST) {
- memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
- memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
-
- return flow->nw_src == flow->nw_dst;
- } else {
- return false;
- }
-}
-
-static void
-update_learning_table(struct ofproto_dpif *ofproto,
- const struct flow *flow, struct flow_wildcards *wc,
- 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, wc)) {
- /* 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 xlate_ctx *ctx, struct ofport_dpif *in_port,
- uint16_t vlan)
-{
- struct ofproto_dpif *ofproto = ctx->ofproto;
- struct flow *flow = &ctx->xin->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->xout->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, &ctx->xout->wc)
- || 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 xlate_ctx *ctx)
-{
- struct ofport_dpif *in_port;
- struct ofbundle *in_bundle;
- struct mac_entry *mac;
- uint16_t vlan;
- uint16_t vid;
-
- ctx->xout->has_normal = true;
-
- /* Check the dl_type, since we may check for gratuituous ARP. */
- memset(&ctx->xout->wc.masks.dl_type, 0xff,
- sizeof ctx->xout->wc.masks.dl_type);
-
- memset(&ctx->xout->wc.masks.dl_src, 0xff,
- sizeof ctx->xout->wc.masks.dl_src);
- memset(&ctx->xout->wc.masks.dl_dst, 0xff,
- sizeof ctx->xout->wc.masks.dl_dst);
- memset(&ctx->xout->wc.masks.vlan_tci, 0xff,
- sizeof ctx->xout->wc.masks.vlan_tci);
-
- in_bundle = lookup_input_bundle(ctx->ofproto, ctx->xin->flow.in_port,
- ctx->xin->packet != NULL, &in_port);
- if (!in_bundle) {
- xlate_report(ctx, "no input bundle, dropping");
- return;
- }
-
- /* Drop malformed frames. */
- if (ctx->xin->flow.dl_type == htons(ETH_TYPE_VLAN) &&
- !(ctx->xin->flow.vlan_tci & htons(VLAN_CFI))) {
- if (ctx->xin->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->xin->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->xin->flow.vlan_tci);
- if (!input_vid_is_valid(vid, in_bundle, ctx->xin->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->xin->may_learn) {
- update_learning_table(ctx->ofproto, &ctx->xin->flow, &ctx->xout->wc,
- vlan, in_bundle);
- }
-
- /* Determine output bundle. */
- mac = mac_learning_lookup(ctx->ofproto->ml, ctx->xin->flow.dl_dst, vlan,
- &ctx->xout->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->xout->nf_output_iface = NF_OUT_FLOOD;
- }
-}
-\f
-/* Optimized flow revalidation.
- *
- * It's a difficult problem, in general, to tell which facets need to have
- * their actions recalculated whenever the OpenFlow flow table changes. We
- * don't try to solve that general problem: for most kinds of OpenFlow flow
- * table changes, we recalculate the actions for every facet. This is
- * relatively expensive, but it's good enough if the OpenFlow flow table
- * doesn't change very often.
- *
- * However, we can expect one particular kind of OpenFlow flow table change to
- * happen frequently: changes caused by MAC learning. To avoid wasting a lot
- * of CPU on revalidating every facet whenever MAC learning modifies the flow
- * table, we add a special case that applies to flow tables in which every rule
- * has the same form (that is, the same wildcards), except that the table is
- * also allowed to have a single "catch-all" flow that matches all packets. We
- * optimize this case by tagging all of the facets that resubmit into the table
- * and invalidating the same tag whenever a flow changes in that table. The
- * end result is that we revalidate just the facets that need it (and sometimes
- * a few more, but not all of the facets or even all of the facets that
- * resubmit to the table modified by MAC learning). */
-
-/* Calculates the tag to use for 'flow' and mask 'mask' when it is inserted
- * into an OpenFlow table with the given 'basis'. */
-static tag_type
-rule_calculate_tag(const struct flow *flow, const struct minimask *mask,
- uint32_t secret)
-{
- if (minimask_is_catchall(mask)) {
- return 0;
- } else {
- uint32_t hash = flow_hash_in_minimask(flow, mask, secret);
- return tag_create_deterministic(hash);
- }
-}
-
-/* Following a change to OpenFlow table 'table_id' in 'ofproto', update the
- * taggability of that table.
