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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 * vlanproc.c VLAN Module. /proc filesystem interface.
3 *
4 * This module is completely hardware-independent and provides
5 * access to the router using Linux /proc filesystem.
6 *
7 * Author: Ben Greear, <greearb@candelatech.com> coppied from wanproc.c
8 * by: Gene Kozin <genek@compuserve.com>
9 *
10 * Copyright: (c) 1998 Ben Greear
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 * ============================================================================
17 * Jan 20, 1998 Ben Greear Initial Version
18 *****************************************************************************/
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/module.h>
21#include <linux/stddef.h> /* offsetof(), etc. */
22#include <linux/errno.h> /* return codes */
23#include <linux/kernel.h>
24#include <linux/slab.h> /* kmalloc(), kfree() */
Jesper Juhle49332b2005-05-01 08:59:08 -070025#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/string.h> /* inline mem*, str* functions */
27#include <linux/init.h> /* __initfunc et al. */
28#include <asm/byteorder.h> /* htons(), etc. */
29#include <asm/uaccess.h> /* copy_to_user */
30#include <asm/io.h>
31#include <linux/proc_fs.h>
32#include <linux/seq_file.h>
33#include <linux/fs.h>
34#include <linux/netdevice.h>
35#include <linux/if_vlan.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020036#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include "vlanproc.h"
38#include "vlan.h"
39
40/****** Function Prototypes *************************************************/
41
42/* Methods for preparing data for reading proc entries */
43static int vlan_seq_show(struct seq_file *seq, void *v);
44static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
45static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
46static void vlan_seq_stop(struct seq_file *seq, void *);
47static int vlandev_seq_show(struct seq_file *seq, void *v);
48
49/*
50 * Global Data
51 */
52
53
54/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090055 * Names of the proc directory entries
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 */
57
58static const char name_root[] = "vlan";
59static const char name_conf[] = "config";
60
61/*
62 * Structures for interfacing with the /proc filesystem.
63 * VLAN creates its own directory /proc/net/vlan with the folowing
64 * entries:
65 * config device status/configuration
66 * <device> entry for each device
67 */
68
69/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090070 * Generic /proc/net/vlan/<file> file and inode operations
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 */
72
Philippe De Muyter56b3d972007-07-10 23:07:31 -070073static const struct seq_operations vlan_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 .start = vlan_seq_start,
75 .next = vlan_seq_next,
76 .stop = vlan_seq_stop,
77 .show = vlan_seq_show,
78};
79
80static int vlan_seq_open(struct inode *inode, struct file *file)
81{
82 return seq_open(file, &vlan_seq_ops);
83}
84
Arjan van de Ven9a321442007-02-12 00:55:35 -080085static const struct file_operations vlan_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 .owner = THIS_MODULE,
87 .open = vlan_seq_open,
88 .read = seq_read,
89 .llseek = seq_lseek,
90 .release = seq_release,
91};
92
93/*
94 * /proc/net/vlan/<device> file and inode operations
95 */
96
97static int vlandev_seq_open(struct inode *inode, struct file *file)
98{
99 return single_open(file, vlandev_seq_show, PDE(inode)->data);
100}
101
Arjan van de Ven9a321442007-02-12 00:55:35 -0800102static const struct file_operations vlandev_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 .owner = THIS_MODULE,
104 .open = vlandev_seq_open,
105 .read = seq_read,
106 .llseek = seq_lseek,
107 .release = single_release,
108};
109
110/*
111 * Proc filesystem derectory entries.
112 */
113
114/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900115 * /proc/net/vlan
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 */
117
118static struct proc_dir_entry *proc_vlan_dir;
119
120/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900121 * /proc/net/vlan/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 */
123
124static struct proc_dir_entry *proc_vlan_conf;
125
126/* Strings */
127static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
128 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID",
129 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
130 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD]= "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
131 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID",
132};
133/*
134 * Interface functions
135 */
136
137/*
138 * Clean up /proc/net/vlan entries
139 */
140
141void vlan_proc_cleanup(void)
142{
143 if (proc_vlan_conf)
144 remove_proc_entry(name_conf, proc_vlan_dir);
145
146 if (proc_vlan_dir)
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200147 proc_net_remove(&init_net, name_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149 /* Dynamically added entries should be cleaned up as their vlan_device
150 * is removed, so we should not have to take care of it here...
151 */
152}
153
154/*
155 * Create /proc/net/vlan entries
156 */
157
158int __init vlan_proc_init(void)
159{
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200160 proc_vlan_dir = proc_mkdir(name_root, init_net.proc_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 if (proc_vlan_dir) {
162 proc_vlan_conf = create_proc_entry(name_conf,
163 S_IFREG|S_IRUSR|S_IWUSR,
164 proc_vlan_dir);
165 if (proc_vlan_conf) {
166 proc_vlan_conf->proc_fops = &vlan_fops;
167 return 0;
168 }
169 }
170 vlan_proc_cleanup();
171 return -ENOBUFS;
172}
173
174/*
175 * Add directory entry for VLAN device.
176 */
177
178int vlan_proc_add_dev (struct net_device *vlandev)
179{
180 struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
181
182 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
183 printk(KERN_ERR
184 "ERROR: vlan_proc_add, device -:%s:- is NOT a VLAN\n",
185 vlandev->name);
186 return -EINVAL;
187 }
188
189 dev_info->dent = create_proc_entry(vlandev->name,
190 S_IFREG|S_IRUSR|S_IWUSR,
191 proc_vlan_dir);
192 if (!dev_info->dent)
193 return -ENOBUFS;
194
195 dev_info->dent->proc_fops = &vlandev_fops;
196 dev_info->dent->data = vlandev;
197
198#ifdef VLAN_DEBUG
199 printk(KERN_ERR "vlan_proc_add, device -:%s:- being added.\n",
200 vlandev->name);
201#endif
202 return 0;
203}
204
205/*
206 * Delete directory entry for VLAN device.
