+++ /dev/null
-/*
- * lib/route/sch/htb.c HTB 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) 2003-2006 Thomas Graf <tgraf@suug.ch>
- * Copyright (c) 2005-2006 Petr Gotthard <petr.gotthard@siemens.com>
- * Copyright (c) 2005-2006 Siemens AG Oesterreich
- */
-
-/**
- * @ingroup qdisc
- * @ingroup class
- * @defgroup htb Hierachical Token Bucket (HTB)
- * @{
- */
-
-#include <netlink-local.h>
-#include <netlink-tc.h>
-#include <netlink/netlink.h>
-#include <netlink/cache.h>
-#include <netlink/utils.h>
-#include <netlink/route/tc.h>
-#include <netlink/route/qdisc.h>
-#include <netlink/route/qdisc-modules.h>
-#include <netlink/route/class.h>
-#include <netlink/route/class-modules.h>
-#include <netlink/route/link.h>
-#include <netlink/route/sch/htb.h>
-
-/** @cond SKIP */
-#define SCH_HTB_HAS_RATE2QUANTUM 0x01
-#define SCH_HTB_HAS_DEFCLS 0x02
-
-#define SCH_HTB_HAS_PRIO 0x01
-#define SCH_HTB_HAS_MTU 0x02
-#define SCH_HTB_HAS_RATE 0x04
-#define SCH_HTB_HAS_CEIL 0x08
-#define SCH_HTB_HAS_RBUFFER 0x10
-#define SCH_HTB_HAS_CBUFFER 0x20
-/** @endcond */
-
-static inline struct rtnl_htb_qdisc *htb_qdisc(struct rtnl_qdisc *qdisc)
-{
- if (qdisc->q_subdata == NULL)
- qdisc->q_subdata = calloc(1, sizeof(struct rtnl_htb_qdisc));
-
- return (struct rtnl_htb_qdisc *) qdisc->q_subdata;
-}
-
-static struct nla_policy htb_policy[TCA_HTB_MAX+1] = {
- [TCA_HTB_INIT] = { .minlen = sizeof(struct tc_htb_glob) },
- [TCA_HTB_PARMS] = { .minlen = sizeof(struct tc_htb_opt) },
-};
-
-static int htb_qdisc_msg_parser(struct rtnl_qdisc *qdisc)
-{
- int err;
- struct nlattr *tb[TCA_HTB_MAX + 1];
- struct rtnl_htb_qdisc *d;
-
- err = tca_parse(tb, TCA_HTB_MAX, (struct rtnl_tca *) qdisc, htb_policy);
- if (err < 0)
- return err;
-
- d = htb_qdisc(qdisc);
-
- if (tb[TCA_HTB_INIT]) {
- struct tc_htb_glob opts;
-
- nla_memcpy(&opts, tb[TCA_HTB_INIT], sizeof(opts));
- d->qh_rate2quantum = opts.rate2quantum;
- d->qh_defcls = opts.defcls;
-
- d->qh_mask = (SCH_HTB_HAS_RATE2QUANTUM | SCH_HTB_HAS_DEFCLS);
- }
-
- return 0;
-}
-
-static void htb_qdisc_free_data(struct rtnl_qdisc *qdisc)
-{
- free(qdisc->q_subdata);
-}
-
-static inline struct rtnl_htb_class *htb_class(struct rtnl_class *class)
-{
- if (class->c_subdata == NULL)
- class->c_subdata = calloc(1, sizeof(struct rtnl_htb_class));
-
- return (struct rtnl_htb_class *) class->c_subdata;
-}
-
-static int htb_class_msg_parser(struct rtnl_class *class)
-{
- int err;
- struct nlattr *tb[TCA_HTB_MAX + 1];
- struct rtnl_htb_class *d;
-
- err = tca_parse(tb, TCA_HTB_MAX, (struct rtnl_tca *) class, htb_policy);
- if (err < 0)
