--- /dev/null
+/*
+ * Copyright (c) 2009 Nicira Networks.
+ *
+ * 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 "dpif.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <net/if.h>
+#include <linux/rtnetlink.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <unistd.h>
+
+#include "csum.h"
+#include "dpif-provider.h"
+#include "flow.h"
+#include "hmap.h"
+#include "list.h"
+#include "netdev.h"
+#include "odp-util.h"
+#include "ofp-print.h"
+#include "ofpbuf.h"
+#include "packets.h"
+#include "poll-loop.h"
+#include "queue.h"
+#include "timeval.h"
+#include "util.h"
+
+#include "vlog.h"
+#define THIS_MODULE VLM_dpif_netdev
+
+/* Configuration parameters. */
+enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */
+enum { MAX_QUEUE_LEN = 100 }; /* Maximum number of packets per queue. */
+enum { N_GROUPS = 16 }; /* Number of port groups. */
+enum { MAX_PORTS = 256 }; /* Maximum number of ports. */
+enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
+
+/* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
+ * headers to be aligned on a 4-byte boundary. */
+enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
+
+/* Datapath based on the network device interface from netdev.h. */
+struct dp_netdev {
+ struct list node;
+ int dp_idx;
+ int open_cnt;
+ bool deleted;
+
+ bool drop_frags; /* Drop all IP fragments, if true. */
+ struct ovs_queue queues[N_QUEUES]; /* Messages queued for dpif_recv(). */
+ struct hmap flow_table; /* Flow table. */
+ struct odp_port_group groups[N_GROUPS];
+
+ /* Statistics. */
+ long long int n_frags; /* Number of dropped IP fragments. */
+ long long int n_hit; /* Number of flow table matches. */
+ long long int n_missed; /* Number of flow table misses. */
+ long long int n_lost; /* Number of misses not passed to client. */
+
+ /* Ports. */
+ int n_ports;
+ struct dp_netdev_port *ports[MAX_PORTS];
+ struct list port_list;
+ unsigned int serial;
+};
+
+/* A port in a netdev-based datapath. */
+struct dp_netdev_port {
+ int port_no; /* Index into dp_netdev's 'ports'. */
+ struct list node; /* Element in dp_netdev's 'port_list'. */
+ struct netdev *netdev;
+ bool internal; /* Internal port (as ODP_PORT_INTERNAL)? */
+};
+
+/* A flow in dp_netdev's 'flow_table'. */
+struct dp_netdev_flow {
+ struct hmap_node node; /* Element in dp_netdev's 'flow_table'. */
+ flow_t key;
+
+ /* Statistics. */
+ struct timeval used; /* Last used time, in milliseconds. */
+ long long int packet_count; /* Number of packets matched. */
+ long long int byte_count; /* Number of bytes matched. */
+ uint8_t ip_tos; /* IP TOS value. */
+ uint16_t tcp_ctl; /* Bitwise-OR of seen tcp_ctl values. */
+
+ /* Actions. */
+ union odp_action *actions;
+ unsigned int n_actions;
+};
+
+/* Interface to netdev-based datapath. */
+struct dpif_netdev {
+ struct dpif dpif;
+ struct dp_netdev *dp;
+ int listen_mask;
+ unsigned int dp_serial;
+};
+
+/* All netdev-based datapaths. */
+static struct dp_netdev *dp_netdevs[256];
+struct list dp_netdev_list = LIST_INITIALIZER(&dp_netdev_list);
+enum { N_DP_NETDEVS = ARRAY_SIZE(dp_netdevs) };
+
+/* Maximum port MTU seen so far. */
+static int max_mtu = ETH_PAYLOAD_MAX;
+
+static int get_port_by_number(struct dp_netdev *, uint16_t port_no,
+ struct dp_netdev_port **portp);
+static int get_port_by_name(struct dp_netdev *, const char *devname,
+ struct dp_netdev_port **portp);
+static void dp_netdev_free(struct dp_netdev *);
+static void dp_netdev_flow_flush(struct dp_netdev *);
+static int do_add_port(struct dp_netdev *, const char *devname, uint16_t flags,
+ uint16_t port_no);
+static int do_del_port(struct dp_netdev *, uint16_t port_no);
+static int dp_netdev_output_control(struct dp_netdev *, const struct ofpbuf *,
+ int queue_no, int port_no, uint32_t arg);
+static int dp_netdev_execute_actions(struct dp_netdev *,
+ struct ofpbuf *, flow_t *,
+ const union odp_action *, int n);
+
+static struct dpif_netdev *
+dpif_netdev_cast(const struct dpif *dpif)
+{
+ dpif_assert_class(dpif, &dpif_netdev_class);
+ return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
+}
+
+static struct dp_netdev *
