hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
linux-sg2042/net/sched/sch_ets.c

829 lines
20 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* net/sched/sch_ets.c Enhanced Transmission Selection scheduler
*
* Description
* -----------
*
* The Enhanced Transmission Selection scheduler is a classful queuing
* discipline that merges functionality of PRIO and DRR qdiscs in one scheduler.
* ETS makes it easy to configure a set of strict and bandwidth-sharing bands to
* implement the transmission selection described in 802.1Qaz.
*
* Although ETS is technically classful, it's not possible to add and remove
* classes at will. Instead one specifies number of classes, how many are
* PRIO-like and how many DRR-like, and quanta for the latter.
*
* Algorithm
* ---------
*
* The strict classes, if any, are tried for traffic first: first band 0, if it
* has no traffic then band 1, etc.
*
* When there is no traffic in any of the strict queues, the bandwidth-sharing
* ones are tried next. Each band is assigned a deficit counter, initialized to
* "quantum" of that band. ETS maintains a list of active bandwidth-sharing
* bands whose qdiscs are non-empty. A packet is dequeued from the band at the
* head of the list if the packet size is smaller or equal to the deficit
* counter. If the counter is too small, it is increased by "quantum" and the
* scheduler moves on to the next band in the active list.
*/
#include <linux/module.h>
#include <net/gen_stats.h>
#include <net/netlink.h>
#include <net/pkt_cls.h>
#include <net/pkt_sched.h>
#include <net/sch_generic.h>
struct ets_class {
struct list_head alist; /* In struct ets_sched.active. */
struct Qdisc *qdisc;
u32 quantum;
u32 deficit;
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
};
struct ets_sched {
struct list_head active;
struct tcf_proto __rcu *filter_list;
struct tcf_block *block;
unsigned int nbands;
unsigned int nstrict;
u8 prio2band[TC_PRIO_MAX + 1];
struct ets_class classes[TCQ_ETS_MAX_BANDS];
};
static const struct nla_policy ets_policy[TCA_ETS_MAX + 1] = {
[TCA_ETS_NBANDS] = { .type = NLA_U8 },
[TCA_ETS_NSTRICT] = { .type = NLA_U8 },
[TCA_ETS_QUANTA] = { .type = NLA_NESTED },
[TCA_ETS_PRIOMAP] = { .type = NLA_NESTED },
};
static const struct nla_policy ets_priomap_policy[TCA_ETS_MAX + 1] = {
[TCA_ETS_PRIOMAP_BAND] = { .type = NLA_U8 },
};
static const struct nla_policy ets_quanta_policy[TCA_ETS_MAX + 1] = {
[TCA_ETS_QUANTA_BAND] = { .type = NLA_U32 },
};
static const struct nla_policy ets_class_policy[TCA_ETS_MAX + 1] = {
[TCA_ETS_QUANTA_BAND] = { .type = NLA_U32 },
};
static int ets_quantum_parse(struct Qdisc *sch, const struct nlattr *attr,
unsigned int *quantum,
struct netlink_ext_ack *extack)
{
*quantum = nla_get_u32(attr);
if (!*quantum) {
NL_SET_ERR_MSG(extack, "ETS quantum cannot be zero");
return -EINVAL;
}
return 0;
}
static struct ets_class *
ets_class_from_arg(struct Qdisc *sch, unsigned long arg)
{
struct ets_sched *q = qdisc_priv(sch);
return &q->classes[arg - 1];
}
static u32 ets_class_id(struct Qdisc *sch, const struct ets_class *cl)
{
struct ets_sched *q = qdisc_priv(sch);
int band = cl - q->classes;
return TC_H_MAKE(sch->handle, band + 1);
}
static void ets_offload_change(struct Qdisc *sch)
{
struct net_device *dev = qdisc_dev(sch);
struct ets_sched *q = qdisc_priv(sch);
struct tc_ets_qopt_offload qopt;
unsigned int w_psum_prev = 0;
unsigned int q_psum = 0;
unsigned int q_sum = 0;
unsigned int quantum;
unsigned int w_psum;
unsigned int weight;
unsigned int i;
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
return;
qopt.command = TC_ETS_REPLACE;
qopt.handle = sch->handle;
qopt.parent = sch->parent;
qopt.replace_params.bands = q->nbands;
qopt.replace_params.qstats = &sch->qstats;
memcpy(&qopt.replace_params.priomap,
q->prio2band, sizeof(q->prio2band));
for (i = 0; i < q->nbands; i++)
q_sum += q->classes[i].quantum;
