Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

44 files changed, 6595 insertions, 0 deletions

diff --git a/src/network/tc/cake.c b/src/network/tc/cake.c
new file mode 100644
index 0000000..c495faf
--- /dev/null
+++ b/src/network/tc/cake.c
@@ -0,0 +1,737 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "cake.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "string-table.h"
+#include "string-util.h"
+
+static int cake_init(QDisc *qdisc) {
+        CommonApplicationsKeptEnhanced *c;
+
+        assert(qdisc);
+
+        c = CAKE(qdisc);
+
+        c->autorate = -1;
+        c->compensation_mode = _CAKE_COMPENSATION_MODE_INVALID;
+        c->raw = -1;
+        c->flow_isolation_mode = _CAKE_FLOW_ISOLATION_MODE_INVALID;
+        c->nat = -1;
+        c->preset = _CAKE_PRESET_INVALID;
+        c->wash = -1;
+        c->split_gso = -1;
+        c->ack_filter = _CAKE_ACK_FILTER_INVALID;
+
+        return 0;
+}
+
+static int cake_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        CommonApplicationsKeptEnhanced *c;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(c = CAKE(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "cake");
+        if (r < 0)
+                return r;
+
+        if (c->bandwidth > 0) {
+                r = sd_netlink_message_append_u64(req, TCA_CAKE_BASE_RATE64, c->bandwidth);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->autorate >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_AUTORATE, c->autorate);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->overhead_set) {
+                r = sd_netlink_message_append_s32(req, TCA_CAKE_OVERHEAD, c->overhead);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->mpu > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_MPU, c->mpu);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->compensation_mode >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_ATM, c->compensation_mode);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->raw > 0) {
+                /* TCA_CAKE_RAW attribute is mostly a flag, not boolean. */
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_RAW, 0);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->flow_isolation_mode >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_FLOW_MODE, c->flow_isolation_mode);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->nat >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_NAT, c->nat);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->preset >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_DIFFSERV_MODE, c->preset);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->fwmark > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_FWMARK, c->fwmark);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->wash >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_WASH, c->wash);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->split_gso >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_SPLIT_GSO, c->split_gso);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->rtt > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_RTT, c->rtt);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->ack_filter >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CAKE_ACK_FILTER, c->ack_filter);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_cake_bandwidth(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        uint64_t k;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->bandwidth = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1000, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->bandwidth = k/8;
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_cake_overhead(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        int32_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->overhead_set = false;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atoi32(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (v < -64 || v > 256) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->overhead = v;
+        c->overhead_set = true;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+int config_parse_cake_mpu(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        uint32_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->mpu = 0;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (v <= 0 || v > 256) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->mpu = v;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+int config_parse_cake_tristate(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        int *dest, r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (streq(lvalue, "AutoRateIngress"))
+                dest = &c->autorate;
+        else if (streq(lvalue, "UseRawPacketSize"))
+                dest = &c->raw;
+        else if (streq(lvalue, "NAT"))
+                dest = &c->nat;
+        else if (streq(lvalue, "Wash"))
+                dest = &c->wash;
+        else if (streq(lvalue, "SplitGSO"))
+                dest = &c->split_gso;
+        else
+                assert_not_reached();
+
+        r = parse_tristate(rvalue, dest);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+static const char * const cake_compensation_mode_table[_CAKE_COMPENSATION_MODE_MAX] = {
+        [CAKE_COMPENSATION_MODE_NONE] = "none",
+        [CAKE_COMPENSATION_MODE_ATM]  = "atm",
+        [CAKE_COMPENSATION_MODE_PTM]  = "ptm",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(cake_compensation_mode, CakeCompensationMode);
+
+int config_parse_cake_compensation_mode(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        CakeCompensationMode mode;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->compensation_mode = _CAKE_COMPENSATION_MODE_INVALID;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        mode = cake_compensation_mode_from_string(rvalue);
+        if (mode < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, mode,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->compensation_mode = mode;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+static const char * const cake_flow_isolation_mode_table[_CAKE_FLOW_ISOLATION_MODE_MAX] = {
+        [CAKE_FLOW_ISOLATION_MODE_NONE]     = "none",
+        [CAKE_FLOW_ISOLATION_MODE_SRC_IP]   = "src-host",
+        [CAKE_FLOW_ISOLATION_MODE_DST_IP]   = "dst-host",
+        [CAKE_FLOW_ISOLATION_MODE_HOSTS]    = "hosts",
+        [CAKE_FLOW_ISOLATION_MODE_FLOWS]    = "flows",
+        [CAKE_FLOW_ISOLATION_MODE_DUAL_SRC] = "dual-src-host",
+        [CAKE_FLOW_ISOLATION_MODE_DUAL_DST] = "dual-dst-host",
+        [CAKE_FLOW_ISOLATION_MODE_TRIPLE]   = "triple",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(cake_flow_isolation_mode, CakeFlowIsolationMode);
+
+int config_parse_cake_flow_isolation_mode(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        CakeFlowIsolationMode mode;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->flow_isolation_mode = _CAKE_FLOW_ISOLATION_MODE_INVALID;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        mode = cake_flow_isolation_mode_from_string(rvalue);
+        if (mode < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, mode,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->flow_isolation_mode = mode;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+static const char * const cake_priority_queueing_preset_table[_CAKE_PRESET_MAX] = {
+        [CAKE_PRESET_DIFFSERV3]  = "diffserv3",
+        [CAKE_PRESET_DIFFSERV4]  = "diffserv4",
+        [CAKE_PRESET_DIFFSERV8]  = "diffserv8",
+        [CAKE_PRESET_BESTEFFORT] = "besteffort",
+        [CAKE_PRESET_PRECEDENCE] = "precedence",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(cake_priority_queueing_preset, CakePriorityQueueingPreset);
+
+int config_parse_cake_priority_queueing_preset(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        CakePriorityQueueingPreset preset;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->preset = _CAKE_PRESET_INVALID;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        preset = cake_priority_queueing_preset_from_string(rvalue);
+        if (preset < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, preset,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->preset = preset;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+int config_parse_cake_fwmark(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        uint32_t fwmark;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->fwmark = 0;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &fwmark);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (fwmark <= 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->fwmark = fwmark;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+int config_parse_cake_rtt(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        Network *network = ASSERT_PTR(data);
+        usec_t t;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->rtt = 0;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_sec(rvalue, &t);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (t <= 0 || t > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->rtt = t;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+static const char * const cake_ack_filter_table[_CAKE_ACK_FILTER_MAX] = {
+        [CAKE_ACK_FILTER_NO]         = "no",
+        [CAKE_ACK_FILTER_YES]        = "yes",
+        [CAKE_ACK_FILTER_AGGRESSIVE] = "aggressive",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(cake_ack_filter, CakeAckFilter, CAKE_ACK_FILTER_YES);
+
+int config_parse_cake_ack_filter(
+                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;
+        CommonApplicationsKeptEnhanced *c;
+        CakeAckFilter ack_filter;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CAKE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        c = CAKE(qdisc);
+
+        if (isempty(rvalue)) {
+                c->ack_filter = _CAKE_ACK_FILTER_INVALID;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        ack_filter = cake_ack_filter_from_string(rvalue);
+        if (ack_filter < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, ack_filter,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        c->ack_filter = ack_filter;
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+const QDiscVTable cake_vtable = {
+        .object_size = sizeof(CommonApplicationsKeptEnhanced),
+        .tca_kind = "cake",
+        .init = cake_init,
+        .fill_message = cake_fill_message,
+};
diff --git a/src/network/tc/cake.h b/src/network/tc/cake.h
new file mode 100644
index 0000000..5ca6dc6
--- /dev/null
+++ b/src/network/tc/cake.h
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include <linux/pkt_sched.h>
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef enum CakeCompensationMode {
+        CAKE_COMPENSATION_MODE_NONE = CAKE_ATM_NONE,
+        CAKE_COMPENSATION_MODE_ATM  = CAKE_ATM_ATM,
+        CAKE_COMPENSATION_MODE_PTM  = CAKE_ATM_PTM,
+        _CAKE_COMPENSATION_MODE_MAX,
+        _CAKE_COMPENSATION_MODE_INVALID = -EINVAL,
+} CakeCompensationMode;
+
+typedef enum CakeFlowIsolationMode {
+        CAKE_FLOW_ISOLATION_MODE_NONE     = CAKE_FLOW_NONE,
+        CAKE_FLOW_ISOLATION_MODE_SRC_IP   = CAKE_FLOW_SRC_IP,
+        CAKE_FLOW_ISOLATION_MODE_DST_IP   = CAKE_FLOW_DST_IP,
+        CAKE_FLOW_ISOLATION_MODE_HOSTS    = CAKE_FLOW_HOSTS,
+        CAKE_FLOW_ISOLATION_MODE_FLOWS    = CAKE_FLOW_FLOWS,
+        CAKE_FLOW_ISOLATION_MODE_DUAL_SRC = CAKE_FLOW_DUAL_SRC,
+        CAKE_FLOW_ISOLATION_MODE_DUAL_DST = CAKE_FLOW_DUAL_DST,
+        CAKE_FLOW_ISOLATION_MODE_TRIPLE   = CAKE_FLOW_TRIPLE,
+        _CAKE_FLOW_ISOLATION_MODE_MAX,
+        _CAKE_FLOW_ISOLATION_MODE_INVALID = -EINVAL,
+} CakeFlowIsolationMode;
+
+typedef enum CakePriorityQueueingPreset {
+        CAKE_PRESET_DIFFSERV3  = CAKE_DIFFSERV_DIFFSERV3,
+        CAKE_PRESET_DIFFSERV4  = CAKE_DIFFSERV_DIFFSERV4,
+        CAKE_PRESET_DIFFSERV8  = CAKE_DIFFSERV_DIFFSERV8,
+        CAKE_PRESET_BESTEFFORT = CAKE_DIFFSERV_BESTEFFORT,
+        CAKE_PRESET_PRECEDENCE = CAKE_DIFFSERV_PRECEDENCE,
+        _CAKE_PRESET_MAX,
+        _CAKE_PRESET_INVALID = -EINVAL,
+} CakePriorityQueueingPreset;
+
+typedef enum CakeAckFilter {
+        CAKE_ACK_FILTER_NO         = CAKE_ACK_NONE,
+        CAKE_ACK_FILTER_YES        = CAKE_ACK_FILTER,
+        CAKE_ACK_FILTER_AGGRESSIVE = CAKE_ACK_AGGRESSIVE,
+        _CAKE_ACK_FILTER_MAX,
+        _CAKE_ACK_FILTER_INVALID   = -EINVAL,
+} CakeAckFilter;
+
+typedef struct CommonApplicationsKeptEnhanced {
+        QDisc meta;
+
+        /* Shaper parameters */
+        int autorate;
+        uint64_t bandwidth;
+
+        /* Overhead compensation parameters */
+        bool overhead_set;
+        int overhead;
+        uint32_t mpu;
+        CakeCompensationMode compensation_mode;
+        int raw;
+
+        /* Flow isolation parameters */
+        CakeFlowIsolationMode flow_isolation_mode;
+        int nat;
+
+        /* Priority queue parameters */
+        CakePriorityQueueingPreset preset;
+        uint32_t fwmark;
+
+        /* Other parameters */
+        int wash;
+        int split_gso;
+        usec_t rtt;
+        CakeAckFilter ack_filter;
+} CommonApplicationsKeptEnhanced;
+
+DEFINE_QDISC_CAST(CAKE, CommonApplicationsKeptEnhanced);
+extern const QDiscVTable cake_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_bandwidth);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_overhead);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_mpu);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_tristate);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_compensation_mode);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_flow_isolation_mode);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_priority_queueing_preset);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_fwmark);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_rtt);
+CONFIG_PARSER_PROTOTYPE(config_parse_cake_ack_filter);
diff --git a/src/network/tc/codel.c b/src/network/tc/codel.c
new file mode 100644
index 0000000..e212523
--- /dev/null
+++ b/src/network/tc/codel.c
@@ -0,0 +1,244 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "string-util.h"
+
+static int controlled_delay_init(QDisc *qdisc) {
+        ControlledDelay *cd;
+
+        assert(qdisc);
+
+        cd = CODEL(qdisc);
+
+        cd->ce_threshold_usec = USEC_INFINITY;
+        cd->ecn = -1;
+
+        return 0;
+}
+
+static int controlled_delay_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        ControlledDelay *cd;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(cd = CODEL(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "codel");
+        if (r < 0)
+                return r;
+
+        if (cd->packet_limit > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CODEL_LIMIT, cd->packet_limit);
+                if (r < 0)
+                        return r;
+        }
+
+        if (cd->interval_usec > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CODEL_INTERVAL, cd->interval_usec);
+                if (r < 0)
+                        return r;
+        }
+
+        if (cd->target_usec > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CODEL_TARGET, cd->target_usec);
+                if (r < 0)
+                        return r;
+        }
+
+        if (cd->ecn >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_CODEL_ECN, cd->ecn);
+                if (r < 0)
+                        return r;
+        }
+
+        if (cd->ce_threshold_usec != USEC_INFINITY) {
+                r = sd_netlink_message_append_u32(req, TCA_CODEL_CE_THRESHOLD, cd->ce_threshold_usec);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_controlled_delay_u32(
+                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;
+        ControlledDelay *cd;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CODEL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        cd = CODEL(qdisc);
+
+        if (isempty(rvalue)) {
+                cd->packet_limit = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &cd->packet_limit);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_controlled_delay_usec(
+                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;
+        ControlledDelay *cd;
+        Network *network = ASSERT_PTR(data);
+        usec_t *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CODEL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        cd = CODEL(qdisc);
+
+        if (streq(lvalue, "TargetSec"))
+                p = &cd->target_usec;
+        else if (streq(lvalue, "IntervalSec"))
+                p = &cd->interval_usec;
+        else if (streq(lvalue, "CEThresholdSec"))
+                p = &cd->ce_threshold_usec;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                if (streq(lvalue, "CEThresholdSec"))
+                        *p = USEC_INFINITY;
+                else
+                        *p = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = parse_sec(rvalue, p);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_controlled_delay_bool(
+                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;
+        ControlledDelay *cd;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_CODEL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        cd = CODEL(qdisc);
+
+        r = parse_tristate(rvalue, &cd->ecn);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+const QDiscVTable codel_vtable = {
+        .object_size = sizeof(ControlledDelay),
+        .tca_kind = "codel",
+        .init = controlled_delay_init,
+        .fill_message = controlled_delay_fill_message,
+};
diff --git a/src/network/tc/codel.h b/src/network/tc/codel.h
new file mode 100644
index 0000000..4fe5283
--- /dev/null
+++ b/src/network/tc/codel.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+#include "time-util.h"
+
+typedef struct ControlledDelay {
+        QDisc meta;
+
+        uint32_t packet_limit;
+        usec_t interval_usec;
+        usec_t target_usec;
+        usec_t ce_threshold_usec;
+        int ecn;
+} ControlledDelay;
+
+DEFINE_QDISC_CAST(CODEL, ControlledDelay);
+extern const QDiscVTable codel_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_controlled_delay_u32);
+CONFIG_PARSER_PROTOTYPE(config_parse_controlled_delay_usec);
+CONFIG_PARSER_PROTOTYPE(config_parse_controlled_delay_bool);
diff --git a/src/network/tc/drr.c b/src/network/tc/drr.c
new file mode 100644
index 0000000..373911b
--- /dev/null
+++ b/src/network/tc/drr.c
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "drr.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+const QDiscVTable drr_vtable = {
