![David J. Wilder](/assets/img/avatar_default.png)
IPoIB can miss a change in destination GID under some conditions. The problem is caused when ipoib_neigh->dgid contains a stale address. The fix is to set ipoib_neigh->dgid to zero in ipoib_neigh_alloc(). This can happen when a system using bonding on its IPoIB interfaces has switched its active interface from interface A to B and back to A. The system that fails over will not correctly processes the 2nd address change, as described below. When an address has changed neighbor->ha is updated with the new address. Each neighbor has an associated ipoib_neigh. ipoib_neigh->dgid also holds a copy of the remote node's hardware address. When an address changes neighbor->ha is updated by the network layer (arp code) with the new address. IPoIB detects this change in ipoib_start_xmit() by comparing neighbor->ha with ipoib_neigh->dgid. The bug is that ipoib_neigh->dgid may already contain the new address (A) thus the change from B to A is missed by ipoib. Here is the sequence of events: ipoib_neigh->dgid = A and neighbor->ha = A The address is switched to B (the first switch) neighbor->ha = B The change is seen in ipoib_start_xmit() -- neighbor->ha != ipoib_neigh->dgid so ipoib_neigh is released, and a new one is allocated. The allocator may return the same chunk of memory that was just released, therefore ipoib_neigh->dgid still contains A at this point. ipoib_neigh->dgid should be updated in neigh_add_path(), but if the following conditions are true dgid is not updated: 1) __path_find() returns a path 2) path->ah is NULL The remote system now switches from address B to A, neighbor->ha is updated to A. Now we have again : ipoib_neigh->dgid = A and neighbor->ha = A Since the addresses are the same ipoib won't process the change in address. Fix this by zeroing out the dgid field when allocating a new struct ipoib_neigh. Signed-off-by: David Wilder <dwilder@us.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
1470 lines
36 KiB
C
1470 lines
36 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 <net/dst.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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static int lro;
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module_param(lro, bool, 0444);
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MODULE_PARM_DESC(lro, "Enable LRO (Large Receive Offload)");
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static int lro_max_aggr = IPOIB_LRO_MAX_AGGR;
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module_param(lro_max_aggr, int, 0644);
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MODULE_PARM_DESC(lro_max_aggr, "LRO: Max packets to be aggregated "
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"(default = 64)");
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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 void ipoib_add_one(struct ib_device *device);
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static void ipoib_remove_one(struct ib_device *device);
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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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};
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int ipoib_open(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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ipoib_dbg(priv, "bringing up interface\n");
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set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
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if (ipoib_pkey_dev_delay_open(dev))
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return 0;
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if (ipoib_ib_dev_open(dev))
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goto err_disable;
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if (ipoib_ib_dev_up(dev))
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goto err_stop;
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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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mutex_lock(&priv->vlan_mutex);
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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);
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}
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mutex_unlock(&priv->vlan_mutex);
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}
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netif_start_queue(dev);
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return 0;
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err_stop:
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ipoib_ib_dev_stop(dev, 1);
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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 = netdev_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, 0);
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ipoib_ib_dev_stop(dev, 0);
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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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mutex_lock(&priv->vlan_mutex);
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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);
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}
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mutex_unlock(&priv->vlan_mutex);
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}
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return 0;
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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 = netdev_priv(dev);
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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 > 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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dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
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return 0;
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}
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static struct ipoib_path *__path_find(struct net_device *dev, void *gid)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct rb_node *n = priv->path_tree.rb_node;
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struct ipoib_path *path;
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int ret;
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while (n) {
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path = rb_entry(n, struct ipoib_path, rb_node);
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ret = memcmp(gid, path->pathrec.dgid.raw,
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sizeof (union ib_gid));
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if (ret < 0)
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n = n->rb_left;
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else if (ret > 0)
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n = n->rb_right;
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else
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return path;
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}
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return NULL;
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}
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static int __path_add(struct net_device *dev, struct ipoib_path *path)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct rb_node **n = &priv->path_tree.rb_node;
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struct rb_node *pn = NULL;
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struct ipoib_path *tpath;
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int ret;
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while (*n) {
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pn = *n;
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tpath = rb_entry(pn, struct ipoib_path, rb_node);
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ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
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sizeof (union ib_gid));
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if (ret < 0)
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n = &pn->rb_left;
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else if (ret > 0)
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n = &pn->rb_right;
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else
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return -EEXIST;
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}
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rb_link_node(&path->rb_node, pn, n);
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rb_insert_color(&path->rb_node, &priv->path_tree);
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list_add_tail(&path->list, &priv->path_list);
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return 0;
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}
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static void path_free(struct net_device *dev, struct ipoib_path *path)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ipoib_neigh *neigh, *tn;
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struct sk_buff *skb;
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unsigned long flags;
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while ((skb = __skb_dequeue(&path->queue)))
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dev_kfree_skb_irq(skb);
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spin_lock_irqsave(&priv->lock, flags);
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list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
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/*
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* It's safe to call ipoib_put_ah() inside priv->lock
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* here, because we know that path->ah will always
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* hold one more reference, so ipoib_put_ah() will
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* never do more than decrement the ref count.
