netlink: constify nlmsghdr arguments

Consitfy nlmsghdr arguments to a couple of functions as preparation
for the next patch, which will constify the netlink message data in
all nfnetlink users.

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 8 insertions, 7 deletions

diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 5ba398e90304..0fbecbbe8e9e 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -217,12 +217,13 @@ int netlink_sendskb(struct sock *sk, struct sk_buff *skb);
 
 struct netlink_callback
 {
-        struct sk_buff  *skb;
-        struct nlmsghdr *nlh;
-        int             (*dump)(struct sk_buff * skb, struct netlink_callback *cb);
-        int             (*done)(struct netlink_callback *cb);
-        int             family;
-        long            args[6];
+        struct sk_buff          *skb;
+        const struct nlmsghdr   *nlh;
+        int                     (*dump)(struct sk_buff * skb,
+                                        struct netlink_callback *cb);
+        int                     (*done)(struct netlink_callback *cb);
+        int                     family;
+        long                    args[6];
 };
 
 struct netlink_notify
@@ -258,7 +259,7 @@ __nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags)
         NLMSG_NEW(skb, pid, seq, type, len, 0)
 
 extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
-                              struct nlmsghdr *nlh,
+                              const struct nlmsghdr *nlh,
                               int (*dump)(struct sk_buff *skb, struct netlink_callback*),
                               int (*done)(struct netlink_callback*));