--- /dev/null
- netdev_options.may_create = true;
+ /*
+ * Copyright (c) 2009, 2010 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 "xfif.h"
+
+ #include <assert.h>
+ #include <ctype.h>
+ #include <errno.h>
+ #include <fcntl.h>
+ #include <inttypes.h>
+ #include <netinet/in.h>
+ #include <sys/socket.h>
+ #include <net/if.h>
+ #include <stdlib.h>
+ #include <string.h>
+ #include <sys/ioctl.h>
+ #include <sys/stat.h>
+ #include <unistd.h>
+
+ #include "csum.h"
+ #include "flow.h"
+ #include "hmap.h"
+ #include "list.h"
+ #include "netdev.h"
+ #include "xflow-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 "xfif-provider.h"
+
+ #include "vlog.h"
+ #define THIS_MODULE VLM_xfif_netdev
+
+ /* Configuration parameters. */
+ enum { N_QUEUES = 2 }; /* Number of queues for xfif_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 { XF_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
+
+ /* Datapath based on the network device interface from netdev.h. */
+ struct xf_netdev {
+ struct list node;
+ int xf_idx;
+ int open_cnt;
+ bool destroyed;
+
+ bool drop_frags; /* Drop all IP fragments, if true. */
+ struct ovs_queue queues[N_QUEUES]; /* Messages queued for xfif_recv(). */
+ struct hmap flow_table; /* Flow table. */
+ struct xflow_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 xf_netdev_port *ports[MAX_PORTS];
+ struct list port_list;
+ unsigned int serial;
+ };
+
+ /* A port in a netdev-based datapath. */
+ struct xf_netdev_port {
+ int port_no; /* Index into xf_netdev's 'ports'. */
+ struct list node; /* Element in xf_netdev's 'port_list'. */
+ struct netdev *netdev;
+ bool internal; /* Internal port (as XFLOW_PORT_INTERNAL)? */
+ };
+
+ /* A flow in xf_netdev's 'flow_table'. */
+ struct xf_netdev_flow {
+ struct hmap_node node; /* Element in xf_netdev's 'flow_table'. */
+ struct xflow_key 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 xflow_action *actions;
+ unsigned int n_actions;
+ };
+
+ /* Interface to netdev-based datapath. */
+ struct xfif_netdev {
+ struct xfif xfif;
+ struct xf_netdev *xf;
+ int listen_mask;
+ unsigned int xf_serial;
+ };
+
+ /* All netdev-based datapaths. */
+ static struct xf_netdev *xf_netdevs[256];
+ struct list xf_netdev_list = LIST_INITIALIZER(&xf_netdev_list);
+ enum { N_XF_NETDEVS = ARRAY_SIZE(xf_netdevs) };
+
+ /* Maximum port MTU seen so far. */
+ static int max_mtu = ETH_PAYLOAD_MAX;
+
+ static int get_port_by_number(struct xf_netdev *, uint16_t port_no,
+ struct xf_netdev_port **portp);
+ static int get_port_by_name(struct xf_netdev *, const char *devname,
+ struct xf_netdev_port **portp);
+ static void xf_netdev_free(struct xf_netdev *);
+ static void xf_netdev_flow_flush(struct xf_netdev *);
+ static int do_add_port(struct xf_netdev *, const char *devname, uint16_t flags,
+ uint16_t port_no);
+ static int do_del_port(struct xf_netdev *, uint16_t port_no);
+ static int xf_netdev_output_control(struct xf_netdev *, const struct ofpbuf *,
+ int queue_no, int port_no, uint32_t arg);
+ static int xf_netdev_execute_actions(struct xf_netdev *,
+ struct ofpbuf *, struct xflow_key *,
+ const union xflow_action *, int n);
+
+ static struct xfif_netdev *
+ xfif_netdev_cast(const struct xfif *xfif)
+ {
+ xfif_assert_class(xfif, &xfif_netdev_class);
+ return CONTAINER_OF(xfif, struct xfif_netdev, xfif);
+ }
+
+ static struct xf_netdev *
+ get_xf_netdev(const struct xfif *xfif)
+ {
+ return xfif_netdev_cast(xfif)->xf;
+ }
+
+ static int
+ name_to_xf_idx(const char *name)
+ {
+ if (!strncmp(name, "xf", 2) && isdigit((unsigned char)name[2])) {
+ int xf_idx = atoi(name + 2);
+ if (xf_idx >= 0 && xf_idx < N_XF_NETDEVS) {
+ return xf_idx;
+ }
+ }
+ return -1;
+ }
+
+ static struct xf_netdev *
+ find_xf_netdev(const char *name)
+ {
+ int xf_idx;
+ size_t i;
+
+ xf_idx = name_to_xf_idx(name);
+ if (xf_idx >= 0) {
+ return xf_netdevs[xf_idx];
+ }
+
+ for (i = 0; i < N_XF_NETDEVS; i++) {
+ struct xf_netdev *xf = xf_netdevs[i];
+ if (xf) {
+ struct xf_netdev_port *port;
+ if (!get_port_by_name(xf, name, &port)) {
+ return xf;
+ }
+ }
+ }
+ return NULL;
+ }
+
+ static struct xfif *
+ create_xfif_netdev(struct xf_netdev *xf)
+ {
+ struct xfif_netdev *xfif;
+ char *xfname;
+
+ xf->open_cnt++;
+
+ xfname = xasprintf("xf%d", xf->xf_idx);
+ xfif = xmalloc(sizeof *xfif);
+ xfif_init(&xfif->xfif, &xfif_netdev_class, xfname, xf->xf_idx, xf->xf_idx);
+ xfif->xf = xf;
+ xfif->listen_mask = 0;
+ xfif->xf_serial = xf->serial;
+ free(xfname);
+
+ return &xfif->xfif;
+ }
+
+ static int
+ create_xf_netdev(const char *name, int xf_idx, struct xfif **xfifp)
+ {
+ struct xf_netdev *xf;
+ int error;
+ int i;
+
+ if (xf_netdevs[xf_idx]) {
+ return EBUSY;
+ }
+
+ /* Create datapath. */
+ xf_netdevs[xf_idx] = xf = xzalloc(sizeof *xf);
+ list_push_back(&xf_netdev_list, &xf->node);
+ xf->xf_idx = xf_idx;
+ xf->open_cnt = 0;
+ xf->drop_frags = false;
+ for (i = 0; i < N_QUEUES; i++) {
+ queue_init(&xf->queues[i]);
+ }
+ hmap_init(&xf->flow_table);
+ for (i = 0; i < N_GROUPS; i++) {
+ xf->groups[i].ports = NULL;
+ xf->groups[i].n_ports = 0;
+ xf->groups[i].group = i;
+ }
+ list_init(&xf->port_list);
+ error = do_add_port(xf, name, XFLOW_PORT_INTERNAL, XFLOWP_LOCAL);
+ if (error) {
+ xf_netdev_free(xf);
+ return ENODEV;
+ }
+
+ *xfifp = create_xfif_netdev(xf);
+ return 0;
+ }
+
+ static int
+ xfif_netdev_open(const char *name, const char *type OVS_UNUSED, bool create,
+ struct xfif **xfifp)
+ {
+ if (create) {
+ if (find_xf_netdev(name)) {
+ return EEXIST;
+ } else {
+ int xf_idx = name_to_xf_idx(name);
+ if (xf_idx >= 0) {
+ return create_xf_netdev(name, xf_idx, xfifp);
+ } else {
+ /* Scan for unused xf_idx number. */
+ for (xf_idx = 0; xf_idx < N_XF_NETDEVS; xf_idx++) {
+ int error = create_xf_netdev(name, xf_idx, xfifp);
+ if (error != EBUSY) {
+ return error;
+ }
+ }
+
+ /* All datapath numbers in use. */
+ return ENOBUFS;
+ }
+ }
+ } else {
+ struct xf_netdev *xf = find_xf_netdev(name);
+ if (xf) {
+ *xfifp = create_xfif_netdev(xf);
+ return 0;
+ } else {
+ return ENODEV;
+ }
+ }
+ }
+
+ static void
+ xf_netdev_free(struct xf_netdev *xf)
+ {
+ int i;
+
+ xf_netdev_flow_flush(xf);
+ while (xf->n_ports > 0) {
+ struct xf_netdev_port *port = CONTAINER_OF(
+ xf->port_list.next, struct xf_netdev_port, node);
+ do_del_port(xf, port->port_no);
+ }
+ for (i = 0; i < N_QUEUES; i++) {
+ queue_destroy(&xf->queues[i]);
+ }
+ hmap_destroy(&xf->flow_table);
+ for (i = 0; i < N_GROUPS; i++) {
+ free(xf->groups[i].ports);
+ }
+ xf_netdevs[xf->xf_idx] = NULL;
+ list_remove(&xf->node);
+ free(xf);
+ }
+
+ static void
+ xfif_netdev_close(struct xfif *xfif)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ assert(xf->open_cnt > 0);
+ if (--xf->open_cnt == 0 && xf->destroyed) {
+ xf_netdev_free(xf);
+ }
+ free(xfif);
+ }
+
+ static int
+ xfif_netdev_destroy(struct xfif *xfif)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ xf->destroyed = true;
+ return 0;
+ }
+
+ static int
+ xfif_netdev_get_stats(const struct xfif *xfif, struct xflow_stats *stats)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ memset(stats, 0, sizeof *stats);
+ stats->n_flows = hmap_count(&xf->flow_table);
+ stats->cur_capacity = hmap_capacity(&xf->flow_table);
+ stats->max_capacity = MAX_FLOWS;
+ stats->n_ports = xf->n_ports;
+ stats->max_ports = MAX_PORTS;
+ stats->max_groups = N_GROUPS;
+ stats->n_frags = xf->n_frags;
+ stats->n_hit = xf->n_hit;
+ stats->n_missed = xf->n_missed;
+ stats->n_lost = xf->n_lost;
+ stats->max_miss_queue = MAX_QUEUE_LEN;
+ stats->max_action_queue = MAX_QUEUE_LEN;
+ return 0;
+ }
+
+ static int
+ xfif_netdev_get_drop_frags(const struct xfif *xfif, bool *drop_fragsp)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ *drop_fragsp = xf->drop_frags;
+ return 0;
+ }
+
+ static int
+ xfif_netdev_set_drop_frags(struct xfif *xfif, bool drop_frags)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ xf->drop_frags = drop_frags;
+ return 0;
+ }
+
+ static int
+ do_add_port(struct xf_netdev *xf, const char *devname, uint16_t flags,
+ uint16_t port_no)
+ {
+ bool internal = (flags & XFLOW_PORT_INTERNAL) != 0;
+ struct xf_netdev_port *port;
+ struct netdev_options netdev_options;
+ struct netdev *netdev;
+ int mtu;
+ int error;
+
+ /* XXX reject devices already in some xf_netdev. */
+
+ /* Open and validate network device. */
+ memset(&netdev_options, 0, sizeof netdev_options);
+ netdev_options.name = devname;
+ netdev_options.ethertype = NETDEV_ETH_TYPE_ANY;
- } else {
- netdev_options.may_open = true;
+ if (internal) {
+ netdev_options.type = "tap";
+ }
+
+ error = netdev_open(&netdev_options, &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;
+
+ netdev_get_mtu(netdev, &mtu);
+ if (mtu > max_mtu) {
+ max_mtu = mtu;
+ }
+
+ list_push_back(&xf->port_list, &port->node);
+ xf->ports[port_no] = port;
+ xf->n_ports++;
+ xf->serial++;
+
+ return 0;
+ }
+
+ static int
+ xfif_netdev_port_add(struct xfif *xfif, const char *devname, uint16_t flags,
+ uint16_t *port_nop)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ int port_no;
+
+ for (port_no = 0; port_no < MAX_PORTS; port_no++) {
+ if (!xf->ports[port_no]) {
+ *port_nop = port_no;
+ return do_add_port(xf, devname, flags, port_no);
+ }
+ }
+ return EFBIG;
+ }
+
+ static int
+ xfif_netdev_port_del(struct xfif *xfif, uint16_t port_no)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ return port_no == XFLOWP_LOCAL ? EINVAL : do_del_port(xf, port_no);
+ }
+
+ static bool
+ is_valid_port_number(uint16_t port_no)
+ {
+ return port_no < MAX_PORTS;
+ }
+
+ static int
+ get_port_by_number(struct xf_netdev *xf,
+ uint16_t port_no, struct xf_netdev_port **portp)
+ {
+ if (!is_valid_port_number(port_no)) {
+ *portp = NULL;
+ return EINVAL;
+ } else {
+ *portp = xf->ports[port_no];
+ return *portp ? 0 : ENOENT;
+ }
+ }
+
+ static int
+ get_port_by_name(struct xf_netdev *xf,
+ const char *devname, struct xf_netdev_port **portp)
+ {
+ struct xf_netdev_port *port;
+
+ LIST_FOR_EACH (port, struct xf_netdev_port, node, &xf->port_list) {
+ if (!strcmp(netdev_get_name(port->netdev), devname)) {
+ *portp = port;
+ return 0;
+ }
+ }
+ return ENOENT;
+ }
+
+ static int
+ do_del_port(struct xf_netdev *xf, uint16_t port_no)
+ {
+ struct xf_netdev_port *port;
+ char *name;
+ int error;
+
+ error = get_port_by_number(xf, port_no, &port);
+ if (error) {
+ return error;
+ }
+
+ list_remove(&port->node);
+ xf->ports[port->port_no] = NULL;
+ xf->n_ports--;
+ xf->serial++;
+
+ name = xstrdup(netdev_get_name(port->netdev));
+ netdev_close(port->netdev);
+
+ free(name);
+ free(port);
+
+ return 0;
+ }
+
+ static void
