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authorTom Herbert <therbert@google.com>2011-11-28 16:32:44 +0000
committerDavid S. Miller <davem@davemloft.net>2011-11-29 12:46:19 -0500
commit7346649826382b769cfadf4a2fe8a84d060c55e9 (patch)
tree0241cce453992881f61d3fbc4f9baf7eb0578135 /net
parent75957ba36c05b979701e9ec64b37819adc12f830 (diff)
downloadop-kernel-dev-7346649826382b769cfadf4a2fe8a84d060c55e9.zip
op-kernel-dev-7346649826382b769cfadf4a2fe8a84d060c55e9.tar.gz
net: Add queue state xoff flag for stack
Create separate queue state flags so that either the stack or drivers can turn on XOFF. Added a set of functions used in the stack to determine if a queue is really stopped (either by stack or driver) Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c4
-rw-r--r--net/core/netpoll.c4
-rw-r--r--net/core/pktgen.c2
-rw-r--r--net/sched/sch_generic.c8
-rw-r--r--net/sched/sch_multiq.c6
-rw-r--r--net/sched/sch_teql.c6
6 files changed, 16 insertions, 14 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index c7ef6c5..cb8f753 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2270,7 +2270,7 @@ gso:
return rc;
}
txq_trans_update(txq);
- if (unlikely(netif_tx_queue_stopped(txq) && skb->next))
+ if (unlikely(netif_xmit_stopped(txq) && skb->next))
return NETDEV_TX_BUSY;
} while (skb->next);
@@ -2558,7 +2558,7 @@ int dev_queue_xmit(struct sk_buff *skb)
HARD_TX_LOCK(dev, txq, cpu);
- if (!netif_tx_queue_stopped(txq)) {
+ if (!netif_xmit_stopped(txq)) {
__this_cpu_inc(xmit_recursion);
rc = dev_hard_start_xmit(skb, dev, txq);
__this_cpu_dec(xmit_recursion);
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 1a7d8e2..0d38808 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -76,7 +76,7 @@ static void queue_process(struct work_struct *work)
local_irq_save(flags);
__netif_tx_lock(txq, smp_processor_id());
- if (netif_tx_queue_frozen_or_stopped(txq) ||
+ if (netif_xmit_frozen_or_stopped(txq) ||
ops->ndo_start_xmit(skb, dev) != NETDEV_TX_OK) {
skb_queue_head(&npinfo->txq, skb);
__netif_tx_unlock(txq);
@@ -317,7 +317,7 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;
tries > 0; --tries) {
if (__netif_tx_trylock(txq)) {
- if (!netif_tx_queue_stopped(txq)) {
+ if (!netif_xmit_stopped(txq)) {
status = ops->ndo_start_xmit(skb, dev);
if (status == NETDEV_TX_OK)
txq_trans_update(txq);
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index aa53a35..449fe0f 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3342,7 +3342,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
__netif_tx_lock_bh(txq);
- if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) {
+ if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
ret = NETDEV_TX_BUSY;
pkt_dev->last_ok = 0;
goto unlock;
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 79ac145..67fc573 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -60,7 +60,7 @@ static inline struct sk_buff *dequeue_skb(struct Qdisc *q)
/* check the reason of requeuing without tx lock first */
txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
- if (!netif_tx_queue_frozen_or_stopped(txq)) {
+ if (!netif_xmit_frozen_or_stopped(txq)) {
q->gso_skb = NULL;
q->q.qlen--;
} else
@@ -121,7 +121,7 @@ int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
spin_unlock(root_lock);
HARD_TX_LOCK(dev, txq, smp_processor_id());
- if (!netif_tx_queue_frozen_or_stopped(txq))
+ if (!netif_xmit_frozen_or_stopped(txq))
ret = dev_hard_start_xmit(skb, dev, txq);
HARD_TX_UNLOCK(dev, txq);
@@ -143,7 +143,7 @@ int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
ret = dev_requeue_skb(skb, q);
}
- if (ret && netif_tx_queue_frozen_or_stopped(txq))
+ if (ret && netif_xmit_frozen_or_stopped(txq))
ret = 0;
return ret;
@@ -242,7 +242,7 @@ static void dev_watchdog(unsigned long arg)
* old device drivers set dev->trans_start
*/
trans_start = txq->trans_start ? : dev->trans_start;
- if (netif_tx_queue_stopped(txq) &&
+ if (netif_xmit_stopped(txq) &&
time_after(jiffies, (trans_start +
dev->watchdog_timeo))) {
some_queue_timedout = 1;
diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c
index edc1950..49131d7 100644
--- a/net/sched/sch_multiq.c
+++ b/net/sched/sch_multiq.c
@@ -107,7 +107,8 @@ static struct sk_buff *multiq_dequeue(struct Qdisc *sch)
/* Check that target subqueue is available before
* pulling an skb to avoid head-of-line blocking.
*/
- if (!__netif_subqueue_stopped(qdisc_dev(sch), q->curband)) {
+ if (!netif_xmit_stopped(
+ netdev_get_tx_queue(qdisc_dev(sch), q->curband))) {
qdisc = q->queues[q->curband];
skb = qdisc->dequeue(qdisc);
if (skb) {
@@ -138,7 +139,8 @@ static struct sk_buff *multiq_peek(struct Qdisc *sch)
/* Check that target subqueue is available before
* pulling an skb to avoid head-of-line blocking.
*/
- if (!__netif_subqueue_stopped(qdisc_dev(sch), curband)) {
+ if (!netif_xmit_stopped(
+ netdev_get_tx_queue(qdisc_dev(sch), curband))) {
qdisc = q->queues[curband];
skb = qdisc->ops->peek(qdisc);
if (skb)
diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c
index a3b7120..283bfe3 100644
--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -301,7 +301,7 @@ restart:
if (slave_txq->qdisc_sleeping != q)
continue;
- if (__netif_subqueue_stopped(slave, subq) ||
+ if (netif_xmit_stopped(netdev_get_tx_queue(slave, subq)) ||
!netif_running(slave)) {
busy = 1;
continue;
@@ -312,7 +312,7 @@ restart:
if (__netif_tx_trylock(slave_txq)) {
unsigned int length = qdisc_pkt_len(skb);
- if (!netif_tx_queue_frozen_or_stopped(slave_txq) &&
+ if (!netif_xmit_frozen_or_stopped(slave_txq) &&
slave_ops->ndo_start_xmit(skb, slave) == NETDEV_TX_OK) {
txq_trans_update(slave_txq);
__netif_tx_unlock(slave_txq);
@@ -324,7 +324,7 @@ restart:
}
__netif_tx_unlock(slave_txq);
}
- if (netif_queue_stopped(dev))
+ if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)))
busy = 1;
break;
case 1:
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