mirror of https://gitee.com/openkylin/linux.git
947 lines
25 KiB
C
947 lines
25 KiB
C
/*
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* Copyright (c) 2004, 2005 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 <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <linux/ip.h>
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#include <linux/in.h>
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#include <linux/igmp.h>
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#include <linux/inetdevice.h>
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#include <linux/delay.h>
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#include <linux/completion.h>
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#include <net/dst.h>
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#include "ipoib.h"
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#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
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static int mcast_debug_level;
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module_param(mcast_debug_level, int, 0644);
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MODULE_PARM_DESC(mcast_debug_level,
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"Enable multicast debug tracing if > 0");
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#endif
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static DEFINE_MUTEX(mcast_mutex);
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struct ipoib_mcast_iter {
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struct net_device *dev;
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union ib_gid mgid;
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unsigned long created;
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unsigned int queuelen;
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unsigned int complete;
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unsigned int send_only;
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};
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static void ipoib_mcast_free(struct ipoib_mcast *mcast)
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{
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struct net_device *dev = mcast->dev;
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ipoib_neigh *neigh, *tmp;
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int tx_dropped = 0;
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ipoib_dbg_mcast(netdev_priv(dev),
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"deleting multicast group " IPOIB_GID_FMT "\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid));
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spin_lock_irq(&priv->lock);
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list_for_each_entry_safe(neigh, tmp, &mcast->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 mcast->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_irq(&priv->lock);
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if (mcast->ah)
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ipoib_put_ah(mcast->ah);
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while (!skb_queue_empty(&mcast->pkt_queue)) {
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++tx_dropped;
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dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
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}
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netif_tx_lock_bh(dev);
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dev->stats.tx_dropped += tx_dropped;
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netif_tx_unlock_bh(dev);
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kfree(mcast);
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}
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static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
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int can_sleep)
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{
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struct ipoib_mcast *mcast;
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mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
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if (!mcast)
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return NULL;
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mcast->dev = dev;
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mcast->created = jiffies;
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mcast->backoff = 1;
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INIT_LIST_HEAD(&mcast->list);
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INIT_LIST_HEAD(&mcast->neigh_list);
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skb_queue_head_init(&mcast->pkt_queue);
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return mcast;
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}
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static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid)
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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->multicast_tree.rb_node;
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while (n) {
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struct ipoib_mcast *mcast;
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int ret;
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mcast = rb_entry(n, struct ipoib_mcast, rb_node);
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ret = memcmp(mgid, mcast->mcmember.mgid.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 mcast;
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}
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return NULL;
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}
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static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast)
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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->multicast_tree.rb_node, *pn = NULL;
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while (*n) {
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struct ipoib_mcast *tmcast;
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int ret;
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pn = *n;
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tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
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ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.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(&mcast->rb_node, pn, n);
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rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
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return 0;
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}
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static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
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struct ib_sa_mcmember_rec *mcmember)
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{
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struct net_device *dev = mcast->dev;
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ipoib_ah *ah;
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int ret;
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int set_qkey = 0;
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mcast->mcmember = *mcmember;
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/* Set the cached Q_Key before we attach if it's the broadcast group */
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if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
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sizeof (union ib_gid))) {
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spin_lock_irq(&priv->lock);
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if (!priv->broadcast) {
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spin_unlock_irq(&priv->lock);
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return -EAGAIN;
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}
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priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
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spin_unlock_irq(&priv->lock);
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priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
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set_qkey = 1;
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}
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if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
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if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
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ipoib_warn(priv, "multicast group " IPOIB_GID_FMT
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" already attached\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid));
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return 0;
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}
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ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
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&mcast->mcmember.mgid, set_qkey);
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if (ret < 0) {
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ipoib_warn(priv, "couldn't attach QP to multicast group "
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IPOIB_GID_FMT "\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid));
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clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
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return ret;
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}
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}
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{