for (i = 0; i < q->nbands; i++) {
quantum = q->classes[i].quantum;
q_psum += quantum;
w_psum = quantum ? q_psum * 100 / q_sum : 0;
weight = w_psum - w_psum_prev;
w_psum_prev = w_psum;
qopt.replace_params.quanta[i] = quantum;
qopt.replace_params.weights[i] = weight;
}
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_ETS, &qopt);
}
static void ets_offload_destroy(struct Qdisc *sch)
{
struct net_device *dev = qdisc_dev(sch);
struct tc_ets_qopt_offload qopt;
if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
return;
qopt.command = TC_ETS_DESTROY;
qopt.handle = sch->handle;
qopt.parent = sch->parent;
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_ETS, &qopt);
}
static void ets_offload_graft(struct Qdisc *sch, struct Qdisc *new,
struct Qdisc *old, unsigned long arg,
struct netlink_ext_ack *extack)
{
struct net_device *dev = qdisc_dev(sch);
struct tc_ets_qopt_offload qopt;
qopt.command = TC_ETS_GRAFT;
qopt.handle = sch->handle;
qopt.parent = sch->parent;
qopt.graft_params.band = arg - 1;
qopt.graft_params.child_handle = new->handle;
qdisc_offload_graft_helper(dev, sch, new, old, TC_SETUP_QDISC_ETS,
&qopt, extack);
}
static int ets_offload_dump(struct Qdisc *sch)
{
struct tc_ets_qopt_offload qopt;
qopt.command = TC_ETS_STATS;
qopt.handle = sch->handle;
qopt.parent = sch->parent;
qopt.stats.bstats = &sch->bstats;
qopt.stats.qstats = &sch->qstats;
return qdisc_offload_dump_helper(sch, TC_SETUP_QDISC_ETS, &qopt);
}
static bool ets_class_is_strict(struct ets_sched *q, const struct ets_class *cl)
{
unsigned int band = cl - q->classes;
return band < q->nstrict;
}
static int ets_class_change(struct Qdisc *sch, u32 classid, u32 parentid,
struct nlattr **tca, unsigned long *arg,
struct netlink_ext_ack *extack)
{
struct ets_class *cl = ets_class_from_arg(sch, *arg);
struct ets_sched *q = qdisc_priv(sch);
struct nlattr *opt = tca[TCA_OPTIONS];
struct nlattr *tb[TCA_ETS_MAX + 1];
unsigned int quantum;
int err;
/* Classes can be added and removed only through Qdisc_ops.change
* interface.
*/
if (!cl) {
NL_SET_ERR_MSG(extack, "Fine-grained class addition and removal is not supported");
return -EOPNOTSUPP;
}
if (!opt) {
NL_SET_ERR_MSG(extack, "ETS options are required for this operation");
return -EINVAL;
}
err = nla_parse_nested(tb, TCA_ETS_MAX, opt, ets_class_policy, extack);
if (err < 0)
return err;
if (!tb[TCA_ETS_QUANTA_BAND])
/* Nothing to configure. */
return 0;
if (ets_class_is_strict(q, cl)) {
NL_SET_ERR_MSG(extack, "Strict bands do not have a configurable quantum");
return -EINVAL;
}
err = ets_quantum_parse(sch, tb[TCA_ETS_QUANTA_BAND], &quantum,
extack);
if (err)
return err;
sch_tree_lock(sch);
cl->quantum = quantum;
sch_tree_unlock(sch);
ets_offload_change(sch);
return 0;
}
static int ets_class_graft(struct Qdisc *sch, unsigned long arg,
struct Qdisc *new, struct Qdisc **old,
struct netlink_ext_ack *extack)
{
struct ets_class *cl = ets_class_from_arg(sch, arg);
if (!new) {
new = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops,
ets_class_id(sch, cl), NULL);
if (!new)
new = &noop_qdisc;
else
qdisc_hash_add(new, true);
}
*old = qdisc_replace(sch, new, &cl->qdisc);
ets_offload_graft(sch, new, *old, arg, extack);
return 0;
}
static struct Qdisc *ets_class_leaf(struct Qdisc *sch, unsigned long arg)
{
struct ets_class *cl = ets_class_from_arg(sch, arg);
return cl->qdisc;
}
static unsigned long ets_class_find(struct Qdisc *sch, u32 classid)
{
unsigned long band = TC_H_MIN(classid);
struct ets_sched *q = qdisc_priv(sch);
if (band - 1 >= q->nbands)
return 0;
return band;
}
static void ets_class_qlen_notify(struct Qdisc *sch, unsigned long arg)
{
struct ets_class *cl = ets_class_from_arg(sch, arg);
struct ets_sched *q = qdisc_priv(sch);
/* We get notified about zero-length child Qdiscs as well if they are
* offloaded. Those aren't on the active list though, so don't attempt
* to remove them.