+ answer_port_query(const struct xf_netdev_port *port, struct xflow_port *xflow_port)
+ {
+ memset(xflow_port, 0, sizeof *xflow_port);
+ ovs_strlcpy(xflow_port->devname, netdev_get_name(port->netdev),
+ sizeof xflow_port->devname);
+ xflow_port->port = port->port_no;
+ xflow_port->flags = port->internal ? XFLOW_PORT_INTERNAL : 0;
+ }
+
+ static int
+ xfif_netdev_port_query_by_number(const struct xfif *xfif, uint16_t port_no,
+ struct xflow_port *xflow_port)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct xf_netdev_port *port;
+ int error;
+
+ error = get_port_by_number(xf, port_no, &port);
+ if (!error) {
+ answer_port_query(port, xflow_port);
+ }
+ return error;
+ }
+
+ static int
+ xfif_netdev_port_query_by_name(const struct xfif *xfif, const char *devname,
+ struct xflow_port *xflow_port)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct xf_netdev_port *port;
+ int error;
+
+ error = get_port_by_name(xf, devname, &port);
+ if (!error) {
+ answer_port_query(port, xflow_port);
+ }
+ return error;
+ }
+
+ static void
+ xf_netdev_free_flow(struct xf_netdev *xf, struct xf_netdev_flow *flow)
+ {
+ hmap_remove(&xf->flow_table, &flow->node);
+ free(flow->actions);
+ free(flow);
+ }
+
+ static void
+ xf_netdev_flow_flush(struct xf_netdev *xf)
+ {
+ struct xf_netdev_flow *flow, *next;
+
+ HMAP_FOR_EACH_SAFE (flow, next, struct xf_netdev_flow, node,
+ &xf->flow_table) {
+ xf_netdev_free_flow(xf, flow);
+ }
+ }
+
+ static int
+ xfif_netdev_flow_flush(struct xfif *xfif)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ xf_netdev_flow_flush(xf);
+ return 0;
+ }
+
+ static int
+ xfif_netdev_port_list(const struct xfif *xfif, struct xflow_port *ports, int n)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct xf_netdev_port *port;
+ int i;
+
+ i = 0;
+ LIST_FOR_EACH (port, struct xf_netdev_port, node, &xf->port_list) {
+ struct xflow_port *xflow_port = &ports[i];
+ if (i >= n) {
+ break;
+ }
+ answer_port_query(port, xflow_port);
+ i++;
+ }
+ return xf->n_ports;
+ }
+
+ static int
+ xfif_netdev_port_poll(const struct xfif *xfif_, char **devnamep OVS_UNUSED)
+ {
+ struct xfif_netdev *xfif = xfif_netdev_cast(xfif_);
+ if (xfif->xf_serial != xfif->xf->serial) {
+ xfif->xf_serial = xfif->xf->serial;
+ return ENOBUFS;
+ } else {
+ return EAGAIN;
+ }
+ }
+
+ static void
+ xfif_netdev_port_poll_wait(const struct xfif *xfif_)
+ {
+ struct xfif_netdev *xfif = xfif_netdev_cast(xfif_);
+ if (xfif->xf_serial != xfif->xf->serial) {
+ poll_immediate_wake();
+ }
+ }
+
+ static int
+ get_port_group(const struct xfif *xfif, int group_no,
+ struct xflow_port_group **groupp)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+
+ if (group_no >= 0 && group_no < N_GROUPS) {
+ *groupp = &xf->groups[group_no];
+ return 0;
+ } else {
+ *groupp = NULL;
+ return EINVAL;
+ }
+ }
+
+ static int
+ xfif_netdev_port_group_get(const struct xfif *xfif, int group_no,
+ uint16_t ports[], int n)
+ {
+ struct xflow_port_group *group;
+ int error;
+
+ if (n < 0) {
+ return -EINVAL;
+ }
+
+ error = get_port_group(xfif, 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
+ xfif_netdev_port_group_set(struct xfif *xfif, int group_no,
+ const uint16_t ports[], int n)
+ {
+ struct xflow_port_group *group;
+ int error;
+
+ if (n < 0 || n > MAX_PORTS) {
+ return EINVAL;
+ }
+
+ error = get_port_group(xfif, 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 xf_netdev_flow *
+ xf_netdev_lookup_flow(const struct xf_netdev *xf,
+ const struct xflow_key *key)
+ {
+ struct xf_netdev_flow *flow;
+
+ HMAP_FOR_EACH_WITH_HASH (flow, struct xf_netdev_flow, node,
+ xflow_key_hash(key, 0), &xf->flow_table) {
+ if (xflow_key_equal(&flow->key, key)) {
+ return flow;
+ }
+ }
+ return NULL;
+ }
+
+ static void
+ answer_flow_query(struct xf_netdev_flow *flow, uint32_t query_flags,
+ struct xflow_flow *xflow_flow)
+ {
+ if (flow) {
+ xflow_flow->key = flow->key;
+ xflow_flow->stats.n_packets = flow->packet_count;
+ xflow_flow->stats.n_bytes = flow->byte_count;
+ xflow_flow->stats.used_sec = flow->used.tv_sec;
+ xflow_flow->stats.used_nsec = flow->used.tv_usec * 1000;
+ xflow_flow->stats.tcp_flags = TCP_FLAGS(flow->tcp_ctl);
+ xflow_flow->stats.ip_tos = flow->ip_tos;
+ xflow_flow->stats.error = 0;
+ if (xflow_flow->n_actions > 0) {
+ unsigned int n = MIN(xflow_flow->n_actions, flow->n_actions);
+ memcpy(xflow_flow->actions, flow->actions,
+ n * sizeof *xflow_flow->actions);
+ xflow_flow->n_actions = flow->n_actions;
+ }
+
+ if (query_flags & XFLOWFF_ZERO_TCP_FLAGS) {
+ flow->tcp_ctl = 0;
+ }
+
+ } else {
+ xflow_flow->stats.error = ENOENT;
+ }
+ }
+
+ static int
+ xfif_netdev_flow_get(const struct xfif *xfif, struct xflow_flow flows[], int n)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ int i;
+
+ for (i = 0; i < n; i++) {
+ struct xflow_flow *xflow_flow = &flows[i];
+ answer_flow_query(xf_netdev_lookup_flow(xf, &xflow_flow->key),
+ xflow_flow->flags, xflow_flow);
+ }
+ return 0;
+ }
+
+ static int
+ xfif_netdev_validate_actions(const union xflow_action *actions, int n_actions,
+ bool *mutates)
+ {
+ unsigned int i;
+
+ *mutates = false;
+ for (i = 0; i < n_actions; i++) {
+ const union xflow_action *a = &actions[i];
+ switch (a->type) {
+ case XFLOWAT_OUTPUT:
+ if (a->output.port >= MAX_PORTS) {
+ return EINVAL;
+ }
+ break;
+
+ case XFLOWAT_OUTPUT_GROUP:
+ *mutates = true;
+ if (a->output_group.group >= N_GROUPS) {
+ return EINVAL;
+ }
+ break;
+
+ case XFLOWAT_CONTROLLER:
+ break;
+
+ case XFLOWAT_SET_DL_TCI:
+ *mutates = true;
+ if (a->dl_tci.mask != htons(VLAN_VID_MASK)
+ && a->dl_tci.mask != htons(VLAN_PCP_MASK)
+ && a->dl_tci.mask != htons(VLAN_VID_MASK | VLAN_PCP_MASK)) {
+ return EINVAL;
+ }
+ if (a->dl_tci.tci & ~a->dl_tci.mask){
+ return EINVAL;
+ }
+ break;
+
+ case XFLOWAT_SET_NW_TOS:
+ *mutates = true;
+ if (a->nw_tos.nw_tos & IP_ECN_MASK) {
+ return EINVAL;
+ }
+ break;
+
+ case XFLOWAT_STRIP_VLAN:
+ case XFLOWAT_SET_DL_SRC:
+ case XFLOWAT_SET_DL_DST:
+ case XFLOWAT_SET_NW_SRC:
+ case XFLOWAT_SET_NW_DST:
+ case XFLOWAT_SET_TP_SRC:
+ case XFLOWAT_SET_TP_DST:
+ *mutates = true;
+ break;
+
+ default:
+ return EOPNOTSUPP;
+ }
+ }
+ return 0;
+ }
+
+ static int
+ set_flow_actions(struct xf_netdev_flow *flow, struct xflow_flow *xflow_flow)
+ {
+ size_t n_bytes;
+ bool mutates;
+ int error;
+
+ if (xflow_flow->n_actions >= 4096 / sizeof *xflow_flow->actions) {
+ return EINVAL;
+ }
+ error = xfif_netdev_validate_actions(xflow_flow->actions,
+ xflow_flow->n_actions, &mutates);
+ if (error) {
+ return error;
+ }
+
+ n_bytes = xflow_flow->n_actions * sizeof *flow->actions;
+ flow->actions = xrealloc(flow->actions, n_bytes);
+ flow->n_actions = xflow_flow->n_actions;
+ memcpy(flow->actions, xflow_flow->actions, n_bytes);
+ return 0;
+ }
+
+ static int
+ add_flow(struct xfif *xfif, struct xflow_flow *xflow_flow)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct xf_netdev_flow *flow;
+ int error;
+
+ flow = xzalloc(sizeof *flow);
+ flow->key = xflow_flow->key;
+
+ error = set_flow_actions(flow, xflow_flow);
+ if (error) {
+ free(flow);
+ return error;
+ }
+
+ hmap_insert(&xf->flow_table, &flow->node,
+ xflow_key_hash(&flow->key, 0));
+ return 0;
+ }
+
+ static void
+ clear_stats(struct xf_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
+ xfif_netdev_flow_put(struct xfif *xfif, struct xflow_flow_put *put)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct xf_netdev_flow *flow;
+
+ flow = xf_netdev_lookup_flow(xf, &put->flow.key);
+ if (!flow) {
+ if (put->flags & XFLOWPF_CREATE) {
+ if (hmap_count(&xf->flow_table) < MAX_FLOWS) {
+ return add_flow(xfif, &put->flow);
+ } else {
+ return EFBIG;
+ }
+ } else {
+ return ENOENT;
+ }
+ } else {
+ if (put->flags & XFLOWPF_MODIFY) {
+ int error = set_flow_actions(flow, &put->flow);
+ if (!error && put->flags & XFLOWPF_ZERO_STATS) {
+ clear_stats(flow);
+ }
+ return error;
+ } else {
+ return EEXIST;
+ }
+ }
+ }
+
+
+ static int
+ xfif_netdev_flow_del(struct xfif *xfif, struct xflow_flow *xflow_flow)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct xf_netdev_flow *flow;
+
+ flow = xf_netdev_lookup_flow(xf, &xflow_flow->key);
+ if (flow) {
+ answer_flow_query(flow, 0, xflow_flow);
+ xf_netdev_free_flow(xf, flow);
+ return 0;
+ } else {
+ return ENOENT;
+ }
+ }
+
+ static int
+ xfif_netdev_flow_list(const struct xfif *xfif, struct xflow_flow flows[], int n)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct xf_netdev_flow *flow;
+ int i;
+
+ i = 0;
+ HMAP_FOR_EACH (flow, struct xf_netdev_flow, node, &xf->flow_table) {
+ if (i >= n) {
+ break;
+ }
+ answer_flow_query(flow, 0, &flows[i++]);
+ }
+ return hmap_count(&xf->flow_table);
+ }
+
+ static int
+ xfif_netdev_execute(struct xfif *xfif, uint16_t in_port,
+ const union xflow_action actions[], int n_actions,
+ const struct ofpbuf *packet)
+ {
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ struct ofpbuf copy;
+ bool mutates;
+ struct xflow_key key;
+ flow_t flow;
+ int error;
+
+ if (packet->size < ETH_HEADER_LEN || packet->size > UINT16_MAX) {
+ return EINVAL;
+ }
+
+ error = xfif_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(©, XF_NETDEV_HEADROOM + packet->size);
+ copy.data = (char*)copy.base + XF_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(©, 0, in_port, &flow);
+ xflow_key_from_flow(&key, &flow);
+ error = xf_netdev_execute_actions(xf, ©, &key, actions, n_actions);
+ if (mutates) {
+ ofpbuf_uninit(©);
+ }
+ return error;
+ }
+
+ static int
+ xfif_netdev_recv_get_mask(const struct xfif *xfif, int *listen_mask)
+ {
+ struct xfif_netdev *xfif_netdev = xfif_netdev_cast(xfif);
+ *listen_mask = xfif_netdev->listen_mask;
+ return 0;
+ }
+
+ static int
+ xfif_netdev_recv_set_mask(struct xfif *xfif, int listen_mask)
+ {
+ struct xfif_netdev *xfif_netdev = xfif_netdev_cast(xfif);
+ if (!(listen_mask & ~XFLOWL_ALL)) {
+ xfif_netdev->listen_mask = listen_mask;
+ return 0;
+ } else {
+ return EINVAL;
+ }
+ }
+
+ static struct ovs_queue *
+ find_nonempty_queue(struct xfif *xfif)
+ {
+ struct xfif_netdev *xfif_netdev = xfif_netdev_cast(xfif);
+ struct xf_netdev *xf = get_xf_netdev(xfif);
+ int mask = xfif_netdev->listen_mask;
+ int i;
+
+ for (i = 0; i < N_QUEUES; i++) {
+ struct ovs_queue *q = &xf->queues[i];
+ if (q->n && mask & (1u << i)) {
+ return q;
+ }
+ }
+ return NULL;
+ }
+
+ static int
+ xfif_netdev_recv(struct xfif *xfif, struct ofpbuf **bufp)
+ {
+ struct ovs_queue *q = find_nonempty_queue(xfif);
+ if (q) {
+ *bufp = queue_pop_head(q);
+ return 0;
+ } else {
+ return EAGAIN;
+ }
+ }
+
+ static void
+ xfif_netdev_recv_wait(struct xfif *xfif)
+ {
+ struct ovs_queue *q = find_nonempty_queue(xfif);
+ if (q) {
+ poll_immediate_wake();
