From 80e22e961dfd15530215f6f6dcd94cd8f65ba1ea Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 14 Nov 2018 22:23:49 -0800 Subject: net: sched: gred: provide a better structured dump and expose stats Currently all GRED's virtual queue data is dumped in a single array in a single attribute. This makes it pretty much impossible to add new fields. In order to expose more detailed stats add a new set of attributes. We can now expose the 64 bit value of bytesin and all the mark stats which were not part of the original design. Signed-off-by: Jakub Kicinski Reviewed-by: John Hurley Signed-off-by: David S. Miller --- net/sched/sch_gred.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 52 insertions(+), 1 deletion(-) (limited to 'net/sched/sch_gred.c') diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c index 6f209c83ee7a..dc09a32c4b4f 100644 --- a/net/sched/sch_gred.c +++ b/net/sched/sch_gred.c @@ -404,6 +404,7 @@ static const struct nla_policy gred_policy[TCA_GRED_MAX + 1] = { [TCA_GRED_DPS] = { .len = sizeof(struct tc_gred_sopt) }, [TCA_GRED_MAX_P] = { .type = NLA_U32 }, [TCA_GRED_LIMIT] = { .type = NLA_U32 }, + [TCA_GRED_VQ_LIST] = { .type = NLA_REJECT }, }; static int gred_change(struct Qdisc *sch, struct nlattr *opt, @@ -517,7 +518,7 @@ static int gred_init(struct Qdisc *sch, struct nlattr *opt, static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) { struct gred_sched *table = qdisc_priv(sch); - struct nlattr *parms, *opts = NULL; + struct nlattr *parms, *vqs, *opts = NULL; int i; u32 max_p[MAX_DPs]; struct tc_gred_sopt sopt = { @@ -544,6 +545,7 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) if (nla_put_u32(skb, TCA_GRED_LIMIT, sch->limit)) goto nla_put_failure; + /* Old style all-in-one dump of VQs */ parms = nla_nest_start(skb, TCA_GRED_PARMS); if (parms == NULL) goto nla_put_failure; @@ -594,6 +596,55 @@ append_opt: nla_nest_end(skb, parms); + /* Dump the VQs again, in more structured way */ + vqs = nla_nest_start(skb, TCA_GRED_VQ_LIST); + if (!vqs) + goto nla_put_failure; + + for (i = 0; i < MAX_DPs; i++) { + struct gred_sched_data *q = table->tab[i]; + struct nlattr *vq; + + if (!q) + continue; + + vq = nla_nest_start(skb, TCA_GRED_VQ_ENTRY); + if (!vq) + goto nla_put_failure; + + if (nla_put_u32(skb, TCA_GRED_VQ_DP, q->DP)) + goto nla_put_failure; + + /* Stats */ + if (nla_put_u64_64bit(skb, TCA_GRED_VQ_STAT_BYTES, q->bytesin, + TCA_GRED_VQ_PAD)) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_PACKETS, q->packetsin)) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_BACKLOG, + gred_backlog(table, q, sch))) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_PROB_DROP, + q->stats.prob_drop)) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_PROB_MARK, + q->stats.prob_mark)) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_FORCED_DROP, + q->stats.forced_drop)) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_FORCED_MARK, + q->stats.forced_mark)) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_PDROP, q->stats.pdrop)) + goto nla_put_failure; + if (nla_put_u32(skb, TCA_GRED_VQ_STAT_OTHER, q->stats.other)) + goto nla_put_failure; + + nla_nest_end(skb, vq); + } + nla_nest_end(skb, vqs); + return nla_nest_end(skb, opts); nla_put_failure: -- cgit