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OpenCloudOS-Kernel/drivers/infiniband/ulp/ipoib/ipoib_multicast.c

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/*
* 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);
*to_ipoib_neigh(neigh->neighbour) = NULL;
kfree(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, 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);
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,
.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
}
};
int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate);
av.grh.dgid = mcast->mcmember.mgid;
if (path_rate > 0 && priv->local_rate > path_rate)
av.static_rate = (priv->local_rate - 1) / path_rate;
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));
ah = ipoib_create_ah(dev, priv->pd, &av);
if (!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);
}
spin_lock_irq(&priv->lock);
mcast->ah = ah;
spin_unlock_irq(&priv->lock);
}
/* 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);
}
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(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_work(ipoib_workqueue, &priv->mcast_task);
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_work(ipoib_workqueue, &priv->mcast_task);
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_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;
}
init_completion(&mcast->done);
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;
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(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) {
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;
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_work(ipoib_workqueue, &priv->mcast_task);
mutex_unlock(&mcast_mutex);
spin_lock_irq(&priv->lock);
set_bit(IPOIB_MCAST_STARTED, &priv->flags);
spin_unlock_irq(&priv->lock);
return 0;
}
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);
spin_lock_irq(&priv->lock);
if (priv->broadcast && priv->broadcast->query) {
ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query);
priv->broadcast->query = NULL;
spin_unlock_irq(&priv->lock);
ipoib_dbg_mcast(priv, "waiting for bcast\n");
wait_for_completion(&priv->broadcast->done);
} else
spin_unlock_irq(&priv->lock);
list_for_each_entry(mcast, &priv->multicast_list, list) {
spin_lock_irq(&priv->lock);
if (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);
}
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(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);
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_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);
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 {
++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 = 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);
}
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(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, 0);
spin_lock_irqsave(&dev->xmit_lock, flags);
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_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(&priv->lock);
spin_unlock_irqrestore(&dev->xmit_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);
}
#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 */
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