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1da177e4 LT |
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 | ||
1da177e4 LT |
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() */ | |
e49332bd | 25 | #include <linux/mm.h> |
1da177e4 LT |
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> | |
457c4cbc | 36 | #include <net/net_namespace.h> |
1da177e4 LT |
37 | #include "vlanproc.h" |
38 | #include "vlan.h" | |
39 | ||
40 | /****** Function Prototypes *************************************************/ | |
41 | ||
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); | |
48 | ||
49 | /* | |
50 | * Global Data | |
51 | */ | |
52 | ||
53 | ||
54 | /* | |
122952fc | 55 | * Names of the proc directory entries |
1da177e4 LT |
56 | */ |
57 | ||
58 | static const char name_root[] = "vlan"; | |
59 | static const char name_conf[] = "config"; | |
60 | ||
61 | /* | |
62 | * Structures for interfacing with the /proc filesystem. | |
63 | * VLAN creates its own directory /proc/net/vlan with the folowing | |
64 | * entries: | |
65 | * config device status/configuration | |
66 | * <device> entry for each device | |
67 | */ | |
68 | ||
69 | /* | |
122952fc | 70 | * Generic /proc/net/vlan/<file> file and inode operations |
1da177e4 LT |
71 | */ |
72 | ||
56b3d975 | 73 | static const struct seq_operations vlan_seq_ops = { |
1da177e4 LT |
74 | .start = vlan_seq_start, |
75 | .next = vlan_seq_next, | |
76 | .stop = vlan_seq_stop, | |
77 | .show = vlan_seq_show, | |
78 | }; | |
79 | ||
80 | static int vlan_seq_open(struct inode *inode, struct file *file) | |
81 | { | |
82 | return seq_open(file, &vlan_seq_ops); | |
83 | } | |
84 | ||
9a32144e | 85 | static const struct file_operations vlan_fops = { |
1da177e4 LT |
86 | .owner = THIS_MODULE, |
87 | .open = vlan_seq_open, | |
88 | .read = seq_read, | |
89 | .llseek = seq_lseek, | |
90 | .release = seq_release, | |
91 | }; | |
92 | ||
93 | /* | |
94 | * /proc/net/vlan/<device> file and inode operations | |
95 | */ | |
96 | ||
97 | static int vlandev_seq_open(struct inode *inode, struct file *file) | |
98 | { | |
99 | return single_open(file, vlandev_seq_show, PDE(inode)->data); | |
100 | } | |
101 | ||
9a32144e | 102 | static const struct file_operations vlandev_fops = { |
1da177e4 LT |
103 | .owner = THIS_MODULE, |
104 | .open = vlandev_seq_open, | |
105 | .read = seq_read, | |
106 | .llseek = seq_lseek, | |
107 | .release = single_release, | |
108 | }; | |
109 | ||
110 | /* | |
111 | * Proc filesystem derectory entries. | |
112 | */ | |
113 | ||
114 | /* | |
122952fc | 115 | * /proc/net/vlan |
1da177e4 LT |
116 | */ |
117 | ||
118 | static struct proc_dir_entry *proc_vlan_dir; | |
119 | ||
120 | /* | |
122952fc | 121 | * /proc/net/vlan/config |
1da177e4 LT |
122 | */ |
123 | ||
124 | static struct proc_dir_entry *proc_vlan_conf; | |
125 | ||
126 | /* Strings */ | |
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", | |
132 | }; | |
133 | /* | |
134 | * Interface functions | |
135 | */ | |
136 | ||
137 | /* | |
138 | * Clean up /proc/net/vlan entries | |
139 | */ | |
140 | ||
141 | void vlan_proc_cleanup(void) | |
142 | { | |
143 | if (proc_vlan_conf) | |
144 | remove_proc_entry(name_conf, proc_vlan_dir); | |
145 | ||
146 | if (proc_vlan_dir) | |
457c4cbc | 147 | proc_net_remove(&init_net, name_root); |
1da177e4 LT |
148 | |
149 | /* Dynamically added entries should be cleaned up as their vlan_device | |
