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1051 lines
29 KiB
1051 lines
29 KiB
/* |
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* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. |
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
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* Copyright (c) 2004 Voltaire, Inc. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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|
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#include <linux/skbuff.h> |
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#include <linux/rtnetlink.h> |
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#include <linux/moduleparam.h> |
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#include <linux/ip.h> |
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#include <linux/in.h> |
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#include <linux/igmp.h> |
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#include <linux/inetdevice.h> |
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#include <linux/delay.h> |
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#include <linux/completion.h> |
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#include <linux/slab.h> |
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|
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#include <net/dst.h> |
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|
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#include "ipoib.h" |
|
|
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#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
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static int mcast_debug_level; |
|
|
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module_param(mcast_debug_level, int, 0644); |
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MODULE_PARM_DESC(mcast_debug_level, |
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"Enable multicast debug tracing if > 0"); |
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#endif |
|
|
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struct ipoib_mcast_iter { |
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struct net_device *dev; |
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union ib_gid mgid; |
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unsigned long created; |
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unsigned int queuelen; |
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unsigned int complete; |
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unsigned int send_only; |
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}; |
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|
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/* join state that allows creating mcg with sendonly member request */ |
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#define SENDONLY_FULLMEMBER_JOIN 8 |
|
|
|
/* |
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* This should be called with the priv->lock held |
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*/ |
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static void __ipoib_mcast_schedule_join_thread(struct ipoib_dev_priv *priv, |
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struct ipoib_mcast *mcast, |
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bool delay) |
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{ |
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if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
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return; |
|
|
|
/* |
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* We will be scheduling *something*, so cancel whatever is |
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* currently scheduled first |
|
*/ |
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cancel_delayed_work(&priv->mcast_task); |
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if (mcast && delay) { |
|
/* |
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* We had a failure and want to schedule a retry later |
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*/ |
|
mcast->backoff *= 2; |
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if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) |
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mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; |
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mcast->delay_until = jiffies + (mcast->backoff * HZ); |
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/* |
