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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 | ||
afab2d29 JP |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
1da177e4 | 22 | #include <linux/module.h> |
61362766 | 23 | #include <linux/errno.h> |
1da177e4 | 24 | #include <linux/kernel.h> |
61362766 | 25 | #include <linux/string.h> |
1da177e4 LT |
26 | #include <linux/proc_fs.h> |
27 | #include <linux/seq_file.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/if_vlan.h> | |
457c4cbc | 31 | #include <net/net_namespace.h> |
a59a8c1c | 32 | #include <net/netns/generic.h> |
1da177e4 LT |
33 | #include "vlanproc.h" |
34 | #include "vlan.h" | |
35 | ||
36 | /****** Function Prototypes *************************************************/ | |
37 | ||
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); | |
44 | ||
45 | /* | |
46 | * Global Data | |
47 | */ | |
48 | ||
49 | ||
50 | /* | |
122952fc | 51 | * Names of the proc directory entries |
1da177e4 LT |
52 | */ |
53 | ||
54 | static const char name_root[] = "vlan"; | |
55 | static const char name_conf[] = "config"; | |
56 | ||
57 | /* | |
58 | * Structures for interfacing with the /proc filesystem. | |
25985edc | 59 | * VLAN creates its own directory /proc/net/vlan with the following |
1da177e4 LT |
60 | * entries: |
61 | * config device status/configuration | |
62 | * <device> entry for each device | |
63 | */ | |
64 | ||
65 | /* | |
122952fc | 66 | * Generic /proc/net/vlan/<file> file and inode operations |
1da177e4 LT |
67 | */ |
68 | ||
56b3d975 | 69 | static const struct seq_operations vlan_seq_ops = { |
1da177e4 LT |
70 | .start = vlan_seq_start, |
71 | .next = vlan_seq_next, | |
72 | .stop = vlan_seq_stop, | |
73 | .show = vlan_seq_show, | |
74 | }; | |
75 | ||
76 | static int vlan_seq_open(struct inode *inode, struct file *file) | |
77 | { | |
80de2d98 PE |
78 | return seq_open_net(inode, file, &vlan_seq_ops, |
79 | sizeof(struct seq_net_private)); | |
1da177e4 LT |
80 | } |
81 | ||
9a32144e | 82 | static const struct file_operations vlan_fops = { |
1da177e4 LT |
83 | .open = vlan_seq_open, |
84 | .read = seq_read, | |
85 | .llseek = seq_lseek, | |
80de2d98 | 86 | .release = seq_release_net, |
1da177e4 LT |
87 | }; |
88 | ||
89 | /* | |
90 | * /proc/net/vlan/<device> file and inode operations | |
91 | */ | |
92 | ||
93 | static int vlandev_seq_open(struct inode *inode, struct file *file) | |
94 | { | |
d9dda78b | 95 | return single_open(file, vlandev_seq_show, PDE_DATA(inode)); |
1da177e4 LT |
96 | } |
97 | ||
9a32144e | 98 | static const struct file_operations vlandev_fops = { |
1da177e4 LT |
99 | .open = vlandev_seq_open, |
100 | .read = seq_read, | |
101 | .llseek = seq_lseek, | |
102 | .release = single_release, | |
103 | }; | |
104 | ||
105 | /* | |
4907cb7b | 106 | * Proc filesystem directory entries. |
1da177e4 LT |
107 | */ |
108 | ||
1da177e4 | 109 | /* Strings */ |
36cbd3dc | 110 | static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = { |
2029cc2c PM |
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", | |
1da177e4 LT |
115 | }; |
116 | /* | |
117 | * Interface functions | |
118 | */ | |
119 | ||
120 | /* | |
121 | * Clean up /proc/net/vlan entries | |
122 | */ | |
123 | ||
cd1c7014 | 124 | void vlan_proc_cleanup(struct net *net) |
1da177e4 | 125 | { |
a59a8c1c | 126 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
cd1c7014 | 127 | |
a59a8c1c PE |
128 | if (vn->proc_vlan_conf) |
129 | remove_proc_entry(name_conf, vn->proc_vlan_dir); | |
1da177e4 | 130 | |
a59a8c1c | 131 | if (vn->proc_vlan_dir) |
