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

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
......@@ -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
......@@ -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);
}
......
......@@ -412,3 +412,99 @@ found:
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,
};
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