+++ /dev/null
-/*
- * Codel - The Controlled-Delay Active Queue Management algorithm
- *
- * Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com>
- * Copyright (C) 2011-2012 Van Jacobson <van@pollere.net>
- *
- * Implemented on linux by :
- * Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net>
- * Copyright (C) 2012 Eric Dumazet <edumazet@google.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the authors may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * Alternatively, provided that this notice is retained in full, this
- * software may be distributed under the terms of the GNU General
- * Public License ("GPL") version 2, in which case the provisions of the
- * GPL apply INSTEAD OF those given above.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/skbuff.h>
-#include <linux/prefetch.h>
-#include <net/pkt_sched.h>
-#include <net/codel.h>
-
-
-#define DEFAULT_CODEL_LIMIT 1000
-
-struct codel_sched_data {
- struct codel_params params;
- struct codel_vars vars;
- struct codel_stats stats;
- u32 drop_overlimit;
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
- u32 limit;
-#endif
-};
-
-/* This is the specific function called from codel_dequeue()
- * to dequeue a packet from queue. Note: backlog is handled in
- * codel, we dont need to reduce it here.
- */
-static struct sk_buff *dequeue(struct codel_vars *vars, struct Qdisc *sch)
-{
- struct sk_buff *skb = __skb_dequeue(&sch->q);
-
- prefetch(&skb->end); /* we'll need skb_shinfo() */
- return skb;
-}
-
-static struct sk_buff *codel_qdisc_dequeue(struct Qdisc *sch)
-{
- struct codel_sched_data *q = qdisc_priv(sch);
- struct sk_buff *skb;
-
- skb = codel_dequeue(sch, &q->params, &q->vars, &q->stats, dequeue);
-
- /* We cant call qdisc_tree_decrease_qlen() if our qlen is 0,
- * or HTB crashes. Defer it for next round.
- */
- if (q->stats.drop_count && sch->q.qlen) {
- qdisc_tree_decrease_qlen(sch, q->stats.drop_count);
- q->stats.drop_count = 0;
- }
- if (skb)
- qdisc_bstats_update(sch, skb);
- return skb;
-}
-
-static int codel_qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
-{
- struct codel_sched_data *q;
-
- q = qdisc_priv(sch);
-
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
- if (likely(qdisc_qlen(sch) < q->limit)) {
-#else
- if (likely(qdisc_qlen(sch) < sch->limit)) {
-#endif
- codel_set_enqueue_time(skb);
- return qdisc_enqueue_tail(skb, sch);
- }
- q->drop_overlimit++;
- return qdisc_drop(skb, sch);
-}
-
-static const struct nla_policy codel_policy[TCA_CODEL_MAX + 1] = {
- [TCA_CODEL_TARGET] = { .type = NLA_U32 },
- [TCA_CODEL_LIMIT] = { .type = NLA_U32 },
- [TCA_CODEL_INTERVAL] = { .type = NLA_U32 },
- [TCA_CODEL_ECN] = { .type = NLA_U32 },
-};
-
-static int codel_change(struct Qdisc *sch, struct nlattr *opt)
-{
- struct codel_sched_data *q = qdisc_priv(sch);
- struct nlattr *tb[TCA_CODEL_MAX + 1];
- unsigned int qlen;
- int err;
-
- if (!opt)
- return -EINVAL;
-
- err = nla_parse_nested(tb, TCA_CODEL_MAX, opt, codel_policy);
- if (err < 0)
- return err;
-
- sch_tree_lock(sch);
-
- if (tb[TCA_CODEL_TARGET]) {
- u32 target = nla_get_u32(tb[TCA_CODEL_TARGET]);
-
- q->params.target = ((u64)target * NSEC_PER_USEC) >> CODEL_SHIFT;
- }
-
- if (tb[TCA_CODEL_INTERVAL]) {
- u32 interval = nla_get_u32(tb[TCA_CODEL_INTERVAL]);
