1 /******************************************************************************
2 * vlanproc.c VLAN Module. /proc filesystem interface.
4 * This module is completely hardware-independent and provides
5 * access to the router using Linux /proc filesystem.
7 * Author: Ben Greear, <greearb@candelatech.com> coppied from wanproc.c
8 * by: Gene Kozin <genek@compuserve.com>
10 * Copyright: (c) 1998 Ben Greear
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 *****************************************************************************/
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() */
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 */
31 #include <linux/proc_fs.h>
32 #include <linux/seq_file.h>
34 #include <linux/netdevice.h>
35 #include <linux/if_vlan.h>
36 #include <net/net_namespace.h>
40 /****** Function Prototypes *************************************************/
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);
55 * Names of the proc directory entries
58 static const char name_root[] = "vlan";
59 static const char name_conf[] = "config";
62 * Structures for interfacing with the /proc filesystem.
63 * VLAN creates its own directory /proc/net/vlan with the folowing
65 * config device status/configuration
66 * <device> entry for each device
70 * Generic /proc/net/vlan/<file> file and inode operations
73 static const 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,
80 static int vlan_seq_open(struct inode *inode, struct file *file)
82 return seq_open(file, &vlan_seq_ops);
85 static const struct file_operations vlan_fops = {
87 .open = vlan_seq_open,
90 .release = seq_release,
94 * /proc/net/vlan/<device> file and inode operations
97 static int vlandev_seq_open(struct inode *inode, struct file *file)
99 return single_open(file, vlandev_seq_show, PDE(inode)->data);
102 static const struct file_operations vlandev_fops = {
103 .owner = THIS_MODULE,
104 .open = vlandev_seq_open,
107 .release = single_release,
111 * Proc filesystem derectory entries.
118 static struct proc_dir_entry *proc_vlan_dir;
121 * /proc/net/vlan/config
124 static struct proc_dir_entry *proc_vlan_conf;
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",
134 * Interface functions
138 * Clean up /proc/net/vlan entries
141 void vlan_proc_cleanup(struct net *net)
143 if (net != &init_net)
147 remove_proc_entry(name_conf, proc_vlan_dir);
150 proc_net_remove(&init_net, name_root);
152 /* Dynamically added entries should be cleaned up as their vlan_device
153 * is removed, so we should not have to take care of it here...
158 * Create /proc/net/vlan entries
161 int vlan_proc_init(struct net *net)
163 if (net != &init_net)
166 proc_vlan_dir = proc_mkdir(name_root, init_net.proc_net);
170 proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
171 proc_vlan_dir, &vlan_fops);
177 pr_err("%s: can't create entry in proc filesystem!\n", __func__);
178 vlan_proc_cleanup(net);
183 * Add directory entry for VLAN device.
186 int vlan_proc_add_dev(struct net_device *vlandev)
188 struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
190 dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
191 proc_vlan_dir, &vlandev_fops);
195 dev_info->dent->data = vlandev;
200 * Delete directory entry for VLAN device.
202 int vlan_proc_rem_dev(struct net_device *vlandev)
204 /** NOTE: This will consume the memory pointed to by dent, it seems. */
205 if (vlan_dev_info(vlandev)->dent) {
206 remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
208 vlan_dev_info(vlandev)->dent = NULL;
213 /****** Proc filesystem entry points ****************************************/
216 * The following few functions build the content of /proc/net/vlan/config
219 /* start read of /proc/net/vlan/config */
220 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
221 __acquires(dev_base_lock)
223 struct net_device *dev;
226 read_lock(&dev_base_lock);
229 return SEQ_START_TOKEN;
231 for_each_netdev(&init_net, dev) {
232 if (!is_vlan_dev(dev))
242 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
244 struct net_device *dev;
248 dev = (struct net_device *)v;
249 if (v == SEQ_START_TOKEN)
250 dev = net_device_entry(&init_net.dev_base_head);
252 for_each_netdev_continue(&init_net, dev) {
253 if (!is_vlan_dev(dev))
262 static void vlan_seq_stop(struct seq_file *seq, void *v)
263 __releases(dev_base_lock)
265 read_unlock(&dev_base_lock);
268 static int vlan_seq_show(struct seq_file *seq, void *v)
270 if (v == SEQ_START_TOKEN) {
271 const char *nmtype = NULL;
273 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
275 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str))
276 nmtype = vlan_name_type_str[vlan_name_type];
278 seq_printf(seq, "Name-Type: %s\n",
279 nmtype ? nmtype : "UNKNOWN");
281 const struct net_device *vlandev = v;
282 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
284 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
285 dev_info->vlan_id, dev_info->real_dev->name);
290 static int vlandev_seq_show(struct seq_file *seq, void *offset)
292 struct net_device *vlandev = (struct net_device *) seq->private;
293 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
294 struct net_device_stats *stats = &vlandev->stats;
295 static const char fmt[] = "%30s %12lu\n";
298 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN))
302 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
303 vlandev->name, dev_info->vlan_id,
304 (int)(dev_info->flags & 1), vlandev->priv_flags);
306 seq_printf(seq, fmt, "total frames received", stats->rx_packets);
307 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
308 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
310 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
311 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
312 seq_printf(seq, fmt, "total headroom inc",
313 dev_info->cnt_inc_headroom_on_tx);
314 seq_printf(seq, fmt, "total encap on xmit",
315 dev_info->cnt_encap_on_xmit);
316 seq_printf(seq, "Device: %s", dev_info->real_dev->name);
317 /* now show all PRIORITY mappings relating to this VLAN */
318 seq_printf(seq, "\nINGRESS priority mappings: "
319 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
320 dev_info->ingress_priority_map[0],
321 dev_info->ingress_priority_map[1],
322 dev_info->ingress_priority_map[2],
323 dev_info->ingress_priority_map[3],
324 dev_info->ingress_priority_map[4],
325 dev_info->ingress_priority_map[5],
326 dev_info->ingress_priority_map[6],
327 dev_info->ingress_priority_map[7]);
329 seq_printf(seq, "EGRESSS priority Mappings: ");
330 for (i = 0; i < 16; i++) {
331 const struct vlan_priority_tci_mapping *mp
332 = dev_info->egress_priority_map[i];
334 seq_printf(seq, "%u:%hu ",
335 mp->priority, ((mp->vlan_qos >> 13) & 0x7));