net/batman-adv/debugfs.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /* Copyright (C) 2010-2019  B.A.T.M.A.N. contributors:
  *
  * Marek Lindner
  */

 #include "debugfs.h"
 #include "main.h"

 #include <asm/current.h>
 #include <linux/dcache.h>
 #include <linux/debugfs.h>
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/export.h>
 #include <linux/fs.h>
 #include <linux/netdevice.h>
 #include <linux/printk.h>
 #include <linux/sched.h>
 #include <linux/seq_file.h>
 #include <linux/stat.h>
 #include <linux/stddef.h>
 #include <linux/stringify.h>
 #include <linux/sysfs.h>
 #include <net/net_namespace.h>

 #include "bat_algo.h"
 #include "bridge_loop_avoidance.h"
 #include "distributed-arp-table.h"
 #include "gateway_client.h"
 #include "icmp_socket.h"
 #include "log.h"
 #include "multicast.h"
 #include "network-coding.h"
 #include "originator.h"
 #include "translation-table.h"

 static struct dentry *batadv_debugfs;

 /**
  * batadv_debugfs_deprecated() - Log use of deprecated batadv debugfs access
  * @file: file which was accessed
  * @alt: explanation what can be used as alternative
  */
 void batadv_debugfs_deprecated(struct file *file, const char *alt)
 {
 	struct dentry *dentry = file_dentry(file);
 	const char *name = dentry->d_name.name;

 	pr_warn_ratelimited(DEPRECATED "%s (pid %d) Use of debugfs file \"%s\".\n%s",
 			    current->comm, task_pid_nr(current), name, alt);
 }

 static int batadv_algorithms_open(struct inode *inode, struct file *file)
 {
 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_ROUTING_ALGOS instead\n");
 	return single_open(file, batadv_algo_seq_print_text, NULL);
 }

 static int neighbors_open(struct inode *inode, struct file *file)
 {
 	struct net_device *net_dev = (struct net_device *)inode->i_private;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_NEIGHBORS instead\n");
 	return single_open(file, batadv_hardif_neigh_seq_print_text, net_dev);
 }

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

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_ORIGINATORS instead\n");
 	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
  *
  * Return: 0 on success or negative error number in case of failure
  */
 static int batadv_originators_hardif_open(struct inode *inode,
 					  struct file *file)
 {
 	struct net_device *net_dev = (struct net_device *)inode->i_private;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_HARDIFS instead\n");
 	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;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_GATEWAYS instead\n");
 	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;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_TRANSTABLE_GLOBAL instead\n");
 	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;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_BLA_CLAIM instead\n");
 	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;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_BLA_BACKBONE instead\n");
 	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_cache
  * @inode: inode which was opened
  * @file: file handle to be initialized
  *
  * Return: 0 on success or negative error number in case of failure
  */
 static int batadv_dat_cache_open(struct inode *inode, struct file *file)
 {
 	struct net_device *net_dev = (struct net_device *)inode->i_private;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_DAT_CACHE instead\n");
 	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;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_TRANSTABLE_LOCAL instead\n");
 	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;

 	batadv_debugfs_deprecated(file, "");
 	return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
 }
 #endif

 #ifdef CONFIG_BATMAN_ADV_MCAST
 /**
  * batadv_mcast_flags_open() - prepare file handler for reads from mcast_flags
  * @inode: inode which was opened
  * @file: file handle to be initialized
  *
  * Return: 0 on success or negative error number in case of failure
  */
 static int batadv_mcast_flags_open(struct inode *inode, struct file *file)
 {
 	struct net_device *net_dev = (struct net_device *)inode->i_private;

