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[PATCH][v4][20/24] Add IPoIB multicast & partition code

To: linux-kernel@xxxxxxxxxxxxxxx
Subject: [PATCH][v4][20/24] Add IPoIB multicast & partition code
From: Roland Dreier <roland@xxxxxxxxxxx>
Date: Sun, 19 Dec 2004 22:15:16 -0800
Cc: openib-general@xxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <200412192215.fZX1ZQqQD4QGkKcF@topspin.com>
Sender: netdev-bounce@xxxxxxxxxxx
Add functions for handling IPoIB multicast and multiple partitions.

Signed-off-by: Roland Dreier <roland@xxxxxxxxxxx>


--- /dev/null   1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/ulp/ipoib/ipoib_multicast.c     2004-12-19 
22:04:18.140025955 -0800
@@ -0,0 +1,981 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id: ipoib_multicast.c 1362 2004-12-18 15:56:29Z roland $
+ */
+
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/igmp.h>
+#include <linux/inetdevice.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+
+#include "ipoib.h"
+
+#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
+int mcast_debug_level;
+
+module_param(mcast_debug_level, int, 0644);
+MODULE_PARM_DESC(mcast_debug_level,
+                "Enable multicast debug tracing if > 0");
+#endif
+
+static DECLARE_MUTEX(mcast_mutex);
+
+/* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
+struct ipoib_mcast {
+       struct ib_sa_mcmember_rec mcmember;
+       struct ipoib_ah          *ah;
+
+       struct rb_node    rb_node;
+       struct list_head  list;
+       struct completion done;
+
+       int                 query_id;
+       struct ib_sa_query *query;
+
+       unsigned long created;
+       unsigned long backoff;
+
+       unsigned long flags;
+       unsigned char logcount;
+
+       struct list_head  neigh_list;
+
+       struct sk_buff_head pkt_queue;
+
+       struct net_device *dev;
+};
+
+struct ipoib_mcast_iter {
+       struct net_device *dev;
+       union ib_gid       mgid;
+       unsigned long      created;
+       unsigned int       queuelen;
+       unsigned int       complete;
+       unsigned int       send_only;
+};
+
+static void ipoib_mcast_free(struct ipoib_mcast *mcast)
+{
+       struct net_device *dev = mcast->dev;
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ipoib_neigh *neigh, *tmp;
+       unsigned long flags;
+
+       ipoib_dbg_mcast(netdev_priv(dev),
+                       "deleting multicast group " IPOIB_GID_FMT "\n",
+                       IPOIB_GID_ARG(mcast->mcmember.mgid));
+
+       spin_lock_irqsave(&priv->lock, flags);
+
+       list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) {
+               ipoib_put_ah(neigh->ah);
+               *to_ipoib_neigh(neigh->neighbour) = NULL;
+               neigh->neighbour->ops->destructor = NULL;
+               kfree(neigh);
+       }
+
+       spin_unlock_irqrestore(&priv->lock, flags);
+
+       if (mcast->ah)
+               ipoib_put_ah(mcast->ah);
+
+       while (!skb_queue_empty(&mcast->pkt_queue)) {
+               struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
+
+               skb->dev = dev;
+               dev_kfree_skb_any(skb);
+       }
+
+       kfree(mcast);
+}
+
+static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
+                                            int can_sleep)
+{
+       struct ipoib_mcast *mcast;
+
+       mcast = kmalloc(sizeof (*mcast), can_sleep ? GFP_KERNEL : GFP_ATOMIC);
+       if (!mcast)
+               return NULL;
+
+       memset(mcast, 0, sizeof (*mcast));
+
+       init_completion(&mcast->done);
+
+       mcast->dev = dev;
+       mcast->created = jiffies;
+       mcast->backoff = HZ;
+       mcast->logcount = 0;
+
+       INIT_LIST_HEAD(&mcast->list);
+       INIT_LIST_HEAD(&mcast->neigh_list);
+       skb_queue_head_init(&mcast->pkt_queue);
+
+       mcast->ah    = NULL;
+       mcast->query = NULL;
+
+       return mcast;
+}
+
+static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union 
ib_gid *mgid)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct rb_node *n = priv->multicast_tree.rb_node;
+
+       while (n) {
+               struct ipoib_mcast *mcast;
+               int ret;
+
+               mcast = rb_entry(n, struct ipoib_mcast, rb_node);
+
+               ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw,
+                            sizeof (union ib_gid));
+               if (ret < 0)
+                       n = n->rb_left;
