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sch_htb: Add extack messages for EOPNOTSUPP errors

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In order to make the "Operation not supported" message clearer to the
user, add extack messages explaining why exactly adding offloaded HTB
could be not supported in each case.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxim Mikityanskiy 2021-10-28 15:24:36 +03:00 committed by David S. Miller
parent 3a26babb41
commit 648a991cf3
1 changed files with 6 additions and 2 deletions
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8
net/sched/sch_htb.c
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@ -1084,11 +1084,15 @@ static int htb_init(struct Qdisc *sch, struct nlattr *opt,
offload = nla_get_flag(tb[TCA_HTB_OFFLOAD]);
if (offload) {
if (sch->parent != TC_H_ROOT)
if (sch->parent != TC_H_ROOT) {
NL_SET_ERR_MSG(extack, "HTB must be the root qdisc to use offload");
return -EOPNOTSUPP;
}
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc) {
NL_SET_ERR_MSG(extack, "hw-tc-offload ethtool feature flag must be on");
return -EOPNOTSUPP;
}
q->num_direct_qdiscs = dev->real_num_tx_queues;
q->direct_qdiscs = kcalloc(q->num_direct_qdiscs,