[PATCH net-next 15/17] net: sched: add flags to Qdisc class ops struct

[Vlad Buslov]

Extend Qdisc_class_ops with flags. Create enum to hold possible class ops
flag values. Add first class ops flags value QDISC_CLASS_OPS_DOIT_UNLOCKED
to indicate that class ops functions can be called without taking rtnl
lock.

Signed-off-by: Vlad Buslov <vla...@mellanox.com>
Acked-by: Jiri Pirko <j...@mellanox.com>
---
 include/net/sch_generic.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 7b158d6fae85..c97300f5ea5c 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -175,6 +175,7 @@ static inline int qdisc_avail_bulklimit(const struct 
netdev_queue *txq)
 }
 
 struct Qdisc_class_ops {
+       unsigned int            flags;
        /* Child qdisc manipulation */
        struct netdev_queue *   (*select_queue)(struct Qdisc *, struct tcmsg *);
        int                     (*graft)(struct Qdisc *, unsigned long cl,
@@ -206,6 +207,13 @@ struct Qdisc_class_ops {
                                        struct gnet_dump *);
 };
 
+/* Qdisc_class_ops flag values */
+
+/* Implements API that doesn't require rtnl lock */
+enum qdisc_class_ops_flags {
+       QDISC_CLASS_OPS_DOIT_UNLOCKED = 1,
+};
+
 struct Qdisc_ops {
        struct Qdisc_ops        *next;
        const struct Qdisc_class_ops    *cl_ops;
-- 
2.7.5