237 lines
7 KiB
C
237 lines
7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later
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* Copyright © 2019 VMware, Inc. */
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#include <linux/pkt_sched.h>
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#include "alloc-util.h"
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#include "conf-parser.h"
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#include "netem.h"
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#include "netlink-util.h"
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#include "networkd-manager.h"
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#include "parse-util.h"
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#include "qdisc.h"
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#include "strv.h"
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#include "tc-util.h"
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static int network_emulator_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
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struct tc_netem_qopt opt = {
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.limit = 1000,
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};
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NetworkEmulator *ne;
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int r;
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assert(link);
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assert(qdisc);
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assert(req);
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ne = NETEM(qdisc);
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if (ne->limit > 0)
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opt.limit = ne->limit;
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if (ne->loss > 0)
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opt.loss = ne->loss;
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if (ne->duplicate > 0)
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opt.duplicate = ne->duplicate;
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if (ne->delay != USEC_INFINITY) {
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r = tc_time_to_tick(ne->delay, &opt.latency);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to calculate latency in TCA_OPTION: %m");
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}
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if (ne->jitter != USEC_INFINITY) {
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r = tc_time_to_tick(ne->jitter, &opt.jitter);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to calculate jitter in TCA_OPTION: %m");
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}
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r = sd_netlink_message_append_data(req, TCA_OPTIONS, &opt, sizeof(struct tc_netem_qopt));
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append TCA_OPTION attribute: %m");
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return 0;
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}
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int config_parse_network_emulator_delay(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
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Network *network = data;
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NetworkEmulator *ne;
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usec_t u;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"More than one kind of queueing discipline, ignoring assignment: %m");
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return 0;
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}
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ne = NETEM(qdisc);
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if (isempty(rvalue)) {
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if (STR_IN_SET(lvalue, "DelaySec", "NetworkEmulatorDelaySec"))
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ne->delay = USEC_INFINITY;
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else if (STR_IN_SET(lvalue, "DelayJitterSec", "NetworkEmulatorDelayJitterSec"))
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ne->jitter = USEC_INFINITY;
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qdisc = NULL;
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return 0;
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}
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r = parse_sec(rvalue, &u);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"Failed to parse '%s=', ignoring assignment: %s",
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lvalue, rvalue);
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return 0;
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}
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if (STR_IN_SET(lvalue, "DelaySec", "NetworkEmulatorDelaySec"))
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ne->delay = u;
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else if (STR_IN_SET(lvalue, "DelayJitterSec", "NetworkEmulatorDelayJitterSec"))
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ne->jitter = u;
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qdisc = NULL;
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return 0;
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}
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int config_parse_network_emulator_rate(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
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Network *network = data;
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NetworkEmulator *ne;
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uint32_t rate;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"More than one kind of queueing discipline, ignoring assignment: %m");
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return 0;
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}
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ne = NETEM(qdisc);
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if (isempty(rvalue)) {
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if (STR_IN_SET(lvalue, "LossRate", "NetworkEmulatorLossRate"))
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ne->loss = 0;
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else if (STR_IN_SET(lvalue, "DuplicateRate", "NetworkEmulatorDuplicateRate"))
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ne->duplicate = 0;
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qdisc = NULL;
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return 0;
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}
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r = parse_tc_percent(rvalue, &rate);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"Failed to parse '%s=', ignoring assignment: %s",
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lvalue, rvalue);
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return 0;
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}
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if (STR_IN_SET(lvalue, "LossRate", "NetworkEmulatorLossRate"))
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ne->loss = rate;
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else if (STR_IN_SET(lvalue, "DuplicateRate", "NetworkEmulatorDuplicateRate"))
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ne->duplicate = rate;
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qdisc = NULL;
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return 0;
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}
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int config_parse_network_emulator_packet_limit(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
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Network *network = data;
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NetworkEmulator *ne;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"More than one kind of queueing discipline, ignoring assignment: %m");
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return 0;
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}
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ne = NETEM(qdisc);
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if (isempty(rvalue)) {
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ne->limit = 0;
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qdisc = NULL;
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return 0;
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}
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r = safe_atou(rvalue, &ne->limit);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"Failed to parse '%s=', ignoring assignment: %s",
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lvalue, rvalue);
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return 0;
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}
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qdisc = NULL;
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return 0;
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}
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const QDiscVTable netem_vtable = {
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.object_size = sizeof(NetworkEmulator),
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.tca_kind = "netem",
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.fill_message = network_emulator_fill_message,
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};
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