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Last minute InfiniBand/RDMA changes for 3.19:

Browse source 
- Revert IPoIB driver back to 3.18 state.  We had a number of fixes go
    into 3.19, but they introduced regressions.  We tried to get everything
    fixed up but ran out of time, so we'll try again for 3.20.
  - Similarly, turn off the new "extended query port" verb.  Late in the
    cycle we realized the ABI is not quite right, and rather than freeze
    something in a rush and make a mistake, we'll take a bit more time
    and get it right in 3.20.
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull infiniband reverts from Roland Dreier:
 "Last minute InfiniBand/RDMA changes for 3.19:

   - Revert IPoIB driver back to 3.18 state.  We had a number of fixes
     go into 3.19, but they introduced regressions.  We tried to get
     everything fixed up but ran out of time, so we'll try again for
     3.20.

   - Similarly, turn off the new "extended query port" verb.  Late in
     the cycle we realized the ABI is not quite right, and rather than
     freeze something in a rush and make a mistake, we'll take a bit
     more time and get it right in 3.20"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/core: Temporarily disable ex_query_device uverb
  Revert "IPoIB: Consolidate rtnl_lock tasks in workqueue"
  Revert "IPoIB: Make the carrier_on_task race aware"
  Revert "IPoIB: fix MCAST_FLAG_BUSY usage"
  Revert "IPoIB: fix mcast_dev_flush/mcast_restart_task race"
  Revert "IPoIB: change init sequence ordering"
  Revert "IPoIB: Use dedicated workqueues per interface"
  Revert "IPoIB: Make ipoib_mcast_stop_thread flush the workqueue"
  Revert "IPoIB: No longer use flush as a parameter"
This commit is contained in:
Linus Torvalds 2015-02-03 20:12:57 -08:00
parent 59acf65776 ecb7b1233c
commit dc6d684411
7 changed files with 135 additions and 242 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/infiniband/core/uverbs_main.c
View file

@ -123,7 +123,6 @@ static int (*uverbs_ex_cmd_table[])(struct ib_uverbs_file *file,
struct ib_udata *uhw) = {
[IB_USER_VERBS_EX_CMD_CREATE_FLOW] = ib_uverbs_ex_create_flow,
[IB_USER_VERBS_EX_CMD_DESTROY_FLOW] = ib_uverbs_ex_destroy_flow,
[IB_USER_VERBS_EX_CMD_QUERY_DEVICE] = ib_uverbs_ex_query_device
};
static void ib_uverbs_add_one(struct ib_device *device);

19
drivers/infiniband/ulp/ipoib/ipoib.h
View file

@ -98,15 +98,9 @@ enum {
IPOIB_MCAST_FLAG_FOUND = 0, /* used in set_multicast_list */
IPOIB_MCAST_FLAG_SENDONLY = 1,
/*
* For IPOIB_MCAST_FLAG_BUSY
* When set, in flight join and mcast->mc is unreliable
* When clear and mcast->mc IS_ERR_OR_NULL, need to restart or
* haven't started yet
* When clear and mcast->mc is valid pointer, join was successful
*/
IPOIB_MCAST_FLAG_BUSY = 2,
IPOIB_MCAST_FLAG_BUSY = 2, /* joining or already joined */
IPOIB_MCAST_FLAG_ATTACHED = 3,
IPOIB_MCAST_JOIN_STARTED = 4,
MAX_SEND_CQE = 16,
IPOIB_CM_COPYBREAK = 256,
@ -323,7 +317,6 @@ struct ipoib_dev_priv {
struct list_head multicast_list;
struct rb_root multicast_tree;
struct workqueue_struct *wq;
struct delayed_work mcast_task;
struct work_struct carrier_on_task;
struct work_struct flush_light;
@ -484,10 +477,10 @@ void ipoib_ib_dev_flush_heavy(struct work_struct *work);
void ipoib_pkey_event(struct work_struct *work);
void ipoib_ib_dev_cleanup(struct net_device *dev);
int ipoib_ib_dev_open(struct net_device *dev);
int ipoib_ib_dev_open(struct net_device *dev, int flush);
int ipoib_ib_dev_up(struct net_device *dev);
int ipoib_ib_dev_down(struct net_device *dev);
int ipoib_ib_dev_stop(struct net_device *dev);
int ipoib_ib_dev_down(struct net_device *dev, int flush);
int ipoib_ib_dev_stop(struct net_device *dev, int flush);
void ipoib_pkey_dev_check_presence(struct net_device *dev);
int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
@ -499,7 +492,7 @@ void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
void ipoib_mcast_restart_task(struct work_struct *work);
int ipoib_mcast_start_thread(struct net_device *dev);
int ipoib_mcast_stop_thread(struct net_device *dev);
int ipoib_mcast_stop_thread(struct net_device *dev, int flush);
void ipoib_mcast_dev_down(struct net_device *dev);
void ipoib_mcast_dev_flush(struct net_device *dev);

