mirror of
https://github.com/openvswitch/ovs
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e0edde6fee
Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc. Feature #10593 Signed-off-by: Raju Subramanian <rsubramanian@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com>
1308 lines
34 KiB
C
1308 lines
34 KiB
C
/*
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* Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "dpif.h"
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "csum.h"
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#include "dpif.h"
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#include "dpif-provider.h"
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#include "dummy.h"
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#include "dynamic-string.h"
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#include "flow.h"
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#include "hmap.h"
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#include "list.h"
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#include "netdev.h"
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#include "netlink.h"
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#include "odp-util.h"
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#include "ofp-print.h"
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#include "ofpbuf.h"
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#include "packets.h"
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#include "poll-loop.h"
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#include "random.h"
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#include "shash.h"
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#include "sset.h"
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#include "timeval.h"
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#include "util.h"
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#include "vlog.h"
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VLOG_DEFINE_THIS_MODULE(dpif_netdev);
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/* Configuration parameters. */
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enum { MAX_PORTS = 256 }; /* Maximum number of ports. */
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enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
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/* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
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* headers to be aligned on a 4-byte boundary. */
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enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
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/* Queues. */
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enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */
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enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
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enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
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BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
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struct dp_netdev_queue {
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struct dpif_upcall *upcalls[MAX_QUEUE_LEN];
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unsigned int head, tail;
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};
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/* Datapath based on the network device interface from netdev.h. */
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struct dp_netdev {
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const struct dpif_class *class;
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char *name;
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int open_cnt;
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bool destroyed;
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struct dp_netdev_queue queues[N_QUEUES];
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struct hmap flow_table; /* Flow table. */
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/* Statistics. */
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long long int n_hit; /* Number of flow table matches. */
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long long int n_missed; /* Number of flow table misses. */
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long long int n_lost; /* Number of misses not passed to client. */
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/* Ports. */
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struct dp_netdev_port *ports[MAX_PORTS];
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struct list port_list;
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unsigned int serial;
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};
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/* A port in a netdev-based datapath. */
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struct dp_netdev_port {
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int port_no; /* Index into dp_netdev's 'ports'. */
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struct list node; /* Element in dp_netdev's 'port_list'. */
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struct netdev *netdev;
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char *type; /* Port type as requested by user. */
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};
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/* A flow in dp_netdev's 'flow_table'. */
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struct dp_netdev_flow {
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struct hmap_node node; /* Element in dp_netdev's 'flow_table'. */
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struct flow key;
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/* Statistics. */
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long long int used; /* Last used time, in monotonic msecs. */
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long long int packet_count; /* Number of packets matched. */
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long long int byte_count; /* Number of bytes matched. */
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uint8_t tcp_flags; /* Bitwise-OR of seen tcp_flags values. */
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/* Actions. */
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struct nlattr *actions;
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size_t actions_len;
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};
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/* Interface to netdev-based datapath. */
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struct dpif_netdev {
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struct dpif dpif;
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struct dp_netdev *dp;
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unsigned int dp_serial;
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};
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/* All netdev-based datapaths. */
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static struct shash dp_netdevs = SHASH_INITIALIZER(&dp_netdevs);
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/* Maximum port MTU seen so far. */
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static int max_mtu = ETH_PAYLOAD_MAX;
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static int get_port_by_number(struct dp_netdev *, uint16_t port_no,
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struct dp_netdev_port **portp);
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static int get_port_by_name(struct dp_netdev *, const char *devname,
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struct dp_netdev_port **portp);
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static void dp_netdev_free(struct dp_netdev *);
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static void dp_netdev_flow_flush(struct dp_netdev *);
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static int do_add_port(struct dp_netdev *, const char *devname,
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const char *type, uint16_t port_no);
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static int do_del_port(struct dp_netdev *, uint16_t port_no);
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static int dpif_netdev_open(const struct dpif_class *, const char *name,
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bool create, struct dpif **);
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static int dp_netdev_output_userspace(struct dp_netdev *, const struct ofpbuf *,
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int queue_no, const struct flow *,
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uint64_t arg);
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static void dp_netdev_execute_actions(struct dp_netdev *,
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struct ofpbuf *, struct flow *,
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const struct nlattr *actions,
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size_t actions_len);
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static struct dpif_netdev *
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dpif_netdev_cast(const struct dpif *dpif)
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{
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assert(dpif->dpif_class->open == dpif_netdev_open);
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return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
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}
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static struct dp_netdev *
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get_dp_netdev(const struct dpif *dpif)
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{
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return dpif_netdev_cast(dpif)->dp;
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}
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static struct dpif *
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create_dpif_netdev(struct dp_netdev *dp)
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{
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uint16_t netflow_id = hash_string(dp->name, 0);
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struct dpif_netdev *dpif;
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dp->open_cnt++;
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dpif = xmalloc(sizeof *dpif);
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dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
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dpif->dp = dp;
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dpif->dp_serial = dp->serial;
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return &dpif->dpif;
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}
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static int