 	batadv_debugfs_deprecated(file,
 				  "Use genl command BATADV_CMD_GET_MCAST_FLAGS instead\n");
 	return single_open(file, batadv_mcast_flags_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, 0444, 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(neighbors, 0444, neighbors_open);
 static BATADV_DEBUGINFO(originators, 0444, batadv_originators_open);
 static BATADV_DEBUGINFO(gateways, 0444, batadv_gateways_open);
 static BATADV_DEBUGINFO(transtable_global, 0444, batadv_transtable_global_open);
 #ifdef CONFIG_BATMAN_ADV_BLA
 static BATADV_DEBUGINFO(bla_claim_table, 0444, batadv_bla_claim_table_open);
 static BATADV_DEBUGINFO(bla_backbone_table, 0444,
 			batadv_bla_backbone_table_open);
 #endif
 #ifdef CONFIG_BATMAN_ADV_DAT
 static BATADV_DEBUGINFO(dat_cache, 0444, batadv_dat_cache_open);
 #endif
 static BATADV_DEBUGINFO(transtable_local, 0444, batadv_transtable_local_open);
 #ifdef CONFIG_BATMAN_ADV_NC
 static BATADV_DEBUGINFO(nc_nodes, 0444, batadv_nc_nodes_open);
 #endif
 #ifdef CONFIG_BATMAN_ADV_MCAST
 static BATADV_DEBUGINFO(mcast_flags, 0444, batadv_mcast_flags_open);
 #endif

 static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
 	&batadv_debuginfo_neighbors,
 	&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
 #ifdef CONFIG_BATMAN_ADV_MCAST
 	&batadv_debuginfo_mcast_flags,
 #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, 0444,
 			       batadv_originators_hardif_open);

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

 /**
  * batadv_debugfs_init() - Initialize soft interface independent debugfs entries
  */
 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;
 }

 /**
  * batadv_debugfs_destroy() - Remove all debugfs entries
  */
 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.
  *
  * Return: 0 on success or negative error number in case of failure
  */
 int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
 {
 	struct net *net = dev_net(hard_iface->net_dev);
 	struct batadv_debuginfo **bat_debug;
 	struct dentry *file;

 	if (!batadv_debugfs)
 		goto out;

 	if (net != &init_net)
 		return 0;

 	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:
 	return -ENOMEM;
 }

 /**
  * batadv_debugfs_rename_hardif() - Fix debugfs path for renamed hardif
  * @hard_iface: hard interface which was renamed
  */
 void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
 {
 	const char *name = hard_iface->net_dev->name;
 	struct dentry *dir;
 	struct dentry *d;

 	dir = hard_iface->debug_dir;
 	if (!dir)
 		return;

 	d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
 	if (!d)
 		pr_err("Can't rename debugfs dir to %s\n", name);
 }

 /**
  * 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)
 {
 	struct net *net = dev_net(hard_iface->net_dev);

 	if (net != &init_net)
 		return;

 	if (batadv_debugfs) {
 		debugfs_remove_recursive(hard_iface->debug_dir);
 		hard_iface->debug_dir = NULL;
 	}
 }

 /**
  * batadv_debugfs_add_meshif() - Initialize interface dependent debugfs entries
  * @dev: netdev struct of the soft interface
  *
  * Return: 0 on success or negative error number in case of failure
  */
 int batadv_debugfs_add_meshif(struct net_device *dev)
 {
 	struct batadv_priv *bat_priv = netdev_priv(dev);
 	struct batadv_debuginfo **bat_debug;
 	struct net *net = dev_net(dev);
 	struct dentry *file;

 	if (!batadv_debugfs)
 		goto out;

 	if (net != &init_net)
 		return 0;

 	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:
 	return -ENOMEM;
 }

 /**
  * batadv_debugfs_rename_meshif() - Fix debugfs path for renamed softif
  * @dev: net_device which was renamed
  */
 void batadv_debugfs_rename_meshif(struct net_device *dev)
 {
 	struct batadv_priv *bat_priv = netdev_priv(dev);
 	const char *name = dev->name;
 	struct dentry *dir;
 	struct dentry *d;

 	dir = bat_priv->debug_dir;
 	if (!dir)
 		return;

 	d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
 	if (!d)
 		pr_err("Can't rename debugfs dir to %s\n", name);
 }

 /**
  * batadv_debugfs_del_meshif() - Remove interface dependent debugfs entries
  * @dev: netdev struct of the soft interface
  */
 void batadv_debugfs_del_meshif(struct net_device *dev)
 {
 	struct batadv_priv *bat_priv = netdev_priv(dev);
 	struct net *net = dev_net(dev);

 	if (net != &init_net)
 		return;

 	batadv_debug_log_cleanup(bat_priv);

 	if (batadv_debugfs) {
 		debugfs_remove_recursive(bat_priv->debug_dir);
 		bat_priv->debug_dir = NULL;
 	}
 }
	// SPDX-License-Identifier: GPL-2.0
	/* Copyright (C) 2010-2019 B.A.T.M.A.N. contributors:
	*
	* Marek Lindner
	*/

