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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>
Pavel Emelyanova59a8c12008-04-16 00:51:51 -070037#include <net/netns/generic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "vlanproc.h"
39#include "vlan.h"
40
41/****** Function Prototypes *************************************************/
42
43/* Methods for preparing data for reading proc entries */
44static int vlan_seq_show(struct seq_file *seq, void *v);
45static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
46static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
47static void vlan_seq_stop(struct seq_file *seq, void *);
48static int vlandev_seq_show(struct seq_file *seq, void *v);
49
50/*
51 * Global Data
52 */
53
54
55/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090056 * Names of the proc directory entries
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 */
58
59static const char name_root[] = "vlan";
60static const char name_conf[] = "config";
61
62/*
63 * Structures for interfacing with the /proc filesystem.
64 * VLAN creates its own directory /proc/net/vlan with the folowing
65 * entries:
66 * config device status/configuration
67 * <device> entry for each device
68 */
69
70/*
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090071 * Generic /proc/net/vlan/<file> file and inode operations
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 */
73
Philippe De Muyter56b3d972007-07-10 23:07:31 -070074static const struct seq_operations vlan_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 .start = vlan_seq_start,
76 .next = vlan_seq_next,
77 .stop = vlan_seq_stop,
78 .show = vlan_seq_show,
79};
80
81static int vlan_seq_open(struct inode *inode, struct file *file)
82{
Pavel Emelyanov80de2d92008-04-16 00:52:24 -070083 return seq_open_net(inode, file, &vlan_seq_ops,
84 sizeof(struct seq_net_private));
Linus Torvalds1da177e2005-04-16 15:20:36 -070085}
86
Arjan van de Ven9a321442007-02-12 00:55:35 -080087static const struct file_operations vlan_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 .owner = THIS_MODULE,
89 .open = vlan_seq_open,
90 .read = seq_read,
91 .llseek = seq_lseek,
Pavel Emelyanov80de2d92008-04-16 00:52:24 -070092 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -070093};
94
95/*
96 * /proc/net/vlan/<device> file and inode operations
97 */
98
99static int vlandev_seq_open(struct inode *inode, struct file *file)
100{
101 return single_open(file, vlandev_seq_show, PDE(inode)->data);
102}
103
Arjan van de Ven9a321442007-02-12 00:55:35 -0800104static const struct file_operations vlandev_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 .owner = THIS_MODULE,
106 .open = vlandev_seq_open,
107 .read = seq_read,
108 .llseek = seq_lseek,
109 .release = single_release,
110};
111
112/*
113 * Proc filesystem derectory entries.
114 */
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116/* Strings */
117static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
Patrick McHardy2029cc22008-01-21 00:26:41 -0800118 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID",
119 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
120 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
121 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122};
123/*
124 * Interface functions
125 */
126
127/*
128 * Clean up /proc/net/vlan entries
129 */
130
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700131void vlan_proc_cleanup(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700133 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700134
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700135 if (vn->proc_vlan_conf)
136 remove_proc_entry(name_conf, vn->proc_vlan_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700138 if (vn->proc_vlan_dir)
139 proc_net_remove(net, name_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
141 /* Dynamically added entries should be cleaned up as their vlan_device
142 * is removed, so we should not have to take care of it here...
143 */
144}
145
146/*
147 * Create /proc/net/vlan entries
148 */
149
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700150int vlan_proc_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700152 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700153
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700154 vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
155 if (!vn->proc_vlan_dir)
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800156 goto err;
157
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700158 vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
159 vn->proc_vlan_dir, &vlan_fops);
160 if (!vn->proc_vlan_conf)
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800161 goto err;
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800162 return 0;
163
164err:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800165 pr_err("%s: can't create entry in proc filesystem!\n", __func__);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700166 vlan_proc_cleanup(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 return -ENOBUFS;
168}
169
170/*
171 * Add directory entry for VLAN device.
172 */
173
Patrick McHardy2029cc22008-01-21 00:26:41 -0800174int vlan_proc_add_dev(struct net_device *vlandev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800176 struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700177 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
Wang Chend45fba32008-02-28 14:14:58 -0800179 dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700180 vn->proc_vlan_dir, &vlandev_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 if (!dev_info->dent)
182 return -ENOBUFS;
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 dev_info->dent->data = vlandev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 return 0;
186}
187
188/*
189 * Delete directory entry for VLAN device.
