From 1ac9ad1394fa542ac7ae0dc943ee3cda678799fa Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 12 Jan 2011 12:13:14 +0000 Subject: 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 Signed-off-by: Eric Dumazet CC: Jarek Poplawski CC: Alexander Duyck CC: Jeff Kirsher CC: Sandeep Gopalpet CC: Michal Nazarewicz Signed-off-by: David S. Miller --- net/core/dev.c | 29 ----------------------------- net/sched/sch_teql.c | 26 +++++++++++++++++++++----- 2 files changed, 21 insertions(+), 34 deletions(-) (limited to 'net') diff --git a/net/core/dev.c b/net/core/dev.c index a3ef808..83507c2 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5523,34 +5523,6 @@ void netdev_run_todo(void) } } -/** - * dev_txq_stats_fold - fold tx_queues stats - * @dev: device to get statistics from - * @stats: struct rtnl_link_stats64 to hold results - */ -void dev_txq_stats_fold(const struct net_device *dev, - struct rtnl_link_stats64 *stats) -{ - u64 tx_bytes = 0, tx_packets = 0, tx_dropped = 0; - unsigned int i; - struct netdev_queue *txq; - - for (i = 0; i < dev->num_tx_queues; i++) { - txq = netdev_get_tx_queue(dev, i); - spin_lock_bh(&txq->_xmit_lock); - tx_bytes += txq->tx_bytes; - tx_packets += txq->tx_packets; - tx_dropped += txq->tx_dropped; - spin_unlock_bh(&txq->_xmit_lock); - } - if (tx_bytes || tx_packets || tx_dropped) { - stats->tx_bytes = tx_bytes; - stats->tx_packets = tx_packets; - stats->tx_dropped = tx_dropped; - } -} -EXPORT_SYMBOL(dev_txq_stats_fold); - /* Convert net_device_stats to rtnl_link_stats64. They have the same * fields in the same order, with only the type differing. */ @@ -5594,7 +5566,6 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, netdev_stats_to_stats64(storage, ops->ndo_get_stats(dev)); } else { netdev_stats_to_stats64(storage, &dev->stats); - dev_txq_stats_fold(dev, storage); } storage->rx_dropped += atomic_long_read(&dev->rx_dropped); return storage; diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c index af9360d..84ce48e 100644 --- a/net/sched/sch_teql.c +++ b/net/sched/sch_teql.c @@ -59,6 +59,10 @@ struct teql_master struct net_device *dev; struct Qdisc *slaves; struct list_head master_list; + unsigned long tx_bytes; + unsigned long tx_packets; + unsigned long tx_errors; + unsigned long tx_dropped; }; struct teql_sched_data @@ -274,7 +278,6 @@ static inline int teql_resolve(struct sk_buff *skb, static netdev_tx_t teql_master_xmit(struct sk_buff *skb, struct net_device *dev) { struct teql_master *master = netdev_priv(dev); - struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); struct Qdisc *start, *q; int busy; int nores; @@ -314,8 +317,8 @@ restart: __netif_tx_unlock(slave_txq); master->slaves = NEXT_SLAVE(q); netif_wake_queue(dev); - txq->tx_packets++; - txq->tx_bytes += length; + master->tx_packets++; + master->tx_bytes += length; return NETDEV_TX_OK; } __netif_tx_unlock(slave_txq); @@ -342,10 +345,10 @@ restart: netif_stop_queue(dev); return NETDEV_TX_BUSY; } - dev->stats.tx_errors++; + master->tx_errors++; drop: - txq->tx_dropped++; + master->tx_dropped++; dev_kfree_skb(skb); return NETDEV_TX_OK; } @@ -398,6 +401,18 @@ static int teql_master_close(struct net_device *dev) return 0; } +static struct rtnl_link_stats64 *teql_master_stats64(struct net_device *dev, + struct rtnl_link_stats64 *stats) +{ + struct teql_master *m = netdev_priv(dev); + + stats->tx_packets = m->tx_packets; + stats->tx_bytes = m->tx_bytes; + stats->tx_errors = m->tx_errors; + stats->tx_dropped = m->tx_dropped; + return stats; +} + static int teql_master_mtu(struct net_device *dev, int new_mtu) { struct teql_master *m = netdev_priv(dev); @@ -422,6 +437,7 @@ static const struct net_device_ops teql_netdev_ops = { .ndo_open = teql_master_open, .ndo_stop = teql_master_close, .ndo_start_xmit = teql_master_xmit, + .ndo_get_stats64 = teql_master_stats64, .ndo_change_mtu = teql_master_mtu, }; -- cgit v1.1