	#include "debugfs.h"
	#include "main.h"

	#include <asm/current.h>
	#include <linux/dcache.h>
	#include <linux/debugfs.h>
	#include <linux/err.h>
	#include <linux/errno.h>
	#include <linux/export.h>
	#include <linux/fs.h>
	#include <linux/netdevice.h>
	#include <linux/printk.h>
	#include <linux/sched.h>
	#include <linux/seq_file.h>
	#include <linux/stat.h>
	#include <linux/stddef.h>
	#include <linux/stringify.h>
	#include <linux/sysfs.h>
	#include <net/net_namespace.h>

	#include "bat_algo.h"
	#include "bridge_loop_avoidance.h"
	#include "distributed-arp-table.h"
	#include "gateway_client.h"
	#include "icmp_socket.h"
	#include "log.h"
	#include "multicast.h"
	#include "network-coding.h"
	#include "originator.h"
	#include "translation-table.h"

	static struct dentry *batadv_debugfs;

	/**
	* batadv_debugfs_deprecated() - Log use of deprecated batadv debugfs access
	* @file: file which was accessed
	* @alt: explanation what can be used as alternative
	*/
	void batadv_debugfs_deprecated(struct file file, const char alt)
	{
	struct dentry *dentry = file_dentry(file);
	const char *name = dentry->d_name.name;

	pr_warn_ratelimited(DEPRECATED "%s (pid %d) Use of debugfs file \"%s\".\n%s",
	current->comm, task_pid_nr(current), name, alt);
	}

	static int batadv_algorithms_open(struct inode inode, struct file file)
	{
	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_ROUTING_ALGOS instead\n");
	return single_open(file, batadv_algo_seq_print_text, NULL);
	}

	static int neighbors_open(struct inode inode, struct file file)
	{
	struct net_device net_dev = (struct net_device )inode->i_private;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_NEIGHBORS instead\n");
	return single_open(file, batadv_hardif_neigh_seq_print_text, net_dev);
	}

	static int batadv_originators_open(struct inode inode, struct file file)
	{
	struct net_device net_dev = (struct net_device )inode->i_private;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_ORIGINATORS instead\n");
	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
	*
	* Return: 0 on success or negative error number in case of failure
	*/
	static int batadv_originators_hardif_open(struct inode *inode,
	struct file *file)
	{
	struct net_device net_dev = (struct net_device )inode->i_private;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_HARDIFS instead\n");
	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;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_GATEWAYS instead\n");
	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;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_TRANSTABLE_GLOBAL instead\n");
	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;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_BLA_CLAIM instead\n");
	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;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_BLA_BACKBONE instead\n");
	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_cache
	* @inode: inode which was opened
	* @file: file handle to be initialized
	*
	* Return: 0 on success or negative error number in case of failure
	*/
	static int batadv_dat_cache_open(struct inode inode, struct file file)
	{
	struct net_device net_dev = (struct net_device )inode->i_private;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_DAT_CACHE instead\n");
	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;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_TRANSTABLE_LOCAL instead\n");
	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;

	batadv_debugfs_deprecated(file, "");
	return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
	}
	#endif

	#ifdef CONFIG_BATMAN_ADV_MCAST
	/**
	* batadv_mcast_flags_open() - prepare file handler for reads from mcast_flags
	* @inode: inode which was opened
	* @file: file handle to be initialized
	*
	* Return: 0 on success or negative error number in case of failure
	*/
	static int batadv_mcast_flags_open(struct inode inode, struct file file)
	{
	struct net_device net_dev = (struct net_device )inode->i_private;

