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/* 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;
struct tc_gred_sopt opt = {};
int r;
assert(link);
assert(qdisc);
assert(req);
gred = GRED(qdisc);
opt.DPs = gred->virtual_queues;
opt.def_DP = gred->default_virtual_queue;
if (gred->grio >= 0)
opt.grio = gred->grio;
r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "gred");
if (r < 0)
return log_link_error_errno(link, r, "Could not open container TCA_OPTIONS: %m");
r = sd_netlink_message_append_data(req, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
if (r < 0)
return log_link_error_errno(link, r, "Could not append TCA_GRED_DPS attribute: %m");
r = sd_netlink_message_close_container(req);
if (r < 0)
return log_link_error_errno(link, r, "Could not close container TCA_OPTIONS: %m");
return 0;
}
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 = data;
uint32_t *p;
uint32_t v;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
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("Invalid lvalue.");
if (isempty(rvalue)) {
*p = 0;
qdisc = 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;
}
if (v > MAX_DPs)
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid '%s=', ignoring assignment: %s",
lvalue, rvalue);
*p = v;
qdisc = NULL;
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 = data;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
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 (isempty(rvalue)) {
gred->grio = -1;
qdisc = NULL;
return 0;
}
r = parse_boolean(rvalue);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse '%s=', ignoring assignment: %s",
lvalue, rvalue);
return 0;
}
gred->grio = r;
qdisc = NULL;
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,
};
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