[linux.git] / net / llc / llc_proc.c

/*
 * proc_llc.c - proc interface for LLC
 *
 * Copyright (c) 2001 by Jay Schulist <[email protected]>
 *		 2002-2003 by Arnaldo Carvalho de Melo <[email protected]>
 *
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/errno.h>
#include <linux/seq_file.h>
#include <net/sock.h>
#include <net/llc.h>
#include <net/llc_c_ac.h>
#include <net/llc_c_ev.h>
#include <net/llc_c_st.h>
#include <net/llc_conn.h>

static void llc_ui_format_mac(struct seq_file *seq, unsigned char *mac)
{
	seq_printf(seq, "%02X:%02X:%02X:%02X:%02X:%02X",
		   mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}

static struct sock *llc_get_sk_idx(loff_t pos)
{
	struct list_head *sap_entry;
	struct llc_sap *sap;
	struct hlist_node *node;
	struct sock *sk = NULL;

	list_for_each(sap_entry, &llc_sap_list) {
		sap = list_entry(sap_entry, struct llc_sap, node);

		read_lock_bh(&sap->sk_list.lock);
		sk_for_each(sk, node, &sap->sk_list.list) {
			if (!pos)
				goto found;
			--pos;
		}
		read_unlock_bh(&sap->sk_list.lock);
	}
	sk = NULL;
found:
	return sk;
}

static void *llc_seq_start(struct seq_file *seq, loff_t *pos)
{
	loff_t l = *pos;

	read_lock_bh(&llc_sap_list_lock);
	return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN;
}

static void *llc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct sock* sk, *next;
	struct llc_sock *llc;
	struct llc_sap *sap;

	++*pos;
	if (v == SEQ_START_TOKEN) {
		sk = llc_get_sk_idx(0);
		goto out;
	}
	sk = v;
	next = sk_next(sk);
	if (next) {
		sk = next;
		goto out;
	}
	llc = llc_sk(sk);
	sap = llc->sap;
	read_unlock_bh(&sap->sk_list.lock);
	sk = NULL;
	for (;;) {
		if (sap->node.next == &llc_sap_list)
			break;
		sap = list_entry(sap->node.next, struct llc_sap, node);
		read_lock_bh(&sap->sk_list.lock);
		if (!hlist_empty(&sap->sk_list.list)) {
			sk = sk_head(&sap->sk_list.list);
			break;
		}
		read_unlock_bh(&sap->sk_list.lock);
	}
out:
	return sk;
}

static void llc_seq_stop(struct seq_file *seq, void *v)
{
	if (v && v != SEQ_START_TOKEN) {
		struct sock *sk = v;
		struct llc_sock *llc = llc_sk(sk);
		struct llc_sap *sap = llc->sap;

		read_unlock_bh(&sap->sk_list.lock);
	}
	read_unlock_bh(&llc_sap_list_lock);
}

static int llc_seq_socket_show(struct seq_file *seq, void *v)
{
	struct sock* sk;
	struct llc_sock *llc;

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq, "SKt Mc local_mac_sap        remote_mac_sap   "
			      "    tx_queue rx_queue st uid link\n");
		goto out;
	}
	sk = v;
	llc = llc_sk(sk);

	/* FIXME: check if the address is multicast */
	seq_printf(seq, "%2X  %2X ", sk->sk_type, 0);

	if (llc->dev)
		llc_ui_format_mac(seq, llc->dev->dev_addr);
	else
		seq_printf(seq, "00:00:00:00:00:00");
	seq_printf(seq, "@%02X ", llc->sap->laddr.lsap);
	llc_ui_format_mac(seq, llc->daddr.mac);
	seq_printf(seq, "@%02X %8d %8d %2d %3d %4d\n", llc->daddr.lsap,
		   atomic_read(&sk->sk_wmem_alloc),
		   atomic_read(&sk->sk_rmem_alloc) - llc->copied_seq,
		   sk->sk_state,
		   sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : -1,
		   llc->link);
out:
	return 0;
}

static char *llc_conn_state_names[] = {
	[LLC_CONN_STATE_ADM] =        "adm",
	[LLC_CONN_STATE_SETUP] =      "setup",
	[LLC_CONN_STATE_NORMAL] =     "normal",
	[LLC_CONN_STATE_BUSY] =       "busy",
	[LLC_CONN_STATE_REJ] =        "rej",
	[LLC_CONN_STATE_AWAIT] =      "await",
	[LLC_CONN_STATE_AWAIT_BUSY] = "await_busy",
	[LLC_CONN_STATE_AWAIT_REJ] =  "await_rej",
	[LLC_CONN_STATE_D_CONN]	=     "d_conn",
	[LLC_CONN_STATE_RESET] =      "reset",
	[LLC_CONN_STATE_ERROR] =      "error",
	[LLC_CONN_STATE_TEMP] =       "temp",
};

static int llc_seq_core_show(struct seq_file *seq, void *v)
{
	struct sock* sk;
	struct llc_sock *llc;

