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

/*
 * Copyright (C) 2010-2012 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 "bat_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"

static struct dentry *bat_debugfs;

#ifdef CONFIG_BATMAN_ADV_DEBUG
#define LOG_BUFF_MASK (log_buff_len-1)
#define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])

static int log_buff_len = LOG_BUF_LEN;

static void emit_log_char(struct debug_log *debug_log, char c)
{
	LOG_BUFF(debug_log->log_end) = c;
	debug_log->log_end++;

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

__printf(2, 3)
static int fdebug_log(struct 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++)
		emit_log_char(debug_log, *p);

	spin_unlock_bh(&debug_log->lock);

	wake_up(&debug_log->queue_wait);

	return 0;
}

int debug_log(struct bat_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);
	fdebug_log(bat_priv->debug_log, "[%10u] %s",
		   jiffies_to_msecs(jiffies), tmp_log_buf);
	va_end(args);

	return 0;
}

static int log_open(struct inode *inode, struct file *file)
{
	nonseekable_open(inode, file);
	file->private_data = inode->i_private;
	inc_module_count();
	return 0;
}

static int log_release(struct inode *inode, struct file *file)
{
	dec_module_count();
	return 0;
}

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

	if ((file->f_flags & O_NONBLOCK) &&
	    !(debug_log->log_end - debug_log->log_start))
		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,
				(debug_log->log_start - debug_log->log_end));

	if (error)
		return error;

	spin_lock_bh(&debug_log->lock);

	while ((!error) && (i < count) &&
	       (debug_log->log_start != debug_log->log_end)) {
		c = LOG_BUFF(debug_log->log_start);

		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 log_poll(struct file *file, poll_table *wait)
{
	struct bat_priv *bat_priv = file->private_data;
	struct debug_log *debug_log = bat_priv->debug_log;

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

	if (debug_log->log_end - debug_log->log_start)
		return POLLIN | POLLRDNORM;

	return 0;
}

static const struct file_operations log_fops = {
	.open           = log_open,
	.release        = log_release,
	.read           = log_read,
	.poll           = log_poll,
	.llseek         = no_llseek,
};

static int debug_log_setup(struct bat_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, &log_fops);
	if (d)
		goto err;

	return 0;

err:
	return 1;
}

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

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

static int bat_algorithms_open(struct inode *inode, struct file *file)
{
	return single_open(file, bat_algo_seq_print_text, NULL);
}

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

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

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

#ifdef CONFIG_BATMAN_ADV_BLA
static int 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, bla_claim_table_seq_print_text, net_dev);
}
#endif

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

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

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

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

static BAT_DEBUGINFO(routing_algos, S_IRUGO, bat_algorithms_open);
static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
#ifdef CONFIG_BATMAN_ADV_BLA
static BAT_DEBUGINFO(bla_claim_table, S_IRUGO, bla_claim_table_open);
#endif
static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);

static struct bat_debuginfo *mesh_debuginfos[] = {
	&bat_debuginfo_originators,
	&bat_debuginfo_gateways,
	&bat_debuginfo_transtable_global,
#ifdef CONFIG_BATMAN_ADV_BLA
	&bat_debuginfo_bla_claim_table,
#endif
	&bat_debuginfo_transtable_local,
	&bat_debuginfo_vis_data,
	NULL,
};

void debugfs_init(void)
{
	struct bat_debuginfo *bat_debug;
	struct dentry *file;

	bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
	if (bat_debugfs == ERR_PTR(-ENODEV))
		bat_debugfs = NULL;

	if (!bat_debugfs)
		goto out;

	bat_debug = &bat_debuginfo_routing_algos;
	file = debugfs_create_file(bat_debug->attr.name,
				   S_IFREG | bat_debug->attr.mode,
				   bat_debugfs, NULL, &bat_debug->fops);
	if (!file)
		pr_err("Can't add debugfs file: %s\n", bat_debug->attr.name);

out:
	return;
}

void debugfs_destroy(void)
{
	if (bat_debugfs) {
		debugfs_remove_recursive(bat_debugfs);
		bat_debugfs = NULL;
	}
}

int debugfs_add_meshif(struct net_device *dev)
{
	struct bat_priv *bat_priv = netdev_priv(dev);
	struct bat_debuginfo **bat_debug;
	struct dentry *file;

	if (!bat_debugfs)
		goto out;