150 | * is removed, so we should not have to take care of it here... | |
151 | */ | |
152 | } | |
153 | ||
154 | /* | |
155 | * Create /proc/net/vlan entries | |
156 | */ | |
157 | ||
158 | int __init vlan_proc_init(void) | |
159 | { | |
457c4cbc | 160 | proc_vlan_dir = proc_mkdir(name_root, init_net.proc_net); |
69ab4b7d PM |
161 | if (!proc_vlan_dir) |
162 | goto err; | |
163 | ||
164 | proc_vlan_conf = create_proc_entry(name_conf, S_IFREG|S_IRUSR|S_IWUSR, | |
165 | proc_vlan_dir); | |
166 | if (!proc_vlan_conf) | |
167 | goto err; | |
168 | proc_vlan_conf->proc_fops = &vlan_fops; | |
169 | return 0; | |
170 | ||
171 | err: | |
172 | pr_err("%s: can't create entry in proc filesystem!\n", __FUNCTION__); | |
1da177e4 LT |
173 | vlan_proc_cleanup(); |
174 | return -ENOBUFS; | |
175 | } | |
176 | ||
177 | /* | |
178 | * Add directory entry for VLAN device. | |
179 | */ | |
180 | ||
181 | int vlan_proc_add_dev (struct net_device *vlandev) | |
182 | { | |
183 | struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); | |
184 | ||
1da177e4 LT |
185 | dev_info->dent = create_proc_entry(vlandev->name, |
186 | S_IFREG|S_IRUSR|S_IWUSR, | |
187 | proc_vlan_dir); | |
188 | if (!dev_info->dent) | |
189 | return -ENOBUFS; | |
190 | ||
191 | dev_info->dent->proc_fops = &vlandev_fops; | |
192 | dev_info->dent->data = vlandev; | |
1da177e4 LT |
193 | return 0; |
194 | } | |
195 | ||
196 | /* | |
197 | * Delete directory entry for VLAN device. | |
198 | */ | |
199 | int vlan_proc_rem_dev(struct net_device *vlandev) | |
200 | { | |
1da177e4 LT |
201 | /** NOTE: This will consume the memory pointed to by dent, it seems. */ |
202 | if (VLAN_DEV_INFO(vlandev)->dent) { | |
203 | remove_proc_entry(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir); | |
204 | VLAN_DEV_INFO(vlandev)->dent = NULL; | |
205 | } | |
1da177e4 LT |
206 | return 0; |
207 | } | |
208 | ||
209 | /****** Proc filesystem entry points ****************************************/ | |
210 | ||
211 | /* | |
212 | * The following few functions build the content of /proc/net/vlan/config | |
213 | */ | |
214 | ||
7562f876 | 215 | static inline int is_vlan_dev(struct net_device *dev) |
1da177e4 | 216 | { |
7562f876 | 217 | return dev->priv_flags & IFF_802_1Q_VLAN; |
1da177e4 LT |
218 | } |
219 | ||
122952fc | 220 | /* start read of /proc/net/vlan/config */ |
1da177e4 LT |
221 | static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) |
222 | { | |
223 | struct net_device *dev; | |
224 | loff_t i = 1; | |
225 | ||
226 | read_lock(&dev_base_lock); | |
227 | ||
228 | if (*pos == 0) | |
229 | return SEQ_START_TOKEN; | |
122952fc | 230 | |
881d966b | 231 | for_each_netdev(&init_net, dev) { |
7562f876 PE |
232 | if (!is_vlan_dev(dev)) |
233 | continue; | |
234 | ||
235 | if (i++ == *pos) | |
236 | return dev; | |
237 | } | |
122952fc | 238 | |
7562f876 | 239 | return NULL; |
122952fc | 240 | } |
1da177e4 LT |
241 | |
242 | static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
243 | { | |
7562f876 PE |
244 | struct net_device *dev; |
245 | ||
1da177e4 LT |
246 | ++*pos; |
247 | ||
7562f876 PE |
248 | dev = (struct net_device *)v; |
249 | if (v == SEQ_START_TOKEN) | |
881d966b | 250 | dev = net_device_entry(&init_net.dev_base_head); |
7562f876 | 251 | |
881d966b | 252 | for_each_netdev_continue(&init_net, dev) { |
7562f876 PE |
253 | if (!is_vlan_dev(dev)) |
254 | continue; | |
255 | ||
256 | return dev; | |
257 | } | |
258 | ||
259 | return NULL; | |
