| 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 | |
| 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() */ |
| 25 | #include <linux/mm.h> |
| 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> |
| 36 | #include <net/net_namespace.h> |
| 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 | /* |
| 55 | * Names of the proc directory entries |
| 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 | /* |
| 70 | * Generic /proc/net/vlan/<file> file and inode operations |
| 71 | */ |
| 72 | |
| 73 | static const struct seq_operations vlan_seq_ops = { |
| 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 | |
| 85 | static const struct file_operations vlan_fops = { |
| 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 | |
| 102 | static const struct file_operations vlandev_fops = { |
| 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 | /* |
| 115 | * /proc/net/vlan |
| 116 | */ |
| 117 | |
| 118 | static struct proc_dir_entry *proc_vlan_dir; |
| 119 | |
| 120 | /* |
| 121 | * /proc/net/vlan/config |
| 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) |
| 147 | proc_net_remove(&init_net, name_root); |
| 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 | { |
| 160 | proc_vlan_dir = proc_mkdir(name_root, init_net.proc_net); |
| 161 | if (!proc_vlan_dir) |
| 162 | goto err; |
| 163 | |
| 164 | proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR, |
| 165 | proc_vlan_dir, &vlan_fops); |
| 166 | if (!proc_vlan_conf) |
| 167 | goto err; |
| 168 | return 0; |
| 169 | |
| 170 | err: |
| 171 | pr_err("%s: can't create entry in proc filesystem!\n", __FUNCTION__); |
| 172 | vlan_proc_cleanup(); |
| 173 | return -ENOBUFS; |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Add directory entry for VLAN device. |
| 178 | */ |
| 179 | |
| 180 | int vlan_proc_add_dev(struct net_device *vlandev) |
| 181 | { |
| 182 | struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); |
| 183 | |
| 184 | dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR, |
| 185 | proc_vlan_dir, &vlandev_fops); |
| 186 | if (!dev_info->dent) |
| 187 | return -ENOBUFS; |
| 188 | |
| 189 | dev_info->dent->data = vlandev; |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Delete directory entry for VLAN device. |
| 195 | */ |
| 196 | int vlan_proc_rem_dev(struct net_device *vlandev) |
| 197 | { |
| 198 | /** NOTE: This will consume the memory pointed to by dent, it seems. */ |
| 199 | if (vlan_dev_info(vlandev)->dent) { |
| 200 | remove_proc_entry(vlan_dev_info(vlandev)->dent->name, |
| 201 | proc_vlan_dir); |
| 202 | vlan_dev_info(vlandev)->dent = NULL; |
| 203 | } |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | /****** Proc filesystem entry points ****************************************/ |
| 208 | |
| 209 | /* |
| 210 | * The following few functions build the content of /proc/net/vlan/config |
| 211 | */ |
| 212 | |
| 213 | /* start read of /proc/net/vlan/config */ |
| 214 | static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) |
| 215 | __acquires(dev_base_lock) |
| 216 | { |
| 217 | struct net_device *dev; |
| 218 | loff_t i = 1; |
| 219 | |
| 220 | read_lock(&dev_base_lock); |
| 221 | |
| 222 | if (*pos == 0) |
| 223 | return SEQ_START_TOKEN; |
| 224 | |
| 225 | for_each_netdev(&init_net, dev) { |
| 226 | if (!is_vlan_dev(dev)) |
| 227 | continue; |
| 228 | |
| 229 | if (i++ == *pos) |
| 230 | return dev; |
| 231 | } |
| 232 | |
| 233 | return NULL; |
| 234 | } |
| 235 | |
| 236 | static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 237 | { |
| 238 | struct net_device *dev; |
| 239 | |
| 240 | ++*pos; |
| 241 | |