+get_dp_netdev(const struct dpif *dpif)
+{
+ return dpif_netdev_cast(dpif)->dp;
+}
+
+static int
+name_to_dp_idx(const char *name)
+{
+ if (!strncmp(name, "dp", 2) && isdigit(name[2])) {
+ int dp_idx = atoi(name + 2);
+ if (dp_idx >= 0 && dp_idx < N_DP_NETDEVS) {
+ return dp_idx;
+ }
+ }
+ return -1;
+}
+
+static struct dp_netdev *
+find_dp_netdev(const char *name)
+{
+ int dp_idx;
+ size_t i;
+
+ dp_idx = name_to_dp_idx(name);
+ if (dp_idx >= 0) {
+ return dp_netdevs[dp_idx];
+ }
+
+ for (i = 0; i < N_DP_NETDEVS; i++) {
+ struct dp_netdev *dp = dp_netdevs[i];
+ if (dp) {
+ struct dp_netdev_port *port;
+ if (!get_port_by_name(dp, name, &port)) {
+ return dp;
+ }
+ }
+ }
+ return NULL;
+}
+
+static struct dpif *
+create_dpif_netdev(struct dp_netdev *dp)
+{
+ struct dpif_netdev *dpif;
+ char *dpname;
+
+ dp->open_cnt++;
+
+ dpname = xasprintf("netdev:dp%d", dp->dp_idx);
+ dpif = xmalloc(sizeof *dpif);
+ dpif_init(&dpif->dpif, &dpif_netdev_class, dpname, dp->dp_idx, dp->dp_idx);
+ dpif->dp = dp;
+ dpif->listen_mask = 0;
+ dpif->dp_serial = dp->serial;
+ free(dpname);
+
+ return &dpif->dpif;
+}
+
+static int
+create_dp_netdev(const char *name, int dp_idx, struct dpif **dpifp)
+{
+ struct dp_netdev *dp;
+ int error;
+ int i;
+
+ if (dp_netdevs[dp_idx]) {
+ return EBUSY;
+ }
+
+ /* Create datapath. */
+ dp_netdevs[dp_idx] = dp = xcalloc(1, sizeof *dp);
+ list_push_back(&dp_netdev_list, &dp->node);
+ dp->dp_idx = dp_idx;
+ dp->open_cnt = 0;
+ dp->drop_frags = false;
+ for (i = 0; i < N_QUEUES; i++) {
+ queue_init(&dp->queues[i]);
+ }
+ hmap_init(&dp->flow_table);
+ for (i = 0; i < N_GROUPS; i++) {
+ dp->groups[i].ports = NULL;
+ dp->groups[i].n_ports = 0;
+ dp->groups[i].group = i;
+ }
+ list_init(&dp->port_list);
+ error = do_add_port(dp, name, ODP_PORT_INTERNAL, ODPP_LOCAL);
+ if (error) {
+ dp_netdev_free(dp);
+ return error;
+ }
+
+ *dpifp = create_dpif_netdev(dp);
+ return 0;
+}
+
+static int
+dpif_netdev_open(const char *name UNUSED, char *suffix, bool create,
+ struct dpif **dpifp)
+{
+ if (create) {
+ if (find_dp_netdev(suffix)) {
+ return EEXIST;
+ } else {
+ int dp_idx = name_to_dp_idx(suffix);
+ if (dp_idx >= 0) {
+ return create_dp_netdev(suffix, dp_idx, dpifp);
+ } else {
+ /* Scan for unused dp_idx number. */
+ for (dp_idx = 0; dp_idx < N_DP_NETDEVS; dp_idx++) {
+ int error = create_dp_netdev(suffix, dp_idx, dpifp);
+ if (error != EBUSY) {
+ return error;
+ }
+ }
+
+ /* All datapath numbers in use. */
+ return ENOBUFS;
+ }
+ }
+ } else {
+ struct dp_netdev *dp = find_dp_netdev(suffix);
+ if (dp) {
+ *dpifp = create_dpif_netdev(dp);
+ return 0;
+ } else {
+ return ENODEV;
+ }
+ }
+}
+
+static void
+dp_netdev_free(struct dp_netdev *dp)
+{
+ int i;
+
+ dp_netdev_flow_flush(dp);
+ while (dp->n_ports > 0) {
+ struct dp_netdev_port *port = CONTAINER_OF(
+ dp->port_list.next, struct dp_netdev_port, node);
+ do_del_port(dp, port->port_no);
+ }
+ for (i = 0; i < N_QUEUES; i++) {
+ queue_destroy(&dp->queues[i]);
+ }
+ hmap_destroy(&dp->flow_table);
+ for (i = 0; i < N_GROUPS; i++) {
+ free(dp->groups[i].ports);
+ }
+ dp_netdevs[dp->dp_idx] = NULL;
+ list_remove(&dp->node);
+ free(dp);
+}
+
+static void
+dpif_netdev_close(struct dpif *dpif)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ assert(dp->open_cnt > 0);
+ if (--dp->open_cnt == 0 && dp->deleted) {
+ dp_netdev_free(dp);
+ }
+ free(dpif);
+}
+
+static int
+dpif_netdev_delete(struct dpif *dpif)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ dp->deleted = true;
+ return 0;
+}
+
+static int
+dpif_netdev_get_stats(const struct dpif *dpif, struct odp_stats *stats)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ memset(stats, 0, sizeof *stats);
+ stats->n_flows = hmap_count(&dp->flow_table);
+ stats->cur_capacity = hmap_capacity(&dp->flow_table);
+ stats->max_capacity = MAX_FLOWS;
+ stats->n_ports = dp->n_ports;
+ stats->max_ports = MAX_PORTS;
+ stats->max_groups = N_GROUPS;
+ stats->n_frags = dp->n_frags;
+ stats->n_hit = dp->n_hit;
+ stats->n_missed = dp->n_missed;
+ stats->n_lost = dp->n_lost;
+ stats->max_miss_queue = MAX_QUEUE_LEN;
+ stats->max_action_queue = MAX_QUEUE_LEN;