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

	bat_socket_setup(bat_priv);
	debug_log_setup(bat_priv);

	for (bat_debug = 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) {
			bat_err(dev, "Can't add debugfs file: %s/%s\n",
				dev->name, ((*bat_debug)->attr).name);
			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 debugfs_del_meshif(struct net_device *dev)
{
	struct bat_priv *bat_priv = netdev_priv(dev);

	debug_log_cleanup(bat_priv);

	if (bat_debugfs) {
		debugfs_remove_recursive(bat_priv->debug_dir);
		bat_priv->debug_dir = NULL;
	}
}
Commit	Line	Data
c6c8fea2	1	/*
567db7b0	2	* Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
c6c8fea2 SE	3	*
	4	* Marek Lindner
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of version 2 of the GNU General Public
	8	* License as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	18	* 02110-1301, USA
	19	*
	20	*/
	21
	22	#include "main.h"
	23
	24	#include <linux/debugfs.h>
	25
	26	#include "bat_debugfs.h"
	27	#include "translation-table.h"
	28	#include "originator.h"
	29	#include "hard-interface.h"
	30	#include "gateway_common.h"
	31	#include "gateway_client.h"
	32	#include "soft-interface.h"
	33	#include "vis.h"
	34	#include "icmp_socket.h"
9bf8e4d4	35	#include "bridge_loop_avoidance.h"
c6c8fea2 SE	36
	37	static struct dentry *bat_debugfs;
	38
	39	#ifdef CONFIG_BATMAN_ADV_DEBUG
	40	#define LOG_BUFF_MASK (log_buff_len-1)
	41	#define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])
	42
	43	static int log_buff_len = LOG_BUF_LEN;
	44
	45	static void emit_log_char(struct debug_log *debug_log, char c)
	46	{
	47	LOG_BUFF(debug_log->log_end) = c;
	48	debug_log->log_end++;
	49
	50	if (debug_log->log_end - debug_log->log_start > log_buff_len)
	51	debug_log->log_start = debug_log->log_end - log_buff_len;
	52	}
	53
d3a547be	54	__printf(2, 3)
747e4221	55	static int fdebug_log(struct debug_log debug_log, const char fmt, ...)
c6c8fea2	56	{
c6c8fea2 SE	57	va_list args;
	58	static char debug_log_buf[256];
	59	char *p;
	60
	61	if (!debug_log)
	62	return 0;
	63
	64	spin_lock_bh(&debug_log->lock);
	65	va_start(args, fmt);
1299bdaa	66	vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args);
c6c8fea2 SE	67	va_end(args);
	68
	69	for (p = debug_log_buf; *p != 0; p++)
	70	emit_log_char(debug_log, *p);
	71
	72	spin_unlock_bh(&debug_log->lock);
	73
	74	wake_up(&debug_log->queue_wait);
	75
	76	return 0;
	77	}
	78
747e4221	79	int debug_log(struct bat_priv bat_priv, const char fmt, ...)
c6c8fea2 SE	80	{
	81	va_list args;
	82	char tmp_log_buf[256];
	83
	84	va_start(args, fmt);
	85	vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
0b0094e0 ML	86	fdebug_log(bat_priv->debug_log, "[%10u] %s",
0b0094e0 ML	87	jiffies_to_msecs(jiffies), tmp_log_buf);
c6c8fea2 SE	88	va_end(args);
	89
	90	return 0;
	91	}
	92
	93	static int log_open(struct inode inode, struct file file)
	94	{
	95	nonseekable_open(inode, file);
	96	file->private_data = inode->i_private;
	97	inc_module_count();
	98	return 0;
	99	}
	100
	101	static int log_release(struct inode inode, struct file file)
	102	{
	103	dec_module_count();
	104	return 0;
	105	}
	106
	107	static ssize_t log_read(struct file file, char __user buf,
	108	size_t count, loff_t *ppos)
	109	{
	110	struct bat_priv *bat_priv = file->private_data;
	111	struct debug_log *debug_log = bat_priv->debug_log;
	112	int error, i = 0;
	113	char c;
	114
	115	if ((file->f_flags & O_NONBLOCK) &&
	116	!(debug_log->log_end - debug_log->log_start))
	117	return -EAGAIN;
	118
16f14b45	119	if (!buf)
c6c8fea2 SE	120	return -EINVAL;
	121
	122	if (count == 0)
	123	return 0;
	124
	125	if (!access_ok(VERIFY_WRITE, buf, count))
	126	return -EFAULT;
	127
