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

/* Copyright (C) 2010-2014 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, see <http://www.gnu.org/licenses/>.
 */

#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 "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);
}

/**
 * batadv_originators_hardif_open - handles debugfs output for the
 *  originator table of an hard interface
 * @inode: inode pointer to debugfs file
 * @file: pointer to the seq_file
 */
static int batadv_originators_hardif_open(struct inode *inode,
					  struct file *file)
{
	struct net_device *net_dev = (struct net_device *)inode->i_private;
	return single_open(file, batadv_orig_hardif_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);
}

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);
#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,
#ifdef CONFIG_BATMAN_ADV_NC
	&batadv_debuginfo_nc_nodes,
#endif
	NULL,
};

#define BATADV_HARDIF_DEBUGINFO(_name, _mode, _open)		\
struct batadv_debuginfo batadv_hardif_debuginfo_##_name = {	\
	.attr = {						\
		.name = __stringify(_name),			\
		.mode = _mode,					\
	},							\
	.fops = {						\
		.owner = THIS_MODULE,				\
		.open = _open,					\
		.read	= seq_read,				\
		.llseek = seq_lseek,				\
		.release = single_release,			\
	},							\
};
static BATADV_HARDIF_DEBUGINFO(originators, S_IRUGO,
			       batadv_originators_hardif_open);

static struct batadv_debuginfo *batadv_hardif_debuginfos[] = {
	&batadv_hardif_debuginfo_originators,
	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);
	batadv_debugfs = NULL;
}

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

/**
 * batadv_debugfs_add_hardif - creates the base directory for a hard interface
 *  in debugfs.
 * @hard_iface: hard interface which should be added.
 */
int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
{
	struct batadv_debuginfo **bat_debug;
	struct dentry *file;

	if (!batadv_debugfs)
		goto out;

	hard_iface->debug_dir = debugfs_create_dir(hard_iface->net_dev->name,
						   batadv_debugfs);
	if (!hard_iface->debug_dir)
		goto out;

	for (bat_debug = batadv_hardif_debuginfos; *bat_debug; ++bat_debug) {
		file = debugfs_create_file(((*bat_debug)->attr).name,
					   S_IFREG | ((*bat_debug)->attr).mode,
					   hard_iface->debug_dir,
					   hard_iface->net_dev,
					   &(*bat_debug)->fops);
		if (!file)
			goto rem_attr;
	}

