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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>
Patrick McHardy61362762008-07-14 22:51:55 -070021#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/kernel.h>
Patrick McHardy61362762008-07-14 22:51:55 -070023#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/proc_fs.h>
25#include <linux/seq_file.h>
26#include <linux/fs.h>
27#include <linux/netdevice.h>
28#include <linux/if_vlan.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020029#include <net/net_namespace.h>
Pavel Emelyanova59a8c12008-04-16 00:51:51 -070030#include <net/netns/generic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "vlanproc.h"
32#include "vlan.h"
33
34/****** Function Prototypes *************************************************/
35
36/* Methods for preparing data for reading proc entries */
37static int vlan_seq_show(struct seq_file *seq, void *v);
38static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
39static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
40static void vlan_seq_stop(struct seq_file *seq, void *);
41static int vlandev_seq_show(struct seq_file *seq, void *v);
42
43/*
44 * Global Data
45 */
46
47
48/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090049 * Names of the proc directory entries
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 */
51
52static const char name_root[] = "vlan";
53static const char name_conf[] = "config";
54
55/*
56 * Structures for interfacing with the /proc filesystem.
57 * VLAN creates its own directory /proc/net/vlan with the folowing
58 * entries:
59 * config device status/configuration
60 * <device> entry for each device
61 */
62
63/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090064 * Generic /proc/net/vlan/<file> file and inode operations
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 */
66
Philippe De Muyter56b3d972007-07-10 23:07:31 -070067static const struct seq_operations vlan_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 .start = vlan_seq_start,
69 .next = vlan_seq_next,
70 .stop = vlan_seq_stop,
71 .show = vlan_seq_show,
72};
73
74static int vlan_seq_open(struct inode *inode, struct file *file)
75{
Pavel Emelyanov80de2d92008-04-16 00:52:24 -070076 return seq_open_net(inode, file, &vlan_seq_ops,
77 sizeof(struct seq_net_private));
Linus Torvalds1da177e2005-04-16 15:20:36 -070078}
79
Arjan van de Ven9a321442007-02-12 00:55:35 -080080static const struct file_operations vlan_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 .owner = THIS_MODULE,
82 .open = vlan_seq_open,
83 .read = seq_read,
84 .llseek = seq_lseek,
Pavel Emelyanov80de2d92008-04-16 00:52:24 -070085 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -070086};
87
88/*
89 * /proc/net/vlan/<device> file and inode operations
90 */
91
92static int vlandev_seq_open(struct inode *inode, struct file *file)
93{
94 return single_open(file, vlandev_seq_show, PDE(inode)->data);
95}
96
Arjan van de Ven9a321442007-02-12 00:55:35 -080097static const struct file_operations vlandev_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 .owner = THIS_MODULE,
99 .open = vlandev_seq_open,
100 .read = seq_read,
101 .llseek = seq_lseek,
102 .release = single_release,
103};
104
105/*
106 * Proc filesystem derectory entries.
107 */
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109/* Strings */
110static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
Patrick McHardy2029cc22008-01-21 00:26:41 -0800111 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID",
112 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
113 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
114 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115};
116/*
117 * Interface functions
118 */
119
120/*
121 * Clean up /proc/net/vlan entries
122 */
123
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700124void vlan_proc_cleanup(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700126 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700127
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700128 if (vn->proc_vlan_conf)
129 remove_proc_entry(name_conf, vn->proc_vlan_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700131 if (vn->proc_vlan_dir)
132 proc_net_remove(net, name_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134 /* Dynamically added entries should be cleaned up as their vlan_device
135 * is removed, so we should not have to take care of it here...
136 */
137}
138
139/*
140 * Create /proc/net/vlan entries
141 */
142
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700143int vlan_proc_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700145 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700146
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700147 vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
148 if (!vn->proc_vlan_dir)
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800149 goto err;
150
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700151 vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
152 vn->proc_vlan_dir, &vlan_fops);
153 if (!vn->proc_vlan_conf)
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800154 goto err;
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800155 return 0;
156
157err:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800158 pr_err("%s: can't create entry in proc filesystem!\n", __func__);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700159 vlan_proc_cleanup(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 return -ENOBUFS;
161}
162
163/*
164 * Add directory entry for VLAN device.
165 */
166
Patrick McHardy2029cc22008-01-21 00:26:41 -0800167int vlan_proc_add_dev(struct net_device *vlandev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800169 struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700170 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Denis V. Lunev1d3faa32008-05-02 04:09:11 -0700172 dev_info->dent =
173 proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
174 vn->proc_vlan_dir, &vlandev_fops, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 if (!dev_info->dent)
176 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 return 0;
178}
179
180/*
181 * Delete directory entry for VLAN device.
