2679 строки
66 KiB
C
2679 строки
66 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2004 Voltaire, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "ipoib.h"
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/vmalloc.h>
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#include <linux/if_arp.h> /* For ARPHRD_xxx */
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#include <linux/ip.h>
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#include <linux/in.h>
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#include <linux/jhash.h>
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#include <net/arp.h>
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#include <net/addrconf.h>
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#include <linux/inetdevice.h>
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#include <rdma/ib_cache.h>
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MODULE_AUTHOR("Roland Dreier");
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MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
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MODULE_LICENSE("Dual BSD/GPL");
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int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE;
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int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE;
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module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
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MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
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module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
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MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
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#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
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int ipoib_debug_level;
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module_param_named(debug_level, ipoib_debug_level, int, 0644);
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MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
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#endif
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struct ipoib_path_iter {
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struct net_device *dev;
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struct ipoib_path path;
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};
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static const u8 ipv4_bcast_addr[] = {
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0x00, 0xff, 0xff, 0xff,
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0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
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};
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struct workqueue_struct *ipoib_workqueue;
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struct ib_sa_client ipoib_sa_client;
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static int ipoib_add_one(struct ib_device *device);
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static void ipoib_remove_one(struct ib_device *device, void *client_data);
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static void ipoib_neigh_reclaim(struct rcu_head *rp);
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static struct net_device *ipoib_get_net_dev_by_params(
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struct ib_device *dev, u8 port, u16 pkey,
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const union ib_gid *gid, const struct sockaddr *addr,
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void *client_data);
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static int ipoib_set_mac(struct net_device *dev, void *addr);
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static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr,
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int cmd);
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static struct ib_client ipoib_client = {
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.name = "ipoib",
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.add = ipoib_add_one,
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.remove = ipoib_remove_one,
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.get_net_dev_by_params = ipoib_get_net_dev_by_params,
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};
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#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
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static int ipoib_netdev_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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struct netdev_notifier_info *ni = ptr;
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struct net_device *dev = ni->dev;
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if (dev->netdev_ops->ndo_open != ipoib_open)
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return NOTIFY_DONE;
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switch (event) {
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case NETDEV_REGISTER:
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ipoib_create_debug_files(dev);
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break;
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case NETDEV_CHANGENAME:
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ipoib_delete_debug_files(dev);
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ipoib_create_debug_files(dev);
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break;
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case NETDEV_UNREGISTER:
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ipoib_delete_debug_files(dev);
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break;
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}
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return NOTIFY_DONE;
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}
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#endif
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int ipoib_open(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = ipoib_priv(dev);
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ipoib_dbg(priv, "bringing up interface\n");
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netif_carrier_off(dev);
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set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
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priv->sm_fullmember_sendonly_support = false;
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if (ipoib_ib_dev_open(dev)) {
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if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
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return 0;
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goto err_disable;
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}
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ipoib_ib_dev_up(dev);
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if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
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struct ipoib_dev_priv *cpriv;
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/* Bring up any child interfaces too */
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down_read(&priv->vlan_rwsem);
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list_for_each_entry(cpriv, &priv->child_intfs, list) {
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int flags;
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flags = cpriv->dev->flags;
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if (flags & IFF_UP)
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continue;
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dev_change_flags(cpriv->dev, flags | IFF_UP, NULL);
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}
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up_read(&priv->vlan_rwsem);
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}
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netif_start_queue(dev);
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return 0;
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err_disable:
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clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
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return -EINVAL;
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}
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static int ipoib_stop(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = ipoib_priv(dev);
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ipoib_dbg(priv, "stopping interface\n");
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clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
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netif_stop_queue(dev);
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ipoib_ib_dev_down(dev);
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ipoib_ib_dev_stop(dev);
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if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
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struct ipoib_dev_priv *cpriv;
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/* Bring down any child interfaces too */
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down_read(&priv->vlan_rwsem);
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list_for_each_entry(cpriv, &priv->child_intfs, list) {
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int flags;
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flags = cpriv->dev->flags;
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if (!(flags & IFF_UP))
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continue;
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dev_change_flags(cpriv->dev, flags & ~IFF_UP, NULL);
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}
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up_read(&priv->vlan_rwsem);
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}
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return 0;
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}
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static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features)
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{
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struct ipoib_dev_priv *priv = ipoib_priv(dev);
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if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags))
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features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO);
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return features;
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}
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static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct ipoib_dev_priv *priv = ipoib_priv(dev);
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int ret = 0;
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/* dev->mtu > 2K ==> connected mode */
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if (ipoib_cm_admin_enabled(dev)) {
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if (new_mtu > ipoib_cm_max_mtu(dev))
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return -EINVAL;
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if (new_mtu > priv->mcast_mtu)
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ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
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priv->mcast_mtu);
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dev->mtu = new_mtu;
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return 0;
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}
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if (new_mtu < (ETH_MIN_MTU + IPOIB_ENCAP_LEN) ||
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new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
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return -EINVAL;
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priv->admin_mtu = new_mtu;
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if (priv->mcast_mtu < priv->admin_mtu)
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ipoib_dbg(priv, "MTU must be smaller than the underlying "
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"link layer MTU - 4 (%u)\n", priv->mcast_mtu);
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new_mtu = min(priv->mcast_mtu, priv->admin_mtu);
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if (priv->rn_ops->ndo_change_mtu) {
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bool carrier_status = netif_carrier_ok(dev);
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netif_carrier_off(dev);
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/* notify lower level on the real mtu */
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ret = priv->rn_ops->ndo_change_mtu(dev, new_mtu);
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if (carrier_status)
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netif_carrier_on(dev);
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} else {
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dev->mtu = new_mtu;
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}
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return ret;
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}
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static void ipoib_get_stats(struct net_device *dev,
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struct rtnl_link_stats64 *stats)
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{
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struct ipoib_dev_priv *priv = ipoib_priv(dev);
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if (priv->rn_ops->ndo_get_stats64)
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priv->rn_ops->ndo_get_stats64(dev, stats);
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else
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netdev_stats_to_stats64(stats, &dev->stats);
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}
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/* Called with an RCU read lock taken */
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static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr,
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struct net_device *dev)
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{
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struct net *net = dev_net(dev);
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struct in_device *in_dev;
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struct sockaddr_in *addr_in = (struct sockaddr_in *)addr;
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struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr;
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__be32 ret_addr;
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switch (addr->sa_family) {
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case AF_INET:
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in_dev = in_dev_get(dev);
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if (!in_dev)
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return false;
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ret_addr = inet_confirm_addr(net, in_dev, 0,
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addr_in->sin_addr.s_addr,
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RT_SCOPE_HOST);
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in_dev_put(in_dev);
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if (ret_addr)
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return true;
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break;
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case AF_INET6:
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if (IS_ENABLED(CONFIG_IPV6) &&
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ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1))
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return true;
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break;
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}
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return false;
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}
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/**
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* Find the master net_device on top of the given net_device.
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* @dev: base IPoIB net_device
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*
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* Returns the master net_device with a reference held, or the same net_device
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* if no master exists.
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*/
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static struct net_device *ipoib_get_master_net_dev(struct net_device *dev)
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{
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struct net_device *master;
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rcu_read_lock();
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master = netdev_master_upper_dev_get_rcu(dev);
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if (master)
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dev_hold(master);
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rcu_read_unlock();
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if (master)
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return master;
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dev_hold(dev);
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return dev;
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}
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struct ipoib_walk_data {
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const struct sockaddr *addr;
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struct net_device *result;
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};
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static int ipoib_upper_walk(struct net_device *upper,
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struct netdev_nested_priv *priv)
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{
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struct ipoib_walk_data *data = (struct ipoib_walk_data *)priv->data;
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int ret = 0;
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if (ipoib_is_dev_match_addr_rcu(data->addr, upper)) {
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dev_hold(upper);
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data->result = upper;
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ret = 1;
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}
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return ret;
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}
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/**
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* Find a net_device matching the given address, which is an upper device of
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* the given net_device.
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* @addr: IP address to look for.
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* @dev: base IPoIB net_device
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*
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* If found, returns the net_device with a reference held. Otherwise return
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* NULL.
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*/
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static struct net_device *ipoib_get_net_dev_match_addr(
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const struct sockaddr *addr, struct net_device *dev)
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{
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struct netdev_nested_priv priv;
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struct ipoib_walk_data data = {
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.addr = addr,
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};
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priv.data = (void *)&data;
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rcu_read_lock();
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if (ipoib_is_dev_match_addr_rcu(addr, dev)) {
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dev_hold(dev);
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data.result = dev;
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goto out;
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}
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netdev_walk_all_upper_dev_rcu(dev, ipoib_upper_walk, &priv);
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out:
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rcu_read_unlock();
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return data.result;
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}
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/* returns the number of IPoIB netdevs on top a given ipoib device matching a
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* pkey_index and address, if one exists.
