This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / net / genetlink.h

diff --git a/include/net/genetlink.h b/include/net/genetlink.h
new file mode 100644 (file)
index 0000000..805de50
--- /dev/null
+++ b/include/net/genetlink.h
@@ -0,0 +1,153 @@
+#ifndef __NET_GENERIC_NETLINK_H
+#define __NET_GENERIC_NETLINK_H
+
+#include <linux/genetlink.h>
+#include <net/netlink.h>
+
+/**
+ * struct genl_family - generic netlink family
+ * @id: protocol family idenfitier
+ * @hdrsize: length of user specific header in bytes
+ * @name: name of family
+ * @version: protocol version
+ * @maxattr: maximum number of attributes supported
+ * @attrbuf: buffer to store parsed attributes
+ * @ops_list: list of all assigned operations
+ * @family_list: family list
+ */
+struct genl_family
+{
+       unsigned int            id;
+       unsigned int            hdrsize;
+       char                    name[GENL_NAMSIZ];
+       unsigned int            version;
+       unsigned int            maxattr;
+       struct nlattr **        attrbuf;        /* private */
+       struct list_head        ops_list;       /* private */
+       struct list_head        family_list;    /* private */
+};
+
+#define GENL_ADMIN_PERM                0x01
+
+/**
+ * struct genl_info - receiving information
+ * @snd_seq: sending sequence number
+ * @snd_pid: netlink pid of sender
+ * @nlhdr: netlink message header
+ * @genlhdr: generic netlink message header
+ * @userhdr: user specific header
+ * @attrs: netlink attributes
+ */
+struct genl_info
+{
+       u32                     snd_seq;
+       u32                     snd_pid;
+       struct nlmsghdr *       nlhdr;
+       struct genlmsghdr *     genlhdr;
+       void *                  userhdr;
+       struct nlattr **        attrs;
+};
+
+/**
+ * struct genl_ops - generic netlink operations
+ * @cmd: command identifier
+ * @flags: flags
+ * @policy: attribute validation policy
+ * @doit: standard command callback
+ * @dumpit: callback for dumpers
+ * @ops_list: operations list
+ */
+struct genl_ops
+{
+       u8                      cmd;
+       unsigned int            flags;
+       struct nla_policy       *policy;
+       int                    (*doit)(struct sk_buff *skb,
+                                      struct genl_info *info);
+       int                    (*dumpit)(struct sk_buff *skb,
+                                        struct netlink_callback *cb);
+       struct list_head        ops_list;
+};
+
+extern int genl_register_family(struct genl_family *family);
+extern int genl_unregister_family(struct genl_family *family);
+extern int genl_register_ops(struct genl_family *, struct genl_ops *ops);
+extern int genl_unregister_ops(struct genl_family *, struct genl_ops *ops);
+
+extern struct sock *genl_sock;
+
+/**
+ * genlmsg_put - Add generic netlink header to netlink message
+ * @skb: socket buffer holding the message
+ * @pid: netlink pid the message is addressed to
+ * @seq: sequence number (usually the one of the sender)
+ * @type: netlink message type
+ * @hdrlen: length of the user specific header
+ * @flags netlink message flags
+ * @cmd: generic netlink command
+ * @version: version
+ *
+ * Returns pointer to user specific header
+ */
+static inline void *genlmsg_put(struct sk_buff *skb, u32 pid, u32 seq,
+                               int type, int hdrlen, int flags,
+                               u8 cmd, u8 version)
+{
+       struct nlmsghdr *nlh;
+       struct genlmsghdr *hdr;
+
+       nlh = nlmsg_put(skb, pid, seq, type, GENL_HDRLEN + hdrlen, flags);
+       if (nlh == NULL)
+               return NULL;
+
+       hdr = nlmsg_data(nlh);
+       hdr->cmd = cmd;
+       hdr->version = version;
+       hdr->reserved = 0;
+
+       return (char *) hdr + GENL_HDRLEN;
+}
+
+/**
+ * genlmsg_end - Finalize a generic netlink message
+ * @skb: socket buffer the message is stored in
+ * @hdr: user specific header
+ */
+static inline int genlmsg_end(struct sk_buff *skb, void *hdr)
+{
+       return nlmsg_end(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);
+}
+
+/**
+ * genlmsg_cancel - Cancel construction of a generic netlink message
+ * @skb: socket buffer the message is stored in
+ * @hdr: generic netlink message header
+ */
+static inline int genlmsg_cancel(struct sk_buff *skb, void *hdr)
+{
+       return nlmsg_cancel(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);
+}
+
+/**
+ * genlmsg_multicast - multicast a netlink message
+ * @skb: netlink message as socket buffer
+ * @pid: own netlink pid to avoid sending to yourself
+ * @group: multicast group id
+ */
+static inline int genlmsg_multicast(struct sk_buff *skb, u32 pid,
+                                   unsigned int group)
+{
+       return nlmsg_multicast(genl_sock, skb, pid, group);
+}
+
+/**
+ * genlmsg_unicast - unicast a netlink message
+ * @skb: netlink message as socket buffer
+ * @pid: netlink pid of the destination socket
+ */
+static inline int genlmsg_unicast(struct sk_buff *skb, u32 pid)
+{
+       return nlmsg_unicast(genl_sock, skb, pid);
+}
+
+#endif /* __NET_GENERIC_NETLINK_H */