[mirror_ubuntu-artful-kernel.git] / net / batman-adv / debugfs.c

/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */

#include "main.h"

#include <linux/debugfs.h>

#include "debugfs.h"
#include "translation-table.h"
#include "originator.h"
#include "hard-interface.h"
#include "gateway_common.h"
#include "gateway_client.h"
#include "soft-interface.h"
#include "vis.h"
#include "icmp_socket.h"
#include "bridge_loop_avoidance.h"
#include "distributed-arp-table.h"
#include "network-coding.h"

static struct dentry *batadv_debugfs;

#ifdef CONFIG_BATMAN_ADV_DEBUG
#define BATADV_LOG_BUFF_MASK (batadv_log_buff_len - 1)

static const int batadv_log_buff_len = BATADV_LOG_BUF_LEN;

static char *batadv_log_char_addr(struct batadv_priv_debug_log *debug_log,
				  size_t idx)
{
	return &debug_log->log_buff[idx & BATADV_LOG_BUFF_MASK];
}

static void batadv_emit_log_char(struct batadv_priv_debug_log *debug_log,
				 char c)
{
	char *char_addr;

	char_addr = batadv_log_char_addr(debug_log, debug_log->log_end);
	*char_addr = c;
	debug_log->log_end++;

	if (debug_log->log_end - debug_log->log_start > batadv_log_buff_len)
		debug_log->log_start = debug_log->log_end - batadv_log_buff_len;
}

__printf(2, 3)
static int batadv_fdebug_log(struct batadv_priv_debug_log *debug_log,
			     const char *fmt, ...)
{
	va_list args;
	static char debug_log_buf[256];
	char *p;

	if (!debug_log)
		return 0;

	spin_lock_bh(&debug_log->lock);
	va_start(args, fmt);
	vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args);
	va_end(args);

	for (p = debug_log_buf; *p != 0; p++)
		batadv_emit_log_char(debug_log, *p);

	spin_unlock_bh(&debug_log->lock);

	wake_up(&debug_log->queue_wait);

	return 0;
}

int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
{
	va_list args;
	char tmp_log_buf[256];

	va_start(args, fmt);
	vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
	batadv_fdebug_log(bat_priv->debug_log, "[%10u] %s",
			  jiffies_to_msecs(jiffies), tmp_log_buf);
	va_end(args);

	return 0;
}

static int batadv_log_open(struct inode *inode, struct file *file)
{
	if (!try_module_get(THIS_MODULE))
		return -EBUSY;

	nonseekable_open(inode, file);
	file->private_data = inode->i_private;
	return 0;
}

static int batadv_log_release(struct inode *inode, struct file *file)
{
	module_put(THIS_MODULE);
	return 0;
}

static int batadv_log_empty(struct batadv_priv_debug_log *debug_log)
{
	return !(debug_log->log_start - debug_log->log_end);
}

static ssize_t batadv_log_read(struct file *file, char __user *buf,
			       size_t count, loff_t *ppos)
{
	struct batadv_priv *bat_priv = file->private_data;
	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
	int error, i = 0;
	char *char_addr;
	char c;

	if ((file->f_flags & O_NONBLOCK) && batadv_log_empty(debug_log))
		return -EAGAIN;

	if (!buf)
		return -EINVAL;

	if (count == 0)
		return 0;

	if (!access_ok(VERIFY_WRITE, buf, count))
		return -EFAULT;

	error = wait_event_interruptible(debug_log->queue_wait,
					 (!batadv_log_empty(debug_log)));

	if (error)
		return error;

	spin_lock_bh(&debug_log->lock);

	while ((!error) && (i < count) &&
	       (debug_log->log_start != debug_log->log_end)) {
		char_addr = batadv_log_char_addr(debug_log,
						 debug_log->log_start);
		c = *char_addr;

		debug_log->log_start++;

		spin_unlock_bh(&debug_log->lock);

		error = __put_user(c, buf);

		spin_lock_bh(&debug_log->lock);

