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1// SPDX-License-Identifier: GPL-2.0-or-later
2/******************************************************************************
3 * vlanproc.c VLAN Module. /proc filesystem interface.
4 *
5 * This module is completely hardware-independent and provides
6 * access to the router using Linux /proc filesystem.
7 *
8 * Author: Ben Greear, <greearb@candelatech.com> coppied from wanproc.c
9 * by: Gene Kozin <genek@compuserve.com>
10 *
11 * Copyright: (c) 1998 Ben Greear
12 *
13 * ============================================================================
14 * Jan 20, 1998 Ben Greear Initial Version
15 *****************************************************************************/
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/module.h>
20#include <linux/errno.h>
21#include <linux/kernel.h>
22#include <linux/string.h>
23#include <linux/proc_fs.h>
24#include <linux/seq_file.h>
25#include <linux/fs.h>
26#include <linux/netdevice.h>
27#include <linux/if_vlan.h>
28#include <net/net_namespace.h>
29#include <net/netns/generic.h>
30#include "vlanproc.h"
31#include "vlan.h"
32
33/****** Function Prototypes *************************************************/
34
35/* Methods for preparing data for reading proc entries */
36static int vlan_seq_show(struct seq_file *seq, void *v);
37static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
38static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
39static void vlan_seq_stop(struct seq_file *seq, void *);
40static int vlandev_seq_show(struct seq_file *seq, void *v);
41
42/*
43 * Global Data
44 */
45
46
47/*
48 * Names of the proc directory entries
49 */
50
51static const char name_root[] = "vlan";
52static const char name_conf[] = "config";
53
54/*
55 * Structures for interfacing with the /proc filesystem.
56 * VLAN creates its own directory /proc/net/vlan with the following
57 * entries:
58 * config device status/configuration
59 * <device> entry for each device
60 */
61
62/*
63 * Generic /proc/net/vlan/<file> file and inode operations
64 */
65
66static const struct seq_operations vlan_seq_ops = {
67 .start = vlan_seq_start,
68 .next = vlan_seq_next,
69 .stop = vlan_seq_stop,
70 .show = vlan_seq_show,
71};
72
73/*
74 * Proc filesystem directory entries.
75 */
76
77/* Strings */
78static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
79 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID",
80 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
81 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
82 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID",
83};
84/*
85 * Interface functions
86 */
87
88/*
89 * Clean up /proc/net/vlan entries
90 */
91
92void vlan_proc_cleanup(struct net *net)
93{
94 struct vlan_net *vn = net_generic(net, vlan_net_id);
95
96 if (vn->proc_vlan_conf)
97 remove_proc_entry(name_conf, vn->proc_vlan_dir);
98
99 if (vn->proc_vlan_dir)
100 remove_proc_entry(name_root, net->proc_net);
101
102 /* Dynamically added entries should be cleaned up as their vlan_device
103 * is removed, so we should not have to take care of it here...
104 */
105}
106
107/*
108 * Create /proc/net/vlan entries
109 */
110
111int __net_init vlan_proc_init(struct net *net)
112{
113 struct vlan_net *vn = net_generic(net, vlan_net_id);
114
115 vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
116 if (!vn->proc_vlan_dir)
117 goto err;
118
119 vn->proc_vlan_conf = proc_create_net(name_conf, S_IFREG | 0600,
120 vn->proc_vlan_dir, &vlan_seq_ops,
121 sizeof(struct seq_net_private));
122 if (!vn->proc_vlan_conf)
123 goto err;
124 return 0;
125
126err:
127 pr_err("can't create entry in proc filesystem!\n");
128 vlan_proc_cleanup(net);
129 return -ENOBUFS;
130}
131
132/*
133 * Add directory entry for VLAN device.