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create_dp_netdev(const char *name, const struct dpif_class *class,
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struct dp_netdev **dpp)
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{
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struct dp_netdev *dp;
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int error;
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int i;
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dp = xzalloc(sizeof *dp);
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dp->class = class;
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dp->name = xstrdup(name);
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dp->open_cnt = 0;
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for (i = 0; i < N_QUEUES; i++) {
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dp->queues[i].head = dp->queues[i].tail = 0;
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}
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hmap_init(&dp->flow_table);
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list_init(&dp->port_list);
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error = do_add_port(dp, name, "internal", OVSP_LOCAL);
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if (error) {
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dp_netdev_free(dp);
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return error;
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}
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shash_add(&dp_netdevs, name, dp);
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*dpp = dp;
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return 0;
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}
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static int
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dpif_netdev_open(const struct dpif_class *class, const char *name,
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bool create, struct dpif **dpifp)
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{
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struct dp_netdev *dp;
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dp = shash_find_data(&dp_netdevs, name);
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if (!dp) {
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if (!create) {
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return ENODEV;
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} else {
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int error = create_dp_netdev(name, class, &dp);
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if (error) {
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return error;
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}
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assert(dp != NULL);
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}
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} else {
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if (dp->class != class) {
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return EINVAL;
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} else if (create) {
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return EEXIST;
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}
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}
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*dpifp = create_dpif_netdev(dp);
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return 0;
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}
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static void
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dp_netdev_purge_queues(struct dp_netdev *dp)
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{
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int i;
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for (i = 0; i < N_QUEUES; i++) {
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struct dp_netdev_queue *q = &dp->queues[i];
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while (q->tail != q->head) {
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struct dpif_upcall *upcall = q->upcalls[q->tail++ & QUEUE_MASK];
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ofpbuf_delete(upcall->packet);
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free(upcall);
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}
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}
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}
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static void
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dp_netdev_free(struct dp_netdev *dp)
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{
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struct dp_netdev_port *port, *next;
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dp_netdev_flow_flush(dp);
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LIST_FOR_EACH_SAFE (port, next, node, &dp->port_list) {
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do_del_port(dp, port->port_no);
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}
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dp_netdev_purge_queues(dp);
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hmap_destroy(&dp->flow_table);
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free(dp->name);
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free(dp);
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}
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static void
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dpif_netdev_close(struct dpif *dpif)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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assert(dp->open_cnt > 0);
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if (--dp->open_cnt == 0 && dp->destroyed) {
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shash_find_and_delete(&dp_netdevs, dp->name);
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dp_netdev_free(dp);
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}
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free(dpif);
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}
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static int
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dpif_netdev_destroy(struct dpif *dpif)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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dp->destroyed = true;
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return 0;
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}
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static int
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dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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stats->n_flows = hmap_count(&dp->flow_table);
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stats->n_hit = dp->n_hit;
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stats->n_missed = dp->n_missed;
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stats->n_lost = dp->n_lost;
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return 0;
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}
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static int
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do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
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uint16_t port_no)
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{
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struct dp_netdev_port *port;
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struct netdev *netdev;
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const char *open_type;
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int mtu;
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int error;
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/* XXX reject devices already in some dp_netdev. */
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/* Open and validate network device. */
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open_type = (strcmp(type, "internal") ? type
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: dp->class != &dpif_netdev_class ? "dummy"
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: "tap");
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error = netdev_open(devname, open_type, &netdev);
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if (error) {
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return error;
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}
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/* XXX reject loopback devices */
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/* XXX reject non-Ethernet devices */
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error = netdev_listen(netdev);
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if (error) {
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VLOG_ERR("%s: cannot receive packets on this network device (%s)",
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devname, strerror(errno));
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netdev_close(netdev);
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return error;
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}
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error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, false);
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if (error) {
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netdev_close(netdev);
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return error;
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}
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port = xmalloc(sizeof *port);
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port->port_no = port_no;
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port->netdev = netdev;
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port->type = xstrdup(type);
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error = netdev_get_mtu(netdev, &mtu);
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if (!error) {
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max_mtu = mtu;
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}
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list_push_back(&dp->port_list, &port->node);
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dp->ports[port_no] = port;
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dp->serial++;
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return 0;
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}
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static int
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choose_port(struct dpif *dpif, struct netdev *netdev)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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int port_no;
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if (dpif->dpif_class != &dpif_netdev_class) {
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/* If the port name contains a number, try to assign that port number.