+               else if (ret > 0)
+                       n = n->rb_right;
+               else
+                       return mcast;
+       }
+
+       return NULL;
+}
+
+static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL;
+
+       while (*n) {
+               struct ipoib_mcast *tmcast;
+               int ret;
+
+               pn = *n;
+               tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
+
+               ret = memcmp(mcast->mcmember.mgid.raw, 
tmcast->mcmember.mgid.raw,
+                            sizeof (union ib_gid));
+               if (ret < 0)
+                       n = &pn->rb_left;
+               else if (ret > 0)
+                       n = &pn->rb_right;
+               else
+                       return -EEXIST;
+       }
+
+       rb_link_node(&mcast->rb_node, pn, n);
+       rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
+
+       return 0;
+}
+
+static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
+                                  struct ib_sa_mcmember_rec *mcmember)
+{
+       struct net_device *dev = mcast->dev;
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       int ret;
+
+       mcast->mcmember = *mcmember;
+
+       /* Set the cached Q_Key before we attach if it's the broadcast group */
+       if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
+                   sizeof (union ib_gid)))
+               priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
+
+       if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
+               if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) 
{
+                       ipoib_warn(priv, "multicast group " IPOIB_GID_FMT
+                                  " already attached\n",
+                                  IPOIB_GID_ARG(mcast->mcmember.mgid));
+
+                       return 0;
+               }
+
+               ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
+                                        &mcast->mcmember.mgid);
+               if (ret < 0) {
+                       ipoib_warn(priv, "couldn't attach QP to multicast group 
"
+                                  IPOIB_GID_FMT "\n",
+                                  IPOIB_GID_ARG(mcast->mcmember.mgid));
+
+                       clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
+                       return ret;
+               }
+       }
+
+       {
+               /*
+                * For now we set static_rate to 0.  This is not
+                * really correct: we should look at the rate
+                * component of the MC member record, compare it with
+                * the rate of our local port (calculated from the
+                * active link speed and link width) and set an
+                * inter-packet delay appropriately.
+                */
+               struct ib_ah_attr av = {
+                       .dlid          = be16_to_cpu(mcast->mcmember.mlid),
+                       .port_num      = priv->port,
+                       .sl            = mcast->mcmember.sl,
+                       .static_rate   = 0,
+                       .ah_flags      = IB_AH_GRH,
+                       .grh           = {
+                               .flow_label    = 
be32_to_cpu(mcast->mcmember.flow_label),
+                               .hop_limit     = mcast->mcmember.hop_limit,
+                               .sgid_index    = 0,
+                               .traffic_class = mcast->mcmember.traffic_class
+                       }
+               };
+
+               av.grh.dgid = mcast->mcmember.mgid;
+
+               mcast->ah = ipoib_create_ah(dev, priv->pd, &av);
+               if (!mcast->ah) {
+                       ipoib_warn(priv, "ib_address_create failed\n");
+               } else {
+                       ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT
+                                       " AV %p, LID 0x%04x, SL %d\n",
+                                       IPOIB_GID_ARG(mcast->mcmember.mgid),
+                                       mcast->ah->ah,
+                                       be16_to_cpu(mcast->mcmember.mlid),
+                                       mcast->mcmember.sl);
+               }
+       }
+
+       /* actually send any queued packets */
+       while (!skb_queue_empty(&mcast->pkt_queue)) {
+               struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
