net: add net device refcount tracker to struct netdev_rx_queue

This helps debugging net device refcount leaks.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 143d60e..3d691fa 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -741,6 +741,8 @@ struct netdev_rx_queue {
 #endif
        struct kobject                  kobj;
        struct net_device               *dev;
+       netdevice_tracker               dev_tracker;
+
 #ifdef CONFIG_XDP_SOCKETS
        struct xsk_buff_pool            *pool;
 #endif

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index affe34d..27a7ac2 100644 (file)
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1004,7 +1004,7 @@ static void rx_queue_release(struct kobject *kobj)
 #endif
 
        memset(kobj, 0, sizeof(*kobj));
-       dev_put(queue->dev);
+       dev_put_track(queue->dev, &queue->dev_tracker);
 }
 
 static const void *rx_queue_namespace(struct kobject *kobj)
@@ -1044,7 +1044,7 @@ static int rx_queue_add_kobject(struct net_device *dev, int index)
        /* Kobject_put later will trigger rx_queue_release call which
         * decreases dev refcount: Take that reference here
         */
-       dev_hold(queue->dev);
+       dev_hold_track(queue->dev, &queue->dev_tracker, GFP_KERNEL);
 
        kobj->kset = dev->queues_kset;
        error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,