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authorJarek Poplawski <jarkao2@gmail.com>2008-08-27 13:25:17 +0400
committerDavid S. Miller <davem@davemloft.net>2008-08-27 13:25:17 +0400
commitf6f9b93f1624206c802ac9162c9302edaf59bfd9 (patch)
tree643bd211bf909118311138e588a78834fad7a40d /include/net/sch_generic.h
parentf7a54c13c7b072d9426bd5cec1cdb8306df5ef55 (diff)
downloadlinux-f6f9b93f1624206c802ac9162c9302edaf59bfd9.tar.xz
pkt_sched: Fix gen_estimator locks
While passing a qdisc root lock to gen_new_estimator() and gen_replace_estimator() dev could be deactivated or even before grafting proper root qdisc as qdisc_sleeping (e.g. qdisc_create), so using qdisc_root_lock() is not enough. This patch adds qdisc_root_sleeping_lock() for this, plus additional checks, where necessary. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sch_generic.h')
-rw-r--r--include/net/sch_generic.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index b1d2cfea89c5..ef8a7e2e12e7 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -217,6 +217,14 @@ static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc)
return qdisc_lock(root);
}
+static inline spinlock_t *qdisc_root_sleeping_lock(struct Qdisc *qdisc)
+{
+ struct Qdisc *root = qdisc_root_sleeping(qdisc);
+
+ ASSERT_RTNL();
+ return qdisc_lock(root);
+}
+
static inline struct net_device *qdisc_dev(struct Qdisc *qdisc)
{
return qdisc->dev_queue->dev;