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Diffstat (limited to 'net/sched/sch_htb.c')
-rw-r--r--net/sched/sch_htb.c92
1 files changed, 20 insertions, 72 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 51561eafcb72..571f1d211f4d 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -38,6 +38,7 @@
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <net/netlink.h>
+#include <net/sch_generic.h>
#include <net/pkt_sched.h>
/* HTB algorithm.
@@ -71,12 +72,6 @@ enum htb_cmode {
HTB_CAN_SEND /* class can send */
};
-struct htb_rate_cfg {
- u64 rate_bps;
- u32 mult;
- u32 shift;
-};
-
/* interior & leaf nodes; props specific to leaves are marked L: */
struct htb_class {
struct Qdisc_class_common common;
@@ -124,8 +119,8 @@ struct htb_class {
int filter_cnt;
/* token bucket parameters */
- struct htb_rate_cfg rate;
- struct htb_rate_cfg ceil;
+ struct psched_ratecfg rate;
+ struct psched_ratecfg ceil;
s64 buffer, cbuffer; /* token bucket depth/rate */
psched_tdiff_t mbuffer; /* max wait time */
s64 tokens, ctokens; /* current number of tokens */
@@ -168,45 +163,6 @@ struct htb_sched {
struct work_struct work;
};
-static u64 l2t_ns(struct htb_rate_cfg *r, unsigned int len)
-{
- return ((u64)len * r->mult) >> r->shift;
-}
-
-static void htb_precompute_ratedata(struct htb_rate_cfg *r)
-{
- u64 factor;
- u64 mult;
- int shift;
-
- r->shift = 0;
- r->mult = 1;
- /*
- * Calibrate mult, shift so that token counting is accurate
- * for smallest packet size (64 bytes). Token (time in ns) is
- * computed as (bytes * 8) * NSEC_PER_SEC / rate_bps. It will
- * work as long as the smallest packet transfer time can be
- * accurately represented in nanosec.
- */
- if (r->rate_bps > 0) {
- /*
- * Higher shift gives better accuracy. Find the largest
- * shift such that mult fits in 32 bits.
- */
- for (shift = 0; shift < 16; shift++) {
- r->shift = shift;
- factor = 8LLU * NSEC_PER_SEC * (1 << r->shift);
- mult = div64_u64(factor, r->rate_bps);
- if (mult > UINT_MAX)
- break;
- }
-
- r->shift = shift - 1;
- factor = 8LLU * NSEC_PER_SEC * (1 << r->shift);
- r->mult = div64_u64(factor, r->rate_bps);
- }
-}
-
/* find class in global hash table using given handle */
static inline struct htb_class *htb_find(u32 handle, struct Qdisc *sch)
{
@@ -632,7 +588,7 @@ static inline void htb_accnt_tokens(struct htb_class *cl, int bytes, s64 diff)
if (toks > cl->buffer)
toks = cl->buffer;
- toks -= (s64) l2t_ns(&cl->rate, bytes);
+ toks -= (s64) psched_l2t_ns(&cl->rate, bytes);
if (toks <= -cl->mbuffer)
toks = 1 - cl->mbuffer;
@@ -645,7 +601,7 @@ static inline void htb_accnt_ctokens(struct htb_class *cl, int bytes, s64 diff)
if (toks > cl->cbuffer)
toks = cl->cbuffer;
- toks -= (s64) l2t_ns(&cl->ceil, bytes);
+ toks -= (s64) psched_l2t_ns(&cl->ceil, bytes);
if (toks <= -cl->mbuffer)
toks = 1 - cl->mbuffer;
@@ -993,11 +949,10 @@ static void htb_reset(struct Qdisc *sch)
{
struct htb_sched *q = qdisc_priv(sch);
struct htb_class *cl;
- struct hlist_node *n;
unsigned int i;
for (i = 0; i < q->clhash.hashsize; i++) {