134 */
135
136int vlan_proc_add_dev(struct net_device *vlandev)
137{
138 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
139 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
140
141 if (!strcmp(vlandev->name, name_conf))
142 return -EINVAL;
143 vlan->dent = proc_create_single_data(vlandev->name, S_IFREG | 0600,
144 vn->proc_vlan_dir, vlandev_seq_show, vlandev);
145 if (!vlan->dent)
146 return -ENOBUFS;
147 return 0;
148}
149
150/*
151 * Delete directory entry for VLAN device.
152 */
153void vlan_proc_rem_dev(struct net_device *vlandev)
154{
155 /** NOTE: This will consume the memory pointed to by dent, it seems. */
156 proc_remove(vlan_dev_priv(vlandev)->dent);
157 vlan_dev_priv(vlandev)->dent = NULL;
158}
159
160/****** Proc filesystem entry points ****************************************/
161
162/*
163 * The following few functions build the content of /proc/net/vlan/config
164 */
165
166/* start read of /proc/net/vlan/config */
167static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
168 __acquires(rcu)
169{
170 struct net_device *dev;
171 struct net *net = seq_file_net(seq);
172 loff_t i = 1;
173
174 rcu_read_lock();
175 if (*pos == 0)
176 return SEQ_START_TOKEN;
177
178 for_each_netdev_rcu(net, dev) {
179 if (!is_vlan_dev(dev))
180 continue;
181
182 if (i++ == *pos)
183 return dev;
184 }
185
186 return NULL;
187}
188
189static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
190{
191 struct net_device *dev;
192 struct net *net = seq_file_net(seq);
193
194 ++*pos;
195
196 dev = v;
197 if (v == SEQ_START_TOKEN)
198 dev = net_device_entry(&net->dev_base_head);
199
200 for_each_netdev_continue_rcu(net, dev) {
201 if (!is_vlan_dev(dev))
202 continue;
203
204 return dev;
205 }
206
207 return NULL;
208}
209
210static void vlan_seq_stop(struct seq_file *seq, void *v)
211 __releases(rcu)
212{
213 rcu_read_unlock();
214}
215
216static int vlan_seq_show(struct seq_file *seq, void *v)
217{
218 struct net *net = seq_file_net(seq);
219 struct vlan_net *vn = net_generic(net, vlan_net_id);
220
221 if (v == SEQ_START_TOKEN) {
222 const char *nmtype = NULL;
223
224 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
225
226 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
227 nmtype = vlan_name_type_str[vn->name_type];
228
229 seq_printf(seq, "Name-Type: %s\n",
230 nmtype ? nmtype : "UNKNOWN");
231 } else {
232 const struct net_device *vlandev = v;
233 const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
234
235 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
236 vlan->vlan_id, vlan->real_dev->name);
237 }
238 return 0;
239}
240
241static int vlandev_seq_show(struct seq_file *seq, void *offset)
242{
243 struct net_device *vlandev = (struct net_device *) seq->private;
244 const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
245 struct rtnl_link_stats64 temp;
246 const struct rtnl_link_stats64 *stats;
247 static const char fmt64[] = "%30s %12llu\n";
248 int i;
249
250 if (!is_vlan_dev(vlandev))
251 return 0;
252
253 stats = dev_get_stats(vlandev, &temp);
254 seq_printf(seq,
255 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
256 vlandev->name, vlan->vlan_id,
257 (int)(vlan->flags & 1), vlandev->priv_flags);
258
259 seq_printf(seq, fmt64, "total frames received", stats->rx_packets);
260 seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes);
261 seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast);
262 seq_puts(seq, "\n");
263 seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets);
264 seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes);
265 seq_printf(seq, "Device: %s", vlan->real_dev->name);
266 /* now show all PRIORITY mappings relating to this VLAN */
267 seq_printf(seq, "\nINGRESS priority mappings: "
268 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
269 vlan->ingress_priority_map[0],
270 vlan->ingress_priority_map[1],
271 vlan->ingress_priority_map[2],
272 vlan->ingress_priority_map[3],
273 vlan->ingress_priority_map[4],
274 vlan->ingress_priority_map[5],
275 vlan->ingress_priority_map[6],
276 vlan->ingress_priority_map[7]);
277
278 seq_printf(seq, " EGRESS priority mappings: ");
279 for (i = 0; i < 16; i++) {
280 const struct vlan_priority_tci_mapping *mp
281 = vlan->egress_priority_map[i];
282 while (mp) {
283 seq_printf(seq, "%u:%hu ",
284 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
285 mp = mp->next;
286 }
287 }
288 seq_puts(seq, "\n");
289
290 return 0;
291}
1/******************************************************************************
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
20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22#include <linux/module.h>
23#include <linux/errno.h>
24#include <linux/kernel.h>
25#include <linux/string.h>
26#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>
31#include <net/net_namespace.h>
32#include <net/netns/generic.h>
33#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/*
51 * Names of the proc directory entries
52 */
53
54static const char name_root[] = "vlan";
55static const char name_conf[] = "config";
56
57/*
58 * Structures for interfacing with the /proc filesystem.