ece31ffd | 132 | remove_proc_entry(name_root, net->proc_net); |
1da177e4 LT |
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 | ||
2c8c1e72 | 143 | int __net_init vlan_proc_init(struct net *net) |
1da177e4 | 144 | { |
a59a8c1c | 145 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
cd1c7014 | 146 | |
a59a8c1c PE |
147 | vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net); |
148 | if (!vn->proc_vlan_dir) | |
69ab4b7d PM |
149 | goto err; |
150 | ||
d6444062 JP |
151 | vn->proc_vlan_conf = proc_create(name_conf, S_IFREG | 0600, |
152 | vn->proc_vlan_dir, &vlan_fops); | |
a59a8c1c | 153 | if (!vn->proc_vlan_conf) |
69ab4b7d | 154 | goto err; |
69ab4b7d PM |
155 | return 0; |
156 | ||
157 | err: | |
afab2d29 | 158 | pr_err("can't create entry in proc filesystem!\n"); |
cd1c7014 | 159 | vlan_proc_cleanup(net); |
1da177e4 LT |
160 | return -ENOBUFS; |
161 | } | |
162 | ||
163 | /* | |
164 | * Add directory entry for VLAN device. | |
165 | */ | |
166 | ||
2029cc2c | 167 | int vlan_proc_add_dev(struct net_device *vlandev) |
1da177e4 | 168 | { |
7da82c06 | 169 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
a59a8c1c | 170 | struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); |
1da177e4 | 171 | |
9c5ff24f WC |
172 | if (!strcmp(vlandev->name, name_conf)) |
173 | return -EINVAL; | |
7da82c06 | 174 | vlan->dent = |
d6444062 | 175 | proc_create_data(vlandev->name, S_IFREG | 0600, |
1d3faa39 | 176 | vn->proc_vlan_dir, &vlandev_fops, vlandev); |
7da82c06 | 177 | if (!vlan->dent) |
1da177e4 | 178 | return -ENOBUFS; |
1da177e4 LT |
179 | return 0; |
180 | } | |
181 | ||
182 | /* | |
183 | * Delete directory entry for VLAN device. | |
184 | */ | |
e4999f25 | 185 | void vlan_proc_rem_dev(struct net_device *vlandev) |
1da177e4 | 186 | { |
1da177e4 | 187 | /** NOTE: This will consume the memory pointed to by dent, it seems. */ |
a8ca16ea DH |
188 | proc_remove(vlan_dev_priv(vlandev)->dent); |
189 | vlan_dev_priv(vlandev)->dent = NULL; | |
1da177e4 LT |
190 | } |
191 | ||
192 | /****** Proc filesystem entry points ****************************************/ | |
193 | ||
194 | /* | |
195 | * The following few functions build the content of /proc/net/vlan/config | |
196 | */ | |
197 | ||
122952fc | 198 | /* start read of /proc/net/vlan/config */ |
1da177e4 | 199 | static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) |
9e067597 | 200 | __acquires(rcu) |
1da177e4 LT |
201 | { |
202 | struct net_device *dev; | |
80de2d98 | 203 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
204 | loff_t i = 1; |
205 | ||
9e067597 | 206 | rcu_read_lock(); |
1da177e4 LT |
207 | if (*pos == 0) |
208 | return SEQ_START_TOKEN; | |
122952fc | 209 | |
9e067597 | 210 | for_each_netdev_rcu(net, dev) { |
7562f876 PE |
211 | if (!is_vlan_dev(dev)) |
212 | continue; | |
213 | ||
214 | if (i++ == *pos) | |
215 | return dev; | |
216 | } | |
122952fc | 217 | |
7562f876 | 218 | return NULL; |
122952fc | 219 | } |
1da177e4 LT |
220 | |
221 | static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
222 | { | |
7562f876 | 223 | struct net_device *dev; |
80de2d98 | 224 | struct net *net = seq_file_net(seq); |
7562f876 | 225 | |
1da177e4 LT |
226 | ++*pos; |
227 | ||
ea110733 | 228 | dev = v; |
7562f876 | 229 | if (v == SEQ_START_TOKEN) |
80de2d98 | 230 | dev = net_device_entry(&net->dev_base_head); |
7562f876 | 231 | |
9e067597 | 232 | for_each_netdev_continue_rcu(net, dev) { |
7562f876 PE |
233 | if (!is_vlan_dev(dev)) |
234 | continue; | |
235 | ||
236 | return dev; | |
237 | } | |
238 | ||
239 | return NULL; | |
1da177e4 LT |