+ } else {
+ /* No messages ready to be received, and xf_wait() will ensure that we
+ * wake up to queue new messages, so there is nothing to do. */
+ }
+ }
+ \f
+ static void
+ xf_netdev_flow_used(struct xf_netdev_flow *flow,
+ const struct xflow_key *key,
+ const struct ofpbuf *packet)
+ {
+ time_timeval(&flow->used);
+ flow->packet_count++;
+ flow->byte_count += packet->size;
+ if (key->dl_type == htons(ETH_TYPE_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
+ xf_netdev_port_input(struct xf_netdev *xf, struct xf_netdev_port *port,
+ struct ofpbuf *packet)
+ {
+ struct xf_netdev_flow *flow;
+ struct xflow_key key;
+ flow_t f;
+
+ if (flow_extract(packet, 0, port->port_no, &f) && xf->drop_frags) {
+ xf->n_frags++;
+ return;
+ }
+ xflow_key_from_flow(&key, &f);
+
+ flow = xf_netdev_lookup_flow(xf, &key);
+ if (flow) {
+ xf_netdev_flow_used(flow, &key, packet);
+ xf_netdev_execute_actions(xf, packet, &key,
+ flow->actions, flow->n_actions);
+ xf->n_hit++;
+ } else {
+ xf->n_missed++;
+ xf_netdev_output_control(xf, packet, _XFLOWL_MISS_NR, port->port_no, 0);
+ }
+ }
+
+ static void
+ xf_netdev_run(void)
+ {
+ struct ofpbuf packet;
+ struct xf_netdev *xf;
+
+ ofpbuf_init(&packet, XF_NETDEV_HEADROOM + max_mtu);
+ LIST_FOR_EACH (xf, struct xf_netdev, node, &xf_netdev_list) {
+ struct xf_netdev_port *port;
+
+ LIST_FOR_EACH (port, struct xf_netdev_port, node, &xf->port_list) {
+ int error;
+
+ /* Reset packet contents. */
+ packet.data = (char*)packet.base + XF_NETDEV_HEADROOM;
+ packet.size = 0;
+
+ error = netdev_recv(port->netdev, &packet);
+ if (!error) {
+ xf_netdev_port_input(xf, 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
+ xf_netdev_wait(void)
+ {
+ struct xf_netdev *xf;
+
+ LIST_FOR_EACH (xf, struct xf_netdev, node, &xf_netdev_list) {
+ struct xf_netdev_port *port;
+ LIST_FOR_EACH (port, struct xf_netdev_port, node, &xf->port_list) {
+ netdev_recv_wait(port->netdev);
+ }
+ }
+ }
+
+
+ /* Modify or add a 802.1Q header in 'packet' according to 'a'. */
+ static void
+ xf_netdev_set_dl_tci(struct ofpbuf *packet, struct xflow_key *key,
+ const struct xflow_action_dl_tci *a)
+ {
+ struct vlan_eth_header *veh;
+
+ if (key->dl_tci) {
+ veh = packet->l2;
+ veh->veth_tci = (veh->veth_tci & ~a->mask) | a->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(a->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_tci = veh->veth_tci | htons(XFLOW_TCI_PRESENT);
+ }
+
+ static void
+ xf_netdev_strip_vlan(struct ofpbuf *packet, struct xflow_key *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_tci = htons(0);
+ }
+ }
+
+ static void
+ xf_netdev_set_dl_src(struct ofpbuf *packet, struct xflow_key *key,
+ const uint8_t dl_addr[ETH_ADDR_LEN])
+ {
+ struct eth_header *eh = packet->l2;
+ memcpy(eh->eth_src, dl_addr, sizeof eh->eth_src);
+ memcpy(key->dl_src, dl_addr, sizeof key->dl_src);
+ }
+
+ static void
+ xf_netdev_set_dl_dst(struct ofpbuf *packet, struct xflow_key *key,
+ const uint8_t dl_addr[ETH_ADDR_LEN])
+ {
+ struct eth_header *eh = packet->l2;
+ memcpy(eh->eth_dst, dl_addr, sizeof eh->eth_dst);
+ memcpy(key->dl_dst, dl_addr, sizeof key->dl_dst);
+ }
+
+ static void
+ xf_netdev_set_nw_addr(struct ofpbuf *packet, struct xflow_key *key,
+ const struct xflow_action_nw_addr *a)
+ {
+ if (key->dl_type == htons(ETH_TYPE_IP)) {
+ struct ip_header *nh = packet->l3;
+ uint32_t *field;
+
+ field = a->type == XFLOWAT_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;
+
+ if (a->type == XFLOWAT_SET_NW_SRC) {
+ key->nw_src = a->type;
+ } else {
+ key->nw_dst = a->type;
+ }
+ }
+ }
+
+ static void
+ xf_netdev_set_nw_tos(struct ofpbuf *packet, struct xflow_key *key,
+ const struct xflow_action_nw_tos *a)
+ {
+ if (key->dl_type == htons(ETH_TYPE_IP)) {
+ struct ip_header *nh = packet->l3;
+ uint8_t *field = &nh->ip_tos;
+
+ /* Set the DSCP bits and preserve the ECN bits. */
+ uint8_t new = a->nw_tos | (nh->ip_tos & IP_ECN_MASK);
+
+ nh->ip_csum = recalc_csum16(nh->ip_csum, htons((uint16_t)*field),
+ htons((uint16_t)a->nw_tos));
+ *field = new;
+ key->nw_tos = a->nw_tos;
+ }
+ }
+
+ static void
+ xf_netdev_set_tp_port(struct ofpbuf *packet, struct xflow_key *key,
+ const struct xflow_action_tp_port *a)
+ {
+ if (key->dl_type == htons(ETH_TYPE_IP)) {
+ uint16_t *field;
+ if (key->nw_proto == IPPROTO_TCP) {
+ struct tcp_header *th = packet->l4;
+ field = a->type == XFLOWAT_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 == XFLOWAT_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;
+ } else {
+ return;
+ }
+
+ if (a->type == XFLOWAT_SET_TP_SRC) {
+ key->tp_src = a->tp_port;
+ } else {
+ key->tp_dst = a->tp_port;
+ }
+ }
+ }
+
+ static void
+ xf_netdev_output_port(struct xf_netdev *xf, struct ofpbuf *packet,
+ uint16_t out_port)
+ {
+ struct xf_netdev_port *p = xf->ports[out_port];
+ if (p) {
+ netdev_send(p->netdev, packet);
+ }
+ }
+
+ static void
+ xf_netdev_output_group(struct xf_netdev *xf, uint16_t group, uint16_t in_port,
+ struct ofpbuf *packet)
+ {
+ struct xflow_port_group *g = &xf->groups[group];
+ int i;
+
+ for (i = 0; i < g->n_ports; i++) {
+ uint16_t out_port = g->ports[i];
+ if (out_port != in_port) {
+ xf_netdev_output_port(xf, packet, out_port);
+ }
+ }
+ }
+
+ static int
+ xf_netdev_output_control(struct xf_netdev *xf, const struct ofpbuf *packet,
+ int queue_no, int port_no, uint32_t arg)
+ {
+ struct ovs_queue *q = &xf->queues[queue_no];
+ struct xflow_msg *header;
+ struct ofpbuf *msg;
+ size_t msg_size;
+
+ if (q->n >= MAX_QUEUE_LEN) {
+ xf->n_lost++;
+ return ENOBUFS;
+ }
+
+ msg_size = sizeof *header + packet->size;
+ msg = ofpbuf_new(msg_size + XFIF_RECV_MSG_PADDING);
+ header = ofpbuf_put_uninit(msg, sizeof *header);
+ ofpbuf_reserve(msg, XFIF_RECV_MSG_PADDING);
+ 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
+ xf_netdev_execute_actions(struct xf_netdev *xf,
+ struct ofpbuf *packet, struct xflow_key *key,
+ const union xflow_action *actions, int n_actions)
+ {
+ int i;
+ for (i = 0; i < n_actions; i++) {
+ const union xflow_action *a = &actions[i];
+
+ switch (a->type) {
+ case XFLOWAT_OUTPUT:
+ xf_netdev_output_port(xf, packet, a->output.port);
+ break;
+
+ case XFLOWAT_OUTPUT_GROUP:
+ xf_netdev_output_group(xf, a->output_group.group, key->in_port,
+ packet);
+ break;
+
+ case XFLOWAT_CONTROLLER:
+ xf_netdev_output_control(xf, packet, _XFLOWL_ACTION_NR,
+ key->in_port, a->controller.arg);
+ break;
+
+ case XFLOWAT_SET_DL_TCI:
+ xf_netdev_set_dl_tci(packet, key, &a->dl_tci);
+ break;
+
+ case XFLOWAT_STRIP_VLAN:
+ xf_netdev_strip_vlan(packet, key);
+ break;
+
+ case XFLOWAT_SET_DL_SRC:
+ xf_netdev_set_dl_src(packet, key, a->dl_addr.dl_addr);
+ break;
+
+ case XFLOWAT_SET_DL_DST:
+ xf_netdev_set_dl_dst(packet, key, a->dl_addr.dl_addr);
+ break;
+
+ case XFLOWAT_SET_NW_SRC:
+ case XFLOWAT_SET_NW_DST:
+ xf_netdev_set_nw_addr(packet, key, &a->nw_addr);
+ break;
+
+ case XFLOWAT_SET_NW_TOS:
+ xf_netdev_set_nw_tos(packet, key, &a->nw_tos);
+ break;
+
+ case XFLOWAT_SET_TP_SRC:
+ case XFLOWAT_SET_TP_DST:
+ xf_netdev_set_tp_port(packet, key, &a->tp_port);
+ break;
+ }
+ }
+ return 0;
+ }
+
+ const struct xfif_class xfif_netdev_class = {
+ "netdev",
+ xf_netdev_run,
+ xf_netdev_wait,
+ NULL, /* enumerate */
+ xfif_netdev_open,
+ xfif_netdev_close,
+ NULL, /* get_all_names */
+ xfif_netdev_destroy,
+ xfif_netdev_get_stats,
+ xfif_netdev_get_drop_frags,
+ xfif_netdev_set_drop_frags,
+ xfif_netdev_port_add,
+ xfif_netdev_port_del,
+ xfif_netdev_port_query_by_number,
+ xfif_netdev_port_query_by_name,
+ xfif_netdev_port_list,
+ xfif_netdev_port_poll,
+ xfif_netdev_port_poll_wait,
+ xfif_netdev_port_group_get,
+ xfif_netdev_port_group_set,
+ xfif_netdev_flow_get,
+ xfif_netdev_flow_put,
+ xfif_netdev_flow_del,
+ xfif_netdev_flow_flush,
+ xfif_netdev_flow_list,
+ xfif_netdev_execute,
+ xfif_netdev_recv_get_mask,
+ xfif_netdev_recv_set_mask,
+ NULL, /* get_sflow_probability */
+ NULL, /* set_sflow_probability */
+ xfif_netdev_recv,
+ xfif_netdev_recv_wait,
+ };
--- /dev/null
- netdev_options.may_create = true;
- netdev_options.may_open = true;
+ /*
+ * Copyright (c) 2010 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 "wdp-xflow.h"
+
+ #include <errno.h>
+ #include <inttypes.h>
+
+ #include "coverage.h"
+ #include "dhcp.h"
+ #include "netdev.h"
+ #include "netflow.h"
+ #include "ofpbuf.h"
+ #include "openflow/nicira-ext.h"
+ #include "openflow/openflow.h"
+ #include "packets.h"
+ #include "poll-loop.h"
+ #include "port-array.h"
+ #include "shash.h"
+ #include "stp.h"
+ #include "svec.h"
+ #include "timeval.h"
+ #include "util.h"
+ #include "vconn.h"
+ #include "wdp-provider.h"
+ #include "xfif.h"
+ #include "xflow-util.h"
+ #include "xtoxll.h"
+
+ #define THIS_MODULE VLM_wdp_xflow
+ #include "vlog.h"
+
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+ \f
+ /* Maximum numbers of rules. */
+ #define WX_MAX_WILD 65536 /* Wildcarded rules. */
+ #define WX_MAX_EXACT 1048576 /* Exact-match rules. */
+
+ struct wx {
+ struct list list_node;
+ struct wdp wdp;
+ struct xfif *xfif;
+ struct classifier cls;
+ struct netdev_monitor *netdev_monitor;
+ struct port_array ports; /* Index is ODP port nr; wdp_port->opp.port_no
+ * is OFP port nr. */
+ struct shash port_by_name;
+ bool need_revalidate;
+ long long int next_expiration;
+ };
+
+ static struct list all_wx = LIST_INITIALIZER(&all_wx);
+
+ static int wx_port_init(struct wx *);
+ static void wx_port_run(struct wx *);
+ static void wx_port_refresh_groups(struct wx *);
+
+ enum {
+ WX_GROUP_FLOOD = 0,
+ WX_GROUP_ALL = 1
+ };
+
+ static struct wx *
+ wx_cast(const struct wdp *wdp)
+ {
+ return CONTAINER_OF(wdp, struct wx, wdp);
+ }
+
+ static int
+ wx_xlate_actions(struct wx *, const union ofp_action *, size_t n,
+ const flow_t *flow, const struct ofpbuf *packet,
+ struct xflow_actions *out, bool *may_set_up_flow);
+ \f
+ struct wx_rule {
+ struct wdp_rule wr;
+
+ uint64_t packet_count; /* Number of packets received. */
+ uint64_t byte_count; /* Number of bytes received. */
+ uint64_t accounted_bytes; /* Number of bytes passed to account_cb. */
+ long long int used; /* Last-used time (0 if never used). */
+
+ /* If 'super' is non-NULL, this rule is a subrule, that is, it is an
+ * exact-match rule (having cr.wc.wildcards of 0) generated from the
+ * wildcard rule 'super'. In this case, 'list' is an element of the
+ * super-rule's list.
+ *
+ * If 'super' is NULL, this rule is a super-rule, and 'list' is the head of
+ * a list of subrules. A super-rule with no wildcards (where
+ * cr.wc.wildcards is 0) will never have any subrules. */
+ struct wx_rule *super;
+ struct list list;
+
+ /* Datapath actions.