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*
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* @found_net_dev: contains a matching net_device if the return value >= 1,
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* with a reference held. */
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static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv,
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const union ib_gid *gid,
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u16 pkey_index,
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const struct sockaddr *addr,
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int nesting,
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struct net_device **found_net_dev)
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{
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struct ipoib_dev_priv *child_priv;
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struct net_device *net_dev = NULL;
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int matches = 0;
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if (priv->pkey_index == pkey_index &&
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(!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) {
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if (!addr) {
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net_dev = ipoib_get_master_net_dev(priv->dev);
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} else {
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/* Verify the net_device matches the IP address, as
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* IPoIB child devices currently share a GID. */
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net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev);
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}
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if (net_dev) {
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if (!*found_net_dev)
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*found_net_dev = net_dev;
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else
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dev_put(net_dev);
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++matches;
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}
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}
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/* Check child interfaces */
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down_read_nested(&priv->vlan_rwsem, nesting);
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list_for_each_entry(child_priv, &priv->child_intfs, list) {
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matches += ipoib_match_gid_pkey_addr(child_priv, gid,
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pkey_index, addr,
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nesting + 1,
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found_net_dev);
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if (matches > 1)
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break;
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}
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up_read(&priv->vlan_rwsem);
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return matches;
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}
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/* Returns the number of matching net_devs found (between 0 and 2). Also
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* return the matching net_device in the @net_dev parameter, holding a
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* reference to the net_device, if the number of matches >= 1 */
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static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port,
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u16 pkey_index,
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const union ib_gid *gid,
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const struct sockaddr *addr,
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struct net_device **net_dev)
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{
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struct ipoib_dev_priv *priv;
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int matches = 0;
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*net_dev = NULL;
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list_for_each_entry(priv, dev_list, list) {
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if (priv->port != port)
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continue;
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matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index,
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addr, 0, net_dev);
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if (matches > 1)
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break;
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}
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return matches;
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}
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static struct net_device *ipoib_get_net_dev_by_params(
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struct ib_device *dev, u8 port, u16 pkey,
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const union ib_gid *gid, const struct sockaddr *addr,
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void *client_data)
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{
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struct net_device *net_dev;
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struct list_head *dev_list = client_data;
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u16 pkey_index;
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int matches;
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int ret;
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if (!rdma_protocol_ib(dev, port))
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return NULL;
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ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index);
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if (ret)
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return NULL;
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/* See if we can find a unique device matching the L2 parameters */
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matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
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gid, NULL, &net_dev);
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switch (matches) {
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case 0:
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return NULL;
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case 1:
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return net_dev;
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}
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dev_put(net_dev);
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/* Couldn't find a unique device with L2 parameters only. Use L3
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* address to uniquely match the net device */
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matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
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gid, addr, &net_dev);
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switch (matches) {
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case 0:
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return NULL;
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default:
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dev_warn_ratelimited(&dev->dev,
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"duplicate IP address detected\n");
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fallthrough;
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case 1:
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return net_dev;
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}
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}
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int ipoib_set_mode(struct net_device *dev, const char *buf)
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{
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struct ipoib_dev_priv *priv = ipoib_priv(dev);
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if ((test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
|
|
!strcmp(buf, "connected\n")) ||
|
|
(!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
|
|
!strcmp(buf, "datagram\n"))) {
|
|
return 0;
|
|
}
|
|
|
|
/* flush paths if we switch modes so that connections are restarted */
|
|
if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) {
|
|
set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
|
|
ipoib_warn(priv, "enabling connected mode "
|
|
"will cause multicast packet drops\n");
|
|
netdev_update_features(dev);
|
|
dev_set_mtu(dev, ipoib_cm_max_mtu(dev));
|
|
netif_set_real_num_tx_queues(dev, 1);
|
|
rtnl_unlock();
|
|
priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
|
|
|
|
ipoib_flush_paths(dev);
|
|
return (!rtnl_trylock()) ? -EBUSY : 0;
|
|
}
|
|
|
|
if (!strcmp(buf, "datagram\n")) {
|
|
clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
|
|
netdev_update_features(dev);
|
|
dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
|
|
netif_set_real_num_tx_queues(dev, dev->num_tx_queues);
|
|
rtnl_unlock();
|
|
ipoib_flush_paths(dev);
|
|
return (!rtnl_trylock()) ? -EBUSY : 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
struct ipoib_path *__path_find(struct net_device *dev, void *gid)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct rb_node *n = priv->path_tree.rb_node;
|
|
struct ipoib_path *path;
|
|
int ret;
|
|
|
|
while (n) {
|
|
path = rb_entry(n, struct ipoib_path, rb_node);
|
|
|
|
ret = memcmp(gid, path->pathrec.dgid.raw,
|
|
sizeof (union ib_gid));
|
|
|
|
if (ret < 0)
|
|
n = n->rb_left;
|
|
else if (ret > 0)
|
|
n = n->rb_right;
|
|
else
|
|
return path;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int __path_add(struct net_device *dev, struct ipoib_path *path)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct rb_node **n = &priv->path_tree.rb_node;
|
|
struct rb_node *pn = NULL;
|
|
struct ipoib_path *tpath;
|
|
int ret;
|
|
|
|
while (*n) {
|
|
pn = *n;
|
|
tpath = rb_entry(pn, struct ipoib_path, rb_node);
|
|
|
|
ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
|
|
sizeof (union ib_gid));
|
|
if (ret < 0)
|
|
n = &pn->rb_left;
|
|
else if (ret > 0)
|
|
n = &pn->rb_right;
|
|
else
|
|
return -EEXIST;
|
|
}
|
|
|
|
rb_link_node(&path->rb_node, pn, n);
|
|
rb_insert_color(&path->rb_node, &priv->path_tree);
|
|
|
|
list_add_tail(&path->list, &priv->path_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void path_free(struct net_device *dev, struct ipoib_path *path)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
while ((skb = __skb_dequeue(&path->queue)))
|
|
dev_kfree_skb_irq(skb);
|
|
|
|
ipoib_dbg(ipoib_priv(dev), "%s\n", __func__);
|
|
|
|
/* remove all neigh connected to this path */
|
|
ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
|
|
|
|
if (path->ah)
|
|
ipoib_put_ah(path->ah);
|
|
|
|
kfree(path);
|
|
}
|
|
|
|
#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
|
|
|
|
struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
|
|
{
|
|
struct ipoib_path_iter *iter;
|
|
|
|
iter = kmalloc(sizeof(*iter), GFP_KERNEL);
|
|
if (!iter)
|
|
return NULL;
|
|
|
|
iter->dev = dev;
|
|
memset(iter->path.pathrec.dgid.raw, 0, 16);
|
|
|
|
if (ipoib_path_iter_next(iter)) {
|
|
kfree(iter);
|
|
return NULL;
|
|
}
|
|
|
|
return iter;
|
|
}
|
|
|
|
int ipoib_path_iter_next(struct ipoib_path_iter *iter)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(iter->dev);
|
|
struct rb_node *n;
|
|
struct ipoib_path *path;
|
|
int ret = 1;
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
|
|
n = rb_first(&priv->path_tree);
|
|
|
|
while (n) {
|
|
path = rb_entry(n, struct ipoib_path, rb_node);
|
|
|
|
if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
|
|
sizeof (union ib_gid)) < 0) {
|
|
iter->path = *path;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
n = rb_next(n);
|
|
}
|
|
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void ipoib_path_iter_read(struct ipoib_path_iter *iter,
|
|
struct ipoib_path *path)
|
|
{
|
|
*path = iter->path;
|
|
}
|
|
|
|
#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
|
|
|
|
void ipoib_mark_paths_invalid(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_path *path, *tp;
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
|
|
list_for_each_entry_safe(path, tp, &priv->path_list, list) {
|
|
ipoib_dbg(priv, "mark path LID 0x%08x GID %pI6 invalid\n",
|
|
be32_to_cpu(sa_path_get_dlid(&path->pathrec)),
|
|
path->pathrec.dgid.raw);
|
|
if (path->ah)
|
|
path->ah->valid = 0;
|
|
}
|
|
|
|
spin_unlock_irq(&priv->lock);
|
|
}
|
|
|
|
static void push_pseudo_header(struct sk_buff *skb, const char *daddr)
|
|
{
|
|
struct ipoib_pseudo_header *phdr;
|
|
|
|
phdr = skb_push(skb, sizeof(*phdr));
|
|
memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
|
|
}
|
|
|
|
void ipoib_flush_paths(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_path *path, *tp;
|
|
LIST_HEAD(remove_list);
|
|
unsigned long flags;
|
|
|
|
netif_tx_lock_bh(dev);
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
list_splice_init(&priv->path_list, &remove_list);
|
|
|
|
list_for_each_entry(path, &remove_list, list)
|
|
rb_erase(&path->rb_node, &priv->path_tree);
|
|
|
|
list_for_each_entry_safe(path, tp, &remove_list, list) {
|
|
if (path->query)
|
|
ib_sa_cancel_query(path->query_id, path->query);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
netif_tx_unlock_bh(dev);
|
|
wait_for_completion(&path->done);
|
|
path_free(dev, path);
|
|
netif_tx_lock_bh(dev);
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
netif_tx_unlock_bh(dev);
|
|
}
|
|
|
|
static void path_rec_completion(int status,
|
|
struct sa_path_rec *pathrec,
|
|
void *path_ptr)
|
|
{
|
|
struct ipoib_path *path = path_ptr;
|
|
struct net_device *dev = path->dev;
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_ah *ah = NULL;
|
|
struct ipoib_ah *old_ah = NULL;
|
|
struct ipoib_neigh *neigh, *tn;
|
|
struct sk_buff_head skqueue;
|
|
struct sk_buff *skb;
|
|
unsigned long flags;
|
|
|
|
if (!status)
|
|
ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n",
|
|
be32_to_cpu(sa_path_get_dlid(pathrec)),
|
|
pathrec->dgid.raw);
|
|
else
|
|
ipoib_dbg(priv, "PathRec status %d for GID %pI6\n",
|
|
status, path->pathrec.dgid.raw);
|
|
|
|
skb_queue_head_init(&skqueue);
|
|
|
|
if (!status) {
|
|
struct rdma_ah_attr av;
|
|
|
|
if (!ib_init_ah_attr_from_path(priv->ca, priv->port,
|
|
pathrec, &av, NULL)) {
|
|
ah = ipoib_create_ah(dev, priv->pd, &av);
|
|
rdma_destroy_ah_attr(&av);
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
if (!IS_ERR_OR_NULL(ah)) {
|
|
/*
|
|
* pathrec.dgid is used as the database key from the LLADDR,
|
|
* it must remain unchanged even if the SA returns a different
|
|
* GID to use in the AH.
|
|
*/
|
|
if (memcmp(pathrec->dgid.raw, path->pathrec.dgid.raw,
|
|
sizeof(union ib_gid))) {
|
|
ipoib_dbg(
|
|
priv,
|
|
"%s got PathRec for gid %pI6 while asked for %pI6\n",
|
|
dev->name, pathrec->dgid.raw,
|
|
path->pathrec.dgid.raw);
|
|
memcpy(pathrec->dgid.raw, path->pathrec.dgid.raw,
|
|
sizeof(union ib_gid));
|
|
}
|
|
|
|
path->pathrec = *pathrec;
|
|
|
|
old_ah = path->ah;
|
|
path->ah = ah;
|
|
|
|
ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
|
|
ah, be32_to_cpu(sa_path_get_dlid(pathrec)),
|
|
pathrec->sl);
|
|
|
|
while ((skb = __skb_dequeue(&path->queue)))
|
|
__skb_queue_tail(&skqueue, skb);
|
|
|
|
list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
|
|
if (neigh->ah) {
|
|
WARN_ON(neigh->ah != old_ah);
|
|
/*
|
|
* Dropping the ah reference inside
|
|
* priv->lock is safe here, because we
|
|
* will hold one more reference from
|
|
* the original value of path->ah (ie
|
|
* old_ah).
