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 = 180 proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR, 181 vn->proc_vlan_dir, &vlandev_fops, vlandev); 182 if (!dev_info->dent) 183 return -ENOBUFS; 184 return 0; 185 } 186 187 /* 188 * Delete directory entry for VLAN device. 189 */ 190 int vlan_proc_rem_dev(struct net_device *vlandev) 191 { 192 struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); 193 194 /** NOTE: This will consume the memory pointed to by dent, it seems. */ 195 if (vlan_dev_info(vlandev)->dent) { 196 remove_proc_entry(vlan_dev_info(vlandev)->dent->name, 197 vn->proc_vlan_dir); 198 vlan_dev_info(vlandev)->dent = NULL; 199 } 200 return 0; 201 } 202 203 /****** Proc filesystem entry points ****************************************/ 204 205 /* 206 * The following few functions build the content of /proc/net/vlan/config 207 */ 208 209 /* start read of /proc/net/vlan/config */ 210 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) 211 __acquires(dev_base_lock) 212 { 213 struct net_device *dev; 214 struct net *net = seq_file_net(seq); 215 loff_t i = 1; 216 217 read_lock(&dev_base_lock); 218 219 if (*pos == 0) 220 return SEQ_START_TOKEN; 221 222 for_each_netdev(net, dev) { 223 if (!is_vlan_dev(dev)) 224 continue; 225 226 if (i++ == *pos) 227 return dev; 228 } 229 230 return NULL; 231 } 232 233 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) 234 { 235 struct net_device *dev; 236 struct net *net = seq_file_net(seq); 237 238 ++*pos; 239 240 dev = (struct net_device *)v; 241 if (v == SEQ_START_TOKEN) 242 dev = net_device_entry(&net->dev_base_head); 243 244 for_each_netdev_continue(net, dev) { 245 if (!is_vlan_dev(dev)) 246 continue; 247 248 return dev; 249 } 250 251 return NULL; 252 } 253 254 static void vlan_seq_stop(struct seq_file *seq, void *v) 255 __releases(dev_base_lock) 256 { 257 read_unlock(&dev_base_lock); 258 } 259 260 static int vlan_seq_show(struct seq_file *seq, void *v) 261 { 262 struct net *net = seq_file_net(seq); 263 struct vlan_net *vn = net_generic(net, vlan_net_id); 264 265 if (v == SEQ_START_TOKEN) { 266 const char *nmtype = NULL; 267 268 seq_puts(seq, "VLAN Dev name | VLAN ID\n"); 269 270 if (vn->name_type < ARRAY_SIZE(vlan_name_type_str)) 271 nmtype = vlan_name_type_str[vn->name_type]; 272 273 seq_printf(seq, "Name-Type: %s\n", 274 nmtype ? nmtype : "UNKNOWN"); 275 } else { 276 const struct net_device *vlandev = v; 277 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); 278 279 seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, 280 dev_info->vlan_id, dev_info->real_dev->name); 281 } 282 return 0; 283 } 284 285 static int vlandev_seq_show(struct seq_file *seq, void *offset) 286 { 287 struct net_device *vlandev = (struct net_device *) seq->private; 288 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); 289 struct net_device_stats *stats = &vlandev->stats; 290 static const char fmt[] = "%30s %12lu\n"; 291 int i; 292 293 if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) 294 return 0; 295 296 seq_printf(seq, 297 "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", 298 vlandev->name, dev_info->vlan_id, 299 (int)(dev_info->flags & 1), vlandev->priv_flags); 300 301 seq_printf(seq, fmt, "total frames received", stats->rx_packets); 302 seq_printf(seq, fmt, "total bytes received", stats->rx_bytes); 303 seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast); 304 seq_puts(seq, "\n"); 305 seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets); 306 seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes); 307 seq_printf(seq, fmt, "total headroom inc", 308 dev_info->cnt_inc_headroom_on_tx); 309 seq_printf(seq, fmt, "total encap on xmit", 310 dev_info->cnt_encap_on_xmit); 311 seq_printf(seq, "Device: %s", dev_info->real_dev->name); 312 /* now show all PRIORITY mappings relating to this VLAN */ 313 seq_printf(seq, "\nINGRESS priority mappings: " 314 "0:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\n", 315 dev_info->ingress_priority_map[0], 316 dev_info->ingress_priority_map[1], 317 dev_info->ingress_priority_map[2], 318 dev_info->ingress_priority_map[3], 319 dev_info->ingress_priority_map[4], 320 dev_info->ingress_priority_map[5], 321 dev_info->ingress_priority_map[6], 322 dev_info->ingress_priority_map[7]); 323 324 seq_printf(seq, "EGRESSS priority Mappings: "); 325 for (i = 0; i < 16; i++) { 326 const struct vlan_priority_tci_mapping *mp 327 = dev_info->egress_priority_map[i]; 328 while (mp) { 329 seq_printf(seq, "%u:%hu ", 330 mp->priority, ((mp->vlan_qos >> 13) & 0x7)); 331 mp = mp->next; 332 } 333 } 334 seq_puts(seq, "\n"); 335 336 return 0; 337 } 338