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authorEric Dumazet <eric.dumazet@gmail.com>2010-06-02 14:23:51 +0400
committerDavid S. Miller <davem@davemloft.net>2010-06-02 14:23:51 +0400
commitbc135b23d01acf7ee926aaf75b0020c86d3869f9 (patch)
tree29b338a0c54c00880720d808f2fede7c605f516d
parent9f26f547a587ce9015ffe495d2af604580b4b784 (diff)
downloadlinux-bc135b23d01acf7ee926aaf75b0020c86d3869f9.tar.xz
net: Define accessors to manipulate QDISC_STATE_RUNNING
Define three helpers to manipulate QDISC_STATE_RUNNIG flag, that a second patch will move on another location. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/pkt_sched.h2
-rw-r--r--include/net/sch_generic.h15
-rw-r--r--net/core/dev.c4
-rw-r--r--net/sched/sch_generic.c4
4 files changed, 20 insertions, 5 deletions
diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 9d4d87cc970e..d9549af6929a 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -95,7 +95,7 @@ extern void __qdisc_run(struct Qdisc *q);
static inline void qdisc_run(struct Qdisc *q)
{
- if (!test_and_set_bit(__QDISC_STATE_RUNNING, &q->state))
+ if (qdisc_run_begin(q))
__qdisc_run(q);
}
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 03ca5d826757..9707daed761e 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -76,6 +76,21 @@ struct Qdisc {
struct rcu_head rcu_head;
};
+static inline bool qdisc_is_running(struct Qdisc *qdisc)
+{
+ return test_bit(__QDISC_STATE_RUNNING, &qdisc->state);
+}
+
+static inline bool qdisc_run_begin(struct Qdisc *qdisc)
+{
+ return !test_and_set_bit(__QDISC_STATE_RUNNING, &qdisc->state);
+}
+
+static inline void qdisc_run_end(struct Qdisc *qdisc)
+{
+ clear_bit(__QDISC_STATE_RUNNING, &qdisc->state);
+}
+
struct Qdisc_class_ops {
/* Child qdisc manipulation */
struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *);
diff --git a/net/core/dev.c b/net/core/dev.c
index 983a3c1d65c4..2733226d90b2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2047,7 +2047,7 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
kfree_skb(skb);
rc = NET_XMIT_DROP;
} else if ((q->flags & TCQ_F_CAN_BYPASS) && !qdisc_qlen(q) &&
- !test_and_set_bit(__QDISC_STATE_RUNNING, &q->state)) {
+ qdisc_run_begin(q)) {
/*
* This is a work-conserving queue; there are no old skbs
* waiting to be sent out; and the qdisc is not running -
@@ -2059,7 +2059,7 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
if (sch_direct_xmit(skb, q, dev, txq, root_lock))
__qdisc_run(q);
else
- clear_bit(__QDISC_STATE_RUNNING, &q->state);
+ qdisc_run_end(q);
rc = NET_XMIT_SUCCESS;
} else {
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index bd1892fe4b21..37b86eab6779 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -205,7 +205,7 @@ void __qdisc_run(struct Qdisc *q)
}
}
- clear_bit(__QDISC_STATE_RUNNING, &q->state);
+ qdisc_run_end(q);
}
unsigned long dev_trans_start(struct net_device *dev)
@@ -797,7 +797,7 @@ static bool some_qdisc_is_busy(struct net_device *dev)
spin_lock_bh(root_lock);
- val = (test_bit(__QDISC_STATE_RUNNING, &q->state) ||
+ val = (qdisc_is_running(q) ||
test_bit(__QDISC_STATE_SCHED, &q->state));
spin_unlock_bh(root_lock);