+
+               skb->dev = dev;
+
+               if (!skb->dst || !skb->dst->neighbour) {
+                       /* put pseudoheader back on for next time */
+                       skb_push(skb, sizeof (struct ipoib_pseudoheader));
+               }
+
+               if (dev_queue_xmit(skb))
+                       ipoib_warn(priv, "dev_queue_xmit failed to requeue 
packet\n");
+       }
+
+       return 0;
+}
+
+static void
+ipoib_mcast_sendonly_join_complete(int status,
+                                  struct ib_sa_mcmember_rec *mcmember,
+                                  void *mcast_ptr)
+{
+       struct ipoib_mcast *mcast = mcast_ptr;
+       struct net_device *dev = mcast->dev;
+
+       if (!status)
+               ipoib_mcast_join_finish(mcast, mcmember);
+       else {
+               if (mcast->logcount++ < 20)
+                       ipoib_dbg_mcast(netdev_priv(dev), "multicast join 
failed for "
+                                       IPOIB_GID_FMT ", status %d\n",
+                                       IPOIB_GID_ARG(mcast->mcmember.mgid), 
status);
+
+               /* Flush out any queued packets */
+               while (!skb_queue_empty(&mcast->pkt_queue)) {
+                       struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
+
+                       skb->dev = dev;
+
+                       dev_kfree_skb_any(skb);
+               }
+
+               /* Clear the busy flag so we try again */
+               clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
+       }
+
+       complete(&mcast->done);
+}
+
+static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
+{
+       struct net_device *dev = mcast->dev;
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ib_sa_mcmember_rec rec = {
+#if 0                          /* Some SMs don't support send-only yet */
+               .join_state = 4
+#else
+               .join_state = 1
+#endif
+       };
+       int ret = 0;
+
+       if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
+               ipoib_dbg_mcast(priv, "device shutting down, no multicast 
joins\n");
+               return -ENODEV;
+       }
+
+       if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
+               ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
+               return -EBUSY;
+       }
+
+       rec.mgid     = mcast->mcmember.mgid;
+       rec.port_gid = priv->local_gid;
+       rec.pkey     = be16_to_cpu(priv->pkey);
+
+       ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec,
+                                    IB_SA_MCMEMBER_REC_MGID            |
+                                    IB_SA_MCMEMBER_REC_PORT_GID        |
+                                    IB_SA_MCMEMBER_REC_PKEY            |
+                                    IB_SA_MCMEMBER_REC_JOIN_STATE,
+                                    1000, GFP_ATOMIC,
+                                    ipoib_mcast_sendonly_join_complete,
+                                    mcast, &mcast->query);
+       if (ret < 0) {
+               ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n",
+                          ret);
+       } else {
+               ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT
+                               ", starting join\n",
+                               IPOIB_GID_ARG(mcast->mcmember.mgid));
+
+               mcast->query_id = ret;
+       }
+
+       return ret;
+}
+
+static void ipoib_mcast_join_complete(int status,
+                                     struct ib_sa_mcmember_rec *mcmember,
+                                     void *mcast_ptr)
+{
+       struct ipoib_mcast *mcast = mcast_ptr;
+       struct net_device *dev = mcast->dev;
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+       ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT
+                       " (status %d)\n",
+                       IPOIB_GID_ARG(mcast->mcmember.mgid), status);
+
+       if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) {
+               mcast->backoff = HZ;
+               down(&mcast_mutex);
+               if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
+                       queue_work(ipoib_workqueue, &priv->mcast_task);
+               up(&mcast_mutex);
+               complete(&mcast->done);
+               return;
+       }
+
+       if (status == -EINTR) {
+               complete(&mcast->done);
