/*
- * Copyright (c) 2010 Nicira Networks.
+ * Copyright (c) 2010, 2011 Nicira Networks.
* Distributed under the terms of the GNU GPL version 2.
*
* Significant portions of this file may be copied from parts of the Linux
* one of these locks if you don't want the vport to be deleted out from under
* you.
*
- * If you get a reference to a vport through a dp_port, it is protected
+ * If you get a reference to a vport through a datapath, it is protected
* by RCU and you need to hold rcu_read_lock instead when reading.
*
* If multiple locks are taken, the hierarchy is:
hlist_del(&vport->hash_node);
}
+static void release_vport(struct kobject *kobj)
+{
+ struct vport *p = container_of(kobj, struct vport, kobj);
+ kfree(p);
+}
+
+static struct kobj_type brport_ktype = {
+#ifdef CONFIG_SYSFS
+ .sysfs_ops = &brport_sysfs_ops,
+#endif
+ .release = release_vport
+};
+
/**
* vport_alloc - allocate and initialize new vport
*
* vport_priv(). vports that are no longer needed should be released with
* vport_free().
*/
-struct vport *vport_alloc(int priv_size, const struct vport_ops *ops)
+struct vport *vport_alloc(int priv_size, const struct vport_ops *ops, const struct vport_parms *parms)
{
struct vport *vport;
size_t alloc_size;
if (!vport)
return ERR_PTR(-ENOMEM);
+ vport->dp = parms->dp;
+ vport->port_no = parms->port_no;
+ atomic_set(&vport->sflow_pool, 0);
vport->ops = ops;
+ /* Initialize kobject for bridge. This will be added as
+ * /sys/class/net/<devname>/brport later, if sysfs is enabled. */
+ vport->kobj.kset = NULL;
+ kobject_init(&vport->kobj, &brport_ktype);
+
if (vport->ops->flags & VPORT_F_GEN_STATS) {
vport->percpu_stats = alloc_percpu(struct vport_percpu_stats);
if (!vport->percpu_stats)
if (vport->ops->flags & VPORT_F_GEN_STATS)
free_percpu(vport->percpu_stats);
- kfree(vport);
+ kobject_put(&vport->kobj);
}
/**
*
* @parms: Information about new vport.
*
- * Creates a new vport with the specified configuration (which is dependent
- * on device type). Both RTNL and vport locks must be held.
+ * Creates a new vport with the specified configuration (which is dependent on
+ * device type) and attaches it to a datapath. Both RTNL and vport locks must
+ * be held.
*/
struct vport *vport_add(const struct vport_parms *parms)
{
*
* @vport: vport to delete.
*
- * Deletes the specified device. The device must not be currently attached to
- * a datapath. It is possible to fail for reasons such as lack of memory.
- * Both RTNL and vport locks must be held.
+ * Detaches @vport from its datapath and destroys it. It is possible to fail
+ * for reasons such as lack of memory. Both RTNL and vport locks must be held.
*/
int vport_del(struct vport *vport)
{
ASSERT_RTNL();
ASSERT_VPORT();
- BUG_ON(vport_get_dp_port(vport));
unregister_vport(vport);
return vport->ops->destroy(vport);
}
-/**
- * vport_attach - attach a vport to a datapath
- *
- * @vport: vport to attach.
- * @dp_port: Datapath port to attach the vport to.
- *
- * Attaches a vport to a specific datapath so that packets may be exchanged.
- * Both ports must be currently unattached. @dp_port must be successfully
- * attached to a vport before it is connected to a datapath and must not be
- * modified while connected. RTNL lock and the appropriate DP mutex must be held.
- */
-int vport_attach(struct vport *vport, struct dp_port *dp_port)
-{
- ASSERT_RTNL();
-
- if (vport_get_dp_port(vport))
- return -EBUSY;
-
- if (vport->ops->attach) {
- int err;
-
- err = vport->ops->attach(vport);
- if (err)
- return err;
- }
-
- rcu_assign_pointer(vport->dp_port, dp_port);
-
- return 0;
-}
-
-/**
- * vport_detach - detach a vport from a datapath
- *
- * @vport: vport to detach.