59 * VLAN creates its own directory /proc/net/vlan with the following
60 * entries:
61 * config device status/configuration
62 * <device> entry for each device
63 */
64
65/*
66 * Generic /proc/net/vlan/<file> file and inode operations
67 */
68
69static const struct seq_operations vlan_seq_ops = {
70 .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{
78 return seq_open_net(inode, file, &vlan_seq_ops,
79 sizeof(struct seq_net_private));
80}
81
82static const struct file_operations vlan_fops = {
83 .open = vlan_seq_open,
84 .read = seq_read,
85 .llseek = seq_lseek,
86 .release = seq_release_net,
87};
88
89/*
90 * /proc/net/vlan/<device> file and inode operations
91 */
92
93static int vlandev_seq_open(struct inode *inode, struct file *file)
94{
95 return single_open(file, vlandev_seq_show, PDE_DATA(inode));
96}
97
98static const struct file_operations vlandev_fops = {
99 .open = vlandev_seq_open,
100 .read = seq_read,
101 .llseek = seq_lseek,
102 .release = single_release,
103};
104
105/*
106 * Proc filesystem directory entries.
107 */
108
109/* Strings */
110static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
111 [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",
115};
116/*
117 * Interface functions
118 */
119
120/*
121 * Clean up /proc/net/vlan entries
122 */
123
124void vlan_proc_cleanup(struct net *net)
125{
126 struct vlan_net *vn = net_generic(net, vlan_net_id);
127
128 if (vn->proc_vlan_conf)
129 remove_proc_entry(name_conf, vn->proc_vlan_dir);
130
131 if (vn->proc_vlan_dir)
132 remove_proc_entry(name_root, net->proc_net);
133
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
143int __net_init vlan_proc_init(struct net *net)
144{
145 struct vlan_net *vn = net_generic(net, vlan_net_id);
146
147 vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
148 if (!vn->proc_vlan_dir)
149 goto err;
150
151 vn->proc_vlan_conf = proc_create(name_conf, S_IFREG | 0600,
152 vn->proc_vlan_dir, &vlan_fops);
153 if (!vn->proc_vlan_conf)
154 goto err;
155 return 0;
156
157err:
158 pr_err("can't create entry in proc filesystem!\n");
159 vlan_proc_cleanup(net);
160 return -ENOBUFS;
161}
162
163/*
164 * Add directory entry for VLAN device.
165 */
166
167int vlan_proc_add_dev(struct net_device *vlandev)
168{
169 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
170 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
171
172 if (!strcmp(vlandev->name, name_conf))
173 return -EINVAL;
174 vlan->dent =
175 proc_create_data(vlandev->name, S_IFREG | 0600,
176 vn->proc_vlan_dir, &vlandev_fops, vlandev);
177 if (!vlan->dent)
178 return -ENOBUFS;
179 return 0;
180}
181
182/*
183 * Delete directory entry for VLAN device.