		buf++;
		i++;
	}

	spin_unlock_bh(&debug_log->lock);

	if (!error)
		return i;

	return error;
}

static unsigned int batadv_log_poll(struct file *file, poll_table *wait)
{
	struct batadv_priv *bat_priv = file->private_data;
	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;

	poll_wait(file, &debug_log->queue_wait, wait);

	if (!batadv_log_empty(debug_log))
		return POLLIN | POLLRDNORM;

	return 0;
}

static const struct file_operations batadv_log_fops = {
	.open           = batadv_log_open,
	.release        = batadv_log_release,
	.read           = batadv_log_read,
	.poll           = batadv_log_poll,
	.llseek         = no_llseek,
};

static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
{
	struct dentry *d;

	if (!bat_priv->debug_dir)
		goto err;

	bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC);
	if (!bat_priv->debug_log)
		goto err;

	spin_lock_init(&bat_priv->debug_log->lock);
	init_waitqueue_head(&bat_priv->debug_log->queue_wait);

	d = debugfs_create_file("log", S_IFREG | S_IRUSR,
				bat_priv->debug_dir, bat_priv,
				&batadv_log_fops);
	if (!d)
		goto err;

	return 0;

err:
	return -ENOMEM;
}

static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
{
	kfree(bat_priv->debug_log);
	bat_priv->debug_log = NULL;
}
#else /* CONFIG_BATMAN_ADV_DEBUG */
static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
{
	return 0;
}

static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
{
	return;
}
#endif

static int batadv_algorithms_open(struct inode *inode, struct file *file)
{
	return single_open(file, batadv_algo_seq_print_text, NULL);
}

static int batadv_originators_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_orig_seq_print_text, net_dev);
}

static int batadv_gateways_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_gw_client_seq_print_text, net_dev);
}

static int batadv_transtable_global_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_tt_global_seq_print_text, net_dev);
}

#ifdef CONFIG_BATMAN_ADV_BLA
static int batadv_bla_claim_table_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_bla_claim_table_seq_print_text,
			   net_dev);
}

static int batadv_bla_backbone_table_open(struct inode *inode,
					  struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_bla_backbone_table_seq_print_text,
			   net_dev);
}

#endif

#ifdef CONFIG_BATMAN_ADV_DAT
/**
 * batadv_dat_cache_open - Prepare file handler for reads from dat_chache
 * @inode: inode which was opened
 * @file: file handle to be initialized
 */
static int batadv_dat_cache_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_dat_cache_seq_print_text, net_dev);
}
#endif

static int batadv_transtable_local_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_tt_local_seq_print_text, net_dev);
}

static int batadv_vis_data_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_vis_seq_print_text, net_dev);
}

struct batadv_debuginfo {
	struct attribute attr;
	const struct file_operations fops;
};

#ifdef CONFIG_BATMAN_ADV_NC
static int batadv_nc_nodes_open(struct inode *inode, struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
}
#endif

#define BATADV_DEBUGINFO(_name, _mode, _open)		\
struct batadv_debuginfo batadv_debuginfo_##_name = {	\
	.attr = { .name = __stringify(_name),		\
		  .mode = _mode, },			\
	.fops = { .owner = THIS_MODULE,			\
		  .open = _open,			\
		  .read	= seq_read,			\
		  .llseek = seq_lseek,			\
		  .release = single_release,		\
		}					\
};

/* the following attributes are general and therefore they will be directly
 * placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs
 */
static BATADV_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open);

static struct batadv_debuginfo *batadv_general_debuginfos[] = {
	&batadv_debuginfo_routing_algos,
	NULL,
};