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struct ib_ah_attr av = {
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.dlid = be16_to_cpu(mcast->mcmember.mlid),
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.port_num = priv->port,
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.sl = mcast->mcmember.sl,
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.ah_flags = IB_AH_GRH,
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.static_rate = mcast->mcmember.rate,
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.grh = {
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.flow_label = be32_to_cpu(mcast->mcmember.flow_label),
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.hop_limit = mcast->mcmember.hop_limit,
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.sgid_index = 0,
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.traffic_class = mcast->mcmember.traffic_class
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}
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};
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av.grh.dgid = mcast->mcmember.mgid;
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ah = ipoib_create_ah(dev, priv->pd, &av);
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if (!ah) {
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ipoib_warn(priv, "ib_address_create failed\n");
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} else {
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spin_lock_irq(&priv->lock);
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mcast->ah = ah;
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spin_unlock_irq(&priv->lock);
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ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT
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" AV %p, LID 0x%04x, SL %d\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid),
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mcast->ah->ah,
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be16_to_cpu(mcast->mcmember.mlid),
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mcast->mcmember.sl);
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}
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}
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/* actually send any queued packets */
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netif_tx_lock_bh(dev);
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while (!skb_queue_empty(&mcast->pkt_queue)) {
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struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
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netif_tx_unlock_bh(dev);
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skb->dev = dev;
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if (!skb->dst || !skb->dst->neighbour) {
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/* put pseudoheader back on for next time */
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skb_push(skb, sizeof (struct ipoib_pseudoheader));
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}
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if (dev_queue_xmit(skb))
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ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
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netif_tx_lock_bh(dev);
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}
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netif_tx_unlock_bh(dev);
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return 0;
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}
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static int
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ipoib_mcast_sendonly_join_complete(int status,
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struct ib_sa_multicast *multicast)
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{
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struct ipoib_mcast *mcast = multicast->context;
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struct net_device *dev = mcast->dev;
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/* We trap for port events ourselves. */
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if (status == -ENETRESET)
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return 0;
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if (!status)
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status = ipoib_mcast_join_finish(mcast, &multicast->rec);
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if (status) {
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if (mcast->logcount++ < 20)
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ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for "
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IPOIB_GID_FMT ", status %d\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid), status);
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/* Flush out any queued packets */
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netif_tx_lock_bh(dev);
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while (!skb_queue_empty(&mcast->pkt_queue)) {
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++dev->stats.tx_dropped;
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dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
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}
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netif_tx_unlock_bh(dev);
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/* Clear the busy flag so we try again */
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status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY,
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&mcast->flags);
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}
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return status;
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}
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static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
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{
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struct net_device *dev = mcast->dev;
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ib_sa_mcmember_rec rec = {
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#if 0 /* Some SMs don't support send-only yet */
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.join_state = 4
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#else
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.join_state = 1
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#endif
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};
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int ret = 0;
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if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
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ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
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return -ENODEV;
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}
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if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
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ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
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return -EBUSY;
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}
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rec.mgid = mcast->mcmember.mgid;
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rec.port_gid = priv->local_gid;
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rec.pkey = cpu_to_be16(priv->pkey);
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mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca,
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priv->port, &rec,
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IB_SA_MCMEMBER_REC_MGID |
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IB_SA_MCMEMBER_REC_PORT_GID |
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IB_SA_MCMEMBER_REC_PKEY |
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IB_SA_MCMEMBER_REC_JOIN_STATE,
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GFP_ATOMIC,
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ipoib_mcast_sendonly_join_complete,
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mcast);
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if (IS_ERR(mcast->mc)) {
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ret = PTR_ERR(mcast->mc);
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clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
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ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n",
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ret);
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} else {
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ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT
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", starting join\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid));
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}
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return ret;
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}
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void ipoib_mcast_carrier_on_task(struct work_struct *work)
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{
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struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv,
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carrier_on_task);
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/*
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* Take rtnl_lock to avoid racing with ipoib_stop() and
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* turning the carrier back on while a device is being
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* removed.