+ *
+ * A super-rule with wildcard fields never has XFLOW actions (since the
+ * datapath only supports exact-match flows). */
+ bool installed; /* Installed in datapath? */
+ bool may_install; /* True ordinarily; false if actions must
+ * be reassessed for every packet. */
+ int n_xflow_actions;
+ union xflow_action *xflow_actions;
+ };
+
+ static void wx_rule_destroy(struct wx *, struct wx_rule *);
+ static void wx_rule_update_actions(struct wx *, struct wx_rule *);
+ static void wx_rule_execute(struct wx *, struct wx_rule *,
+ struct ofpbuf *packet, const flow_t *);
+ static bool wx_rule_make_actions(struct wx *, struct wx_rule *,
+ const struct ofpbuf *packet);
+ static void wx_rule_install(struct wx *, struct wx_rule *,
+ struct wx_rule *displaced_rule);
+
+ static struct wx_rule *
+ wx_rule_cast(const struct cls_rule *cls_rule)
+ {
+ return cls_rule ? CONTAINER_OF(cls_rule, struct wx_rule, wr.cr) : NULL;
+ }
+
+ /* Returns true if 'rule' is merely an implementation detail that should be
+ * hidden from the client. */
+ static inline bool
+ wx_rule_is_hidden(const struct wx_rule *rule)
+ {
+ return rule->super != NULL;
+ }
+
+ static void
+ wx_rule_free(struct wx_rule *rule)
+ {
+ wdp_rule_uninit(&rule->wr);
+ free(rule->xflow_actions);
+ free(rule);
+ }
+
+ static void
+ wx_rule_account(struct wx *wx OVS_UNUSED, struct wx_rule *rule OVS_UNUSED,
+ uint64_t extra_bytes OVS_UNUSED)
+ {
+ /* XXX call account_cb hook */
+ }
+
+ static void
+ wx_rule_post_uninstall(struct wx *wx, struct wx_rule *rule)
+ {
+ struct wx_rule *super = rule->super;
+
+ wx_rule_account(wx, rule, 0);
+
+ /* XXX netflow expiration */
+
+ if (super) {
+ super->packet_count += rule->packet_count;
+ super->byte_count += rule->byte_count;
+
+ /* Reset counters to prevent double counting if the rule ever gets
+ * reinstalled. */
+ rule->packet_count = 0;
+ rule->byte_count = 0;
+ rule->accounted_bytes = 0;
+
+ //XXX netflow_flow_clear(&rule->nf_flow);
+ }
+ }
+
+ static long long int
+ xflow_flow_stats_to_msec(const struct xflow_flow_stats *stats)
+ {
+ return (stats->used_sec
+ ? stats->used_sec * 1000 + stats->used_nsec / 1000000
+ : 0);
+ }
+
+ static void
+ wx_rule_update_time(struct wx *wx OVS_UNUSED, struct wx_rule *rule,
+ const struct xflow_flow_stats *stats)
+ {
+ long long int used = xflow_flow_stats_to_msec(stats);
+ if (used > rule->used) {
+ rule->used = used;
+ if (rule->super && used > rule->super->used) {
+ rule->super->used = used;
+ }
+ //XXX netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, used);
+ }
+ }
+
+ static void
+ wx_rule_update_stats(struct wx *wx, struct wx_rule *rule,
+ const struct xflow_flow_stats *stats)
+ {
+ if (stats->n_packets) {
+ wx_rule_update_time(wx, rule, stats);
+ rule->packet_count += stats->n_packets;
+ rule->byte_count += stats->n_bytes;
+ /* XXX netflow_flow_update_flags(&rule->nf_flow, stats->ip_tos,
+ stats->tcp_flags); */
+ }
+ }
+
+ static void
+ wx_rule_uninstall(struct wx *wx, struct wx_rule *rule)
+ {
+ assert(!rule->wr.cr.flow.wildcards);
+ if (rule->installed) {
+ struct xflow_flow xflow_flow;
+
+ xflow_key_from_flow(&xflow_flow.key, &rule->wr.cr.flow);
+ xflow_flow.actions = NULL;
+ xflow_flow.n_actions = 0;
+ xflow_flow.flags = 0;
+ if (!xfif_flow_del(wx->xfif, &xflow_flow)) {
+ wx_rule_update_stats(wx, rule, &xflow_flow.stats);
+ }
+ rule->installed = false;
+
+ wx_rule_post_uninstall(wx, rule);
+ }
+ }
+
+ #if 0
+ static bool
+ is_controller_rule(struct wx_rule *rule)
+ {
+ /* If the only action is send to the controller then don't report
+ * NetFlow expiration messages since it is just part of the control
+ * logic for the network and not real traffic. */
+
+ if (rule && rule->super) {
+ struct wdp_rule *super = &rule->super->wr;
+
+ return super->n_actions == 1 &&
+ super->actions[0].type == htons(OFPAT_OUTPUT) &&
+ super->actions[0].output.port == htons(OFPP_CONTROLLER);
+ }
+
+ return false;
+ }
+ #endif
+
+ static void
+ wx_rule_remove(struct wx *wx, struct wx_rule *rule)
+ {
+ if (rule->wr.cr.flow.wildcards) {
+ COVERAGE_INC(wx_del_wc_flow);
+ wx->need_revalidate = true;
+ } else {
+ wx_rule_uninstall(wx, rule);
+ }
+ classifier_remove(&wx->cls, &rule->wr.cr);
+ wx_rule_destroy(wx, rule);
+ }
+
+ static bool
+ wx_rule_revalidate(struct wx *wx, struct wx_rule *rule)
+ {
+ const flow_t *flow = &rule->wr.cr.flow;
+
+ COVERAGE_INC(wx_rule_revalidate);
+ if (rule->super) {
+ struct wx_rule *super;
+ super = wx_rule_cast(classifier_lookup_wild(&wx->cls, flow));
+ if (!super) {
+ wx_rule_remove(wx, rule);
+ return false;
+ } else if (super != rule->super) {
+ COVERAGE_INC(wx_revalidate_moved);
+ list_remove(&rule->list);
+ list_push_back(&super->list, &rule->list);
+ rule->super = super;
+ rule->wr.hard_timeout = super->wr.hard_timeout;
+ rule->wr.idle_timeout = super->wr.idle_timeout;
+ rule->wr.created = super->wr.created;
+ rule->used = 0;
+ }
+ }
+
+ wx_rule_update_actions(wx, rule);
+ return true;
+ }
+
+ /* Destroys 'rule'. If 'rule' is a subrule, also removes it from its
+ * super-rule's list of subrules. If 'rule' is a super-rule, also iterates
+ * through all of its subrules and revalidates them, destroying any that no
+ * longer has a super-rule (which is probably all of them).
+ *
+ * Before calling this function, the caller must make have removed 'rule' from
+ * the classifier. If 'rule' is an exact-match rule, the caller is also
+ * responsible for ensuring that it has been uninstalled from the datapath. */
+ static void
+ wx_rule_destroy(struct wx *wx, struct wx_rule *rule)
+ {
+ if (!rule->super) {
+ struct wx_rule *subrule, *next;
+ LIST_FOR_EACH_SAFE (subrule, next, struct wx_rule, list, &rule->list) {
+ wx_rule_revalidate(wx, subrule);
+ }
+ } else {
+ list_remove(&rule->list);
+ }
+ wx_rule_free(rule);
+ }
+
+ #if 0
+ static bool
+ wx_rule_has_out_port(const struct wx_rule *rule, uint16_t out_port)
+ {
+ const union ofp_action *oa;
+ struct actions_iterator i;
+
+ if (out_port == htons(OFPP_NONE)) {
+ return true;
+ }
+ for (oa = actions_first(&i, rule->wr.actions,
+ rule->wr.n_actions);
+ oa;
+ oa = actions_next(&i)) {
+ if (oa->type == htons(OFPAT_OUTPUT) && oa->output.port == out_port) {
+ return true;
+ }
+ }
+ return false;
+ }
+ #endif
+
+ /* Caller is responsible for initializing the 'cr' member of the returned
+ * rule. */
+ static struct wx_rule *
+ wx_rule_create(struct wx_rule *super,
+ const union ofp_action *actions, size_t n_actions,
+ uint16_t idle_timeout, uint16_t hard_timeout)
+ {
+ struct wx_rule *rule = xzalloc(sizeof *rule);
+ wdp_rule_init(&rule->wr, actions, n_actions);
+ rule->wr.idle_timeout = idle_timeout;
+ rule->wr.hard_timeout = hard_timeout;
+ rule->used = rule->wr.created;
+ rule->super = super;
+ if (super) {
+ list_push_back(&super->list, &rule->list);
+ } else {
+ list_init(&rule->list);
+ }
+ #if 0
+ netflow_flow_clear(&rule->nf_flow);
+ netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->created);
+ #endif
+
+ return rule;
+ }
+
+ /* Executes the actions indicated by 'rule' on 'packet', which is in flow
+ * 'flow' and is considered to have arrived on XFLOW port 'in_port'.
+ *
+ * The flow that 'packet' actually contains does not need to actually match
+ * 'rule'; the actions in 'rule' will be applied to it either way. Likewise,
+ * the packet and byte counters for 'rule' will be credited for the packet sent
+ * out whether or not the packet actually matches 'rule'.
+ *
+ * If 'rule' is an exact-match rule and 'flow' actually equals the rule's flow,
+ * the caller must already have accurately composed XFLOW actions for it given
+ * 'packet' using rule_make_actions(). If 'rule' is a wildcard rule, or if
+ * 'rule' is an exact-match rule but 'flow' is not the rule's flow, then this
+ * function will compose a set of XFLOW actions based on 'rule''s OpenFlow
+ * actions and apply them to 'packet'. */
+ static void
+ wx_rule_execute(struct wx *wx, struct wx_rule *rule,
+ struct ofpbuf *packet, const flow_t *flow)
+ {
+ const union xflow_action *actions;
+ size_t n_actions;
+ struct xflow_actions a;
+
+ /* Grab or compose the XFLOW actions.
+ *
+ * The special case for an exact-match 'rule' where 'flow' is not the
+ * rule's flow is important to avoid, e.g., sending a packet out its input
+ * port simply because the XFLOW actions were composed for the wrong
+ * scenario. */
+ if (rule->wr.cr.flow.wildcards
+ || !flow_equal(flow, &rule->wr.cr.flow))
+ {
+ struct wx_rule *super = rule->super ? rule->super : rule;
+ if (wx_xlate_actions(wx, super->wr.actions, super->wr.n_actions, flow,
+ packet, &a, NULL)) {
+ return;
+ }
+ actions = a.actions;
+ n_actions = a.n_actions;
+ } else {
+ actions = rule->xflow_actions;
+ n_actions = rule->n_xflow_actions;
+ }
+
+ /* Execute the XFLOW actions. */
+ if (!xfif_execute(wx->xfif, flow->in_port,
+ actions, n_actions, packet)) {
+ struct xflow_flow_stats stats;
+ flow_extract_stats(flow, packet, &stats);
+ wx_rule_update_stats(wx, rule, &stats);
+ rule->used = time_msec();
+ //XXX netflow_flow_update_time(wx->netflow, &rule->nf_flow, rule->used);
+ }
+ }
+
+ static void
+ wx_rule_insert(struct wx *wx, struct wx_rule *rule, struct ofpbuf *packet,
+ uint16_t in_port)
+ {
+ struct wx_rule *displaced_rule;
+
+ /* Insert the rule in the classifier. */
+ displaced_rule = wx_rule_cast(classifier_insert(&wx->cls, &rule->wr.cr));
+ if (!rule->wr.cr.flow.wildcards) {
+ wx_rule_make_actions(wx, rule, packet);
+ }
+
+ /* Send the packet and credit it to the rule. */
+ if (packet) {
+ flow_t flow;
+ flow_extract(packet, 0, in_port, &flow);
+ wx_rule_execute(wx, rule, packet, &flow);
+ }
+
+ /* Install the rule in the datapath only after sending the packet, to
+ * avoid packet reordering. */
+ if (rule->wr.cr.flow.wildcards) {
+ COVERAGE_INC(wx_add_wc_flow);
+ wx->need_revalidate = true;
+ } else {
+ wx_rule_install(wx, rule, displaced_rule);
+ }
+
+ /* Free the rule that was displaced, if any. */
+ if (displaced_rule) {
+ rule->wr.client_data = displaced_rule->wr.client_data;
+ wx_rule_destroy(wx, displaced_rule);
+ }
+ }
+
+ static struct wx_rule *
+ wx_rule_create_subrule(struct wx *wx, struct wx_rule *rule, const flow_t *flow)
+ {
+ struct wx_rule *subrule;
+
+ subrule = wx_rule_create(rule, NULL, 0,
+ rule->wr.idle_timeout,
+ rule->wr.hard_timeout);
+ COVERAGE_INC(wx_subrule_create);
+ cls_rule_from_flow(flow, &subrule->wr.cr);
+ classifier_insert_exact(&wx->cls, &subrule->wr.cr);
+
+ return subrule;
+ }
+
+ /* Returns true if the actions changed, false otherwise. */
+ static bool
+ wx_rule_make_actions(struct wx *wx, struct wx_rule *rule,
+ const struct ofpbuf *packet)
+ {
+ const struct wx_rule *super;
+ struct xflow_actions a;
+ size_t actions_len;
+
+ assert(!rule->wr.cr.flow.wildcards);
+
+ super = rule->super ? rule->super : rule;
+ wx_xlate_actions(wx, super->wr.actions, super->wr.n_actions,
+ &rule->wr.cr.flow, packet, &a, &rule->may_install);
+
+ actions_len = a.n_actions * sizeof *a.actions;
+ if (rule->n_xflow_actions != a.n_actions
+ || memcmp(rule->xflow_actions, a.actions, actions_len)) {
+ COVERAGE_INC(wx_xflow_unchanged);
+ free(rule->xflow_actions);
+ rule->n_xflow_actions = a.n_actions;
+ rule->xflow_actions = xmemdup(a.actions, actions_len);
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ static int
+ do_put_flow(struct wx *wx, struct wx_rule *rule, int flags,
+ struct xflow_flow_put *put)
+ {
+ memset(&put->flow.stats, 0, sizeof put->flow.stats);
+ xflow_key_from_flow(&put->flow.key, &rule->wr.cr.flow);
+ put->flow.actions = rule->xflow_actions;
+ put->flow.n_actions = rule->n_xflow_actions;
+ put->flow.flags = 0;
+ put->flags = flags;
+ return xfif_flow_put(wx->xfif, put);
+ }
+
+ static void
+ wx_rule_install(struct wx *wx, struct wx_rule *rule, struct wx_rule *displaced_rule)
+ {
+ assert(!rule->wr.cr.flow.wildcards);
+
+ if (rule->may_install) {
+ struct xflow_flow_put put;
+ if (!do_put_flow(wx, rule,
+ XFLOWPF_CREATE | XFLOWPF_MODIFY | XFLOWPF_ZERO_STATS,
+ &put)) {
+ rule->installed = true;
+ if (displaced_rule) {
+ wx_rule_update_stats(wx, displaced_rule, &put.flow.stats);
+ wx_rule_post_uninstall(wx, displaced_rule);
+ }
+ }
+ } else if (displaced_rule) {
+ wx_rule_uninstall(wx, displaced_rule);
+ }
+ }
+
+ static void
+ wx_rule_reinstall(struct wx *wx, struct wx_rule *rule)
+ {
+ if (rule->installed) {
+ struct xflow_flow_put put;
+ COVERAGE_INC(wx_dp_missed);
+ do_put_flow(wx, rule, XFLOWPF_CREATE | XFLOWPF_MODIFY, &put);
+ } else {
+ wx_rule_install(wx, rule, NULL);
+ }
+ }
+
+ static void
+ wx_rule_update_actions(struct wx *wx, struct wx_rule *rule)
+ {
+ bool actions_changed;
+ #if 0
+ uint16_t new_out_iface, old_out_iface;
+
+ old_out_iface = rule->nf_flow.output_iface;
+ #endif
+ actions_changed = wx_rule_make_actions(wx, rule, NULL);
+
+ if (rule->may_install) {
+ if (rule->installed) {
+ if (actions_changed) {
+ struct xflow_flow_put put;
+ do_put_flow(wx, rule, XFLOWPF_CREATE | XFLOWPF_MODIFY
+ | XFLOWPF_ZERO_STATS, &put);
+ wx_rule_update_stats(wx, rule, &put.flow.stats);
+ #if 0
+ /* Temporarily set the old output iface so that NetFlow
+ * messages have the correct output interface for the old
+ * stats. */
+ new_out_iface = rule->nf_flow.output_iface;
+ rule->nf_flow.output_iface = old_out_iface;
+ #endif
+ wx_rule_post_uninstall(wx, rule);
+ //rule->nf_flow.output_iface = new_out_iface;
+ }
+ } else {
+ wx_rule_install(wx, rule, NULL);
+ }
+ } else {
+ wx_rule_uninstall(wx, rule);
+ }
+ }
+ \f
+ static void
+ add_output_group_action(struct xflow_actions *actions, uint16_t group,
+ uint16_t *nf_output_iface)
+ {
+ xflow_actions_add(actions, XFLOWAT_OUTPUT_GROUP)->output_group.group = group;
+
+ if (group == WX_GROUP_ALL || group == WX_GROUP_FLOOD) {
+ *nf_output_iface = NF_OUT_FLOOD;
+ }
+ }
+
+ static void
+ add_controller_action(struct xflow_actions *actions,
+ const struct ofp_action_output *oao)
+ {
+ union xflow_action *a = xflow_actions_add(actions, XFLOWAT_CONTROLLER);
+ a->controller.arg = ntohs(oao->max_len);
+ }
+
+ struct wx_xlate_ctx {
+ /* Input. */
+ flow_t flow; /* Flow to which these actions correspond. */
+ int recurse; /* Recursion level, via xlate_table_action. */
+ struct wx *wx;
+ const struct ofpbuf *packet; /* The packet corresponding to 'flow', or a
+ * null pointer if we are revalidating
+ * without a packet to refer to. */
+
+ /* Output. */
+ struct xflow_actions *out; /* Datapath actions. */
+ //tag_type *tags; /* Tags associated with OFPP_NORMAL actions. */
+ bool may_set_up_flow; /* True ordinarily; false if the actions must
+ * be reassessed for every packet. */
+ uint16_t nf_output_iface; /* Output interface index for NetFlow. */
+ };
+
+ static void do_xlate_actions(const union ofp_action *in, size_t n_in,
+ struct wx_xlate_ctx *ctx);
+
+ static void
+ add_output_action(struct wx_xlate_ctx *ctx, uint16_t port)
+ {
+ const struct wdp_port *wdp_port = port_array_get(&ctx->wx->ports, port);
+
+ if (wdp_port) {
+ if (wdp_port->opp.config & OFPPC_NO_FWD) {
+ /* Forwarding disabled on port. */
+ return;
+ }
+ } else {
+ /*
+ * We don't have an ofport record for this port, but it doesn't hurt to
+ * allow forwarding to it anyhow. Maybe such a port will appear later
+ * and we're pre-populating the flow table.
