Release 4.14 net/8021q/vlanproc.c

/******************************************************************************
 * 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, <greearb@candelatech.com> coppied from wanproc.c
 *               by: Gene Kozin <genek@compuserve.com>
 *
 * Copyright:   (c) 1998 Ben Greear
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 * ============================================================================
 * Jan 20, 1998        Ben Greear     Initial Version
 *****************************************************************************/


#define pr_fmt(fmt) KBUILD_MODNAME ": " 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[]	 = "vlan";

static const char name_conf[]	 = "config";

/*
 *      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 = {
	.start = vlan_seq_start,
	.next = vlan_seq_next,
	.stop = vlan_seq_stop,
	.show = vlan_seq_show,
};



static int vlan_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &vlan_seq_ops,
			sizeof(struct seq_net_private));
}

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static const struct file_operations vlan_fops = {
	.owner	 = THIS_MODULE,
	.open    = vlan_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_net,
};

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



static int vlandev_seq_open(struct inode *inode, struct file *file)
{
	return single_open(file, vlandev_seq_show, PDE_DATA(inode));
}

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static const struct file_operations vlandev_fops = {
	.owner = THIS_MODULE,
	.open    = vlandev_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = single_release,
};

/*
 * Proc filesystem directory entries.
 */

/* Strings */

static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
    [VLAN_NAME_TYPE_RAW_PLUS_VID]        = "VLAN_NAME_TYPE_RAW_PLUS_VID",
    [VLAN_NAME_TYPE_PLUS_VID_NO_PAD]	 = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
    [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
    [VLAN_NAME_TYPE_PLUS_VID]		 = "VLAN_NAME_TYPE_PLUS_VID",
};
/*
 *      Interface functions
 */

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



void vlan_proc_cleanup(struct net *net)
{
	struct vlan_net *vn = net_generic(net, vlan_net_id);

	if (vn->proc_vlan_conf)
		remove_proc_entry(name_conf, vn->proc_vlan_dir);

	if (vn->proc_vlan_dir)
		remove_proc_entry(name_root, net->proc_net);

	/* Dynamically added entries should be cleaned up as their vlan_device
         * is removed, so we should not have to take care of it here...
         */
}

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53
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/*
 *      Create /proc/net/vlan entries
 */



int __net_init vlan_proc_init(struct net *net)
{
	struct vlan_net *vn = net_generic(net, vlan_net_id);

	vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
	if (!vn->proc_vlan_dir)
		goto err;

	vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
				     vn->proc_vlan_dir, &vlan_fops);
	if (!vn->proc_vlan_conf)
		goto err;
	return 0;

err:
	pr_err("can't create entry in proc filesystem!\n");
	vlan_proc_cleanup(net);
	return -ENOBUFS;
}

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34
34.34%
2
28.57%
Patrick McHardy
14
14.14%
1
14.29%
Wang Chen
4
4.04%
1
14.29%
Joe Perches
1
1.01%
1
14.29%
Alexey Dobriyan
1
1.01%
1
14.29%
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99
100.00%
7
100.00%

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



int vlan_proc_add_dev(struct net_device *vlandev)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
	struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);

	if (!strcmp(vlandev->name, name_conf))
		return -EINVAL;
	vlan->dent =
		proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
				 vn->proc_vlan_dir, &vlandev_fops, vlandev);
	if (!vlan->dent)
		return -ENOBUFS;
	return 0;
}

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16.67%
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17
18.68%
1
16.67%
Américo Wang
16
17.58%
1
16.67%
Jiri Pirko
5
5.49%
1
16.67%
Denis V. Lunev
3
3.30%
1
16.67%
Wang Chen
3
3.30%
1
16.67%
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91
100.00%
6
100.00%

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


void vlan_proc_rem_dev(struct net_device *vlandev)
{
	/** NOTE:  This will consume the memory pointed to by dent, it seems. */
	proc_remove(vlan_dev_priv(vlandev)->dent);
	vlan_dev_priv(vlandev)->dent = NULL;
}

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Zhang Shengju
1
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30
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/****** Proc filesystem entry points ****************************************/

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

/* start read of /proc/net/vlan/config */

static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
	
__acquires(rcu)
{
	struct net_device *dev;
	struct net *net = seq_file_net(seq);
	loff_t i = 1;

	rcu_read_lock();
	if (*pos == 0)
		return SEQ_START_TOKEN;

	for_each_netdev_rcu(net, dev) {
		if (!is_vlan_dev(dev))
			continue;

		if (i++ == *pos)
			return dev;
	}

	return  NULL;
}

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27
32.14%
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Linus Torvalds
22
26.19%
1
14.29%
Eric W. Biedermann
1
1.19%
1
14.29%
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7
100.00%



static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct net_device *dev;
	struct net *net = seq_file_net(seq);

	++*pos;

	dev = v;
	if (v == SEQ_START_TOKEN)
		dev = net_device_entry(&net->dev_base_head);

	for_each_netdev_continue_rcu(net, dev) {
		if (!is_vlan_dev(dev))
			continue;

		return dev;
	}

	return NULL;
}

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22
26.83%
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28.57%
Linus Torvalds
4
4.88%
1
14.29%
Oleg Drokin
2
2.44%
1
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Eric W. Biedermann
1
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100.00%