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*/
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if (neigh->ah)
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ipoib_put_ah(neigh->ah);
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ipoib_neigh_free(dev, neigh);
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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if (path->ah)
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ipoib_put_ah(path->ah);
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kfree(path);
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}
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#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
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struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
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{
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struct ipoib_path_iter *iter;
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iter = kmalloc(sizeof *iter, GFP_KERNEL);
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if (!iter)
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return NULL;
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iter->dev = dev;
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memset(iter->path.pathrec.dgid.raw, 0, 16);
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if (ipoib_path_iter_next(iter)) {
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kfree(iter);
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return NULL;
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}
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return iter;
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}
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int ipoib_path_iter_next(struct ipoib_path_iter *iter)
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{
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struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
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struct rb_node *n;
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struct ipoib_path *path;
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int ret = 1;
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spin_lock_irq(&priv->lock);
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n = rb_first(&priv->path_tree);
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while (n) {
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path = rb_entry(n, struct ipoib_path, rb_node);
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if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
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sizeof (union ib_gid)) < 0) {
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iter->path = *path;
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ret = 0;
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break;
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}
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n = rb_next(n);
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}
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spin_unlock_irq(&priv->lock);
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return ret;
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}
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void ipoib_path_iter_read(struct ipoib_path_iter *iter,
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struct ipoib_path *path)
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{
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*path = iter->path;
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}
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#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
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void ipoib_mark_paths_invalid(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ipoib_path *path, *tp;
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spin_lock_irq(&priv->lock);
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list_for_each_entry_safe(path, tp, &priv->path_list, list) {
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ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n",
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be16_to_cpu(path->pathrec.dlid),
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path->pathrec.dgid.raw);
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path->valid = 0;
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}
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spin_unlock_irq(&priv->lock);
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}
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void ipoib_flush_paths(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ipoib_path *path, *tp;
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LIST_HEAD(remove_list);
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unsigned long flags;
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netif_tx_lock_bh(dev);
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spin_lock_irqsave(&priv->lock, flags);
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list_splice_init(&priv->path_list, &remove_list);
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list_for_each_entry(path, &remove_list, list)
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rb_erase(&path->rb_node, &priv->path_tree);
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list_for_each_entry_safe(path, tp, &remove_list, list) {
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if (path->query)
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ib_sa_cancel_query(path->query_id, path->query);
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spin_unlock_irqrestore(&priv->lock, flags);
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netif_tx_unlock_bh(dev);
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wait_for_completion(&path->done);
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path_free(dev, path);
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netif_tx_lock_bh(dev);
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spin_lock_irqsave(&priv->lock, flags);
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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netif_tx_unlock_bh(dev);
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}
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static void path_rec_completion(int status,
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struct ib_sa_path_rec *pathrec,
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void *path_ptr)
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{
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struct ipoib_path *path = path_ptr;
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struct net_device *dev = path->dev;
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ipoib_ah *ah = NULL;
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struct ipoib_ah *old_ah = NULL;
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struct ipoib_neigh *neigh, *tn;
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struct sk_buff_head skqueue;
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struct sk_buff *skb;
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unsigned long flags;
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if (!status)
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ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n",
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be16_to_cpu(pathrec->dlid), pathrec->dgid.raw);
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else
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ipoib_dbg(priv, "PathRec status %d for GID %pI6\n",
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status, path->pathrec.dgid.raw);
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skb_queue_head_init(&skqueue);
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if (!status) {
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struct ib_ah_attr av;
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if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
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ah = ipoib_create_ah(dev, priv->pd, &av);
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}
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spin_lock_irqsave(&priv->lock, flags);
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if (ah) {
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path->pathrec = *pathrec;
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old_ah = path->ah;
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path->ah = ah;
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ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
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ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
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while ((skb = __skb_dequeue(&path->queue)))
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__skb_queue_tail(&skqueue, skb);
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list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
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if (neigh->ah) {
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WARN_ON(neigh->ah != old_ah);
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/*
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* Dropping the ah reference inside
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* priv->lock is safe here, because we
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* will hold one more reference from
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* the original value of path->ah (ie
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* old_ah).