+ */
+ }
+
+ xflow_actions_add(ctx->out, XFLOWAT_OUTPUT)->output.port = port;
+ //ctx->nf_output_iface = port;
+ }
+
+ static struct wx_rule *
+ wx_rule_lookup_valid(struct wx *wx, const flow_t *flow)
+ {
+ struct wx_rule *rule = wx_rule_cast(classifier_lookup(&wx->cls, flow));
+
+ /* The rule we found might not be valid, since we could be in need of
+ * revalidation. If it is not valid, don't return it. */
+ if (rule
+ && rule->super
+ && wx->need_revalidate
+ && !wx_rule_revalidate(wx, rule)) {
+ COVERAGE_INC(wx_invalidated);
+ return NULL;
+ }
+
+ return rule;
+ }
+
+ static void
+ xlate_table_action(struct wx_xlate_ctx *ctx, uint16_t in_port)
+ {
+ if (!ctx->recurse) {
+ uint16_t old_in_port;
+ struct wx_rule *rule;
+
+ /* Look up a flow with 'in_port' as the input port. Then restore the
+ * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
+ * have surprising behavior). */
+ old_in_port = ctx->flow.in_port;
+ ctx->flow.in_port = in_port;
+ rule = wx_rule_lookup_valid(ctx->wx, &ctx->flow);
+ ctx->flow.in_port = old_in_port;
+
+ if (rule) {
+ if (rule->super) {
+ rule = rule->super;
+ }
+
+ ctx->recurse++;
+ do_xlate_actions(rule->wr.actions, rule->wr.n_actions, ctx);
+ ctx->recurse--;
+ }
+ }
+ }
+
+ static void
+ xlate_output_action(struct wx_xlate_ctx *ctx,
+ const struct ofp_action_output *oao)
+ {
+ uint16_t xflow_port;
+ uint16_t prev_nf_output_iface = ctx->nf_output_iface;
+
+ ctx->nf_output_iface = NF_OUT_DROP;
+
+ switch (ntohs(oao->port)) {
+ case OFPP_IN_PORT:
+ add_output_action(ctx, ctx->flow.in_port);
+ break;
+ case OFPP_TABLE:
+ xlate_table_action(ctx, ctx->flow.in_port);
+ break;
+ case OFPP_NORMAL:
+ #if 0
+ if (!ctx->wx->ofhooks->normal_cb(ctx->flow, ctx->packet,
+ ctx->out, ctx->tags,
+ &ctx->nf_output_iface,
+ ctx->wx->aux)) {
+ COVERAGE_INC(wx_uninstallable);
+ ctx->may_set_up_flow = false;
+ }
+ break;
+ #else
+ /* fall through to flood for now */
+ #endif
+ case OFPP_FLOOD:
+ add_output_group_action(ctx->out, WX_GROUP_FLOOD,
+ &ctx->nf_output_iface);
+ break;
+ case OFPP_ALL:
+ add_output_group_action(ctx->out, WX_GROUP_ALL, &ctx->nf_output_iface);
+ break;
+ case OFPP_CONTROLLER:
+ add_controller_action(ctx->out, oao);
+ break;
+ case OFPP_LOCAL:
+ add_output_action(ctx, XFLOWP_LOCAL);
+ break;
+ default:
+ xflow_port = ofp_port_to_xflow_port(ntohs(oao->port));
+ if (xflow_port != ctx->flow.in_port) {
+ add_output_action(ctx, xflow_port);
+ }
+ break;
+ }
+
+ if (prev_nf_output_iface == NF_OUT_FLOOD) {
+ ctx->nf_output_iface = NF_OUT_FLOOD;
+ } else if (ctx->nf_output_iface == NF_OUT_DROP) {
+ ctx->nf_output_iface = prev_nf_output_iface;
+ } else if (prev_nf_output_iface != NF_OUT_DROP &&
+ ctx->nf_output_iface != NF_OUT_FLOOD) {
+ ctx->nf_output_iface = NF_OUT_MULTI;
+ }
+ }
+
+ static void
+ xlate_nicira_action(struct wx_xlate_ctx *ctx,
+ const struct nx_action_header *nah)
+ {
+ const struct nx_action_resubmit *nar;
+ const struct nx_action_set_tunnel *nast;
+ union xflow_action *oa;
+ int subtype = ntohs(nah->subtype);
+
+ assert(nah->vendor == htonl(NX_VENDOR_ID));
+ switch (subtype) {
+ case NXAST_RESUBMIT:
+ nar = (const struct nx_action_resubmit *) nah;
+ xlate_table_action(ctx, ofp_port_to_xflow_port(ntohs(nar->in_port)));
+ break;
+
+ case NXAST_SET_TUNNEL:
+ nast = (const struct nx_action_set_tunnel *) nah;
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_TUNNEL);
+ ctx->flow.tun_id = oa->tunnel.tun_id = nast->tun_id;
+ break;
+
+ /* If you add a new action here that modifies flow data, don't forget to
+ * update the flow key in ctx->flow in the same key. */
+
+ default:
+ VLOG_DBG_RL(&rl, "unknown Nicira action type %"PRIu16, subtype);
+ break;
+ }
+ }
+
+ static void
+ do_xlate_actions(const union ofp_action *in, size_t n_in,
+ struct wx_xlate_ctx *ctx)
+ {
+ struct actions_iterator iter;
+ const union ofp_action *ia;
+ const struct wdp_port *port;
+
+ port = port_array_get(&ctx->wx->ports, ctx->flow.in_port);
+ if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
+ port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, stp_eth_addr)
+ ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
+ /* Drop this flow. */
+ return;
+ }
+
+ for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
+ uint16_t type = ntohs(ia->type);
+ union xflow_action *oa;
+
+ switch (type) {
+ case OFPAT_OUTPUT:
+ xlate_output_action(ctx, &ia->output);
+ break;
+
+ case OFPAT_SET_VLAN_VID:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_DL_TCI);
+ oa->dl_tci.tci = ia->vlan_vid.vlan_vid & htons(VLAN_VID_MASK);
+ oa->dl_tci.mask = htons(VLAN_VID_MASK);
+ ctx->flow.dl_vlan = ia->vlan_vid.vlan_vid;
+ break;
+
+ case OFPAT_SET_VLAN_PCP:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_DL_TCI);
+ oa->dl_tci.tci = htons((ia->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT)
+ & VLAN_PCP_MASK);
+ oa->dl_tci.mask = htons(VLAN_PCP_MASK);
+
+ if (ctx->flow.dl_vlan == htons(OFP_VLAN_NONE)) {
+ ctx->flow.dl_vlan = htons(0);
+ }
+ ctx->flow.dl_vlan_pcp = ia->vlan_pcp.vlan_pcp;
+ break;
+
+ case OFPAT_STRIP_VLAN:
+ xflow_actions_add(ctx->out, XFLOWAT_STRIP_VLAN);
+ ctx->flow.dl_vlan = htons(OFP_VLAN_NONE);
+ ctx->flow.dl_vlan_pcp = 0;
+ break;
+
+ case OFPAT_SET_DL_SRC:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_DL_SRC);
+ memcpy(oa->dl_addr.dl_addr,
+ ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
+ memcpy(ctx->flow.dl_src,
+ ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
+ break;
+
+ case OFPAT_SET_DL_DST:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_DL_DST);
+ memcpy(oa->dl_addr.dl_addr,
+ ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
+ memcpy(ctx->flow.dl_dst,
+ ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
+ break;
+
+ case OFPAT_SET_NW_SRC:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_NW_SRC);
+ ctx->flow.nw_src = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
+ break;
+
+ case OFPAT_SET_NW_DST:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_NW_DST);
+ ctx->flow.nw_dst = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
+ break;
+
+ case OFPAT_SET_NW_TOS:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_NW_TOS);
+ ctx->flow.nw_tos = oa->nw_tos.nw_tos = ia->nw_tos.nw_tos;
+ break;
+
+ case OFPAT_SET_TP_SRC:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_TP_SRC);
+ ctx->flow.tp_src = oa->tp_port.tp_port = ia->tp_port.tp_port;
+ break;
+
+ case OFPAT_SET_TP_DST:
+ oa = xflow_actions_add(ctx->out, XFLOWAT_SET_TP_DST);
+ ctx->flow.tp_dst = oa->tp_port.tp_port = ia->tp_port.tp_port;
+ break;
+
+ case OFPAT_VENDOR:
+ xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
+ break;
+
+ default:
+ VLOG_DBG_RL(&rl, "unknown action type %"PRIu16, type);
+ break;
+ }
+ }
+ }
+
+ /* Returns true if 'flow' and 'actions' may be set up as a flow in the kernel.
+ * This is true most of the time, but we don't allow flows that would prevent
+ * DHCP replies from being seen by the local port to be set up in the
+ * kernel.