- return err;
-
- d = htb_class(class);
-
- if (tb[TCA_HTB_PARMS]) {
- struct tc_htb_opt opts;
-
- nla_memcpy(&opts, tb[TCA_HTB_PARMS], sizeof(opts));
- d->ch_prio = opts.prio;
- rtnl_copy_ratespec(&d->ch_rate, &opts.rate);
- rtnl_copy_ratespec(&d->ch_ceil, &opts.ceil);
- d->ch_rbuffer = opts.buffer;
- d->ch_cbuffer = opts.cbuffer;
-
- d->ch_mask = (SCH_HTB_HAS_PRIO | SCH_HTB_HAS_RATE |
- SCH_HTB_HAS_CEIL | SCH_HTB_HAS_RBUFFER |
- SCH_HTB_HAS_CBUFFER);
- }
-
- return 0;
-}
-
-static void htb_class_free_data(struct rtnl_class *class)
-{
- free(class->c_subdata);
-}
-
-static int htb_qdisc_dump_brief(struct rtnl_qdisc *qdisc,
- struct nl_dump_params *p, int line)
-{
- struct rtnl_htb_qdisc *d = (struct rtnl_htb_qdisc *) qdisc->q_subdata;
-
- if (d == NULL)
- goto ignore;
-
- if (d->qh_mask & SCH_HTB_HAS_RATE2QUANTUM)
- dp_dump(p, " r2q %u", d->qh_rate2quantum);
-
- if (d->qh_mask & SCH_HTB_HAS_DEFCLS) {
- char buf[32];
- dp_dump(p, " default %s",
- rtnl_tc_handle2str(d->qh_defcls, buf, sizeof(buf)));
- }
-
-ignore:
- return line;
-}
-
-static int htb_class_dump_brief(struct rtnl_class *class,
- struct nl_dump_params *p, int line)
-{
- struct rtnl_htb_class *d = (struct rtnl_htb_class *) class->c_subdata;
-
- if (d == NULL)
- goto ignore;
-
- if (d->ch_mask & SCH_HTB_HAS_RATE) {
- double r, rbit;
- char *ru, *rubit;
-
- r = nl_cancel_down_bytes(d->ch_rate.rs_rate, &ru);
- rbit = nl_cancel_down_bits(d->ch_rate.rs_rate*8, &rubit);
-
- dp_dump(p, " rate %.2f%s/s (%.0f%s) log %u",
- r, ru, rbit, rubit, 1<<d->ch_rate.rs_cell_log);
- }
-
-ignore:
- return line;
-}
-
-static int htb_class_dump_full(struct rtnl_class *class,
- struct nl_dump_params *p, int line)
-{
- struct rtnl_htb_class *d = (struct rtnl_htb_class *) class->c_subdata;
-
- if (d == NULL)
- goto ignore;
-
- /* line 1 */
- if (d->ch_mask & SCH_HTB_HAS_CEIL) {
- double r, rbit;
- char *ru, *rubit;
-
- r = nl_cancel_down_bytes(d->ch_ceil.rs_rate, &ru);
- rbit = nl_cancel_down_bits(d->ch_ceil.rs_rate*8, &rubit);
-
- dp_dump(p, " ceil %.2f%s/s (%.0f%s) log %u",
- r, ru, rbit, rubit, 1<<d->ch_ceil.rs_cell_log);
- }
-
- if (d->ch_mask & SCH_HTB_HAS_PRIO)
- dp_dump(p, " prio %u", d->ch_prio);
- if (d->ch_mask & SCH_HTB_HAS_RBUFFER)
- dp_dump(p, " rbuffer %u", d->ch_rbuffer);
- if (d->ch_mask & SCH_HTB_HAS_CBUFFER)
- dp_dump(p, " cbuffer %u", d->ch_cbuffer);
-
-ignore:
- return line;
-}
-
-static struct nl_msg *htb_qdisc_get_opts(struct rtnl_qdisc *qdisc)
-{
- struct rtnl_htb_qdisc *d = (struct rtnl_htb_qdisc *) qdisc->q_subdata;
- struct tc_htb_glob opts;
- struct nl_msg *msg;
-