-
- q->params.interval = ((u64)interval * NSEC_PER_USEC) >> CODEL_SHIFT;
- }
-
- if (tb[TCA_CODEL_LIMIT])
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
- q->limit = nla_get_u32(tb[TCA_CODEL_LIMIT]);
-#else
- sch->limit = nla_get_u32(tb[TCA_CODEL_LIMIT]);
-#endif
-
- if (tb[TCA_CODEL_ECN])
- q->params.ecn = !!nla_get_u32(tb[TCA_CODEL_ECN]);
-
- qlen = sch->q.qlen;
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
- while (sch->q.qlen > q->limit) {
-#else
- while (sch->q.qlen > sch->limit) {
-#endif
- struct sk_buff *skb = __skb_dequeue(&sch->q);
-
- sch->qstats.backlog -= qdisc_pkt_len(skb);
- qdisc_drop(skb, sch);
- }
- qdisc_tree_decrease_qlen(sch, qlen - sch->q.qlen);
-
- sch_tree_unlock(sch);
- return 0;
-}
-
-static int codel_init(struct Qdisc *sch, struct nlattr *opt)
-{
- struct codel_sched_data *q = qdisc_priv(sch);
-
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
- q->limit = DEFAULT_CODEL_LIMIT;
-#else
- sch->limit = DEFAULT_CODEL_LIMIT;
-#endif
-
- codel_params_init(&q->params);
- codel_vars_init(&q->vars);
- codel_stats_init(&q->stats);
-
- if (opt) {
- int err = codel_change(sch, opt);
-
- if (err)
- return err;
- }
-
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
- if (q->limit >= 1)
-#else
- if (sch->limit >= 1)
-#endif
- sch->flags |= TCQ_F_CAN_BYPASS;
- else
- sch->flags &= ~TCQ_F_CAN_BYPASS;
-
- return 0;
-}
-
-static int codel_dump(struct Qdisc *sch, struct sk_buff *skb)
-{
- struct codel_sched_data *q = qdisc_priv(sch);
- struct nlattr *opts;
-
- opts = nla_nest_start(skb, TCA_OPTIONS);
- if (opts == NULL)
- goto nla_put_failure;
-
- if (nla_put_u32(skb, TCA_CODEL_TARGET,
- codel_time_to_us(q->params.target)) ||
- nla_put_u32(skb, TCA_CODEL_LIMIT,
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
- q->limit) ||
-#else
- sch->limit) ||
-#endif
- nla_put_u32(skb, TCA_CODEL_INTERVAL,
- codel_time_to_us(q->params.interval)) ||
- nla_put_u32(skb, TCA_CODEL_ECN,
- q->params.ecn))
- goto nla_put_failure;
-
- return nla_nest_end(skb, opts);
-
-nla_put_failure:
- nla_nest_cancel(skb, opts);
- return -1;
-}
-
-static int codel_dump_stats(struct Qdisc *sch, struct gnet_dump *d)
-{
- const struct codel_sched_data *q = qdisc_priv(sch);
- struct tc_codel_xstats st = {
- .maxpacket = q->stats.maxpacket,
- .count = q->vars.count,
- .lastcount = q->vars.lastcount,
- .drop_overlimit = q->drop_overlimit,
- .ldelay = codel_time_to_us(q->vars.ldelay),
- .dropping = q->vars.dropping,
- .ecn_mark = q->stats.ecn_mark,
- };
-
- if (q->vars.dropping) {
- codel_tdiff_t delta = q->vars.drop_next - codel_get_time();
-
- if (delta >= 0)
- st.drop_next = codel_time_to_us(delta);
- else
- st.drop_next = -codel_time_to_us(-delta);
- }
-
- return gnet_stats_copy_app(d, &st, sizeof(st));
-}
-
-static void codel_reset(struct Qdisc *sch)
-{
- struct codel_sched_data *q = qdisc_priv(sch);
-
- qdisc_reset_queue(sch);
- codel_vars_init(&q->vars);
-}
-
-static struct Qdisc_ops codel_qdisc_ops __read_mostly = {
- .id = "codel",
- .priv_size = sizeof(struct codel_sched_data),
-
- .enqueue = codel_qdisc_enqueue,
- .dequeue = codel_qdisc_dequeue,
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,28))
- .peek = qdisc_peek_dequeued,
-#endif
- .init = codel_init,
- .reset = codel_reset,
- .change = codel_change,