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* This can make writing unit tests easier because port numbers are
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* predictable. */
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const char *p;
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for (p = netdev_get_name(netdev); *p != '\0'; p++) {
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if (isdigit((unsigned char) *p)) {
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port_no = strtol(p, NULL, 10);
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if (port_no > 0 && port_no < MAX_PORTS
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&& !dp->ports[port_no]) {
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return port_no;
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}
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break;
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}
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}
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}
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for (port_no = 0; port_no < MAX_PORTS; port_no++) {
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if (!dp->ports[port_no]) {
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return port_no;
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}
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}
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return -1;
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}
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static int
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dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
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uint16_t *port_nop)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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int port_no;
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port_no = choose_port(dpif, netdev);
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if (port_no >= 0) {
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*port_nop = port_no;
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return do_add_port(dp, netdev_get_name(netdev),
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netdev_get_type(netdev), port_no);
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}
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return EFBIG;
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}
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static int
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dpif_netdev_port_del(struct dpif *dpif, uint16_t port_no)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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return port_no == OVSP_LOCAL ? EINVAL : do_del_port(dp, port_no);
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}
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static bool
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is_valid_port_number(uint16_t port_no)
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{
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return port_no < MAX_PORTS;
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}
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static int
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get_port_by_number(struct dp_netdev *dp,
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uint16_t port_no, struct dp_netdev_port **portp)
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{
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if (!is_valid_port_number(port_no)) {
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*portp = NULL;
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return EINVAL;
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} else {
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*portp = dp->ports[port_no];
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return *portp ? 0 : ENOENT;
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}
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}
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static int
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get_port_by_name(struct dp_netdev *dp,
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const char *devname, struct dp_netdev_port **portp)
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{
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struct dp_netdev_port *port;
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LIST_FOR_EACH (port, node, &dp->port_list) {
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if (!strcmp(netdev_get_name(port->netdev), devname)) {
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*portp = port;
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return 0;
