aboutsummaryrefslogtreecommitdiffstats
path: root/net/8021q/vlanproc.c
blob: daad0064e2c2457fdd7103fe909cdce2458f9056 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
/******************************************************************************
 * 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
 *****************************************************************************/

#include <linux/module.h>
#include <linux/stddef.h>	/* offsetof(), etc. */
#include <linux/errno.h>	/* return codes */
#include <linux/kernel.h>
#include <linux/slab.h>		/* kmalloc(), kfree() */
#include <linux/mm.h>
#include <linux/string.h>	/* inline mem*, str* functions */
#include <linux/init.h>		/* __initfunc et al. */
#include <asm/byteorder.h>	/* htons(), etc. */
#include <asm/uaccess.h>	/* copy_to_user */
#include <asm/io.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 folowing
 *	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));
}

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(inode)->data);
}

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 derectory entries.
 */

/* Strings */
static const char *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)
		proc_net_remove(net, name_root);

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

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

int 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("%s: can't create entry in proc filesystem!\n", __func__);
	vlan_proc_cleanup(net);
	return -ENOBUFS;
}

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

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

	dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
				     vn->proc_vlan_dir, &vlandev_fops);
	if (!dev_info->dent)
		return -ENOBUFS;

	dev_info->dent->data = vlandev;
	return 0;
}

/*
 *	Delete directory entry for VLAN device.
 */
int vlan_proc_rem_dev(struct net_device *vlandev)
{
	struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);

	/** NOTE:  This will consume the memory pointed to by dent, it seems. */
	if (vlan_dev_info(vlandev)->dent) {
		remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
				  vn->proc_vlan_dir);
		vlan_dev_info(vlandev)->dent = NULL;
	}
	return 0;
}

/****** 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(dev_base_lock)
{
	struct net_device *dev;
	struct net *net = seq_file_net(seq);
	loff_t i = 1;

	read_lock(&dev_base_lock);

	if (*pos == 0)
		return SEQ_START_TOKEN;

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

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

	return  NULL;
}

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

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

		return dev;
	}

	return NULL;
}

static void vlan_seq_stop(struct seq_file *seq, void *v)
	__releases(dev_base_lock)
{
	read_unlock(&dev_base_lock);
}

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_info *dev_info = vlan_dev_info(vlandev);

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

static int vlandev_seq_show(struct seq_file *seq, void *offset)
{
	struct net_device *vlandev = (struct net_device *) seq->private;
	const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
	struct net_device_stats *stats = &vlandev->stats;
	static const char fmt[] = "%30s %12lu\n";
	int i;

	if (!(vlandev->priv_flags & IFF_802_1Q_VLAN))
		return 0;

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

	seq_printf(seq, fmt, "total frames received", stats->rx_packets);
	seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
	seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
	seq_puts(seq, "\n");
	seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
	seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
	seq_printf(seq, fmt, "total headroom inc",
		   dev_info->cnt_inc_headroom_on_tx);
	seq_printf(seq, fmt, "total encap on xmit",
		   dev_info->cnt_encap_on_xmit);
	seq_printf(seq, "Device: %s", dev_info->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",
		   dev_info->ingress_priority_map[0],
		   dev_info->ingress_priority_map[1],
		   dev_info->ingress_priority_map[2],
		   dev_info->ingress_priority_map[3],
		   dev_info->ingress_priority_map[4],
		   dev_info->ingress_priority_map[5],
		   dev_info->ingress_priority_map[6],
		   dev_info->ingress_priority_map[7]);

	seq_printf(seq, "EGRESSS priority Mappings: ");
	for (i = 0; i < 16; i++) {
		const struct vlan_priority_tci_mapping *mp
			= dev_info->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;
}