18
drivers/infiniband/ulp/ipoib/ipoib_cm.c
View file

@ -474,7 +474,7 @@ static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *even
}
spin_lock_irq(&priv->lock);
queue_delayed_work(priv->wq,
queue_delayed_work(ipoib_workqueue,
&priv->cm.stale_task, IPOIB_CM_RX_DELAY);
/* Add this entry to passive ids list head, but do not re-add it
* if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */
@ -576,7 +576,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
spin_lock_irqsave(&priv->lock, flags);
list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list);
ipoib_cm_start_rx_drain(priv);
queue_work(priv->wq, &priv->cm.rx_reap_task);
queue_work(ipoib_workqueue, &priv->cm.rx_reap_task);
spin_unlock_irqrestore(&priv->lock, flags);
} else
ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n",
@ -603,7 +603,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
spin_lock_irqsave(&priv->lock, flags);
list_move(&p->list, &priv->cm.rx_reap_list);
spin_unlock_irqrestore(&priv->lock, flags);
queue_work(priv->wq, &priv->cm.rx_reap_task);
queue_work(ipoib_workqueue, &priv->cm.rx_reap_task);
}
return;
}
@ -827,7 +827,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) {
list_move(&tx->list, &priv->cm.reap_list);
queue_work(priv->wq, &priv->cm.reap_task);
queue_work(ipoib_workqueue, &priv->cm.reap_task);
}
clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags);
@ -1255,7 +1255,7 @@ static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id,
if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) {
list_move(&tx->list, &priv->cm.reap_list);
queue_work(priv->wq, &priv->cm.reap_task);
queue_work(ipoib_workqueue, &priv->cm.reap_task);
}
spin_unlock_irqrestore(&priv->lock, flags);
@ -1284,7 +1284,7 @@ struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path
tx->dev = dev;
list_add(&tx->list, &priv->cm.start_list);
set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags);
queue_work(priv->wq, &priv->cm.start_task);
queue_work(ipoib_workqueue, &priv->cm.start_task);
return tx;
}
@ -1295,7 +1295,7 @@ void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) {
spin_lock_irqsave(&priv->lock, flags);
list_move(&tx->list, &priv->cm.reap_list);
queue_work(priv->wq, &priv->cm.reap_task);
queue_work(ipoib_workqueue, &priv->cm.reap_task);
ipoib_dbg(priv, "Reap connection for gid %pI6\n",
tx->neigh->daddr + 4);
tx->neigh = NULL;
@ -1417,7 +1417,7 @@ void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
skb_queue_tail(&priv->cm.skb_queue, skb);
if (e)
queue_work(priv->wq, &priv->cm.skb_task);
queue_work(ipoib_workqueue, &priv->cm.skb_task);
}
static void ipoib_cm_rx_reap(struct work_struct *work)
@ -1450,7 +1450,7 @@ static void ipoib_cm_stale_task(struct work_struct *work)
}
if (!list_empty(&priv->cm.passive_ids))
queue_delayed_work(priv->wq,
queue_delayed_work(ipoib_workqueue,
&priv->cm.stale_task, IPOIB_CM_RX_DELAY);
spin_unlock_irq(&priv->lock);
}