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}
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}
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return ENOENT;
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}
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static int
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do_del_port(struct dp_netdev *dp, uint16_t port_no)
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{
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struct dp_netdev_port *port;
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char *name;
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int error;
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error = get_port_by_number(dp, port_no, &port);
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if (error) {
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return error;
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}
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list_remove(&port->node);
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dp->ports[port->port_no] = NULL;
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dp->serial++;
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name = xstrdup(netdev_get_name(port->netdev));
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netdev_close(port->netdev);
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free(port->type);
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free(name);
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free(port);
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return 0;
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}
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static void
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answer_port_query(const struct dp_netdev_port *port,
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struct dpif_port *dpif_port)
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{
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dpif_port->name = xstrdup(netdev_get_name(port->netdev));
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dpif_port->type = xstrdup(port->type);
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dpif_port->port_no = port->port_no;
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}
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static int
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dpif_netdev_port_query_by_number(const struct dpif *dpif, uint16_t port_no,
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struct dpif_port *dpif_port)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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struct dp_netdev_port *port;
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int error;
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error = get_port_by_number(dp, port_no, &port);
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if (!error) {
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answer_port_query(port, dpif_port);
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}
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return error;
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}
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static int
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dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
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struct dpif_port *dpif_port)
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{
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struct dp_netdev *dp = get_dp_netdev(dpif);
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struct dp_netdev_port *port;
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int error;
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error = get_port_by_name(dp, devname, &port);
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if (!error) {
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answer_port_query(port, dpif_port);
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}
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return error;
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}
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static int
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dpif_netdev_get_max_ports(const struct dpif *dpif OVS_UNUSED)
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{
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return MAX_PORTS;
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}
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||
|
||
static void
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dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
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{
|
||