- hlist_for_each_entry(cl, n, &q->clhash.hash[i], common.hnode) {
+ hlist_for_each_entry(cl, &q->clhash.hash[i], common.hnode) {
if (cl->level)
memset(&cl->un.inner, 0, sizeof(cl->un.inner));
else {
@@ -1134,10 +1089,10 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
memset(&opt, 0, sizeof(opt));
- opt.rate.rate = cl->rate.rate_bps >> 3;
- opt.buffer = cl->buffer;
- opt.ceil.rate = cl->ceil.rate_bps >> 3;
- opt.cbuffer = cl->cbuffer;
+ opt.rate.rate = psched_ratecfg_getrate(&cl->rate);
+ opt.buffer = PSCHED_NS2TICKS(cl->buffer);
+ opt.ceil.rate = psched_ratecfg_getrate(&cl->ceil);
+ opt.cbuffer = PSCHED_NS2TICKS(cl->cbuffer);
opt.quantum = cl->quantum;
opt.prio = cl->prio;
opt.level = cl->level;
@@ -1262,7 +1217,7 @@ static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl)
static void htb_destroy(struct Qdisc *sch)
{
struct htb_sched *q = qdisc_priv(sch);
- struct hlist_node *n, *next;
+ struct hlist_node *next;
struct htb_class *cl;
unsigned int i;
@@ -1276,11 +1231,11 @@ static void htb_destroy(struct Qdisc *sch)
tcf_destroy_chain(&q->filter_list);
for (i = 0; i < q->clhash.hashsize; i++) {
- hlist_for_each_entry(cl, n, &q->clhash.hash[i], common.hnode)
+ hlist_for_each_entry(cl, &q->clhash.hash[i], common.hnode)
tcf_destroy_chain(&cl->filter_list);
}
for (i = 0; i < q->clhash.hashsize; i++) {
- hlist_for_each_entry_safe(cl, n, next, &q->clhash.hash[i],
+ hlist_for_each_entry_safe(cl, next, &q->clhash.hash[i],
common.hnode)
htb_destroy_class(sch, cl);
}
@@ -1459,8 +1414,8 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
cl->parent = parent;
/* set class to be in HTB_CAN_SEND state */
- cl->tokens = hopt->buffer;
- cl->ctokens = hopt->cbuffer;
+ cl->tokens = PSCHED_TICKS2NS(hopt->buffer);
+ cl->ctokens = PSCHED_TICKS2NS(hopt->cbuffer);
cl->mbuffer = 60 * PSCHED_TICKS_PER_SEC; /* 1min */
cl->t_c = psched_get_time();
cl->cmode = HTB_CAN_SEND;
@@ -1503,17 +1458,11 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
cl->prio = TC_HTB_NUMPRIO - 1;
}
- cl->buffer = hopt->buffer;
- cl->cbuffer = hopt->cbuffer;
-
- cl->rate.rate_bps = (u64)hopt->rate.rate << 3;
- cl->ceil.rate_bps = (u64)hopt->ceil.rate << 3;
-
- htb_precompute_ratedata(&cl->rate);
- htb_precompute_ratedata(&cl->ceil);
+ psched_ratecfg_precompute(&cl->rate, hopt->rate.rate);
+ psched_ratecfg_precompute(&cl->ceil, hopt->ceil.rate);
- cl->buffer = hopt->buffer << PSCHED_SHIFT;
- cl->cbuffer = hopt->buffer << PSCHED_SHIFT;
+ cl->buffer = PSCHED_TICKS2NS(hopt->buffer);
+ cl->cbuffer = PSCHED_TICKS2NS(hopt->buffer);
sch_tree_unlock(sch);
@@ -1566,14 +1515,13 @@ static void htb_walk(struct Qdisc *sch, struct qdisc_walker *arg)
{
struct htb_sched *q = qdisc_priv(sch);
struct htb_class *cl;
- struct hlist_node *n;
unsigned int i;
if (arg->stop)
return;
for (i = 0; i < q->clhash.hashsize; i++) {
- hlist_for_each_entry(cl, n, &q->clhash.hash[i], common.hnode) {
+ hlist_for_each_entry(cl, &q->clhash.hash[i], common.hnode) {
if (arg->count < arg->skip) {
arg->count++;
continue;
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-14 12:35:53 +0300