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Date: Tue, 1 Jul 2008 16:34:13 +0200 (MEST)
From: Patrick McHardy <kaber@...sh.net>
To: netdev@...r.kernel.org
Cc: devik@....cz, Patrick McHardy <kaber@...sh.net>
Subject: net-sched 02/05: sch_hfsc: use dynamic class hash helpers
net-sched: sch_hfsc: use dynamic class hash helpers
Signed-off-by: Patrick McHardy <kaber@...sh.net>
---
commit 894a1f0874e239e431ec524eb10782d577a0a6d3
tree 0ef83fbe4f09c1b4eab86cee111481ed33053de3
parent fe2579f858479ce266763ba861c87cd0371389af
author Patrick McHardy <kaber@...sh.net> Tue, 01 Jul 2008 14:02:55 +0200
committer Patrick McHardy <kaber@...sh.net> Tue, 01 Jul 2008 14:02:55 +0200
net/sched/sch_hfsc.c | 90 +++++++++++++++++++++++++++-----------------------
1 files changed, 49 insertions(+), 41 deletions(-)
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index e817aa0..dc9bbe3 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -113,7 +113,7 @@ enum hfsc_class_flags
struct hfsc_class
{
- u32 classid; /* class id */
+ struct Qdisc_class_common cl_common;
unsigned int refcnt; /* usage count */
struct gnet_stats_basic bstats;
@@ -134,7 +134,6 @@ struct hfsc_class
struct rb_node vt_node; /* parent's vt_tree member */
struct rb_root cf_tree; /* active children sorted by cl_f */
struct rb_node cf_node; /* parent's cf_heap member */
- struct list_head hlist; /* hash list member */
struct list_head dlist; /* drop list member */
u64 cl_total; /* total work in bytes */
@@ -177,13 +176,11 @@ struct hfsc_class
unsigned long cl_nactive; /* number of active children */
};
-#define HFSC_HSIZE 16
-
struct hfsc_sched
{
u16 defcls; /* default class id */
struct hfsc_class root; /* root class */
- struct list_head clhash[HFSC_HSIZE]; /* class hash */
+ struct Qdisc_class_hash clhash; /* class hash */
struct rb_root eligible; /* eligible tree */
struct list_head droplist; /* active leaf class list (for
dropping) */
@@ -933,26 +930,16 @@ hfsc_adjust_levels(struct hfsc_class *cl)
} while ((cl = cl->cl_parent) != NULL);
}
-static inline unsigned int
-hfsc_hash(u32 h)
-{
- h ^= h >> 8;
- h ^= h >> 4;
-
- return h & (HFSC_HSIZE - 1);
-}
-
static inline struct hfsc_class *
hfsc_find_class(u32 classid, struct Qdisc *sch)
{
struct hfsc_sched *q = qdisc_priv(sch);
- struct hfsc_class *cl;
+ struct Qdisc_class_common *clc;
- list_for_each_entry(cl, &q->clhash[hfsc_hash(classid)], hlist) {
- if (cl->classid == classid)
- return cl;
- }
- return NULL;
+ clc = qdisc_class_find(&q->clhash, classid);
+ if (clc == NULL)
+ return NULL;
+ return container_of(clc, struct hfsc_class, cl_common);
}
static void
@@ -1032,7 +1019,8 @@ hfsc_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
if (cl != NULL) {
if (parentid) {
- if (cl->cl_parent && cl->cl_parent->classid != parentid)
+ if (cl->cl_parent &&
+ cl->cl_parent->cl_common.classid != parentid)
return -EINVAL;
if (cl->cl_parent == NULL && parentid != TC_H_ROOT)
return -EINVAL;
@@ -1091,8 +1079,8 @@ hfsc_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
if (usc != NULL)
hfsc_change_usc(cl, usc, 0);
+ cl->cl_common.classid = classid;
cl->refcnt = 1;
- cl->classid = classid;
cl->sched = q;
cl->cl_parent = parent;
cl->qdisc = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, classid);
@@ -1103,7 +1091,7 @@ hfsc_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
cl->cf_tree = RB_ROOT;
sch_tree_lock(sch);
- list_add_tail(&cl->hlist, &q->clhash[hfsc_hash(classid)]);
+ qdisc_class_hash_insert(&q->clhash, &cl->cl_common);
list_add_tail(&cl->siblings, &parent->children);
if (parent->level == 0)
hfsc_purge_queue(sch, parent);
@@ -1111,6 +1099,8 @@ hfsc_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
cl->cl_pcvtoff = parent->cl_cvtoff;
sch_tree_unlock(sch);
+ qdisc_class_hash_grow(sch, &q->clhash);
+
if (tca[TCA_RATE])
gen_new_estimator(&cl->bstats, &cl->rate_est,
&sch->dev->queue_lock, tca[TCA_RATE]);
@@ -1145,7 +1135,7 @@ hfsc_delete_class(struct Qdisc *sch, unsigned long arg)
hfsc_adjust_levels(cl->cl_parent);
hfsc_purge_queue(sch, cl);
- list_del(&cl->hlist);
