Merge pull request #15050 from ssahani/fq-pie

network: tc: add support for FQ-PIE packet scheduler

src/libsystemd/sd-netlink/netlink-types.c

@@ -870,6 +870,10 @@ static const NLType rtnl_tca_option_data_fq_codel_types[] = {
         [TCA_FQ_CODEL_MEMORY_LIMIT]    = { .type = NETLINK_TYPE_U32 },
 };
 
+static const NLType rtnl_tca_option_data_fq_pie_types[] = {
+        [TCA_FQ_PIE_LIMIT]   = { .type = NETLINK_TYPE_U32 },
+};
+
 static const NLType rtnl_tca_option_data_gred_types[] = {
         [TCA_GRED_DPS] = { .size = sizeof(struct tc_gred_sopt) },
 };
@@ -917,6 +921,7 @@ static const char* const nl_union_tca_option_data_table[] = {
         [NL_UNION_TCA_OPTION_DATA_ETS] = "ets",
         [NL_UNION_TCA_OPTION_DATA_FQ] = "fq",
         [NL_UNION_TCA_OPTION_DATA_FQ_CODEL] = "fq_codel",
+        [NL_UNION_TCA_OPTION_DATA_FQ_PIE] = "fq_pie",
         [NL_UNION_TCA_OPTION_DATA_GRED] = "gred",
         [NL_UNION_TCA_OPTION_DATA_HHF] = "hhf",
         [NL_UNION_TCA_OPTION_DATA_HTB] = "htb",
@@ -941,6 +946,8 @@ static const NLTypeSystem rtnl_tca_option_data_type_systems[] = {
                                                    .types = rtnl_tca_option_data_fq_types },
         [NL_UNION_TCA_OPTION_DATA_FQ_CODEL] =    { .count = ELEMENTSOF(rtnl_tca_option_data_fq_codel_types),
                                                    .types = rtnl_tca_option_data_fq_codel_types },
+        [NL_UNION_TCA_OPTION_DATA_FQ_PIE] =      { .count = ELEMENTSOF(rtnl_tca_option_data_fq_pie_types),
+                                                   .types = rtnl_tca_option_data_fq_pie_types },
         [NL_UNION_TCA_OPTION_DATA_GRED] =        { .count = ELEMENTSOF(rtnl_tca_option_data_gred_types),
                                                    .types = rtnl_tca_option_data_gred_types },
         [NL_UNION_TCA_OPTION_DATA_HHF] =         { .count = ELEMENTSOF(rtnl_tca_option_data_hhf_types),

src/libsystemd/sd-netlink/netlink-types.h

@@ -103,6 +103,7 @@ typedef enum NLUnionTCAOptionData {
         NL_UNION_TCA_OPTION_DATA_ETS,
         NL_UNION_TCA_OPTION_DATA_FQ,
         NL_UNION_TCA_OPTION_DATA_FQ_CODEL,
+        NL_UNION_TCA_OPTION_DATA_FQ_PIE,
         NL_UNION_TCA_OPTION_DATA_GRED,
         NL_UNION_TCA_OPTION_DATA_HHF,
         NL_UNION_TCA_OPTION_DATA_HTB,

src/network/meson.build

@@ -129,6 +129,8 @@ sources = files('''
         tc/fq.h
         tc/fq-codel.c
         tc/fq-codel.h
+        tc/fq-pie.c
+        tc/fq-pie.h
         tc/gred.c
         tc/gred.h
         tc/hhf.c