190 */
191int vlan_proc_rem_dev(struct net_device *vlandev)
192{
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700193 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 /** NOTE: This will consume the memory pointed to by dent, it seems. */
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800196 if (vlan_dev_info(vlandev)->dent) {
Patrick McHardy2029cc22008-01-21 00:26:41 -0800197 remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
Pavel Emelyanova59a8c12008-04-16 00:51:51 -0700198 vn->proc_vlan_dir);
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800199 vlan_dev_info(vlandev)->dent = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 return 0;
202}
203
204/****** Proc filesystem entry points ****************************************/
205
206/*
207 * The following few functions build the content of /proc/net/vlan/config
208 */
209
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900210/* start read of /proc/net/vlan/config */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
Stephen Hemminger1402c852008-01-21 17:27:44 -0800212 __acquires(dev_base_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
214 struct net_device *dev;
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700215 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 loff_t i = 1;
217
218 read_lock(&dev_base_lock);
219
220 if (*pos == 0)
221 return SEQ_START_TOKEN;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900222
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700223 for_each_netdev(net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700224 if (!is_vlan_dev(dev))
225 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900226
Pavel Emelianov7562f872007-05-03 15:13:45 -0700227 if (i++ == *pos)
228 return dev;
229 }
230
231 return NULL;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900232}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
235{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700236 struct net_device *dev;
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700237 struct net *net = seq_file_net(seq);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 ++*pos;
240
Pavel Emelianov7562f872007-05-03 15:13:45 -0700241 dev = (struct net_device *)v;
242 if (v == SEQ_START_TOKEN)
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700243 dev = net_device_entry(&net->dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -0700244
Pavel Emelyanov80de2d92008-04-16 00:52:24 -0700245 for_each_netdev_continue(net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -0700246 if (!is_vlan_dev(dev))
247 continue;
248
249 return dev;
250 }
251
252 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253}
254
255static void vlan_seq_stop(struct seq_file *seq, void *v)
Stephen Hemminger1402c852008-01-21 17:27:44 -0800256 __releases(dev_base_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257{
258 read_unlock(&dev_base_lock);
259}
260
261static int vlan_seq_show(struct seq_file *seq, void *v)
262{
263 if (v == SEQ_START_TOKEN) {
264 const char *nmtype = NULL;
265
266 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
267
268 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str))
269 nmtype = vlan_name_type_str[vlan_name_type];
270
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900271 seq_printf(seq, "Name-Type: %s\n",
Patrick McHardy2029cc22008-01-21 00:26:41 -0800272 nmtype ? nmtype : "UNKNOWN");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 } else {
274 const struct net_device *vlandev = v;
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800275 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900277 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 dev_info->vlan_id, dev_info->real_dev->name);
279 }
280 return 0;
281}
282
283static int vlandev_seq_show(struct seq_file *seq, void *offset)
284{
285 struct net_device *vlandev = (struct net_device *) seq->private;
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800286 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
Patrick McHardy7bd38d72008-01-21 00:19:31 -0800287 struct net_device_stats *stats = &vlandev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 static const char fmt[] = "%30s %12lu\n";
289 int i;
290
Adrian Bunk16f30512007-08-14 17:39:43 -0700291 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 return 0;
293
Patrick McHardy2029cc22008-01-21 00:26:41 -0800294 seq_printf(seq,
295 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
296 vlandev->name, dev_info->vlan_id,
297 (int)(dev_info->flags & 1), vlandev->priv_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 seq_printf(seq, fmt, "total frames received", stats->rx_packets);
300 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
301 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
302 seq_puts(seq, "\n");
303 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
304 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900305 seq_printf(seq, fmt, "total headroom inc",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 dev_info->cnt_inc_headroom_on_tx);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900307 seq_printf(seq, fmt, "total encap on xmit",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 dev_info->cnt_encap_on_xmit);
309 seq_printf(seq, "Device: %s", dev_info->real_dev->name);
310 /* now show all PRIORITY mappings relating to this VLAN */
Patrick McHardy2029cc22008-01-21 00:26:41 -0800311 seq_printf(seq, "\nINGRESS priority mappings: "
312 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
313 dev_info->ingress_priority_map[0],
314 dev_info->ingress_priority_map[1],
315 dev_info->ingress_priority_map[2],
316 dev_info->ingress_priority_map[3],
317 dev_info->ingress_priority_map[4],
318 dev_info->ingress_priority_map[5],
319 dev_info->ingress_priority_map[6],
320 dev_info->ingress_priority_map[7]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322 seq_printf(seq, "EGRESSS priority Mappings: ");
323 for (i = 0; i < 16; i++) {
324 const struct vlan_priority_tci_mapping *mp
325 = dev_info->egress_priority_map[i];
326 while (mp) {
Patrick McHardy734423c2007-06-13 12:07:07 -0700327 seq_printf(seq, "%u:%hu ",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
329 mp = mp->next;
330 }
331 }
332 seq_puts(seq, "\n");
333
334 return 0;
335}