*/
if (!ets_class_is_strict(q, cl) && sch->q.qlen)
list_del(&cl->alist);
}
static int ets_class_dump(struct Qdisc *sch, unsigned long arg,
struct sk_buff *skb, struct tcmsg *tcm)
{
struct ets_class *cl = ets_class_from_arg(sch, arg);
struct ets_sched *q = qdisc_priv(sch);
struct nlattr *nest;
tcm->tcm_parent = TC_H_ROOT;
tcm->tcm_handle = ets_class_id(sch, cl);
tcm->tcm_info = cl->qdisc->handle;
nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
if (!nest)
goto nla_put_failure;
if (!ets_class_is_strict(q, cl)) {
if (nla_put_u32(skb, TCA_ETS_QUANTA_BAND, cl->quantum))
goto nla_put_failure;
}
return nla_nest_end(skb, nest);
nla_put_failure:
nla_nest_cancel(skb, nest);
return -EMSGSIZE;
}
static int ets_class_dump_stats(struct Qdisc *sch, unsigned long arg,
struct gnet_dump *d)
{
struct ets_class *cl = ets_class_from_arg(sch, arg);
struct Qdisc *cl_q = cl->qdisc;
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
d, NULL, &cl_q->bstats) < 0 ||
qdisc_qstats_copy(d, cl_q) < 0)
return -1;
return 0;
}
static void ets_qdisc_walk(struct Qdisc *sch, struct qdisc_walker *arg)
{
struct ets_sched *q = qdisc_priv(sch);
int i;
if (arg->stop)
return;
for (i = 0; i < q->nbands; i++) {
if (arg->count < arg->skip) {
arg->count++;
continue;
}
if (arg->fn(sch, i + 1, arg) < 0) {
arg->stop = 1;
break;
}
arg->count++;
}
}
static struct tcf_block *
ets_qdisc_tcf_block(struct Qdisc *sch, unsigned long cl,
struct netlink_ext_ack *extack)
{
struct ets_sched *q = qdisc_priv(sch);
if (cl) {
NL_SET_ERR_MSG(extack, "ETS classid must be zero");
return NULL;
}
return q->block;
}
static unsigned long ets_qdisc_bind_tcf(struct Qdisc *sch, unsigned long parent,
u32 classid)
{
return ets_class_find(sch, classid);
}
static void ets_qdisc_unbind_tcf(struct Qdisc *sch, unsigned long arg)
{
}
static struct ets_class *ets_classify(struct sk_buff *skb, struct Qdisc *sch,
int *qerr)
{
struct ets_sched *q = qdisc_priv(sch);
u32 band = skb->priority;
struct tcf_result res;
struct tcf_proto *fl;
int err;
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
if (TC_H_MAJ(skb->priority) != sch->handle) {
fl = rcu_dereference_bh(q->filter_list);
err = tcf_classify(skb, fl, &res, false);
#ifdef CONFIG_NET_CLS_ACT
switch (err) {
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
fallthrough;
case TC_ACT_SHOT:
return NULL;
}
#endif
if (!fl || err < 0) {
if (TC_H_MAJ(band))
band = 0;
return &q->classes[q->prio2band[band & TC_PRIO_MAX]];
}
band = res.classid;
}
band = TC_H_MIN(band) - 1;
