5e24f72602a1b1a927938f8fe9b2e47cc6d32a98
[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/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() */
25 #include <linux/mm.h>
26 #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>
36 #include "vlanproc.h"
37 #include "vlan.h"
38
39 /****** Function Prototypes *************************************************/
40
41 /* Methods for preparing data for reading proc entries */
42 static int vlan_seq_show(struct seq_file *seq, void *v);
43 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
44 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
45 static void vlan_seq_stop(struct seq_file *seq, void *);
46 static int vlandev_seq_show(struct seq_file *seq, void *v);
47
48 /*
49  *      Global Data
50  */
51
52
53 /*
54  *      Names of the proc directory entries
55  */
56
57 static const char name_root[]    = "vlan";
58 static const char name_conf[]    = "config";
59
60 /*
61  *      Structures for interfacing with the /proc filesystem.
62  *      VLAN creates its own directory /proc/net/vlan with the folowing
63  *      entries:
64  *      config          device status/configuration
65  *      <device>        entry for each  device
66  */
67
68 /*
69  *      Generic /proc/net/vlan/<file> file and inode operations
70  */
71
72 static struct seq_operations vlan_seq_ops = {
73         .start = vlan_seq_start,
74         .next = vlan_seq_next,
75         .stop = vlan_seq_stop,
76         .show = vlan_seq_show,
77 };
78
79 static int vlan_seq_open(struct inode *inode, struct file *file)
80 {
81         return seq_open(file, &vlan_seq_ops);
82 }
83
84 static const struct file_operations vlan_fops = {
85         .owner   = THIS_MODULE,
86         .open    = vlan_seq_open,
87         .read    = seq_read,
88         .llseek  = seq_lseek,
89         .release = seq_release,
90 };
91
92 /*
93  *      /proc/net/vlan/<device> file and inode operations
94  */
95
96 static int vlandev_seq_open(struct inode *inode, struct file *file)
97 {
98         return single_open(file, vlandev_seq_show, PDE(inode)->data);
99 }
100
101 static const struct file_operations vlandev_fops = {
102         .owner = THIS_MODULE,
103         .open    = vlandev_seq_open,
104         .read    = seq_read,
105         .llseek  = seq_lseek,
106         .release = single_release,
107 };
108
109 /*
110  * Proc filesystem derectory entries.
111  */
112
113 /*
114  *      /proc/net/vlan
115  */
116
117 static struct proc_dir_entry *proc_vlan_dir;
118
119 /*
120  *      /proc/net/vlan/config
121  */
122
123 static struct proc_dir_entry *proc_vlan_conf;
124
125 /* Strings */
126 static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
127     [VLAN_NAME_TYPE_RAW_PLUS_VID]       = "VLAN_NAME_TYPE_RAW_PLUS_VID",
128     [VLAN_NAME_TYPE_PLUS_VID_NO_PAD]    = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
129     [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD]= "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
130     [VLAN_NAME_TYPE_PLUS_VID]           = "VLAN_NAME_TYPE_PLUS_VID",
131 };
132 /*
133  *      Interface functions
134  */
135
136 /*
137  *      Clean up /proc/net/vlan entries
138  */
139
140 void vlan_proc_cleanup(void)
141 {
142         if (proc_vlan_conf)
143                 remove_proc_entry(name_conf, proc_vlan_dir);
144
145         if (proc_vlan_dir)
146                 proc_net_remove(name_root);
147
148         /* Dynamically added entries should be cleaned up as their vlan_device
149          * is removed, so we should not have to take care of it here...
150          */
151 }
152
153 /*
154  *      Create /proc/net/vlan entries
155  */
156
157 int __init vlan_proc_init(void)
158 {
159         proc_vlan_dir = proc_mkdir(name_root, proc_net);
160         if (proc_vlan_dir) {
161                 proc_vlan_conf = create_proc_entry(name_conf,
162                                                    S_IFREG|S_IRUSR|S_IWUSR,
163                                                    proc_vlan_dir);
164                 if (proc_vlan_conf) {
165                         proc_vlan_conf->proc_fops = &vlan_fops;
166                         return 0;
167                 }
168         }
169         vlan_proc_cleanup();
170         return -ENOBUFS;
171 }
172
173 /*
174  *      Add directory entry for VLAN device.
175  */
176
177 int vlan_proc_add_dev (struct net_device *vlandev)
178 {
179         struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
180
181         if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
182                 printk(KERN_ERR
183                        "ERROR:  vlan_proc_add, device -:%s:- is NOT a VLAN\n",
184                        vlandev->name);
185                 return -EINVAL;
186         }
187
188         dev_info->dent = create_proc_entry(vlandev->name,
189                                            S_IFREG|S_IRUSR|S_IWUSR,
190                                            proc_vlan_dir);
191         if (!dev_info->dent)
192                 return -ENOBUFS;
193
194         dev_info->dent->proc_fops = &vlandev_fops;
195         dev_info->dent->data = vlandev;
196
197 #ifdef VLAN_DEBUG
198         printk(KERN_ERR "vlan_proc_add, device -:%s:- being added.\n",
199                vlandev->name);
200 #endif
201         return 0;
202 }
203
204 /*
205  *      Delete directory entry for VLAN device.
