#include "unaligned.h"
#include "timeval.h"
#include "unixctl.h"
+#include "reconnect.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(netdev_dummy);
-struct dummy_stream {
+struct reconnect;
+
+struct dummy_packet_stream {
struct stream *stream;
struct ofpbuf rxbuf;
struct list txq;
};
+enum dummy_packet_conn_type {
+ NONE, /* No connection is configured. */
+ PASSIVE, /* Listener. */
+ ACTIVE /* Connect to listener. */
+};
+
+struct dummy_packet_pconn {
+ struct pstream *pstream;
+ struct dummy_packet_stream *streams;
+ size_t n_streams;
+};
+
+struct dummy_packet_rconn {
+ struct dummy_packet_stream *rstream;
+ struct reconnect *reconnect;
+};
+
+struct dummy_packet_conn {
+ enum dummy_packet_conn_type type;
+ union {
+ struct dummy_packet_pconn pconn;
+ struct dummy_packet_rconn rconn;
+ } u;
+};
+
/* Protects 'dummy_list'. */
static struct ovs_mutex dummy_list_mutex = OVS_MUTEX_INITIALIZER;
enum netdev_flags flags OVS_GUARDED;
int ifindex OVS_GUARDED;
- struct pstream *pstream OVS_GUARDED;
- struct dummy_stream *streams OVS_GUARDED;
- size_t n_streams OVS_GUARDED;
+ struct dummy_packet_conn conn OVS_GUARDED;
FILE *tx_pcap, *rx_pcap OVS_GUARDED;
static int netdev_dummy_construct(struct netdev *);
static void netdev_dummy_queue_packet(struct netdev_dummy *, struct ofpbuf *);
-static void dummy_stream_close(struct dummy_stream *);
+static void dummy_packet_stream_close(struct dummy_packet_stream *);
static bool
is_dummy_class(const struct netdev_class *class)
}
static void
-netdev_dummy_run(void)
+dummy_packet_stream_init(struct dummy_packet_stream *s, struct stream *stream)
{
- struct netdev_dummy *dev;
+ int rxbuf_size = stream ? 2048 : 0;
+ s->stream = stream;
+ ofpbuf_init(&s->rxbuf, rxbuf_size);
+ list_init(&s->txq);
+}
- ovs_mutex_lock(&dummy_list_mutex);
- LIST_FOR_EACH (dev, list_node, &dummy_list) {
- size_t i;
+static struct dummy_packet_stream *
+dummy_packet_stream_create(struct stream *stream)
+{
+ struct dummy_packet_stream *s;
- ovs_mutex_lock(&dev->mutex);
+ s = xzalloc(sizeof *s);
+ dummy_packet_stream_init(s, stream);
- if (dev->pstream) {
- struct stream *new_stream;
- int error;
-
- error = pstream_accept(dev->pstream, &new_stream);
- if (!error) {
- struct dummy_stream *s;
-
- dev->streams = xrealloc(dev->streams,
- ((dev->n_streams + 1)
- * sizeof *dev->streams));
- s = &dev->streams[dev->n_streams++];
- s->stream = new_stream;
- ofpbuf_init(&s->rxbuf, 2048);
- list_init(&s->txq);
- } else if (error != EAGAIN) {
- VLOG_WARN("%s: accept failed (%s)",
- pstream_get_name(dev->pstream), ovs_strerror(error));
- pstream_close(dev->pstream);
- dev->pstream = NULL;
- }
- }
+ return s;
+}
- for (i = 0; i < dev->n_streams; i++) {
- struct dummy_stream *s = &dev->streams[i];
- int error = 0;
- size_t n;
-
- stream_run(s->stream);
-
- if (!list_is_empty(&s->txq)) {
- struct ofpbuf *txbuf;
- int retval;
-
- txbuf = ofpbuf_from_list(list_front(&s->txq));
- retval = stream_send(s->stream, txbuf->data, txbuf->size);
- if (retval > 0) {
- ofpbuf_pull(txbuf, retval);
- if (!txbuf->size) {
- list_remove(&txbuf->list_node);
- ofpbuf_delete(txbuf);
- }
- } else if (retval != -EAGAIN) {
- error = -retval;
- }
- }
+static void