27
drivers/infiniband/ulp/ipoib/ipoib_ib.c
View file

@ -655,7 +655,7 @@ void ipoib_reap_ah(struct work_struct *work)
__ipoib_reap_ah(dev);
if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
queue_delayed_work(priv->wq, &priv->ah_reap_task,
queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
round_jiffies_relative(HZ));
}
@ -664,7 +664,7 @@ static void ipoib_ib_tx_timer_func(unsigned long ctx)
drain_tx_cq((struct net_device *)ctx);
}
int ipoib_ib_dev_open(struct net_device *dev)
int ipoib_ib_dev_open(struct net_device *dev, int flush)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
int ret;
@ -696,7 +696,7 @@ int ipoib_ib_dev_open(struct net_device *dev)
}
clear_bit(IPOIB_STOP_REAPER, &priv->flags);
queue_delayed_work(priv->wq, &priv->ah_reap_task,
queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
round_jiffies_relative(HZ));
if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
@ -706,7 +706,7 @@ int ipoib_ib_dev_open(struct net_device *dev)
dev_stop:
if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
napi_enable(&priv->napi);
ipoib_ib_dev_stop(dev);
ipoib_ib_dev_stop(dev, flush);
return -1;
}
@ -738,7 +738,7 @@ int ipoib_ib_dev_up(struct net_device *dev)
return ipoib_mcast_start_thread(dev);
}
int ipoib_ib_dev_down(struct net_device *dev)
int ipoib_ib_dev_down(struct net_device *dev, int flush)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
@ -747,7 +747,7 @@ int ipoib_ib_dev_down(struct net_device *dev)
clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
netif_carrier_off(dev);
ipoib_mcast_stop_thread(dev);
ipoib_mcast_stop_thread(dev, flush);
ipoib_mcast_dev_flush(dev);
ipoib_flush_paths(dev);
@ -807,7 +807,7 @@ void ipoib_drain_cq(struct net_device *dev)
local_bh_enable();
}
int ipoib_ib_dev_stop(struct net_device *dev)
int ipoib_ib_dev_stop(struct net_device *dev, int flush)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ib_qp_attr qp_attr;
@ -880,7 +880,8 @@ timeout:
/* Wait for all AHs to be reaped */
set_bit(IPOIB_STOP_REAPER, &priv->flags);
cancel_delayed_work(&priv->ah_reap_task);
flush_workqueue(priv->wq);
if (flush)
flush_workqueue(ipoib_workqueue);
begin = jiffies;
@ -917,7 +918,7 @@ int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
(unsigned long) dev);
if (dev->flags & IFF_UP) {
if (ipoib_ib_dev_open(dev)) {
if (ipoib_ib_dev_open(dev, 1)) {
ipoib_transport_dev_cleanup(dev);
return -ENODEV;
}
@ -1039,12 +1040,12 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
}
if (level >= IPOIB_FLUSH_NORMAL)
ipoib_ib_dev_down(dev);
ipoib_ib_dev_down(dev, 0);
if (level == IPOIB_FLUSH_HEAVY) {
if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
ipoib_ib_dev_stop(dev);
if (ipoib_ib_dev_open(dev) != 0)
ipoib_ib_dev_stop(dev, 0);
if (ipoib_ib_dev_open(dev, 0) != 0)
return;
if (netif_queue_stopped(dev))
netif_start_queue(dev);
@ -1096,7 +1097,7 @@ void ipoib_ib_dev_cleanup(struct net_device *dev)
*/
ipoib_flush_paths(dev);
ipoib_mcast_stop_thread(dev);
ipoib_mcast_stop_thread(dev, 1);
ipoib_mcast_dev_flush(dev);
ipoib_transport_dev_cleanup(dev);

