err.no Git - linux-2.6/blob - net/8021q/vlanproc.c

   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(struct net *net)
 142 {
 143         if (net != &init_net)
 144                 return;
 145
 146         if (proc_vlan_conf)
 147                 remove_proc_entry(name_conf, proc_vlan_dir);
 148
 149         if (proc_vlan_dir)
 150                 proc_net_remove(&init_net, name_root);
 151
 152         /* Dynamically added entries should be cleaned up as their vlan_device
 153          * is removed, so we should not have to take care of it here...
 154          */
 155 }
 156
 157 /*
 158  *      Create /proc/net/vlan entries
 159  */
 160
 161 int vlan_proc_init(struct net *net)
 162 {
 163         if (net != &init_net)
 164                 return 0;
 165
 166         proc_vlan_dir = proc_mkdir(name_root, init_net.proc_net);
 167         if (!proc_vlan_dir)
 168                 goto err;
 169
 170         proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
 171                                      proc_vlan_dir, &vlan_fops);
 172         if (!proc_vlan_conf)
 173                 goto err;
 174         return 0;
 175
 176 err:
 177         pr_err("%s: can't create entry in proc filesystem!\n", __func__);
 178         vlan_proc_cleanup(net);
 179         return -ENOBUFS;
 180 }
 181
 182 /*
 183  *      Add directory entry for VLAN device.
 184  */
 185
 186 int vlan_proc_add_dev(struct net_device *vlandev)
 187 {
 188         struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
 189
 190         dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
 191                                      proc_vlan_dir, &vlandev_fops);
 192         if (!dev_info->dent)
 193                 return -ENOBUFS;
 194
 195         dev_info->dent->data = vlandev;
 196         return 0;
 197 }
 198
 199 /*
 200  *      Delete directory entry for VLAN device.
 201  */
 202 int vlan_proc_rem_dev(struct net_device *vlandev)
 203 {
 204         /** NOTE:  This will consume the memory pointed to by dent, it seems. */
 205         if (vlan_dev_info(vlandev)->dent) {
 206                 remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
 207                                   proc_vlan_dir);
 208                 vlan_dev_info(vlandev)->dent = NULL;
 209         }
 210         return 0;
 211 }
 212
 213 /****** Proc filesystem entry points ****************************************/
 214
 215 /*
 216  * The following few functions build the content of /proc/net/vlan/config
 217  */
 218
 219 /* start read of /proc/net/vlan/config */
 220 static void *vlan_seq_start(struct seq_file *seq, loff_t *pos)
 221         __acquires(dev_base_lock)
 222 {
 223         struct net_device *dev;
 224         loff_t i = 1;
 225
 226         read_lock(&dev_base_lock);
 227
 228         if (*pos == 0)
 229                 return SEQ_START_TOKEN;
 230
 231         for_each_netdev(&init_net, dev) {
 232                 if (!is_vlan_dev(dev))
 233                         continue;
 234
 235                 if (i++ == *pos)
 236                         return dev;
 237         }
 238
 239         return  NULL;
 240 }
 241
 242 static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 243 {
 244         struct net_device *dev;
 245
 246         ++*pos;
 247
 248         dev = (struct net_device *)v;
 249         if (v == SEQ_START_TOKEN)
 250                 dev = net_device_entry(&init_net.dev_base_head);
 251
 252         for_each_netdev_continue(&init_net, dev) {
 253                 if (!is_vlan_dev(dev))
 254                         continue;
 255
 256                 return dev;
 257         }
 258
 259         return NULL;
 260 }
 261
 262 static void vlan_seq_stop(struct seq_file *seq, void *v)
 263         __releases(dev_base_lock)
 264 {
 265         read_unlock(&dev_base_lock);
 266 }
 267
 268 static int vlan_seq_show(struct seq_file *seq, void *v)
 269 {
 270         if (v == SEQ_START_TOKEN) {
 271                 const char *nmtype = NULL;
 272
 273                 seq_puts(seq, "VLAN Dev name     | VLAN ID\n");
 274
 275                 if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str))
 276                     nmtype =  vlan_name_type_str[vlan_name_type];
 277
 278                 seq_printf(seq, "Name-Type: %s\n",
 279                            nmtype ? nmtype :  "UNKNOWN");
 280         } else {
 281                 const struct net_device *vlandev = v;
 282                 const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
 283
 284                 seq_printf(seq, "%-15s| %d  | %s\n",  vlandev->name,
 285                            dev_info->vlan_id,    dev_info->real_dev->name);
 286         }
 287         return 0;
 288 }
 289
 290 static int vlandev_seq_show(struct seq_file *seq, void *offset)
 291 {
 292         struct net_device *vlandev = (struct net_device *) seq->private;
 293         const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
 294         struct net_device_stats *stats = &vlandev->stats;
 295         static const char fmt[] = "%30s %12lu\n";
 296         int i;
 297
 298         if (!(vlandev->priv_flags & IFF_802_1Q_VLAN))
 299                 return 0;
 300
 301         seq_printf(seq,
 302                    "%s  VID: %d  REORDER_HDR: %i  dev->priv_flags: %hx\n",
 303                    vlandev->name, dev_info->vlan_id,
 304                    (int)(dev_info->flags & 1), vlandev->priv_flags);
 305
 306         seq_printf(seq, fmt, "total frames received", stats->rx_packets);
 307         seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
 308         seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
 309         seq_puts(seq, "\n");
 310         seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
 311         seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
 312         seq_printf(seq, fmt, "total headroom inc",
 313                    dev_info->cnt_inc_headroom_on_tx);
 314         seq_printf(seq, fmt, "total encap on xmit",
 315                    dev_info->cnt_encap_on_xmit);
 316         seq_printf(seq, "Device: %s", dev_info->real_dev->name);
 317         /* now show all PRIORITY mappings relating to this VLAN */
 318         seq_printf(seq, "\nINGRESS priority mappings: "
 319                         "0:%u  1:%u  2:%u  3:%u  4:%u  5:%u  6:%u 7:%u\n",
 320                    dev_info->ingress_priority_map[0],
 321                    dev_info->ingress_priority_map[1],
 322                    dev_info->ingress_priority_map[2],
 323                    dev_info->ingress_priority_map[3],
 324                    dev_info->ingress_priority_map[4],
 325                    dev_info->ingress_priority_map[5],
 326                    dev_info->ingress_priority_map[6],
 327                    dev_info->ingress_priority_map[7]);
 328
 329         seq_printf(seq, "EGRESSS priority Mappings: ");
 330         for (i = 0; i < 16; i++) {
 331                 const struct vlan_priority_tci_mapping *mp
 332                         = dev_info->egress_priority_map[i];
 333                 while (mp) {
 334                         seq_printf(seq, "%u:%hu ",
 335                                    mp->priority, ((mp->vlan_qos >> 13) & 0x7));
 336                         mp = mp->next;
 337                 }
 338         }
 339         seq_puts(seq, "\n");
 340
 341         return 0;
 342 }