1da177e4 LT |
260 | } |
261 | ||
262 | static void vlan_seq_stop(struct seq_file *seq, void *v) | |
263 | { | |
264 | read_unlock(&dev_base_lock); | |
265 | } | |
266 | ||
267 | static int vlan_seq_show(struct seq_file *seq, void *v) | |
268 | { | |
269 | if (v == SEQ_START_TOKEN) { | |
270 | const char *nmtype = NULL; | |
271 | ||
272 | seq_puts(seq, "VLAN Dev name | VLAN ID\n"); | |
273 | ||
274 | if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str)) | |
275 | nmtype = vlan_name_type_str[vlan_name_type]; | |
276 | ||
122952fc | 277 | seq_printf(seq, "Name-Type: %s\n", |
1da177e4 LT |
278 | nmtype ? nmtype : "UNKNOWN" ); |
279 | } else { | |
280 | const struct net_device *vlandev = v; | |
281 | const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); | |
282 | ||
122952fc | 283 | seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, |
1da177e4 LT |
284 | dev_info->vlan_id, dev_info->real_dev->name); |
285 | } | |
286 | return 0; | |
287 | } | |
288 | ||
289 | static int vlandev_seq_show(struct seq_file *seq, void *offset) | |
290 | { | |
291 | struct net_device *vlandev = (struct net_device *) seq->private; | |
292 | const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); | |
7bd38d77 | 293 | struct net_device_stats *stats = &vlandev->stats; |
1da177e4 LT |
294 | static const char fmt[] = "%30s %12lu\n"; |
295 | int i; | |
296 | ||
16f3051b | 297 | if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) |
1da177e4 LT |
298 | return 0; |
299 | ||
300 | seq_printf(seq, "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", | |
301 | vlandev->name, dev_info->vlan_id, | |
302 | (int)(dev_info->flags & 1), vlandev->priv_flags); | |
303 | ||
1da177e4 LT |
304 | seq_printf(seq, fmt, "total frames received", stats->rx_packets); |
305 | seq_printf(seq, fmt, "total bytes received", stats->rx_bytes); | |
306 | seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast); | |
307 | seq_puts(seq, "\n"); | |
308 | seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets); | |
309 | seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes); | |
122952fc | 310 | seq_printf(seq, fmt, "total headroom inc", |
1da177e4 | 311 | dev_info->cnt_inc_headroom_on_tx); |
122952fc | 312 | seq_printf(seq, fmt, "total encap on xmit", |
1da177e4 LT |
313 | dev_info->cnt_encap_on_xmit); |
314 | seq_printf(seq, "Device: %s", dev_info->real_dev->name); | |
315 | /* now show all PRIORITY mappings relating to this VLAN */ | |
122952fc | 316 | seq_printf(seq, |
734423cf | 317 | "\nINGRESS priority mappings: 0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", |
1da177e4 LT |
318 | dev_info->ingress_priority_map[0], |
319 | dev_info->ingress_priority_map[1], | |
320 | dev_info->ingress_priority_map[2], | |
321 | dev_info->ingress_priority_map[3], | |
322 | dev_info->ingress_priority_map[4], | |
323 | dev_info->ingress_priority_map[5], | |
324 | dev_info->ingress_priority_map[6], | |
325 | dev_info->ingress_priority_map[7]); | |
326 | ||
327 | seq_printf(seq, "EGRESSS priority Mappings: "); | |
328 | for (i = 0; i < 16; i++) { | |
329 | const struct vlan_priority_tci_mapping *mp | |
330 | = dev_info->egress_priority_map[i]; | |
331 | while (mp) { | |
734423cf | 332 | seq_printf(seq, "%u:%hu ", |
1da177e4 LT |
333 | mp->priority, ((mp->vlan_qos >> 13) & 0x7)); |
334 | mp = mp->next; | |
335 | } | |
336 | } | |
337 | seq_puts(seq, "\n"); | |
338 | ||
339 | return 0; | |
340 | } |