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