diff mbox series

[PATCHv3,net-next,10/14] net: sch: api: add extack support in qdisc_alloc

Message ID 20171218224513.29836-11-aring@mojatatu.com
State Changes Requested, archived
Delegated to: David Miller
Headers show
Series net: sched: sch: introduce extack support | expand

Commit Message

Alexander Aring Dec. 18, 2017, 10:45 p.m. UTC 
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>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
---
 include/net/sch_generic.h | 3 ++-
 net/sched/sch_api.c       | 2 +-
 net/sched/sch_generic.c   | 6 ++++--
 3 files changed, 7 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 2ea04863ea34..1dbfbec00050 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -470,7 +470,8 @@  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,
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index a58459569f35..fd3960ff0fe4 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1050,7 +1050,7 @@  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 5cdafe88b902..01457b27d36e 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -749,7 +749,8 @@  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;
@@ -758,6 +759,7 @@  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;
 	}
@@ -829,7 +831,7 @@  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;