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

/**
 * batadv_debugfs_del_hardif - delete the base directory for a hard interface
 *  in debugfs.
 * @hard_iface: hard interface which is deleted.
 */
void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
{
	if (batadv_debugfs) {
		debugfs_remove_recursive(hard_iface->debug_dir);
		hard_iface->debug_dir = 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
e19f9759	1	/* Copyright (C) 2010-2014 B.A.T.M.A.N. contributors:
c6c8fea2 SE	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
ebf38fb7	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
c6c8fea2 SE	16	*/
	17
	18	#include "main.h"
	19
	20	#include <linux/debugfs.h>
	21
b706b13b	22	#include "debugfs.h"
c6c8fea2 SE	23	#include "translation-table.h"
	24	#include "originator.h"
	25	#include "hard-interface.h"
	26	#include "gateway_common.h"
	27	#include "gateway_client.h"
	28	#include "soft-interface.h"
c6c8fea2	29	#include "icmp_socket.h"
9bf8e4d4	30	#include "bridge_loop_avoidance.h"
2f1dfbe1	31	#include "distributed-arp-table.h"
d56b1705	32	#include "network-coding.h"
c6c8fea2	33
9e466250	34	static struct dentry *batadv_debugfs;
c6c8fea2 SE	35
c6c8fea2 SE	36	#ifdef CONFIG_BATMAN_ADV_DEBUG
347c80f0	37	#define BATADV_LOG_BUFF_MASK (batadv_log_buff_len - 1)
c6c8fea2	38
a8a0a62d SE	39	static const int batadv_log_buff_len = BATADV_LOG_BUF_LEN;
a8a0a62d SE	40
0abf5d81	41	static char batadv_log_char_addr(struct batadv_priv_debug_log debug_log,
a8a0a62d SE	42	size_t idx)
	43	{
	44	return &debug_log->log_buff[idx & BATADV_LOG_BUFF_MASK];
	45	}
c6c8fea2	46
0abf5d81 ML	47	static void batadv_emit_log_char(struct batadv_priv_debug_log *debug_log,
0abf5d81 ML	48	char c)
c6c8fea2	49	{
a8a0a62d SE	50	char *char_addr;
	51
	52	char_addr = batadv_log_char_addr(debug_log, debug_log->log_end);
	53	*char_addr = c;
c6c8fea2 SE	54	debug_log->log_end++;
c6c8fea2 SE	55
9e466250 SE	56	if (debug_log->log_end - debug_log->log_start > batadv_log_buff_len)
9e466250 SE	57	debug_log->log_start = debug_log->log_end - batadv_log_buff_len;
c6c8fea2 SE	58	}
c6c8fea2 SE	59
d3a547be	60	__printf(2, 3)
0abf5d81	61	static int batadv_fdebug_log(struct batadv_priv_debug_log *debug_log,
56303d34	62	const char *fmt, ...)
c6c8fea2	63	{
c6c8fea2 SE	64	va_list args;
	65	static char debug_log_buf[256];
	66	char *p;
	67
	68	if (!debug_log)
	69	return 0;
	70
	71	spin_lock_bh(&debug_log->lock);
	72	va_start(args, fmt);
1299bdaa	73	vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args);
c6c8fea2 SE	74	va_end(args);
	75
	76	for (p = debug_log_buf; *p != 0; p++)
9e466250	77	batadv_emit_log_char(debug_log, *p);
c6c8fea2 SE	78
	79	spin_unlock_bh(&debug_log->lock);
	80
	81	wake_up(&debug_log->queue_wait);
	82
	83	return 0;
	84	}
	85
56303d34	86	int batadv_debug_log(struct batadv_priv bat_priv, const char fmt, ...)
c6c8fea2 SE	87	{
	88	va_list args;
	89	char tmp_log_buf[256];
	90
	91	va_start(args, fmt);
	92	vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
9e466250 SE	93	batadv_fdebug_log(bat_priv->debug_log, "[%10u] %s",
9e466250 SE	94	jiffies_to_msecs(jiffies), tmp_log_buf);
c6c8fea2 SE	95	va_end(args);
	96
	97	return 0;
	98	}
	99
9e466250	100	static int batadv_log_open(struct inode inode, struct file file)
c6c8fea2	101	{
bd5b80d5 SE	102	if (!try_module_get(THIS_MODULE))
	103	return -EBUSY;
	104
c6c8fea2 SE	105	nonseekable_open(inode, file);
c6c8fea2 SE	106	file->private_data = inode->i_private;
c6c8fea2 SE	107	return 0;
	108	}
	109
9e466250	110	static int batadv_log_release(struct inode inode, struct file file)
c6c8fea2	111	{
bd5b80d5	112	module_put(THIS_MODULE);
c6c8fea2 SE	113	return 0;
