| /* |
| * 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. |
| * |
| * $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 <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); |
| |
| /* 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; |
| int tx_dropped = 0; |
| |
| 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) { |
| /* |
| * 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_irqrestore(&priv->lock, flags); |
| |
| 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)); |
| } |
| |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| priv->stats.tx_dropped += tx_dropped; |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| |
| 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; |
| |
| 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); |
| priv->tx_wr.wr.ud.remote_qkey = priv->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; |
| } |
| } |
| |
| { |
| 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 " 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 */ |
| spin_lock_irq(&priv->tx_lock); |
| while (!skb_queue_empty(&mcast->pkt_queue)) { |
| struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); |
| spin_unlock_irq(&priv->tx_lock); |
| |
| 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"); |
| spin_lock_irq(&priv->tx_lock); |
| } |
| spin_unlock_irq(&priv->tx_lock); |
| |
| 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; |
| struct ipoib_dev_priv *priv = netdev_priv(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 */ |
| spin_lock_irq(&priv->tx_lock); |
| while (!skb_queue_empty(&mcast->pkt_queue)) { |
| ++priv->stats.tx_dropped; |
| dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
| } |
| spin_unlock_irq(&priv->tx_lock); |
| |
| /* Clear the busy flag so we try again */ |
| clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
| mcast->query = NULL; |
| } |
| |
| 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 = cpu_to_be16(priv->pkey); |
| |
| init_completion(&mcast->done); |
| |
| ret = ib_sa_mcmember_rec_set(&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, |
| 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 = 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); |
| 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; |
| |
| mutex_lock(&mcast_mutex); |
| |
| spin_lock_irq(&priv->lock); |
| mcast->query = NULL; |
| |
| if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) { |
| if (status == -ETIMEDOUT) |
| queue_delayed_work(ipoib_workqueue, &priv->mcast_task, |
| 0); |
| else |
| queue_delayed_work(ipoib_workqueue, &priv->mcast_task, |
| mcast->backoff * HZ); |
| } else |
| complete(&mcast->done); |
| spin_unlock_irq(&priv->lock); |
| mutex_unlock(&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 = 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; |
| } |
| |
| init_completion(&mcast->done); |
| |
| ret = ib_sa_mcmember_rec_set(&ipoib_sa_client, 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; |
| |
| 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); |
| } else |
| mcast->query_id = ret; |
| } |
| |
| 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_gid_entry_get() 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; |
| priv->local_rate = attr.active_speed * |
| ib_width_enum_to_int(attr.active_width); |
| } 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)) { |
| 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 = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) - |
| IPOIB_ENCAP_LEN; |
| |
| if (!ipoib_cm_admin_enabled(dev)) |
| 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"); |
| |
| 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); |
| |
| spin_lock_irq(&priv->lock); |
| set_bit(IPOIB_MCAST_STARTED, &priv->flags); |
| spin_unlock_irq(&priv->lock); |
| |
| return 0; |
| } |
| |
| static void wait_for_mcast_join(struct ipoib_dev_priv *priv, |
| struct ipoib_mcast *mcast) |
| { |
| spin_lock_irq(&priv->lock); |
| if (mcast && mcast->query) { |
| ib_sa_cancel_query(mcast->query_id, mcast->query); |
| mcast->query = NULL; |
| spin_unlock_irq(&priv->lock); |
| ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n", |
| IPOIB_GID_ARG(mcast->mcmember.mgid)); |
| wait_for_completion(&mcast->done); |
| } |
| else |
| spin_unlock_irq(&priv->lock); |
| } |
| |
| int ipoib_mcast_stop_thread(struct net_device *dev, int flush) |
| { |
| struct ipoib_dev_priv *priv = netdev_priv(dev); |
| struct ipoib_mcast *mcast; |
| |
| ipoib_dbg_mcast(priv, "stopping multicast thread\n"); |
| |
| spin_lock_irq(&priv->lock); |
| clear_bit(IPOIB_MCAST_STARTED, &priv->flags); |
| spin_unlock_irq(&priv->lock); |
| |
| 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); |
| |
| wait_for_mcast_join(priv, priv->broadcast); |
| |
| list_for_each_entry(mcast, &priv->multicast_list, list) |
| wait_for_mcast_join(priv, mcast); |
| |
| return 0; |
| } |
| |
| static 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 = cpu_to_be16(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(&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, |
| 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, void *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); |
| |
| if (!test_bit(IPOIB_MCAST_STARTED, &priv->flags) || |
| !priv->broadcast || |
| !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { |
| ++priv->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"); |
| ++priv->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 { |
| ++priv->stats.tx_dropped; |
| 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 = ipoib_neigh_alloc(skb->dst->neighbour); |
| |
| 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(&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; |
| 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; |
| |
| ipoib_dbg_mcast(priv, "restarting multicast task\n"); |
| |
| ipoib_mcast_stop_thread(dev, 0); |
| |
| local_irq_save(flags); |
| netif_tx_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); |
| |
| /* 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_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_tx_unlock(dev); |
| local_irq_restore(flags); |
| |
| /* We have to cancel outside of the spinlock */ |
| list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { |
| wait_for_mcast_join(priv, mcast); |
| 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 */ |