From 733f0766c3dea0a92573e38acb62ace3cf4e58c6 Mon Sep 17 00:00:00 2001 From: Kevin Darbyshire-Bryant Date: Fri, 14 Jun 2019 10:09:44 +0100 Subject: [PATCH] sched: act_ctinfo: use extack error reporting Use extack error reporting mechanism in addition to returning -EINVAL NL_SET_ERR_* code shamelessy copy/paste/adjusted from act_pedit & sch_cake and used as reference as to what I should have done in the first place. Signed-off-by: Kevin Darbyshire-Bryant Signed-off-by: David S. Miller --- net/sched/act_ctinfo.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/net/sched/act_ctinfo.c b/net/sched/act_ctinfo.c index e78b60e47c0f..a7d3679d7e2e 100644 --- a/net/sched/act_ctinfo.c +++ b/net/sched/act_ctinfo.c @@ -165,15 +165,20 @@ static int tcf_ctinfo_init(struct net *net, struct nlattr *nla, u8 dscpmaskshift; int ret = 0, err; - if (!nla) + if (!nla) { + NL_SET_ERR_MSG_MOD(extack, "ctinfo requires attributes to be passed"); return -EINVAL; + } - err = nla_parse_nested(tb, TCA_CTINFO_MAX, nla, ctinfo_policy, NULL); + err = nla_parse_nested(tb, TCA_CTINFO_MAX, nla, ctinfo_policy, extack); if (err < 0) return err; - if (!tb[TCA_CTINFO_ACT]) + if (!tb[TCA_CTINFO_ACT]) { + NL_SET_ERR_MSG_MOD(extack, + "Missing required TCA_CTINFO_ACT attribute"); return -EINVAL; + } actparm = nla_data(tb[TCA_CTINFO_ACT]); /* do some basic validation here before dynamically allocating things */ @@ -182,13 +187,21 @@ static int tcf_ctinfo_init(struct net *net, struct nlattr *nla, dscpmask = nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_MASK]); /* need contiguous 6 bit mask */ dscpmaskshift = dscpmask ? __ffs(dscpmask) : 0; - if ((~0 & (dscpmask >> dscpmaskshift)) != 0x3f) + if ((~0 & (dscpmask >> dscpmaskshift)) != 0x3f) { + NL_SET_ERR_MSG_ATTR(extack, + tb[TCA_CTINFO_PARMS_DSCP_MASK], + "dscp mask must be 6 contiguous bits"); return -EINVAL; + } dscpstatemask = tb[TCA_CTINFO_PARMS_DSCP_STATEMASK] ? nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]) : 0; /* mask & statemask must not overlap */ - if (dscpmask & dscpstatemask) + if (dscpmask & dscpstatemask) { + NL_SET_ERR_MSG_ATTR(extack, + tb[TCA_CTINFO_PARMS_DSCP_STATEMASK], + "dscp statemask must not overlap dscp mask"); return -EINVAL; + } } /* done the validation:now to the actual action allocation */