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

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static int vlan_seq_show(struct seq_file *seq, void *v)
{
	struct net *net = seq_file_net(seq);
	struct vlan_net *vn = net_generic(net, vlan_net_id);

	if (v == SEQ_START_TOKEN) {
		const char *nmtype = NULL;

		seq_puts(seq, "VLAN Dev name   | VLAN ID\n");

		if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
		    nmtype =  vlan_name_type_str[vn->name_type];

		seq_printf(seq, "Name-Type: %s\n",
			   nmtype ? nmtype :  "UNKNOWN");
	} else {
		const struct net_device *vlandev = v;
		const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);

		seq_printf(seq, "%-15s| %d  | %s\n",  vlandev->name,
			   vlan->vlan_id,    vlan->real_dev->name);
	}
	return 0;
}

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51
36.96%
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Pavel Emelyanov
28
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1
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Jiri Pirko
5
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David S. Miller
1
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static int vlandev_seq_show(struct seq_file *seq, void *offset)
{
	struct net_device *vlandev = (struct net_device *) seq->private;
	const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
	struct rtnl_link_stats64 temp;
	const struct rtnl_link_stats64 *stats;
	static const char fmt64[] = "%30s %12llu\n";
	int i;

	if (!is_vlan_dev(vlandev))
		return 0;

	stats = dev_get_stats(vlandev, &temp);
	seq_printf(seq,
		   "%s  VID: %d     REORDER_HDR: %i  dev->priv_flags: %hx\n",
		   vlandev->name, vlan->vlan_id,
		   (int)(vlan->flags & 1), vlandev->priv_flags);

	seq_printf(seq, fmt64, "total frames received", stats->rx_packets);
	seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes);
	seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast);
	seq_puts(seq, "\n");
	seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets);
	seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes);
	seq_printf(seq, "Device: %s", vlan->real_dev->name);
	/* now show all PRIORITY mappings relating to this VLAN */
	seq_printf(seq, "\nINGRESS priority mappings: "
			"0:%u  1:%u  2:%u  3:%u  4:%u  5:%u  6:%u 7:%u\n",
		   vlan->ingress_priority_map[0],
		   vlan->ingress_priority_map[1],
		   vlan->ingress_priority_map[2],
		   vlan->ingress_priority_map[3],
		   vlan->ingress_priority_map[4],
		   vlan->ingress_priority_map[5],
		   vlan->ingress_priority_map[6],
		   vlan->ingress_priority_map[7]);

	seq_printf(seq, " EGRESS priority mappings: ");
	for (i = 0; i < 16; i++) {
		const struct vlan_priority_tci_mapping *mp
			= vlan->egress_priority_map[i];
		while (mp) {
			seq_printf(seq, "%u:%hu ",
				   mp->priority, ((mp->vlan_qos >> 13) & 0x7));
			mp = mp->next;
		}
	}
	seq_puts(seq, "\n");

	return 0;
}
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239
69.88%
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55
16.08%
1
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Eric Dumazet
15
4.39%
2
20.00%
Jiri Pirko
15
4.39%
1
10.00%
Ben Hutchings
11
3.22%
1
10.00%
Patrick McHardy
3
0.88%
2
20.00%
Joonwoo Park
3
0.88%
1
10.00%
Wagner Ferenc
1
0.29%
1
10.00%
Total
342
100.00%
10
100.00%

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44.02%
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2.50%
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371
28.80%
3
7.50%
Pavel Emelyanov
196
15.22%
5
12.50%
Jiri Pirko
27
2.10%
1
2.50%
Patrick McHardy
17
1.32%
3
7.50%
Américo Wang
16
1.24%
1
2.50%
Eric Dumazet
15
1.16%
2
5.00%
Hideaki Yoshifuji / 吉藤英明
12
0.93%
2
5.00%
Ben Hutchings
11
0.85%
1
2.50%
Rusty Russell
8
0.62%
1
2.50%
Joe Perches
8
0.62%
1
2.50%
Wang Chen
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0.54%
1
2.50%
Eric W. Biedermann
5
0.39%
2
5.00%
Gao Feng
5
0.39%
1
2.50%
David S. Miller
4
0.31%
2
5.00%
Denis V. Lunev
3
0.23%
1
2.50%
Joonwoo Park
3
0.23%
1
2.50%
Arjan van de Ven
2
0.16%
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2.50%
Oleg Drokin
2
0.16%
1
2.50%
Anatol Pomozov
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Jan Engelhardt
1
0.08%
1
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Philippe De Muyter
1
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Alexey Dobriyan
1
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1
2.50%
Lucas De Marchi
1
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1
2.50%
Al Viro
1
0.08%
1
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Zhang Shengju
1
0.08%
1
2.50%
Wagner Ferenc
1
0.08%
1
2.50%
David Howells
1
0.08%
1
2.50%
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1288
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40
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