	128	error = wait_event_interruptible(debug_log->queue_wait,
	129	(debug_log->log_start - debug_log->log_end));
	130
	131	if (error)
	132	return error;
	133
	134	spin_lock_bh(&debug_log->lock);
	135
	136	while ((!error) && (i < count) &&
	137	(debug_log->log_start != debug_log->log_end)) {
	138	c = LOG_BUFF(debug_log->log_start);
	139
	140	debug_log->log_start++;
	141
	142	spin_unlock_bh(&debug_log->lock);
	143
	144	error = __put_user(c, buf);
	145
	146	spin_lock_bh(&debug_log->lock);
	147
	148	buf++;
	149	i++;
	150
	151	}
	152
	153	spin_unlock_bh(&debug_log->lock);
	154
	155	if (!error)
	156	return i;
	157
	158	return error;
	159	}
	160
	161	static unsigned int log_poll(struct file file, poll_table wait)
	162	{
	163	struct bat_priv *bat_priv = file->private_data;
	164	struct debug_log *debug_log = bat_priv->debug_log;
	165
	166	poll_wait(file, &debug_log->queue_wait, wait);
	167
	168	if (debug_log->log_end - debug_log->log_start)
	169	return POLLIN \| POLLRDNORM;
	170
	171	return 0;
	172	}
	173
	174	static const struct file_operations log_fops = {
	175	.open = log_open,
	176	.release = log_release,
	177	.read = log_read,
	178	.poll = log_poll,
	179	.llseek = no_llseek,
	180	};
	181
	182	static int debug_log_setup(struct bat_priv *bat_priv)
	183	{
184	struct dentry *d;
185
186	if (!bat_priv->debug_dir)
187	goto err;
188
704509b8	189	bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC);
c6c8fea2 SE	190	if (!bat_priv->debug_log)
	191	goto err;
	192
	193	spin_lock_init(&bat_priv->debug_log->lock);
	194	init_waitqueue_head(&bat_priv->debug_log->queue_wait);
	195
	196	d = debugfs_create_file("log", S_IFREG \| S_IRUSR,
	197	bat_priv->debug_dir, bat_priv, &log_fops);
	198	if (d)
	199	goto err;
	200
	201	return 0;
	202
	203	err:
	204	return 1;
	205	}
	206
	207	static void debug_log_cleanup(struct bat_priv *bat_priv)
	208	{
	209	kfree(bat_priv->debug_log);
	210	bat_priv->debug_log = NULL;
	211	}
	212	#else /* CONFIG_BATMAN_ADV_DEBUG */
	213	static int debug_log_setup(struct bat_priv *bat_priv)
	214	{
	215	bat_priv->debug_log = NULL;
	216	return 0;
	217	}
	218
	219	static void debug_log_cleanup(struct bat_priv *bat_priv)
	220	{
	221	return;
	222	}
	223	#endif
	224
1c280471 ML	225	static int bat_algorithms_open(struct inode inode, struct file file)
	226	{
	227	return single_open(file, bat_algo_seq_print_text, NULL);
	228	}
	229
c6c8fea2 SE	230	static int originators_open(struct inode inode, struct file file)
	231	{
	232	struct net_device net_dev = (struct net_device )inode->i_private;
	233	return single_open(file, orig_seq_print_text, net_dev);
	234	}
	235
	236	static int gateways_open(struct inode inode, struct file file)
	237	{
	238	struct net_device net_dev = (struct net_device )inode->i_private;
	239	return single_open(file, gw_client_seq_print_text, net_dev);
	240	}
	241
c6c8fea2 SE	242	static int transtable_global_open(struct inode inode, struct file file)
	243	{
	244	struct net_device net_dev = (struct net_device )inode->i_private;
2dafb49d	245	return single_open(file, tt_global_seq_print_text, net_dev);
c6c8fea2 SE	246	}
c6c8fea2 SE	247
7a5cc242	248	#ifdef CONFIG_BATMAN_ADV_BLA
9bf8e4d4 SW	249	static int bla_claim_table_open(struct inode inode, struct file file)
	250	{
	251	struct net_device net_dev = (struct net_device )inode->i_private;
	252	return single_open(file, bla_claim_table_seq_print_text, net_dev);
	253	}
7a5cc242	254	#endif
9bf8e4d4	255
c6c8fea2 SE	256	static int transtable_local_open(struct inode inode, struct file file)
	257	{
	258	struct net_device net_dev = (struct net_device )inode->i_private;
2dafb49d	259	return single_open(file, tt_local_seq_print_text, net_dev);
c6c8fea2 SE	260	}
	261
	262	static int vis_data_open(struct inode inode, struct file file)