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*/
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ipoib_put_ah(neigh->ah);
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}
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kref_get(&path->ah->ref);
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neigh->ah = path->ah;
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memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
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sizeof(union ib_gid));
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if (ipoib_cm_enabled(dev, neigh->neighbour)) {
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if (!ipoib_cm_get(neigh))
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ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
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path,
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neigh));
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if (!ipoib_cm_get(neigh)) {
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list_del(&neigh->list);
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if (neigh->ah)
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ipoib_put_ah(neigh->ah);
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ipoib_neigh_free(dev, neigh);
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continue;
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}
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}
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while ((skb = __skb_dequeue(&neigh->queue)))
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__skb_queue_tail(&skqueue, skb);
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}
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path->valid = 1;
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}
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path->query = NULL;
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complete(&path->done);
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|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
if (old_ah)
|
|
ipoib_put_ah(old_ah);
|
|
|
|
while ((skb = __skb_dequeue(&skqueue))) {
|
|
skb->dev = dev;
|
|
if (dev_queue_xmit(skb))
|
|
ipoib_warn(priv, "dev_queue_xmit failed "
|
|
"to requeue packet\n");
|
|
}
|
|
}
|
|
|
|
static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ipoib_path *path;
|
|
|
|
if (!priv->broadcast)
|
|
return NULL;
|
|
|
|
path = kzalloc(sizeof *path, GFP_ATOMIC);
|
|
if (!path)
|
|
return NULL;
|
|
|
|
path->dev = dev;
|
|
|
|
skb_queue_head_init(&path->queue);
|
|
|
|
INIT_LIST_HEAD(&path->neigh_list);
|
|
|
|
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;
|
|
|
|
return path;
|
|
}
|
|
|
|
static int path_rec_start(struct net_device *dev,
|
|
struct ipoib_path *path)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_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_add_path(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ipoib_path *path;
|
|
struct ipoib_neigh *neigh;
|
|
unsigned long flags;
|
|
|
|
neigh = ipoib_neigh_alloc(skb_dst(skb)->neighbour, skb->dev);
|
|
if (!neigh) {
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
path = __path_find(dev, skb_dst(skb)->neighbour->ha + 4);
|
|
if (!path) {
|
|
path = path_rec_create(dev, skb_dst(skb)->neighbour->ha + 4);
|
|
if (!path)
|
|
goto err_path;
|
|
|
|
__path_add(dev, path);
|
|
}
|
|
|
|
list_add_tail(&neigh->list, &path->neigh_list);
|
|
|
|
if (path->ah) {
|
|
kref_get(&path->ah->ref);
|
|
neigh->ah = path->ah;
|
|
memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
|
|
sizeof(union ib_gid));
|
|
|
|
if (ipoib_cm_enabled(dev, neigh->neighbour)) {
|
|
if (!ipoib_cm_get(neigh))
|
|
ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
|
|
if (!ipoib_cm_get(neigh)) {
|
|
list_del(&neigh->list);
|
|
if (neigh->ah)
|
|
ipoib_put_ah(neigh->ah);
|
|
ipoib_neigh_free(dev, neigh);
|
|
goto err_drop;
|
|
}
|
|
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
|
|
__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);
|
|
ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb_dst(skb)->neighbour->ha));
|
|
return;
|
|
}
|
|
} else {
|
|
neigh->ah = NULL;
|
|
|
|
if (!path->query && path_rec_start(dev, path))
|
|
goto err_list;
|
|
|
|
__skb_queue_tail(&neigh->queue, skb);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return;
|
|
|
|
err_list:
|
|
list_del(&neigh->list);
|
|
|
|
err_path:
|
|
ipoib_neigh_free(dev, neigh);
|
|
err_drop:
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
|
|
|
|
/* Look up path record for unicasts */
|
|
