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/*
* lib/route/qdisc/red.c RED Qdisc
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2003-2011 Thomas Graf <tgraf@suug.ch>
*/
/**
* @ingroup qdisc
* @defgroup qdisc_red Random Early Detection (RED)
* @brief
* @{
*/
#include <netlink-local.h>
#include <netlink-tc.h>
#include <netlink/netlink.h>
#include <netlink/utils.h>
#include <netlink/route/tc-api.h>
#include <netlink/route/qdisc.h>
#include <netlink/route/qdisc/red.h>
/** @cond SKIP */
#define RED_ATTR_LIMIT 0x01
#define RED_ATTR_QTH_MIN 0x02
#define RED_ATTR_QTH_MAX 0x04
#define RED_ATTR_FLAGS 0x08
#define RED_ATTR_WLOG 0x10
#define RED_ATTR_PLOG 0x20
#define RED_ATTR_SCELL_LOG 0x40
/** @endcond */
static struct nla_policy red_policy[TCA_RED_MAX+1] = {
[TCA_RED_PARMS] = { .minlen = sizeof(struct tc_red_qopt) },
};
static int red_msg_parser(struct rtnl_tc *tc, void *data)
{
struct nlattr *tb[TCA_RED_MAX+1];
struct rtnl_red *red = data;
struct tc_red_qopt *opts;
int err;
if (!(tc->ce_mask & TCA_ATTR_OPTS))
return 0;
err = tca_parse(tb, TCA_RED_MAX, tc, red_policy);
if (err < 0)
return err;
if (!tb[TCA_RED_PARMS])
return -NLE_MISSING_ATTR;
opts = nla_data(tb[TCA_RED_PARMS]);
red->qr_limit = opts->limit;
red->qr_qth_min = opts->qth_min;
red->qr_qth_max = opts->qth_max;
red->qr_flags = opts->flags;
red->qr_wlog = opts->Wlog;
red->qr_plog = opts->Plog;
red->qr_scell_log = opts->Scell_log;
red->qr_mask = (RED_ATTR_LIMIT | RED_ATTR_QTH_MIN | RED_ATTR_QTH_MAX |
RED_ATTR_FLAGS | RED_ATTR_WLOG | RED_ATTR_PLOG |
RED_ATTR_SCELL_LOG);
return 0;
}
static void red_dump_line(struct rtnl_tc *tc, void *data,
struct nl_dump_params *p)
{
struct rtnl_red *red = data;
if (red) {
/* XXX: limit, min, max, flags */
}
}
static void red_dump_details(struct rtnl_tc *tc, void *data,
struct nl_dump_params *p)
{
struct rtnl_red *red = data;
if (red) {
/* XXX: wlog, plog, scell_log */
}
}
static void red_dump_stats(struct rtnl_tc *tc, void *data,
struct nl_dump_params *p)
{
struct rtnl_red *red = data;
if (red) {
/* XXX: xstats */
}
}
static int red_msg_fill(struct rtnl_tc *tc, void *data, struct nl_msg *msg)
{
struct rtnl_red *red = data;
if (!red)
BUG();
#if 0
memset(&opts, 0, sizeof(opts));
opts.quantum = sfq->qs_quantum;
opts.perturb_period = sfq->qs_perturb;
opts.limit = sfq->qs_limit;
if (nlmsg_append(msg, &opts, sizeof(opts), NL_DONTPAD) < 0)
goto errout;
#endif
return -NLE_OPNOTSUPP;
}
/**
* @name Attribute Access
* @{
*/
/**
* Set limit of RED qdisc.
* @arg qdisc RED qdisc to be modified.
* @arg limit New limit in number of packets.
* @return 0 on success or a negative error code.
*/
void rtnl_red_set_limit(struct rtnl_qdisc *qdisc, int limit)
{
struct rtnl_red *red;
if (!(red = rtnl_tc_data(TC_CAST(qdisc))))
BUG();
red->qr_limit = limit;
red->qr_mask |= RED_ATTR_LIMIT;
}
/**
* Get limit of RED qdisc.
* @arg qdisc RED qdisc.
* @return Limit or a negative error code.
*/
int rtnl_red_get_limit(struct rtnl_qdisc *qdisc)
{
struct rtnl_red *red;
if (!(red = rtnl_tc_data(TC_CAST(qdisc))))
BUG();
if (red->qr_mask & RED_ATTR_LIMIT)
return red->qr_limit;
else
return -NLE_NOATTR;
}
/** @} */
static struct rtnl_tc_ops red_ops = {
.to_kind = "red",
.to_type = RTNL_TC_TYPE_QDISC,
.to_size = sizeof(struct rtnl_red),
.to_msg_parser = red_msg_parser,
.to_dump = {
[NL_DUMP_LINE] = red_dump_line,
[NL_DUMP_DETAILS] = red_dump_details,
[NL_DUMP_STATS] = red_dump_stats,
},
.to_msg_fill = red_msg_fill,
};
static void __init red_init(void)
{
rtnl_tc_register(&red_ops);
}
static void __exit red_exit(void)
{
rtnl_tc_unregister(&red_ops);
}
/** @} */
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