+ *
+ * We only need this, strictly speaking, when in-band control is turned on. */
+ static bool
+ wx_may_set_up(const flow_t *flow, const struct xflow_actions *actions)
+ {
+ if (flow->dl_type == htons(ETH_TYPE_IP)
+ && flow->nw_proto == IP_TYPE_UDP
+ && flow->tp_src == htons(DHCP_SERVER_PORT)
+ && flow->tp_dst == htons(DHCP_CLIENT_PORT)) {
+ int i;
+
+ for (i = 0; i < actions->n_actions; i++) {
+ const struct xflow_action_output *oao = &actions->actions[i].output;
+ if (oao->type == XFLOWAT_OUTPUT && oao->port == XFLOWP_LOCAL) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ return true;
+ }
+
+ static int
+ wx_xlate_actions(struct wx *wx, const union ofp_action *in, size_t n_in,
+ const flow_t *flow, const struct ofpbuf *packet,
+ struct xflow_actions *out, bool *may_set_up_flow)
+ {
+ //tag_type no_tags = 0;
+ struct wx_xlate_ctx ctx;
+ COVERAGE_INC(wx_ofp2xflow);
+ xflow_actions_init(out);
+ ctx.flow = *flow;
+ ctx.recurse = 0;
+ ctx.wx = wx;
+ ctx.packet = packet;
+ ctx.out = out;
+ //ctx.tags = tags ? tags : &no_tags;
+ ctx.may_set_up_flow = true;
+ ctx.nf_output_iface = NF_OUT_DROP;
+ do_xlate_actions(in, n_in, &ctx);
+
+ if (may_set_up_flow) {
+ *may_set_up_flow = ctx.may_set_up_flow && wx_may_set_up(flow, out);
+ }
+ #if 0
+ if (nf_output_iface) {
+ *nf_output_iface = ctx.nf_output_iface;
+ }
+ #endif
+ if (xflow_actions_overflow(out)) {
+ xflow_actions_init(out);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_TOO_MANY);
+ }
+ return 0;
+ }
+ \f
+ static void
+ update_used(struct wx *wx)
+ {
+ struct xflow_flow *flows;
+ size_t n_flows;
+ size_t i;
+ int error;
+
+ error = xfif_flow_list_all(wx->xfif, &flows, &n_flows);
+ if (error) {
+ return;
+ }
+
+ for (i = 0; i < n_flows; i++) {
+ struct xflow_flow *f = &flows[i];
+ struct wx_rule *rule;
+ flow_t flow;
+
+ xflow_key_to_flow(&f->key, &flow);
+ rule = wx_rule_cast(classifier_find_rule_exactly(&wx->cls, &flow));
+ if (!rule || !rule->installed) {
+ COVERAGE_INC(wx_unexpected_rule);
+ xfif_flow_del(wx->xfif, f);
+ continue;
+ }
+
+ wx_rule_update_time(wx, rule, &f->stats);
+ wx_rule_account(wx, rule, f->stats.n_bytes);
+ }
+ free(flows);
+ }
+
+ static void
+ uninstall_idle_flow(struct wx *wx, struct wx_rule *rule)
+ {
+ assert(rule->installed);
+ assert(!rule->wr.cr.flow.wildcards);
+
+ if (rule->super) {
+ wx_rule_remove(wx, rule);
+ } else {
+ wx_rule_uninstall(wx, rule);
+ }
+ }
+
+ static void
+ expire_rule(struct cls_rule *cls_rule, void *wx_)
+ {
+ struct wx *wx = wx_;
+ struct wx_rule *rule = wx_rule_cast(cls_rule);
+ long long int hard_expire, idle_expire, expire, now;
+
+ hard_expire = (rule->wr.hard_timeout
+ ? rule->wr.created + rule->wr.hard_timeout * 1000
+ : LLONG_MAX);
+ idle_expire = (rule->wr.idle_timeout
+ && (rule->super || list_is_empty(&rule->list))
+ ? rule->used + rule->wr.idle_timeout * 1000
+ : LLONG_MAX);
+ expire = MIN(hard_expire, idle_expire);
+
+ now = time_msec();
+ if (now < expire) {
+ if (rule->installed && now >= rule->used + 5000) {
+ uninstall_idle_flow(wx, rule);
+ } else if (!rule->wr.cr.flow.wildcards) {
+ //XXX active_timeout(wx, rule);
+ }
+
+ return;
+ }
+
+ COVERAGE_INC(wx_expired);
+
+ /* Update stats. This code will be a no-op if the rule expired
+ * due to an idle timeout. */
+ if (rule->wr.cr.flow.wildcards) {
+ struct wx_rule *subrule, *next;
+ LIST_FOR_EACH_SAFE (subrule, next, struct wx_rule, list, &rule->list) {
+ wx_rule_remove(wx, subrule);
+ }
+ } else {
+ wx_rule_uninstall(wx, rule);
+ }
+
+ #if 0 /* XXX */
+ if (!wx_rule_is_hidden(rule)) {
+ send_flow_removed(wx, rule, now,
+ (now >= hard_expire
+ ? OFPRR_HARD_TIMEOUT : OFPRR_IDLE_TIMEOUT));
+ }
+ #endif
+ wx_rule_remove(wx, rule);
+ }
+
+ struct revalidate_cbdata {
+ struct wx *wx;
+ bool revalidate_all; /* Revalidate all exact-match rules? */
+ bool revalidate_subrules; /* Revalidate all exact-match subrules? */
+ //struct tag_set revalidate_set; /* Set of tags to revalidate. */
+ };
+
+ static bool
+ revalidate_rule(struct wx *wx, struct wx_rule *rule)
+ {
+ const flow_t *flow = &rule->wr.cr.flow;
+
+ COVERAGE_INC(wx_revalidate_rule);
+ if (rule->super) {
+ struct wx_rule *super;
+ super = wx_rule_cast(classifier_lookup_wild(&wx->cls, flow));
+ if (!super) {
+ wx_rule_remove(wx, rule);
+ return false;
+ } else if (super != rule->super) {
+ COVERAGE_INC(wx_revalidate_moved);
+ list_remove(&rule->list);
+ list_push_back(&super->list, &rule->list);
+ rule->super = super;
+ rule->wr.hard_timeout = super->wr.hard_timeout;
+ rule->wr.idle_timeout = super->wr.idle_timeout;
+ rule->wr.created = super->wr.created;
+ rule->used = 0;
+ }
+ }
+
+ wx_rule_update_actions(wx, rule);
+ return true;
+ }
+
+ static void
+ revalidate_cb(struct cls_rule *sub_, void *cbdata_)
+ {
+ struct wx_rule *sub = wx_rule_cast(sub_);
+ struct revalidate_cbdata *cbdata = cbdata_;
+
+ if (cbdata->revalidate_all
+ || (cbdata->revalidate_subrules && sub->super)
+ /*|| (tag_set_intersects(&cbdata->revalidate_set, sub->tags))*/) {
+ revalidate_rule(cbdata->wx, sub);
+ }
+ }
+
+ static void
+ wx_run_one(struct wx *wx)
+ {
+ wx_port_run(wx);
+
+ if (time_msec() >= wx->next_expiration) {
+ COVERAGE_INC(wx_expiration);
+ wx->next_expiration = time_msec() + 1000;
+ update_used(wx);
+
+ classifier_for_each(&wx->cls, CLS_INC_ALL, expire_rule, wx);
+
+ /* XXX account_checkpoint_cb */
+ }
+
+ if (wx->need_revalidate /*|| !tag_set_is_empty(&p->revalidate_set)*/) {
+ struct revalidate_cbdata cbdata;
+ cbdata.wx = wx;
+ cbdata.revalidate_all = false;
+ cbdata.revalidate_subrules = wx->need_revalidate;
+ //cbdata.revalidate_set = wx->revalidate_set;
+ //tag_set_init(&wx->revalidate_set);
+ COVERAGE_INC(wx_revalidate);
+ classifier_for_each(&wx->cls, CLS_INC_EXACT, revalidate_cb, &cbdata);
+ wx->need_revalidate = false;
+ }
+ }
+
+ static void
+ wx_run(void)
+ {
+ struct wx *wx;
+
+ LIST_FOR_EACH (wx, struct wx, list_node, &all_wx) {
+ wx_run_one(wx);
+ }
+ xf_run();
+ }
+
+ static void
+ wx_wait_one(struct wx *wx)
+ {
+ xfif_port_poll_wait(wx->xfif);
+ netdev_monitor_poll_wait(wx->netdev_monitor);
+ if (wx->need_revalidate /*|| !tag_set_is_empty(&p->revalidate_set)*/) {
+ poll_immediate_wake();
+ } else if (wx->next_expiration != LLONG_MAX) {
+ poll_timer_wait_until(wx->next_expiration);
+ }
+ }
+
+ static void
+ wx_wait(void)
+ {
+ struct wx *wx;
+
+ LIST_FOR_EACH (wx, struct wx, list_node, &all_wx) {
+ wx_wait_one(wx);
+ }
+ xf_wait();
+ }
+ \f
+ static int wx_flow_flush(struct wdp *);
+
+ static int
+ wx_enumerate(const struct wdp_class *wdp_class, struct svec *all_wdps)
+ {
+ struct svec names = SVEC_EMPTY_INITIALIZER;
+ int error = xf_enumerate_names(wdp_class->type, &names);
+ svec_move(all_wdps, &names);
+ return error;
+ }
+
+ static int
+ wx_open(const struct wdp_class *wdp_class, const char *name, bool create,
+ struct wdp **wdpp)
+ {
+ struct xfif *xfif;
+ int error;
+
+ error = (create
+ ? xfif_create_and_open(name, wdp_class->type, &xfif)
+ : xfif_open(name, wdp_class->type, &xfif));
+ if (!error) {
+ struct wx *wx;
+
+ wx = xzalloc(sizeof *wx);
+ list_push_back(&all_wx, &wx->list_node);
+ wdp_init(&wx->wdp, wdp_class, name, 0, 0);
+ wx->xfif = xfif;
+ classifier_init(&wx->cls);
+ wx->netdev_monitor = netdev_monitor_create();
+ port_array_init(&wx->ports);
+ shash_init(&wx->port_by_name);
+ wx->next_expiration = time_msec() + 1000;
+
+ wx_port_init(wx);
+
+ *wdpp = &wx->wdp;
+ }
+
+ return error;
+ }
+
+ static void
+ wx_close(struct wdp *wdp)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ wx_flow_flush(wdp);
+ xfif_close(wx->xfif);
+ classifier_destroy(&wx->cls);
+ netdev_monitor_destroy(wx->netdev_monitor);
+ list_remove(&wx->list_node);
+ free(wx);
+ }
+
+ static int
+ wx_get_all_names(const struct wdp *wdp, struct svec *all_names)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_get_all_names(wx->xfif, all_names);
+ }
+
+ static int
+ wx_destroy(struct wdp *wdp)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_delete(wx->xfif);
+ }
+
+ static void
+ hton_ofp_phy_port(struct ofp_phy_port *opp)
+ {
+ opp->port_no = htons(opp->port_no);
+ opp->config = htonl(opp->config);
+ opp->state = htonl(opp->state);
+ opp->curr = htonl(opp->curr);
+ opp->advertised = htonl(opp->advertised);
+ opp->supported = htonl(opp->supported);
+ opp->peer = htonl(opp->peer);
+ }
+
+ static int
+ wx_get_features(const struct wdp *wdp, struct ofpbuf **featuresp)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct ofp_switch_features *osf;
+ struct ofpbuf *buf;
+ unsigned int port_no;
+ struct wdp_port *port;
+
+ buf = ofpbuf_new(sizeof *osf);
+ osf = ofpbuf_put_zeros(buf, sizeof *osf);
+ osf->n_tables = 2;
+ osf->capabilities = htonl(OFPC_ARP_MATCH_IP);
+ osf->actions = htonl((1u << OFPAT_OUTPUT) |
+ (1u << OFPAT_SET_VLAN_VID) |
+ (1u << OFPAT_SET_VLAN_PCP) |
+ (1u << OFPAT_STRIP_VLAN) |
+ (1u << OFPAT_SET_DL_SRC) |
+ (1u << OFPAT_SET_DL_DST) |
+ (1u << OFPAT_SET_NW_SRC) |
+ (1u << OFPAT_SET_NW_DST) |
+ (1u << OFPAT_SET_NW_TOS) |
+ (1u << OFPAT_SET_TP_SRC) |
+ (1u << OFPAT_SET_TP_DST));
+
+ PORT_ARRAY_FOR_EACH (port, &wx->ports, port_no) {
+ hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
+ }
+
+ *featuresp = buf;
+ return 0;
+ }
+
+ static void
+ count_subrules(struct cls_rule *cls_rule, void *n_subrules_)
+ {
+ struct wx_rule *rule = wx_rule_cast(cls_rule);
+ int *n_subrules = n_subrules_;
+
+ if (rule->super) {
+ (*n_subrules)++;
+ }
+ }
+
+ static int
+ wx_get_stats(const struct wdp *wdp, struct wdp_stats *stats)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct xflow_stats xflow_stats;
+ int n_subrules;
+ int error;
+
+ error = xfif_get_xf_stats(wx->xfif, &xflow_stats);
+
+ n_subrules = 0;
+ classifier_for_each(&wx->cls, CLS_INC_EXACT, count_subrules, &n_subrules);
+
+ stats->exact.n_flows = classifier_count_exact(&wx->cls) - n_subrules;
+ stats->exact.cur_capacity = xflow_stats.cur_capacity;
+ stats->exact.max_capacity = MIN(WX_MAX_EXACT, xflow_stats.max_capacity);
+ stats->exact.n_hit = xflow_stats.n_hit;
+ stats->exact.n_missed = xflow_stats.n_missed;
+ stats->exact.n_lost = xflow_stats.n_lost;
+
+ stats->wild.n_flows = classifier_count_wild(&wx->cls);
+ stats->wild.cur_capacity = WX_MAX_WILD;
+ stats->wild.max_capacity = WX_MAX_WILD;
+ stats->wild.n_hit = 0; /* XXX */
+ stats->wild.n_missed = 0; /* XXX */
+ stats->wild.n_lost = 0; /* XXX */
+
+ stats->n_ports = xflow_stats.n_ports;
+ stats->max_ports = xflow_stats.max_ports;
+
+ stats->n_frags = xflow_stats.n_frags;
+
+ stats->max_miss_queue = xflow_stats.max_miss_queue;
+ stats->max_action_queue = xflow_stats.max_action_queue;
+ stats->max_sflow_queue = xflow_stats.max_sflow_queue;
+
+ return error;
+ }
+
+ static int
+ wx_get_drop_frags(const struct wdp *wdp, bool *drop_frags)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_get_drop_frags(wx->xfif, drop_frags);
+ }
+
+ static int
+ wx_set_drop_frags(struct wdp *wdp, bool drop_frags)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_set_drop_frags(wx->xfif, drop_frags);
+ }
+
+ static int
+ wx_port_add(struct wdp *wdp, const char *devname,
+ bool internal, uint16_t *port_no)
+ {
+ struct wx *wx = wx_cast(wdp);
+ uint16_t xflow_flags = internal ? XFLOW_PORT_INTERNAL : 0;
+ return xfif_port_add(wx->xfif, devname, xflow_flags, port_no);
+ }
+
+ static int
+ wx_port_del(struct wdp *wdp, uint16_t port_no)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_port_del(wx->xfif, port_no);
+ }
+
+ static int
+ wx_answer_port_query(const struct wdp_port *port, struct wdp_port *portp)
+ {
+ if (port) {
+ wdp_port_copy(portp, port);
+ return 0;
+ } else {
+ return ENOENT;
+ }
+ }
+
+ static int
+ wx_port_query_by_number(const struct wdp *wdp, uint16_t port_no,
+ struct wdp_port *portp)
+ {
+ struct wx *wx = wx_cast(wdp);
+ const struct wdp_port *port;
+
+ port = port_array_get(&wx->ports, ofp_port_to_xflow_port(port_no));
+ return wx_answer_port_query(port, portp);
+ }
+
+ static int
+ wx_port_query_by_name(const struct wdp *wdp, const char *devname,
+ struct wdp_port *portp)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return wx_answer_port_query(shash_find_data(&wx->port_by_name, devname),
+ portp);
+ }
+
+ static int
+ wx_port_set_config(struct wdp *wdp, uint16_t port_no, uint32_t config)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wdp_port *port;
+ uint32_t changes;
+
+ port = port_array_get(&wx->ports, ofp_port_to_xflow_port(port_no));
+ if (!port) {
+ return ENOENT;
+ }
+ changes = config ^ port->opp.config;
+
+ if (changes & OFPPC_PORT_DOWN) {
+ int error;
+ if (config & OFPPC_PORT_DOWN) {
+ error = netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
+ } else {
+ error = netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
+ }
+ if (!error) {
+ port->opp.config ^= OFPPC_PORT_DOWN;
+ }
+ }
+
+ #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | OFPPC_NO_FWD)
+ if (changes & REVALIDATE_BITS) {
+ COVERAGE_INC(wx_costly_flags);
+ port->opp.config ^= changes & REVALIDATE_BITS;
+ wx->need_revalidate = true;
+ }
+ #undef REVALIDATE_BITS
+
+ if (changes & OFPPC_NO_FLOOD) {
+ port->opp.config ^= OFPPC_NO_FLOOD;
+ wx_port_refresh_groups(wx);
+ }
+
+ if (changes & OFPPC_NO_PACKET_IN) {
+ port->opp.config ^= OFPPC_NO_PACKET_IN;
+ }
+
+ return 0;
+ }
+
+ static int
+ wx_port_list(const struct wdp *wdp, struct wdp_port **portsp, size_t *n_portsp)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wdp_port *ports, *port;
+ unsigned int port_no;
+ size_t n_ports, i;
+
+ *n_portsp = n_ports = port_array_count(&wx->ports);
+ *portsp = ports = xmalloc(n_ports * sizeof *ports);
+ i = 0;
+ PORT_ARRAY_FOR_EACH (port, &wx->ports, port_no) {
+ wdp_port_copy(&ports[i++], port);
+ }
+ assert(i == n_ports);
+
+ return 0;
+ }
+
+ static int
+ wx_port_poll(const struct wdp *wdp, char **devnamep)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_port_poll(wx->xfif, devnamep);
+ }
+
+ static void
+ wx_port_poll_wait(const struct wdp *wdp)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ xfif_port_poll_wait(wx->xfif);
+ }
+
+ static struct wdp_rule *
+ wx_flow_get(const struct wdp *wdp, const flow_t *flow)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wx_rule *rule;
+
+ rule = wx_rule_cast(classifier_find_rule_exactly(&wx->cls, flow));
+ return rule && !wx_rule_is_hidden(rule) ? &rule->wr : NULL;
+ }
+
+ static struct wdp_rule *
+ wx_flow_match(const struct wdp *wdp, const flow_t *flow)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wx_rule *rule;
+
+ rule = wx_rule_cast(classifier_lookup(&wx->cls, flow));
+ if (rule) {
+ if (wx_rule_is_hidden(rule)) {
+ rule = rule->super;
+ }
+ return &rule->wr;
+ } else {
+ return NULL;
+ }
+ }
+
+ struct wx_for_each_thunk_aux {
+ wdp_flow_cb_func *client_callback;
+ void *client_aux;
+ };
+
+ static void
+ wx_for_each_thunk(struct cls_rule *cls_rule, void *aux_)
+ {
+ struct wx_for_each_thunk_aux *aux = aux_;
+ struct wx_rule *rule = wx_rule_cast(cls_rule);
+
+ if (!wx_rule_is_hidden(rule)) {
+ aux->client_callback(&rule->wr, aux->client_aux);
+ }
+ }
+
+ static void
+ wx_flow_for_each_match(const struct wdp *wdp, const flow_t *target,
+ int include,
+ wdp_flow_cb_func *client_callback, void *client_aux)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wx_for_each_thunk_aux aux;
+
+ aux.client_callback = client_callback;
+ aux.client_aux = client_aux;
+ classifier_for_each_match(&wx->cls, target, include,
+ wx_for_each_thunk, &aux);
+ }
+
+ /* Obtains statistic counters for 'rule' within 'wx' and stores them into
+ * '*stats'. If 'rule' is a wildcarded rule, the returned statistic include
+ * statistics for all of 'rule''s subrules. */
+ static void
+ query_stats(struct wx *wx, struct wx_rule *rule, struct wdp_flow_stats *stats)
+ {
+ struct wx_rule *subrule;
+ struct xflow_flow *xflow_flows;
+ size_t n_xflow_flows;
+
+ /* Start from historical data for 'rule' itself that are no longer tracked
+ * by the datapath. This counts, for example, subrules that have
+ * expired. */
+ stats->n_packets = rule->packet_count;
+ stats->n_bytes = rule->byte_count;
+ stats->inserted = rule->wr.created;
+ stats->used = LLONG_MIN;
+ stats->tcp_flags = 0;
+ stats->ip_tos = 0;
+
+ /* Prepare to ask the datapath for statistics on 'rule', or if it is
+ * wildcarded then on all of its subrules.