if (skb_dst(skb)->neighbour->ha[4] != 0xff) {
|
|
neigh_add_path(skb, dev);
|
|
return;
|
|
}
|
|
|
|
/* Add in the P_Key for multicasts */
|
|
skb_dst(skb)->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
|
|
skb_dst(skb)->neighbour->ha[9] = priv->pkey & 0xff;
|
|
ipoib_mcast_send(dev, skb_dst(skb)->neighbour->ha + 4, skb);
|
|
}
|
|
|
|
static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
|
|
struct ipoib_pseudoheader *phdr)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ipoib_path *path;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
path = __path_find(dev, phdr->hwaddr + 4);
|
|
if (!path || !path->valid) {
|
|
int new_path = 0;
|
|
|
|
if (!path) {
|
|
path = path_rec_create(dev, phdr->hwaddr + 4);
|
|
new_path = 1;
|
|
}
|
|
if (path) {
|
|
/* put pseudoheader back on for next time */
|
|
skb_push(skb, sizeof *phdr);
|
|
__skb_queue_tail(&path->queue, skb);
|
|
|
|
if (!path->query && path_rec_start(dev, path)) {
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
if (new_path)
|
|
path_free(dev, path);
|
|
return;
|
|
} else
|
|
__path_add(dev, path);
|
|
} else {
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return;
|
|
}
|
|
|
|
if (path->ah) {
|
|
ipoib_dbg(priv, "Send unicast ARP to %04x\n",
|
|
be16_to_cpu(path->pathrec.dlid));
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr));
|
|
return;
|
|
} else if ((path->query || !path_rec_start(dev, path)) &&
|
|
skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
|
|
/* put pseudoheader back on for next time */
|
|
skb_push(skb, sizeof *phdr);
|
|
__skb_queue_tail(&path->queue, skb);
|
|
} else {
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ipoib_neigh *neigh;
|
|
unsigned long flags;
|
|
|
|
if (likely(skb_dst(skb) && skb_dst(skb)->neighbour)) {
|
|
if (unlikely(!*to_ipoib_neigh(skb_dst(skb)->neighbour))) {
|
|
ipoib_path_lookup(skb, dev);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
neigh = *to_ipoib_neigh(skb_dst(skb)->neighbour);
|
|
|
|
if (unlikely((memcmp(&neigh->dgid.raw,
|
|
skb_dst(skb)->neighbour->ha + 4,
|
|
sizeof(union ib_gid))) ||
|
|
(neigh->dev != dev))) {
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
/*
|
|
* It's safe to call ipoib_put_ah() inside
|
|
* priv->lock here, because we know that
|
|
* path->ah will always hold one more reference,
|
|
* so ipoib_put_ah() will never do more than
|
|
* decrement the ref count.
|
|
*/
|
|
if (neigh->ah)
|
|
ipoib_put_ah(neigh->ah);
|
|
list_del(&neigh->list);
|
|
ipoib_neigh_free(dev, neigh);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ipoib_path_lookup(skb, dev);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
if (ipoib_cm_get(neigh)) {
|
|
if (ipoib_cm_up(neigh)) {
|
|
ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
|
|
return NETDEV_TX_OK;
|
|
}
|
|
} else if (neigh->ah) {
|
|
ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb_dst(skb)->neighbour->ha));
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
|
|
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);
|
|
}
|
|
} else {
|
|
struct ipoib_pseudoheader *phdr =
|
|
(struct ipoib_pseudoheader *) skb->data;
|
|
skb_pull(skb, sizeof *phdr);
|
|
|
|
if (phdr->hwaddr[4] == 0xff) {
|
|
/* Add in the P_Key for multicast*/
|
|
phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
|
|
phdr->hwaddr[9] = priv->pkey & 0xff;
|
|
|
|
ipoib_mcast_send(dev, phdr->hwaddr + 4, skb);
|
|
} else {
|
|
/* unicast GID -- should be ARP or RARP reply */
|
|
|
|
if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
|
|
(be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
|
|
ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x %pI6\n",
|
|
skb_dst(skb) ? "neigh" : "dst",
|
|
be16_to_cpup((__be16 *) skb->data),
|
|
IPOIB_QPN(phdr->hwaddr),
|
|
phdr->hwaddr + 4);
|
|
dev_kfree_skb_any(skb);
|
|
++dev->stats.tx_dropped;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
unicast_arp_send(skb, dev, phdr);
|
|
}
|
|
}
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static void ipoib_timeout(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
|
|
jiffies_to_msecs(jiffies - dev->trans_start));
|
|
ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
|
|
netif_queue_stopped(dev),
|
|
priv->tx_head, priv->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 len)
|
|
{
|
|
struct ipoib_header *header;
|
|
|
|
header = (struct ipoib_header *) skb_push(skb, sizeof *header);
|
|
|
|
header->proto = htons(type);
|
|
header->reserved = 0;
|
|
|
|
/*
|
|
* If we don't have a neighbour structure, stuff the
|
|
* destination address onto the front of the skb so we can
|
|
* figure out where to send the packet later.