+dummy_packet_stream_wait(struct dummy_packet_stream *s)
+{
+ stream_run_wait(s->stream);
+ if (!list_is_empty(&s->txq)) {
+ stream_send_wait(s->stream);
+ }
+ stream_recv_wait(s->stream);
+}
- if (!error) {
- if (s->rxbuf.size < 2) {
- n = 2 - s->rxbuf.size;
- } else {
- uint16_t frame_len;
-
- frame_len = ntohs(get_unaligned_be16(s->rxbuf.data));
- if (frame_len < ETH_HEADER_LEN) {
- error = EPROTO;
- n = 0;
- } else {
- n = (2 + frame_len) - s->rxbuf.size;
- }
- }
- }
- if (!error) {
- int retval;
-
- ofpbuf_prealloc_tailroom(&s->rxbuf, n);
- retval = stream_recv(s->stream, ofpbuf_tail(&s->rxbuf), n);
- if (retval > 0) {
- s->rxbuf.size += retval;
- if (retval == n && s->rxbuf.size > 2) {
- ofpbuf_pull(&s->rxbuf, 2);
- netdev_dummy_queue_packet(dev,
- ofpbuf_clone(&s->rxbuf));
- ofpbuf_clear(&s->rxbuf);
- }
- } else if (retval != -EAGAIN) {
- error = (retval < 0 ? -retval
- : s->rxbuf.size ? EPROTO
- : EOF);
- }
- }
+static void
+dummy_packet_stream_send(struct dummy_packet_stream *s, const void *buffer, size_t size)
+{
+ if (list_size(&s->txq) < NETDEV_DUMMY_MAX_QUEUE) {
+ struct ofpbuf *b;
- if (error) {
- VLOG_DBG("%s: closing connection (%s)",
- stream_get_name(s->stream),
- ovs_retval_to_string(error));
- dummy_stream_close(&dev->streams[i]);
- dev->streams[i] = dev->streams[--dev->n_streams];
+ b = ofpbuf_clone_data_with_headroom(buffer, size, 2);
+ put_unaligned_be16(ofpbuf_push_uninit(b, 2), htons(size));
+ list_push_back(&s->txq, &b->list_node);
+ }
+}
+
+static int
+dummy_packet_stream_run(struct netdev_dummy *dev, struct dummy_packet_stream *s)
+{
+ int error = 0;
+ size_t n;
+
+ stream_run(s->stream);
+
+ if (!list_is_empty(&s->txq)) {
+ struct ofpbuf *txbuf;
+ int retval;
+
+ txbuf = ofpbuf_from_list(list_front(&s->txq));
+ retval = stream_send(s->stream, txbuf->data, txbuf->size);
+ if (retval > 0) {
+ ofpbuf_pull(txbuf, retval);
+ if (!txbuf->size) {
+ list_remove(&txbuf->list_node);
+ ofpbuf_delete(txbuf);
}
+ } else if (retval != -EAGAIN) {
+ error = -retval;
}
+ }
- ovs_mutex_unlock(&dev->mutex);
+ if (!error) {
+ if (s->rxbuf.size < 2) {
+ n = 2 - s->rxbuf.size;
+ } else {
+ uint16_t frame_len;
+
+ frame_len = ntohs(get_unaligned_be16(s->rxbuf.data));
+ if (frame_len < ETH_HEADER_LEN) {
+ error = EPROTO;
+ n = 0;
+ } else {
+ n = (2 + frame_len) - s->rxbuf.size;
+ }
+ }
}
- ovs_mutex_unlock(&dummy_list_mutex);
+ if (!error) {
+ int retval;
+
+ ofpbuf_prealloc_tailroom(&s->rxbuf, n);
+ retval = stream_recv(s->stream, ofpbuf_tail(&s->rxbuf), n);
+ if (retval > 0) {
+ s->rxbuf.size += retval;
+ if (retval == n && s->rxbuf.size > 2) {
+ ofpbuf_pull(&s->rxbuf, 2);
+ netdev_dummy_queue_packet(dev,
+ ofpbuf_clone(&s->rxbuf));
+ ofpbuf_clear(&s->rxbuf);
+ }
+ } else if (retval != -EAGAIN) {
+ error = (retval < 0 ? -retval
+ : s->rxbuf.size ? EPROTO
+ : EOF);
+ }
+ }
+
+ return error;
}
static void
-dummy_stream_close(struct dummy_stream *s)
+dummy_packet_stream_close(struct dummy_packet_stream *s)
{
stream_close(s->stream);
ofpbuf_uninit(&s->rxbuf);
}
static void
-netdev_dummy_wait(void)
+dummy_packet_conn_init(struct dummy_packet_conn *conn)
{
- struct netdev_dummy *dev;
+ memset(conn, 0, sizeof *conn);
+ conn->type = NONE;
+}
- ovs_mutex_lock(&dummy_list_mutex);