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq, "Connection list:\n"
			      "dsap state      retr txw rxw pf ff sf df rs cs "
			      "tack tpfc trs tbs blog busr\n");
		goto out;
	}
	sk = v;
	llc = llc_sk(sk);

	seq_printf(seq, " %02X  %-10s %3d  %3d %3d %2d %2d %2d %2d %2d %2d "
			"%4d %4d %3d %3d %4d %4d\n",
		   llc->daddr.lsap, llc_conn_state_names[llc->state],
		   llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag,
		   llc->s_flag, llc->data_flag, llc->remote_busy_flag,
		   llc->cause_flag, timer_pending(&llc->ack_timer.timer),
		   timer_pending(&llc->pf_cycle_timer.timer),
		   timer_pending(&llc->rej_sent_timer.timer),
		   timer_pending(&llc->busy_state_timer.timer),
		   !!sk->sk_backlog.tail, !!sock_owned_by_user(sk));
out:
	return 0;
}

static struct seq_operations llc_seq_socket_ops = {
	.start  = llc_seq_start,
	.next   = llc_seq_next,
	.stop   = llc_seq_stop,
	.show   = llc_seq_socket_show,
};

static struct seq_operations llc_seq_core_ops = {
	.start  = llc_seq_start,
	.next   = llc_seq_next,
	.stop   = llc_seq_stop,
	.show   = llc_seq_core_show,
};

static int llc_seq_socket_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &llc_seq_socket_ops);
}

static int llc_seq_core_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &llc_seq_core_ops);
}

static const struct file_operations llc_seq_socket_fops = {
	.owner		= THIS_MODULE,
	.open		= llc_seq_socket_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static const struct file_operations llc_seq_core_fops = {
	.owner		= THIS_MODULE,
	.open		= llc_seq_core_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static struct proc_dir_entry *llc_proc_dir;

int __init llc_proc_init(void)
{
	int rc = -ENOMEM;
	struct proc_dir_entry *p;

	llc_proc_dir = proc_mkdir("llc", proc_net);
	if (!llc_proc_dir)
		goto out;
	llc_proc_dir->owner = THIS_MODULE;

	p = create_proc_entry("socket", S_IRUGO, llc_proc_dir);
	if (!p)
		goto out_socket;

	p->proc_fops = &llc_seq_socket_fops;

	p = create_proc_entry("core", S_IRUGO, llc_proc_dir);
	if (!p)
		goto out_core;

	p->proc_fops = &llc_seq_core_fops;

	rc = 0;
out:
	return rc;
out_core:
	remove_proc_entry("socket", llc_proc_dir);
out_socket:
	remove_proc_entry("llc", proc_net);
	goto out;
}