- if (d == NULL)
- return NULL;
-
- msg = nlmsg_build(NULL);
- if (msg == NULL)
- return NULL;
-
- memset(&opts, 0, sizeof(opts));
- opts.version = TC_HTB_PROTOVER;
-
- if (d->qh_mask & SCH_HTB_HAS_RATE2QUANTUM)
- opts.rate2quantum = d->qh_rate2quantum;
- if (d->qh_mask & SCH_HTB_HAS_DEFCLS)
- opts.defcls = d->qh_defcls;
-
- nla_put(msg, TCA_HTB_INIT, sizeof(opts), &opts);
-
- return msg;
-}
-
-static inline uint32_t compute_burst(uint32_t rate, uint32_t mtu)
-{
- return rtnl_tc_calc_txtime(rate / nl_get_hz() + mtu, rate);
-}
-
-static uint8_t compute_cell(uint32_t rate, uint32_t mtu)
-{
- uint8_t cell_log = 0;
- while (mtu > 255) {
- mtu >>= 1;
- cell_log++;
- }
-
- return cell_log;
-}
-
-static struct nl_msg *htb_class_get_opts(struct rtnl_class *class)
-{
- struct rtnl_htb_class *d = (struct rtnl_htb_class *) class->c_subdata;
- uint32_t rtable[256], ctable[256];
- struct tc_htb_opt opts;
- struct nl_msg *msg;
-
-
- if (d == NULL)
- return NULL;
-
- msg = nlmsg_build(NULL);
- memset(&opts, 0, sizeof(opts));
-
- /* if not set, zero (0) is used as priority */
- if (d->ch_mask & SCH_HTB_HAS_PRIO)
- opts.prio = d->ch_prio;
-
- if (!(d->ch_mask & SCH_HTB_HAS_RATE))
- BUG();
-
- rtnl_rcopy_ratespec(&opts.rate, &d->ch_rate);
- /* if cell_log not set, compute default value */
- if (opts.rate.cell_log == UINT8_MAX)
- {
- if(!(d->ch_mask & SCH_HTB_HAS_MTU))
- BUG();
- opts.rate.cell_log = compute_cell(opts.rate.rate, d->ch_mtu);
- }
-
- /* if not set, configured rate is used as ceil, which implies no borrowing */
- if (d->ch_mask & SCH_HTB_HAS_CEIL)
- rtnl_rcopy_ratespec(&opts.ceil, &d->ch_ceil);
- else
- memcpy(&opts.ceil, &opts.rate, sizeof(struct tc_ratespec));
- /* if cell_log not set, compute default value */
- if (opts.ceil.cell_log == UINT8_MAX)
- {
- if(!(d->ch_mask & SCH_HTB_HAS_MTU))
- BUG();
- opts.ceil.cell_log = compute_cell(opts.ceil.rate, d->ch_mtu);
- }
-
- if (d->ch_mask & SCH_HTB_HAS_RBUFFER)
- opts.buffer = d->ch_rbuffer;
- else
- {
- if(!(d->ch_mask & SCH_HTB_HAS_MTU))
- BUG();
- opts.buffer = compute_burst(opts.rate.rate, d->ch_mtu);
- }
-
- if (d->ch_mask & SCH_HTB_HAS_CBUFFER)
- opts.cbuffer = d->ch_cbuffer;
- else
- {
- if(!(d->ch_mask & SCH_HTB_HAS_MTU))
- BUG();
- opts.cbuffer = compute_burst(opts.ceil.rate, d->ch_mtu);
- }
-
- nla_put(msg, TCA_HTB_PARMS, sizeof(opts), &opts);
- rtnl_tc_build_rate_table(rtable, opts.rate.mpu & 0xff,
- opts.rate.mpu >> 8, 1 << opts.rate.cell_log,
- opts.rate.rate);
- nla_put(msg, TCA_HTB_RTAB, sizeof(rtable), &rtable);
- rtnl_tc_build_rate_table(ctable, opts.ceil.mpu & 0xff,