/* The following attributes are per soft interface */
static BATADV_DEBUGINFO(originators, S_IRUGO, batadv_originators_open);
static BATADV_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open);
static BATADV_DEBUGINFO(transtable_global, S_IRUGO,
			batadv_transtable_global_open);
#ifdef CONFIG_BATMAN_ADV_BLA
static BATADV_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open);
static BATADV_DEBUGINFO(bla_backbone_table, S_IRUGO,
			batadv_bla_backbone_table_open);
#endif
#ifdef CONFIG_BATMAN_ADV_DAT
static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
#endif
static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
			batadv_transtable_local_open);
static BATADV_DEBUGINFO(vis_data, S_IRUGO, batadv_vis_data_open);
#ifdef CONFIG_BATMAN_ADV_NC
static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
#endif

static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
	&batadv_debuginfo_originators,
	&batadv_debuginfo_gateways,
	&batadv_debuginfo_transtable_global,
#ifdef CONFIG_BATMAN_ADV_BLA
	&batadv_debuginfo_bla_claim_table,
	&batadv_debuginfo_bla_backbone_table,
#endif
#ifdef CONFIG_BATMAN_ADV_DAT
	&batadv_debuginfo_dat_cache,
#endif
	&batadv_debuginfo_transtable_local,
	&batadv_debuginfo_vis_data,
#ifdef CONFIG_BATMAN_ADV_NC
	&batadv_debuginfo_nc_nodes,
#endif
	NULL,
};

void batadv_debugfs_init(void)
{
	struct batadv_debuginfo **bat_debug;
	struct dentry *file;

	batadv_debugfs = debugfs_create_dir(BATADV_DEBUGFS_SUBDIR, NULL);
	if (batadv_debugfs == ERR_PTR(-ENODEV))
		batadv_debugfs = NULL;

	if (!batadv_debugfs)
		goto err;

	for (bat_debug = batadv_general_debuginfos; *bat_debug; ++bat_debug) {
		file = debugfs_create_file(((*bat_debug)->attr).name,
					   S_IFREG | ((*bat_debug)->attr).mode,
					   batadv_debugfs, NULL,
					   &(*bat_debug)->fops);
		if (!file) {
			pr_err("Can't add general debugfs file: %s\n",
			       ((*bat_debug)->attr).name);
			goto err;
		}
	}

	return;
err:
	debugfs_remove_recursive(batadv_debugfs);
}

void batadv_debugfs_destroy(void)
{
	debugfs_remove_recursive(batadv_debugfs);
	batadv_debugfs = NULL;
}

int batadv_debugfs_add_meshif(struct net_device *dev)
{
	struct batadv_priv *bat_priv = netdev_priv(dev);
	struct batadv_debuginfo **bat_debug;
	struct dentry *file;

	if (!batadv_debugfs)
		goto out;

	bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs);
	if (!bat_priv->debug_dir)
		goto out;

	if (batadv_socket_setup(bat_priv) < 0)
		goto rem_attr;

	if (batadv_debug_log_setup(bat_priv) < 0)
		goto rem_attr;

	for (bat_debug = batadv_mesh_debuginfos; *bat_debug; ++bat_debug) {
		file = debugfs_create_file(((*bat_debug)->attr).name,
					   S_IFREG | ((*bat_debug)->attr).mode,
					   bat_priv->debug_dir,
					   dev, &(*bat_debug)->fops);
		if (!file) {
			batadv_err(dev, "Can't add debugfs file: %s/%s\n",
				   dev->name, ((*bat_debug)->attr).name);
			goto rem_attr;
		}
	}

	if (batadv_nc_init_debugfs(bat_priv) < 0)
		goto rem_attr;

	return 0;
rem_attr:
	debugfs_remove_recursive(bat_priv->debug_dir);
	bat_priv->debug_dir = NULL;
out:
#ifdef CONFIG_DEBUG_FS
	return -ENOMEM;
#else
	return 0;
#endif /* CONFIG_DEBUG_FS */
}

void batadv_debugfs_del_meshif(struct net_device *dev)
{
	struct batadv_priv *bat_priv = netdev_priv(dev);

	batadv_debug_log_cleanup(bat_priv);