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*/
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rtnl_lock();
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netif_carrier_on(priv->dev);
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rtnl_unlock();
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}
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static int ipoib_mcast_join_complete(int status,
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struct ib_sa_multicast *multicast)
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{
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struct ipoib_mcast *mcast = multicast->context;
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struct net_device *dev = mcast->dev;
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT
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" (status %d)\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid), status);
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/* We trap for port events ourselves. */
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if (status == -ENETRESET)
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return 0;
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if (!status)
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status = ipoib_mcast_join_finish(mcast, &multicast->rec);
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if (!status) {
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mcast->backoff = 1;
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mutex_lock(&mcast_mutex);
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if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
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queue_delayed_work(ipoib_workqueue,
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&priv->mcast_task, 0);
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mutex_unlock(&mcast_mutex);
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/*
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* Defer carrier on work to ipoib_workqueue to avoid a
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* deadlock on rtnl_lock here.
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*/
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if (mcast == priv->broadcast)
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queue_work(ipoib_workqueue, &priv->carrier_on_task);
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return 0;
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}
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if (mcast->logcount++ < 20) {
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if (status == -ETIMEDOUT) {
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ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT
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", status %d\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid),
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status);
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} else {
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ipoib_warn(priv, "multicast join failed for "
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IPOIB_GID_FMT ", status %d\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid),
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status);
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}
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}
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mcast->backoff *= 2;
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if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
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mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
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/* Clear the busy flag so we try again */
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status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
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mutex_lock(&mcast_mutex);
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spin_lock_irq(&priv->lock);
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if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
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queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
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mcast->backoff * HZ);
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spin_unlock_irq(&priv->lock);
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mutex_unlock(&mcast_mutex);
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return status;
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}
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static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
