/* * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. * Copyright (c) 2004 Voltaire, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <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 <net/dst.h> #include "ipoib.h" #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG static 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 DEFINE_MUTEX(mcast_mutex); 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; int tx_dropped = 0; ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n", mcast->mcmember.mgid.raw); spin_lock_irq(&priv->lock); list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) { /* * It's safe to call ipoib_put_ah() inside priv->lock * here, because we know that mcast->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); ipoib_neigh_free(dev, neigh); } spin_unlock_irq(&priv->lock); if (mcast->ah) ipoib_put_ah(mcast->ah); while (!skb_queue_empty(&mcast->pkt_queue)) { ++tx_dropped; dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); } netif_tx_lock_bh(dev); dev->stats.tx_dropped += tx_dropped; netif_tx_unlock_bh(dev); kfree(mcast); } static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, int can_sleep) { struct ipoib_mcast *mcast; mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); if (!mcast) return NULL; mcast->dev = dev; mcast->created = jiffies; mcast->backoff = 1; INIT_LIST_HEAD(&mcast->list); INIT_LIST_HEAD(&mcast->neigh_list); skb_queue_head_init(&mcast->pkt_queue); return mcast; } static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *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, 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); struct ipoib_ah *ah; int ret; int set_qkey = 0; 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))) { spin_lock_irq(&priv->lock); if (!priv->broadcast) { spin_unlock_irq(&priv->lock); return -EAGAIN; } priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); spin_unlock_irq(&priv->lock); priv->tx_wr.wr.ud.remote_qkey = priv->qkey; set_qkey = 1; } 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 %pI6 already attached\n", mcast->mcmember.mgid.raw); return 0; } ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), &mcast->mcmember.mgid, set_qkey); if (ret < 0) { ipoib_warn(priv, "couldn't attach QP to multicast group %pI6\n", mcast->mcmember.mgid.raw); clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); return ret; } } { struct ib_ah_attr av = { .dlid = be16_to_cpu(mcast->mcmember.mlid), .port_num = priv->port, .sl = mcast->mcmember.sl, .ah_flags = IB_AH_GRH, .static_rate = mcast->mcmember.rate, .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; ah = ipoib_create_ah(dev, priv->pd, &av); if (!ah) { ipoib_warn(priv, "ib_address_create failed\n"); } else { spin_lock_irq(&priv->lock); mcast->ah = ah; spin_unlock_irq(&priv->lock); ipoib_dbg_mcast(priv, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n", mcast->mcmember.mgid.raw, mcast->ah->ah, be16_to_cpu(mcast->mcmember.mlid), mcast->mcmember.sl); } } /* actually send any queued packets */ netif_tx_lock_bh(dev); while (!skb_queue_empty(&mcast->pkt_queue)) { struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); netif_tx_unlock_bh(dev); 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"); netif_tx_lock_bh(dev); } netif_tx_unlock_bh(dev); return 0; } static int ipoib_mcast_sendonly_join_complete(int status, struct ib_sa_multicast *multicast) { struct ipoib_mcast *mcast = multicast->context; struct net_device *dev = mcast->dev; /* We trap for port events ourselves. */ if (status == -ENETRESET) return 0; if (!status) status = ipoib_mcast_join_finish(mcast, &multicast->rec); if (status) { if (mcast->logcount++ < 20) ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for %pI6, status %d\n", mcast->mcmember.mgid.raw, status); /* Flush out any queued packets */ netif_tx_lock_bh(dev); while (!skb_queue_empty(&mcast->pkt_queue)) { ++dev->stats.tx_dropped; dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); } netif_tx_unlock_bh(dev); /* Clear the busy flag so we try again */ status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); } return status; } 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 = cpu_to_be16(priv->pkey); mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, 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, GFP_ATOMIC, ipoib_mcast_sendonly_join_complete, mcast); if (IS_ERR(mcast->mc)) { ret = PTR_ERR(mcast->mc); clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n", ret); } else { ipoib_dbg_mcast(priv, "no multicast record for %pI6, starting join\n", mcast->mcmember.mgid.raw); } return ret; } void ipoib_mcast_carrier_on_task(struct work_struct *work) { struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, carrier_on_task); /* * Take rtnl_lock to avoid racing with ipoib_stop() and * turning the carrier back on while a device is being * removed. */ rtnl_lock(); netif_carrier_on(priv->dev); rtnl_unlock(); } static int ipoib_mcast_join_complete(int status, struct ib_sa_multicast *multicast) { struct ipoib_mcast *mcast = multicast->context; struct net_device *dev = mcast->dev; struct ipoib_dev_priv *priv = netdev_priv(dev); ipoib_dbg_mcast(priv, "join completion for %pI6 (status %d)\n", mcast->mcmember.mgid.raw, status); /* We trap for port events ourselves. */ if (status == -ENETRESET) return 0; if (!status) status = ipoib_mcast_join_finish(mcast, &multicast->rec); if (!status) { mcast->backoff = 1; mutex_lock(&mcast_mutex); if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0); mutex_unlock(&mcast_mutex); /* * Defer carrier on work to ipoib_workqueue to avoid a * deadlock on rtnl_lock here. */ if (mcast == priv->broadcast) queue_work(ipoib_workqueue, &priv->carrier_on_task); return 0; } if (mcast->logcount++ < 20) { if (status == -ETIMEDOUT || status == -EAGAIN) { ipoib_dbg_mcast(priv, "multicast join failed for %pI6, status %d\n", mcast->mcmember.mgid.raw, status); } else { ipoib_warn(priv, "multicast join failed for %pI6, status %d\n", mcast->mcmember.mgid.raw, status); } } mcast->backoff *= 2; if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; /* Clear the busy flag so we try again */ status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); mutex_lock(&mcast_mutex); spin_lock_irq(&priv->lock); if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) queue_delayed_work(ipoib_workqueue, &priv->mcast_task, mcast->backoff * HZ); spin_unlock_irq(&priv->lock); mutex_unlock(&mcast_mutex); return status; } 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 %pI6\n", mcast->mcmember.mgid.raw); rec.mgid = mcast->mcmember.mgid; rec.port_gid = priv->local_gid; rec.pkey = cpu_to_be16(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_MTU_SELECTOR | IB_SA_MCMEMBER_REC_MTU | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS | IB_SA_MCMEMBER_REC_RATE_SELECTOR | IB_SA_MCMEMBER_REC_RATE | IB_SA_MCMEMBER_REC_SL | IB_SA_MCMEMBER_REC_FLOW_LABEL | IB_SA_MCMEMBER_REC_HOP_LIMIT; 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; if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) return; 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 %pI6\n", mcast->mcmember.mgid.raw); /* 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 %pI6\n", 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 %pI6\n", mgid.raw); continue; } /* Not found or send-only group, let's add a new entry */ ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n", mgid.raw); 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 %pI6\n", mcast->mcmember.mgid.raw); 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 */