- opts.ceil.mpu >> 8, 1 << opts.ceil.cell_log,
- opts.ceil.rate);
- nla_put(msg, TCA_HTB_CTAB, sizeof(ctable), &ctable);
-
- return msg;
-}
-
-/**
- * @name Attribute Modifications
- * @{
- */
-
-void rtnl_htb_set_rate2quantum(struct rtnl_qdisc *qdisc, uint32_t rate2quantum)
-{
- struct rtnl_htb_qdisc *d = htb_qdisc(qdisc);
- if (d == NULL)
- return;
-
- d->qh_rate2quantum = rate2quantum;
- d->qh_mask |= SCH_HTB_HAS_RATE2QUANTUM;
-}
-
-/**
- * Set default class of the htb qdisc to the specified value
- * @arg qdisc qdisc to change
- * @arg defcls new default class
- */
-void rtnl_htb_set_defcls(struct rtnl_qdisc *qdisc, uint32_t defcls)
-{
- struct rtnl_htb_qdisc *d = htb_qdisc(qdisc);
- if (d == NULL)
- return;
-
- d->qh_defcls = defcls;
- d->qh_mask |= SCH_HTB_HAS_DEFCLS;
-}
-
-void rtnl_htb_set_prio(struct rtnl_class *class, uint32_t prio)
-{
- struct rtnl_htb_class *d = htb_class(class);
- if (d == NULL)
- return;
-
- d->ch_prio = prio;
- d->ch_mask |= SCH_HTB_HAS_PRIO;
-}
-
-void rtnl_htb_set_mtu(struct rtnl_class *class, uint32_t mtu)
-{
- struct rtnl_htb_class *d = htb_class(class);
- if (d == NULL)
- return;
-
- d->ch_mtu = mtu;
- d->ch_mask |= SCH_HTB_HAS_MTU;
-}
-
-void rtnl_htb_set_rate(struct rtnl_class *class, uint32_t rate)
-{
- struct rtnl_htb_class *d = htb_class(class);
- if (d == NULL)
- return;
-
- d->ch_rate.rs_cell_log = UINT8_MAX; /* use default value */
- d->ch_rate.rs_rate = rate;
- d->ch_mask |= SCH_HTB_HAS_RATE;
-}
-
-void rtnl_htb_set_ceil(struct rtnl_class *class, uint32_t ceil)
-{
- struct rtnl_htb_class *d = htb_class(class);
- if (d == NULL)
- return;
-
- d->ch_ceil.rs_cell_log = UINT8_MAX; /* use default value */
- d->ch_ceil.rs_rate = ceil;
- d->ch_mask |= SCH_HTB_HAS_CEIL;
-}
-
-/** @} */
-
-static struct rtnl_qdisc_ops htb_qdisc_ops = {
- .qo_kind = "htb",
- .qo_msg_parser = htb_qdisc_msg_parser,
- .qo_free_data = htb_qdisc_free_data,
- .qo_dump[NL_DUMP_BRIEF] = htb_qdisc_dump_brief,
- .qo_get_opts = htb_qdisc_get_opts,
-};
-
-static struct rtnl_class_ops htb_class_ops = {
- .co_kind = "htb",
- .co_msg_parser = htb_class_msg_parser,
- .co_free_data = htb_class_free_data,
- .co_dump[NL_DUMP_BRIEF] = htb_class_dump_brief,
- .co_dump[NL_DUMP_FULL] = htb_class_dump_full,
- .co_get_opts = htb_class_get_opts,
-};
-
-static void __init htb_init(void)
-{
- rtnl_qdisc_register(&htb_qdisc_ops);
- rtnl_class_register(&htb_class_ops);
-}
-
-static void __exit htb_exit(void)
-{
- rtnl_qdisc_unregister(&htb_qdisc_ops);
- rtnl_class_unregister(&htb_class_ops);
-}
-
-/** @} */
git://git.onelab.eu / libnl.git / blobdiff