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ppp: add netns refcount tracker

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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 2021-12-09 23:44:26 -08:00 committed by Jakub Kicinski
parent 285ec2fef4
commit 11b311a867
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ppp/ppp_generic.c
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@ -173,6 +173,7 @@ struct channel {
spinlock_t downl; /* protects `chan', file.xq dequeue */
struct ppp *ppp; /* ppp unit we're connected to */
struct net *chan_net; /* the net channel belongs to */
netns_tracker ns_tracker;
struct list_head clist; /* link in list of channels per unit */
rwlock_t upl; /* protects `ppp' and 'bridge' */
struct channel __rcu *bridge; /* "bridged" ppp channel */
@ -2879,7 +2880,7 @@ int ppp_register_net_channel(struct net *net, struct ppp_channel *chan)
pch->ppp = NULL;
pch->chan = chan;
pch->chan_net = get_net(net);
pch->chan_net = get_net_track(net, &pch->ns_tracker, GFP_KERNEL);
chan->ppp = pch;
init_ppp_file(&pch->file, CHANNEL);
pch->file.hdrlen = chan->hdrlen;
@ -3519,7 +3520,7 @@ ppp_disconnect_channel(struct channel *pch)
*/
static void ppp_destroy_channel(struct channel *pch)
{
put_net(pch->chan_net);
put_net_track(pch->chan_net, &pch->ns_tracker);
pch->chan_net = NULL;
atomic_dec(&channel_count);