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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22 #include <linux/module.h>
23 #include <linux/errno.h>
24 #include <linux/kernel.h>
25 #include <linux/string.h>
26 #include <linux/proc_fs.h>
27 #include <linux/seq_file.h>
29 #include <linux/netdevice.h>
30 #include <linux/if_vlan.h>
31 #include <net/net_namespace.h>
32 #include <net/netns/generic.h>
36 /****** Function Prototypes *************************************************/
38 /* Methods for preparing data for reading proc entries */
39 static int vlan_seq_show(struct seq_file *seq, void *v);
40 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos);
41 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos);
42 static void vlan_seq_stop(struct seq_file *seq, void *);
43 static int vlandev_seq_show(struct seq_file *seq, void *v);
51 * Names of the proc directory entries
54 static const char name_root[] = "vlan";
55 static const char name_conf[] = "config";
58 * Structures for interfacing with the /proc filesystem.
59 * VLAN creates its own directory /proc/net/vlan with the following
61 * config device status/configuration
62 * <device> entry for each device
66 * Generic /proc/net/vlan/<file> file and inode operations
69 static const struct seq_operations vlan_seq_ops = {
70 .start = vlan_seq_start,
71 .next = vlan_seq_next,
72 .stop = vlan_seq_stop,
73 .show = vlan_seq_show,
76 static int vlan_seq_open(struct inode *inode, struct file *file)
78 return seq_open_net(inode, file, &vlan_seq_ops,
79 sizeof(struct seq_net_private));
82 static const struct file_operations vlan_fops = {
84 .open = vlan_seq_open,
87 .release = seq_release_net,
91 * /proc/net/vlan/<device> file and inode operations
94 static int vlandev_seq_open(struct inode *inode, struct file *file)
96 return single_open(file, vlandev_seq_show, PDE(inode)->data);
99 static const struct file_operations vlandev_fops = {
100 .owner = THIS_MODULE,
101 .open = vlandev_seq_open,
104 .release = single_release,
108 * Proc filesystem derectory entries.
112 static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
113 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID",
114 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD",
115 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD",
116 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID",
119 * Interface functions
123 * Clean up /proc/net/vlan entries
126 void vlan_proc_cleanup(struct net *net)
128 struct vlan_net *vn = net_generic(net, vlan_net_id);
130 if (vn->proc_vlan_conf)
131 remove_proc_entry(name_conf, vn->proc_vlan_dir);
133 if (vn->proc_vlan_dir)
134 proc_net_remove(net, name_root);
136 /* Dynamically added entries should be cleaned up as their vlan_device
137 * is removed, so we should not have to take care of it here...
142 * Create /proc/net/vlan entries
145 int __net_init vlan_proc_init(struct net *net)
147 struct vlan_net *vn = net_generic(net, vlan_net_id);
149 vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
150 if (!vn->proc_vlan_dir)
153 vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
154 vn->proc_vlan_dir, &vlan_fops);
155 if (!vn->proc_vlan_conf)
160 pr_err("can't create entry in proc filesystem!\n");
161 vlan_proc_cleanup(net);
166 * Add directory entry for VLAN device.
169 int vlan_proc_add_dev(struct net_device *vlandev)
171 struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
172 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
175 proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
176 vn->proc_vlan_dir, &vlandev_fops, vlandev);
183 * Delete directory entry for VLAN device.
185 int vlan_proc_rem_dev(struct net_device *vlandev)
187 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
189 /** NOTE: This will consume the memory pointed to by dent, it seems. */
190 if (vlan_dev_info(vlandev)->dent) {
191 remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
193 vlan_dev_info(vlandev)->dent = NULL;
198 /****** Proc filesystem entry points ****************************************/
201 * The following few functions build the content of /proc/net/vlan/config
204 /* start read of /proc/net/vlan/config */
205 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
208 struct net_device *dev;
209 struct net *net = seq_file_net(seq);
214 return SEQ_START_TOKEN;
216 for_each_netdev_rcu(net, dev) {
217 if (!is_vlan_dev(dev))
227 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
229 struct net_device *dev;
230 struct net *net = seq_file_net(seq);
235 if (v == SEQ_START_TOKEN)
236 dev = net_device_entry(&net->dev_base_head);
238 for_each_netdev_continue_rcu(net, dev) {
239 if (!is_vlan_dev(dev))
248 static void vlan_seq_stop(struct seq_file *seq, void *v)
254 static int vlan_seq_show(struct seq_file *seq, void *v)
256 struct net *net = seq_file_net(seq);
257 struct vlan_net *vn = net_generic(net, vlan_net_id);
259 if (v == SEQ_START_TOKEN) {
260 const char *nmtype = NULL;
262 seq_puts(seq, "VLAN Dev name | VLAN ID\n");
264 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str))
265 nmtype = vlan_name_type_str[vn->name_type];
267 seq_printf(seq, "Name-Type: %s\n",
268 nmtype ? nmtype : "UNKNOWN");
270 const struct net_device *vlandev = v;
271 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
273 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name,
274 dev_info->vlan_id, dev_info->real_dev->name);
279 static int vlandev_seq_show(struct seq_file *seq, void *offset)
281 struct net_device *vlandev = (struct net_device *) seq->private;
282 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
283 struct rtnl_link_stats64 temp;
284 const struct rtnl_link_stats64 *stats;
285 static const char fmt64[] = "%30s %12llu\n";
288 if (!is_vlan_dev(vlandev))
291 stats = dev_get_stats(vlandev, &temp);
293 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
294 vlandev->name, dev_info->vlan_id,
295 (int)(dev_info->flags & 1), vlandev->priv_flags);
297 seq_printf(seq, fmt64, "total frames received", stats->rx_packets);
298 seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes);
299 seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast);
301 seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets);
302 seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes);
303 seq_printf(seq, "Device: %s", dev_info->real_dev->name);
304 /* now show all PRIORITY mappings relating to this VLAN */
305 seq_printf(seq, "\nINGRESS priority mappings: "
306 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
307 dev_info->ingress_priority_map[0],
308 dev_info->ingress_priority_map[1],
309 dev_info->ingress_priority_map[2],
310 dev_info->ingress_priority_map[3],
311 dev_info->ingress_priority_map[4],
312 dev_info->ingress_priority_map[5],
313 dev_info->ingress_priority_map[6],
314 dev_info->ingress_priority_map[7]);
316 seq_printf(seq, " EGRESS priority mappings: ");
317 for (i = 0; i < 16; i++) {
318 const struct vlan_priority_tci_mapping *mp
319 = dev_info->egress_priority_map[i];
321 seq_printf(seq, "%u:%hu ",
322 mp->priority, ((mp->vlan_qos >> 13) & 0x7));