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int create)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ib_sa_mcmember_rec rec = {
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.join_state = 1
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};
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ib_sa_comp_mask comp_mask;
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int ret = 0;
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ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n",
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IPOIB_GID_ARG(mcast->mcmember.mgid));
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rec.mgid = mcast->mcmember.mgid;
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rec.port_gid = priv->local_gid;
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rec.pkey = cpu_to_be16(priv->pkey);
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comp_mask =
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IB_SA_MCMEMBER_REC_MGID |
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IB_SA_MCMEMBER_REC_PORT_GID |
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IB_SA_MCMEMBER_REC_PKEY |
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IB_SA_MCMEMBER_REC_JOIN_STATE;
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if (create) {
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comp_mask |=
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IB_SA_MCMEMBER_REC_QKEY |
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IB_SA_MCMEMBER_REC_MTU_SELECTOR |
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IB_SA_MCMEMBER_REC_MTU |
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IB_SA_MCMEMBER_REC_TRAFFIC_CLASS |
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IB_SA_MCMEMBER_REC_RATE_SELECTOR |
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IB_SA_MCMEMBER_REC_RATE |
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IB_SA_MCMEMBER_REC_SL |
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IB_SA_MCMEMBER_REC_FLOW_LABEL |
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IB_SA_MCMEMBER_REC_HOP_LIMIT;
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|
|
rec.qkey = priv->broadcast->mcmember.qkey;
|
|
rec.mtu_selector = IB_SA_EQ;
|
|
rec.mtu = priv->broadcast->mcmember.mtu;
|
|
rec.traffic_class = priv->broadcast->mcmember.traffic_class;
|
|
rec.rate_selector = IB_SA_EQ;
|
|
rec.rate = priv->broadcast->mcmember.rate;
|
|
rec.sl = priv->broadcast->mcmember.sl;
|
|
rec.flow_label = priv->broadcast->mcmember.flow_label;
|
|
rec.hop_limit = priv->broadcast->mcmember.hop_limit;
|
|
}
|
|
|
|
set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
|
|
mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port,
|
|
&rec, comp_mask, GFP_KERNEL,
|
|
ipoib_mcast_join_complete, mcast);
|
|
if (IS_ERR(mcast->mc)) {
|
|
clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
|
|
ret = PTR_ERR(mcast->mc);
|
|
ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret);
|
|
|
|
mcast->backoff *= 2;
|
|
if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
|
|
mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
|
|
|
|
mutex_lock(&mcast_mutex);
|
|
if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
|
|
queue_delayed_work(ipoib_workqueue,
|
|
&priv->mcast_task,
|
|
mcast->backoff * HZ);
|
|
mutex_unlock(&mcast_mutex);
|
|
}
|
|
}
|
|
|
|
void ipoib_mcast_join_task(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, mcast_task.work);
|
|
struct net_device *dev = priv->dev;
|
|
|
|
if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
|
|
return;
|
|
|
|
if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
|
|
ipoib_warn(priv, "ib_query_gid() failed\n");
|
|
else
|
|
memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
|
|
|
|
{
|
|
struct ib_port_attr attr;
|
|
|
|
if (!ib_query_port(priv->ca, priv->port, &attr))
|
|
priv->local_lid = attr.lid;
|
|
else
|
|
ipoib_warn(priv, "ib_query_port failed\n");
|
|
}
|
|
|
|
if (!priv->broadcast) {
|
|
struct ipoib_mcast *broadcast;
|
|
|
|
broadcast = ipoib_mcast_alloc(dev, 1);
|
|
if (!broadcast) {
|
|
ipoib_warn(priv, "failed to allocate broadcast group\n");
|
|
mutex_lock(&mcast_mutex);
|
|
if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
|
|
queue_delayed_work(ipoib_workqueue,
|
|
&priv->mcast_task, HZ);
|
|
mutex_unlock(&mcast_mutex);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
|
|
sizeof (union ib_gid));
|
|
priv->broadcast = broadcast;
|
|
|
|
__ipoib_mcast_add(dev, priv->broadcast);
|
|
spin_unlock_irq(&priv->lock);
|
|
}
|
|
|
|
if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
|
|
if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags))
|
|
ipoib_mcast_join(dev, priv->broadcast, 0);
|
|
return;
|
|
}
|
