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/errno.h>
22 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
27 #include <linux/netdevice.h>
28 #include <linux/if_vlan.h>
29 #include <net/net_namespace.h>
30 #include <net/netns/generic.h>
34 /****** Function Prototypes *************************************************/
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
);
49 * Names of the proc directory entries
52 static const char name_root
[] = "vlan";
53 static const char name_conf
[] = "config";
56 * Structures for interfacing with the /proc filesystem.
57 * VLAN creates its own directory /proc/net/vlan with the folowing
59 * config device status/configuration
60 * <device> entry for each device
64 * Generic /proc/net/vlan/<file> file and inode operations
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
,
74 static int vlan_seq_open(struct inode
*inode
, struct file
*file
)
76 return seq_open_net(inode
, file
, &vlan_seq_ops
,
77 sizeof(struct seq_net_private
));
80 static const struct file_operations vlan_fops
= {
82 .open
= vlan_seq_open
,
85 .release
= seq_release_net
,
89 * /proc/net/vlan/<device> file and inode operations
92 static int vlandev_seq_open(struct inode
*inode
, struct file
*file
)
94 return single_open(file
, vlandev_seq_show
, PDE(inode
)->data
);
97 static const struct file_operations vlandev_fops
= {
99 .open
= vlandev_seq_open
,
102 .release
= single_release
,
106 * Proc filesystem derectory entries.
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",
117 * Interface functions
121 * Clean up /proc/net/vlan entries
124 void vlan_proc_cleanup(struct net
*net
)
126 struct vlan_net
*vn
= net_generic(net
, vlan_net_id
);
128 if (vn
->proc_vlan_conf
)
129 remove_proc_entry(name_conf
, vn
->proc_vlan_dir
);
131 if (vn
->proc_vlan_dir
)
132 proc_net_remove(net
, name_root
);
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...
140 * Create /proc/net/vlan entries
143 int vlan_proc_init(struct net
*net
)
145 struct vlan_net
*vn
= net_generic(net
, vlan_net_id
);
147 vn
->proc_vlan_dir
= proc_net_mkdir(net
, name_root
, net
->proc_net
);
148 if (!vn
->proc_vlan_dir
)
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
)
158 pr_err("%s: can't create entry in proc filesystem!\n", __func__
);
159 vlan_proc_cleanup(net
);
164 * Add directory entry for VLAN device.
167 int vlan_proc_add_dev(struct net_device
*vlandev
)
169 struct vlan_dev_info
*dev_info
= vlan_dev_info(vlandev
);
170 struct vlan_net
*vn
= net_generic(dev_net(vlandev
), vlan_net_id
);
173 proc_create_data(vlandev
->name
, S_IFREG
|S_IRUSR
|S_IWUSR
,
174 vn
->proc_vlan_dir
, &vlandev_fops
, vlandev
);
181 * Delete directory entry for VLAN device.
183 int vlan_proc_rem_dev(struct net_device
*vlandev
)
185 struct vlan_net
*vn
= net_generic(dev_net(vlandev
), vlan_net_id
);
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
,
191 vlan_dev_info(vlandev
)->dent
= NULL
;
196 /****** Proc filesystem entry points ****************************************/
199 * The following few functions build the content of /proc/net/vlan/config
202 /* start read of /proc/net/vlan/config */
203 static void *vlan_seq_start(struct seq_file
*seq
, loff_t
*pos
)
204 __acquires(dev_base_lock
)
206 struct net_device
*dev
;
207 struct net
*net
= seq_file_net(seq
);
210 read_lock(&dev_base_lock
);
213 return SEQ_START_TOKEN
;
215 for_each_netdev(net
, dev
) {
216 if (!is_vlan_dev(dev
))
226 static void *vlan_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
228 struct net_device
*dev
;
229 struct net
*net
= seq_file_net(seq
);
233 dev
= (struct net_device
*)v
;
234 if (v
== SEQ_START_TOKEN
)
235 dev
= net_device_entry(&net
->dev_base_head
);
237 for_each_netdev_continue(net
, dev
) {
238 if (!is_vlan_dev(dev
))
247 static void vlan_seq_stop(struct seq_file
*seq
, void *v
)
248 __releases(dev_base_lock
)
250 read_unlock(&dev_base_lock
);
253 static int vlan_seq_show(struct seq_file
*seq
, void *v
)
255 struct net
*net
= seq_file_net(seq
);
256 struct vlan_net
*vn
= net_generic(net
, vlan_net_id
);
258 if (v
== SEQ_START_TOKEN
) {
259 const char *nmtype
= NULL
;
261 seq_puts(seq
, "VLAN Dev name | VLAN ID\n");
263 if (vn
->name_type
< ARRAY_SIZE(vlan_name_type_str
))
264 nmtype
= vlan_name_type_str
[vn
->name_type
];
266 seq_printf(seq
, "Name-Type: %s\n",
267 nmtype
? nmtype
: "UNKNOWN");
269 const struct net_device
*vlandev
= v
;
270 const struct vlan_dev_info
*dev_info
= vlan_dev_info(vlandev
);
272 seq_printf(seq
, "%-15s| %d | %s\n", vlandev
->name
,
273 dev_info
->vlan_id
, dev_info
->real_dev
->name
);
278 static int vlandev_seq_show(struct seq_file
*seq
, void *offset
)
280 struct net_device
*vlandev
= (struct net_device
*) seq
->private;
281 const struct vlan_dev_info
*dev_info
= vlan_dev_info(vlandev
);
282 const struct net_device_stats
*stats
;
283 static const char fmt
[] = "%30s %12lu\n";
286 if (!is_vlan_dev(vlandev
))
289 stats
= dev_get_stats(vlandev
);
291 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
292 vlandev
->name
, dev_info
->vlan_id
,
293 (int)(dev_info
->flags
& 1), vlandev
->priv_flags
);
295 seq_printf(seq
, fmt
, "total frames received", stats
->rx_packets
);
296 seq_printf(seq
, fmt
, "total bytes received", stats
->rx_bytes
);
297 seq_printf(seq
, fmt
, "Broadcast/Multicast Rcvd", stats
->multicast
);
299 seq_printf(seq
, fmt
, "total frames transmitted", stats
->tx_packets
);
300 seq_printf(seq
, fmt
, "total bytes transmitted", stats
->tx_bytes
);
301 seq_printf(seq
, fmt
, "total headroom inc",
302 dev_info
->cnt_inc_headroom_on_tx
);
303 seq_printf(seq
, fmt
, "total encap on xmit",
304 dev_info
->cnt_encap_on_xmit
);
305 seq_printf(seq
, "Device: %s", dev_info
->real_dev
->name
);
306 /* now show all PRIORITY mappings relating to this VLAN */
307 seq_printf(seq
, "\nINGRESS priority mappings: "
308 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n",
309 dev_info
->ingress_priority_map
[0],
310 dev_info
->ingress_priority_map
[1],
311 dev_info
->ingress_priority_map
[2],
312 dev_info
->ingress_priority_map
[3],
313 dev_info
->ingress_priority_map
[4],
314 dev_info
->ingress_priority_map
[5],
315 dev_info
->ingress_priority_map
[6],
316 dev_info
->ingress_priority_map
[7]);
318 seq_printf(seq
, " EGRESS priority mappings: ");
319 for (i
= 0; i
< 16; i
++) {
320 const struct vlan_priority_tci_mapping
*mp
321 = dev_info
->egress_priority_map
[i
];
323 seq_printf(seq
, "%u:%hu ",
324 mp
->priority
, ((mp
->vlan_qos
>> 13) & 0x7));