diff options
| author |   Paolo Abeni <pabeni@redhat.com> | 2019-03-28 16:53:13 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-04-01 14:50:13 -0700 |
| commit | e5f0e8f8e456589d56e4955154ed5d468cd6d286 (patch) | |
| tree | 394e064316a0965588c3784a36a24fca3a7b352d /include | |
| parent | net: sched: introduce and use qstats read helpers (diff) | |
| download | wireguard-linux-e5f0e8f8e456589d56e4955154ed5d468cd6d286.tar.xz wireguard-linux-e5f0e8f8e456589d56e4955154ed5d468cd6d286.zip | |
net: sched: introduce and use qdisc tree flush/purge helpers
The same code to flush qdisc tree and purge the qdisc queue
is duplicated in many places and in most cases it does not
respect NOLOCK qdisc: the global backlog len is used and the
per CPU values are ignored.
This change addresses the above, factoring-out the relevant
code and using the helpers introduced by the previous patch
to fetch the correct backlog len.
Fixes: c5ad119fb6c0 ("net: sched: pfifo_fast use skb_array")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/sch_generic.h | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 43e4e17aa938..a2b38b3deeca 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -941,6 +941,23 @@ static inline void qdisc_qstats_qlen_backlog(struct Qdisc *sch, __u32 *qlen, *backlog = qstats.backlog; } +static inline void qdisc_tree_flush_backlog(struct Qdisc *sch) +{ + __u32 qlen, backlog; + + qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); + qdisc_tree_reduce_backlog(sch, qlen, backlog); +} + +static inline void qdisc_purge_queue(struct Qdisc *sch) +{ + __u32 qlen, backlog; + + qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); + qdisc_reset(sch); + qdisc_tree_reduce_backlog(sch, qlen, backlog); +} + static inline void qdisc_skb_head_init(struct qdisc_skb_head *qh) { qh->head = NULL; @@ -1124,13 +1141,8 @@ static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, sch_tree_lock(sch); old = *pold; *pold = new; - if (old != NULL) { - unsigned int qlen = old->q.qlen; - unsigned int backlog = old->qstats.backlog; - - qdisc_reset(old); - qdisc_tree_reduce_backlog(old, qlen, backlog); - } + if (old != NULL) + qdisc_tree_flush_backlog(old); sch_tree_unlock(sch); return old; |