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net: sched: Make TBF Qdisc offloadable 

Invoke ndo_setup_tc as appropriate to signal init / replacement, destroying
and dumping of TBF Qdisc.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2020-01-24 15:23:06 +02:00 committed by David S. Miller
parent c207015274
commit ef6aadcc76
3 changed files with 78 additions and 0 deletions
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1
include/linux/netdevice.h
View File

@ -850,6 +850,7 @@ enum tc_setup_type {
TC_SETUP_QDISC_TAPRIO,
TC_SETUP_FT,
TC_SETUP_QDISC_ETS,
TC_SETUP_QDISC_TBF,
};
/* These structures hold the attributes of bpf state that are being passed

22
include/net/pkt_cls.h
View File

@ -854,4 +854,26 @@ struct tc_ets_qopt_offload {
};
};
enum tc_tbf_command {
TC_TBF_REPLACE,
TC_TBF_DESTROY,
TC_TBF_STATS,
};
struct tc_tbf_qopt_offload_replace_params {
struct psched_ratecfg rate;
u32 max_size;
struct gnet_stats_queue *qstats;
};
struct tc_tbf_qopt_offload {
enum tc_tbf_command command;
u32 handle;
u32 parent;
union {
struct tc_tbf_qopt_offload_replace_params replace_params;
struct tc_qopt_offload_stats stats;
};
};
#endif

55
net/sched/sch_tbf.c
View File

@ -15,6 +15,7 @@
#include <linux/skbuff.h>
#include <net/netlink.h>
#include <net/sch_generic.h>
#include <net/pkt_cls.h>
#include <net/pkt_sched.h>
@ -137,6 +138,52 @@ static u64 psched_ns_t2l(const struct psched_ratecfg *r,
return len;
}
static void tbf_offload_change(struct Qdisc *sch)
{
struct tbf_sched_data *q = qdisc_priv(sch);
struct net_device *dev = qdisc_dev(sch);
struct tc_tbf_qopt_offload qopt;
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
return;
qopt.command = TC_TBF_REPLACE;
qopt.handle = sch->handle;
qopt.parent = sch->parent;
qopt.replace_params.rate = q->rate;
qopt.replace_params.max_size = q->max_size;
qopt.replace_params.qstats = &sch->qstats;
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_TBF, &qopt);
}
static void tbf_offload_destroy(struct Qdisc *sch)
{
struct net_device *dev = qdisc_dev(sch);
struct tc_tbf_qopt_offload qopt;
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
return;
qopt.command = TC_TBF_DESTROY;
qopt.handle = sch->handle;
qopt.parent = sch->parent;
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_TBF, &qopt);
}
static int tbf_offload_dump(struct Qdisc *sch)
{
struct tc_tbf_qopt_offload qopt;
qopt.command = TC_TBF_STATS;
qopt.handle = sch->handle;
qopt.parent = sch->parent;
qopt.stats.bstats = &sch->bstats;
qopt.stats.qstats = &sch->qstats;
return qdisc_offload_dump_helper(sch, TC_SETUP_QDISC_TBF, &qopt);
}
/* GSO packet is too big, segment it so that tbf can transmit
* each segment in time
*/
@ -407,6 +454,8 @@ static int tbf_change(struct Qdisc *sch, struct nlattr *opt,
sch_tree_unlock(sch);
err = 0;
tbf_offload_change(sch);
done:
return err;
}
@ -432,6 +481,7 @@ static void tbf_destroy(struct Qdisc *sch)
struct tbf_sched_data *q = qdisc_priv(sch);
qdisc_watchdog_cancel(&q->watchdog);
tbf_offload_destroy(sch);
qdisc_put(q->qdisc);
}
@ -440,6 +490,11 @@ static int tbf_dump(struct Qdisc *sch, struct sk_buff *skb)
struct tbf_sched_data *q = qdisc_priv(sch);
struct nlattr *nest;
struct tc_tbf_qopt opt;
int err;
err = tbf_offload_dump(sch);
if (err)
return err;
nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
if (nest == NULL)