src/network/networkd-network-gperf.gperf

@@ -364,6 +364,9 @@ FairQueueingControlledDelay.TargetSec,       config_parse_fair_queueing_controll
 FairQueueingControlledDelay.IntervalSec,     config_parse_fair_queueing_controlled_delay_usec,         QDISC_KIND_FQ_CODEL,           0
 FairQueueingControlledDelay.CEThresholdSec,  config_parse_fair_queueing_controlled_delay_usec,         QDISC_KIND_FQ_CODEL,           0
 FairQueueingControlledDelay.ECN,             config_parse_fair_queueing_controlled_delay_bool,         QDISC_KIND_FQ_CODEL,           0
+FlowQueuePIE.Parent,                         config_parse_qdisc_parent,                                QDISC_KIND_FQ_PIE,             0
+FlowQueuePIE.Handle,                         config_parse_qdisc_handle,                                QDISC_KIND_FQ_PIE,             0
+FlowQueuePIE.PacketLimit,                    config_parse_fq_pie_packet_limit,                         QDISC_KIND_FQ_PIE,             0
 GenericRandomEarlyDetection.Parent,          config_parse_qdisc_parent,                                QDISC_KIND_GRED,               0
 GenericRandomEarlyDetection.Handle,          config_parse_qdisc_handle,                                QDISC_KIND_GRED,               0
 GenericRandomEarlyDetection.VirtualQueues,   config_parse_generic_random_early_detection_u32,          QDISC_KIND_GRED,               0

src/network/networkd-network.c

@@ -538,6 +538,7 @@ int network_load_one(Manager *manager, OrderedHashmap **networks, const char *fi
                         "EnhancedTransmissionSelection\0"
                         "FairQueueing\0"
                         "FairQueueingControlledDelay\0"
+                        "FlowQueuePIE\0"
                         "GenericRandomEarlyDetection\0"
                         "HeavyHitterFilter\0"
                         "HierarchyTokenBucket\0"

src/network/tc/fq-pie.c

@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: LGPL-2.1+
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "fq-pie.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+static int fq_pie_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        FlowQueuePIE *fq_pie;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        fq_pie = FQ_PIE(qdisc);
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "fq_pie");
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not open container TCA_OPTIONS: %m");
+
+        if (fq_pie->packet_limit > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_PIE_LIMIT, fq_pie->packet_limit);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not append TCA_FQ_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_fq_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;
+        FlowQueuePIE *fq_pie;
+        Network *network = data;
+        uint32_t val;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = qdisc_new_static(QDISC_KIND_FQ_PIE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0)
+                return log_syntax(unit, LOG_WARNING, filename, line, r,
+                                  "More than one kind of queueing discipline, ignoring assignment: %m");
+
+        fq_pie = FQ_PIE(qdisc);
+
+        if (isempty(rvalue)) {
+                fq_pie->packet_limit = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &val);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (val == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        fq_pie->packet_limit = val;
+        qdisc = NULL;
+
+        return 0;
+}
+
+const QDiscVTable fq_pie_vtable = {
+        .object_size = sizeof(FlowQueuePIE),
+        .tca_kind = "fq_pie",
+        .fill_message = fq_pie_fill_message,
+};

src/network/tc/fq-pie.h

@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: LGPL-2.1+
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct FlowQueuePIE {
+        QDisc meta;
+
+        uint32_t packet_limit;
+} FlowQueuePIE;
+
+DEFINE_QDISC_CAST(FQ_PIE, FlowQueuePIE);
+extern const QDiscVTable fq_pie_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_fq_pie_packet_limit);

src/network/tc/qdisc.c

@@ -23,6 +23,7 @@ const QDiscVTable * const qdisc_vtable[_QDISC_KIND_MAX] = {
         [QDISC_KIND_ETS] = &ets_vtable,
         [QDISC_KIND_FQ] = &fq_vtable,
         [QDISC_KIND_FQ_CODEL] = &fq_codel_vtable,
+        [QDISC_KIND_FQ_PIE] = &fq_pie_vtable,
         [QDISC_KIND_GRED] = &gred_vtable,
         [QDISC_KIND_HHF] = &hhf_vtable,
         [QDISC_KIND_HTB] = &htb_vtable,

src/network/tc/qdisc.h

@@ -16,6 +16,7 @@ typedef enum QDiscKind {
         QDISC_KIND_ETS,
         QDISC_KIND_FQ,
         QDISC_KIND_FQ_CODEL,
+        QDISC_KIND_FQ_PIE,
         QDISC_KIND_GRED,
         QDISC_KIND_HHF,
         QDISC_KIND_HTB,
@@ -91,6 +92,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_qdisc_handle);
 #include "ets.h"
 #include "fifo.h"
 #include "fq-codel.h"
+#include "fq-pie.h"
 #include "fq.h"
 #include "gred.h"
 #include "hhf.h"