	if (batadv_debugfs) {
		debugfs_remove_recursive(bat_priv->debug_dir);
		bat_priv->debug_dir = NULL;
	}
}
Commit	Line	Data
	1	/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors:
	2	*
	3	* Marek Lindner
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of version 2 of the GNU General Public
	7	* License as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but
	10	* WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	17	* 02110-1301, USA
	18	*/
	19
	20	#include "main.h"
	21
	22	#include <linux/debugfs.h>
	23
	24	#include "debugfs.h"
	25	#include "translation-table.h"
	26	#include "originator.h"
	27	#include "hard-interface.h"
	28	#include "gateway_common.h"
	29	#include "gateway_client.h"
	30	#include "soft-interface.h"
	31	#include "vis.h"
	32	#include "icmp_socket.h"
	33	#include "bridge_loop_avoidance.h"
	34	#include "distributed-arp-table.h"
	35	#include "network-coding.h"
	36
	37	static struct dentry *batadv_debugfs;
	38
	39	#ifdef CONFIG_BATMAN_ADV_DEBUG
	40	#define BATADV_LOG_BUFF_MASK (batadv_log_buff_len - 1)
	41
	42	static const int batadv_log_buff_len = BATADV_LOG_BUF_LEN;
	43
	44	static char batadv_log_char_addr(struct batadv_priv_debug_log debug_log,
	45	size_t idx)
	46	{
	47	return &debug_log->log_buff[idx & BATADV_LOG_BUFF_MASK];
	48	}
	49
	50	static void batadv_emit_log_char(struct batadv_priv_debug_log *debug_log,
	51	char c)
	52	{
	53	char *char_addr;
	54
	55	char_addr = batadv_log_char_addr(debug_log, debug_log->log_end);
	56	*char_addr = c;
	57	debug_log->log_end++;
	58
	59	if (debug_log->log_end - debug_log->log_start > batadv_log_buff_len)
	60	debug_log->log_start = debug_log->log_end - batadv_log_buff_len;
	61	}
	62
	63	__printf(2, 3)
	64	static int batadv_fdebug_log(struct batadv_priv_debug_log *debug_log,
	65	const char *fmt, ...)
	66	{
	67	va_list args;
	68	static char debug_log_buf[256];
	69	char *p;
	70
	71	if (!debug_log)
	72	return 0;
	73
	74	spin_lock_bh(&debug_log->lock);
	75	va_start(args, fmt);
	76	vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args);
	77	va_end(args);
	78
	79	for (p = debug_log_buf; *p != 0; p++)
	80	batadv_emit_log_char(debug_log, *p);
	81
	82	spin_unlock_bh(&debug_log->lock);
	83
	84	wake_up(&debug_log->queue_wait);
	85
	86	return 0;
	87	}
	88
	89	int batadv_debug_log(struct batadv_priv bat_priv, const char fmt, ...)
	90	{
	91	va_list args;
	92	char tmp_log_buf[256];
	93
	94	va_start(args, fmt);
	95	vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
	96	batadv_fdebug_log(bat_priv->debug_log, "[%10u] %s",
	97	jiffies_to_msecs(jiffies), tmp_log_buf);
	98	va_end(args);
	99
	100	return 0;
	101	}
	102
	103	static int batadv_log_open(struct inode inode, struct file file)
	104	{
	105	if (!try_module_get(THIS_MODULE))
	106	return -EBUSY;
	107
	108	nonseekable_open(inode, file);
	109	file->private_data = inode->i_private;
	110	return 0;
	111	}
	112
	113	static int batadv_log_release(struct inode inode, struct file file)
	114	{
	115	module_put(THIS_MODULE);
	116	return 0;
	117	}
	118
	119	static int batadv_log_empty(struct batadv_priv_debug_log *debug_log)
	120	{
	121	return !(debug_log->log_start - debug_log->log_end);
	122	}
	123
	124	static ssize_t batadv_log_read(struct file file, char __user buf,
	125	size_t count, loff_t *ppos)
	126	{
	127	struct batadv_priv *bat_priv = file->private_data;
