afead353e215fc0028530b033ee9104c8bb51ca5
[linux-3.10.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/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 *const 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 __net_init 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(rcu)
205 {
206         struct net_device *dev;
207         struct net *net = seq_file_net(seq);
208         loff_t i = 1;
209
210         rcu_read_lock();
211         if (*pos == 0)
212                 return SEQ_START_TOKEN;
213
214         for_each_netdev_rcu(net, dev) {
215                 if (!is_vlan_dev(dev))
216                         continue;
217
218                 if (i++ == *pos)
219                         return dev;
220         }
221
222         return  NULL;
223 }
224
225 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
226 {
227         struct net_device *dev;
228         struct net *net = seq_file_net(seq);
229
230         ++*pos;
231
232         dev = (struct net_device *)v;
233         if (v == SEQ_START_TOKEN)
234                 dev = net_device_entry(&net->dev_base_head);
235
236         for_each_netdev_continue_rcu(net, dev) {
237                 if (!is_vlan_dev(dev))
238                         continue;
239
240                 return dev;
241         }
242
243         return NULL;
244 }
245
246 static void vlan_seq_stop(struct seq_file *seq, void *v)
247         __releases(rcu)
248 {
249         rcu_read_unlock();
250 }
251
252 static int vlan_seq_show(struct seq_file *seq, void *v)
253 {
254         struct net *net = seq_file_net(seq);
255         struct vlan_net *vn = net_generic(net, vlan_net_id);
256
257         if (v == SEQ_START_TOKEN) {
258                 const char *nmtype = NULL;
259
260                 seq_puts(seq, "VLAN Dev name     | VLAN ID\n");
261
262                 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
263                     nmtype =  vlan_name_type_str[vn->name_type];
264
265                 seq_printf(seq, "Name-Type: %s\n",
266                            nmtype ? nmtype :  "UNKNOWN");
267         } else {
268                 const struct net_device *vlandev = v;
269                 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
270
271                 seq_printf(seq, "%-15s| %d  | %s\n",  vlandev->name,
272                            dev_info->vlan_id,    dev_info->real_dev->name);
273         }
274         return 0;
275 }
276
277 static int vlandev_seq_show(struct seq_file *seq, void *offset)
278 {
279         struct net_device *vlandev = (struct net_device *) seq->private;
280         const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
281         const struct net_device_stats *stats;
282         static const char fmt[] = "%30s %12lu\n";
283         int i;
284
285         if (!is_vlan_dev(vlandev))
286                 return 0;
287
288         stats = dev_get_stats(vlandev);
289         seq_printf(seq,
290                    "%s  VID: %d  REORDER_HDR: %i  dev->priv_flags: %hx\n",
291                    vlandev->name, dev_info->vlan_id,
292                    (int)(dev_info->flags & 1), vlandev->priv_flags);
293
294         seq_printf(seq, fmt, "total frames received", stats->rx_packets);
295         seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
296         seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
297         seq_puts(seq, "\n");
298         seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
299         seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
300         seq_printf(seq, fmt, "total headroom inc",
301                    dev_info->cnt_inc_headroom_on_tx);
302         seq_printf(seq, fmt, "total encap on xmit",
303                    dev_info->cnt_encap_on_xmit);
304         seq_printf(seq, "Device: %s", dev_info->real_dev->name);
305         /* now show all PRIORITY mappings relating to this VLAN */
306         seq_printf(seq, "\nINGRESS priority mappings: "
307                         "0:%u  1:%u  2:%u  3:%u  4:%u  5:%u  6:%u 7:%u\n",
308                    dev_info->ingress_priority_map[0],
309                    dev_info->ingress_priority_map[1],
310                    dev_info->ingress_priority_map[2],
311                    dev_info->ingress_priority_map[3],
312                    dev_info->ingress_priority_map[4],
313                    dev_info->ingress_priority_map[5],
314                    dev_info->ingress_priority_map[6],
315                    dev_info->ingress_priority_map[7]);
316
317         seq_printf(seq, " EGRESS priority mappings: ");
318         for (i = 0; i < 16; i++) {
319                 const struct vlan_priority_tci_mapping *mp
320                         = dev_info->egress_priority_map[i];
321                 while (mp) {
322                         seq_printf(seq, "%u:%hu ",
323                                    mp->priority, ((mp->vlan_qos >> 13) & 0x7));
324                         mp = mp->next;
325                 }
326         }
327         seq_puts(seq, "\n");
328
329         return 0;
330 }