|
|
*/
|
|
if ((!skb_dst(skb) || !skb_dst(skb)->neighbour) && daddr) {
|
|
struct ipoib_pseudoheader *phdr =
|
|
(struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
|
|
memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipoib_set_mcast_list(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
|
|
ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
|
|
return;
|
|
}
|
|
|
|
queue_work(ipoib_workqueue, &priv->restart_task);
|
|
}
|
|
|
|
static void ipoib_neigh_cleanup(struct neighbour *n)
|
|
{
|
|
struct ipoib_neigh *neigh;
|
|
struct ipoib_dev_priv *priv = netdev_priv(n->dev);
|
|
unsigned long flags;
|
|
struct ipoib_ah *ah = NULL;
|
|
|
|
neigh = *to_ipoib_neigh(n);
|
|
if (neigh)
|
|
priv = netdev_priv(neigh->dev);
|
|
else
|
|
return;
|
|
ipoib_dbg(priv,
|
|
"neigh_cleanup for %06x %pI6\n",
|
|
IPOIB_QPN(n->ha),
|
|
n->ha + 4);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
if (neigh->ah)
|
|
ah = neigh->ah;
|
|
list_del(&neigh->list);
|
|
ipoib_neigh_free(n->dev, neigh);
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
if (ah)
|
|
ipoib_put_ah(ah);
|
|
}
|
|
|
|
struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour,
|
|
struct net_device *dev)
|
|
{
|
|
struct ipoib_neigh *neigh;
|
|
|
|
neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
|
|
if (!neigh)
|
|
return NULL;
|
|
|
|
neigh->neighbour = neighbour;
|
|
neigh->dev = dev;
|
|
memset(&neigh->dgid.raw, 0, sizeof (union ib_gid));
|
|
*to_ipoib_neigh(neighbour) = neigh;
|
|
skb_queue_head_init(&neigh->queue);
|
|
ipoib_cm_set(neigh, NULL);
|
|
|
|
return neigh;
|
|
}
|
|
|
|
void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
|
|
{
|
|
struct sk_buff *skb;
|
|
*to_ipoib_neigh(neigh->neighbour) = NULL;
|
|
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));
|
|
kfree(neigh);
|
|
}
|
|
|
|
static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
|
|
{
|
|
parms->neigh_cleanup = ipoib_neigh_cleanup;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
/* Allocate RX/TX "rings" to hold queued skbs */
|
|
priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
|
|
GFP_KERNEL);
|
|
if (!priv->rx_ring) {
|
|
printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
|
|
ca->name, ipoib_recvq_size);
|
|
goto out;
|
|
}
|
|
|
|
priv->tx_ring = vmalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
|
|
if (!priv->tx_ring) {
|
|
printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
|
|
ca->name, ipoib_sendq_size);
|
|
goto out_rx_ring_cleanup;
|
|
}
|
|
memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring);
|
|
|
|
/* priv->tx_head, tx_tail & tx_outstanding are already 0 */
|
|
|
|
if (ipoib_ib_dev_init(dev, ca, port))
|
|
goto out_tx_ring_cleanup;
|
|
|
|
return 0;
|
|
|
|
out_tx_ring_cleanup:
|
|
vfree(priv->tx_ring);
|
|
|
|
out_rx_ring_cleanup:
|
|
kfree(priv->rx_ring);
|
|
|
|
out:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void ipoib_dev_cleanup(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
|
|
|
|
ipoib_delete_debug_files(dev);
|
|
|
|
/* Delete any child interfaces first */
|
|
list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
|
|
unregister_netdev(cpriv->dev);
|
|
ipoib_dev_cleanup(cpriv->dev);
|
|
free_netdev(cpriv->dev);
|
|
}
|
|
|
|
ipoib_ib_dev_cleanup(dev);
|
|
|
|
kfree(priv->rx_ring);
|
|
vfree(priv->tx_ring);
|
|
|
|
priv->rx_ring = NULL;
|
|
priv->tx_ring = NULL;
|
|
}
|
|
|
|
static const struct header_ops ipoib_header_ops = {
|
|
.create = ipoib_hard_header,
|
|
};
|
|
|
|
static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
|
|
void **tcph, u64 *hdr_flags, void *priv)
|
|
{
|
|
unsigned int ip_len;
|
|
struct iphdr *iph;
|
|
|
|
if (unlikely(skb->protocol != htons(ETH_P_IP)))
|
|
return -1;
|
|
|
|
/*
|
|
* In the future we may add an else clause that verifies the
|
|
* checksum and allows devices which do not calculate checksum
|
|
* to use LRO.
