ppp: add netns refcount tracker

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

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 1180a0e..9e52c5d 100644 (file)
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -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);