hmap_remove(&dp->flow_table, &flow->node);
|
||
free(flow->actions);
|
||
free(flow);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_flow_flush(struct dp_netdev *dp)
|
||
{
|
||
struct dp_netdev_flow *flow, *next;
|
||
|
||
HMAP_FOR_EACH_SAFE (flow, next, node, &dp->flow_table) {
|
||
dp_netdev_free_flow(dp, flow);
|
||
}
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_flush(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
dp_netdev_flow_flush(dp);
|
||
return 0;
|
||
}
|
||
|
||
struct dp_netdev_port_state {
|
||
uint32_t port_no;
|
||
char *name;
|
||
};
|
||
|
||
static int
|
||
dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
|
||
{
|
||
*statep = xzalloc(sizeof(struct dp_netdev_port_state));
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
|
||
struct dpif_port *dpif_port)
|
||
{
|
||
struct dp_netdev_port_state *state = state_;
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
uint32_t port_no;
|
||
|
||
for (port_no = state->port_no; port_no < MAX_PORTS; port_no++) {
|
||
struct dp_netdev_port *port = dp->ports[port_no];
|
||
if (port) {
|
||
free(state->name);
|
||
state->name = xstrdup(netdev_get_name(port->netdev));
|
||
dpif_port->name = state->name;
|
||
dpif_port->type = port->type;
|
||
dpif_port->port_no = port->port_no;
|
||
state->port_no = port_no + 1;
|
||
return 0;
|
||
}
|
||
}
|
||
return EOF;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
|
||
{
|
||
struct dp_netdev_port_state *state = state_;
|
||
free(state->name);
|
||
free(state);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
|
||
{
|
||
struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
|
||
if (dpif->dp_serial != dpif->dp->serial) {
|
||
dpif->dp_serial = dpif->dp->serial;
|
||
return ENOBUFS;
|
||
} else {
|
||
return EAGAIN;
|
||
}
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_port_poll_wait(const struct dpif *dpif_)
|
||
{
|
||
struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
|
||
if (dpif->dp_serial != dpif->dp->serial) {
|
||
poll_immediate_wake();
|
||
}
|
||
}
|
||
|
||
static struct dp_netdev_flow *
|
||
dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *key)
|
||
{
|
||
struct dp_netdev_flow *flow;
|
||
|
||
HMAP_FOR_EACH_WITH_HASH (flow, node, flow_hash(key, 0), &dp->flow_table) {
|
||
if (flow_equal(&flow->key, key)) {
|
||
return flow;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
get_dpif_flow_stats(struct dp_netdev_flow *flow, struct dpif_flow_stats *stats)
|
||
{
|
||
stats->n_packets = flow->packet_count;
|
||
stats->n_bytes = flow->byte_count;
|
||
stats->used = flow->used;
|
||
stats->tcp_flags = flow->tcp_flags;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
|
||
struct flow *flow)
|
||
{
|
||
if (odp_flow_key_to_flow(key, key_len, flow)) {
|
||
/* This should not happen: it indicates that odp_flow_key_from_flow()
|
||
* and odp_flow_key_to_flow() disagree on the acceptable form of a
|
||
* flow. Log the problem as an error, with enough details to enable
|
||
* debugging. */
|
||
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
|
||
|
||
if (!VLOG_DROP_ERR(&rl)) {
|
||
struct ds s;
|
||
|
||
ds_init(&s);
|
||
odp_flow_key_format(key, key_len, &s);
|
||
VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
|
||
ds_destroy(&s);
|
||
}
|
||
|
||
return EINVAL;
|
||
}
|
||
|
||
if (flow->in_port < OFPP_MAX
|
||
? flow->in_port >= MAX_PORTS
|
||
: flow->in_port != OFPP_LOCAL && flow->in_port != OFPP_NONE) {
|
||
return EINVAL;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_get(const struct dpif *dpif,
|
||
const struct nlattr *nl_key, size_t nl_key_len,
|
||
struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_flow *flow;
|
||
struct flow key;
|
||
int error;
|
||
|
||
error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
flow = dp_netdev_lookup_flow(dp, &key);
|
||
if (!flow) {
|
||
return ENOENT;
|
||
}
|
||
|
||
if (stats) {
|
||
get_dpif_flow_stats(flow, stats);
|
||
}
|
||
if (actionsp) {
|
||
*actionsp = ofpbuf_clone_data(flow->actions, flow->actions_len);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
set_flow_actions(struct dp_netdev_flow *flow,
|
||
const struct nlattr *actions, size_t actions_len)
|
||
{
|
||
flow->actions = xrealloc(flow->actions, actions_len);
|
||
flow->actions_len = actions_len;
|
||
memcpy(flow->actions, actions, actions_len);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
add_flow(struct dpif *dpif, const struct flow *key,
|
||
const struct nlattr *actions, size_t actions_len)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_flow *flow;
|
||
int error;
|
||
|
||
flow = xzalloc(sizeof *flow);
|
||
flow->key = *key;
|
||
|
||
error = set_flow_actions(flow, actions, actions_len);
|
||
if (error) {
|
||
free(flow);
|
||
return error;
|
||
}
|
||
|
||
hmap_insert(&dp->flow_table, &flow->node, flow_hash(&flow->key, 0));