+ return 0;
+}
+
+static int
+dpif_netdev_get_drop_frags(const struct dpif *dpif, bool *drop_fragsp)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ *drop_fragsp = dp->drop_frags;
+ return 0;
+}
+
+static int
+dpif_netdev_set_drop_frags(struct dpif *dpif, bool drop_frags)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ dp->drop_frags = drop_frags;
+ return 0;
+}
+
+static int
+do_add_port(struct dp_netdev *dp, const char *devname, uint16_t flags,
+ uint16_t port_no)
+{
+ bool internal = (flags & ODP_PORT_INTERNAL) != 0;
+ struct dp_netdev_port *port;
+ struct netdev *netdev;
+ int mtu;
+ int error;
+
+ /* XXX reject devices already in some dp_netdev. */
+
+ /* Open and validate network device. */
+ if (!internal) {
+ error = netdev_open(devname, NETDEV_ETH_TYPE_ANY, &netdev);
+ } else {
+ error = netdev_open_tap(devname, &netdev);
+ }
+ if (error) {
+ return error;
+ }
+ /* XXX reject loopback devices */
+ /* XXX reject non-Ethernet devices */
+
+ error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, false);
+ if (error) {
+ netdev_close(netdev);
+ return error;
+ }
+
+ port = xmalloc(sizeof *port);
+ port->port_no = port_no;
+ port->netdev = netdev;
+ port->internal = internal;
+
+ mtu = netdev_get_mtu(netdev);
+ if (mtu > max_mtu) {
+ max_mtu = mtu;
+ }
+
+ list_push_back(&dp->port_list, &port->node);
+ dp->ports[port_no] = port;
+ dp->n_ports++;
+ dp->serial++;
+
+ return 0;
+}
+
+static int
+dpif_netdev_port_add(struct dpif *dpif, const char *devname, uint16_t flags,
+ uint16_t *port_nop)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ int port_no;
+
+ for (port_no = 0; port_no < MAX_PORTS; port_no++) {
+ if (!dp->ports[port_no]) {
+ *port_nop = port_no;
+ return do_add_port(dp, devname, flags, port_no);
+ }
+ }
+ return EXFULL;
+}
+
+static int
+dpif_netdev_port_del(struct dpif *dpif, uint16_t port_no)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ return port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
+}
+
+static bool
+is_valid_port_number(uint16_t port_no)
+{
+ return port_no < MAX_PORTS;
+}
+
+static int
+get_port_by_number(struct dp_netdev *dp,
+ uint16_t port_no, struct dp_netdev_port **portp)
+{
+ if (!is_valid_port_number(port_no)) {
+ *portp = NULL;
+ return EINVAL;
+ } else {
+ *portp = dp->ports[port_no];
+ return *portp ? 0 : ENOENT;
+ }
+}
+
+static int
+get_port_by_name(struct dp_netdev *dp,
+ const char *devname, struct dp_netdev_port **portp)
+{
+ struct dp_netdev_port *port;
+
+ LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
+ if (!strcmp(netdev_get_name(port->netdev), devname)) {
+ *portp = port;
+ return 0;
+ }
+ }
+ return ENOENT;
+}
+
+static int
+do_del_port(struct dp_netdev *dp, uint16_t port_no)
+{
+ struct dp_netdev_port *port;
+ int error;
+
+ error = get_port_by_number(dp, port_no, &port);
+ if (error) {
+ return error;
+ }
+
+ list_remove(&port->node);
+ dp->ports[port->port_no] = NULL;
+ dp->n_ports--;
+ dp->serial++;
+
+ netdev_close(port->netdev);
+ free(port);
+
+ return 0;
+}
+
+static void
+answer_port_query(const struct dp_netdev_port *port, struct odp_port *odp_port)
+{
+ memset(odp_port, 0, sizeof *odp_port);
+ ovs_strlcpy(odp_port->devname, netdev_get_name(port->netdev),
+ sizeof odp_port->devname);
+ odp_port->port = port->port_no;
+ odp_port->flags = port->internal ? ODP_PORT_INTERNAL : 0;
+}
+
+static int
+dpif_netdev_port_query_by_number(const struct dpif *dpif, uint16_t port_no,
+ struct odp_port *odp_port)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_port *port;
+ int error;
+
+ error = get_port_by_number(dp, port_no, &port);
+ if (!error) {
+ answer_port_query(port, odp_port);
+ }
+ return error;
+}
+
+static int
+dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
+ struct odp_port *odp_port)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_port *port;
+ int error;
+
+ error = get_port_by_name(dp, devname, &port);
+ if (!error) {
+ answer_port_query(port, odp_port);
+ }
+ return error;
+}
+
+static void
+dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
+{
+ hmap_remove(&dp->flow_table, &flow->node);