|
|
*/
|
|
ipoib_put_ah(neigh->ah);
|
|
}
|
|
kref_get(&path->ah->ref);
|
|
neigh->ah = path->ah;
|
|
|
|
if (ipoib_cm_enabled(dev, neigh->daddr)) {
|
|
if (!ipoib_cm_get(neigh))
|
|
ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
|
|
path,
|
|
neigh));
|
|
if (!ipoib_cm_get(neigh)) {
|
|
ipoib_neigh_free(neigh);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
while ((skb = __skb_dequeue(&neigh->queue)))
|
|
__skb_queue_tail(&skqueue, skb);
|
|
}
|
|
path->ah->valid = 1;
|
|
}
|
|
|
|
path->query = NULL;
|
|
complete(&path->done);
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
if (IS_ERR_OR_NULL(ah))
|
|
ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
|
|
|
|
if (old_ah)
|
|
ipoib_put_ah(old_ah);
|
|
|
|
while ((skb = __skb_dequeue(&skqueue))) {
|
|
int ret;
|
|
skb->dev = dev;
|
|
ret = dev_queue_xmit(skb);
|
|
if (ret)
|
|
ipoib_warn(priv, "%s: dev_queue_xmit failed to re-queue packet, ret:%d\n",
|
|
__func__, ret);
|
|
}
|
|
}
|
|
|
|
static void init_path_rec(struct ipoib_dev_priv *priv, struct ipoib_path *path,
|
|
void *gid)
|
|
{
|
|
path->dev = priv->dev;
|
|
|
|
if (rdma_cap_opa_ah(priv->ca, priv->port))
|
|
path->pathrec.rec_type = SA_PATH_REC_TYPE_OPA;
|
|
else
|
|
path->pathrec.rec_type = SA_PATH_REC_TYPE_IB;
|
|
|
|
memcpy(path->pathrec.dgid.raw, gid, sizeof(union ib_gid));
|
|
path->pathrec.sgid = priv->local_gid;
|
|
path->pathrec.pkey = cpu_to_be16(priv->pkey);
|
|
path->pathrec.numb_path = 1;
|
|
path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
|
|
}
|
|
|
|
static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_path *path;
|
|
|
|
if (!priv->broadcast)
|
|
return NULL;
|
|
|
|
path = kzalloc(sizeof(*path), GFP_ATOMIC);
|
|
if (!path)
|
|
return NULL;
|
|
|
|
skb_queue_head_init(&path->queue);
|
|
|
|
INIT_LIST_HEAD(&path->neigh_list);
|
|
|
|
init_path_rec(priv, path, gid);
|
|
|
|
return path;
|
|
}
|
|
|
|
static int path_rec_start(struct net_device *dev,
|
|
struct ipoib_path *path)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
ipoib_dbg(priv, "Start path record lookup for %pI6\n",
|
|
path->pathrec.dgid.raw);
|
|
|
|
init_completion(&path->done);
|
|
|
|
path->query_id =
|
|
ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
|
|
&path->pathrec,
|
|
IB_SA_PATH_REC_DGID |
|
|
IB_SA_PATH_REC_SGID |
|
|
IB_SA_PATH_REC_NUMB_PATH |
|
|
IB_SA_PATH_REC_TRAFFIC_CLASS |
|
|
IB_SA_PATH_REC_PKEY,
|
|
1000, GFP_ATOMIC,
|
|
path_rec_completion,
|
|
path, &path->query);
|
|
if (path->query_id < 0) {
|
|
ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
|
|
path->query = NULL;
|
|
complete(&path->done);
|
|
return path->query_id;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void neigh_refresh_path(struct ipoib_neigh *neigh, u8 *daddr,
|
|
struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_path *path;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
path = __path_find(dev, daddr + 4);
|
|
if (!path)
|
|
goto out;
|
|
if (!path->query)
|
|
path_rec_start(dev, path);
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static struct ipoib_neigh *neigh_add_path(struct sk_buff *skb, u8 *daddr,
|
|
struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct rdma_netdev *rn = netdev_priv(dev);
|
|
struct ipoib_path *path;
|
|
struct ipoib_neigh *neigh;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
neigh = ipoib_neigh_alloc(daddr, dev);
|
|
if (!neigh) {
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
return NULL;
|
|
}
|
|
|
|
/* To avoid race condition, make sure that the
|
|
* neigh will be added only once.
|
|
*/
|
|
if (unlikely(!list_empty(&neigh->list))) {
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return neigh;
|
|
}
|
|
|
|
path = __path_find(dev, daddr + 4);
|
|
if (!path) {
|
|
path = path_rec_create(dev, daddr + 4);
|
|
if (!path)
|
|
goto err_path;
|
|
|
|
__path_add(dev, path);
|
|
}
|
|
|
|
list_add_tail(&neigh->list, &path->neigh_list);
|
|
|
|
if (path->ah && path->ah->valid) {
|
|
kref_get(&path->ah->ref);
|
|
neigh->ah = path->ah;
|
|
|
|
if (ipoib_cm_enabled(dev, neigh->daddr)) {
|
|
if (!ipoib_cm_get(neigh))
|
|
ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
|
|
if (!ipoib_cm_get(neigh)) {
|
|
ipoib_neigh_free(neigh);
|
|
goto err_drop;
|
|
}
|
|
if (skb_queue_len(&neigh->queue) <
|
|
IPOIB_MAX_PATH_REC_QUEUE) {
|
|
push_pseudo_header(skb, neigh->daddr);
|
|
__skb_queue_tail(&neigh->queue, skb);
|
|
} else {
|
|
ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
|
|
skb_queue_len(&neigh->queue));
|
|
goto err_drop;
|
|
}
|
|
} else {
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
path->ah->last_send = rn->send(dev, skb, path->ah->ah,
|
|
IPOIB_QPN(daddr));
|
|
ipoib_neigh_put(neigh);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
neigh->ah = NULL;
|
|
|
|
if (!path->query && path_rec_start(dev, path))
|
|
goto err_path;
|
|
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
|
|
push_pseudo_header(skb, neigh->daddr);
|
|
__skb_queue_tail(&neigh->queue, skb);
|
|
} else {
|
|
goto err_drop;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ipoib_neigh_put(neigh);
|
|
return NULL;
|
|
|
|
err_path:
|
|
ipoib_neigh_free(neigh);
|
|
err_drop:
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ipoib_neigh_put(neigh);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
|
|
struct ipoib_pseudo_header *phdr)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct rdma_netdev *rn = netdev_priv(dev);
|
|
struct ipoib_path *path;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
/* no broadcast means that all paths are (going to be) not valid */
|
|
if (!priv->broadcast)
|
|
goto drop_and_unlock;
|
|
|
|
path = __path_find(dev, phdr->hwaddr + 4);
|
|
if (!path || !path->ah || !path->ah->valid) {
|
|
if (!path) {
|
|
path = path_rec_create(dev, phdr->hwaddr + 4);
|
|
if (!path)
|
|
goto drop_and_unlock;
|
|
__path_add(dev, path);
|
|
} else {
|
|
/*
|
|
* make sure there are no changes in the existing
|
|
* path record
|
|
*/
|
|
init_path_rec(priv, path, phdr->hwaddr + 4);
|
|
}
|
|
if (!path->query && path_rec_start(dev, path)) {
|
|
goto drop_and_unlock;
|
|
}
|
|
|
|
if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
|
|
push_pseudo_header(skb, phdr->hwaddr);
|
|
__skb_queue_tail(&path->queue, skb);
|
|
goto unlock;
|
|
} else {
|
|
goto drop_and_unlock;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ipoib_dbg(priv, "Send unicast ARP to %08x\n",
|
|
be32_to_cpu(sa_path_get_dlid(&path->pathrec)));
|
|
path->ah->last_send = rn->send(dev, skb, path->ah->ah,
|
|
IPOIB_QPN(phdr->hwaddr));
|
|
return;
|
|
|
|
drop_and_unlock:
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
unlock:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static netdev_tx_t ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct rdma_netdev *rn = netdev_priv(dev);
|
|
struct ipoib_neigh *neigh;
|
|
struct ipoib_pseudo_header *phdr;
|
|
struct ipoib_header *header;
|
|
unsigned long flags;
|
|
|
|
phdr = (struct ipoib_pseudo_header *) skb->data;
|
|
skb_pull(skb, sizeof(*phdr));
|
|
header = (struct ipoib_header *) skb->data;
|
|
|
|
if (unlikely(phdr->hwaddr[4] == 0xff)) {
|
|
/* multicast, arrange "if" according to probability */
|
|
if ((header->proto != htons(ETH_P_IP)) &&
|
|
(header->proto != htons(ETH_P_IPV6)) &&
|
|
(header->proto != htons(ETH_P_ARP)) &&
|
|
(header->proto != htons(ETH_P_RARP)) &&
|
|
(header->proto != htons(ETH_P_TIPC))) {
|
|
/* ethertype not supported by IPoIB */
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
/* Add in the P_Key for multicast*/
|
|
phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
|
|
phdr->hwaddr[9] = priv->pkey & 0xff;
|
|
|
|
neigh = ipoib_neigh_get(dev, phdr->hwaddr);
|
|
if (likely(neigh))
|
|
goto send_using_neigh;
|
|
ipoib_mcast_send(dev, phdr->hwaddr, skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* unicast, arrange "switch" according to probability */
|
|
switch (header->proto) {
|
|
case htons(ETH_P_IP):
|
|
case htons(ETH_P_IPV6):
|
|
case htons(ETH_P_TIPC):
|
|
neigh = ipoib_neigh_get(dev, phdr->hwaddr);
|
|
if (unlikely(!neigh)) {
|
|
neigh = neigh_add_path(skb, phdr->hwaddr, dev);
|
|
if (likely(!neigh))
|
|
return NETDEV_TX_OK;
|
|
}
|
|
break;
|
|
case htons(ETH_P_ARP):
|
|
case htons(ETH_P_RARP):
|
|
/* for unicast ARP and RARP should always perform path find */
|
|
unicast_arp_send(skb, dev, phdr);
|
|
return NETDEV_TX_OK;
|
|
default:
|
|
/* ethertype not supported by IPoIB */
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
send_using_neigh:
|
|
/* note we now hold a ref to neigh */
|
|
if (ipoib_cm_get(neigh)) {
|
|
if (ipoib_cm_up(neigh)) {
|
|
ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
|
|
goto unref;
|
|
}
|
|
} else if (neigh->ah && neigh->ah->valid) {
|
|
neigh->ah->last_send = rn->send(dev, skb, neigh->ah->ah,
|
|
IPOIB_QPN(phdr->hwaddr));
|
|
goto unref;
|
|
} else if (neigh->ah) {
|
|
neigh_refresh_path(neigh, phdr->hwaddr, dev);
|
|
}
|
|
|
|
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
|
|
push_pseudo_header(skb, phdr->hwaddr);
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
__skb_queue_tail(&neigh->queue, skb);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
} else {
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
unref:
|
|
ipoib_neigh_put(neigh);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static void ipoib_timeout(struct net_device *dev, unsigned int txqueue)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
|
|
jiffies_to_msecs(jiffies - dev_trans_start(dev)));
|
|
ipoib_warn(priv,
|
|
"queue stopped %d, tx_head %u, tx_tail %u, global_tx_head %u, global_tx_tail %u\n",
|
|
netif_queue_stopped(dev), priv->tx_head, priv->tx_tail,
|
|
priv->global_tx_head, priv->global_tx_tail);
|
|
|
|
/* XXX reset QP, etc. */
|
|
}
|
|
|
|
static int ipoib_hard_header(struct sk_buff *skb,
|
|
struct net_device *dev,
|
|
unsigned short type,
|
|
const void *daddr,
|
|
const void *saddr,
|
|
unsigned int len)
|
|
{
|
|
struct ipoib_header *header;
|
|
|
|
header = skb_push(skb, sizeof(*header));
|
|
|
|
header->proto = htons(type);
|
|
header->reserved = 0;
|
|
|
|
/*
|
|
* we don't rely on dst_entry structure, always stuff the
|
|
* destination address into skb hard header so we can figure out where
|
|
* to send the packet later.