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
clear_stats(struct dp_netdev_flow *flow)
|
||
{
|
||
flow->used = 0;
|
||
flow->packet_count = 0;
|
||
flow->byte_count = 0;
|
||
flow->tcp_flags = 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_flow *flow;
|
||
struct flow key;
|
||
int error;
|
||
|
||
error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &key);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
flow = dp_netdev_lookup_flow(dp, &key);
|
||
if (!flow) {
|
||
if (put->flags & DPIF_FP_CREATE) {
|
||
if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
|
||
if (put->stats) {
|
||
memset(put->stats, 0, sizeof *put->stats);
|
||
}
|
||
return add_flow(dpif, &key, put->actions, put->actions_len);
|
||
} else {
|
||
return EFBIG;
|
||
}
|
||
} else {
|
||
return ENOENT;
|
||
}
|
||
} else {
|
||
if (put->flags & DPIF_FP_MODIFY) {
|
||
int error = set_flow_actions(flow, put->actions, put->actions_len);
|
||
if (!error) {
|
||
if (put->stats) {
|
||
get_dpif_flow_stats(flow, put->stats);
|
||
}
|
||
if (put->flags & DPIF_FP_ZERO_STATS) {
|
||
clear_stats(flow);
|
||
}
|
||
}
|
||
return error;
|
||
} else {
|
||
return EEXIST;
|
||
}
|
||
}
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_flow *flow;
|
||
struct flow key;
|
||
int error;
|
||
|
||
error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
flow = dp_netdev_lookup_flow(dp, &key);
|
||
if (flow) {
|
||
if (del->stats) {
|
||
get_dpif_flow_stats(flow, del->stats);
|
||
}
|
||
dp_netdev_free_flow(dp, flow);
|
||
return 0;
|
||
} else {
|
||
return ENOENT;
|
||
}
|
||
}
|
||
|
||
struct dp_netdev_flow_state {
|
||
uint32_t bucket;
|
||
uint32_t offset;
|
||
struct nlattr *actions;
|
||
struct odputil_keybuf keybuf;
|
||
struct dpif_flow_stats stats;
|
||
};
|
||
|
||
static int
|
||
dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
|
||
{
|
||
struct dp_netdev_flow_state *state;
|
||
|
||
*statep = state = xmalloc(sizeof *state);
|
||
state->bucket = 0;
|
||
state->offset = 0;
|
||
state->actions = NULL;
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_dump_next(const struct dpif *dpif, void *state_,
|
||
const struct nlattr **key, size_t *key_len,
|
||
const struct nlattr **actions, size_t *actions_len,
|
||
const struct dpif_flow_stats **stats)
|
||
{
|
||
struct dp_netdev_flow_state *state = state_;
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_flow *flow;
|
||
struct hmap_node *node;
|
||
|
||
node = hmap_at_position(&dp->flow_table, &state->bucket, &state->offset);
|
||
if (!node) {
|
||
return EOF;
|
||
}
|
||
|
||
flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
|
||
|
||
if (key) {
|
||
struct ofpbuf buf;
|
||
|
||
ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
|
||
odp_flow_key_from_flow(&buf, &flow->key);
|
||
|
||
*key = buf.data;
|
||
*key_len = buf.size;
|
||
}
|
||
|
||
if (actions) {
|
||
free(state->actions);
|
||
state->actions = xmemdup(flow->actions, flow->actions_len);
|
||
|
||
*actions = state->actions;
|
||
*actions_len = flow->actions_len;
|
||
}
|
||
|
||
if (stats) {
|
||
get_dpif_flow_stats(flow, &state->stats);
|
||
*stats = &state->stats;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
|
||
{
|
||
struct dp_netdev_flow_state *state = state_;
|
||
|
||
free(state->actions);
|
||
free(state);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_execute(struct dpif *dpif, const struct dpif_execute *execute)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct ofpbuf copy;
|
||
struct flow key;
|
||
int error;
|
||
|
||
if (execute->packet->size < ETH_HEADER_LEN ||
|
||
execute->packet->size > UINT16_MAX) {
|
||
return EINVAL;
|
||
}
|
||
|
||
/* Make a deep copy of 'packet', because we might modify its data. */
|
||
ofpbuf_init(©, DP_NETDEV_HEADROOM + execute->packet->size);
|
||
ofpbuf_reserve(©, DP_NETDEV_HEADROOM);
|
||
ofpbuf_put(©, execute->packet->data, execute->packet->size);
|
||
|
||
flow_extract(©, 0, 0, -1, &key);
|
||
error = dpif_netdev_flow_from_nlattrs(execute->key, execute->key_len,
|
||
&key);
|
||
if (!error) {
|
||
dp_netdev_execute_actions(dp, ©, &key,
|
||
execute->actions, execute->actions_len);
|
||
}
|
||
|
||
ofpbuf_uninit(©);
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_recv_set(struct dpif *dpif OVS_UNUSED, bool enable OVS_UNUSED)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
|
||
uint32_t queue_id, uint32_t *priority)
|
||
{
|
||
*priority = queue_id;
|
||
return 0;
|
||
}
|
||
|
||
static struct dp_netdev_queue *
|
||
find_nonempty_queue(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
int i;
|
||
|
||
for (i = 0; i < N_QUEUES; i++) {
|
||
struct dp_netdev_queue *q = &dp->queues[i];
|
||
if (q->head != q->tail) {
|
||
return q;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_recv(struct dpif *dpif, struct dpif_upcall *upcall,
|
||
struct ofpbuf *buf)
|
||
{
|
||
struct dp_netdev_queue *q = find_nonempty_queue(dpif);
|
||
if (q) {
|
||
struct dpif_upcall *u = q->upcalls[q->tail++ & QUEUE_MASK];
|
||
*upcall = *u;
|
||
free(u);
|
||
|
||
ofpbuf_uninit(buf);
|
||
*buf = *u->packet;
|
||
|
||
return 0;
|
||
} else {
|
||
return EAGAIN;
|
||
}
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_recv_wait(struct dpif *dpif)
|
||
{
|
||
if (find_nonempty_queue(dpif)) {
|
||
poll_immediate_wake();
|
||
} else {
|
||
/* No messages ready to be received, and dp_wait() will ensure that we
|
||
* wake up to queue new messages, so there is nothing to do. */
|
||
}
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_recv_purge(struct dpif *dpif)
|
||
{
|
||
struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
|
||
dp_netdev_purge_queues(dpif_netdev->dp);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_flow_used(struct dp_netdev_flow *flow, struct flow *key,
|
||
const struct ofpbuf *packet)
|
||
{
|
||
flow->used = time_msec();
|
||
flow->packet_count++;
|
||
flow->byte_count += packet->size;
|
||
flow->tcp_flags |= packet_get_tcp_flags(packet, key);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
|
||
struct ofpbuf *packet)
|
||
{
|
||
struct dp_netdev_flow *flow;
|
||
struct flow key;
|
||
|
||
if (packet->size < ETH_HEADER_LEN) {
|
||
return;
|
||
}
|
||
flow_extract(packet, 0, 0, port->port_no, &key);
|
||
flow = dp_netdev_lookup_flow(dp, &key);
|
||
if (flow) {
|
||
dp_netdev_flow_used(flow, &key, packet);
|
||
dp_netdev_execute_actions(dp, packet, &key,
|
||
flow->actions, flow->actions_len);
|
||
dp->n_hit++;
|
||
} else {
|
||
dp->n_missed++;
|
||
dp_netdev_output_userspace(dp, packet, DPIF_UC_MISS, &key, 0);
|
||
}
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_run(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_port *port;
|
||
struct ofpbuf packet;
|
||
|
||
ofpbuf_init(&packet, DP_NETDEV_HEADROOM + VLAN_ETH_HEADER_LEN + max_mtu);
|
||
|
||
LIST_FOR_EACH (port, node, &dp->port_list) {
|
||
int error;
|
||
|
||
/* Reset packet contents. */
|
||
ofpbuf_clear(&packet);
|
||
ofpbuf_reserve(&packet, DP_NETDEV_HEADROOM);
|
||
|
||
error = netdev_recv(port->netdev, &packet);
|
||
if (!error) {
|
||
dp_netdev_port_input(dp, port, &packet);
|
||
} else if (error != EAGAIN && error != EOPNOTSUPP) {
|
||
static 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
|
||
dpif_netdev_wait(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_port *port;
|
||
|
||
LIST_FOR_EACH (port, node, &dp->port_list) {
|
||
netdev_recv_wait(port->netdev);
|
||
}
|
||
}
|
||
|
||
static void
|
||
dp_netdev_set_dl(struct ofpbuf *packet, const struct ovs_key_ethernet *eth_key)
|
||
{
|
||
struct eth_header *eh = packet->l2;
|
||
|
||
memcpy(eh->eth_src, eth_key->eth_src, sizeof eh->eth_src);
|
||
memcpy(eh->eth_dst, eth_key->eth_dst, sizeof eh->eth_dst);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_output_port(struct dp_netdev *dp, struct ofpbuf *packet,
|
||
uint16_t out_port)
|
||
{
|
||
struct dp_netdev_port *p = dp->ports[out_port];
|
||
if (p) {
|
||
netdev_send(p->netdev, packet);
|
||
}
|
||
}
|
||
|
||
static int
|
||
dp_netdev_output_userspace(struct dp_netdev *dp, const struct ofpbuf *packet,
|
||
int queue_no, const struct flow *flow, uint64_t arg)
|
||
{
|
||
struct dp_netdev_queue *q = &dp->queues[queue_no];
|
||
struct dpif_upcall *upcall;
|
||
struct ofpbuf *buf;
|
||
size_t key_len;
|
||
|
||
if (q->head - q->tail >= MAX_QUEUE_LEN) {
|
||
dp->n_lost++;
|
||
return ENOBUFS;
|
||
}
|
||
|
||
buf = ofpbuf_new(ODPUTIL_FLOW_KEY_BYTES + 2 + packet->size);
|
||
odp_flow_key_from_flow(buf, flow);
|
||
key_len = buf->size;
|
||
ofpbuf_pull(buf, key_len);
|
||
ofpbuf_reserve(buf, 2);
|
||
ofpbuf_put(buf, packet->data, packet->size);
|
||
|
||
upcall = xzalloc(sizeof *upcall);
|
||
upcall->type = queue_no;
|
||
upcall->packet = buf;
|
||
upcall->key = buf->base;
|
||
upcall->key_len = key_len;
|
||
upcall->userdata = arg;
|
||
|
||
q->upcalls[q->head++ & QUEUE_MASK] = upcall;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_sample(struct dp_netdev *dp,
|
||
struct ofpbuf *packet, struct flow *key,
|
||
const struct nlattr *action)
|
||
{
|
||
const struct nlattr *subactions = NULL;
|
||
const struct nlattr *a;
|
||
size_t left;
|
||
|
||
NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
|
||
int type = nl_attr_type(a);
|
||
|
||
switch ((enum ovs_sample_attr) type) {
|
||
case OVS_SAMPLE_ATTR_PROBABILITY:
|
||
if (random_uint32() >= nl_attr_get_u32(a)) {
|
||
return;
|
||
}
|
||
break;
|
||
|
||
case OVS_SAMPLE_ATTR_ACTIONS:
|
||
subactions = a;
|
||
break;
|
||
|
||
case OVS_SAMPLE_ATTR_UNSPEC:
|
||
case __OVS_SAMPLE_ATTR_MAX:
|
||
default:
|
||
NOT_REACHED();
|
||
}
|
||
}
|
||
|
||
dp_netdev_execute_actions(dp, packet, key, nl_attr_get(subactions),
|
||
nl_attr_get_size(subactions));