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* Mark this mcast for its delay, but restart the |
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* task immediately. The join task will make sure to |
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* clear out all entries without delays, and then |
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* schedule itself to run again when the earliest |
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* delay expires |
|
*/ |
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queue_delayed_work(priv->wq, &priv->mcast_task, 0); |
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} else if (delay) { |
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/* |
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* Special case of retrying after a failure to |
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* allocate the broadcast multicast group, wait |
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* 1 second and try again |
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*/ |
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queue_delayed_work(priv->wq, &priv->mcast_task, HZ); |
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} else |
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queue_delayed_work(priv->wq, &priv->mcast_task, 0); |
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} |
|
|
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static void ipoib_mcast_free(struct ipoib_mcast *mcast) |
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{ |
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struct net_device *dev = mcast->dev; |
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int tx_dropped = 0; |
|
|
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ipoib_dbg_mcast(ipoib_priv(dev), "deleting multicast group %pI6\n", |
|
mcast->mcmember.mgid.raw); |
|
|
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/* remove all neigh connected to this mcast */ |
|
ipoib_del_neighs_by_gid(dev, mcast->mcmember.mgid.raw); |
|
|
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if (mcast->ah) |
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ipoib_put_ah(mcast->ah); |
|
|
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while (!skb_queue_empty(&mcast->pkt_queue)) { |
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++tx_dropped; |
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dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
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} |
|
|
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netif_tx_lock_bh(dev); |
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dev->stats.tx_dropped += tx_dropped; |
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netif_tx_unlock_bh(dev); |
|
|
|
kfree(mcast); |
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} |
|
|
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static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev) |
|
{ |
|
struct ipoib_mcast *mcast; |
|
|
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mcast = kzalloc(sizeof(*mcast), GFP_ATOMIC); |
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if (!mcast) |
|
return NULL; |
|
|
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mcast->dev = dev; |
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mcast->created = jiffies; |
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mcast->delay_until = jiffies; |
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mcast->backoff = 1; |
|
|
|
INIT_LIST_HEAD(&mcast->list); |
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INIT_LIST_HEAD(&mcast->neigh_list); |
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skb_queue_head_init(&mcast->pkt_queue); |
|
|
|
return mcast; |
|
} |
|
|
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static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid) |
|
{ |
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struct ipoib_dev_priv *priv = ipoib_priv(dev); |
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struct rb_node *n = priv->multicast_tree.rb_node; |
|
|
|
while (n) { |
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struct ipoib_mcast *mcast; |
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int ret; |
|
|
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mcast = rb_entry(n, struct ipoib_mcast, rb_node); |
|
|
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ret = memcmp(mgid, mcast->mcmember.mgid.raw, |
|
sizeof (union ib_gid)); |
|
if (ret < 0) |
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n = n->rb_left; |
|
else if (ret > 0) |
|
n = n->rb_right; |
