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/config.h>
21 #include <linux/module.h>
22 #include <linux/stddef.h> /* offsetof(), etc. */
23 #include <linux/errno.h> /* return codes */
24 #include <linux/kernel.h>
25 #include <linux/slab.h> /* kmalloc(), kfree() */
26 #include <linux/mm.h> /* verify_area(), etc. */
27 #include <linux/string.h> /* inline mem*, str* functions */
28 #include <linux/init.h> /* __initfunc et al. */
29 #include <asm/byteorder.h> /* htons(), etc. */
30 #include <asm/uaccess.h> /* copy_to_user */
31 #include <asm/io.h>
32 #include <linux/proc_fs.h>
33 #include <linux/seq_file.h>
34 #include <linux/fs.h>
35 #include <linux/netdevice.h>
36 #include <linux/if_vlan.h>
37 #include "vlanproc.h"
38 #include "vlan.h"
39
40 /****** Function Prototypes *************************************************/
41
42 /* Methods for preparing data for reading proc entries */
43 static int vlan_seq_show(struct seq_file *seq, void *v);
44 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
45 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
46 static void vlan_seq_stop(struct seq_file *seq, void *);
47 static int vlandev_seq_show(struct seq_file *seq, void *v);
48
49 /*
50 * Global Data
51 */
52
53
54 /*
55 * Names of the proc directory entries
56 */
57
58 static const char name_root[] = "vlan";
59 static const char name_conf[] = "config";
60
61 /*
62 * Structures for interfacing with the /proc filesystem.
63 * VLAN creates its own directory /proc/net/vlan with the folowing
64 * entries:
65 * config device status/configuration
66 * <device> entry for each device
67 */
68
69 /*
70 * Generic /proc/net/vlan/<file> file and inode operations
71 */
72
73 static struct seq_operations vlan_seq_ops = {
74 .start = vlan_seq_start,
75 .next = vlan_seq_next,
76 .stop = vlan_seq_stop,
77 .show = vlan_seq_show,
78 };
79
80 static int vlan_seq_open(struct inode *inode, struct file *file)
81 {
82 return seq_open(file, &vlan_seq_ops);
83 }
84
85 static struct file_operations vlan_fops = {
86 .owner = THIS_MODULE,
87 .open = vlan_seq_open,
88 .read = seq_read,
89 .llseek = seq_lseek,
90 .release = seq_release,
91 };
92
93 /*
94 * /proc/net/vlan/<device> file and inode operations
95 */
96
97 static int vlandev_seq_open(struct inode *inode, struct file *file)
98 {
99 return single_open(file, vlandev_seq_show, PDE(inode)->data);
100 }
101
102 static struct file_operations vlandev_fops = {
103 .owner = THIS_MODULE,
104 .open = vlandev_seq_open,
105 .read = seq_read,
106 .llseek = seq_lseek,
107 .release = single_release,
108 };
109
110 /*
111 * Proc filesystem derectory entries.
112 */
113
114 /*
115 * /proc/net/vlan
116 */
117
118 static struct proc_dir_entry *proc_vlan_dir;
119
120 /*
121 * /proc/net/vlan/config
122 */
123
124 static struct proc_dir_entry *proc_vlan_conf;
125
126 /* Strings */
127 static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
128 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID",
129 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
130 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD]= "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
131 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID",
132 };
133 /*
134 * Interface functions
135 */
136
137 /*
138 * Clean up /proc/net/vlan entries
139 */
140
141 void vlan_proc_cleanup(void)
142 {
143 if (proc_vlan_conf)
144 remove_proc_entry(name_conf, proc_vlan_dir);
145
146 if (proc_vlan_dir)
147 proc_net_remove(name_root);
148
149 /* Dynamically added entries should be cleaned up as their vlan_device
150 * is removed, so we should not have to take care of it here...
151 */
152 }
153
154 /*
155 * Create /proc/net/vlan entries
156 */
157
158 int __init vlan_proc_init(void)
159 {
160 proc_vlan_dir = proc_mkdir(name_root, proc_net);
161 if (proc_vlan_dir) {
162 proc_vlan_conf = create_proc_entry(name_conf,
163 S_IFREG|S_IRUSR|S_IWUSR,
164 proc_vlan_dir);
165 if (proc_vlan_conf) {
166 proc_vlan_conf->proc_fops = &vlan_fops;
167 return 0;
168 }
169 }
170 vlan_proc_cleanup();
171 return -ENOBUFS;
172 }
173
174 /*
175 * Add directory entry for VLAN device.
176 */
177
178 int vlan_proc_add_dev (struct net_device *vlandev)
179 {
180 struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
181
182 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
183 printk(KERN_ERR
184 "ERROR: vlan_proc_add, device -:%s:- is NOT a VLAN\n",
185 vlandev->name);
186 return -EINVAL;
187 }
188
189 dev_info->dent = create_proc_entry(vlandev->name,
190 S_IFREG|S_IRUSR|S_IWUSR,
191 proc_vlan_dir);
192 if (!dev_info->dent)
193 return -ENOBUFS;
194
195 dev_info->dent->proc_fops = &vlandev_fops;
196 dev_info->dent->data = vlandev;
197
198 #ifdef VLAN_DEBUG
199 printk(KERN_ERR "vlan_proc_add, device -:%s:- being added.\n",
200 vlandev->name);
201 #endif
202 return 0;
203 }
204
205 /*
206 * Delete directory entry for VLAN device.
