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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2016-02-25 14:55:00 -0800 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-07-10 23:07:22 -0400 |
| commit | 11316d7eef2230000bb4fa3d4b9056690fda3ef2 (patch) | |
| tree | 17f7011b6ab7cef71b9766278b03c144acb60d20 /include | |
| parent | 7b6460337ed23f3b29958e853f7d1f191bfd844d (diff) | |
| download | lwn-11316d7eef2230000bb4fa3d4b9056690fda3ef2.tar.gz lwn-11316d7eef2230000bb4fa3d4b9056690fda3ef2.zip | |
net_sched: introduce qdisc_replace() helper
[ 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: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/sch_generic.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 080b657ef8fb..1fb8a5b42836 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -691,6 +691,23 @@ static inline void qdisc_reset_queue(struct Qdisc *sch) 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) { |