diff options
Diffstat (limited to 'net/sched/sch_gred.c')
| -rw-r--r-- | net/sched/sch_gred.c | 508 |
1 files changed, 414 insertions, 94 deletions
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c index d42234c0f13b..532fde548b88 100644 --- a/net/sched/sch_gred.c +++ b/net/sched/sch_gred.c @@ -1,17 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * net/sched/sch_gred.c Generic Random Early Detection queue. * - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Authors: J Hadi Salim (hadi@cyberus.ca) 1998-2002 * * 991129: - Bug fix with grio mode * - a better sing. AvgQ mode with Grio(WRED) - * - A finer grained VQ dequeue based on sugestion + * - A finer grained VQ dequeue based on suggestion * from Ren Liu * - More error checks * @@ -23,19 +18,23 @@ #include <linux/types.h> #include <linux/kernel.h> #include <linux/skbuff.h> +#include <net/pkt_cls.h> #include <net/pkt_sched.h> #include <net/red.h> #define GRED_DEF_PRIO (MAX_DPs / 2) #define GRED_VQ_MASK (MAX_DPs - 1) +#define GRED_VQ_RED_FLAGS (TC_RED_ECN | TC_RED_HARDDROP) + struct gred_sched_data; struct gred_sched; struct gred_sched_data { u32 limit; /* HARD maximal queue length */ u32 DP; /* the drop parameters */ - u32 bytesin; /* bytes seen on virtualQ so far*/ + u32 red_flags; /* virtualQ version of red_flags */ + u64 bytesin; /* bytes seen on virtualQ so far*/ u32 packetsin; /* packets seen on virtualQ so far*/ u32 backlog; /* bytes on the virtualQ */ u8 prio; /* the prio of this vq */ @@ -57,6 +56,7 @@ struct gred_sched { u32 DPs; u32 def; struct red_vars wred_set; + struct tc_gred_qopt_offload *opt; }; static inline int gred_wred_mode(struct gred_sched *table) @@ -139,17 +139,31 @@ static inline void gred_store_wred_set(struct gred_sched *table, table->wred_set.qidlestart = q->vars.qidlestart; } -static inline int gred_use_ecn(struct gred_sched *t) +static int gred_use_ecn(struct gred_sched_data *q) +{ + return q->red_flags & TC_RED_ECN; +} + +static int gred_use_harddrop(struct gred_sched_data *q) { - return t->red_flags & TC_RED_ECN; + return q->red_flags & TC_RED_HARDDROP; } -static inline int gred_use_harddrop(struct gred_sched *t) +static bool gred_per_vq_red_flags_used(struct gred_sched *table) { - return t->red_flags & TC_RED_HARDDROP; + unsigned int i; + + /* Local per-vq flags couldn't have been set unless global are 0 */ + if (table->red_flags) + return false; + for (i = 0; i < MAX_DPs; i++) + if (table->tab[i] && table->tab[i]->red_flags) + return true; + return false; } -static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch) +static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch, + struct sk_buff **to_free) { struct gred_sched_data *q = NULL; struct gred_sched *t = qdisc_priv(sch); @@ -165,7 +179,8 @@ static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch) * if no default DP has been configured. This * allows for DP flows to be left untouched. */ - if (skb_queue_len(&sch->q) < qdisc_dev(sch)->tx_queue_len) + if (likely(sch->qstats.backlog + qdisc_pkt_len(skb) <= + sch->limit)) return qdisc_enqueue_tail(skb, sch); else goto drop; @@ -209,8 +224,8 @@ static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch) break; case RED_PROB_MARK: - sch->qstats.overlimits++; - if (!gred_use_ecn(t) || !INET_ECN_set_ce(skb)) { + qdisc_qstats_overlimit(sch); + if (!gred_use_ecn(q) || !INET_ECN_set_ce(skb)) { q->stats.prob_drop++; goto