+        .object_size = sizeof(DeficitRoundRobinScheduler),
+        .tca_kind = "drr",
+};
+
+static int drr_class_fill_message(Link *link, TClass *tclass, sd_netlink_message *req) {
+        DeficitRoundRobinSchedulerClass *drr;
+        int r;
+
+        assert(link);
+        assert(tclass);
+        assert(req);
+
+        assert_se(drr = TCLASS_TO_DRR(tclass));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "drr");
+        if (r < 0)
+                return r;
+
+        if (drr->quantum > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_DRR_QUANTUM, drr->quantum);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_drr_size(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        DeficitRoundRobinSchedulerClass *drr;
+        Network *network = ASSERT_PTR(data);
+        uint64_t u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(TCLASS_KIND_DRR, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        drr = TCLASS_TO_DRR(tclass);
+
+        if (isempty(rvalue)) {
+                drr->quantum = 0;
+
+                TAKE_PTR(tclass);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &u);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (u > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        drr->quantum = (uint32_t) u;
+
+        TAKE_PTR(tclass);
+        return 0;
+}
+
+const TClassVTable drr_tclass_vtable = {
+        .object_size = sizeof(DeficitRoundRobinSchedulerClass),
+        .tca_kind = "drr",
+        .fill_message = drr_class_fill_message,
+};
diff --git a/src/network/tc/drr.h b/src/network/tc/drr.h
new file mode 100644
index 0000000..c96cc4d
--- /dev/null
+++ b/src/network/tc/drr.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "qdisc.h"
+
+typedef struct DeficitRoundRobinScheduler {
+        QDisc meta;
+} DeficitRoundRobinScheduler;
+
+DEFINE_QDISC_CAST(DRR, DeficitRoundRobinScheduler);
+extern const QDiscVTable drr_vtable;
+
+typedef struct DeficitRoundRobinSchedulerClass {
+        TClass meta;
+
+        uint32_t quantum;
+} DeficitRoundRobinSchedulerClass;
+
+DEFINE_TCLASS_CAST(DRR, DeficitRoundRobinSchedulerClass);
+extern const TClassVTable drr_tclass_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_drr_size);
diff --git a/src/network/tc/ets.c b/src/network/tc/ets.c
new file mode 100644
index 0000000..730b0a1
--- /dev/null
+++ b/src/network/tc/ets.c
@@ -0,0 +1,342 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "ets.h"
+#include "extract-word.h"
+#include "memory-util.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "string-util.h"
+#include "tc-util.h"
+
+static int enhanced_transmission_selection_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        EnhancedTransmissionSelection *ets;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(ets = ETS(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "ets");
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(req, TCA_ETS_NBANDS, ets->n_bands);
+        if (r < 0)
+                return r;
+
+        if (ets->n_strict > 0) {
+                r = sd_netlink_message_append_u8(req, TCA_ETS_NSTRICT, ets->n_strict);
+                if (r < 0)
+                        return r;
+        }
+
+        if (ets->n_quanta > 0) {
+                r = sd_netlink_message_open_container(req, TCA_ETS_QUANTA);
+                if (r < 0)
+                        return r;
+
+                for (unsigned i = 0; i < ets->n_quanta; i++) {
+                        r = sd_netlink_message_append_u32(req, TCA_ETS_QUANTA_BAND, ets->quanta[i]);
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_close_container(req);
+                if (r < 0)
+                        return r;
+        }
+
+        if (ets->n_prio > 0) {
+                r = sd_netlink_message_open_container(req, TCA_ETS_PRIOMAP);
+                if (r < 0)
+                        return r;
+
+                for (unsigned i = 0; i < ets->n_prio; i++) {
+                        r = sd_netlink_message_append_u8(req, TCA_ETS_PRIOMAP_BAND, ets->prio[i]);
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_close_container(req);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_ets_u8(
+                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;
+        EnhancedTransmissionSelection *ets;
+        Network *network = ASSERT_PTR(data);
+        uint8_t v, *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_ETS, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        ets = ETS(qdisc);
+        if (streq(lvalue, "Bands"))
+                p = &ets->n_bands;
+        else if (streq(lvalue, "StrictBands"))
+                p = &ets->n_strict;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *p = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = safe_atou8(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (v > TCQ_ETS_MAX_BANDS) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s='. The value must be <= %d, ignoring assignment: %s",
+                           lvalue, TCQ_ETS_MAX_BANDS, rvalue);
+                return 0;
+        }
+
+        *p = v;
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_ets_quanta(
+                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;
+        EnhancedTransmissionSelection *ets;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_ETS, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        ets = ETS(qdisc);
+
+        if (isempty(rvalue)) {
+                memzero(ets->quanta, sizeof(uint32_t) * TCQ_ETS_MAX_BANDS);
+                ets->n_quanta = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ char *word = NULL;
+                uint64_t v;
+
+                r = extract_first_word(&p, &word, NULL, 0);
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to extract next value, ignoring: %m");
+                        break;
+                }
+                if (r == 0)
+                        break;
+
+                r = parse_size(word, 1024, &v);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse '%s=', ignoring assignment: %s",
+                                   lvalue, word);
+                        continue;
+                }
+                if (v == 0 || v > UINT32_MAX) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Invalid '%s=', ignoring assignment: %s",
+                                   lvalue, word);
+                        continue;
+                }
+                if (ets->n_quanta >= TCQ_ETS_MAX_BANDS) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Too many quanta in '%s=', ignoring assignment: %s",
+                                   lvalue, word);
+                        continue;
+                }
+
+                ets->quanta[ets->n_quanta++] = v;
+        }
+
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_ets_prio(
+                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;
+        EnhancedTransmissionSelection *ets;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_ETS, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        ets = ETS(qdisc);
+
+        if (isempty(rvalue)) {
+                memzero(ets->prio, sizeof(uint8_t) * (TC_PRIO_MAX + 1));
+                ets->n_prio = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ char *word = NULL;
+                uint8_t v;
+
+                r = extract_first_word(&p, &word, NULL, 0);
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to extract next value, ignoring: %m");
+                        break;
+                }
+                if (r == 0)
+                        break;
+
+                r = safe_atou8(word, &v);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse '%s=', ignoring assignment: %s",
+                                   lvalue, word);
+                        continue;
+                }
+                if (ets->n_prio > TC_PRIO_MAX) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Too many priomap in '%s=', ignoring assignment: %s",
+                                   lvalue, word);
+                        continue;
+                }
+
+                ets->prio[ets->n_prio++] = v;
+        }
+
+        qdisc = NULL;
+
+        return 0;
+}
+
+static int enhanced_transmission_selection_verify(QDisc *qdisc) {
+        EnhancedTransmissionSelection *ets;
+
+        assert(qdisc);
+
+        ets = ETS(qdisc);
+
+        if (ets->n_bands == 0)
+                ets->n_bands = ets->n_strict + ets->n_quanta;
+
+        if (ets->n_bands == 0)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: At least one of Band=, Strict=, or Quanta= must be specified. "
+                                         "Ignoring [EnhancedTransmissionSelection] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        if (ets->n_bands < ets->n_strict + ets->n_quanta)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: Not enough total bands to cover all the strict bands and quanta. "
+                                         "Ignoring [EnhancedTransmissionSelection] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        for (unsigned i = 0; i < ets->n_prio; i++)
+                if (ets->prio[i] >= ets->n_bands)
+                        return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                                 "%s: PriorityMap= element is out of bands. "
+                                                 "Ignoring [EnhancedTransmissionSelection] section from line %u.",
+                                                 qdisc->section->filename, qdisc->section->line);
+
+        return 0;
+}
+
+const QDiscVTable ets_vtable = {
+        .object_size = sizeof(EnhancedTransmissionSelection),
+        .tca_kind = "ets",
+        .fill_message = enhanced_transmission_selection_fill_message,
+        .verify = enhanced_transmission_selection_verify,
+};
diff --git a/src/network/tc/ets.h b/src/network/tc/ets.h
new file mode 100644
index 0000000..b6dd428
--- /dev/null
+++ b/src/network/tc/ets.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <linux/pkt_sched.h>
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct EnhancedTransmissionSelection {
+        QDisc meta;
+
+        uint8_t n_bands;
+        uint8_t n_strict;
+        unsigned n_quanta;
+        uint32_t quanta[TCQ_ETS_MAX_BANDS];
+        unsigned n_prio;
+        uint8_t prio[TC_PRIO_MAX + 1];
+} EnhancedTransmissionSelection;
+
+DEFINE_QDISC_CAST(ETS, EnhancedTransmissionSelection);
+extern const QDiscVTable ets_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_ets_u8);
+CONFIG_PARSER_PROTOTYPE(config_parse_ets_quanta);
+CONFIG_PARSER_PROTOTYPE(config_parse_ets_prio);
diff --git a/src/network/tc/fifo.c b/src/network/tc/fifo.c
new file mode 100644
index 0000000..940fa00
--- /dev/null
+++ b/src/network/tc/fifo.c
@@ -0,0 +1,183 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "fifo.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+static int fifo_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        FirstInFirstOut *fifo;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        switch (qdisc->kind) {
+        case QDISC_KIND_PFIFO:
+                assert_se(fifo = PFIFO(qdisc));
+                break;
+        case QDISC_KIND_BFIFO:
+                assert_se(fifo = BFIFO(qdisc));
+                break;
+        case QDISC_KIND_PFIFO_HEAD_DROP:
+                assert_se(fifo = PFIFO_HEAD_DROP(qdisc));
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        const struct tc_fifo_qopt opt = { .limit = fifo->limit };
+        r = sd_netlink_message_append_data(req, TCA_OPTIONS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_pfifo_size(
+                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;
+        Network *network = ASSERT_PTR(data);
+        FirstInFirstOut *fifo;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(ltype, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        switch (qdisc->kind) {
+        case QDISC_KIND_PFIFO:
+                fifo = PFIFO(qdisc);
+                break;
+        case QDISC_KIND_PFIFO_HEAD_DROP:
+                fifo = PFIFO_HEAD_DROP(qdisc);
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        if (isempty(rvalue)) {
+                fifo->limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &fifo->limit);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+int config_parse_bfifo_size(
+                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;
+        Network *network = ASSERT_PTR(data);
+        FirstInFirstOut *fifo;
+        uint64_t u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_BFIFO, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fifo = BFIFO(qdisc);
+
+        if (isempty(rvalue)) {
+                fifo->limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &u);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (u > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        fifo->limit = (uint32_t) u;
+
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+const QDiscVTable pfifo_vtable = {
+        .object_size = sizeof(FirstInFirstOut),
+        .tca_kind = "pfifo",
+        .fill_message = fifo_fill_message,
+};
+
+const QDiscVTable bfifo_vtable = {
+       .object_size = sizeof(FirstInFirstOut),
+       .tca_kind = "bfifo",
+       .fill_message = fifo_fill_message,
+};
+
+const QDiscVTable pfifo_head_drop_vtable = {
+       .object_size = sizeof(FirstInFirstOut),
+       .tca_kind = "pfifo_head_drop",
+       .fill_message = fifo_fill_message,
+};
+
+const QDiscVTable pfifo_fast_vtable = {
+       .object_size = sizeof(FirstInFirstOut),
+       .tca_kind = "pfifo_fast",
+};
diff --git a/src/network/tc/fifo.h b/src/network/tc/fifo.h
new file mode 100644
index 0000000..b9bbd09
--- /dev/null
+++ b/src/network/tc/fifo.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct FirstInFirstOut {
+        QDisc meta;
+
+        uint32_t limit;
+} FirstInFirstOut;
+
+DEFINE_QDISC_CAST(PFIFO, FirstInFirstOut);
+DEFINE_QDISC_CAST(BFIFO, FirstInFirstOut);
+DEFINE_QDISC_CAST(PFIFO_HEAD_DROP, FirstInFirstOut);
+DEFINE_QDISC_CAST(PFIFO_FAST, FirstInFirstOut);
+
+extern const QDiscVTable pfifo_vtable;
+extern const QDiscVTable bfifo_vtable;
+extern const QDiscVTable pfifo_head_drop_vtable;
+extern const QDiscVTable pfifo_fast_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_pfifo_size);
+CONFIG_PARSER_PROTOTYPE(config_parse_bfifo_size);
diff --git a/src/network/tc/fq-codel.c b/src/network/tc/fq-codel.c
new file mode 100644
index 0000000..124faf7
--- /dev/null
+++ b/src/network/tc/fq-codel.c
@@ -0,0 +1,343 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "string-util.h"
+#include "strv.h"
+
+static int fair_queueing_controlled_delay_init(QDisc *qdisc) {
+        FairQueueingControlledDelay *fqcd;
+
+        assert(qdisc);
+
+        fqcd = FQ_CODEL(qdisc);
+
+        fqcd->memory_limit = UINT32_MAX;
+        fqcd->ce_threshold_usec = USEC_INFINITY;
+        fqcd->ecn = -1;
+
+        return 0;
+}
+
+static int fair_queueing_controlled_delay_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        FairQueueingControlledDelay *fqcd;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(fqcd = FQ_CODEL(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "fq_codel");
+        if (r < 0)
+                return r;
+
+        if (fqcd->packet_limit > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_LIMIT, fqcd->packet_limit);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fqcd->flows > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_FLOWS, fqcd->flows);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fqcd->quantum > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_QUANTUM, fqcd->quantum);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fqcd->interval_usec > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_INTERVAL, fqcd->interval_usec);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fqcd->target_usec > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_TARGET, fqcd->target_usec);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fqcd->ecn >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_ECN, fqcd->ecn);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fqcd->ce_threshold_usec != USEC_INFINITY) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_CE_THRESHOLD, fqcd->ce_threshold_usec);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fqcd->memory_limit != UINT32_MAX) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CODEL_MEMORY_LIMIT, fqcd->memory_limit);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_fair_queueing_controlled_delay_u32(
+                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;
+        FairQueueingControlledDelay *fqcd;
+        Network *network = ASSERT_PTR(data);
+        uint32_t *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ_CODEL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fqcd = FQ_CODEL(qdisc);
+
+        if (streq(lvalue, "PacketLimit"))
+                p = &fqcd->packet_limit;
+        else if (streq(lvalue, "Flows"))
+                p = &fqcd->flows;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *p = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, p);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_fair_queueing_controlled_delay_usec(
+                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;
+        FairQueueingControlledDelay *fqcd;
+        Network *network = ASSERT_PTR(data);
+        usec_t *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ_CODEL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fqcd = FQ_CODEL(qdisc);
+
+        if (streq(lvalue, "TargetSec"))
+                p = &fqcd->target_usec;
+        else if (streq(lvalue, "IntervalSec"))
+                p = &fqcd->interval_usec;
+        else if (streq(lvalue, "CEThresholdSec"))
+                p = &fqcd->ce_threshold_usec;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                if (streq(lvalue, "CEThresholdSec"))
+                        *p = USEC_INFINITY;
+                else
+                        *p = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_sec(rvalue, p);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_fair_queueing_controlled_delay_bool(
+                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;
+        FairQueueingControlledDelay *fqcd;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ_CODEL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fqcd = FQ_CODEL(qdisc);
+
