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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /****************************************************************************** |
3 | * vlanproc.c VLAN Module. /proc filesystem interface. | |
4 | * | |
5 | * This module is completely hardware-independent and provides | |
6 | * access to the router using Linux /proc filesystem. | |
7 | * | |
8 | * Author: Ben Greear, <greearb@candelatech.com> coppied from wanproc.c | |
9 | * by: Gene Kozin <genek@compuserve.com> | |
10 | * | |
11 | * Copyright: (c) 1998 Ben Greear | |
12 | * | |
1da177e4 LT |
13 | * ============================================================================ |
14 | * Jan 20, 1998 Ben Greear Initial Version | |
15 | *****************************************************************************/ | |
16 | ||
afab2d29 JP |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | ||
1da177e4 | 19 | #include <linux/module.h> |
61362766 | 20 | #include <linux/errno.h> |
1da177e4 | 21 | #include <linux/kernel.h> |
61362766 | 22 | #include <linux/string.h> |
1da177e4 LT |
23 | #include <linux/proc_fs.h> |
24 | #include <linux/seq_file.h> | |
25 | #include <linux/fs.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/if_vlan.h> | |
457c4cbc | 28 | #include <net/net_namespace.h> |
a59a8c1c | 29 | #include <net/netns/generic.h> |
1da177e4 LT |
30 | #include "vlanproc.h" |
31 | #include "vlan.h" | |
32 | ||
33 | /****** Function Prototypes *************************************************/ | |
34 | ||
35 | /* Methods for preparing data for reading proc entries */ | |
36 | static int vlan_seq_show(struct seq_file *seq, void *v); | |
37 | static void *vlan_seq_start(struct seq_file *seq, loff_t *pos); | |
38 | static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
39 | static void vlan_seq_stop(struct seq_file *seq, void *); | |
40 | static int vlandev_seq_show(struct seq_file *seq, void *v); | |
41 | ||
42 | /* | |
43 | * Global Data | |
44 | */ | |
45 | ||
46 | ||
47 | /* | |
122952fc | 48 | * Names of the proc directory entries |
1da177e4 LT |
49 | */ |
50 | ||
51 | static const char name_root[] = "vlan"; | |
52 | static const char name_conf[] = "config"; | |
53 | ||
54 | /* | |
55 | * Structures for interfacing with the /proc filesystem. | |
25985edc | 56 | * VLAN creates its own directory /proc/net/vlan with the following |
1da177e4 LT |
57 | * entries: |
58 | * config device status/configuration | |
59 | * <device> entry for each device | |
60 | */ | |
61 | ||
62 | /* | |
122952fc | 63 | * Generic /proc/net/vlan/<file> file and inode operations |
1da177e4 LT |
64 | */ |
65 | ||
56b3d975 | 66 | static const struct seq_operations vlan_seq_ops = { |
1da177e4 LT |
67 | .start = vlan_seq_start, |
68 | .next = vlan_seq_next, | |
69 | .stop = vlan_seq_stop, | |
70 | .show = vlan_seq_show, | |
71 | }; | |
72 | ||
1da177e4 | 73 | /* |
4907cb7b | 74 | * Proc filesystem directory entries. |
1da177e4 LT |
75 | */ |
76 | ||
1da177e4 | 77 | /* Strings */ |
36cbd3dc | 78 | static const char *const vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = { |
2029cc2c PM |
79 | [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID", |
80 | [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD", | |
81 | [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD", | |
82 | [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID", | |
1da177e4 LT |
83 | }; |
84 | /* | |
85 | * Interface functions | |
86 | */ | |
87 | ||
88 | /* | |
89 | * Clean up /proc/net/vlan entries | |
90 | */ | |
91 | ||
cd1c7014 | 92 | void vlan_proc_cleanup(struct net *net) |
1da177e4 | 93 | { |
a59a8c1c | 94 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
cd1c7014 | 95 | |
a59a8c1c PE |
96 | if (vn->proc_vlan_conf) |
