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/config.h> 21 #include <linux/module.h> 22 #include <linux/stddef.h> /* offsetof(), etc. */ 23 #include <linux/errno.h> /* return codes */ 24 #include <linux/kernel.h> 25 #include <linux/slab.h> /* kmalloc(), kfree() */ 26 #include <linux/mm.h> /* verify_area(), etc. */ 27 #include <linux/string.h> /* inline mem*, str* functions */ 28 #include <linux/init.h> /* __initfunc et al. */ 29 #include <asm/byteorder.h> /* htons(), etc. */ 30 #include <asm/uaccess.h> /* copy_to_user */ 31 #include <asm/io.h> 32 #include <linux/proc_fs.h> 33 #include <linux/seq_file.h> 34 #include <linux/fs.h> 35 #include <linux/netdevice.h> 36 #include <linux/if_vlan.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 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 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 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(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, proc_net); 161 if (proc_vlan_dir) { 162 proc_vlan_conf = create_proc_entry(name_conf, 163 S_IFREG|S_IRUSR|S_IWUSR, 164 proc_vlan_dir); 165 if (proc_vlan_conf) { 166 proc_vlan_conf->proc_fops = &vlan_fops; 167 return 0; 168 } 169 } 170 vlan_proc_cleanup(); 171 return -ENOBUFS; 172 } 173 174 /* 175 * Add directory entry for VLAN device. 176 */ 177 178 int vlan_proc_add_dev (struct net_device *vlandev) 179 { 180 struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); 181 182 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) { 183 printk(KERN_ERR 184 "ERROR: vlan_proc_add, device -:%s:- is NOT a VLAN\n", 185 vlandev->name); 186 return -EINVAL; 187 } 188 189 dev_info->dent = create_proc_entry(vlandev->name, 190 S_IFREG|S_IRUSR|S_IWUSR, 191 proc_vlan_dir); 192 if (!dev_info->dent) 193 return -ENOBUFS; 194 195 dev_info->dent->proc_fops = &vlandev_fops; 196 dev_info->dent->data = vlandev; 197 198 #ifdef VLAN_DEBUG 199 printk(KERN_ERR "vlan_proc_add, device -:%s:- being added.\n", 200 vlandev->name); 201 #endif 202 return 0; 203 } 204 205 /* 206 * Delete directory entry for VLAN device. 207 */ 208 int vlan_proc_rem_dev(struct net_device *vlandev) 209 { 210 if (!vlandev) { 211 printk(VLAN_ERR "%s: invalid argument: %p\n", 212 __FUNCTION__, vlandev); 213 return -EINVAL; 214 } 215 216 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) { 217 printk(VLAN_DBG "%s: invalid argument, device: %s is not a VLAN device, priv_flags: 0x%4hX.\n", 218 __FUNCTION__, vlandev->name, vlandev->priv_flags); 219 return -EINVAL; 220 } 221 222 #ifdef VLAN_DEBUG 223 printk(VLAN_DBG "%s: dev: %p\n", __FUNCTION__, vlandev); 224 #endif 225 226 /** NOTE: This will consume the memory pointed to by dent, it seems. */ 227 if (VLAN_DEV_INFO(vlandev)->dent) { 228 remove_proc_entry(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir); 229 VLAN_DEV_INFO(vlandev)->dent = NULL; 230 } 231 232 return 0; 233 } 234 235 /****** Proc filesystem entry points ****************************************/ 236 237 /* 238 * The following few functions build the content of /proc/net/vlan/config 239 */ 240 241 /* starting at dev, find a VLAN device */ 242 static struct net_device *vlan_skip(struct net_device *dev) 243 { 244 while (dev && !(dev->priv_flags & IFF_802_1Q_VLAN)) 245 dev = dev->next; 246 247 return dev; 248 } 249 250 /* start read of /proc/net/vlan/config */ 251 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) 252 { 253 struct net_device *dev; 254 loff_t i = 1; 255 256 read_lock(&dev_base_lock); 257 258 if (*pos == 0) 259 return SEQ_START_TOKEN; 260 261 for (dev = vlan_skip(dev_base); dev && i < *pos; 262 dev = vlan_skip(dev->next), ++i); 263 264 return (i == *pos) ? dev : NULL; 265 } 266 267 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) 268 { 269 ++*pos; 270 271 return vlan_skip((v == SEQ_START_TOKEN) 272 ? dev_base 273 : ((struct net_device *)v)->next); 274 } 275 276 static void vlan_seq_stop(struct seq_file *seq, void *v) 277 { 278 read_unlock(&dev_base_lock); 279 } 280 281 static int vlan_seq_show(struct seq_file *seq, void *v) 282 { 283 if (v == SEQ_START_TOKEN) { 284 const char *nmtype = NULL; 285 286 seq_puts(seq, "VLAN Dev name | VLAN ID\n"); 287 288 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str)) 289 nmtype = vlan_name_type_str[vlan_name_type]; 290 291 seq_printf(seq, "Name-Type: %s\n", 292 nmtype ? nmtype : "UNKNOWN" ); 293 } else { 294 const struct net_device *vlandev = v; 295 const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); 296 297 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, 298 dev_info->vlan_id, dev_info->real_dev->name); 299 } 300 return 0; 301 } 302 303 static int vlandev_seq_show(struct seq_file *seq, void *offset) 304 { 305 struct net_device *vlandev = (struct net_device *) seq->private; 306 const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); 307 struct net_device_stats *stats; 308 static const char fmt[] = "%30s %12lu\n"; 309 int i; 310 311 if ((vlandev == NULL) || (!(vlandev->priv_flags & IFF_802_1Q_VLAN))) 312 return 0; 313 314 seq_printf(seq, "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", 315 vlandev->name, dev_info->vlan_id, 316 (int)(dev_info->flags & 1), vlandev->priv_flags); 317 318 319 stats = vlan_dev_get_stats(vlandev); 320 321 seq_printf(seq, fmt, "total frames received", stats->rx_packets); 322 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes); 323 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast); 324 seq_puts(seq, "\n"); 325 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets); 326 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes); 327 seq_printf(seq, fmt, "total headroom inc", 328 dev_info->cnt_inc_headroom_on_tx); 329 seq_printf(seq, fmt, "total encap on xmit", 330 dev_info->cnt_encap_on_xmit); 331 seq_printf(seq, "Device: %s", dev_info->real_dev->name); 332 /* now show all PRIORITY mappings relating to this VLAN */ 333 seq_printf(seq, 334 "\nINGRESS priority mappings: 0:%lu 1:%lu 2:%lu 3:%lu 4:%lu 5:%lu 6:%lu 7:%lu\n", 335 dev_info->ingress_priority_map[0], 336 dev_info->ingress_priority_map[1], 337 dev_info->ingress_priority_map[2], 338 dev_info->ingress_priority_map[3], 339 dev_info->ingress_priority_map[4], 340 dev_info->ingress_priority_map[5], 341 dev_info->ingress_priority_map[6], 342 dev_info->ingress_priority_map[7]); 343 344 seq_printf(seq, "EGRESSS priority Mappings: "); 345 for (i = 0; i < 16; i++) { 346 const struct vlan_priority_tci_mapping *mp 347 = dev_info->egress_priority_map[i]; 348 while (mp) { 349 seq_printf(seq, "%lu:%hu ", 350 mp->priority, ((mp->vlan_qos >> 13) & 0x7)); 351 mp = mp->next; 352 } 353 } 354 seq_puts(seq, "\n"); 355 356 return 0; 357 } 358