- *
- * Detaches a vport from a datapath. May fail for a variety of reasons,
- * including lack of memory. RTNL lock and the appropriate DP mutex must be held.
- */
-int vport_detach(struct vport *vport)
-{
- struct dp_port *dp_port;
-
- ASSERT_RTNL();
-
- dp_port = vport_get_dp_port(vport);
- if (!dp_port)
- return -EINVAL;
-
- rcu_assign_pointer(vport->dp_port, NULL);
-
- if (vport->ops->detach)
- return vport->ops->detach(vport);
- else
- return 0;
-}
-
/**
* vport_set_mtu - set device MTU (for kernel callers)
*
ret = vport->ops->set_mtu(vport, mtu);
- if (!ret && !is_internal_vport(vport)) {
- struct dp_port *dp_port = vport_get_dp_port(vport);
-
- if (dp_port)
- set_internal_devs_mtu(dp_port->dp);
- }
+ if (!ret && !is_internal_vport(vport))
+ set_internal_devs_mtu(vport->dp);
return ret;
} else
return vport->ops->get_addr(vport);
}
-/**
- * vport_get_dp_port - retrieve attached datapath port
- *
- * @vport: vport from which to retrieve the datapath port.
- *
- * Retrieves the attached datapath port or null if not attached. Either RTNL
- * lock or rcu_read_lock must be held for the entire duration that the datapath
- * port is being accessed.
- */
-struct dp_port *vport_get_dp_port(const struct vport *vport)
-{
- return rcu_dereference(vport->dp_port);
-}
-
/**
* vport_get_kobj - retrieve associated kobj
*
return NULL;
}
+static int vport_call_get_stats(struct vport *vport, struct rtnl_link_stats64 *stats)
+{
+ int err;
+
+ rcu_read_lock();
+ err = vport->ops->get_stats(vport, stats);
+ rcu_read_unlock();
+
+ return err;
+}
+
/**
* vport_get_stats - retrieve device stats (for kernel callers)
*
*/
int vport_get_stats(struct vport *vport, struct rtnl_link_stats64 *stats)
{
- struct rtnl_link_stats64 dev_stats;
- struct rtnl_link_stats64 *dev_statsp = NULL;
- int err;
-
- if (vport->ops->get_stats) {
- if (vport->ops->flags & VPORT_F_GEN_STATS)
- dev_statsp = &dev_stats;
- else
- dev_statsp = stats;
-
- rcu_read_lock();
- err = vport->ops->get_stats(vport, dev_statsp);
- rcu_read_unlock();
+ int i;
- if (err)
- goto out;
- }
+ if (!(vport->ops->flags & VPORT_F_GEN_STATS))
+ return vport_call_get_stats(vport, stats);
- if (vport->ops->flags & VPORT_F_GEN_STATS) {
- int i;
+ /* We potentially have 3 sources of stats that need to be
+ * combined: those we have collected (split into err_stats and
+ * percpu_stats), offset_stats from set_stats(), and device
+ * error stats from get_stats() (for errors that happen
+ * downstream and therefore aren't reported through our
+ * vport_record_error() function). */
- /* We potentially have 3 sources of stats that need to be
- * combined: those we have collected (split into err_stats and
- * percpu_stats), offset_stats from set_stats(), and device
- * error stats from get_stats() (for errors that happen
- * downstream and therefore aren't reported through our
- * vport_record_error() function). */
+ spin_lock_bh(&vport->stats_lock);
- spin_lock_bh(&vport->stats_lock);
+ *stats = vport->offset_stats;
- *stats = vport->offset_stats;
+ stats->rx_errors += vport->err_stats.rx_errors;
+ stats->tx_errors += vport->err_stats.tx_errors;
