diff options
| -rw-r--r-- | net/sched/sch_gred.c | 173 |
1 files changed, 84 insertions, 89 deletions
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c index b04b07fcc2cf..ca6cb271493b 100644 --- a/net/sched/sch_gred.c +++ b/net/sched/sch_gred.c @@ -58,6 +58,8 @@ #define D2PRINTK(format,args...) #endif +#define GRED_DEF_PRIO (MAX_DPs / 2) + struct gred_sched_data; struct gred_sched; @@ -432,77 +434,102 @@ static inline int gred_change_table_def(struct Qdisc *sch, struct rtattr *dps) return 0; } -static int gred_change(struct Qdisc *sch, struct rtattr *opt) +static inline int gred_change_vq(struct Qdisc *sch, int dp, + struct tc_gred_qopt *ctl, int prio, u8 *stab) { struct gred_sched *table = qdisc_priv(sch); struct gred_sched_data *q; + + if (table->tab[dp] == NULL) { + table->tab[dp] = kmalloc(sizeof(*q), GFP_KERNEL); + if (table->tab[dp] == NULL) + return -ENOMEM; + memset(table->tab[dp], 0, sizeof(*q)); + } + + q = table->tab[dp]; + q->DP = dp; + q->prio = prio; + + q->Wlog = ctl->Wlog; + q->Plog = ctl->Plog; + q->limit = ctl->limit; + q->Scell_log = ctl->Scell_log; + q->Rmask = ctl->Plog < 32 ? ((1<<ctl->Plog) - 1) : ~0UL; + q->Scell_max = (255<<q->Scell_log); + q->qth_min = ctl->qth_min<<ctl->Wlog; + q->qth_max = ctl->qth_max<<ctl->Wlog; + q->qave=0; + q->backlog=0; + q->qcount = -1; + q->other=0; + q->forced=0; + q->pdrop=0; + q->early=0; + + PSCHED_SET_PASTPERFECT(q->qidlestart); + memcpy(q->Stab, stab, 256); + + return 0; +} + +static int gred_change(struct Qdisc *sch, struct rtattr *opt) +{ + struct gred_sched *table = qdisc_priv(sch); struct tc_gred_qopt *ctl; - struct rtattr *tb[TCA_GRED_STAB]; + struct rtattr *tb[TCA_GRED_MAX]; + int err = -EINVAL, prio = GRED_DEF_PRIO; + u8 *stab; - if (opt == NULL || rtattr_parse_nested(tb, TCA_GRED_STAB, opt)) + if (opt == NULL || rtattr_parse_nested(tb, TCA_GRED_MAX, opt)) return -EINVAL; if (tb[TCA_GRED_PARMS-1] == NULL && tb[TCA_GRED_STAB-1] == NULL) - return gred_change_table_def(sch, tb[TCA_GRED_DPS-1]); + return gred_change_table_def(sch, opt); - if (!table->DPs || tb[TCA_GRED_PARMS-1] == 0 || tb[TCA_GRED_STAB-1] == 0 || - RTA_PAYLOAD(tb[TCA_GRED_PARMS-1]) < sizeof(*ctl) || - RTA_PAYLOAD(tb[TCA_GRED_STAB-1]) < 256) - return -EINVAL; + if (tb[TCA_GRED_PARMS-1] == NULL || + RTA_PAYLOAD(tb[TCA_GRED_PARMS-1]) < sizeof(*ctl) || + tb[TCA_GRED_STAB-1] == NULL || + RTA_PAYLOAD(tb[TCA_GRED_STAB-1]) < 256) + return -EINVAL; ctl = RTA_DATA(tb[TCA_GRED_PARMS-1]); + stab = RTA_DATA(tb[TCA_GRED_STAB-1]); if (ctl->DP >= table->DPs) - return -EINVAL; - - if (table->tab[ctl->DP] == NULL) { - table->tab[ctl->DP]=kmalloc(sizeof(struct gred_sched_data), - GFP_KERNEL); - if (NULL == table->tab[ctl->DP]) - return -ENOMEM; - memset(table->tab[ctl->DP], 0, (sizeof(struct gred_sched_data))); - } - q= table->tab[ctl->DP]; + goto