+               return;
+       }
+
+       if (status && mcast->logcount++ < 20) {
+               if (status == -ETIMEDOUT || status == -EINTR) {
+                       ipoib_dbg_mcast(priv, "multicast join failed for " 
IPOIB_GID_FMT
+                                       ", status %d\n",
+                                       IPOIB_GID_ARG(mcast->mcmember.mgid),
+                                       status);
+               } else {
+                       ipoib_warn(priv, "multicast join failed for "
+                                  IPOIB_GID_FMT ", status %d\n",
+                                  IPOIB_GID_ARG(mcast->mcmember.mgid),
+                                  status);
+               }
+       }
+
+       mcast->backoff *= 2;
+       if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
+               mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
+
+       mcast->query = NULL;
+
+       down(&mcast_mutex);
+       if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) {
+               if (status == -ETIMEDOUT)
+                       queue_work(ipoib_workqueue, &priv->mcast_task);
+               else
+                       queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
+                                          mcast->backoff * HZ);
+       } else
+               complete(&mcast->done);
+       up(&mcast_mutex);
+
+       return;
+}
+
+static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
+                            int create)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ib_sa_mcmember_rec rec = {
+               .join_state = 1
+       };
+       ib_sa_comp_mask comp_mask;
+       int ret = 0;
+
+       ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n",
+                       IPOIB_GID_ARG(mcast->mcmember.mgid));
+
+       rec.mgid     = mcast->mcmember.mgid;
+       rec.port_gid = priv->local_gid;
+       rec.pkey     = be16_to_cpu(priv->pkey);
+
+       comp_mask =
+               IB_SA_MCMEMBER_REC_MGID         |
+               IB_SA_MCMEMBER_REC_PORT_GID     |
+               IB_SA_MCMEMBER_REC_PKEY         |
+               IB_SA_MCMEMBER_REC_JOIN_STATE;
+
+       if (create) {
+               comp_mask |=
+                       IB_SA_MCMEMBER_REC_QKEY         |
+                       IB_SA_MCMEMBER_REC_SL           |
+                       IB_SA_MCMEMBER_REC_FLOW_LABEL   |
+                       IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
+
+               rec.qkey          = priv->broadcast->mcmember.qkey;
+               rec.sl            = priv->broadcast->mcmember.sl;
+               rec.flow_label    = priv->broadcast->mcmember.flow_label;
+               rec.traffic_class = priv->broadcast->mcmember.traffic_class;
+       }
+
+       ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask,
+                                    mcast->backoff * 1000, GFP_ATOMIC,
+                                    ipoib_mcast_join_complete,
+                                    mcast, &mcast->query);
+
+       if (ret < 0) {
+               ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", 
ret);
+
+               mcast->backoff *= 2;
+               if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
+                       mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
+
+               down(&mcast_mutex);
+               if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
+                       queue_delayed_work(ipoib_workqueue,
+                                          &priv->mcast_task,
+                                          mcast->backoff);
+               up(&mcast_mutex);
+       } else
+               mcast->query_id = ret;
+}
+
+void ipoib_mcast_join_task(void *dev_ptr)
+{
+       struct net_device *dev = dev_ptr;
+       struct ipoib_dev_priv *priv = netdev_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_gid_entry_get() failed\n");
+       else
+               memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof 
(union ib_gid));
+
+       if (!priv->broadcast) {
+               priv->broadcast = ipoib_mcast_alloc(dev, 1);
+               if (!priv->broadcast) {
+                       ipoib_warn(priv, "failed to allocate broadcast 
group\n");
+                       down(&mcast_mutex);
+                       if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
