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Diffstat (limited to 'net/sched/sch_htb.c')
-rw-r--r--net/sched/sch_htb.c91
1 files changed, 51 insertions, 40 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 863846cc551..9f949abcace 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -219,11 +219,16 @@ static struct htb_class *htb_classify(struct sk_buff *skb, struct Qdisc *sch,
if (skb->priority == sch->handle)
return HTB_DIRECT; /* X:0 (direct flow) selected */
cl = htb_find(skb->priority, sch);
- if (cl && cl->level == 0)
- return cl;
+ if (cl) {
+ if (cl->level == 0)
+ return cl;
+ /* Start with inner filter chain if a non-leaf class is selected */
+ tcf = cl->filter_list;
+ } else {
+ tcf = q->filter_list;
+ }
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
- tcf = q->filter_list;
while (tcf && (result = tc_classify(skb, tcf, &res)) >= 0) {
#ifdef CONFIG_NET_CLS_ACT
switch (result) {
@@ -712,7 +717,7 @@ static s64 htb_do_events(struct htb_sched *q, const int level,
/* too much load - let's continue after a break for scheduling */
if (!(q->warned & HTB_WARN_TOOMANYEVENTS)) {
- pr_warning("htb: too many events!\n");
+ pr_warn("htb: too many events!\n");
q->warned |= HTB_WARN_TOOMANYEVENTS;
}
@@ -997,6 +1002,8 @@ static const struct nla_policy htb_policy[TCA_HTB_MAX + 1] = {
[TCA_HTB_CTAB] = { .type = NLA_BINARY, .len = TC_RTAB_SIZE },
[TCA_HTB_RTAB] = { .type = NLA_BINARY, .len = TC_RTAB_SIZE },
[TCA_HTB_DIRECT_QLEN] = { .type = NLA_U32 },
+ [TCA_HTB_RATE64] = { .type = NLA_U64 },
+ [TCA_HTB_CEIL64] = { .type = NLA_U64 },
};
static void htb_work_func(struct work_struct *work)
@@ -1055,12 +1062,13 @@ static int htb_init(struct Qdisc *sch, struct nlattr *opt)
static int htb_dump(struct Qdisc *sch, struct sk_buff *skb)
{
- spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
struct htb_sched *q = qdisc_priv(sch);
struct nlattr *nest;
struct tc_htb_glob gopt;
- spin_lock_bh(root_lock);
+ /* Its safe to not acquire qdisc lock. As we hold RTNL,
+ * no change can happen on the qdisc parameters.
+ */
gopt.direct_pkts = q->direct_pkts;
gopt.version = HTB_VER;
@@ -1074,13 +1082,10 @@ static int htb_dump(struct Qdisc *sch, struct sk_buff *skb)
if (nla_put(skb, TCA_HTB_INIT, sizeof(gopt), &gopt) ||
nla_put_u32(skb, TCA_HTB_DIRECT_QLEN, q->direct_qlen))
goto nla_put_failure;
- nla_nest_end(skb, nest);
- spin_unlock_bh(root_lock);
- return skb->len;
+ return nla_nest_end(skb, nest);
nla_put_failure:
- spin_unlock_bh(root_lock);
nla_nest_cancel(skb, nest);
return -1;
}
@@ -1089,11 +1094,12 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
struct sk_buff *skb, struct tcmsg *tcm)
{
struct htb_class *cl = (struct htb_class *)arg;
- spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
struct nlattr *nest;
struct tc_htb_opt opt;
- spin_lock_bh(root_lock);
+ /* Its safe to not acquire qdisc lock. As we hold RTNL,
+ * no change can happen on the class parameters.
+ */
tcm->tcm_parent = cl->parent ? cl->parent->common.classid : TC_H_ROOT;
tcm->tcm_handle = cl->common.classid;
if (!cl->level && cl->un.leaf.q)
@@ -1114,13 +1120,16 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
opt.level = cl->level;
if (nla_put(skb, TCA_HTB_PARMS, sizeof(opt), &opt))
goto nla_put_failure;
+ if ((cl->rate.rate_bytes_ps >= (1ULL << 32)) &&
+ nla_put_u64(skb, TCA_HTB_RATE64, cl->rate.rate_bytes_ps))
+ goto nla_put_failure;
+ if ((cl->ceil.rate_bytes_ps >= (1ULL << 32)) &&
+ nla_put_u64(skb, TCA_HTB_CEIL64, cl->ceil.rate_bytes_ps))
+ goto nla_put_failure;
- nla_nest_end(skb, nest);
- spin_unlock_bh(root_lock);
- return skb->len;
+ return nla_nest_end(skb, nest);
nla_put_failure:
- spin_unlock_bh(root_lock);
nla_nest_cancel(skb, nest);
return -1;
}
@@ -1268,9 +1277,10 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg)
struct Qdisc *new_q = NULL;
int last_child = 0;
- // TODO: why don't allow to delete subtree ? references ? does
- // tc subsys quarantee us that in htb_destroy it holds no class
- // refs so that we can remove children safely there ?
