</variablelist>
</refsect1>
+ <refsect1>
+ <title>[PIE] Section Options</title>
+ <para>The <literal>[PIE]</literal> section manages the queueing discipline
+ (qdisc) of Proportional Integral controller-Enhanced (PIE).</para>
+
+ <variablelist class='network-directives'>
+ <varlistentry>
+ <term><varname>Parent=</varname></term>
+ <listitem>
+ <para>Specifies the parent Queueing Discipline (qdisc). Takes one of <literal>root</literal>,
+ <literal>clsact</literal> or <literal>ingress</literal>. Defaults to <literal>root</literal>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>Handle=</varname></term>
+ <listitem>
+ <para>Specifies the major number of unique identifier of the qdisc, known as the handle.
+ Takes a number in hexadecimal ranges 1 to ffff. Defaults to unset.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>PacketLimit=</varname></term>
+ <listitem>
+ <para>Specifies the hard limit on the queue size in number of packets. When this limit is reached, incoming packets are
+ dropped. An unsigned integer ranges 1 to 4294967294. Defaults to unset and kernel's default is used.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
<refsect1>
<title>[StochasticFairBlue] Section Options</title>
<para>The <literal>[StochasticFairBlue]</literal> section manages the queueing discipline
tc/htb.h
tc/netem.c
tc/netem.h
+ tc/pie.c
+ tc/pie.h
tc/qdisc.c
tc/qdisc.h
tc/sfb.c
NetworkEmulator.LossRate, config_parse_network_emulator_rate, QDISC_KIND_NETEM, 0
NetworkEmulator.DuplicateRate, config_parse_network_emulator_rate, QDISC_KIND_NETEM, 0
NetworkEmulator.PacketLimit, config_parse_network_emulator_packet_limit, QDISC_KIND_NETEM, 0
+PIE.Parent, config_parse_qdisc_parent, QDISC_KIND_PIE, 0
+PIE.Handle, config_parse_qdisc_handle, QDISC_KIND_PIE, 0
+PIE.PacketLimit, config_parse_pie_packet_limit, QDISC_KIND_PIE, 0
StochasticFairBlue.Parent, config_parse_qdisc_parent, QDISC_KIND_SFB, 0
StochasticFairBlue.Handle, config_parse_qdisc_handle, QDISC_KIND_SFB, 0
StochasticFairBlue.PacketLimit, config_parse_stochastic_fair_blue_u32, QDISC_KIND_SFB, 0
"HierarchyTokenBucket\0"
"HierarchyTokenBucketClass\0"
"NetworkEmulator\0"
+ "PIE\0"
"StochasticFairBlue\0"
"StochasticFairnessQueueing\0"
"TokenBucketFilter\0"
--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1+
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "pie.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+static int pie_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+ proportional_integral_controller_enhanced *pie;
+ int r;
+
+ assert(link);
+ assert(qdisc);
+ assert(req);
+
+ pie = PIE(qdisc);
+
+ r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "pie");
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not open container TCA_OPTIONS: %m");
+
+ if (pie->packet_limit > 0) {
+ r = sd_netlink_message_append_u32(req, TCA_PIE_LIMIT, pie->packet_limit);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append TCA_PIE_PLIMIT attribute: %m");
+ }
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not close container TCA_OPTIONS: %m");
+
+ return 0;
+}
+
+int config_parse_pie_packet_limit(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
+ proportional_integral_controller_enhanced *pie;
+ Network *network = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = qdisc_new_static(QDISC_KIND_PIE, network, filename, section_line, &qdisc);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_syntax(unit, LOG_ERR, filename, line, r,
+ "More than one kind of queueing discipline, ignoring assignment: %m");
+
+ pie = PIE(qdisc);
+
+ if (isempty(rvalue)) {
+ pie->packet_limit = 0;
+
+ qdisc = NULL;
+ return 0;
+ }
+
+ r = safe_atou32(rvalue, &pie->packet_limit);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ qdisc = NULL;
+
+ return 0;
+}
+
+const QDiscVTable pie_vtable = {
+ .object_size = sizeof(proportional_integral_controller_enhanced),
+ .tca_kind = "pie",
+ .fill_message = pie_fill_message,
+};
--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1+
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct proportional_integral_controller_enhanced {
+ QDisc meta;
+
+ uint32_t packet_limit;
+} proportional_integral_controller_enhanced;
+
+DEFINE_QDISC_CAST(PIE, proportional_integral_controller_enhanced);
+extern const QDiscVTable pie_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_pie_packet_limit);
[QDISC_KIND_GRED] = &gred_vtable,
[QDISC_KIND_HTB] = &htb_vtable,
[QDISC_KIND_NETEM] = &netem_vtable,
+ [QDISC_KIND_PIE] = &pie_vtable,
[QDISC_KIND_PFIFO] = &pfifo_vtable,
[QDISC_KIND_SFB] = &sfb_vtable,
[QDISC_KIND_SFQ] = &sfq_vtable,
QDISC_KIND_HTB,
QDISC_KIND_NETEM,
QDISC_KIND_PFIFO,
+ QDISC_KIND_PIE,
QDISC_KIND_SFB,
QDISC_KIND_SFQ,
QDISC_KIND_TBF,
#include "fq.h"
#include "gred.h"
#include "htb.h"
+#include "pie.h"
#include "netem.h"
#include "sfb.h"
#include "sfq.h"
Parent=
Handle=
PacketLimit=
+[PIE]
+Parent=
+Handle=
+PacketLimit=