drivers/infiniband/ulp/ipoib/ipoib_vlan.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  * $Id: ipoib_vlan.c 1349 2004-12-16 21:09:43Z roland $
  33  */
  34
  35 #include <linux/module.h>
  36
  37 #include <linux/init.h>
  38 #include <linux/slab.h>
  39 #include <linux/seq_file.h>
  40
  41 #include <asm/uaccess.h>
  42
  43 #include "ipoib.h"
  44
  45 static ssize_t show_parent(struct device *d, struct device_attribute *attr,
  46                            char *buf)
  47 {
  48         struct net_device *dev = to_net_dev(d);
  49         struct ipoib_dev_priv *priv = netdev_priv(dev);
  50
  51         return sprintf(buf, "%s\n", priv->parent->name);
  52 }
  53 static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
  54
  55 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
  56 {
  57         struct ipoib_dev_priv *ppriv, *priv;
  58         char intf_name[IFNAMSIZ];
  59         int result;
  60
  61         if (!capable(CAP_NET_ADMIN))
  62                 return -EPERM;
  63
  64         ppriv = netdev_priv(pdev);
  65
  66         mutex_lock(&ppriv->vlan_mutex);
  67
  68         /*
  69          * First ensure this isn't a duplicate. We check the parent device and
  70          * then all of the child interfaces to make sure the Pkey doesn't match.
  71          */
  72         if (ppriv->pkey == pkey) {
  73                 result = -ENOTUNIQ;
  74                 goto err;
  75         }
  76
  77         list_for_each_entry(priv, &ppriv->child_intfs, list) {
  78                 if (priv->pkey == pkey) {
  79                         result = -ENOTUNIQ;
  80                         goto err;
  81                 }
  82         }
  83
  84         snprintf(intf_name, sizeof intf_name, "%s.%04x",
  85                  ppriv->dev->name, pkey);
  86         priv = ipoib_intf_alloc(intf_name);
  87         if (!priv) {
  88                 result = -ENOMEM;
  89                 goto err;
  90         }
  91
  92         set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
  93
  94         priv->pkey = pkey;
  95
  96         memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
  97         priv->dev->broadcast[8] = pkey >> 8;
  98         priv->dev->broadcast[9] = pkey & 0xff;
  99
 100         result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
 101         if (result < 0) {
 102                 ipoib_warn(ppriv, "failed to initialize subinterface: "
 103                            "device %s, port %d",
 104                            ppriv->ca->name, ppriv->port);
 105                 goto device_init_failed;
 106         }
 107
 108         result = register_netdev(priv->dev);
 109         if (result) {
 110                 ipoib_warn(priv, "failed to initialize; error %i", result);
 111                 goto register_failed;
 112         }
 113
 114         priv->parent = ppriv->dev;
 115
 116         ipoib_create_debug_files(priv->dev);
 117
 118         if (ipoib_cm_add_mode_attr(priv->dev))
 119                 goto sysfs_failed;
 120         if (ipoib_add_pkey_attr(priv->dev))
 121                 goto sysfs_failed;
 122
 123         if (device_create_file(&priv->dev->dev, &dev_attr_parent))
 124                 goto sysfs_failed;
 125
 126         list_add_tail(&priv->list, &ppriv->child_intfs);
 127
 128         mutex_unlock(&ppriv->vlan_mutex);
 129
 130         return 0;
 131
 132 sysfs_failed:
 133         ipoib_delete_debug_files(priv->dev);
 134         unregister_netdev(priv->dev);
 135
 136 register_failed:
 137         ipoib_dev_cleanup(priv->dev);
 138
 139 device_init_failed:
 140         free_netdev(priv->dev);
 141
 142 err:
 143         mutex_unlock(&ppriv->vlan_mutex);
 144         return result;
 145 }
 146
 147 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
 148 {
 149         struct ipoib_dev_priv *ppriv, *priv, *tpriv;
 150         int ret = -ENOENT;
 151
 152         if (!capable(CAP_NET_ADMIN))
 153                 return -EPERM;
 154
 155         ppriv = netdev_priv(pdev);
 156
 157         mutex_lock(&ppriv->vlan_mutex);
 158         list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
 159                 if (priv->pkey == pkey) {
 160                         unregister_netdev(priv->dev);
 161                         ipoib_dev_cleanup(priv->dev);
 162                         list_del(&priv->list);
 163                         free_netdev(priv->dev);
 164
 165                         ret = 0;
 166                         break;
 167                 }
 168         }
 169         mutex_unlock(&ppriv->vlan_mutex);
 170
 171         return ret;
 172 }