- LIST_FOR_EACH (dev, list_node, &dummy_list) {
- size_t i;
+static void
+dummy_packet_conn_get_config(struct dummy_packet_conn *conn, struct smap *args)
+{
- ovs_mutex_lock(&dev->mutex);
- if (dev->pstream) {
- pstream_wait(dev->pstream);
+ switch (conn->type) {
+ case PASSIVE:
+ smap_add(args, "pstream", pstream_get_name(conn->u.pconn.pstream));
+ break;
+
+ case ACTIVE:
+ smap_add(args, "stream", stream_get_name(conn->u.rconn.rstream->stream));
+ break;
+
+ case NONE:
+ default:
+ break;
+ }
+}
+
+static void
+dummy_packet_conn_close(struct dummy_packet_conn *conn)
+{
+ int i;
+ struct dummy_packet_pconn *pconn = &conn->u.pconn;
+ struct dummy_packet_rconn *rconn = &conn->u.rconn;
+
+ switch (conn->type) {
+ case PASSIVE:
+ pstream_close(pconn->pstream);
+ for (i = 0; i < pconn->n_streams; i++) {
+ dummy_packet_stream_close(&pconn->streams[i]);
+ }
+ free(pconn->streams);
+ pconn->pstream = NULL;
+ pconn->streams = NULL;
+ break;
+
+ case ACTIVE:
+ dummy_packet_stream_close(rconn->rstream);
+ free(rconn->rstream);
+ rconn->rstream = NULL;
+ reconnect_destroy(rconn->reconnect);
+ rconn->reconnect = NULL;
+ break;
+
+ case NONE:
+ default:
+ break;
+ }
+
+ conn->type = NONE;
+ memset(conn, 0, sizeof *conn);
+}
+
+static void
+dummy_packet_conn_set_config(struct dummy_packet_conn *conn,
+ const struct smap *args)
+{
+ const char *pstream = smap_get(args, "pstream");
+ const char *stream = smap_get(args, "stream");
+
+ if (pstream && stream) {
+ VLOG_WARN("Open failed: both %s and %s are configured",
+ pstream, stream);
+ return;
+ }
+
+ switch (conn->type) {
+ case PASSIVE:
+ if (!strcmp(pstream_get_name(conn->u.pconn.pstream), pstream)) {
+ return;
+ }
+ dummy_packet_conn_close(conn);
+ break;
+ case ACTIVE:
+ if (!strcmp(stream_get_name(conn->u.rconn.rstream->stream), stream)) {
+ return;
+ }
+ dummy_packet_conn_close(conn);
+ break;
+ case NONE:
+ default:
+ break;
+ }
+
+ if (pstream) {
+ int error;
+
+ error = pstream_open(pstream, &conn->u.pconn.pstream, DSCP_DEFAULT);
+ if (error) {
+ VLOG_WARN("%s: open failed (%s)", pstream, ovs_strerror(error));
+ } else {
+ conn->type = PASSIVE;
+ }
+ }
+
+ if (stream) {
+ int error;
+ struct stream *active_stream;
+ struct reconnect *reconnect;;
+
+ reconnect = reconnect_create(time_msec());
+ reconnect_set_name(reconnect, stream);
+ reconnect_set_passive(reconnect, false, time_msec());
+ reconnect_enable(reconnect, time_msec());
+ reconnect_set_backoff(reconnect, 1000, INT_MAX);
+ conn->u.rconn.reconnect = reconnect;
+
+ error = stream_open(stream, &active_stream, DSCP_DEFAULT);
+ conn->u.rconn.rstream = dummy_packet_stream_create(active_stream);
+
+ switch (error) {
+ case 0:
+ reconnect_connected(conn->u.rconn.reconnect, time_msec());
+ conn->type = ACTIVE;
+ break;
+
+ case EAGAIN:
+ reconnect_connecting(conn->u.rconn.reconnect, time_msec());
+ break;
+
+ default:
+ reconnect_connecting(conn->u.rconn.reconnect, time_msec());
+ stream_close(active_stream);
+ break;
+ }
+ }
+}
+
+static void
+dummy_pconn_run(struct netdev_dummy *dev)
+ OVS_REQUIRES(dev->mutex)
+{
+ struct stream *new_stream;
+ struct dummy_packet_pconn *pconn = &dev->conn.u.pconn;
+ int error;
+ size_t i;
+
+ error = pstream_accept(pconn->pstream, &new_stream);
