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| author | Michael S. Tsirkin <mst@mellanox.co.il> | 2006-01-17 12:19:40 -0800 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-01-17 12:19:40 -0800 |
| commit | b36f170b617a7cd147b694dabf504e856a50ee9d (patch) | |
| tree | 538606cc821b415447d5db710d76ef2272a75934 | |
| parent | 0f47ae0b3ec35dc5f4723f2e0ad0f6f3f55e9bcd (diff) | |
| download | kernel-crypto-b36f170b617a7cd147b694dabf504e856a50ee9d.tar.gz kernel-crypto-b36f170b617a7cd147b694dabf504e856a50ee9d.tar.xz kernel-crypto-b36f170b617a7cd147b694dabf504e856a50ee9d.zip | |
IPoIB: Lock accesses to multicast packet queues
Avoid corrupting mcast->pkt_queue by serializing access with
priv->tx_lock. Also, update dropped packet statistics to count
multicast packets removed from pkt_queue as dropped.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index 98039da0caf..ccaa0c38707 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -97,6 +97,7 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast) 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", @@ -123,8 +124,14 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast) if (mcast->ah) ipoib_put_ah(mcast->ah); - while (!skb_queue_empty(&mcast->pkt_queue)) + 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); } @@ -276,8 +283,10 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, } /* 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; @@ -288,7 +297,9 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, 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; } @@ -300,6 +311,7 @@ ipoib_mcast_sendonly_join_complete(int status, { 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); @@ -310,8 +322,12 @@ ipoib_mcast_sendonly_join_complete(int status, IPOIB_GID_ARG(mcast->mcmember.mgid), status); /* Flush out any queued packets */ - while (!skb_queue_empty(&mcast->pkt_queue)) + 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); @@ -687,6 +703,7 @@ void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, if (!mcast) { ipoib_warn(priv, "unable to allocate memory for " "multicast structure\n"); + ++priv->stats.tx_dropped; dev_kfree_skb_any(skb); goto out; } @@ -700,8 +717,10 @@ void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, if (!mcast->ah) { if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) skb_queue_tail(&mcast->pkt_queue, skb); - else + else { + ++priv->stats.tx_dropped; dev_kfree_skb_any(skb); + } if (mcast->query) ipoib_dbg_mcast(priv, "no address vector, " |