+        r = parse_tristate(rvalue, &fqcd->ecn);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_fair_queueing_controlled_delay_size(
+                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;
+        FairQueueingControlledDelay *fqcd;
+        Network *network = ASSERT_PTR(data);
+        uint64_t sz;
+        uint32_t *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ_CODEL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fqcd = FQ_CODEL(qdisc);
+
+        if (STR_IN_SET(lvalue, "MemoryLimitBytes", "MemoryLimit"))
+                p = &fqcd->memory_limit;
+        else if (STR_IN_SET(lvalue, "QuantumBytes", "Quantum"))
+                p = &fqcd->quantum;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                if (STR_IN_SET(lvalue, "MemoryLimitBytes", "MemoryLimit"))
+                        *p = UINT32_MAX;
+                else
+                        *p = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &sz);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (sz >= UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified '%s=' is too large, ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        *p = sz;
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+const QDiscVTable fq_codel_vtable = {
+        .object_size = sizeof(FairQueueingControlledDelay),
+        .tca_kind = "fq_codel",
+        .init = fair_queueing_controlled_delay_init,
+        .fill_message = fair_queueing_controlled_delay_fill_message,
+};
diff --git a/src/network/tc/fq-codel.h b/src/network/tc/fq-codel.h
new file mode 100644
index 0000000..2553c59
--- /dev/null
+++ b/src/network/tc/fq-codel.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+#include "time-util.h"
+
+typedef struct FairQueueingControlledDelay {
+        QDisc meta;
+
+        uint32_t packet_limit;
+        uint32_t flows;
+        uint32_t quantum;
+        uint32_t memory_limit;
+        usec_t target_usec;
+        usec_t interval_usec;
+        usec_t ce_threshold_usec;
+        int ecn;
+} FairQueueingControlledDelay;
+
+DEFINE_QDISC_CAST(FQ_CODEL, FairQueueingControlledDelay);
+extern const QDiscVTable fq_codel_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_controlled_delay_u32);
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_controlled_delay_usec);
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_controlled_delay_bool);
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_controlled_delay_size);
diff --git a/src/network/tc/fq-pie.c b/src/network/tc/fq-pie.c
new file mode 100644
index 0000000..c8b2e7b
--- /dev/null
+++ b/src/network/tc/fq-pie.c
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * 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);
+
+        assert_se(fq_pie = FQ_PIE(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "fq_pie");
+        if (r < 0)
+                return r;
+
+        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 r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        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 = ASSERT_PTR(data);
+        uint32_t val;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        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,
+};
diff --git a/src/network/tc/fq-pie.h b/src/network/tc/fq-pie.h
new file mode 100644
index 0000000..51fb626
--- /dev/null
+++ b/src/network/tc/fq-pie.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * 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);
diff --git a/src/network/tc/fq.c b/src/network/tc/fq.c
new file mode 100644
index 0000000..74785c9
--- /dev/null
+++ b/src/network/tc/fq.c
@@ -0,0 +1,409 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "fq.h"
+#include "logarithm.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+#include "strv.h"
+
+static int fair_queueing_init(QDisc *qdisc) {
+        FairQueueing *fq;
+
+        assert(qdisc);
+
+        fq = FQ(qdisc);
+
+        fq->pacing = -1;
+        fq->ce_threshold_usec = USEC_INFINITY;
+
+        return 0;
+}
+
+static int fair_queueing_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        FairQueueing *fq;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(fq = FQ(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "fq");
+        if (r < 0)
+                return r;
+
+        if (fq->packet_limit > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_PLIMIT, fq->packet_limit);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->flow_limit > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_FLOW_PLIMIT, fq->flow_limit);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->quantum > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_QUANTUM, fq->quantum);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->initial_quantum > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_INITIAL_QUANTUM, fq->initial_quantum);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->pacing >= 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_RATE_ENABLE, fq->pacing);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->max_rate > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_FLOW_MAX_RATE, fq->max_rate);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->buckets > 0) {
+                uint32_t l;
+
+                l = log2u(fq->buckets);
+                r = sd_netlink_message_append_u32(req, TCA_FQ_BUCKETS_LOG, l);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->orphan_mask > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_ORPHAN_MASK, fq->orphan_mask);
+                if (r < 0)
+                        return r;
+        }
+
+        if (fq->ce_threshold_usec != USEC_INFINITY) {
+                r = sd_netlink_message_append_u32(req, TCA_FQ_CE_THRESHOLD, fq->ce_threshold_usec);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_fair_queueing_u32(
+                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;
+        FairQueueing *fq;
+        Network *network = ASSERT_PTR(data);
+        uint32_t *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fq = FQ(qdisc);
+
+        if (streq(lvalue, "PacketLimit"))
+                p = &fq->packet_limit;
+        else if (streq(lvalue, "FlowLimit"))
+                p = &fq->flow_limit;
+        else if (streq(lvalue, "Buckets"))
+                p = &fq->buckets;
+        else if (streq(lvalue, "OrphanMask"))
+                p = &fq->orphan_mask;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *p = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, p);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_fair_queueing_size(
+                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;
+        FairQueueing *fq;
+        Network *network = ASSERT_PTR(data);
+        uint64_t sz;
+        uint32_t *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fq = FQ(qdisc);
+
+        if (STR_IN_SET(lvalue, "QuantumBytes", "Quantum"))
+                p = &fq->quantum;
+        else if (STR_IN_SET(lvalue, "InitialQuantumBytes", "InitialQuantum"))
+                p = &fq->initial_quantum;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *p = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &sz);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (sz > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified '%s=' is too large, ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        *p = sz;
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_fair_queueing_bool(
+                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;
+        FairQueueing *fq;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fq = FQ(qdisc);
+
+        r = parse_tristate(rvalue, &fq->pacing);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        fq->pacing = r;
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_fair_queueing_usec(
+                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;
+        FairQueueing *fq;
+        Network *network = ASSERT_PTR(data);
+        usec_t sec;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fq = FQ(qdisc);
+
+        if (isempty(rvalue)) {
+                fq->ce_threshold_usec = USEC_INFINITY;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = parse_sec(rvalue, &sec);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (sec > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified '%s=' is too large, ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        fq->ce_threshold_usec = sec;
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_fair_queueing_max_rate(
+                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;
+        FairQueueing *fq;
+        Network *network = ASSERT_PTR(data);
+        uint64_t sz;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_FQ, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        fq = FQ(qdisc);
+
+        if (isempty(rvalue)) {
+                fq->max_rate = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1000, &sz);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (sz / 8 > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified '%s=' is too large, ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        fq->max_rate = sz / 8;
+        qdisc = NULL;
+
+        return 0;
+}
+
+const QDiscVTable fq_vtable = {
+        .init = fair_queueing_init,
+        .object_size = sizeof(FairQueueing),
+        .tca_kind = "fq",
+        .fill_message = fair_queueing_fill_message,
+};
diff --git a/src/network/tc/fq.h b/src/network/tc/fq.h
new file mode 100644
index 0000000..77469c4
--- /dev/null
+++ b/src/network/tc/fq.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct FairQueueing {
+        QDisc meta;
+
+        uint32_t packet_limit;
+        uint32_t flow_limit;
+        uint32_t quantum;
+        uint32_t initial_quantum;
+        uint32_t max_rate;
+        uint32_t buckets;
+        uint32_t orphan_mask;
+        int pacing;
+        usec_t ce_threshold_usec;
+} FairQueueing;
+
+DEFINE_QDISC_CAST(FQ, FairQueueing);
+extern const QDiscVTable fq_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_u32);
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_size);
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_bool);
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_usec);
+CONFIG_PARSER_PROTOTYPE(config_parse_fair_queueing_max_rate);
diff --git a/src/network/tc/gred.c b/src/network/tc/gred.c
new file mode 100644
index 0000000..2efb02c
--- /dev/null
+++ b/src/network/tc/gred.c
@@ -0,0 +1,185 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "string-util.h"
+
+static int generic_random_early_detection_init(QDisc *qdisc) {
+        GenericRandomEarlyDetection *gred;
+
+        assert(qdisc);
+
+        gred = GRED(qdisc);
+
+        gred->grio = -1;
+
+        return 0;
+}
+
+static int generic_random_early_detection_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        GenericRandomEarlyDetection *gred;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(gred = GRED(qdisc));
+
+        const struct tc_gred_sopt opt = {
+                .DPs = gred->virtual_queues,
+                .def_DP = gred->default_virtual_queue,
+                .grio = gred->grio,
+        };
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "gred");
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_data(req, TCA_GRED_DPS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int generic_random_early_detection_verify(QDisc *qdisc) {
+        GenericRandomEarlyDetection *gred = GRED(qdisc);
+
+        if (gred->default_virtual_queue >= gred->virtual_queues)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: DefaultVirtualQueue= must be less than VirtualQueues=. "
+                                         "Ignoring [GenericRandomEarlyDetection] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        return 0;
+}
+
+int config_parse_generic_random_early_detection_u32(
+                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;
+        GenericRandomEarlyDetection *gred;
+        Network *network = ASSERT_PTR(data);
+        uint32_t *p;
+        uint32_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_GRED, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        gred = GRED(qdisc);
+
+        if (streq(lvalue, "VirtualQueues"))
+                p = &gred->virtual_queues;
+        else if (streq(lvalue, "DefaultVirtualQueue"))
+                p = &gred->default_virtual_queue;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *p = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (v > MAX_DPs)
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+
+        *p = v;
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+int config_parse_generic_random_early_detection_bool(
+                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;
+        GenericRandomEarlyDetection *gred;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_GRED, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        gred = GRED(qdisc);
+
+        r = parse_tristate(rvalue, &gred->grio);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+const QDiscVTable gred_vtable = {
+        .object_size = sizeof(GenericRandomEarlyDetection),
+        .tca_kind = "gred",
+        .init = generic_random_early_detection_init,
+        .fill_message = generic_random_early_detection_fill_message,
+        .verify = generic_random_early_detection_verify,
+};
diff --git a/src/network/tc/gred.h b/src/network/tc/gred.h
new file mode 100644
index 0000000..c084ff1
--- /dev/null
+++ b/src/network/tc/gred.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct GenericRandomEarlyDetection {
+        QDisc meta;
+
+        uint32_t virtual_queues;
+        uint32_t default_virtual_queue;
+        int grio;
+} GenericRandomEarlyDetection;
+
+DEFINE_QDISC_CAST(GRED, GenericRandomEarlyDetection);
+extern const QDiscVTable gred_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_generic_random_early_detection_u32);
+CONFIG_PARSER_PROTOTYPE(config_parse_generic_random_early_detection_bool);
diff --git a/src/network/tc/hhf.c b/src/network/tc/hhf.c
new file mode 100644
index 0000000..d44522f
--- /dev/null
+++ b/src/network/tc/hhf.c
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "hhf.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+static int heavy_hitter_filter_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        HeavyHitterFilter *hhf;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(hhf = HHF(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "hhf");
+        if (r < 0)
+                return r;
+
+        if (hhf->packet_limit > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_HHF_BACKLOG_LIMIT, hhf->packet_limit);
+                if (r < 0)
+                        return r;
+        }
+
+       r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_heavy_hitter_filter_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;
+        HeavyHitterFilter *hhf;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_HHF, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        hhf = HHF(qdisc);
+
+        if (isempty(rvalue)) {
+                hhf->packet_limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &hhf->packet_limit);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+const QDiscVTable hhf_vtable = {
+        .object_size = sizeof(HeavyHitterFilter),
+        .tca_kind = "hhf",
+        .fill_message = heavy_hitter_filter_fill_message,
+};
diff --git a/src/network/tc/hhf.h b/src/network/tc/hhf.h
new file mode 100644
index 0000000..04caaa8
--- /dev/null
+++ b/src/network/tc/hhf.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct HeavyHitterFilter {
+        QDisc meta;
+
+        uint32_t packet_limit;
+} HeavyHitterFilter;
+
+DEFINE_QDISC_CAST(HHF, HeavyHitterFilter);
+extern const QDiscVTable hhf_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_heavy_hitter_filter_packet_limit);
diff --git a/src/network/tc/htb.c b/src/network/tc/htb.c
new file mode 100644
index 0000000..eb2c8cf
--- /dev/null
+++ b/src/network/tc/htb.c
@@ -0,0 +1,487 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "networkd-link.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "htb.h"
+#include "string-util.h"
+#include "tc-util.h"
+
+#define HTB_DEFAULT_RATE_TO_QUANTUM  10
+#define HTB_DEFAULT_MTU              1600  /* Ethernet packet length */
+
+static int hierarchy_token_bucket_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        HierarchyTokenBucket *htb;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(htb = HTB(qdisc));
+
+        struct tc_htb_glob opt = {
+                .version = 3,
+                .rate2quantum = htb->rate_to_quantum,
+                .defcls = htb->default_class,
+        };
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "htb");
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_data(req, TCA_HTB_INIT, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+        return 0;
+}
+
+int config_parse_hierarchy_token_bucket_default_class(
+                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;
+        HierarchyTokenBucket *htb;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_HTB, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        htb = HTB(qdisc);
+
+        if (isempty(rvalue)) {
+                htb->default_class = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32_full(rvalue, 16, &htb->default_class);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_hierarchy_token_bucket_u32(
+                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;
+        HierarchyTokenBucket *htb;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_HTB, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        htb = HTB(qdisc);
+
+        if (isempty(rvalue)) {
+                htb->rate_to_quantum = HTB_DEFAULT_RATE_TO_QUANTUM;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &htb->rate_to_quantum);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+static int hierarchy_token_bucket_init(QDisc *qdisc) {
+        HierarchyTokenBucket *htb;
+
+        assert(qdisc);
+
+        htb = HTB(qdisc);
+
+        htb->rate_to_quantum = HTB_DEFAULT_RATE_TO_QUANTUM;
+
+        return 0;
+}
+
+const QDiscVTable htb_vtable = {
+        .object_size = sizeof(HierarchyTokenBucket),
+        .tca_kind = "htb",
+        .fill_message = hierarchy_token_bucket_fill_message,
+        .init = hierarchy_token_bucket_init,
+};
+
+static int hierarchy_token_bucket_class_fill_message(Link *link, TClass *tclass, sd_netlink_message *req) {
+        HierarchyTokenBucketClass *htb;
