diff options
Diffstat (limited to 'src/network/tc/codel.c')
| -rw-r--r-- | src/network/tc/codel.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/src/network/tc/codel.c b/src/network/tc/codel.c new file mode 100644 index 0000000..b5f95f7 --- /dev/null +++ b/src/network/tc/codel.c @@ -0,0 +1,252 @@ +/* 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); + + if (isempty(rvalue)) { + cd->ecn = -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; + } + + cd->ecn = r; + qdisc = NULL; + + return 0; +} + +const QDiscVTable codel_vtable = { + .object_size = sizeof(ControlledDelay), + .tca_kind = "codel", + .init = controlled_delay_init, + .fill_message = controlled_delay_fill_message, +}; |