207 */
208int vlan_proc_rem_dev(struct net_device *vlandev)
209{
210 if (!vlandev) {
211 printk(VLAN_ERR "%s: invalid argument: %p\n",
212 __FUNCTION__, vlandev);
213 return -EINVAL;
214 }
215
216 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
217 printk(VLAN_DBG "%s: invalid argument, device: %s is not a VLAN device, priv_flags: 0x%4hX.\n",
218 __FUNCTION__, vlandev->name, vlandev->priv_flags);
219 return -EINVAL;
220 }
221
222#ifdef VLAN_DEBUG
223 printk(VLAN_DBG "%s: dev: %p\n", __FUNCTION__, vlandev);
224#endif
225
226 /** NOTE: This will consume the memory pointed to by dent, it seems. */
227 if (VLAN_DEV_INFO(vlandev)->dent) {
228 remove_proc_entry(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir);
229 VLAN_DEV_INFO(vlandev)->dent = NULL;
230 }
231
232 return 0;
233}
234
235/****** Proc filesystem entry points ****************************************/
236
237/*
238 * The following few functions build the content of /proc/net/vlan/config
239 */
240
Pavel Emelianov7562f872007-05-03 15:13:45 -0700241static inline int is_vlan_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700243 return dev->priv_flags & IFF_802_1Q_VLAN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244}
245
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900246/* start read of /proc/net/vlan/config */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
248{
249 struct net_device *dev;
250 loff_t i = 1;
251
252 read_lock(&dev_base_lock);
253
254 if (*pos == 0)
255 return SEQ_START_TOKEN;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900256
Eric W. Biederman881d9662007-09-17 11:56:21 -0700257 for_each_netdev(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700258 if (!is_vlan_dev(dev))
259 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900260
Pavel Emelianov7562f872007-05-03 15:13:45 -0700261 if (i++ == *pos)
262 return dev;
263 }
264
265 return NULL;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900266}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
269{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700270 struct net_device *dev;
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 ++*pos;
273
Pavel Emelianov7562f872007-05-03 15:13:45 -0700274 dev = (struct net_device *)v;
275 if (v == SEQ_START_TOKEN)
Eric W. Biederman881d9662007-09-17 11:56:21 -0700276 dev = net_device_entry(&init_net.dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700277
Eric W. Biederman881d9662007-09-17 11:56:21 -0700278 for_each_netdev_continue(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700279 if (!is_vlan_dev(dev))
280 continue;
281
282 return dev;
283 }
284
285 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286}
287
288static void vlan_seq_stop(struct seq_file *seq, void *v)
289{
290 read_unlock(&dev_base_lock);
291}
292
293static int vlan_seq_show(struct seq_file *seq, void *v)
294{
295 if (v == SEQ_START_TOKEN) {
296 const char *nmtype = NULL;
297
298 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
299
300 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str))
301 nmtype = vlan_name_type_str[vlan_name_type];
302
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900303 seq_printf(seq, "Name-Type: %s\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 nmtype ? nmtype : "UNKNOWN" );
305 } else {
306 const struct net_device *vlandev = v;
307 const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
308
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900309 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 dev_info->vlan_id, dev_info->real_dev->name);
311 }
312 return 0;
313}
314
315static int vlandev_seq_show(struct seq_file *seq, void *offset)
316{
317 struct net_device *vlandev = (struct net_device *) seq->private;
318 const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
319 struct net_device_stats *stats;
320 static const char fmt[] = "%30s %12lu\n";
321 int i;
322
Adrian Bunk16f30512007-08-14 17:39:43 -0700323 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 return 0;
325
326 seq_printf(seq, "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
327 vlandev->name, dev_info->vlan_id,
328 (int)(dev_info->flags & 1), vlandev->priv_flags);
329
330
331 stats = vlan_dev_get_stats(vlandev);
332
333 seq_printf(seq, fmt, "total frames received", stats->rx_packets);
334 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
335 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
336 seq_puts(seq, "\n");
337 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
338 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900339 seq_printf(seq, fmt, "total headroom inc",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 dev_info->cnt_inc_headroom_on_tx);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900341 seq_printf(seq, fmt, "total encap on xmit",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 dev_info->cnt_encap_on_xmit);
343 seq_printf(seq, "Device: %s", dev_info->real_dev->name);
344 /* now show all PRIORITY mappings relating to this VLAN */
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900345 seq_printf(seq,
Patrick McHardy734423c2007-06-13 12:07:07 -0700346 "\nINGRESS priority mappings: 0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 dev_info->ingress_priority_map[0],
348 dev_info->ingress_priority_map[1],
349 dev_info->ingress_priority_map[2],
350 dev_info->ingress_priority_map[3],
351 dev_info->ingress_priority_map[4],
352 dev_info->ingress_priority_map[5],
353 dev_info->ingress_priority_map[6],
354 dev_info->ingress_priority_map[7]);
355
356 seq_printf(seq, "EGRESSS priority Mappings: ");
357 for (i = 0; i < 16; i++) {
358 const struct vlan_priority_tci_mapping *mp
359 = dev_info->egress_priority_map[i];
360 while (mp) {
Patrick McHardy734423c2007-06-13 12:07:07 -0700361 seq_printf(seq, "%u:%hu ",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
363 mp = mp->next;
364 }
365 }
366 seq_puts(seq, "\n");
367
368 return 0;
369}