	128	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
	129	int error, i = 0;
	130	char *char_addr;
	131	char c;
	132
	133	if ((file->f_flags & O_NONBLOCK) && batadv_log_empty(debug_log))
	134	return -EAGAIN;
	135
	136	if (!buf)
	137	return -EINVAL;
	138
	139	if (count == 0)
	140	return 0;
	141
	142	if (!access_ok(VERIFY_WRITE, buf, count))
	143	return -EFAULT;
	144
	145	error = wait_event_interruptible(debug_log->queue_wait,
	146	(!batadv_log_empty(debug_log)));
	147
	148	if (error)
	149	return error;
	150
	151	spin_lock_bh(&debug_log->lock);
	152
	153	while ((!error) && (i < count) &&
	154	(debug_log->log_start != debug_log->log_end)) {
	155	char_addr = batadv_log_char_addr(debug_log,
	156	debug_log->log_start);
	157	c = *char_addr;
	158
	159	debug_log->log_start++;
	160
	161	spin_unlock_bh(&debug_log->lock);
	162
	163	error = __put_user(c, buf);
	164
	165	spin_lock_bh(&debug_log->lock);
	166
	167	buf++;
	168	i++;
	169	}
	170
	171	spin_unlock_bh(&debug_log->lock);
	172
	173	if (!error)
	174	return i;
	175
	176	return error;
	177	}
	178
	179	static unsigned int batadv_log_poll(struct file file, poll_table wait)
	180	{
	181	struct batadv_priv *bat_priv = file->private_data;
	182	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
	183
	184	poll_wait(file, &debug_log->queue_wait, wait);
	185
	186	if (!batadv_log_empty(debug_log))
	187	return POLLIN \| POLLRDNORM;
	188
	189	return 0;
	190	}
	191
	192	static const struct file_operations batadv_log_fops = {
	193	.open = batadv_log_open,
	194	.release = batadv_log_release,
	195	.read = batadv_log_read,
	196	.poll = batadv_log_poll,
	197	.llseek = no_llseek,
	198	};
	199
	200	static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
	201	{
	202	struct dentry *d;
	203
	204	if (!bat_priv->debug_dir)
	205	goto err;
	206
	207	bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC);
	208	if (!bat_priv->debug_log)
	209	goto err;
	210
	211	spin_lock_init(&bat_priv->debug_log->lock);
	212	init_waitqueue_head(&bat_priv->debug_log->queue_wait);
	213
	214	d = debugfs_create_file("log", S_IFREG \| S_IRUSR,
	215	bat_priv->debug_dir, bat_priv,
	216	&batadv_log_fops);
	217	if (!d)
	218	goto err;
	219
	220	return 0;
	221
	222	err:
	223	return -ENOMEM;
	224	}
	225
	226	static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
	227	{
	228	kfree(bat_priv->debug_log);
	229	bat_priv->debug_log = NULL;
	230	}
	231	#else /* CONFIG_BATMAN_ADV_DEBUG */
	232	static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
	233	{
	234	return 0;
	235	}
	236
	237	static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
	238	{
	239	return;
	240	}
	241	#endif
	242
	243	static int batadv_algorithms_open(struct inode inode, struct file file)
	244	{
	245	return single_open(file, batadv_algo_seq_print_text, NULL);
	246	}
	247
	248	static int batadv_originators_open(struct inode inode, struct file file)
	249	{
	250	struct net_device net_dev = (struct net_device )inode->i_private;
	251	return single_open(file, batadv_orig_seq_print_text, net_dev);
	252	}
	253
	254	static int batadv_gateways_open(struct inode inode, struct file file)
	255	{
	256	struct net_device net_dev = (struct net_device )inode->i_private;
	257	return single_open(file, batadv_gw_client_seq_print_text, net_dev);
	258	}
	259
	260	static int batadv_transtable_global_open(struct inode inode, struct file file)