184 */
185void vlan_proc_rem_dev(struct net_device *vlandev)
186{
187 /** NOTE: This will consume the memory pointed to by dent, it seems. */
188 proc_remove(vlan_dev_priv(vlandev)->dent);
189 vlan_dev_priv(vlandev)->dent = NULL;
190}
191
192/****** Proc filesystem entry points ****************************************/
193
194/*
195 * The following few functions build the content of /proc/net/vlan/config
196 */
197
198/* start read of /proc/net/vlan/config */
199static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
200 __acquires(rcu)
201{
202 struct net_device *dev;
203 struct net *net = seq_file_net(seq);
204 loff_t i = 1;
205
206 rcu_read_lock();
207 if (*pos == 0)
208 return SEQ_START_TOKEN;
209
210 for_each_netdev_rcu(net, dev) {
211 if (!is_vlan_dev(dev))
212 continue;
213
214 if (i++ == *pos)
215 return dev;
216 }
217
218 return NULL;
219}
220
221static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
222{
223 struct net_device *dev;
224 struct net *net = seq_file_net(seq);
225
226 ++*pos;
227
228 dev = v;
229 if (v == SEQ_START_TOKEN)
230 dev = net_device_entry(&net->dev_base_head);
231
232 for_each_netdev_continue_rcu(net, dev) {
233 if (!is_vlan_dev(dev))
234 continue;
235
236 return dev;
237 }
238
239 return NULL;
240}
241
242static void vlan_seq_stop(struct seq_file *seq, void *v)
243 __releases(rcu)
244{
245 rcu_read_unlock();
246}
247
248static int vlan_seq_show(struct seq_file *seq, void *v)
249{
250 struct net *net = seq_file_net(seq);
251 struct vlan_net *vn = net_generic(net, vlan_net_id);
252
253 if (v == SEQ_START_TOKEN) {
254 const char *nmtype = NULL;
255
256 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
257
258 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
259 nmtype = vlan_name_type_str[vn->name_type];
260
261 seq_printf(seq, "Name-Type: %s\n",
262 nmtype ? nmtype : "UNKNOWN");
263 } else {
264 const struct net_device *vlandev = v;
265 const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
266
267 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
268 vlan->vlan_id, vlan->real_dev->name);
269 }
270 return 0;
271}
272
273static int vlandev_seq_show(struct seq_file *seq, void *offset)
274{
275 struct net_device *vlandev = (struct net_device *) seq->private;
276 const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
277 struct rtnl_link_stats64 temp;
278 const struct rtnl_link_stats64 *stats;
279 static const char fmt64[] = "%30s %12llu\n";
280 int i;
281
282 if (!is_vlan_dev(vlandev))
283 return 0;
284
285 stats = dev_get_stats(vlandev, &temp);
286 seq_printf(seq,
287 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
288 vlandev->name, vlan->vlan_id,
289 (int)(vlan->flags & 1), vlandev->priv_flags);
290
291 seq_printf(seq, fmt64, "total frames received", stats->rx_packets);
292 seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes);
293 seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast);
294 seq_puts(seq, "\n");
295 seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets);
296 seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes);
297 seq_printf(seq, "Device: %s", vlan->real_dev->name);
298 /* now show all PRIORITY mappings relating to this VLAN */
299 seq_printf(seq, "\nINGRESS priority mappings: "
300 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
301 vlan->ingress_priority_map[0],
302 vlan->ingress_priority_map[1],
303 vlan->ingress_priority_map[2],
304 vlan->ingress_priority_map[3],
305 vlan->ingress_priority_map[4],
306 vlan->ingress_priority_map[5],
307 vlan->ingress_priority_map[6],
308 vlan->ingress_priority_map[7]);
309
310 seq_printf(seq, " EGRESS priority mappings: ");
311 for (i = 0; i < 16; i++) {
312 const struct vlan_priority_tci_mapping *mp
313 = vlan->egress_priority_map[i];
314 while (mp) {
315 seq_printf(seq, "%u:%hu ",
316 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
317 mp = mp->next;
318 }
319 }
320 seq_puts(seq, "\n");
321
322 return 0;
323}