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net: sched: mq: offload a graft notification 

Drivers offloading Qdiscs should have reasonable certainty
the offloaded behaviour matches the SW path.  This is impossible
if the driver does not know about all Qdiscs or when Qdiscs move
and are reused.  Send a graft notification from MQ.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2018-11-12 14:58:14 -08:00 committed by David S. Miller
parent bf2a752bea
commit d577a3d279
2 changed files with 19 additions and 1 deletions
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11
include/net/pkt_cls.h
View File

@ -821,12 +821,21 @@ enum tc_mq_command {
TC_MQ_CREATE,
TC_MQ_DESTROY,
TC_MQ_STATS,
TC_MQ_GRAFT,
};
struct tc_mq_opt_offload_graft_params {
unsigned long queue;
u32 child_handle;
};
struct tc_mq_qopt_offload {
enum tc_mq_command command;
u32 handle;
struct tc_qopt_offload_stats stats;
union {
struct tc_qopt_offload_stats stats;
struct tc_mq_opt_offload_graft_params graft_params;
};
};
enum tc_red_command {

9
net/sched/sch_mq.c
View File

@ -193,6 +193,7 @@ static int mq_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new,
struct Qdisc **old, struct netlink_ext_ack *extack)
{
struct netdev_queue *dev_queue = mq_queue_get(sch, cl);
struct tc_mq_qopt_offload graft_offload;
struct net_device *dev = qdisc_dev(sch);
if (dev->flags & IFF_UP)
@ -203,6 +204,14 @@ static int mq_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new,
new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
if (dev->flags & IFF_UP)
dev_activate(dev);
graft_offload.handle = sch->handle;
graft_offload.graft_params.queue = cl - 1;
graft_offload.graft_params.child_handle = new ? new->handle : 0;
graft_offload.command = TC_MQ_GRAFT;
qdisc_offload_graft_helper(qdisc_dev(sch), sch, new, *old,
TC_SETUP_QDISC_MQ, &graft_offload, extack);
return 0;
}