datapath/linux/compat/include/net/genetlink.h

   1 #ifndef __NET_GENERIC_NETLINK_WRAPPER_H
   2 #define __NET_GENERIC_NETLINK_WRAPPER_H 1
   3
   4 #include <linux/version.h>
   5 #include <linux/netlink.h>
   6 #include <net/net_namespace.h>
   7 #include_next <net/genetlink.h>
   8
   9 /*
  10  * 15e473046cb6e5d18a4d0057e61d76315230382b renames pid to portid
  11  * the affected structures are
  12  * netlink_skb_parms::pid -> portid
  13  * genl_info::snd_pid -> snd_portid
  14  */
  15 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
  16 #define snd_portid snd_pid
  17 #define portid pid
  18 #endif
  19
  20 #ifndef HAVE_GENL_NOTIFY_TAKES_FAMILY
  21 struct rpl_genl_family {
  22         struct genl_family      compat_family;
  23         unsigned int            id;
  24         unsigned int            hdrsize;
  25         char                    name[GENL_NAMSIZ];
  26         unsigned int            version;
  27         unsigned int            maxattr;
  28         bool                    netnsok;
  29         bool                    parallel_ops;
  30         int                     (*pre_doit)(const struct genl_ops *ops,
  31                                             struct sk_buff *skb,
  32                                             struct genl_info *info);
  33         void                    (*post_doit)(const struct genl_ops *ops,
  34                                              struct sk_buff *skb,
  35                                              struct genl_info *info);
  36         struct nlattr **        attrbuf;        /* private */
  37         const struct genl_ops * ops;            /* private */
  38         const struct genl_multicast_group *mcgrps; /* private */
  39         unsigned int            n_ops;          /* private */
  40         unsigned int            n_mcgrps;       /* private */
  41         unsigned int            mcgrp_offset;   /* private */
  42         struct list_head        family_list;    /* private */
  43         struct module           *module;
  44 };
  45
  46 #define genl_family rpl_genl_family
  47 #define genl_notify rpl_genl_notify
  48 void genl_notify(struct genl_family *family,
  49                  struct sk_buff *skb, struct net *net, u32 portid, u32 group,
  50                  struct nlmsghdr *nlh, gfp_t flags);
  51
  52 static inline void *rpl_genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
  53                                     struct genl_family *family, int flags, u8 cmd)
  54 {
  55         return genlmsg_put(skb, portid, seq, &family->compat_family, flags, cmd);
  56 }
  57
  58 #define genlmsg_put rpl_genlmsg_put
  59
  60 static inline int rpl_genl_unregister_family(struct genl_family *family)
  61 {
  62         return genl_unregister_family(&family->compat_family);
  63 }
  64 #define genl_unregister_family rpl_genl_unregister_family
  65
  66 #define genl_set_err rpl_genl_set_err
  67 static inline int genl_set_err(struct genl_family *family, struct net *net,
  68                                u32 portid, u32 group, int code)
  69 {
  70 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
  71         netlink_set_err(net->genl_sock, portid, group, code);
  72         return 0;
  73 #else
  74         return netlink_set_err(net->genl_sock, portid, group, code);
  75 #endif
  76 }
  77
  78 #define genlmsg_multicast_netns rpl_genlmsg_multicast_netns
  79 static inline int genlmsg_multicast_netns(struct genl_family *family,
  80                                           struct net *net, struct sk_buff *skb,
  81                                           u32 portid, unsigned int group, gfp_t flags)
  82 {
  83         return nlmsg_multicast(net->genl_sock, skb, portid, group, flags);
  84 }
  85
  86
  87 #define __genl_register_family rpl___genl_register_family
  88 int rpl___genl_register_family(struct genl_family *family);
  89
  90 #define genl_register_family rpl_genl_register_family
  91 static inline int rpl_genl_register_family(struct genl_family *family)
  92 {
  93         family->module = THIS_MODULE;
  94         return rpl___genl_register_family(family);
  95 }
  96
  97 #endif
  98
  99 #ifndef HAVE_GENLMSG_NEW_UNICAST
 100 static inline struct sk_buff *genlmsg_new_unicast(size_t payload,
 101                                                   struct genl_info *info,
 102                                                   gfp_t flags)
 103 {
 104         return genlmsg_new(payload, flags);
 105 }
 106 #endif
 107
 108 #ifndef HAVE_GENL_HAS_LISTENERS
 109 static inline int genl_has_listeners(struct genl_family *family,
 110                                      struct net *net, unsigned int group)
 111 {
 112 #ifdef HAVE_MCGRP_OFFSET
 113         if (WARN_ON_ONCE(group >= family->n_mcgrps))
 114                 return -EINVAL;
 115         group = family->mcgrp_offset + group;
 116 #endif
 117         return netlink_has_listeners(net->genl_sock, group);
 118 }
 119 #else
 120
 121 #ifndef HAVE_GENL_HAS_LISTENERS_TAKES_NET
 122 static inline int rpl_genl_has_listeners(struct genl_family *family,
 123                                          struct net *net, unsigned int group)
 124 {
 125 #ifdef HAVE_GENL_NOTIFY_TAKES_FAMILY
 126     return genl_has_listeners(family, net->genl_sock, group);
 127 #else
 128     return genl_has_listeners(&family->compat_family, net->genl_sock, group);
 129 #endif
 130 }
 131
 132 #define genl_has_listeners rpl_genl_has_listeners
 133 #endif
 134
 135 #endif /* HAVE_GENL_HAS_LISTENERS */
 136
 137 #ifndef HAVE_GENLMSG_PARSE
 138 static inline int genlmsg_parse(const struct nlmsghdr *nlh,
 139                                 const struct genl_family *family,
 140                                 struct nlattr *tb[], int maxtype,
 141                                 const struct nla_policy *policy)
 142 {
 143         return nlmsg_parse(nlh, family->hdrsize + GENL_HDRLEN, tb, maxtype,
 144                            policy);
 145 }
 146 #endif
 147
 148 #endif /* genetlink.h */