|
|
*/
|
|
push_pseudo_header(skb, daddr);
|
|
|
|
return IPOIB_HARD_LEN;
|
|
}
|
|
|
|
static void ipoib_set_mcast_list(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
|
|
ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
|
|
return;
|
|
}
|
|
|
|
queue_work(priv->wq, &priv->restart_task);
|
|
}
|
|
|
|
static int ipoib_get_iflink(const struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
/* parent interface */
|
|
if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
|
|
return dev->ifindex;
|
|
|
|
/* child/vlan interface */
|
|
return priv->parent->ifindex;
|
|
}
|
|
|
|
static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr)
|
|
{
|
|
/*
|
|
* Use only the address parts that contributes to spreading
|
|
* The subnet prefix is not used as one can not connect to
|
|
* same remote port (GUID) using the same remote QPN via two
|
|
* different subnets.
|
|
*/
|
|
/* qpn octets[1:4) & port GUID octets[12:20) */
|
|
u32 *d32 = (u32 *) daddr;
|
|
u32 hv;
|
|
|
|
hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0);
|
|
return hv & htbl->mask;
|
|
}
|
|
|
|
struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_neigh_table *ntbl = &priv->ntbl;
|
|
struct ipoib_neigh_hash *htbl;
|
|
struct ipoib_neigh *neigh = NULL;
|
|
u32 hash_val;
|
|
|
|
rcu_read_lock_bh();
|
|
|
|
htbl = rcu_dereference_bh(ntbl->htbl);
|
|
|
|
if (!htbl)
|
|
goto out_unlock;
|
|
|
|
hash_val = ipoib_addr_hash(htbl, daddr);
|
|
for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]);
|
|
neigh != NULL;
|
|
neigh = rcu_dereference_bh(neigh->hnext)) {
|
|
if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
|
|
/* found, take one ref on behalf of the caller */
|
|
if (!atomic_inc_not_zero(&neigh->refcnt)) {
|
|
/* deleted */
|
|
neigh = NULL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (likely(skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE))
|
|
neigh->alive = jiffies;
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
out_unlock:
|
|
rcu_read_unlock_bh();
|
|
return neigh;
|
|
}
|
|
|
|
static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
|
|
{
|
|
struct ipoib_neigh_table *ntbl = &priv->ntbl;
|
|
struct ipoib_neigh_hash *htbl;
|
|
unsigned long neigh_obsolete;
|
|
unsigned long dt;
|
|
unsigned long flags;
|
|
int i;
|
|
LIST_HEAD(remove_list);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
htbl = rcu_dereference_protected(ntbl->htbl,
|
|
lockdep_is_held(&priv->lock));
|
|
|
|
if (!htbl)
|
|
goto out_unlock;
|
|
|
|
/* neigh is obsolete if it was idle for two GC periods */
|
|
dt = 2 * arp_tbl.gc_interval;
|
|
neigh_obsolete = jiffies - dt;
|
|
|
|
for (i = 0; i < htbl->size; i++) {
|
|
struct ipoib_neigh *neigh;
|
|
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
|
|
|
|
while ((neigh = rcu_dereference_protected(*np,
|
|
lockdep_is_held(&priv->lock))) != NULL) {
|
|
/* was the neigh idle for two GC periods */
|
|
if (time_after(neigh_obsolete, neigh->alive)) {
|
|
|
|
ipoib_check_and_add_mcast_sendonly(priv, neigh->daddr + 4, &remove_list);
|
|
|
|
rcu_assign_pointer(*np,
|
|
rcu_dereference_protected(neigh->hnext,
|
|
lockdep_is_held(&priv->lock)));
|
|
/* remove from path/mc list */
|
|
list_del_init(&neigh->list);
|
|
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
|
|
} else {
|
|
np = &neigh->hnext;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
out_unlock:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ipoib_mcast_remove_list(&remove_list);
|
|
}
|
|
|
|
static void ipoib_reap_neigh(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, neigh_reap_task.work);
|
|
|
|
__ipoib_reap_neigh(priv);
|
|
|
|
queue_delayed_work(priv->wq, &priv->neigh_reap_task,
|
|
arp_tbl.gc_interval);
|
|
}
|
|
|
|
|
|
static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr,
|
|
struct net_device *dev)
|
|
{
|
|
struct ipoib_neigh *neigh;
|
|
|
|
neigh = kzalloc(sizeof(*neigh), GFP_ATOMIC);
|
|
if (!neigh)
|
|
return NULL;
|
|
|
|
neigh->dev = dev;
|
|
memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr));
|
|
skb_queue_head_init(&neigh->queue);
|
|
INIT_LIST_HEAD(&neigh->list);
|
|
ipoib_cm_set(neigh, NULL);
|
|
/* one ref on behalf of the caller */
|
|
atomic_set(&neigh->refcnt, 1);
|
|
|
|
return neigh;
|
|
}
|
|
|
|
struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
|
|
struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_neigh_table *ntbl = &priv->ntbl;
|
|
struct ipoib_neigh_hash *htbl;
|
|
struct ipoib_neigh *neigh;
|
|
u32 hash_val;
|
|
|
|
htbl = rcu_dereference_protected(ntbl->htbl,
|
|
lockdep_is_held(&priv->lock));
|
|
if (!htbl) {
|
|
neigh = NULL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* need to add a new neigh, but maybe some other thread succeeded?
