net: rose: add netdev ref tracker to 'struct rose_sock'

This will help debugging netdevice refcount problems with
CONFIG_NET_DEV_REFCNT_TRACKER=y

Signed-off-by: Eric Dumazet <[e-mail]>
Cc: Tested-by: Bernard Pidoux <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

include/net/rose.h

···
 	ax25_address		source_digis[ROSE_MAX_DIGIS];
 	ax25_address		dest_digis[ROSE_MAX_DIGIS];
 	struct rose_neigh	*neighbour;
-	struct net_device		*device;
+	struct net_device	*device;
+	netdevice_tracker	dev_tracker;
 	unsigned int		lci, rand;
 	unsigned char		state, condition, qbitincl, defer;
 	unsigned char		cause, diagnostic;

net/rose/af_rose.c

···
 			rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 			if (rose->neighbour)
 				rose->neighbour->use--;
-			dev_put(rose->device);
+			netdev_put(rose->device, &rose->dev_tracker);
 			rose->device = NULL;
 		}
 	}
···
 	rose->defer	= orose->defer;
 	rose->device	= orose->device;
 	if (rose->device)
-		dev_hold(rose->device);
+		netdev_hold(rose->device, &rose->dev_tracker, GFP_ATOMIC);
 	rose->qbitincl	= orose->qbitincl;
 
 	return sk;
···
 		break;
 	}
 
-	dev_put(rose->device);
+	netdev_put(rose->device, &rose->dev_tracker);
 	sock->sk = NULL;
 	release_sock(sk);
 	sock_put(sk);
···
 
 	rose->source_addr   = addr->srose_addr;
 	rose->device        = dev;
+	netdev_tracker_alloc(rose->device, &rose->dev_tracker, GFP_KERNEL);
 	rose->source_ndigis = addr->srose_ndigis;
 
 	if (addr_len == sizeof(struct full_sockaddr_rose)) {
···
 		memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 		rose->source_call = user->call;
 		rose->device      = dev;
+		netdev_tracker_alloc(rose->device, &rose->dev_tracker,
+				     GFP_KERNEL);
 		ax25_uid_put(user);
 
 		rose_insert_socket(sk);		/* Finish the bind */
···
 		make_rose->source_digis[n] = facilities.source_digis[n];
 	make_rose->neighbour     = neigh;
 	make_rose->device        = dev;
+	/* Caller got a reference for us. */
+	netdev_tracker_alloc(make_rose->device, &make_rose->dev_tracker,
+			     GFP_ATOMIC);
 	make_rose->facilities    = facilities;
 
 	make_rose->neighbour->use++;