+ free(flow->actions);
+ free(flow);
+}
+
+static void
+dp_netdev_flow_flush(struct dp_netdev *dp)
+{
+ struct dp_netdev_flow *flow, *next;
+
+ HMAP_FOR_EACH_SAFE (flow, next, struct dp_netdev_flow, node,
+ &dp->flow_table) {
+ dp_netdev_free_flow(dp, flow);
+ }
+}
+
+static int
+dpif_netdev_flow_flush(struct dpif *dpif)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ dp_netdev_flow_flush(dp);
+ return 0;
+}
+
+static int
+dpif_netdev_port_list(const struct dpif *dpif, struct odp_port *ports, int n)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_port *port;
+ int i;
+
+ i = 0;
+ LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
+ struct odp_port *odp_port = &ports[i];
+ if (i >= n) {
+ break;
+ }
+ answer_port_query(port, odp_port);
+ i++;
+ }
+ return dp->n_ports;
+}
+
+static int
+dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep UNUSED)
+{
+ struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
+ if (dpif->dp_serial != dpif->dp->serial) {
+ dpif->dp_serial = dpif->dp->serial;
+ return ENOBUFS;
+ } else {
+ return EAGAIN;
+ }
+}
+
+static void
+dpif_netdev_port_poll_wait(const struct dpif *dpif_)
+{
+ struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
+ if (dpif->dp_serial != dpif->dp->serial) {
+ poll_immediate_wake();
+ }
+}
+
+static int
+get_port_group(const struct dpif *dpif, int group_no,
+ struct odp_port_group **groupp)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+
+ if (group_no >= 0 && group_no < N_GROUPS) {
+ *groupp = &dp->groups[group_no];
+ return 0;
+ } else {
+ *groupp = NULL;
+ return EINVAL;
+ }
+}
+
+static int
+dpif_netdev_port_group_get(const struct dpif *dpif, int group_no,
+ uint16_t ports[], int n)
+{
+ struct odp_port_group *group;
+ int error;
+
+ if (n < 0) {
+ return -EINVAL;
+ }
+
+ error = get_port_group(dpif, group_no, &group);
+ if (!error) {
+ memcpy(ports, group->ports, MIN(n, group->n_ports) * sizeof *ports);
+ return group->n_ports;
+ } else {
+ return -error;
+ }
+}
+
+static int
+dpif_netdev_port_group_set(struct dpif *dpif, int group_no,
+ const uint16_t ports[], int n)
+{
+ struct odp_port_group *group;
+ int error;
+
+ if (n < 0 || n > MAX_PORTS) {
+ return EINVAL;
+ }
+
+ error = get_port_group(dpif, group_no, &group);
+ if (!error) {
+ free(group->ports);
+ group->ports = xmemdup(ports, n * sizeof *group->ports);
+ group->n_ports = n;
+ group->group = group_no;
+ }
+ return error;
+}
+
+static struct dp_netdev_flow *
+dp_netdev_lookup_flow(const struct dp_netdev *dp, const flow_t *key)
+{
+ struct dp_netdev_flow *flow;
+
+ assert(key->reserved == 0);
+ HMAP_FOR_EACH_WITH_HASH (flow, struct dp_netdev_flow, node,
+ flow_hash(key, 0), &dp->flow_table) {
+ if (flow_equal(&flow->key, key)) {
+ return flow;
+ }
+ }
+ return NULL;
+}
+
+static void
+answer_flow_query(const struct dp_netdev_flow *flow,
+ struct odp_flow *odp_flow)
+{
+ if (flow) {
+ odp_flow->key = flow->key;
+ odp_flow->stats.n_packets = flow->packet_count;
+ odp_flow->stats.n_bytes = flow->byte_count;
+ odp_flow->stats.used_sec = flow->used.tv_sec;
+ odp_flow->stats.used_nsec = flow->used.tv_usec * 1000;
+ odp_flow->stats.tcp_flags = TCP_FLAGS(flow->tcp_ctl);
+ odp_flow->stats.ip_tos = flow->ip_tos;
+ odp_flow->stats.error = 0;
+ if (odp_flow->n_actions > 0) {
+ unsigned int n = MIN(odp_flow->n_actions, flow->n_actions);
+ memcpy(odp_flow->actions, flow->actions,
+ n * sizeof *odp_flow->actions);
+ odp_flow->n_actions = flow->n_actions;
+ }
+ } else {
+ odp_flow->stats.error = ENOENT;
+ }
+}
+
+static int
+dpif_netdev_flow_get(const struct dpif *dpif, struct odp_flow flows[], int n)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ int i;
+
+ for (i = 0; i < n; i++) {
+ struct odp_flow *odp_flow = &flows[i];
+ answer_flow_query(dp_netdev_lookup_flow(dp, &odp_flow->key), odp_flow);
+ }
+ return 0;
+}
+
+static int
+dpif_netdev_validate_actions(const union odp_action *actions, int n_actions,
+ bool *mutates)
+{
+ unsigned int i;
+
+ *mutates = false;
+ for (i = 0; i < n_actions; i++) {
+ const union odp_action *a = &actions[i];
+ switch (a->type) {
+ case ODPAT_OUTPUT:
+ if (a->output.port >= MAX_PORTS) {