+        uint32_t rtab[256], ctab[256];
+        int r;
+
+        assert(link);
+        assert(tclass);
+        assert(req);
+
+        assert_se(htb = TCLASS_TO_HTB(tclass));
+
+        struct tc_htb_opt opt = {
+                .prio = htb->priority,
+                .quantum = htb->quantum,
+                .rate.rate = (htb->rate >= (1ULL << 32)) ? ~0U : htb->rate,
+                .ceil.rate = (htb->ceil_rate >= (1ULL << 32)) ? ~0U : htb->ceil_rate,
+                .rate.overhead = htb->overhead,
+                .ceil.overhead = htb->overhead,
+        };
+
+        r = tc_transmit_time(htb->rate, htb->buffer, &opt.buffer);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to calculate buffer size: %m");
+
+        r = tc_transmit_time(htb->ceil_rate, htb->ceil_buffer, &opt.cbuffer);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to calculate ceil buffer size: %m");
+
+        r = tc_fill_ratespec_and_table(&opt.rate, rtab, htb->mtu);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to calculate rate table: %m");
+
+        r = tc_fill_ratespec_and_table(&opt.ceil, ctab, htb->mtu);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to calculate ceil rate table: %m");
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "htb");
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_data(req, TCA_HTB_PARMS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        if (htb->rate >= (1ULL << 32)) {
+                r = sd_netlink_message_append_u64(req, TCA_HTB_RATE64, htb->rate);
+                if (r < 0)
+                        return r;
+        }
+
+        if (htb->ceil_rate >= (1ULL << 32)) {
+                r = sd_netlink_message_append_u64(req, TCA_HTB_CEIL64, htb->ceil_rate);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_data(req, TCA_HTB_RTAB, rtab, sizeof(rtab));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_data(req, TCA_HTB_CTAB, ctab, sizeof(ctab));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_hierarchy_token_bucket_class_u32(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        HierarchyTokenBucketClass *htb;
+        Network *network = ASSERT_PTR(data);
+        uint32_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(TCLASS_KIND_HTB, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        htb = TCLASS_TO_HTB(tclass);
+
+        if (isempty(rvalue)) {
+                htb->priority = 0;
+                tclass = NULL;
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        htb->priority = v;
+        tclass = NULL;
+
+        return 0;
+}
+
+int config_parse_hierarchy_token_bucket_class_size(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        HierarchyTokenBucketClass *htb;
+        Network *network = ASSERT_PTR(data);
+        uint64_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(TCLASS_KIND_HTB, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        htb = TCLASS_TO_HTB(tclass);
+
+        if (isempty(rvalue)) {
+                if (streq(lvalue, "QuantumBytes"))
+                        htb->quantum = 0;
+                else if (streq(lvalue, "MTUBytes"))
+                        htb->mtu = HTB_DEFAULT_MTU;
+                else if (streq(lvalue, "OverheadBytes"))
+                        htb->overhead = 0;
+                else if (streq(lvalue, "BufferBytes"))
+                        htb->buffer = 0;
+                else if (streq(lvalue, "CeilBufferBytes"))
+                        htb->ceil_buffer = 0;
+                else
+                        assert_not_reached();
+
+                tclass = NULL;
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if ((streq(lvalue, "OverheadBytes") && v > UINT16_MAX) || v > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (streq(lvalue, "QuantumBytes"))
+                htb->quantum = v;
+        else if (streq(lvalue, "OverheadBytes"))
+                htb->overhead = v;
+        else if (streq(lvalue, "MTUBytes"))
+                htb->mtu = v;
+        else if (streq(lvalue, "BufferBytes"))
+                htb->buffer = v;
+        else if (streq(lvalue, "CeilBufferBytes"))
+                htb->ceil_buffer = v;
+        else
+                assert_not_reached();
+
+        tclass = NULL;
+
+        return 0;
+}
+
+int config_parse_hierarchy_token_bucket_class_rate(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        HierarchyTokenBucketClass *htb;
+        Network *network = ASSERT_PTR(data);
+        uint64_t *v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(TCLASS_KIND_HTB, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        htb = TCLASS_TO_HTB(tclass);
+        if (streq(lvalue, "Rate"))
+                v = &htb->rate;
+        else if (streq(lvalue, "CeilRate"))
+                v = &htb->ceil_rate;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *v = 0;
+
+                tclass = NULL;
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1000, v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        *v /= 8;
+        tclass = NULL;
+
+        return 0;
+}
+
+static int hierarchy_token_bucket_class_init(TClass *tclass) {
+        HierarchyTokenBucketClass *htb;
+
+        assert(tclass);
+
+        htb = TCLASS_TO_HTB(tclass);
+
+        htb->mtu = HTB_DEFAULT_MTU;
+
+        return 0;
+}
+
+static int hierarchy_token_bucket_class_verify(TClass *tclass) {
+        HierarchyTokenBucketClass *htb;
+        uint32_t hz;
+        int r;
+
+        assert(tclass);
+
+        htb = TCLASS_TO_HTB(tclass);
+
+        if (htb->rate == 0)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: Rate= is mandatory. "
+                                         "Ignoring [HierarchyTokenBucketClass] section from line %u.",
+                                         tclass->section->filename, tclass->section->line);
+
+        /* if CeilRate= setting is missing, use the same as Rate= */
+        if (htb->ceil_rate == 0)
+                htb->ceil_rate = htb->rate;
+
+        r = tc_init(NULL, &hz);
+        if (r < 0)
+                return log_error_errno(r, "Failed to read /proc/net/psched: %m");
+
+        if (htb->buffer == 0)
+                htb->buffer = htb->rate / hz + htb->mtu;
+        if (htb->ceil_buffer == 0)
+                htb->ceil_buffer = htb->ceil_rate / hz + htb->mtu;
+
+        return 0;
+}
+
+const TClassVTable htb_tclass_vtable = {
+        .object_size = sizeof(HierarchyTokenBucketClass),
+        .tca_kind = "htb",
+        .fill_message = hierarchy_token_bucket_class_fill_message,
+        .init = hierarchy_token_bucket_class_init,
+        .verify = hierarchy_token_bucket_class_verify,
+};
diff --git a/src/network/tc/htb.h b/src/network/tc/htb.h
new file mode 100644
index 0000000..55644db
--- /dev/null
+++ b/src/network/tc/htb.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+#include "tclass.h"
+
+typedef struct HierarchyTokenBucket {
+        QDisc meta;
+
+        uint32_t default_class;
+        uint32_t rate_to_quantum;
+} HierarchyTokenBucket;
+
+DEFINE_QDISC_CAST(HTB, HierarchyTokenBucket);
+extern const QDiscVTable htb_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_hierarchy_token_bucket_default_class);
+CONFIG_PARSER_PROTOTYPE(config_parse_hierarchy_token_bucket_u32);
+
+typedef struct HierarchyTokenBucketClass {
+        TClass meta;
+
+        uint32_t priority;
+        uint32_t quantum;
+        uint32_t mtu;
+        uint16_t overhead;
+        uint64_t rate;
+        uint32_t buffer;
+        uint64_t ceil_rate;
+        uint32_t ceil_buffer;
+} HierarchyTokenBucketClass;
+
+DEFINE_TCLASS_CAST(HTB, HierarchyTokenBucketClass);
+extern const TClassVTable htb_tclass_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_hierarchy_token_bucket_class_u32);
+CONFIG_PARSER_PROTOTYPE(config_parse_hierarchy_token_bucket_class_size);
+CONFIG_PARSER_PROTOTYPE(config_parse_hierarchy_token_bucket_class_rate);
diff --git a/src/network/tc/netem.c b/src/network/tc/netem.c
new file mode 100644
index 0000000..6a63221
--- /dev/null
+++ b/src/network/tc/netem.c
@@ -0,0 +1,227 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netem.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "strv.h"
+#include "tc-util.h"
+
+static int network_emulator_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        NetworkEmulator *ne;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(ne = NETEM(qdisc));
+
+        struct tc_netem_qopt opt = {
+                .limit = ne->limit > 0 ? ne->limit : 1000,
+                .loss = ne->loss,
+                .duplicate = ne->duplicate,
+        };
+
+        if (ne->delay != USEC_INFINITY) {
+                r = tc_time_to_tick(ne->delay, &opt.latency);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Failed to calculate latency in TCA_OPTION: %m");
+        }
+
+        if (ne->jitter != USEC_INFINITY) {
+                r = tc_time_to_tick(ne->jitter, &opt.jitter);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Failed to calculate jitter in TCA_OPTION: %m");
+        }
+
+        r = sd_netlink_message_append_data(req, TCA_OPTIONS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_network_emulator_delay(
+                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;
+        Network *network = ASSERT_PTR(data);
+        NetworkEmulator *ne;
+        usec_t u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        ne = NETEM(qdisc);
+
+        if (isempty(rvalue)) {
+                if (STR_IN_SET(lvalue, "DelaySec", "NetworkEmulatorDelaySec"))
+                        ne->delay = USEC_INFINITY;
+                else if (STR_IN_SET(lvalue, "DelayJitterSec", "NetworkEmulatorDelayJitterSec"))
+                        ne->jitter = USEC_INFINITY;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_sec(rvalue, &u);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (STR_IN_SET(lvalue, "DelaySec", "NetworkEmulatorDelaySec"))
+                ne->delay = u;
+        else if (STR_IN_SET(lvalue, "DelayJitterSec", "NetworkEmulatorDelayJitterSec"))
+                ne->jitter = u;
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_network_emulator_rate(
+                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;
+        Network *network = ASSERT_PTR(data);
+        NetworkEmulator *ne;
+        uint32_t rate;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        ne = NETEM(qdisc);
+
+        if (isempty(rvalue)) {
+                if (STR_IN_SET(lvalue, "LossRate", "NetworkEmulatorLossRate"))
+                        ne->loss = 0;
+                else if (STR_IN_SET(lvalue, "DuplicateRate", "NetworkEmulatorDuplicateRate"))
+                        ne->duplicate = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_tc_percent(rvalue, &rate);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (STR_IN_SET(lvalue, "LossRate", "NetworkEmulatorLossRate"))
+                ne->loss = rate;
+        else if (STR_IN_SET(lvalue, "DuplicateRate", "NetworkEmulatorDuplicateRate"))
+                ne->duplicate = rate;
+
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+int config_parse_network_emulator_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;
+        Network *network = ASSERT_PTR(data);
+        NetworkEmulator *ne;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        ne = NETEM(qdisc);
+
+        if (isempty(rvalue)) {
+                ne->limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou(rvalue, &ne->limit);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+const QDiscVTable netem_vtable = {
+        .object_size = sizeof(NetworkEmulator),
+        .tca_kind = "netem",
+        .fill_message = network_emulator_fill_message,
+};
diff --git a/src/network/tc/netem.h b/src/network/tc/netem.h
new file mode 100644
index 0000000..d58d5ac
--- /dev/null
+++ b/src/network/tc/netem.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+#include "time-util.h"
+
+typedef struct NetworkEmulator {
+        QDisc meta;
+
+        usec_t delay;
+        usec_t jitter;
+
+        uint32_t limit;
+        uint32_t loss;
+        uint32_t duplicate;
+} NetworkEmulator;
+
+DEFINE_QDISC_CAST(NETEM, NetworkEmulator);
+extern const QDiscVTable netem_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_network_emulator_delay);
+CONFIG_PARSER_PROTOTYPE(config_parse_network_emulator_rate);
+CONFIG_PARSER_PROTOTYPE(config_parse_network_emulator_packet_limit);
diff --git a/src/network/tc/pie.c b/src/network/tc/pie.c
new file mode 100644
index 0000000..c9b171b
--- /dev/null
+++ b/src/network/tc/pie.c
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * 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) {
+        ProportionalIntegralControllerEnhanced *pie;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(pie = PIE(qdisc));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "pie");
+        if (r < 0)
+                return r;
+
+        if (pie->packet_limit > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_PIE_LIMIT, pie->packet_limit);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        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;
+        ProportionalIntegralControllerEnhanced *pie;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_PIE, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        pie = PIE(qdisc);
+
+        if (isempty(rvalue)) {
+                pie->packet_limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &pie->packet_limit);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+const QDiscVTable pie_vtable = {
+        .object_size = sizeof(ProportionalIntegralControllerEnhanced),
+        .tca_kind = "pie",
+        .fill_message = pie_fill_message,
+};
diff --git a/src/network/tc/pie.h b/src/network/tc/pie.h
new file mode 100644
index 0000000..40a114e
--- /dev/null
+++ b/src/network/tc/pie.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct ProportionalIntegralControllerEnhanced {
+        QDisc meta;
+
+        uint32_t packet_limit;
+} ProportionalIntegralControllerEnhanced;
+
+DEFINE_QDISC_CAST(PIE, ProportionalIntegralControllerEnhanced);
+extern const QDiscVTable pie_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_pie_packet_limit);
diff --git a/src/network/tc/qdisc.c b/src/network/tc/qdisc.c
new file mode 100644
index 0000000..f20f410
--- /dev/null
+++ b/src/network/tc/qdisc.c
@@ -0,0 +1,715 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "in-addr-util.h"
+#include "netlink-util.h"
+#include "networkd-link.h"
+#include "networkd-manager.h"
+#include "networkd-network.h"
+#include "networkd-queue.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "set.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tc-util.h"
+
+const QDiscVTable * const qdisc_vtable[_QDISC_KIND_MAX] = {
+        [QDISC_KIND_BFIFO]           = &bfifo_vtable,
+        [QDISC_KIND_CAKE]            = &cake_vtable,
+        [QDISC_KIND_CODEL]           = &codel_vtable,
+        [QDISC_KIND_DRR]             = &drr_vtable,
+        [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,
+        [QDISC_KIND_NETEM]           = &netem_vtable,
+        [QDISC_KIND_PIE]             = &pie_vtable,
+        [QDISC_KIND_QFQ]             = &qfq_vtable,
+        [QDISC_KIND_PFIFO]           = &pfifo_vtable,
+        [QDISC_KIND_PFIFO_FAST]      = &pfifo_fast_vtable,
+        [QDISC_KIND_PFIFO_HEAD_DROP] = &pfifo_head_drop_vtable,
+        [QDISC_KIND_SFB]             = &sfb_vtable,
+        [QDISC_KIND_SFQ]             = &sfq_vtable,
+        [QDISC_KIND_TBF]             = &tbf_vtable,
+        [QDISC_KIND_TEQL]            = &teql_vtable,
+};
+
+static int qdisc_new(QDiscKind kind, QDisc **ret) {
+        _cleanup_(qdisc_freep) QDisc *qdisc = NULL;
+        int r;
+
+        if (kind == _QDISC_KIND_INVALID) {
+                qdisc = new(QDisc, 1);
+                if (!qdisc)
+                        return -ENOMEM;
+
+                *qdisc = (QDisc) {
+                        .parent = TC_H_ROOT,
+                        .kind = kind,
+                };
+        } else {
+                assert(kind >= 0 && kind < _QDISC_KIND_MAX);
+                qdisc = malloc0(qdisc_vtable[kind]->object_size);
+                if (!qdisc)
+                        return -ENOMEM;
+
+                qdisc->parent = TC_H_ROOT;
+                qdisc->kind = kind;
+
+                if (QDISC_VTABLE(qdisc)->init) {
+                        r = QDISC_VTABLE(qdisc)->init(qdisc);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        *ret = TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int qdisc_new_static(QDiscKind kind, Network *network, const char *filename, unsigned section_line, QDisc **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(qdisc_freep) QDisc *qdisc = NULL;
+        QDisc *existing;
+        int r;
+
+        assert(network);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        existing = hashmap_get(network->qdiscs_by_section, n);
+        if (existing) {
+                if (existing->kind != _QDISC_KIND_INVALID &&
+                    kind != _QDISC_KIND_INVALID &&
+                    existing->kind != kind)
+                        return -EINVAL;
+
+                if (existing->kind == kind || kind == _QDISC_KIND_INVALID) {
+                        *ret = existing;
+                        return 0;
+                }
+        }
+
+        r = qdisc_new(kind, &qdisc);
+        if (r < 0)
+                return r;
+
+        if (existing) {
+                qdisc->handle = existing->handle;
+                qdisc->parent = existing->parent;
+                qdisc->tca_kind = TAKE_PTR(existing->tca_kind);
+
+                qdisc_free(existing);
+        }
+
+        qdisc->network = network;
+        qdisc->section = TAKE_PTR(n);
+        qdisc->source = NETWORK_CONFIG_SOURCE_STATIC;
+
+        r = hashmap_ensure_put(&network->qdiscs_by_section, &config_section_hash_ops, qdisc->section, qdisc);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(qdisc);
+        return 0;
+}
+
+QDisc* qdisc_free(QDisc *qdisc) {
+        if (!qdisc)
+                return NULL;
+
+        if (qdisc->network && qdisc->section)
+                hashmap_remove(qdisc->network->qdiscs_by_section, qdisc->section);
+
+        config_section_free(qdisc->section);
+
+        if (qdisc->link)
+                set_remove(qdisc->link->qdiscs, qdisc);
+
+        free(qdisc->tca_kind);
+        return mfree(qdisc);
+}
+
+static const char *qdisc_get_tca_kind(const QDisc *qdisc) {
+        assert(qdisc);
+
+        return (QDISC_VTABLE(qdisc) && QDISC_VTABLE(qdisc)->tca_kind) ?