+ /* TODO: why don't allow to delete subtree ? references ? does
+ * tc subsys guarantee us that in htb_destroy it holds no class
+ * refs so that we can remove children safely there ?
+ */
if (cl->children || cl->filter_cnt)
return -EBUSY;
@@ -1329,9 +1339,9 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
struct htb_sched *q = qdisc_priv(sch);
struct htb_class *cl = (struct htb_class *)*arg, *parent;
struct nlattr *opt = tca[TCA_OPTIONS];
- struct qdisc_rate_table *rtab = NULL, *ctab = NULL;
struct nlattr *tb[TCA_HTB_MAX + 1];
struct tc_htb_opt *hopt;
+ u64 rate64, ceil64;
/* extract all subattrs from opt attr */
if (!opt)
@@ -1352,16 +1362,11 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
goto failure;
/* Keeping backward compatible with rate_table based iproute2 tc */
- if (hopt->rate.linklayer == TC_LINKLAYER_UNAWARE) {
- rtab = qdisc_get_rtab(&hopt->rate, tb[TCA_HTB_RTAB]);
- if (rtab)
- qdisc_put_rtab(rtab);
- }
- if (hopt->ceil.linklayer == TC_LINKLAYER_UNAWARE) {
- ctab = qdisc_get_rtab(&hopt->ceil, tb[TCA_HTB_CTAB]);
- if (ctab)
- qdisc_put_rtab(ctab);
- }
+ if (hopt->rate.linklayer == TC_LINKLAYER_UNAWARE)
+ qdisc_put_rtab(qdisc_get_rtab(&hopt->rate, tb[TCA_HTB_RTAB]));
+
+ if (hopt->ceil.linklayer == TC_LINKLAYER_UNAWARE)
+ qdisc_put_rtab(qdisc_get_rtab(&hopt->ceil, tb[TCA_HTB_CTAB]));
if (!cl) { /* new class */
struct Qdisc *new_q;
@@ -1468,21 +1473,30 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
sch_tree_lock(sch);
}
+ rate64 = tb[TCA_HTB_RATE64] ? nla_get_u64(tb[TCA_HTB_RATE64]) : 0;
+
+ ceil64 = tb[TCA_HTB_CEIL64] ? nla_get_u64(tb[TCA_HTB_CEIL64]) : 0;
+
+ psched_ratecfg_precompute(&cl->rate, &hopt->rate, rate64);
+ psched_ratecfg_precompute(&cl->ceil, &hopt->ceil, ceil64);
+
/* it used to be a nasty bug here, we have to check that node
* is really leaf before changing cl->un.leaf !
*/
if (!cl->level) {
- cl->quantum = hopt->rate.rate / q->rate2quantum;
+ u64 quantum = cl->rate.rate_bytes_ps;
+
+ do_div(quantum, q->rate2quantum);
+ cl->quantum = min_t(u64, quantum, INT_MAX);
+
if (!hopt->quantum && cl->quantum < 1000) {
- pr_warning(
- "HTB: quantum of class %X is small. Consider r2q change.\n",
- cl->common.classid);
+ pr_warn("HTB: quantum of class %X is small. Consider r2q change.\n",
+ cl->common.classid);
cl->quantum = 1000;
}
if (!hopt->quantum && cl->quantum > 200000) {
- pr_warning(
- "HTB: quantum of class %X is big. Consider r2q change.\n",
- cl->common.classid);
+ pr_warn("HTB: quantum of class %X is big. Consider r2q change.\n",
+ cl->common.classid);
cl->quantum = 200000;
}
if (hopt->quantum)
@@ -1491,9 +1505,6 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
cl->prio = TC_HTB_NUMPRIO - 1;
}
- psched_ratecfg_precompute(&cl->rate, &hopt->rate);
- psched_ratecfg_precompute(&cl->ceil, &hopt->ceil);
-
cl->buffer = PSCHED_TICKS2NS(hopt->buffer);
cl->cbuffer = PSCHED_TICKS2NS(hopt->cbuffer);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 08:24:44 +0000