net/ipv6/exthdrs_offload.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      IPV6 GSO/GRO offload support
   4  *      Linux INET6 implementation
   5  *
   6  *      IPV6 Extension Header GSO/GRO support
   7  */
   8 #include <net/protocol.h>
   9 #include "ip6_offload.h"
  10
  11 static const struct net_offload rthdr_offload = {
  12         .flags          =       INET6_PROTO_GSO_EXTHDR,
  13 };
  14
  15 static const struct net_offload dstopt_offload = {
  16         .flags          =       INET6_PROTO_GSO_EXTHDR,
  17 };
  18
  19 static const struct net_offload hbh_offload = {
  20         .flags          =       INET6_PROTO_GSO_EXTHDR,
  21 };
  22
  23 int __init ipv6_exthdrs_offload_init(void)
  24 {
  25         int ret;
  26
  27         ret = inet6_add_offload(&rthdr_offload, IPPROTO_ROUTING);
  28         if (ret)
  29                 goto out;
  30
  31         ret = inet6_add_offload(&dstopt_offload, IPPROTO_DSTOPTS);
  32         if (ret)
  33                 goto out_rt;
  34
  35         ret = inet6_add_offload(&hbh_offload, IPPROTO_HOPOPTS);
  36         if (ret)
  37                 goto out_dstopts;
  38
  39 out:
  40         return ret;
  41
  42 out_dstopts:
  43         inet6_del_offload(&dstopt_offload, IPPROTO_DSTOPTS);
  44
  45 out_rt:
  46         inet6_del_offload(&rthdr_offload, IPPROTO_ROUTING);
  47         goto out;
  48 }