	114	}
	115
0abf5d81	116	static int batadv_log_empty(struct batadv_priv_debug_log *debug_log)
0aca2369 SE	117	{
	118	return !(debug_log->log_start - debug_log->log_end);
	119	}
	120
9e466250 SE	121	static ssize_t batadv_log_read(struct file file, char __user buf,
9e466250 SE	122	size_t count, loff_t *ppos)
c6c8fea2	123	{
56303d34	124	struct batadv_priv *bat_priv = file->private_data;
0abf5d81	125	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
c6c8fea2	126	int error, i = 0;
a8a0a62d	127	char *char_addr;
c6c8fea2 SE	128	char c;
c6c8fea2 SE	129
0aca2369	130	if ((file->f_flags & O_NONBLOCK) && batadv_log_empty(debug_log))
c6c8fea2 SE	131	return -EAGAIN;
c6c8fea2 SE	132
16f14b45	133	if (!buf)
c6c8fea2 SE	134	return -EINVAL;
	135
	136	if (count == 0)
	137	return 0;
	138
	139	if (!access_ok(VERIFY_WRITE, buf, count))
	140	return -EFAULT;
	141
	142	error = wait_event_interruptible(debug_log->queue_wait,
0aca2369	143	(!batadv_log_empty(debug_log)));
c6c8fea2 SE	144
	145	if (error)
	146	return error;
	147
	148	spin_lock_bh(&debug_log->lock);
	149
	150	while ((!error) && (i < count) &&
	151	(debug_log->log_start != debug_log->log_end)) {
a8a0a62d SE	152	char_addr = batadv_log_char_addr(debug_log,
	153	debug_log->log_start);
	154	c = *char_addr;
c6c8fea2 SE	155
	156	debug_log->log_start++;
	157
	158	spin_unlock_bh(&debug_log->lock);
	159
	160	error = __put_user(c, buf);
	161
	162	spin_lock_bh(&debug_log->lock);
	163
	164	buf++;
	165	i++;
c6c8fea2 SE	166	}
	167
	168	spin_unlock_bh(&debug_log->lock);
	169
	170	if (!error)
	171	return i;
	172
	173	return error;
	174	}
	175
9e466250	176	static unsigned int batadv_log_poll(struct file file, poll_table wait)
c6c8fea2	177	{
56303d34	178	struct batadv_priv *bat_priv = file->private_data;
0abf5d81	179	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
c6c8fea2 SE	180
	181	poll_wait(file, &debug_log->queue_wait, wait);
	182
0aca2369	183	if (!batadv_log_empty(debug_log))
c6c8fea2 SE	184	return POLLIN \| POLLRDNORM;
	185
	186	return 0;
	187	}
	188
9e466250 SE	189	static const struct file_operations batadv_log_fops = {
	190	.open = batadv_log_open,
	191	.release = batadv_log_release,
	192	.read = batadv_log_read,
	193	.poll = batadv_log_poll,
c6c8fea2 SE	194	.llseek = no_llseek,
	195	};
	196
56303d34	197	static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
c6c8fea2 SE	198	{
	199	struct dentry *d;
	200
	201	if (!bat_priv->debug_dir)
	202	goto err;
	203
704509b8	204	bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC);
c6c8fea2 SE	205	if (!bat_priv->debug_log)
	206	goto err;
	207
	208	spin_lock_init(&bat_priv->debug_log->lock);
	209	init_waitqueue_head(&bat_priv->debug_log->queue_wait);
	210
	211	d = debugfs_create_file("log", S_IFREG \| S_IRUSR,
9e466250 SE	212	bat_priv->debug_dir, bat_priv,
9e466250 SE	213	&batadv_log_fops);
5346c35e	214	if (!d)
c6c8fea2 SE	215	goto err;
	216
	217	return 0;
	218
	219	err:
5346c35e	220	return -ENOMEM;
c6c8fea2 SE	221	}
c6c8fea2 SE	222
56303d34	223	static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
c6c8fea2 SE	224	{
	225	kfree(bat_priv->debug_log);
	226	bat_priv->debug_log = NULL;
	227	}
	228	#else /* CONFIG_BATMAN_ADV_DEBUG */
56303d34	229	static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
c6c8fea2	230	{
c6c8fea2 SE	231	return 0;
	232	}
	233
56303d34	234	static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
c6c8fea2 SE	235	{
	236	return;
	237	}
	238	#endif
	239
9e466250	240	static int batadv_algorithms_open(struct inode inode, struct file file)
1c280471	241	{
3193e8fd	242	return single_open(file, batadv_algo_seq_print_text, NULL);
