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 static inline void *rpl_genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
  48                                     struct genl_family *family, int flags, u8 cmd)
  49 {
  50         return genlmsg_put(skb, portid, seq, &family->compat_family, flags, cmd);
  51 }
  52
  53 #define genlmsg_put rpl_genlmsg_put
  54
  55 static inline int rpl_genl_unregister_family(struct genl_family *family)
  56 {
  57         return genl_unregister_family(&family->compat_family);
  58 }
  59 #define genl_unregister_family rpl_genl_unregister_family
  60
  61 #define genl_set_err rpl_genl_set_err
  62 static inline int genl_set_err(struct genl_family *family, struct net *net,
  63                                u32 portid, u32 group, int code)
  64 {
  65 #ifdef HAVE_VOID_NETLINK_SET_ERR
  66         netlink_set_err(net->genl_sock, portid, group, code);
  67         return 0;
  68 #else
  69         return netlink_set_err(net->genl_sock, portid, group, code);
  70 #endif
  71 }
  72
  73 #define genlmsg_multicast_netns rpl_genlmsg_multicast_netns
  74 static inline int genlmsg_multicast_netns(struct genl_family *family,
  75                                           struct net *net, struct sk_buff *skb,
  76                                           u32 portid, unsigned int group, gfp_t flags)
  77 {
  78         return nlmsg_multicast(net->genl_sock, skb, portid, group, flags);
  79 }
  80
  81
  82 #define __genl_register_family rpl___genl_register_family
  83 int rpl___genl_register_family(struct genl_family *family);
  84
  85 #define genl_register_family rpl_genl_register_family
  86 static inline int rpl_genl_register_family(struct genl_family *family)
  87 {
  88         family->module = THIS_MODULE;
  89         return rpl___genl_register_family(family);
  90 }
  91 #endif
  92
  93 #ifdef HAVE_GENL_NOTIFY_TAKES_NET
  94 #define genl_notify rpl_genl_notify
  95 void rpl_genl_notify(struct genl_family *family, struct sk_buff *skb,
  96                      struct genl_info *info , u32 group, gfp_t flags);
  97 #endif
  98
  99 #ifndef HAVE_GENL_HAS_LISTENERS
 100 static inline int genl_has_listeners(struct genl_family *family,
 101                                      struct net *net, unsigned int group)
 102 {
 103 #ifdef HAVE_MCGRP_OFFSET
 104         if (WARN_ON_ONCE(group >= family->n_mcgrps))
 105                 return -EINVAL;
 106         group = family->mcgrp_offset + group;
 107 #endif
 108         return netlink_has_listeners(net->genl_sock, group);
 109 }
 110 #else
 111
 112 #ifndef HAVE_GENL_HAS_LISTENERS_TAKES_NET
 113 static inline int rpl_genl_has_listeners(struct genl_family *family,
 114                                          struct net *net, unsigned int group)
 115 {
 116 #ifdef HAVE_GENL_NOTIFY_TAKES_FAMILY
 117     return genl_has_listeners(family, net->genl_sock, group);
 118 #else
 119     return genl_has_listeners(&family->compat_family, net->genl_sock, group);
 120 #endif
 121 }
 122
 123 #define genl_has_listeners rpl_genl_has_listeners
 124 #endif
 125
 126 #endif /* HAVE_GENL_HAS_LISTENERS */
 127
 128 #ifndef HAVE_NETLINK_EXT_ACK
 129 struct netlink_ext_ack;
 130
 131 static inline int rpl_genlmsg_parse(const struct nlmsghdr *nlh,
 132                                     const struct genl_family *family,
 133                                     struct nlattr *tb[], int maxtype,
 134                                     const struct nla_policy *policy,
 135                                     struct netlink_ext_ack *extack)
 136 {
 137 #ifdef HAVE_GENLMSG_PARSE
 138         return genlmsg_parse(nlh, family, tb, maxtype, policy);
 139 #else
 140         return nlmsg_parse(nlh, family->hdrsize + GENL_HDRLEN, tb, maxtype,
 141                            policy);
 142 #endif
 143 }
 144 #define genlmsg_parse rpl_genlmsg_parse
 145 #endif
 146
 147 #endif /* genetlink.h */