	261	{
	262	struct net_device net_dev = (struct net_device )inode->i_private;
	263	return single_open(file, batadv_tt_global_seq_print_text, net_dev);
	264	}
	265
	266	#ifdef CONFIG_BATMAN_ADV_BLA
	267	static int batadv_bla_claim_table_open(struct inode inode, struct file file)
	268	{
	269	struct net_device net_dev = (struct net_device )inode->i_private;
	270	return single_open(file, batadv_bla_claim_table_seq_print_text,
	271	net_dev);
	272	}
	273
	274	static int batadv_bla_backbone_table_open(struct inode *inode,
	275	struct file *file)
	276	{
	277	struct net_device net_dev = (struct net_device )inode->i_private;
	278	return single_open(file, batadv_bla_backbone_table_seq_print_text,
	279	net_dev);
	280	}
	281
	282	#endif
	283
	284	#ifdef CONFIG_BATMAN_ADV_DAT
	285	/**
	286	* batadv_dat_cache_open - Prepare file handler for reads from dat_chache
	287	* @inode: inode which was opened
	288	* @file: file handle to be initialized
	289	*/
	290	static int batadv_dat_cache_open(struct inode inode, struct file file)
	291	{
	292	struct net_device net_dev = (struct net_device )inode->i_private;
	293	return single_open(file, batadv_dat_cache_seq_print_text, net_dev);
	294	}
	295	#endif
	296
	297	static int batadv_transtable_local_open(struct inode inode, struct file file)
	298	{
	299	struct net_device net_dev = (struct net_device )inode->i_private;
	300	return single_open(file, batadv_tt_local_seq_print_text, net_dev);
	301	}
	302
	303	static int batadv_vis_data_open(struct inode inode, struct file file)
	304	{
	305	struct net_device net_dev = (struct net_device )inode->i_private;
	306	return single_open(file, batadv_vis_seq_print_text, net_dev);
	307	}
	308
	309	struct batadv_debuginfo {
	310	struct attribute attr;
	311	const struct file_operations fops;
	312	};
	313
	314	#ifdef CONFIG_BATMAN_ADV_NC
	315	static int batadv_nc_nodes_open(struct inode inode, struct file file)
	316	{
	317	struct net_device net_dev = (struct net_device )inode->i_private;
	318	return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
	319	}
	320	#endif
	321
	322	#define BATADV_DEBUGINFO(_name, _mode, _open) \
	323	struct batadv_debuginfo batadv_debuginfo_##_name = { \
	324	.attr = { .name = __stringify(_name), \
	325	.mode = _mode, }, \
	326	.fops = { .owner = THIS_MODULE, \
	327	.open = _open, \
	328	.read = seq_read, \
	329	.llseek = seq_lseek, \
	330	.release = single_release, \
	331	} \
	332	};
	333
	334	/* the following attributes are general and therefore they will be directly
	335	* placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs
	336	*/
	337	static BATADV_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open);
	338
	339	static struct batadv_debuginfo *batadv_general_debuginfos[] = {
	340	&batadv_debuginfo_routing_algos,
	341	NULL,
	342	};
	343
	344	/* The following attributes are per soft interface */
	345	static BATADV_DEBUGINFO(originators, S_IRUGO, batadv_originators_open);
	346	static BATADV_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open);
	347	static BATADV_DEBUGINFO(transtable_global, S_IRUGO,
	348	batadv_transtable_global_open);
	349	#ifdef CONFIG_BATMAN_ADV_BLA
	350	static BATADV_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open);
	351	static BATADV_DEBUGINFO(bla_backbone_table, S_IRUGO,
	352	batadv_bla_backbone_table_open);
	353	#endif