void llc_proc_exit(void)
{
	remove_proc_entry("socket", llc_proc_dir);
	remove_proc_entry("core", llc_proc_dir);
	remove_proc_entry("llc", proc_net);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* proc_llc.c - proc interface for LLC
	3	*
	4	* Copyright (c) 2001 by Jay Schulist <[email protected]>
	5	* 2002-2003 by Arnaldo Carvalho de Melo <[email protected]>
	6	*
	7	* This program can be redistributed or modified under the terms of the
	8	* GNU General Public License as published by the Free Software Foundation.
	9	* This program is distributed without any warranty or implied warranty
	10	* of merchantability or fitness for a particular purpose.
	11	*
	12	* See the GNU General Public License for more details.
	13	*/
	14
1da177e4 LT	15	#include <linux/init.h>
	16	#include <linux/kernel.h>
	17	#include <linux/proc_fs.h>
	18	#include <linux/errno.h>
	19	#include <linux/seq_file.h>
	20	#include <net/sock.h>
	21	#include <net/llc.h>
	22	#include <net/llc_c_ac.h>
	23	#include <net/llc_c_ev.h>
	24	#include <net/llc_c_st.h>
	25	#include <net/llc_conn.h>
	26
	27	static void llc_ui_format_mac(struct seq_file seq, unsigned char mac)
	28	{
	29	seq_printf(seq, "%02X:%02X:%02X:%02X:%02X:%02X",
	30	mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
	31	}
	32
	33	static struct sock *llc_get_sk_idx(loff_t pos)
	34	{
	35	struct list_head *sap_entry;
	36	struct llc_sap *sap;
	37	struct hlist_node *node;
	38	struct sock *sk = NULL;
	39
	40	list_for_each(sap_entry, &llc_sap_list) {
	41	sap = list_entry(sap_entry, struct llc_sap, node);
	42
	43	read_lock_bh(&sap->sk_list.lock);
	44	sk_for_each(sk, node, &sap->sk_list.list) {
	45	if (!pos)
	46	goto found;
	47	--pos;
	48	}
	49	read_unlock_bh(&sap->sk_list.lock);
	50	}
	51	sk = NULL;
	52	found:
	53	return sk;
	54	}
	55
	56	static void llc_seq_start(struct seq_file seq, loff_t *pos)
	57	{
	58	loff_t l = *pos;
	59
	60	read_lock_bh(&llc_sap_list_lock);
	61	return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN;
	62	}
	63
	64	static void llc_seq_next(struct seq_file seq, void v, loff_t pos)
	65	{
	66	struct sock* sk, *next;
	67	struct llc_sock *llc;
	68	struct llc_sap *sap;
	69
	70	++*pos;
	71	if (v == SEQ_START_TOKEN) {
	72	sk = llc_get_sk_idx(0);
	73	goto out;
	74	}
	75	sk = v;
	76	next = sk_next(sk);
	77	if (next) {
	78	sk = next;
79	goto out;
80	}
81	llc = llc_sk(sk);
82	sap = llc->sap;
83	read_unlock_bh(&sap->sk_list.lock);
84	sk = NULL;
85	for (;;) {
86	if (sap->node.next == &llc_sap_list)
87	break;
88	sap = list_entry(sap->node.next, struct llc_sap, node);
89	read_lock_bh(&sap->sk_list.lock);
90	if (!hlist_empty(&sap->sk_list.list)) {
91	sk = sk_head(&sap->sk_list.list);
92	break;
93	}
94	read_unlock_bh(&sap->sk_list.lock);
95	}
96	out:
97	return sk;
98	}
99
100	static void llc_seq_stop(struct seq_file seq, void v)
101	{
102	if (v && v != SEQ_START_TOKEN) {
103	struct sock *sk = v;
104	struct llc_sock *llc = llc_sk(sk);
105	struct llc_sap *sap = llc->sap;
106
107	read_unlock_bh(&sap->sk_list.lock);
108	}
109	read_unlock_bh(&llc_sap_list_lock);
110	}
111
112	static int llc_seq_socket_show(struct seq_file seq, void v)
113	{
114	struct sock* sk;
115	struct llc_sock *llc;
116
117	if (v == SEQ_START_TOKEN) {
118	seq_puts(seq, "SKt Mc local_mac_sap remote_mac_sap "
119	" tx_queue rx_queue st uid link\n");
120	goto out;
121	}
122	sk = v;
123	llc = llc_sk(sk);
124
125	/* FIXME: check if the address is multicast */
126	seq_printf(seq, "%2X %2X ", sk->sk_type, 0);
127
128	if (llc->dev)
129	llc_ui_format_mac(seq, llc->dev->dev_addr);
130	else
131	seq_printf(seq, "00:00:00:00:00:00");
132	seq_printf(seq, "@%02X ", llc->sap->laddr.lsap);
133	llc_ui_format_mac(seq, llc->daddr.mac);
134	seq_printf(seq, "@%02X %8d %8d %2d %3d %4d\n", llc->daddr.lsap,
135	atomic_read(&sk->sk_wmem_alloc),