+ *
+ * Also, add any statistics that are not tracked by the datapath for each
+ * subrule. This includes, for example, statistics for packets that were
+ * executed "by hand" by ofproto via xfif_execute() but must be accounted
+ * to a flow. */
+ n_xflow_flows = rule->wr.cr.flow.wildcards ? list_size(&rule->list) : 1;
+ xflow_flows = xzalloc(n_xflow_flows * sizeof *xflow_flows);
+ if (rule->wr.cr.flow.wildcards) {
+ size_t i = 0;
+ LIST_FOR_EACH (subrule, struct wx_rule, list, &rule->list) {
+ xflow_key_from_flow(&xflow_flows[i++].key, &subrule->wr.cr.flow);
+ stats->n_packets += subrule->packet_count;
+ stats->n_bytes += subrule->byte_count;
+ }
+ } else {
+ xflow_key_from_flow(&xflow_flows[0].key, &rule->wr.cr.flow);
+ }
+
+ /* Fetch up-to-date statistics from the datapath and add them in. */
+ if (!xfif_flow_get_multiple(wx->xfif, xflow_flows, n_xflow_flows)) {
+ size_t i;
+ for (i = 0; i < n_xflow_flows; i++) {
+ struct xflow_flow *xflow_flow = &xflow_flows[i];
+ long long int used;
+
+ stats->n_packets += xflow_flow->stats.n_packets;
+ stats->n_bytes += xflow_flow->stats.n_bytes;
+ used = xflow_flow_stats_to_msec(&xflow_flow->stats);
+ if (used > stats->used) {
+ stats->used = used;
+ if (xflow_flow->key.dl_type == htons(ETH_TYPE_IP)
+ && xflow_flow->key.nw_proto == IP_TYPE_TCP) {
+ stats->ip_tos = xflow_flow->stats.ip_tos;
+ }
+ }
+ stats->tcp_flags |= xflow_flow->stats.tcp_flags;
+ }
+ }
+ free(xflow_flows);
+ }
+
+ static int
+ wx_flow_get_stats(const struct wdp *wdp,
+ const struct wdp_rule *wdp_rule,
+ struct wdp_flow_stats *stats)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wx_rule *rule = wx_rule_cast(&wdp_rule->cr);
+
+ query_stats(wx, rule, stats);
+ return 0;
+ }
+
+ static bool
+ wx_flow_overlaps(const struct wdp *wdp, const flow_t *flow)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ /* XXX overlap with a subrule? */
+ return classifier_rule_overlaps(&wx->cls, flow);
+ }
+
+ static int
+ wx_flow_put(struct wdp *wdp, const struct wdp_flow_put *put,
+ struct wdp_flow_stats *old_stats, struct wdp_rule **rulep)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wx_rule *rule;
+
+ rule = wx_rule_cast(classifier_find_rule_exactly(&wx->cls, put->flow));
+ if (rule && wx_rule_is_hidden(rule)) {
+ rule = NULL;
+ }
+
+ if (rule) {
+ if (!(put->flags & WDP_PUT_MODIFY)) {
+ return EEXIST;
+ }
+ } else {
+ if (!(put->flags & WDP_PUT_CREATE)) {
+ return EINVAL;
+ }
+ if ((put->flow->wildcards
+ ? classifier_count_wild(&wx->cls) >= WX_MAX_WILD
+ : classifier_count_exact(&wx->cls) >= WX_MAX_EXACT)) {
+ /* XXX subrules should not count against exact-match limit */
+ return ENOBUFS;
+ }
+ }
+
+ rule = wx_rule_create(NULL, put->actions, put->n_actions,
+ put->idle_timeout, put->hard_timeout);
+ cls_rule_from_flow(put->flow, &rule->wr.cr);
+ wx_rule_insert(wx, rule, NULL, 0);
+
+ if (old_stats) {
+ /* XXX */
+ memset(old_stats, 0, sizeof *old_stats);
+ }
+ if (rulep) {
+ *rulep = &rule->wr;
+ }
+
+ return 0;
+ }
+
+ static int
+ wx_flow_delete(struct wdp *wdp, struct wdp_rule *wdp_rule,
+ struct wdp_flow_stats *final_stats)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct wx_rule *rule = wx_rule_cast(&wdp_rule->cr);
+
+ wx_rule_remove(wx, rule);
+ if (final_stats) {
+ memset(final_stats, 0, sizeof *final_stats); /* XXX */
+ }
+ return 0;
+ }
+
+ static void
+ wx_flush_rule(struct cls_rule *cls_rule, void *wx_)
+ {
+ struct wx_rule *rule = wx_rule_cast(cls_rule);
+ struct wx *wx = wx_;
+
+ /* Mark the flow as not installed, even though it might really be
+ * installed, so that wx_rule_remove() doesn't bother trying to uninstall
+ * it. There is no point in uninstalling it individually since we are
+ * about to blow away all the flows with xfif_flow_flush(). */
+ rule->installed = false;
+
+ wx_rule_remove(wx, rule);
+ }
+
+ static int
+ wx_flow_flush(struct wdp *wdp)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ COVERAGE_INC(wx_flow_flush);
+ classifier_for_each(&wx->cls, CLS_INC_ALL, wx_flush_rule, wx);
+ xfif_flow_flush(wx->xfif);
+ return 0;
+ }
+
+ static int
+ wx_execute(struct wdp *wdp, uint16_t in_port,
+ const union ofp_action actions[], int n_actions,
+ const struct ofpbuf *packet)
+ {
+ struct wx *wx = wx_cast(wdp);
+ struct xflow_actions xflow_actions;
+ flow_t flow;
+ int error;
+
+ flow_extract((struct ofpbuf *) packet, 0, in_port, &flow);
+ error = wx_xlate_actions(wx, actions, n_actions, &flow, packet,
+ &xflow_actions, NULL);
+ if (error) {
+ return error;
+ }
+ xfif_execute(wx->xfif, ofp_port_to_xflow_port(in_port),
+ xflow_actions.actions, xflow_actions.n_actions, packet);
+ return 0;
+ }
+
+ static int
+ wx_flow_inject(struct wdp *wdp, struct wdp_rule *wdp_rule,
+ uint16_t in_port, const struct ofpbuf *packet)
+ {
+ struct wx_rule *rule = wx_rule_cast(&wdp_rule->cr);
+ int error;
+
+ error = wx_execute(wdp, in_port, rule->wr.actions, rule->wr.n_actions,
+ packet);
+ if (!error) {
+ rule->packet_count++;
+ rule->byte_count += packet->size;
+ rule->used = time_msec();
+ }
+ return error;
+ }
+
+ static int
+ wx_recv_get_mask(const struct wdp *wdp, int *listen_mask)
+ {
+ struct wx *wx = wx_cast(wdp);
+ int xflow_listen_mask;
+ int error;
+
+ error = xfif_recv_get_mask(wx->xfif, &xflow_listen_mask);
+ if (!error) {
+ *listen_mask = 0;
+ if (xflow_listen_mask & XFLOWL_MISS) {
+ *listen_mask |= 1 << WDP_CHAN_MISS;
+ }
+ if (xflow_listen_mask & XFLOWL_ACTION) {
+ *listen_mask |= 1 << WDP_CHAN_ACTION;
+ }
+ if (xflow_listen_mask & XFLOWL_SFLOW) {
+ *listen_mask |= 1 << WDP_CHAN_SFLOW;
+ }
+ }
+ return error;
+ }
+
+ static int
+ wx_recv_set_mask(struct wdp *wdp, int listen_mask)
+ {
+ struct wx *wx = wx_cast(wdp);
+ int xflow_listen_mask;
+
+ xflow_listen_mask = 0;
+ if (listen_mask & (1 << WDP_CHAN_MISS)) {
+ xflow_listen_mask |= XFLOWL_MISS;
+ }
+ if (listen_mask & (1 << WDP_CHAN_ACTION)) {
+ xflow_listen_mask |= XFLOWL_ACTION;
+ }
+ if (listen_mask & (1 << WDP_CHAN_SFLOW)) {
+ xflow_listen_mask |= XFLOWL_SFLOW;
+ }
+
+ return xfif_recv_set_mask(wx->xfif, xflow_listen_mask);
+ }
+
+ static int
+ wx_get_sflow_probability(const struct wdp *wdp, uint32_t *probability)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_get_sflow_probability(wx->xfif, probability);
+ }
+
+ static int
+ wx_set_sflow_probability(struct wdp *wdp, uint32_t probability)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ return xfif_set_sflow_probability(wx->xfif, probability);
+ }
+
+ static int
+ wx_translate_xflow_msg(struct xflow_msg *msg, struct ofpbuf *payload,
+ struct wdp_packet *packet)
+ {
+ packet->in_port = xflow_port_to_ofp_port(msg->port);
+ packet->send_len = 0;
+ packet->tun_id = 0;
+
+ switch (msg->type) {
+ case _XFLOWL_MISS_NR:
+ packet->channel = WDP_CHAN_MISS;
+ packet->payload = payload;
+ packet->tun_id = msg->arg;
+ return 0;
+
+ case _XFLOWL_ACTION_NR:
+ packet->channel = WDP_CHAN_ACTION;
+ packet->payload = payload;
+ packet->send_len = msg->arg;
+ return 0;
+
+ case _XFLOWL_SFLOW_NR:
+ /* XXX */
+ ofpbuf_delete(payload);
+ return ENOSYS;
+
+ default:
+ VLOG_WARN_RL(&rl, "received XFLOW message of unexpected type %"PRIu32,
+ msg->type);
+ ofpbuf_delete(payload);
+ return ENOSYS;
+ }
+ }
+
+ static const uint8_t *
+ get_local_mac(const struct wx *wx)
+ {
+ const struct wdp_port *port = port_array_get(&wx->ports, XFLOWP_LOCAL);
+ return port ? port->opp.hw_addr : NULL;
+ }
+
+ /* Returns true if 'packet' is a DHCP reply to the local port. Such a reply
+ * should be sent to the local port regardless of the flow table.