206  */
207 int vlan_proc_rem_dev(struct net_device *vlandev)
208 {
209         if (!vlandev) {
210                 printk(VLAN_ERR "%s: invalid argument: %p\n",
211                         __FUNCTION__, vlandev);
212                 return -EINVAL;
213         }
214
215         if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
216                 printk(VLAN_DBG "%s: invalid argument, device: %s is not a VLAN device, priv_flags: 0x%4hX.\n",
217                         __FUNCTION__, vlandev->name, vlandev->priv_flags);
218                 return -EINVAL;
219         }
220
221 #ifdef VLAN_DEBUG
222         printk(VLAN_DBG "%s: dev: %p\n", __FUNCTION__, vlandev);
223 #endif
224
225         /** NOTE:  This will consume the memory pointed to by dent, it seems. */
226         if (VLAN_DEV_INFO(vlandev)->dent) {
227                 remove_proc_entry(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir);
228                 VLAN_DEV_INFO(vlandev)->dent = NULL;
229         }
230
231         return 0;
232 }
233
234 /****** Proc filesystem entry points ****************************************/
235
236 /*
237  * The following few functions build the content of /proc/net/vlan/config
238  */
239
240 /* starting at dev, find a VLAN device */
241 static struct net_device *vlan_skip(struct net_device *dev)
242 {
243         while (dev && !(dev->priv_flags & IFF_802_1Q_VLAN))
244                 dev = dev->next;
245
246         return dev;
247 }
248
249 /* start read of /proc/net/vlan/config */
250 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
251 {
252         struct net_device *dev;
253         loff_t i = 1;
254
255         read_lock(&dev_base_lock);
256
257         if (*pos == 0)
258                 return SEQ_START_TOKEN;
259
260         for (dev = vlan_skip(dev_base); dev && i < *pos;
261              dev = vlan_skip(dev->next), ++i);
262
263         return  (i == *pos) ? dev : NULL;
264 }
265
266 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
267 {
268         ++*pos;
269
270         return vlan_skip((v == SEQ_START_TOKEN)
271                             ? dev_base
272                             : ((struct net_device *)v)->next);
273 }
274
275 static void vlan_seq_stop(struct seq_file *seq, void *v)
276 {
277         read_unlock(&dev_base_lock);
278 }
279
280 static int vlan_seq_show(struct seq_file *seq, void *v)
281 {
282         if (v == SEQ_START_TOKEN) {
283                 const char *nmtype = NULL;
284
285                 seq_puts(seq, "VLAN Dev name     | VLAN ID\n");
286
287                 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str))
288                     nmtype =  vlan_name_type_str[vlan_name_type];
289
290                 seq_printf(seq, "Name-Type: %s\n",
291                            nmtype ? nmtype :  "UNKNOWN" );
292         } else {
293                 const struct net_device *vlandev = v;
294                 const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
295
296                 seq_printf(seq, "%-15s| %d  | %s\n",  vlandev->name,
297                            dev_info->vlan_id,    dev_info->real_dev->name);
298         }
299         return 0;
300 }
301
302 static int vlandev_seq_show(struct seq_file *seq, void *offset)
303 {
304         struct net_device *vlandev = (struct net_device *) seq->private;
305         const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev);
306         struct net_device_stats *stats;
307         static const char fmt[] = "%30s %12lu\n";
308         int i;
309
310         if ((vlandev == NULL) || (!(vlandev->priv_flags & IFF_802_1Q_VLAN)))
311                 return 0;
312
313         seq_printf(seq, "%s  VID: %d     REORDER_HDR: %i  dev->priv_flags: %hx\n",
314                        vlandev->name, dev_info->vlan_id,
315                        (int)(dev_info->flags & 1), vlandev->priv_flags);
316
317
318         stats = vlan_dev_get_stats(vlandev);
319
320         seq_printf(seq, fmt, "total frames received", stats->rx_packets);
321         seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
322         seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
323         seq_puts(seq, "\n");
324         seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
325         seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
326         seq_printf(seq, fmt, "total headroom inc",
327                    dev_info->cnt_inc_headroom_on_tx);
328         seq_printf(seq, fmt, "total encap on xmit",
329                    dev_info->cnt_encap_on_xmit);
330         seq_printf(seq, "Device: %s", dev_info->real_dev->name);
331         /* now show all PRIORITY mappings relating to this VLAN */
332         seq_printf(seq,
333                        "\nINGRESS priority mappings: 0:%lu  1:%lu  2:%lu  3:%lu  4:%lu  5:%lu  6:%lu 7:%lu\n",
334                        dev_info->ingress_priority_map[0],
335                        dev_info->ingress_priority_map[1],
336                        dev_info->ingress_priority_map[2],
337                        dev_info->ingress_priority_map[3],
338                        dev_info->ingress_priority_map[4],
339                        dev_info->ingress_priority_map[5],
340                        dev_info->ingress_priority_map[6],
341                        dev_info->ingress_priority_map[7]);
342
343         seq_printf(seq, "EGRESSS priority Mappings: ");
344         for (i = 0; i < 16; i++) {
345                 const struct vlan_priority_tci_mapping *mp
346                         = dev_info->egress_priority_map[i];
347                 while (mp) {
348                         seq_printf(seq, "%lu:%hu ",
349                                    mp->priority, ((mp->vlan_qos >> 13) & 0x7));
350                         mp = mp->next;
351                 }
352         }
353         seq_puts(seq, "\n");
354
355         return 0;
356 }