240 | } |
241 | ||
242 | static void vlan_seq_stop(struct seq_file *seq, void *v) | |
9e067597 | 243 | __releases(rcu) |
1da177e4 | 244 | { |
9e067597 | 245 | rcu_read_unlock(); |
1da177e4 LT |
246 | } |
247 | ||
248 | static int vlan_seq_show(struct seq_file *seq, void *v) | |
249 | { | |
7a17a2f7 PE |
250 | struct net *net = seq_file_net(seq); |
251 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
252 | ||
1da177e4 LT |
253 | if (v == SEQ_START_TOKEN) { |
254 | const char *nmtype = NULL; | |
255 | ||
256 | seq_puts(seq, "VLAN Dev name | VLAN ID\n"); | |
257 | ||
7a17a2f7 PE |
258 | if (vn->name_type < ARRAY_SIZE(vlan_name_type_str)) |
259 | nmtype = vlan_name_type_str[vn->name_type]; | |
1da177e4 | 260 | |
122952fc | 261 | seq_printf(seq, "Name-Type: %s\n", |
2029cc2c | 262 | nmtype ? nmtype : "UNKNOWN"); |
1da177e4 LT |
263 | } else { |
264 | const struct net_device *vlandev = v; | |
7da82c06 | 265 | const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
1da177e4 | 266 | |
122952fc | 267 | seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, |
7da82c06 | 268 | vlan->vlan_id, vlan->real_dev->name); |
1da177e4 LT |
269 | } |
270 | return 0; | |
271 | } | |
272 | ||
273 | static int vlandev_seq_show(struct seq_file *seq, void *offset) | |
274 | { | |
275 | struct net_device *vlandev = (struct net_device *) seq->private; | |
7da82c06 | 276 | const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
28172739 | 277 | struct rtnl_link_stats64 temp; |
be1f3c2c | 278 | const struct rtnl_link_stats64 *stats; |
be1f3c2c | 279 | static const char fmt64[] = "%30s %12llu\n"; |
1da177e4 LT |
280 | int i; |
281 | ||
26a25239 | 282 | if (!is_vlan_dev(vlandev)) |
1da177e4 LT |
283 | return 0; |
284 | ||
28172739 | 285 | stats = dev_get_stats(vlandev, &temp); |
2029cc2c PM |
286 | seq_printf(seq, |
287 | "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", | |
7da82c06 JP |
288 | vlandev->name, vlan->vlan_id, |
289 | (int)(vlan->flags & 1), vlandev->priv_flags); | |
1da177e4 | 290 | |
be1f3c2c BH |
291 | seq_printf(seq, fmt64, "total frames received", stats->rx_packets); |
292 | seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes); | |
293 | seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast); | |
1da177e4 | 294 | seq_puts(seq, "\n"); |
be1f3c2c BH |
295 | seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets); |
296 | seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes); | |
7da82c06 | 297 | seq_printf(seq, "Device: %s", vlan->real_dev->name); |
1da177e4 | 298 | /* now show all PRIORITY mappings relating to this VLAN */ |
2029cc2c PM |
299 | seq_printf(seq, "\nINGRESS priority mappings: " |
300 | "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", | |
7da82c06 JP |
301 | vlan->ingress_priority_map[0], |
302 | vlan->ingress_priority_map[1], | |
303 | vlan->ingress_priority_map[2], | |
304 | vlan->ingress_priority_map[3], | |
305 | vlan->ingress_priority_map[4], | |
306 | vlan->ingress_priority_map[5], | |
307 | vlan->ingress_priority_map[6], | |
308 | vlan->ingress_priority_map[7]); | |
1da177e4 | 309 | |
309f796f | 310 | seq_printf(seq, " EGRESS priority mappings: "); |
1da177e4 LT |
311 | for (i = 0; i < 16; i++) { |
312 | const struct vlan_priority_tci_mapping *mp | |
7da82c06 | 313 | = vlan->egress_priority_map[i]; |
1da177e4 | 314 | while (mp) { |
734423cf | 315 | seq_printf(seq, "%u:%hu ", |
1da177e4 LT |
316 | mp->priority, ((mp->vlan_qos >> 13) & 0x7)); |
317 | mp = mp->next; | |
318 | } | |
319 | } | |
320 | seq_puts(seq, "\n"); | |
321 | ||
322 | return 0; | |
323 | } |