49
drivers/infiniband/ulp/ipoib/ipoib_main.c
View file

@ -108,7 +108,7 @@ int ipoib_open(struct net_device *dev)
set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
if (ipoib_ib_dev_open(dev)) {
if (ipoib_ib_dev_open(dev, 1)) {
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
return 0;
goto err_disable;
@ -139,7 +139,7 @@ int ipoib_open(struct net_device *dev)
return 0;
err_stop:
ipoib_ib_dev_stop(dev);
ipoib_ib_dev_stop(dev, 1);
err_disable:
clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
@ -157,8 +157,8 @@ static int ipoib_stop(struct net_device *dev)
netif_stop_queue(dev);
ipoib_ib_dev_down(dev);
ipoib_ib_dev_stop(dev);
ipoib_ib_dev_down(dev, 1);
ipoib_ib_dev_stop(dev, 0);
if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
struct ipoib_dev_priv *cpriv;
@ -839,7 +839,7 @@ static void ipoib_set_mcast_list(struct net_device *dev)
return;
}
queue_work(priv->wq, &priv->restart_task);
queue_work(ipoib_workqueue, &priv->restart_task);
}
static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr)
@ -954,7 +954,7 @@ static void ipoib_reap_neigh(struct work_struct *work)
__ipoib_reap_neigh(priv);
if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
queue_delayed_work(priv->wq, &priv->neigh_reap_task,
queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task,
arp_tbl.gc_interval);
}
@ -1133,7 +1133,7 @@ static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv)
/* start garbage collection */
clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
queue_delayed_work(priv->wq, &priv->neigh_reap_task,
queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task,
arp_tbl.gc_interval);
return 0;
@ -1262,13 +1262,15 @@ int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
if (ipoib_neigh_hash_init(priv) < 0)
goto out;
/* Allocate RX/TX "rings" to hold queued skbs */
priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
GFP_KERNEL);
if (!priv->rx_ring) {
printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
ca->name, ipoib_recvq_size);
goto out;
goto out_neigh_hash_cleanup;
}
priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
@ -1283,24 +1285,16 @@ int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
if (ipoib_ib_dev_init(dev, ca, port))
goto out_tx_ring_cleanup;
/*
* Must be after ipoib_ib_dev_init so we can allocate a per
* device wq there and use it here
*/
if (ipoib_neigh_hash_init(priv) < 0)
goto out_dev_uninit;
return 0;
out_dev_uninit:
ipoib_ib_dev_cleanup(dev);
out_tx_ring_cleanup:
vfree(priv->tx_ring);
out_rx_ring_cleanup:
kfree(priv->rx_ring);
out_neigh_hash_cleanup:
ipoib_neigh_hash_uninit(dev);
out:
return -ENOMEM;
}
@ -1323,12 +1317,6 @@ void ipoib_dev_cleanup(struct net_device *dev)
}
unregister_netdevice_many(&head);
/*
* Must be before ipoib_ib_dev_cleanup or we delete an in use
* work queue
*/
ipoib_neigh_hash_uninit(dev);
ipoib_ib_dev_cleanup(dev);
kfree(priv->rx_ring);
@ -1336,6 +1324,8 @@ void ipoib_dev_cleanup(struct net_device *dev)
priv->rx_ring = NULL;
priv->tx_ring = NULL;
ipoib_neigh_hash_uninit(dev);
}
static const struct header_ops ipoib_header_ops = {
@ -1646,7 +1636,7 @@ register_failed:
/* Stop GC if started before flush */
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
cancel_delayed_work(&priv->neigh_reap_task);
flush_workqueue(priv->wq);
flush_workqueue(ipoib_workqueue);
event_failed:
ipoib_dev_cleanup(priv->dev);
@ -1717,7 +1707,7 @@ static void ipoib_remove_one(struct ib_device *device)
/* Stop GC */
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
cancel_delayed_work(&priv->neigh_reap_task);
flush_workqueue(priv->wq);
flush_workqueue(ipoib_workqueue);
unregister_netdev(priv->dev);
free_netdev(priv->dev);
@ -1758,13 +1748,8 @@ static int __init ipoib_init_module(void)
* unregister_netdev() and linkwatch_event take the rtnl lock,
* so flush_scheduled_work() can deadlock during device
* removal.
*
* In addition, bringing one device up and another down at the
* same time can deadlock a single workqueue, so we have this
* global fallback workqueue, but we also attempt to open a
* per device workqueue each time we bring an interface up
*/
ipoib_workqueue = create_singlethread_workqueue("ipoib_flush");
ipoib_workqueue = create_singlethread_workqueue("ipoib");
if (!ipoib_workqueue) {
ret = -ENOMEM;
goto err_fs;