+ if (!error) {
+ struct dummy_packet_stream *s;
+
+ pconn->streams = xrealloc(pconn->streams,
+ ((pconn->n_streams + 1)
+ * sizeof *s));
+ s = &pconn->streams[pconn->n_streams++];
+ dummy_packet_stream_init(s, new_stream);
+ } else if (error != EAGAIN) {
+ VLOG_WARN("%s: accept failed (%s)",
+ pstream_get_name(pconn->pstream), ovs_strerror(error));
+ pstream_close(pconn->pstream);
+ pconn->pstream = NULL;
+ dev->conn.type = NONE;
+ }
+
+ for (i = 0; i < pconn->n_streams; i++) {
+ struct dummy_packet_stream *s = &pconn->streams[i];
+
+ error = dummy_packet_stream_run(dev, s);
+ if (error) {
+ VLOG_DBG("%s: closing connection (%s)",
+ stream_get_name(s->stream),
+ ovs_retval_to_string(error));
+ dummy_packet_stream_close(s);
+ pconn->streams[i] = pconn->streams[--pconn->n_streams];
}
- for (i = 0; i < dev->n_streams; i++) {
- struct dummy_stream *s = &dev->streams[i];
+ }
+}
- stream_run_wait(s->stream);
- if (!list_is_empty(&s->txq)) {
- stream_send_wait(s->stream);
+static void
+dummy_rconn_run(struct netdev_dummy *dev)
+OVS_REQUIRES(dev->mutex)
+{
+ struct dummy_packet_rconn *rconn = &dev->conn.u.rconn;
+
+ switch (reconnect_run(rconn->reconnect, time_msec())) {
+ case RECONNECT_CONNECT:
+ {
+ int err = stream_connect(rconn->rstream->stream);
+
+ switch (err) {
+ case 0: /* Connected. */
+ reconnect_connected(rconn->reconnect, time_msec());
+ dev->conn.type = ACTIVE;
+ break;
+
+ case EAGAIN:
+ reconnect_connecting(rconn->reconnect, time_msec());
+ return;
+
+ default:
+ reconnect_connect_failed(rconn->reconnect, time_msec(), err);
+ stream_close(rconn->rstream->stream);
+ return;
}
- stream_recv_wait(s->stream);
}
+ break;
+
+ case RECONNECT_DISCONNECT:
+ case RECONNECT_PROBE:
+ default:
+ break;
+ }
+
+ if (reconnect_is_connected(rconn->reconnect)) {
+ int err;
+
+ err = dummy_packet_stream_run(dev, rconn->rstream);
+
+ if (err) {
+ reconnect_disconnected(rconn->reconnect, time_msec(), err);
+ stream_close(rconn->rstream->stream);
+ }
+ }
+}
+
+static void
+dummy_packet_conn_run(struct netdev_dummy *dev)
+ OVS_REQUIRES(dev->mutex)
+{
+ switch (dev->conn.type) {
+ case PASSIVE:
+ dummy_pconn_run(dev);
+ break;
+
+ case ACTIVE:
+ dummy_rconn_run(dev);
+ break;
+
+ case NONE:
+ default:
+ break;
+ }
+}
+
+static void
+dummy_packet_conn_wait(struct dummy_packet_conn *conn)
+{
+ int i;
+ switch (conn->type) {
+ case PASSIVE:
+ pstream_wait(conn->u.pconn.pstream);
+ for (i = 0; i < conn->u.pconn.n_streams; i++) {
+ struct dummy_packet_stream *s = &conn->u.pconn.streams[i];
+ dummy_packet_stream_wait(s);
+ }
+ break;
+ case ACTIVE:
+ dummy_packet_stream_wait(conn->u.rconn.rstream);
+ break;
+
+ case NONE:
+ default:
+ break;
+ }
+}
+
+static void
+dummy_packet_conn_send(struct dummy_packet_conn *conn,
+ const void *buffer, size_t size)
+{
+ int i;
+
+ switch (conn->type) {
+ case PASSIVE:
+ for (i = 0; i < conn->u.pconn.n_streams; i++) {
+ struct dummy_packet_stream *s = &conn->u.pconn.streams[i];
+
+ dummy_packet_stream_send(s, buffer, size);
+ pstream_wait(conn->u.pconn.pstream);
+ }
+ break;
+
+ case ACTIVE:
+ dummy_packet_stream_send(conn->u.rconn.rstream, buffer, size);
+ dummy_packet_stream_wait(conn->u.rconn.rstream);
+ break;
