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net_sched: add tracepoints for qdisc_reset() and qdisc_destroy()

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Add two tracepoints for qdisc_reset() and qdisc_destroy() to track
qdisc resetting and destroying.

Sample output:

  tc-756   [000] ...3   138.355662: qdisc_reset: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0
  tc-756   [000] ...1   138.355720: qdisc_reset: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0
  tc-756   [000] ...1   138.355867: qdisc_reset: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0
  tc-756   [000] ...1   138.355930: qdisc_destroy: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0
  tc-757   [000] ...2   143.073780: qdisc_reset: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0
  tc-757   [000] ...1   143.073878: qdisc_reset: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0
  tc-757   [000] ...1   143.074114: qdisc_reset: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0
  tc-757   [000] ...1   143.074228: qdisc_destroy: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang
2020-05-26 21:35:24 -07:00
committed by David S. Miller
parent 4909daba37
commit a34dac0b90
2 changed files with 56 additions and 0 deletions
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4
net/sched/sch_generic.c
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@@ -911,6 +911,8 @@ void qdisc_reset(struct Qdisc *qdisc)
const struct Qdisc_ops *ops = qdisc->ops;
struct sk_buff *skb, *tmp;
trace_qdisc_reset(qdisc);
if (ops->reset)
ops->reset(qdisc);
@@ -965,6 +967,8 @@ static void qdisc_destroy(struct Qdisc *qdisc)
module_put(ops->owner);
dev_put(qdisc_dev(qdisc));
trace_qdisc_destroy(qdisc);
call_rcu(&qdisc->rcu, qdisc_free_cb);
}