+                               queue_delayed_work(ipoib_workqueue,
+                                                  &priv->mcast_task, HZ);
+                       up(&mcast_mutex);
+                       return;
+               }
+
+               memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast 
+ 4,
+                      sizeof (union ib_gid));
+
+               spin_lock_irq(&priv->lock);
+               __ipoib_mcast_add(dev, priv->broadcast);
+               spin_unlock_irq(&priv->lock);
+       }
+
+       if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &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;
+       }
+
+       {
+               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");
+       }
+
+       priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) -
+               IPOIB_ENCAP_LEN;
+       dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
+
+       ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
+
+       clear_bit(IPOIB_MCAST_RUN, &priv->flags);
+       netif_carrier_on(dev);
+}
+
+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");
+
+       down(&mcast_mutex);
+       if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
+               queue_work(ipoib_workqueue, &priv->mcast_task);
+       up(&mcast_mutex);
+
+       return 0;
+}
+
+int ipoib_mcast_stop_thread(struct net_device *dev)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ipoib_mcast *mcast;
+
+       ipoib_dbg_mcast(priv, "stopping multicast thread\n");
+
+       down(&mcast_mutex);
+       clear_bit(IPOIB_MCAST_RUN, &priv->flags);
+       cancel_delayed_work(&priv->mcast_task);
+       up(&mcast_mutex);
+
+       flush_workqueue(ipoib_workqueue);
+
+       if (priv->broadcast && priv->broadcast->query) {
+               ib_sa_cancel_query(priv->broadcast->query_id, 
priv->broadcast->query);
+               priv->broadcast->query = NULL;
+               ipoib_dbg_mcast(priv, "waiting for bcast\n");
+               wait_for_completion(&priv->broadcast->done);
+       }
+
+       list_for_each_entry(mcast, &priv->multicast_list, list) {
+               if (mcast->query) {
+                       ib_sa_cancel_query(mcast->query_id, mcast->query);
+                       mcast->query = NULL;
+                       ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT 
"\n",
+                                       IPOIB_GID_ARG(mcast->mcmember.mgid));
+                       wait_for_completion(&mcast->done);
+               }
+       }
+
+       return 0;
+}
+
+int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ib_sa_mcmember_rec rec = {
+               .join_state = 1
+       };
+       int ret = 0;
+
+       if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags))
+               return 0;
+
+       ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n",
+                       IPOIB_GID_ARG(mcast->mcmember.mgid));
+
+       rec.mgid     = mcast->mcmember.mgid;
+       rec.port_gid = priv->local_gid;
+       rec.pkey     = be16_to_cpu(priv->pkey);
+
+       /* Remove ourselves from the multicast group */
+       ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid),
+                                &mcast->mcmember.mgid);
+       if (ret)
+               ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", 
ret);
+
+       /*
+        * Just make one shot at leaving and don't wait for a reply;
+        * if we fail, too bad.
+        */
+       ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec,
+                                       IB_SA_MCMEMBER_REC_MGID         |
+                                       IB_SA_MCMEMBER_REC_PORT_GID     |
+                                       IB_SA_MCMEMBER_REC_PKEY         |
+                                       IB_SA_MCMEMBER_REC_JOIN_STATE,
+                                       0, GFP_ATOMIC, NULL,
+                                       mcast, &mcast->query);
+       if (ret < 0)
+               ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed "
+                          "for leave (result = %d)\n", ret);
+
+       return 0;
+}
+
+void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
+                     struct sk_buff *skb)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ipoib_mcast *mcast;
+
+       /*
+        * We can only be called from ipoib_start_xmit, so we're
+        * inside tx_lock -- no need to save/restore flags.