+                QDISC_VTABLE(qdisc)->tca_kind : qdisc->tca_kind;
+}
+
+static void qdisc_hash_func(const QDisc *qdisc, struct siphash *state) {
+        assert(qdisc);
+        assert(state);
+
+        siphash24_compress(&qdisc->handle, sizeof(qdisc->handle), state);
+        siphash24_compress(&qdisc->parent, sizeof(qdisc->parent), state);
+        siphash24_compress_string(qdisc_get_tca_kind(qdisc), state);
+}
+
+static int qdisc_compare_func(const QDisc *a, const QDisc *b) {
+        int r;
+
+        assert(a);
+        assert(b);
+
+        r = CMP(a->handle, b->handle);
+        if (r != 0)
+                return r;
+
+        r = CMP(a->parent, b->parent);
+        if (r != 0)
+                return r;
+
+        return strcmp_ptr(qdisc_get_tca_kind(a), qdisc_get_tca_kind(b));
+}
+
+DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
+        qdisc_hash_ops,
+        QDisc,
+        qdisc_hash_func,
+        qdisc_compare_func,
+        qdisc_free);
+
+static int qdisc_get(Link *link, const QDisc *in, QDisc **ret) {
+        QDisc *existing;
+
+        assert(link);
+        assert(in);
+
+        existing = set_get(link->qdiscs, in);
+        if (!existing)
+                return -ENOENT;
+
+        if (ret)
+                *ret = existing;
+        return 0;
+}
+
+static int qdisc_add(Link *link, QDisc *qdisc) {
+        int r;
+
+        assert(link);
+        assert(qdisc);
+
+        r = set_ensure_put(&link->qdiscs, &qdisc_hash_ops, qdisc);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return -EEXIST;
+
+        qdisc->link = link;
+        return 0;
+}
+
+static int qdisc_dup(const QDisc *src, QDisc **ret) {
+        _cleanup_(qdisc_freep) QDisc *dst = NULL;
+
+        assert(src);
+        assert(ret);
+
+        if (QDISC_VTABLE(src))
+                dst = memdup(src, QDISC_VTABLE(src)->object_size);
+        else
+                dst = newdup(QDisc, src, 1);
+        if (!dst)
+                return -ENOMEM;
+
+        /* clear all pointers */
+        dst->network = NULL;
+        dst->section = NULL;
+        dst->link = NULL;
+        dst->tca_kind = NULL;
+
+        if (src->tca_kind) {
+                dst->tca_kind = strdup(src->tca_kind);
+                if (!dst->tca_kind)
+                        return -ENOMEM;
+        }
+
+        *ret = TAKE_PTR(dst);
+        return 0;
+}
+
+static void log_qdisc_debug(QDisc *qdisc, Link *link, const char *str) {
+        _cleanup_free_ char *state = NULL;
+
+        assert(qdisc);
+        assert(str);
+
+        if (!DEBUG_LOGGING)
+                return;
+
+        (void) network_config_state_to_string_alloc(qdisc->state, &state);
+
+        log_link_debug(link, "%s %s QDisc (%s): handle=%"PRIx32":%"PRIx32", parent=%"PRIx32":%"PRIx32", kind=%s",
+                       str, strna(network_config_source_to_string(qdisc->source)), strna(state),
+                       TC_H_MAJ(qdisc->handle) >> 16, TC_H_MIN(qdisc->handle),
+                       TC_H_MAJ(qdisc->parent) >> 16, TC_H_MIN(qdisc->parent),
+                       strna(qdisc_get_tca_kind(qdisc)));
+}
+
+int link_find_qdisc(Link *link, uint32_t handle, const char *kind, QDisc **ret) {
+        QDisc *qdisc;
+
+        assert(link);
+
+        SET_FOREACH(qdisc, link->qdiscs) {
+                if (qdisc->handle != handle)
+                        continue;
+
+                if (!qdisc_exists(qdisc))
+                        continue;
+
+                if (kind && !streq_ptr(kind, qdisc_get_tca_kind(qdisc)))
+                        continue;
+
+                if (ret)
+                        *ret = qdisc;
+                return 0;
+        }
+
+        return -ENOENT;
+}
+
+QDisc* qdisc_drop(QDisc *qdisc) {
+        TClass *tclass;
+        Link *link;
+
+        assert(qdisc);
+
+        link = ASSERT_PTR(qdisc->link);
+
+        /* also drop all child classes assigned to the qdisc. */
+        SET_FOREACH(tclass, link->tclasses) {
+                if (TC_H_MAJ(tclass->classid) != qdisc->handle)
+                        continue;
+
+                tclass_drop(tclass);
+        }
+
+        qdisc_enter_removed(qdisc);
+
+        if (qdisc->state == 0) {
+                log_qdisc_debug(qdisc, link, "Forgetting");
+                qdisc = qdisc_free(qdisc);
+        } else
+                log_qdisc_debug(qdisc, link, "Removed");
+
+        return qdisc;
+}
+
+static int qdisc_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, QDisc *qdisc) {
+        int r;
+
+        assert(m);
+        assert(link);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_message_error_errno(link, m, r, "Could not set QDisc");
+                link_enter_failed(link);
+                return 1;
+        }
+
+        if (link->tc_messages == 0) {
+                log_link_debug(link, "Traffic control configured");
+                link->tc_configured = true;
+                link_check_ready(link);
+        }
+
+        return 1;
+}
+
+static int qdisc_configure(QDisc *qdisc, Link *link, Request *req) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(qdisc);
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+        assert(link->ifindex > 0);
+        assert(req);
+
+        log_qdisc_debug(qdisc, link, "Configuring");
+
+        r = sd_rtnl_message_new_traffic_control(link->manager->rtnl, &m, RTM_NEWQDISC,
+                                                link->ifindex, qdisc->handle, qdisc->parent);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_string(m, TCA_KIND, qdisc_get_tca_kind(qdisc));
+        if (r < 0)
+                return r;
+
+        if (QDISC_VTABLE(qdisc) && QDISC_VTABLE(qdisc)->fill_message) {
+                r = QDISC_VTABLE(qdisc)->fill_message(link, qdisc, m);
+                if (r < 0)
+                        return r;
+        }
+
+        return request_call_netlink_async(link->manager->rtnl, m, req);
+}
+
+static bool qdisc_is_ready_to_configure(QDisc *qdisc, Link *link) {
+        assert(qdisc);
+        assert(link);
+
+        if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
+                return false;
+
+        /* TC_H_CLSACT == TC_H_INGRESS */
+        if (!IN_SET(qdisc->parent, TC_H_ROOT, TC_H_CLSACT)) {
+                if (TC_H_MIN(qdisc->parent) == 0) {
+                        if (link_find_qdisc(link, qdisc->parent, NULL, NULL) < 0)
+                                return false;
+                } else {
+                        if (link_find_tclass(link, qdisc->parent, NULL) < 0)
+                                return false;
+                }
+        }
+
+        if (QDISC_VTABLE(qdisc) &&
+            QDISC_VTABLE(qdisc)->is_ready &&
+            QDISC_VTABLE(qdisc)->is_ready(qdisc, link) <= 0)
+                return false;
+
+        return true;
+}
+
+static int qdisc_process_request(Request *req, Link *link, QDisc *qdisc) {
+        int r;
+
+        assert(req);
+        assert(link);
+        assert(qdisc);
+
+        if (!qdisc_is_ready_to_configure(qdisc, link))
+                return 0;
+
+        r = qdisc_configure(qdisc, link, req);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "Failed to configure QDisc: %m");
+
+        qdisc_enter_configuring(qdisc);
+        return 1;
+}
+
+int link_request_qdisc(Link *link, QDisc *qdisc) {
+        QDisc *existing;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+
+        if (qdisc_get(link, qdisc, &existing) < 0) {
+                _cleanup_(qdisc_freep) QDisc *tmp = NULL;
+
+                r = qdisc_dup(qdisc, &tmp);
+                if (r < 0)
+                        return log_oom();
+
+                r = qdisc_add(link, tmp);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "Failed to store QDisc: %m");
+
+                existing = TAKE_PTR(tmp);
+        } else
+                existing->source = qdisc->source;
+
+        log_qdisc_debug(existing, link, "Requesting");
+        r = link_queue_request_safe(link, REQUEST_TYPE_TC_QDISC,
+                                    existing, NULL,
+                                    qdisc_hash_func,
+                                    qdisc_compare_func,
+                                    qdisc_process_request,
+                                    &link->tc_messages,
+                                    qdisc_handler,
+                                    NULL);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "Failed to request QDisc: %m");
+        if (r == 0)
+                return 0;
+
+        qdisc_enter_requesting(existing);
+        return 1;
+}
+
+int manager_rtnl_process_qdisc(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
+        _cleanup_(qdisc_freep) QDisc *tmp = NULL;
+        QDisc *qdisc = NULL;
+        Link *link;
+        uint16_t type;
+        int ifindex, r;
+
+        assert(rtnl);
+        assert(message);
+        assert(m);
+
+        if (sd_netlink_message_is_error(message)) {
+                r = sd_netlink_message_get_errno(message);
+                if (r < 0)
+                        log_message_warning_errno(message, r, "rtnl: failed to receive QDisc message, ignoring");
+
+                return 0;
+        }
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
+                return 0;
+        } else if (!IN_SET(type, RTM_NEWQDISC, RTM_DELQDISC)) {
+                log_warning("rtnl: received unexpected message type %u when processing QDisc, ignoring.", type);
+                return 0;
+        }
+
+        r = sd_rtnl_message_traffic_control_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
+                return 0;
+        } else if (ifindex <= 0) {
+                log_warning("rtnl: received QDisc message with invalid ifindex %d, ignoring.", ifindex);
+                return 0;
+        }
+
+        if (link_get_by_index(m, ifindex, &link) < 0) {
+                if (!m->enumerating)
+                        log_warning("rtnl: received QDisc for link '%d' we don't know about, ignoring.", ifindex);
+                return 0;
+        }
+
+        r = qdisc_new(_QDISC_KIND_INVALID, &tmp);
+        if (r < 0)
+                return log_oom();
+
+        r = sd_rtnl_message_traffic_control_get_handle(message, &tmp->handle);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received QDisc message without handle, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_traffic_control_get_parent(message, &tmp->parent);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received QDisc message without parent, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_netlink_message_read_string_strdup(message, TCA_KIND, &tmp->tca_kind);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received QDisc message without kind, ignoring: %m");
+                return 0;
+        }
+
+        (void) qdisc_get(link, tmp, &qdisc);
+
+        switch (type) {
+        case RTM_NEWQDISC:
+                if (qdisc) {
+                        qdisc_enter_configured(qdisc);
+                        log_qdisc_debug(qdisc, link, "Received remembered");
+                } else {
+                        qdisc_enter_configured(tmp);
+                        log_qdisc_debug(tmp, link, "Received new");
+
+                        r = qdisc_add(link, tmp);
+                        if (r < 0) {
+                                log_link_warning_errno(link, r, "Failed to remember QDisc, ignoring: %m");
+                                return 0;
+                        }
+
+                        qdisc = TAKE_PTR(tmp);
+                }
+
+                if (!m->enumerating) {
+                        /* Some kind of QDisc (e.g. tbf) also create an implicit class under the qdisc, but
+                         * the kernel may not notify about the class. Hence, we need to enumerate classes. */
+                        r = link_enumerate_tclass(link, qdisc->handle);
+                        if (r < 0)
+                                log_link_warning_errno(link, r, "Failed to enumerate TClass, ignoring: %m");
+                }
+
+                break;
+
+        case RTM_DELQDISC:
+                if (qdisc)
+                        qdisc_drop(qdisc);
+                else
+                        log_qdisc_debug(tmp, link, "Kernel removed unknown");
+
+                break;
+
+        default:
+                assert_not_reached();
+        }
+
+        return 1;
+}
+
+static int qdisc_section_verify(QDisc *qdisc, bool *has_root, bool *has_clsact) {
+        int r;
+
+        assert(qdisc);
+        assert(has_root);
+        assert(has_clsact);
+
+        if (section_is_invalid(qdisc->section))
+                return -EINVAL;
+
+        if (QDISC_VTABLE(qdisc) && QDISC_VTABLE(qdisc)->verify) {
+                r = QDISC_VTABLE(qdisc)->verify(qdisc);
+                if (r < 0)
+                        return r;
+        }
+
+        if (qdisc->parent == TC_H_ROOT) {
+                if (*has_root)
+                        return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                                 "%s: More than one root qdisc section is defined. "
+                                                 "Ignoring the qdisc section from line %u.",
+                                                 qdisc->section->filename, qdisc->section->line);
+                *has_root = true;
+        } else if (qdisc->parent == TC_H_CLSACT) { /* TC_H_CLSACT == TC_H_INGRESS */
+                if (*has_clsact)
+                        return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                                 "%s: More than one clsact or ingress qdisc section is defined. "
+                                                 "Ignoring the qdisc section from line %u.",
+                                                 qdisc->section->filename, qdisc->section->line);
+                *has_clsact = true;
+        }
+
+        return 0;
+}
+
+void network_drop_invalid_qdisc(Network *network) {
+        bool has_root = false, has_clsact = false;
+        QDisc *qdisc;
+
+        assert(network);
+
+        HASHMAP_FOREACH(qdisc, network->qdiscs_by_section)
+                if (qdisc_section_verify(qdisc, &has_root, &has_clsact) < 0)
+                        qdisc_free(qdisc);
+}
+
+int config_parse_qdisc_parent(
+                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;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(ltype, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        if (streq(rvalue, "root"))
+                qdisc->parent = TC_H_ROOT;
+        else if (streq(rvalue, "clsact")) {
+                qdisc->parent = TC_H_CLSACT;
+                qdisc->handle = TC_H_MAKE(TC_H_CLSACT, 0);
+        } else if (streq(rvalue, "ingress")) {
+                qdisc->parent = TC_H_INGRESS;
+                qdisc->handle = TC_H_MAKE(TC_H_INGRESS, 0);
+        } else {
