FreeBSD/Linux Kernel Cross Reference
sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_vlan.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * Copyright (c) 2004 Topspin Communications.  All rights reserved.
      *
      * This software is available to you under a choice of one of two
      * licenses.  You may choose to be licensed under the terms of the GNU
      * General Public License (GPL) Version 2, available from the file
      * COPYING in the main directory of this source tree, or the
     * OpenIB.org BSD license below:
     *
     *     Redistribution and use in source and binary forms, with or
     *     without modification, are permitted provided that the following
     *     conditions are met:
     *
     *      - Redistributions of source code must retain the above
     *        copyright notice, this list of conditions and the following
     *        disclaimer.
     *
     *      - Redistributions in binary form must reproduce the above
     *        copyright notice, this list of conditions and the following
     *        disclaimer in the documentation and/or other materials
     *        provided with the distribution.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     * SOFTWARE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <linux/module.h>
    
    #include <linux/init.h>
    #include <linux/slab.h>
    #include <linux/seq_file.h>
    
    #include <asm/uaccess.h>
    
    #include "ipoib.h"
    
    static ssize_t show_parent(struct device *d, struct device_attribute *attr,
                               char *buf)
    {
            struct ifnet *dev = to_net_dev(d);
            struct ipoib_dev_priv *priv = dev->if_softc;
    
            return sprintf(buf, "%s\n", priv->parent->name);
    }
    static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
    
    int ipoib_vlan_add(struct ifnet *pdev, unsigned short pkey)
    {
            struct ipoib_dev_priv *ppriv, *priv;
            char intf_name[IFNAMSIZ];
            int result;
    
            if (!capable(CAP_NET_ADMIN))
                    return -EPERM;
    
            ppriv = pdev->if_softc;
    
            rtnl_lock();
            mutex_lock(&ppriv->vlan_mutex);
    
            /*
             * First ensure this isn't a duplicate. We check the parent device and
             * then all of the child interfaces to make sure the Pkey doesn't match.
             */
            if (ppriv->pkey == pkey) {
                    result = -ENOTUNIQ;
                    priv = NULL;
                    goto err;
            }
    
            list_for_each_entry(priv, &ppriv->child_intfs, list) {
                    if (priv->pkey == pkey) {
                            result = -ENOTUNIQ;
                            priv = NULL;
                            goto err;
                    }
            }
    
            snprintf(intf_name, sizeof intf_name, "%s.%04x",
                     ppriv->dev->name, pkey);
            priv = ipoib_intf_alloc(intf_name);
            if (!priv) {
                    result = -ENOMEM;
                    goto err;
            }
    
            priv->max_ib_mtu = ppriv->max_ib_mtu;
            /* MTU will be reset when mcast join happens */
           priv->dev->mtu   = IPOIB_UD_MTU(priv->max_ib_mtu);
           priv->mcast_mtu  = priv->admin_mtu = priv->dev->mtu;
           set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
   
           result = ipoib_set_dev_features(priv, ppriv->ca);
           if (result)
                   goto err;
   
           priv->pkey = pkey;
   
           memcpy(IF_LLADDR(priv->dev), ppriv->dev->dev_addr, INFINIBAND_ALEN);
           priv->broadcastaddr[8] = pkey >> 8;
           priv->broadcastaddr[9] = pkey & 0xff;
   
           result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
           if (result < 0) {
                   ipoib_warn(ppriv, "failed to initialize subinterface: "
                              "device %s, port %d",
                              ppriv->ca->name, ppriv->port);
                   goto err;
           }
   
           result = register_netdevice(priv->dev);
           if (result) {
                   ipoib_warn(priv, "failed to initialize; error %i", result);
                   goto register_failed;
           }
   
           priv->parent = ppriv->dev;
   
           ipoib_create_debug_files(priv->dev);
   
           if (ipoib_cm_add_mode_attr(priv->dev))
                   goto sysfs_failed;
           if (ipoib_add_pkey_attr(priv->dev))
                   goto sysfs_failed;
           if (ipoib_add_umcast_attr(priv->dev))
                   goto sysfs_failed;
   
           if (device_create_file(&priv->dev->dev, &dev_attr_parent))
                   goto sysfs_failed;
   
           list_add_tail(&priv->list, &ppriv->child_intfs);
   
           mutex_unlock(&ppriv->vlan_mutex);
           rtnl_unlock();
   
           return 0;
   
   sysfs_failed:
           ipoib_delete_debug_files(priv->dev);
           unregister_netdevice(priv->dev);
   
   register_failed:
           ipoib_dev_cleanup(priv->dev);
   
   err:
           mutex_unlock(&ppriv->vlan_mutex);
           rtnl_unlock();
           if (priv)
                   free_netdev(priv->dev);
   
           return result;
   }
   
   int ipoib_vlan_delete(struct ifnet *pdev, unsigned short pkey)
   {
           struct ipoib_dev_priv *ppriv, *priv, *tpriv;
           struct ifnet *dev = NULL;
   
           if (!capable(CAP_NET_ADMIN))
                   return -EPERM;
   
           ppriv = pdev->if_softc;
   
           rtnl_lock();
           mutex_lock(&ppriv->vlan_mutex);
           list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
                   if (priv->pkey == pkey) {
                           unregister_netdevice(priv->dev);
                           ipoib_dev_cleanup(priv->dev);
                           list_del(&priv->list);
                           dev = priv->dev;
                           break;
                   }
           }
           mutex_unlock(&ppriv->vlan_mutex);
           rtnl_unlock();
   
           if (dev) {
                   free_netdev(dev);
                   return 0;
           }
   
           return -ENODEV;
   }

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