mirror of
https://github.com/openvswitch/ovs
synced 2025-08-31 14:25:26 +00:00
datapath: Make adding and attaching a vport a single step.
For some time now, Open vSwitch datapaths have internally made a distinction between adding a vport and attaching it to a datapath. Adding a vport just means to create it, as an entity detached from any datapath. Attaching it gives it a port number and a datapath. Similarly, a vport could be detached and deleted separately. After some study, I think I understand why this distinction exists. It is because ovs-vswitchd tries to open all the datapath ports before it tries to create them. However, changing it to create them before it tries to open them is not difficult, so this commit does this. The bulk of this commit, however, changes the datapath interface to one that always creates a vport and attaches it to a datapath in a single step, and similarly detaches a vport and deletes it in a single step. Signed-off-by: Ben Pfaff <blp@nicira.com> Acked-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Ben Pfaff
@@ -495,9 +495,9 @@ netdev_linux_cache_cb(const struct rtnetlink_change *change,
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}
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}
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/* Creates the netdev device of 'type' with 'name'. */
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/* Creates system and internal devices. */
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static int
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netdev_linux_create_system(const struct netdev_class *class OVS_UNUSED,
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netdev_linux_create(const struct netdev_class *class,
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const char *name, const struct shash *args,
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struct netdev_dev **netdev_devp)
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{
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@@ -505,7 +505,8 @@ netdev_linux_create_system(const struct netdev_class *class OVS_UNUSED,
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int error;
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if (!shash_is_empty(args)) {
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VLOG_WARN("%s: arguments for system devices should be empty", name);
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VLOG_WARN("%s: arguments for %s devices should be empty",
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name, class->type);
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}
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if (!cache_notifier_refcount) {
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@@ -518,7 +519,7 @@ netdev_linux_create_system(const struct netdev_class *class OVS_UNUSED,
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cache_notifier_refcount++;
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netdev_dev = xzalloc(sizeof *netdev_dev);
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netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_linux_class);
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netdev_dev_init(&netdev_dev->netdev_dev, name, class);
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*netdev_devp = &netdev_dev->netdev_dev;
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return 0;
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@@ -629,9 +630,19 @@ netdev_linux_open(struct netdev_dev *netdev_dev_, int ethertype,
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netdev->fd = -1;
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netdev_init(&netdev->netdev, netdev_dev_);
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error = netdev_get_flags(&netdev->netdev, &flags);
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if (error == ENODEV) {
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goto error;
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/* Verify that the device really exists, by attempting to read its flags.
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* (The flags might be cached, in which case this won't actually do an
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* ioctl.)
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*
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* Don't do this for "internal" netdevs, though, because those have to be
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* created as netdev objects before they exist in the kernel, because
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* creating them in the kernel happens by passing a netdev object to
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* dpif_port_add(). */
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if (netdev_dev_get_class(netdev_dev_) != &netdev_internal_class) {
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error = netdev_get_flags(&netdev->netdev, &flags);
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if (error == ENODEV) {
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goto error;
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}
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}
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if (!strcmp(netdev_dev_get_type(netdev_dev_), "tap") &&
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@@ -2107,125 +2118,87 @@ netdev_linux_poll_remove(struct netdev_notifier *notifier_)
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}
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}
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const struct netdev_class netdev_linux_class = {
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"system",
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#define NETDEV_LINUX_CLASS(NAME, CREATE, ENUMERATE, SET_STATS) \
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{ \
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NAME, \
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\
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netdev_linux_init, \
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netdev_linux_run, \
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netdev_linux_wait, \
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\
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CREATE, \
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netdev_linux_destroy, \
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NULL, /* reconfigure */ \
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\
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netdev_linux_open, \
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netdev_linux_close, \
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\
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ENUMERATE, \
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\
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netdev_linux_recv, \
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netdev_linux_recv_wait, \
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netdev_linux_drain, \
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\
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netdev_linux_send, \
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netdev_linux_send_wait, \
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\
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netdev_linux_set_etheraddr, \
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netdev_linux_get_etheraddr, \
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netdev_linux_get_mtu, \
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netdev_linux_get_ifindex, \
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netdev_linux_get_carrier, \
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netdev_linux_get_stats, \
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SET_STATS, \
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\
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netdev_linux_get_features, \
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netdev_linux_set_advertisements, \
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netdev_linux_get_vlan_vid, \
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\
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netdev_linux_set_policing, \
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netdev_linux_get_qos_types, \
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netdev_linux_get_qos_capabilities, \
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netdev_linux_get_qos, \
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netdev_linux_set_qos, \
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netdev_linux_get_queue, \
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netdev_linux_set_queue, \
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netdev_linux_delete_queue, \
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netdev_linux_get_queue_stats, \
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netdev_linux_dump_queues, \
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netdev_linux_dump_queue_stats, \
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\
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netdev_linux_get_in4, \