+ *
+ * We only need this, strictly speaking, when in-band control is turned on. */
+ static bool
+ wx_is_local_dhcp_reply(const struct wx *wx,
+ const flow_t *flow, const struct ofpbuf *packet)
+ {
+ if (flow->dl_type == htons(ETH_TYPE_IP)
+ && flow->nw_proto == IP_TYPE_UDP
+ && flow->tp_src == htons(DHCP_SERVER_PORT)
+ && flow->tp_dst == htons(DHCP_CLIENT_PORT)
+ && packet->l7)
+ {
+ const uint8_t *local_mac = get_local_mac(wx);
+ struct dhcp_header *dhcp = ofpbuf_at(
+ packet, (char *)packet->l7 - (char *)packet->data, sizeof *dhcp);
+ return dhcp && local_mac && eth_addr_equals(dhcp->chaddr, local_mac);
+ }
+
+ return false;
+ }
+
+ static bool
+ wx_explode_rule(struct wx *wx, struct xflow_msg *msg, struct ofpbuf *payload)
+ {
+ struct wx_rule *rule;
+ flow_t flow;
+
+ flow_extract(payload, 0, xflow_port_to_ofp_port(msg->port), &flow);
+
+ if (wx_is_local_dhcp_reply(wx, &flow, payload)) {
+ union xflow_action action;
+
+ memset(&action, 0, sizeof(action));
+ action.output.type = XFLOWAT_OUTPUT;
+ action.output.port = XFLOWP_LOCAL;
+ xfif_execute(wx->xfif, msg->port, &action, 1, payload);
+ }
+
+ rule = wx_rule_lookup_valid(wx, &flow);
+ if (!rule) {
+ return false;
+ }
+
+ if (rule->wr.cr.flow.wildcards) {
+ rule = wx_rule_create_subrule(wx, rule, &flow);
+ wx_rule_make_actions(wx, rule, payload);
+ } else {
+ if (!rule->may_install) {
+ /* The rule is not installable, that is, we need to process every
+ * packet, so process the current packet and set its actions into
+ * 'subrule'. */
+ wx_rule_make_actions(wx, rule, payload);
+ } else {
+ /* XXX revalidate rule if it needs it */
+ }
+ }
+
+ wx_rule_execute(wx, rule, payload, &flow);
+ wx_rule_reinstall(wx, rule);
+
+ return true;
+ }
+
+ static int
+ wx_recv(struct wdp *wdp, struct wdp_packet *packet)
+ {
+ struct wx *wx = wx_cast(wdp);
+ int i;
+
+ /* XXX need to avoid 50*50 potential cost for caller. */
+ for (i = 0; i < 50; i++) {
+ struct xflow_msg *msg;
+ struct ofpbuf *buf;
+ int error;
+
+ error = xfif_recv(wx->xfif, &buf);
+ if (error) {
+ return error;
+ }
+
+ msg = ofpbuf_pull(buf, sizeof *msg);
+ if (msg->type != _XFLOWL_MISS_NR || !wx_explode_rule(wx, msg, buf)) {
+ return wx_translate_xflow_msg(msg, buf, packet);
+ }
+ ofpbuf_delete(buf);
+ }
+ return EAGAIN;
+ }
+
+ static void
+ wx_recv_wait(struct wdp *wdp)
+ {
+ struct wx *wx = wx_cast(wdp);
+
+ xfif_recv_wait(wx->xfif);
+ }
+ \f
+ static void wx_port_update(struct wx *, const char *devname);
+ static void wx_port_reinit(struct wx *);
+
+ static void
+ wx_port_process_change(struct wx *wx, int error, char *devname)
+ {
+ if (error == ENOBUFS) {
+ wx_port_reinit(wx);
+ } else if (!error) {
+ wx_port_update(wx, devname);
+ free(devname);
+ }
+ }
+
+ static void
+ wx_port_run(struct wx *wx)
+ {
+ char *devname;
+ int error;
+
+ while ((error = xfif_port_poll(wx->xfif, &devname)) != EAGAIN) {
+ wx_port_process_change(wx, error, devname);
+ }
+ while ((error = netdev_monitor_poll(wx->netdev_monitor,
+ &devname)) != EAGAIN) {
+ wx_port_process_change(wx, error, devname);
+ }
+ }
+
+ static size_t
+ wx_port_refresh_group(struct wx *wx, unsigned int group)
+ {
+ uint16_t *ports;
+ size_t n_ports;
+ struct wdp_port *port;
+ unsigned int port_no;
+
+ assert(group == WX_GROUP_ALL || group == WX_GROUP_FLOOD);
+
+ ports = xmalloc(port_array_count(&wx->ports) * sizeof *ports);
+ n_ports = 0;
+ PORT_ARRAY_FOR_EACH (port, &wx->ports, port_no) {
+ if (group == WX_GROUP_ALL || !(port->opp.config & OFPPC_NO_FLOOD)) {
+ ports[n_ports++] = port_no;
+ }
+ }
+ xfif_port_group_set(wx->xfif, group, ports, n_ports);
+ free(ports);
+
+ return n_ports;
+ }
+
+ static void
+ wx_port_refresh_groups(struct wx *wx)
+ {
+ wx_port_refresh_group(wx, WX_GROUP_FLOOD);
+ wx_port_refresh_group(wx, WX_GROUP_ALL);
+ }
+
+ static void
+ wx_port_reinit(struct wx *wx)
+ {
+ struct svec devnames;
+ struct wdp_port *wdp_port;
+ unsigned int port_no;
+ struct xflow_port *xflow_ports;
+ size_t n_xflow_ports;
+ size_t i;
+
+ svec_init(&devnames);
+ PORT_ARRAY_FOR_EACH (wdp_port, &wx->ports, port_no) {
+ svec_add (&devnames, (char *) wdp_port->opp.name);
+ }
+ xfif_port_list(wx->xfif, &xflow_ports, &n_xflow_ports);
+ for (i = 0; i < n_xflow_ports; i++) {
+ svec_add(&devnames, xflow_ports[i].devname);
+ }
+ free(xflow_ports);
+
+ svec_sort_unique(&devnames);
+ for (i = 0; i < devnames.n; i++) {
+ wx_port_update(wx, devnames.names[i]);
+ }
+ svec_destroy(&devnames);
+
+ wx_port_refresh_groups(wx);
+ }
+
+ static struct wdp_port *
+ make_wdp_port(const struct xflow_port *xflow_port)
+ {
+ struct netdev_options netdev_options;
+ enum netdev_flags flags;
+ struct wdp_port *wdp_port;
+ struct netdev *netdev;
+ bool carrier;
+ int error;
+
+ memset(&netdev_options, 0, sizeof netdev_options);
+ netdev_options.name = xflow_port->devname;
+ netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
+
+ error = netdev_open(&netdev_options, &netdev);
+ if (error) {
+ VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
+ "cannot be opened (%s)",
+ xflow_port->devname, xflow_port->port,
+ xflow_port->devname, strerror(error));
+ return NULL;
+ }
+
+ wdp_port = xmalloc(sizeof *wdp_port);
+ wdp_port->netdev = netdev;
+ wdp_port->opp.port_no = xflow_port_to_ofp_port(xflow_port->port);
+ netdev_get_etheraddr(netdev, wdp_port->opp.hw_addr);
+ strncpy((char *) wdp_port->opp.name, xflow_port->devname,
+ sizeof wdp_port->opp.name);
+ wdp_port->opp.name[sizeof wdp_port->opp.name - 1] = '\0';
+
+ netdev_get_flags(netdev, &flags);
+ wdp_port->opp.config = flags & NETDEV_UP ? 0 : OFPPC_PORT_DOWN;
+
+ netdev_get_carrier(netdev, &carrier);
+ wdp_port->opp.state = carrier ? 0 : OFPPS_LINK_DOWN;
+
+ netdev_get_features(netdev,
+ &wdp_port->opp.curr, &wdp_port->opp.advertised,
+ &wdp_port->opp.supported, &wdp_port->opp.peer);
+
+ wdp_port->devname = xstrdup(xflow_port->devname);
+ wdp_port->internal = (xflow_port->flags & XFLOW_PORT_INTERNAL) != 0;
+ return wdp_port;
+ }
+
+ static bool
+ wx_port_conflicts(const struct wx *wx, const struct xflow_port *xflow_port)
+ {
+ if (port_array_get(&wx->ports, xflow_port->port)) {
+ VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
+ xflow_port->port);
+ return true;
+ } else if (shash_find(&wx->port_by_name, xflow_port->devname)) {
+ VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
+ xflow_port->devname);
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ static int
+ wdp_port_equal(const struct wdp_port *a_, const struct wdp_port *b_)
+ {
+ const struct ofp_phy_port *a = &a_->opp;
+ const struct ofp_phy_port *b = &b_->opp;
+
+ BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
+ return (a->port_no == b->port_no
+ && !memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
+ && !strcmp((char *) a->name, (char *) b->name)
+ && a->state == b->state
+ && a->config == b->config
+ && a->curr == b->curr
+ && a->advertised == b->advertised
+ && a->supported == b->supported
+ && a->peer == b->peer);
+ }
+
+ static void
+ wx_port_install(struct wx *wx, struct wdp_port *wdp_port)
+ {
+ uint16_t xflow_port = ofp_port_to_xflow_port(wdp_port->opp.port_no);
+ const char *netdev_name = (const char *) wdp_port->opp.name;
+
+ netdev_monitor_add(wx->netdev_monitor, wdp_port->netdev);
+ port_array_set(&wx->ports, xflow_port, wdp_port);
+ shash_add(&wx->port_by_name, netdev_name, wdp_port);
+ }
+
+ static void
+ wx_port_remove(struct wx *wx, struct wdp_port *wdp_port)
+ {
+ uint16_t xflow_port = ofp_port_to_xflow_port(wdp_port->opp.port_no);
+
+ netdev_monitor_remove(wx->netdev_monitor, wdp_port->netdev);
+ port_array_set(&wx->ports, xflow_port, NULL);
+ shash_delete(&wx->port_by_name,
+ shash_find(&wx->port_by_name, (char *) wdp_port->opp.name));
+ }
+
+ static void
+ wx_port_free(struct wdp_port *wdp_port)
+ {
+ if (wdp_port) {
+ netdev_close(wdp_port->netdev);
+ free(wdp_port);
+ }
+ }
+
+ static void
+ wx_port_update(struct wx *wx, const char *devname)
+ {
+ struct xflow_port xflow_port;
+ struct wdp_port *old_wdp_port;
+ struct wdp_port *new_wdp_port;
+ int error;
+
+ COVERAGE_INC(wx_update_port);
+
+ /* Query the datapath for port information. */
+ error = xfif_port_query_by_name(wx->xfif, devname, &xflow_port);
+
+ /* Find the old wdp_port. */
+ old_wdp_port = shash_find_data(&wx->port_by_name, devname);
+ if (!error) {
+ if (!old_wdp_port) {
+ /* There's no port named 'devname' but there might be a port with
+ * the same port number. This could happen if a port is deleted
+ * and then a new one added in its place very quickly, or if a port
+ * is renamed. In the former case we want to send an OFPPR_DELETE
+ * and an OFPPR_ADD, and in the latter case we want to send a
+ * single OFPPR_MODIFY. We can distinguish the cases by comparing
+ * the old port's ifindex against the new port, or perhaps less
+ * reliably but more portably by comparing the old port's MAC
+ * against the new port's MAC. However, this code isn't that smart
+ * and always sends an OFPPR_MODIFY (XXX). */
+ old_wdp_port = port_array_get(&wx->ports, xflow_port.port);
+ }
+ } else if (error != ENOENT && error != ENODEV) {
+ VLOG_WARN_RL(&rl, "xfif_port_query_by_name returned unexpected error "
+ "%s", strerror(error));
+ return;
+ }
+
+ /* Create a new wdp_port. */
+ new_wdp_port = !error ? make_wdp_port(&xflow_port) : NULL;
+
+ /* Eliminate a few pathological cases. */
+ if (!old_wdp_port && !new_wdp_port) {
+ return;
+ } else if (old_wdp_port && new_wdp_port) {
+ /* Most of the 'config' bits are OpenFlow soft state, but
+ * OFPPC_PORT_DOWN is maintained by the kernel. So transfer the
+ * OpenFlow bits from old_wdp_port. (make_wdp_port() only sets
+ * OFPPC_PORT_DOWN and leaves the other bits 0.) */
+ new_wdp_port->opp.config |= old_wdp_port->opp.config & ~OFPPC_PORT_DOWN;
+
+ if (wdp_port_equal(old_wdp_port, new_wdp_port)) {
+ /* False alarm--no change. */
+ wx_port_free(new_wdp_port);
+ return;
+ }
+ }
+
+ /* Now deal with the normal cases. */
+ if (old_wdp_port) {
+ wx_port_remove(wx, old_wdp_port);
+ }
+ if (new_wdp_port) {
+ wx_port_install(wx, new_wdp_port);
+ }
+ wx_port_free(old_wdp_port);
+
+ /* Update port groups. */
+ wx_port_refresh_groups(wx);
+ }
+
+ static int
+ wx_port_init(struct wx *wx)
+ {
+ struct xflow_port *ports;
+ size_t n_ports;
+ size_t i;
+ int error;
+
+ error = xfif_port_list(wx->xfif, &ports, &n_ports);
+ if (error) {
+ return error;
+ }
+
+ for (i = 0; i < n_ports; i++) {
+ const struct xflow_port *xflow_port = &ports[i];
+ if (!wx_port_conflicts(wx, xflow_port)) {
+ struct wdp_port *wdp_port = make_wdp_port(xflow_port);
+ if (wdp_port) {
+ wx_port_install(wx, wdp_port);
+ }
+ }
+ }
+ free(ports);
+ wx_port_refresh_groups(wx);
+ return 0;
+ }
+ \f
+ void
+ wdp_xflow_register(void)
+ {
+ static const struct wdp_class wdp_xflow_class = {
+ NULL, /* name */
+ wx_run,
+ wx_wait,
+ wx_enumerate,
+ wx_open,
+ wx_close,
+ wx_get_all_names,
+ wx_destroy,
+ wx_get_features,
+ wx_get_stats,
+ wx_get_drop_frags,
+ wx_set_drop_frags,
+ wx_port_add,
+ wx_port_del,
+ wx_port_query_by_number,
+ wx_port_query_by_name,
+ wx_port_list,
+ wx_port_set_config,
+ wx_port_poll,
+ wx_port_poll_wait,
+ wx_flow_get,
+ wx_flow_match,
+ wx_flow_for_each_match,
+ wx_flow_get_stats,
+ wx_flow_overlaps,
+ wx_flow_put,
+ wx_flow_delete,
+ wx_flow_flush,
+ wx_flow_inject,
+ wx_execute,
+ wx_recv_get_mask,
+ wx_recv_set_mask,
+ wx_get_sflow_probability,
+ wx_set_sflow_probability,
+ wx_recv,
+ wx_recv_wait,
+ };
+
+ static bool inited = false;
+
+ struct svec types;
+ const char *type;
+ bool registered;
+ int i;
+
+ if (inited) {
+ return;
+ }
+ inited = true;
+
+ svec_init(&types);
+ xf_enumerate_types(&types);
+
+ registered = false;
+ SVEC_FOR_EACH (i, type, &types) {
+ struct wdp_class *class;
+
+ class = xmalloc(sizeof *class);
+ *class = wdp_xflow_class;
+ class->type = xstrdup(type);
+ if (registered) {
+ class->run = NULL;
+ class->wait = NULL;
+ }
+ if (!wdp_register_provider(class)) {
+ registered = true;
+ }
+ }
+
+ svec_destroy(&types);
+ }
git://git.onelab.eu / sliver-openvswitch.git / commitdiff