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Diffstat (limited to '')
| -rw-r--r-- | tc/q_sfb.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/tc/q_sfb.c b/tc/q_sfb.c new file mode 100644 index 0000000..a2eef28 --- /dev/null +++ b/tc/q_sfb.c @@ -0,0 +1,212 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * q_sfb.c Stochastic Fair Blue. + * + * Authors: Juliusz Chroboczek <jch@pps.jussieu.fr> + */ + +#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: ... sfb [ rehash SECS ] [ db SECS ]\n" + " [ limit PACKETS ] [ max PACKETS ] [ target PACKETS ]\n" + " [ increment FLOAT ] [ decrement FLOAT ]\n" + " [ penalty_rate PPS ] [ penalty_burst PACKETS ]\n"); +} + +static int get_prob(__u32 *val, const char *arg) +{ + double d; + char *ptr; + + if (!arg || !*arg) + return -1; + d = strtod(arg, &ptr); + if (!ptr || ptr == arg || d < 0.0 || d > 1.0) + return -1; + *val = (__u32)(d * SFB_MAX_PROB + 0.5); + return 0; +} + +static int sfb_parse_opt(struct qdisc_util *qu, int argc, char **argv, + struct nlmsghdr *n, const char *dev) +{ + struct tc_sfb_qopt opt = { + .rehash_interval = 600*1000, + .warmup_time = 60*1000, + .penalty_rate = 10, + .penalty_burst = 20, + .increment = (SFB_MAX_PROB + 1000) / 2000, + .decrement = (SFB_MAX_PROB + 10000) / 20000, + }; + struct rtattr *tail; + + while (argc > 0) { + if (strcmp(*argv, "rehash") == 0) { + NEXT_ARG(); + if (get_u32(&opt.rehash_interval, *argv, 0)) { + fprintf(stderr, "Illegal \"rehash\"\n"); + return -1; + } + } else if (strcmp(*argv, "db") == 0) { + NEXT_ARG(); + if (get_u32(&opt.warmup_time, *argv, 0)) { + fprintf(stderr, "Illegal \"db\"\n"); + return -1; + } + } else if (strcmp(*argv, "limit") == 0) { + NEXT_ARG(); + if (get_u32(&opt.limit, *argv, 0)) { + fprintf(stderr, "Illegal \"limit\"\n"); + return -1; + } + } else if (strcmp(*argv, "max") == 0) { + NEXT_ARG(); + if (get_u32(&opt.max, *argv, 0)) { + fprintf(stderr, "Illegal \"max\"\n"); + return -1; + } + } else if (strcmp(*argv, "target") == 0) { + NEXT_ARG(); + if (get_u32(&opt.bin_size, *argv, 0)) { + fprintf(stderr, "Illegal \"target\"\n"); + return -1; + } + } else if (strcmp(*argv, "increment") == 0) { + NEXT_ARG(); + if (get_prob(&opt.increment, *argv)) { + fprintf(stderr, "Illegal \"increment\"\n"); + return -1; + } + } else if (strcmp(*argv, "decrement") == 0) { + NEXT_ARG(); + if (get_prob(&opt.decrement, *argv)) { + fprintf(stderr, "Illegal \"decrement\"\n"); + return -1; + } + } else if (strcmp(*argv, "penalty_rate") == 0) { + NEXT_ARG(); + if (get_u32(&opt.penalty_rate, *argv, 0)) { + fprintf(stderr, "Illegal \"penalty_rate\"\n"); + return -1; + } + } else if (strcmp(*argv, "penalty_burst") == 0) { + NEXT_ARG(); + if (get_u32(&opt.penalty_burst, *argv, 0)) { + fprintf(stderr, "Illegal \"penalty_burst\"\n"); + return -1; + } + } else { + fprintf(stderr, "What is \"%s\"?\n", *argv); + explain(); + return -1; + } + argc--; argv++; + } + + if (opt.max == 0) { + if (opt.bin_size >= 1) + opt.max = (opt.bin_size * 5 + 1) / 4; + else + opt.max = 25; + } + if (opt.bin_size == 0) + opt.bin_size = (opt.max * 4 + 3) / 5; + + tail = addattr_nest(n, 1024, TCA_OPTIONS); + addattr_l(n, 1024, TCA_SFB_PARMS, &opt, sizeof(opt)); + addattr_nest_end(n, tail); + return 0; +} + +static int sfb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) +{ + struct rtattr *tb[__TCA_SFB_MAX]; + struct tc_sfb_qopt *qopt; + + SPRINT_BUF(b1); + + if (opt == NULL) + return 0; + + parse_rtattr_nested(tb, TCA_SFB_MAX, opt); + if (tb[TCA_SFB_PARMS] == NULL) + return -1; + qopt = RTA_DATA(tb[TCA_SFB_PARMS]); + if (RTA_PAYLOAD(tb[TCA_SFB_PARMS]) < sizeof(*qopt)) + return -1; + + print_uint(PRINT_JSON, "rehash", NULL, qopt->rehash_interval * 1000); + print_string(PRINT_FP, NULL, "rehash %s ", + sprint_time(qopt->rehash_interval * 1000, b1)); + + print_uint(PRINT_JSON, "db", NULL, qopt->warmup_time * 1000); + print_string(PRINT_FP, NULL, "db %s ", + sprint_time(qopt->warmup_time * 1000, b1)); + + print_uint(PRINT_ANY, "limit", "limit %up ", qopt->limit); + print_uint(PRINT_ANY, "max", "max %up ", qopt->max); + print_uint(PRINT_ANY, "target", "target %up ", qopt->bin_size); + + print_float(PRINT_ANY, "increment", "increment %lg ", + (double)qopt->increment / SFB_MAX_PROB); + print_float(PRINT_ANY, "decrement", "decrement %lg ", + (double)qopt->decrement / SFB_MAX_PROB); + + print_uint(PRINT_ANY, "penalty_rate", "penalty_rate %upps ", + qopt->penalty_rate); + print_uint(PRINT_ANY, "penalty_burst", "penalty_burst %up ", + qopt->penalty_burst); + + return 0; +} + +static int sfb_print_xstats(struct qdisc_util *qu, FILE *f, + struct rtattr *xstats) +{ + struct tc_sfb_xstats *st; + + if (xstats == NULL) + return 0; + + if (RTA_PAYLOAD(xstats) < sizeof(*st)) + return -1; + + st = RTA_DATA(xstats); + + print_uint(PRINT_ANY, "earlydrop", " earlydrop %u", st->earlydrop); + print_uint(PRINT_ANY, "penaltydrop", " penaltydrop %u", + st->penaltydrop); + print_uint(PRINT_ANY, "bucketdrop", " bucketdrop %u", st->bucketdrop); + print_uint(PRINT_ANY, "queuedrop", " queuedrop %u", st->queuedrop); + print_uint(PRINT_ANY, "childdrop", " childdrop %u", st->childdrop); + print_uint(PRINT_ANY, "marked", " marked %u", st->marked); + print_nl(); + print_uint(PRINT_ANY, "maxqlen", " maxqlen %u", st->maxqlen); + + print_float(PRINT_ANY, "maxprob", " maxprob %lg", + (double)st->maxprob / SFB_MAX_PROB); + print_float(PRINT_ANY, "avgprob", " avgprob %lg", + (double)st->avgprob / SFB_MAX_PROB); + + return 0; +} + +struct qdisc_util sfb_qdisc_util = { + .id = "sfb", + .parse_qopt = sfb_parse_opt, + .print_qopt = sfb_print_opt, + .print_xstats = sfb_print_xstats, +}; |