congestion_drop; } @@ -219,8 +234,8 @@ static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch) break; case RED_HARD_MARK: - sch->qstats.overlimits++; - if (gred_use_harddrop(t) || !gred_use_ecn(t) || + qdisc_qstats_overlimit(sch); + if (gred_use_harddrop(q) || !gred_use_ecn(q) || !INET_ECN_set_ce(skb)) { q->stats.forced_drop++; goto congestion_drop; @@ -229,17 +244,17 @@ static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch) break; } - if (q->backlog + qdisc_pkt_len(skb) <= q->limit) { + if (gred_backlog(t, q, sch) + qdisc_pkt_len(skb) <= q->limit) { q->backlog += qdisc_pkt_len(skb); return qdisc_enqueue_tail(skb, sch); } q->stats.pdrop++; drop: - return qdisc_drop(skb, sch); + return qdisc_drop_reason(skb, sch, to_free, SKB_DROP_REASON_QDISC_OVERLIMIT); congestion_drop: - qdisc_drop(skb, sch); + qdisc_drop_reason(skb, sch, to_free, SKB_DROP_REASON_QDISC_CONGESTED); return NET_XMIT_CN; } @@ -275,40 +290,6 @@ static struct sk_buff *gred_dequeue(struct Qdisc *sch) return NULL; } -static unsigned int gred_drop(struct Qdisc *sch) -{ - struct sk_buff *skb; - struct gred_sched *t = qdisc_priv(sch); - - skb = qdisc_dequeue_tail(sch); - if (skb) { - unsigned int len = qdisc_pkt_len(skb); - struct gred_sched_data *q; - u16 dp = tc_index_to_dp(skb); - - if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { - net_warn_ratelimited("GRED: Unable to relocate VQ 0x%x while dropping, screwing up backlog\n", - tc_index_to_dp(skb)); - } else { - q->backlog -= len; - q->stats.other++; - - if (gred_wred_mode(t)) { - if (!sch->qstats.backlog) - red_start_of_idle_period(&t->wred_set); - } else { - if (!q->backlog) - red_start_of_idle_period(&q->vars); - } - } - - qdisc_drop(skb, sch); - return len; - } - - return 0; -} - static void gred_reset(struct Qdisc *sch) { int i; @@ -327,28 +308,138 @@ static void gred_reset(struct Qdisc *sch) } } +static void gred_offload(struct Qdisc *sch, enum tc_gred_command command) +{ + struct gred_sched *table = qdisc_priv(sch); + struct net_device *dev = qdisc_dev(sch); + struct tc_gred_qopt_offload *opt = table->opt; + + if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc) + return; + + memset(opt, 0, sizeof(*opt)); + opt->command = command; + opt->handle = sch->handle; + opt->parent = sch->parent; + + if (command == TC_GRED_REPLACE) { + unsigned int i; + + opt->set.grio_on = gred_rio_mode(table); + opt->set.wred_on = gred_wred_mode(table); + opt->set.dp_cnt = table->DPs; + opt->set.dp_def = table->def; + + for (i = 0; i < table->DPs; i++) { + struct gred_sched_data *q = table->tab[i]; + + if (!q) + continue; + opt->set.tab[i].present = true; + opt->set.tab[i].limit = q->limit; + opt->set.tab[i].prio = q->prio; + opt->set.tab[i].min = q->parms.qth_min >> q->parms.Wlog; + opt->set.tab[i].max = q->parms.qth_max >> q->parms.Wlog; + opt->set.tab[i].is_ecn = gred_use_ecn(q); + opt->set.tab[i].is_harddrop = gred_use_harddrop(q); + opt->set.tab[i].probability = q->parms.max_P; + opt->set.tab[i].backlog = &q->backlog; + } + opt->set.qstats = &sch->qstats; + } + + dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_GRED, opt); +} + +static int gred_offload_dump_stats(struct Qdisc *sch) +{ + struct gred_sched *table = qdisc_priv(sch); + struct tc_gred_qopt_offload *hw_stats; + u64 bytes = 0, packets = 0; + unsigned int i; + int ret; + + hw_stats = kzalloc(sizeof(*hw_stats), GFP_KERNEL); + if (!hw_stats) + return -ENOMEM; + + hw_stats->command = TC_GRED_STATS; + hw_stats->handle = sch->handle; + hw_stats->parent = sch->parent; + + for (i = 0; i < MAX_DPs; i++) { + gnet_stats_basic_sync_init(&hw_stats->stats.bstats[i]); + if (table->tab[i]) + hw_stats->stats.xstats[i] = &table->tab[i]->stats; + } + + ret = qdisc_offload_dump_helper(sch, TC_SETUP_QDISC_GRED, hw_stats); + /* Even if driver returns failure adjust the stats - in case offload + * ended but driver still wants to adjust the values. + */ + sch_tree_lock(sch); + for (i = 0; i < MAX_DPs; i++) { + if (!table->tab[i]) + continue; + table->tab[i]->packetsin += u64_stats_read(&hw_stats->stats.bstats[i].packets); + table->tab[i]->bytesin += u64_stats_read(&hw_stats->stats.bstats[i].bytes); + table->tab[i]->backlog += hw_stats->stats.qstats[i].backlog; + + bytes += u64_stats_read(&hw_stats->stats.bstats[i].bytes); + packets += u64_stats_read(&hw_stats->stats.bstats[i].packets); + sch->qstats.qlen += hw_stats->stats.qstats[i].qlen; + sch->qstats.backlog += hw_stats->stats.qstats[i].backlog; + sch->qstats.drops += hw_stats->stats.qstats[i].drops; + sch->qstats.requeues += hw_stats->stats.qstats[i].requeues; + sch->qstats.overlimits += hw_stats->stats.qstats[i].overlimits; + } + _bstats_update(&sch->bstats, bytes, packets); + sch_tree_unlock(sch); + + kfree(hw_stats); + return ret; +} + static inline void gred_destroy_vq(struct gred_sched_data *q) { kfree(q); } -static inline int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps) +static int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps, + struct netlink_ext_ack *extack) { struct gred_sched *table = qdisc_priv(sch); struct tc_gred_sopt *sopt; + bool red_flags_changed; int i; - if (dps == NULL) + if (!dps) return -EINVAL; sopt = nla_data(dps); - if (sopt->DPs > MAX_DPs || sopt->DPs == 0 || sopt->def_DP >= sopt->DPs) + if (sopt->DPs > MAX_DPs) { + NL_SET_ERR_MSG_MOD(extack, "number of virtual queues too high"); + return -EINVAL; + } + if (sopt->DPs == 0) { + NL_SET_ERR_MSG_MOD(extack, + "number of virtual queues can't be 0"); + return -EINVAL; + } + if (sopt->def_DP >= sopt->DPs) { + NL_SET_ERR_MSG_MOD(extack, "default virtual queue above virtual queue count"); return -EINVAL; + } + if (sopt->flags && gred_per_vq_red_flags_used(table)) { + NL_SET_ERR_MSG_MOD(extack, "can't set per-Qdisc RED flags when per-virtual queue flags are used"); + return -EINVAL; + } sch_tree_lock(sch); table->DPs = sopt->DPs; table->def = sopt->def_DP; + red_flags_changed = table->red_flags != sopt->flags; table->red_flags = sopt->flags; /* @@ -368,36 +459,53 @@ static inline int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps) gred_disable_wred_mode(table); } + if (red_flags_changed) + for (i = 0; i < table->DPs; i++) + if (table->tab[i]) + table->tab[i]->red_flags = + table->red_flags & GRED_VQ_RED_FLAGS; + for (i = table->DPs; i < MAX_DPs; i++) { if (table->tab[i]) { - pr_warning("GRED: Warning: Destroying " - "shadowed VQ 0x%x\n", i); + pr_warn("GRED: Warning: Destroying shadowed VQ 0x%x\n", + i); gred_destroy_vq(table->tab[i]); table->tab[i] = NULL; } } + gred_offload(sch, TC_GRED_REPLACE); return 0; } static inline int gred_change_vq(struct Qdisc *sch, int dp, struct tc_gred_qopt *ctl, int prio, u8 *stab, u32 max_P, - struct gred_sched_data **prealloc) + struct gred_sched_data **prealloc, + struct netlink_ext_ack *extack) { struct gred_sched *table = qdisc_priv(sch); struct gred_sched_data *q = table->tab[dp]; + if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Scell_log, stab)) { + NL_SET_ERR_MSG_MOD(extack, "invalid RED parameters"); + return -EINVAL; + } + if (!q) { table->tab[dp] = q = *prealloc; *prealloc = NULL; if (!q) return -ENOMEM; + q->red_flags = table->red_flags & GRED_VQ_RED_FLAGS; } q->DP = dp; q->prio = prio; - q->limit = ctl->limit; + if (ctl->limit > sch->limit) + q->limit = sch->limit; + else + q->limit = ctl->limit; if (q->backlog == 0) red_end_of_idle_period(&q->vars); @@ -409,14 +517,130 @@ static inline int gred_change_vq(struct Qdisc *sch, int dp, return 0; } +static const struct nla_policy gred_vq_policy[TCA_GRED_VQ_MAX + 1] = { + [TCA_GRED_VQ_DP] = { .type = NLA_U32 }, + [TCA_GRED_VQ_FLAGS] = { .type = NLA_U32 }, +}; + +static const struct nla_policy gred_vqe_policy[TCA_GRED_VQ_ENTRY_MAX + 1] = { + [TCA_GRED_VQ_ENTRY] = { .type = NLA_NESTED }, +}; + static const struct nla_policy gred_policy[TCA_GRED_MAX + 1] = { [TCA_GRED_PARMS] = { .len = sizeof(struct tc_gred_qopt) }, [TCA_GRED_STAB] = { .len = 256 }, [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_NESTED }, }; -static int gred_change(struct Qdisc *sch, struct nlattr *opt) +static void gred_vq_apply(struct gred_sched *table, const struct nlattr *entry) +{ + struct nlattr *tb[TCA_GRED_VQ_MAX + 1]; + u32 dp; + + nla_parse_nested_deprecated(tb, TCA_GRED_VQ_MAX, entry, + gred_vq_policy, NULL); + + dp = nla_get_u32(tb[TCA_GRED_VQ_DP]); + + if (tb[TCA_GRED_VQ_FLAGS]) + table->tab[dp]->red_flags = nla_get_u32(tb[TCA_GRED_VQ_FLAGS]); +} + +static void gred_vqs_apply(struct gred_sched *table, struct nlattr *vqs) +{ + const struct nlattr *attr; + int rem; + + nla_for_each_nested(attr, vqs, rem) { + switch (nla_type(attr)) { + case TCA_GRED_VQ_ENTRY: + gred_vq_apply(table, attr); + break; + } + } +} + +static int gred_vq_validate(struct gred_sched *table, u32 cdp, + const struct nlattr *entry, + struct netlink_ext_ack *extack) +{ + struct nlattr *tb[TCA_GRED_VQ_MAX + 1]; + int err; + u32 dp; + + err = nla_parse_nested_deprecated(tb, TCA_GRED_VQ_MAX, entry, + gred_vq_policy, extack); + if (err < 0) + return err; + + if (!tb[TCA_GRED_VQ_DP]) { + NL_SET_ERR_MSG_MOD(extack, "Virtual queue with no index specified"); + return -EINVAL; + } + dp = nla_get_u32(tb[TCA_GRED_VQ_DP]); + if (dp >= table->DPs) { + NL_SET_ERR_MSG_MOD(extack, "Virtual queue with index out of bounds"); + return -EINVAL; + } + if (dp != cdp && !table->tab[dp]) { + NL_SET_ERR_MSG_MOD(extack, "Virtual queue not yet instantiated"); + return -EINVAL; + } + + if (tb[TCA_GRED_VQ_FLAGS]) { + u32 red_flags = nla_get_u32(tb[TCA_GRED_VQ_FLAGS]); + + if (table->red_flags && table->red_flags != red_flags) { + NL_SET_ERR_MSG_MOD(extack, "can't change per-virtual queue RED flags when per-Qdisc flags are used"); + return -EINVAL; + } + if (red_flags & ~GRED_VQ_RED_FLAGS) { + NL_SET_ERR_MSG_MOD(extack, + "invalid RED flags specified"); + return -EINVAL; + } + } + + return 0; +} + +static int gred_vqs_validate(struct gred_sched *table, u32 cdp, + struct nlattr *vqs, struct netlink_ext_ack *extack) +{ + const struct nlattr *attr; + int rem, err; + + err = nla_validate_nested_deprecated(vqs, TCA_GRED_VQ_ENTRY_MAX, + gred_vqe_policy, extack); + if (err < 0) + return