241
drivers/infiniband/ulp/ipoib/ipoib_multicast.c
View file

@ -190,6 +190,12 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
spin_unlock_irq(&priv->lock);
priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
set_qkey = 1;
if (!ipoib_cm_admin_enabled(dev)) {
rtnl_lock();
dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu));
rtnl_unlock();
}
}
if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
@ -271,27 +277,16 @@ ipoib_mcast_sendonly_join_complete(int status,
struct ipoib_mcast *mcast = multicast->context;
struct net_device *dev = mcast->dev;
/*
* We have to take the mutex to force mcast_sendonly_join to
* return from ib_sa_multicast_join and set mcast->mc to a
* valid value. Otherwise we were racing with ourselves in
* that we might fail here, but get a valid return from
* ib_sa_multicast_join after we had cleared mcast->mc here,
* resulting in mis-matched joins and leaves and a deadlock
*/
mutex_lock(&mcast_mutex);
/* We trap for port events ourselves. */
if (status == -ENETRESET)
goto out;
return 0;
if (!status)
status = ipoib_mcast_join_finish(mcast, &multicast->rec);
if (status) {
if (mcast->logcount++ < 20)
ipoib_dbg_mcast(netdev_priv(dev), "sendonly multicast "
"join failed for %pI6, status %d\n",
ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for %pI6, status %d\n",
mcast->mcmember.mgid.raw, status);
/* Flush out any queued packets */
@ -301,15 +296,11 @@ ipoib_mcast_sendonly_join_complete(int status,
dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
}
netif_tx_unlock_bh(dev);
/* Clear the busy flag so we try again */
status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY,
&mcast->flags);
}
out:
clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
if (status)
mcast->mc = NULL;
complete(&mcast->done);
if (status == -ENETRESET)
status = 0;
mutex_unlock(&mcast_mutex);
return status;
}
@ -327,14 +318,12 @@ static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
int ret = 0;
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
ipoib_dbg_mcast(priv, "device shutting down, no sendonly "
"multicast joins\n");
ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
return -ENODEV;
}
if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
ipoib_dbg_mcast(priv, "multicast entry busy, skipping "
"sendonly join\n");
if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
return -EBUSY;
}
@ -342,9 +331,6 @@ static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
rec.port_gid = priv->local_gid;
rec.pkey = cpu_to_be16(priv->pkey);
mutex_lock(&mcast_mutex);
init_completion(&mcast->done);
set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca,
priv->port, &rec,
IB_SA_MCMEMBER_REC_MGID |
@ -357,14 +343,12 @@ static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
if (IS_ERR(mcast->mc)) {
ret = PTR_ERR(mcast->mc);
clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
complete(&mcast->done);
ipoib_warn(priv, "ib_sa_join_multicast for sendonly join "
"failed (ret = %d)\n", ret);
ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n",
ret);
} else {
ipoib_dbg_mcast(priv, "no multicast record for %pI6, starting "
"sendonly join\n", mcast->mcmember.mgid.raw);
ipoib_dbg_mcast(priv, "no multicast record for %pI6, starting join\n",
mcast->mcmember.mgid.raw);
}
mutex_unlock(&mcast_mutex);
return ret;
}
@ -375,29 +359,18 @@ void ipoib_mcast_carrier_on_task(struct work_struct *work)
carrier_on_task);
struct ib_port_attr attr;
/*
* Take rtnl_lock to avoid racing with ipoib_stop() and
* turning the carrier back on while a device is being
* removed.
*/
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_ADMIN_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_ADMIN_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));
rtnl_lock();
netif_carrier_on(priv->dev);
rtnl_unlock();
}
@ -412,63 +385,60 @@ static int ipoib_mcast_join_complete(int status,
ipoib_dbg_mcast(priv, "join completion for %pI6 (status %d)\n",
mcast->mcmember.mgid.raw, status);
/*
* We have to take the mutex to force mcast_join to
* return from ib_sa_multicast_join and set mcast->mc to a
* valid value. Otherwise we were racing with ourselves in
* that we might fail here, but get a valid return from
* ib_sa_multicast_join after we had cleared mcast->mc here,
* resulting in mis-matched joins and leaves and a deadlock
*/
mutex_lock(&mcast_mutex);
/* We trap for port events ourselves. */
if (status == -ENETRESET)
if (status == -ENETRESET) {
status = 0;
goto out;
}
if (!status)
status = ipoib_mcast_join_finish(mcast, &multicast->rec);
if (!status) {
mcast->backoff = 1;
mutex_lock(&mcast_mutex);
if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
queue_delayed_work(priv->wq, &priv->mcast_task, 0);
queue_delayed_work(ipoib_workqueue,
&priv->mcast_task, 0);
mutex_unlock(&mcast_mutex);
/*
* Defer carrier on work to priv->wq to avoid a
* Defer carrier on work to ipoib_workqueue to avoid a
* deadlock on rtnl_lock here.
*/
if (mcast == priv->broadcast)
queue_work(priv->wq, &priv->carrier_on_task);
} else {
if (mcast->logcount++ < 20) {
if (status == -ETIMEDOUT || status == -EAGAIN) {
ipoib_dbg_mcast(priv, "multicast join failed for %pI6, status %d\n",
mcast->mcmember.mgid.raw, status);
} else {
ipoib_warn(priv, "multicast join failed for %pI6, status %d\n",
mcast->mcmember.mgid.raw, status);
}
}
queue_work(ipoib_workqueue, &priv->carrier_on_task);
mcast->backoff *= 2;
if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
}
out:
spin_lock_irq(&priv->lock);
clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
if (status)
mcast->mc = NULL;
complete(&mcast->done);
if (status == -ENETRESET)
status = 0;
if (status && test_bit(IPOIB_MCAST_RUN, &priv->flags))
queue_delayed_work(priv->wq, &priv->mcast_task,
goto out;
}
if (mcast->logcount++ < 20) {
if (status == -ETIMEDOUT || status == -EAGAIN) {
ipoib_dbg_mcast(priv, "multicast join failed for %pI6, status %d\n",