1c280471 ML	243	}
1c280471 ML	244
9e466250	245	static int batadv_originators_open(struct inode inode, struct file file)
c6c8fea2 SE	246	{
c6c8fea2 SE	247	struct net_device net_dev = (struct net_device )inode->i_private;
7d211efc	248	return single_open(file, batadv_orig_seq_print_text, net_dev);
c6c8fea2 SE	249	}
c6c8fea2 SE	250
cb1c92ec SW	251	/**
	252	* batadv_originators_hardif_open - handles debugfs output for the
	253	* originator table of an hard interface
	254	* @inode: inode pointer to debugfs file
	255	* @file: pointer to the seq_file
	256	*/
	257	static int batadv_originators_hardif_open(struct inode *inode,
	258	struct file *file)
	259	{
	260	struct net_device net_dev = (struct net_device )inode->i_private;
	261	return single_open(file, batadv_orig_hardif_seq_print_text, net_dev);
	262	}
	263
9e466250	264	static int batadv_gateways_open(struct inode inode, struct file file)
c6c8fea2 SE	265	{
c6c8fea2 SE	266	struct net_device net_dev = (struct net_device )inode->i_private;
7cf06bc6	267	return single_open(file, batadv_gw_client_seq_print_text, net_dev);
c6c8fea2 SE	268	}
c6c8fea2 SE	269
9e466250	270	static int batadv_transtable_global_open(struct inode inode, struct file file)
c6c8fea2 SE	271	{
c6c8fea2 SE	272	struct net_device net_dev = (struct net_device )inode->i_private;
08c36d3e	273	return single_open(file, batadv_tt_global_seq_print_text, net_dev);
c6c8fea2 SE	274	}
c6c8fea2 SE	275
7a5cc242	276	#ifdef CONFIG_BATMAN_ADV_BLA
9e466250	277	static int batadv_bla_claim_table_open(struct inode inode, struct file file)
9bf8e4d4 SW	278	{
9bf8e4d4 SW	279	struct net_device net_dev = (struct net_device )inode->i_private;
08adf151 SE	280	return single_open(file, batadv_bla_claim_table_seq_print_text,
08adf151 SE	281	net_dev);
9bf8e4d4	282	}
536a23f1 SW	283
	284	static int batadv_bla_backbone_table_open(struct inode *inode,
	285	struct file *file)
	286	{
	287	struct net_device net_dev = (struct net_device )inode->i_private;
	288	return single_open(file, batadv_bla_backbone_table_seq_print_text,
	289	net_dev);
	290	}
	291
7a5cc242	292	#endif
9bf8e4d4	293
17224474	294	#ifdef CONFIG_BATMAN_ADV_DAT
2f1dfbe1 AQ	295	/**
	296	* batadv_dat_cache_open - Prepare file handler for reads from dat_chache
	297	* @inode: inode which was opened
	298	* @file: file handle to be initialized
	299	*/
	300	static int batadv_dat_cache_open(struct inode inode, struct file file)
	301	{
	302	struct net_device net_dev = (struct net_device )inode->i_private;
	303	return single_open(file, batadv_dat_cache_seq_print_text, net_dev);
	304	}
17224474	305	#endif
2f1dfbe1	306
9e466250	307	static int batadv_transtable_local_open(struct inode inode, struct file file)
c6c8fea2 SE	308	{
c6c8fea2 SE	309	struct net_device net_dev = (struct net_device )inode->i_private;
08c36d3e	310	return single_open(file, batadv_tt_local_seq_print_text, net_dev);
c6c8fea2 SE	311	}
c6c8fea2 SE	312
7f223c0c	313	struct batadv_debuginfo {
c6c8fea2 SE	314	struct attribute attr;
	315	const struct file_operations fops;
	316	};
	317
d56b1705 MH	318	#ifdef CONFIG_BATMAN_ADV_NC
	319	static int batadv_nc_nodes_open(struct inode inode, struct file file)
	320	{
	321	struct net_device net_dev = (struct net_device )inode->i_private;
	322	return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
	323	}
	324	#endif
	325
347c80f0	326	#define BATADV_DEBUGINFO(_name, _mode, _open) \
7f223c0c	327	struct batadv_debuginfo batadv_debuginfo_##_name = { \
9e466250 SE	328	.attr = { .name = __stringify(_name), \
	329	.mode = _mode, }, \
	330	.fops = { .owner = THIS_MODULE, \
	331	.open = _open, \
	332	.read = seq_read, \
	333	.llseek = seq_lseek, \