+ return EINVAL;
+ }
+ break;
+
+ case ODPAT_OUTPUT_GROUP:
+ *mutates = true;
+ if (a->output_group.group >= N_GROUPS) {
+ return EINVAL;
+ }
+ break;
+
+ case ODPAT_CONTROLLER:
+ break;
+
+ case ODPAT_SET_VLAN_VID:
+ *mutates = true;
+ if (a->vlan_vid.vlan_vid & htons(~VLAN_VID_MASK)) {
+ return EINVAL;
+ }
+ break;
+
+ case ODPAT_SET_VLAN_PCP:
+ *mutates = true;
+ if (a->vlan_pcp.vlan_pcp & ~VLAN_PCP_MASK) {
+ return EINVAL;
+ }
+ break;
+
+ case ODPAT_STRIP_VLAN:
+ case ODPAT_SET_DL_SRC:
+ case ODPAT_SET_DL_DST:
+ case ODPAT_SET_NW_SRC:
+ case ODPAT_SET_NW_DST:
+ case ODPAT_SET_TP_SRC:
+ case ODPAT_SET_TP_DST:
+ *mutates = true;
+ break;
+
+ default:
+ return EOPNOTSUPP;
+ }
+ }
+ return 0;
+}
+
+static int
+set_flow_actions(struct dp_netdev_flow *flow, struct odp_flow *odp_flow)
+{
+ size_t n_bytes;
+ bool mutates;
+ int error;
+
+ if (odp_flow->n_actions >= 4096 / sizeof *odp_flow->actions) {
+ return EINVAL;
+ }
+ error = dpif_netdev_validate_actions(odp_flow->actions,
+ odp_flow->n_actions, &mutates);
+ if (error) {
+ return error;
+ }
+
+ n_bytes = odp_flow->n_actions * sizeof *flow->actions;
+ flow->actions = xrealloc(flow->actions, n_bytes);
+ flow->n_actions = odp_flow->n_actions;
+ memcpy(flow->actions, odp_flow->actions, n_bytes);
+ return 0;
+}
+
+static int
+add_flow(struct dpif *dpif, struct odp_flow *odp_flow)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_flow *flow;
+ int error;
+
+ flow = xcalloc(1, sizeof *flow);
+ flow->key = odp_flow->key;
+ flow->key.reserved = 0;
+
+ error = set_flow_actions(flow, odp_flow);
+ if (error) {
+ free(flow);
+ return error;
+ }
+
+ hmap_insert(&dp->flow_table, &flow->node, flow_hash(&flow->key, 0));
+ return 0;
+}
+
+static void
+clear_stats(struct dp_netdev_flow *flow)
+{
+ flow->used.tv_sec = 0;
+ flow->used.tv_usec = 0;
+ flow->packet_count = 0;
+ flow->byte_count = 0;
+ flow->ip_tos = 0;
+ flow->tcp_ctl = 0;
+}
+
+static int
+dpif_netdev_flow_put(struct dpif *dpif, struct odp_flow_put *put)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_flow *flow;
+
+ flow = dp_netdev_lookup_flow(dp, &put->flow.key);
+ if (!flow) {
+ if (put->flags & ODPPF_CREATE) {
+ if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
+ return add_flow(dpif, &put->flow);
+ } else {
+ return EXFULL;
+ }
+ } else {
+ return ENOENT;
+ }
+ } else {
+ if (put->flags & ODPPF_MODIFY) {
+ int error = set_flow_actions(flow, &put->flow);
+ if (!error && put->flags & ODPPF_ZERO_STATS) {
+ clear_stats(flow);
+ }
+ return error;
+ } else {
+ return EEXIST;
+ }
+ }
+}
+
+
+static int
+dpif_netdev_flow_del(struct dpif *dpif, struct odp_flow *odp_flow)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_flow *flow;
+
+ flow = dp_netdev_lookup_flow(dp, &odp_flow->key);
+ if (flow) {
+ answer_flow_query(flow, odp_flow);
+ dp_netdev_free_flow(dp, flow);
+ return 0;
+ } else {
+ return ENOENT;
+ }
+}
+
+static int
+dpif_netdev_flow_list(const struct dpif *dpif, struct odp_flow flows[], int n)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_flow *flow;
+ int i;
+
+ i = 0;
+ HMAP_FOR_EACH (flow, struct dp_netdev_flow, node, &dp->flow_table) {
+ if (i >= n) {
+ break;
+ }
+ answer_flow_query(flow, &flows[i++]);
+ }
+ return hmap_count(&dp->flow_table);
+}
+
+static int
+dpif_netdev_execute(struct dpif *dpif, uint16_t in_port,
+ const union odp_action actions[], int n_actions,
+ const struct ofpbuf *packet)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct ofpbuf copy;
+ bool mutates;
+ flow_t flow;
+ int error;
+
+ if (packet->size < ETH_HLEN || packet->size > UINT16_MAX) {
+ return EINVAL;
+ }
+
+ error = dpif_netdev_validate_actions(actions, n_actions, &mutates);
+ if (error) {
+ return error;
+ }
+
+ if (mutates) {
+ /* We need a deep copy of 'packet' since we're going to modify its
+ * data. */
+ ofpbuf_init(©, DP_NETDEV_HEADROOM + packet->size);
+ copy.data = (char*)copy.base + DP_NETDEV_HEADROOM;
+ ofpbuf_put(©, packet->data, packet->size);
+ } else {
+ /* We still need a shallow copy of 'packet', even though we won't
+ * modify its data, because flow_extract() modifies packet->l2, etc.
+ * We could probably get away with modifying those but it's more polite
+ * if we don't. */
+ copy = *packet;
+ }
+ flow_extract(©, in_port, &flow);
+ error = dp_netdev_execute_actions(dp, ©, &flow, actions, n_actions);
+ if (mutates) {
+ ofpbuf_uninit(©);
+ }
+ return error;
+}
+
+static int
+dpif_netdev_recv_get_mask(const struct dpif *dpif, int *listen_mask)
+{
+ struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
+ *listen_mask = dpif_netdev->listen_mask;
+ return 0;
+}
+
+static int
+dpif_netdev_recv_set_mask(struct dpif *dpif, int listen_mask)
+{
+ struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
+ if (!(listen_mask & ~ODPL_ALL)) {
+ dpif_netdev->listen_mask = listen_mask;
+ return 0;
+ } else {
+ return EINVAL;
+ }
+}
+
+static struct ovs_queue *
+find_nonempty_queue(struct dpif *dpif)
+{
+ struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ int mask = dpif_netdev->listen_mask;
+ int i;
+
+ for (i = 0; i < N_QUEUES; i++) {
+ struct ovs_queue *q = &dp->queues[i];
+ if (q->n && mask & (1u << i)) {
+ return q;
+ }
+ }
+ return NULL;
+}
+
+static int
+dpif_netdev_recv(struct dpif *dpif, struct ofpbuf **bufp)
+{
+ struct ovs_queue *q = find_nonempty_queue(dpif);
+ if (q) {
+ *bufp = queue_pop_head(q);
+ return 0;
+ } else {
+ return EAGAIN;
+ }
+}
+
+static void
+dpif_netdev_recv_wait(struct dpif *dpif)
+{
+ struct ovs_queue *q = find_nonempty_queue(dpif);
+ if (q) {
+ poll_immediate_wake();
+ } else {
+ /* No messages ready to be received, and dp_wait() will ensure that we
+ * wake up to queue new messages, so there is nothing to do. */
+ }
+}
+\f
+static void
+dp_netdev_flow_used(struct dp_netdev_flow *flow, const flow_t *key,
+ const struct ofpbuf *packet)
+{
+ time_timeval(&flow->used);
+ flow->packet_count++;
+ flow->byte_count += packet->size;
+ if (key->dl_type == htons(ETH_P_IP)) {
+ struct ip_header *nh = packet->l3;
+ flow->ip_tos = nh->ip_tos;
+
+ if (key->nw_proto == IPPROTO_TCP) {
+ struct tcp_header *th = packet->l4;
+ flow->tcp_ctl |= th->tcp_ctl;
+ }
+ }
+}
+
+static void
+dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
+ struct ofpbuf *packet)
+{
+ struct dp_netdev_flow *flow;
+ flow_t key;
+
+ if (flow_extract(packet, port->port_no, &key) && dp->drop_frags) {
+ dp->n_frags++;
+ return;
+ }
+
+ flow = dp_netdev_lookup_flow(dp, &key);
+ if (flow) {
+ dp_netdev_flow_used(flow, &key, packet);
+ dp_netdev_execute_actions(dp, packet, &key,
+ flow->actions, flow->n_actions);
+ dp->n_hit++;
+ } else {
+ dp->n_missed++;
+ dp_netdev_output_control(dp, packet, _ODPL_MISS_NR, port->port_no, 0);
+ }
+}
+
+static void
+dp_netdev_run(void)
+{
+ struct ofpbuf packet;
+ struct dp_netdev *dp;
+
+ ofpbuf_init(&packet, DP_NETDEV_HEADROOM + max_mtu);
+ LIST_FOR_EACH (dp, struct dp_netdev, node, &dp_netdev_list) {
+ struct dp_netdev_port *port;
+
+ LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
+ int error;
+
+ /* Reset packet contents. */
+ packet.data = (char*)packet.base + DP_NETDEV_HEADROOM;
+ packet.size = 0;
+
+ error = netdev_recv(port->netdev, &packet);
+ if (!error) {
+ dp_netdev_port_input(dp, port, &packet);
+ } else if (error != EAGAIN) {
+ struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+ VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
+ netdev_get_name(port->netdev), strerror(error));
+ }
+ }
+ }
+ ofpbuf_uninit(&packet);
+}
+
+static void
+dp_netdev_wait(void)
+{