	263	{
	264	struct net_device net_dev = (struct net_device )inode->i_private;
	265	return single_open(file, vis_seq_print_text, net_dev);
	266	}
	267
	268	struct bat_debuginfo {
	269	struct attribute attr;
	270	const struct file_operations fops;
	271	};
	272
	273	#define BAT_DEBUGINFO(_name, _mode, _open) \
	274	struct bat_debuginfo bat_debuginfo_##_name = { \
	275	.attr = { .name = __stringify(_name), \
	276	.mode = _mode, }, \
	277	.fops = { .owner = THIS_MODULE, \
	278	.open = _open, \
	279	.read = seq_read, \
	280	.llseek = seq_lseek, \
	281	.release = single_release, \
	282	} \
	283	};
	284
1c280471	285	static BAT_DEBUGINFO(routing_algos, S_IRUGO, bat_algorithms_open);
c6c8fea2 SE	286	static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
c6c8fea2 SE	287	static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
c6c8fea2	288	static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
7a5cc242	289	#ifdef CONFIG_BATMAN_ADV_BLA
9bf8e4d4	290	static BAT_DEBUGINFO(bla_claim_table, S_IRUGO, bla_claim_table_open);
7a5cc242	291	#endif
c6c8fea2 SE	292	static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
	293	static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
	294
	295	static struct bat_debuginfo *mesh_debuginfos[] = {
	296	&bat_debuginfo_originators,
	297	&bat_debuginfo_gateways,
c6c8fea2	298	&bat_debuginfo_transtable_global,
7a5cc242	299	#ifdef CONFIG_BATMAN_ADV_BLA
9bf8e4d4	300	&bat_debuginfo_bla_claim_table,
7a5cc242	301	#endif
c6c8fea2 SE	302	&bat_debuginfo_transtable_local,
	303	&bat_debuginfo_vis_data,
	304	NULL,
	305	};
	306
	307	void debugfs_init(void)
	308	{
1c280471 ML	309	struct bat_debuginfo *bat_debug;
	310	struct dentry *file;
	311
c6c8fea2 SE	312	bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
	313	if (bat_debugfs == ERR_PTR(-ENODEV))
	314	bat_debugfs = NULL;
1c280471 ML	315
	316	if (!bat_debugfs)
	317	goto out;
	318
	319	bat_debug = &bat_debuginfo_routing_algos;
	320	file = debugfs_create_file(bat_debug->attr.name,
	321	S_IFREG \| bat_debug->attr.mode,
	322	bat_debugfs, NULL, &bat_debug->fops);
	323	if (!file)
	324	pr_err("Can't add debugfs file: %s\n", bat_debug->attr.name);
	325
	326	out:
	327	return;
c6c8fea2 SE	328	}
	329
	330	void debugfs_destroy(void)
	331	{
	332	if (bat_debugfs) {
	333	debugfs_remove_recursive(bat_debugfs);
	334	bat_debugfs = NULL;
	335	}
	336	}
	337
	338	int debugfs_add_meshif(struct net_device *dev)
	339	{
	340	struct bat_priv *bat_priv = netdev_priv(dev);
	341	struct bat_debuginfo **bat_debug;
	342	struct dentry *file;
	343
	344	if (!bat_debugfs)
	345	goto out;
	346
	347	bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs);
	348	if (!bat_priv->debug_dir)
	349	goto out;
	350
	351	bat_socket_setup(bat_priv);
	352	debug_log_setup(bat_priv);
	353
	354	for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) {
	355	file = debugfs_create_file(((*bat_debug)->attr).name,
	356	S_IFREG \| ((*bat_debug)->attr).mode,
	357	bat_priv->debug_dir,
	358	dev, &(*bat_debug)->fops);
	359	if (!file) {
	360	bat_err(dev, "Can't add debugfs file: %s/%s\n",
	361	dev->name, ((*bat_debug)->attr).name);
	362	goto rem_attr;
	363	}
	364	}
	365
	366	return 0;
	367	rem_attr:
	368	debugfs_remove_recursive(bat_priv->debug_dir);
	369	bat_priv->debug_dir = NULL;
	370	out:
	371	#ifdef CONFIG_DEBUG_FS
	372	return -ENOMEM;
	373	#else
	374	return 0;
	375	#endif /* CONFIG_DEBUG_FS */
	376	}
	377
	378	void debugfs_del_meshif(struct net_device *dev)
	379	{
	380	struct bat_priv *bat_priv = netdev_priv(dev);
	381
	382	debug_log_cleanup(bat_priv);
	383
	384	if (bat_debugfs) {
	385	debugfs_remove_recursive(bat_priv->debug_dir);
	386	bat_priv->debug_dir = NULL;
	387	}
	388	}