+ stats->tx_dropped += vport->err_stats.tx_dropped;
+ stats->rx_dropped += vport->err_stats.rx_dropped;
- stats->rx_errors += vport->err_stats.rx_errors;
- stats->tx_errors += vport->err_stats.tx_errors;
- stats->tx_dropped += vport->err_stats.tx_dropped;
- stats->rx_dropped += vport->err_stats.rx_dropped;
+ spin_unlock_bh(&vport->stats_lock);
- spin_unlock_bh(&vport->stats_lock);
+ if (vport->ops->get_stats) {
+ struct rtnl_link_stats64 dev_stats;
+ int err;
- if (dev_statsp) {
- stats->rx_packets += dev_statsp->rx_packets;
- stats->tx_packets += dev_statsp->tx_packets;
- stats->rx_bytes += dev_statsp->rx_bytes;
- stats->tx_bytes += dev_statsp->tx_bytes;
- stats->rx_errors += dev_statsp->rx_errors;
- stats->tx_errors += dev_statsp->tx_errors;
- stats->rx_dropped += dev_statsp->rx_dropped;
- stats->tx_dropped += dev_statsp->tx_dropped;
- stats->multicast += dev_statsp->multicast;
- stats->collisions += dev_statsp->collisions;
- stats->rx_length_errors += dev_statsp->rx_length_errors;
- stats->rx_over_errors += dev_statsp->rx_over_errors;
- stats->rx_crc_errors += dev_statsp->rx_crc_errors;
- stats->rx_frame_errors += dev_statsp->rx_frame_errors;
- stats->rx_fifo_errors += dev_statsp->rx_fifo_errors;
- stats->rx_missed_errors += dev_statsp->rx_missed_errors;
- stats->tx_aborted_errors += dev_statsp->tx_aborted_errors;
- stats->tx_carrier_errors += dev_statsp->tx_carrier_errors;
- stats->tx_fifo_errors += dev_statsp->tx_fifo_errors;
- stats->tx_heartbeat_errors += dev_statsp->tx_heartbeat_errors;
- stats->tx_window_errors += dev_statsp->tx_window_errors;
- stats->rx_compressed += dev_statsp->rx_compressed;
- stats->tx_compressed += dev_statsp->tx_compressed;
- }
+ err = vport_call_get_stats(vport, &dev_stats);
+ if (err)
+ return err;
- for_each_possible_cpu(i) {
- const struct vport_percpu_stats *percpu_stats;
- struct vport_percpu_stats local_stats;
- unsigned seqcount;
+ stats->rx_errors += dev_stats.rx_errors;
+ stats->tx_errors += dev_stats.tx_errors;
+ stats->rx_dropped += dev_stats.rx_dropped;
+ stats->tx_dropped += dev_stats.tx_dropped;
+ stats->multicast += dev_stats.multicast;
+ stats->collisions += dev_stats.collisions;
+ stats->rx_length_errors += dev_stats.rx_length_errors;
+ stats->rx_over_errors += dev_stats.rx_over_errors;
+ stats->rx_crc_errors += dev_stats.rx_crc_errors;
+ stats->rx_frame_errors += dev_stats.rx_frame_errors;
+ stats->rx_fifo_errors += dev_stats.rx_fifo_errors;
+ stats->rx_missed_errors += dev_stats.rx_missed_errors;
+ stats->tx_aborted_errors += dev_stats.tx_aborted_errors;
+ stats->tx_carrier_errors += dev_stats.tx_carrier_errors;
+ stats->tx_fifo_errors += dev_stats.tx_fifo_errors;
+ stats->tx_heartbeat_errors += dev_stats.tx_heartbeat_errors;
+ stats->tx_window_errors += dev_stats.tx_window_errors;
+ stats->rx_compressed += dev_stats.rx_compressed;
+ stats->tx_compressed += dev_stats.tx_compressed;
+ }
- percpu_stats = per_cpu_ptr(vport->percpu_stats, i);
+ for_each_possible_cpu(i) {
+ const struct vport_percpu_stats *percpu_stats;
+ struct vport_percpu_stats local_stats;
+ unsigned seqcount;
- do {
- seqcount = read_seqcount_begin(&percpu_stats->seqlock);
