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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] = {
Patrick McHardy2029cc22008-01-21 00:26:41 -0800128 [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",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132};
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);
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800161 if (!proc_vlan_dir)
162 goto err;
163
Wang Chend45fba32008-02-28 14:14:58 -0800164 proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
165 proc_vlan_dir, &vlan_fops);
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800166 if (!proc_vlan_conf)
167 goto err;
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800168 return 0;
169
170err:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800171 pr_err("%s: can't create entry in proc filesystem!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 vlan_proc_cleanup();
173 return -ENOBUFS;
174}
175
176/*
177 * Add directory entry for VLAN device.
178 */
179
Patrick McHardy2029cc22008-01-21 00:26:41 -0800180int vlan_proc_add_dev(struct net_device *vlandev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800182 struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Wang Chend45fba32008-02-28 14:14:58 -0800184 dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
185 proc_vlan_dir, &vlandev_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 if (!dev_info->dent)
187 return -ENOBUFS;
188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 dev_info->dent->data = vlandev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 return 0;
191}
192
193/*
194 * Delete directory entry for VLAN device.
195 */
196int vlan_proc_rem_dev(struct net_device *vlandev)
197{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 /** NOTE: This will consume the memory pointed to by dent, it seems. */
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800199 if (vlan_dev_info(vlandev)->dent) {
Patrick McHardy2029cc22008-01-21 00:26:41 -0800200 remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
201 proc_vlan_dir);
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800202 vlan_dev_info(vlandev)->dent = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 return 0;
205}
206
207/****** Proc filesystem entry points ****************************************/
208
209/*
210 * The following few functions build the content of /proc/net/vlan/config
211 */
212
Pavel Emelianov7562f872007-05-03 15:13:45 -0700213static inline int is_vlan_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700215 return dev->priv_flags & IFF_802_1Q_VLAN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900218/* start read of /proc/net/vlan/config */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
Stephen Hemminger1402c852008-01-21 17:27:44 -0800220 __acquires(dev_base_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221{
222 struct net_device *dev;
223 loff_t i = 1;
224
225 read_lock(&dev_base_lock);
226
227 if (*pos == 0)
228 return SEQ_START_TOKEN;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900229
Eric W. Biederman881d9662007-09-17 11:56:21 -0700230 for_each_netdev(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700231 if (!is_vlan_dev(dev))
232 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900233
Pavel Emelianov7562f872007-05-03 15:13:45 -0700234 if (i++ == *pos)
235 return dev;
236 }
237
238 return NULL;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900239}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
242{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700243 struct net_device *dev;
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 ++*pos;
246
Pavel Emelianov7562f872007-05-03 15:13:45 -0700247 dev = (struct net_device *)v;
248 if (v == SEQ_START_TOKEN)
Eric W. Biederman881d9662007-09-17 11:56:21 -0700249 dev = net_device_entry(&init_net.dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700250
Eric W. Biederman881d9662007-09-17 11:56:21 -0700251 for_each_netdev_continue(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700252 if (!is_vlan_dev(dev))
253 continue;
254
255 return dev;
256 }
257
258 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259}
260
261static void vlan_seq_stop(struct seq_file *seq, void *v)
Stephen Hemminger1402c852008-01-21 17:27:44 -0800262 __releases(dev_base_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263{
264 read_unlock(&dev_base_lock);
265}
266
267static int vlan_seq_show(struct seq_file *seq, void *v)
268{
269 if (v == SEQ_START_TOKEN) {
270 const char *nmtype = NULL;
271
272 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
273
274 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str))
275 nmtype = vlan_name_type_str[vlan_name_type];
276
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900277 seq_printf(seq, "Name-Type: %s\n",
Patrick McHardy2029cc22008-01-21 00:26:41 -0800278 nmtype ? nmtype : "UNKNOWN");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 } else {
280 const struct net_device *vlandev = v;
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800281 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900283 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 dev_info->vlan_id, dev_info->real_dev->name);
285 }
286 return 0;
287}
288
289static int vlandev_seq_show(struct seq_file *seq, void *offset)
290{
291 struct net_device *vlandev = (struct net_device *) seq->private;
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800292 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Patrick McHardy7bd38d72008-01-21 00:19:31 -0800293 struct net_device_stats *stats = &vlandev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 static const char fmt[] = "%30s %12lu\n";
295 int i;
296
Adrian Bunk16f30512007-08-14 17:39:43 -0700297 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 return 0;
299
Patrick McHardy2029cc22008-01-21 00:26:41 -0800300 seq_printf(seq,
301 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
302 vlandev->name, dev_info->vlan_id,
303 (int)(dev_info->flags & 1), vlandev->priv_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 seq_printf(seq, fmt, "total frames received", stats->rx_packets);
306 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
307 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
308 seq_puts(seq, "\n");
309 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
310 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900311 seq_printf(seq, fmt, "total headroom inc",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 dev_info->cnt_inc_headroom_on_tx);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900313 seq_printf(seq, fmt, "total encap on xmit",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 dev_info->cnt_encap_on_xmit);
315 seq_printf(seq, "Device: %s", dev_info->real_dev->name);
316 /* now show all PRIORITY mappings relating to this VLAN */
Patrick McHardy2029cc22008-01-21 00:26:41 -0800317 seq_printf(seq, "\nINGRESS priority mappings: "
318 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
319 dev_info->ingress_priority_map[0],
320 dev_info->ingress_priority_map[1],
321 dev_info->ingress_priority_map[2],
322 dev_info->ingress_priority_map[3],
323 dev_info->ingress_priority_map[4],
324 dev_info->ingress_priority_map[5],
325 dev_info->ingress_priority_map[6],
326 dev_info->ingress_priority_map[7]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328 seq_printf(seq, "EGRESSS priority Mappings: ");
329 for (i = 0; i < 16; i++) {
330 const struct vlan_priority_tci_mapping *mp
331 = dev_info->egress_priority_map[i];
332 while (mp) {
Patrick McHardy734423c2007-06-13 12:07:07 -0700333 seq_printf(seq, "%u:%hu ",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
335 mp = mp->next;
336 }
337 }
338 seq_puts(seq, "\n");
339
340 return 0;
341}