mcast->mcmember.mgid.raw, status);
} else {
ipoib_warn(priv, "multicast join failed for %pI6, status %d\n",
mcast->mcmember.mgid.raw, status);
}
}
mcast->backoff *= 2;
if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
/* Clear the busy flag so we try again */
status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
mutex_lock(&mcast_mutex);
spin_lock_irq(&priv->lock);
if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
mcast->backoff * HZ);
spin_unlock_irq(&priv->lock);
mutex_unlock(&mcast_mutex);
out:
complete(&mcast->done);
return status;
}
@ -517,9 +487,10 @@ static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
rec.hop_limit = priv->broadcast->mcmember.hop_limit;
}
mutex_lock(&mcast_mutex);
init_completion(&mcast->done);
set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
init_completion(&mcast->done);
set_bit(IPOIB_MCAST_JOIN_STARTED, &mcast->flags);
mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port,
&rec, comp_mask, GFP_KERNEL,
ipoib_mcast_join_complete, mcast);
@ -533,11 +504,13 @@ static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
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(priv->wq, &priv->mcast_task,
queue_delayed_work(ipoib_workqueue,
&priv->mcast_task,
mcast->backoff * HZ);
mutex_unlock(&mcast_mutex);
}
mutex_unlock(&mcast_mutex);
}
void ipoib_mcast_join_task(struct work_struct *work)
@ -574,8 +547,8 @@ void ipoib_mcast_join_task(struct work_struct *work)
ipoib_warn(priv, "failed to allocate broadcast group\n");
mutex_lock(&mcast_mutex);
if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
queue_delayed_work(priv->wq, &priv->mcast_task,
HZ);
queue_delayed_work(ipoib_workqueue,
&priv->mcast_task, HZ);
mutex_unlock(&mcast_mutex);
return;
}
@ -590,8 +563,7 @@ void ipoib_mcast_join_task(struct work_struct *work)
}
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))
if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags))
ipoib_mcast_join(dev, priv->broadcast, 0);
return;
}
@ -599,33 +571,23 @@ void ipoib_mcast_join_task(struct work_struct *work)
while (1) {
struct ipoib_mcast *mcast = NULL;
/*
* Need the mutex so our flags are consistent, need the
* priv->lock so we don't race with list removals in either
* mcast_dev_flush or mcast_restart_task
*/
mutex_lock(&mcast_mutex);
spin_lock_irq(&priv->lock);
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_ATTACHED, &mcast->flags)) {
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);
mutex_unlock(&mcast_mutex);
if (&mcast->list == &priv->multicast_list) {
/* All done */
break;
}
if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
ipoib_mcast_sendonly_join(mcast);
else
ipoib_mcast_join(dev, mcast, 1);
ipoib_mcast_join(dev, mcast, 1);
return;
}
@ -642,13 +604,13 @@ int ipoib_mcast_start_thread(struct net_device *dev)
mutex_lock(&mcast_mutex);
if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
queue_delayed_work(priv->wq, &priv->mcast_task, 0);
queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0);
mutex_unlock(&mcast_mutex);
return 0;
}
int ipoib_mcast_stop_thread(struct net_device *dev)
int ipoib_mcast_stop_thread(struct net_device *dev, int flush)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
@ -659,7 +621,8 @@ int ipoib_mcast_stop_thread(struct net_device *dev)
cancel_delayed_work(&priv->mcast_task);
mutex_unlock(&mcast_mutex);
flush_workqueue(priv->wq);
if (flush)
flush_workqueue(ipoib_workqueue);
return 0;
}
@ -670,9 +633,6 @@ static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
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)) {
@ -725,8 +685,6 @@ void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid));
__ipoib_mcast_add(dev, mcast);
list_add_tail(&mcast->list, &priv->multicast_list);
if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
queue_delayed_work(priv->wq, &priv->mcast_task, 0);
}
if (!mcast->ah) {
@ -740,6 +698,8 @@ void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
ipoib_dbg_mcast(priv, "no address vector, "
"but multicast join already started\n");
else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
ipoib_mcast_sendonly_join(mcast);
/*
* If lookup completes between here and out:, don't
@ -799,12 +759,9 @@ void ipoib_mcast_dev_flush(struct net_device *dev)
spin_unlock_irqrestore(&priv->lock, flags);
/*
* make sure the in-flight joins have finished before we attempt
* to leave
*/
/* seperate between the wait to the leave*/
list_for_each_entry_safe(mcast, tmcast, &remove_list, list)
if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
if (test_bit(IPOIB_MCAST_JOIN_STARTED, &mcast->flags))
wait_for_completion(&mcast->done);
list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
@ -837,6 +794,8 @@ void ipoib_mcast_restart_task(struct work_struct *work)
ipoib_dbg_mcast(priv, "restarting multicast task\n");
ipoib_mcast_stop_thread(dev, 0);
local_irq_save(flags);
netif_addr_lock(dev);
spin_lock(&priv->lock);
@ -921,38 +880,14 @@ void ipoib_mcast_restart_task(struct work_struct *work)
netif_addr_unlock(dev);
local_irq_restore(flags);
/*
* 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);
/*
* We have to cancel outside of the spinlock, but we have to
* take the rtnl lock or else we race with the removal of
* entries from the remove list in mcast_dev_flush as part
* of ipoib_stop(). We detect the drop of the ADMIN_UP flag
* to signal that we have hit this particular race, and we
* return since we know we don't need to do anything else
* anyway.
*/
while (!rtnl_trylock()) {
if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
return;
else
msleep(20);
}
/* 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);
}
/*
* Restart our join task if needed
*/
ipoib_mcast_start_thread(dev);
rtnl_unlock();
if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
ipoib_mcast_start_thread(dev);
}
#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG

