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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
Joe Perchesafab2d22011-05-26 10:58:31 +000020#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/module.h>
Patrick McHardy61362762008-07-14 22:51:55 -070023#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/kernel.h>
Patrick McHardy61362762008-07-14 22:51:55 -070025#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/proc_fs.h>
27#include <linux/seq_file.h>
28#include <linux/fs.h>
29#include <linux/netdevice.h>
30#include <linux/if_vlan.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020031#include <net/net_namespace.h>
Pavel Emelyanova59a8c12008-04-16 00:51:51 -070032#include <net/netns/generic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "vlanproc.h"
34#include "vlan.h"
35
36/****** Function Prototypes *************************************************/
37
38/* Methods for preparing data for reading proc entries */
39static int vlan_seq_show(struct seq_file *seq, void *v);
40static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
41static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
42static void vlan_seq_stop(struct seq_file *seq, void *);
43static int vlandev_seq_show(struct seq_file *seq, void *v);
44
45/*
46 * Global Data
47 */
48
49
50/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090051 * Names of the proc directory entries
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 */
53
54static const char name_root[] = "vlan";
55static const char name_conf[] = "config";
56
57/*
58 * Structures for interfacing with the /proc filesystem.
Lucas De Marchi25985ed2011-03-30 22:57:33 -030059 * VLAN creates its own directory /proc/net/vlan with the following
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 * entries:
61 * config device status/configuration
62 * <device> entry for each device
63 */
64
65/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090066 * Generic /proc/net/vlan/<file> file and inode operations
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 */
68
Philippe De Muyter56b3d972007-07-10 23:07:31 -070069static const struct seq_operations vlan_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 .start = vlan_seq_start,
71 .next = vlan_seq_next,
72 .stop = vlan_seq_stop,
73 .show = vlan_seq_show,
74};
75
76static int vlan_seq_open(struct inode *inode, struct file *file)
77{
Pavel Emelyanov80de2d92008-04-16 00:52:24 -070078 return seq_open_net(inode, file, &vlan_seq_ops,
79 sizeof(struct seq_net_private));
Linus Torvalds1da177e2005-04-16 15:20:36 -070080}
81
Arjan van de Ven9a321442007-02-12 00:55:35 -080082static const struct file_operations vlan_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 .owner = THIS_MODULE,
84 .open = vlan_seq_open,
85 .read = seq_read,
86 .llseek = seq_lseek,
Pavel Emelyanov80de2d92008-04-16 00:52:24 -070087 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -070088};
89
90/*
91 * /proc/net/vlan/<device> file and inode operations
92 */
93
94static int vlandev_seq_open(struct inode *inode, struct file *file)
95{
96 return single_open(file, vlandev_seq_show, PDE(inode)->data);
97}
98
Arjan van de Ven9a321442007-02-12 00:55:35 -080099static const struct file_operations vlandev_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 .owner = THIS_MODULE,
101 .open = vlandev_seq_open,
102 .read = seq_read,
103 .llseek = seq_lseek,
104 .release = single_release,
105};
106
107/*
108 * Proc filesystem derectory entries.
109 */
110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111/* Strings */
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700112static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
Patrick McHardy2029cc22008-01-21 00:26:41 -0800113 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID",
114 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
115 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
116 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117};
118/*
119 * Interface functions
120 */
121
122/*
123 * Clean up /proc/net/vlan entries
124 */
125
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700126void vlan_proc_cleanup(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700128 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700129
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700130 if (vn->proc_vlan_conf)
131 remove_proc_entry(name_conf, vn->proc_vlan_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700133 if (vn->proc_vlan_dir)
134 proc_net_remove(net, name_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
136 /* Dynamically added entries should be cleaned up as their vlan_device
137 * is removed, so we should not have to take care of it here...
138 */
139}
140
141/*
142 * Create /proc/net/vlan entries
143 */
144
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000145int __net_init vlan_proc_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700147 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700148
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700149 vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
150 if (!vn->proc_vlan_dir)
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800151 goto err;
152
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700153 vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
154 vn->proc_vlan_dir, &vlan_fops);
155 if (!vn->proc_vlan_conf)
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800156 goto err;
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800157 return 0;
158
159err:
Joe Perchesafab2d22011-05-26 10:58:31 +0000160 pr_err("can't create entry in proc filesystem!\n");
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700161 vlan_proc_cleanup(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 return -ENOBUFS;
163}
164
165/*
166 * Add directory entry for VLAN device.
167 */
168
Patrick McHardy2029cc22008-01-21 00:26:41 -0800169int vlan_proc_add_dev(struct net_device *vlandev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000171 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700172 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Jiri Pirko7da82c02011-12-08 04:11:15 +0000174 vlan->dent =
Denis V. Lunev1d3faa32008-05-02 04:09:11 -0700175 proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
176 vn->proc_vlan_dir, &vlandev_fops, vlandev);
Jiri Pirko7da82c02011-12-08 04:11:15 +0000177 if (!vlan->dent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 return 0;
180}
181
182/*
183 * Delete directory entry for VLAN device.
184 */
185int vlan_proc_rem_dev(struct net_device *vlandev)
186{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700187 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 /** NOTE: This will consume the memory pointed to by dent, it seems. */
Jiri Pirko7da82c02011-12-08 04:11:15 +0000190 if (vlan_dev_priv(vlandev)->dent) {
191 remove_proc_entry(vlan_dev_priv(vlandev)->dent->name,
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700192 vn->proc_vlan_dir);
Jiri Pirko7da82c02011-12-08 04:11:15 +0000193 vlan_dev_priv(vlandev)->dent = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 return 0;
196}
197
198/****** Proc filesystem entry points ****************************************/
199
200/*
201 * The following few functions build the content of /proc/net/vlan/config
202 */
203
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900204/* start read of /proc/net/vlan/config */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
stephen hemminger9e067592009-11-10 07:54:48 +0000206 __acquires(rcu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
208 struct net_device *dev;
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700209 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 loff_t i = 1;
211
stephen hemminger9e067592009-11-10 07:54:48 +0000212 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 if (*pos == 0)
214 return SEQ_START_TOKEN;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900215
stephen hemminger9e067592009-11-10 07:54:48 +0000216 for_each_netdev_rcu(net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700217 if (!is_vlan_dev(dev))
218 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900219
Pavel Emelianov7562f872007-05-03 15:13:45 -0700220 if (i++ == *pos)
221 return dev;
222 }
223
224 return NULL;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900225}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
228{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700229 struct net_device *dev;
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700230 struct net *net = seq_file_net(seq);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 ++*pos;
233
Joe Perchesea110732011-06-13 16:21:26 +0000234 dev = v;
Pavel Emelianov7562f872007-05-03 15:13:45 -0700235 if (v == SEQ_START_TOKEN)
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700236 dev = net_device_entry(&net->dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700237
stephen hemminger9e067592009-11-10 07:54:48 +0000238 for_each_netdev_continue_rcu(net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700239 if (!is_vlan_dev(dev))
240 continue;
241
242 return dev;
243 }
244
245 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
248static void vlan_seq_stop(struct seq_file *seq, void *v)
stephen hemminger9e067592009-11-10 07:54:48 +0000249 __releases(rcu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250{
stephen hemminger9e067592009-11-10 07:54:48 +0000251 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252}
253
254static int vlan_seq_show(struct seq_file *seq, void *v)
255{
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700256 struct net *net = seq_file_net(seq);
257 struct vlan_net *vn = net_generic(net, vlan_net_id);
258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 if (v == SEQ_START_TOKEN) {
260 const char *nmtype = NULL;
261
262 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
263
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700264 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
265 nmtype = vlan_name_type_str[vn->name_type];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900267 seq_printf(seq, "Name-Type: %s\n",
Patrick McHardy2029cc22008-01-21 00:26:41 -0800268 nmtype ? nmtype : "UNKNOWN");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 } else {
270 const struct net_device *vlandev = v;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000271 const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900273 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
Jiri Pirko7da82c02011-12-08 04:11:15 +0000274 vlan->vlan_id, vlan->real_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 }
276 return 0;
277}
278
279static int vlandev_seq_show(struct seq_file *seq, void *offset)
280{
281 struct net_device *vlandev = (struct net_device *) seq->private;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000282 const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
Eric Dumazet28172732010-07-07 14:58:56 -0700283 struct rtnl_link_stats64 temp;
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000284 const struct rtnl_link_stats64 *stats;
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000285 static const char fmt64[] = "%30s %12llu\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 int i;
287
Joonwoo Park26a25232008-07-08 03:22:16 -0700288 if (!is_vlan_dev(vlandev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 return 0;
290
Eric Dumazet28172732010-07-07 14:58:56 -0700291 stats = dev_get_stats(vlandev, &temp);
Patrick McHardy2029cc22008-01-21 00:26:41 -0800292 seq_printf(seq,
293 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
Jiri Pirko7da82c02011-12-08 04:11:15 +0000294 vlandev->name, vlan->vlan_id,
295 (int)(vlan->flags & 1), vlandev->priv_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000297 seq_printf(seq, fmt64, "total frames received", stats->rx_packets);
298 seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes);
299 seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 seq_puts(seq, "\n");
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000301 seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets);
302 seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes);
Jiri Pirko7da82c02011-12-08 04:11:15 +0000303 seq_printf(seq, "Device: %s", vlan->real_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 /* now show all PRIORITY mappings relating to this VLAN */
Patrick McHardy2029cc22008-01-21 00:26:41 -0800305 seq_printf(seq, "\nINGRESS priority mappings: "
306 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
Jiri Pirko7da82c02011-12-08 04:11:15 +0000307 vlan->ingress_priority_map[0],
308 vlan->ingress_priority_map[1],
309 vlan->ingress_priority_map[2],
310 vlan->ingress_priority_map[3],
311 vlan->ingress_priority_map[4],
312 vlan->ingress_priority_map[5],
313 vlan->ingress_priority_map[6],
314 vlan->ingress_priority_map[7]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
Ferenc Wagner309f7962008-11-10 13:37:40 -0800316 seq_printf(seq, " EGRESS priority mappings: ");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 for (i = 0; i < 16; i++) {
318 const struct vlan_priority_tci_mapping *mp
Jiri Pirko7da82c02011-12-08 04:11:15 +0000319 = vlan->egress_priority_map[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 while (mp) {
Patrick McHardy734423c2007-06-13 12:07:07 -0700321 seq_printf(seq, "%u:%hu ",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
323 mp = mp->next;
324 }
325 }
326 seq_puts(seq, "\n");
327
328 return 0;
329}