	batadv_debugfs_deprecated(file,
	"Use genl command BATADV_CMD_GET_MCAST_FLAGS instead\n");
	return single_open(file, batadv_mcast_flags_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, 0444, 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(neighbors, 0444, neighbors_open);
	static BATADV_DEBUGINFO(originators, 0444, batadv_originators_open);
	static BATADV_DEBUGINFO(gateways, 0444, batadv_gateways_open);
	static BATADV_DEBUGINFO(transtable_global, 0444, batadv_transtable_global_open);
	#ifdef CONFIG_BATMAN_ADV_BLA
	static BATADV_DEBUGINFO(bla_claim_table, 0444, batadv_bla_claim_table_open);
	static BATADV_DEBUGINFO(bla_backbone_table, 0444,
	batadv_bla_backbone_table_open);
	#endif
	#ifdef CONFIG_BATMAN_ADV_DAT
	static BATADV_DEBUGINFO(dat_cache, 0444, batadv_dat_cache_open);
	#endif
	static BATADV_DEBUGINFO(transtable_local, 0444, batadv_transtable_local_open);
	#ifdef CONFIG_BATMAN_ADV_NC
	static BATADV_DEBUGINFO(nc_nodes, 0444, batadv_nc_nodes_open);
	#endif
	#ifdef CONFIG_BATMAN_ADV_MCAST
	static BATADV_DEBUGINFO(mcast_flags, 0444, batadv_mcast_flags_open);
	#endif

	static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
	&batadv_debuginfo_neighbors,
	&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
	#ifdef CONFIG_BATMAN_ADV_MCAST
	&batadv_debuginfo_mcast_flags,
	#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, 0444,
	batadv_originators_hardif_open);

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

	/**
	* batadv_debugfs_init() - Initialize soft interface independent debugfs entries
	*/
	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;
	}

	/**
	* batadv_debugfs_destroy() - Remove all debugfs entries
	*/
	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.
	*
	* Return: 0 on success or negative error number in case of failure
	*/
	int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
	{
	struct net *net = dev_net(hard_iface->net_dev);
	struct batadv_debuginfo **bat_debug;
	struct dentry *file;

	if (!batadv_debugfs)
	goto out;

	if (net != &init_net)
	return 0;

	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:
	return -ENOMEM;
	}

	/**
	* batadv_debugfs_rename_hardif() - Fix debugfs path for renamed hardif
	* @hard_iface: hard interface which was renamed
	*/
	void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
	{
	const char *name = hard_iface->net_dev->name;
	struct dentry *dir;
	struct dentry *d;

	dir = hard_iface->debug_dir;
	if (!dir)
	return;

	d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
	if (!d)
	pr_err("Can't rename debugfs dir to %s\n", name);
	}

	/**
	* 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)
	{
	struct net *net = dev_net(hard_iface->net_dev);

	if (net != &init_net)
	return;

	if (batadv_debugfs) {
	debugfs_remove_recursive(hard_iface->debug_dir);
	hard_iface->debug_dir = NULL;
	}
	}

	/**
	* batadv_debugfs_add_meshif() - Initialize interface dependent debugfs entries
	* @dev: netdev struct of the soft interface
	*
	* Return: 0 on success or negative error number in case of failure
	*/
	int batadv_debugfs_add_meshif(struct net_device *dev)
	{
	struct batadv_priv *bat_priv = netdev_priv(dev);
	struct batadv_debuginfo **bat_debug;
	struct net *net = dev_net(dev);
	struct dentry *file;

	if (!batadv_debugfs)
	goto out;

	if (net != &init_net)
	return 0;

	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:
	return -ENOMEM;
	}

	/**
	* batadv_debugfs_rename_meshif() - Fix debugfs path for renamed softif
	* @dev: net_device which was renamed
	*/
	void batadv_debugfs_rename_meshif(struct net_device *dev)
	{
	struct batadv_priv *bat_priv = netdev_priv(dev);
	const char *name = dev->name;
	struct dentry *dir;
	struct dentry *d;

	dir = bat_priv->debug_dir;
	if (!dir)
	return;

	d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
	if (!d)
	pr_err("Can't rename debugfs dir to %s\n", name);
	}

	/**
	* batadv_debugfs_del_meshif() - Remove interface dependent debugfs entries
	* @dev: netdev struct of the soft interface
	*/
	void batadv_debugfs_del_meshif(struct net_device *dev)
	{
	struct batadv_priv *bat_priv = netdev_priv(dev);
	struct net *net = dev_net(dev);

	if (net != &init_net)
	return;

	batadv_debug_log_cleanup(bat_priv);

	if (batadv_debugfs) {
	debugfs_remove_recursive(bat_priv->debug_dir);
	bat_priv->debug_dir = NULL;
	}
	}