if (band >= q->nbands)
return &q->classes[q->prio2band[0]];
return &q->classes[band];
}
static int ets_qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
struct sk_buff **to_free)
{
unsigned int len = qdisc_pkt_len(skb);
struct ets_sched *q = qdisc_priv(sch);
struct ets_class *cl;
int err = 0;
bool first;
cl = ets_classify(skb, sch, &err);
if (!cl) {
if (err & __NET_XMIT_BYPASS)
qdisc_qstats_drop(sch);
__qdisc_drop(skb, to_free);
return err;
}
first = !cl->qdisc->q.qlen;
err = qdisc_enqueue(skb, cl->qdisc, to_free);
if (unlikely(err != NET_XMIT_SUCCESS)) {
if (net_xmit_drop_count(err)) {
cl->qstats.drops++;
qdisc_qstats_drop(sch);
}
return err;
}
if (first && !ets_class_is_strict(q, cl)) {
list_add_tail(&cl->alist, &q->active);
cl->deficit = cl->quantum;
}
sch->qstats.backlog += len;
sch->q.qlen++;
return err;
}
static struct sk_buff *
ets_qdisc_dequeue_skb(struct Qdisc *sch, struct sk_buff *skb)
{
qdisc_bstats_update(sch, skb);
qdisc_qstats_backlog_dec(sch, skb);
sch->q.qlen--;
return skb;
}
static struct sk_buff *ets_qdisc_dequeue(struct Qdisc *sch)
{
struct ets_sched *q = qdisc_priv(sch);
struct ets_class *cl;
struct sk_buff *skb;
unsigned int band;
unsigned int len;
while (1) {
for (band = 0; band < q->nstrict; band++) {
cl = &q->classes[band];
skb = qdisc_dequeue_peeked(cl->qdisc);
if (skb)
return ets_qdisc_dequeue_skb(sch, skb);
}
if (list_empty(&q->active))
goto out;
cl = list_first_entry(&q->active, struct ets_class, alist);
skb = cl->qdisc->ops->peek(cl->qdisc);
if (!skb) {
qdisc_warn_nonwc(__func__, cl->qdisc);
goto out;
}
len = qdisc_pkt_len(skb);
if (len <= cl->deficit) {
cl->deficit -= len;
skb = qdisc_dequeue_peeked(cl->qdisc);
if (unlikely(!skb))
goto out;
if (cl->qdisc->q.qlen == 0)
list_del(&cl->alist);
return ets_qdisc_dequeue_skb(sch, skb);
}
cl->deficit += cl->quantum;
list_move_tail(&cl->alist, &q->active);
}
out:
return NULL;
}
static int ets_qdisc_priomap_parse(struct nlattr *priomap_attr,
unsigned int nbands, u8 *priomap,
struct netlink_ext_ack *extack)
{
const struct nlattr *attr;
int prio = 0;
u8 band;
int rem;
int err;
err = __nla_validate_nested(priomap_attr, TCA_ETS_MAX,
ets_priomap_policy, NL_VALIDATE_STRICT,
extack);
if (err)
return err;
nla_for_each_nested(attr, priomap_attr, rem) {
switch (nla_type(attr)) {
case TCA_ETS_PRIOMAP_BAND:
if (prio > TC_PRIO_MAX) {
NL_SET_ERR_MSG_MOD(extack, "Too many priorities in ETS priomap");
return -EINVAL;
}
band = nla_get_u8(attr);
if (band >= nbands) {
NL_SET_ERR_MSG_MOD(extack, "Invalid band number in ETS priomap");
