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| 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_cbs.c | |
| parent | 5e701e49b7b40166cc56f7b0db205355095cad6b (diff) | |
| download | linux-aebe4426ccaa4838f36ea805cdf7d76503e65117.tar.gz linux-aebe4426ccaa4838f36ea805cdf7d76503e65117.tar.bz2 linux-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_cbs.c')
| -rw-r--r-- | net/sched/sch_cbs.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/net/sched/sch_cbs.c b/net/sched/sch_cbs.c index 2eaac2ff380f..7af15ebe07f7 100644 --- a/net/sched/sch_cbs.c +++ b/net/sched/sch_cbs.c @@ -77,7 +77,7 @@ struct cbs_sched_data { s64 sendslope; /* in bytes/s */ s64 idleslope; /* in bytes/s */ struct qdisc_watchdog watchdog; - int (*enqueue)(struct sk_buff *skb, struct Qdisc *sch, + int (*enqueue)(struct sk_buff *skb, struct Qdisc *sch, spinlock_t *root_lock, struct sk_buff **to_free); struct sk_buff *(*dequeue)(struct Qdisc *sch); struct Qdisc *qdisc; @@ -85,13 +85,13 @@ struct cbs_sched_data { }; static int cbs_child_enqueue(struct sk_buff *skb, struct Qdisc *sch, - struct Qdisc *child, + struct Qdisc *child, spinlock_t *root_lock, struct sk_buff **to_free) { unsigned int len = qdisc_pkt_len(skb); int err; - err = child->ops->enqueue(skb, child, to_free); + err = child->ops->enqueue(skb, child, root_lock, to_free); if (err != NET_XMIT_SUCCESS) return err; @@ -101,16 +101,16 @@ static int cbs_child_enqueue(struct sk_buff *skb, struct Qdisc *sch, return NET_XMIT_SUCCESS; } -static int cbs_enqueue_offload(struct sk_buff *skb, struct Qdisc *sch, +static int cbs_enqueue_offload(struct sk_buff *skb, struct Qdisc *sch, spinlock_t *root_lock, struct sk_buff **to_free) { struct cbs_sched_data *q = qdisc_priv(sch); struct Qdisc *qdisc = q->qdisc; - return cbs_child_enqueue(skb, sch, qdisc, to_free); + return cbs_child_enqueue(skb, sch, qdisc, root_lock, to_free); } -static int cbs_enqueue_soft(struct sk_buff *skb, struct Qdisc *sch, +static int cbs_enqueue_soft(struct sk_buff *skb, struct Qdisc *sch, spinlock_t *root_lock, struct sk_buff **to_free) { struct cbs_sched_data *q = qdisc_priv(sch); @@ -124,15 +124,15 @@ static int cbs_enqueue_soft(struct sk_buff *skb, struct Qdisc *sch, q->last = ktime_get_ns(); } - return cbs_child_enqueue(skb, sch, qdisc, to_free); + return cbs_child_enqueue(skb, sch, qdisc, root_lock, to_free); } -static int cbs_enqueue(struct sk_buff *skb, struct Qdisc *sch, +static int cbs_enqueue(struct sk_buff *skb, struct Qdisc *sch, spinlock_t *root_lock, struct sk_buff **to_free) { struct cbs_sched_data *q = qdisc_priv(sch); - return q->enqueue(skb, sch, to_free); + return q->enqueue(skb, sch, root_lock, to_free); } /* timediff is in ns, slope is in bytes/s */ |