net: sch: api: add extack support in qdisc_alloc
This patch adds extack support for the function qdisc_alloc which is
a common used function in the tc subsystem. Callers which are interested
in the receiving error can assign extack to get a more detailed
information why qdisc_alloc failed.
Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 79a9fdf947..3a3a1da 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1052,7 +1052,7 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
goto err_out;
}
- sch = qdisc_alloc(dev_queue, ops);
+ sch = qdisc_alloc(dev_queue, ops, extack);
if (IS_ERR(sch)) {
err = PTR_ERR(sch);
goto err_out2;
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 30bc38c..34ef436 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -755,7 +755,8 @@ static struct lock_class_key qdisc_tx_busylock;
static struct lock_class_key qdisc_running_key;
struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
- const struct Qdisc_ops *ops)
+ const struct Qdisc_ops *ops,
+ struct netlink_ext_ack *extack)
{
void *p;
struct Qdisc *sch;
@@ -764,6 +765,7 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
struct net_device *dev;
if (!dev_queue) {
+ NL_SET_ERR_MSG(extack, "No device queue given");
err = -EINVAL;
goto errout;
}
@@ -835,7 +837,7 @@ struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
if (!try_module_get(ops->owner))
return NULL;
- sch = qdisc_alloc(dev_queue, ops);
+ sch = qdisc_alloc(dev_queue, ops, NULL);
if (IS_ERR(sch)) {
module_put(ops->owner);
return NULL;