+
+ case NONE:
+ default:
+ break;
+ }
+}
+
+static void
+netdev_dummy_run(void)
+{
+ struct netdev_dummy *dev;
+
+ ovs_mutex_lock(&dummy_list_mutex);
+ LIST_FOR_EACH (dev, list_node, &dummy_list) {
+ ovs_mutex_lock(&dev->mutex);
+ dummy_packet_conn_run(dev);
+ ovs_mutex_unlock(&dev->mutex);
+ }
+ ovs_mutex_unlock(&dummy_list_mutex);
+}
+
+static void
+netdev_dummy_wait(void)
+{
+ struct netdev_dummy *dev;
+
+ ovs_mutex_lock(&dummy_list_mutex);
+ LIST_FOR_EACH (dev, list_node, &dummy_list) {
+ ovs_mutex_lock(&dev->mutex);
+ dummy_packet_conn_wait(&dev->conn);
ovs_mutex_unlock(&dev->mutex);
}
ovs_mutex_unlock(&dummy_list_mutex);
netdev->flags = 0;
netdev->ifindex = -EOPNOTSUPP;
- netdev->pstream = NULL;
- netdev->streams = NULL;
- netdev->n_streams = 0;
+ dummy_packet_conn_init(&netdev->conn);
list_init(&netdev->rxes);
ovs_mutex_unlock(&netdev->mutex);
netdev_dummy_destruct(struct netdev *netdev_)
{
struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
- size_t i;
ovs_mutex_lock(&dummy_list_mutex);
list_remove(&netdev->list_node);
ovs_mutex_unlock(&dummy_list_mutex);
ovs_mutex_lock(&netdev->mutex);
- pstream_close(netdev->pstream);
- for (i = 0; i < netdev->n_streams; i++) {
- dummy_stream_close(&netdev->streams[i]);
- }
- free(netdev->streams);
+ dummy_packet_conn_close(&netdev->conn);
+ netdev->conn.type = NONE;
+
ovs_mutex_unlock(&netdev->mutex);
ovs_mutex_destroy(&netdev->mutex);
}
smap_add_format(args, "ifindex", "%d", netdev->ifindex);
}
- if (netdev->pstream) {
- smap_add(args, "pstream", pstream_get_name(netdev->pstream));
- }
+ dummy_packet_conn_get_config(&netdev->conn, args);
ovs_mutex_unlock(&netdev->mutex);
return 0;
netdev_dummy_set_config(struct netdev *netdev_, const struct smap *args)
{
struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
- const char *pstream;
const char *pcap;
ovs_mutex_lock(&netdev->mutex);
netdev->ifindex = smap_get_int(args, "ifindex", -EOPNOTSUPP);
- pstream = smap_get(args, "pstream");
- if (!pstream
- || !netdev->pstream
- || strcmp(pstream_get_name(netdev->pstream), pstream)) {
- pstream_close(netdev->pstream);
- netdev->pstream = NULL;
-
- if (pstream) {
- int error;
-
- error = pstream_open(pstream, &netdev->pstream, DSCP_DEFAULT);
- if (error) {
- VLOG_WARN("%s: open failed (%s)",
- pstream, ovs_strerror(error));
- }
- }
- }
+ dummy_packet_conn_set_config(&netdev->conn, args);
if (netdev->rx_pcap) {
fclose(netdev->rx_pcap);
netdev_dummy_send(struct netdev *netdev, const void *buffer, size_t size)
{
struct netdev_dummy *dev = netdev_dummy_cast(netdev);
- size_t i;
if (size < ETH_HEADER_LEN) {
return EMSGSIZE;
dev->stats.tx_packets++;
dev->stats.tx_bytes += size;
+ dummy_packet_conn_send(&dev->conn, buffer, size);
+
if (dev->tx_pcap) {
struct ofpbuf packet;
fflush(dev->tx_pcap);
}
- for (i = 0; i < dev->n_streams; i++) {
- struct dummy_stream *s = &dev->streams[i];
-
- if (list_size(&s->txq) < NETDEV_DUMMY_MAX_QUEUE) {
- struct ofpbuf *b;
-
- b = ofpbuf_clone_data_with_headroom(buffer, size, 2);
- put_unaligned_be16(ofpbuf_push_uninit(b, 2), htons(size));
- list_push_back(&s->txq, &b->list_node);
- }
- }
ovs_mutex_unlock(&dev->mutex);
return 0;
git://git.onelab.eu / sliver-openvswitch.git / blobdiff