return -EINVAL;
}
priomap[prio++] = band;
break;
default:
WARN_ON_ONCE(1); /* Validate should have caught this. */
return -EINVAL;
}
}
return 0;
}
static int ets_qdisc_quanta_parse(struct Qdisc *sch, struct nlattr *quanta_attr,
unsigned int nbands, unsigned int nstrict,
unsigned int *quanta,
struct netlink_ext_ack *extack)
{
const struct nlattr *attr;
int band = nstrict;
int rem;
int err;
err = __nla_validate_nested(quanta_attr, TCA_ETS_MAX,
ets_quanta_policy, NL_VALIDATE_STRICT,
extack);
if (err < 0)
return err;
nla_for_each_nested(attr, quanta_attr, rem) {
switch (nla_type(attr)) {
case TCA_ETS_QUANTA_BAND:
if (band >= nbands) {
NL_SET_ERR_MSG_MOD(extack, "ETS quanta has more values than bands");
return -EINVAL;
}
err = ets_quantum_parse(sch, attr, &quanta[band++],
extack);
if (err)
return err;
break;
default:
WARN_ON_ONCE(1); /* Validate should have caught this. */
return -EINVAL;
}
}
return 0;
}
static int ets_qdisc_change(struct Qdisc *sch, struct nlattr *opt,
struct netlink_ext_ack *extack)
{
unsigned int quanta[TCQ_ETS_MAX_BANDS] = {0};
struct Qdisc *queues[TCQ_ETS_MAX_BANDS];
struct ets_sched *q = qdisc_priv(sch);
struct nlattr *tb[TCA_ETS_MAX + 1];
unsigned int oldbands = q->nbands;
u8 priomap[TC_PRIO_MAX + 1];
unsigned int nstrict = 0;
unsigned int nbands;
unsigned int i;
int err;
if (!opt) {
NL_SET_ERR_MSG(extack, "ETS options are required for this operation");
return -EINVAL;
}
err = nla_parse_nested(tb, TCA_ETS_MAX, opt, ets_policy, extack);
if (err < 0)
return err;
if (!tb[TCA_ETS_NBANDS]) {
NL_SET_ERR_MSG_MOD(extack, "Number of bands is a required argument");
return -EINVAL;
}
nbands = nla_get_u8(tb[TCA_ETS_NBANDS]);
if (nbands < 1 || nbands > TCQ_ETS_MAX_BANDS) {
NL_SET_ERR_MSG_MOD(extack, "Invalid number of bands");
return -EINVAL;
}
/* Unless overridden, traffic goes to the last band. */
memset(priomap, nbands - 1, sizeof(priomap));
if (tb[TCA_ETS_NSTRICT]) {
nstrict = nla_get_u8(tb[TCA_ETS_NSTRICT]);
if (nstrict > nbands) {
NL_SET_ERR_MSG_MOD(extack, "Invalid number of strict bands");
return -EINVAL;
}
}
if (tb[TCA_ETS_PRIOMAP]) {
err = ets_qdisc_priomap_parse(tb[TCA_ETS_PRIOMAP],
nbands, priomap, extack);
if (err)
return err;
}
if (tb[TCA_ETS_QUANTA]) {
err = ets_qdisc_quanta_parse(sch, tb[TCA_ETS_QUANTA],
nbands, nstrict, quanta, extack);
if (err)
return err;
}
/* If there are more bands than strict + quanta provided, the remaining
* ones are ETS with quantum of MTU. Initialize the missing values here.