+ qdisc_class_hash_remove(&q->clhash, &cl->cl_common);
if (--cl->refcnt == 0)
hfsc_destroy_class(sch, cl);
@@ -1212,7 +1202,7 @@ hfsc_graft_class(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
return -EINVAL;
if (new == NULL) {
new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops,
- cl->classid);
+ cl->cl_common.classid);
if (new == NULL)
new = &noop_qdisc;
}
@@ -1345,8 +1335,9 @@ hfsc_dump_class(struct Qdisc *sch, unsigned long arg, struct sk_buff *skb,
struct hfsc_class *cl = (struct hfsc_class *)arg;
struct nlattr *nest;
- tcm->tcm_parent = cl->cl_parent ? cl->cl_parent->classid : TC_H_ROOT;
- tcm->tcm_handle = cl->classid;
+ tcm->tcm_parent = cl->cl_parent ? cl->cl_parent->cl_common.classid :
+ TC_H_ROOT;
+ tcm->tcm_handle = cl->cl_common.classid;
if (cl->level == 0)
tcm->tcm_info = cl->qdisc->handle;
@@ -1390,18 +1381,21 @@ static void
hfsc_walk(struct Qdisc *sch, struct qdisc_walker *arg)
{
struct hfsc_sched *q = qdisc_priv(sch);
+ struct Qdisc_class_common *clc;
+ struct hlist_node *n;
struct hfsc_class *cl;
unsigned int i;
if (arg->stop)
return;
- for (i = 0; i < HFSC_HSIZE; i++) {
- list_for_each_entry(cl, &q->clhash[i], hlist) {
+ for (i = 0; i < q->clhash.hashsize; i++) {
+ hlist_for_each_entry(clc, n, &q->clhash.hash[i], hnode) {
if (arg->count < arg->skip) {
arg->count++;
continue;
}
+ cl = container_of(clc, struct hfsc_class, cl_common);
if (arg->fn(sch, (unsigned long)cl, arg) < 0) {
arg->stop = 1;
return;
@@ -1433,21 +1427,22 @@ hfsc_init_qdisc(struct Qdisc *sch, struct nlattr *opt)
{
struct hfsc_sched *q = qdisc_priv(sch);
struct tc_hfsc_qopt *qopt;
- unsigned int i;
+ int err;
if (opt == NULL || nla_len(opt) < sizeof(*qopt))
return -EINVAL;
qopt = nla_data(opt);
q->defcls = qopt->defcls;
- for (i = 0; i < HFSC_HSIZE; i++)
- INIT_LIST_HEAD(&q->clhash[i]);
+ err = qdisc_class_hash_init(&q->clhash);
+ if (err < 0)
+ return err;
q->eligible = RB_ROOT;
INIT_LIST_HEAD(&q->droplist);
skb_queue_head_init(&q->requeue);
+ q->root.cl_common.classid = sch->handle;
q->root.refcnt = 1;
- q->root.classid = sch->handle;
q->root.sched = q;
q->root.qdisc = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops,
sch->handle);
@@ -1457,7 +1452,8 @@ hfsc_init_qdisc(struct Qdisc *sch, struct nlattr *opt)
q->root.vt_tree = RB_ROOT;
q->root.cf_tree = RB_ROOT;
- list_add(&q->root.hlist, &q->clhash[hfsc_hash(q->root.classid)]);
+ qdisc_class_hash_insert(&q->clhash, &q->root.cl_common);
+ qdisc_class_hash_grow(sch, &q->clhash);
qdisc_watchdog_init(&q->watchdog, sch);
@@ -1519,12 +1515,16 @@ static void
hfsc_reset_qdisc(struct Qdisc *sch)
{
struct hfsc_sched *q = qdisc_priv(sch);
+ struct Qdisc_class_common *clc;
+ struct hlist_node *n;
struct hfsc_class *cl;
unsigned int i;
- for (i = 0; i < HFSC_HSIZE; i++) {
- list_for_each_entry(cl, &q->clhash[i], hlist)
+ for (i = 0; i < q->clhash.hashsize; i++) {
+ hlist_for_each_entry(clc, n, &q->clhash.hash[i], hnode) {
+ cl = container_of(clc, struct hfsc_class, cl_common);
hfsc_reset_class(cl);
+ }
}
__skb_queue_purge(&q->requeue);
q->eligible = RB_ROOT;
@@ -1537,17 +1537,25 @@ static void
hfsc_destroy_qdisc(struct Qdisc *sch)
{
struct hfsc_sched *q = qdisc_priv(sch);
- struct hfsc_class *cl, *next;
+ struct Qdisc_class_common *clc;
+ struct hlist_node *n, *next;
+ struct hfsc_class *cl;
unsigned int i;
- for (i = 0; i < HFSC_HSIZE; i++) {
- list_for_each_entry(cl, &q->clhash[i], hlist)
+ for (i = 0; i < q->clhash.hashsize; i++) {
+ hlist_for_each_entry(clc, n, &q->clhash.hash[i], hnode) {
+ cl = container_of(clc, struct hfsc_class, cl_common);
tcf_destroy_chain(&cl->filter_list);
+ }
}
- for (i = 0; i < HFSC_HSIZE; i++) {
- list_for_each_entry_safe(cl, next, &q->clhash[i], hlist)
+ for (i = 0; i < q->clhash.hashsize; i++) {
+ hlist_for_each_entry_safe(clc, n, next, &q->clhash.hash[i],
+ hnode) {
+ cl = container_of(clc, struct hfsc_class, cl_common);
hfsc_destroy_class(sch, cl);
+ }
}
+ qdisc_class_hash_destroy(&q->clhash);
__skb_queue_purge(&q->requeue);
qdisc_watchdog_cancel(&q->watchdog);
}
--
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