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Commit c1dc13e9 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont Committed by David S. Miller
Browse files

Phonet: sockets list through proc_fs 



This provides a list of sockets with their Phonet bind addresses and
some socket debug informations through /proc/net/phonet.

Signed-off-by: default avatarRémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e8834a63

include/net/phonet/pn_dev.h

+2 −0
Original line number Diff line number Diff line
@@ -49,4 +49,6 @@ void phonet_address_notify(int event, struct net_device *dev, u8 addr); 


#define PN_NO_ADDR	0xff



extern const struct file_operations pn_sock_seq_fops;



#endif

net/phonet/pn_dev.c

+7 −0
Original line number Diff line number Diff line
@@ -218,6 +218,11 @@ static int phonet_init_net(struct net *net) 
	if (!pnn)

		return -ENOMEM;



	if (!proc_net_fops_create(net, "phonet", 0, &pn_sock_seq_fops)) {

		kfree(pnn);

		return -ENOMEM;

	}



	INIT_LIST_HEAD(&pnn->pndevs.list);

	spin_lock_init(&pnn->pndevs.lock);

	net_assign_generic(net, phonet_net_id, pnn);
@@ -233,6 +238,8 @@ static void phonet_exit_net(struct net *net) 
	for_each_netdev(net, dev)

		phonet_device_destroy(dev);

	rtnl_unlock();



	proc_net_remove(net, "phonet");

	kfree(pnn);

}

net/phonet/socket.c

+96 −0
Original line number Diff line number Diff line
@@ -412,3 +412,99 @@ int pn_sock_get_port(struct sock *sk, unsigned short sport) 
	return 0;

}

EXPORT_SYMBOL(pn_sock_get_port);



static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos)

{

	struct net *net = seq_file_net(seq);

	struct hlist_node *node;

	struct sock *sknode;



	sk_for_each(sknode, node, &pnsocks.hlist) {

		if (!net_eq(net, sock_net(sknode)))

			continue;

		if (!pos)

			return sknode;

		pos--;

	}

	return NULL;

}



static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk)

{

	struct net *net = seq_file_net(seq);



	do

		sk = sk_next(sk);

	while (sk && !net_eq(net, sock_net(sk)));



	return sk;

}



static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos)

	__acquires(pnsocks.lock)

{

	spin_lock_bh(&pnsocks.lock);

	return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;

}



static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos)

{

	struct sock *sk;



	if (v == SEQ_START_TOKEN)

		sk = pn_sock_get_idx(seq, 0);

	else

		sk = pn_sock_get_next(seq, v);

	(*pos)++;

	return sk;

}



static void pn_sock_seq_stop(struct seq_file *seq, void *v)

	__releases(pnsocks.lock)

{

	spin_unlock_bh(&pnsocks.lock);

}



static int pn_sock_seq_show(struct seq_file *seq, void *v)

{

	int len;



	if (v == SEQ_START_TOKEN)

		seq_printf(seq, "%s%n", "pt  loc  rem rs st tx_queue rx_queue "

			"  uid inode ref pointer drops", &len);

	else {

		struct sock *sk = v;

		struct pn_sock *pn = pn_sk(sk);



		seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "

			"%d %p %d%n",

			sk->sk_protocol, pn->sobject, 0, pn->resource,

			sk->sk_state,

			sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),

			sock_i_uid(sk), sock_i_ino(sk),

			atomic_read(&sk->sk_refcnt), sk,

			atomic_read(&sk->sk_drops), &len);

	}

	seq_printf(seq, "%*s\n", 127 - len, "");

	return 0;

}



static const struct seq_operations pn_sock_seq_ops = {

	.start = pn_sock_seq_start,

	.next = pn_sock_seq_next,

	.stop = pn_sock_seq_stop,

	.show = pn_sock_seq_show,

};



static int pn_sock_open(struct inode *inode, struct file *file)

{

	return seq_open(file, &pn_sock_seq_ops);

}



const struct file_operations pn_sock_seq_fops = {

	.owner = THIS_MODULE,

	.open = pn_sock_open,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = seq_release,

};