--- /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