	354	#ifdef CONFIG_BATMAN_ADV_DAT
	355	static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
	356	#endif
	357	static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
	358	batadv_transtable_local_open);
	359	static BATADV_DEBUGINFO(vis_data, S_IRUGO, batadv_vis_data_open);
	360	#ifdef CONFIG_BATMAN_ADV_NC
	361	static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
	362	#endif
	363
	364	static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
	365	&batadv_debuginfo_originators,
	366	&batadv_debuginfo_gateways,
	367	&batadv_debuginfo_transtable_global,
	368	#ifdef CONFIG_BATMAN_ADV_BLA
	369	&batadv_debuginfo_bla_claim_table,
	370	&batadv_debuginfo_bla_backbone_table,
	371	#endif
	372	#ifdef CONFIG_BATMAN_ADV_DAT
	373	&batadv_debuginfo_dat_cache,
	374	#endif
	375	&batadv_debuginfo_transtable_local,
	376	&batadv_debuginfo_vis_data,
	377	#ifdef CONFIG_BATMAN_ADV_NC
	378	&batadv_debuginfo_nc_nodes,
	379	#endif
	380	NULL,
	381	};
	382
	383	void batadv_debugfs_init(void)
	384	{
	385	struct batadv_debuginfo **bat_debug;
	386	struct dentry *file;
	387
	388	batadv_debugfs = debugfs_create_dir(BATADV_DEBUGFS_SUBDIR, NULL);
	389	if (batadv_debugfs == ERR_PTR(-ENODEV))
	390	batadv_debugfs = NULL;
	391
	392	if (!batadv_debugfs)
	393	goto err;
	394
	395	for (bat_debug = batadv_general_debuginfos; *bat_debug; ++bat_debug) {
	396	file = debugfs_create_file(((*bat_debug)->attr).name,
	397	S_IFREG \| ((*bat_debug)->attr).mode,
	398	batadv_debugfs, NULL,
	399	&(*bat_debug)->fops);
	400	if (!file) {
	401	pr_err("Can't add general debugfs file: %s\n",
	402	((*bat_debug)->attr).name);
	403	goto err;
	404	}
	405	}
	406
	407	return;
	408	err:
	409	debugfs_remove_recursive(batadv_debugfs);
	410	}
	411
	412	void batadv_debugfs_destroy(void)
	413	{
	414	debugfs_remove_recursive(batadv_debugfs);
	415	batadv_debugfs = NULL;
	416	}
	417
	418	int batadv_debugfs_add_meshif(struct net_device *dev)
	419	{
	420	struct batadv_priv *bat_priv = netdev_priv(dev);
	421	struct batadv_debuginfo **bat_debug;
	422	struct dentry *file;
	423
	424	if (!batadv_debugfs)
	425	goto out;
	426
	427	bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs);
	428	if (!bat_priv->debug_dir)
	429	goto out;
	430
	431	if (batadv_socket_setup(bat_priv) < 0)
	432	goto rem_attr;
	433
	434	if (batadv_debug_log_setup(bat_priv) < 0)
	435	goto rem_attr;
	436
	437	for (bat_debug = batadv_mesh_debuginfos; *bat_debug; ++bat_debug) {
	438	file = debugfs_create_file(((*bat_debug)->attr).name,
	439	S_IFREG \| ((*bat_debug)->attr).mode,
	440	bat_priv->debug_dir,
	441	dev, &(*bat_debug)->fops);
	442	if (!file) {
	443	batadv_err(dev, "Can't add debugfs file: %s/%s\n",
	444	dev->name, ((*bat_debug)->attr).name);
	445	goto rem_attr;
	446	}
	447	}
	448
	449	if (batadv_nc_init_debugfs(bat_priv) < 0)
	450	goto rem_attr;
	451
	452	return 0;
	453	rem_attr:
	454	debugfs_remove_recursive(bat_priv->debug_dir);
	455	bat_priv->debug_dir = NULL;
	456	out:
	457	#ifdef CONFIG_DEBUG_FS
	458	return -ENOMEM;
	459	#else
	460	return 0;
	461	#endif /* CONFIG_DEBUG_FS */
	462	}
	463
	464	void batadv_debugfs_del_meshif(struct net_device *dev)
	465	{
	466	struct batadv_priv *bat_priv = netdev_priv(dev);
	467
	468	batadv_debug_log_cleanup(bat_priv);
	469
	470	if (batadv_debugfs) {
	471	debugfs_remove_recursive(bat_priv->debug_dir);
	472	bat_priv->debug_dir = NULL;
	473	}
	474	}