err; + + nla_for_each_nested(attr, vqs, rem) { + switch (nla_type(attr)) { + case TCA_GRED_VQ_ENTRY: + err = gred_vq_validate(table, cdp, attr, extack); + if (err) + return err; + break; + default: + NL_SET_ERR_MSG_MOD(extack, "GRED_VQ_LIST can contain only entry attributes"); + return -EINVAL; + } + } + + if (rem > 0) { + NL_SET_ERR_MSG_MOD(extack, "Trailing data after parsing virtual queue list"); + return -EINVAL; + } + + return 0; +} + +static int gred_change(struct Qdisc *sch, struct nlattr *opt, + struct netlink_ext_ack *extack) { struct gred_sched *table = qdisc_priv(sch); struct tc_gred_qopt *ctl; @@ -426,28 +650,40 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt) u32 max_P; struct gred_sched_data *prealloc; - if (opt == NULL) - return -EINVAL; - - err = nla_parse_nested(tb, TCA_GRED_MAX, opt, gred_policy); + err = nla_parse_nested_deprecated(tb, TCA_GRED_MAX, opt, gred_policy, + extack); if (err < 0) return err; - if (tb[TCA_GRED_PARMS] == NULL && tb[TCA_GRED_STAB] == NULL) - return gred_change_table_def(sch, opt); + if (tb[TCA_GRED_PARMS] == NULL && tb[TCA_GRED_STAB] == NULL) { + if (tb[TCA_GRED_LIMIT] != NULL) + sch->limit = nla_get_u32(tb[TCA_GRED_LIMIT]); + return gred_change_table_def(sch, tb[TCA_GRED_DPS], extack); + } if (tb[TCA_GRED_PARMS] == NULL || - tb[TCA_GRED_STAB] == NULL) + tb[TCA_GRED_STAB] == NULL || + tb[TCA_GRED_LIMIT] != NULL) { + NL_SET_ERR_MSG_MOD(extack, "can't configure Qdisc and virtual queue at the same time"); return -EINVAL; + } - max_P = tb[TCA_GRED_MAX_P] ? nla_get_u32(tb[TCA_GRED_MAX_P]) : 0; + max_P = nla_get_u32_default(tb[TCA_GRED_MAX_P], 0); - err = -EINVAL; ctl = nla_data(tb[TCA_GRED_PARMS]); stab = nla_data(tb[TCA_GRED_STAB]); - if (ctl->DP >= table->DPs) - goto errout; + if (ctl->DP >= table->DPs) { + NL_SET_ERR_MSG_MOD(extack, "virtual queue index above virtual queue count"); + return -EINVAL; + } + + if (tb[TCA_GRED_VQ_LIST]) { + err = gred_vqs_validate(table, ctl->DP, tb[TCA_GRED_VQ_LIST], + extack); + if (err) + return err; + } if (gred_rio_mode(table)) { if (ctl->prio == 0) { @@ -467,9 +703,13 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt) prealloc = kzalloc(sizeof(*prealloc), GFP_KERNEL); sch_tree_lock(sch); - err = gred_change_vq(sch, ctl->DP, ctl, prio, stab, max_P, &prealloc); + err = gred_change_vq(sch, ctl->DP, ctl, prio, stab, max_P, &prealloc, + extack); if (err < 0) - goto errout_locked; + goto err_unlock_free; + + if (tb[TCA_GRED_VQ_LIST]) + gred_vqs_apply(table, tb[TCA_GRED_VQ_LIST]); if (gred_rio_mode(table)) { gred_disable_wred_mode(table); @@ -477,37 +717,58 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt) gred_enable_wred_mode(table); } - err = 0; + sch_tree_unlock(sch); + kfree(prealloc); + + gred_offload(sch, TC_GRED_REPLACE); + return 0; -errout_locked: +err_unlock_free: sch_tree_unlock(sch); kfree(prealloc); -errout: return err; } -static int gred_init(struct Qdisc *sch, struct nlattr *opt) +static int gred_init(struct Qdisc *sch, struct nlattr *opt, + struct netlink_ext_ack *extack) { + struct gred_sched *table = qdisc_priv(sch); struct nlattr *tb[TCA_GRED_MAX + 1]; int err; - if (opt == NULL) + if (!opt) return -EINVAL; - err = nla_parse_nested(tb, TCA_GRED_MAX, opt, gred_policy); + err = nla_parse_nested_deprecated(tb, TCA_GRED_MAX, opt, gred_policy, + extack); if (err < 0) return err; - if (tb[TCA_GRED_PARMS] || tb[TCA_GRED_STAB]) + if (tb[TCA_GRED_PARMS] || tb[TCA_GRED_STAB]) { + NL_SET_ERR_MSG_MOD(extack, + "virtual queue configuration can't be specified at initialization time"); return -EINVAL; + } + + if (tb[TCA_GRED_LIMIT]) + sch->limit = nla_get_u32(tb[TCA_GRED_LIMIT]); + else + sch->limit = qdisc_dev(sch)->tx_queue_len + * psched_mtu(qdisc_dev(sch)); - return gred_change_table_def(sch, tb[TCA_GRED_DPS]); + if (qdisc_dev(sch)->netdev_ops->ndo_setup_tc) { + table->opt = kzalloc(sizeof(*table->opt), GFP_KERNEL); + if (!table->opt) + return -ENOMEM; + } + + return gred_change_table_def(sch, tb[TCA_GRED_DPS], extack); } 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 = { @@ -517,7 +778,10 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) .flags = table->red_flags, }; - opts = nla_nest_start(skb, TCA_OPTIONS); + if (gred_offload_dump_stats(sch)) + goto nla_put_failure; + + opts = nla_nest_start_noflag(skb, TCA_OPTIONS); if (opts == NULL) goto nla_put_failure; if (nla_put(skb, TCA_GRED_DPS, sizeof(sopt), &sopt)) @@ -531,7 +795,11 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) if (nla_put(skb, TCA_GRED_MAX_P, sizeof(max_p), max_p)) goto nla_put_failure; - parms = nla_nest_start(skb, TCA_GRED_PARMS); + 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_noflag(skb, TCA_GRED_PARMS); if (parms == NULL) goto nla_put_failure; @@ -553,14 +821,13 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) opt.limit = q->limit; opt.DP = q->DP; - opt.backlog = q->backlog; + opt.backlog = gred_backlog(table, q, sch); opt.prio = q->prio; opt.qth_min = q->parms.qth_min >> q->parms.Wlog; opt.qth_max = q->parms.qth_max >> q->parms.Wlog; opt.Wlog = q->parms.Wlog; opt.Plog = q->parms.Plog; opt.Scell_log = q->parms.Scell_log; - opt.other = q->stats.other; opt.early = q->stats.prob_drop; opt.forced = q->stats.forced_drop; opt.pdrop = q->stats.pdrop; @@ -581,6 +848,56 @@ append_opt: nla_nest_end(skb, parms); + /* Dump the VQs again, in more structured way */ + vqs = nla_nest_start_noflag(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_noflag(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; + + if (nla_put_u32(skb, TCA_GRED_VQ_FLAGS, q->red_flags)) + 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; + + nla_nest_end(skb, vq); + } + nla_nest_end(skb, vqs); + return nla_nest_end(skb, opts); nla_put_failure: @@ -593,10 +910,12 @@ static void gred_destroy(struct Qdisc *sch) struct gred_sched *table = qdisc_priv(sch); int i; - for (i = 0; i < table->DPs; i++) { - if (table->tab[i]) - gred_destroy_vq(table->tab[i]); - } + for (i = 0; i < table->DPs; i++) + gred_destroy_vq(table->tab[i]); + + if (table->opt) + gred_offload(sch, TC_GRED_DESTROY); + kfree(table->opt); } static struct Qdisc_ops gred_qdisc_ops __read_mostly = { @@ -605,7 +924,6 @@ static struct Qdisc_ops gred_qdisc_ops __read_mostly = { .enqueue = gred_enqueue, .dequeue = gred_dequeue, .peek = qdisc_peek_head, - .drop = gred_drop, .init = gred_init, .reset = gred_reset, .destroy = gred_destroy, @@ -613,6 +931,7 @@ static struct Qdisc_ops gred_qdisc_ops __read_mostly = { .dump = gred_dump, .owner = THIS_MODULE, }; +MODULE_ALIAS_NET_SCH("gred"); static int __init gred_module_init(void) { @@ -628,3 +947,4 @@ module_init(gred_module_init) module_exit(gred_module_exit) MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Generic Random Early Detection qdisc"); |