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Commit 102396ae authored Aug 29, 2008 by Jarek Poplawski Committed by David S. Miller Aug 29, 2008

pkt_sched: Fix locking of qdisc_root with qdisc_root_sleeping_lock()



Use qdisc_root_sleeping_lock() instead of qdisc_root_lock() where
appropriate. The only difference is while dev is deactivated, when
currently we can use a sleeping qdisc with the lock of noop_qdisc.
This shouldn't be dangerous since after deactivation root lock could
be used only by gen_estimator code, but looks wrong anyway.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 3cc76caa

net/sched/cls_api.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -205,7 +205,7 @@ replay:
	}		}
	}		}

	root_lock = qdisc_root_lock(q);		root_lock = qdisc_root_sleeping_lock(q);

	if (tp == NULL) {		if (tp == NULL) {
	/* Proto-tcf does not exist, create new one */		/* Proto-tcf does not exist, create new one */

net/sched/cls_route.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -75,7 +75,7 @@ static __inline__ int route4_fastmap_hash(u32 id, int iif)
	static inline		static inline
	void route4_reset_fastmap(struct Qdisc q, struct route4_head head, u32 id)		void route4_reset_fastmap(struct Qdisc q, struct route4_head head, u32 id)
	{		{
	spinlock_t *root_lock = qdisc_root_lock(q);		spinlock_t *root_lock = qdisc_root_sleeping_lock(q);

	spin_lock_bh(root_lock);		spin_lock_bh(root_lock);
	memset(head->fastmap, 0, sizeof(head->fastmap));		memset(head->fastmap, 0, sizeof(head->fastmap));

net/sched/sch_api.c

+4 −4

Original line number	Original line	Diff line number	Diff line
	@@ -1169,8 +1169,8 @@ static int tc_fill_qdisc(struct sk_buff skb, struct Qdisc q, u32 clid,
	if (q->stab && qdisc_dump_stab(skb, q->stab) < 0)		if (q->stab && qdisc_dump_stab(skb, q->stab) < 0)
	goto nla_put_failure;		goto nla_put_failure;

	if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,		if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
	TCA_XSTATS, qdisc_root_lock(q), &d) < 0)		qdisc_root_sleeping_lock(q), &d) < 0)
	goto nla_put_failure;		goto nla_put_failure;

	if (q->ops->dump_stats && q->ops->dump_stats(q, &d) < 0)		if (q->ops->dump_stats && q->ops->dump_stats(q, &d) < 0)
	@@ -1461,8 +1461,8 @@ static int tc_fill_tclass(struct sk_buff skb, struct Qdisc q,
	if (cl_ops->dump && cl_ops->dump(q, cl, skb, tcm) < 0)		if (cl_ops->dump && cl_ops->dump(q, cl, skb, tcm) < 0)
	goto nla_put_failure;		goto nla_put_failure;

	if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,		if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
	TCA_XSTATS, qdisc_root_lock(q), &d) < 0)		qdisc_root_sleeping_lock(q), &d) < 0)
	goto nla_put_failure;		goto nla_put_failure;

	if (cl_ops->dump_stats && cl_ops->dump_stats(q, cl, &d) < 0)		if (cl_ops->dump_stats && cl_ops->dump_stats(q, cl, &d) < 0)

net/sched/sch_cbq.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1754,7 +1754,7 @@ static void cbq_put(struct Qdisc *sch, unsigned long arg)

	if (--cl->refcnt == 0) {		if (--cl->refcnt == 0) {
	#ifdef CONFIG_NET_CLS_ACT		#ifdef CONFIG_NET_CLS_ACT
	spinlock_t *root_lock = qdisc_root_lock(sch);		spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
	struct cbq_sched_data *q = qdisc_priv(sch);		struct cbq_sched_data *q = qdisc_priv(sch);

	spin_lock_bh(root_lock);		spin_lock_bh(root_lock);

net/sched/sch_htb.c

+2 −2

Original line number	Original line	Diff line number	Diff line
	@@ -1043,7 +1043,7 @@ static int htb_init(struct Qdisc sch, struct nlattr opt)

	static int htb_dump(struct Qdisc sch, struct sk_buff skb)		static int htb_dump(struct Qdisc sch, struct sk_buff skb)
	{		{
	spinlock_t *root_lock = qdisc_root_lock(sch);		spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
	struct htb_sched *q = qdisc_priv(sch);		struct htb_sched *q = qdisc_priv(sch);
	struct nlattr *nest;		struct nlattr *nest;
	struct tc_htb_glob gopt;		struct tc_htb_glob gopt;
	@@ -1075,7 +1075,7 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
	struct sk_buff skb, struct tcmsg tcm)		struct sk_buff skb, struct tcmsg tcm)
	{		{
	struct htb_class cl = (struct htb_class )arg;		struct htb_class cl = (struct htb_class )arg;
	spinlock_t *root_lock = qdisc_root_lock(sch);		spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
	struct nlattr *nest;		struct nlattr *nest;
	struct tc_htb_opt opt;		struct tc_htb_opt opt;

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