diff options
| author | Petr Machata <petrm@mellanox.com> | 2020-06-27 01:45:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-29 17:08:28 -0700 |
| commit | aebe4426ccaa4838f36ea805cdf7d76503e65117 (patch) | |
| tree | 2086a44d7f134b47c8817e68fc67f1e1d1fbc9ba /net/sched/sch_hfsc.c | |
| parent | 5e701e49b7b40166cc56f7b0db205355095cad6b (diff) | |
| download | lwn-aebe4426ccaa4838f36ea805cdf7d76503e65117.tar.gz lwn-aebe4426ccaa4838f36ea805cdf7d76503e65117.zip | |
net: sched: Pass root lock to Qdisc_ops.enqueue
A following patch introduces qevents, points in qdisc algorithm where
packet can be processed by user-defined filters. Should this processing
lead to a situation where a new packet is to be enqueued on the same port,
holding the root lock would lead to deadlocks. To solve the issue, qevent
handler needs to unlock and relock the root lock when necessary.
To that end, add the root lock argument to the qdisc op enqueue, and
propagate throughout.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_hfsc.c')
| -rw-r--r-- | net/sched/sch_hfsc.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c index 433f2190960f..7f6670044f0a 100644 --- a/net/sched/sch_hfsc.c +++ b/net/sched/sch_hfsc.c @@ -1528,8 +1528,8 @@ hfsc_dump_qdisc(struct Qdisc *sch, struct sk_buff *skb) return -1; } -static int -hfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff **to_free) +static int hfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch, spinlock_t *root_lock, + struct sk_buff **to_free) { unsigned int len = qdisc_pkt_len(skb); struct hfsc_class *cl; @@ -1545,7 +1545,7 @@ hfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff **to_free) } first = !cl->qdisc->q.qlen; - err = qdisc_enqueue(skb, cl->qdisc, to_free); + err = qdisc_enqueue(skb, cl->qdisc, root_lock, to_free); if (unlikely(err != NET_XMIT_SUCCESS)) { if (net_xmit_drop_count(err)) { cl->qstats.drops++; |