/*
- * Copyright (c) 2010 Nicira Networks.
+ * Copyright (c) 2010, 2011, 2012 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 "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);
-struct netdev_dummy_notifier {
- struct netdev_notifier notifier;
- struct list list_node;
- struct shash_node *shash_node;
-};
-
struct netdev_dev_dummy {
struct netdev_dev netdev_dev;
uint8_t hwaddr[ETH_ADDR_LEN];
int mtu;
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 netdev_dummy_notifiers =
- SHASH_INITIALIZER(&netdev_dummy_notifiers);
+static struct shash dummy_netdev_devs = SHASH_INITIALIZER(&dummy_netdev_devs);
static int netdev_dummy_create(const struct netdev_class *, const char *,
- const struct shash *, struct netdev_dev **);
+ struct netdev_dev **);
static void netdev_dummy_poll_notify(const struct netdev *);
static bool
static int
netdev_dummy_create(const struct netdev_class *class, const char *name,
- const struct shash *args OVS_UNUSED,
struct netdev_dev **netdev_devp)
{
static unsigned int n = 0xaa550000;
netdev_dev->hwaddr[5] = n;
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_, int ethertype OVS_UNUSED,
- struct netdev **netdevp)
+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_)
+{
+ struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+ netdev->listening = true;
+ return 0;
+}
+
+static int
+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_)
+{
+ struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+ ofpbuf_list_delete(&netdev->recv_queue);
+ return 0;
+}
+
static int
netdev_dummy_set_etheraddr(struct netdev *netdev,
const uint8_t mac[ETH_ADDR_LEN])
return 0;
}
+static int
+netdev_dummy_set_mtu(const struct netdev *netdev, int mtu)
+{
+ struct netdev_dev_dummy *dev =
+ netdev_dev_dummy_cast(netdev_get_dev(netdev));
+
+ dev->mtu = mtu;
+ return 0;
+}
+
static int
netdev_dummy_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
{
return 0;
}
-static int
-netdev_dummy_poll_add(struct netdev *netdev,
- void (*cb)(struct netdev_notifier *), void *aux,
- struct netdev_notifier **notifierp)
-{
- const char *name = netdev_get_name(netdev);
- struct netdev_dummy_notifier *notifier;
- struct list *list;
- struct shash_node *shash_node;
-
- shash_node = shash_find_data(&netdev_dummy_notifiers, name);
- if (!shash_node) {
- list = xmalloc(sizeof *list);
- list_init(list);
- shash_node = shash_add(&netdev_dummy_notifiers, name, list);
- } else {
- list = shash_node->data;
- }
-
- notifier = xmalloc(sizeof *notifier);
- netdev_notifier_init(¬ifier->notifier, netdev, cb, aux);
- list_push_back(list, ¬ifier->list_node);
- notifier->shash_node = shash_node;
-
- *notifierp = ¬ifier->notifier;
-
- return 0;
-}
-
-static void
-netdev_dummy_poll_remove(struct netdev_notifier *notifier_)
+static unsigned int
+netdev_dummy_change_seq(const struct netdev *netdev)
{
- struct netdev_dummy_notifier *notifier =
- CONTAINER_OF(notifier_, struct netdev_dummy_notifier, notifier);
-
- struct list *list;
-
- list = list_remove(¬ifier->list_node);
- if (list_is_empty(list)) {
- shash_delete(&netdev_dummy_notifiers, notifier->shash_node);
- free(list);
- }
-
- free(notifier);
+ return netdev_dev_dummy_cast(netdev_get_dev(netdev))->change_seq;
}
\f
/* Helper functions. */
static void
netdev_dummy_poll_notify(const struct netdev *netdev)
{
- const char *name = netdev_get_name(netdev);
- struct list *list = shash_find_data(&netdev_dummy_notifiers, name);
-
- if (list) {
- struct netdev_dummy_notifier *notifier;
+ struct netdev_dev_dummy *dev =
+ netdev_dev_dummy_cast(netdev_get_dev(netdev));
- LIST_FOR_EACH (notifier, list_node, list) {
- struct netdev_notifier *n = ¬ifier->notifier;
- n->cb(n);
- }
+ dev->change_seq++;
+ if (!dev->change_seq) {
+ dev->change_seq++;
}
}
netdev_dummy_create,
netdev_dummy_destroy,
- NULL,
+ NULL, /* get_config */
+ NULL, /* set_config */
netdev_dummy_open,
netdev_dummy_close,
- NULL, /* enumerate */
-
- NULL, /* 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_set_etheraddr,
netdev_dummy_get_etheraddr,
netdev_dummy_get_mtu,
+ netdev_dummy_set_mtu,
NULL, /* get_ifindex */
NULL, /* get_carrier */
+ NULL, /* get_carrier_resets */
+ NULL, /* get_miimon */
netdev_dummy_get_stats,
netdev_dummy_set_stats,
NULL, /* get_features */
NULL, /* set_advertisements */
- NULL, /* get_vlan_vid */
NULL, /* set_policing */
NULL, /* get_qos_types */
NULL, /* get_in6 */
NULL, /* add_router */
NULL, /* get_next_hop */
+ NULL, /* get_drv_info */
NULL, /* arp_lookup */
netdev_dummy_update_flags,
- netdev_dummy_poll_add,
- netdev_dummy_poll_remove,
+ 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");
+ }
+}
+
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);
+
+ 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);
}
projects / openvswitch / blobdiff