|
|
* recalc hash, maybe hash resize took place so we do a search
|
|
*/
|
|
hash_val = ipoib_addr_hash(htbl, daddr);
|
|
for (neigh = rcu_dereference_protected(htbl->buckets[hash_val],
|
|
lockdep_is_held(&priv->lock));
|
|
neigh != NULL;
|
|
neigh = rcu_dereference_protected(neigh->hnext,
|
|
lockdep_is_held(&priv->lock))) {
|
|
if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
|
|
/* found, take one ref on behalf of the caller */
|
|
if (!atomic_inc_not_zero(&neigh->refcnt)) {
|
|
/* deleted */
|
|
neigh = NULL;
|
|
break;
|
|
}
|
|
neigh->alive = jiffies;
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
neigh = ipoib_neigh_ctor(daddr, dev);
|
|
if (!neigh)
|
|
goto out_unlock;
|
|
|
|
/* one ref on behalf of the hash table */
|
|
atomic_inc(&neigh->refcnt);
|
|
neigh->alive = jiffies;
|
|
/* put in hash */
|
|
rcu_assign_pointer(neigh->hnext,
|
|
rcu_dereference_protected(htbl->buckets[hash_val],
|
|
lockdep_is_held(&priv->lock)));
|
|
rcu_assign_pointer(htbl->buckets[hash_val], neigh);
|
|
atomic_inc(&ntbl->entries);
|
|
|
|
out_unlock:
|
|
|
|
return neigh;
|
|
}
|
|
|
|
void ipoib_neigh_dtor(struct ipoib_neigh *neigh)
|
|
{
|
|
/* neigh reference count was dropprd to zero */
|
|
struct net_device *dev = neigh->dev;
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct sk_buff *skb;
|
|
if (neigh->ah)
|
|
ipoib_put_ah(neigh->ah);
|
|
while ((skb = __skb_dequeue(&neigh->queue))) {
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
if (ipoib_cm_get(neigh))
|
|
ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
|
|
ipoib_dbg(ipoib_priv(dev),
|
|
"neigh free for %06x %pI6\n",
|
|
IPOIB_QPN(neigh->daddr),
|
|
neigh->daddr + 4);
|
|
kfree(neigh);
|
|
if (atomic_dec_and_test(&priv->ntbl.entries)) {
|
|
if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags))
|
|
complete(&priv->ntbl.flushed);
|
|
}
|
|
}
|
|
|
|
static void ipoib_neigh_reclaim(struct rcu_head *rp)
|
|
{
|
|
/* Called as a result of removal from hash table */
|
|
struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu);
|
|
/* note TX context may hold another ref */
|
|
ipoib_neigh_put(neigh);
|
|
}
|
|
|
|
void ipoib_neigh_free(struct ipoib_neigh *neigh)
|
|
{
|
|
struct net_device *dev = neigh->dev;
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_neigh_table *ntbl = &priv->ntbl;
|
|
struct ipoib_neigh_hash *htbl;
|
|
struct ipoib_neigh __rcu **np;
|
|
struct ipoib_neigh *n;
|
|
u32 hash_val;
|
|
|
|
htbl = rcu_dereference_protected(ntbl->htbl,
|
|
lockdep_is_held(&priv->lock));
|
|
if (!htbl)
|
|
return;
|
|
|
|
hash_val = ipoib_addr_hash(htbl, neigh->daddr);
|
|
np = &htbl->buckets[hash_val];
|
|
for (n = rcu_dereference_protected(*np,
|
|
lockdep_is_held(&priv->lock));
|
|
n != NULL;
|
|
n = rcu_dereference_protected(*np,
|
|
lockdep_is_held(&priv->lock))) {
|
|
if (n == neigh) {
|
|
/* found */
|
|
rcu_assign_pointer(*np,
|
|
rcu_dereference_protected(neigh->hnext,
|
|
lockdep_is_held(&priv->lock)));
|
|
/* remove from parent list */
|
|
list_del_init(&neigh->list);
|
|
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
|
|
return;
|
|
} else {
|
|
np = &n->hnext;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv)
|
|
{
|
|
struct ipoib_neigh_table *ntbl = &priv->ntbl;
|
|
struct ipoib_neigh_hash *htbl;
|
|
struct ipoib_neigh __rcu **buckets;
|
|
u32 size;
|
|
|
|
clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
|
|
ntbl->htbl = NULL;
|
|
htbl = kzalloc(sizeof(*htbl), GFP_KERNEL);
|
|
if (!htbl)
|
|
return -ENOMEM;
|
|
size = roundup_pow_of_two(arp_tbl.gc_thresh3);
|
|
buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL);
|
|
if (!buckets) {
|
|
kfree(htbl);
|
|
return -ENOMEM;
|
|
}
|
|
htbl->size = size;
|
|
htbl->mask = (size - 1);
|
|
htbl->buckets = buckets;
|
|
RCU_INIT_POINTER(ntbl->htbl, htbl);
|
|
htbl->ntbl = ntbl;
|
|
atomic_set(&ntbl->entries, 0);
|
|
|
|
/* start garbage collection */
|
|
queue_delayed_work(priv->wq, &priv->neigh_reap_task,
|
|
arp_tbl.gc_interval);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void neigh_hash_free_rcu(struct rcu_head *head)
|
|
{
|
|
struct ipoib_neigh_hash *htbl = container_of(head,
|
|
struct ipoib_neigh_hash,
|
|
rcu);
|
|
struct ipoib_neigh __rcu **buckets = htbl->buckets;
|
|
struct ipoib_neigh_table *ntbl = htbl->ntbl;
|
|
|
|
kvfree(buckets);
|
|
kfree(htbl);
|
|
complete(&ntbl->deleted);
|
|
}
|
|
|
|
void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct ipoib_neigh_table *ntbl = &priv->ntbl;
|
|
struct ipoib_neigh_hash *htbl;
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
/* remove all neigh connected to a given path or mcast */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
htbl = rcu_dereference_protected(ntbl->htbl,
|
|
lockdep_is_held(&priv->lock));
|
|
|
|
if (!htbl)
|
|
goto out_unlock;
|
|
|
|
for (i = 0; i < htbl->size; i++) {
|
|
struct ipoib_neigh *neigh;
|
|
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
|
|
|
|
while ((neigh = rcu_dereference_protected(*np,
|
|
lockdep_is_held(&priv->lock))) != NULL) {
|
|
/* delete neighs belong to this parent */
|
|
if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) {
|
|
rcu_assign_pointer(*np,
|
|
rcu_dereference_protected(neigh->hnext,
|
|
lockdep_is_held(&priv->lock)));
|
|
/* remove from parent list */
|
|
list_del_init(&neigh->list);
|
|
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
|
|
} else {
|
|
np = &neigh->hnext;
|
|
}
|
|
|
|
}
|
|
}
|
|
out_unlock:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static void ipoib_flush_neighs(struct ipoib_dev_priv *priv)
|
|
{
|
|
struct ipoib_neigh_table *ntbl = &priv->ntbl;
|
|
struct ipoib_neigh_hash *htbl;
|
|
unsigned long flags;
|
|
int i, wait_flushed = 0;
|
|
|
|
init_completion(&priv->ntbl.flushed);
|
|
set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
htbl = rcu_dereference_protected(ntbl->htbl,
|
|
lockdep_is_held(&priv->lock));
|
|
if (!htbl)
|
|
goto out_unlock;
|
|
|
|
wait_flushed = atomic_read(&priv->ntbl.entries);
|
|
if (!wait_flushed)
|
|
goto free_htbl;
|
|
|
|
for (i = 0; i < htbl->size; i++) {
|
|
struct ipoib_neigh *neigh;
|
|
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
|
|
|
|
while ((neigh = rcu_dereference_protected(*np,
|
|
lockdep_is_held(&priv->lock))) != NULL) {
|
|
rcu_assign_pointer(*np,
|
|
rcu_dereference_protected(neigh->hnext,
|
|
lockdep_is_held(&priv->lock)));
|
|
/* remove from path/mc list */
|
|
list_del_init(&neigh->list);
|
|
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
|
|
}
|
|
}
|
|
|
|
free_htbl:
|
|
rcu_assign_pointer(ntbl->htbl, NULL);
|
|
call_rcu(&htbl->rcu, neigh_hash_free_rcu);
|
|
|
|
out_unlock:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
if (wait_flushed)
|
|
wait_for_completion(&priv->ntbl.flushed);
|
|
}
|
|
|
|
static void ipoib_neigh_hash_uninit(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
ipoib_dbg(priv, "%s\n", __func__);
|
|
init_completion(&priv->ntbl.deleted);
|
|
|
|
cancel_delayed_work_sync(&priv->neigh_reap_task);
|
|
|
|
ipoib_flush_neighs(priv);
|
|
|
|
wait_for_completion(&priv->ntbl.deleted);
|
|
}
|
|
|
|
static void ipoib_napi_add(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
netif_napi_add(dev, &priv->recv_napi, ipoib_rx_poll, IPOIB_NUM_WC);
|
|
netif_napi_add(dev, &priv->send_napi, ipoib_tx_poll, MAX_SEND_CQE);
|
|
}
|
|
|
|
static void ipoib_napi_del(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
netif_napi_del(&priv->recv_napi);
|
|
netif_napi_del(&priv->send_napi);
|
|
}
|
|
|
|
static void ipoib_dev_uninit_default(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
ipoib_transport_dev_cleanup(dev);
|
|
|
|
ipoib_napi_del(dev);
|
|
|
|
ipoib_cm_dev_cleanup(dev);
|
|
|
|
kfree(priv->rx_ring);
|
|
vfree(priv->tx_ring);
|
|
|
|
priv->rx_ring = NULL;
|
|
priv->tx_ring = NULL;
|
|
}
|
|
|
|
static int ipoib_dev_init_default(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
ipoib_napi_add(dev);
|
|
|
|
/* Allocate RX/TX "rings" to hold queued skbs */
|
|
priv->rx_ring = kcalloc(ipoib_recvq_size,
|
|
sizeof(*priv->rx_ring),
|
|
GFP_KERNEL);
|
|
if (!priv->rx_ring)
|
|
goto out;
|
|
|
|
priv->tx_ring = vzalloc(array_size(ipoib_sendq_size,
|
|
sizeof(*priv->tx_ring)));
|
|
if (!priv->tx_ring) {
|
|
pr_warn("%s: failed to allocate TX ring (%d entries)\n",
|
|
priv->ca->name, ipoib_sendq_size);
|
|
goto out_rx_ring_cleanup;
|
|
}
|
|
|
|
/* priv->tx_head, tx_tail and global_tx_tail/head are already 0 */
|
|
|
|
if (ipoib_transport_dev_init(dev, priv->ca)) {
|
|
pr_warn("%s: ipoib_transport_dev_init failed\n",
|
|
priv->ca->name);
|
|
goto out_tx_ring_cleanup;
|
|
}
|
|
|
|
/* after qp created set dev address */
|
|
priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
|
|
priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
|
|
priv->dev->dev_addr[3] = (priv->qp->qp_num) & 0xff;
|
|
|
|
return 0;
|
|
|
|
out_tx_ring_cleanup:
|
|
vfree(priv->tx_ring);
|
|
|
|
out_rx_ring_cleanup:
|
|
kfree(priv->rx_ring);
|
|
|
|
out:
|
|
ipoib_napi_del(dev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr,
|
|
int cmd)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
if (!priv->rn_ops->ndo_do_ioctl)
|
|
return -EOPNOTSUPP;
|
|
|
|
return priv->rn_ops->ndo_do_ioctl(dev, ifr, cmd);
|
|
}
|
|
|
|
static int ipoib_dev_init(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
int ret = -ENOMEM;
|
|
|
|
priv->qp = NULL;
|
|
|
|
/*
|
|
* the various IPoIB tasks assume they will never race against
|
|
* themselves, so always use a single thread workqueue
|
|
*/
|
|
priv->wq = alloc_ordered_workqueue("ipoib_wq", WQ_MEM_RECLAIM);
|
|
if (!priv->wq) {
|
|
pr_warn("%s: failed to allocate device WQ\n", dev->name);
|
|
goto out;
|
|
}
|
|
|
|
/* create pd, which used both for control and datapath*/
|
|
priv->pd = ib_alloc_pd(priv->ca, 0);
|
|
if (IS_ERR(priv->pd)) {
|
|
pr_warn("%s: failed to allocate PD\n", priv->ca->name);
|
|
goto clean_wq;
|
|
}
|
|
|
|
ret = priv->rn_ops->ndo_init(dev);
|
|
if (ret) {
|
|
pr_warn("%s failed to init HW resource\n", dev->name);
|
|
goto out_free_pd;
|
|
}
|
|
|
|
ret = ipoib_neigh_hash_init(priv);
|
|
if (ret) {
|
|
pr_warn("%s failed to init neigh hash\n", dev->name);
|
|
goto out_dev_uninit;
|
|
}
|
|
|
|
if (dev->flags & IFF_UP) {
|
|
if (ipoib_ib_dev_open(dev)) {
|
|
pr_warn("%s failed to open device\n", dev->name);
|
|
ret = -ENODEV;
|
|
goto out_hash_uninit;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_hash_uninit:
|
|
ipoib_neigh_hash_uninit(dev);
|
|
|
|
out_dev_uninit:
|
|
ipoib_ib_dev_cleanup(dev);
|
|
|
|
out_free_pd:
|
|
if (priv->pd) {
|
|
ib_dealloc_pd(priv->pd);
|
|
priv->pd = NULL;
|
|
}
|
|
|
|
clean_wq:
|
|
if (priv->wq) {
|
|
destroy_workqueue(priv->wq);
|
|
priv->wq = NULL;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This must be called before doing an unregister_netdev on a parent device to
|
|
* shutdown the IB event handler.