+        */
+       spin_lock(&priv->lock);
+
+       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_ARG(*mgid));
+
+               mcast = ipoib_mcast_alloc(dev, 0);
+               if (!mcast) {
+                       ipoib_warn(priv, "unable to allocate memory for "
+                                  "multicast structure\n");
+                       dev_kfree_skb_any(skb);
+                       goto out;
+               }
+
+               set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
+               mcast->mcmember.mgid = *mgid;
+               __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_kfree_skb_any(skb);
+
+               if (mcast->query)
+                       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 = kmalloc(sizeof *neigh, 
GFP_ATOMIC);
+
+                       if (neigh) {
+                               kref_get(&mcast->ah->ref);
+                               neigh->ah       = mcast->ah;
+                               neigh->neighbour = skb->dst->neighbour;
+                               *to_ipoib_neigh(skb->dst->neighbour) = neigh;
+                               list_add_tail(&neigh->list, &mcast->neigh_list);
+                       }
+               }
+
+               ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
+       }
+
+       spin_unlock(&priv->lock);
+}
+
+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, *nmcast;
+       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) {
+               nmcast = ipoib_mcast_alloc(dev, 0);
+               if (nmcast) {
+                       nmcast->flags =
+                               mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY);
+
+                       nmcast->mcmember.mgid = mcast->mcmember.mgid;
+
+                       /* Add the new group in before the to-be-destroyed 
group */
+                       list_add_tail(&nmcast->list, &mcast->list);
+                       list_del_init(&mcast->list);
+
+                       rb_replace_node(&mcast->rb_node, &nmcast->rb_node,
+                                       &priv->multicast_tree);
+
+                       list_add_tail(&mcast->list, &remove_list);
+               } else {
+                       ipoib_warn(priv, "could not reallocate multicast group "
+                                  IPOIB_GID_FMT "\n",
+                                  IPOIB_GID_ARG(mcast->mcmember.mgid));
+               }
+       }
+
+       if (priv->broadcast) {
+               nmcast = ipoib_mcast_alloc(dev, 0);
+               if (nmcast) {
+                       nmcast->mcmember.mgid = priv->broadcast->mcmember.mgid;
+
+                       rb_replace_node(&priv->broadcast->rb_node,
+                                       &nmcast->rb_node,
+                                       &priv->multicast_tree);
+
+                       list_add_tail(&priv->broadcast->list, &remove_list);
+               }
+
+               priv->broadcast = nmcast;
+       }
+
+       spin_unlock_irqrestore(&priv->lock, flags);
+
+       list_for_each_entry(mcast, &remove_list, list) {
+               ipoib_mcast_leave(dev, mcast);
+               ipoib_mcast_free(mcast);
+       }
+}
+
+void ipoib_mcast_dev_down(struct net_device *dev)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       unsigned long flags;
+
+       /* Delete broadcast since it will be recreated */
+       if (priv->broadcast) {
+               ipoib_dbg_mcast(priv, "deleting broadcast group\n");
+
+               spin_lock_irqsave(&priv->lock, flags);
+               rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
+               spin_unlock_irqrestore(&priv->lock, flags);
+               ipoib_mcast_leave(dev, priv->broadcast);
+               ipoib_mcast_free(priv->broadcast);
+               priv->broadcast = NULL;
+       }
+}
+
+void ipoib_mcast_restart_task(void *dev_ptr)
+{
+       struct net_device *dev = dev_ptr;
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct dev_mc_list *mclist;
+       struct ipoib_mcast *mcast, *tmcast;
+       LIST_HEAD(remove_list);
+       unsigned long flags;
+
+       ipoib_dbg_mcast(priv, "restarting multicast task\n");
+
+       ipoib_mcast_stop_thread(dev);
+
+       spin_lock_irqsave(&priv->lock, flags);
+
+       /*
+        * 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);
+
+               /* Add in the P_Key */
+               mgid.raw[4] = (priv->pkey >> 8) & 0xff;
+               mgid.raw[5] = priv->pkey & 0xff;
+
+               mcast = __ipoib_mcast_find(dev, &mgid);
+               if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, 
&mcast->flags)) {
+                       struct ipoib_mcast *nmcast;
+
+                       /* 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_del(&mcast->list);
+                               list_add_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_del(&mcast->list);
+                       list_add_tail(&mcast->list, &remove_list);
+               }
+       }
+       spin_unlock_irqrestore(&priv->lock, flags);
+
+       /* We have to cancel outside of the spinlock */
+       list_for_each_entry(mcast, &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);
+}
+
+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, sizeof iter->mgid);
+
+       if (ipoib_mcast_iter_next(iter)) {
+               ipoib_mcast_iter_free(iter);
+               return NULL;
+       }
+
+       return iter;
+}
+
+void ipoib_mcast_iter_free(struct ipoib_mcast_iter *iter)
+{
+       kfree(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;
+}
--- /dev/null   1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/ulp/ipoib/ipoib_vlan.c  2004-12-19 
22:04:18.168021829 -0800
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id: ipoib_vlan.c 1349 2004-12-16 21:09:43Z roland $
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+
+#include <asm/uaccess.h>
+
+#include "ipoib.h"
+
+static ssize_t show_parent(struct class_device *class_dev, char *buf)
+{
+       struct net_device *dev =
+               container_of(class_dev, struct net_device, class_dev);
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+       return sprintf(buf, "%s\n", priv->parent->name);
+}
+static CLASS_DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
+
+int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
+{
+       struct ipoib_dev_priv *ppriv, *priv;
+       char intf_name[IFNAMSIZ];
+       int result;
+
+       if (!capable(CAP_NET_ADMIN))
+               return -EPERM;
+
+       ppriv = netdev_priv(pdev);
+
+       down(&ppriv->vlan_mutex);
+
+       /*
+        * First ensure this isn't a duplicate. We check the parent device and
+        * then all of the child interfaces to make sure the Pkey doesn't match.