+                r = parse_handle(rvalue, &qdisc->parent);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse 'Parent=', ignoring assignment: %s",
+                                   rvalue);
+                        return 0;
+                }
+        }
+
+        if (STR_IN_SET(rvalue, "clsact", "ingress")) {
+                r = free_and_strdup(&qdisc->tca_kind, rvalue);
+                if (r < 0)
+                        return log_oom();
+        } else
+                qdisc->tca_kind = mfree(qdisc->tca_kind);
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_qdisc_handle(
+                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;
+        Network *network = ASSERT_PTR(data);
+        uint16_t n;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(ltype, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        if (isempty(rvalue)) {
+                qdisc->handle = TC_H_UNSPEC;
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou16_full(rvalue, 16, &n);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse 'Handle=', ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        qdisc->handle = (uint32_t) n << 16;
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
diff --git a/src/network/tc/qdisc.h b/src/network/tc/qdisc.h
new file mode 100644
index 0000000..a62b941
--- /dev/null
+++ b/src/network/tc/qdisc.h
@@ -0,0 +1,112 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "networkd-util.h"
+
+typedef struct Link Link;
+typedef struct Manager Manager;
+typedef struct Network Network;
+
+typedef enum QDiscKind {
+        QDISC_KIND_BFIFO,
+        QDISC_KIND_CAKE,
+        QDISC_KIND_CODEL,
+        QDISC_KIND_DRR,
+        QDISC_KIND_ETS,
+        QDISC_KIND_FQ,
+        QDISC_KIND_FQ_CODEL,
+        QDISC_KIND_FQ_PIE,
+        QDISC_KIND_GRED,
+        QDISC_KIND_HHF,
+        QDISC_KIND_HTB,
+        QDISC_KIND_NETEM,
+        QDISC_KIND_PFIFO,
+        QDISC_KIND_PFIFO_FAST,
+        QDISC_KIND_PFIFO_HEAD_DROP,
+        QDISC_KIND_PIE,
+        QDISC_KIND_QFQ,
+        QDISC_KIND_SFB,
+        QDISC_KIND_SFQ,
+        QDISC_KIND_TBF,
+        QDISC_KIND_TEQL,
+        _QDISC_KIND_MAX,
+        _QDISC_KIND_INVALID = -EINVAL,
+} QDiscKind;
+
+typedef struct QDisc {
+        Link *link;
+        Network *network;
+        ConfigSection *section;
+        NetworkConfigSource source;
+        NetworkConfigState state;
+
+        uint32_t handle;
+        uint32_t parent;
+
+        char *tca_kind;
+        QDiscKind kind;
+} QDisc;
+
+typedef struct QDiscVTable {
+        size_t object_size;
+        const char *tca_kind;
+        /* called in qdisc_new() */
+        int (*init)(QDisc *qdisc);
+        int (*fill_message)(Link *link, QDisc *qdisc, sd_netlink_message *m);
+        int (*verify)(QDisc *qdisc);
+        int (*is_ready)(QDisc *qdisc, Link *link);
+} QDiscVTable;
+
+extern const QDiscVTable * const qdisc_vtable[_QDISC_KIND_MAX];
+
+#define QDISC_VTABLE(q) ((q)->kind != _QDISC_KIND_INVALID ? qdisc_vtable[(q)->kind] : NULL)
+
+/* For casting a qdisc into the various qdisc kinds */
+#define DEFINE_QDISC_CAST(UPPERCASE, MixedCase)                           \
+        static inline MixedCase* UPPERCASE(QDisc *q) {                    \
+                if (_unlikely_(!q || q->kind != QDISC_KIND_##UPPERCASE))  \
+                        return NULL;                                      \
+                                                                          \
+                return (MixedCase*) q;                                    \
+        }
+
+DEFINE_NETWORK_CONFIG_STATE_FUNCTIONS(QDisc, qdisc);
+
+QDisc* qdisc_free(QDisc *qdisc);
+int qdisc_new_static(QDiscKind kind, Network *network, const char *filename, unsigned section_line, QDisc **ret);
+
+QDisc* qdisc_drop(QDisc *qdisc);
+
+int link_find_qdisc(Link *link, uint32_t handle, const char *kind, QDisc **qdisc);
+
+int link_request_qdisc(Link *link, QDisc *qdisc);
+
+void network_drop_invalid_qdisc(Network *network);
+
+int manager_rtnl_process_qdisc(sd_netlink *rtnl, sd_netlink_message *message, Manager *m);
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(QDisc, qdisc_free);
+
+CONFIG_PARSER_PROTOTYPE(config_parse_qdisc_parent);
+CONFIG_PARSER_PROTOTYPE(config_parse_qdisc_handle);
+
+#include "cake.h"
+#include "codel.h"
+#include "ets.h"
+#include "fifo.h"
+#include "fq-codel.h"
+#include "fq-pie.h"
+#include "fq.h"
+#include "gred.h"
+#include "hhf.h"
+#include "htb.h"
+#include "pie.h"
+#include "qfq.h"
+#include "netem.h"
+#include "drr.h"
+#include "sfb.h"
+#include "sfq.h"
+#include "tbf.h"
+#include "teql.h"
diff --git a/src/network/tc/qfq.c b/src/network/tc/qfq.c
new file mode 100644
index 0000000..7702e6f
--- /dev/null
+++ b/src/network/tc/qfq.c
@@ -0,0 +1,177 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "parse-util.h"
+#include "qdisc.h"
+#include "qfq.h"
+#include "string-util.h"
+
+#define QFQ_MAX_WEIGHT       (1 << 10)
+#define QFQ_MIN_MAX_PACKET   512
+#define QFQ_MAX_MAX_PACKET   (1 << 16)
+
+const QDiscVTable qfq_vtable = {
+        .object_size = sizeof(QuickFairQueueing),
+        .tca_kind = "qfq",
+};
+
+static int quick_fair_queueing_class_fill_message(Link *link, TClass *tclass, sd_netlink_message *req) {
+        QuickFairQueueingClass *qfq;
+        int r;
+
+        assert(link);
+        assert(tclass);
+        assert(req);
+
+        assert_se(qfq = TCLASS_TO_QFQ(tclass));
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "qfq");
+        if (r < 0)
+                return r;
+
+        if (qfq->weight > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_QFQ_WEIGHT, qfq->weight);
+                if (r < 0)
+                        return r;
+        }
+
+        if (qfq->max_packet > 0) {
+                r = sd_netlink_message_append_u32(req, TCA_QFQ_LMAX, qfq->max_packet);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_quick_fair_queueing_weight(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        QuickFairQueueingClass *qfq;
+        Network *network = ASSERT_PTR(data);
+        uint32_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(TCLASS_KIND_QFQ, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        qfq = TCLASS_TO_QFQ(tclass);
+
+        if (isempty(rvalue)) {
+                qfq->weight = 0;
+                TAKE_PTR(tclass);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (v == 0 || v > QFQ_MAX_WEIGHT) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        qfq->weight = v;
+        TAKE_PTR(tclass);
+
+        return 0;
+}
+
+int config_parse_quick_fair_queueing_max_packet(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        QuickFairQueueingClass *qfq;
+        Network *network = ASSERT_PTR(data);
+        uint64_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(TCLASS_KIND_QFQ, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        qfq = TCLASS_TO_QFQ(tclass);
+
+        if (isempty(rvalue)) {
+                qfq->max_packet = 0;
+                TAKE_PTR(tclass);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (v < QFQ_MIN_MAX_PACKET || v > QFQ_MAX_MAX_PACKET) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        qfq->max_packet = (uint32_t) v;
+        TAKE_PTR(tclass);
+
+        return 0;
+}
+
+const TClassVTable qfq_tclass_vtable = {
+        .object_size = sizeof(QuickFairQueueingClass),
+        .tca_kind = "qfq",
+        .fill_message = quick_fair_queueing_class_fill_message,
+};
diff --git a/src/network/tc/qfq.h b/src/network/tc/qfq.h
new file mode 100644
index 0000000..0f013a9
--- /dev/null
+++ b/src/network/tc/qfq.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct QuickFairQueueing {
+        QDisc meta;
+} QuickFairQueueing;
+
+DEFINE_QDISC_CAST(QFQ, QuickFairQueueing);
+extern const QDiscVTable qfq_vtable;
+
+typedef struct QuickFairQueueingClass {
+        TClass meta;
+
+        uint32_t weight;
+        uint32_t max_packet;
+} QuickFairQueueingClass;
+
+DEFINE_TCLASS_CAST(QFQ, QuickFairQueueingClass);
+extern const TClassVTable qfq_tclass_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_quick_fair_queueing_weight);
+CONFIG_PARSER_PROTOTYPE(config_parse_quick_fair_queueing_max_packet);
diff --git a/src/network/tc/sfb.c b/src/network/tc/sfb.c
new file mode 100644
index 0000000..861c5fe
--- /dev/null
+++ b/src/network/tc/sfb.c
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "sfb.h"
+#include "string-util.h"
+
+static int stochastic_fair_blue_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        StochasticFairBlue *sfb;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(sfb = SFB(qdisc));
+
+        const struct tc_sfb_qopt opt = {
+            .rehash_interval = 600*1000,
+            .warmup_time = 60*1000,
+            .penalty_rate = 10,
+            .penalty_burst = 20,
+            .increment = (SFB_MAX_PROB + 1000) / 2000,
+            .decrement = (SFB_MAX_PROB + 10000) / 20000,
+            .max = 25,
+            .bin_size = 20,
+            .limit = sfb->packet_limit,
+        };
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "sfb");
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_data(req, TCA_SFB_PARMS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_stochastic_fair_blue_u32(
+                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;
+        StochasticFairBlue *sfb;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_SFB, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        sfb = SFB(qdisc);
+
+        if (isempty(rvalue)) {
+                sfb->packet_limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &sfb->packet_limit);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+const QDiscVTable sfb_vtable = {
+        .object_size = sizeof(StochasticFairBlue),
+        .tca_kind = "sfb",
+        .fill_message = stochastic_fair_blue_fill_message,
+};
diff --git a/src/network/tc/sfb.h b/src/network/tc/sfb.h
new file mode 100644
index 0000000..628df35
--- /dev/null
+++ b/src/network/tc/sfb.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct StochasticFairBlue {
+        QDisc meta;
+
+        uint32_t packet_limit;
+} StochasticFairBlue;
+
+DEFINE_QDISC_CAST(SFB, StochasticFairBlue);
+extern const QDiscVTable sfb_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_stochastic_fair_blue_u32);
diff --git a/src/network/tc/sfq.c b/src/network/tc/sfq.c
new file mode 100644
index 0000000..92dbae1
--- /dev/null
+++ b/src/network/tc/sfq.c
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "sfq.h"
+#include "string-util.h"
+
+static int stochastic_fairness_queueing_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        StochasticFairnessQueueing *sfq;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(sfq = SFQ(qdisc));
+
+        const struct tc_sfq_qopt_v1 opt = {
+                .v0.perturb_period = sfq->perturb_period / USEC_PER_SEC,
+        };
+
+        r = sd_netlink_message_append_data(req, TCA_OPTIONS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_stochastic_fairness_queueing_perturb_period(
+                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;
+        StochasticFairnessQueueing *sfq;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_SFQ, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        sfq = SFQ(qdisc);
+
+        if (isempty(rvalue)) {
+                sfq->perturb_period = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_sec(rvalue, &sfq->perturb_period);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+const QDiscVTable sfq_vtable = {
+        .object_size = sizeof(StochasticFairnessQueueing),
+        .tca_kind = "sfq",
+        .fill_message = stochastic_fairness_queueing_fill_message,
+};
diff --git a/src/network/tc/sfq.h b/src/network/tc/sfq.h
new file mode 100644
index 0000000..1626775
--- /dev/null
+++ b/src/network/tc/sfq.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+#include "time-util.h"
+
+typedef struct StochasticFairnessQueueing {
+        QDisc meta;
+
+        usec_t perturb_period;
+} StochasticFairnessQueueing;
+
+DEFINE_QDISC_CAST(SFQ, StochasticFairnessQueueing);
+extern const QDiscVTable sfq_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_stochastic_fairness_queueing_perturb_period);
diff --git a/src/network/tc/tbf.c b/src/network/tc/tbf.c
new file mode 100644
index 0000000..647fc8c
--- /dev/null
+++ b/src/network/tc/tbf.c
@@ -0,0 +1,343 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+#include <math.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netem.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tc-util.h"
+
+static int token_bucket_filter_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        uint32_t rtab[256], ptab[256];
+        TokenBucketFilter *tbf;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        assert_se(tbf = TBF(qdisc));
+
+        struct tc_tbf_qopt opt = {
+                .rate.rate = tbf->rate >= (1ULL << 32) ? ~0U : tbf->rate,
+                .peakrate.rate = tbf->peak_rate >= (1ULL << 32) ? ~0U : tbf->peak_rate,
+                .rate.mpu = tbf->mpu,
+        };
+
+        if (tbf->limit > 0)
+                opt.limit = tbf->limit;
+        else {
+                double lim, lim2;
+
+                lim = tbf->rate * (double) tbf->latency / USEC_PER_SEC + tbf->burst;
+                if (tbf->peak_rate > 0) {
+                        lim2 = tbf->peak_rate * (double) tbf->latency / USEC_PER_SEC + tbf->mtu;
+                        lim = MIN(lim, lim2);
+                }
+                opt.limit = lim;
+        }
+
+        r = tc_fill_ratespec_and_table(&opt.rate, rtab, tbf->mtu);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to calculate ratespec: %m");
+
+        r = tc_transmit_time(opt.rate.rate, tbf->burst, &opt.buffer);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to calculate buffer size: %m");
+
+        if (opt.peakrate.rate > 0) {
+                opt.peakrate.mpu = tbf->mpu;
+
+                r = tc_fill_ratespec_and_table(&opt.peakrate, ptab, tbf->mtu);
+                if (r < 0)
+                        return log_link_debug_errno(link, r, "Failed to calculate ratespec: %m");
+
+                r = tc_transmit_time(opt.peakrate.rate, tbf->mtu, &opt.mtu);
+                if (r < 0)
+                        return log_link_debug_errno(link, r, "Failed to calculate mtu size: %m");
+        }
+
+        r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "tbf");
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_data(req, TCA_TBF_PARMS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_data(req, TCA_TBF_BURST, &tbf->burst, sizeof(tbf->burst));
+        if (r < 0)
+                return r;
+
+        if (tbf->rate >= (1ULL << 32)) {
+                r = sd_netlink_message_append_u64(req, TCA_TBF_RATE64, tbf->rate);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_data(req, TCA_TBF_RTAB, rtab, sizeof(rtab));
