/* * 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 #include #include #include #include #include "ipoib.h" static ssize_t show_parent(struct device *d, struct device_attribute *attr, char *buf) { struct net_device *dev = to_net_dev(d); struct ipoib_dev_priv *priv = ipoib_priv(dev); return sprintf(buf, "%s\n", priv->parent->name); } static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL); int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv, u16 pkey, int type) { int result; 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; priv->parent = ppriv->dev; set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); ipoib_set_dev_features(priv, ppriv->ca); priv->pkey = pkey; memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN); memcpy(&priv->local_gid, &ppriv->local_gid, sizeof(priv->local_gid)); set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); priv->dev->broadcast[8] = pkey >> 8; priv->dev->broadcast[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; } /* RTNL childs don't need proprietary sysfs entries */ if (type == IPOIB_LEGACY_CHILD) { 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; } priv->child_type = type; list_add_tail(&priv->list, &ppriv->child_intfs); return 0; sysfs_failed: result = -ENOMEM; unregister_netdevice(priv->dev); register_failed: ipoib_dev_cleanup(priv->dev); err: return result; } int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey) { struct ipoib_dev_priv *ppriv, *priv; char intf_name[IFNAMSIZ]; struct ipoib_dev_priv *tpriv; int result; if (!capable(CAP_NET_ADMIN)) return -EPERM; ppriv = ipoib_priv(pdev); if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags)) return -EPERM; snprintf(intf_name, sizeof intf_name, "%s.%04x", ppriv->dev->name, pkey); if (!mutex_trylock(&ppriv->sysfs_mutex)) return restart_syscall(); if (!rtnl_trylock()) { mutex_unlock(&ppriv->sysfs_mutex); return restart_syscall(); } if (!down_write_trylock(&ppriv->vlan_rwsem)) { rtnl_unlock(); mutex_unlock(&ppriv->sysfs_mutex); return restart_syscall(); } priv = ipoib_intf_alloc(ppriv->ca, ppriv->port, intf_name); if (!priv) { result = -ENOMEM; goto out; } /* * First ensure this isn't a duplicate. We check the parent device and * then all of the legacy child interfaces to make sure the Pkey * doesn't match. */ if (ppriv->pkey == pkey) { result = -ENOTUNIQ; goto out; } list_for_each_entry(tpriv, &ppriv->child_intfs, list) { if (tpriv->pkey == pkey && tpriv->child_type == IPOIB_LEGACY_CHILD) { result = -ENOTUNIQ; goto out; } } result = __ipoib_vlan_add(ppriv, priv, pkey, IPOIB_LEGACY_CHILD); out: up_write(&ppriv->vlan_rwsem); rtnl_unlock(); mutex_unlock(&ppriv->sysfs_mutex); if (result && priv) { struct rdma_netdev *rn; rn = netdev_priv(priv->dev); rn->free_rdma_netdev(priv->dev); kfree(priv); } return result; } int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey) { struct ipoib_dev_priv *ppriv, *priv, *tpriv; struct net_device *dev = NULL; if (!capable(CAP_NET_ADMIN)) return -EPERM; ppriv = ipoib_priv(pdev); if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags)) return -EPERM; if (!mutex_trylock(&ppriv->sysfs_mutex)) return restart_syscall(); if (!rtnl_trylock()) { mutex_unlock(&ppriv->sysfs_mutex); return restart_syscall(); } if (!down_write_trylock(&ppriv->vlan_rwsem)) { rtnl_unlock(); mutex_unlock(&ppriv->sysfs_mutex); return restart_syscall(); } list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) { if (priv->pkey == pkey && priv->child_type == IPOIB_LEGACY_CHILD) { list_del(&priv->list); dev = priv->dev; break; } } up_write(&ppriv->vlan_rwsem); if (dev) { ipoib_dbg(ppriv, "delete child vlan %s\n", dev->name); unregister_netdevice(dev); } rtnl_unlock(); mutex_unlock(&ppriv->sysfs_mutex); if (dev) { struct rdma_netdev *rn; rn = netdev_priv(dev); rn->free_rdma_netdev(priv->dev); kfree(priv); return 0; } return -ENODEV; }