|
|
*/
|
|
static void ipoib_parent_unregister_pre(struct net_device *ndev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(ndev);
|
|
|
|
/*
|
|
* ipoib_set_mac checks netif_running before pushing work, clearing
|
|
* running ensures the it will not add more work.
|
|
*/
|
|
rtnl_lock();
|
|
dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP, NULL);
|
|
rtnl_unlock();
|
|
|
|
/* ipoib_event() cannot be running once this returns */
|
|
ib_unregister_event_handler(&priv->event_handler);
|
|
|
|
/*
|
|
* Work on the queue grabs the rtnl lock, so this cannot be done while
|
|
* also holding it.
|
|
*/
|
|
flush_workqueue(ipoib_workqueue);
|
|
}
|
|
|
|
static void ipoib_set_dev_features(struct ipoib_dev_priv *priv)
|
|
{
|
|
priv->hca_caps = priv->ca->attrs.device_cap_flags;
|
|
|
|
if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
|
|
priv->dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
|
|
|
|
if (priv->hca_caps & IB_DEVICE_UD_TSO)
|
|
priv->dev->hw_features |= NETIF_F_TSO;
|
|
|
|
priv->dev->features |= priv->dev->hw_features;
|
|
}
|
|
}
|
|
|
|
static int ipoib_parent_init(struct net_device *ndev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(ndev);
|
|
struct ib_port_attr attr;
|
|
int result;
|
|
|
|
result = ib_query_port(priv->ca, priv->port, &attr);
|
|
if (result) {
|
|
pr_warn("%s: ib_query_port %d failed\n", priv->ca->name,
|
|
priv->port);
|
|
return result;
|
|
}
|
|
priv->max_ib_mtu = rdma_mtu_from_attr(priv->ca, priv->port, &attr);
|
|
|
|
result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey);
|
|
if (result) {
|
|
pr_warn("%s: ib_query_pkey port %d failed (ret = %d)\n",
|
|
priv->ca->name, priv->port, result);
|
|
return result;
|
|
}
|
|
|
|
result = rdma_query_gid(priv->ca, priv->port, 0, &priv->local_gid);
|
|
if (result) {
|
|
pr_warn("%s: rdma_query_gid port %d failed (ret = %d)\n",
|
|
priv->ca->name, priv->port, result);
|
|
return result;
|
|
}
|
|
memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw,
|
|
sizeof(union ib_gid));
|
|
|
|
SET_NETDEV_DEV(priv->dev, priv->ca->dev.parent);
|
|
priv->dev->dev_port = priv->port - 1;
|
|
/* Let's set this one too for backwards compatibility. */
|
|
priv->dev->dev_id = priv->port - 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipoib_child_init(struct net_device *ndev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(ndev);
|
|
struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
|
|
|
|
priv->max_ib_mtu = ppriv->max_ib_mtu;
|
|
set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
|
|
if (memchr_inv(priv->dev->dev_addr, 0, INFINIBAND_ALEN))
|
|
memcpy(&priv->local_gid, priv->dev->dev_addr + 4,
|
|
sizeof(priv->local_gid));
|
|
else {
|
|
memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr,
|
|
INFINIBAND_ALEN);
|
|
memcpy(&priv->local_gid, &ppriv->local_gid,
|
|
sizeof(priv->local_gid));
|
|
}
|
|
}
|
|
|
|
static int ipoib_ndo_init(struct net_device *ndev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(ndev);
|
|
int rc;
|
|
struct rdma_netdev *rn = netdev_priv(ndev);
|
|
|
|
if (priv->parent) {
|
|
ipoib_child_init(ndev);
|
|
} else {
|
|
rc = ipoib_parent_init(ndev);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
/* MTU will be reset when mcast join happens */
|
|
ndev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
|
|
priv->mcast_mtu = priv->admin_mtu = ndev->mtu;
|
|
rn->mtu = priv->mcast_mtu;
|
|
ndev->max_mtu = IPOIB_CM_MTU;
|
|
|
|
ndev->neigh_priv_len = sizeof(struct ipoib_neigh);
|
|
|
|
/*
|
|
* Set the full membership bit, so that we join the right
|
|
* broadcast group, etc.
|
|
*/
|
|
priv->pkey |= 0x8000;
|
|
|
|
ndev->broadcast[8] = priv->pkey >> 8;
|
|
ndev->broadcast[9] = priv->pkey & 0xff;
|
|
set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
|
|
|
|
ipoib_set_dev_features(priv);
|
|
|
|
rc = ipoib_dev_init(ndev);
|
|
if (rc) {
|
|
pr_warn("%s: failed to initialize device: %s port %d (ret = %d)\n",
|
|
priv->ca->name, priv->dev->name, priv->port, rc);
|
|
return rc;
|
|
}
|
|
|
|
if (priv->parent) {
|
|
struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
|
|
|
|
dev_hold(priv->parent);
|
|
|
|
down_write(&ppriv->vlan_rwsem);
|
|
list_add_tail(&priv->list, &ppriv->child_intfs);
|
|
up_write(&ppriv->vlan_rwsem);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipoib_ndo_uninit(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/*
|
|
* ipoib_remove_one guarantees the children are removed before the
|
|
* parent, and that is the only place where a parent can be removed.
|
|
*/
|
|
WARN_ON(!list_empty(&priv->child_intfs));
|
|
|
|
if (priv->parent) {
|
|
struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
|
|
|
|
down_write(&ppriv->vlan_rwsem);
|
|
list_del(&priv->list);
|
|
up_write(&ppriv->vlan_rwsem);
|
|
}
|
|
|
|
ipoib_neigh_hash_uninit(dev);
|
|
|
|
ipoib_ib_dev_cleanup(dev);
|
|
|
|
/* no more works over the priv->wq */
|
|
if (priv->wq) {
|
|
/* See ipoib_mcast_carrier_on_task() */
|
|
WARN_ON(test_bit(IPOIB_FLAG_OPER_UP, &priv->flags));
|
|
flush_workqueue(priv->wq);
|
|
destroy_workqueue(priv->wq);
|
|
priv->wq = NULL;
|
|
}
|
|
|
|
if (priv->parent)
|
|
dev_put(priv->parent);
|
|
}
|
|
|
|
static int ipoib_set_vf_link_state(struct net_device *dev, int vf, int link_state)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
return ib_set_vf_link_state(priv->ca, vf, priv->port, link_state);
|
|
}
|
|
|
|
static int ipoib_get_vf_config(struct net_device *dev, int vf,
|
|
struct ifla_vf_info *ivf)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
int err;
|
|
|
|
err = ib_get_vf_config(priv->ca, vf, priv->port, ivf);
|
|
if (err)
|
|
return err;
|
|
|
|
ivf->vf = vf;
|
|
memcpy(ivf->mac, dev->dev_addr, dev->addr_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ipoib_set_vf_guid(struct net_device *dev, int vf, u64 guid, int type)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
if (type != IFLA_VF_IB_NODE_GUID && type != IFLA_VF_IB_PORT_GUID)
|
|
return -EINVAL;
|
|
|
|
return ib_set_vf_guid(priv->ca, vf, priv->port, guid, type);
|
|
}
|
|
|
|
static int ipoib_get_vf_guid(struct net_device *dev, int vf,
|
|
struct ifla_vf_guid *node_guid,
|
|
struct ifla_vf_guid *port_guid)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
return ib_get_vf_guid(priv->ca, vf, priv->port, node_guid, port_guid);
|
|
}
|
|
|
|
static int ipoib_get_vf_stats(struct net_device *dev, int vf,
|
|
struct ifla_vf_stats *vf_stats)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
return ib_get_vf_stats(priv->ca, vf, priv->port, vf_stats);
|
|
}
|
|
|
|
static const struct header_ops ipoib_header_ops = {
|
|
.create = ipoib_hard_header,
|
|
};
|
|
|
|
static const struct net_device_ops ipoib_netdev_ops_pf = {
|
|
.ndo_init = ipoib_ndo_init,
|
|
.ndo_uninit = ipoib_ndo_uninit,
|
|
.ndo_open = ipoib_open,
|
|
.ndo_stop = ipoib_stop,
|
|
.ndo_change_mtu = ipoib_change_mtu,
|
|
.ndo_fix_features = ipoib_fix_features,
|
|
.ndo_start_xmit = ipoib_start_xmit,
|
|
.ndo_tx_timeout = ipoib_timeout,
|
|
.ndo_set_rx_mode = ipoib_set_mcast_list,
|
|
.ndo_get_iflink = ipoib_get_iflink,
|
|
.ndo_set_vf_link_state = ipoib_set_vf_link_state,
|
|
.ndo_get_vf_config = ipoib_get_vf_config,
|
|
.ndo_get_vf_stats = ipoib_get_vf_stats,
|
|
.ndo_get_vf_guid = ipoib_get_vf_guid,
|
|
.ndo_set_vf_guid = ipoib_set_vf_guid,
|
|
.ndo_set_mac_address = ipoib_set_mac,
|
|
.ndo_get_stats64 = ipoib_get_stats,
|
|
.ndo_do_ioctl = ipoib_ioctl,
|
|
};
|
|
|
|
static const struct net_device_ops ipoib_netdev_ops_vf = {
|
|
.ndo_init = ipoib_ndo_init,
|
|
.ndo_uninit = ipoib_ndo_uninit,
|
|
.ndo_open = ipoib_open,
|
|
.ndo_stop = ipoib_stop,
|
|
.ndo_change_mtu = ipoib_change_mtu,
|
|
.ndo_fix_features = ipoib_fix_features,
|
|
.ndo_start_xmit = ipoib_start_xmit,
|
|
.ndo_tx_timeout = ipoib_timeout,
|
|
.ndo_set_rx_mode = ipoib_set_mcast_list,
|
|
.ndo_get_iflink = ipoib_get_iflink,
|
|
.ndo_get_stats64 = ipoib_get_stats,
|
|
.ndo_do_ioctl = ipoib_ioctl,
|
|
};
|
|
|
|
static const struct net_device_ops ipoib_netdev_default_pf = {
|
|
.ndo_init = ipoib_dev_init_default,
|
|
.ndo_uninit = ipoib_dev_uninit_default,
|
|
.ndo_open = ipoib_ib_dev_open_default,
|
|
.ndo_stop = ipoib_ib_dev_stop_default,
|
|
};
|
|
|
|
void ipoib_setup_common(struct net_device *dev)
|
|
{
|
|
dev->header_ops = &ipoib_header_ops;
|
|
dev->netdev_ops = &ipoib_netdev_default_pf;
|
|
|
|
ipoib_set_ethtool_ops(dev);
|
|
|
|
dev->watchdog_timeo = HZ;
|
|
|
|
dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
|
|
|
|
dev->hard_header_len = IPOIB_HARD_LEN;
|
|
dev->addr_len = INFINIBAND_ALEN;
|
|
dev->type = ARPHRD_INFINIBAND;
|
|
dev->tx_queue_len = ipoib_sendq_size * 2;
|
|
dev->features = (NETIF_F_VLAN_CHALLENGED |
|
|
NETIF_F_HIGHDMA);
|
|
netif_keep_dst(dev);
|
|
|
|
memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
|
|
|
|
/*
|
|
* unregister_netdev always frees the netdev, we use this mode
|
|
* consistently to unify all the various unregister paths, including
|
|
* those connected to rtnl_link_ops which require it.
