inet_diag: add module pointer to "struct inet_diag_handler"

Following patch is going to use RCU instead of
inet_diag_table_mutex acquisition.

This patch is a preparation, no change of behavior yet.

Signed-off-by: Eric Dumazet <[e-mail]>
Reviewed-by: Guillaume Nault <[e-mail]>
Reviewed-by: Kuniyuki Iwashima <[e-mail]>
Reviewed-by: Willem de Bruijn <[e-mail]>
Signed-off-by: Paolo Abeni <[e-mail]>

include/linux/inet_diag.h

···
 struct inet_hashinfo;
 
 struct inet_diag_handler {
+	struct module	*owner;
 	void		(*dump)(struct sk_buff *skb,
 				struct netlink_callback *cb,
 				const struct inet_diag_req_v2 *r);

net/dccp/diag.c

···
 }
 
 static const struct inet_diag_handler dccp_diag_handler = {
+	.owner		 = THIS_MODULE,
 	.dump		 = dccp_diag_dump,
 	.dump_one	 = dccp_diag_dump_one,
 	.idiag_get_info	 = dccp_diag_get_info,

net/ipv4/raw_diag.c

···
 #endif
 
 static const struct inet_diag_handler raw_diag_handler = {
+	.owner			= THIS_MODULE,
 	.dump			= raw_diag_dump,
 	.dump_one		= raw_diag_dump_one,
 	.idiag_get_info		= raw_diag_get_info,

net/ipv4/tcp_diag.c

···
 #endif
 
 static const struct inet_diag_handler tcp_diag_handler = {
+	.owner			= THIS_MODULE,
 	.dump			= tcp_diag_dump,
 	.dump_one		= tcp_diag_dump_one,
 	.idiag_get_info		= tcp_diag_get_info,

net/ipv4/udp_diag.c

···
 #endif
 
 static const struct inet_diag_handler udp_diag_handler = {
+	.owner		 = THIS_MODULE,
 	.dump		 = udp_diag_dump,
 	.dump_one	 = udp_diag_dump_one,
 	.idiag_get_info  = udp_diag_get_info,
···
 }
 
 static const struct inet_diag_handler udplite_diag_handler = {
+	.owner		 = THIS_MODULE,
 	.dump		 = udplite_diag_dump,
 	.dump_one	 = udplite_diag_dump_one,
 	.idiag_get_info  = udp_diag_get_info,

net/mptcp/mptcp_diag.c

···
 }
 
 static const struct inet_diag_handler mptcp_diag_handler = {
+	.owner		 = THIS_MODULE,
 	.dump		 = mptcp_diag_dump,
 	.dump_one	 = mptcp_diag_dump_one,
 	.idiag_get_info  = mptcp_diag_get_info,

net/sctp/diag.c

···
 }
 
 static const struct inet_diag_handler sctp_diag_handler = {
+	.owner		 = THIS_MODULE,
 	.dump		 = sctp_diag_dump,
 	.dump_one	 = sctp_diag_dump_one,
 	.idiag_get_info  = sctp_diag_get_info,