vport-gre.c 2.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103
  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Copyright (c) 2007-2014 Nicira, Inc.
  4. */
  5. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  6. #include <linux/if.h>
  7. #include <linux/skbuff.h>
  8. #include <linux/ip.h>
  9. #include <linux/if_tunnel.h>
  10. #include <linux/if_vlan.h>
  11. #include <linux/in.h>
  12. #include <linux/in_route.h>
  13. #include <linux/inetdevice.h>
  14. #include <linux/jhash.h>
  15. #include <linux/list.h>
  16. #include <linux/kernel.h>
  17. #include <linux/module.h>
  18. #include <linux/workqueue.h>
  19. #include <linux/rculist.h>
  20. #include <net/route.h>
  21. #include <net/xfrm.h>
  22. #include <net/icmp.h>
  23. #include <net/ip.h>
  24. #include <net/ip_tunnels.h>
  25. #include <net/gre.h>
  26. #include <net/net_namespace.h>
  27. #include <net/netns/generic.h>
  28. #include <net/protocol.h>
  29. #include "datapath.h"
  30. #include "vport.h"
  31. #include "vport-netdev.h"
  32. static struct vport_ops ovs_gre_vport_ops;
  33. static struct vport *gre_tnl_create(const struct vport_parms *parms)
  34. {
  35. struct net *net = ovs_dp_get_net(parms->dp);
  36. struct net_device *dev;
  37. struct vport *vport;
  38. int err;
  39. vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
  40. if (IS_ERR(vport))
  41. return vport;
  42. rtnl_lock();
  43. dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
  44. if (IS_ERR(dev)) {
  45. rtnl_unlock();
  46. ovs_vport_free(vport);
  47. return ERR_CAST(dev);
  48. }
  49. err = dev_change_flags(dev, dev->flags | IFF_UP, NULL);
  50. if (err < 0) {
  51. rtnl_delete_link(dev);
  52. rtnl_unlock();
  53. ovs_vport_free(vport);
  54. return ERR_PTR(err);
  55. }
  56. rtnl_unlock();
  57. return vport;
  58. }
  59. static struct vport *gre_create(const struct vport_parms *parms)
  60. {
  61. struct vport *vport;
  62. vport = gre_tnl_create(parms);
  63. if (IS_ERR(vport))
  64. return vport;
  65. return ovs_netdev_link(vport, parms->name);
  66. }
  67. static struct vport_ops ovs_gre_vport_ops = {
  68. .type = OVS_VPORT_TYPE_GRE,
  69. .create = gre_create,
  70. .send = dev_queue_xmit,
  71. .destroy = ovs_netdev_tunnel_destroy,
  72. };
  73. static int __init ovs_gre_tnl_init(void)
  74. {
  75. return ovs_vport_ops_register(&ovs_gre_vport_ops);
  76. }
  77. static void __exit ovs_gre_tnl_exit(void)
  78. {
  79. ovs_vport_ops_unregister(&ovs_gre_vport_ops);
  80. }
  81. module_init(ovs_gre_tnl_init);
  82. module_exit(ovs_gre_tnl_exit);
  83. MODULE_DESCRIPTION("OVS: GRE switching port");
  84. MODULE_LICENSE("GPL");
  85. MODULE_ALIAS("vport-type-3");