|
|
*/
|
|
dev->needs_free_netdev = true;
|
|
}
|
|
|
|
static void ipoib_build_priv(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
|
|
priv->dev = dev;
|
|
spin_lock_init(&priv->lock);
|
|
init_rwsem(&priv->vlan_rwsem);
|
|
mutex_init(&priv->mcast_mutex);
|
|
|
|
INIT_LIST_HEAD(&priv->path_list);
|
|
INIT_LIST_HEAD(&priv->child_intfs);
|
|
INIT_LIST_HEAD(&priv->dead_ahs);
|
|
INIT_LIST_HEAD(&priv->multicast_list);
|
|
|
|
INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
|
|
INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
|
|
INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light);
|
|
INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal);
|
|
INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
|
|
INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
|
|
INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
|
|
INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh);
|
|
}
|
|
|
|
static struct net_device *ipoib_alloc_netdev(struct ib_device *hca, u8 port,
|
|
const char *name)
|
|
{
|
|
struct net_device *dev;
|
|
|
|
dev = rdma_alloc_netdev(hca, port, RDMA_NETDEV_IPOIB, name,
|
|
NET_NAME_UNKNOWN, ipoib_setup_common);
|
|
if (!IS_ERR(dev) || PTR_ERR(dev) != -EOPNOTSUPP)
|
|
return dev;
|
|
|
|
dev = alloc_netdev(sizeof(struct rdma_netdev), name, NET_NAME_UNKNOWN,
|
|
ipoib_setup_common);
|
|
if (!dev)
|
|
return ERR_PTR(-ENOMEM);
|
|
return dev;
|
|
}
|
|
|
|
int ipoib_intf_init(struct ib_device *hca, u8 port, const char *name,
|
|
struct net_device *dev)
|
|
{
|
|
struct rdma_netdev *rn = netdev_priv(dev);
|
|
struct ipoib_dev_priv *priv;
|
|
int rc;
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->ca = hca;
|
|
priv->port = port;
|
|
|
|
rc = rdma_init_netdev(hca, port, RDMA_NETDEV_IPOIB, name,
|
|
NET_NAME_UNKNOWN, ipoib_setup_common, dev);
|
|
if (rc) {
|
|
if (rc != -EOPNOTSUPP)
|
|
goto out;
|
|
|
|
rn->send = ipoib_send;
|
|
rn->attach_mcast = ipoib_mcast_attach;
|
|
rn->detach_mcast = ipoib_mcast_detach;
|
|
rn->hca = hca;
|
|
}
|
|
|
|
priv->rn_ops = dev->netdev_ops;
|
|
|
|
if (hca->attrs.device_cap_flags & IB_DEVICE_VIRTUAL_FUNCTION)
|
|
dev->netdev_ops = &ipoib_netdev_ops_vf;
|
|
else
|
|
dev->netdev_ops = &ipoib_netdev_ops_pf;
|
|
|
|
rn->clnt_priv = priv;
|
|
/*
|
|
* Only the child register_netdev flows can handle priv_destructor
|
|
* being set, so we force it to NULL here and handle manually until it
|
|
* is safe to turn on.
|
|
*/
|
|
priv->next_priv_destructor = dev->priv_destructor;
|
|
dev->priv_destructor = NULL;
|
|
|
|
ipoib_build_priv(dev);
|
|
|
|
return 0;
|
|
|
|
out:
|
|
kfree(priv);
|
|
return rc;
|
|
}
|
|
|
|
struct net_device *ipoib_intf_alloc(struct ib_device *hca, u8 port,
|
|
const char *name)
|
|
{
|
|
struct net_device *dev;
|
|
int rc;
|
|
|
|
dev = ipoib_alloc_netdev(hca, port, name);
|
|
if (IS_ERR(dev))
|
|
return dev;
|
|
|
|
rc = ipoib_intf_init(hca, port, name, dev);
|
|
if (rc) {
|
|
free_netdev(dev);
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
/*
|
|
* Upon success the caller must ensure ipoib_intf_free is called or
|
|
* register_netdevice succeed'd and priv_destructor is set to
|
|
* ipoib_intf_free.
|
|
*/
|
|
return dev;
|
|
}
|
|
|
|
void ipoib_intf_free(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct rdma_netdev *rn = netdev_priv(dev);
|
|
|
|
dev->priv_destructor = priv->next_priv_destructor;
|
|
if (dev->priv_destructor)
|
|
dev->priv_destructor(dev);
|
|
|
|
/*
|
|
* There are some error flows around register_netdev failing that may
|
|
* attempt to call priv_destructor twice, prevent that from happening.
|
|
*/
|
|
dev->priv_destructor = NULL;
|
|
|
|
/* unregister/destroy is very complicated. Make bugs more obvious. */
|
|
rn->clnt_priv = NULL;
|
|
|
|
kfree(priv);
|
|
}
|
|
|
|
static ssize_t show_pkey(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_device *ndev = to_net_dev(dev);
|
|
struct ipoib_dev_priv *priv = ipoib_priv(ndev);
|
|
|
|
return sprintf(buf, "0x%04x\n", priv->pkey);
|
|
}
|
|
static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
|
|
|
|
static ssize_t show_umcast(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_device *ndev = to_net_dev(dev);
|
|
struct ipoib_dev_priv *priv = ipoib_priv(ndev);
|
|
|
|
return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
|
|
}
|
|
|
|
void ipoib_set_umcast(struct net_device *ndev, int umcast_val)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(ndev);
|
|
|
|
if (umcast_val > 0) {
|
|
set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
|
|
ipoib_warn(priv, "ignoring multicast groups joined directly "
|
|
"by userspace\n");
|
|
} else
|
|
clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
|
|
}
|
|
|
|
static ssize_t set_umcast(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
|
|
|
|
ipoib_set_umcast(to_net_dev(dev), umcast_val);
|
|
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
|
|
|
|
int ipoib_add_umcast_attr(struct net_device *dev)
|
|
{
|
|
return device_create_file(&dev->dev, &dev_attr_umcast);
|
|
}
|
|
|
|
static void set_base_guid(struct ipoib_dev_priv *priv, union ib_gid *gid)
|
|
{
|
|
struct ipoib_dev_priv *child_priv;
|
|
struct net_device *netdev = priv->dev;
|
|
|
|
netif_addr_lock_bh(netdev);
|
|
|
|
memcpy(&priv->local_gid.global.interface_id,
|
|
&gid->global.interface_id,
|
|
sizeof(gid->global.interface_id));
|
|
memcpy(netdev->dev_addr + 4, &priv->local_gid, sizeof(priv->local_gid));
|
|
clear_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
|
|
|
|
netif_addr_unlock_bh(netdev);
|
|
|
|
if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
|
|
down_read(&priv->vlan_rwsem);
|
|
list_for_each_entry(child_priv, &priv->child_intfs, list)
|
|
set_base_guid(child_priv, gid);
|
|
up_read(&priv->vlan_rwsem);
|
|
}
|
|
}
|
|
|
|
static int ipoib_check_lladdr(struct net_device *dev,
|
|
struct sockaddr_storage *ss)
|
|
{
|
|
union ib_gid *gid = (union ib_gid *)(ss->__data + 4);
|
|
int ret = 0;
|
|
|
|
netif_addr_lock_bh(dev);
|
|
|
|
/* Make sure the QPN, reserved and subnet prefix match the current
|
|
* lladdr, it also makes sure the lladdr is unicast.
|
|
*/
|
|
if (memcmp(dev->dev_addr, ss->__data,
|
|
4 + sizeof(gid->global.subnet_prefix)) ||
|
|
gid->global.interface_id == 0)
|
|
ret = -EINVAL;
|
|
|
|
netif_addr_unlock_bh(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ipoib_set_mac(struct net_device *dev, void *addr)
|
|
{
|
|
struct ipoib_dev_priv *priv = ipoib_priv(dev);
|
|
struct sockaddr_storage *ss = addr;
|
|
int ret;
|
|
|
|
if (!(dev->priv_flags & IFF_LIVE_ADDR_CHANGE) && netif_running(dev))
|
|
return -EBUSY;
|
|
|
|
ret = ipoib_check_lladdr(dev, ss);
|
|
if (ret)
|
|
return ret;
|
|
|
|
set_base_guid(priv, (union ib_gid *)(ss->__data + 4));
|
|
|
|
queue_work(ipoib_workqueue, &priv->flush_light);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t create_child(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int pkey;
|
|
int ret;
|
|
|
|
if (sscanf(buf, "%i", &pkey) != 1)
|
|
return -EINVAL;
|
|
|
|
if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000)
|
|
return -EINVAL;
|
|
|
|
ret = ipoib_vlan_add(to_net_dev(dev), pkey);
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child);
|
|
|
|
static ssize_t delete_child(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int pkey;
|
|
int ret;
|
|
|
|
if (sscanf(buf, "%i", &pkey) != 1)
|
|
return -EINVAL;
|
|
|
|
if (pkey < 0 || pkey > 0xffff)
|
|
return -EINVAL;
|
|
|
|
ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
|
|
|
|
return ret ? ret : count;
|
|
|
|
}
|
|
static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child);
|
|
|
|
int ipoib_add_pkey_attr(struct net_device *dev)
|
|
{
|
|
return device_create_file(&dev->dev, &dev_attr_pkey);
|
|
}
|
|
|
|
/*
|
|
* We erroneously exposed the iface's port number in the dev_id
|
|
* sysfs field long after dev_port was introduced for that purpose[1],
|
|
* and we need to stop everyone from relying on that.