+        if (r < 0)
+                return r;
+
+        if (opt.peakrate.rate > 0) {
+                if (tbf->peak_rate >= (1ULL << 32)) {
+                        r = sd_netlink_message_append_u64(req, TCA_TBF_PRATE64, tbf->peak_rate);
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_append_u32(req, TCA_TBF_PBURST, tbf->mtu);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_data(req, TCA_TBF_PTAB, ptab, sizeof(ptab));
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_token_bucket_filter_size(
+                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;
+        Network *network = ASSERT_PTR(data);
+        TokenBucketFilter *tbf;
+        uint64_t k;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_TBF, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        tbf = TBF(qdisc);
+
+        if (isempty(rvalue)) {
+                if (STR_IN_SET(lvalue, "BurstBytes", "Burst"))
+                        tbf->burst = 0;
+                else if (STR_IN_SET(lvalue, "LimitBytes", "LimitSize"))
+                        tbf->limit = 0;
+                else if (streq(lvalue, "MTUBytes"))
+                        tbf->mtu = 0;
+                else if (streq(lvalue, "MPUBytes"))
+                        tbf->mpu = 0;
+                else
+                        assert_not_reached();
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (STR_IN_SET(lvalue, "BurstBytes", "Burst"))
+                tbf->burst = k;
+        else if (STR_IN_SET(lvalue, "LimitBytes", "LimitSize"))
+                tbf->limit = k;
+        else if (streq(lvalue, "MPUBytes"))
+                tbf->mpu = k;
+        else if (streq(lvalue, "MTUBytes"))
+                tbf->mtu = k;
+        else
+                assert_not_reached();
+
+        TAKE_PTR(qdisc);
+
+        return 0;
+}
+
+int config_parse_token_bucket_filter_rate(
+                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;
+        Network *network = ASSERT_PTR(data);
+        TokenBucketFilter *tbf;
+        uint64_t k, *p;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_TBF, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        tbf = TBF(qdisc);
+        if (streq(lvalue, "Rate"))
+                p = &tbf->rate;
+        else if (streq(lvalue, "PeakRate"))
+                p = &tbf->peak_rate;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *p = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1000, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        *p = k / 8;
+
+        qdisc = NULL;
+
+        return 0;
+}
+
+int config_parse_token_bucket_filter_latency(
+                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;
+        Network *network = ASSERT_PTR(data);
+        TokenBucketFilter *tbf;
+        usec_t u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_TBF, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        tbf = TBF(qdisc);
+
+        if (isempty(rvalue)) {
+                tbf->latency = 0;
+
+                qdisc = NULL;
+                return 0;
+        }
+
+        r = parse_sec(rvalue, &u);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        tbf->latency = u;
+
+        qdisc = NULL;
+
+        return 0;
+}
+
+static int token_bucket_filter_verify(QDisc *qdisc) {
+        TokenBucketFilter *tbf = TBF(qdisc);
+
+        if (tbf->limit > 0 && tbf->latency > 0)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: Specifying both LimitBytes= and LatencySec= is not allowed. "
+                                         "Ignoring [TokenBucketFilter] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        if (tbf->limit == 0 && tbf->latency == 0)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: Either LimitBytes= or LatencySec= is required. "
+                                         "Ignoring [TokenBucketFilter] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        if (tbf->rate == 0)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: Rate= is mandatory. "
+                                         "Ignoring [TokenBucketFilter] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        if (tbf->burst == 0)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: BurstBytes= is mandatory. "
+                                         "Ignoring [TokenBucketFilter] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        if (tbf->peak_rate > 0 && tbf->mtu == 0)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: MTUBytes= is mandatory when PeakRate= is specified. "
+                                         "Ignoring [TokenBucketFilter] section from line %u.",
+                                         qdisc->section->filename, qdisc->section->line);
+
+        return 0;
+}
+
+const QDiscVTable tbf_vtable = {
+        .object_size = sizeof(TokenBucketFilter),
+        .tca_kind = "tbf",
+        .fill_message = token_bucket_filter_fill_message,
+        .verify = token_bucket_filter_verify
+};
diff --git a/src/network/tc/tbf.h b/src/network/tc/tbf.h
new file mode 100644
index 0000000..6b4b017
--- /dev/null
+++ b/src/network/tc/tbf.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+#include "time-util.h"
+
+typedef struct TokenBucketFilter {
+        QDisc meta;
+
+        uint64_t rate;
+        uint64_t peak_rate;
+        uint32_t burst;
+        uint32_t mtu;
+        usec_t latency;
+        size_t limit;
+        size_t mpu;
+} TokenBucketFilter;
+
+DEFINE_QDISC_CAST(TBF, TokenBucketFilter);
+extern const QDiscVTable tbf_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_token_bucket_filter_latency);
+CONFIG_PARSER_PROTOTYPE(config_parse_token_bucket_filter_size);
+CONFIG_PARSER_PROTOTYPE(config_parse_token_bucket_filter_rate);
diff --git a/src/network/tc/tc-util.c b/src/network/tc/tc-util.c
new file mode 100644
index 0000000..3781182
--- /dev/null
+++ b/src/network/tc/tc-util.c
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include "alloc-util.h"
+#include "extract-word.h"
+#include "fileio.h"
+#include "parse-util.h"
+#include "percent-util.h"
+#include "tc-util.h"
+#include "time-util.h"
+
+int tc_init(double *ret_ticks_in_usec, uint32_t *ret_hz) {
+        static double ticks_in_usec = -1;
+        static uint32_t hz;
+
+        if (ticks_in_usec < 0) {
+                uint32_t clock_resolution, ticks_to_usec, usec_to_ticks;
+                _cleanup_free_ char *line = NULL;
+                double clock_factor;
+                int r;
+
+                r = read_one_line_file("/proc/net/psched", &line);
+                if (r < 0)
+                        return r;
+
+                r = sscanf(line, "%08x%08x%08x%08x", &ticks_to_usec, &usec_to_ticks, &clock_resolution, &hz);
+                if (r < 4)
+                        return -EIO;
+
+                clock_factor = (double) clock_resolution / USEC_PER_SEC;
+                ticks_in_usec = (double) ticks_to_usec / usec_to_ticks * clock_factor;
+        }
+
+        if (ret_ticks_in_usec)
+                *ret_ticks_in_usec = ticks_in_usec;
+        if (ret_hz)
+                *ret_hz = hz;
+
+        return 0;
+}
+
+int tc_time_to_tick(usec_t t, uint32_t *ret) {
+        double ticks_in_usec;
+        usec_t a;
+        int r;
+
+        assert(ret);
+
+        r = tc_init(&ticks_in_usec, NULL);
+        if (r < 0)
+                return r;
+
+        a = t * ticks_in_usec;
+        if (a > UINT32_MAX)
+                return -ERANGE;
+
+        *ret = a;
+        return 0;
+}
+
+int parse_tc_percent(const char *s, uint32_t *ret_fraction) {
+        int r;
+
+        assert(s);
+        assert(ret_fraction);
+
+        r = parse_permyriad(s);
+        if (r < 0)
+                return r;
+
+        *ret_fraction = (double) r / 10000 * UINT32_MAX;
+        return 0;
+}
+
+int tc_transmit_time(uint64_t rate, uint32_t size, uint32_t *ret) {
+        return tc_time_to_tick(USEC_PER_SEC * ((double)size / (double)rate), ret);
+}
+
+int tc_fill_ratespec_and_table(struct tc_ratespec *rate, uint32_t *rtab, uint32_t mtu) {
+        uint32_t cell_log = 0;
+        int r;
+
+        if (mtu == 0)
+                mtu = 2047;
+
+        while ((mtu >> cell_log) > 255)
+                cell_log++;
+
+        for (size_t i = 0; i < 256; i++) {
+                uint32_t sz;
+
+                sz = (i + 1) << cell_log;
+                if (sz < rate->mpu)
+                        sz = rate->mpu;
+                r = tc_transmit_time(rate->rate, sz, &rtab[i]);
+                if (r < 0)
+                        return r;
+        }
+
+        rate->cell_align = -1;
+        rate->cell_log = cell_log;
+        rate->linklayer = TC_LINKLAYER_ETHERNET;
+        return 0;
+}
+
+int parse_handle(const char *t, uint32_t *ret) {
+        _cleanup_free_ char *word = NULL;
+        uint16_t major, minor;
+        int r;
+
+        assert(t);
+        assert(ret);
+
+        /* Extract the major number. */
+        r = extract_first_word(&t, &word, ":", EXTRACT_DONT_COALESCE_SEPARATORS);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return -EINVAL;
+        if (!t)
+                return -EINVAL;
+
+        r = safe_atou16_full(word, 16, &major);
+        if (r < 0)
+                return r;
+
+        r = safe_atou16_full(t, 16, &minor);
+        if (r < 0)
+                return r;
+
+        *ret = ((uint32_t) major << 16) | minor;
+        return 0;
+}
diff --git a/src/network/tc/tc-util.h b/src/network/tc/tc-util.h
new file mode 100644
index 0000000..83bad8e
--- /dev/null
+++ b/src/network/tc/tc-util.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include <linux/pkt_sched.h>
+
+#include "time-util.h"
+
+int tc_init(double *ret_ticks_in_usec, uint32_t *ret_hz);
+int tc_time_to_tick(usec_t t, uint32_t *ret);
+int parse_tc_percent(const char *s, uint32_t *percent);
+int tc_transmit_time(uint64_t rate, uint32_t size, uint32_t *ret);
+int tc_fill_ratespec_and_table(struct tc_ratespec *rate, uint32_t *rtab, uint32_t mtu);
+int parse_handle(const char *t, uint32_t *ret);
diff --git a/src/network/tc/tc.c b/src/network/tc/tc.c
new file mode 100644
index 0000000..8a1c5b3
--- /dev/null
+++ b/src/network/tc/tc.c
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "macro.h"
+#include "networkd-link.h"
+#include "networkd-network.h"
+#include "qdisc.h"
+#include "tc.h"
+#include "tclass.h"
+
+int link_request_traffic_control(Link *link) {
+        TClass *tclass;
+        QDisc *qdisc;
+        int r;
+
+        assert(link);
+        assert(link->network);
+
+        link->tc_configured = false;
+
+        HASHMAP_FOREACH(qdisc, link->network->qdiscs_by_section) {
+                r = link_request_qdisc(link, qdisc);
+                if (r < 0)
+                        return r;
+        }
+
+        HASHMAP_FOREACH(tclass, link->network->tclasses_by_section) {
+                r = link_request_tclass(link, tclass);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link->tc_messages == 0) {
+                link->tc_configured = true;
+                link_check_ready(link);
+        } else {
+                log_link_debug(link, "Setting traffic control");
+                link_set_state(link, LINK_STATE_CONFIGURING);
+        }
+
+        return 0;
+}
diff --git a/src/network/tc/tc.h b/src/network/tc/tc.h
new file mode 100644
index 0000000..6226578
--- /dev/null
+++ b/src/network/tc/tc.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct Link Link;
+
+int link_request_traffic_control(Link *link);
diff --git a/src/network/tc/tclass.c b/src/network/tc/tclass.c
new file mode 100644
index 0000000..0a5fec0
--- /dev/null
+++ b/src/network/tc/tclass.c
@@ -0,0 +1,639 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "in-addr-util.h"
+#include "netlink-util.h"
+#include "networkd-link.h"
+#include "networkd-manager.h"
+#include "networkd-network.h"
+#include "networkd-queue.h"
+#include "parse-util.h"
+#include "set.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tc-util.h"
+#include "tclass.h"
+
+const TClassVTable * const tclass_vtable[_TCLASS_KIND_MAX] = {
+        [TCLASS_KIND_DRR] = &drr_tclass_vtable,
+        [TCLASS_KIND_HTB] = &htb_tclass_vtable,
+        [TCLASS_KIND_QFQ] = &qfq_tclass_vtable,
+};
+
+static int tclass_new(TClassKind kind, TClass **ret) {
+        _cleanup_(tclass_freep) TClass *tclass = NULL;
+        int r;
+
+        if (kind == _TCLASS_KIND_INVALID) {
+                tclass = new(TClass, 1);
+                if (!tclass)
+                        return -ENOMEM;
+
+                *tclass = (TClass) {
+                        .parent = TC_H_ROOT,
+                        .kind = kind,
+                };
+        } else {
+                assert(kind >= 0 && kind < _TCLASS_KIND_MAX);
+                tclass = malloc0(tclass_vtable[kind]->object_size);
+                if (!tclass)
+                        return -ENOMEM;
+
+                tclass->parent = TC_H_ROOT;
+                tclass->kind = kind;
+
+                if (TCLASS_VTABLE(tclass)->init) {
+                        r = TCLASS_VTABLE(tclass)->init(tclass);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        *ret = TAKE_PTR(tclass);
+
+        return 0;
+}
+
+int tclass_new_static(TClassKind kind, Network *network, const char *filename, unsigned section_line, TClass **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(tclass_freep) TClass *tclass = NULL;
+        TClass *existing;
+        int r;
+
+        assert(network);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        existing = hashmap_get(network->tclasses_by_section, n);
+        if (existing) {
+                if (existing->kind != kind)
+                        return -EINVAL;
+
+                *ret = existing;
+                return 0;
+        }
+
+        r = tclass_new(kind, &tclass);
+        if (r < 0)
+                return r;
+
+        tclass->network = network;
+        tclass->section = TAKE_PTR(n);
+        tclass->source = NETWORK_CONFIG_SOURCE_STATIC;
+
+        r = hashmap_ensure_put(&network->tclasses_by_section, &config_section_hash_ops, tclass->section, tclass);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(tclass);
+        return 0;
+}
+
+TClass* tclass_free(TClass *tclass) {
+        if (!tclass)
+                return NULL;
+
+        if (tclass->network && tclass->section)
+                hashmap_remove(tclass->network->tclasses_by_section, tclass->section);
+
+        config_section_free(tclass->section);
+
+        if (tclass->link)
+                set_remove(tclass->link->tclasses, tclass);
+
+        free(tclass->tca_kind);
+        return mfree(tclass);
+}
+
+static const char *tclass_get_tca_kind(const TClass *tclass) {
+        assert(tclass);
+
+        return (TCLASS_VTABLE(tclass) && TCLASS_VTABLE(tclass)->tca_kind) ?
