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net: add net device refcount tracker to struct neigh_parms

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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 20:22:09 -08:00 committed by Jakub Kicinski
parent 77a23b1f95
commit 08d622568e
2 changed files with 4 additions and 3 deletions
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1
include/net/neighbour.h
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@ -70,6 +70,7 @@ enum {
struct neigh_parms {
possible_net_t net;
struct net_device *dev;
netdevice_tracker dev_tracker;
struct list_head list;
int (*neigh_setup)(struct neighbour *);
struct neigh_table *tbl;

6
net/core/neighbour.c
View File

@ -1666,13 +1666,13 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
refcount_set(&p->refcnt, 1);
p->reachable_time =
neigh_rand_reach_time(NEIGH_VAR(p, BASE_REACHABLE_TIME));
dev_hold(dev);
dev_hold_track(dev, &p->dev_tracker, GFP_KERNEL);
p->dev = dev;
write_pnet(&p->net, net);
p->sysctl_table = NULL;
if (ops->ndo_neigh_setup && ops->ndo_neigh_setup(dev, p)) {
dev_put(dev);
dev_put_track(dev, &p->dev_tracker);
kfree(p);
return NULL;
}
@ -1703,7 +1703,7 @@ void neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms)
list_del(&parms->list);
parms->dead = 1;
write_unlock_bh(&tbl->lock);
dev_put(parms->dev);
dev_put_track(parms->dev, &parms->dev_tracker);
call_rcu(&parms->rcu_head, neigh_rcu_free_parms);
}
EXPORT_SYMBOL(neigh_parms_release);