+ struct dp_netdev *dp;
+
+ LIST_FOR_EACH (dp, struct dp_netdev, node, &dp_netdev_list) {
+ struct dp_netdev_port *port;
+ LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
+ netdev_recv_wait(port->netdev);
+ }
+ }
+}
+
+static void
+dp_netdev_modify_vlan_tci(struct ofpbuf *packet, flow_t *key,
+ uint16_t tci, uint16_t mask)
+{
+ struct vlan_eth_header *veh;
+
+ if (key->dl_vlan != htons(ODP_VLAN_NONE)) {
+ /* Modify 'mask' bits, but maintain other TCI bits. */
+ veh = packet->l2;
+ veh->veth_tci &= ~htons(mask);
+ veh->veth_tci |= htons(tci);
+ } else {
+ /* Insert new 802.1Q header. */
+ struct eth_header *eh = packet->l2;
+ struct vlan_eth_header tmp;
+ memcpy(tmp.veth_dst, eh->eth_dst, ETH_ADDR_LEN);
+ memcpy(tmp.veth_src, eh->eth_src, ETH_ADDR_LEN);
+ tmp.veth_type = htons(ETH_TYPE_VLAN);
+ tmp.veth_tci = htons(tci);
+ tmp.veth_next_type = eh->eth_type;
+
+ veh = ofpbuf_push_uninit(packet, VLAN_HEADER_LEN);
+ memcpy(veh, &tmp, sizeof tmp);
+ packet->l2 = (char*)packet->l2 - VLAN_HEADER_LEN;
+ }
+
+ key->dl_vlan = veh->veth_tci & htons(VLAN_VID_MASK);
+}
+
+static void
+dp_netdev_strip_vlan(struct ofpbuf *packet, flow_t *key)
+{
+ struct vlan_eth_header *veh = packet->l2;
+ if (veh->veth_type == htons(ETH_TYPE_VLAN)) {
+ struct eth_header tmp;
+
+ memcpy(tmp.eth_dst, veh->veth_dst, ETH_ADDR_LEN);
+ memcpy(tmp.eth_src, veh->veth_src, ETH_ADDR_LEN);
+ tmp.eth_type = veh->veth_next_type;
+
+ packet->size -= VLAN_HEADER_LEN;
+ packet->data = (char*)packet->data + VLAN_HEADER_LEN;
+ packet->l2 = (char*)packet->l2 + VLAN_HEADER_LEN;
+ memcpy(packet->data, &tmp, sizeof tmp);
+
+ key->dl_vlan = htons(ODP_VLAN_NONE);
+ }
+}
+
+static void
+dp_netdev_set_dl_src(struct ofpbuf *packet,
+ const uint8_t dl_addr[ETH_ADDR_LEN])
+{
+ struct eth_header *eh = packet->l2;
+ memcpy(eh->eth_src, dl_addr, sizeof eh->eth_src);
+}
+
+static void
+dp_netdev_set_dl_dst(struct ofpbuf *packet,
+ const uint8_t dl_addr[ETH_ADDR_LEN])
+{
+ struct eth_header *eh = packet->l2;
+ memcpy(eh->eth_dst, dl_addr, sizeof eh->eth_dst);
+}
+
+static void
+dp_netdev_set_nw_addr(struct ofpbuf *packet, flow_t *key,
+ const struct odp_action_nw_addr *a)
+{
+ if (key->dl_type == htons(ETH_TYPE_IP)) {
+ struct ip_header *nh = packet->l3;
+ uint32_t *field;
+
+ field = a->type == ODPAT_SET_NW_SRC ? &nh->ip_src : &nh->ip_dst;
+ if (key->nw_proto == IP_TYPE_TCP) {
+ struct tcp_header *th = packet->l4;
+ th->tcp_csum = recalc_csum32(th->tcp_csum, *field, a->nw_addr);
+ } else if (key->nw_proto == IP_TYPE_UDP) {
+ struct udp_header *uh = packet->l4;
+ if (uh->udp_csum) {
+ uh->udp_csum = recalc_csum32(uh->udp_csum, *field, a->nw_addr);
+ if (!uh->udp_csum) {
+ uh->udp_csum = 0xffff;
+ }
+ }
+ }
+ nh->ip_csum = recalc_csum32(nh->ip_csum, *field, a->nw_addr);
+ *field = a->nw_addr;
+ }
+}
+
+static void
+dp_netdev_set_tp_port(struct ofpbuf *packet, flow_t *key,
+ const struct odp_action_tp_port *a)
+{
+ if (key->dl_type == htons(ETH_P_IP)) {
+ uint16_t *field;
+ if (key->nw_proto == IPPROTO_TCP) {
+ struct tcp_header *th = packet->l4;
+ field = a->type == ODPAT_SET_TP_SRC ? &th->tcp_src : &th->tcp_dst;
+ th->tcp_csum = recalc_csum16(th->tcp_csum, *field, a->tp_port);
+ *field = a->tp_port;
+ } else if (key->nw_proto == IPPROTO_UDP) {
+ struct udp_header *uh = packet->l4;
+ field = a->type == ODPAT_SET_TP_SRC ? &uh->udp_src : &uh->udp_dst;
+ uh->udp_csum = recalc_csum16(uh->udp_csum, *field, a->tp_port);