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else |
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return mcast; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
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static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) |
|
{ |
|
struct ipoib_dev_priv *priv = ipoib_priv(dev); |
|
struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; |
|
|
|
while (*n) { |
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struct ipoib_mcast *tmcast; |
|
int ret; |
|
|
|
pn = *n; |
|
tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); |
|
|
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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; |
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else |
|
return -EEXIST; |
|
} |
|
|
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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 = ipoib_priv(dev); |
|
struct rdma_netdev *rn = netdev_priv(dev); |
|
struct ipoib_ah *ah; |
|
struct rdma_ah_attr av; |
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int ret; |
|
int set_qkey = 0; |
|
int mtu; |
|
|
|
mcast->mcmember = *mcmember; |
|
|
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/* Set the multicast MTU and 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; |
|
} |
|
/*update priv member according to the new mcast*/ |
|
priv->broadcast->mcmember.qkey = mcmember->qkey; |
|
priv->broadcast->mcmember.mtu = mcmember->mtu; |
|
priv->broadcast->mcmember.traffic_class = mcmember->traffic_class; |
|
priv->broadcast->mcmember.rate = mcmember->rate; |
|
priv->broadcast->mcmember.sl = mcmember->sl; |
|
priv->broadcast->mcmember.flow_label = mcmember->flow_label; |
|
priv->broadcast->mcmember.hop_limit = mcmember->hop_limit; |
|
/* assume if the admin and the mcast are the same both can be changed */ |
|
mtu = rdma_mtu_enum_to_int(priv->ca, priv->port, |
|
priv->broadcast->mcmember.mtu); |
|
if (priv->mcast_mtu == priv->admin_mtu) |
|
priv->admin_mtu = IPOIB_UD_MTU(mtu); |
|
priv->mcast_mtu = IPOIB_UD_MTU(mtu); |
|
rn->mtu = priv->mcast_mtu; |
|
|
|
priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); |
|
spin_unlock_irq(&priv->lock); |
|
priv->tx_wr.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 = rn->attach_mcast(dev, priv->ca, &mcast->mcmember.mgid, |
|
be16_to_cpu(mcast->mcmember.mlid), |
|
set_qkey, priv->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; |
|
} |
|
} |
|
|
|
memset(&av, 0, sizeof(av)); |
|
av.type = rdma_ah_find_type(priv->ca, priv->port); |
|
rdma_ah_set_dlid(&av, be16_to_cpu(mcast->mcmember.mlid)); |
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rdma_ah_set_port_num(&av, priv->port); |
|
rdma_ah_set_sl(&av, mcast->mcmember.sl); |
|
rdma_ah_set_static_rate(&av, mcast->mcmember.rate); |
|
|
|
rdma_ah_set_grh(&av, &mcast->mcmember.mgid, |
|
be32_to_cpu(mcast->mcmember.flow_label), |
|
0, mcast->mcmember.hop_limit, |
|
mcast->mcmember.traffic_class); |
|
|
|
ah = ipoib_create_ah(dev, priv->pd, &av); |
|
if (IS_ERR(ah)) { |
|
ipoib_warn(priv, "ib_address_create failed %ld\n", |
|
-PTR_ERR(ah)); |
|
/* use original error */ |
|
return PTR_ERR(ah); |
|
} |
|
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; |
|
|
|
ret = dev_queue_xmit(skb); |
|
if (ret) |
|
ipoib_warn(priv, "%s:dev_queue_xmit failed to re-queue packet, ret:%d\n", |
|
__func__, ret); |
|
netif_tx_lock_bh(dev); |
|
} |
|
netif_tx_unlock_bh(dev); |
|
|
|
return 0; |
|
} |
|
|
|
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); |
|
struct ib_port_attr attr; |
|
|
|
if (ib_query_port(priv->ca, priv->port, &attr) || |
|
attr.state != IB_PORT_ACTIVE) { |
|
ipoib_dbg(priv, "Keeping carrier off until IB port is active\n"); |
|
return; |
|
} |
|
/* |
|
* Take rtnl_lock to avoid racing with ipoib_stop() and |
|
* turning the carrier back on while a device is being |
|
* removed. However, ipoib_stop() will attempt to flush |
|
* the workqueue while holding the rtnl lock, so loop |
|
* on trylock until either we get the lock or we see |
|
* FLAG_OPER_UP go away as that signals that we are bailing |
|
* and can safely ignore the carrier on work. |
|
*/ |
|
while (!rtnl_trylock()) { |
|
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
|
return; |
|
else |
|
msleep(20); |
|
} |
|
if (!ipoib_cm_admin_enabled(priv->dev)) |
|
dev_set_mtu(priv->dev, min(priv->mcast_mtu, priv->admin_mtu)); |
|
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 = ipoib_priv(dev); |
|
|
|
ipoib_dbg_mcast(priv, "%sjoin completion for %pI6 (status %d)\n", |
|
test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? |
|
"sendonly " : "", |
|
mcast->mcmember.mgid.raw, status); |
