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htb: use anonymous union for simplicity

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cl->leaf.q is slightly more readable than cl->un.leaf.q.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2018-09-07 13:29:14 -07:00 committed by David S. Miller
parent 8ecc7c8a1c
commit 11957be20f
1 changed files with 49 additions and 49 deletions
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98
net/sched/sch_htb.c
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@ -132,7 +132,7 @@ struct htb_class {
struct htb_class_inner {
struct htb_prio clprio[TC_HTB_NUMPRIO];
} inner;
} un;
};
s64 pq_key;
int prio_activity; /* for which prios are we active */
@ -411,13 +411,13 @@ static void htb_activate_prios(struct htb_sched *q, struct htb_class *cl)
int prio = ffz(~m);
m &= ~(1 << prio);
if (p->un.inner.clprio[prio].feed.rb_node)
if (p->inner.clprio[prio].feed.rb_node)
/* parent already has its feed in use so that
* reset bit in mask as parent is already ok
*/
mask &= ~(1 << prio);
htb_add_to_id_tree(&p->un.inner.clprio[prio].feed, cl, prio);
htb_add_to_id_tree(&p->inner.clprio[prio].feed, cl, prio);
}
p->prio_activity |= mask;
cl = p;
@ -447,19 +447,19 @@ static void htb_deactivate_prios(struct htb_sched *q, struct htb_class *cl)
int prio = ffz(~m);
m &= ~(1 << prio);
if (p->un.inner.clprio[prio].ptr == cl->node + prio) {
if (p->inner.clprio[prio].ptr == cl->node + prio) {
/* we are removing child which is pointed to from
* parent feed - forget the pointer but remember
* classid
*/
p->un.inner.clprio[prio].last_ptr_id = cl->common.classid;
p->un.inner.clprio[prio].ptr = NULL;
p->inner.clprio[prio].last_ptr_id = cl->common.classid;
p->inner.clprio[prio].ptr = NULL;
}
htb_safe_rb_erase(cl->node + prio,
&p->un.inner.clprio[prio].feed);
&p->inner.clprio[prio].feed);
if (!p->un.inner.clprio[prio].feed.rb_node)
if (!p->inner.clprio[prio].feed.rb_node)
mask |= 1 << prio;
}
@ -555,7 +555,7 @@ htb_change_class_mode(struct htb_sched *q, struct htb_class *cl, s64 *diff)
*/
static inline void htb_activate(struct htb_sched *q, struct htb_class *cl)
{
WARN_ON(cl->level || !cl->un.leaf.q || !cl->un.leaf.q->q.qlen);
WARN_ON(cl->level || !cl->leaf.q || !cl->leaf.q->q.qlen);
if (!cl->prio_activity) {
cl->prio_activity = 1 << cl->prio;
@ -599,7 +599,7 @@ static int htb_enqueue(struct sk_buff *skb, struct Qdisc *sch,
__qdisc_drop(skb, to_free);
return ret;
#endif
} else if ((ret = qdisc_enqueue(skb, cl->un.leaf.q,
} else if ((ret = qdisc_enqueue(skb, cl->leaf.q,
to_free)) != NET_XMIT_SUCCESS) {
if (net_xmit_drop_count(ret)) {
qdisc_qstats_drop(sch);
@ -807,7 +807,7 @@ static struct htb_class *htb_lookup_leaf(struct htb_prio *hprio, const int prio)
cl = rb_entry(*sp->pptr, struct htb_class, node[prio]);
if (!cl->level)
return cl;
clp = &cl->un.inner.clprio[prio];
clp = &cl->inner.clprio[prio];
(++sp)->root = clp->feed.rb_node;
sp->pptr = &clp->ptr;
sp->pid = &clp->last_ptr_id;
@ -841,7 +841,7 @@ next:
* graft operation on the leaf since last dequeue;
* simply deactivate and skip such class
*/