+                TCLASS_VTABLE(tclass)->tca_kind : tclass->tca_kind;
+}
+
+static void tclass_hash_func(const TClass *tclass, struct siphash *state) {
+        assert(tclass);
+        assert(state);
+
+        siphash24_compress(&tclass->classid, sizeof(tclass->classid), state);
+        siphash24_compress(&tclass->parent, sizeof(tclass->parent), state);
+        siphash24_compress_string(tclass_get_tca_kind(tclass), state);
+}
+
+static int tclass_compare_func(const TClass *a, const TClass *b) {
+        int r;
+
+        assert(a);
+        assert(b);
+
+        r = CMP(a->classid, b->classid);
+        if (r != 0)
+                return r;
+
+        r = CMP(a->parent, b->parent);
+        if (r != 0)
+                return r;
+
+        return strcmp_ptr(tclass_get_tca_kind(a), tclass_get_tca_kind(b));
+}
+
+DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
+        tclass_hash_ops,
+        TClass,
+        tclass_hash_func,
+        tclass_compare_func,
+        tclass_free);
+
+static int tclass_get(Link *link, const TClass *in, TClass **ret) {
+        TClass *existing;
+
+        assert(link);
+        assert(in);
+
+        existing = set_get(link->tclasses, in);
+        if (!existing)
+                return -ENOENT;
+
+        if (ret)
+                *ret = existing;
+        return 0;
+}
+
+static int tclass_add(Link *link, TClass *tclass) {
+        int r;
+
+        assert(link);
+        assert(tclass);
+
+        r = set_ensure_put(&link->tclasses, &tclass_hash_ops, tclass);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return -EEXIST;
+
+        tclass->link = link;
+        return 0;
+}
+
+static int tclass_dup(const TClass *src, TClass **ret) {
+        _cleanup_(tclass_freep) TClass *dst = NULL;
+
+        assert(src);
+        assert(ret);
+
+        if (TCLASS_VTABLE(src))
+                dst = memdup(src, TCLASS_VTABLE(src)->object_size);
+        else
+                dst = newdup(TClass, src, 1);
+        if (!dst)
+                return -ENOMEM;
+
+        /* clear all pointers */
+        dst->network = NULL;
+        dst->section = NULL;
+        dst->link = NULL;
+        dst->tca_kind = NULL;
+
+        if (src->tca_kind) {
+                dst->tca_kind = strdup(src->tca_kind);
+                if (!dst->tca_kind)
+                        return -ENOMEM;
+        }
+
+        *ret = TAKE_PTR(dst);
+        return 0;
+}
+
+int link_find_tclass(Link *link, uint32_t classid, TClass **ret) {
+        TClass *tclass;
+
+        assert(link);
+
+        SET_FOREACH(tclass, link->tclasses) {
+                if (tclass->classid != classid)
+                        continue;
+
+                if (!tclass_exists(tclass))
+                        continue;
+
+                if (ret)
+                        *ret = tclass;
+                return 0;
+        }
+
+        return -ENOENT;
+}
+
+static void log_tclass_debug(TClass *tclass, Link *link, const char *str) {
+        _cleanup_free_ char *state = NULL;
+
+        assert(tclass);
+        assert(str);
+
+        if (!DEBUG_LOGGING)
+                return;
+
+        (void) network_config_state_to_string_alloc(tclass->state, &state);
+
+        log_link_debug(link, "%s %s TClass (%s): classid=%"PRIx32":%"PRIx32", parent=%"PRIx32":%"PRIx32", kind=%s",
+                       str, strna(network_config_source_to_string(tclass->source)), strna(state),
+                       TC_H_MAJ(tclass->classid) >> 16, TC_H_MIN(tclass->classid),
+                       TC_H_MAJ(tclass->parent) >> 16, TC_H_MIN(tclass->parent),
+                       strna(tclass_get_tca_kind(tclass)));
+}
+
+TClass* tclass_drop(TClass *tclass) {
+        QDisc *qdisc;
+        Link *link;
+
+        assert(tclass);
+
+        link = ASSERT_PTR(tclass->link);
+
+        /* Also drop all child qdiscs assigned to the class. */
+        SET_FOREACH(qdisc, link->qdiscs) {
+                if (qdisc->parent != tclass->classid)
+                        continue;
+
+                qdisc_drop(qdisc);
+        }
+
+        tclass_enter_removed(tclass);
+
+        if (tclass->state == 0) {
+                log_tclass_debug(tclass, link, "Forgetting");
+                tclass = tclass_free(tclass);
+        } else
+                log_tclass_debug(tclass, link, "Removed");
+
+        return tclass;
+}
+
+static int tclass_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, TClass *tclass) {
+        int r;
+
+        assert(m);
+        assert(link);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_message_error_errno(link, m, r, "Could not set TClass");
+                link_enter_failed(link);
+                return 1;
+        }
+
+        if (link->tc_messages == 0) {
+                log_link_debug(link, "Traffic control configured");
+                link->tc_configured = true;
+                link_check_ready(link);
+        }
+
+        return 1;
+}
+
+static int tclass_configure(TClass *tclass, Link *link, Request *req) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(tclass);
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+        assert(link->ifindex > 0);
+        assert(req);
+
+        log_tclass_debug(tclass, link, "Configuring");
+
+        r = sd_rtnl_message_new_traffic_control(link->manager->rtnl, &m, RTM_NEWTCLASS,
+                                                link->ifindex, tclass->classid, tclass->parent);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_string(m, TCA_KIND, TCLASS_VTABLE(tclass)->tca_kind);
+        if (r < 0)
+                return r;
+
+        if (TCLASS_VTABLE(tclass)->fill_message) {
+                r = TCLASS_VTABLE(tclass)->fill_message(link, tclass, m);
+                if (r < 0)
+                        return r;
+        }
+
+        return request_call_netlink_async(link->manager->rtnl, m, req);
+}
+
+static bool tclass_is_ready_to_configure(TClass *tclass, Link *link) {
+        assert(tclass);
+        assert(link);
+
+        if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
+                return false;
+
+        return link_find_qdisc(link, TC_H_MAJ(tclass->classid), tclass_get_tca_kind(tclass), NULL) >= 0;
+}
+
+static int tclass_process_request(Request *req, Link *link, TClass *tclass) {
+        int r;
+
+        assert(req);
+        assert(link);
+        assert(tclass);
+
+        if (!tclass_is_ready_to_configure(tclass, link))
+                return 0;
+
+        r = tclass_configure(tclass, link, req);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "Failed to configure TClass: %m");
+
+        tclass_enter_configuring(tclass);
+        return 1;
+}
+
+int link_request_tclass(Link *link, TClass *tclass) {
+        TClass *existing;
+        int r;
+
+        assert(link);
+        assert(tclass);
+
+        if (tclass_get(link, tclass, &existing) < 0) {
+                _cleanup_(tclass_freep) TClass *tmp = NULL;
+
+                r = tclass_dup(tclass, &tmp);
+                if (r < 0)
+                        return log_oom();
+
+                r = tclass_add(link, tmp);
+                if (r < 0)
+                        return log_link_warning_errno(link, r, "Failed to store TClass: %m");
+
+                existing = TAKE_PTR(tmp);
+        } else
+                existing->source = tclass->source;
+
+        log_tclass_debug(existing, link, "Requesting");
+        r = link_queue_request_safe(link, REQUEST_TYPE_TC_CLASS,
+                                    existing, NULL,
+                                    tclass_hash_func,
+                                    tclass_compare_func,
+                                    tclass_process_request,
+                                    &link->tc_messages,
+                                    tclass_handler,
+                                    NULL);
+        if (r < 0)
+                return log_link_warning_errno(link, r, "Failed to request TClass: %m");
+        if (r == 0)
+                return 0;
+
+        tclass_enter_requesting(existing);
+        return 1;
+}
+
+int manager_rtnl_process_tclass(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
+        _cleanup_(tclass_freep) TClass *tmp = NULL;
+        TClass *tclass = NULL;
+        Link *link;
+        uint16_t type;
+        int ifindex, r;
+
+        assert(rtnl);
+        assert(message);
+        assert(m);
+
+        if (sd_netlink_message_is_error(message)) {
+                r = sd_netlink_message_get_errno(message);
+                if (r < 0)
+                        log_message_warning_errno(message, r, "rtnl: failed to receive TClass message, ignoring");
+
+                return 0;
+        }
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
+                return 0;
+        } else if (!IN_SET(type, RTM_NEWTCLASS, RTM_DELTCLASS)) {
+                log_warning("rtnl: received unexpected message type %u when processing TClass, ignoring.", type);
+                return 0;
+        }
+
+        r = sd_rtnl_message_traffic_control_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
+                return 0;
+        } else if (ifindex <= 0) {
+                log_warning("rtnl: received TClass message with invalid ifindex %d, ignoring.", ifindex);
+                return 0;
+        }
+
+        if (link_get_by_index(m, ifindex, &link) < 0) {
+                if (!m->enumerating)
+                        log_warning("rtnl: received TClass for link '%d' we don't know about, ignoring.", ifindex);
+                return 0;
+        }
+
+        r = tclass_new(_TCLASS_KIND_INVALID, &tmp);
+        if (r < 0)
+                return log_oom();
+
+        r = sd_rtnl_message_traffic_control_get_handle(message, &tmp->classid);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received TClass message without handle, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_rtnl_message_traffic_control_get_parent(message, &tmp->parent);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received TClass message without parent, ignoring: %m");
+                return 0;
+        }
+
+        r = sd_netlink_message_read_string_strdup(message, TCA_KIND, &tmp->tca_kind);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "rtnl: received TClass message without kind, ignoring: %m");
+                return 0;
+        }
+
+        (void) tclass_get(link, tmp, &tclass);
+
+        switch (type) {
+        case RTM_NEWTCLASS:
+                if (tclass) {
+                        tclass_enter_configured(tclass);
+                        log_tclass_debug(tclass, link, "Received remembered");
+                } else {
+                        tclass_enter_configured(tmp);
+                        log_tclass_debug(tmp, link, "Received new");
+
+                        r = tclass_add(link, tmp);
+                        if (r < 0) {
+                                log_link_warning_errno(link, r, "Failed to remember TClass, ignoring: %m");
+                                return 0;
+                        }
+
+                        tclass = TAKE_PTR(tmp);
+                }
+
+                break;
+
+        case RTM_DELTCLASS:
+                if (tclass)
+                        (void) tclass_drop(tclass);
+                else
+                        log_tclass_debug(tmp, link, "Kernel removed unknown");
+
+                break;
+
+        default:
+                assert_not_reached();
+        }
+
+        return 1;
+}
+
+int link_enumerate_tclass(Link *link, uint32_t parent) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+
+        r = sd_rtnl_message_new_traffic_control(link->manager->rtnl, &req, RTM_GETTCLASS, link->ifindex, 0, parent);
+        if (r < 0)
+                return r;
+
+        return manager_enumerate_internal(link->manager, link->manager->rtnl, req, manager_rtnl_process_tclass);
+}
+
+static int tclass_section_verify(TClass *tclass) {
+        int r;
+
+        assert(tclass);
+
+        if (section_is_invalid(tclass->section))
+                return -EINVAL;
+
+        if (TCLASS_VTABLE(tclass)->verify) {
+                r = TCLASS_VTABLE(tclass)->verify(tclass);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+void network_drop_invalid_tclass(Network *network) {
+        TClass *tclass;
+
+        assert(network);
+
+        HASHMAP_FOREACH(tclass, network->tclasses_by_section)
+                if (tclass_section_verify(tclass) < 0)
+                        tclass_free(tclass);
+}
+
+int config_parse_tclass_parent(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(ltype, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        if (streq(rvalue, "root"))
+                tclass->parent = TC_H_ROOT;
+        else {
+                r = parse_handle(rvalue, &tclass->parent);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse 'Parent=', ignoring assignment: %s",
+                                   rvalue);
+                        return 0;
+                }
+        }
+
+        TAKE_PTR(tclass);
+
+        return 0;
+}
+
+int config_parse_tclass_classid(
+                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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+        Network *network = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = tclass_new_static(ltype, network, filename, section_line, &tclass);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to create traffic control class, ignoring assignment: %m");
+                return 0;
+        }
+
+        if (isempty(rvalue)) {
+                tclass->classid = TC_H_UNSPEC;
+                TAKE_PTR(tclass);
+                return 0;
+        }
+
+        r = parse_handle(rvalue, &tclass->classid);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse 'ClassId=', ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(tclass);
+
+        return 0;
+}
diff --git a/src/network/tc/tclass.h b/src/network/tc/tclass.h
new file mode 100644
index 0000000..e73e23c
--- /dev/null
+++ b/src/network/tc/tclass.h
@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+#pragma once
+
+#include "conf-parser.h"
+#include "networkd-util.h"
+
+typedef struct Link Link;
+typedef struct Manager Manager;
+typedef struct Network Network;
+
+typedef enum TClassKind {
+        TCLASS_KIND_DRR,
+        TCLASS_KIND_HTB,
+        TCLASS_KIND_QFQ,
+        _TCLASS_KIND_MAX,
+        _TCLASS_KIND_INVALID = -EINVAL,
+} TClassKind;
+
+typedef struct TClass {
+        Link *link;
+        Network *network;
+        ConfigSection *section;
+        NetworkConfigSource source;
+        NetworkConfigState state;
+
+        uint32_t classid;
+        uint32_t parent;
+
+        TClassKind kind;
+        char *tca_kind;
+} TClass;
+
+typedef struct TClassVTable {
+        size_t object_size;
+        const char *tca_kind;
+        /* called in tclass_new() */
+        int (*init)(TClass *tclass);
+        int (*fill_message)(Link *link, TClass *tclass, sd_netlink_message *m);
+        int (*verify)(TClass *tclass);
+} TClassVTable;
+
+extern const TClassVTable * const tclass_vtable[_TCLASS_KIND_MAX];
+
+#define TCLASS_VTABLE(t) ((t)->kind != _TCLASS_KIND_INVALID ? tclass_vtable[(t)->kind] : NULL)
+
+/* For casting a tclass into the various tclass kinds */
+#define DEFINE_TCLASS_CAST(UPPERCASE, MixedCase)                          \
+        static inline MixedCase* TCLASS_TO_##UPPERCASE(TClass *t) {       \
+                if (_unlikely_(!t || t->kind != TCLASS_KIND_##UPPERCASE)) \
+                        return NULL;                                      \
+                                                                          \
+                return (MixedCase*) t;                                    \
+        }
+
+DEFINE_NETWORK_CONFIG_STATE_FUNCTIONS(TClass, tclass);
+
+TClass* tclass_free(TClass *tclass);
+int tclass_new_static(TClassKind kind, Network *network, const char *filename, unsigned section_line, TClass **ret);
+
+TClass* tclass_drop(TClass *tclass);
+
+int link_find_tclass(Link *link, uint32_t classid, TClass **ret);
+
+int link_request_tclass(Link *link, TClass *tclass);
+
+void network_drop_invalid_tclass(Network *network);
+
+int manager_rtnl_process_tclass(sd_netlink *rtnl, sd_netlink_message *message, Manager *m);
+int link_enumerate_tclass(Link *link, uint32_t parent);
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(TClass, tclass_free);
+
+CONFIG_PARSER_PROTOTYPE(config_parse_tclass_parent);
+CONFIG_PARSER_PROTOTYPE(config_parse_tclass_classid);
+
+#include "drr.h"
+#include "htb.h"
+#include "qfq.h"
diff --git a/src/network/tc/teql.c b/src/network/tc/teql.c
new file mode 100644
index 0000000..dcb149d
--- /dev/null
+++ b/src/network/tc/teql.c
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "macro.h"
+#include "networkd-link.h"
+#include "parse-util.h"
+#include "string-util.h"
+#include "teql.h"
+
+static int trivial_link_equalizer_verify(QDisc *qdisc) {
+        _cleanup_free_ char *tca_kind = NULL;
+        TrivialLinkEqualizer *teql;
+
+        teql = TEQL(ASSERT_PTR(qdisc));
+
+        if (asprintf(&tca_kind, "teql%u", teql->id) < 0)
+                return log_oom();
+
+        return free_and_replace(qdisc->tca_kind, tca_kind);
+}
+
+static int trivial_link_equalizer_is_ready(QDisc *qdisc, Link *link) {
+        Link *teql;
+
+        assert(qdisc);
+        assert(qdisc->tca_kind);
+        assert(link);
+        assert(link->manager);
+
+        if (link_get_by_name(link->manager, qdisc->tca_kind, &teql) < 0)
+                return false;
+
+        return link_is_ready_to_configure(teql, /* allow_unmanaged = */ true);
+}
+
+const QDiscVTable teql_vtable = {
+        .object_size = sizeof(TrivialLinkEqualizer),
+        .verify = trivial_link_equalizer_verify,
+        .is_ready = trivial_link_equalizer_is_ready,
+};
+
+int config_parse_trivial_link_equalizer_id(
+                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;
+        TrivialLinkEqualizer *teql;
+        Network *network = ASSERT_PTR(data);
+        unsigned id;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_TEQL, network, filename, section_line, &qdisc);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "More than one kind of queueing discipline, ignoring assignment: %m");
+                return 0;
+        }
+
+        teql = TEQL(qdisc);
+
+        if (isempty(rvalue)) {
+                teql->id = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou(rvalue, &id);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (id > INT_MAX)
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "'%s=' is too large, ignoring assignment: %s",
+                           lvalue, rvalue);
+
+        teql->id = id;
+
+        TAKE_PTR(qdisc);
+        return 0;
+}
diff --git a/src/network/tc/teql.h b/src/network/tc/teql.h
new file mode 100644
index 0000000..8d0085e
--- /dev/null
+++ b/src/network/tc/teql.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "conf-parser.h"
+#include "qdisc.h"
+
+typedef struct TrivialLinkEqualizer {
+        QDisc meta;
+
+        unsigned id;
+} TrivialLinkEqualizer;
+
+DEFINE_QDISC_CAST(TEQL, TrivialLinkEqualizer);
+extern const QDiscVTable teql_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_trivial_link_equalizer_id);