- local_stats = *percpu_stats;
- } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount));
+ percpu_stats = per_cpu_ptr(vport->percpu_stats, i);
- stats->rx_bytes += local_stats.rx_bytes;
- stats->rx_packets += local_stats.rx_packets;
- stats->tx_bytes += local_stats.tx_bytes;
- stats->tx_packets += local_stats.tx_packets;
- }
+ do {
+ seqcount = read_seqcount_begin(&percpu_stats->seqlock);
+ local_stats = *percpu_stats;
+ } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount));
- err = 0;
- } else
- err = -EOPNOTSUPP;
+ stats->rx_bytes += local_stats.rx_bytes;
+ stats->rx_packets += local_stats.rx_packets;
+ stats->tx_bytes += local_stats.tx_bytes;
+ stats->tx_packets += local_stats.tx_packets;
+ }
-out:
- return err;
+ return 0;
}
/**
*
* @vport: vport from which to retrieve index
*
- * Retrieves the system interface index of the given device. Not all devices
- * will have system indexes, in which case the index of the datapath local
- * port is returned. Returns a negative index on error. Either RTNL lock or
+ * Retrieves the system interface index of the given device or 0 if
+ * the device does not have one (in the case of virtual ports).
+ * Returns a negative index on error. Either RTNL lock or
* rcu_read_lock must be held.
*/
int vport_get_ifindex(const struct vport *vport)
{
- const struct dp_port *dp_port;
-
if (vport->ops->get_ifindex)
return vport->ops->get_ifindex(vport);
-
- /* If we don't actually have an ifindex, use the local port's.
- * Userspace doesn't check it anyways. */
- dp_port = vport_get_dp_port(vport);
- if (!dp_port)
- return -EAGAIN;
-
- return vport_get_ifindex(dp_port->dp->ports[ODPP_LOCAL]->vport);
+ else
+ return 0;
}
/**
return vport->ops->get_mtu(vport);
}
+/**
+ * vport_get_config - retrieve device configuration
+ *
+ * @vport: vport from which to retrieve the configuration.
+ * @config: buffer to store config, which must be at least the length
+ * of VPORT_CONFIG_SIZE.
+ *
+ * Retrieves the configuration of the given device. Either RTNL lock or
+ * rcu_read_lock must be held.
+ */
+void vport_get_config(const struct vport *vport, void *config)
+{
+ if (vport->ops->get_config)
+ vport->ops->get_config(vport, config);
+}
+
/**
* vport_receive - pass up received packet to the datapath for processing
*
*/
void vport_receive(struct vport *vport, struct sk_buff *skb)
{
- struct dp_port *dp_port = vport_get_dp_port(vport);
-
- if (!dp_port) {
- vport_record_error(vport, VPORT_E_RX_DROPPED);
- kfree_skb(skb);
-
- return;
- }
-
if (vport->ops->flags & VPORT_F_GEN_STATS) {
struct vport_percpu_stats *stats;
if (!(vport->ops->flags & VPORT_F_TUN_ID))
OVS_CB(skb)->tun_id = 0;
- dp_process_received_packet(dp_port, skb);
+ dp_process_received_packet(vport, skb);
}
static inline unsigned packet_length(const struct sk_buff *skb)
if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
if (net_ratelimit())
pr_warn("%s: dropped over-mtu packet: %d > %d\n",
- dp_name(vport_get_dp_port(vport)->dp),
- packet_length(skb), mtu);
+ dp_name(vport->dp), packet_length(skb), mtu);
goto error;
}
projects / openvswitch / blobdiff