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 "ipvlan.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/if_tap.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.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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define TUN_OFFLOADS (NETIF_F_HW_CSUM | NETIF_F_TSO_ECN | NETIF_F_TSO | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		      NETIF_F_TSO6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) static dev_t ipvtap_major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static struct cdev ipvtap_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static const void *ipvtap_net_namespace(struct device *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct net_device *dev = to_net_dev(d->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	return dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static struct class ipvtap_class = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	 .name = "ipvtap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	 .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	 .ns_type = &net_ns_type_operations,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	 .namespace = ipvtap_net_namespace,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) struct ipvtap_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct ipvl_dev vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct tap_dev	  tap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static void ipvtap_count_tx_dropped(struct tap_dev *tap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct ipvtap_dev *vlantap = container_of(tap, struct ipvtap_dev, tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct ipvl_dev *vlan = &vlantap->vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	this_cpu_inc(vlan->pcpu_stats->tx_drps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static void ipvtap_count_rx_dropped(struct tap_dev *tap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct ipvtap_dev *vlantap = container_of(tap, struct ipvtap_dev, tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct ipvl_dev *vlan = &vlantap->vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	ipvlan_count_rx(vlan, 0, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static void ipvtap_update_features(struct tap_dev *tap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 				   netdev_features_t features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct ipvtap_dev *vlantap = container_of(tap, struct ipvtap_dev, tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct ipvl_dev *vlan = &vlantap->vlan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	vlan->sfeatures = features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	netdev_update_features(vlan->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static int ipvtap_newlink(struct net *src_net, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			  struct nlattr *tb[], struct nlattr *data[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			  struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct ipvtap_dev *vlantap = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	INIT_LIST_HEAD(&vlantap->tap.queue_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	/* Since macvlan supports all offloads by default, make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	 * tap support all offloads also.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	vlantap->tap.tap_features = TUN_OFFLOADS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	vlantap->tap.count_tx_dropped = ipvtap_count_tx_dropped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	vlantap->tap.update_features =	ipvtap_update_features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	vlantap->tap.count_rx_dropped = ipvtap_count_rx_dropped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	err = netdev_rx_handler_register(dev, tap_handle_frame, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	/* Don't put anything that may fail after macvlan_common_newlink
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	 * because we can't undo what it does.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	err =  ipvlan_link_new(src_net, dev, tb, data, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		netdev_rx_handler_unregister(dev);
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	vlantap->tap.dev = vlantap->vlan.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static void ipvtap_dellink(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			   struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	struct ipvtap_dev *vlan = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	netdev_rx_handler_unregister(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	tap_del_queues(&vlan->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	ipvlan_link_delete(dev, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static void ipvtap_setup(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	ipvlan_link_setup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	dev->tx_queue_len = TUN_READQ_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	dev->priv_flags &= ~IFF_NO_QUEUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static struct rtnl_link_ops ipvtap_link_ops __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	.kind		= "ipvtap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	.setup		= ipvtap_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	.newlink	= ipvtap_newlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	.dellink	= ipvtap_dellink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	.priv_size	= sizeof(struct ipvtap_dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int ipvtap_device_event(struct notifier_block *unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			       unsigned long event, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	struct ipvtap_dev *vlantap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	struct device *classdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	dev_t devt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	char tap_name[IFNAMSIZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (dev->rtnl_link_ops != &ipvtap_link_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	snprintf(tap_name, IFNAMSIZ, "tap%d", dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	vlantap = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	case NETDEV_REGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		/* Create the device node here after the network device has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		 * been registered but before register_netdevice has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		 * finished running.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		err = tap_get_minor(ipvtap_major, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			return notifier_from_errno(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		devt = MKDEV(MAJOR(ipvtap_major), vlantap->tap.minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		classdev = device_create(&ipvtap_class, &dev->dev, devt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 					 dev, tap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		if (IS_ERR(classdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			tap_free_minor(ipvtap_major, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			return notifier_from_errno(PTR_ERR(classdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		err = sysfs_create_link(&dev->dev.kobj, &classdev->kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 					tap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			return notifier_from_errno(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	case NETDEV_UNREGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		/* vlan->minor == 0 if NETDEV_REGISTER above failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		if (vlantap->tap.minor == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		sysfs_remove_link(&dev->dev.kobj, tap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		devt = MKDEV(MAJOR(ipvtap_major), vlantap->tap.minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		device_destroy(&ipvtap_class, devt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		tap_free_minor(ipvtap_major, &vlantap->tap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	case NETDEV_CHANGE_TX_QUEUE_LEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		if (tap_queue_resize(&vlantap->tap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			return NOTIFY_BAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static struct notifier_block ipvtap_notifier_block __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	.notifier_call	= ipvtap_device_event,
^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) static int ipvtap_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	err = tap_create_cdev(&ipvtap_cdev, &ipvtap_major, "ipvtap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			      THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	err = class_register(&ipvtap_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	err = register_netdevice_notifier(&ipvtap_notifier_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		goto out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	err = ipvlan_link_register(&ipvtap_link_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		goto out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) out4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	unregister_netdevice_notifier(&ipvtap_notifier_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) out3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	class_unregister(&ipvtap_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	tap_destroy_cdev(ipvtap_major, &ipvtap_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) module_init(ipvtap_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static void ipvtap_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	rtnl_link_unregister(&ipvtap_link_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	unregister_netdevice_notifier(&ipvtap_notifier_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	class_unregister(&ipvtap_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	tap_destroy_cdev(ipvtap_major, &ipvtap_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) module_exit(ipvtap_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) MODULE_ALIAS_RTNL_LINK("ipvtap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) MODULE_AUTHOR("Sainath Grandhi <sainath.grandhi@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) MODULE_LICENSE("GPL");