*/
for (i = nstrict; i < nbands; i++) {
if (!quanta[i])
quanta[i] = psched_mtu(qdisc_dev(sch));
}
/* Before commit, make sure we can allocate all new qdiscs */
for (i = oldbands; i < nbands; i++) {
queues[i] = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops,
ets_class_id(sch, &q->classes[i]),
extack);
if (!queues[i]) {
while (i > oldbands)
qdisc_put(queues[--i]);
return -ENOMEM;
}
}
sch_tree_lock(sch);
q->nbands = nbands;
q->nstrict = nstrict;
memcpy(q->prio2band, priomap, sizeof(priomap));
for (i = q->nbands; i < oldbands; i++)
qdisc_tree_flush_backlog(q->classes[i].qdisc);
for (i = 0; i < q->nbands; i++)
q->classes[i].quantum = quanta[i];
for (i = oldbands; i < q->nbands; i++) {
q->classes[i].qdisc = queues[i];
if (q->classes[i].qdisc != &noop_qdisc)
qdisc_hash_add(q->classes[i].qdisc, true);
}
sch_tree_unlock(sch);
ets_offload_change(sch);
for (i = q->nbands; i < oldbands; i++) {
qdisc_put(q->classes[i].qdisc);
memset(&q->classes[i], 0, sizeof(q->classes[i]));
}
return 0;
}
static int ets_qdisc_init(struct Qdisc *sch, struct nlattr *opt,
struct netlink_ext_ack *extack)
{
struct ets_sched *q = qdisc_priv(sch);
int err;
if (!opt)
return -EINVAL;
err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
INIT_LIST_HEAD(&q->active);
return ets_qdisc_change(sch, opt, extack);
}
static void ets_qdisc_reset(struct Qdisc *sch)
{
struct ets_sched *q = qdisc_priv(sch);
int band;
for (band = q->nstrict; band < q->nbands; band++) {
if (q->classes[band].qdisc->q.qlen)
list_del(&q->classes[band].alist);
}
for (band = 0; band < q->nbands; band++)
qdisc_reset(q->classes[band].qdisc);
sch->qstats.backlog = 0;
sch->q.qlen = 0;
}
static void ets_qdisc_destroy(struct Qdisc *sch)
{
struct ets_sched *q = qdisc_priv(sch);
int band;
ets_offload_destroy(sch);
tcf_block_put(q->block);
for (band = 0; band < q->nbands; band++)
qdisc_put(q->classes[band].qdisc);
}
static int ets_qdisc_dump(struct Qdisc *sch, struct sk_buff *skb)
{
struct ets_sched *q = qdisc_priv(sch);
struct nlattr *opts;
struct nlattr *nest;
int band;
int prio;
int err;
err = ets_offload_dump(sch);
if (err)
return err;
opts = nla_nest_start_noflag(skb, TCA_OPTIONS);
if (!opts)
goto nla_err;
if (nla_put_u8(skb, TCA_ETS_NBANDS, q->nbands))
goto nla_err;
if (q->nstrict &&
nla_put_u8(skb, TCA_ETS_NSTRICT, q->nstrict))
goto nla_err;
if (q->nbands > q->nstrict) {
nest = nla_nest_start(skb, TCA_ETS_QUANTA);
if (!nest)
goto nla_err;
for (band = q->nstrict; band < q->nbands; band++) {
if (nla_put_u32(skb, TCA_ETS_QUANTA_BAND,
q->classes[band].quantum))
goto nla_err;
}
nla_nest_end(skb, nest);
}
nest = nla_nest_start(skb, TCA_ETS_PRIOMAP);
if (!nest)
goto nla_err;
for (prio = 0; prio <= TC_PRIO_MAX; prio++) {
if (nla_put_u8(skb, TCA_ETS_PRIOMAP_BAND, q->prio2band[prio]))
goto nla_err;
}
nla_nest_end(skb, nest);
return nla_nest_end(skb, opts);
nla_err:
nla_nest_cancel(skb, opts);
return -EMSGSIZE;
}
static const struct Qdisc_class_ops ets_class_ops = {
.change = ets_class_change,
.graft = ets_class_graft,
.leaf = ets_class_leaf,
.find = ets_class_find,
.qlen_notify = ets_class_qlen_notify,
.dump = ets_class_dump,
.dump_stats = ets_class_dump_stats,
.walk = ets_qdisc_walk,
.tcf_block = ets_qdisc_tcf_block,
.bind_tcf = ets_qdisc_bind_tcf,
.unbind_tcf = ets_qdisc_unbind_tcf,
};
static struct Qdisc_ops ets_qdisc_ops __read_mostly = {
.cl_ops = &ets_class_ops,
.id = "ets",
.priv_size = sizeof(struct ets_sched),
.enqueue = ets_qdisc_enqueue,
.dequeue = ets_qdisc_dequeue,
.peek = qdisc_peek_dequeued,
.change = ets_qdisc_change,
.init = ets_qdisc_init,
.reset = ets_qdisc_reset,
.destroy = ets_qdisc_destroy,
.dump = ets_qdisc_dump,
.owner = THIS_MODULE,
};
static int __init ets_init(void)
{
return register_qdisc(&ets_qdisc_ops);
}
static void __exit ets_exit(void)
{
unregister_qdisc(&ets_qdisc_ops);
}
module_init(ets_init);
module_exit(ets_exit);
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink