/*
- * Copyright (c) 2010, 2011 Nicira Networks.
+ * Copyright (c) 2010, 2011, 2012, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <errno.h>
+#include "flow.h"
#include "list.h"
#include "netdev-provider.h"
+#include "netdev-vport.h"
+#include "odp-util.h"
+#include "ofp-print.h"
+#include "ofpbuf.h"
#include "packets.h"
+#include "poll-loop.h"
#include "shash.h"
+#include "sset.h"
+#include "unixctl.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(netdev_dummy);
+#ifdef __FreeBSD__
+#define FREE_BSD 1
+#else
+#define FREE_BSD 0
+#endif
+
struct netdev_dev_dummy {
struct netdev_dev netdev_dev;
uint8_t hwaddr[ETH_ADDR_LEN];
struct netdev_stats stats;
enum netdev_flags flags;
unsigned int change_seq;
+
+ struct list devs; /* List of child "netdev_dummy"s. */
};
struct netdev_dummy {
struct netdev netdev;
+ struct list node; /* In netdev_dev_dummy's "devs" list. */
+ struct list recv_queue;
+ bool listening;
};
+static struct shash dummy_netdev_devs = SHASH_INITIALIZER(&dummy_netdev_devs);
+
+static unixctl_cb_func netdev_dummy_set_admin_state;
static int netdev_dummy_create(const struct netdev_class *, const char *,
struct netdev_dev **);
-static void netdev_dummy_poll_notify(const struct netdev *);
+static void netdev_dev_dummy_poll_notify(struct netdev_dev_dummy *);
+static int netdev_dev_dummy_update_flags(struct netdev_dev_dummy *,
+ enum netdev_flags off,
+ enum netdev_flags on,
+ enum netdev_flags *old_flagsp);
static bool
is_dummy_class(const struct netdev_class *class)
static struct netdev_dev_dummy *
netdev_dev_dummy_cast(const struct netdev_dev *netdev_dev)
{
- assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
+ ovs_assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
return CONTAINER_OF(netdev_dev, struct netdev_dev_dummy, netdev_dev);
}
netdev_dummy_cast(const struct netdev *netdev)
{
struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
- assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
+ ovs_assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
return CONTAINER_OF(netdev, struct netdev_dummy, netdev);
}
netdev_dev->mtu = 1500;
netdev_dev->flags = 0;
netdev_dev->change_seq = 1;
+ list_init(&netdev_dev->devs);
+
+ shash_add(&dummy_netdev_devs, name, netdev_dev);
n++;
{
struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
+ shash_find_and_delete(&dummy_netdev_devs,
+ netdev_dev_get_name(netdev_dev_));
free(netdev_dev);
}
static int
netdev_dummy_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
{
+ struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
struct netdev_dummy *netdev;
netdev = xmalloc(sizeof *netdev);
netdev_init(&netdev->netdev, netdev_dev_);
+ list_init(&netdev->recv_queue);
+ netdev->listening = false;
*netdevp = &netdev->netdev;
+ list_push_back(&netdev_dev->devs, &netdev->node);
return 0;
}
netdev_dummy_close(struct netdev *netdev_)
{
struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+ list_remove(&netdev->node);
+ ofpbuf_list_delete(&netdev->recv_queue);
free(netdev);
}
static int
-netdev_dummy_listen(struct netdev *netdev_ OVS_UNUSED)
+netdev_dummy_listen(struct netdev *netdev_)
{
- /* It's OK to listen on a dummy device. It just never receives any
- * packets. */
+ struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+ netdev->listening = true;
return 0;
}
static int
-netdev_dummy_recv(struct netdev *netdev_ OVS_UNUSED,
- void *buffer OVS_UNUSED, size_t size OVS_UNUSED)
+netdev_dummy_recv(struct netdev *netdev_, void *buffer, size_t size)
+{
+ struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+ struct ofpbuf *packet;
+ size_t packet_size;
+
+ if (list_is_empty(&netdev->recv_queue)) {
+ return -EAGAIN;
+ }
+
+ packet = ofpbuf_from_list(list_pop_front(&netdev->recv_queue));
+ if (packet->size > size) {
+ return -EMSGSIZE;
+ }
+ packet_size = packet->size;
+
+ memcpy(buffer, packet->data, packet->size);
+ ofpbuf_delete(packet);
+
+ return packet_size;
+}
+
+static void
+netdev_dummy_recv_wait(struct netdev *netdev_)
+{
+ struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+ if (!list_is_empty(&netdev->recv_queue)) {
+ poll_immediate_wake();
+ }
+}
+
+static int
+netdev_dummy_drain(struct netdev *netdev_)
{
- /* A dummy device never receives any packets. */
- return -EAGAIN;
+ struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+ ofpbuf_list_delete(&netdev->recv_queue);
+ return 0;
}
static int
if (!eth_addr_equals(dev->hwaddr, mac)) {
memcpy(dev->hwaddr, mac, ETH_ADDR_LEN);
- netdev_dummy_poll_notify(netdev);
+ netdev_dev_dummy_poll_notify(dev);
}
return 0;
struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
+ return netdev_dev_dummy_update_flags(dev, off, on, old_flagsp);
+}
+
+static int
+netdev_dev_dummy_update_flags(struct netdev_dev_dummy *dev,
+ enum netdev_flags off, enum netdev_flags on,
+ enum netdev_flags *old_flagsp)
+{
if ((off | on) & ~(NETDEV_UP | NETDEV_PROMISC)) {
return EINVAL;
}
dev->flags |= on;
dev->flags &= ~off;
if (*old_flagsp != dev->flags) {
- netdev_dummy_poll_notify(netdev);
+ netdev_dev_dummy_poll_notify(dev);
}
return 0;
}
/* Helper functions. */
static void
-netdev_dummy_poll_notify(const struct netdev *netdev)
+netdev_dev_dummy_poll_notify(struct netdev_dev_dummy *dev)
{
- struct netdev_dev_dummy *dev =
- netdev_dev_dummy_cast(netdev_get_dev(netdev));
-
dev->change_seq++;
if (!dev->change_seq) {
dev->change_seq++;
netdev_dummy_destroy,
NULL, /* get_config */
NULL, /* set_config */
+ NULL, /* get_tunnel_config */
netdev_dummy_open,
netdev_dummy_close,
- netdev_dummy_listen, /* listen */
- netdev_dummy_recv, /* recv */
- NULL, /* recv_wait */
- NULL, /* drain */
+ netdev_dummy_listen,
+ netdev_dummy_recv,
+ netdev_dummy_recv_wait,
+ netdev_dummy_drain,
NULL, /* send */
NULL, /* send_wait */
netdev_dummy_change_seq
};
+static struct ofpbuf *
+eth_from_packet_or_flow(const char *s)
+{
+ enum odp_key_fitness fitness;
+ struct ofpbuf *packet;
+ struct ofpbuf odp_key;
+ struct flow flow;
+ int error;
+
+ if (!eth_from_hex(s, &packet)) {
+ return packet;
+ }
+
+ /* Convert string to datapath key.
+ *
+ * It would actually be nicer to parse an OpenFlow-like flow key here, but
+ * the code for that currently calls exit() on parse error. We have to
+ * settle for parsing a datapath key for now.