|
||
}
|
||
|
||
static void
|
||
dp_netdev_action_userspace(struct dp_netdev *dp,
|
||
struct ofpbuf *packet, struct flow *key,
|
||
const struct nlattr *a)
|
||
{
|
||
const struct nlattr *userdata_attr;
|
||
uint64_t userdata;
|
||
|
||
userdata_attr = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
|
||
userdata = userdata_attr ? nl_attr_get_u64(userdata_attr) : 0;
|
||
dp_netdev_output_userspace(dp, packet, DPIF_UC_ACTION, key, userdata);
|
||
}
|
||
|
||
static void
|
||
execute_set_action(struct ofpbuf *packet, const struct nlattr *a)
|
||
{
|
||
enum ovs_key_attr type = nl_attr_type(a);
|
||
const struct ovs_key_ipv4 *ipv4_key;
|
||
const struct ovs_key_tcp *tcp_key;
|
||
const struct ovs_key_udp *udp_key;
|
||
|
||
switch (type) {
|
||
case OVS_KEY_ATTR_TUN_ID:
|
||
case OVS_KEY_ATTR_PRIORITY:
|
||
case OVS_KEY_ATTR_IPV6:
|
||
/* not implemented */
|
||
break;
|
||
|
||
case OVS_KEY_ATTR_ETHERNET:
|
||
dp_netdev_set_dl(packet,
|
||
nl_attr_get_unspec(a, sizeof(struct ovs_key_ethernet)));
|
||
break;
|
||
|
||
case OVS_KEY_ATTR_IPV4:
|
||
ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
|
||
packet_set_ipv4(packet, ipv4_key->ipv4_src, ipv4_key->ipv4_dst,
|
||
ipv4_key->ipv4_tos, ipv4_key->ipv4_ttl);
|
||
break;
|
||
|
||
case OVS_KEY_ATTR_TCP:
|
||
tcp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
|
||
packet_set_tcp_port(packet, tcp_key->tcp_src, tcp_key->tcp_dst);
|
||
break;
|
||
|
||
case OVS_KEY_ATTR_UDP:
|
||
udp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
|
||
packet_set_udp_port(packet, udp_key->udp_src, udp_key->udp_dst);
|
||
break;
|
||
|
||
case OVS_KEY_ATTR_UNSPEC:
|
||
case OVS_KEY_ATTR_ENCAP:
|
||
case OVS_KEY_ATTR_ETHERTYPE:
|
||
case OVS_KEY_ATTR_IN_PORT:
|
||
case OVS_KEY_ATTR_VLAN:
|
||
case OVS_KEY_ATTR_ICMP:
|
||
case OVS_KEY_ATTR_ICMPV6:
|
||
case OVS_KEY_ATTR_ARP:
|
||
case OVS_KEY_ATTR_ND:
|
||
case __OVS_KEY_ATTR_MAX:
|
||
default:
|
||
NOT_REACHED();
|
||
}
|
||
}
|
||
|
||
static void
|
||
dp_netdev_execute_actions(struct dp_netdev *dp,
|
||
struct ofpbuf *packet, struct flow *key,
|
||
const struct nlattr *actions,
|
||
size_t actions_len)
|
||
{
|
||
const struct nlattr *a;
|
||
unsigned int left;
|
||
|
||
NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
|
||
const struct ovs_action_push_vlan *vlan;
|
||
int type = nl_attr_type(a);
|
||
|
||
switch ((enum ovs_action_attr) type) {
|
||
case OVS_ACTION_ATTR_OUTPUT:
|
||
dp_netdev_output_port(dp, packet, nl_attr_get_u32(a));
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_USERSPACE:
|
||
dp_netdev_action_userspace(dp, packet, key, a);
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_PUSH_VLAN:
|
||
vlan = nl_attr_get(a);
|
||
eth_push_vlan(packet, vlan->vlan_tci);
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_POP_VLAN:
|
||
eth_pop_vlan(packet);
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_SET:
|
||
execute_set_action(packet, nl_attr_get(a));
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_SAMPLE:
|
||
dp_netdev_sample(dp, packet, key, a);
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_UNSPEC:
|
||
case __OVS_ACTION_ATTR_MAX:
|
||
NOT_REACHED();
|
||
}
|
||
}
|
||
}
|
||
|
||
const struct dpif_class dpif_netdev_class = {
|
||
"netdev",
|
||
NULL, /* enumerate */
|
||
dpif_netdev_open,
|
||
dpif_netdev_close,
|
||
dpif_netdev_destroy,
|
||
dpif_netdev_run,
|
||
dpif_netdev_wait,
|
||
dpif_netdev_get_stats,
|
||
dpif_netdev_port_add,
|
||
dpif_netdev_port_del,
|
||
dpif_netdev_port_query_by_number,
|
||
dpif_netdev_port_query_by_name,
|
||
dpif_netdev_get_max_ports,
|
||
NULL, /* port_get_pid */
|
||
dpif_netdev_port_dump_start,
|
||
dpif_netdev_port_dump_next,
|
||
dpif_netdev_port_dump_done,
|
||
dpif_netdev_port_poll,
|
||
dpif_netdev_port_poll_wait,
|
||
dpif_netdev_flow_get,
|
||
dpif_netdev_flow_put,
|
||
dpif_netdev_flow_del,
|
||
dpif_netdev_flow_flush,
|
||
dpif_netdev_flow_dump_start,
|
||
dpif_netdev_flow_dump_next,
|
||
dpif_netdev_flow_dump_done,
|
||
dpif_netdev_execute,
|
||
NULL, /* operate */
|
||
dpif_netdev_recv_set,
|
||
dpif_netdev_queue_to_priority,
|
||
dpif_netdev_recv,
|
||
dpif_netdev_recv_wait,
|
||
dpif_netdev_recv_purge,
|
||
};
|
||
|
||
static void
|
||
dpif_dummy_register__(const char *type)
|
||
{
|
||
struct dpif_class *class;
|
||
|
||
class = xmalloc(sizeof *class);
|
||
*class = dpif_netdev_class;
|
||
class->type = xstrdup(type);
|
||
dp_register_provider(class);
|
||
}
|
||
|
||
void
|
||
dpif_dummy_register(bool override)
|
||
{
|
||
if (override) {
|
||
struct sset types;
|
||
const char *type;
|
||
|
||
sset_init(&types);
|
||
dp_enumerate_types(&types);
|
||
SSET_FOR_EACH (type, &types) {
|
||
if (!dp_unregister_provider(type)) {
|
||
dpif_dummy_register__(type);
|
||
}
|
||
}
|
||
sset_destroy(&types);
|
||
}
|
||
|
||
dpif_dummy_register__("dummy");
|
||
}
|