- .dump = codel_dump,
- .dump_stats = codel_dump_stats,
- .owner = THIS_MODULE,
-};
-
-static int __init codel_module_init(void)
-{
- return register_qdisc(&codel_qdisc_ops);
-}
-
-static void __exit codel_module_exit(void)
-{
- unregister_qdisc(&codel_qdisc_ops);
-}
-
-module_init(codel_module_init)
-module_exit(codel_module_exit)
-
-MODULE_DESCRIPTION("Controlled Delay queue discipline");
-MODULE_AUTHOR("Dave Taht");
-MODULE_AUTHOR("Eric Dumazet");
-MODULE_LICENSE("Dual BSD/GPL");
--- /dev/null
+--- a/compat/net-sched-sch_codel.c
++++ b/compat/net-sched-sch_codel.c
+@@ -58,6 +58,9 @@ struct codel_sched_data {
+ struct codel_vars vars;
+ struct codel_stats stats;
+ u32 drop_overlimit;
++#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
++ u32 limit;
++#endif
+ };
+
+ /* This is the specific function called from codel_dequeue()
+@@ -95,11 +98,16 @@ static int codel_qdisc_enqueue(struct sk
+ {
+ struct codel_sched_data *q;
+
++ q = qdisc_priv(sch);
++
++#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
++ if (likely(qdisc_qlen(sch) < q->limit)) {
++#else
+ if (likely(qdisc_qlen(sch) < sch->limit)) {
++#endif
+ codel_set_enqueue_time(skb);
+ return qdisc_enqueue_tail(skb, sch);
+ }
+- q = qdisc_priv(sch);
+ q->drop_overlimit++;
+ return qdisc_drop(skb, sch);
+ }
+@@ -140,13 +148,21 @@ static int codel_change(struct Qdisc *sc
+ }
+
+ if (tb[TCA_CODEL_LIMIT])
++#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
++ q->limit = nla_get_u32(tb[TCA_CODEL_LIMIT]);
++#else
+ sch->limit = nla_get_u32(tb[TCA_CODEL_LIMIT]);
++#endif
+
+ if (tb[TCA_CODEL_ECN])
+ q->params.ecn = !!nla_get_u32(tb[TCA_CODEL_ECN]);
+
+ qlen = sch->q.qlen;
++#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
++ while (sch->q.qlen > q->limit) {
++#else
+ while (sch->q.qlen > sch->limit) {
++#endif
+ struct sk_buff *skb = __skb_dequeue(&sch->q);
+
+ sch->qstats.backlog -= qdisc_pkt_len(skb);
+@@ -162,7 +178,11 @@ static int codel_init(struct Qdisc *sch,
+ {
+ struct codel_sched_data *q = qdisc_priv(sch);
+
++#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
++ q->limit = DEFAULT_CODEL_LIMIT;
++#else
+ sch->limit = DEFAULT_CODEL_LIMIT;
++#endif
+
+ codel_params_init(&q->params);
+ codel_vars_init(&q->vars);
+@@ -175,7 +195,11 @@ static int codel_init(struct Qdisc *sch,
+ return err;
+ }
+
++#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
++ if (q->limit >= 1)
++#else
+ if (sch->limit >= 1)
++#endif
+ sch->flags |= TCQ_F_CAN_BYPASS;
+ else
+ sch->flags &= ~TCQ_F_CAN_BYPASS;
+@@ -195,7 +219,11 @@ static int codel_dump(struct Qdisc *sch,
+ if (nla_put_u32(skb, TCA_CODEL_TARGET,
+ codel_time_to_us(q->params.target)) ||
+ nla_put_u32(skb, TCA_CODEL_LIMIT,
++#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,39))
++ q->limit) ||
++#else
+ sch->limit) ||
++#endif
+ nla_put_u32(skb, TCA_CODEL_INTERVAL,
+ codel_time_to_us(q->params.interval)) ||
+ nla_put_u32(skb, TCA_CODEL_ECN,
+@@ -248,7 +276,9 @@ static struct Qdisc_ops codel_qdisc_ops
+
+ .enqueue = codel_qdisc_enqueue,
+ .dequeue = codel_qdisc_dequeue,
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,28))
+ .peek = qdisc_peek_dequeued,
++#endif
+ .init = codel_init,
+ .reset = codel_reset,
+ .change = codel_change,
projects / openwrt / staging / blogic.git / commitdiff