| 242 | dev = (struct net_device *)v; |
| 243 | if (v == SEQ_START_TOKEN) |
| 244 | dev = net_device_entry(&init_net.dev_base_head); |
| 245 | |
| 246 | for_each_netdev_continue(&init_net, dev) { |
| 247 | if (!is_vlan_dev(dev)) |
| 248 | continue; |
| 249 | |
| 250 | return dev; |
| 251 | } |
| 252 | |
| 253 | return NULL; |
| 254 | } |
| 255 | |
| 256 | static void vlan_seq_stop(struct seq_file *seq, void *v) |
| 257 | __releases(dev_base_lock) |
| 258 | { |
| 259 | read_unlock(&dev_base_lock); |
| 260 | } |
| 261 | |
| 262 | static int vlan_seq_show(struct seq_file *seq, void *v) |
| 263 | { |
| 264 | if (v == SEQ_START_TOKEN) { |
| 265 | const char *nmtype = NULL; |
| 266 | |
| 267 | seq_puts(seq, "VLAN Dev name | VLAN ID\n"); |
| 268 | |
| 269 | if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str)) |
| 270 | nmtype = vlan_name_type_str[vlan_name_type]; |
| 271 | |
| 272 | seq_printf(seq, "Name-Type: %s\n", |
| 273 | nmtype ? nmtype : "UNKNOWN"); |
| 274 | } else { |
| 275 | const struct net_device *vlandev = v; |
| 276 | const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); |
| 277 | |
| 278 | seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, |
| 279 | dev_info->vlan_id, dev_info->real_dev->name); |
| 280 | } |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static int vlandev_seq_show(struct seq_file *seq, void *offset) |
| 285 | { |
| 286 | struct net_device *vlandev = (struct net_device *) seq->private; |
| 287 | const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); |
| 288 | struct net_device_stats *stats = &vlandev->stats; |
| 289 | static const char fmt[] = "%30s %12lu\n"; |
| 290 | int i; |
| 291 | |
| 292 | if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) |
| 293 | return 0; |
| 294 | |
| 295 | seq_printf(seq, |
| 296 | "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", |
| 297 | vlandev->name, dev_info->vlan_id, |
| 298 | (int)(dev_info->flags & 1), vlandev->priv_flags); |
| 299 | |
| 300 | seq_printf(seq, fmt, "total frames received", stats->rx_packets); |
| 301 | seq_printf(seq, fmt, "total bytes received", stats->rx_bytes); |
| 302 | seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast); |
| 303 | seq_puts(seq, "\n"); |
| 304 | seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets); |
| 305 | seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes); |
| 306 | seq_printf(seq, fmt, "total headroom inc", |
| 307 | dev_info->cnt_inc_headroom_on_tx); |
| 308 | seq_printf(seq, fmt, "total encap on xmit", |
| 309 | dev_info->cnt_encap_on_xmit); |
| 310 | seq_printf(seq, "Device: %s", dev_info->real_dev->name); |
| 311 | /* now show all PRIORITY mappings relating to this VLAN */ |
| 312 | seq_printf(seq, "\nINGRESS priority mappings: " |
| 313 | "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", |
| 314 | dev_info->ingress_priority_map[0], |
| 315 | dev_info->ingress_priority_map[1], |
| 316 | dev_info->ingress_priority_map[2], |
| 317 | dev_info->ingress_priority_map[3], |
| 318 | dev_info->ingress_priority_map[4], |
| 319 | dev_info->ingress_priority_map[5], |
| 320 | dev_info->ingress_priority_map[6], |
| 321 | dev_info->ingress_priority_map[7]); |
| 322 | |
| 323 | seq_printf(seq, "EGRESSS priority Mappings: "); |
| 324 | for (i = 0; i < 16; i++) { |
| 325 | const struct vlan_priority_tci_mapping *mp |
| 326 | = dev_info->egress_priority_map[i]; |
| 327 | while (mp) { |
| 328 | seq_printf(seq, "%u:%hu ", |
| 329 | mp->priority, ((mp->vlan_qos >> 13) & 0x7)); |
| 330 | mp = mp->next; |
| 331 | } |
| 332 | } |
| 333 | seq_puts(seq, "\n"); |
| 334 | |
| 335 | return 0; |
| 336 | } |