Linux-2.6.12-rc2
[linux-2.6.git] / net / 8021q / vlanproc.c
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 }