linux/net/8021q/vlanproc.c

// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
 * vlanproc.c	VLAN Module. /proc filesystem interface.
 *
 *		This module is completely hardware-independent and provides
 *		access to the router using Linux /proc filesystem.
 *
 * Author:	Ben Greear, <[email protected]> coppied from wanproc.c
 *               by: Gene Kozin	<[email protected]>
 *
 * Copyright:	(c) 1998 Ben Greear
 *
 * ============================================================================
 * Jan 20, 1998        Ben Greear     Initial Version
 *****************************************************************************/

#define pr_fmt(fmt) …

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/fs.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include "vlanproc.h"
#include "vlan.h"

/****** Function Prototypes *************************************************/

/* Methods for preparing data for reading proc entries */
static int vlan_seq_show(struct seq_file *seq, void *v);
static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
static void vlan_seq_stop(struct seq_file *seq, void *);
static int vlandev_seq_show(struct seq_file *seq, void *v);

/*
 *	Global Data
 */


/*
 *	Names of the proc directory entries
 */

static const char name_root[]	 = …;
static const char name_conf[]	 = …;

/*
 *	Structures for interfacing with the /proc filesystem.
 *	VLAN creates its own directory /proc/net/vlan with the following
 *	entries:
 *	config		device status/configuration
 *	<device>	entry for each  device
 */

/*
 *	Generic /proc/net/vlan/<file> file and inode operations
 */

static const struct seq_operations vlan_seq_ops = …;

/*
 * Proc filesystem directory entries.
 */

/* Strings */
static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = …;
/*
 *	Interface functions
 */

/*
 *	Clean up /proc/net/vlan entries
 */

void vlan_proc_cleanup(struct net *net)
{ … }

/*
 *	Create /proc/net/vlan entries
 */

int __net_init vlan_proc_init(struct net *net)
{ … }

/*
 *	Add directory entry for VLAN device.
 */

int vlan_proc_add_dev(struct net_device *vlandev)
{ … }

/*
 *	Delete directory entry for VLAN device.
 */
void vlan_proc_rem_dev(struct net_device *vlandev)
{ … }

/****** Proc filesystem entry points ****************************************/

/*
 * The following few functions build the content of /proc/net/vlan/config
 */

static void *vlan_seq_from_index(struct seq_file *seq, loff_t *pos)
{ … }

static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(rcu)
{ … }

static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{ … }

static void vlan_seq_stop(struct seq_file *seq, void *v)
	__releases(rcu)
{ … }

static int vlan_seq_show(struct seq_file *seq, void *v)
{ … }

static int vlandev_seq_show(struct seq_file *seq, void *offset)
{ … }