|
|
*/
|
|
if (unlikely(skb->ip_summed != CHECKSUM_UNNECESSARY))
|
|
return -1;
|
|
|
|
/* Check for non-TCP packet */
|
|
skb_reset_network_header(skb);
|
|
iph = ip_hdr(skb);
|
|
if (iph->protocol != IPPROTO_TCP)
|
|
return -1;
|
|
|
|
ip_len = ip_hdrlen(skb);
|
|
skb_set_transport_header(skb, ip_len);
|
|
*tcph = tcp_hdr(skb);
|
|
|
|
/* check if IP header and TCP header are complete */
|
|
if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
|
|
return -1;
|
|
|
|
*hdr_flags = LRO_IPV4 | LRO_TCP;
|
|
*iphdr = iph;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipoib_lro_setup(struct ipoib_dev_priv *priv)
|
|
{
|
|
priv->lro.lro_mgr.max_aggr = lro_max_aggr;
|
|
priv->lro.lro_mgr.max_desc = IPOIB_MAX_LRO_DESCRIPTORS;
|
|
priv->lro.lro_mgr.lro_arr = priv->lro.lro_desc;
|
|
priv->lro.lro_mgr.get_skb_header = get_skb_hdr;
|
|
priv->lro.lro_mgr.features = LRO_F_NAPI;
|
|
priv->lro.lro_mgr.dev = priv->dev;
|
|
priv->lro.lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
|
|
}
|
|
|
|
static const struct net_device_ops ipoib_netdev_ops = {
|
|
.ndo_open = ipoib_open,
|
|
.ndo_stop = ipoib_stop,
|
|
.ndo_change_mtu = ipoib_change_mtu,
|
|
.ndo_start_xmit = ipoib_start_xmit,
|
|
.ndo_tx_timeout = ipoib_timeout,
|
|
.ndo_set_multicast_list = ipoib_set_mcast_list,
|
|
.ndo_neigh_setup = ipoib_neigh_setup_dev,
|
|
};
|
|
|
|
static void ipoib_setup(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
dev->netdev_ops = &ipoib_netdev_ops;
|
|
dev->header_ops = &ipoib_header_ops;
|
|
|
|
ipoib_set_ethtool_ops(dev);
|
|
|
|
netif_napi_add(dev, &priv->napi, ipoib_poll, 100);
|
|
|
|
dev->watchdog_timeo = HZ;
|
|
|
|
dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
|
|
|
|
/*
|
|
* We add in INFINIBAND_ALEN to allow for the destination
|
|
* address "pseudoheader" for skbs without neighbour struct.