|
|
|
/* We trap for port events ourselves. */ |
|
if (status == -ENETRESET) { |
|
status = 0; |
|
goto out; |
|
} |
|
|
|
if (!status) |
|
status = ipoib_mcast_join_finish(mcast, &multicast->rec); |
|
|
|
if (!status) { |
|
mcast->backoff = 1; |
|
mcast->delay_until = jiffies; |
|
|
|
/* |
|
* Defer carrier on work to priv->wq to avoid a |
|
* deadlock on rtnl_lock here. Requeue our multicast |
|
* work too, which will end up happening right after |
|
* our carrier on task work and will allow us to |
|
* send out all of the non-broadcast joins |
|
*/ |
|
if (mcast == priv->broadcast) { |
|
spin_lock_irq(&priv->lock); |
|
queue_work(priv->wq, &priv->carrier_on_task); |
|
__ipoib_mcast_schedule_join_thread(priv, NULL, 0); |
|
goto out_locked; |
|
} |
|
} else { |
|
bool silent_fail = |
|
test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) && |
|
status == -EINVAL; |
|
|
|
if (mcast->logcount < 20) { |
|
if (status == -ETIMEDOUT || status == -EAGAIN || |
|
silent_fail) { |
|
ipoib_dbg_mcast(priv, "%smulticast join failed for %pI6, status %d\n", |
|
test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", |
|
mcast->mcmember.mgid.raw, status); |
|
} else { |
|
ipoib_warn(priv, "%smulticast join failed for %pI6, status %d\n", |
|
test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", |
|
mcast->mcmember.mgid.raw, status); |
|
} |
|
|
|
if (!silent_fail) |
|
mcast->logcount++; |
|
} |
|
|
|
if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) && |
|
mcast->backoff >= 2) { |
|
/* |
|
* We only retry sendonly joins once before we drop |
|
* the packet and quit trying to deal with the |
|
* group. However, we leave the group in the |
|
* mcast list as an unjoined group. If we want to |
|
* try joining again, we simply queue up a packet |
|
* and restart the join thread. The empty queue |
|
* is why the join thread ignores this group. |
|
*/ |
|
mcast->backoff = 1; |
|
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); |
|
} else { |
|
spin_lock_irq(&priv->lock); |
|
/* Requeue this join task with a backoff delay */ |
|
__ipoib_mcast_schedule_join_thread(priv, mcast, 1); |
|
goto out_locked; |
|
} |
|
} |
|
out: |
|
spin_lock_irq(&priv->lock); |
|
out_locked: |
|
/* |
|
* Make sure to set mcast->mc before we clear the busy flag to avoid |
|
* racing with code that checks for BUSY before checking mcast->mc |
|
*/ |
|
if (status) |
|
mcast->mc = NULL; |
|
else |
|
mcast->mc = multicast; |
|
clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
|
spin_unlock_irq(&priv->lock); |
|
complete(&mcast->done); |
|
|
|
return status; |
|
} |
|
|
|
/* |
|
* Caller must hold 'priv->lock' |
|
*/ |
|
static int ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast) |
|
{ |
|
struct ipoib_dev_priv *priv = ipoib_priv(dev); |
|
struct ib_sa_multicast *multicast; |
|
struct ib_sa_mcmember_rec rec = { |
|
.join_state = 1 |
|
}; |
|
ib_sa_comp_mask comp_mask; |
|
int ret = 0; |
|
|
|
if (!priv->broadcast || |
|
!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
|
return -EINVAL; |
|
|
|
init_completion(&mcast->done); |
|
set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
|
|
|
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 (mcast != priv->broadcast) { |
|
/* |
|
* RFC 4391: |
|
* The MGID MUST use the same P_Key, Q_Key, SL, MTU, |
|
* and HopLimit as those used in the broadcast-GID. The rest |
|
* of attributes SHOULD follow the values used in the |
|
* broadcast-GID as well. |
|
*/ |
|
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; |
|
|
|
/* |
|
* Send-only IB Multicast joins work at the core IB layer but |
|
* require specific SM support. |
|
* We can use such joins here only if the current SM supports that feature. |
|
* However, if not, we emulate an Ethernet multicast send, |
|
* which does not require a multicast subscription and will |
|
* still send properly. The most appropriate thing to |
|
* do is to create the group if it doesn't exist as that |
|
* most closely emulates the behavior, from a user space |
|
* application perspective, of Ethernet multicast operation. |
|
*/ |
|
if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) |
|
rec.join_state = SENDONLY_FULLMEMBER_JOIN; |
|
} |
|
spin_unlock_irq(&priv->lock); |
|
|
|
multicast = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port, |
|
&rec, comp_mask, GFP_KERNEL, |
|
ipoib_mcast_join_complete, mcast); |
|
spin_lock_irq(&priv->lock); |
|
if (IS_ERR(multicast)) { |
|
ret = PTR_ERR(multicast); |
|
ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret); |
|
/* Requeue this join task with a backoff delay */ |
|
__ipoib_mcast_schedule_join_thread(priv, mcast, 1); |
|
clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
|
spin_unlock_irq(&priv->lock); |
|
complete(&mcast->done); |
|
spin_lock_irq(&priv->lock); |
|
} |
|
return 0; |
|
} |
|
|
|
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; |
|
struct ib_port_attr port_attr; |
|
unsigned long delay_until = 0; |
|
struct ipoib_mcast *mcast = NULL; |
|
|
|
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
|
return; |
|
|
|
if (ib_query_port(priv->ca, priv->port, &port_attr)) { |
|
ipoib_dbg(priv, "ib_query_port() failed\n"); |
|
return; |
|
} |
|
if (port_attr.state != IB_PORT_ACTIVE) { |
|
ipoib_dbg(priv, "port state is not ACTIVE (state = %d) suspending join task\n", |
|
port_attr.state); |
|
return; |
|
} |
|
priv->local_lid = port_attr.lid; |
|
netif_addr_lock_bh(dev); |
|
|
|
if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) { |
|
netif_addr_unlock_bh(dev); |
|
return; |
|
} |
|
netif_addr_unlock_bh(dev); |
|
|
|
spin_lock_irq(&priv->lock); |
|
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
|
goto out; |
|
|
|
if (!priv->broadcast) { |
|
struct ipoib_mcast *broadcast; |
|
|
|
broadcast = ipoib_mcast_alloc(dev); |
|
if (!broadcast) { |
|
ipoib_warn(priv, "failed to allocate broadcast group\n"); |
|
/* |
|
* Restart us after a 1 second delay to retry |
|
* creating our broadcast group and attaching to |
|
* it. Until this succeeds, this ipoib dev is |
|
* completely stalled (multicast wise). |
|
*/ |
|
__ipoib_mcast_schedule_join_thread(priv, NULL, 1); |
|
goto out; |
|
} |
|
|
|
memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, |
|
sizeof (union ib_gid)); |
|
priv->broadcast = broadcast; |
|
|
|
__ipoib_mcast_add(dev, priv->broadcast); |
|
} |
|
|
|
if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { |
|
if (IS_ERR_OR_NULL(priv->broadcast->mc) && |
|
!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) { |
|
mcast = priv->broadcast; |
|
if (mcast->backoff > 1 && |
|
time_before(jiffies, mcast->delay_until)) { |
|
delay_until = mcast->delay_until; |
|
mcast = NULL; |
|
} |
|
} |
|
goto out; |
|
} |
|
|
|
/* |
|
* We'll never get here until the broadcast group is both allocated |
|
* and attached |
|
*/ |
|
list_for_each_entry(mcast, &priv->multicast_list, list) { |
|
if (IS_ERR_OR_NULL(mcast->mc) && |
|
!test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) && |
|
(!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) || |
|
!skb_queue_empty(&mcast->pkt_queue))) { |
|
if (mcast->backoff == 1 || |
|
time_after_eq(jiffies, mcast->delay_until)) { |
|
/* Found the next unjoined group */ |
|
if (ipoib_mcast_join(dev, mcast)) { |
|
spin_unlock_irq(&priv->lock); |
|
return; |
|
} |
|
} else if (!delay_until || |
|
time_before(mcast->delay_until, delay_until)) |
|
delay_until = mcast->delay_until; |
|
} |
|
} |
|
|
|
mcast = NULL; |
|
ipoib_dbg_mcast(priv, "successfully started all multicast joins\n"); |
|
|
|
out: |
|
if (delay_until) { |
|
cancel_delayed_work(&priv->mcast_task); |
|
queue_delayed_work(priv->wq, &priv->mcast_task, |
|
delay_until - jiffies); |
|
} |
|
if (mcast) |
|
ipoib_mcast_join(dev, mcast); |
|
|
|
spin_unlock_irq(&priv->lock); |
|
} |
|
|
|
void ipoib_mcast_start_thread(struct net_device *dev) |
|
{ |
|
struct ipoib_dev_priv *priv = ipoib_priv(dev); |
|
unsigned long flags; |
|
|
|
ipoib_dbg_mcast(priv, "starting multicast thread\n"); |
|
|
|
spin_lock_irqsave(&priv->lock, flags); |
|
__ipoib_mcast_schedule_join_thread(priv, NULL, 0); |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
} |
|
|
|
void ipoib_mcast_stop_thread(struct net_device *dev) |
|
{ |
|
struct ipoib_dev_priv *priv = ipoib_priv(dev); |
|
|
|
ipoib_dbg_mcast(priv, "stopping multicast thread\n"); |
|
|
|
cancel_delayed_work_sync(&priv->mcast_task); |
|
} |
|
|
|
static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) |
|
{ |
|
struct ipoib_dev_priv *priv = ipoib_priv(dev); |
|
struct rdma_netdev *rn = netdev_priv(dev); |
|
int ret = 0; |
|
|
|
if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
|
ipoib_warn(priv, "ipoib_mcast_leave on an in-flight join\n"); |
|
|
|
if (!IS_ERR_OR_NULL(mcast->mc)) |
|
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 = rn->detach_mcast(dev, priv->ca, &mcast->mcmember.mgid, |
|
be16_to_cpu(mcast->mcmember.mlid)); |
|
if (ret) |
|
ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); |
|
} else if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) |
|
ipoib_dbg(priv, "leaving with no mcmember but not a " |
|
"SENDONLY join\n"); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Check if the multicast group is sendonly. If so remove it from the maps |
|
* and add to the remove list |
|