+        */
+       if (ppriv->pkey == pkey) {
+               result = -ENOTUNIQ;
+               goto err;
+       }
+
+       list_for_each_entry(priv, &ppriv->child_intfs, list) {
+               if (priv->pkey == pkey) {
+                       result = -ENOTUNIQ;
+                       goto err;
+               }
+       }
+
+       snprintf(intf_name, sizeof intf_name, "%s.%04x",
+                ppriv->dev->name, pkey);
+       priv = ipoib_intf_alloc(intf_name);
+       if (!priv) {
+               result = -ENOMEM;
+               goto err;
+       }
+
+       set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
+
+       priv->pkey = pkey;
+
+       memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
+       priv->dev->broadcast[8] = pkey >> 8;
+       priv->dev->broadcast[9] = pkey & 0xff;
+
+       result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
+       if (result < 0) {
+               ipoib_warn(ppriv, "failed to initialize subinterface: "
+                          "device %s, port %d",
+                          ppriv->ca->name, ppriv->port);
+               goto device_init_failed;
+       }
+
+       result = register_netdev(priv->dev);
+       if (result) {
+               ipoib_warn(priv, "failed to initialize; error %i", result);
+               goto register_failed;
+       }
+
+       priv->parent = ppriv->dev;
+
+       if (ipoib_create_debug_file(priv->dev))
+               goto debug_failed;
+
+       if (ipoib_add_pkey_attr(priv->dev))
+               goto sysfs_failed;
+
+       if (class_device_create_file(&priv->dev->class_dev,
+                                    &class_device_attr_parent))
+               goto sysfs_failed;
+
+       list_add_tail(&priv->list, &ppriv->child_intfs);
+
+       up(&ppriv->vlan_mutex);
+
+       return 0;
+
+sysfs_failed:
+       ipoib_delete_debug_file(priv->dev);
+
+debug_failed:
+       unregister_netdev(priv->dev);
+
+register_failed:
+       ipoib_dev_cleanup(priv->dev);
+
+device_init_failed:
+       free_netdev(priv->dev);
+
+err:
+       up(&ppriv->vlan_mutex);
+       return result;
+}
+
+int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
+{
+       struct ipoib_dev_priv *ppriv, *priv, *tpriv;
+       int ret = -ENOENT;
+
+       if (!capable(CAP_NET_ADMIN))
+               return -EPERM;
+
+       ppriv = netdev_priv(pdev);
+
+       down(&ppriv->vlan_mutex);
+       list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
+               if (priv->pkey == pkey) {
+                       unregister_netdev(priv->dev);
+                       ipoib_dev_cleanup(priv->dev);
+
+                       list_del(&priv->list);
+
+                       kfree(priv);
+
+                       ret = 0;
+                       break;
+               }
+       }
+       up(&ppriv->vlan_mutex);
+
+       return ret;
+}


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