|
|
*/
|
|
dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
|
|
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);
|
|
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
|
|
|
|
memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
|
|
|
|
netif_carrier_off(dev);
|
|
|
|
priv->dev = dev;
|
|
|
|
ipoib_lro_setup(priv);
|
|
|
|
spin_lock_init(&priv->lock);
|
|
|
|
mutex_init(&priv->vlan_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->pkey_poll_task, ipoib_pkey_poll);
|
|
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);
|
|
}
|
|
|
|
struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
|
|
{
|
|
struct net_device *dev;
|
|
|
|
dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
|
|
ipoib_setup);
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
return netdev_priv(dev);
|
|
}
|
|
|
|
static ssize_t show_pkey(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
|
|
|
|
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 ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
|
|
|
|
return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
|
|
}
|
|
|
|
static ssize_t set_umcast(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
|
|
unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
|
|
|
|
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);
|
|
|
|
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 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)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Set the full membership bit, so that we join the right
|
|
* broadcast group, etc.
|
|
*/
|
|
pkey |= 0x8000;
|
|
|
|
ret = ipoib_vlan_add(to_net_dev(dev), pkey);
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
static DEVICE_ATTR(create_child, S_IWUGO, 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_IWUGO, NULL, delete_child);
|
|
|
|
int ipoib_add_pkey_attr(struct net_device *dev)
|
|
{
|
|
return device_create_file(&dev->dev, &dev_attr_pkey);
|
|
}
|
|
|
|
int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
|
|
{
|
|
struct ib_device_attr *device_attr;
|
|
int result = -ENOMEM;
|
|
|
|
device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
|
|
if (!device_attr) {
|
|
printk(KERN_WARNING "%s: allocation of %zu bytes failed\n",
|
|
hca->name, sizeof *device_attr);
|
|
return result;
|
|
}
|
|
|
|
result = ib_query_device(hca, device_attr);
|
|
if (result) {
|
|
printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n",
|
|
hca->name, result);
|
|
kfree(device_attr);
|
|
return result;
|
|
}
|
|
priv->hca_caps = device_attr->device_cap_flags;
|
|
|
|
kfree(device_attr);
|
|
|
|
if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
|
|
set_bit(IPOIB_FLAG_CSUM, &priv->flags);
|
|
priv->dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
|
|
}
|
|
|
|
if (lro)
|
|
priv->dev->features |= NETIF_F_LRO;
|
|
|
|
if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO)
|
|
priv->dev->features |= NETIF_F_TSO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct net_device *ipoib_add_port(const char *format,
|
|
struct ib_device *hca, u8 port)
|
|
{
|
|
struct ipoib_dev_priv *priv;
|
|
struct ib_port_attr attr;
|
|
int result = -ENOMEM;
|
|
|
|
priv = ipoib_intf_alloc(format);
|
|
if (!priv)
|
|
goto alloc_mem_failed;
|
|
|
|
SET_NETDEV_DEV(priv->dev, hca->dma_device);
|
|
|
|
if (!ib_query_port(hca, port, &attr))
|
|
priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
|
|
else {
|
|
printk(KERN_WARNING "%s: ib_query_port %d failed\n",
|
|
hca->name, port);
|
|
goto device_init_failed;
|
|
}
|
|
|
|
/* MTU will be reset when mcast join happens */
|
|
priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
|
|
priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu;
|
|
|
|
result = ib_query_pkey(hca, port, 0, &priv->pkey);
|
|
if (result) {
|
|
printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
|
|
hca->name, port, result);
|
|
goto device_init_failed;
|
|
}
|
|
|
|
if (ipoib_set_dev_features(priv, hca))
|
|
goto device_init_failed;
|
|
|
|
/*
|
|
* Set the full membership bit, so that we join the right
|
|
* broadcast group, etc.
