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 #include <linux/module.h>
21 #include <linux/errno.h>
22 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #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>
29 #include <net/net_namespace.h>
30 #include <net/netns/generic.h>
31 #include "vlanproc.h"
32 #include "vlan.h"
33
34 /****** Function Prototypes *************************************************/
35
36 /* Methods for preparing data for reading proc entries */
37 static int vlan_seq_show(struct seq_file *seq, void *v);
38 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
39 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
40 static void vlan_seq_stop(struct seq_file *seq, void *);
41 static int vlandev_seq_show(struct seq_file *seq, void *v);
42
43 /*
44 * Global Data
45 */
46
47
48 /*
49 * Names of the proc directory entries
50 */
51
52 static const char name_root[] = "vlan";
53 static 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 /*
64 * Generic /proc/net/vlan/<file> file and inode operations
65 */
66
67 static const struct seq_operations vlan_seq_ops = {
68 .start = vlan_seq_start,
69 .next = vlan_seq_next,
70 .stop = vlan_seq_stop,
71 .show = vlan_seq_show,
72 };
73
74 static int vlan_seq_open(struct inode *inode, struct file *file)
75 {
76 return seq_open_net(inode, file, &vlan_seq_ops,
77 sizeof(struct seq_net_private));
78 }
79
80 static const struct file_operations vlan_fops = {
81 .owner = THIS_MODULE,
82 .open = vlan_seq_open,
83 .read = seq_read,
84 .llseek = seq_lseek,
85 .release = seq_release_net,
86 };
87
88 /*
89 * /proc/net/vlan/<device> file and inode operations
90 */
91
92 static int vlandev_seq_open(struct inode *inode, struct file *file)
93 {
94 return single_open(file, vlandev_seq_show, PDE(inode)->data);
95 }
96
97 static const struct file_operations vlandev_fops = {
98 .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
109 /* Strings */
110 static const char *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
124 void 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 proc_net_remove(net, name_root);
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
143 int 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|S_IRUSR|S_IWUSR,
152 vn->proc_vlan_dir, &vlan_fops);
153 if (!vn->proc_vlan_conf)
154 goto err;
155 return 0;
156
157 err:
158 pr_err("%s: can't create entry in proc filesystem!\n", __func__);
159 vlan_proc_cleanup(net);
160 return -ENOBUFS;
161 }
162
163 /*
164 * Add directory entry for VLAN device.
165 */
166
167 int vlan_proc_add_dev(struct net_device *vlandev)
168 {
169 struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
170 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
171
172 dev_info->dent =
173 proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
174 vn->proc_vlan_dir, &vlandev_fops, vlandev);
175 if (!dev_info->dent)
176 return -ENOBUFS;
177 return 0;
178 }
179
180 /*
181 * Delete directory entry for VLAN device.
182 */
183 int vlan_proc_rem_dev(struct net_device *vlandev)
184 {
185 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
186
187 /** NOTE: This will consume the memory pointed to by dent, it seems. */
188 if (vlan_dev_info(vlandev)->dent) {
189 remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
190 vn->proc_vlan_dir);
191 vlan_dev_info(vlandev)->dent = NULL;
192 }
193 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
202 /* start read of /proc/net/vlan/config */
203 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
204 __acquires(dev_base_lock)
205 {
206 struct net_device *dev;
207 struct net *net = seq_file_net(seq);
208 loff_t i = 1;
209
210 read_lock(&dev_base_lock);
211
212 if (*pos == 0)
213 return SEQ_START_TOKEN;
214
215 for_each_netdev(net, dev) {
216 if (!is_vlan_dev(dev))
217 continue;
218
219 if (i++ == *pos)
220 return dev;
221 }
222
223 return NULL;
224 }
225
226 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
227 {
228 struct net_device *dev;
229 struct net *net = seq_file_net(seq);
230
231 ++*pos;
232
233 dev = (struct net_device *)v;
234 if (v == SEQ_START_TOKEN)
235 dev = net_device_entry(&net->dev_base_head);
236
237 for_each_netdev_continue(net, dev) {
238 if (!is_vlan_dev(dev))
239 continue;
240
241 return dev;
242 }
243
244 return NULL;
245 }
246
247 static void vlan_seq_stop(struct seq_file *seq, void *v)
248 __releases(dev_base_lock)
249 {
250 read_unlock(&dev_base_lock);
251 }
252
253 static int vlan_seq_show(struct seq_file *seq, void *v)
254 {
255 struct net *net = seq_file_net(seq);
256 struct vlan_net *vn = net_generic(net, vlan_net_id);
257
258 if (v == SEQ_START_TOKEN) {
259 const char *nmtype = NULL;
260
261 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
262
263 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
264 nmtype = vlan_name_type_str[vn->name_type];
265
266 seq_printf(seq, "Name-Type: %s\n",
267 nmtype ? nmtype : "UNKNOWN");
268 } else {
269 const struct net_device *vlandev = v;
270 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
271
272 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
273 dev_info->vlan_id, dev_info->real_dev->name);
274 }
275 return 0;
276 }
277
278 static int vlandev_seq_show(struct seq_file *seq, void *offset)
279 {
280 struct net_device *vlandev = (struct net_device *) seq->private;
281 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
282 const struct net_device_stats *stats;
283 static const char fmt[] = "%30s %12lu\n";
284 int i;
285
286 if (!is_vlan_dev(vlandev))
287 return 0;
288
289 stats = dev_get_stats(vlandev);
290 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);
294
295 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);
301 seq_printf(seq, fmt, "total headroom inc",
302 dev_info->cnt_inc_headroom_on_tx);
303 seq_printf(seq, fmt, "total encap on xmit",
304 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 */
307 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]);
317
318 seq_printf(seq, " EGRESS priority mappings: ");
319 for (i = 0; i < 16; i++) {
320 const struct vlan_priority_tci_mapping *mp
321 = dev_info->egress_priority_map[i];
322 while (mp) {
323 seq_printf(seq, "%u:%hu ",
324 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
325 mp = mp->next;
326 }
327 }
328 seq_puts(seq, "\n");
329
330 return 0;
331 }
332
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