|
|
|
while (1) {
|
|
struct ipoib_mcast *mcast = NULL;
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
list_for_each_entry(mcast, &priv->multicast_list, list) {
|
|
if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
|
|
&& !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
|
|
&& !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
|
|
/* Found the next unjoined group */
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
if (&mcast->list == &priv->multicast_list) {
|
|
/* All done */
|
|
break;
|
|
}
|
|
|
|
ipoib_mcast_join(dev, mcast, 1);
|
|
return;
|
|
}
|
|
|
|
priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu));
|
|
|
|
if (!ipoib_cm_admin_enabled(dev)) {
|
|
rtnl_lock();
|
|
dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu));
|
|
rtnl_unlock();
|
|
}
|
|
|
|
ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
|
|
|
|
clear_bit(IPOIB_MCAST_RUN, &priv->flags);
|
|
}
|
|
|
|
int ipoib_mcast_start_thread(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
ipoib_dbg_mcast(priv, "starting multicast thread\n");
|
|
|
|
mutex_lock(&mcast_mutex);
|
|
if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
|
|
queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0);
|
|
mutex_unlock(&mcast_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ipoib_mcast_stop_thread(struct net_device *dev, int flush)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
ipoib_dbg_mcast(priv, "stopping multicast thread\n");
|
|
|
|
mutex_lock(&mcast_mutex);
|
|
clear_bit(IPOIB_MCAST_RUN, &priv->flags);
|
|
cancel_delayed_work(&priv->mcast_task);
|
|
mutex_unlock(&mcast_mutex);
|
|
|
|
if (flush)
|
|
flush_workqueue(ipoib_workqueue);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
int ret = 0;
|
|
|
|
if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
|
|
ib_sa_free_multicast(mcast->mc);
|
|
|
|
if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
|
|
ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n",
|
|
IPOIB_GID_ARG(mcast->mcmember.mgid));
|
|
|
|
/* Remove ourselves from the multicast group */
|
|
ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid,
|
|
be16_to_cpu(mcast->mcmember.mlid));
|
|
if (ret)
|
|
ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ipoib_mcast *mcast;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) ||
|
|
!priv->broadcast ||
|
|
!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
goto unlock;
|
|
}
|
|
|
|
mcast = __ipoib_mcast_find(dev, mgid);
|
|
if (!mcast) {
|
|
/* Let's create a new send only group now */
|
|
ipoib_dbg_mcast(priv, "setting up send only multicast group for "
|
|
IPOIB_GID_FMT "\n", IPOIB_GID_RAW_ARG(mgid));
|
|
|
|
mcast = ipoib_mcast_alloc(dev, 0);
|
|
if (!mcast) {
|
|
ipoib_warn(priv, "unable to allocate memory for "
|
|
"multicast structure\n");
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
goto out;
|
|
}
|
|
|
|
set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
|
|
memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid));
|
|
__ipoib_mcast_add(dev, mcast);
|
|
list_add_tail(&mcast->list, &priv->multicast_list);
|
|
}
|
|
|
|
if (!mcast->ah) {
|
|
if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
|
|
skb_queue_tail(&mcast->pkt_queue, skb);
|
|
else {
|
|
++dev->stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
|
|
ipoib_dbg_mcast(priv, "no address vector, "
|
|
"but multicast join already started\n");
|
|
else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
|
|
ipoib_mcast_sendonly_join(mcast);
|
|
|
|
/*
|
|
* If lookup completes between here and out:, don't
|
|
* want to send packet twice.
|
|
*/
|
|
mcast = NULL;
|
|
}
|
|
|
|
out:
|
|
if (mcast && mcast->ah) {
|
|
if (skb->dst &&
|
|
skb->dst->neighbour &&
|
|
!*to_ipoib_neigh(skb->dst->neighbour)) {
|
|
struct ipoib_neigh *neigh = ipoib_neigh_alloc(skb->dst->neighbour,
|
|
skb->dev);
|
|
|
|
if (neigh) {
|
|
kref_get(&mcast->ah->ref);
|
|
neigh->ah = mcast->ah;
|
|
list_add_tail(&neigh->list, &mcast->neigh_list);
|
|
}
|
|
}
|
|
|
|
ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
void ipoib_mcast_dev_flush(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
LIST_HEAD(remove_list);
|
|
struct ipoib_mcast *mcast, *tmcast;
|
|
unsigned long flags;
|
|
|
|
ipoib_dbg_mcast(priv, "flushing multicast list\n");
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
|
|
list_del(&mcast->list);
|
|
rb_erase(&mcast->rb_node, &priv->multicast_tree);
|
|
list_add_tail(&mcast->list, &remove_list);
|
|
}
|
|
|
|
if (priv->broadcast) {
|
|
rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
|
|
list_add_tail(&priv->broadcast->list, &remove_list);
|
|
priv->broadcast = NULL;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
|
|
ipoib_mcast_leave(dev, mcast);
|
|
ipoib_mcast_free(mcast);
|
|
}
|
|
}
|
|
|
|
