From 064af42167bf4fc9aaea2702d80ce08074b889c0 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Wed, 8 Jul 2009 13:19:16 -0700
Subject: Import from old repository commit
 61ef2b42a9c4ba8e1600f15bb0236765edc2ad45.

---
 .../linux-2.6/compat-2.6/include/net/genetlink.h   | 123 +++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 datapath/linux-2.6/compat-2.6/include/net/genetlink.h

(limited to 'datapath/linux-2.6/compat-2.6/include/net/genetlink.h')

diff --git a/datapath/linux-2.6/compat-2.6/include/net/genetlink.h b/datapath/linux-2.6/compat-2.6/include/net/genetlink.h
new file mode 100644
index 00000000..57a47316
--- /dev/null
+++ b/datapath/linux-2.6/compat-2.6/include/net/genetlink.h
@@ -0,0 +1,123 @@
+#ifndef __NET_GENERIC_NETLINK_WRAPPER_H
+#define __NET_GENERIC_NETLINK_WRAPPER_H 1
+
+
+#include <linux/netlink.h>
+#include_next <net/genetlink.h>
+
+#include <linux/version.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
+
+#include <linux/genetlink.h>
+
+/*----------------------------------------------------------------------------
+ * In 2.6.23, registering of multicast groups was added.  Our compatability 
+ * layer just supports registering a single group, since that's all we
+ * need.
+ */
+
+/**
+ * struct genl_multicast_group - generic netlink multicast group
+ * @name: name of the multicast group, names are per-family
+ * @id: multicast group ID, assigned by the core, to use with
+ *	  genlmsg_multicast().
+ * @list: list entry for linking
+ * @family: pointer to family, need not be set before registering
+ */
+struct genl_multicast_group
+{
+	struct genl_family  *family;	/* private */
+	struct list_head	list;	   /* private */
+	char name[GENL_NAMSIZ];
+	u32	id;
+};
+
+int genl_register_mc_group(struct genl_family *family,
+		struct genl_multicast_group *grp);
+#endif /* linux kernel < 2.6.23 */
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
+/**
+ * genlmsg_msg_size - length of genetlink message not including padding
+ * @payload: length of message payload
+ */
+static inline int genlmsg_msg_size(int payload)
+{
+	return GENL_HDRLEN + payload;
+}
+
+/**
+ * genlmsg_total_size - length of genetlink message including padding
+ * @payload: length of message payload
+ */
+static inline int genlmsg_total_size(int payload)
+{
+	return NLMSG_ALIGN(genlmsg_msg_size(payload));
+}
+
+#define genlmsg_multicast(s, p, g, f) \
+		genlmsg_multicast_flags((s), (p), (g), (f))
+
+static inline int genlmsg_multicast_flags(struct sk_buff *skb, u32 pid, 
+		unsigned int group, gfp_t flags)
+{
+	int err;
+
+	NETLINK_CB(skb).dst_group = group;
+
+	err = netlink_broadcast(genl_sock, skb, pid, group, flags);
+	if (err > 0)
+		err = 0;
+
+	return err;
+}
+#endif /* linux kernel < 2.6.19 */
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
+
+#define genlmsg_put(skb, p, seq, fam, flg, c) \
+	genlmsg_put((skb), (p), (seq), (fam)->id, (fam)->hdrsize, \
+			(flg), (c), (fam)->version)
+
+/**
+ * genlmsg_put_reply - Add generic netlink header to a reply message
+ * @skb: socket buffer holding the message
+ * @info: receiver info
+ * @family: generic netlink family
+ * @flags: netlink message flags
+ * @cmd: generic netlink command
+ *
+ * Returns pointer to user specific header
+ */
+static inline void *genlmsg_put_reply(struct sk_buff *skb,
+			struct genl_info *info, struct genl_family *family,
+			int flags, u8 cmd)
+{
+	return genlmsg_put(skb, info->snd_pid, info->snd_seq, family,
+				flags, cmd);
+}
+
+/**
+ * genlmsg_reply - reply to a request
+ * @skb: netlink message to be sent back
+ * @info: receiver information
+ */
+static inline int genlmsg_reply(struct sk_buff *skb, struct genl_info *info)
+{
+	return genlmsg_unicast(skb, info->snd_pid);
+}
+
+/**
+ * genlmsg_new - Allocate a new generic netlink message
+ * @payload: size of the message payload
+ * @flags: the type of memory to allocate.
+ */
+static inline struct sk_buff *genlmsg_new(size_t payload, gfp_t flags)
+{
+	return nlmsg_new(genlmsg_total_size(payload), flags);
+}
+#endif /* linux kernel < 2.6.20 */
+
+#endif /* genetlink.h */
-- 
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