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vlan: add net device refcount tracker 

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2021-12-06 17:30:28 -08:00 committed by Jakub Kicinski
parent 08f0b22d73
commit 19c9ebf6ed
2 changed files with 5 additions and 2 deletions
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3
include/linux/if_vlan.h
View File

@ -162,6 +162,7 @@ struct netpoll;
* @vlan_id: VLAN identifier
* @flags: device flags
* @real_dev: underlying netdevice
* @dev_tracker: refcount tracker for @real_dev reference
* @real_dev_addr: address of underlying netdevice
* @dent: proc dir entry
* @vlan_pcpu_stats: ptr to percpu rx stats
@ -177,6 +178,8 @@ struct vlan_dev_priv {
u16 flags;
struct net_device *real_dev;
netdevice_tracker dev_tracker;
unsigned char real_dev_addr[ETH_ALEN];
struct proc_dir_entry *dent;

4
net/8021q/vlan_dev.c
View File

@ -616,7 +616,7 @@ static int vlan_dev_init(struct net_device *dev)
return -ENOMEM;
/* Get vlan's reference to real_dev */
dev_hold(real_dev);
dev_hold_track(real_dev, &vlan->dev_tracker, GFP_KERNEL);
return 0;
}
@ -848,7 +848,7 @@ static void vlan_dev_free(struct net_device *dev)
vlan->vlan_pcpu_stats = NULL;
/* Get rid of the vlan's reference to real_dev */
dev_put(vlan->real_dev);
dev_put_track(vlan->real_dev, &vlan->dev_tracker);
}
void vlan_setup(struct net_device *dev)