if (unlikely(cl->un.leaf.q->q.qlen == 0)) {
if (unlikely(cl->leaf.q->q.qlen == 0)) {
struct htb_class *next;
htb_deactivate(q, cl);
@ -857,12 +857,12 @@ next:
goto next;
}
skb = cl->un.leaf.q->dequeue(cl->un.leaf.q);
skb = cl->leaf.q->dequeue(cl->leaf.q);
if (likely(skb != NULL))
break;
qdisc_warn_nonwc("htb", cl->un.leaf.q);
htb_next_rb_node(level ? &cl->parent->un.inner.clprio[prio].ptr:
qdisc_warn_nonwc("htb", cl->leaf.q);
htb_next_rb_node(level ? &cl->parent->inner.clprio[prio].ptr:
&q->hlevel[0].hprio[prio].ptr);
cl = htb_lookup_leaf(hprio, prio);
@ -870,16 +870,16 @@ next:
if (likely(skb != NULL)) {
bstats_update(&cl->bstats, skb);
cl->un.leaf.deficit[level] -= qdisc_pkt_len(skb);
if (cl->un.leaf.deficit[level] < 0) {
cl->un.leaf.deficit[level] += cl->quantum;
htb_next_rb_node(level ? &cl->parent->un.inner.clprio[prio].ptr :
cl->leaf.deficit[level] -= qdisc_pkt_len(skb);
if (cl->leaf.deficit[level] < 0) {
cl->leaf.deficit[level] += cl->quantum;
htb_next_rb_node(level ? &cl->parent->inner.clprio[prio].ptr :
&q->hlevel[0].hprio[prio].ptr);
}
/* this used to be after charge_class but this constelation
* gives us slightly better performance
*/
if (!cl->un.leaf.q->q.qlen)
if (!cl->leaf.q->q.qlen)
htb_deactivate(q, cl);
htb_charge_class(q, cl, level, skb);
}
@ -956,10 +956,10 @@ static void htb_reset(struct Qdisc *sch)
for (i = 0; i < q->clhash.hashsize; i++) {
hlist_for_each_entry(cl, &q->clhash.hash[i], common.hnode) {
if (cl->level)
memset(&cl->un.inner, 0, sizeof(cl->un.inner));
memset(&cl->inner, 0, sizeof(cl->inner));
else {
if (cl->un.leaf.q)
qdisc_reset(cl->un.leaf.q);
if (cl->leaf.q)
qdisc_reset(cl->leaf.q);
}
cl->prio_activity = 0;
cl->cmode = HTB_CAN_SEND;
@ -1082,8 +1082,8 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
*/
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)
tcm->tcm_info = cl->un.leaf.q->handle;
if (!cl->level && cl->leaf.q)
tcm->tcm_info = cl->leaf.q->handle;
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
@ -1126,9 +1126,9 @@ htb_dump_class_stats(struct Qdisc *sch, unsigned long arg, struct gnet_dump *d)
};
__u32 qlen = 0;
if (!cl->level && cl->un.leaf.q) {
qlen = cl->un.leaf.q->q.qlen;
qs.backlog = cl->un.leaf.q->qstats.backlog;
if (!cl->level && cl->leaf.q) {
qlen = cl->leaf.q->q.qlen;
qs.backlog = cl->leaf.q->qstats.backlog;
}
cl->xstats.tokens = clamp_t(s64, PSCHED_NS2TICKS(cl->tokens),
INT_MIN, INT_MAX);
@ -1156,14 +1156,14 @@ static int htb_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
cl->common.classid, extack)) == NULL)
return -ENOBUFS;
*old = qdisc_replace(sch, new, &cl->un.leaf.q);
*old = qdisc_replace(sch, new, &cl->leaf.q);
return 0;
}
static struct Qdisc *htb_leaf(struct Qdisc *sch, unsigned long arg)
{
struct htb_class *cl = (struct htb_class *)arg;
return !cl->level ? cl->un.leaf.q : NULL;
return !cl->level ? cl->leaf.q : NULL;
}
static void htb_qlen_notify(struct Qdisc *sch, unsigned long arg)
@ -1189,15 +1189,15 @@ static void htb_parent_to_leaf(struct htb_sched *q, struct htb_class *cl,
{
struct htb_class *parent = cl->parent;
WARN_ON(cl->level || !cl->un.leaf.q || cl->prio_activity);
WARN_ON(cl->level || !cl->leaf.q || cl->prio_activity);
if (parent->cmode != HTB_CAN_SEND)
htb_safe_rb_erase(&parent->pq_node,
&q->hlevel[parent->level].wait_pq);
parent->level = 0;
memset(&parent->un.inner, 0, sizeof(parent->un.inner));
parent->un.leaf.q = new_q ? new_q : &noop_qdisc;
memset(&parent->inner, 0, sizeof(parent->inner));
parent->leaf.q = new_q ? new_q : &noop_qdisc;
parent->tokens = parent->buffer;
parent->ctokens = parent->cbuffer;
parent->t_c = ktime_get_ns();
@ -1207,8 +1207,8 @@ static void htb_parent_to_leaf(struct htb_sched *q, struct htb_class *cl,
static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl)
{
if (!cl->level) {
WARN_ON(!cl->un.leaf.q);
qdisc_destroy(cl->un.leaf.q);
WARN_ON(!cl->leaf.q);
qdisc_destroy(cl->leaf.q);
}
gen_kill_estimator(&cl->rate_est);
tcf_block_put(cl->block);
@ -1270,11 +1270,11 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg)
sch_tree_lock(sch);
if (!cl->level) {
unsigned int qlen = cl->un.leaf.q->q.qlen;
unsigned int backlog = cl->un.leaf.q->qstats.backlog;
unsigned int qlen = cl->leaf.q->q.qlen;
unsigned int backlog = cl->leaf.q->qstats.backlog;
qdisc_reset(cl->un.leaf.q);
qdisc_tree_reduce_backlog(cl->un.leaf.q, qlen, backlog);
qdisc_reset(cl->leaf.q);
qdisc_tree_reduce_backlog(cl->leaf.q, qlen, backlog);
}
/* delete from hash and active; remainder in destroy_class */
@ -1403,13 +1403,13 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
classid, NULL);
sch_tree_lock(sch);
if (parent && !parent->level) {
unsigned int qlen = parent->un.leaf.q->q.qlen;
unsigned int backlog = parent->un.leaf.q->qstats.backlog;
unsigned int qlen = parent->leaf.q->q.qlen;
unsigned int backlog = parent->leaf.q->qstats.backlog;
/* turn parent into inner node */
qdisc_reset(parent->un.leaf.q);
qdisc_tree_reduce_backlog(parent->un.leaf.q, qlen, backlog);
qdisc_destroy(parent->un.leaf.q);
qdisc_reset(parent->leaf.q);
qdisc_tree_reduce_backlog(parent->leaf.q, qlen, backlog);
qdisc_destroy(parent->leaf.q);
if (parent->prio_activity)
htb_deactivate(q, parent);
@ -1420,10 +1420,10 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
}
parent->level = (parent->parent ? parent->parent->level
: TC_HTB_MAXDEPTH) - 1;
memset(&parent->un.inner, 0, sizeof(parent->un.inner));
memset(&parent->inner, 0, sizeof(parent->inner));
}
/* leaf (we) needs elementary qdisc */
cl->un.leaf.q = new_q ? new_q : &noop_qdisc;
cl->leaf.q = new_q ? new_q : &noop_qdisc;
cl->common.classid = classid;
cl->parent = parent;
@ -1439,8 +1439,8 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
qdisc_class_hash_insert(&q->clhash, &cl->common);
if (parent)
parent->children++;
if (cl->un.leaf.q != &noop_qdisc)
qdisc_hash_add(cl->un.leaf.q, true);
if (cl->leaf.q != &noop_qdisc)
qdisc_hash_add(cl->leaf.q, true);
} else {
if (tca[TCA_RATE]) {
err = gen_replace_estimator(&cl->bstats, NULL,
@ -1462,7 +1462,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
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 !
* is really leaf before changing cl->leaf !
*/
if (!cl->level) {
u64 quantum = cl->rate.rate_bytes_ps;