182 */
183int vlan_proc_rem_dev(struct net_device *vlandev)
184{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700185 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 /** NOTE: This will consume the memory pointed to by dent, it seems. */
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800188 if (vlan_dev_info(vlandev)->dent) {
Patrick McHardy2029cc22008-01-21 00:26:41 -0800189 remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700190 vn->proc_vlan_dir);
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800191 vlan_dev_info(vlandev)->dent = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 return 0;
194}
195
196/****** Proc filesystem entry points ****************************************/
197
198/*
199 * The following few functions build the content of /proc/net/vlan/config
200 */
201
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900202/* start read of /proc/net/vlan/config */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
Stephen Hemminger1402c852008-01-21 17:27:44 -0800204 __acquires(dev_base_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
206 struct net_device *dev;
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700207 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 loff_t i = 1;
209
210 read_lock(&dev_base_lock);
211
212 if (*pos == 0)
213 return SEQ_START_TOKEN;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900214
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700215 for_each_netdev(net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700216 if (!is_vlan_dev(dev))
217 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900218
Pavel Emelianov7562f872007-05-03 15:13:45 -0700219 if (i++ == *pos)
220 return dev;
221 }
222
223 return NULL;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900224}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
227{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700228 struct net_device *dev;
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700229 struct net *net = seq_file_net(seq);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 ++*pos;
232
Pavel Emelianov7562f872007-05-03 15:13:45 -0700233 dev = (struct net_device *)v;
234 if (v == SEQ_START_TOKEN)
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700235 dev = net_device_entry(&net->dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700236
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700237 for_each_netdev_continue(net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700238 if (!is_vlan_dev(dev))
239 continue;
240
241 return dev;
242 }
243
244 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245}
246
247static void vlan_seq_stop(struct seq_file *seq, void *v)
Stephen Hemminger1402c852008-01-21 17:27:44 -0800248 __releases(dev_base_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
250 read_unlock(&dev_base_lock);
251}
252
253static int vlan_seq_show(struct seq_file *seq, void *v)
254{
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700255 struct net *net = seq_file_net(seq);
256 struct vlan_net *vn = net_generic(net, vlan_net_id);
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 if (v == SEQ_START_TOKEN) {
259 const char *nmtype = NULL;
260
261 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
262
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700263 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
264 nmtype = vlan_name_type_str[vn->name_type];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900266 seq_printf(seq, "Name-Type: %s\n",
Patrick McHardy2029cc22008-01-21 00:26:41 -0800267 nmtype ? nmtype : "UNKNOWN");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 } else {
269 const struct net_device *vlandev = v;
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800270 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900272 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 dev_info->vlan_id, dev_info->real_dev->name);
274 }
275 return 0;
276}
277
278static int vlandev_seq_show(struct seq_file *seq, void *offset)
279{
280 struct net_device *vlandev = (struct net_device *) seq->private;
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800281 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Eric Dumazet450c4ea2009-05-18 00:35:38 +0000282 const struct net_device_stats *stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 static const char fmt[] = "%30s %12lu\n";
284 int i;
285
Joonwoo Park26a25232008-07-08 03:22:16 -0700286 if (!is_vlan_dev(vlandev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return 0;
288
Eric Dumazet450c4ea2009-05-18 00:35:38 +0000289 stats = dev_get_stats(vlandev);
Patrick McHardy2029cc22008-01-21 00:26:41 -0800290 seq_printf(seq,
291 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
292 vlandev->name, dev_info->vlan_id,
293 (int)(dev_info->flags & 1), vlandev->priv_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 seq_printf(seq, fmt, "total frames received", stats->rx_packets);
296 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
297 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
298 seq_puts(seq, "\n");
299 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
300 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900301 seq_printf(seq, fmt, "total headroom inc",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 dev_info->cnt_inc_headroom_on_tx);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900303 seq_printf(seq, fmt, "total encap on xmit",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 dev_info->cnt_encap_on_xmit);
305 seq_printf(seq, "Device: %s", dev_info->real_dev->name);
306 /* now show all PRIORITY mappings relating to this VLAN */
Patrick McHardy2029cc22008-01-21 00:26:41 -0800307 seq_printf(seq, "\nINGRESS priority mappings: "
308 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
309 dev_info->ingress_priority_map[0],
310 dev_info->ingress_priority_map[1],
311 dev_info->ingress_priority_map[2],
312 dev_info->ingress_priority_map[3],
313 dev_info->ingress_priority_map[4],
314 dev_info->ingress_priority_map[5],
315 dev_info->ingress_priority_map[6],
316 dev_info->ingress_priority_map[7]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
Ferenc Wagner309f7962008-11-10 13:37:40 -0800318 seq_printf(seq, " EGRESS priority mappings: ");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 for (i = 0; i < 16; i++) {
320 const struct vlan_priority_tci_mapping *mp
321 = dev_info->egress_priority_map[i];
322 while (mp) {
Patrick McHardy734423c2007-06-13 12:07:07 -0700323 seq_printf(seq, "%u:%hu ",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
325 mp = mp->next;
326 }
327 }
328 seq_puts(seq, "\n");
329
330 return 0;
331}