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net: sched: add an offload dump helper

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Qdisc dump operation of offload-capable qdiscs performs a few
extra steps which are identical among all the qdiscs.  Add
a helper to share this code.

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 2018-11-07 17:33:34 -08:00 • committed by David S. Miller
parent 80b6265c0f
commit b592843c67
4 changed files with 35 additions and 31 deletions
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21
net/sched/sch_api.c
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@ -810,6 +810,27 @@ void qdisc_tree_reduce_backlog(struct Qdisc *sch, unsigned int n,
}
EXPORT_SYMBOL(qdisc_tree_reduce_backlog);
int qdisc_offload_dump_helper(struct Qdisc *sch, enum tc_setup_type type,
void *type_data)
{
struct net_device *dev = qdisc_dev(sch);
int err;
sch->flags &= ~TCQ_F_OFFLOADED;
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
return 0;
err = dev->netdev_ops->ndo_setup_tc(dev, type, type_data);
if (err == -EOPNOTSUPP)
return 0;
if (!err)
sch->flags |= TCQ_F_OFFLOADED;
return err;
}
EXPORT_SYMBOL(qdisc_offload_dump_helper);
static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
u32 portid, u32 seq, u16 flags, int event)
{