diff options
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_multicast.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 991 |
1 files changed, 991 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c new file mode 100644 index 00000000000..f46932dc81c --- /dev/null +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -0,0 +1,991 @@ +/* + * Copyright (c) 2004, 2005 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 +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 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; + LIST_HEAD(ah_list); + struct ipoib_ah *ah, *tah; + + 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) { + if (neigh->ah) + list_add_tail(&neigh->ah->list, &ah_list); + *to_ipoib_neigh(neigh->neighbour) = NULL; + neigh->neighbour->ops->destructor = NULL; + kfree(neigh); + } + + spin_unlock_irqrestore(&priv->lock, flags); + + list_for_each_entry_safe(ah, tah, &ah_list, list) + ipoib_put_ah(ah); + + 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); + 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, + .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; + + if (ib_sa_rate_enum_to_int(mcast->mcmember.rate) > 0) + av.static_rate = (2 * priv->local_rate - + ib_sa_rate_enum_to_int(mcast->mcmember.rate) - 1) / + (priv->local_rate ? priv->local_rate : 1); + + ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n", + av.static_rate, priv->local_rate, + ib_sa_rate_enum_to_int(mcast->mcmember.rate)); + + 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)); + + { + 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) { + 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; + } + + 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; +} + +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 = 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_safe(mcast, tmcast, &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_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); +} + +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; +} |