*/ |
|
void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid, |
|
struct list_head *remove_list) |
|
{ |
|
/* Is this multicast ? */ |
|
if (*mgid == 0xff) { |
|
struct ipoib_mcast *mcast = __ipoib_mcast_find(priv->dev, mgid); |
|
|
|
if (mcast && test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { |
|
list_del(&mcast->list); |
|
rb_erase(&mcast->rb_node, &priv->multicast_tree); |
|
list_add_tail(&mcast->list, remove_list); |
|
} |
|
} |
|
} |
|
|
|
void ipoib_mcast_remove_list(struct list_head *remove_list) |
|
{ |
|
struct ipoib_mcast *mcast, *tmcast; |
|
|
|
/* |
|
* make sure the in-flight joins have finished before we attempt |
|
* to leave |
|
*/ |
|
list_for_each_entry_safe(mcast, tmcast, remove_list, list) |
|
if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
|
wait_for_completion(&mcast->done); |
|
|
|
list_for_each_entry_safe(mcast, tmcast, remove_list, list) { |
|
ipoib_mcast_leave(mcast->dev, mcast); |
|
ipoib_mcast_free(mcast); |
|
} |
|
} |
|
|
|
void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb) |
|
{ |
|
struct ipoib_dev_priv *priv = ipoib_priv(dev); |
|
struct rdma_netdev *rn = netdev_priv(dev); |
|
struct ipoib_mcast *mcast; |
|
unsigned long flags; |
|
void *mgid = daddr + 4; |
|
|
|
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 || !mcast->ah) { |
|
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); |
|
if (!mcast) { |
|
ipoib_warn(priv, "unable to allocate memory " |
|
"for multicast structure\n"); |
|
++dev->stats.tx_dropped; |
|
dev_kfree_skb_any(skb); |
|
goto unlock; |
|
} |
|
|
|
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 (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) { |
|
/* put pseudoheader back on for next time */ |
|
skb_push(skb, sizeof(struct ipoib_pseudo_header)); |
|
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_mcast_schedule_join_thread(priv, NULL, 0); |
|
} |
|
} else { |
|
struct ipoib_neigh *neigh; |
|
|
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
neigh = ipoib_neigh_get(dev, daddr); |
|
spin_lock_irqsave(&priv->lock, flags); |
|
if (!neigh) { |
|
neigh = ipoib_neigh_alloc(daddr, dev); |
|
/* Make sure that the neigh will be added only |
|
* once to mcast list. |
|
*/ |
|
if (neigh && list_empty(&neigh->list)) { |
|
kref_get(&mcast->ah->ref); |
|
neigh->ah = mcast->ah; |
|
neigh->ah->valid = 1; |
|
list_add_tail(&neigh->list, &mcast->neigh_list); |
|
} |
|
} |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
mcast->ah->last_send = rn->send(dev, skb, mcast->ah->ah, |
|
IB_MULTICAST_QPN); |
|
if (neigh) |
|
ipoib_neigh_put(neigh); |
|
return; |
|
} |
|
|
|
unlock: |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
} |
|
|
|
void ipoib_mcast_dev_flush(struct net_device *dev) |
|
{ |
|
struct ipoib_dev_priv *priv = ipoib_priv(dev); |
|
LIST_HEAD(remove_list); |
|
struct ipoib_mcast *mcast, *tmcast; |
|
unsigned long flags; |
|
|
|
mutex_lock(&priv->mcast_mutex); |
|
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); |
|
|
|
ipoib_mcast_remove_list(&remove_list); |
|
mutex_unlock(&priv->mcast_mutex); |
|
} |
|
|
|
static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast) |
|
{ |
|
/* reserved QPN, prefix, scope */ |
|
if (memcmp(addr, broadcast, 6)) |
|
return 0; |
|
/* signature lower, pkey */ |
|
if (memcmp(addr + 7, broadcast + 7, 3)) |
|
return 0; |
|
return 1; |
|
} |
|
|
|
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 netdev_hw_addr *ha; |
|
struct ipoib_mcast *mcast, *tmcast; |
|
LIST_HEAD(remove_list); |
|
struct ib_sa_mcmember_rec rec; |
|
|
|
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
|
/* |
|
* shortcut...on shutdown flush is called next, just |
|
* let it do all the work |
|
*/ |
|
return; |
|
|
|
ipoib_dbg_mcast(priv, "restarting multicast task\n"); |
|
|
|
netif_addr_lock_bh(dev); |
|
spin_lock_irq(&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 */ |
|
netdev_for_each_mc_addr(ha, dev) { |
|
union ib_gid mgid; |
|
|
|
if (!ipoib_mcast_addr_is_valid(ha->addr, dev->broadcast)) |
|
continue; |
|
|
|
memcpy(mgid.raw, ha->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); |
|
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_irq(&priv->lock); |
|
netif_addr_unlock_bh(dev); |
|
|
|
ipoib_mcast_remove_list(&remove_list); |
|
|
|
/* |
|
* Double check that we are still up |
|
*/ |
|
if (test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
|
spin_lock_irq(&priv->lock); |
|
__ipoib_mcast_schedule_join_thread(priv, NULL, 0); |
|
spin_unlock_irq(&priv->lock); |
|
} |
|
} |
|
|
|
#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 = ipoib_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 */
|
|
|