|
|
*/
|
|
priv->pkey |= 0x8000;
|
|
|
|
priv->dev->broadcast[8] = priv->pkey >> 8;
|
|
priv->dev->broadcast[9] = priv->pkey & 0xff;
|
|
|
|
result = ib_query_gid(hca, port, 0, &priv->local_gid);
|
|
if (result) {
|
|
printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
|
|
hca->name, port, result);
|
|
goto device_init_failed;
|
|
} else
|
|
memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
|
|
|
|
result = ipoib_dev_init(priv->dev, hca, port);
|
|
if (result < 0) {
|
|
printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
|
|
hca->name, port, result);
|
|
goto device_init_failed;
|
|
}
|
|
|
|
INIT_IB_EVENT_HANDLER(&priv->event_handler,
|
|
priv->ca, ipoib_event);
|
|
result = ib_register_event_handler(&priv->event_handler);
|
|
if (result < 0) {
|
|
printk(KERN_WARNING "%s: ib_register_event_handler failed for "
|
|
"port %d (ret = %d)\n",
|
|
hca->name, port, result);
|
|
goto event_failed;
|
|
}
|
|
|
|
result = register_netdev(priv->dev);
|
|
if (result) {
|
|
printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
|
|
hca->name, port, result);
|
|
goto register_failed;
|
|
}
|
|
|
|
ipoib_create_debug_files(priv->dev);
|
|
|
|
if (ipoib_cm_add_mode_attr(priv->dev))
|
|
goto sysfs_failed;
|
|
if (ipoib_add_pkey_attr(priv->dev))
|
|
goto sysfs_failed;
|
|
if (ipoib_add_umcast_attr(priv->dev))
|
|
goto sysfs_failed;
|
|
if (device_create_file(&priv->dev->dev, &dev_attr_create_child))
|
|
goto sysfs_failed;
|
|
if (device_create_file(&priv->dev->dev, &dev_attr_delete_child))
|
|
goto sysfs_failed;
|
|
|
|
return priv->dev;
|
|
|
|
sysfs_failed:
|
|
ipoib_delete_debug_files(priv->dev);
|
|
unregister_netdev(priv->dev);
|
|
|
|
register_failed:
|
|
ib_unregister_event_handler(&priv->event_handler);
|
|
flush_workqueue(ipoib_workqueue);
|
|
|
|
event_failed:
|
|
ipoib_dev_cleanup(priv->dev);
|
|
|
|
device_init_failed:
|
|
free_netdev(priv->dev);
|
|
|
|
alloc_mem_failed:
|
|
return ERR_PTR(result);
|
|
}
|
|
|
|
static void ipoib_add_one(struct ib_device *device)
|
|
{
|
|
struct list_head *dev_list;
|
|
struct net_device *dev;
|
|
struct ipoib_dev_priv *priv;
|
|
int s, e, p;
|
|
|
|
if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
|
|
return;
|
|
|
|
dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
|
|
if (!dev_list)
|
|
return;
|
|
|
|
INIT_LIST_HEAD(dev_list);
|
|
|
|
if (device->node_type == RDMA_NODE_IB_SWITCH) {
|
|
s = 0;
|
|
e = 0;
|
|
} else {
|
|
s = 1;
|
|
e = device->phys_port_cnt;
|
|
}
|
|
|
|
for (p = s; p <= e; ++p) {
|
|
dev = ipoib_add_port("ib%d", device, p);
|
|
if (!IS_ERR(dev)) {
|
|
priv = netdev_priv(dev);
|
|
list_add_tail(&priv->list, dev_list);
|
|
}
|
|
}
|
|
|
|
ib_set_client_data(device, &ipoib_client, dev_list);
|
|
}
|
|
|
|
static void ipoib_remove_one(struct ib_device *device)
|
|
{
|
|
struct ipoib_dev_priv *priv, *tmp;
|
|
struct list_head *dev_list;
|
|
|
|
if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
|
|
return;
|
|
|
|
dev_list = ib_get_client_data(device, &ipoib_client);
|
|
|
|
list_for_each_entry_safe(priv, tmp, dev_list, list) {
|
|
ib_unregister_event_handler(&priv->event_handler);
|
|
|
|
rtnl_lock();
|
|
dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP);
|
|
rtnl_unlock();
|
|
|
|
flush_workqueue(ipoib_workqueue);
|
|
|
|
unregister_netdev(priv->dev);
|
|
ipoib_dev_cleanup(priv->dev);
|
|
free_netdev(priv->dev);
|
|
}
|
|
|
|
kfree(dev_list);
|
|
}
|
|
|
|
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 = max(ipoib_sendq_size, max(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);
|
|
#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);
|
|
|
|
ret = ipoib_register_debugfs();
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* We create our own workqueue mainly because we want to be
|
|
* able to flush it when devices are being removed. We can't
|
|
* use schedule_work()/flush_scheduled_work() because both
|
|
* unregister_netdev() and linkwatch_event take the rtnl lock,
|
|
* so flush_scheduled_work() can deadlock during device
|
|
* removal.
|
|
*/
|
|
ipoib_workqueue = create_singlethread_workqueue("ipoib");
|
|
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;
|
|
|
|
return 0;
|
|
|
|
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)
|
|
{
|
|
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);
|