22
drivers/infiniband/ulp/ipoib/ipoib_verbs.c
View file

@ -145,20 +145,10 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
int ret, size;
int i;
/*
* the various IPoIB tasks assume they will never race against
* themselves, so always use a single thread workqueue
*/
priv->wq = create_singlethread_workqueue("ipoib_wq");
if (!priv->wq) {
printk(KERN_WARNING "ipoib: failed to allocate device WQ\n");
return -ENODEV;
}
priv->pd = ib_alloc_pd(priv->ca);
if (IS_ERR(priv->pd)) {
printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
goto out_free_wq;
return -ENODEV;
}
priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
@ -252,10 +242,6 @@ out_free_mr:
out_free_pd:
ib_dealloc_pd(priv->pd);
out_free_wq:
destroy_workqueue(priv->wq);
priv->wq = NULL;
return -ENODEV;
}
@ -284,12 +270,6 @@ void ipoib_transport_dev_cleanup(struct net_device *dev)
if (ib_dealloc_pd(priv->pd))
ipoib_warn(priv, "ib_dealloc_pd failed\n");
if (priv->wq) {
flush_workqueue(priv->wq);
destroy_workqueue(priv->wq);
priv->wq = NULL;
}
}
void ipoib_event(struct ib_event_handler *handler,