void ipoib_mcast_restart_task(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, restart_task);
|
|
struct net_device *dev = priv->dev;
|
|
struct dev_mc_list *mclist;
|
|
struct ipoib_mcast *mcast, *tmcast;
|
|
LIST_HEAD(remove_list);
|
|
unsigned long flags;
|
|
struct ib_sa_mcmember_rec rec;
|
|
|
|
ipoib_dbg_mcast(priv, "restarting multicast task\n");
|
|
|
|
ipoib_mcast_stop_thread(dev, 0);
|
|
|
|
local_irq_save(flags);
|
|
netif_addr_lock(dev);
|
|
spin_lock(&priv->lock);
|
|
|
|
/*
|
|
* Unfortunately, the networking core only gives us a list of all of
|
|
* the multicast hardware addresses. We need to figure out which ones
|
|
* are new and which ones have been removed
|
|
*/
|
|
|
|
/* Clear out the found flag */
|
|
list_for_each_entry(mcast, &priv->multicast_list, list)
|
|
clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
|
|
|
|
/* Mark all of the entries that are found or don't exist */
|
|
for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
|
|
union ib_gid mgid;
|
|
|
|
memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid);
|
|
|
|
mcast = __ipoib_mcast_find(dev, &mgid);
|
|
if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
|
|
struct ipoib_mcast *nmcast;
|
|
|
|
/* ignore group which is directly joined by userspace */
|
|
if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) &&
|
|
!ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) {
|
|
ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid "
|
|
IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid));
|
|
continue;
|
|
}
|
|
|
|
/* Not found or send-only group, let's add a new entry */
|
|
ipoib_dbg_mcast(priv, "adding multicast entry for mgid "
|
|
IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid));
|
|
|
|
nmcast = ipoib_mcast_alloc(dev, 0);
|
|
if (!nmcast) {
|
|
ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
|
|
continue;
|
|
}
|
|
|
|
set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
|
|
|
|
nmcast->mcmember.mgid = mgid;
|
|
|
|
if (mcast) {
|
|
/* Destroy the send only entry */
|
|
list_move_tail(&mcast->list, &remove_list);
|
|
|
|
rb_replace_node(&mcast->rb_node,
|
|
&nmcast->rb_node,
|
|
&priv->multicast_tree);
|
|
} else
|
|
__ipoib_mcast_add(dev, nmcast);
|
|
|
|
list_add_tail(&nmcast->list, &priv->multicast_list);
|
|
}
|
|
|
|
if (mcast)
|
|
set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
|
|
}
|
|
|
|
/* Remove all of the entries don't exist anymore */
|
|
list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
|
|
if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
|
|
!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
|
|
ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n",
|
|
IPOIB_GID_ARG(mcast->mcmember.mgid));
|
|
|
|
rb_erase(&mcast->rb_node, &priv->multicast_tree);
|
|
|
|
/* Move to the remove list */
|
|
list_move_tail(&mcast->list, &remove_list);
|
|
}
|
|
}
|
|
|
|
spin_unlock(&priv->lock);
|
|
netif_addr_unlock(dev);
|
|
local_irq_restore(flags);
|
|
|
|
/* We have to cancel outside of the spinlock */
|
|
list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
|
|
ipoib_mcast_leave(mcast->dev, mcast);
|
|
ipoib_mcast_free(mcast);
|
|
}
|
|
|
|
if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
|
|
ipoib_mcast_start_thread(dev);
|
|
}
|
|
|
|
#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
|
|
|
|
struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
|
|
{
|
|
struct ipoib_mcast_iter *iter;
|
|
|
|
iter = kmalloc(sizeof *iter, GFP_KERNEL);
|
|
if (!iter)
|
|
return NULL;
|
|
|
|
iter->dev = dev;
|
|
memset(iter->mgid.raw, 0, 16);
|
|
|
|
if (ipoib_mcast_iter_next(iter)) {
|
|
kfree(iter);
|
|
return NULL;
|
|
}
|
|
|
|
return iter;
|
|
}
|
|
|
|
int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
|
|
struct rb_node *n;
|
|
struct ipoib_mcast *mcast;
|
|
int ret = 1;
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
|
|
n = rb_first(&priv->multicast_tree);
|
|
|
|
while (n) {
|
|
mcast = rb_entry(n, struct ipoib_mcast, rb_node);
|
|
|
|
if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
|
|
sizeof (union ib_gid)) < 0) {
|
|
iter->mgid = mcast->mcmember.mgid;
|
|
iter->created = mcast->created;
|
|
iter->queuelen = skb_queue_len(&mcast->pkt_queue);
|
|
iter->complete = !!mcast->ah;
|
|
iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
|
|
|
|
ret = 0;
|
|
|
|
break;
|
|
}
|
|
|
|
n = rb_next(n);
|
|
}
|
|
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
|
|
union ib_gid *mgid,
|
|
unsigned long *created,
|
|
unsigned int *queuelen,
|
|
unsigned int *complete,
|
|
unsigned int *send_only)
|
|
{
|
|
*mgid = iter->mgid;
|
|
*created = iter->created;
|
|
*queuelen = iter->queuelen;
|
|
*complete = iter->complete;
|
|
*send_only = iter->send_only;
|
|
}
|
|
|
|
#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
|