207 */
208 int vlan_proc_rem_dev(struct net_device *vlandev)
209 {
210 if (!vlandev) {
211 printk(VLAN_ERR "%s: invalid argument: %p\n",
212 __FUNCTION__, vlandev);
213 return -EINVAL;
214 }
215
216 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
217 printk(VLAN_DBG "%s: invalid argument, device: %s is not a VLAN device, priv_flags: 0x%4hX.\n",
218 __FUNCTION__, vlandev->name, vlandev->priv_flags);
219 return -EINVAL;
220 }
221
222 #ifdef VLAN_DEBUG
223 printk(VLAN_DBG "%s: dev: %p\n", __FUNCTION__, vlandev);
224 #endif
225
226 /** NOTE: This will consume the memory pointed to by dent, it seems. */
227 if (VLAN_DEV_INFO(vlandev)->dent) {
228 remove_proc_entry(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir);
229 VLAN_DEV_INFO(vlandev)->dent = NULL;
230 }
231
232 return 0;
233 }
234
235 /****** Proc filesystem entry points ****************************************/
236
237 /*
238 * The following few functions build the content of /proc/net/vlan/config
239 */
240
241 /* starting at dev, find a VLAN device */
242 static struct net_device *vlan_skip(struct net_device *dev)
243 {
244 while (dev && !(dev->priv_flags & IFF_802_1Q_VLAN))
245 dev = dev->next;
246
247 return dev;
248 }
249
250 /* start read of /proc/net/vlan/config */
251 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
252 {
253 struct net_device *dev;
254 loff_t i = 1;
255
256 read_lock(&dev_base_lock);
257
258 if (*pos == 0)
259 return SEQ_START_TOKEN;
260
261 for (dev = vlan_skip(dev_base); dev && i < *pos;
262 dev = vlan_skip(dev->next), ++i);
263
264 return (i == *pos) ? dev : NULL;
265 }
266
267 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
268 {
269 ++*pos;
270
271 return vlan_skip((v == SEQ_START_TOKEN)
272 ? dev_base
273 : ((struct net_device *)v)->next);
274 }
275
276 static void vlan_seq_stop(struct seq_file *seq, void *v)
277 {
278 read_unlock(&dev_base_lock);
279 }
280
281 static int vlan_seq_show(struct seq_file *seq, void *v)
282 {
283 if (v == SEQ_START_TOKEN) {
284 const char *nmtype = NULL;
285
286 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
287
288 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str))
289 nmtype = vlan_name_type_str[vlan_name_type];
290
291 seq_printf(seq, "Name-Type: %s\n",
292 nmtype ? nmtype : "UNKNOWN" );
293 } else {
294 const struct net_device *vlandev = v;
295 const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
296
297 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
298 dev_info->vlan_id, dev_info->real_dev->name);
299 }
300 return 0;
301 }
302
303 static int vlandev_seq_show(struct seq_file *seq, void *offset)
304 {
305 struct net_device *vlandev = (struct net_device *) seq->private;
306 const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
307 struct net_device_stats *stats;
308 static const char fmt[] = "%30s %12lu\n";
309 int i;
310
311 if ((vlandev == NULL) || (!(vlandev->priv_flags & IFF_802_1Q_VLAN)))
312 return 0;
313
314 seq_printf(seq, "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
315 vlandev->name, dev_info->vlan_id,
316 (int)(dev_info->flags & 1), vlandev->priv_flags);
317
318
319 stats = vlan_dev_get_stats(vlandev);
320
321 seq_printf(seq, fmt, "total frames received", stats->rx_packets);
322 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
323 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
324 seq_puts(seq, "\n");
325 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
326 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
327 seq_printf(seq, fmt, "total headroom inc",
328 dev_info->cnt_inc_headroom_on_tx);
329 seq_printf(seq, fmt, "total encap on xmit",
330 dev_info->cnt_encap_on_xmit);
331 seq_printf(seq, "Device: %s", dev_info->real_dev->name);
332 /* now show all PRIORITY mappings relating to this VLAN */
333 seq_printf(seq,
334 "\nINGRESS priority mappings: 0:%lu 1:%lu 2:%lu 3:%lu 4:%lu 5:%lu 6:%lu 7:%lu\n",
335 dev_info->ingress_priority_map[0],
336 dev_info->ingress_priority_map[1],
337 dev_info->ingress_priority_map[2],
338 dev_info->ingress_priority_map[3],
339 dev_info->ingress_priority_map[4],
340 dev_info->ingress_priority_map[5],
341 dev_info->ingress_priority_map[6],
342 dev_info->ingress_priority_map[7]);
343
344 seq_printf(seq, "EGRESSS priority Mappings: ");
345 for (i = 0; i < 16; i++) {
346 const struct vlan_priority_tci_mapping *mp
347 = dev_info->egress_priority_map[i];
348 while (mp) {
349 seq_printf(seq, "%lu:%hu ",
350 mp->priority, ((mp->vlan_qos >> 13) & 0x7));
351 mp = mp->next;
352 }
353 }
354 seq_puts(seq, "\n");
355
356 return 0;
357 }
358
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