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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>
This commit is contained in:
Alexander Aring 2017-12-20 12:35:20 -05:00 committed by David S. Miller
parent 8d1a77f974
commit d0bd684ddd
3 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/sch_generic.h
View File

@ -471,7 +471,8 @@ void qdisc_destroy(struct Qdisc *qdisc);
void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n,
unsigned int len);
struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
const struct Qdisc_ops *ops);
const struct Qdisc_ops *ops,
struct netlink_ext_ack *extack);
struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
const struct Qdisc_ops *ops, u32 parentid);
void __qdisc_calculate_pkt_len(struct sk_buff *skb,

2
net/sched/sch_api.c
View File

@ -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;

6
net/sched/sch_generic.c
View File

@ -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;