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ipv4: add net device refcount tracker to struct in_device

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Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2021-12-04 20:22:12 -08:00 committed by Jakub Kicinski
parent 8c727003c4
commit c04438f58d
2 changed files with 4 additions and 2 deletions
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2
include/linux/inetdevice.h
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@ -24,6 +24,8 @@ struct ipv4_devconf {
struct in_device {
struct net_device *dev;
netdevice_tracker dev_tracker;
refcount_t refcnt;
int dead;
struct in_ifaddr __rcu *ifa_list;/* IP ifaddr chain */

4
net/ipv4/devinet.c
View File

@ -243,7 +243,7 @@ void in_dev_finish_destroy(struct in_device *idev)
#ifdef NET_REFCNT_DEBUG
pr_debug("%s: %p=%s\n", __func__, idev, dev ? dev->name : "NIL");
#endif
dev_put(dev);
dev_put_track(dev, &idev->dev_tracker);
if (!idev->dead)
pr_err("Freeing alive in_device %p\n", idev);
else
@ -271,7 +271,7 @@ static struct in_device *inetdev_init(struct net_device *dev)
if (IPV4_DEVCONF(in_dev->cnf, FORWARDING))
dev_disable_lro(dev);
/* Reference in_dev->dev */
dev_hold(dev);
dev_hold_track(dev, &in_dev->dev_tracker, GFP_KERNEL);
/* Account for reference dev->ip_ptr (below) */
refcount_set(&in_dev->refcnt, 1);