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 = 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__); 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); 184 185 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; 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 { 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, 204 proc_vlan_dir); 205 vlan_dev_info(vlandev)->dent = NULL; 206 } 207 return 0; 208 } 209 210 /****** Proc filesystem entry points ****************************************/ 211 212 /* 213 * The following few functions build the content of /proc/net/vlan/config 214 */ 215 216 static inline int is_vlan_dev(struct net_device *dev) 217 { 218 return dev->priv_flags & IFF_802_1Q_VLAN; 219 } 220 221 /* start read of /proc/net/vlan/config */ 222 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) 223 __acquires(dev_base_lock) 224 { 225 struct net_device *dev; 226 loff_t i = 1; 227 228 read_lock(&dev_base_lock); 229 230 if (*pos == 0) 231 return SEQ_START_TOKEN; 232 233 for_each_netdev(&init_net, dev) { 234 if (!is_vlan_dev(dev)) 235 continue; 236 237 if (i++ == *pos) 238 return dev; 239 } 240 241 return NULL; 242 } 243 244 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) 245 { 246 struct net_device *dev; 247 248 ++*pos; 249 250 dev = (struct net_device *)v; 251 if (v == SEQ_START_TOKEN) 252 dev = net_device_entry(&init_net.dev_base_head); 253 254 for_each_netdev_continue(&init_net, dev) { 255 if (!is_vlan_dev(dev)) 256 continue; 257 258 return dev; 259 } 260 261 return NULL; 262 } 263 264 static void vlan_seq_stop(struct seq_file *seq, void *v) 265 __releases(dev_base_lock) 266 { 267 read_unlock(&dev_base_lock); 268 } 269 270 static int vlan_seq_show(struct seq_file *seq, void *v) 271 { 272 if (v == SEQ_START_TOKEN) { 273 const char *nmtype = NULL; 274 275 seq_puts(seq, "VLAN Dev name | VLAN ID\n"); 276 277 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str)) 278 nmtype = vlan_name_type_str[vlan_name_type]; 279 280 seq_printf(seq, "Name-Type: %s\n", 281 nmtype ? nmtype : "UNKNOWN"); 282 } else { 283 const struct net_device *vlandev = v; 284 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); 285 286 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, 287 dev_info->vlan_id, dev_info->real_dev->name); 288 } 289 return 0; 290 } 291 292 static int vlandev_seq_show(struct seq_file *seq, void *offset) 293 { 294 struct net_device *vlandev = (struct net_device *) seq->private; 295 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); 296 struct net_device_stats *stats = &vlandev->stats; 297 static const char fmt[] = "%30s %12lu\n"; 298 int i; 299 300 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) 301 return 0; 302 303 seq_printf(seq, 304 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", 305 vlandev->name, dev_info->vlan_id, 306 (int)(dev_info->flags & 1), vlandev->priv_flags); 307 308 seq_printf(seq, fmt, "total frames received", stats->rx_packets); 309 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes); 310 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast); 311 seq_puts(seq, "\n"); 312 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets); 313 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes); 314 seq_printf(seq, fmt, "total headroom inc", 315 dev_info->cnt_inc_headroom_on_tx); 316 seq_printf(seq, fmt, "total encap on xmit", 317 dev_info->cnt_encap_on_xmit); 318 seq_printf(seq, "Device: %s", dev_info->real_dev->name); 319 /* now show all PRIORITY mappings relating to this VLAN */ 320 seq_printf(seq, "\nINGRESS priority mappings: " 321 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", 322 dev_info->ingress_priority_map[0], 323 dev_info->ingress_priority_map[1], 324 dev_info->ingress_priority_map[2], 325 dev_info->ingress_priority_map[3], 326 dev_info->ingress_priority_map[4], 327 dev_info->ingress_priority_map[5], 328 dev_info->ingress_priority_map[6], 329 dev_info->ingress_priority_map[7]); 330 331 seq_printf(seq, "EGRESSS priority Mappings: "); 332 for (i = 0; i < 16; i++) { 333 const struct vlan_priority_tci_mapping *mp 334 = dev_info->egress_priority_map[i]; 335 while (mp) { 336 seq_printf(seq, "%u:%hu ", 337 mp->priority, ((mp->vlan_qos >> 13) & 0x7)); 338 mp = mp->next; 339 } 340 } 341 seq_puts(seq, "\n"); 342 343 return 0; 344 } 345