8420e1b5	136	atomic_read(&sk->sk_rmem_alloc) - llc->copied_seq,
1da177e4 LT	137	sk->sk_state,
	138	sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : -1,
	139	llc->link);
	140	out:
	141	return 0;
	142	}
	143
	144	static char *llc_conn_state_names[] = {
d57b1869 YH	145	[LLC_CONN_STATE_ADM] = "adm",
d57b1869 YH	146	[LLC_CONN_STATE_SETUP] = "setup",
1da177e4	147	[LLC_CONN_STATE_NORMAL] = "normal",
d57b1869 YH	148	[LLC_CONN_STATE_BUSY] = "busy",
	149	[LLC_CONN_STATE_REJ] = "rej",
	150	[LLC_CONN_STATE_AWAIT] = "await",
1da177e4 LT	151	[LLC_CONN_STATE_AWAIT_BUSY] = "await_busy",
	152	[LLC_CONN_STATE_AWAIT_REJ] = "await_rej",
	153	[LLC_CONN_STATE_D_CONN] = "d_conn",
d57b1869 YH	154	[LLC_CONN_STATE_RESET] = "reset",
	155	[LLC_CONN_STATE_ERROR] = "error",
	156	[LLC_CONN_STATE_TEMP] = "temp",
1da177e4 LT	157	};
	158
	159	static int llc_seq_core_show(struct seq_file seq, void v)
	160	{
	161	struct sock* sk;
	162	struct llc_sock *llc;
	163
	164	if (v == SEQ_START_TOKEN) {
	165	seq_puts(seq, "Connection list:\n"
	166	"dsap state retr txw rxw pf ff sf df rs cs "
	167	"tack tpfc trs tbs blog busr\n");
	168	goto out;
	169	}
	170	sk = v;
	171	llc = llc_sk(sk);
	172
	173	seq_printf(seq, " %02X %-10s %3d %3d %3d %2d %2d %2d %2d %2d %2d "
	174	"%4d %4d %3d %3d %4d %4d\n",
	175	llc->daddr.lsap, llc_conn_state_names[llc->state],
	176	llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag,
	177	llc->s_flag, llc->data_flag, llc->remote_busy_flag,
	178	llc->cause_flag, timer_pending(&llc->ack_timer.timer),
	179	timer_pending(&llc->pf_cycle_timer.timer),
	180	timer_pending(&llc->rej_sent_timer.timer),
	181	timer_pending(&llc->busy_state_timer.timer),
	182	!!sk->sk_backlog.tail, !!sock_owned_by_user(sk));
	183	out:
	184	return 0;
	185	}
	186
	187	static struct seq_operations llc_seq_socket_ops = {
	188	.start = llc_seq_start,
	189	.next = llc_seq_next,
	190	.stop = llc_seq_stop,
	191	.show = llc_seq_socket_show,
	192	};
	193
	194	static struct seq_operations llc_seq_core_ops = {
	195	.start = llc_seq_start,
	196	.next = llc_seq_next,
	197	.stop = llc_seq_stop,
	198	.show = llc_seq_core_show,
	199	};
	200
	201	static int llc_seq_socket_open(struct inode inode, struct file file)
	202	{
	203	return seq_open(file, &llc_seq_socket_ops);
	204	}
	205
	206	static int llc_seq_core_open(struct inode inode, struct file file)
	207	{
	208	return seq_open(file, &llc_seq_core_ops);
	209	}
	210
da7071d7	211	static const struct file_operations llc_seq_socket_fops = {
1da177e4 LT	212	.owner = THIS_MODULE,
	213	.open = llc_seq_socket_open,
	214	.read = seq_read,
	215	.llseek = seq_lseek,
	216	.release = seq_release,
	217	};
	218
da7071d7	219	static const struct file_operations llc_seq_core_fops = {
1da177e4 LT	220	.owner = THIS_MODULE,
	221	.open = llc_seq_core_open,
	222	.read = seq_read,
	223	.llseek = seq_lseek,
	224	.release = seq_release,
	225	};
	226
	227	static struct proc_dir_entry *llc_proc_dir;
	228
	229	int __init llc_proc_init(void)
	230	{
	231	int rc = -ENOMEM;
	232	struct proc_dir_entry *p;
	233
	234	llc_proc_dir = proc_mkdir("llc", proc_net);
	235	if (!llc_proc_dir)
	236	goto out;
	237	llc_proc_dir->owner = THIS_MODULE;
	238
	239	p = create_proc_entry("socket", S_IRUGO, llc_proc_dir);
	240	if (!p)
	241	goto out_socket;
	242
	243	p->proc_fops = &llc_seq_socket_fops;
	244
	245	p = create_proc_entry("core", S_IRUGO, llc_proc_dir);
	246	if (!p)
	247	goto out_core;
	248
	249	p->proc_fops = &llc_seq_core_fops;
	250
	251	rc = 0;
	252	out:
	253	return rc;
	254	out_core:
	255	remove_proc_entry("socket", llc_proc_dir);
	256	out_socket:
	257	remove_proc_entry("llc", proc_net);
	258	goto out;
	259	}
	260
	261	void llc_proc_exit(void)
	262	{
	263	remove_proc_entry("socket", llc_proc_dir);
	264	remove_proc_entry("core", llc_proc_dir);
	265	remove_proc_entry("llc", proc_net);
	266	}