diff options
Diffstat (limited to 'tc/q_fq.c')
| -rw-r--r-- | tc/q_fq.c | 598 |
1 files changed, 598 insertions, 0 deletions
diff --git a/tc/q_fq.c b/tc/q_fq.c new file mode 100644 index 0000000..7f8a2b8 --- /dev/null +++ b/tc/q_fq.c @@ -0,0 +1,598 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Fair Queue + * + * Copyright (C) 2013-2015 Eric Dumazet <edumazet@google.com> + */ + +#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 <stdbool.h> + +#include "utils.h" +#include "tc_util.h" + +static void explain(void) +{ + fprintf(stderr, + "Usage: ... fq [ limit PACKETS ] [ flow_limit PACKETS ]\n" + " [ quantum BYTES ] [ initial_quantum BYTES ]\n" + " [ maxrate RATE ] [ buckets NUMBER ]\n" + " [ [no]pacing ] [ refill_delay TIME ]\n" + " [ bands 3 priomap P0 P1 ... P14 P15 ]\n" + " [ weights W1 W2 W3 ]\n" + " [ low_rate_threshold RATE ]\n" + " [ orphan_mask MASK]\n" + " [ timer_slack TIME]\n" + " [ ce_threshold TIME ]\n" + " [ horizon TIME ]\n" + " [ horizon_{cap|drop} ]\n"); +} + +static unsigned int ilog2(unsigned int val) +{ + unsigned int res = 0; + + val--; + while (val) { + res++; + val >>= 1; + } + return res; +} + +static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv, + struct nlmsghdr *n, const char *dev) +{ + struct tc_prio_qopt prio2band; + unsigned int plimit; + unsigned int flow_plimit; + unsigned int quantum; + unsigned int initial_quantum; + unsigned int buckets = 0; + unsigned int maxrate; + unsigned int low_rate_threshold; + unsigned int defrate; + unsigned int refill_delay; + unsigned int orphan_mask; + unsigned int ce_threshold; + unsigned int timer_slack; + unsigned int horizon; + __u8 horizon_drop = 255; + bool set_plimit = false; + bool set_flow_plimit = false; + bool set_quantum = false; + bool set_initial_quantum = false; + bool set_maxrate = false; + bool set_defrate = false; + bool set_refill_delay = false; + bool set_orphan_mask = false; + bool set_low_rate_threshold = false; + bool set_ce_threshold = false; + bool set_timer_slack = false; + bool set_horizon = false; + bool set_priomap = false; + bool set_weights = false; + int weights[FQ_BANDS]; + int pacing = -1; + struct rtattr *tail; + + while (argc > 0) { + if (strcmp(*argv, "limit") == 0) { + NEXT_ARG(); + if (get_unsigned(&plimit, *argv, 0)) { + fprintf(stderr, "Illegal \"limit\"\n"); + return -1; + } + set_plimit = true; + } else if (strcmp(*argv, "flow_limit") == 0) { + NEXT_ARG(); + if (get_unsigned(&flow_plimit, *argv, 0)) { + fprintf(stderr, "Illegal \"flow_limit\"\n"); + return -1; + } + set_flow_plimit = true; + } else if (strcmp(*argv, "buckets") == 0) { + NEXT_ARG(); + if (get_unsigned(&buckets, *argv, 0)) { + fprintf(stderr, "Illegal \"buckets\"\n"); + return -1; + } + } else if (strcmp(*argv, "maxrate") == 0) { + NEXT_ARG(); + if (strchr(*argv, '%')) { + if (get_percent_rate(&maxrate, *argv, dev)) { + fprintf(stderr, "Illegal \"maxrate\"\n"); + return -1; + } + } else if (get_rate(&maxrate, *argv)) { + fprintf(stderr, "Illegal \"maxrate\"\n"); + return -1; + } + set_maxrate = true; + } else if (strcmp(*argv, "low_rate_threshold") == 0) { + NEXT_ARG(); + if (get_rate(&low_rate_threshold, *argv)) { + fprintf(stderr, "Illegal \"low_rate_threshold\"\n"); + return -1; + } + set_low_rate_threshold = true; + } else if (strcmp(*argv, "ce_threshold") == 0) { + NEXT_ARG(); + if (get_time(&ce_threshold, *argv)) { + fprintf(stderr, "Illegal \"ce_threshold\"\n"); + return -1; + } + set_ce_threshold = true; + } else if (strcmp(*argv, "timer_slack") == 0) { + __s64 t64; + + NEXT_ARG(); + if (get_time64(&t64, *argv)) { + fprintf(stderr, "Illegal \"timer_slack\"\n"); + return -1; + } + timer_slack = t64; + if (timer_slack != t64) { + fprintf(stderr, "Illegal (out of range) \"timer_slack\"\n"); + return -1; + } + set_timer_slack = true; + } else if (strcmp(*argv, "horizon_drop") == 0) { + horizon_drop = 1; + } else if (strcmp(*argv, "horizon_cap") == 0) { + horizon_drop = 0; + } else if (strcmp(*argv, "horizon") == 0) { + NEXT_ARG(); + if (get_time(&horizon, *argv)) { + fprintf(stderr, "Illegal \"horizon\"\n"); + return -1; + } + set_horizon = true; + } else if (strcmp(*argv, "defrate") == 0) { + NEXT_ARG(); + if (strchr(*argv, '%')) { + if (get_percent_rate(&defrate, *argv, dev)) { + fprintf(stderr, "Illegal \"defrate\"\n"); + return -1; + } + } else if (get_rate(&defrate, *argv)) { + fprintf(stderr, "Illegal \"defrate\"\n"); + return -1; + } + set_defrate = true; + } else if (strcmp(*argv, "quantum") == 0) { + NEXT_ARG(); + if (get_unsigned(&quantum, *argv, 0)) { + fprintf(stderr, "Illegal \"quantum\"\n"); + return -1; + } + set_quantum = true; + } else if (strcmp(*argv, "initial_quantum") == 0) { + NEXT_ARG(); + if (get_unsigned(&initial_quantum, *argv, 0)) { + fprintf(stderr, "Illegal \"initial_quantum\"\n"); + return -1; + } + set_initial_quantum = true; + } else if (strcmp(*argv, "orphan_mask") == 0) { + NEXT_ARG(); + if (get_unsigned(&orphan_mask, *argv, 0)) { + fprintf(stderr, "Illegal \"initial_quantum\"\n"); + return -1; + } + set_orphan_mask = true; + } else if (strcmp(*argv, "refill_delay") == 0) { + NEXT_ARG(); + if (get_time(&refill_delay, *argv)) { + fprintf(stderr, "Illegal \"refill_delay\"\n"); + return -1; + } + set_refill_delay = true; + } else if (strcmp(*argv, "pacing") == 0) { + pacing = 1; + } else if (strcmp(*argv, "nopacing") == 0) { + pacing = 0; + } else if (strcmp(*argv, "bands") == 0) { + int idx; + + if (set_priomap) { + fprintf(stderr, "Duplicate \"bands\"\n"); + return -1; + } + memset(&prio2band, 0, sizeof(prio2band)); + NEXT_ARG(); + if (get_integer(&prio2band.bands, *argv, 10)) { + fprintf(stderr, "Illegal \"bands\"\n"); + return -1; + } + if (prio2band.bands != 3) { + fprintf(stderr, "\"bands\" must be 3\n"); + return -1; + } + NEXT_ARG(); + if (strcmp(*argv, "priomap") != 0) { + fprintf(stderr, "\"priomap\" expected\n"); + return -1; + } + for (idx = 0; idx <= TC_PRIO_MAX; ++idx) { + unsigned band; + + if (!NEXT_ARG_OK()) { + fprintf(stderr, "Not enough elements in priomap\n"); + return -1; + } + NEXT_ARG(); + if (get_unsigned(&band, *argv, 10)) { + fprintf(stderr, "Illegal \"priomap\" element, number in [0..%u] expected\n", + prio2band.bands - 1); + return -1; + } + if (band >= prio2band.bands) { + fprintf(stderr, "\"priomap\" element %u too big\n", band); + return -1; + } + prio2band.priomap[idx] = band; + } + set_priomap = true; + } else if (strcmp(*argv, "weights") == 0) { + int idx; + + if (set_weights) { + fprintf(stderr, "Duplicate \"weights\"\n"); + return -1; + } + NEXT_ARG(); + for (idx = 0; idx < FQ_BANDS; ++idx) { + int val; + + if (!NEXT_ARG_OK()) { + fprintf(stderr, "Not enough elements in weights\n"); + return -1; + } + NEXT_ARG(); + if (get_integer(&val, *argv, 10)) { + fprintf(stderr, "Illegal \"weights\" element, positive number expected\n"); + return -1; + } + if (val < FQ_MIN_WEIGHT) { + fprintf(stderr, "\"weight\" element %d too small\n", val); + return -1; + } + weights[idx] = val; + } + set_weights = true; + } 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 (buckets) { + unsigned int log = ilog2(buckets); + + addattr_l(n, 1024, TCA_FQ_BUCKETS_LOG, + &log, sizeof(log)); + } + if (set_plimit) + addattr_l(n, 1024, TCA_FQ_PLIMIT, + &plimit, sizeof(plimit)); + if (set_flow_plimit) + addattr_l(n, 1024, TCA_FQ_FLOW_PLIMIT, + &flow_plimit, sizeof(flow_plimit)); + if (set_quantum) + addattr_l(n, 1024, TCA_FQ_QUANTUM, &quantum, sizeof(quantum)); + if (set_initial_quantum) + addattr_l(n, 1024, TCA_FQ_INITIAL_QUANTUM, + &initial_quantum, sizeof(initial_quantum)); + if (pacing != -1) + addattr_l(n, 1024, TCA_FQ_RATE_ENABLE, + &pacing, sizeof(pacing)); + if (set_maxrate) + addattr_l(n, 1024, TCA_FQ_FLOW_MAX_RATE, + &maxrate, sizeof(maxrate)); + if (set_low_rate_threshold) + addattr_l(n, 1024, TCA_FQ_LOW_RATE_THRESHOLD, + &low_rate_threshold, sizeof(low_rate_threshold)); + if (set_defrate) + addattr_l(n, 1024, TCA_FQ_FLOW_DEFAULT_RATE, + &defrate, sizeof(defrate)); + if (set_refill_delay) + addattr_l(n, 1024, TCA_FQ_FLOW_REFILL_DELAY, + &refill_delay, sizeof(refill_delay)); + if (set_orphan_mask) + addattr_l(n, 1024, TCA_FQ_ORPHAN_MASK, + &orphan_mask, sizeof(orphan_mask)); + if (set_ce_threshold) + addattr_l(n, 1024, TCA_FQ_CE_THRESHOLD, + &ce_threshold, sizeof(ce_threshold)); + if (set_timer_slack) + addattr_l(n, 