Commit 04a931e5 authored by Eric Dumazet's avatar Eric Dumazet Committed by Jakub Kicinski
Browse files

net: add netns refcount tracker to struct seq_net_private 



Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent ffa84b5f

fs/proc/proc_net.c

+16 −3
Original line number Diff line number Diff line
@@ -61,15 +61,27 @@ static int seq_open_net(struct inode *inode, struct file *file) 
	}

#ifdef CONFIG_NET_NS

	p->net = net;

	netns_tracker_alloc(net, &p->ns_tracker, GFP_KERNEL);

#endif

	return 0;

}



static void seq_file_net_put_net(struct seq_file *seq)

{

#ifdef CONFIG_NET_NS

	struct seq_net_private *priv = seq->private;



	put_net_track(priv->net, &priv->ns_tracker);

#else

	put_net(&init_net);

#endif

}



static int seq_release_net(struct inode *ino, struct file *f)

{

	struct seq_file *seq = f->private_data;



	put_net(seq_file_net(seq));

	seq_file_net_put_net(seq);

	seq_release_private(ino, f);

	return 0;

}
@@ -87,7 +99,8 @@ int bpf_iter_init_seq_net(void *priv_data, struct bpf_iter_aux_info *aux) 
#ifdef CONFIG_NET_NS

	struct seq_net_private *p = priv_data;



	p->net = get_net(current->nsproxy->net_ns);

	p->net = get_net_track(current->nsproxy->net_ns, &p->ns_tracker,

			       GFP_KERNEL);

#endif

	return 0;

}
@@ -97,7 +110,7 @@ void bpf_iter_fini_seq_net(void *priv_data) 
#ifdef CONFIG_NET_NS

	struct seq_net_private *p = priv_data;



	put_net(p->net);

	put_net_track(p->net, &p->ns_tracker);

#endif

}

include/linux/seq_file_net.h

+2 −1
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ extern struct net init_net; 
struct seq_net_private {

#ifdef CONFIG_NET_NS

	struct net	*net;

	netns_tracker	ns_tracker;

#endif

};