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net/sched: refactor mqprio qopt reconstruction to a library function 

The taprio qdisc will need to reconstruct a struct tc_mqprio_qopt from
netdev settings once more in a future patch, but this code was already
written twice, once in taprio and once in mqprio.

Refactor the code to a helper in the common mqprio library.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2023-02-04 15:53:02 +02:00 committed by David S. Miller
parent 1dfe086dd7
commit 9dd6ad674c
4 changed files with 19 additions and 16 deletions
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10
net/sched/sch_mqprio.c
View File

@ -406,7 +406,7 @@ static int mqprio_dump(struct Qdisc *sch, struct sk_buff *skb)
struct nlattr *nla = (struct nlattr *)skb_tail_pointer(skb);
struct tc_mqprio_qopt opt = { 0 };
struct Qdisc *qdisc;
unsigned int ntx, tc;
unsigned int ntx;
sch->q.qlen = 0;
gnet_stats_basic_sync_init(&sch->bstats);
@ -430,15 +430,9 @@ static int mqprio_dump(struct Qdisc *sch, struct sk_buff *skb)
spin_unlock_bh(qdisc_lock(qdisc));
}
opt.num_tc = netdev_get_num_tc(dev);
memcpy(opt.prio_tc_map, dev->prio_tc_map, sizeof(opt.prio_tc_map));
mqprio_qopt_reconstruct(dev, &opt);
opt.hw = priv->hw_offload;
for (tc = 0; tc < netdev_get_num_tc(dev); tc++) {
opt.count[tc] = dev->tc_to_txq[tc].count;
opt.offset[tc] = dev->tc_to_txq[tc].offset;
}
if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt))
goto nla_put_failure;

14
net/sched/sch_mqprio_lib.c
View File

@ -100,4 +100,18 @@ int mqprio_validate_qopt(struct net_device *dev, struct tc_mqprio_qopt *qopt,
}
EXPORT_SYMBOL_GPL(mqprio_validate_qopt);
void mqprio_qopt_reconstruct(struct net_device *dev, struct tc_mqprio_qopt *qopt)
{
int tc, num_tc = netdev_get_num_tc(dev);
qopt->num_tc = num_tc;
memcpy(qopt->prio_tc_map, dev->prio_tc_map, sizeof(qopt->prio_tc_map));
for (tc = 0; tc < num_tc; tc++) {
qopt->count[tc] = dev->tc_to_txq[tc].count;
qopt->offset[tc] = dev->tc_to_txq[tc].offset;
}
}
EXPORT_SYMBOL_GPL(mqprio_qopt_reconstruct);
MODULE_LICENSE("GPL");

2
net/sched/sch_mqprio_lib.h
View File

@ -12,5 +12,7 @@ int mqprio_validate_qopt(struct net_device *dev, struct tc_mqprio_qopt *qopt,
bool validate_queue_counts,
bool allow_overlapping_txqs,
struct netlink_ext_ack *extack);
void mqprio_qopt_reconstruct(struct net_device *dev,
struct tc_mqprio_qopt *qopt);
#endif

9
net/sched/sch_taprio.c
View File

@ -1948,18 +1948,11 @@ static int taprio_dump(struct Qdisc *sch, struct sk_buff *skb)
struct sched_gate_list *oper, *admin;
struct tc_mqprio_qopt opt = { 0 };
struct nlattr *nest, *sched_nest;
unsigned int i;
oper = rtnl_dereference(q->oper_sched);
admin = rtnl_dereference(q->admin_sched);
opt.num_tc = netdev_get_num_tc(dev);
memcpy(opt.prio_tc_map, dev->prio_tc_map, sizeof(opt.prio_tc_map));
for (i = 0; i < netdev_get_num_tc(dev); i++) {
opt.count[i] = dev->tc_to_txq[i].count;
opt.offset[i] = dev->tc_to_txq[i].offset;
}
mqprio_qopt_reconstruct(dev, &opt);
nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
if (!nest)