	334	.release = single_release, \
	335	} \
c6c8fea2 SE	336	};
c6c8fea2 SE	337
637fbd12 AQ	338	/* the following attributes are general and therefore they will be directly
	339	* placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs
	340	*/
347c80f0	341	static BATADV_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open);
637fbd12 AQ	342
	343	static struct batadv_debuginfo *batadv_general_debuginfos[] = {
	344	&batadv_debuginfo_routing_algos,
	345	NULL,
	346	};
	347
	348	/* The following attributes are per soft interface */
347c80f0 SE	349	static BATADV_DEBUGINFO(originators, S_IRUGO, batadv_originators_open);
	350	static BATADV_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open);
	351	static BATADV_DEBUGINFO(transtable_global, S_IRUGO,
	352	batadv_transtable_global_open);
7a5cc242	353	#ifdef CONFIG_BATMAN_ADV_BLA
347c80f0	354	static BATADV_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open);
536a23f1 SW	355	static BATADV_DEBUGINFO(bla_backbone_table, S_IRUGO,
536a23f1 SW	356	batadv_bla_backbone_table_open);
7a5cc242	357	#endif
17224474	358	#ifdef CONFIG_BATMAN_ADV_DAT
2f1dfbe1	359	static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
17224474	360	#endif
347c80f0 SE	361	static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
347c80f0 SE	362	batadv_transtable_local_open);
d56b1705 MH	363	#ifdef CONFIG_BATMAN_ADV_NC
	364	static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
	365	#endif
c6c8fea2	366
7f223c0c	367	static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
9e466250 SE	368	&batadv_debuginfo_originators,
	369	&batadv_debuginfo_gateways,
	370	&batadv_debuginfo_transtable_global,
7a5cc242	371	#ifdef CONFIG_BATMAN_ADV_BLA
9e466250	372	&batadv_debuginfo_bla_claim_table,
536a23f1	373	&batadv_debuginfo_bla_backbone_table,
7a5cc242	374	#endif
17224474	375	#ifdef CONFIG_BATMAN_ADV_DAT
2f1dfbe1	376	&batadv_debuginfo_dat_cache,
17224474	377	#endif
9e466250	378	&batadv_debuginfo_transtable_local,
d56b1705 MH	379	#ifdef CONFIG_BATMAN_ADV_NC
	380	&batadv_debuginfo_nc_nodes,
	381	#endif
c6c8fea2 SE	382	NULL,
	383	};
	384
5bc7c1eb SW	385	#define BATADV_HARDIF_DEBUGINFO(_name, _mode, _open) \
	386	struct batadv_debuginfo batadv_hardif_debuginfo_##_name = { \
	387	.attr = { \
	388	.name = __stringify(_name), \
	389	.mode = _mode, \
	390	}, \
	391	.fops = { \
	392	.owner = THIS_MODULE, \
	393	.open = _open, \
	394	.read = seq_read, \
	395	.llseek = seq_lseek, \
	396	.release = single_release, \
	397	}, \
	398	};
cb1c92ec SW	399	static BATADV_HARDIF_DEBUGINFO(originators, S_IRUGO,
cb1c92ec SW	400	batadv_originators_hardif_open);
5bc7c1eb SW	401
5bc7c1eb SW	402	static struct batadv_debuginfo *batadv_hardif_debuginfos[] = {
cb1c92ec	403	&batadv_hardif_debuginfo_originators,
5bc7c1eb SW	404	NULL,
	405	};
	406
40a072d7	407	void batadv_debugfs_init(void)
c6c8fea2	408	{
637fbd12	409	struct batadv_debuginfo **bat_debug;
1c280471 ML	410	struct dentry *file;
1c280471 ML	411
54590e4d	412	batadv_debugfs = debugfs_create_dir(BATADV_DEBUGFS_SUBDIR, NULL);
9e466250 SE	413	if (batadv_debugfs == ERR_PTR(-ENODEV))
9e466250 SE	414	batadv_debugfs = NULL;
1c280471	415
9e466250	416	if (!batadv_debugfs)
637fbd12	417	goto err;
1c280471	418
637fbd12 AQ	419	for (bat_debug = batadv_general_debuginfos; *bat_debug; ++bat_debug) {
	420	file = debugfs_create_file(((*bat_debug)->attr).name,
	421	S_IFREG \| ((*bat_debug)->attr).mode,
	422	batadv_debugfs, NULL,
	423	&(*bat_debug)->fops);
	424	if (!file) {
	425	pr_err("Can't add general debugfs file: %s\n",
	426	((*bat_debug)->attr).name);
	427	goto err;
	428	}
	429	}
1c280471	430
1c280471	431	return;
