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 <net/netns/generic.h> 38 #include "vlanproc.h" 39 #include "vlan.h" 40 41 /****** Function Prototypes *************************************************/ 42 43 /* Methods for preparing data for reading proc entries */ 44 static int vlan_seq_show(struct seq_file *seq, void *v); 45 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos); 46 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos); 47 static void vlan_seq_stop(struct seq_file *seq, void *); 48 static int vlandev_seq_show(struct seq_file *seq, void *v); 49 50 /* 51 * Global Data 52 */ 53 54 55 /* 56 * Names of the proc directory entries 57 */ 58 59 static const char name_root[] = "vlan"; 60 static const char name_conf[] = "config"; 61 62 /* 63 * Structures for interfacing with the /proc filesystem. 64 * VLAN creates its own directory /proc/net/vlan with the folowing 65 * entries: 66 * config device status/configuration 67 * <device> entry for each device 68 */ 69 70 /* 71 * Generic /proc/net/vlan/<file> file and inode operations 72 */ 73 74 static const struct seq_operations vlan_seq_ops = { 75 .start = vlan_seq_start, 76 .next = vlan_seq_next, 77 .stop = vlan_seq_stop, 78 .show = vlan_seq_show, 79 }; 80 81 static int vlan_seq_open(struct inode *inode, struct file *file) 82 { 83 return seq_open_net(inode, file, &vlan_seq_ops, 84 sizeof(struct seq_net_private)); 85 } 86 87 static const struct file_operations vlan_fops = { 88 .owner = THIS_MODULE, 89 .open = vlan_seq_open, 90 .read = seq_read, 91 .llseek = seq_lseek, 92 .release = seq_release_net, 93 }; 94 95 /* 96 * /proc/net/vlan/<device> file and inode operations 97 */ 98 99 static int vlandev_seq_open(struct inode *inode, struct file *file) 100 { 101 return single_open(file, vlandev_seq_show, PDE(inode)->data); 102 } 103 104 static const struct file_operations vlandev_fops = { 105 .owner = THIS_MODULE, 106 .open = vlandev_seq_open, 107 .read = seq_read, 108 .llseek = seq_lseek, 109 .release = single_release, 110 }; 111 112 /* 113 * Proc filesystem derectory entries. 114 */ 115 116 /* Strings */ 117 static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = { 118 [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID", 119 [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD", 120 [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD", 121 [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID", 122 }; 123 /* 124 * Interface functions 125 */ 126 127 /* 128 * Clean up /proc/net/vlan entries 129 */ 130 131 void vlan_proc_cleanup(struct net *net) 132 { 133 struct vlan_net *vn = net_generic(net, vlan_net_id); 134 135 if (vn->proc_vlan_conf) 136 remove_proc_entry(name_conf, vn->proc_vlan_dir); 137 138 if (vn->proc_vlan_dir) 139 proc_net_remove(net, name_root); 140 141 /* Dynamically added entries should be cleaned up as their vlan_device 142 * is removed, so we should not have to take care of it here... 143 */ 144 } 145 146 /* 147 * Create /proc/net/vlan entries 148 */ 149 150 int vlan_proc_init(struct net *net) 151 { 152 struct vlan_net *vn = net_generic(net, vlan_net_id); 153 154 vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net); 155 if (!vn->proc_vlan_dir) 156 goto err; 157 158 vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR, 159 vn->proc_vlan_dir, &vlan_fops); 160 if (!vn->proc_vlan_conf) 161 goto err; 162 return 0; 163 164 err: 165 pr_err("%s: can't create entry in proc filesystem!\n", __func__); 166 vlan_proc_cleanup(net); 167 return -ENOBUFS; 168 } 169 170 /* 171 * Add directory entry for VLAN device. 172 */ 173 174 int vlan_proc_add_dev(struct net_device *vlandev) 175 { 176 struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); 177 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); 178 179 dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR, 180 vn->proc_vlan_dir, &vlandev_fops); 181 if (!dev_info->dent) 182 return -ENOBUFS; 183 184 dev_info->dent->data = vlandev; 185 return 0; 186 } 187 188 /* 189 * Delete directory entry for VLAN device. 