| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 2 Dec 2008 08:56:48 +0000
From: Jarek Poplawski <jarkao2@...il.com>
To: David Miller <davem@...emloft.net>
Cc: Martin Devera <devik@....cz>, Patrick McHardy <kaber@...sh.net>,
netdev@...r.kernel.org
Subject: [PATCH 3/3] pkt_sched: sch_htb: Clean htb_class prio and quantum
fields
While implementing htb_parent_to_leaf() there where added backup prio
and quantum struct htb_class fields to preserve these values for inner
classes in case of their return to leaf. This patch cleans this a bit
by removing union leaf duplicates.
Signed-off-by: Jarek Poplawski <jarkao2@...il.com>
---
net/sched/sch_htb.c | 41 ++++++++++++++++-------------------------
1 files changed, 16 insertions(+), 25 deletions(-)
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 7a71e94..80cb94d 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -84,11 +84,12 @@ struct htb_class {
unsigned int children;
struct htb_class *parent; /* parent class */
+ int prio; /* these two are used only by leaves... */
+ int quantum; /* but stored for parent-to-leaf return */
+
union {
struct htb_class_leaf {
struct Qdisc *q;
- int prio;
- int quantum;
int deficit[TC_HTB_MAXDEPTH];
struct list_head drop_list;
} leaf;
@@ -122,10 +123,6 @@ struct htb_class {
psched_tdiff_t mbuffer; /* max wait time */
long tokens, ctokens; /* current number of tokens */
psched_time_t t_c; /* checkpoint time */
-
- int prio; /* For parent to leaf return possible here */
- int quantum; /* we do backup. Finally full replacement */
- /* of un.leaf originals should be done. */
};
static inline long L2T(struct htb_class *cl, struct qdisc_rate_table *rate,
@@ -523,10 +520,10 @@ 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);
if (!cl->prio_activity) {
- cl->prio_activity = 1 << cl->un.leaf.prio;
+ cl->prio_activity = 1 << cl->prio;
htb_activate_prios(q, cl);
list_add_tail(&cl->un.leaf.drop_list,
- q->drops + cl->un.leaf.prio);
+ q->drops + cl->prio);
}
}
@@ -816,7 +813,7 @@ next:
if (likely(skb != NULL)) {
cl->un.leaf.deficit[level] -= qdisc_pkt_len(skb);
if (cl->un.leaf.deficit[level] < 0) {
- cl->un.leaf.deficit[level] += cl->un.leaf.quantum;
+ cl->un.leaf.deficit[level] += cl->quantum;
htb_next_rb_node((level ? cl->parent->un.inner.ptr : q->
ptr[0]) + prio);
}
@@ -1050,8 +1047,8 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
opt.buffer = cl->buffer;
opt.ceil = cl->ceil->rate;
opt.cbuffer = cl->cbuffer;
- opt.quantum = cl->un.leaf.quantum;
- opt.prio = cl->un.leaf.prio;
+ opt.quantum = cl->quantum;
+ opt.prio = cl->prio;
opt.level = cl->level;
NLA_PUT(skb, TCA_HTB_PARMS, sizeof(opt), &opt);
@@ -1155,8 +1152,6 @@ static void htb_parent_to_leaf(struct htb_sched *q, struct htb_class *cl,
memset(&parent->un.inner, 0, sizeof(parent->un.inner));
INIT_LIST_HEAD(&parent->un.leaf.drop_list);
parent->un.leaf.q = new_q ? new_q : &noop_qdisc;
- parent->un.leaf.quantum = parent->quantum;
- parent->un.leaf.prio = parent->prio;
parent->tokens = parent->buffer;
parent->ctokens = parent->cbuffer;
parent->t_c = psched_get_time();
@@ -1400,27 +1395,23 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
/* 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->un.leaf.quantum = rtab->rate.rate / q->rate2quantum;
- if (!hopt->quantum && cl->un.leaf.quantum < 1000) {
+ cl->quantum = rtab->rate.rate / q->rate2quantum;
+ if (!hopt->quantum && cl->quantum < 1000) {
printk(KERN_WARNING
"HTB: quantum of class %X is small. Consider r2q change.\n",
cl->common.classid);
- cl->un.leaf.quantum = 1000;
+ cl->quantum = 1000;
}
- if (!hopt->quantum && cl->un.leaf.quantum > 200000) {
+ if (!hopt->quantum && cl->quantum > 200000) {
printk(KERN_WARNING
"HTB: quantum of class %X is big. Consider r2q change.\n",
cl->common.classid);
- cl->un.leaf.quantum = 200000;
+ cl->quantum = 200000;
}
if (hopt->quantum)
- cl->un.leaf.quantum = hopt->quantum;
- if ((cl->un.leaf.prio = hopt->prio) >= TC_HTB_NUMPRIO)
- cl->un.leaf.prio = TC_HTB_NUMPRIO - 1;
-
- /* backup for htb_parent_to_leaf */
- cl->quantum = cl->un.leaf.quantum;
- cl->prio = cl->un.leaf.prio;
+ cl->quantum = hopt->quantum;
+ if ((cl->prio = hopt->prio) >= TC_HTB_NUMPRIO)
+ cl->prio = TC_HTB_NUMPRIO - 1;
}
cl->buffer = hopt->buffer;
--
1.5.6.5
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists