Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/if_macvlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/if_tap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/nsproxy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/if_tun.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/cdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/idr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/uio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <net/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/virtio_net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/skb_array.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) struct macvtap_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct macvlan_dev vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct tap_dev    tap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * Variables for dealing with macvtaps device numbers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static dev_t macvtap_major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static const void *macvtap_net_namespace(struct device *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct net_device *dev = to_net_dev(d->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	return dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static struct class macvtap_class = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	.name = "macvtap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	.ns_type = &net_ns_type_operations,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	.namespace = macvtap_net_namespace,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) static struct cdev macvtap_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define TUN_OFFLOADS (NETIF_F_HW_CSUM | NETIF_F_TSO_ECN | NETIF_F_TSO | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		      NETIF_F_TSO6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) static void macvtap_count_tx_dropped(struct tap_dev *tap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct macvtap_dev *vlantap = container_of(tap, struct macvtap_dev, tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct macvlan_dev *vlan = &vlantap->vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	this_cpu_inc(vlan->pcpu_stats->tx_dropped);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static void macvtap_count_rx_dropped(struct tap_dev *tap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct macvtap_dev *vlantap = container_of(tap, struct macvtap_dev, tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct macvlan_dev *vlan = &vlantap->vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	macvlan_count_rx(vlan, 0, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static void macvtap_update_features(struct tap_dev *tap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 				    netdev_features_t features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct macvtap_dev *vlantap = container_of(tap, struct macvtap_dev, tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct macvlan_dev *vlan = &vlantap->vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	vlan->set_features = features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	netdev_update_features(vlan->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static int macvtap_newlink(struct net *src_net, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			   struct nlattr *tb[], struct nlattr *data[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			   struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	struct macvtap_dev *vlantap = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	INIT_LIST_HEAD(&vlantap->tap.queue_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	/* Since macvlan supports all offloads by default, make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	 * tap support all offloads also.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	vlantap->tap.tap_features = TUN_OFFLOADS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	/* Register callbacks for rx/tx drops accounting and updating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	 * net_device features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	vlantap->tap.count_tx_dropped = macvtap_count_tx_dropped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	vlantap->tap.count_rx_dropped = macvtap_count_rx_dropped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	vlantap->tap.update_features  = macvtap_update_features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	err = netdev_rx_handler_register(dev, tap_handle_frame, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	/* Don't put anything that may fail after macvlan_common_newlink
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	 * because we can't undo what it does.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	err = macvlan_common_newlink(src_net, dev, tb, data, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		netdev_rx_handler_unregister(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	vlantap->tap.dev = vlantap->vlan.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static void macvtap_dellink(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			    struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	struct macvtap_dev *vlantap = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	netdev_rx_handler_unregister(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	tap_del_queues(&vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	macvlan_dellink(dev, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static void macvtap_setup(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	macvlan_common_setup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	dev->tx_queue_len = TUN_READQ_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static struct rtnl_link_ops macvtap_link_ops __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	.kind		= "macvtap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	.setup		= macvtap_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	.newlink	= macvtap_newlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	.dellink	= macvtap_dellink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	.priv_size      = sizeof(struct macvtap_dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static int macvtap_device_event(struct notifier_block *unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 				unsigned long event, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	struct macvtap_dev *vlantap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	struct device *classdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	dev_t devt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	char tap_name[IFNAMSIZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (dev->rtnl_link_ops != &macvtap_link_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	snprintf(tap_name, IFNAMSIZ, "tap%d", dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	vlantap = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	case NETDEV_REGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		/* Create the device node here after the network device has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		 * been registered but before register_netdevice has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		 * finished running.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		err = tap_get_minor(macvtap_major, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			return notifier_from_errno(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		devt = MKDEV(MAJOR(macvtap_major), vlantap->tap.minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		classdev = device_create(&macvtap_class, &dev->dev, devt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 					 dev, tap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		if (IS_ERR(classdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			tap_free_minor(macvtap_major, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			return notifier_from_errno(PTR_ERR(classdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		err = sysfs_create_link(&dev->dev.kobj, &classdev->kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 					tap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			return notifier_from_errno(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	case NETDEV_UNREGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		/* vlan->minor == 0 if NETDEV_REGISTER above failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		if (vlantap->tap.minor == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		sysfs_remove_link(&dev->dev.kobj, tap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		devt = MKDEV(MAJOR(macvtap_major), vlantap->tap.minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		device_destroy(&macvtap_class, devt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		tap_free_minor(macvtap_major, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	case NETDEV_CHANGE_TX_QUEUE_LEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		if (tap_queue_resize(&vlantap->tap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			return NOTIFY_BAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static struct notifier_block macvtap_notifier_block __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	.notifier_call	= macvtap_device_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int macvtap_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	err = tap_create_cdev(&macvtap_cdev, &macvtap_major, "macvtap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			      THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	err = class_register(&macvtap_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	err = register_netdevice_notifier(&macvtap_notifier_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		goto out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	err = macvlan_link_register(&macvtap_link_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		goto out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) out4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	unregister_netdevice_notifier(&macvtap_notifier_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) out3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	class_unregister(&macvtap_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	tap_destroy_cdev(macvtap_major, &macvtap_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) module_init(macvtap_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static void macvtap_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	rtnl_link_unregister(&macvtap_link_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	unregister_netdevice_notifier(&macvtap_notifier_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	class_unregister(&macvtap_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	tap_destroy_cdev(macvtap_major, &macvtap_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) module_exit(macvtap_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) MODULE_ALIAS_RTNL_LINK("macvtap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) MODULE_AUTHOR("Arnd Bergmann <arnd@arndb.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) MODULE_LICENSE("GPL");