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netdev_linux_set_in4, \
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netdev_linux_get_in6, \
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netdev_linux_add_router, \
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netdev_linux_get_next_hop, \
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netdev_linux_arp_lookup, \
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\
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netdev_linux_update_flags, \
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\
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netdev_linux_poll_add, \
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netdev_linux_poll_remove \
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}
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netdev_linux_init,
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netdev_linux_run,
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netdev_linux_wait,
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const struct netdev_class netdev_linux_class =
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NETDEV_LINUX_CLASS(
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"system",
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netdev_linux_create,
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netdev_linux_enumerate,
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netdev_vport_set_stats);
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netdev_linux_create_system,
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netdev_linux_destroy,
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NULL, /* reconfigure */
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const struct netdev_class netdev_tap_class =
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NETDEV_LINUX_CLASS(
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"tap",
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netdev_linux_create_tap,
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NULL, /* enumerate */
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NULL); /* set_stats */
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netdev_linux_open,
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netdev_linux_close,
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netdev_linux_enumerate,
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netdev_linux_recv,
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netdev_linux_recv_wait,
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netdev_linux_drain,
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netdev_linux_send,
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netdev_linux_send_wait,
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netdev_linux_set_etheraddr,
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netdev_linux_get_etheraddr,
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netdev_linux_get_mtu,
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netdev_linux_get_ifindex,
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netdev_linux_get_carrier,
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netdev_linux_get_stats,
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netdev_vport_set_stats,
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netdev_linux_get_features,
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netdev_linux_set_advertisements,
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netdev_linux_get_vlan_vid,
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netdev_linux_set_policing,
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netdev_linux_get_qos_types,
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netdev_linux_get_qos_capabilities,
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netdev_linux_get_qos,
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netdev_linux_set_qos,
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netdev_linux_get_queue,
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netdev_linux_set_queue,
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netdev_linux_delete_queue,
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netdev_linux_get_queue_stats,
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netdev_linux_dump_queues,
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netdev_linux_dump_queue_stats,
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netdev_linux_get_in4,
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netdev_linux_set_in4,
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netdev_linux_get_in6,
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netdev_linux_add_router,
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netdev_linux_get_next_hop,
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netdev_linux_arp_lookup,
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netdev_linux_update_flags,
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netdev_linux_poll_add,
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netdev_linux_poll_remove,
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};
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const struct netdev_class netdev_tap_class = {
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"tap",
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netdev_linux_init,
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netdev_linux_run,
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netdev_linux_wait,
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netdev_linux_create_tap,
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netdev_linux_destroy,
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NULL, /* reconfigure */
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netdev_linux_open,
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netdev_linux_close,
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NULL, /* enumerate */
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netdev_linux_recv,
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netdev_linux_recv_wait,
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netdev_linux_drain,
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netdev_linux_send,
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netdev_linux_send_wait,
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netdev_linux_set_etheraddr,
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netdev_linux_get_etheraddr,
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netdev_linux_get_mtu,
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netdev_linux_get_ifindex,
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netdev_linux_get_carrier,
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netdev_linux_get_stats,
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NULL, /* set_stats */
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netdev_linux_get_features,
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netdev_linux_set_advertisements,
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netdev_linux_get_vlan_vid,
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netdev_linux_set_policing,
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netdev_linux_get_qos_types,
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netdev_linux_get_qos_capabilities,
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netdev_linux_get_qos,
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netdev_linux_set_qos,
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netdev_linux_get_queue,
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netdev_linux_set_queue,
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netdev_linux_delete_queue,
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netdev_linux_get_queue_stats,
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netdev_linux_dump_queues,
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netdev_linux_dump_queue_stats,
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netdev_linux_get_in4,
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netdev_linux_set_in4,
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netdev_linux_get_in6,
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netdev_linux_add_router,
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netdev_linux_get_next_hop,
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netdev_linux_arp_lookup,
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netdev_linux_update_flags,
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netdev_linux_poll_add,
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netdev_linux_poll_remove,
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};
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const struct netdev_class netdev_internal_class =
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NETDEV_LINUX_CLASS(
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"internal",
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netdev_linux_create,
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NULL, /* enumerate */
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netdev_vport_set_stats);
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/* HTB traffic control class. */
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