From: <gregkh@linuxfoundation.org>
To: xiyou.wangcong@gmail.com, davem@davemloft.net,
gregkh@linuxfoundation.org, jhs@mojatatu.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "net_sched: introduce qdisc_replace() helper" has been added to the 4.5-stable tree
Date: Mon, 16 May 2016 11:26:33 -0700 [thread overview]
Message-ID: <146342319322393@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
net_sched: introduce qdisc_replace() helper
to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net_sched-introduce-qdisc_replace-helper.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Mon May 16 11:20:33 PDT 2016
From: WANG Cong <xiyou.wangcong@gmail.com>
Date: Thu, 25 Feb 2016 14:55:00 -0800
Subject: net_sched: introduce qdisc_replace() helper
From: WANG Cong <xiyou.wangcong@gmail.com>
[ Upstream commit 86a7996cc8a078793670d82ed97d5a99bb4e8496 ]
Remove nearly duplicated code and prepare for the following patch.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/sch_generic.h | 17 +++++++++++++++++
net/sched/sch_cbq.c | 7 +------
net/sched/sch_drr.c | 6 +-----
net/sched/sch_dsmark.c | 8 +-------
net/sched/sch_hfsc.c | 6 +-----
net/sched/sch_htb.c | 9 +--------
net/sched/sch_multiq.c | 8 +-------
net/sched/sch_netem.c | 10 +---------
net/sched/sch_prio.c | 8 +-------
net/sched/sch_qfq.c | 6 +-----
net/sched/sch_red.c | 7 +------
net/sched/sch_sfb.c | 7 +------
net/sched/sch_tbf.c | 8 +-------
13 files changed, 29 insertions(+), 78 deletions(-)
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -707,6 +707,23 @@ static inline void qdisc_reset_queue(str
sch->qstats.backlog = 0;
}
+static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new,
+ struct Qdisc **pold)
+{
+ struct Qdisc *old;
+
+ sch_tree_lock(sch);
+ old = *pold;
+ *pold = new;
+ if (old != NULL) {
+ qdisc_tree_decrease_qlen(old, old->q.qlen);
+ qdisc_reset(old);
+ }
+ sch_tree_unlock(sch);
+
+ return old;
+}
+
static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
struct sk_buff_head *list)
{
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1624,13 +1624,8 @@ static int cbq_graft(struct Qdisc *sch,
new->reshape_fail = cbq_reshape_fail;
#endif
}
- sch_tree_lock(sch);
- *old = cl->q;
- cl->q = new;
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- sch_tree_unlock(sch);
+ *old = qdisc_replace(sch, new, &cl->q);
return 0;
}
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -226,11 +226,7 @@ static int drr_graft_class(struct Qdisc
new = &noop_qdisc;
}
- sch_tree_lock(sch);
- drr_purge_queue(cl);
- *old = cl->qdisc;
- cl->qdisc = new;
- sch_tree_unlock(sch);
+ *old = qdisc_replace(sch, new, &cl->qdisc);
return 0;
}
--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -73,13 +73,7 @@ static int dsmark_graft(struct Qdisc *sc
new = &noop_qdisc;
}
- sch_tree_lock(sch);
- *old = p->q;
- p->q = new;
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- sch_tree_unlock(sch);
-
+ *old = qdisc_replace(sch, new, &p->q);
return 0;
}
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1215,11 +1215,7 @@ hfsc_graft_class(struct Qdisc *sch, unsi
new = &noop_qdisc;
}
- sch_tree_lock(sch);
- hfsc_purge_queue(sch, cl);
- *old = cl->qdisc;
- cl->qdisc = new;
- sch_tree_unlock(sch);
+ *old = qdisc_replace(sch, new, &cl->qdisc);
return 0;
}
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1163,14 +1163,7 @@ static int htb_graft(struct Qdisc *sch,
cl->common.classid)) == NULL)
return -ENOBUFS;
- sch_tree_lock(sch);
- *old = cl->un.leaf.q;
- cl->un.leaf.q = new;
- if (*old != NULL) {
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- }
- sch_tree_unlock(sch);
+ *old = qdisc_replace(sch, new, &cl->un.leaf.q);
return 0;
}
--- a/net/sched/sch_multiq.c
+++ b/net/sched/sch_multiq.c
@@ -303,13 +303,7 @@ static int multiq_graft(struct Qdisc *sc
if (new == NULL)
new = &noop_qdisc;
- sch_tree_lock(sch);
- *old = q->queues[band];
- q->queues[band] = new;
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- sch_tree_unlock(sch);
-
+ *old = qdisc_replace(sch, new, &q->queues[band]);
return 0;
}
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -1037,15 +1037,7 @@ static int netem_graft(struct Qdisc *sch
{
struct netem_sched_data *q = qdisc_priv(sch);
- sch_tree_lock(sch);
- *old = q->qdisc;
- q->qdisc = new;
- if (*old) {
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- }
- sch_tree_unlock(sch);
-
+ *old = qdisc_replace(sch, new, &q->qdisc);
return 0;
}
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -268,13 +268,7 @@ static int prio_graft(struct Qdisc *sch,
if (new == NULL)
new = &noop_qdisc;
- sch_tree_lock(sch);
- *old = q->queues[band];
- q->queues[band] = new;
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- sch_tree_unlock(sch);
-
+ *old = qdisc_replace(sch, new, &q->queues[band]);
return 0;
}
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -617,11 +617,7 @@ static int qfq_graft_class(struct Qdisc
new = &noop_qdisc;
}
- sch_tree_lock(sch);
- qfq_purge_queue(cl);
- *old = cl->qdisc;
- cl->qdisc = new;
- sch_tree_unlock(sch);
+ *old = qdisc_replace(sch, new, &cl->qdisc);
return 0;
}
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -313,12 +313,7 @@ static int red_graft(struct Qdisc *sch,
if (new == NULL)
new = &noop_qdisc;
- sch_tree_lock(sch);
- *old = q->qdisc;
- q->qdisc = new;
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- sch_tree_unlock(sch);
+ *old = qdisc_replace(sch, new, &q->qdisc);
return 0;
}
--- a/net/sched/sch_sfb.c
+++ b/net/sched/sch_sfb.c
@@ -606,12 +606,7 @@ static int sfb_graft(struct Qdisc *sch,
if (new == NULL)
new = &noop_qdisc;
- sch_tree_lock(sch);
- *old = q->qdisc;
- q->qdisc = new;
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- sch_tree_unlock(sch);
+ *old = qdisc_replace(sch, new, &q->qdisc);
return 0;
}
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -502,13 +502,7 @@ static int tbf_graft(struct Qdisc *sch,
if (new == NULL)
new = &noop_qdisc;
- sch_tree_lock(sch);
- *old = q->qdisc;
- q->qdisc = new;
- qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
- qdisc_reset(*old);
- sch_tree_unlock(sch);
-
+ *old = qdisc_replace(sch, new, &q->qdisc);
return 0;
}
Patches currently in stable-queue which might be from xiyou.wangcong@gmail.com are
queue-4.5/sch_htb-update-backlog-as-well.patch
queue-4.5/sch_dsmark-update-backlog-as-well.patch
queue-4.5/net_sched-update-hierarchical-backlog-too.patch
queue-4.5/net_sched-introduce-qdisc_replace-helper.patch
reply other threads:[~2016-05-16 18:34 UTC|newest]
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