190 */ 191 int vlan_proc_rem_dev(struct net_device *vlandev) 192 { 193 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); 194 195 /** NOTE: This will consume the memory pointed to by dent, it seems. */ 196 if (vlan_dev_info(vlandev)->dent) { 197 remove_proc_entry(vlan_dev_info(vlandev)->dent->name, 198 vn->proc_vlan_dir); 199 vlan_dev_info(vlandev)->dent = NULL; 200 } 201 return 0; 202 } 203 204 /****** Proc filesystem entry points ****************************************/ 205 206 /* 207 * The following few functions build the content of /proc/net/vlan/config 208 */ 209 210 /* start read of /proc/net/vlan/config */ 211 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) 212 __acquires(dev_base_lock) 213 { 214 struct net_device *dev; 215 struct net *net = seq_file_net(seq); 216 loff_t i = 1; 217 218 read_lock(&dev_base_lock); 219 220 if (*pos == 0) 221 return SEQ_START_TOKEN; 222 223 for_each_netdev(net, dev) { 224 if (!is_vlan_dev(dev)) 225 continue; 226 227 if (i++ == *pos) 228 return dev; 229 } 230 231 return NULL; 232 } 233 234 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) 235 { 236 struct net_device *dev; 237 struct net *net = seq_file_net(seq); 238 239 ++*pos; 240 241 dev = (struct net_device *)v; 242 if (v == SEQ_START_TOKEN) 243 dev = net_device_entry(&net->dev_base_head); 244 245 for_each_netdev_continue(net, dev) { 246 if (!is_vlan_dev(dev)) 247 continue; 248 249 return dev; 250 } 251 252 return NULL; 253 } 254 255 static void vlan_seq_stop(struct seq_file *seq, void *v) 256 __releases(dev_base_lock) 257 { 258 read_unlock(&dev_base_lock); 259 } 260 261 static int vlan_seq_show(struct seq_file *seq, void *v) 262 { 263 struct net *net = seq_file_net(seq); 264 struct vlan_net *vn = net_generic(net, vlan_net_id); 265 266 if (v == SEQ_START_TOKEN) { 267 const char *nmtype = NULL; 268 269 seq_puts(seq, "VLAN Dev name | VLAN ID\n"); 270 271 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str)) 272 nmtype = vlan_name_type_str[vn->name_type]; 273 274 seq_printf(seq, "Name-Type: %s\n", 275 nmtype ? nmtype : "UNKNOWN"); 276 } else { 277 const struct net_device *vlandev = v; 278 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); 279 280 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, 281 dev_info->vlan_id, dev_info->real_dev->name); 282 } 283 return 0; 284 } 285 286 static int vlandev_seq_show(struct seq_file *seq, void *offset) 287 { 288 struct net_device *vlandev = (struct net_device *) seq->private; 289 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); 290 struct net_device_stats *stats = &vlandev->stats; 291 static const char fmt[] = "%30s %12lu\n"; 292 int i; 293 294 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) 295 return 0; 296 297 seq_printf(seq, 298 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", 299 vlandev->name, dev_info->vlan_id, 300 (int)(dev_info->flags & 1), vlandev->priv_flags); 301 302 seq_printf(seq, fmt, "total frames received", stats->rx_packets); 303 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes); 304 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast); 305 seq_puts(seq, "\n"); 306 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets); 307 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes); 308 seq_printf(seq, fmt, "total headroom inc", 309 dev_info->cnt_inc_headroom_on_tx); 310 seq_printf(seq, fmt, "total encap on xmit", 311 dev_info->cnt_encap_on_xmit); 312 seq_printf(seq, "Device: %s", dev_info->real_dev->name); 313 /* now show all PRIORITY mappings relating to this VLAN */ 314 seq_printf(seq, "\nINGRESS priority mappings: " 315 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", 316 dev_info->ingress_priority_map[0], 317 dev_info->ingress_priority_map[1], 318 dev_info->ingress_priority_map[2], 319 dev_info->ingress_priority_map[3], 320 dev_info->ingress_priority_map[4], 321 dev_info->ingress_priority_map[5], 322 dev_info->ingress_priority_map[6], 323 dev_info->ingress_priority_map[7]); 324 325 seq_printf(seq, "EGRESSS priority Mappings: "); 326 for (i = 0; i < 16; i++) { 327 const struct vlan_priority_tci_mapping *mp 328 = dev_info->egress_priority_map[i]; 329 while (mp) { 330 seq_printf(seq, "%u:%hu ", 331 mp->priority, ((mp->vlan_qos >> 13) & 0x7)); 332 mp = mp->next; 333 } 334 } 335 seq_puts(seq, "\n"); 336 337 return 0; 338 } 339