- *
- * This function must be called after *each* change to a flow table. If you
- * skip calling it on some changes then the pointer comparisons at the end can
- * be invalid if you get unlucky. For example, if a flow removal causes a
- * cls_table to be destroyed and then a flow insertion causes a cls_table with
- * different wildcards to be created with the same address, then this function
- * will incorrectly skip revalidation. */
-static void
-table_update_taggable(struct ofproto_dpif *ofproto, uint8_t table_id)
-{
- struct table_dpif *table = &ofproto->tables[table_id];
- const struct oftable *oftable = &ofproto->up.tables[table_id];
- struct cls_table *catchall, *other;
- struct cls_table *t;
-
- catchall = other = NULL;
-
- switch (hmap_count(&oftable->cls.tables)) {
- case 0:
- /* We could tag this OpenFlow table but it would make the logic a
- * little harder and it's a corner case that doesn't seem worth it
- * yet. */
- break;
-
- case 1:
- case 2:
- HMAP_FOR_EACH (t, hmap_node, &oftable->cls.tables) {
- if (cls_table_is_catchall(t)) {
- catchall = t;
- } else if (!other) {
- other = t;
- } else {
- /* Indicate that we can't tag this by setting both tables to
- * NULL. (We know that 'catchall' is already NULL.) */
- other = NULL;
- }
- }
- break;
-
- default:
- /* Can't tag this table. */
- break;
- }
-
- if (table->catchall_table != catchall || table->other_table != other) {
- table->catchall_table = catchall;
- table->other_table = other;
- ofproto->backer->need_revalidate = REV_FLOW_TABLE;
- }
-}
-
-/* Given 'rule' that has changed in some way (either it is a rule being
- * inserted, a rule being deleted, or a rule whose actions are being
- * modified), marks facets for revalidation to ensure that packets will be
- * forwarded correctly according to the new state of the flow table.
- *
- * This function must be called after *each* change to a flow table. See
- * the comment on table_update_taggable() for more information. */
-static void
-rule_invalidate(const struct rule_dpif *rule)
-{
- struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
-
- table_update_taggable(ofproto, rule->up.table_id);
-
- if (!ofproto->backer->need_revalidate) {
- struct table_dpif *table = &ofproto->tables[rule->up.table_id];
-
- if (table->other_table && rule->tag) {
- tag_set_add(&ofproto->backer->revalidate_set, rule->tag);
- } else {
- ofproto->backer->need_revalidate = REV_FLOW_TABLE;
- }
- }
-}
-\f
-static bool
-set_frag_handling(struct ofproto *ofproto_,
- enum ofp_config_flags frag_handling)
+\f
+static bool
+set_frag_handling(struct ofproto *ofproto_,
+ enum ofp_config_flags frag_handling)
{
struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
if (frag_handling != OFPC_FRAG_REASM) {
ofpbuf_uninit(&odp_key);
}
-static void
+void
ofproto_trace(struct ofproto_dpif *ofproto, const struct flow *flow,
const struct ofpbuf *packet, struct ds *ds)
{
*
* Unless VLAN splinters are enabled for port 'realdev_ofp_port', this
* function just returns its 'realdev_ofp_port' argument. */
-static uint16_t
+uint16_t
vsp_realdev_to_vlandev(const struct ofproto_dpif *ofproto,
uint16_t realdev_ofp_port, ovs_be16 vlan_tci)
{
}
}
-static uint32_t
+uint32_t
ofp_port_to_odp_port(const struct ofproto_dpif *ofproto, uint16_t ofp_port)
{
const struct ofport_dpif *ofport = get_ofp_port(ofproto, ofp_port);
git://git.onelab.eu / sliver-openvswitch.git / commitdiff