97 | remove_proc_entry(name_conf, vn->proc_vlan_dir); | |
1da177e4 | 98 | |
a59a8c1c | 99 | if (vn->proc_vlan_dir) |
ece31ffd | 100 | remove_proc_entry(name_root, net->proc_net); |
1da177e4 LT |
101 | |
102 | /* Dynamically added entries should be cleaned up as their vlan_device | |
103 | * is removed, so we should not have to take care of it here... | |
104 | */ | |
105 | } | |
106 | ||
107 | /* | |
108 | * Create /proc/net/vlan entries | |
109 | */ | |
110 | ||
2c8c1e72 | 111 | int __net_init vlan_proc_init(struct net *net) |
1da177e4 | 112 | { |
a59a8c1c | 113 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
cd1c7014 | 114 | |
a59a8c1c PE |
115 | vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net); |
116 | if (!vn->proc_vlan_dir) | |
69ab4b7d PM |
117 | goto err; |
118 | ||
c3506372 CH |
119 | vn->proc_vlan_conf = proc_create_net(name_conf, S_IFREG | 0600, |
120 | vn->proc_vlan_dir, &vlan_seq_ops, | |
121 | sizeof(struct seq_net_private)); | |
a59a8c1c | 122 | if (!vn->proc_vlan_conf) |
69ab4b7d | 123 | goto err; |
69ab4b7d PM |
124 | return 0; |
125 | ||
126 | err: | |
afab2d29 | 127 | pr_err("can't create entry in proc filesystem!\n"); |
cd1c7014 | 128 | vlan_proc_cleanup(net); |
1da177e4 LT |
129 | return -ENOBUFS; |
130 | } | |
131 | ||
132 | /* | |
133 | * Add directory entry for VLAN device. | |
134 | */ | |
135 | ||
2029cc2c | 136 | int vlan_proc_add_dev(struct net_device *vlandev) |
1da177e4 | 137 | { |
7da82c06 | 138 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
a59a8c1c | 139 | struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); |
1da177e4 | 140 | |
9c5ff24f WC |
141 | if (!strcmp(vlandev->name, name_conf)) |
142 | return -EINVAL; | |
3f3942ac CH |
143 | vlan->dent = proc_create_single_data(vlandev->name, S_IFREG | 0600, |
144 | vn->proc_vlan_dir, vlandev_seq_show, vlandev); | |
7da82c06 | 145 | if (!vlan->dent) |
1da177e4 | 146 | return -ENOBUFS; |
1da177e4 LT |
147 | return 0; |
148 | } | |
149 | ||
150 | /* | |
151 | * Delete directory entry for VLAN device. | |
152 | */ | |
e4999f25 | 153 | void vlan_proc_rem_dev(struct net_device *vlandev) |
1da177e4 | 154 | { |
1da177e4 | 155 | /** NOTE: This will consume the memory pointed to by dent, it seems. */ |
a8ca16ea DH |
156 | proc_remove(vlan_dev_priv(vlandev)->dent); |
157 | vlan_dev_priv(vlandev)->dent = NULL; | |
1da177e4 LT |
158 | } |
159 | ||
160 | /****** Proc filesystem entry points ****************************************/ | |
161 | ||
162 | /* | |
163 | * The following few functions build the content of /proc/net/vlan/config | |
164 | */ | |
165 | ||
122952fc | 166 | /* start read of /proc/net/vlan/config */ |
1da177e4 | 167 | static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) |
9e067597 | 168 | __acquires(rcu) |
1da177e4 LT |
169 | { |
170 | struct net_device *dev; | |
80de2d98 | 171 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
172 | loff_t i = 1; |
173 | ||
9e067597 | 174 | rcu_read_lock(); |
1da177e4 LT |
175 | if (*pos == 0) |
176 | return SEQ_START_TOKEN; | |
122952fc | 177 | |
9e067597 | 178 | for_each_netdev_rcu(net, dev) { |
7562f876 PE |
179 | if (!is_vlan_dev(dev)) |
180 | continue; | |
181 | ||
182 | if (i++ == *pos) | |
183 | return dev; | |
184 | } | |
122952fc | 185 | |
7562f876 | 186 | return NULL; |
122952fc | 187 | } |
1da177e4 LT |
188 | |
189 | static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
190 | { | |
7562f876 | 191 | struct net_device *dev; |
80de2d98 | 192 | struct net *net = seq_file_net(seq); |
7562f876 | 193 | |
1da177e4 LT |
194 | ++*pos; |
195 | ||
ea110733 | 196 | dev = v; |
7562f876 | 197 | if (v == SEQ_START_TOKEN) |
80de2d98 | 198 | dev = net_device_entry(&net->dev_base_head); |
7562f876 | 199 | |
9e067597 | 200 | for_each_netdev_continue_rcu(net, dev) { |
