net/ipv6/ila/ila_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <net/genetlink.h>
   3 #include <net/ila.h>
   4 #include <net/netns/generic.h>
   5 #include <uapi/linux/genetlink.h>
   6 #include "ila.h"
   7
   8 static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
   9         [ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
  10         [ILA_ATTR_LOCATOR_MATCH] = { .type = NLA_U64, },
  11         [ILA_ATTR_IFINDEX] = { .type = NLA_U32, },
  12         [ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
  13         [ILA_ATTR_IDENT_TYPE] = { .type = NLA_U8, },
  14 };
  15
  16 static const struct genl_ops ila_nl_ops[] = {
  17         {
  18                 .cmd = ILA_CMD_ADD,
  19                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
  20                 .doit = ila_xlat_nl_cmd_add_mapping,
  21                 .flags = GENL_ADMIN_PERM,
  22         },
  23         {
  24                 .cmd = ILA_CMD_DEL,
  25                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
  26                 .doit = ila_xlat_nl_cmd_del_mapping,
  27                 .flags = GENL_ADMIN_PERM,
  28         },
  29         {
  30                 .cmd = ILA_CMD_FLUSH,
  31                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
  32                 .doit = ila_xlat_nl_cmd_flush,
  33                 .flags = GENL_ADMIN_PERM,
  34         },
  35         {
  36                 .cmd = ILA_CMD_GET,
  37                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
  38                 .doit = ila_xlat_nl_cmd_get_mapping,
  39                 .start = ila_xlat_nl_dump_start,
  40                 .dumpit = ila_xlat_nl_dump,
  41                 .done = ila_xlat_nl_dump_done,
  42         },
  43 };
  44
  45 unsigned int ila_net_id;
  46
  47 struct genl_family ila_nl_family __ro_after_init = {
  48         .hdrsize        = 0,
  49         .name           = ILA_GENL_NAME,
  50         .version        = ILA_GENL_VERSION,
  51         .maxattr        = ILA_ATTR_MAX,
  52         .policy = ila_nl_policy,
  53         .netnsok        = true,
  54         .parallel_ops   = true,
  55         .module         = THIS_MODULE,
  56         .ops            = ila_nl_ops,
  57         .n_ops          = ARRAY_SIZE(ila_nl_ops),
  58         .resv_start_op  = ILA_CMD_FLUSH + 1,
  59 };
  60
  61 static __net_init int ila_init_net(struct net *net)
  62 {
  63         int err;
  64
  65         err = ila_xlat_init_net(net);
  66         if (err)
  67                 goto ila_xlat_init_fail;
  68
  69         return 0;
  70
  71 ila_xlat_init_fail:
  72         return err;
  73 }
  74
  75 static __net_exit void ila_exit_net(struct net *net)
  76 {
  77         ila_xlat_exit_net(net);
  78 }
  79
  80 static struct pernet_operations ila_net_ops = {
  81         .init = ila_init_net,
  82         .exit = ila_exit_net,
  83         .id   = &ila_net_id,
  84         .size = sizeof(struct ila_net),
  85 };
  86
  87 static int __init ila_init(void)
  88 {
  89         int ret;
  90
  91         ret = register_pernet_device(&ila_net_ops);
  92         if (ret)
  93                 goto register_device_fail;
  94
  95         ret = genl_register_family(&ila_nl_family);
  96         if (ret)
  97                 goto register_family_fail;
  98
  99         ret = ila_lwt_init();
 100         if (ret)
 101                 goto fail_lwt;
 102
 103         return 0;
 104
 105 fail_lwt:
 106         genl_unregister_family(&ila_nl_family);
 107 register_family_fail:
 108         unregister_pernet_device(&ila_net_ops);
 109 register_device_fail:
 110         return ret;
 111 }
 112
 113 static void __exit ila_fini(void)
 114 {
 115         ila_lwt_fini();
 116         genl_unregister_family(&ila_nl_family);
 117         unregister_pernet_device(&ila_net_ops);
 118 }
 119
 120 module_init(ila_init);
 121 module_exit(ila_fini);
 122 MODULE_AUTHOR("Tom Herbert <tom@herbertland.com>");
 123 MODULE_LICENSE("GPL");
 124 MODULE_DESCRIPTION("IPv6: Identifier Locator Addressing (ILA)");