1024, TCA_FQ_TIMER_SLACK, + &timer_slack, sizeof(timer_slack)); + if (set_horizon) + addattr_l(n, 1024, TCA_FQ_HORIZON, + &horizon, sizeof(horizon)); + if (horizon_drop != 255) + addattr_l(n, 1024, TCA_FQ_HORIZON_DROP, + &horizon_drop, sizeof(horizon_drop)); + if (set_priomap) + addattr_l(n, 1024, TCA_FQ_PRIOMAP, + &prio2band, sizeof(prio2band)); + if (set_weights) + addattr_l(n, 1024, TCA_FQ_WEIGHTS, + weights, sizeof(weights)); + addattr_nest_end(n, tail); + return 0; +} + +static int fq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) +{ + struct rtattr *tb[TCA_FQ_MAX + 1]; + unsigned int plimit, flow_plimit; + unsigned int buckets_log; + int pacing; + unsigned int rate, quantum; + unsigned int refill_delay; + unsigned int orphan_mask; + unsigned int ce_threshold; + unsigned int timer_slack; + unsigned int horizon; + __u8 horizon_drop; + + SPRINT_BUF(b1); + + if (opt == NULL) + return 0; + + parse_rtattr_nested(tb, TCA_FQ_MAX, opt); + + if (tb[TCA_FQ_PLIMIT] && + RTA_PAYLOAD(tb[TCA_FQ_PLIMIT]) >= sizeof(__u32)) { + plimit = rta_getattr_u32(tb[TCA_FQ_PLIMIT]); + print_uint(PRINT_ANY, "limit", "limit %up ", plimit); + } + if (tb[TCA_FQ_FLOW_PLIMIT] && + RTA_PAYLOAD(tb[TCA_FQ_FLOW_PLIMIT]) >= sizeof(__u32)) { + flow_plimit = rta_getattr_u32(tb[TCA_FQ_FLOW_PLIMIT]); + print_uint(PRINT_ANY, "flow_limit", "flow_limit %up ", + flow_plimit); + } + if (tb[TCA_FQ_BUCKETS_LOG] && + RTA_PAYLOAD(tb[TCA_FQ_BUCKETS_LOG]) >= sizeof(__u32)) { + buckets_log = rta_getattr_u32(tb[TCA_FQ_BUCKETS_LOG]); + print_uint(PRINT_ANY, "buckets", "buckets %u ", + 1U << buckets_log); + } + if (tb[TCA_FQ_ORPHAN_MASK] && + RTA_PAYLOAD(tb[TCA_FQ_ORPHAN_MASK]) >= sizeof(__u32)) { + orphan_mask = rta_getattr_u32(tb[TCA_FQ_ORPHAN_MASK]); + print_uint(PRINT_ANY, "orphan_mask", "orphan_mask %u ", + orphan_mask); + } + if (tb[TCA_FQ_RATE_ENABLE] && + RTA_PAYLOAD(tb[TCA_FQ_RATE_ENABLE]) >= sizeof(int)) { + pacing = rta_getattr_u32(tb[TCA_FQ_RATE_ENABLE]); + if (pacing == 0) + print_bool(PRINT_ANY, "pacing", "nopacing ", false); + } + if (tb[TCA_FQ_PRIOMAP] && + RTA_PAYLOAD(tb[TCA_FQ_PRIOMAP]) >= sizeof(struct tc_prio_qopt)) { + struct tc_prio_qopt *prio2band = RTA_DATA(tb[TCA_FQ_PRIOMAP]); + int i; + + print_uint(PRINT_ANY, "bands", "bands %u ", prio2band->bands); + open_json_array(PRINT_ANY, "priomap "); + for (i = 0; i <= TC_PRIO_MAX; i++) + print_uint(PRINT_ANY, NULL, "%d ", prio2band->priomap[i]); + close_json_array(PRINT_ANY, ""); + } + if (tb[TCA_FQ_WEIGHTS] && + RTA_PAYLOAD(tb[TCA_FQ_WEIGHTS]) >= FQ_BANDS * sizeof(int)) { + const int *weights = RTA_DATA(tb[TCA_FQ_WEIGHTS]); + int i; + + open_json_array(PRINT_ANY, "weights "); + for (i = 0; i < FQ_BANDS; ++i) + print_uint(PRINT_ANY, NULL, "%d ", weights[i]); + close_json_array(PRINT_ANY, ""); + } + if (tb[TCA_FQ_QUANTUM] && + RTA_PAYLOAD(tb[TCA_FQ_QUANTUM]) >= sizeof(__u32)) { + quantum = rta_getattr_u32(tb[TCA_FQ_QUANTUM]); + print_size(PRINT_ANY, "quantum", "quantum %s ", quantum); + } + if (tb[TCA_FQ_INITIAL_QUANTUM] && + RTA_PAYLOAD(tb[TCA_FQ_INITIAL_QUANTUM]) >= sizeof(__u32)) { + quantum = rta_getattr_u32(tb[TCA_FQ_INITIAL_QUANTUM]); + print_size(PRINT_ANY, "initial_quantum", "initial_quantum %s ", + quantum); + } + if (tb[TCA_FQ_FLOW_MAX_RATE] && + RTA_PAYLOAD(tb[TCA_FQ_FLOW_MAX_RATE]) >= sizeof(__u32)) { + rate = rta_getattr_u32(tb[TCA_FQ_FLOW_MAX_RATE]); + + if (rate != ~0U) + tc_print_rate(PRINT_ANY, + "maxrate", "maxrate %s ", rate); + } + if (tb[TCA_FQ_FLOW_DEFAULT_RATE] && + RTA_PAYLOAD(tb[TCA_FQ_FLOW_DEFAULT_RATE]) >= sizeof(__u32)) { + rate = rta_getattr_u32(tb[TCA_FQ_FLOW_DEFAULT_RATE]); + + if (rate != 0) + tc_print_rate(PRINT_ANY, + "defrate", "defrate %s ", rate); + } + if (tb[TCA_FQ_LOW_RATE_THRESHOLD] && + RTA_PAYLOAD(tb[TCA_FQ_LOW_RATE_THRESHOLD]) >= sizeof(__u32)) { + rate = rta_getattr_u32(tb[TCA_FQ_LOW_RATE_THRESHOLD]); + + if (rate != 0) + tc_print_rate(PRINT_ANY, "low_rate_threshold", + "low_rate_threshold %s ", rate); + } + if (tb[TCA_FQ_FLOW_REFILL_DELAY] && + RTA_PAYLOAD(tb[TCA_FQ_FLOW_REFILL_DELAY]) >= sizeof(__u32)) { + refill_delay = rta_getattr_u32(tb[TCA_FQ_FLOW_REFILL_DELAY]); + print_uint(PRINT_JSON, "refill_delay", NULL, refill_delay); + print_string(PRINT_FP, NULL, "refill_delay %s ", + sprint_time(refill_delay, b1)); + } + + if (tb[TCA_FQ_CE_THRESHOLD] && + RTA_PAYLOAD(tb[TCA_FQ_CE_THRESHOLD]) >= sizeof(__u32)) { + ce_threshold = rta_getattr_u32(tb[TCA_FQ_CE_THRESHOLD]); + if (ce_threshold != ~0U) { + 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_TIMER_SLACK] && + RTA_PAYLOAD(tb[TCA_FQ_TIMER_SLACK]) >= sizeof(__u32)) { + timer_slack = rta_getattr_u32(tb[TCA_FQ_TIMER_SLACK]); + print_uint(PRINT_JSON, "timer_slack", NULL, timer_slack); + print_string(PRINT_FP, NULL, "timer_slack %s ", + sprint_time64(timer_slack, b1)); + } + + if (tb[TCA_FQ_HORIZON] && + RTA_PAYLOAD(tb[TCA_FQ_HORIZON]) >= sizeof(__u32)) { + horizon = rta_getattr_u32(tb[TCA_FQ_HORIZON]); + print_uint(PRINT_JSON, "horizon", NULL, horizon); + print_string(PRINT_FP, NULL, "horizon %s ", + sprint_time(horizon, b1)); + } + + if (tb[TCA_FQ_HORIZON_DROP] && + RTA_PAYLOAD(tb[TCA_FQ_HORIZON_DROP]) >= sizeof(__u8)) { + horizon_drop = rta_getattr_u8(tb[TCA_FQ_HORIZON_DROP]); + if (!horizon_drop) + print_null(PRINT_ANY, "horizon_cap", "horizon_cap ", NULL); + else + print_null(PRINT_ANY, "horizon_drop", "horizon_drop ", NULL); + } + + return 0; +} + +static int fq_print_xstats(struct qdisc_util *qu, FILE *f, + struct rtattr *xstats) +{ + struct tc_fq_qd_stats *st, _st; + + SPRINT_BUF(b1); + + if (xstats == NULL) + return 0; + + memset(&_st, 0, sizeof(_st)); + memcpy(&_st, RTA_DATA(xstats), min(RTA_PAYLOAD(xstats), sizeof(*st))); + + st = &_st; + + print_uint(PRINT_ANY, "flows", " flows %u", st->flows); + print_uint(PRINT_ANY, "inactive", " (inactive %u", st->inactive_flows); + print_uint(PRINT_ANY, "throttled", " throttled %u)", + st->throttled_flows); + + print_uint(PRINT_ANY, "band0_pkts", " band0_pkts %u", st->band_pkt_count[0]); + print_uint(PRINT_ANY, "band1_pkts", " band1_pkts %u", st->band_pkt_count[1]); + print_uint(PRINT_ANY, "band2_pkts", " band2_pkts %u", st->band_pkt_count[2]); + + if (st->time_next_delayed_flow > 0) { + print_lluint(PRINT_JSON, "next_packet_delay", NULL, + st->time_next_delayed_flow); + print_string(PRINT_FP, NULL, " next_packet_delay %s", + sprint_time64(st->time_next_delayed_flow, b1)); + } + + print_nl(); + print_lluint(PRINT_ANY, "gc", " gc %llu", st->gc_flows); + print_lluint(PRINT_ANY, "highprio", " highprio %llu", + st->highprio_packets); + + if (st->fastpath_packets) + print_lluint(PRINT_ANY, "fastpath", " fastpath %llu", + st->fastpath_packets); + + if (st->tcp_retrans) + print_lluint(PRINT_ANY, "retrans", " retrans %llu", + st->tcp_retrans); + + print_lluint(PRINT_ANY, "throttled", " throttled %llu", st->throttled); + + if (st->unthrottle_latency_ns) { + print_uint(PRINT_JSON, "latency", NULL, + st->unthrottle_latency_ns); + print_string(PRINT_FP, NULL, " latency %s", + sprint_time64(st->unthrottle_latency_ns, b1)); + } + + if (st->ce_mark) + print_lluint(PRINT_ANY, "ce_mark", " ce_mark %llu", + st->ce_mark); + + if (st->flows_plimit) + print_lluint(PRINT_ANY, "flows_plimit", " flows_plimit %llu", + st->flows_plimit); + + if (st->pkts_too_long || st->allocation_errors || + st->horizon_drops || st->horizon_caps || + st->band_drops[0] || + st->band_drops[1] || + st->band_drops[2]) { + print_nl(); + if (st->pkts_too_long) + print_lluint(PRINT_ANY, "pkts_too_long", + " pkts_too_long %llu", + st->pkts_too_long); + if (st->allocation_errors) + print_lluint(PRINT_ANY, "alloc_errors", + " alloc_errors %llu", + st->allocation_errors); + if (st->horizon_drops) + print_lluint(PRINT_ANY, "horizon_drops", + " horizon_drops %llu", + st->horizon_drops); + if (st->horizon_caps) + print_lluint(PRINT_ANY, "horizon_caps", + " horizon_caps %llu", + st->horizon_caps); + if (st->band_drops[0]) + print_lluint(PRINT_ANY, "band0_drops", + " band0_drops %llu", + st->band_drops[0]); + if (st->band_drops[1]) + print_lluint(PRINT_ANY, "band1_drops", + " band1_drops %llu", + st->band_drops[1]); + if (st->band_drops[2]) + print_lluint(PRINT_ANY, "band2_drops", + " band2_drops %llu", + st->band_drops[2]); + } + + return 0; +} + +struct qdisc_util fq_qdisc_util = { + .id = "fq", + .parse_qopt = fq_parse_opt, + .print_qopt = fq_print_opt, + .print_xstats = fq_print_xstats, +}; |