7562f876 PE |
201 | if (!is_vlan_dev(dev)) |
202 | continue; | |
203 | ||
204 | return dev; | |
205 | } | |
206 | ||
207 | return NULL; | |
1da177e4 LT |
208 | } |
209 | ||
210 | static void vlan_seq_stop(struct seq_file *seq, void *v) | |
9e067597 | 211 | __releases(rcu) |
1da177e4 | 212 | { |
9e067597 | 213 | rcu_read_unlock(); |
1da177e4 LT |
214 | } |
215 | ||
216 | static int vlan_seq_show(struct seq_file *seq, void *v) | |
217 | { | |
7a17a2f7 PE |
218 | struct net *net = seq_file_net(seq); |
219 | struct vlan_net *vn = net_generic(net, vlan_net_id); | |
220 | ||
1da177e4 LT |
221 | if (v == SEQ_START_TOKEN) { |
222 | const char *nmtype = NULL; | |
223 | ||
224 | seq_puts(seq, "VLAN Dev name | VLAN ID\n"); | |
225 | ||
7a17a2f7 PE |
226 | if (vn->name_type < ARRAY_SIZE(vlan_name_type_str)) |
227 | nmtype = vlan_name_type_str[vn->name_type]; | |
1da177e4 | 228 | |
122952fc | 229 | seq_printf(seq, "Name-Type: %s\n", |
2029cc2c | 230 | nmtype ? nmtype : "UNKNOWN"); |
1da177e4 LT |
231 | } else { |
232 | const struct net_device *vlandev = v; | |
7da82c06 | 233 | const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
1da177e4 | 234 | |
122952fc | 235 | seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, |
7da82c06 | 236 | vlan->vlan_id, vlan->real_dev->name); |
1da177e4 LT |
237 | } |
238 | return 0; | |
239 | } | |
240 | ||
241 | static int vlandev_seq_show(struct seq_file *seq, void *offset) | |
242 | { | |
243 | struct net_device *vlandev = (struct net_device *) seq->private; | |
7da82c06 | 244 | const struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
28172739 | 245 | struct rtnl_link_stats64 temp; |
be1f3c2c | 246 | const struct rtnl_link_stats64 *stats; |
be1f3c2c | 247 | static const char fmt64[] = "%30s %12llu\n"; |
1da177e4 LT |
248 | int i; |
249 | ||
26a25239 | 250 | if (!is_vlan_dev(vlandev)) |
1da177e4 LT |
251 | return 0; |
252 | ||
28172739 | 253 | stats = dev_get_stats(vlandev, &temp); |
2029cc2c PM |
254 | seq_printf(seq, |
255 | "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", | |
7da82c06 JP |
256 | vlandev->name, vlan->vlan_id, |
257 | (int)(vlan->flags & 1), vlandev->priv_flags); | |
1da177e4 | 258 | |
be1f3c2c BH |
259 | seq_printf(seq, fmt64, "total frames received", stats->rx_packets); |
260 | seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes); | |
261 | seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast); | |
1da177e4 | 262 | seq_puts(seq, "\n"); |
be1f3c2c BH |
263 | seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets); |
264 | seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes); | |
7da82c06 | 265 | seq_printf(seq, "Device: %s", vlan->real_dev->name); |
1da177e4 | 266 | /* now show all PRIORITY mappings relating to this VLAN */ |
2029cc2c PM |
267 | seq_printf(seq, "\nINGRESS priority mappings: " |
268 | "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", | |
7da82c06 JP |
269 | vlan->ingress_priority_map[0], |
270 | vlan->ingress_priority_map[1], | |
271 | vlan->ingress_priority_map[2], | |
272 | vlan->ingress_priority_map[3], | |
273 | vlan->ingress_priority_map[4], | |
274 | vlan->ingress_priority_map[5], | |
275 | vlan->ingress_priority_map[6], | |
276 | vlan->ingress_priority_map[7]); | |
1da177e4 | 277 | |
309f796f | 278 | seq_printf(seq, " EGRESS priority mappings: "); |
1da177e4 LT |
279 | for (i = 0; i < 16; i++) { |
280 | const struct vlan_priority_tci_mapping *mp | |
7da82c06 | 281 | = vlan->egress_priority_map[i]; |
1da177e4 | 282 | while (mp) { |
734423cf | 283 | seq_printf(seq, "%u:%hu ", |
1da177e4 LT |
284 | mp->priority, ((mp->vlan_qos >> 13) & 0x7)); |
285 | mp = mp->next; | |
286 | } | |
287 | } | |
288 | seq_puts(seq, "\n"); | |
289 | ||
290 | return 0; | |
291 | } |