diff options
| author | Alexander Aring <aring@mojatatu.com> | 2017-12-20 20:35:24 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-21 20:32:51 +0300 |
| commit | a7c31693e1054fe9af08bc404cdd687c327d0fa6 (patch) | |
| tree | 5c4fb8e9cdf00e1a3aab878375c9a8f06b26bb4c /net/sched/sch_drr.c | |
| parent | 710fb39689d194aa0acf7928f387487c25fb2b8f (diff) | |
| download | linux-a7c31693e1054fe9af08bc404cdd687c327d0fa6.tar.xz | |
net: sch: sch_drr: add extack support
This patch adds extack support for the drr qdisc implementation by
adding NL_SET_ERR_MSG in validation of user input.
Also it serves to illustrate a use case of how the infrastructure ops
api changes are to be used by individual qdiscs.
Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_drr.c')
| -rw-r--r-- | net/sched/sch_drr.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c index bf638ce57c50..e0b0cf8a9939 100644 --- a/net/sched/sch_drr.c +++ b/net/sched/sch_drr.c @@ -74,17 +74,21 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid, u32 quantum; int err; - if (!opt) + if (!opt) { + NL_SET_ERR_MSG(extack, "DRR options are required for this operation"); return -EINVAL; + } - err = nla_parse_nested(tb, TCA_DRR_MAX, opt, drr_policy, NULL); + err = nla_parse_nested(tb, TCA_DRR_MAX, opt, drr_policy, extack); if (err < 0) return err; if (tb[TCA_DRR_QUANTUM]) { quantum = nla_get_u32(tb[TCA_DRR_QUANTUM]); - if (quantum == 0) + if (quantum == 0) { + NL_SET_ERR_MSG(extack, "Specified DRR quantum cannot be zero"); return -EINVAL; + } } else quantum = psched_mtu(qdisc_dev(sch)); @@ -95,8 +99,10 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid, NULL, qdisc_root_sleeping_running(sch), tca[TCA_RATE]); - if (err) + if (err) { + NL_SET_ERR_MSG(extack, "Failed to replace estimator"); return err; + } } sch_tree_lock(sch); @@ -127,6 +133,7 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid, qdisc_root_sleeping_running(sch), tca[TCA_RATE]); if (err) { + NL_SET_ERR_MSG(extack, "Failed to replace estimator"); qdisc_destroy(cl->qdisc); kfree(cl); return err; @@ -179,8 +186,10 @@ static struct tcf_block *drr_tcf_block(struct Qdisc *sch, unsigned long cl, { struct drr_sched *q = qdisc_priv(sch); - if (cl) + if (cl) { + NL_SET_ERR_MSG(extack, "DRR classid must be zero"); return NULL; + } return q->block; } |