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authorEric Dumazet <eric.dumazet@gmail.com>2011-01-12 12:13:14 +0000
committerDavid S. Miller <davem@davemloft.net>2011-01-13 21:44:34 -0800
commit1ac9ad1394fa542ac7ae0dc943ee3cda678799fa (patch)
treed846be421ed68f4fc612ae7c061783dab73d5fa2 /drivers/net
parent1949e084bfd143c76e22c0b37f370d6e7bf4bfdd (diff)
net: remove dev_txq_stats_fold()
After recent changes, (percpu stats on vlan/tunnels...), we dont need anymore per struct netdev_queue tx_bytes/tx_packets/tx_dropped counters. Only remaining users are ixgbe, sch_teql, gianfar & macvlan : 1) ixgbe can be converted to use existing tx_ring counters. 2) macvlan incremented txq->tx_dropped, it can use the dev->stats.tx_dropped counter. 3) sch_teql : almost revert ab35cd4b8f42 (Use net_device internal stats) Now we have ndo_get_stats64(), use it, even for "unsigned long" fields (No need to bring back a struct net_device_stats) 4) gianfar adds a stats structure per tx queue to hold tx_bytes/tx_packets This removes a lockdep warning (and possible lockup) in rndis gadget, calling dev_get_stats() from hard IRQ context. Ref: http://www.spinics.net/lists/netdev/msg149202.html Reported-by: Neil Jones <neiljay@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Jarek Poplawski <jarkao2@gmail.com> CC: Alexander Duyck <alexander.h.duyck@intel.com> CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com> CC: Sandeep Gopalpet <sandeep.kumar@freescale.com> CC: Michal Nazarewicz <mina86@mina86.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/gianfar.c10
-rw-r--r--drivers/net/gianfar.h10
-rw-r--r--drivers/net/ixgbe/ixgbe_main.c23
-rw-r--r--drivers/net/macvtap.c2
4 files changed, 31 insertions, 14 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 45c4b7bfcf39..f1d4b450e797 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -433,7 +433,6 @@ static void gfar_init_mac(struct net_device *ndev)
static struct net_device_stats *gfar_get_stats(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
- struct netdev_queue *txq;
unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0;
unsigned long tx_packets = 0, tx_bytes = 0;
int i = 0;
@@ -449,9 +448,8 @@ static struct net_device_stats *gfar_get_stats(struct net_device *dev)
dev->stats.rx_dropped = rx_dropped;
for (i = 0; i < priv->num_tx_queues; i++) {
- txq = netdev_get_tx_queue(dev, i);
- tx_bytes += txq->tx_bytes;
- tx_packets += txq->tx_packets;
+ tx_bytes += priv->tx_queue[i]->stats.tx_bytes;
+ tx_packets += priv->tx_queue[i]->stats.tx_packets;
}
dev->stats.tx_bytes = tx_bytes;
@@ -2108,8 +2106,8 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
}
/* Update transmit stats */
- txq->tx_bytes += skb->len;
- txq->tx_packets ++;
+ tx_queue->stats.tx_bytes += skb->len;
+ tx_queue->stats.tx_packets++;
txbdp = txbdp_start = tx_queue->cur_tx;
lstatus = txbdp->lstatus;
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 68984eb88ae0..54de4135e932 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -907,12 +907,21 @@ enum {
MQ_MG_MODE
};
+/*
+ * Per TX queue stats
+ */
+struct tx_q_stats {
+ unsigned long tx_packets;
+ unsigned long tx_bytes;
+};
+
/**
* struct gfar_priv_tx_q - per tx queue structure
* @txlock: per queue tx spin lock
* @tx_skbuff:skb pointers
* @skb_curtx: to be used skb pointer
* @skb_dirtytx:the last used skb pointer
+ * @stats: bytes/packets stats
* @qindex: index of this queue
* @dev: back pointer to the dev structure
* @grp: back pointer to the group to which this queue belongs
@@ -934,6 +943,7 @@ struct gfar_priv_tx_q {
struct txbd8 *tx_bd_base;
struct txbd8 *cur_tx;
struct txbd8 *dirty_tx;
+ struct tx_q_stats stats;
struct net_device *dev;
struct gfar_priv_grp *grp;
u16 skb_curtx;
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index a060610a42db..602078b84892 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -6667,8 +6667,6 @@ netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
struct ixgbe_adapter *adapter,
struct ixgbe_ring *tx_ring)
{
- struct net_device *netdev = tx_ring->netdev;
- struct netdev_queue *txq;
unsigned int first;
unsigned int tx_flags = 0;
u8 hdr_len = 0;
@@ -6765,9 +6763,6 @@ netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
/* add the ATR filter if ATR is on */
if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
ixgbe_atr(tx_ring, skb, tx_flags, protocol);
- txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
- txq->tx_bytes += skb->len;
- txq->tx_packets++;
ixgbe_tx_queue(tx_ring, tx_flags, count, skb->len, hdr_len);
ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
@@ -6925,8 +6920,6 @@ static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
struct ixgbe_adapter *adapter = netdev_priv(netdev);
int i;
- /* accurate rx/tx bytes/packets stats */
- dev_txq_stats_fold(netdev, stats);
rcu_read_lock();
for (i = 0; i < adapter->num_rx_queues; i++) {
struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
@@ -6943,6 +6936,22 @@ static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
stats->rx_bytes += bytes;
}
}
+
+ for (i = 0; i < adapter->num_tx_queues; i++) {
+ struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
+ u64 bytes, packets;
+ unsigned int start;
+
+ if (ring) {
+ do {
+ start = u64_stats_fetch_begin_bh(&ring->syncp);
+ packets = ring->stats.packets;
+ bytes = ring->stats.bytes;
+ } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
+ stats->tx_packets += packets;
+ stats->tx_bytes += bytes;
+ }
+ }
rcu_read_unlock();
/* following stats updated by ixgbe_watchdog_task() */
stats->multicast = netdev->stats.multicast;
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 21845affea13..5933621ac3ff 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -585,7 +585,7 @@ err:
rcu_read_lock_bh();
vlan = rcu_dereference(q->vlan);
if (vlan)
- netdev_get_tx_queue(vlan->dev, 0)->tx_dropped++;
+ vlan->dev->stats.tx_dropped++;
rcu_read_unlock_bh();
return err;