+ */
+ ofpbuf_init(&odp_key, 0);
+ error = odp_flow_key_from_string(s, NULL, &odp_key);
+ if (error) {
+ ofpbuf_uninit(&odp_key);
+ return NULL;
+ }
+
+ /* Convert odp_key to flow. */
+ fitness = odp_flow_key_to_flow(odp_key.data, odp_key.size, &flow);
+ if (fitness == ODP_FIT_ERROR) {
+ ofpbuf_uninit(&odp_key);
+ return NULL;
+ }
+
+ packet = ofpbuf_new(0);
+ flow_compose(packet, &flow);
+
+ ofpbuf_uninit(&odp_key);
+ return packet;
+}
+
+static void
+netdev_dummy_receive(struct unixctl_conn *conn,
+ int argc, const char *argv[], void *aux OVS_UNUSED)
+{
+ struct netdev_dev_dummy *dummy_dev;
+ int n_listeners;
+ int i;
+
+ dummy_dev = shash_find_data(&dummy_netdev_devs, argv[1]);
+ if (!dummy_dev) {
+ unixctl_command_reply_error(conn, "no such dummy netdev");
+ return;
+ }
+
+ n_listeners = 0;
+ for (i = 2; i < argc; i++) {
+ struct netdev_dummy *dev;
+ struct ofpbuf *packet;
+
+ packet = eth_from_packet_or_flow(argv[i]);
+ if (!packet) {
+ unixctl_command_reply_error(conn, "bad packet syntax");
+ return;
+ }
+
+ n_listeners = 0;
+ LIST_FOR_EACH (dev, node, &dummy_dev->devs) {
+ if (dev->listening) {
+ struct ofpbuf *copy = ofpbuf_clone(packet);
+ list_push_back(&dev->recv_queue, ©->list_node);
+ n_listeners++;
+ }
+ }
+ ofpbuf_delete(packet);
+ }
+
+ if (!n_listeners) {
+ unixctl_command_reply(conn, "packets queued but nobody listened");
+ } else {
+ unixctl_command_reply(conn, "success");
+ }
+}
+
+static void
+netdev_dev_dummy_set_admin_state(struct netdev_dev_dummy *dev,
+ bool admin_state)
+{
+ enum netdev_flags old_flags;
+
+ if (admin_state) {
+ netdev_dev_dummy_update_flags(dev, 0, NETDEV_UP, &old_flags);
+ } else {
+ netdev_dev_dummy_update_flags(dev, NETDEV_UP, 0, &old_flags);
+ }
+}
+
+static void
+netdev_dummy_set_admin_state(struct unixctl_conn *conn, int argc,
+ const char *argv[], void *aux OVS_UNUSED)
+{
+ bool up;
+
+ if (!strcasecmp(argv[argc - 1], "up")) {
+ up = true;
+ } else if ( !strcasecmp(argv[argc - 1], "down")) {
+ up = false;
+ } else {
+ unixctl_command_reply_error(conn, "Invalid Admin State");
+ return;
+ }
+
+ if (argc > 2) {
+ struct netdev_dev_dummy *dummy_dev;
+
+ dummy_dev = shash_find_data(&dummy_netdev_devs, argv[1]);
+ if (dummy_dev) {
+ netdev_dev_dummy_set_admin_state(dummy_dev, up);
+ } else {
+ unixctl_command_reply_error(conn, "Unknown Dummy Interface");
+ return;
+ }
+ } else {
+ struct shash_node *node;
+
+ SHASH_FOR_EACH (node, &dummy_netdev_devs) {
+ netdev_dev_dummy_set_admin_state(node->data, up);
+ }
+ }
+ unixctl_command_reply(conn, "OK");
+}
+
void
-netdev_dummy_register(void)
+netdev_dummy_register(bool override)
{
+ unixctl_command_register("netdev-dummy/receive", "NAME PACKET|FLOW...",
+ 2, INT_MAX, netdev_dummy_receive, NULL);
+ unixctl_command_register("netdev-dummy/set-admin-state",
+ "[netdev] up|down", 1, 2,
+ netdev_dummy_set_admin_state, NULL);
+
+ if (override) {
+ struct sset types;
+ const char *type;
+
+ sset_init(&types);
+ netdev_enumerate_types(&types);
+ SSET_FOR_EACH (type, &types) {
+ if (!netdev_unregister_provider(type)) {
+ struct netdev_class *class;
+
+ class = xmalloc(sizeof *class);
+ *class = dummy_class;
+ class->type = xstrdup(type);
+ netdev_register_provider(class);
+ }
+ }
+ sset_destroy(&types);
+ }
netdev_register_provider(&dummy_class);
+
+ if (FREE_BSD) {
+ netdev_vport_tunnel_register();
+ }
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff