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iproute2/tc/q_fq_codel.c
Toke Høiland-Jørgensen 4b301b87d7 tc: Add support for ce_threshold_value/mask in fq_codel 
Commit dfcb63ce1de6 ("fq_codel: generalise ce_threshold marking for subset
of traffic") added support in fq_codel for setting a value and mask that
will be applied to the diffserv/ECN byte to turn on the ce_threshold
feature for a subset of traffic.

This adds support to iproute for setting these values. The parameter is
called ce_threshold_selector and takes a value followed by a
slash-separated mask. Some examples:

 # apply ce_threshold to ECT(1) traffic
 tc qdisc replace dev eth0 root fq_codel ce_threshold 1ms ce_threshold_selector 0x1/0x3

 # apply ce_threshold to ECN-capable traffic marked as diffserv AF22
 tc qdisc replace dev eth0 root fq_codel ce_threshold 1ms ce_threshold_selector 0x50/0xfc

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
2021-12-13 20:19:37 -07:00

356 lines
12 KiB
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/*
* Fair Queue Codel
*
* Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, provided that this notice is retained in full, this
* software may be distributed under the terms of the GNU General
* Public License ("GPL") version 2, in which case the provisions of the
* GPL apply INSTEAD OF those given above.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include "utils.h"
#include "tc_util.h"
static void explain(void)
{
fprintf(stderr,
"Usage: ... fq_codel [ limit PACKETS ] [ flows NUMBER ]\n"
"[ memory_limit BYTES ]\n"
"[ target TIME ] [ interval TIME ]\n"
"[ quantum BYTES ] [ [no]ecn ]\n"
"[ ce_threshold TIME ]\n"
"[ ce_threshold_selector VALUE/MASK ]\n"
"[ drop_batch SIZE ]\n");
}
static int fq_codel_parse_opt(struct qdisc_util *qu, int argc, char **argv,
struct nlmsghdr *n, const char *dev)
{
unsigned int drop_batch = 0;
unsigned int limit = 0;
unsigned int flows = 0;
unsigned int target = 0;
unsigned int interval = 0;
unsigned int quantum = 0;
unsigned int ce_threshold = ~0U;
unsigned int memory = ~0U;
__u8 ce_threshold_mask = 0;
__u8 ce_threshold_selector = 0xFF;
int ecn = -1;
struct rtattr *tail;
while (argc > 0) {
if (strcmp(*argv, "limit") == 0) {
NEXT_ARG();
if (get_unsigned(&limit, *argv, 0)) {
fprintf(stderr, "Illegal \"limit\"\n");
return -1;
}
} else if (strcmp(*argv, "flows") == 0) {
NEXT_ARG();
if (get_unsigned(&flows, *argv, 0)) {
fprintf(stderr, "Illegal \"flows\"\n");
return -1;
}
} else if (strcmp(*argv, "quantum") == 0) {
NEXT_ARG();
if (get_unsigned(&quantum, *argv, 0)) {
fprintf(stderr, "Illegal \"quantum\"\n");
return -1;
}
} else if (strcmp(*argv, "drop_batch") == 0) {
NEXT_ARG();
if (get_unsigned(&drop_batch, *argv, 0)) {
fprintf(stderr, "Illegal \"drop_batch\"\n");
return -1;
}
} else if (strcmp(*argv, "target") == 0) {
NEXT_ARG();
if (get_time(&target, *argv)) {
fprintf(stderr, "Illegal \"target\"\n");
return -1;
}
} else if (strcmp(*argv, "ce_threshold") == 0) {
NEXT_ARG();
if (get_time(&ce_threshold, *argv)) {
fprintf(stderr, "Illegal \"ce_threshold\"\n");
return -1;
}
} else if (strcmp(*argv, "ce_threshold_selector") == 0) {
char *sep;
NEXT_ARG();
sep = strchr(*argv, '/');
if (!sep) {
fprintf(stderr, "Missing mask for \"ce_threshold_selector\"\n");
return -1;
}
*sep++ = '\0';
if (get_u8(&ce_threshold_mask, sep, 0)) {
fprintf(stderr, "Illegal mask for \"ce_threshold_selector\"\n");
return -1;
}
if (get_u8(&ce_threshold_selector, *argv, 0)) {
fprintf(stderr, "Illegal \"ce_threshold_selector\"\n");
return -1;
}
} else if (strcmp(*argv, "memory_limit") == 0) {
NEXT_ARG();
if (get_size(&memory, *argv)) {
fprintf(stderr, "Illegal \"memory_limit\"\n");
return -1;
}
} else if (strcmp(*argv, "interval") == 0) {
NEXT_ARG();
if (get_time(&interval, *argv)) {
fprintf(stderr, "Illegal \"interval\"\n");
return -1;
}
} else if (strcmp(*argv, "ecn") == 0) {
ecn = 1;
} else if (strcmp(*argv, "noecn") == 0) {
ecn = 0;
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
tail = addattr_nest(n, 1024, TCA_OPTIONS);
if (limit)
addattr_l(n, 1024, TCA_FQ_CODEL_LIMIT, &limit, sizeof(limit));
if (flows)
addattr_l(n, 1024, TCA_FQ_CODEL_FLOWS, &flows, sizeof(flows));
if (quantum)
addattr_l(n, 1024, TCA_FQ_CODEL_QUANTUM, &quantum, sizeof(quantum));
if (interval)
addattr_l(n, 1024, TCA_FQ_CODEL_INTERVAL, &interval, sizeof(interval));
if (target)
addattr_l(n, 1024, TCA_FQ_CODEL_TARGET, &target, sizeof(target));
if (ecn != -1)
addattr_l(n, 1024, TCA_FQ_CODEL_ECN, &ecn, sizeof(ecn));
if (ce_threshold != ~0U)
addattr_l(n, 1024, TCA_FQ_CODEL_CE_THRESHOLD,
&ce_threshold, sizeof(ce_threshold));
if (ce_threshold_selector != 0xFF) {
addattr8(n, 1024, TCA_FQ_CODEL_CE_THRESHOLD_MASK, ce_threshold_mask);
addattr8(n, 1024, TCA_FQ_CODEL_CE_THRESHOLD_SELECTOR, ce_threshold_selector);
}
if (memory != ~0U)
addattr_l(n, 1024, TCA_FQ_CODEL_MEMORY_LIMIT,
&memory, sizeof(memory));
if (drop_batch)
addattr_l(n, 1024, TCA_FQ_CODEL_DROP_BATCH_SIZE, &drop_batch, sizeof(drop_batch));
addattr_nest_end(n, tail);
return 0;
}
static int fq_codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_FQ_CODEL_MAX + 1];
unsigned int limit;
unsigned int flows;
unsigned int interval;
unsigned int target;
unsigned int ecn;
unsigned int quantum;
unsigned int ce_threshold;
__u8 ce_threshold_selector = 0;
__u8 ce_threshold_mask = 0;
unsigned int memory_limit;
unsigned int drop_batch;
SPRINT_BUF(b1);
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_FQ_CODEL_MAX, opt);
if (tb[TCA_FQ_CODEL_LIMIT] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_LIMIT]) >= sizeof(__u32)) {
limit = rta_getattr_u32(tb[TCA_FQ_CODEL_LIMIT]);
print_uint(PRINT_ANY, "limit", "limit %up ", limit);
}
if (tb[TCA_FQ_CODEL_FLOWS] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_FLOWS]) >= sizeof(__u32)) {
flows = rta_getattr_u32(tb[TCA_FQ_CODEL_FLOWS]);
print_uint(PRINT_ANY, "flows", "flows %u ", flows);
}
if (tb[TCA_FQ_CODEL_QUANTUM] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_QUANTUM]) >= sizeof(__u32)) {
quantum = rta_getattr_u32(tb[TCA_FQ_CODEL_QUANTUM]);
print_uint(PRINT_ANY, "quantum", "quantum %u ", quantum);
}
if (tb[TCA_FQ_CODEL_TARGET] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_TARGET]) >= sizeof(__u32)) {
target = rta_getattr_u32(tb[TCA_FQ_CODEL_TARGET]);
print_uint(PRINT_JSON, "target", NULL, target);
print_string(PRINT_FP, NULL, "target %s ",
sprint_time(target, b1));
}
if (tb[TCA_FQ_CODEL_CE_THRESHOLD] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_CE_THRESHOLD]) >= sizeof(__u32)) {
ce_threshold = rta_getattr_u32(tb[TCA_FQ_CODEL_CE_THRESHOLD]);
print_uint(PRINT_JSON, "ce_threshold", NULL, ce_threshold);
print_string(PRINT_FP, NULL, "ce_threshold %s ",
sprint_time(ce_threshold, b1));
}
if (tb[TCA_FQ_CODEL_CE_THRESHOLD_SELECTOR] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_CE_THRESHOLD_SELECTOR]) >= sizeof(__u8))
ce_threshold_selector = rta_getattr_u8(tb[TCA_FQ_CODEL_CE_THRESHOLD_SELECTOR]);
if (tb[TCA_FQ_CODEL_CE_THRESHOLD_MASK] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_CE_THRESHOLD_MASK]) >= sizeof(__u8))
ce_threshold_mask = rta_getattr_u8(tb[TCA_FQ_CODEL_CE_THRESHOLD_MASK]);
if (ce_threshold_mask || ce_threshold_selector) {
print_hhu(PRINT_ANY, "ce_threshold_selector", "ce_threshold_selector %#x",
ce_threshold_selector);
print_hhu(PRINT_ANY, "ce_threshold_mask", "/%#x ",
ce_threshold_mask);
}
if (tb[TCA_FQ_CODEL_INTERVAL] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_INTERVAL]) >= sizeof(__u32)) {
interval = rta_getattr_u32(tb[TCA_FQ_CODEL_INTERVAL]);
print_uint(PRINT_JSON, "interval", NULL, interval);
print_string(PRINT_FP, NULL, "interval %s ",
sprint_time(interval, b1));
}
if (tb[TCA_FQ_CODEL_MEMORY_LIMIT] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_MEMORY_LIMIT]) >= sizeof(__u32)) {
memory_limit = rta_getattr_u32(tb[TCA_FQ_CODEL_MEMORY_LIMIT]);
print_size(PRINT_ANY, "memory_limit", "memory_limit %s ",
memory_limit);
}
if (tb[TCA_FQ_CODEL_ECN] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_ECN]) >= sizeof(__u32)) {
ecn = rta_getattr_u32(tb[TCA_FQ_CODEL_ECN]);
if (ecn)
print_bool(PRINT_ANY, "ecn", "ecn ", true);
}
if (tb[TCA_FQ_CODEL_DROP_BATCH_SIZE] &&
RTA_PAYLOAD(tb[TCA_FQ_CODEL_DROP_BATCH_SIZE]) >= sizeof(__u32)) {
drop_batch = rta_getattr_u32(tb[TCA_FQ_CODEL_DROP_BATCH_SIZE]);
if (drop_batch)
print_uint(PRINT_ANY, "drop_batch", "drop_batch %u ", drop_batch);
}
return 0;
}
static int fq_codel_print_xstats(struct qdisc_util *qu, FILE *f,
struct rtattr *xstats)
{
struct tc_fq_codel_xstats _st = {}, *st;
SPRINT_BUF(b1);
if (xstats == NULL)
return 0;
st = RTA_DATA(xstats);
if (RTA_PAYLOAD(xstats) < sizeof(*st)) {
memcpy(&_st, st, RTA_PAYLOAD(xstats));
st = &_st;
}
if (st->type == TCA_FQ_CODEL_XSTATS_QDISC) {
print_uint(PRINT_ANY, "maxpacket", " maxpacket %u",
st->qdisc_stats.maxpacket);
print_uint(PRINT_ANY, "drop_overlimit", " drop_overlimit %u",
st->qdisc_stats.drop_overlimit);
print_uint(PRINT_ANY, "new_flow_count", " new_flow_count %u",
st->qdisc_stats.new_flow_count);
print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u",
st->qdisc_stats.ecn_mark);
if (st->qdisc_stats.ce_mark)
print_uint(PRINT_ANY, "ce_mark", " ce_mark %u",
st->qdisc_stats.ce_mark);
if (st->qdisc_stats.memory_usage)
print_uint(PRINT_ANY, "memory_used", " memory_used %u",
st->qdisc_stats.memory_usage);
if (st->qdisc_stats.drop_overmemory)
print_uint(PRINT_ANY, "drop_overmemory", " drop_overmemory %u",
st->qdisc_stats.drop_overmemory);
print_nl();
print_uint(PRINT_ANY, "new_flows_len", " new_flows_len %u",
st->qdisc_stats.new_flows_len);
print_uint(PRINT_ANY, "old_flows_len", " old_flows_len %u",
st->qdisc_stats.old_flows_len);
}
if (st->type == TCA_FQ_CODEL_XSTATS_CLASS) {
print_int(PRINT_ANY, "deficit", " deficit %d",
st->class_stats.deficit);
print_uint(PRINT_ANY, "count", " count %u",
st->class_stats.count);
print_uint(PRINT_ANY, "lastcount", " lastcount %u",
st->class_stats.lastcount);
print_uint(PRINT_JSON, "ldelay", NULL,
st->class_stats.ldelay);
print_string(PRINT_FP, NULL, " ldelay %s",
sprint_time(st->class_stats.ldelay, b1));
if (st->class_stats.dropping) {
print_bool(PRINT_ANY, "dropping", " dropping", true);
print_int(PRINT_JSON, "drop_next", NULL,
st->class_stats.drop_next);
if (st->class_stats.drop_next < 0)
print_string(PRINT_FP, NULL, " drop_next -%s",
sprint_time(-st->class_stats.drop_next, b1));
else {
print_string(PRINT_FP, NULL, " drop_next %s",
sprint_time(st->class_stats.drop_next, b1));
}
}
}
return 0;
}
struct qdisc_util fq_codel_qdisc_util = {
.id = "fq_codel",
.parse_qopt = fq_codel_parse_opt,
.print_qopt = fq_codel_print_opt,
.print_xstats = fq_codel_print_xstats,
};
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