|
|
* Let's overload the shower routine for the dev_id file here
|
|
* to gently bring the issue up.
|
|
*
|
|
* [1] https://www.spinics.net/lists/netdev/msg272123.html
|
|
*/
|
|
static ssize_t dev_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net_device *ndev = to_net_dev(dev);
|
|
|
|
/*
|
|
* ndev->dev_port will be equal to 0 in old kernel prior to commit
|
|
* 9b8b2a323008 ("IB/ipoib: Use dev_port to expose network interface
|
|
* port numbers") Zero was chosen as special case for user space
|
|
* applications to fallback and query dev_id to check if it has
|
|
* different value or not.
|
|
*
|
|
* Don't print warning in such scenario.
|
|
*
|
|
* https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c#L358
|
|
*/
|
|
if (ndev->dev_port && ndev->dev_id == ndev->dev_port)
|
|
netdev_info_once(ndev,
|
|
"\"%s\" wants to know my dev_id. Should it look at dev_port instead? See Documentation/ABI/testing/sysfs-class-net for more info.\n",
|
|
current->comm);
|
|
|
|
return sprintf(buf, "%#x\n", ndev->dev_id);
|
|
}
|
|
static DEVICE_ATTR_RO(dev_id);
|
|
|
|
static int ipoib_intercept_dev_id_attr(struct net_device *dev)
|
|
{
|
|
device_remove_file(&dev->dev, &dev_attr_dev_id);
|
|
return device_create_file(&dev->dev, &dev_attr_dev_id);
|
|
}
|
|
|
|
static struct net_device *ipoib_add_port(const char *format,
|
|
struct ib_device *hca, u8 port)
|
|
{
|
|
struct rtnl_link_ops *ops = ipoib_get_link_ops();
|
|
struct rdma_netdev_alloc_params params;
|
|
struct ipoib_dev_priv *priv;
|
|
struct net_device *ndev;
|
|
int result;
|
|
|
|
ndev = ipoib_intf_alloc(hca, port, format);
|
|
if (IS_ERR(ndev)) {
|
|
pr_warn("%s, %d: ipoib_intf_alloc failed %ld\n", hca->name, port,
|
|
PTR_ERR(ndev));
|
|
return ndev;
|
|
}
|
|
priv = ipoib_priv(ndev);
|
|
|
|
INIT_IB_EVENT_HANDLER(&priv->event_handler,
|
|
priv->ca, ipoib_event);
|
|
ib_register_event_handler(&priv->event_handler);
|
|
|
|
/* call event handler to ensure pkey in sync */
|
|
queue_work(ipoib_workqueue, &priv->flush_heavy);
|
|
|
|
ndev->rtnl_link_ops = ipoib_get_link_ops();
|
|
|
|
result = register_netdev(ndev);
|
|
if (result) {
|
|
pr_warn("%s: couldn't register ipoib port %d; error %d\n",
|
|
hca->name, port, result);
|
|
|
|
ipoib_parent_unregister_pre(ndev);
|
|
ipoib_intf_free(ndev);
|
|
free_netdev(ndev);
|
|
|
|
return ERR_PTR(result);
|
|
}
|
|
|
|
if (hca->ops.rdma_netdev_get_params) {
|
|
int rc = hca->ops.rdma_netdev_get_params(hca, port,
|
|
RDMA_NETDEV_IPOIB,
|
|
¶ms);
|
|
|
|
if (!rc && ops->priv_size < params.sizeof_priv)
|
|
ops->priv_size = params.sizeof_priv;
|
|
}
|
|
/*
|
|
* We cannot set priv_destructor before register_netdev because we
|
|
* need priv to be always valid during the error flow to execute
|
|
* ipoib_parent_unregister_pre(). Instead handle it manually and only
|
|
* enter priv_destructor mode once we are completely registered.
|
|
*/
|
|
ndev->priv_destructor = ipoib_intf_free;
|
|
|
|
if (ipoib_intercept_dev_id_attr(ndev))
|
|
goto sysfs_failed;
|
|
if (ipoib_cm_add_mode_attr(ndev))
|
|
goto sysfs_failed;
|
|
if (ipoib_add_pkey_attr(ndev))
|
|
goto sysfs_failed;
|
|
if (ipoib_add_umcast_attr(ndev))
|
|
goto sysfs_failed;
|
|
if (device_create_file(&ndev->dev, &dev_attr_create_child))
|
|
goto sysfs_failed;
|
|
if (device_create_file(&ndev->dev, &dev_attr_delete_child))
|
|
goto sysfs_failed;
|
|
|
|
return ndev;
|
|
|
|
sysfs_failed:
|
|
ipoib_parent_unregister_pre(ndev);
|
|
unregister_netdev(ndev);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
static int ipoib_add_one(struct ib_device *device)
|
|
{
|
|
struct list_head *dev_list;
|
|
struct net_device *dev;
|
|
struct ipoib_dev_priv *priv;
|
|
unsigned int p;
|
|
int count = 0;
|
|
|
|
dev_list = kmalloc(sizeof(*dev_list), GFP_KERNEL);
|
|
if (!dev_list)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(dev_list);
|
|
|
|
rdma_for_each_port (device, p) {
|
|
if (!rdma_protocol_ib(device, p))
|
|
continue;
|
|
dev = ipoib_add_port("ib%d", device, p);
|
|
if (!IS_ERR(dev)) {
|
|
priv = ipoib_priv(dev);
|
|
list_add_tail(&priv->list, dev_list);
|
|
count++;
|
|
}
|
|
}
|
|
|
|
if (!count) {
|
|
kfree(dev_list);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
ib_set_client_data(device, &ipoib_client, dev_list);
|
|
return 0;
|
|
}
|
|
|
|
static void ipoib_remove_one(struct ib_device *device, void *client_data)
|
|
{
|
|
struct ipoib_dev_priv *priv, *tmp, *cpriv, *tcpriv;
|
|
struct list_head *dev_list = client_data;
|
|
|
|
list_for_each_entry_safe(priv, tmp, dev_list, list) {
|
|
LIST_HEAD(head);
|
|
ipoib_parent_unregister_pre(priv->dev);
|
|
|
|
rtnl_lock();
|
|
|
|
list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs,
|
|
list)
|
|
unregister_netdevice_queue(cpriv->dev, &head);
|
|
unregister_netdevice_queue(priv->dev, &head);
|
|
unregister_netdevice_many(&head);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
kfree(dev_list);
|
|
}
|
|
|
|
#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
|
|
static struct notifier_block ipoib_netdev_notifier = {
|
|
.notifier_call = ipoib_netdev_event,
|
|
};
|
|
#endif
|
|
|
|
static int __init ipoib_init_module(void)
|
|
{
|
|
int ret;
|
|
|
|
ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
|
|
ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
|
|
ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
|
|
|
|
ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
|
|
ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
|
|
ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE);
|
|
#ifdef CONFIG_INFINIBAND_IPOIB_CM
|
|
ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
|
|
ipoib_max_conn_qp = max(ipoib_max_conn_qp, 0);
|
|
#endif
|
|
|
|
/*
|
|
* When copying small received packets, we only copy from the
|
|
* linear data part of the SKB, so we rely on this condition.
|
|
*/
|
|
BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE);
|
|
|
|
ipoib_register_debugfs();
|
|
|
|
/*
|
|
* We create a global workqueue here that is used for all flush
|
|
* operations. However, if you attempt to flush a workqueue
|
|
* from a task on that same workqueue, it deadlocks the system.
|
|
* We want to be able to flush the tasks associated with a
|
|
* specific net device, so we also create a workqueue for each
|
|
* netdevice. We queue up the tasks for that device only on
|
|
* its private workqueue, and we only queue up flush events
|
|
* on our global flush workqueue. This avoids the deadlocks.
|
|
*/
|
|
ipoib_workqueue = alloc_ordered_workqueue("ipoib_flush", 0);
|
|
if (!ipoib_workqueue) {
|
|
ret = -ENOMEM;
|
|
goto err_fs;
|
|
}
|
|
|
|
ib_sa_register_client(&ipoib_sa_client);
|
|
|
|
ret = ib_register_client(&ipoib_client);
|
|
if (ret)
|
|
goto err_sa;
|
|
|
|
ret = ipoib_netlink_init();
|
|
if (ret)
|
|
goto err_client;
|
|
|
|
#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
|
|
register_netdevice_notifier(&ipoib_netdev_notifier);
|
|
#endif
|
|
return 0;
|
|
|
|
err_client:
|
|
ib_unregister_client(&ipoib_client);
|
|
|
|
err_sa:
|
|
ib_sa_unregister_client(&ipoib_sa_client);
|
|
destroy_workqueue(ipoib_workqueue);
|
|
|
|
err_fs:
|
|
ipoib_unregister_debugfs();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ipoib_cleanup_module(void)
|
|
{
|
|
#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
|
|
unregister_netdevice_notifier(&ipoib_netdev_notifier);
|
|
#endif
|
|
ipoib_netlink_fini();
|
|
ib_unregister_client(&ipoib_client);
|
|
ib_sa_unregister_client(&ipoib_sa_client);
|
|
ipoib_unregister_debugfs();
|
|
destroy_workqueue(ipoib_workqueue);
|
|
}
|
|
|
|
module_init(ipoib_init_module);
|
|
module_exit(ipoib_cleanup_module);
|