637fbd12 AQ	432	err:
637fbd12 AQ	433	debugfs_remove_recursive(batadv_debugfs);
5bc7c1eb	434	batadv_debugfs = NULL;
c6c8fea2 SE	435	}
c6c8fea2 SE	436
40a072d7	437	void batadv_debugfs_destroy(void)
c6c8fea2	438	{
3f87c423 AQ	439	debugfs_remove_recursive(batadv_debugfs);
3f87c423 AQ	440	batadv_debugfs = NULL;
c6c8fea2 SE	441	}
c6c8fea2 SE	442
5bc7c1eb SW	443	/**
	444	* batadv_debugfs_add_hardif - creates the base directory for a hard interface
	445	* in debugfs.
	446	* @hard_iface: hard interface which should be added.
	447	*/
	448	int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
	449	{
	450	struct batadv_debuginfo **bat_debug;
	451	struct dentry *file;
	452
	453	if (!batadv_debugfs)
	454	goto out;
	455
	456	hard_iface->debug_dir = debugfs_create_dir(hard_iface->net_dev->name,
	457	batadv_debugfs);
	458	if (!hard_iface->debug_dir)
	459	goto out;
	460
	461	for (bat_debug = batadv_hardif_debuginfos; *bat_debug; ++bat_debug) {
	462	file = debugfs_create_file(((*bat_debug)->attr).name,
	463	S_IFREG \| ((*bat_debug)->attr).mode,
	464	hard_iface->debug_dir,
	465	hard_iface->net_dev,
	466	&(*bat_debug)->fops);
	467	if (!file)
	468	goto rem_attr;
	469	}
	470
	471	return 0;
	472	rem_attr:
	473	debugfs_remove_recursive(hard_iface->debug_dir);
	474	hard_iface->debug_dir = NULL;
	475	out:
	476	#ifdef CONFIG_DEBUG_FS
	477	return -ENOMEM;
	478	#else
	479	return 0;
	480	#endif /* CONFIG_DEBUG_FS */
	481	}
	482
	483	/**
	484	* batadv_debugfs_del_hardif - delete the base directory for a hard interface
	485	* in debugfs.
	486	* @hard_iface: hard interface which is deleted.
	487	*/
	488	void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
	489	{
	490	if (batadv_debugfs) {
	491	debugfs_remove_recursive(hard_iface->debug_dir);
	492	hard_iface->debug_dir = NULL;
	493	}
	494	}
	495
40a072d7	496	int batadv_debugfs_add_meshif(struct net_device *dev)
c6c8fea2	497	{
56303d34	498	struct batadv_priv *bat_priv = netdev_priv(dev);
7f223c0c	499	struct batadv_debuginfo **bat_debug;
c6c8fea2 SE	500	struct dentry *file;
c6c8fea2 SE	501
9e466250	502	if (!batadv_debugfs)
c6c8fea2 SE	503	goto out;
c6c8fea2 SE	504
9e466250	505	bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs);
c6c8fea2 SE	506	if (!bat_priv->debug_dir)
	507	goto out;
	508
9039dc7e	509	if (batadv_socket_setup(bat_priv) < 0)
5346c35e SE	510	goto rem_attr;
5346c35e SE	511
9e466250	512	if (batadv_debug_log_setup(bat_priv) < 0)
5346c35e	513	goto rem_attr;
c6c8fea2	514
9e466250	515	for (bat_debug = batadv_mesh_debuginfos; *bat_debug; ++bat_debug) {
c6c8fea2	516	file = debugfs_create_file(((*bat_debug)->attr).name,
0aca2369 SE	517	S_IFREG \| ((*bat_debug)->attr).mode,
	518	bat_priv->debug_dir,
	519	dev, &(*bat_debug)->fops);
c6c8fea2	520	if (!file) {
3e34819e SE	521	batadv_err(dev, "Can't add debugfs file: %s/%s\n",
3e34819e SE	522	dev->name, ((*bat_debug)->attr).name);
c6c8fea2 SE	523	goto rem_attr;
	524	}
	525	}
	526
d56b1705 MH	527	if (batadv_nc_init_debugfs(bat_priv) < 0)
	528	goto rem_attr;
	529
c6c8fea2 SE	530	return 0;
	531	rem_attr:
	532	debugfs_remove_recursive(bat_priv->debug_dir);
	533	bat_priv->debug_dir = NULL;
	534	out:
	535	#ifdef CONFIG_DEBUG_FS
	536	return -ENOMEM;
	537	#else
	538	return 0;
	539	#endif /* CONFIG_DEBUG_FS */
	540	}
	541
40a072d7	542	void batadv_debugfs_del_meshif(struct net_device *dev)
c6c8fea2	543	{
56303d34	544	struct batadv_priv *bat_priv = netdev_priv(dev);
c6c8fea2	545
9e466250	546	batadv_debug_log_cleanup(bat_priv);
c6c8fea2	547
9e466250	548	if (batadv_debugfs) {
c6c8fea2 SE	549	debugfs_remove_recursive(bat_priv->debug_dir);
	550	bat_priv->debug_dir = NULL;
	551	}
	552	}