+ *field = a->tp_port;
+ }
+ }
+}
+
+static void
+dp_netdev_output_port(struct dp_netdev *dp, struct ofpbuf *packet,
+ uint16_t out_port)
+{
+ struct dp_netdev_port *p = dp->ports[out_port];
+ if (p) {
+ netdev_send(p->netdev, packet);
+ }
+}
+
+static void
+dp_netdev_output_group(struct dp_netdev *dp, uint16_t group, uint16_t in_port,
+ struct ofpbuf *packet)
+{
+ struct odp_port_group *g = &dp->groups[group];
+ int i;
+
+ for (i = 0; i < g->n_ports; i++) {
+ uint16_t out_port = g->ports[i];
+ if (out_port != in_port) {
+ dp_netdev_output_port(dp, packet, out_port);
+ }
+ }
+}
+
+static int
+dp_netdev_output_control(struct dp_netdev *dp, const struct ofpbuf *packet,
+ int queue_no, int port_no, uint32_t arg)
+{
+ struct ovs_queue *q = &dp->queues[queue_no];
+ struct odp_msg *header;
+ struct ofpbuf *msg;
+ size_t msg_size;
+
+ if (q->n >= MAX_QUEUE_LEN) {
+ dp->n_lost++;
+ return ENOBUFS;
+ }
+
+ msg_size = sizeof *header + packet->size;
+ msg = ofpbuf_new(msg_size);
+ header = ofpbuf_put_uninit(msg, sizeof *header);
+ header->type = queue_no;
+ header->length = msg_size;
+ header->port = port_no;
+ header->arg = arg;
+ ofpbuf_put(msg, packet->data, packet->size);
+ queue_push_tail(q, msg);
+
+ return 0;
+}
+
+static int
+dp_netdev_execute_actions(struct dp_netdev *dp,
+ struct ofpbuf *packet, flow_t *key,
+ const union odp_action *actions, int n_actions)
+{
+ int i;
+ for (i = 0; i < n_actions; i++) {
+ const union odp_action *a = &actions[i];
+
+ switch (a->type) {
+ case ODPAT_OUTPUT:
+ dp_netdev_output_port(dp, packet, a->output.port);
+ break;
+
+ case ODPAT_OUTPUT_GROUP:
+ dp_netdev_output_group(dp, a->output_group.group, key->in_port,
+ packet);
+ break;
+
+ case ODPAT_CONTROLLER:
+ dp_netdev_output_control(dp, packet, _ODPL_ACTION_NR,
+ key->in_port, a->controller.arg);
+ break;
+
+ case ODPAT_SET_VLAN_VID:
+ dp_netdev_modify_vlan_tci(packet, key, ntohs(a->vlan_vid.vlan_vid),
+ VLAN_VID_MASK);
+ break;
+
+ case ODPAT_SET_VLAN_PCP:
+ dp_netdev_modify_vlan_tci(packet, key, a->vlan_pcp.vlan_pcp << 13,
+ VLAN_PCP_MASK);
+ break;
+
+ case ODPAT_STRIP_VLAN:
+ dp_netdev_strip_vlan(packet, key);
+ break;
+
+ case ODPAT_SET_DL_SRC:
+ dp_netdev_set_dl_src(packet, a->dl_addr.dl_addr);
+ break;
+
+ case ODPAT_SET_DL_DST:
+ dp_netdev_set_dl_dst(packet, a->dl_addr.dl_addr);
+ break;
+
+ case ODPAT_SET_NW_SRC:
+ case ODPAT_SET_NW_DST:
+ dp_netdev_set_nw_addr(packet, key, &a->nw_addr);
+ break;
+
+ case ODPAT_SET_TP_SRC:
+ case ODPAT_SET_TP_DST:
+ dp_netdev_set_tp_port(packet, key, &a->tp_port);
+ break;
+ }
+ }
+ return 0;
+}
+
+const struct dpif_class dpif_netdev_class = {
+ "netdev",
+ "netdev",
+ dp_netdev_run,
+ dp_netdev_wait,
+ dpif_netdev_open,
+ dpif_netdev_close,
+ dpif_netdev_delete,
+ dpif_netdev_get_stats,
+ dpif_netdev_get_drop_frags,
+ dpif_netdev_set_drop_frags,
+ dpif_netdev_port_add,
+ dpif_netdev_port_del,
+ dpif_netdev_port_query_by_number,
+ dpif_netdev_port_query_by_name,
+ dpif_netdev_port_list,
+ dpif_netdev_port_poll,
+ dpif_netdev_port_poll_wait,
+ dpif_netdev_port_group_get,
+ dpif_netdev_port_group_set,
+ dpif_netdev_flow_get,
+ dpif_netdev_flow_put,
+ dpif_netdev_flow_del,
+ dpif_netdev_flow_flush,
+ dpif_netdev_flow_list,
+ dpif_netdev_execute,
+ dpif_netdev_recv_get_mask,
+ dpif_netdev_recv_set_mask,
+ dpif_netdev_recv,
+ dpif_netdev_recv_wait,
+};
projects / openvswitch / commitdiff