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Subject[Patch 8/9] generic netlink utility functions
From
Date
genetlink-utils.patch

Two utilities for simplifying usage of NETLINK_GENERIC
interface.

Signed-off-by: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com>

include/net/genetlink.h | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+)
Index: linux-2.6.16-rc5/include/net/genetlink.h
===================================================================
--- linux-2.6.16-rc5.orig/include/net/genetlink.h 2006-03-11 07:41:32.000000000 -0500
+++ linux-2.6.16-rc5/include/net/genetlink.h 2006-03-11 07:41:41.000000000 -0500
@@ -150,4 +150,24 @@ static inline int genlmsg_unicast(struct
return nlmsg_unicast(genl_sock, skb, pid);
}

+/**
+ * gennlmsg_data - head of message payload
+ * @gnlh: genetlink messsage header
+ */
+static inline void *genlmsg_data(const struct genlmsghdr *gnlh)
+{
+ return ((unsigned char *) gnlh + GENL_HDRLEN);
+}
+
+/**
+ * genlmsg_len - length of message payload
+ * @gnlh: genetlink message header
+ */
+static inline int genlmsg_len(const struct genlmsghdr *gnlh)
+{
+ struct nlmsghdr *nlh = (struct nlmsghdr *)((unsigned char *)gnlh -
+ NLMSG_HDRLEN);
+ return (nlh->nlmsg_len - GENL_HDRLEN - NLMSG_HDRLEN);
+}
+
#endif /* __NET_GENERIC_NETLINK_H */

-
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