errout; if (gred_rio_mode(table)) { - if (ctl->prio <=0) { - if (table->def && table->tab[table->def]) { - DPRINTK("\nGRED: DP %u does not have a prio" - "setting default to %d\n",ctl->DP, - table->tab[table->def]->prio); - q->prio=table->tab[table->def]->prio; - } else { - DPRINTK("\nGRED: DP %u does not have a prio" - " setting default to 8\n",ctl->DP); - q->prio=8; - } - } else { - q->prio=ctl->prio; - } - } else { - q->prio=8; + if (ctl->prio == 0) { + int def_prio = GRED_DEF_PRIO; + + if (table->tab[table->def]) + def_prio = table->tab[table->def]->prio; + + printk(KERN_DEBUG "GRED: DP %u does not have a prio " + "setting default to %d\n", ctl->DP, def_prio); + + prio = def_prio; + } else + prio = ctl->prio; } + sch_tree_lock(sch); - q->DP=ctl->DP; - q->Wlog = ctl->Wlog; - q->Plog = ctl->Plog; - q->limit = ctl->limit; - q->Scell_log = ctl->Scell_log; - q->Rmask = ctl->Plog < 32 ? ((1<<ctl->Plog) - 1) : ~0UL; - q->Scell_max = (255<<q->Scell_log); - q->qth_min = ctl->qth_min<<ctl->Wlog; - q->qth_max = ctl->qth_max<<ctl->Wlog; - q->qave=0; - q->backlog=0; - q->qcount = -1; - q->other=0; - q->forced=0; - q->pdrop=0; - q->early=0; + err = gred_change_vq(sch, ctl->DP, ctl, prio, stab); + if (err < 0) + goto errout_locked; - PSCHED_SET_PASTPERFECT(q->qidlestart); - memcpy(q->Stab, RTA_DATA(tb[TCA_GRED_STAB-1]), 256); + if (table->tab[table->def] == NULL) { + if (gred_rio_mode(table)) + prio = table->tab[ctl->DP]->prio; + + err = gred_change_vq(sch, table->def, ctl, prio, stab); + if (err < 0) + goto errout_locked; + } + + table->initd = 1; if (gred_rio_mode(table)) { gred_disable_wred_mode(table); @@ -510,44 +537,12 @@ static int gred_change(struct Qdisc *sch, struct rtattr *opt) gred_enable_wred_mode(table); } - if (!table->initd) { - table->initd=1; - /* - the first entry also goes into the default until - over-written - */ - - if (table->tab[table->def] == NULL) { - table->tab[table->def]= - kmalloc(sizeof(struct gred_sched_data), GFP_KERNEL); - if (NULL == table->tab[table->def]) - return -ENOMEM; - - memset(table->tab[table->def], 0, - (sizeof(struct gred_sched_data))); - } - q= table->tab[table->def]; - q->DP=table->def; - q->Wlog = ctl->Wlog; - q->Plog = ctl->Plog; - q->limit = ctl->limit; - q->Scell_log = ctl->Scell_log; - q->Rmask = ctl->Plog < 32 ? ((1<<ctl->Plog) - 1) : ~0UL; - q->Scell_max = (255<<q->Scell_log); - q->qth_min = ctl->qth_min<<ctl->Wlog; - q->qth_max = ctl->qth_max<<ctl->Wlog; - - if (gred_rio_mode(table)) - q->prio=table->tab[ctl->DP]->prio; - else - q->prio=8; - - q->qcount = -1; - PSCHED_SET_PASTPERFECT(q->qidlestart); - memcpy(q->Stab, RTA_DATA(tb[TCA_GRED_STAB-1]), 256); - } - return 0; + err = 0; +errout_locked: + sch_tree_unlock(sch); +errout: + return err; } static int gred_init(struct Qdisc *sch, struct rtattr *opt) |
